AudioPolicyManager.cpp revision 3ae5f31393609b7fa92f24132c66e9a8c9244a45 
1/*
2 * Copyright (C) 2009 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#define LOG_TAG "AudioPolicyManager"
18//#define LOG_NDEBUG 0
19
20//#define VERY_VERBOSE_LOGGING
21#ifdef VERY_VERBOSE_LOGGING
22#define ALOGVV ALOGV
23#else
24#define ALOGVV(a...) do { } while(0)
25#endif
26
27// A device mask for all audio input devices that are considered "virtual" when evaluating
28// active inputs in getActiveInput()
29#define APM_AUDIO_IN_DEVICE_VIRTUAL_ALL  (AUDIO_DEVICE_IN_REMOTE_SUBMIX|AUDIO_DEVICE_IN_FM_TUNER)
30// A device mask for all audio output devices that are considered "remote" when evaluating
31// active output devices in isStreamActiveRemotely()
32#define APM_AUDIO_OUT_DEVICE_REMOTE_ALL  AUDIO_DEVICE_OUT_REMOTE_SUBMIX
33// A device mask for all audio input and output devices where matching inputs/outputs on device
34// type alone is not enough: the address must match too
35#define APM_AUDIO_DEVICE_MATCH_ADDRESS_ALL (AUDIO_DEVICE_IN_REMOTE_SUBMIX | \
36                                            AUDIO_DEVICE_OUT_REMOTE_SUBMIX)
37
38#include <inttypes.h>
39#include <math.h>
40
41#include <cutils/properties.h>
42#include <utils/Log.h>
43#include <hardware/audio.h>
44#include <hardware/audio_effect.h>
45#include <media/AudioParameter.h>
46#include <media/AudioPolicyHelper.h>
47#include <soundtrigger/SoundTrigger.h>
48#include "AudioPolicyManager.h"
49#include "audio_policy_conf.h"
50
51namespace android {
52
53// ----------------------------------------------------------------------------
54// Definitions for audio_policy.conf file parsing
55// ----------------------------------------------------------------------------
56
57struct StringToEnum {
58    const char *name;
59    uint32_t value;
60};
61
62#define STRING_TO_ENUM(string) { #string, string }
63#define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
64
65const StringToEnum sDeviceNameToEnumTable[] = {
66    STRING_TO_ENUM(AUDIO_DEVICE_OUT_EARPIECE),
67    STRING_TO_ENUM(AUDIO_DEVICE_OUT_SPEAKER),
68    STRING_TO_ENUM(AUDIO_DEVICE_OUT_SPEAKER_SAFE),
69    STRING_TO_ENUM(AUDIO_DEVICE_OUT_WIRED_HEADSET),
70    STRING_TO_ENUM(AUDIO_DEVICE_OUT_WIRED_HEADPHONE),
71    STRING_TO_ENUM(AUDIO_DEVICE_OUT_BLUETOOTH_SCO),
72    STRING_TO_ENUM(AUDIO_DEVICE_OUT_BLUETOOTH_SCO_HEADSET),
73    STRING_TO_ENUM(AUDIO_DEVICE_OUT_BLUETOOTH_SCO_CARKIT),
74    STRING_TO_ENUM(AUDIO_DEVICE_OUT_ALL_SCO),
75    STRING_TO_ENUM(AUDIO_DEVICE_OUT_BLUETOOTH_A2DP),
76    STRING_TO_ENUM(AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES),
77    STRING_TO_ENUM(AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER),
78    STRING_TO_ENUM(AUDIO_DEVICE_OUT_ALL_A2DP),
79    STRING_TO_ENUM(AUDIO_DEVICE_OUT_AUX_DIGITAL),
80    STRING_TO_ENUM(AUDIO_DEVICE_OUT_HDMI),
81    STRING_TO_ENUM(AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET),
82    STRING_TO_ENUM(AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET),
83    STRING_TO_ENUM(AUDIO_DEVICE_OUT_USB_ACCESSORY),
84    STRING_TO_ENUM(AUDIO_DEVICE_OUT_USB_DEVICE),
85    STRING_TO_ENUM(AUDIO_DEVICE_OUT_ALL_USB),
86    STRING_TO_ENUM(AUDIO_DEVICE_OUT_REMOTE_SUBMIX),
87    STRING_TO_ENUM(AUDIO_DEVICE_OUT_TELEPHONY_TX),
88    STRING_TO_ENUM(AUDIO_DEVICE_OUT_LINE),
89    STRING_TO_ENUM(AUDIO_DEVICE_OUT_HDMI_ARC),
90    STRING_TO_ENUM(AUDIO_DEVICE_OUT_SPDIF),
91    STRING_TO_ENUM(AUDIO_DEVICE_OUT_FM),
92    STRING_TO_ENUM(AUDIO_DEVICE_OUT_AUX_LINE),
93    STRING_TO_ENUM(AUDIO_DEVICE_IN_AMBIENT),
94    STRING_TO_ENUM(AUDIO_DEVICE_IN_BUILTIN_MIC),
95    STRING_TO_ENUM(AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET),
96    STRING_TO_ENUM(AUDIO_DEVICE_IN_ALL_SCO),
97    STRING_TO_ENUM(AUDIO_DEVICE_IN_WIRED_HEADSET),
98    STRING_TO_ENUM(AUDIO_DEVICE_IN_AUX_DIGITAL),
99    STRING_TO_ENUM(AUDIO_DEVICE_IN_HDMI),
100    STRING_TO_ENUM(AUDIO_DEVICE_IN_TELEPHONY_RX),
101    STRING_TO_ENUM(AUDIO_DEVICE_IN_VOICE_CALL),
102    STRING_TO_ENUM(AUDIO_DEVICE_IN_BACK_MIC),
103    STRING_TO_ENUM(AUDIO_DEVICE_IN_REMOTE_SUBMIX),
104    STRING_TO_ENUM(AUDIO_DEVICE_IN_ANLG_DOCK_HEADSET),
105    STRING_TO_ENUM(AUDIO_DEVICE_IN_DGTL_DOCK_HEADSET),
106    STRING_TO_ENUM(AUDIO_DEVICE_IN_USB_ACCESSORY),
107    STRING_TO_ENUM(AUDIO_DEVICE_IN_USB_DEVICE),
108    STRING_TO_ENUM(AUDIO_DEVICE_IN_FM_TUNER),
109    STRING_TO_ENUM(AUDIO_DEVICE_IN_TV_TUNER),
110    STRING_TO_ENUM(AUDIO_DEVICE_IN_LINE),
111    STRING_TO_ENUM(AUDIO_DEVICE_IN_SPDIF),
112    STRING_TO_ENUM(AUDIO_DEVICE_IN_BLUETOOTH_A2DP),
113    STRING_TO_ENUM(AUDIO_DEVICE_IN_LOOPBACK),
114};
115
116const StringToEnum sOutputFlagNameToEnumTable[] = {
117    STRING_TO_ENUM(AUDIO_OUTPUT_FLAG_DIRECT),
118    STRING_TO_ENUM(AUDIO_OUTPUT_FLAG_PRIMARY),
119    STRING_TO_ENUM(AUDIO_OUTPUT_FLAG_FAST),
120    STRING_TO_ENUM(AUDIO_OUTPUT_FLAG_DEEP_BUFFER),
121    STRING_TO_ENUM(AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD),
122    STRING_TO_ENUM(AUDIO_OUTPUT_FLAG_NON_BLOCKING),
123    STRING_TO_ENUM(AUDIO_OUTPUT_FLAG_HW_AV_SYNC),
124};
125
126const StringToEnum sInputFlagNameToEnumTable[] = {
127    STRING_TO_ENUM(AUDIO_INPUT_FLAG_FAST),
128    STRING_TO_ENUM(AUDIO_INPUT_FLAG_HW_HOTWORD),
129};
130
131const StringToEnum sFormatNameToEnumTable[] = {
132    STRING_TO_ENUM(AUDIO_FORMAT_PCM_16_BIT),
133    STRING_TO_ENUM(AUDIO_FORMAT_PCM_8_BIT),
134    STRING_TO_ENUM(AUDIO_FORMAT_PCM_32_BIT),
135    STRING_TO_ENUM(AUDIO_FORMAT_PCM_8_24_BIT),
136    STRING_TO_ENUM(AUDIO_FORMAT_PCM_FLOAT),
137    STRING_TO_ENUM(AUDIO_FORMAT_PCM_24_BIT_PACKED),
138    STRING_TO_ENUM(AUDIO_FORMAT_MP3),
139    STRING_TO_ENUM(AUDIO_FORMAT_AAC),
140    STRING_TO_ENUM(AUDIO_FORMAT_AAC_MAIN),
141    STRING_TO_ENUM(AUDIO_FORMAT_AAC_LC),
142    STRING_TO_ENUM(AUDIO_FORMAT_AAC_SSR),
143    STRING_TO_ENUM(AUDIO_FORMAT_AAC_LTP),
144    STRING_TO_ENUM(AUDIO_FORMAT_AAC_HE_V1),
145    STRING_TO_ENUM(AUDIO_FORMAT_AAC_SCALABLE),
146    STRING_TO_ENUM(AUDIO_FORMAT_AAC_ERLC),
147    STRING_TO_ENUM(AUDIO_FORMAT_AAC_LD),
148    STRING_TO_ENUM(AUDIO_FORMAT_AAC_HE_V2),
149    STRING_TO_ENUM(AUDIO_FORMAT_AAC_ELD),
150    STRING_TO_ENUM(AUDIO_FORMAT_VORBIS),
151    STRING_TO_ENUM(AUDIO_FORMAT_HE_AAC_V1),
152    STRING_TO_ENUM(AUDIO_FORMAT_HE_AAC_V2),
153    STRING_TO_ENUM(AUDIO_FORMAT_OPUS),
154    STRING_TO_ENUM(AUDIO_FORMAT_AC3),
155    STRING_TO_ENUM(AUDIO_FORMAT_E_AC3),
156};
157
158const StringToEnum sOutChannelsNameToEnumTable[] = {
159    STRING_TO_ENUM(AUDIO_CHANNEL_OUT_MONO),
160    STRING_TO_ENUM(AUDIO_CHANNEL_OUT_STEREO),
161    STRING_TO_ENUM(AUDIO_CHANNEL_OUT_QUAD),
162    STRING_TO_ENUM(AUDIO_CHANNEL_OUT_5POINT1),
163    STRING_TO_ENUM(AUDIO_CHANNEL_OUT_7POINT1),
164};
165
166const StringToEnum sInChannelsNameToEnumTable[] = {
167    STRING_TO_ENUM(AUDIO_CHANNEL_IN_MONO),
168    STRING_TO_ENUM(AUDIO_CHANNEL_IN_STEREO),
169    STRING_TO_ENUM(AUDIO_CHANNEL_IN_FRONT_BACK),
170};
171
172const StringToEnum sGainModeNameToEnumTable[] = {
173    STRING_TO_ENUM(AUDIO_GAIN_MODE_JOINT),
174    STRING_TO_ENUM(AUDIO_GAIN_MODE_CHANNELS),
175    STRING_TO_ENUM(AUDIO_GAIN_MODE_RAMP),
176};
177
178
179uint32_t AudioPolicyManager::stringToEnum(const struct StringToEnum *table,
180                                              size_t size,
181                                              const char *name)
182{
183    for (size_t i = 0; i < size; i++) {
184        if (strcmp(table[i].name, name) == 0) {
185            ALOGV("stringToEnum() found %s", table[i].name);
186            return table[i].value;
187        }
188    }
189    return 0;
190}
191
192const char *AudioPolicyManager::enumToString(const struct StringToEnum *table,
193                                              size_t size,
194                                              uint32_t value)
195{
196    for (size_t i = 0; i < size; i++) {
197        if (table[i].value == value) {
198            return table[i].name;
199        }
200    }
201    return "";
202}
203
204bool AudioPolicyManager::stringToBool(const char *value)
205{
206    return ((strcasecmp("true", value) == 0) || (strcmp("1", value) == 0));
207}
208
209
210// ----------------------------------------------------------------------------
211// AudioPolicyInterface implementation
212// ----------------------------------------------------------------------------
213
214status_t AudioPolicyManager::setDeviceConnectionState(audio_devices_t device,
215                                                          audio_policy_dev_state_t state,
216                                                  const char *device_address)
217{
218    return setDeviceConnectionStateInt(device, state, device_address);
219}
220
221status_t AudioPolicyManager::setDeviceConnectionStateInt(audio_devices_t device,
222                                                         audio_policy_dev_state_t state,
223                                                         const char *device_address)
224{
225    ALOGV("setDeviceConnectionState() device: %x, state %d, address %s",
226            device, state, device_address != NULL ? device_address : "");
227
228    // connect/disconnect only 1 device at a time
229    if (!audio_is_output_device(device) && !audio_is_input_device(device)) return BAD_VALUE;
230
231    sp<DeviceDescriptor> devDesc = getDeviceDescriptor(device, device_address);
232
233    // handle output devices
234    if (audio_is_output_device(device)) {
235        SortedVector <audio_io_handle_t> outputs;
236
237        ssize_t index = mAvailableOutputDevices.indexOf(devDesc);
238
239        // save a copy of the opened output descriptors before any output is opened or closed
240        // by checkOutputsForDevice(). This will be needed by checkOutputForAllStrategies()
241        mPreviousOutputs = mOutputs;
242        switch (state)
243        {
244        // handle output device connection
245        case AUDIO_POLICY_DEVICE_STATE_AVAILABLE: {
246            if (index >= 0) {
247                ALOGW("setDeviceConnectionState() device already connected: %x", device);
248                return INVALID_OPERATION;
249            }
250            ALOGV("setDeviceConnectionState() connecting device %x", device);
251
252            // register new device as available
253            index = mAvailableOutputDevices.add(devDesc);
254            if (index >= 0) {
255                sp<HwModule> module = getModuleForDevice(device);
256                if (module == 0) {
257                    ALOGD("setDeviceConnectionState() could not find HW module for device %08x",
258                          device);
259                    mAvailableOutputDevices.remove(devDesc);
260                    return INVALID_OPERATION;
261                }
262                mAvailableOutputDevices[index]->mId = nextUniqueId();
263                mAvailableOutputDevices[index]->mModule = module;
264            } else {
265                return NO_MEMORY;
266            }
267
268            if (checkOutputsForDevice(devDesc, state, outputs, devDesc->mAddress) != NO_ERROR) {
269                mAvailableOutputDevices.remove(devDesc);
270                return INVALID_OPERATION;
271            }
272            // outputs should never be empty here
273            ALOG_ASSERT(outputs.size() != 0, "setDeviceConnectionState():"
274                    "checkOutputsForDevice() returned no outputs but status OK");
275            ALOGV("setDeviceConnectionState() checkOutputsForDevice() returned %zu outputs",
276                  outputs.size());
277
278
279            // Set connect to HALs
280            AudioParameter param = AudioParameter(devDesc->mAddress);
281            param.addInt(String8(AUDIO_PARAMETER_DEVICE_CONNECT), device);
282            mpClientInterface->setParameters(AUDIO_IO_HANDLE_NONE, param.toString());
283
284            } break;
285        // handle output device disconnection
286        case AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE: {
287            if (index < 0) {
288                ALOGW("setDeviceConnectionState() device not connected: %x", device);
289                return INVALID_OPERATION;
290            }
291
292            ALOGV("setDeviceConnectionState() disconnecting output device %x", device);
293
294            // Set Disconnect to HALs
295            AudioParameter param = AudioParameter(devDesc->mAddress);
296            param.addInt(String8(AUDIO_PARAMETER_DEVICE_DISCONNECT), device);
297            mpClientInterface->setParameters(AUDIO_IO_HANDLE_NONE, param.toString());
298
299            // remove device from available output devices
300            mAvailableOutputDevices.remove(devDesc);
301
302            checkOutputsForDevice(devDesc, state, outputs, devDesc->mAddress);
303            } break;
304
305        default:
306            ALOGE("setDeviceConnectionState() invalid state: %x", state);
307            return BAD_VALUE;
308        }
309
310        // checkA2dpSuspend must run before checkOutputForAllStrategies so that A2DP
311        // output is suspended before any tracks are moved to it
312        checkA2dpSuspend();
313        checkOutputForAllStrategies();
314        // outputs must be closed after checkOutputForAllStrategies() is executed
315        if (!outputs.isEmpty()) {
316            for (size_t i = 0; i < outputs.size(); i++) {
317                sp<AudioOutputDescriptor> desc = mOutputs.valueFor(outputs[i]);
318                // close unused outputs after device disconnection or direct outputs that have been
319                // opened by checkOutputsForDevice() to query dynamic parameters
320                if ((state == AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE) ||
321                        (((desc->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) != 0) &&
322                         (desc->mDirectOpenCount == 0))) {
323                    closeOutput(outputs[i]);
324                }
325            }
326            // check again after closing A2DP output to reset mA2dpSuspended if needed
327            checkA2dpSuspend();
328        }
329
330        updateDevicesAndOutputs();
331        if (mPhoneState == AUDIO_MODE_IN_CALL) {
332            audio_devices_t newDevice = getNewOutputDevice(mPrimaryOutput, false /*fromCache*/);
333            updateCallRouting(newDevice);
334        }
335        for (size_t i = 0; i < mOutputs.size(); i++) {
336            audio_io_handle_t output = mOutputs.keyAt(i);
337            if ((mPhoneState != AUDIO_MODE_IN_CALL) || (output != mPrimaryOutput)) {
338                audio_devices_t newDevice = getNewOutputDevice(mOutputs.keyAt(i),
339                                                               true /*fromCache*/);
340                // do not force device change on duplicated output because if device is 0, it will
341                // also force a device 0 for the two outputs it is duplicated to which may override
342                // a valid device selection on those outputs.
343                bool force = !mOutputs.valueAt(i)->isDuplicated()
344                        && (!deviceDistinguishesOnAddress(device)
345                                // always force when disconnecting (a non-duplicated device)
346                                || (state == AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE));
347                setOutputDevice(output, newDevice, force, 0);
348            }
349        }
350
351        mpClientInterface->onAudioPortListUpdate();
352        return NO_ERROR;
353    }  // end if is output device
354
355    // handle input devices
356    if (audio_is_input_device(device)) {
357        SortedVector <audio_io_handle_t> inputs;
358
359        ssize_t index = mAvailableInputDevices.indexOf(devDesc);
360        switch (state)
361        {
362        // handle input device connection
363        case AUDIO_POLICY_DEVICE_STATE_AVAILABLE: {
364            if (index >= 0) {
365                ALOGW("setDeviceConnectionState() device already connected: %d", device);
366                return INVALID_OPERATION;
367            }
368            sp<HwModule> module = getModuleForDevice(device);
369            if (module == NULL) {
370                ALOGW("setDeviceConnectionState(): could not find HW module for device %08x",
371                      device);
372                return INVALID_OPERATION;
373            }
374            if (checkInputsForDevice(device, state, inputs, devDesc->mAddress) != NO_ERROR) {
375                return INVALID_OPERATION;
376            }
377
378            index = mAvailableInputDevices.add(devDesc);
379            if (index >= 0) {
380                mAvailableInputDevices[index]->mId = nextUniqueId();
381                mAvailableInputDevices[index]->mModule = module;
382            } else {
383                return NO_MEMORY;
384            }
385
386            // Set connect to HALs
387            AudioParameter param = AudioParameter(devDesc->mAddress);
388            param.addInt(String8(AUDIO_PARAMETER_DEVICE_CONNECT), device);
389            mpClientInterface->setParameters(AUDIO_IO_HANDLE_NONE, param.toString());
390
391        } break;
392
393        // handle input device disconnection
394        case AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE: {
395            if (index < 0) {
396                ALOGW("setDeviceConnectionState() device not connected: %d", device);
397                return INVALID_OPERATION;
398            }
399
400            ALOGV("setDeviceConnectionState() disconnecting input device %x", device);
401
402            // Set Disconnect to HALs
403            AudioParameter param = AudioParameter(devDesc->mAddress);
404            param.addInt(String8(AUDIO_PARAMETER_DEVICE_DISCONNECT), device);
405            mpClientInterface->setParameters(AUDIO_IO_HANDLE_NONE, param.toString());
406
407            checkInputsForDevice(device, state, inputs, devDesc->mAddress);
408            mAvailableInputDevices.remove(devDesc);
409
410        } break;
411
412        default:
413            ALOGE("setDeviceConnectionState() invalid state: %x", state);
414            return BAD_VALUE;
415        }
416
417        closeAllInputs();
418
419        if (mPhoneState == AUDIO_MODE_IN_CALL) {
420            audio_devices_t newDevice = getNewOutputDevice(mPrimaryOutput, false /*fromCache*/);
421            updateCallRouting(newDevice);
422        }
423
424        mpClientInterface->onAudioPortListUpdate();
425        return NO_ERROR;
426    } // end if is input device
427
428    ALOGW("setDeviceConnectionState() invalid device: %x", device);
429    return BAD_VALUE;
430}
431
432audio_policy_dev_state_t AudioPolicyManager::getDeviceConnectionState(audio_devices_t device,
433                                                  const char *device_address)
434{
435    sp<DeviceDescriptor> devDesc = getDeviceDescriptor(device, device_address);
436    DeviceVector *deviceVector;
437
438    if (audio_is_output_device(device)) {
439        deviceVector = &mAvailableOutputDevices;
440    } else if (audio_is_input_device(device)) {
441        deviceVector = &mAvailableInputDevices;
442    } else {
443        ALOGW("getDeviceConnectionState() invalid device type %08x", device);
444        return AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE;
445    }
446
447    ssize_t index = deviceVector->indexOf(devDesc);
448    if (index >= 0) {
449        return AUDIO_POLICY_DEVICE_STATE_AVAILABLE;
450    } else {
451        return AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE;
452    }
453}
454
455sp<AudioPolicyManager::DeviceDescriptor>  AudioPolicyManager::getDeviceDescriptor(
456                                                                    const audio_devices_t device,
457                                                                    const char *device_address)
458{
459    String8 address = (device_address == NULL) ? String8("") : String8(device_address);
460    // handle legacy remote submix case where the address was not always specified
461    if (deviceDistinguishesOnAddress(device) && (address.length() == 0)) {
462        address = String8("0");
463    }
464
465    for (size_t i = 0; i < mHwModules.size(); i++) {
466        if (mHwModules[i]->mHandle == 0) {
467            continue;
468        }
469        DeviceVector deviceList =
470                mHwModules[i]->mDeclaredDevices.getDevicesFromTypeAddr(device, address);
471        if (!deviceList.isEmpty()) {
472            return deviceList.itemAt(0);
473        }
474        deviceList = mHwModules[i]->mDeclaredDevices.getDevicesFromType(device);
475        if (!deviceList.isEmpty()) {
476            return deviceList.itemAt(0);
477        }
478    }
479
480    sp<DeviceDescriptor> devDesc = new DeviceDescriptor(String8(""), device);
481    devDesc->mAddress = address;
482    return devDesc;
483}
484
485void AudioPolicyManager::updateCallRouting(audio_devices_t rxDevice, int delayMs)
486{
487    bool createTxPatch = false;
488    struct audio_patch patch;
489    patch.num_sources = 1;
490    patch.num_sinks = 1;
491    status_t status;
492    audio_patch_handle_t afPatchHandle;
493    DeviceVector deviceList;
494
495    audio_devices_t txDevice = getDeviceAndMixForInputSource(AUDIO_SOURCE_VOICE_COMMUNICATION);
496    ALOGV("updateCallRouting device rxDevice %08x txDevice %08x", rxDevice, txDevice);
497
498    // release existing RX patch if any
499    if (mCallRxPatch != 0) {
500        mpClientInterface->releaseAudioPatch(mCallRxPatch->mAfPatchHandle, 0);
501        mCallRxPatch.clear();
502    }
503    // release TX patch if any
504    if (mCallTxPatch != 0) {
505        mpClientInterface->releaseAudioPatch(mCallTxPatch->mAfPatchHandle, 0);
506        mCallTxPatch.clear();
507    }
508
509    // If the RX device is on the primary HW module, then use legacy routing method for voice calls
510    // via setOutputDevice() on primary output.
511    // Otherwise, create two audio patches for TX and RX path.
512    if (availablePrimaryOutputDevices() & rxDevice) {
513        setOutputDevice(mPrimaryOutput, rxDevice, true, delayMs);
514        // If the TX device is also on the primary HW module, setOutputDevice() will take care
515        // of it due to legacy implementation. If not, create a patch.
516        if ((availablePrimaryInputDevices() & txDevice & ~AUDIO_DEVICE_BIT_IN)
517                == AUDIO_DEVICE_NONE) {
518            createTxPatch = true;
519        }
520    } else {
521        // create RX path audio patch
522        deviceList = mAvailableOutputDevices.getDevicesFromType(rxDevice);
523        ALOG_ASSERT(!deviceList.isEmpty(),
524                    "updateCallRouting() selected device not in output device list");
525        sp<DeviceDescriptor> rxSinkDeviceDesc = deviceList.itemAt(0);
526        deviceList = mAvailableInputDevices.getDevicesFromType(AUDIO_DEVICE_IN_TELEPHONY_RX);
527        ALOG_ASSERT(!deviceList.isEmpty(),
528                    "updateCallRouting() no telephony RX device");
529        sp<DeviceDescriptor> rxSourceDeviceDesc = deviceList.itemAt(0);
530
531        rxSourceDeviceDesc->toAudioPortConfig(&patch.sources[0]);
532        rxSinkDeviceDesc->toAudioPortConfig(&patch.sinks[0]);
533
534        // request to reuse existing output stream if one is already opened to reach the RX device
535        SortedVector<audio_io_handle_t> outputs =
536                                getOutputsForDevice(rxDevice, mOutputs);
537        audio_io_handle_t output = selectOutput(outputs,
538                                                AUDIO_OUTPUT_FLAG_NONE,
539                                                AUDIO_FORMAT_INVALID);
540        if (output != AUDIO_IO_HANDLE_NONE) {
541            sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
542            ALOG_ASSERT(!outputDesc->isDuplicated(),
543                        "updateCallRouting() RX device output is duplicated");
544            outputDesc->toAudioPortConfig(&patch.sources[1]);
545            patch.num_sources = 2;
546        }
547
548        afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
549        status = mpClientInterface->createAudioPatch(&patch, &afPatchHandle, 0);
550        ALOGW_IF(status != NO_ERROR, "updateCallRouting() error %d creating RX audio patch",
551                                               status);
552        if (status == NO_ERROR) {
553            mCallRxPatch = new AudioPatch((audio_patch_handle_t)nextUniqueId(),
554                                       &patch, mUidCached);
555            mCallRxPatch->mAfPatchHandle = afPatchHandle;
556            mCallRxPatch->mUid = mUidCached;
557        }
558        createTxPatch = true;
559    }
560    if (createTxPatch) {
561
562        struct audio_patch patch;
563        patch.num_sources = 1;
564        patch.num_sinks = 1;
565        deviceList = mAvailableInputDevices.getDevicesFromType(txDevice);
566        ALOG_ASSERT(!deviceList.isEmpty(),
567                    "updateCallRouting() selected device not in input device list");
568        sp<DeviceDescriptor> txSourceDeviceDesc = deviceList.itemAt(0);
569        txSourceDeviceDesc->toAudioPortConfig(&patch.sources[0]);
570        deviceList = mAvailableOutputDevices.getDevicesFromType(AUDIO_DEVICE_OUT_TELEPHONY_TX);
571        ALOG_ASSERT(!deviceList.isEmpty(),
572                    "updateCallRouting() no telephony TX device");
573        sp<DeviceDescriptor> txSinkDeviceDesc = deviceList.itemAt(0);
574        txSinkDeviceDesc->toAudioPortConfig(&patch.sinks[0]);
575
576        SortedVector<audio_io_handle_t> outputs =
577                                getOutputsForDevice(AUDIO_DEVICE_OUT_TELEPHONY_TX, mOutputs);
578        audio_io_handle_t output = selectOutput(outputs,
579                                                AUDIO_OUTPUT_FLAG_NONE,
580                                                AUDIO_FORMAT_INVALID);
581        // request to reuse existing output stream if one is already opened to reach the TX
582        // path output device
583        if (output != AUDIO_IO_HANDLE_NONE) {
584            sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
585            ALOG_ASSERT(!outputDesc->isDuplicated(),
586                        "updateCallRouting() RX device output is duplicated");
587            outputDesc->toAudioPortConfig(&patch.sources[1]);
588            patch.num_sources = 2;
589        }
590
591        afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
592        status = mpClientInterface->createAudioPatch(&patch, &afPatchHandle, 0);
593        ALOGW_IF(status != NO_ERROR, "setPhoneState() error %d creating TX audio patch",
594                                               status);
595        if (status == NO_ERROR) {
596            mCallTxPatch = new AudioPatch((audio_patch_handle_t)nextUniqueId(),
597                                       &patch, mUidCached);
598            mCallTxPatch->mAfPatchHandle = afPatchHandle;
599            mCallTxPatch->mUid = mUidCached;
600        }
601    }
602}
603
604void AudioPolicyManager::setPhoneState(audio_mode_t state)
605{
606    ALOGV("setPhoneState() state %d", state);
607    if (state < 0 || state >= AUDIO_MODE_CNT) {
608        ALOGW("setPhoneState() invalid state %d", state);
609        return;
610    }
611
612    if (state == mPhoneState ) {
613        ALOGW("setPhoneState() setting same state %d", state);
614        return;
615    }
616
617    // if leaving call state, handle special case of active streams
618    // pertaining to sonification strategy see handleIncallSonification()
619    if (isInCall()) {
620        ALOGV("setPhoneState() in call state management: new state is %d", state);
621        for (int stream = 0; stream < AUDIO_STREAM_CNT; stream++) {
622            if (stream == AUDIO_STREAM_PATCH) {
623                continue;
624            }
625            handleIncallSonification((audio_stream_type_t)stream, false, true);
626        }
627
628        // force reevaluating accessibility routing when call starts
629        mpClientInterface->invalidateStream(AUDIO_STREAM_ACCESSIBILITY);
630    }
631
632    // store previous phone state for management of sonification strategy below
633    int oldState = mPhoneState;
634    mPhoneState = state;
635    bool force = false;
636
637    // are we entering or starting a call
638    if (!isStateInCall(oldState) && isStateInCall(state)) {
639        ALOGV("  Entering call in setPhoneState()");
640        // force routing command to audio hardware when starting a call
641        // even if no device change is needed
642        force = true;
643        for (int j = 0; j < DEVICE_CATEGORY_CNT; j++) {
644            mStreams[AUDIO_STREAM_DTMF].mVolumeCurve[j] =
645                    sVolumeProfiles[AUDIO_STREAM_VOICE_CALL][j];
646        }
647    } else if (isStateInCall(oldState) && !isStateInCall(state)) {
648        ALOGV("  Exiting call in setPhoneState()");
649        // force routing command to audio hardware when exiting a call
650        // even if no device change is needed
651        force = true;
652        for (int j = 0; j < DEVICE_CATEGORY_CNT; j++) {
653            mStreams[AUDIO_STREAM_DTMF].mVolumeCurve[j] =
654                    sVolumeProfiles[AUDIO_STREAM_DTMF][j];
655        }
656    } else if (isStateInCall(state) && (state != oldState)) {
657        ALOGV("  Switching between telephony and VoIP in setPhoneState()");
658        // force routing command to audio hardware when switching between telephony and VoIP
659        // even if no device change is needed
660        force = true;
661    }
662
663    // check for device and output changes triggered by new phone state
664    checkA2dpSuspend();
665    checkOutputForAllStrategies();
666    updateDevicesAndOutputs();
667
668    sp<AudioOutputDescriptor> hwOutputDesc = mOutputs.valueFor(mPrimaryOutput);
669
670    int delayMs = 0;
671    if (isStateInCall(state)) {
672        nsecs_t sysTime = systemTime();
673        for (size_t i = 0; i < mOutputs.size(); i++) {
674            sp<AudioOutputDescriptor> desc = mOutputs.valueAt(i);
675            // mute media and sonification strategies and delay device switch by the largest
676            // latency of any output where either strategy is active.
677            // This avoid sending the ring tone or music tail into the earpiece or headset.
678            if ((desc->isStrategyActive(STRATEGY_MEDIA,
679                                     SONIFICATION_HEADSET_MUSIC_DELAY,
680                                     sysTime) ||
681                    desc->isStrategyActive(STRATEGY_SONIFICATION,
682                                         SONIFICATION_HEADSET_MUSIC_DELAY,
683                                         sysTime)) &&
684                    (delayMs < (int)desc->mLatency*2)) {
685                delayMs = desc->mLatency*2;
686            }
687            setStrategyMute(STRATEGY_MEDIA, true, mOutputs.keyAt(i));
688            setStrategyMute(STRATEGY_MEDIA, false, mOutputs.keyAt(i), MUTE_TIME_MS,
689                getDeviceForStrategy(STRATEGY_MEDIA, true /*fromCache*/));
690            setStrategyMute(STRATEGY_SONIFICATION, true, mOutputs.keyAt(i));
691            setStrategyMute(STRATEGY_SONIFICATION, false, mOutputs.keyAt(i), MUTE_TIME_MS,
692                getDeviceForStrategy(STRATEGY_SONIFICATION, true /*fromCache*/));
693        }
694    }
695
696    // Note that despite the fact that getNewOutputDevice() is called on the primary output,
697    // the device returned is not necessarily reachable via this output
698    audio_devices_t rxDevice = getNewOutputDevice(mPrimaryOutput, false /*fromCache*/);
699    // force routing command to audio hardware when ending call
700    // even if no device change is needed
701    if (isStateInCall(oldState) && rxDevice == AUDIO_DEVICE_NONE) {
702        rxDevice = hwOutputDesc->device();
703    }
704
705    if (state == AUDIO_MODE_IN_CALL) {
706        updateCallRouting(rxDevice, delayMs);
707    } else if (oldState == AUDIO_MODE_IN_CALL) {
708        if (mCallRxPatch != 0) {
709            mpClientInterface->releaseAudioPatch(mCallRxPatch->mAfPatchHandle, 0);
710            mCallRxPatch.clear();
711        }
712        if (mCallTxPatch != 0) {
713            mpClientInterface->releaseAudioPatch(mCallTxPatch->mAfPatchHandle, 0);
714            mCallTxPatch.clear();
715        }
716        setOutputDevice(mPrimaryOutput, rxDevice, force, 0);
717    } else {
718        setOutputDevice(mPrimaryOutput, rxDevice, force, 0);
719    }
720    // if entering in call state, handle special case of active streams
721    // pertaining to sonification strategy see handleIncallSonification()
722    if (isStateInCall(state)) {
723        ALOGV("setPhoneState() in call state management: new state is %d", state);
724        for (int stream = 0; stream < AUDIO_STREAM_CNT; stream++) {
725            if (stream == AUDIO_STREAM_PATCH) {
726                continue;
727            }
728            handleIncallSonification((audio_stream_type_t)stream, true, true);
729        }
730    }
731
732    // Flag that ringtone volume must be limited to music volume until we exit MODE_RINGTONE
733    if (state == AUDIO_MODE_RINGTONE &&
734        isStreamActive(AUDIO_STREAM_MUSIC, SONIFICATION_HEADSET_MUSIC_DELAY)) {
735        mLimitRingtoneVolume = true;
736    } else {
737        mLimitRingtoneVolume = false;
738    }
739}
740
741void AudioPolicyManager::setForceUse(audio_policy_force_use_t usage,
742                                         audio_policy_forced_cfg_t config)
743{
744    ALOGV("setForceUse() usage %d, config %d, mPhoneState %d", usage, config, mPhoneState);
745
746    bool forceVolumeReeval = false;
747    switch(usage) {
748    case AUDIO_POLICY_FORCE_FOR_COMMUNICATION:
749        if (config != AUDIO_POLICY_FORCE_SPEAKER && config != AUDIO_POLICY_FORCE_BT_SCO &&
750            config != AUDIO_POLICY_FORCE_NONE) {
751            ALOGW("setForceUse() invalid config %d for FOR_COMMUNICATION", config);
752            return;
753        }
754        forceVolumeReeval = true;
755        mForceUse[usage] = config;
756        break;
757    case AUDIO_POLICY_FORCE_FOR_MEDIA:
758        if (config != AUDIO_POLICY_FORCE_HEADPHONES && config != AUDIO_POLICY_FORCE_BT_A2DP &&
759            config != AUDIO_POLICY_FORCE_WIRED_ACCESSORY &&
760            config != AUDIO_POLICY_FORCE_ANALOG_DOCK &&
761            config != AUDIO_POLICY_FORCE_DIGITAL_DOCK && config != AUDIO_POLICY_FORCE_NONE &&
762            config != AUDIO_POLICY_FORCE_NO_BT_A2DP && config != AUDIO_POLICY_FORCE_SPEAKER ) {
763            ALOGW("setForceUse() invalid config %d for FOR_MEDIA", config);
764            return;
765        }
766        mForceUse[usage] = config;
767        break;
768    case AUDIO_POLICY_FORCE_FOR_RECORD:
769        if (config != AUDIO_POLICY_FORCE_BT_SCO && config != AUDIO_POLICY_FORCE_WIRED_ACCESSORY &&
770            config != AUDIO_POLICY_FORCE_NONE) {
771            ALOGW("setForceUse() invalid config %d for FOR_RECORD", config);
772            return;
773        }
774        mForceUse[usage] = config;
775        break;
776    case AUDIO_POLICY_FORCE_FOR_DOCK:
777        if (config != AUDIO_POLICY_FORCE_NONE && config != AUDIO_POLICY_FORCE_BT_CAR_DOCK &&
778            config != AUDIO_POLICY_FORCE_BT_DESK_DOCK &&
779            config != AUDIO_POLICY_FORCE_WIRED_ACCESSORY &&
780            config != AUDIO_POLICY_FORCE_ANALOG_DOCK &&
781            config != AUDIO_POLICY_FORCE_DIGITAL_DOCK) {
782            ALOGW("setForceUse() invalid config %d for FOR_DOCK", config);
783        }
784        forceVolumeReeval = true;
785        mForceUse[usage] = config;
786        break;
787    case AUDIO_POLICY_FORCE_FOR_SYSTEM:
788        if (config != AUDIO_POLICY_FORCE_NONE &&
789            config != AUDIO_POLICY_FORCE_SYSTEM_ENFORCED) {
790            ALOGW("setForceUse() invalid config %d for FOR_SYSTEM", config);
791        }
792        forceVolumeReeval = true;
793        mForceUse[usage] = config;
794        break;
795    case AUDIO_POLICY_FORCE_FOR_HDMI_SYSTEM_AUDIO:
796        if (config != AUDIO_POLICY_FORCE_NONE &&
797            config != AUDIO_POLICY_FORCE_HDMI_SYSTEM_AUDIO_ENFORCED) {
798            ALOGW("setForceUse() invalid config %d forHDMI_SYSTEM_AUDIO", config);
799        }
800        mForceUse[usage] = config;
801        break;
802    default:
803        ALOGW("setForceUse() invalid usage %d", usage);
804        break;
805    }
806
807    // check for device and output changes triggered by new force usage
808    checkA2dpSuspend();
809    checkOutputForAllStrategies();
810    updateDevicesAndOutputs();
811    if (mPhoneState == AUDIO_MODE_IN_CALL) {
812        audio_devices_t newDevice = getNewOutputDevice(mPrimaryOutput, true /*fromCache*/);
813        updateCallRouting(newDevice);
814    }
815    for (size_t i = 0; i < mOutputs.size(); i++) {
816        audio_io_handle_t output = mOutputs.keyAt(i);
817        audio_devices_t newDevice = getNewOutputDevice(output, true /*fromCache*/);
818        if ((mPhoneState != AUDIO_MODE_IN_CALL) || (output != mPrimaryOutput)) {
819            setOutputDevice(output, newDevice, (newDevice != AUDIO_DEVICE_NONE));
820        }
821        if (forceVolumeReeval && (newDevice != AUDIO_DEVICE_NONE)) {
822            applyStreamVolumes(output, newDevice, 0, true);
823        }
824    }
825
826    audio_io_handle_t activeInput = getActiveInput();
827    if (activeInput != 0) {
828        setInputDevice(activeInput, getNewInputDevice(activeInput));
829    }
830
831}
832
833audio_policy_forced_cfg_t AudioPolicyManager::getForceUse(audio_policy_force_use_t usage)
834{
835    return mForceUse[usage];
836}
837
838void AudioPolicyManager::setSystemProperty(const char* property, const char* value)
839{
840    ALOGV("setSystemProperty() property %s, value %s", property, value);
841}
842
843// Find a direct output profile compatible with the parameters passed, even if the input flags do
844// not explicitly request a direct output
845sp<AudioPolicyManager::IOProfile> AudioPolicyManager::getProfileForDirectOutput(
846                                                               audio_devices_t device,
847                                                               uint32_t samplingRate,
848                                                               audio_format_t format,
849                                                               audio_channel_mask_t channelMask,
850                                                               audio_output_flags_t flags)
851{
852    for (size_t i = 0; i < mHwModules.size(); i++) {
853        if (mHwModules[i]->mHandle == 0) {
854            continue;
855        }
856        for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++) {
857            sp<IOProfile> profile = mHwModules[i]->mOutputProfiles[j];
858            bool found = profile->isCompatibleProfile(device, String8(""), samplingRate,
859                    NULL /*updatedSamplingRate*/, format, channelMask,
860                    flags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD ?
861                        AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD : AUDIO_OUTPUT_FLAG_DIRECT);
862            if (found && (mAvailableOutputDevices.types() & profile->mSupportedDevices.types())) {
863                return profile;
864            }
865        }
866    }
867    return 0;
868}
869
870audio_io_handle_t AudioPolicyManager::getOutput(audio_stream_type_t stream,
871                                    uint32_t samplingRate,
872                                    audio_format_t format,
873                                    audio_channel_mask_t channelMask,
874                                    audio_output_flags_t flags,
875                                    const audio_offload_info_t *offloadInfo)
876{
877    routing_strategy strategy = getStrategy(stream);
878    audio_devices_t device = getDeviceForStrategy(strategy, false /*fromCache*/);
879    ALOGV("getOutput() device %d, stream %d, samplingRate %d, format %x, channelMask %x, flags %x",
880          device, stream, samplingRate, format, channelMask, flags);
881
882    return getOutputForDevice(device, AUDIO_SESSION_ALLOCATE,
883                              stream, samplingRate,format, channelMask,
884                              flags, offloadInfo);
885}
886
887status_t AudioPolicyManager::getOutputForAttr(const audio_attributes_t *attr,
888                                              audio_io_handle_t *output,
889                                              audio_session_t session,
890                                              audio_stream_type_t *stream,
891                                              uint32_t samplingRate,
892                                              audio_format_t format,
893                                              audio_channel_mask_t channelMask,
894                                              audio_output_flags_t flags,
895                                              const audio_offload_info_t *offloadInfo)
896{
897    audio_attributes_t attributes;
898    if (attr != NULL) {
899        if (!isValidAttributes(attr)) {
900            ALOGE("getOutputForAttr() invalid attributes: usage=%d content=%d flags=0x%x tags=[%s]",
901                  attr->usage, attr->content_type, attr->flags,
902                  attr->tags);
903            return BAD_VALUE;
904        }
905        attributes = *attr;
906    } else {
907        if (*stream < AUDIO_STREAM_MIN || *stream >= AUDIO_STREAM_PUBLIC_CNT) {
908            ALOGE("getOutputForAttr():  invalid stream type");
909            return BAD_VALUE;
910        }
911        stream_type_to_audio_attributes(*stream, &attributes);
912    }
913
914    for (size_t i = 0; i < mPolicyMixes.size(); i++) {
915        sp<AudioOutputDescriptor> desc;
916        if (mPolicyMixes[i]->mMix.mMixType == MIX_TYPE_PLAYERS) {
917            for (size_t j = 0; j < mPolicyMixes[i]->mMix.mCriteria.size(); j++) {
918                if ((RULE_MATCH_ATTRIBUTE_USAGE == mPolicyMixes[i]->mMix.mCriteria[j].mRule &&
919                        mPolicyMixes[i]->mMix.mCriteria[j].mAttr.mUsage == attributes.usage) ||
920                    (RULE_EXCLUDE_ATTRIBUTE_USAGE == mPolicyMixes[i]->mMix.mCriteria[j].mRule &&
921                        mPolicyMixes[i]->mMix.mCriteria[j].mAttr.mUsage != attributes.usage)) {
922                    desc = mPolicyMixes[i]->mOutput;
923                    break;
924                }
925                if (strncmp(attributes.tags, "addr=", strlen("addr=")) == 0 &&
926                        strncmp(attributes.tags + strlen("addr="),
927                                mPolicyMixes[i]->mMix.mRegistrationId.string(),
928                                AUDIO_ATTRIBUTES_TAGS_MAX_SIZE - strlen("addr=") - 1) == 0) {
929                    desc = mPolicyMixes[i]->mOutput;
930                    break;
931                }
932            }
933        } else if (mPolicyMixes[i]->mMix.mMixType == MIX_TYPE_RECORDERS) {
934            if (attributes.usage == AUDIO_USAGE_VIRTUAL_SOURCE &&
935                    strncmp(attributes.tags, "addr=", strlen("addr=")) == 0 &&
936                    strncmp(attributes.tags + strlen("addr="),
937                            mPolicyMixes[i]->mMix.mRegistrationId.string(),
938                            AUDIO_ATTRIBUTES_TAGS_MAX_SIZE - strlen("addr=") - 1) == 0) {
939                desc = mPolicyMixes[i]->mOutput;
940            }
941        }
942        if (desc != 0) {
943            if (!audio_is_linear_pcm(format)) {
944                return BAD_VALUE;
945            }
946            desc->mPolicyMix = &mPolicyMixes[i]->mMix;
947            *stream = streamTypefromAttributesInt(&attributes);
948            *output = desc->mIoHandle;
949            ALOGV("getOutputForAttr() returns output %d", *output);
950            return NO_ERROR;
951        }
952    }
953    if (attributes.usage == AUDIO_USAGE_VIRTUAL_SOURCE) {
954        ALOGW("getOutputForAttr() no policy mix found for usage AUDIO_USAGE_VIRTUAL_SOURCE");
955        return BAD_VALUE;
956    }
957
958    ALOGV("getOutputForAttr() usage=%d, content=%d, tag=%s flags=%08x",
959            attributes.usage, attributes.content_type, attributes.tags, attributes.flags);
960
961    routing_strategy strategy = (routing_strategy) getStrategyForAttr(&attributes);
962    audio_devices_t device = getDeviceForStrategy(strategy, false /*fromCache*/);
963
964    if ((attributes.flags & AUDIO_FLAG_HW_AV_SYNC) != 0) {
965        flags = (audio_output_flags_t)(flags | AUDIO_OUTPUT_FLAG_HW_AV_SYNC);
966    }
967
968    ALOGV("getOutputForAttr() device 0x%x, samplingRate %d, format %x, channelMask %x, flags %x",
969          device, samplingRate, format, channelMask, flags);
970
971    *stream = streamTypefromAttributesInt(&attributes);
972    *output = getOutputForDevice(device, session, *stream,
973                                 samplingRate, format, channelMask,
974                                 flags, offloadInfo);
975    if (*output == AUDIO_IO_HANDLE_NONE) {
976        return INVALID_OPERATION;
977    }
978    return NO_ERROR;
979}
980
981audio_io_handle_t AudioPolicyManager::getOutputForDevice(
982        audio_devices_t device,
983        audio_session_t session __unused,
984        audio_stream_type_t stream,
985        uint32_t samplingRate,
986        audio_format_t format,
987        audio_channel_mask_t channelMask,
988        audio_output_flags_t flags,
989        const audio_offload_info_t *offloadInfo)
990{
991    audio_io_handle_t output = AUDIO_IO_HANDLE_NONE;
992    uint32_t latency = 0;
993    status_t status;
994
995#ifdef AUDIO_POLICY_TEST
996    if (mCurOutput != 0) {
997        ALOGV("getOutput() test output mCurOutput %d, samplingRate %d, format %d, channelMask %x, mDirectOutput %d",
998                mCurOutput, mTestSamplingRate, mTestFormat, mTestChannels, mDirectOutput);
999
1000        if (mTestOutputs[mCurOutput] == 0) {
1001            ALOGV("getOutput() opening test output");
1002            sp<AudioOutputDescriptor> outputDesc = new AudioOutputDescriptor(NULL);
1003            outputDesc->mDevice = mTestDevice;
1004            outputDesc->mLatency = mTestLatencyMs;
1005            outputDesc->mFlags =
1006                    (audio_output_flags_t)(mDirectOutput ? AUDIO_OUTPUT_FLAG_DIRECT : 0);
1007            outputDesc->mRefCount[stream] = 0;
1008            audio_config_t config = AUDIO_CONFIG_INITIALIZER;
1009            config.sample_rate = mTestSamplingRate;
1010            config.channel_mask = mTestChannels;
1011            config.format = mTestFormat;
1012            if (offloadInfo != NULL) {
1013                config.offload_info = *offloadInfo;
1014            }
1015            status = mpClientInterface->openOutput(0,
1016                                                  &mTestOutputs[mCurOutput],
1017                                                  &config,
1018                                                  &outputDesc->mDevice,
1019                                                  String8(""),
1020                                                  &outputDesc->mLatency,
1021                                                  outputDesc->mFlags);
1022            if (status == NO_ERROR) {
1023                outputDesc->mSamplingRate = config.sample_rate;
1024                outputDesc->mFormat = config.format;
1025                outputDesc->mChannelMask = config.channel_mask;
1026                AudioParameter outputCmd = AudioParameter();
1027                outputCmd.addInt(String8("set_id"),mCurOutput);
1028                mpClientInterface->setParameters(mTestOutputs[mCurOutput],outputCmd.toString());
1029                addOutput(mTestOutputs[mCurOutput], outputDesc);
1030            }
1031        }
1032        return mTestOutputs[mCurOutput];
1033    }
1034#endif //AUDIO_POLICY_TEST
1035
1036    // open a direct output if required by specified parameters
1037    //force direct flag if offload flag is set: offloading implies a direct output stream
1038    // and all common behaviors are driven by checking only the direct flag
1039    // this should normally be set appropriately in the policy configuration file
1040    if ((flags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0) {
1041        flags = (audio_output_flags_t)(flags | AUDIO_OUTPUT_FLAG_DIRECT);
1042    }
1043    if ((flags & AUDIO_OUTPUT_FLAG_HW_AV_SYNC) != 0) {
1044        flags = (audio_output_flags_t)(flags | AUDIO_OUTPUT_FLAG_DIRECT);
1045    }
1046    // only allow deep buffering for music stream type
1047    if (stream != AUDIO_STREAM_MUSIC) {
1048        flags = (audio_output_flags_t)(flags &~AUDIO_OUTPUT_FLAG_DEEP_BUFFER);
1049    }
1050
1051    sp<IOProfile> profile;
1052
1053    // skip direct output selection if the request can obviously be attached to a mixed output
1054    // and not explicitly requested
1055    if (((flags & AUDIO_OUTPUT_FLAG_DIRECT) == 0) &&
1056            audio_is_linear_pcm(format) && samplingRate <= MAX_MIXER_SAMPLING_RATE &&
1057            audio_channel_count_from_out_mask(channelMask) <= 2) {
1058        goto non_direct_output;
1059    }
1060
1061    // Do not allow offloading if one non offloadable effect is enabled. This prevents from
1062    // creating an offloaded track and tearing it down immediately after start when audioflinger
1063    // detects there is an active non offloadable effect.
1064    // FIXME: We should check the audio session here but we do not have it in this context.
1065    // This may prevent offloading in rare situations where effects are left active by apps
1066    // in the background.
1067
1068    if (((flags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) == 0) ||
1069            !isNonOffloadableEffectEnabled()) {
1070        profile = getProfileForDirectOutput(device,
1071                                           samplingRate,
1072                                           format,
1073                                           channelMask,
1074                                           (audio_output_flags_t)flags);
1075    }
1076
1077    if (profile != 0) {
1078        sp<AudioOutputDescriptor> outputDesc = NULL;
1079
1080        for (size_t i = 0; i < mOutputs.size(); i++) {
1081            sp<AudioOutputDescriptor> desc = mOutputs.valueAt(i);
1082            if (!desc->isDuplicated() && (profile == desc->mProfile)) {
1083                outputDesc = desc;
1084                // reuse direct output if currently open and configured with same parameters
1085                if ((samplingRate == outputDesc->mSamplingRate) &&
1086                        (format == outputDesc->mFormat) &&
1087                        (channelMask == outputDesc->mChannelMask)) {
1088                    outputDesc->mDirectOpenCount++;
1089                    ALOGV("getOutput() reusing direct output %d", mOutputs.keyAt(i));
1090                    return mOutputs.keyAt(i);
1091                }
1092            }
1093        }
1094        // close direct output if currently open and configured with different parameters
1095        if (outputDesc != NULL) {
1096            closeOutput(outputDesc->mIoHandle);
1097        }
1098        outputDesc = new AudioOutputDescriptor(profile);
1099        outputDesc->mDevice = device;
1100        outputDesc->mLatency = 0;
1101        outputDesc->mFlags =(audio_output_flags_t) (outputDesc->mFlags | flags);
1102        audio_config_t config = AUDIO_CONFIG_INITIALIZER;
1103        config.sample_rate = samplingRate;
1104        config.channel_mask = channelMask;
1105        config.format = format;
1106        if (offloadInfo != NULL) {
1107            config.offload_info = *offloadInfo;
1108        }
1109        status = mpClientInterface->openOutput(profile->mModule->mHandle,
1110                                               &output,
1111                                               &config,
1112                                               &outputDesc->mDevice,
1113                                               String8(""),
1114                                               &outputDesc->mLatency,
1115                                               outputDesc->mFlags);
1116
1117        // only accept an output with the requested parameters
1118        if (status != NO_ERROR ||
1119            (samplingRate != 0 && samplingRate != config.sample_rate) ||
1120            (format != AUDIO_FORMAT_DEFAULT && format != config.format) ||
1121            (channelMask != 0 && channelMask != config.channel_mask)) {
1122            ALOGV("getOutput() failed opening direct output: output %d samplingRate %d %d,"
1123                    "format %d %d, channelMask %04x %04x", output, samplingRate,
1124                    outputDesc->mSamplingRate, format, outputDesc->mFormat, channelMask,
1125                    outputDesc->mChannelMask);
1126            if (output != AUDIO_IO_HANDLE_NONE) {
1127                mpClientInterface->closeOutput(output);
1128            }
1129            // fall back to mixer output if possible when the direct output could not be open
1130            if (audio_is_linear_pcm(format) && samplingRate <= MAX_MIXER_SAMPLING_RATE) {
1131                goto non_direct_output;
1132            }
1133            return AUDIO_IO_HANDLE_NONE;
1134        }
1135        outputDesc->mSamplingRate = config.sample_rate;
1136        outputDesc->mChannelMask = config.channel_mask;
1137        outputDesc->mFormat = config.format;
1138        outputDesc->mRefCount[stream] = 0;
1139        outputDesc->mStopTime[stream] = 0;
1140        outputDesc->mDirectOpenCount = 1;
1141
1142        audio_io_handle_t srcOutput = getOutputForEffect();
1143        addOutput(output, outputDesc);
1144        audio_io_handle_t dstOutput = getOutputForEffect();
1145        if (dstOutput == output) {
1146            mpClientInterface->moveEffects(AUDIO_SESSION_OUTPUT_MIX, srcOutput, dstOutput);
1147        }
1148        mPreviousOutputs = mOutputs;
1149        ALOGV("getOutput() returns new direct output %d", output);
1150        mpClientInterface->onAudioPortListUpdate();
1151        return output;
1152    }
1153
1154non_direct_output:
1155
1156    // ignoring channel mask due to downmix capability in mixer
1157
1158    // open a non direct output
1159
1160    // for non direct outputs, only PCM is supported
1161    if (audio_is_linear_pcm(format)) {
1162        // get which output is suitable for the specified stream. The actual
1163        // routing change will happen when startOutput() will be called
1164        SortedVector<audio_io_handle_t> outputs = getOutputsForDevice(device, mOutputs);
1165
1166        // at this stage we should ignore the DIRECT flag as no direct output could be found earlier
1167        flags = (audio_output_flags_t)(flags & ~AUDIO_OUTPUT_FLAG_DIRECT);
1168        output = selectOutput(outputs, flags, format);
1169    }
1170    ALOGW_IF((output == 0), "getOutput() could not find output for stream %d, samplingRate %d,"
1171            "format %d, channels %x, flags %x", stream, samplingRate, format, channelMask, flags);
1172
1173    ALOGV("getOutput() returns output %d", output);
1174
1175    return output;
1176}
1177
1178audio_io_handle_t AudioPolicyManager::selectOutput(const SortedVector<audio_io_handle_t>& outputs,
1179                                                       audio_output_flags_t flags,
1180                                                       audio_format_t format)
1181{
1182    // select one output among several that provide a path to a particular device or set of
1183    // devices (the list was previously build by getOutputsForDevice()).
1184    // The priority is as follows:
1185    // 1: the output with the highest number of requested policy flags
1186    // 2: the primary output
1187    // 3: the first output in the list
1188
1189    if (outputs.size() == 0) {
1190        return 0;
1191    }
1192    if (outputs.size() == 1) {
1193        return outputs[0];
1194    }
1195
1196    int maxCommonFlags = 0;
1197    audio_io_handle_t outputFlags = 0;
1198    audio_io_handle_t outputPrimary = 0;
1199
1200    for (size_t i = 0; i < outputs.size(); i++) {
1201        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(outputs[i]);
1202        if (!outputDesc->isDuplicated()) {
1203            // if a valid format is specified, skip output if not compatible
1204            if (format != AUDIO_FORMAT_INVALID) {
1205                if (outputDesc->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) {
1206                    if (format != outputDesc->mFormat) {
1207                        continue;
1208                    }
1209                } else if (!audio_is_linear_pcm(format)) {
1210                    continue;
1211                }
1212            }
1213
1214            int commonFlags = popcount(outputDesc->mProfile->mFlags & flags);
1215            if (commonFlags > maxCommonFlags) {
1216                outputFlags = outputs[i];
1217                maxCommonFlags = commonFlags;
1218                ALOGV("selectOutput() commonFlags for output %d, %04x", outputs[i], commonFlags);
1219            }
1220            if (outputDesc->mProfile->mFlags & AUDIO_OUTPUT_FLAG_PRIMARY) {
1221                outputPrimary = outputs[i];
1222            }
1223        }
1224    }
1225
1226    if (outputFlags != 0) {
1227        return outputFlags;
1228    }
1229    if (outputPrimary != 0) {
1230        return outputPrimary;
1231    }
1232
1233    return outputs[0];
1234}
1235
1236status_t AudioPolicyManager::startOutput(audio_io_handle_t output,
1237                                             audio_stream_type_t stream,
1238                                             audio_session_t session)
1239{
1240    ALOGV("startOutput() output %d, stream %d, session %d", output, stream, session);
1241    ssize_t index = mOutputs.indexOfKey(output);
1242    if (index < 0) {
1243        ALOGW("startOutput() unknown output %d", output);
1244        return BAD_VALUE;
1245    }
1246
1247    // cannot start playback of STREAM_TTS if any other output is being used
1248    uint32_t beaconMuteLatency = 0;
1249    if (stream == AUDIO_STREAM_TTS) {
1250        ALOGV("\t found BEACON stream");
1251        if (isAnyOutputActive(AUDIO_STREAM_TTS /*streamToIgnore*/)) {
1252            return INVALID_OPERATION;
1253        } else {
1254            beaconMuteLatency = handleEventForBeacon(STARTING_BEACON);
1255        }
1256    } else {
1257        // some playback other than beacon starts
1258        beaconMuteLatency = handleEventForBeacon(STARTING_OUTPUT);
1259    }
1260
1261    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(index);
1262
1263    // increment usage count for this stream on the requested output:
1264    // NOTE that the usage count is the same for duplicated output and hardware output which is
1265    // necessary for a correct control of hardware output routing by startOutput() and stopOutput()
1266    outputDesc->changeRefCount(stream, 1);
1267
1268    if (outputDesc->mRefCount[stream] == 1) {
1269        // starting an output being rerouted?
1270        audio_devices_t newDevice;
1271        if (outputDesc->mPolicyMix != NULL) {
1272            newDevice = AUDIO_DEVICE_OUT_REMOTE_SUBMIX;
1273        } else {
1274            newDevice = getNewOutputDevice(output, false /*fromCache*/);
1275        }
1276        routing_strategy strategy = getStrategy(stream);
1277        bool shouldWait = (strategy == STRATEGY_SONIFICATION) ||
1278                            (strategy == STRATEGY_SONIFICATION_RESPECTFUL) ||
1279                            (beaconMuteLatency > 0);
1280        uint32_t waitMs = beaconMuteLatency;
1281        bool force = false;
1282        for (size_t i = 0; i < mOutputs.size(); i++) {
1283            sp<AudioOutputDescriptor> desc = mOutputs.valueAt(i);
1284            if (desc != outputDesc) {
1285                // force a device change if any other output is managed by the same hw
1286                // module and has a current device selection that differs from selected device.
1287                // In this case, the audio HAL must receive the new device selection so that it can
1288                // change the device currently selected by the other active output.
1289                if (outputDesc->sharesHwModuleWith(desc) &&
1290                    desc->device() != newDevice) {
1291                    force = true;
1292                }
1293                // wait for audio on other active outputs to be presented when starting
1294                // a notification so that audio focus effect can propagate, or that a mute/unmute
1295                // event occurred for beacon
1296                uint32_t latency = desc->latency();
1297                if (shouldWait && desc->isActive(latency * 2) && (waitMs < latency)) {
1298                    waitMs = latency;
1299                }
1300            }
1301        }
1302        uint32_t muteWaitMs = setOutputDevice(output, newDevice, force);
1303
1304        // handle special case for sonification while in call
1305        if (isInCall()) {
1306            handleIncallSonification(stream, true, false);
1307        }
1308
1309        // apply volume rules for current stream and device if necessary
1310        checkAndSetVolume(stream,
1311                          mStreams[stream].getVolumeIndex(newDevice),
1312                          output,
1313                          newDevice);
1314
1315        // update the outputs if starting an output with a stream that can affect notification
1316        // routing
1317        handleNotificationRoutingForStream(stream);
1318
1319        // Automatically enable the remote submix input when output is started on a re routing mix
1320        // of type MIX_TYPE_RECORDERS
1321        if (audio_is_remote_submix_device(newDevice) && outputDesc->mPolicyMix != NULL &&
1322                outputDesc->mPolicyMix->mMixType == MIX_TYPE_RECORDERS) {
1323                setDeviceConnectionStateInt(AUDIO_DEVICE_IN_REMOTE_SUBMIX,
1324                        AUDIO_POLICY_DEVICE_STATE_AVAILABLE,
1325                        outputDesc->mPolicyMix->mRegistrationId);
1326        }
1327
1328        // force reevaluating accessibility routing when ringtone or alarm starts
1329        if (strategy == STRATEGY_SONIFICATION) {
1330            mpClientInterface->invalidateStream(AUDIO_STREAM_ACCESSIBILITY);
1331        }
1332
1333        if (waitMs > muteWaitMs) {
1334            usleep((waitMs - muteWaitMs) * 2 * 1000);
1335        }
1336    }
1337    return NO_ERROR;
1338}
1339
1340
1341status_t AudioPolicyManager::stopOutput(audio_io_handle_t output,
1342                                            audio_stream_type_t stream,
1343                                            audio_session_t session)
1344{
1345    ALOGV("stopOutput() output %d, stream %d, session %d", output, stream, session);
1346    ssize_t index = mOutputs.indexOfKey(output);
1347    if (index < 0) {
1348        ALOGW("stopOutput() unknown output %d", output);
1349        return BAD_VALUE;
1350    }
1351
1352    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(index);
1353
1354    // always handle stream stop, check which stream type is stopping
1355    handleEventForBeacon(stream == AUDIO_STREAM_TTS ? STOPPING_BEACON : STOPPING_OUTPUT);
1356
1357    // handle special case for sonification while in call
1358    if (isInCall()) {
1359        handleIncallSonification(stream, false, false);
1360    }
1361
1362    if (outputDesc->mRefCount[stream] > 0) {
1363        // decrement usage count of this stream on the output
1364        outputDesc->changeRefCount(stream, -1);
1365        // store time at which the stream was stopped - see isStreamActive()
1366        if (outputDesc->mRefCount[stream] == 0) {
1367            // Automatically disable the remote submix input when output is stopped on a
1368            // re routing mix of type MIX_TYPE_RECORDERS
1369            if (audio_is_remote_submix_device(outputDesc->mDevice) &&
1370                    outputDesc->mPolicyMix != NULL &&
1371                    outputDesc->mPolicyMix->mMixType == MIX_TYPE_RECORDERS) {
1372                setDeviceConnectionStateInt(AUDIO_DEVICE_IN_REMOTE_SUBMIX,
1373                        AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE,
1374                        outputDesc->mPolicyMix->mRegistrationId);
1375            }
1376
1377            outputDesc->mStopTime[stream] = systemTime();
1378            audio_devices_t newDevice = getNewOutputDevice(output, false /*fromCache*/);
1379            // delay the device switch by twice the latency because stopOutput() is executed when
1380            // the track stop() command is received and at that time the audio track buffer can
1381            // still contain data that needs to be drained. The latency only covers the audio HAL
1382            // and kernel buffers. Also the latency does not always include additional delay in the
1383            // audio path (audio DSP, CODEC ...)
1384            setOutputDevice(output, newDevice, false, outputDesc->mLatency*2);
1385
1386            // force restoring the device selection on other active outputs if it differs from the
1387            // one being selected for this output
1388            for (size_t i = 0; i < mOutputs.size(); i++) {
1389                audio_io_handle_t curOutput = mOutputs.keyAt(i);
1390                sp<AudioOutputDescriptor> desc = mOutputs.valueAt(i);
1391                if (curOutput != output &&
1392                        desc->isActive() &&
1393                        outputDesc->sharesHwModuleWith(desc) &&
1394                        (newDevice != desc->device())) {
1395                    setOutputDevice(curOutput,
1396                                    getNewOutputDevice(curOutput, false /*fromCache*/),
1397                                    true,
1398                                    outputDesc->mLatency*2);
1399                }
1400            }
1401            // update the outputs if stopping one with a stream that can affect notification routing
1402            handleNotificationRoutingForStream(stream);
1403        }
1404        return NO_ERROR;
1405    } else {
1406        ALOGW("stopOutput() refcount is already 0 for output %d", output);
1407        return INVALID_OPERATION;
1408    }
1409}
1410
1411void AudioPolicyManager::releaseOutput(audio_io_handle_t output,
1412                                       audio_stream_type_t stream __unused,
1413                                       audio_session_t session __unused)
1414{
1415    ALOGV("releaseOutput() %d", output);
1416    ssize_t index = mOutputs.indexOfKey(output);
1417    if (index < 0) {
1418        ALOGW("releaseOutput() releasing unknown output %d", output);
1419        return;
1420    }
1421
1422#ifdef AUDIO_POLICY_TEST
1423    int testIndex = testOutputIndex(output);
1424    if (testIndex != 0) {
1425        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(index);
1426        if (outputDesc->isActive()) {
1427            mpClientInterface->closeOutput(output);
1428            mOutputs.removeItem(output);
1429            mTestOutputs[testIndex] = 0;
1430        }
1431        return;
1432    }
1433#endif //AUDIO_POLICY_TEST
1434
1435    sp<AudioOutputDescriptor> desc = mOutputs.valueAt(index);
1436    if (desc->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) {
1437        if (desc->mDirectOpenCount <= 0) {
1438            ALOGW("releaseOutput() invalid open count %d for output %d",
1439                                                              desc->mDirectOpenCount, output);
1440            return;
1441        }
1442        if (--desc->mDirectOpenCount == 0) {
1443            closeOutput(output);
1444            // If effects where present on the output, audioflinger moved them to the primary
1445            // output by default: move them back to the appropriate output.
1446            audio_io_handle_t dstOutput = getOutputForEffect();
1447            if (dstOutput != mPrimaryOutput) {
1448                mpClientInterface->moveEffects(AUDIO_SESSION_OUTPUT_MIX, mPrimaryOutput, dstOutput);
1449            }
1450            mpClientInterface->onAudioPortListUpdate();
1451        }
1452    }
1453}
1454
1455
1456status_t AudioPolicyManager::getInputForAttr(const audio_attributes_t *attr,
1457                                             audio_io_handle_t *input,
1458                                             audio_session_t session,
1459                                             uint32_t samplingRate,
1460                                             audio_format_t format,
1461                                             audio_channel_mask_t channelMask,
1462                                             audio_input_flags_t flags,
1463                                             input_type_t *inputType)
1464{
1465    ALOGV("getInputForAttr() source %d, samplingRate %d, format %d, channelMask %x,"
1466            "session %d, flags %#x",
1467          attr->source, samplingRate, format, channelMask, session, flags);
1468
1469    *input = AUDIO_IO_HANDLE_NONE;
1470    *inputType = API_INPUT_INVALID;
1471    audio_devices_t device;
1472    // handle legacy remote submix case where the address was not always specified
1473    String8 address = String8("");
1474    bool isSoundTrigger = false;
1475    audio_source_t inputSource = attr->source;
1476    audio_source_t halInputSource;
1477    AudioMix *policyMix = NULL;
1478
1479    if (inputSource == AUDIO_SOURCE_DEFAULT) {
1480        inputSource = AUDIO_SOURCE_MIC;
1481    }
1482    halInputSource = inputSource;
1483
1484    if (inputSource == AUDIO_SOURCE_REMOTE_SUBMIX &&
1485            strncmp(attr->tags, "addr=", strlen("addr=")) == 0) {
1486        device = AUDIO_DEVICE_IN_REMOTE_SUBMIX;
1487        address = String8(attr->tags + strlen("addr="));
1488        ssize_t index = mPolicyMixes.indexOfKey(address);
1489        if (index < 0) {
1490            ALOGW("getInputForAttr() no policy for address %s", address.string());
1491            return BAD_VALUE;
1492        }
1493        if (mPolicyMixes[index]->mMix.mMixType != MIX_TYPE_PLAYERS) {
1494            ALOGW("getInputForAttr() bad policy mix type for address %s", address.string());
1495            return BAD_VALUE;
1496        }
1497        policyMix = &mPolicyMixes[index]->mMix;
1498        *inputType = API_INPUT_MIX_EXT_POLICY_REROUTE;
1499    } else {
1500        device = getDeviceAndMixForInputSource(inputSource, &policyMix);
1501        if (device == AUDIO_DEVICE_NONE) {
1502            ALOGW("getInputForAttr() could not find device for source %d", inputSource);
1503            return BAD_VALUE;
1504        }
1505        if (policyMix != NULL) {
1506            address = policyMix->mRegistrationId;
1507            if (policyMix->mMixType == MIX_TYPE_RECORDERS) {
1508                // there is an external policy, but this input is attached to a mix of recorders,
1509                // meaning it receives audio injected into the framework, so the recorder doesn't
1510                // know about it and is therefore considered "legacy"
1511                *inputType = API_INPUT_LEGACY;
1512            } else {
1513                // recording a mix of players defined by an external policy, we're rerouting for
1514                // an external policy
1515                *inputType = API_INPUT_MIX_EXT_POLICY_REROUTE;
1516            }
1517        } else if (audio_is_remote_submix_device(device)) {
1518            address = String8("0");
1519            *inputType = API_INPUT_MIX_CAPTURE;
1520        } else {
1521            *inputType = API_INPUT_LEGACY;
1522        }
1523        // adapt channel selection to input source
1524        switch (inputSource) {
1525        case AUDIO_SOURCE_VOICE_UPLINK:
1526            channelMask = AUDIO_CHANNEL_IN_VOICE_UPLINK;
1527            break;
1528        case AUDIO_SOURCE_VOICE_DOWNLINK:
1529            channelMask = AUDIO_CHANNEL_IN_VOICE_DNLINK;
1530            break;
1531        case AUDIO_SOURCE_VOICE_CALL:
1532            channelMask = AUDIO_CHANNEL_IN_VOICE_UPLINK | AUDIO_CHANNEL_IN_VOICE_DNLINK;
1533            break;
1534        default:
1535            break;
1536        }
1537        if (inputSource == AUDIO_SOURCE_HOTWORD) {
1538            ssize_t index = mSoundTriggerSessions.indexOfKey(session);
1539            if (index >= 0) {
1540                *input = mSoundTriggerSessions.valueFor(session);
1541                isSoundTrigger = true;
1542                flags = (audio_input_flags_t)(flags | AUDIO_INPUT_FLAG_HW_HOTWORD);
1543                ALOGV("SoundTrigger capture on session %d input %d", session, *input);
1544            } else {
1545                halInputSource = AUDIO_SOURCE_VOICE_RECOGNITION;
1546            }
1547        }
1548    }
1549
1550    sp<IOProfile> profile = getInputProfile(device, address,
1551                                            samplingRate, format, channelMask,
1552                                            flags);
1553    if (profile == 0) {
1554        //retry without flags
1555        audio_input_flags_t log_flags = flags;
1556        flags = AUDIO_INPUT_FLAG_NONE;
1557        profile = getInputProfile(device, address,
1558                                  samplingRate, format, channelMask,
1559                                  flags);
1560        if (profile == 0) {
1561            ALOGW("getInputForAttr() could not find profile for device 0x%X, samplingRate %u,"
1562                    "format %#x, channelMask 0x%X, flags %#x",
1563                    device, samplingRate, format, channelMask, log_flags);
1564            return BAD_VALUE;
1565        }
1566    }
1567
1568    if (profile->mModule->mHandle == 0) {
1569        ALOGE("getInputForAttr(): HW module %s not opened", profile->mModule->mName);
1570        return NO_INIT;
1571    }
1572
1573    audio_config_t config = AUDIO_CONFIG_INITIALIZER;
1574    config.sample_rate = samplingRate;
1575    config.channel_mask = channelMask;
1576    config.format = format;
1577
1578    status_t status = mpClientInterface->openInput(profile->mModule->mHandle,
1579                                                   input,
1580                                                   &config,
1581                                                   &device,
1582                                                   address,
1583                                                   halInputSource,
1584                                                   flags);
1585
1586    // only accept input with the exact requested set of parameters
1587    if (status != NO_ERROR || *input == AUDIO_IO_HANDLE_NONE ||
1588        (samplingRate != config.sample_rate) ||
1589        (format != config.format) ||
1590        (channelMask != config.channel_mask)) {
1591        ALOGW("getInputForAttr() failed opening input: samplingRate %d, format %d, channelMask %x",
1592                samplingRate, format, channelMask);
1593        if (*input != AUDIO_IO_HANDLE_NONE) {
1594            mpClientInterface->closeInput(*input);
1595        }
1596        return BAD_VALUE;
1597    }
1598
1599    sp<AudioInputDescriptor> inputDesc = new AudioInputDescriptor(profile);
1600    inputDesc->mInputSource = inputSource;
1601    inputDesc->mRefCount = 0;
1602    inputDesc->mOpenRefCount = 1;
1603    inputDesc->mSamplingRate = samplingRate;
1604    inputDesc->mFormat = format;
1605    inputDesc->mChannelMask = channelMask;
1606    inputDesc->mDevice = device;
1607    inputDesc->mSessions.add(session);
1608    inputDesc->mIsSoundTrigger = isSoundTrigger;
1609    inputDesc->mPolicyMix = policyMix;
1610
1611    ALOGV("getInputForAttr() returns input type = %d", inputType);
1612
1613    addInput(*input, inputDesc);
1614    mpClientInterface->onAudioPortListUpdate();
1615    return NO_ERROR;
1616}
1617
1618status_t AudioPolicyManager::startInput(audio_io_handle_t input,
1619                                        audio_session_t session)
1620{
1621    ALOGV("startInput() input %d", input);
1622    ssize_t index = mInputs.indexOfKey(input);
1623    if (index < 0) {
1624        ALOGW("startInput() unknown input %d", input);
1625        return BAD_VALUE;
1626    }
1627    sp<AudioInputDescriptor> inputDesc = mInputs.valueAt(index);
1628
1629    index = inputDesc->mSessions.indexOf(session);
1630    if (index < 0) {
1631        ALOGW("startInput() unknown session %d on input %d", session, input);
1632        return BAD_VALUE;
1633    }
1634
1635    // virtual input devices are compatible with other input devices
1636    if (!isVirtualInputDevice(inputDesc->mDevice)) {
1637
1638        // for a non-virtual input device, check if there is another (non-virtual) active input
1639        audio_io_handle_t activeInput = getActiveInput();
1640        if (activeInput != 0 && activeInput != input) {
1641
1642            // If the already active input uses AUDIO_SOURCE_HOTWORD then it is closed,
1643            // otherwise the active input continues and the new input cannot be started.
1644            sp<AudioInputDescriptor> activeDesc = mInputs.valueFor(activeInput);
1645            if (activeDesc->mInputSource == AUDIO_SOURCE_HOTWORD) {
1646                ALOGW("startInput(%d) preempting low-priority input %d", input, activeInput);
1647                stopInput(activeInput, activeDesc->mSessions.itemAt(0));
1648                releaseInput(activeInput, activeDesc->mSessions.itemAt(0));
1649            } else {
1650                ALOGE("startInput(%d) failed: other input %d already started", input, activeInput);
1651                return INVALID_OPERATION;
1652            }
1653        }
1654    }
1655
1656    if (inputDesc->mRefCount == 0) {
1657        if (activeInputsCount() == 0) {
1658            SoundTrigger::setCaptureState(true);
1659        }
1660        setInputDevice(input, getNewInputDevice(input), true /* force */);
1661
1662        // automatically enable the remote submix output when input is started if not
1663        // used by a policy mix of type MIX_TYPE_RECORDERS
1664        // For remote submix (a virtual device), we open only one input per capture request.
1665        if (audio_is_remote_submix_device(inputDesc->mDevice)) {
1666            String8 address = String8("");
1667            if (inputDesc->mPolicyMix == NULL) {
1668                address = String8("0");
1669            } else if (inputDesc->mPolicyMix->mMixType == MIX_TYPE_PLAYERS) {
1670                address = inputDesc->mPolicyMix->mRegistrationId;
1671            }
1672            if (address != "") {
1673                setDeviceConnectionStateInt(AUDIO_DEVICE_OUT_REMOTE_SUBMIX,
1674                        AUDIO_POLICY_DEVICE_STATE_AVAILABLE,
1675                        address);
1676            }
1677        }
1678    }
1679
1680    ALOGV("AudioPolicyManager::startInput() input source = %d", inputDesc->mInputSource);
1681
1682    inputDesc->mRefCount++;
1683    return NO_ERROR;
1684}
1685
1686status_t AudioPolicyManager::stopInput(audio_io_handle_t input,
1687                                       audio_session_t session)
1688{
1689    ALOGV("stopInput() input %d", input);
1690    ssize_t index = mInputs.indexOfKey(input);
1691    if (index < 0) {
1692        ALOGW("stopInput() unknown input %d", input);
1693        return BAD_VALUE;
1694    }
1695    sp<AudioInputDescriptor> inputDesc = mInputs.valueAt(index);
1696
1697    index = inputDesc->mSessions.indexOf(session);
1698    if (index < 0) {
1699        ALOGW("stopInput() unknown session %d on input %d", session, input);
1700        return BAD_VALUE;
1701    }
1702
1703    if (inputDesc->mRefCount == 0) {
1704        ALOGW("stopInput() input %d already stopped", input);
1705        return INVALID_OPERATION;
1706    }
1707
1708    inputDesc->mRefCount--;
1709    if (inputDesc->mRefCount == 0) {
1710
1711        // automatically disable the remote submix output when input is stopped if not
1712        // used by a policy mix of type MIX_TYPE_RECORDERS
1713        if (audio_is_remote_submix_device(inputDesc->mDevice)) {
1714            String8 address = String8("");
1715            if (inputDesc->mPolicyMix == NULL) {
1716                address = String8("0");
1717            } else if (inputDesc->mPolicyMix->mMixType == MIX_TYPE_PLAYERS) {
1718                address = inputDesc->mPolicyMix->mRegistrationId;
1719            }
1720            if (address != "") {
1721                setDeviceConnectionStateInt(AUDIO_DEVICE_OUT_REMOTE_SUBMIX,
1722                                         AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE,
1723                                         address);
1724            }
1725        }
1726
1727        resetInputDevice(input);
1728
1729        if (activeInputsCount() == 0) {
1730            SoundTrigger::setCaptureState(false);
1731        }
1732    }
1733    return NO_ERROR;
1734}
1735
1736void AudioPolicyManager::releaseInput(audio_io_handle_t input,
1737                                      audio_session_t session)
1738{
1739    ALOGV("releaseInput() %d", input);
1740    ssize_t index = mInputs.indexOfKey(input);
1741    if (index < 0) {
1742        ALOGW("releaseInput() releasing unknown input %d", input);
1743        return;
1744    }
1745    sp<AudioInputDescriptor> inputDesc = mInputs.valueAt(index);
1746    ALOG_ASSERT(inputDesc != 0);
1747
1748    index = inputDesc->mSessions.indexOf(session);
1749    if (index < 0) {
1750        ALOGW("releaseInput() unknown session %d on input %d", session, input);
1751        return;
1752    }
1753    inputDesc->mSessions.remove(session);
1754    if (inputDesc->mOpenRefCount == 0) {
1755        ALOGW("releaseInput() invalid open ref count %d", inputDesc->mOpenRefCount);
1756        return;
1757    }
1758    inputDesc->mOpenRefCount--;
1759    if (inputDesc->mOpenRefCount > 0) {
1760        ALOGV("releaseInput() exit > 0");
1761        return;
1762    }
1763
1764    closeInput(input);
1765    mpClientInterface->onAudioPortListUpdate();
1766    ALOGV("releaseInput() exit");
1767}
1768
1769void AudioPolicyManager::closeAllInputs() {
1770    bool patchRemoved = false;
1771
1772    for(size_t input_index = 0; input_index < mInputs.size(); input_index++) {
1773        sp<AudioInputDescriptor> inputDesc = mInputs.valueAt(input_index);
1774        ssize_t patch_index = mAudioPatches.indexOfKey(inputDesc->mPatchHandle);
1775        if (patch_index >= 0) {
1776            sp<AudioPatch> patchDesc = mAudioPatches.valueAt(patch_index);
1777            status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, 0);
1778            mAudioPatches.removeItemsAt(patch_index);
1779            patchRemoved = true;
1780        }
1781        mpClientInterface->closeInput(mInputs.keyAt(input_index));
1782    }
1783    mInputs.clear();
1784    nextAudioPortGeneration();
1785
1786    if (patchRemoved) {
1787        mpClientInterface->onAudioPatchListUpdate();
1788    }
1789}
1790
1791void AudioPolicyManager::initStreamVolume(audio_stream_type_t stream,
1792                                            int indexMin,
1793                                            int indexMax)
1794{
1795    ALOGV("initStreamVolume() stream %d, min %d, max %d", stream , indexMin, indexMax);
1796    if (indexMin < 0 || indexMin >= indexMax) {
1797        ALOGW("initStreamVolume() invalid index limits for stream %d, min %d, max %d", stream , indexMin, indexMax);
1798        return;
1799    }
1800    mStreams[stream].mIndexMin = indexMin;
1801    mStreams[stream].mIndexMax = indexMax;
1802    //FIXME: AUDIO_STREAM_ACCESSIBILITY volume follows AUDIO_STREAM_MUSIC for now
1803    if (stream == AUDIO_STREAM_MUSIC) {
1804        mStreams[AUDIO_STREAM_ACCESSIBILITY].mIndexMin = indexMin;
1805        mStreams[AUDIO_STREAM_ACCESSIBILITY].mIndexMax = indexMax;
1806    }
1807}
1808
1809status_t AudioPolicyManager::setStreamVolumeIndex(audio_stream_type_t stream,
1810                                                      int index,
1811                                                      audio_devices_t device)
1812{
1813
1814    if ((index < mStreams[stream].mIndexMin) || (index > mStreams[stream].mIndexMax)) {
1815        return BAD_VALUE;
1816    }
1817    if (!audio_is_output_device(device)) {
1818        return BAD_VALUE;
1819    }
1820
1821    // Force max volume if stream cannot be muted
1822    if (!mStreams[stream].mCanBeMuted) index = mStreams[stream].mIndexMax;
1823
1824    ALOGV("setStreamVolumeIndex() stream %d, device %04x, index %d",
1825          stream, device, index);
1826
1827    // if device is AUDIO_DEVICE_OUT_DEFAULT set default value and
1828    // clear all device specific values
1829    if (device == AUDIO_DEVICE_OUT_DEFAULT) {
1830        mStreams[stream].mIndexCur.clear();
1831    }
1832    mStreams[stream].mIndexCur.add(device, index);
1833
1834    // update volume on all outputs whose current device is also selected by the same
1835    // strategy as the device specified by the caller
1836    audio_devices_t strategyDevice = getDeviceForStrategy(getStrategy(stream), true /*fromCache*/);
1837
1838
1839    //FIXME: AUDIO_STREAM_ACCESSIBILITY volume follows AUDIO_STREAM_MUSIC for now
1840    audio_devices_t accessibilityDevice = AUDIO_DEVICE_NONE;
1841    if (stream == AUDIO_STREAM_MUSIC) {
1842        mStreams[AUDIO_STREAM_ACCESSIBILITY].mIndexCur.add(device, index);
1843        accessibilityDevice = getDeviceForStrategy(STRATEGY_ACCESSIBILITY, true /*fromCache*/);
1844    }
1845    if ((device != AUDIO_DEVICE_OUT_DEFAULT) &&
1846            (device & (strategyDevice | accessibilityDevice)) == 0) {
1847        return NO_ERROR;
1848    }
1849    status_t status = NO_ERROR;
1850    for (size_t i = 0; i < mOutputs.size(); i++) {
1851        audio_devices_t curDevice =
1852                getDeviceForVolume(mOutputs.valueAt(i)->device());
1853        if ((device == AUDIO_DEVICE_OUT_DEFAULT) || ((curDevice & strategyDevice) != 0)) {
1854            status_t volStatus = checkAndSetVolume(stream, index, mOutputs.keyAt(i), curDevice);
1855            if (volStatus != NO_ERROR) {
1856                status = volStatus;
1857            }
1858        }
1859        if ((device == AUDIO_DEVICE_OUT_DEFAULT) || ((curDevice & accessibilityDevice) != 0)) {
1860            status_t volStatus = checkAndSetVolume(AUDIO_STREAM_ACCESSIBILITY,
1861                                                   index, mOutputs.keyAt(i), curDevice);
1862        }
1863    }
1864    return status;
1865}
1866
1867status_t AudioPolicyManager::getStreamVolumeIndex(audio_stream_type_t stream,
1868                                                      int *index,
1869                                                      audio_devices_t device)
1870{
1871    if (index == NULL) {
1872        return BAD_VALUE;
1873    }
1874    if (!audio_is_output_device(device)) {
1875        return BAD_VALUE;
1876    }
1877    // if device is AUDIO_DEVICE_OUT_DEFAULT, return volume for device corresponding to
1878    // the strategy the stream belongs to.
1879    if (device == AUDIO_DEVICE_OUT_DEFAULT) {
1880        device = getDeviceForStrategy(getStrategy(stream), true /*fromCache*/);
1881    }
1882    device = getDeviceForVolume(device);
1883
1884    *index =  mStreams[stream].getVolumeIndex(device);
1885    ALOGV("getStreamVolumeIndex() stream %d device %08x index %d", stream, device, *index);
1886    return NO_ERROR;
1887}
1888
1889audio_io_handle_t AudioPolicyManager::selectOutputForEffects(
1890                                            const SortedVector<audio_io_handle_t>& outputs)
1891{
1892    // select one output among several suitable for global effects.
1893    // The priority is as follows:
1894    // 1: An offloaded output. If the effect ends up not being offloadable,
1895    //    AudioFlinger will invalidate the track and the offloaded output
1896    //    will be closed causing the effect to be moved to a PCM output.
1897    // 2: A deep buffer output
1898    // 3: the first output in the list
1899
1900    if (outputs.size() == 0) {
1901        return 0;
1902    }
1903
1904    audio_io_handle_t outputOffloaded = 0;
1905    audio_io_handle_t outputDeepBuffer = 0;
1906
1907    for (size_t i = 0; i < outputs.size(); i++) {
1908        sp<AudioOutputDescriptor> desc = mOutputs.valueFor(outputs[i]);
1909        ALOGV("selectOutputForEffects outputs[%zu] flags %x", i, desc->mFlags);
1910        if ((desc->mFlags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0) {
1911            outputOffloaded = outputs[i];
1912        }
1913        if ((desc->mFlags & AUDIO_OUTPUT_FLAG_DEEP_BUFFER) != 0) {
1914            outputDeepBuffer = outputs[i];
1915        }
1916    }
1917
1918    ALOGV("selectOutputForEffects outputOffloaded %d outputDeepBuffer %d",
1919          outputOffloaded, outputDeepBuffer);
1920    if (outputOffloaded != 0) {
1921        return outputOffloaded;
1922    }
1923    if (outputDeepBuffer != 0) {
1924        return outputDeepBuffer;
1925    }
1926
1927    return outputs[0];
1928}
1929
1930audio_io_handle_t AudioPolicyManager::getOutputForEffect(const effect_descriptor_t *desc)
1931{
1932    // apply simple rule where global effects are attached to the same output as MUSIC streams
1933
1934    routing_strategy strategy = getStrategy(AUDIO_STREAM_MUSIC);
1935    audio_devices_t device = getDeviceForStrategy(strategy, false /*fromCache*/);
1936    SortedVector<audio_io_handle_t> dstOutputs = getOutputsForDevice(device, mOutputs);
1937
1938    audio_io_handle_t output = selectOutputForEffects(dstOutputs);
1939    ALOGV("getOutputForEffect() got output %d for fx %s flags %x",
1940          output, (desc == NULL) ? "unspecified" : desc->name,  (desc == NULL) ? 0 : desc->flags);
1941
1942    return output;
1943}
1944
1945status_t AudioPolicyManager::registerEffect(const effect_descriptor_t *desc,
1946                                audio_io_handle_t io,
1947                                uint32_t strategy,
1948                                int session,
1949                                int id)
1950{
1951    ssize_t index = mOutputs.indexOfKey(io);
1952    if (index < 0) {
1953        index = mInputs.indexOfKey(io);
1954        if (index < 0) {
1955            ALOGW("registerEffect() unknown io %d", io);
1956            return INVALID_OPERATION;
1957        }
1958    }
1959
1960    if (mTotalEffectsMemory + desc->memoryUsage > getMaxEffectsMemory()) {
1961        ALOGW("registerEffect() memory limit exceeded for Fx %s, Memory %d KB",
1962                desc->name, desc->memoryUsage);
1963        return INVALID_OPERATION;
1964    }
1965    mTotalEffectsMemory += desc->memoryUsage;
1966    ALOGV("registerEffect() effect %s, io %d, strategy %d session %d id %d",
1967            desc->name, io, strategy, session, id);
1968    ALOGV("registerEffect() memory %d, total memory %d", desc->memoryUsage, mTotalEffectsMemory);
1969
1970    sp<EffectDescriptor> effectDesc = new EffectDescriptor();
1971    memcpy (&effectDesc->mDesc, desc, sizeof(effect_descriptor_t));
1972    effectDesc->mIo = io;
1973    effectDesc->mStrategy = (routing_strategy)strategy;
1974    effectDesc->mSession = session;
1975    effectDesc->mEnabled = false;
1976
1977    mEffects.add(id, effectDesc);
1978
1979    return NO_ERROR;
1980}
1981
1982status_t AudioPolicyManager::unregisterEffect(int id)
1983{
1984    ssize_t index = mEffects.indexOfKey(id);
1985    if (index < 0) {
1986        ALOGW("unregisterEffect() unknown effect ID %d", id);
1987        return INVALID_OPERATION;
1988    }
1989
1990    sp<EffectDescriptor> effectDesc = mEffects.valueAt(index);
1991
1992    setEffectEnabled(effectDesc, false);
1993
1994    if (mTotalEffectsMemory < effectDesc->mDesc.memoryUsage) {
1995        ALOGW("unregisterEffect() memory %d too big for total %d",
1996                effectDesc->mDesc.memoryUsage, mTotalEffectsMemory);
1997        effectDesc->mDesc.memoryUsage = mTotalEffectsMemory;
1998    }
1999    mTotalEffectsMemory -= effectDesc->mDesc.memoryUsage;
2000    ALOGV("unregisterEffect() effect %s, ID %d, memory %d total memory %d",
2001            effectDesc->mDesc.name, id, effectDesc->mDesc.memoryUsage, mTotalEffectsMemory);
2002
2003    mEffects.removeItem(id);
2004
2005    return NO_ERROR;
2006}
2007
2008status_t AudioPolicyManager::setEffectEnabled(int id, bool enabled)
2009{
2010    ssize_t index = mEffects.indexOfKey(id);
2011    if (index < 0) {
2012        ALOGW("unregisterEffect() unknown effect ID %d", id);
2013        return INVALID_OPERATION;
2014    }
2015
2016    return setEffectEnabled(mEffects.valueAt(index), enabled);
2017}
2018
2019status_t AudioPolicyManager::setEffectEnabled(const sp<EffectDescriptor>& effectDesc, bool enabled)
2020{
2021    if (enabled == effectDesc->mEnabled) {
2022        ALOGV("setEffectEnabled(%s) effect already %s",
2023             enabled?"true":"false", enabled?"enabled":"disabled");
2024        return INVALID_OPERATION;
2025    }
2026
2027    if (enabled) {
2028        if (mTotalEffectsCpuLoad + effectDesc->mDesc.cpuLoad > getMaxEffectsCpuLoad()) {
2029            ALOGW("setEffectEnabled(true) CPU Load limit exceeded for Fx %s, CPU %f MIPS",
2030                 effectDesc->mDesc.name, (float)effectDesc->mDesc.cpuLoad/10);
2031            return INVALID_OPERATION;
2032        }
2033        mTotalEffectsCpuLoad += effectDesc->mDesc.cpuLoad;
2034        ALOGV("setEffectEnabled(true) total CPU %d", mTotalEffectsCpuLoad);
2035    } else {
2036        if (mTotalEffectsCpuLoad < effectDesc->mDesc.cpuLoad) {
2037            ALOGW("setEffectEnabled(false) CPU load %d too high for total %d",
2038                    effectDesc->mDesc.cpuLoad, mTotalEffectsCpuLoad);
2039            effectDesc->mDesc.cpuLoad = mTotalEffectsCpuLoad;
2040        }
2041        mTotalEffectsCpuLoad -= effectDesc->mDesc.cpuLoad;
2042        ALOGV("setEffectEnabled(false) total CPU %d", mTotalEffectsCpuLoad);
2043    }
2044    effectDesc->mEnabled = enabled;
2045    return NO_ERROR;
2046}
2047
2048bool AudioPolicyManager::isNonOffloadableEffectEnabled()
2049{
2050    for (size_t i = 0; i < mEffects.size(); i++) {
2051        sp<EffectDescriptor> effectDesc = mEffects.valueAt(i);
2052        if (effectDesc->mEnabled && (effectDesc->mStrategy == STRATEGY_MEDIA) &&
2053                ((effectDesc->mDesc.flags & EFFECT_FLAG_OFFLOAD_SUPPORTED) == 0)) {
2054            ALOGV("isNonOffloadableEffectEnabled() non offloadable effect %s enabled on session %d",
2055                  effectDesc->mDesc.name, effectDesc->mSession);
2056            return true;
2057        }
2058    }
2059    return false;
2060}
2061
2062bool AudioPolicyManager::isStreamActive(audio_stream_type_t stream, uint32_t inPastMs) const
2063{
2064    nsecs_t sysTime = systemTime();
2065    for (size_t i = 0; i < mOutputs.size(); i++) {
2066        const sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(i);
2067        if (outputDesc->isStreamActive(stream, inPastMs, sysTime)) {
2068            return true;
2069        }
2070    }
2071    return false;
2072}
2073
2074bool AudioPolicyManager::isStreamActiveRemotely(audio_stream_type_t stream,
2075                                                    uint32_t inPastMs) const
2076{
2077    nsecs_t sysTime = systemTime();
2078    for (size_t i = 0; i < mOutputs.size(); i++) {
2079        const sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(i);
2080        if (((outputDesc->device() & APM_AUDIO_OUT_DEVICE_REMOTE_ALL) != 0) &&
2081                outputDesc->isStreamActive(stream, inPastMs, sysTime)) {
2082            // do not consider re routing (when the output is going to a dynamic policy)
2083            // as "remote playback"
2084            if (outputDesc->mPolicyMix == NULL) {
2085                return true;
2086            }
2087        }
2088    }
2089    return false;
2090}
2091
2092bool AudioPolicyManager::isSourceActive(audio_source_t source) const
2093{
2094    for (size_t i = 0; i < mInputs.size(); i++) {
2095        const sp<AudioInputDescriptor>  inputDescriptor = mInputs.valueAt(i);
2096        if (inputDescriptor->mRefCount == 0) {
2097            continue;
2098        }
2099        if (inputDescriptor->mInputSource == (int)source) {
2100            return true;
2101        }
2102        // AUDIO_SOURCE_HOTWORD is equivalent to AUDIO_SOURCE_VOICE_RECOGNITION only if it
2103        // corresponds to an active capture triggered by a hardware hotword recognition
2104        if ((source == AUDIO_SOURCE_VOICE_RECOGNITION) &&
2105                 (inputDescriptor->mInputSource == AUDIO_SOURCE_HOTWORD)) {
2106            // FIXME: we should not assume that the first session is the active one and keep
2107            // activity count per session. Same in startInput().
2108            ssize_t index = mSoundTriggerSessions.indexOfKey(inputDescriptor->mSessions.itemAt(0));
2109            if (index >= 0) {
2110                return true;
2111            }
2112        }
2113    }
2114    return false;
2115}
2116
2117// Register a list of custom mixes with their attributes and format.
2118// When a mix is registered, corresponding input and output profiles are
2119// added to the remote submix hw module. The profile contains only the
2120// parameters (sampling rate, format...) specified by the mix.
2121// The corresponding input remote submix device is also connected.
2122//
2123// When a remote submix device is connected, the address is checked to select the
2124// appropriate profile and the corresponding input or output stream is opened.
2125//
2126// When capture starts, getInputForAttr() will:
2127//  - 1 look for a mix matching the address passed in attribtutes tags if any
2128//  - 2 if none found, getDeviceForInputSource() will:
2129//     - 2.1 look for a mix matching the attributes source
2130//     - 2.2 if none found, default to device selection by policy rules
2131// At this time, the corresponding output remote submix device is also connected
2132// and active playback use cases can be transferred to this mix if needed when reconnecting
2133// after AudioTracks are invalidated
2134//
2135// When playback starts, getOutputForAttr() will:
2136//  - 1 look for a mix matching the address passed in attribtutes tags if any
2137//  - 2 if none found, look for a mix matching the attributes usage
2138//  - 3 if none found, default to device and output selection by policy rules.
2139
2140status_t AudioPolicyManager::registerPolicyMixes(Vector<AudioMix> mixes)
2141{
2142    sp<HwModule> module;
2143    for (size_t i = 0; i < mHwModules.size(); i++) {
2144        if (strcmp(AUDIO_HARDWARE_MODULE_ID_REMOTE_SUBMIX, mHwModules[i]->mName) == 0 &&
2145                mHwModules[i]->mHandle != 0) {
2146            module = mHwModules[i];
2147            break;
2148        }
2149    }
2150
2151    if (module == 0) {
2152        return INVALID_OPERATION;
2153    }
2154
2155    ALOGV("registerPolicyMixes() num mixes %d", mixes.size());
2156
2157    for (size_t i = 0; i < mixes.size(); i++) {
2158        String8 address = mixes[i].mRegistrationId;
2159        ssize_t index = mPolicyMixes.indexOfKey(address);
2160        if (index >= 0) {
2161            ALOGE("registerPolicyMixes(): mix for address %s already registered", address.string());
2162            continue;
2163        }
2164        audio_config_t outputConfig = mixes[i].mFormat;
2165        audio_config_t inputConfig = mixes[i].mFormat;
2166        // NOTE: audio flinger mixer does not support mono output: configure remote submix HAL in
2167        // stereo and let audio flinger do the channel conversion if needed.
2168        outputConfig.channel_mask = AUDIO_CHANNEL_OUT_STEREO;
2169        inputConfig.channel_mask = AUDIO_CHANNEL_IN_STEREO;
2170        module->addOutputProfile(address, &outputConfig,
2171                                 AUDIO_DEVICE_OUT_REMOTE_SUBMIX, address);
2172        module->addInputProfile(address, &inputConfig,
2173                                 AUDIO_DEVICE_IN_REMOTE_SUBMIX, address);
2174        sp<AudioPolicyMix> policyMix = new AudioPolicyMix();
2175        policyMix->mMix = mixes[i];
2176        mPolicyMixes.add(address, policyMix);
2177        if (mixes[i].mMixType == MIX_TYPE_PLAYERS) {
2178            setDeviceConnectionStateInt(AUDIO_DEVICE_IN_REMOTE_SUBMIX,
2179                                     AUDIO_POLICY_DEVICE_STATE_AVAILABLE,
2180                                     address.string());
2181        } else {
2182            setDeviceConnectionStateInt(AUDIO_DEVICE_OUT_REMOTE_SUBMIX,
2183                                     AUDIO_POLICY_DEVICE_STATE_AVAILABLE,
2184                                     address.string());
2185        }
2186    }
2187    return NO_ERROR;
2188}
2189
2190status_t AudioPolicyManager::unregisterPolicyMixes(Vector<AudioMix> mixes)
2191{
2192    sp<HwModule> module;
2193    for (size_t i = 0; i < mHwModules.size(); i++) {
2194        if (strcmp(AUDIO_HARDWARE_MODULE_ID_REMOTE_SUBMIX, mHwModules[i]->mName) == 0 &&
2195                mHwModules[i]->mHandle != 0) {
2196            module = mHwModules[i];
2197            break;
2198        }
2199    }
2200
2201    if (module == 0) {
2202        return INVALID_OPERATION;
2203    }
2204
2205    ALOGV("unregisterPolicyMixes() num mixes %d", mixes.size());
2206
2207    for (size_t i = 0; i < mixes.size(); i++) {
2208        String8 address = mixes[i].mRegistrationId;
2209        ssize_t index = mPolicyMixes.indexOfKey(address);
2210        if (index < 0) {
2211            ALOGE("unregisterPolicyMixes(): mix for address %s not registered", address.string());
2212            continue;
2213        }
2214
2215        mPolicyMixes.removeItemsAt(index);
2216
2217        if (getDeviceConnectionState(AUDIO_DEVICE_IN_REMOTE_SUBMIX, address.string()) ==
2218                                             AUDIO_POLICY_DEVICE_STATE_AVAILABLE)
2219        {
2220            setDeviceConnectionStateInt(AUDIO_DEVICE_IN_REMOTE_SUBMIX,
2221                                     AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE,
2222                                     address.string());
2223        }
2224
2225        if (getDeviceConnectionState(AUDIO_DEVICE_OUT_REMOTE_SUBMIX, address.string()) ==
2226                                             AUDIO_POLICY_DEVICE_STATE_AVAILABLE)
2227        {
2228            setDeviceConnectionStateInt(AUDIO_DEVICE_OUT_REMOTE_SUBMIX,
2229                                     AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE,
2230                                     address.string());
2231        }
2232        module->removeOutputProfile(address);
2233        module->removeInputProfile(address);
2234    }
2235    return NO_ERROR;
2236}
2237
2238
2239status_t AudioPolicyManager::dump(int fd)
2240{
2241    const size_t SIZE = 256;
2242    char buffer[SIZE];
2243    String8 result;
2244
2245    snprintf(buffer, SIZE, "\nAudioPolicyManager Dump: %p\n", this);
2246    result.append(buffer);
2247
2248    snprintf(buffer, SIZE, " Primary Output: %d\n", mPrimaryOutput);
2249    result.append(buffer);
2250    snprintf(buffer, SIZE, " Phone state: %d\n", mPhoneState);
2251    result.append(buffer);
2252    snprintf(buffer, SIZE, " Force use for communications %d\n",
2253             mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION]);
2254    result.append(buffer);
2255    snprintf(buffer, SIZE, " Force use for media %d\n", mForceUse[AUDIO_POLICY_FORCE_FOR_MEDIA]);
2256    result.append(buffer);
2257    snprintf(buffer, SIZE, " Force use for record %d\n", mForceUse[AUDIO_POLICY_FORCE_FOR_RECORD]);
2258    result.append(buffer);
2259    snprintf(buffer, SIZE, " Force use for dock %d\n", mForceUse[AUDIO_POLICY_FORCE_FOR_DOCK]);
2260    result.append(buffer);
2261    snprintf(buffer, SIZE, " Force use for system %d\n", mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM]);
2262    result.append(buffer);
2263    snprintf(buffer, SIZE, " Force use for hdmi system audio %d\n",
2264            mForceUse[AUDIO_POLICY_FORCE_FOR_HDMI_SYSTEM_AUDIO]);
2265    result.append(buffer);
2266
2267    snprintf(buffer, SIZE, " Available output devices:\n");
2268    result.append(buffer);
2269    write(fd, result.string(), result.size());
2270    for (size_t i = 0; i < mAvailableOutputDevices.size(); i++) {
2271        mAvailableOutputDevices[i]->dump(fd, 2, i);
2272    }
2273    snprintf(buffer, SIZE, "\n Available input devices:\n");
2274    write(fd, buffer, strlen(buffer));
2275    for (size_t i = 0; i < mAvailableInputDevices.size(); i++) {
2276        mAvailableInputDevices[i]->dump(fd, 2, i);
2277    }
2278
2279    snprintf(buffer, SIZE, "\nHW Modules dump:\n");
2280    write(fd, buffer, strlen(buffer));
2281    for (size_t i = 0; i < mHwModules.size(); i++) {
2282        snprintf(buffer, SIZE, "- HW Module %zu:\n", i + 1);
2283        write(fd, buffer, strlen(buffer));
2284        mHwModules[i]->dump(fd);
2285    }
2286
2287    snprintf(buffer, SIZE, "\nOutputs dump:\n");
2288    write(fd, buffer, strlen(buffer));
2289    for (size_t i = 0; i < mOutputs.size(); i++) {
2290        snprintf(buffer, SIZE, "- Output %d dump:\n", mOutputs.keyAt(i));
2291        write(fd, buffer, strlen(buffer));
2292        mOutputs.valueAt(i)->dump(fd);
2293    }
2294
2295    snprintf(buffer, SIZE, "\nInputs dump:\n");
2296    write(fd, buffer, strlen(buffer));
2297    for (size_t i = 0; i < mInputs.size(); i++) {
2298        snprintf(buffer, SIZE, "- Input %d dump:\n", mInputs.keyAt(i));
2299        write(fd, buffer, strlen(buffer));
2300        mInputs.valueAt(i)->dump(fd);
2301    }
2302
2303    snprintf(buffer, SIZE, "\nStreams dump:\n");
2304    write(fd, buffer, strlen(buffer));
2305    snprintf(buffer, SIZE,
2306             " Stream  Can be muted  Index Min  Index Max  Index Cur [device : index]...\n");
2307    write(fd, buffer, strlen(buffer));
2308    for (size_t i = 0; i < AUDIO_STREAM_CNT; i++) {
2309        snprintf(buffer, SIZE, " %02zu      ", i);
2310        write(fd, buffer, strlen(buffer));
2311        mStreams[i].dump(fd);
2312    }
2313
2314    snprintf(buffer, SIZE, "\nTotal Effects CPU: %f MIPS, Total Effects memory: %d KB\n",
2315            (float)mTotalEffectsCpuLoad/10, mTotalEffectsMemory);
2316    write(fd, buffer, strlen(buffer));
2317
2318    snprintf(buffer, SIZE, "Registered effects:\n");
2319    write(fd, buffer, strlen(buffer));
2320    for (size_t i = 0; i < mEffects.size(); i++) {
2321        snprintf(buffer, SIZE, "- Effect %d dump:\n", mEffects.keyAt(i));
2322        write(fd, buffer, strlen(buffer));
2323        mEffects.valueAt(i)->dump(fd);
2324    }
2325
2326    snprintf(buffer, SIZE, "\nAudio Patches:\n");
2327    write(fd, buffer, strlen(buffer));
2328    for (size_t i = 0; i < mAudioPatches.size(); i++) {
2329        mAudioPatches[i]->dump(fd, 2, i);
2330    }
2331
2332    return NO_ERROR;
2333}
2334
2335// This function checks for the parameters which can be offloaded.
2336// This can be enhanced depending on the capability of the DSP and policy
2337// of the system.
2338bool AudioPolicyManager::isOffloadSupported(const audio_offload_info_t& offloadInfo)
2339{
2340    ALOGV("isOffloadSupported: SR=%u, CM=0x%x, Format=0x%x, StreamType=%d,"
2341     " BitRate=%u, duration=%" PRId64 " us, has_video=%d",
2342     offloadInfo.sample_rate, offloadInfo.channel_mask,
2343     offloadInfo.format,
2344     offloadInfo.stream_type, offloadInfo.bit_rate, offloadInfo.duration_us,
2345     offloadInfo.has_video);
2346
2347    // Check if offload has been disabled
2348    char propValue[PROPERTY_VALUE_MAX];
2349    if (property_get("audio.offload.disable", propValue, "0")) {
2350        if (atoi(propValue) != 0) {
2351            ALOGV("offload disabled by audio.offload.disable=%s", propValue );
2352            return false;
2353        }
2354    }
2355
2356    // Check if stream type is music, then only allow offload as of now.
2357    if (offloadInfo.stream_type != AUDIO_STREAM_MUSIC)
2358    {
2359        ALOGV("isOffloadSupported: stream_type != MUSIC, returning false");
2360        return false;
2361    }
2362
2363    //TODO: enable audio offloading with video when ready
2364    if (offloadInfo.has_video)
2365    {
2366        ALOGV("isOffloadSupported: has_video == true, returning false");
2367        return false;
2368    }
2369
2370    //If duration is less than minimum value defined in property, return false
2371    if (property_get("audio.offload.min.duration.secs", propValue, NULL)) {
2372        if (offloadInfo.duration_us < (atoi(propValue) * 1000000 )) {
2373            ALOGV("Offload denied by duration < audio.offload.min.duration.secs(=%s)", propValue);
2374            return false;
2375        }
2376    } else if (offloadInfo.duration_us < OFFLOAD_DEFAULT_MIN_DURATION_SECS * 1000000) {
2377        ALOGV("Offload denied by duration < default min(=%u)", OFFLOAD_DEFAULT_MIN_DURATION_SECS);
2378        return false;
2379    }
2380
2381    // Do not allow offloading if one non offloadable effect is enabled. This prevents from
2382    // creating an offloaded track and tearing it down immediately after start when audioflinger
2383    // detects there is an active non offloadable effect.
2384    // FIXME: We should check the audio session here but we do not have it in this context.
2385    // This may prevent offloading in rare situations where effects are left active by apps
2386    // in the background.
2387    if (isNonOffloadableEffectEnabled()) {
2388        return false;
2389    }
2390
2391    // See if there is a profile to support this.
2392    // AUDIO_DEVICE_NONE
2393    sp<IOProfile> profile = getProfileForDirectOutput(AUDIO_DEVICE_NONE /*ignore device */,
2394                                            offloadInfo.sample_rate,
2395                                            offloadInfo.format,
2396                                            offloadInfo.channel_mask,
2397                                            AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD);
2398    ALOGV("isOffloadSupported() profile %sfound", profile != 0 ? "" : "NOT ");
2399    return (profile != 0);
2400}
2401
2402status_t AudioPolicyManager::listAudioPorts(audio_port_role_t role,
2403                                            audio_port_type_t type,
2404                                            unsigned int *num_ports,
2405                                            struct audio_port *ports,
2406                                            unsigned int *generation)
2407{
2408    if (num_ports == NULL || (*num_ports != 0 && ports == NULL) ||
2409            generation == NULL) {
2410        return BAD_VALUE;
2411    }
2412    ALOGV("listAudioPorts() role %d type %d num_ports %d ports %p", role, type, *num_ports, ports);
2413    if (ports == NULL) {
2414        *num_ports = 0;
2415    }
2416
2417    size_t portsWritten = 0;
2418    size_t portsMax = *num_ports;
2419    *num_ports = 0;
2420    if (type == AUDIO_PORT_TYPE_NONE || type == AUDIO_PORT_TYPE_DEVICE) {
2421        if (role == AUDIO_PORT_ROLE_SINK || role == AUDIO_PORT_ROLE_NONE) {
2422            for (size_t i = 0;
2423                    i  < mAvailableOutputDevices.size() && portsWritten < portsMax; i++) {
2424                mAvailableOutputDevices[i]->toAudioPort(&ports[portsWritten++]);
2425            }
2426            *num_ports += mAvailableOutputDevices.size();
2427        }
2428        if (role == AUDIO_PORT_ROLE_SOURCE || role == AUDIO_PORT_ROLE_NONE) {
2429            for (size_t i = 0;
2430                    i  < mAvailableInputDevices.size() && portsWritten < portsMax; i++) {
2431                mAvailableInputDevices[i]->toAudioPort(&ports[portsWritten++]);
2432            }
2433            *num_ports += mAvailableInputDevices.size();
2434        }
2435    }
2436    if (type == AUDIO_PORT_TYPE_NONE || type == AUDIO_PORT_TYPE_MIX) {
2437        if (role == AUDIO_PORT_ROLE_SINK || role == AUDIO_PORT_ROLE_NONE) {
2438            for (size_t i = 0; i < mInputs.size() && portsWritten < portsMax; i++) {
2439                mInputs[i]->toAudioPort(&ports[portsWritten++]);
2440            }
2441            *num_ports += mInputs.size();
2442        }
2443        if (role == AUDIO_PORT_ROLE_SOURCE || role == AUDIO_PORT_ROLE_NONE) {
2444            size_t numOutputs = 0;
2445            for (size_t i = 0; i < mOutputs.size(); i++) {
2446                if (!mOutputs[i]->isDuplicated()) {
2447                    numOutputs++;
2448                    if (portsWritten < portsMax) {
2449                        mOutputs[i]->toAudioPort(&ports[portsWritten++]);
2450                    }
2451                }
2452            }
2453            *num_ports += numOutputs;
2454        }
2455    }
2456    *generation = curAudioPortGeneration();
2457    ALOGV("listAudioPorts() got %zu ports needed %d", portsWritten, *num_ports);
2458    return NO_ERROR;
2459}
2460
2461status_t AudioPolicyManager::getAudioPort(struct audio_port *port __unused)
2462{
2463    return NO_ERROR;
2464}
2465
2466sp<AudioPolicyManager::AudioOutputDescriptor> AudioPolicyManager::getOutputFromId(
2467                                                                    audio_port_handle_t id) const
2468{
2469    sp<AudioOutputDescriptor> outputDesc = NULL;
2470    for (size_t i = 0; i < mOutputs.size(); i++) {
2471        outputDesc = mOutputs.valueAt(i);
2472        if (outputDesc->mId == id) {
2473            break;
2474        }
2475    }
2476    return outputDesc;
2477}
2478
2479sp<AudioPolicyManager::AudioInputDescriptor> AudioPolicyManager::getInputFromId(
2480                                                                    audio_port_handle_t id) const
2481{
2482    sp<AudioInputDescriptor> inputDesc = NULL;
2483    for (size_t i = 0; i < mInputs.size(); i++) {
2484        inputDesc = mInputs.valueAt(i);
2485        if (inputDesc->mId == id) {
2486            break;
2487        }
2488    }
2489    return inputDesc;
2490}
2491
2492sp <AudioPolicyManager::HwModule> AudioPolicyManager::getModuleForDevice(
2493                                                                    audio_devices_t device) const
2494{
2495    sp <HwModule> module;
2496
2497    for (size_t i = 0; i < mHwModules.size(); i++) {
2498        if (mHwModules[i]->mHandle == 0) {
2499            continue;
2500        }
2501        if (audio_is_output_device(device)) {
2502            for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
2503            {
2504                if (mHwModules[i]->mOutputProfiles[j]->mSupportedDevices.types() & device) {
2505                    return mHwModules[i];
2506                }
2507            }
2508        } else {
2509            for (size_t j = 0; j < mHwModules[i]->mInputProfiles.size(); j++) {
2510                if (mHwModules[i]->mInputProfiles[j]->mSupportedDevices.types() &
2511                        device & ~AUDIO_DEVICE_BIT_IN) {
2512                    return mHwModules[i];
2513                }
2514            }
2515        }
2516    }
2517    return module;
2518}
2519
2520sp <AudioPolicyManager::HwModule> AudioPolicyManager::getModuleFromName(const char *name) const
2521{
2522    sp <HwModule> module;
2523
2524    for (size_t i = 0; i < mHwModules.size(); i++)
2525    {
2526        if (strcmp(mHwModules[i]->mName, name) == 0) {
2527            return mHwModules[i];
2528        }
2529    }
2530    return module;
2531}
2532
2533audio_devices_t AudioPolicyManager::availablePrimaryOutputDevices()
2534{
2535    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(mPrimaryOutput);
2536    audio_devices_t devices = outputDesc->mProfile->mSupportedDevices.types();
2537    return devices & mAvailableOutputDevices.types();
2538}
2539
2540audio_devices_t AudioPolicyManager::availablePrimaryInputDevices()
2541{
2542    audio_module_handle_t primaryHandle =
2543                                mOutputs.valueFor(mPrimaryOutput)->mProfile->mModule->mHandle;
2544    audio_devices_t devices = AUDIO_DEVICE_NONE;
2545    for (size_t i = 0; i < mAvailableInputDevices.size(); i++) {
2546        if (mAvailableInputDevices[i]->mModule->mHandle == primaryHandle) {
2547            devices |= mAvailableInputDevices[i]->mDeviceType;
2548        }
2549    }
2550    return devices;
2551}
2552
2553status_t AudioPolicyManager::createAudioPatch(const struct audio_patch *patch,
2554                                               audio_patch_handle_t *handle,
2555                                               uid_t uid)
2556{
2557    ALOGV("createAudioPatch()");
2558
2559    if (handle == NULL || patch == NULL) {
2560        return BAD_VALUE;
2561    }
2562    ALOGV("createAudioPatch() num sources %d num sinks %d", patch->num_sources, patch->num_sinks);
2563
2564    if (patch->num_sources == 0 || patch->num_sources > AUDIO_PATCH_PORTS_MAX ||
2565            patch->num_sinks == 0 || patch->num_sinks > AUDIO_PATCH_PORTS_MAX) {
2566        return BAD_VALUE;
2567    }
2568    // only one source per audio patch supported for now
2569    if (patch->num_sources > 1) {
2570        return INVALID_OPERATION;
2571    }
2572
2573    if (patch->sources[0].role != AUDIO_PORT_ROLE_SOURCE) {
2574        return INVALID_OPERATION;
2575    }
2576    for (size_t i = 0; i < patch->num_sinks; i++) {
2577        if (patch->sinks[i].role != AUDIO_PORT_ROLE_SINK) {
2578            return INVALID_OPERATION;
2579        }
2580    }
2581
2582    sp<AudioPatch> patchDesc;
2583    ssize_t index = mAudioPatches.indexOfKey(*handle);
2584
2585    ALOGV("createAudioPatch source id %d role %d type %d", patch->sources[0].id,
2586                                                           patch->sources[0].role,
2587                                                           patch->sources[0].type);
2588#if LOG_NDEBUG == 0
2589    for (size_t i = 0; i < patch->num_sinks; i++) {
2590        ALOGV("createAudioPatch sink %d: id %d role %d type %d", i, patch->sinks[i].id,
2591                                                             patch->sinks[i].role,
2592                                                             patch->sinks[i].type);
2593    }
2594#endif
2595
2596    if (index >= 0) {
2597        patchDesc = mAudioPatches.valueAt(index);
2598        ALOGV("createAudioPatch() mUidCached %d patchDesc->mUid %d uid %d",
2599                                                                  mUidCached, patchDesc->mUid, uid);
2600        if (patchDesc->mUid != mUidCached && uid != patchDesc->mUid) {
2601            return INVALID_OPERATION;
2602        }
2603    } else {
2604        *handle = 0;
2605    }
2606
2607    if (patch->sources[0].type == AUDIO_PORT_TYPE_MIX) {
2608        sp<AudioOutputDescriptor> outputDesc = getOutputFromId(patch->sources[0].id);
2609        if (outputDesc == NULL) {
2610            ALOGV("createAudioPatch() output not found for id %d", patch->sources[0].id);
2611            return BAD_VALUE;
2612        }
2613        ALOG_ASSERT(!outputDesc->isDuplicated(),"duplicated output %d in source in ports",
2614                                                outputDesc->mIoHandle);
2615        if (patchDesc != 0) {
2616            if (patchDesc->mPatch.sources[0].id != patch->sources[0].id) {
2617                ALOGV("createAudioPatch() source id differs for patch current id %d new id %d",
2618                                          patchDesc->mPatch.sources[0].id, patch->sources[0].id);
2619                return BAD_VALUE;
2620            }
2621        }
2622        DeviceVector devices;
2623        for (size_t i = 0; i < patch->num_sinks; i++) {
2624            // Only support mix to devices connection
2625            // TODO add support for mix to mix connection
2626            if (patch->sinks[i].type != AUDIO_PORT_TYPE_DEVICE) {
2627                ALOGV("createAudioPatch() source mix but sink is not a device");
2628                return INVALID_OPERATION;
2629            }
2630            sp<DeviceDescriptor> devDesc =
2631                    mAvailableOutputDevices.getDeviceFromId(patch->sinks[i].id);
2632            if (devDesc == 0) {
2633                ALOGV("createAudioPatch() out device not found for id %d", patch->sinks[i].id);
2634                return BAD_VALUE;
2635            }
2636
2637            if (!outputDesc->mProfile->isCompatibleProfile(devDesc->mDeviceType,
2638                                                           devDesc->mAddress,
2639                                                           patch->sources[0].sample_rate,
2640                                                         NULL,  // updatedSamplingRate
2641                                                         patch->sources[0].format,
2642                                                         patch->sources[0].channel_mask,
2643                                                         AUDIO_OUTPUT_FLAG_NONE /*FIXME*/)) {
2644                ALOGV("createAudioPatch() profile not supported for device %08x",
2645                      devDesc->mDeviceType);
2646                return INVALID_OPERATION;
2647            }
2648            devices.add(devDesc);
2649        }
2650        if (devices.size() == 0) {
2651            return INVALID_OPERATION;
2652        }
2653
2654        // TODO: reconfigure output format and channels here
2655        ALOGV("createAudioPatch() setting device %08x on output %d",
2656              devices.types(), outputDesc->mIoHandle);
2657        setOutputDevice(outputDesc->mIoHandle, devices.types(), true, 0, handle);
2658        index = mAudioPatches.indexOfKey(*handle);
2659        if (index >= 0) {
2660            if (patchDesc != 0 && patchDesc != mAudioPatches.valueAt(index)) {
2661                ALOGW("createAudioPatch() setOutputDevice() did not reuse the patch provided");
2662            }
2663            patchDesc = mAudioPatches.valueAt(index);
2664            patchDesc->mUid = uid;
2665            ALOGV("createAudioPatch() success");
2666        } else {
2667            ALOGW("createAudioPatch() setOutputDevice() failed to create a patch");
2668            return INVALID_OPERATION;
2669        }
2670    } else if (patch->sources[0].type == AUDIO_PORT_TYPE_DEVICE) {
2671        if (patch->sinks[0].type == AUDIO_PORT_TYPE_MIX) {
2672            // input device to input mix connection
2673            // only one sink supported when connecting an input device to a mix
2674            if (patch->num_sinks > 1) {
2675                return INVALID_OPERATION;
2676            }
2677            sp<AudioInputDescriptor> inputDesc = getInputFromId(patch->sinks[0].id);
2678            if (inputDesc == NULL) {
2679                return BAD_VALUE;
2680            }
2681            if (patchDesc != 0) {
2682                if (patchDesc->mPatch.sinks[0].id != patch->sinks[0].id) {
2683                    return BAD_VALUE;
2684                }
2685            }
2686            sp<DeviceDescriptor> devDesc =
2687                    mAvailableInputDevices.getDeviceFromId(patch->sources[0].id);
2688            if (devDesc == 0) {
2689                return BAD_VALUE;
2690            }
2691
2692            if (!inputDesc->mProfile->isCompatibleProfile(devDesc->mDeviceType,
2693                                                          devDesc->mAddress,
2694                                                          patch->sinks[0].sample_rate,
2695                                                          NULL, /*updatedSampleRate*/
2696                                                          patch->sinks[0].format,
2697                                                          patch->sinks[0].channel_mask,
2698                                                          // FIXME for the parameter type,
2699                                                          // and the NONE
2700                                                          (audio_output_flags_t)
2701                                                            AUDIO_INPUT_FLAG_NONE)) {
2702                return INVALID_OPERATION;
2703            }
2704            // TODO: reconfigure output format and channels here
2705            ALOGV("createAudioPatch() setting device %08x on output %d",
2706                                                  devDesc->mDeviceType, inputDesc->mIoHandle);
2707            setInputDevice(inputDesc->mIoHandle, devDesc->mDeviceType, true, handle);
2708            index = mAudioPatches.indexOfKey(*handle);
2709            if (index >= 0) {
2710                if (patchDesc != 0 && patchDesc != mAudioPatches.valueAt(index)) {
2711                    ALOGW("createAudioPatch() setInputDevice() did not reuse the patch provided");
2712                }
2713                patchDesc = mAudioPatches.valueAt(index);
2714                patchDesc->mUid = uid;
2715                ALOGV("createAudioPatch() success");
2716            } else {
2717                ALOGW("createAudioPatch() setInputDevice() failed to create a patch");
2718                return INVALID_OPERATION;
2719            }
2720        } else if (patch->sinks[0].type == AUDIO_PORT_TYPE_DEVICE) {
2721            // device to device connection
2722            if (patchDesc != 0) {
2723                if (patchDesc->mPatch.sources[0].id != patch->sources[0].id) {
2724                    return BAD_VALUE;
2725                }
2726            }
2727            sp<DeviceDescriptor> srcDeviceDesc =
2728                    mAvailableInputDevices.getDeviceFromId(patch->sources[0].id);
2729            if (srcDeviceDesc == 0) {
2730                return BAD_VALUE;
2731            }
2732
2733            //update source and sink with our own data as the data passed in the patch may
2734            // be incomplete.
2735            struct audio_patch newPatch = *patch;
2736            srcDeviceDesc->toAudioPortConfig(&newPatch.sources[0], &patch->sources[0]);
2737
2738            for (size_t i = 0; i < patch->num_sinks; i++) {
2739                if (patch->sinks[i].type != AUDIO_PORT_TYPE_DEVICE) {
2740                    ALOGV("createAudioPatch() source device but one sink is not a device");
2741                    return INVALID_OPERATION;
2742                }
2743
2744                sp<DeviceDescriptor> sinkDeviceDesc =
2745                        mAvailableOutputDevices.getDeviceFromId(patch->sinks[i].id);
2746                if (sinkDeviceDesc == 0) {
2747                    return BAD_VALUE;
2748                }
2749                sinkDeviceDesc->toAudioPortConfig(&newPatch.sinks[i], &patch->sinks[i]);
2750
2751                if (srcDeviceDesc->mModule != sinkDeviceDesc->mModule) {
2752                    // only one sink supported when connected devices across HW modules
2753                    if (patch->num_sinks > 1) {
2754                        return INVALID_OPERATION;
2755                    }
2756                    SortedVector<audio_io_handle_t> outputs =
2757                                            getOutputsForDevice(sinkDeviceDesc->mDeviceType,
2758                                                                mOutputs);
2759                    // if the sink device is reachable via an opened output stream, request to go via
2760                    // this output stream by adding a second source to the patch description
2761                    audio_io_handle_t output = selectOutput(outputs,
2762                                                            AUDIO_OUTPUT_FLAG_NONE,
2763                                                            AUDIO_FORMAT_INVALID);
2764                    if (output != AUDIO_IO_HANDLE_NONE) {
2765                        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
2766                        if (outputDesc->isDuplicated()) {
2767                            return INVALID_OPERATION;
2768                        }
2769                        outputDesc->toAudioPortConfig(&newPatch.sources[1], &patch->sources[0]);
2770                        newPatch.num_sources = 2;
2771                    }
2772                }
2773            }
2774            // TODO: check from routing capabilities in config file and other conflicting patches
2775
2776            audio_patch_handle_t afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
2777            if (index >= 0) {
2778                afPatchHandle = patchDesc->mAfPatchHandle;
2779            }
2780
2781            status_t status = mpClientInterface->createAudioPatch(&newPatch,
2782                                                                  &afPatchHandle,
2783                                                                  0);
2784            ALOGV("createAudioPatch() patch panel returned %d patchHandle %d",
2785                                                                  status, afPatchHandle);
2786            if (status == NO_ERROR) {
2787                if (index < 0) {
2788                    patchDesc = new AudioPatch((audio_patch_handle_t)nextUniqueId(),
2789                                               &newPatch, uid);
2790                    addAudioPatch(patchDesc->mHandle, patchDesc);
2791                } else {
2792                    patchDesc->mPatch = newPatch;
2793                }
2794                patchDesc->mAfPatchHandle = afPatchHandle;
2795                *handle = patchDesc->mHandle;
2796                nextAudioPortGeneration();
2797                mpClientInterface->onAudioPatchListUpdate();
2798            } else {
2799                ALOGW("createAudioPatch() patch panel could not connect device patch, error %d",
2800                status);
2801                return INVALID_OPERATION;
2802            }
2803        } else {
2804            return BAD_VALUE;
2805        }
2806    } else {
2807        return BAD_VALUE;
2808    }
2809    return NO_ERROR;
2810}
2811
2812status_t AudioPolicyManager::releaseAudioPatch(audio_patch_handle_t handle,
2813                                                  uid_t uid)
2814{
2815    ALOGV("releaseAudioPatch() patch %d", handle);
2816
2817    ssize_t index = mAudioPatches.indexOfKey(handle);
2818
2819    if (index < 0) {
2820        return BAD_VALUE;
2821    }
2822    sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
2823    ALOGV("releaseAudioPatch() mUidCached %d patchDesc->mUid %d uid %d",
2824          mUidCached, patchDesc->mUid, uid);
2825    if (patchDesc->mUid != mUidCached && uid != patchDesc->mUid) {
2826        return INVALID_OPERATION;
2827    }
2828
2829    struct audio_patch *patch = &patchDesc->mPatch;
2830    patchDesc->mUid = mUidCached;
2831    if (patch->sources[0].type == AUDIO_PORT_TYPE_MIX) {
2832        sp<AudioOutputDescriptor> outputDesc = getOutputFromId(patch->sources[0].id);
2833        if (outputDesc == NULL) {
2834            ALOGV("releaseAudioPatch() output not found for id %d", patch->sources[0].id);
2835            return BAD_VALUE;
2836        }
2837
2838        setOutputDevice(outputDesc->mIoHandle,
2839                        getNewOutputDevice(outputDesc->mIoHandle, true /*fromCache*/),
2840                       true,
2841                       0,
2842                       NULL);
2843    } else if (patch->sources[0].type == AUDIO_PORT_TYPE_DEVICE) {
2844        if (patch->sinks[0].type == AUDIO_PORT_TYPE_MIX) {
2845            sp<AudioInputDescriptor> inputDesc = getInputFromId(patch->sinks[0].id);
2846            if (inputDesc == NULL) {
2847                ALOGV("releaseAudioPatch() input not found for id %d", patch->sinks[0].id);
2848                return BAD_VALUE;
2849            }
2850            setInputDevice(inputDesc->mIoHandle,
2851                           getNewInputDevice(inputDesc->mIoHandle),
2852                           true,
2853                           NULL);
2854        } else if (patch->sinks[0].type == AUDIO_PORT_TYPE_DEVICE) {
2855            audio_patch_handle_t afPatchHandle = patchDesc->mAfPatchHandle;
2856            status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, 0);
2857            ALOGV("releaseAudioPatch() patch panel returned %d patchHandle %d",
2858                                                              status, patchDesc->mAfPatchHandle);
2859            removeAudioPatch(patchDesc->mHandle);
2860            nextAudioPortGeneration();
2861            mpClientInterface->onAudioPatchListUpdate();
2862        } else {
2863            return BAD_VALUE;
2864        }
2865    } else {
2866        return BAD_VALUE;
2867    }
2868    return NO_ERROR;
2869}
2870
2871status_t AudioPolicyManager::listAudioPatches(unsigned int *num_patches,
2872                                              struct audio_patch *patches,
2873                                              unsigned int *generation)
2874{
2875    if (num_patches == NULL || (*num_patches != 0 && patches == NULL) ||
2876            generation == NULL) {
2877        return BAD_VALUE;
2878    }
2879    ALOGV("listAudioPatches() num_patches %d patches %p available patches %zu",
2880          *num_patches, patches, mAudioPatches.size());
2881    if (patches == NULL) {
2882        *num_patches = 0;
2883    }
2884
2885    size_t patchesWritten = 0;
2886    size_t patchesMax = *num_patches;
2887    for (size_t i = 0;
2888            i  < mAudioPatches.size() && patchesWritten < patchesMax; i++) {
2889        patches[patchesWritten] = mAudioPatches[i]->mPatch;
2890        patches[patchesWritten++].id = mAudioPatches[i]->mHandle;
2891        ALOGV("listAudioPatches() patch %zu num_sources %d num_sinks %d",
2892              i, mAudioPatches[i]->mPatch.num_sources, mAudioPatches[i]->mPatch.num_sinks);
2893    }
2894    *num_patches = mAudioPatches.size();
2895
2896    *generation = curAudioPortGeneration();
2897    ALOGV("listAudioPatches() got %zu patches needed %d", patchesWritten, *num_patches);
2898    return NO_ERROR;
2899}
2900
2901status_t AudioPolicyManager::setAudioPortConfig(const struct audio_port_config *config)
2902{
2903    ALOGV("setAudioPortConfig()");
2904
2905    if (config == NULL) {
2906        return BAD_VALUE;
2907    }
2908    ALOGV("setAudioPortConfig() on port handle %d", config->id);
2909    // Only support gain configuration for now
2910    if (config->config_mask != AUDIO_PORT_CONFIG_GAIN) {
2911        return INVALID_OPERATION;
2912    }
2913
2914    sp<AudioPortConfig> audioPortConfig;
2915    if (config->type == AUDIO_PORT_TYPE_MIX) {
2916        if (config->role == AUDIO_PORT_ROLE_SOURCE) {
2917            sp<AudioOutputDescriptor> outputDesc = getOutputFromId(config->id);
2918            if (outputDesc == NULL) {
2919                return BAD_VALUE;
2920            }
2921            ALOG_ASSERT(!outputDesc->isDuplicated(),
2922                        "setAudioPortConfig() called on duplicated output %d",
2923                        outputDesc->mIoHandle);
2924            audioPortConfig = outputDesc;
2925        } else if (config->role == AUDIO_PORT_ROLE_SINK) {
2926            sp<AudioInputDescriptor> inputDesc = getInputFromId(config->id);
2927            if (inputDesc == NULL) {
2928                return BAD_VALUE;
2929            }
2930            audioPortConfig = inputDesc;
2931        } else {
2932            return BAD_VALUE;
2933        }
2934    } else if (config->type == AUDIO_PORT_TYPE_DEVICE) {
2935        sp<DeviceDescriptor> deviceDesc;
2936        if (config->role == AUDIO_PORT_ROLE_SOURCE) {
2937            deviceDesc = mAvailableInputDevices.getDeviceFromId(config->id);
2938        } else if (config->role == AUDIO_PORT_ROLE_SINK) {
2939            deviceDesc = mAvailableOutputDevices.getDeviceFromId(config->id);
2940        } else {
2941            return BAD_VALUE;
2942        }
2943        if (deviceDesc == NULL) {
2944            return BAD_VALUE;
2945        }
2946        audioPortConfig = deviceDesc;
2947    } else {
2948        return BAD_VALUE;
2949    }
2950
2951    struct audio_port_config backupConfig;
2952    status_t status = audioPortConfig->applyAudioPortConfig(config, &backupConfig);
2953    if (status == NO_ERROR) {
2954        struct audio_port_config newConfig;
2955        audioPortConfig->toAudioPortConfig(&newConfig, config);
2956        status = mpClientInterface->setAudioPortConfig(&newConfig, 0);
2957    }
2958    if (status != NO_ERROR) {
2959        audioPortConfig->applyAudioPortConfig(&backupConfig);
2960    }
2961
2962    return status;
2963}
2964
2965void AudioPolicyManager::clearAudioPatches(uid_t uid)
2966{
2967    for (ssize_t i = (ssize_t)mAudioPatches.size() - 1; i >= 0; i--)  {
2968        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(i);
2969        if (patchDesc->mUid == uid) {
2970            releaseAudioPatch(mAudioPatches.keyAt(i), uid);
2971        }
2972    }
2973}
2974
2975status_t AudioPolicyManager::acquireSoundTriggerSession(audio_session_t *session,
2976                                       audio_io_handle_t *ioHandle,
2977                                       audio_devices_t *device)
2978{
2979    *session = (audio_session_t)mpClientInterface->newAudioUniqueId();
2980    *ioHandle = (audio_io_handle_t)mpClientInterface->newAudioUniqueId();
2981    *device = getDeviceAndMixForInputSource(AUDIO_SOURCE_HOTWORD);
2982
2983    mSoundTriggerSessions.add(*session, *ioHandle);
2984
2985    return NO_ERROR;
2986}
2987
2988status_t AudioPolicyManager::releaseSoundTriggerSession(audio_session_t session)
2989{
2990    ssize_t index = mSoundTriggerSessions.indexOfKey(session);
2991    if (index < 0) {
2992        ALOGW("acquireSoundTriggerSession() session %d not registered", session);
2993        return BAD_VALUE;
2994    }
2995
2996    mSoundTriggerSessions.removeItem(session);
2997    return NO_ERROR;
2998}
2999
3000status_t AudioPolicyManager::addAudioPatch(audio_patch_handle_t handle,
3001                                           const sp<AudioPatch>& patch)
3002{
3003    ssize_t index = mAudioPatches.indexOfKey(handle);
3004
3005    if (index >= 0) {
3006        ALOGW("addAudioPatch() patch %d already in", handle);
3007        return ALREADY_EXISTS;
3008    }
3009    mAudioPatches.add(handle, patch);
3010    ALOGV("addAudioPatch() handle %d af handle %d num_sources %d num_sinks %d source handle %d"
3011            "sink handle %d",
3012          handle, patch->mAfPatchHandle, patch->mPatch.num_sources, patch->mPatch.num_sinks,
3013          patch->mPatch.sources[0].id, patch->mPatch.sinks[0].id);
3014    return NO_ERROR;
3015}
3016
3017status_t AudioPolicyManager::removeAudioPatch(audio_patch_handle_t handle)
3018{
3019    ssize_t index = mAudioPatches.indexOfKey(handle);
3020
3021    if (index < 0) {
3022        ALOGW("removeAudioPatch() patch %d not in", handle);
3023        return ALREADY_EXISTS;
3024    }
3025    ALOGV("removeAudioPatch() handle %d af handle %d", handle,
3026                      mAudioPatches.valueAt(index)->mAfPatchHandle);
3027    mAudioPatches.removeItemsAt(index);
3028    return NO_ERROR;
3029}
3030
3031// ----------------------------------------------------------------------------
3032// AudioPolicyManager
3033// ----------------------------------------------------------------------------
3034
3035uint32_t AudioPolicyManager::nextUniqueId()
3036{
3037    return android_atomic_inc(&mNextUniqueId);
3038}
3039
3040uint32_t AudioPolicyManager::nextAudioPortGeneration()
3041{
3042    return android_atomic_inc(&mAudioPortGeneration);
3043}
3044
3045AudioPolicyManager::AudioPolicyManager(AudioPolicyClientInterface *clientInterface)
3046    :
3047#ifdef AUDIO_POLICY_TEST
3048    Thread(false),
3049#endif //AUDIO_POLICY_TEST
3050    mPrimaryOutput((audio_io_handle_t)0),
3051    mPhoneState(AUDIO_MODE_NORMAL),
3052    mLimitRingtoneVolume(false), mLastVoiceVolume(-1.0f),
3053    mTotalEffectsCpuLoad(0), mTotalEffectsMemory(0),
3054    mA2dpSuspended(false),
3055    mSpeakerDrcEnabled(false), mNextUniqueId(1),
3056    mAudioPortGeneration(1),
3057    mBeaconMuteRefCount(0),
3058    mBeaconPlayingRefCount(0),
3059    mBeaconMuted(false)
3060{
3061    mUidCached = getuid();
3062    mpClientInterface = clientInterface;
3063
3064    for (int i = 0; i < AUDIO_POLICY_FORCE_USE_CNT; i++) {
3065        mForceUse[i] = AUDIO_POLICY_FORCE_NONE;
3066    }
3067
3068    mDefaultOutputDevice = new DeviceDescriptor(String8(""), AUDIO_DEVICE_OUT_SPEAKER);
3069    if (loadAudioPolicyConfig(AUDIO_POLICY_VENDOR_CONFIG_FILE) != NO_ERROR) {
3070        if (loadAudioPolicyConfig(AUDIO_POLICY_CONFIG_FILE) != NO_ERROR) {
3071            ALOGE("could not load audio policy configuration file, setting defaults");
3072            defaultAudioPolicyConfig();
3073        }
3074    }
3075    // mAvailableOutputDevices and mAvailableInputDevices now contain all attached devices
3076
3077    // must be done after reading the policy
3078    initializeVolumeCurves();
3079
3080    // open all output streams needed to access attached devices
3081    audio_devices_t outputDeviceTypes = mAvailableOutputDevices.types();
3082    audio_devices_t inputDeviceTypes = mAvailableInputDevices.types() & ~AUDIO_DEVICE_BIT_IN;
3083    for (size_t i = 0; i < mHwModules.size(); i++) {
3084        mHwModules[i]->mHandle = mpClientInterface->loadHwModule(mHwModules[i]->mName);
3085        if (mHwModules[i]->mHandle == 0) {
3086            ALOGW("could not open HW module %s", mHwModules[i]->mName);
3087            continue;
3088        }
3089        // open all output streams needed to access attached devices
3090        // except for direct output streams that are only opened when they are actually
3091        // required by an app.
3092        // This also validates mAvailableOutputDevices list
3093        for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
3094        {
3095            const sp<IOProfile> outProfile = mHwModules[i]->mOutputProfiles[j];
3096
3097            if (outProfile->mSupportedDevices.isEmpty()) {
3098                ALOGW("Output profile contains no device on module %s", mHwModules[i]->mName);
3099                continue;
3100            }
3101
3102            if ((outProfile->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) != 0) {
3103                continue;
3104            }
3105            audio_devices_t profileType = outProfile->mSupportedDevices.types();
3106            if ((profileType & mDefaultOutputDevice->mDeviceType) != AUDIO_DEVICE_NONE) {
3107                profileType = mDefaultOutputDevice->mDeviceType;
3108            } else {
3109                // chose first device present in mSupportedDevices also part of
3110                // outputDeviceTypes
3111                for (size_t k = 0; k  < outProfile->mSupportedDevices.size(); k++) {
3112                    profileType = outProfile->mSupportedDevices[k]->mDeviceType;
3113                    if ((profileType & outputDeviceTypes) != 0) {
3114                        break;
3115                    }
3116                }
3117            }
3118            if ((profileType & outputDeviceTypes) == 0) {
3119                continue;
3120            }
3121            sp<AudioOutputDescriptor> outputDesc = new AudioOutputDescriptor(outProfile);
3122
3123            outputDesc->mDevice = profileType;
3124            audio_config_t config = AUDIO_CONFIG_INITIALIZER;
3125            config.sample_rate = outputDesc->mSamplingRate;
3126            config.channel_mask = outputDesc->mChannelMask;
3127            config.format = outputDesc->mFormat;
3128            audio_io_handle_t output = AUDIO_IO_HANDLE_NONE;
3129            status_t status = mpClientInterface->openOutput(outProfile->mModule->mHandle,
3130                                                            &output,
3131                                                            &config,
3132                                                            &outputDesc->mDevice,
3133                                                            String8(""),
3134                                                            &outputDesc->mLatency,
3135                                                            outputDesc->mFlags);
3136
3137            if (status != NO_ERROR) {
3138                ALOGW("Cannot open output stream for device %08x on hw module %s",
3139                      outputDesc->mDevice,
3140                      mHwModules[i]->mName);
3141            } else {
3142                outputDesc->mSamplingRate = config.sample_rate;
3143                outputDesc->mChannelMask = config.channel_mask;
3144                outputDesc->mFormat = config.format;
3145
3146                for (size_t k = 0; k  < outProfile->mSupportedDevices.size(); k++) {
3147                    audio_devices_t type = outProfile->mSupportedDevices[k]->mDeviceType;
3148                    ssize_t index =
3149                            mAvailableOutputDevices.indexOf(outProfile->mSupportedDevices[k]);
3150                    // give a valid ID to an attached device once confirmed it is reachable
3151                    if ((index >= 0) && (mAvailableOutputDevices[index]->mId == 0)) {
3152                        mAvailableOutputDevices[index]->mId = nextUniqueId();
3153                        mAvailableOutputDevices[index]->mModule = mHwModules[i];
3154                    }
3155                }
3156                if (mPrimaryOutput == 0 &&
3157                        outProfile->mFlags & AUDIO_OUTPUT_FLAG_PRIMARY) {
3158                    mPrimaryOutput = output;
3159                }
3160                addOutput(output, outputDesc);
3161                setOutputDevice(output,
3162                                outputDesc->mDevice,
3163                                true);
3164            }
3165        }
3166        // open input streams needed to access attached devices to validate
3167        // mAvailableInputDevices list
3168        for (size_t j = 0; j < mHwModules[i]->mInputProfiles.size(); j++)
3169        {
3170            const sp<IOProfile> inProfile = mHwModules[i]->mInputProfiles[j];
3171
3172            if (inProfile->mSupportedDevices.isEmpty()) {
3173                ALOGW("Input profile contains no device on module %s", mHwModules[i]->mName);
3174                continue;
3175            }
3176            // chose first device present in mSupportedDevices also part of
3177            // inputDeviceTypes
3178            audio_devices_t profileType = AUDIO_DEVICE_NONE;
3179            for (size_t k = 0; k  < inProfile->mSupportedDevices.size(); k++) {
3180                profileType = inProfile->mSupportedDevices[k]->mDeviceType;
3181                if (profileType & inputDeviceTypes) {
3182                    break;
3183                }
3184            }
3185            if ((profileType & inputDeviceTypes) == 0) {
3186                continue;
3187            }
3188            sp<AudioInputDescriptor> inputDesc = new AudioInputDescriptor(inProfile);
3189
3190            inputDesc->mInputSource = AUDIO_SOURCE_MIC;
3191            inputDesc->mDevice = profileType;
3192
3193            // find the address
3194            DeviceVector inputDevices = mAvailableInputDevices.getDevicesFromType(profileType);
3195            //   the inputs vector must be of size 1, but we don't want to crash here
3196            String8 address = inputDevices.size() > 0 ? inputDevices.itemAt(0)->mAddress
3197                    : String8("");
3198            ALOGV("  for input device 0x%x using address %s", profileType, address.string());
3199            ALOGE_IF(inputDevices.size() == 0, "Input device list is empty!");
3200
3201            audio_config_t config = AUDIO_CONFIG_INITIALIZER;
3202            config.sample_rate = inputDesc->mSamplingRate;
3203            config.channel_mask = inputDesc->mChannelMask;
3204            config.format = inputDesc->mFormat;
3205            audio_io_handle_t input = AUDIO_IO_HANDLE_NONE;
3206            status_t status = mpClientInterface->openInput(inProfile->mModule->mHandle,
3207                                                           &input,
3208                                                           &config,
3209                                                           &inputDesc->mDevice,
3210                                                           address,
3211                                                           AUDIO_SOURCE_MIC,
3212                                                           AUDIO_INPUT_FLAG_NONE);
3213
3214            if (status == NO_ERROR) {
3215                for (size_t k = 0; k  < inProfile->mSupportedDevices.size(); k++) {
3216                    audio_devices_t type = inProfile->mSupportedDevices[k]->mDeviceType;
3217                    ssize_t index =
3218                            mAvailableInputDevices.indexOf(inProfile->mSupportedDevices[k]);
3219                    // give a valid ID to an attached device once confirmed it is reachable
3220                    if ((index >= 0) && (mAvailableInputDevices[index]->mId == 0)) {
3221                        mAvailableInputDevices[index]->mId = nextUniqueId();
3222                        mAvailableInputDevices[index]->mModule = mHwModules[i];
3223                    }
3224                }
3225                mpClientInterface->closeInput(input);
3226            } else {
3227                ALOGW("Cannot open input stream for device %08x on hw module %s",
3228                      inputDesc->mDevice,
3229                      mHwModules[i]->mName);
3230            }
3231        }
3232    }
3233    // make sure all attached devices have been allocated a unique ID
3234    for (size_t i = 0; i  < mAvailableOutputDevices.size();) {
3235        if (mAvailableOutputDevices[i]->mId == 0) {
3236            ALOGW("Input device %08x unreachable", mAvailableOutputDevices[i]->mDeviceType);
3237            mAvailableOutputDevices.remove(mAvailableOutputDevices[i]);
3238            continue;
3239        }
3240        i++;
3241    }
3242    for (size_t i = 0; i  < mAvailableInputDevices.size();) {
3243        if (mAvailableInputDevices[i]->mId == 0) {
3244            ALOGW("Input device %08x unreachable", mAvailableInputDevices[i]->mDeviceType);
3245            mAvailableInputDevices.remove(mAvailableInputDevices[i]);
3246            continue;
3247        }
3248        i++;
3249    }
3250    // make sure default device is reachable
3251    if (mAvailableOutputDevices.indexOf(mDefaultOutputDevice) < 0) {
3252        ALOGE("Default device %08x is unreachable", mDefaultOutputDevice->mDeviceType);
3253    }
3254
3255    ALOGE_IF((mPrimaryOutput == 0), "Failed to open primary output");
3256
3257    updateDevicesAndOutputs();
3258
3259#ifdef AUDIO_POLICY_TEST
3260    if (mPrimaryOutput != 0) {
3261        AudioParameter outputCmd = AudioParameter();
3262        outputCmd.addInt(String8("set_id"), 0);
3263        mpClientInterface->setParameters(mPrimaryOutput, outputCmd.toString());
3264
3265        mTestDevice = AUDIO_DEVICE_OUT_SPEAKER;
3266        mTestSamplingRate = 44100;
3267        mTestFormat = AUDIO_FORMAT_PCM_16_BIT;
3268        mTestChannels =  AUDIO_CHANNEL_OUT_STEREO;
3269        mTestLatencyMs = 0;
3270        mCurOutput = 0;
3271        mDirectOutput = false;
3272        for (int i = 0; i < NUM_TEST_OUTPUTS; i++) {
3273            mTestOutputs[i] = 0;
3274        }
3275
3276        const size_t SIZE = 256;
3277        char buffer[SIZE];
3278        snprintf(buffer, SIZE, "AudioPolicyManagerTest");
3279        run(buffer, ANDROID_PRIORITY_AUDIO);
3280    }
3281#endif //AUDIO_POLICY_TEST
3282}
3283
3284AudioPolicyManager::~AudioPolicyManager()
3285{
3286#ifdef AUDIO_POLICY_TEST
3287    exit();
3288#endif //AUDIO_POLICY_TEST
3289   for (size_t i = 0; i < mOutputs.size(); i++) {
3290        mpClientInterface->closeOutput(mOutputs.keyAt(i));
3291   }
3292   for (size_t i = 0; i < mInputs.size(); i++) {
3293        mpClientInterface->closeInput(mInputs.keyAt(i));
3294   }
3295   mAvailableOutputDevices.clear();
3296   mAvailableInputDevices.clear();
3297   mOutputs.clear();
3298   mInputs.clear();
3299   mHwModules.clear();
3300}
3301
3302status_t AudioPolicyManager::initCheck()
3303{
3304    return (mPrimaryOutput == 0) ? NO_INIT : NO_ERROR;
3305}
3306
3307#ifdef AUDIO_POLICY_TEST
3308bool AudioPolicyManager::threadLoop()
3309{
3310    ALOGV("entering threadLoop()");
3311    while (!exitPending())
3312    {
3313        String8 command;
3314        int valueInt;
3315        String8 value;
3316
3317        Mutex::Autolock _l(mLock);
3318        mWaitWorkCV.waitRelative(mLock, milliseconds(50));
3319
3320        command = mpClientInterface->getParameters(0, String8("test_cmd_policy"));
3321        AudioParameter param = AudioParameter(command);
3322
3323        if (param.getInt(String8("test_cmd_policy"), valueInt) == NO_ERROR &&
3324            valueInt != 0) {
3325            ALOGV("Test command %s received", command.string());
3326            String8 target;
3327            if (param.get(String8("target"), target) != NO_ERROR) {
3328                target = "Manager";
3329            }
3330            if (param.getInt(String8("test_cmd_policy_output"), valueInt) == NO_ERROR) {
3331                param.remove(String8("test_cmd_policy_output"));
3332                mCurOutput = valueInt;
3333            }
3334            if (param.get(String8("test_cmd_policy_direct"), value) == NO_ERROR) {
3335                param.remove(String8("test_cmd_policy_direct"));
3336                if (value == "false") {
3337                    mDirectOutput = false;
3338                } else if (value == "true") {
3339                    mDirectOutput = true;
3340                }
3341            }
3342            if (param.getInt(String8("test_cmd_policy_input"), valueInt) == NO_ERROR) {
3343                param.remove(String8("test_cmd_policy_input"));
3344                mTestInput = valueInt;
3345            }
3346
3347            if (param.get(String8("test_cmd_policy_format"), value) == NO_ERROR) {
3348                param.remove(String8("test_cmd_policy_format"));
3349                int format = AUDIO_FORMAT_INVALID;
3350                if (value == "PCM 16 bits") {
3351                    format = AUDIO_FORMAT_PCM_16_BIT;
3352                } else if (value == "PCM 8 bits") {
3353                    format = AUDIO_FORMAT_PCM_8_BIT;
3354                } else if (value == "Compressed MP3") {
3355                    format = AUDIO_FORMAT_MP3;
3356                }
3357                if (format != AUDIO_FORMAT_INVALID) {
3358                    if (target == "Manager") {
3359                        mTestFormat = format;
3360                    } else if (mTestOutputs[mCurOutput] != 0) {
3361                        AudioParameter outputParam = AudioParameter();
3362                        outputParam.addInt(String8("format"), format);
3363                        mpClientInterface->setParameters(mTestOutputs[mCurOutput], outputParam.toString());
3364                    }
3365                }
3366            }
3367            if (param.get(String8("test_cmd_policy_channels"), value) == NO_ERROR) {
3368                param.remove(String8("test_cmd_policy_channels"));
3369                int channels = 0;
3370
3371                if (value == "Channels Stereo") {
3372                    channels =  AUDIO_CHANNEL_OUT_STEREO;
3373                } else if (value == "Channels Mono") {
3374                    channels =  AUDIO_CHANNEL_OUT_MONO;
3375                }
3376                if (channels != 0) {
3377                    if (target == "Manager") {
3378                        mTestChannels = channels;
3379                    } else if (mTestOutputs[mCurOutput] != 0) {
3380                        AudioParameter outputParam = AudioParameter();
3381                        outputParam.addInt(String8("channels"), channels);
3382                        mpClientInterface->setParameters(mTestOutputs[mCurOutput], outputParam.toString());
3383                    }
3384                }
3385            }
3386            if (param.getInt(String8("test_cmd_policy_sampleRate"), valueInt) == NO_ERROR) {
3387                param.remove(String8("test_cmd_policy_sampleRate"));
3388                if (valueInt >= 0 && valueInt <= 96000) {
3389                    int samplingRate = valueInt;
3390                    if (target == "Manager") {
3391                        mTestSamplingRate = samplingRate;
3392                    } else if (mTestOutputs[mCurOutput] != 0) {
3393                        AudioParameter outputParam = AudioParameter();
3394                        outputParam.addInt(String8("sampling_rate"), samplingRate);
3395                        mpClientInterface->setParameters(mTestOutputs[mCurOutput], outputParam.toString());
3396                    }
3397                }
3398            }
3399
3400            if (param.get(String8("test_cmd_policy_reopen"), value) == NO_ERROR) {
3401                param.remove(String8("test_cmd_policy_reopen"));
3402
3403                sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(mPrimaryOutput);
3404                mpClientInterface->closeOutput(mPrimaryOutput);
3405
3406                audio_module_handle_t moduleHandle = outputDesc->mModule->mHandle;
3407
3408                mOutputs.removeItem(mPrimaryOutput);
3409
3410                sp<AudioOutputDescriptor> outputDesc = new AudioOutputDescriptor(NULL);
3411                outputDesc->mDevice = AUDIO_DEVICE_OUT_SPEAKER;
3412                audio_config_t config = AUDIO_CONFIG_INITIALIZER;
3413                config.sample_rate = outputDesc->mSamplingRate;
3414                config.channel_mask = outputDesc->mChannelMask;
3415                config.format = outputDesc->mFormat;
3416                status_t status = mpClientInterface->openOutput(moduleHandle,
3417                                                                &mPrimaryOutput,
3418                                                                &config,
3419                                                                &outputDesc->mDevice,
3420                                                                String8(""),
3421                                                                &outputDesc->mLatency,
3422                                                                outputDesc->mFlags);
3423                if (status != NO_ERROR) {
3424                    ALOGE("Failed to reopen hardware output stream, "
3425                        "samplingRate: %d, format %d, channels %d",
3426                        outputDesc->mSamplingRate, outputDesc->mFormat, outputDesc->mChannelMask);
3427                } else {
3428                    outputDesc->mSamplingRate = config.sample_rate;
3429                    outputDesc->mChannelMask = config.channel_mask;
3430                    outputDesc->mFormat = config.format;
3431                    AudioParameter outputCmd = AudioParameter();
3432                    outputCmd.addInt(String8("set_id"), 0);
3433                    mpClientInterface->setParameters(mPrimaryOutput, outputCmd.toString());
3434                    addOutput(mPrimaryOutput, outputDesc);
3435                }
3436            }
3437
3438
3439            mpClientInterface->setParameters(0, String8("test_cmd_policy="));
3440        }
3441    }
3442    return false;
3443}
3444
3445void AudioPolicyManager::exit()
3446{
3447    {
3448        AutoMutex _l(mLock);
3449        requestExit();
3450        mWaitWorkCV.signal();
3451    }
3452    requestExitAndWait();
3453}
3454
3455int AudioPolicyManager::testOutputIndex(audio_io_handle_t output)
3456{
3457    for (int i = 0; i < NUM_TEST_OUTPUTS; i++) {
3458        if (output == mTestOutputs[i]) return i;
3459    }
3460    return 0;
3461}
3462#endif //AUDIO_POLICY_TEST
3463
3464// ---
3465
3466void AudioPolicyManager::addOutput(audio_io_handle_t output, sp<AudioOutputDescriptor> outputDesc)
3467{
3468    outputDesc->mIoHandle = output;
3469    outputDesc->mId = nextUniqueId();
3470    mOutputs.add(output, outputDesc);
3471    nextAudioPortGeneration();
3472}
3473
3474void AudioPolicyManager::addInput(audio_io_handle_t input, sp<AudioInputDescriptor> inputDesc)
3475{
3476    inputDesc->mIoHandle = input;
3477    inputDesc->mId = nextUniqueId();
3478    mInputs.add(input, inputDesc);
3479    nextAudioPortGeneration();
3480}
3481
3482void AudioPolicyManager::findIoHandlesByAddress(sp<AudioOutputDescriptor> desc /*in*/,
3483        const audio_devices_t device /*in*/,
3484        const String8 address /*in*/,
3485        SortedVector<audio_io_handle_t>& outputs /*out*/) {
3486    sp<DeviceDescriptor> devDesc =
3487        desc->mProfile->mSupportedDevices.getDevice(device, address);
3488    if (devDesc != 0) {
3489        ALOGV("findIoHandlesByAddress(): adding opened output %d on same address %s",
3490              desc->mIoHandle, address.string());
3491        outputs.add(desc->mIoHandle);
3492    }
3493}
3494
3495status_t AudioPolicyManager::checkOutputsForDevice(const sp<DeviceDescriptor> devDesc,
3496                                                       audio_policy_dev_state_t state,
3497                                                       SortedVector<audio_io_handle_t>& outputs,
3498                                                       const String8 address)
3499{
3500    audio_devices_t device = devDesc->mDeviceType;
3501    sp<AudioOutputDescriptor> desc;
3502    // erase all current sample rates, formats and channel masks
3503    devDesc->clearCapabilities();
3504
3505    if (state == AUDIO_POLICY_DEVICE_STATE_AVAILABLE) {
3506        // first list already open outputs that can be routed to this device
3507        for (size_t i = 0; i < mOutputs.size(); i++) {
3508            desc = mOutputs.valueAt(i);
3509            if (!desc->isDuplicated() && (desc->mProfile->mSupportedDevices.types() & device)) {
3510                if (!deviceDistinguishesOnAddress(device)) {
3511                    ALOGV("checkOutputsForDevice(): adding opened output %d", mOutputs.keyAt(i));
3512                    outputs.add(mOutputs.keyAt(i));
3513                } else {
3514                    ALOGV("  checking address match due to device 0x%x", device);
3515                    findIoHandlesByAddress(desc, device, address, outputs);
3516                }
3517            }
3518        }
3519        // then look for output profiles that can be routed to this device
3520        SortedVector< sp<IOProfile> > profiles;
3521        for (size_t i = 0; i < mHwModules.size(); i++)
3522        {
3523            if (mHwModules[i]->mHandle == 0) {
3524                continue;
3525            }
3526            for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
3527            {
3528                sp<IOProfile> profile = mHwModules[i]->mOutputProfiles[j];
3529                if (profile->mSupportedDevices.types() & device) {
3530                    if (!deviceDistinguishesOnAddress(device) ||
3531                            address == profile->mSupportedDevices[0]->mAddress) {
3532                        profiles.add(profile);
3533                        ALOGV("checkOutputsForDevice(): adding profile %zu from module %zu", j, i);
3534                    }
3535                }
3536            }
3537        }
3538
3539        ALOGV("  found %d profiles, %d outputs", profiles.size(), outputs.size());
3540
3541        if (profiles.isEmpty() && outputs.isEmpty()) {
3542            ALOGW("checkOutputsForDevice(): No output available for device %04x", device);
3543            return BAD_VALUE;
3544        }
3545
3546        // open outputs for matching profiles if needed. Direct outputs are also opened to
3547        // query for dynamic parameters and will be closed later by setDeviceConnectionState()
3548        for (ssize_t profile_index = 0; profile_index < (ssize_t)profiles.size(); profile_index++) {
3549            sp<IOProfile> profile = profiles[profile_index];
3550
3551            // nothing to do if one output is already opened for this profile
3552            size_t j;
3553            for (j = 0; j < outputs.size(); j++) {
3554                desc = mOutputs.valueFor(outputs.itemAt(j));
3555                if (!desc->isDuplicated() && desc->mProfile == profile) {
3556                    // matching profile: save the sample rates, format and channel masks supported
3557                    // by the profile in our device descriptor
3558                    devDesc->importAudioPort(profile);
3559                    break;
3560                }
3561            }
3562            if (j != outputs.size()) {
3563                continue;
3564            }
3565
3566            ALOGV("opening output for device %08x with params %s profile %p",
3567                                                      device, address.string(), profile.get());
3568            desc = new AudioOutputDescriptor(profile);
3569            desc->mDevice = device;
3570            audio_config_t config = AUDIO_CONFIG_INITIALIZER;
3571            config.sample_rate = desc->mSamplingRate;
3572            config.channel_mask = desc->mChannelMask;
3573            config.format = desc->mFormat;
3574            config.offload_info.sample_rate = desc->mSamplingRate;
3575            config.offload_info.channel_mask = desc->mChannelMask;
3576            config.offload_info.format = desc->mFormat;
3577            audio_io_handle_t output = AUDIO_IO_HANDLE_NONE;
3578            status_t status = mpClientInterface->openOutput(profile->mModule->mHandle,
3579                                                            &output,
3580                                                            &config,
3581                                                            &desc->mDevice,
3582                                                            address,
3583                                                            &desc->mLatency,
3584                                                            desc->mFlags);
3585            if (status == NO_ERROR) {
3586                desc->mSamplingRate = config.sample_rate;
3587                desc->mChannelMask = config.channel_mask;
3588                desc->mFormat = config.format;
3589
3590                // Here is where the out_set_parameters() for card & device gets called
3591                if (!address.isEmpty()) {
3592                    char *param = audio_device_address_to_parameter(device, address);
3593                    mpClientInterface->setParameters(output, String8(param));
3594                    free(param);
3595                }
3596
3597                // Here is where we step through and resolve any "dynamic" fields
3598                String8 reply;
3599                char *value;
3600                if (profile->mSamplingRates[0] == 0) {
3601                    reply = mpClientInterface->getParameters(output,
3602                                            String8(AUDIO_PARAMETER_STREAM_SUP_SAMPLING_RATES));
3603                    ALOGV("checkOutputsForDevice() supported sampling rates %s",
3604                              reply.string());
3605                    value = strpbrk((char *)reply.string(), "=");
3606                    if (value != NULL) {
3607                        profile->loadSamplingRates(value + 1);
3608                    }
3609                }
3610                if (profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) {
3611                    reply = mpClientInterface->getParameters(output,
3612                                                   String8(AUDIO_PARAMETER_STREAM_SUP_FORMATS));
3613                    ALOGV("checkOutputsForDevice() supported formats %s",
3614                              reply.string());
3615                    value = strpbrk((char *)reply.string(), "=");
3616                    if (value != NULL) {
3617                        profile->loadFormats(value + 1);
3618                    }
3619                }
3620                if (profile->mChannelMasks[0] == 0) {
3621                    reply = mpClientInterface->getParameters(output,
3622                                                  String8(AUDIO_PARAMETER_STREAM_SUP_CHANNELS));
3623                    ALOGV("checkOutputsForDevice() supported channel masks %s",
3624                              reply.string());
3625                    value = strpbrk((char *)reply.string(), "=");
3626                    if (value != NULL) {
3627                        profile->loadOutChannels(value + 1);
3628                    }
3629                }
3630                if (((profile->mSamplingRates[0] == 0) &&
3631                         (profile->mSamplingRates.size() < 2)) ||
3632                     ((profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) &&
3633                         (profile->mFormats.size() < 2)) ||
3634                     ((profile->mChannelMasks[0] == 0) &&
3635                         (profile->mChannelMasks.size() < 2))) {
3636                    ALOGW("checkOutputsForDevice() missing param");
3637                    mpClientInterface->closeOutput(output);
3638                    output = AUDIO_IO_HANDLE_NONE;
3639                } else if (profile->mSamplingRates[0] == 0 || profile->mFormats[0] == 0 ||
3640                            profile->mChannelMasks[0] == 0) {
3641                    mpClientInterface->closeOutput(output);
3642                    config.sample_rate = profile->pickSamplingRate();
3643                    config.channel_mask = profile->pickChannelMask();
3644                    config.format = profile->pickFormat();
3645                    config.offload_info.sample_rate = config.sample_rate;
3646                    config.offload_info.channel_mask = config.channel_mask;
3647                    config.offload_info.format = config.format;
3648                    status = mpClientInterface->openOutput(profile->mModule->mHandle,
3649                                                           &output,
3650                                                           &config,
3651                                                           &desc->mDevice,
3652                                                           address,
3653                                                           &desc->mLatency,
3654                                                           desc->mFlags);
3655                    if (status == NO_ERROR) {
3656                        desc->mSamplingRate = config.sample_rate;
3657                        desc->mChannelMask = config.channel_mask;
3658                        desc->mFormat = config.format;
3659                    } else {
3660                        output = AUDIO_IO_HANDLE_NONE;
3661                    }
3662                }
3663
3664                if (output != AUDIO_IO_HANDLE_NONE) {
3665                    addOutput(output, desc);
3666                    if (deviceDistinguishesOnAddress(device) && address != "0") {
3667                        ssize_t index = mPolicyMixes.indexOfKey(address);
3668                        if (index >= 0) {
3669                            mPolicyMixes[index]->mOutput = desc;
3670                            desc->mPolicyMix = &mPolicyMixes[index]->mMix;
3671                        } else {
3672                            ALOGE("checkOutputsForDevice() cannot find policy for address %s",
3673                                  address.string());
3674                        }
3675                    } else if ((desc->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) == 0) {
3676                        // no duplicated output for direct outputs and
3677                        // outputs used by dynamic policy mixes
3678                        audio_io_handle_t duplicatedOutput = AUDIO_IO_HANDLE_NONE;
3679
3680                        // set initial stream volume for device
3681                        applyStreamVolumes(output, device, 0, true);
3682
3683                        //TODO: configure audio effect output stage here
3684
3685                        // open a duplicating output thread for the new output and the primary output
3686                        duplicatedOutput = mpClientInterface->openDuplicateOutput(output,
3687                                                                                  mPrimaryOutput);
3688                        if (duplicatedOutput != AUDIO_IO_HANDLE_NONE) {
3689                            // add duplicated output descriptor
3690                            sp<AudioOutputDescriptor> dupOutputDesc =
3691                                    new AudioOutputDescriptor(NULL);
3692                            dupOutputDesc->mOutput1 = mOutputs.valueFor(mPrimaryOutput);
3693                            dupOutputDesc->mOutput2 = mOutputs.valueFor(output);
3694                            dupOutputDesc->mSamplingRate = desc->mSamplingRate;
3695                            dupOutputDesc->mFormat = desc->mFormat;
3696                            dupOutputDesc->mChannelMask = desc->mChannelMask;
3697                            dupOutputDesc->mLatency = desc->mLatency;
3698                            addOutput(duplicatedOutput, dupOutputDesc);
3699                            applyStreamVolumes(duplicatedOutput, device, 0, true);
3700                        } else {
3701                            ALOGW("checkOutputsForDevice() could not open dup output for %d and %d",
3702                                    mPrimaryOutput, output);
3703                            mpClientInterface->closeOutput(output);
3704                            mOutputs.removeItem(output);
3705                            nextAudioPortGeneration();
3706                            output = AUDIO_IO_HANDLE_NONE;
3707                        }
3708                    }
3709                }
3710            } else {
3711                output = AUDIO_IO_HANDLE_NONE;
3712            }
3713            if (output == AUDIO_IO_HANDLE_NONE) {
3714                ALOGW("checkOutputsForDevice() could not open output for device %x", device);
3715                profiles.removeAt(profile_index);
3716                profile_index--;
3717            } else {
3718                outputs.add(output);
3719                devDesc->importAudioPort(profile);
3720
3721                if (deviceDistinguishesOnAddress(device)) {
3722                    ALOGV("checkOutputsForDevice(): setOutputDevice(dev=0x%x, addr=%s)",
3723                            device, address.string());
3724                    setOutputDevice(output, device, true/*force*/, 0/*delay*/,
3725                            NULL/*patch handle*/, address.string());
3726                }
3727                ALOGV("checkOutputsForDevice(): adding output %d", output);
3728            }
3729        }
3730
3731        if (profiles.isEmpty()) {
3732            ALOGW("checkOutputsForDevice(): No output available for device %04x", device);
3733            return BAD_VALUE;
3734        }
3735    } else { // Disconnect
3736        // check if one opened output is not needed any more after disconnecting one device
3737        for (size_t i = 0; i < mOutputs.size(); i++) {
3738            desc = mOutputs.valueAt(i);
3739            if (!desc->isDuplicated()) {
3740                // exact match on device
3741                if (deviceDistinguishesOnAddress(device) &&
3742                        (desc->mProfile->mSupportedDevices.types() == device)) {
3743                    findIoHandlesByAddress(desc, device, address, outputs);
3744                } else if (!(desc->mProfile->mSupportedDevices.types()
3745                        & mAvailableOutputDevices.types())) {
3746                    ALOGV("checkOutputsForDevice(): disconnecting adding output %d",
3747                            mOutputs.keyAt(i));
3748                    outputs.add(mOutputs.keyAt(i));
3749                }
3750            }
3751        }
3752        // Clear any profiles associated with the disconnected device.
3753        for (size_t i = 0; i < mHwModules.size(); i++)
3754        {
3755            if (mHwModules[i]->mHandle == 0) {
3756                continue;
3757            }
3758            for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
3759            {
3760                sp<IOProfile> profile = mHwModules[i]->mOutputProfiles[j];
3761                if (profile->mSupportedDevices.types() & device) {
3762                    ALOGV("checkOutputsForDevice(): "
3763                            "clearing direct output profile %zu on module %zu", j, i);
3764                    if (profile->mSamplingRates[0] == 0) {
3765                        profile->mSamplingRates.clear();
3766                        profile->mSamplingRates.add(0);
3767                    }
3768                    if (profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) {
3769                        profile->mFormats.clear();
3770                        profile->mFormats.add(AUDIO_FORMAT_DEFAULT);
3771                    }
3772                    if (profile->mChannelMasks[0] == 0) {
3773                        profile->mChannelMasks.clear();
3774                        profile->mChannelMasks.add(0);
3775                    }
3776                }
3777            }
3778        }
3779    }
3780    return NO_ERROR;
3781}
3782
3783status_t AudioPolicyManager::checkInputsForDevice(audio_devices_t device,
3784                                                      audio_policy_dev_state_t state,
3785                                                      SortedVector<audio_io_handle_t>& inputs,
3786                                                      const String8 address)
3787{
3788    sp<AudioInputDescriptor> desc;
3789    if (state == AUDIO_POLICY_DEVICE_STATE_AVAILABLE) {
3790        // first list already open inputs that can be routed to this device
3791        for (size_t input_index = 0; input_index < mInputs.size(); input_index++) {
3792            desc = mInputs.valueAt(input_index);
3793            if (desc->mProfile->mSupportedDevices.types() & (device & ~AUDIO_DEVICE_BIT_IN)) {
3794                ALOGV("checkInputsForDevice(): adding opened input %d", mInputs.keyAt(input_index));
3795               inputs.add(mInputs.keyAt(input_index));
3796            }
3797        }
3798
3799        // then look for input profiles that can be routed to this device
3800        SortedVector< sp<IOProfile> > profiles;
3801        for (size_t module_idx = 0; module_idx < mHwModules.size(); module_idx++)
3802        {
3803            if (mHwModules[module_idx]->mHandle == 0) {
3804                continue;
3805            }
3806            for (size_t profile_index = 0;
3807                 profile_index < mHwModules[module_idx]->mInputProfiles.size();
3808                 profile_index++)
3809            {
3810                sp<IOProfile> profile = mHwModules[module_idx]->mInputProfiles[profile_index];
3811
3812                if (profile->mSupportedDevices.types() & (device & ~AUDIO_DEVICE_BIT_IN)) {
3813                    if (!deviceDistinguishesOnAddress(device) ||
3814                            address == profile->mSupportedDevices[0]->mAddress) {
3815                        profiles.add(profile);
3816                        ALOGV("checkInputsForDevice(): adding profile %zu from module %zu",
3817                              profile_index, module_idx);
3818                    }
3819                }
3820            }
3821        }
3822
3823        if (profiles.isEmpty() && inputs.isEmpty()) {
3824            ALOGW("checkInputsForDevice(): No input available for device 0x%X", device);
3825            return BAD_VALUE;
3826        }
3827
3828        // open inputs for matching profiles if needed. Direct inputs are also opened to
3829        // query for dynamic parameters and will be closed later by setDeviceConnectionState()
3830        for (ssize_t profile_index = 0; profile_index < (ssize_t)profiles.size(); profile_index++) {
3831
3832            sp<IOProfile> profile = profiles[profile_index];
3833            // nothing to do if one input is already opened for this profile
3834            size_t input_index;
3835            for (input_index = 0; input_index < mInputs.size(); input_index++) {
3836                desc = mInputs.valueAt(input_index);
3837                if (desc->mProfile == profile) {
3838                    break;
3839                }
3840            }
3841            if (input_index != mInputs.size()) {
3842                continue;
3843            }
3844
3845            ALOGV("opening input for device 0x%X with params %s", device, address.string());
3846            desc = new AudioInputDescriptor(profile);
3847            desc->mDevice = device;
3848            audio_config_t config = AUDIO_CONFIG_INITIALIZER;
3849            config.sample_rate = desc->mSamplingRate;
3850            config.channel_mask = desc->mChannelMask;
3851            config.format = desc->mFormat;
3852            audio_io_handle_t input = AUDIO_IO_HANDLE_NONE;
3853            status_t status = mpClientInterface->openInput(profile->mModule->mHandle,
3854                                                           &input,
3855                                                           &config,
3856                                                           &desc->mDevice,
3857                                                           address,
3858                                                           AUDIO_SOURCE_MIC,
3859                                                           AUDIO_INPUT_FLAG_NONE /*FIXME*/);
3860
3861            if (status == NO_ERROR) {
3862                desc->mSamplingRate = config.sample_rate;
3863                desc->mChannelMask = config.channel_mask;
3864                desc->mFormat = config.format;
3865
3866                if (!address.isEmpty()) {
3867                    char *param = audio_device_address_to_parameter(device, address);
3868                    mpClientInterface->setParameters(input, String8(param));
3869                    free(param);
3870                }
3871
3872                // Here is where we step through and resolve any "dynamic" fields
3873                String8 reply;
3874                char *value;
3875                if (profile->mSamplingRates[0] == 0) {
3876                    reply = mpClientInterface->getParameters(input,
3877                                            String8(AUDIO_PARAMETER_STREAM_SUP_SAMPLING_RATES));
3878                    ALOGV("checkInputsForDevice() direct input sup sampling rates %s",
3879                              reply.string());
3880                    value = strpbrk((char *)reply.string(), "=");
3881                    if (value != NULL) {
3882                        profile->loadSamplingRates(value + 1);
3883                    }
3884                }
3885                if (profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) {
3886                    reply = mpClientInterface->getParameters(input,
3887                                                   String8(AUDIO_PARAMETER_STREAM_SUP_FORMATS));
3888                    ALOGV("checkInputsForDevice() direct input sup formats %s", reply.string());
3889                    value = strpbrk((char *)reply.string(), "=");
3890                    if (value != NULL) {
3891                        profile->loadFormats(value + 1);
3892                    }
3893                }
3894                if (profile->mChannelMasks[0] == 0) {
3895                    reply = mpClientInterface->getParameters(input,
3896                                                  String8(AUDIO_PARAMETER_STREAM_SUP_CHANNELS));
3897                    ALOGV("checkInputsForDevice() direct input sup channel masks %s",
3898                              reply.string());
3899                    value = strpbrk((char *)reply.string(), "=");
3900                    if (value != NULL) {
3901                        profile->loadInChannels(value + 1);
3902                    }
3903                }
3904                if (((profile->mSamplingRates[0] == 0) && (profile->mSamplingRates.size() < 2)) ||
3905                     ((profile->mFormats[0] == 0) && (profile->mFormats.size() < 2)) ||
3906                     ((profile->mChannelMasks[0] == 0) && (profile->mChannelMasks.size() < 2))) {
3907                    ALOGW("checkInputsForDevice() direct input missing param");
3908                    mpClientInterface->closeInput(input);
3909                    input = AUDIO_IO_HANDLE_NONE;
3910                }
3911
3912                if (input != 0) {
3913                    addInput(input, desc);
3914                }
3915            } // endif input != 0
3916
3917            if (input == AUDIO_IO_HANDLE_NONE) {
3918                ALOGW("checkInputsForDevice() could not open input for device 0x%X", device);
3919                profiles.removeAt(profile_index);
3920                profile_index--;
3921            } else {
3922                inputs.add(input);
3923                ALOGV("checkInputsForDevice(): adding input %d", input);
3924            }
3925        } // end scan profiles
3926
3927        if (profiles.isEmpty()) {
3928            ALOGW("checkInputsForDevice(): No input available for device 0x%X", device);
3929            return BAD_VALUE;
3930        }
3931    } else {
3932        // Disconnect
3933        // check if one opened input is not needed any more after disconnecting one device
3934        for (size_t input_index = 0; input_index < mInputs.size(); input_index++) {
3935            desc = mInputs.valueAt(input_index);
3936            if (!(desc->mProfile->mSupportedDevices.types() & mAvailableInputDevices.types() &
3937                    ~AUDIO_DEVICE_BIT_IN)) {
3938                ALOGV("checkInputsForDevice(): disconnecting adding input %d",
3939                      mInputs.keyAt(input_index));
3940                inputs.add(mInputs.keyAt(input_index));
3941            }
3942        }
3943        // Clear any profiles associated with the disconnected device.
3944        for (size_t module_index = 0; module_index < mHwModules.size(); module_index++) {
3945            if (mHwModules[module_index]->mHandle == 0) {
3946                continue;
3947            }
3948            for (size_t profile_index = 0;
3949                 profile_index < mHwModules[module_index]->mInputProfiles.size();
3950                 profile_index++) {
3951                sp<IOProfile> profile = mHwModules[module_index]->mInputProfiles[profile_index];
3952                if (profile->mSupportedDevices.types() & device & ~AUDIO_DEVICE_BIT_IN) {
3953                    ALOGV("checkInputsForDevice(): clearing direct input profile %zu on module %zu",
3954                          profile_index, module_index);
3955                    if (profile->mSamplingRates[0] == 0) {
3956                        profile->mSamplingRates.clear();
3957                        profile->mSamplingRates.add(0);
3958                    }
3959                    if (profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) {
3960                        profile->mFormats.clear();
3961                        profile->mFormats.add(AUDIO_FORMAT_DEFAULT);
3962                    }
3963                    if (profile->mChannelMasks[0] == 0) {
3964                        profile->mChannelMasks.clear();
3965                        profile->mChannelMasks.add(0);
3966                    }
3967                }
3968            }
3969        }
3970    } // end disconnect
3971
3972    return NO_ERROR;
3973}
3974
3975
3976void AudioPolicyManager::closeOutput(audio_io_handle_t output)
3977{
3978    ALOGV("closeOutput(%d)", output);
3979
3980    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
3981    if (outputDesc == NULL) {
3982        ALOGW("closeOutput() unknown output %d", output);
3983        return;
3984    }
3985
3986    for (size_t i = 0; i < mPolicyMixes.size(); i++) {
3987        if (mPolicyMixes[i]->mOutput == outputDesc) {
3988            mPolicyMixes[i]->mOutput.clear();
3989        }
3990    }
3991
3992    // look for duplicated outputs connected to the output being removed.
3993    for (size_t i = 0; i < mOutputs.size(); i++) {
3994        sp<AudioOutputDescriptor> dupOutputDesc = mOutputs.valueAt(i);
3995        if (dupOutputDesc->isDuplicated() &&
3996                (dupOutputDesc->mOutput1 == outputDesc ||
3997                dupOutputDesc->mOutput2 == outputDesc)) {
3998            sp<AudioOutputDescriptor> outputDesc2;
3999            if (dupOutputDesc->mOutput1 == outputDesc) {
4000                outputDesc2 = dupOutputDesc->mOutput2;
4001            } else {
4002                outputDesc2 = dupOutputDesc->mOutput1;
4003            }
4004            // As all active tracks on duplicated output will be deleted,
4005            // and as they were also referenced on the other output, the reference
4006            // count for their stream type must be adjusted accordingly on
4007            // the other output.
4008            for (int j = 0; j < AUDIO_STREAM_CNT; j++) {
4009                int refCount = dupOutputDesc->mRefCount[j];
4010                outputDesc2->changeRefCount((audio_stream_type_t)j,-refCount);
4011            }
4012            audio_io_handle_t duplicatedOutput = mOutputs.keyAt(i);
4013            ALOGV("closeOutput() closing also duplicated output %d", duplicatedOutput);
4014
4015            mpClientInterface->closeOutput(duplicatedOutput);
4016            mOutputs.removeItem(duplicatedOutput);
4017        }
4018    }
4019
4020    nextAudioPortGeneration();
4021
4022    ssize_t index = mAudioPatches.indexOfKey(outputDesc->mPatchHandle);
4023    if (index >= 0) {
4024        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
4025        status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, 0);
4026        mAudioPatches.removeItemsAt(index);
4027        mpClientInterface->onAudioPatchListUpdate();
4028    }
4029
4030    AudioParameter param;
4031    param.add(String8("closing"), String8("true"));
4032    mpClientInterface->setParameters(output, param.toString());
4033
4034    mpClientInterface->closeOutput(output);
4035    mOutputs.removeItem(output);
4036    mPreviousOutputs = mOutputs;
4037}
4038
4039void AudioPolicyManager::closeInput(audio_io_handle_t input)
4040{
4041    ALOGV("closeInput(%d)", input);
4042
4043    sp<AudioInputDescriptor> inputDesc = mInputs.valueFor(input);
4044    if (inputDesc == NULL) {
4045        ALOGW("closeInput() unknown input %d", input);
4046        return;
4047    }
4048
4049    nextAudioPortGeneration();
4050
4051    ssize_t index = mAudioPatches.indexOfKey(inputDesc->mPatchHandle);
4052    if (index >= 0) {
4053        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
4054        status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, 0);
4055        mAudioPatches.removeItemsAt(index);
4056        mpClientInterface->onAudioPatchListUpdate();
4057    }
4058
4059    mpClientInterface->closeInput(input);
4060    mInputs.removeItem(input);
4061}
4062
4063SortedVector<audio_io_handle_t> AudioPolicyManager::getOutputsForDevice(audio_devices_t device,
4064                        DefaultKeyedVector<audio_io_handle_t, sp<AudioOutputDescriptor> > openOutputs)
4065{
4066    SortedVector<audio_io_handle_t> outputs;
4067
4068    ALOGVV("getOutputsForDevice() device %04x", device);
4069    for (size_t i = 0; i < openOutputs.size(); i++) {
4070        ALOGVV("output %d isDuplicated=%d device=%04x",
4071                i, openOutputs.valueAt(i)->isDuplicated(), openOutputs.valueAt(i)->supportedDevices());
4072        if ((device & openOutputs.valueAt(i)->supportedDevices()) == device) {
4073            ALOGVV("getOutputsForDevice() found output %d", openOutputs.keyAt(i));
4074            outputs.add(openOutputs.keyAt(i));
4075        }
4076    }
4077    return outputs;
4078}
4079
4080bool AudioPolicyManager::vectorsEqual(SortedVector<audio_io_handle_t>& outputs1,
4081                                   SortedVector<audio_io_handle_t>& outputs2)
4082{
4083    if (outputs1.size() != outputs2.size()) {
4084        return false;
4085    }
4086    for (size_t i = 0; i < outputs1.size(); i++) {
4087        if (outputs1[i] != outputs2[i]) {
4088            return false;
4089        }
4090    }
4091    return true;
4092}
4093
4094void AudioPolicyManager::checkOutputForStrategy(routing_strategy strategy)
4095{
4096    audio_devices_t oldDevice = getDeviceForStrategy(strategy, true /*fromCache*/);
4097    audio_devices_t newDevice = getDeviceForStrategy(strategy, false /*fromCache*/);
4098    SortedVector<audio_io_handle_t> srcOutputs = getOutputsForDevice(oldDevice, mPreviousOutputs);
4099    SortedVector<audio_io_handle_t> dstOutputs = getOutputsForDevice(newDevice, mOutputs);
4100
4101    // also take into account external policy-related changes: add all outputs which are
4102    // associated with policies in the "before" and "after" output vectors
4103    ALOGVV("checkOutputForStrategy(): policy related outputs");
4104    for (size_t i = 0 ; i < mPreviousOutputs.size() ; i++) {
4105        const sp<AudioOutputDescriptor> desc = mPreviousOutputs.valueAt(i);
4106        if (desc != 0 && desc->mPolicyMix != NULL) {
4107            srcOutputs.add(desc->mIoHandle);
4108            ALOGVV(" previous outputs: adding %d", desc->mIoHandle);
4109        }
4110    }
4111    for (size_t i = 0 ; i < mOutputs.size() ; i++) {
4112        const sp<AudioOutputDescriptor> desc = mOutputs.valueAt(i);
4113        if (desc != 0 && desc->mPolicyMix != NULL) {
4114            dstOutputs.add(desc->mIoHandle);
4115            ALOGVV(" new outputs: adding %d", desc->mIoHandle);
4116        }
4117    }
4118
4119    if (!vectorsEqual(srcOutputs,dstOutputs)) {
4120        ALOGV("checkOutputForStrategy() strategy %d, moving from output %d to output %d",
4121              strategy, srcOutputs[0], dstOutputs[0]);
4122        // mute strategy while moving tracks from one output to another
4123        for (size_t i = 0; i < srcOutputs.size(); i++) {
4124            sp<AudioOutputDescriptor> desc = mOutputs.valueFor(srcOutputs[i]);
4125            if (desc->isStrategyActive(strategy)) {
4126                setStrategyMute(strategy, true, srcOutputs[i]);
4127                setStrategyMute(strategy, false, srcOutputs[i], MUTE_TIME_MS, newDevice);
4128            }
4129        }
4130
4131        // Move effects associated to this strategy from previous output to new output
4132        if (strategy == STRATEGY_MEDIA) {
4133            audio_io_handle_t fxOutput = selectOutputForEffects(dstOutputs);
4134            SortedVector<audio_io_handle_t> moved;
4135            for (size_t i = 0; i < mEffects.size(); i++) {
4136                sp<EffectDescriptor> effectDesc = mEffects.valueAt(i);
4137                if (effectDesc->mSession == AUDIO_SESSION_OUTPUT_MIX &&
4138                        effectDesc->mIo != fxOutput) {
4139                    if (moved.indexOf(effectDesc->mIo) < 0) {
4140                        ALOGV("checkOutputForStrategy() moving effect %d to output %d",
4141                              mEffects.keyAt(i), fxOutput);
4142                        mpClientInterface->moveEffects(AUDIO_SESSION_OUTPUT_MIX, effectDesc->mIo,
4143                                                       fxOutput);
4144                        moved.add(effectDesc->mIo);
4145                    }
4146                    effectDesc->mIo = fxOutput;
4147                }
4148            }
4149        }
4150        // Move tracks associated to this strategy from previous output to new output
4151        for (int i = 0; i < AUDIO_STREAM_CNT; i++) {
4152            if (i == AUDIO_STREAM_PATCH) {
4153                continue;
4154            }
4155            if (getStrategy((audio_stream_type_t)i) == strategy) {
4156                mpClientInterface->invalidateStream((audio_stream_type_t)i);
4157            }
4158        }
4159    }
4160}
4161
4162void AudioPolicyManager::checkOutputForAllStrategies()
4163{
4164    if (mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] == AUDIO_POLICY_FORCE_SYSTEM_ENFORCED)
4165        checkOutputForStrategy(STRATEGY_ENFORCED_AUDIBLE);
4166    checkOutputForStrategy(STRATEGY_PHONE);
4167    if (mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] != AUDIO_POLICY_FORCE_SYSTEM_ENFORCED)
4168        checkOutputForStrategy(STRATEGY_ENFORCED_AUDIBLE);
4169    checkOutputForStrategy(STRATEGY_SONIFICATION);
4170    checkOutputForStrategy(STRATEGY_SONIFICATION_RESPECTFUL);
4171    checkOutputForStrategy(STRATEGY_ACCESSIBILITY);
4172    checkOutputForStrategy(STRATEGY_MEDIA);
4173    checkOutputForStrategy(STRATEGY_DTMF);
4174    checkOutputForStrategy(STRATEGY_REROUTING);
4175}
4176
4177audio_io_handle_t AudioPolicyManager::getA2dpOutput()
4178{
4179    for (size_t i = 0; i < mOutputs.size(); i++) {
4180        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(i);
4181        if (!outputDesc->isDuplicated() && outputDesc->device() & AUDIO_DEVICE_OUT_ALL_A2DP) {
4182            return mOutputs.keyAt(i);
4183        }
4184    }
4185
4186    return 0;
4187}
4188
4189void AudioPolicyManager::checkA2dpSuspend()
4190{
4191    audio_io_handle_t a2dpOutput = getA2dpOutput();
4192    if (a2dpOutput == 0) {
4193        mA2dpSuspended = false;
4194        return;
4195    }
4196
4197    bool isScoConnected =
4198            ((mAvailableInputDevices.types() & AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET &
4199                    ~AUDIO_DEVICE_BIT_IN) != 0) ||
4200            ((mAvailableOutputDevices.types() & AUDIO_DEVICE_OUT_ALL_SCO) != 0);
4201    // suspend A2DP output if:
4202    //      (NOT already suspended) &&
4203    //      ((SCO device is connected &&
4204    //       (forced usage for communication || for record is SCO))) ||
4205    //      (phone state is ringing || in call)
4206    //
4207    // restore A2DP output if:
4208    //      (Already suspended) &&
4209    //      ((SCO device is NOT connected ||
4210    //       (forced usage NOT for communication && NOT for record is SCO))) &&
4211    //      (phone state is NOT ringing && NOT in call)
4212    //
4213    if (mA2dpSuspended) {
4214        if ((!isScoConnected ||
4215             ((mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION] != AUDIO_POLICY_FORCE_BT_SCO) &&
4216              (mForceUse[AUDIO_POLICY_FORCE_FOR_RECORD] != AUDIO_POLICY_FORCE_BT_SCO))) &&
4217             ((mPhoneState != AUDIO_MODE_IN_CALL) &&
4218              (mPhoneState != AUDIO_MODE_RINGTONE))) {
4219
4220            mpClientInterface->restoreOutput(a2dpOutput);
4221            mA2dpSuspended = false;
4222        }
4223    } else {
4224        if ((isScoConnected &&
4225             ((mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION] == AUDIO_POLICY_FORCE_BT_SCO) ||
4226              (mForceUse[AUDIO_POLICY_FORCE_FOR_RECORD] == AUDIO_POLICY_FORCE_BT_SCO))) ||
4227             ((mPhoneState == AUDIO_MODE_IN_CALL) ||
4228              (mPhoneState == AUDIO_MODE_RINGTONE))) {
4229
4230            mpClientInterface->suspendOutput(a2dpOutput);
4231            mA2dpSuspended = true;
4232        }
4233    }
4234}
4235
4236audio_devices_t AudioPolicyManager::getNewOutputDevice(audio_io_handle_t output, bool fromCache)
4237{
4238    audio_devices_t device = AUDIO_DEVICE_NONE;
4239
4240    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
4241
4242    ssize_t index = mAudioPatches.indexOfKey(outputDesc->mPatchHandle);
4243    if (index >= 0) {
4244        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
4245        if (patchDesc->mUid != mUidCached) {
4246            ALOGV("getNewOutputDevice() device %08x forced by patch %d",
4247                  outputDesc->device(), outputDesc->mPatchHandle);
4248            return outputDesc->device();
4249        }
4250    }
4251
4252    // check the following by order of priority to request a routing change if necessary:
4253    // 1: the strategy enforced audible is active and enforced on the output:
4254    //      use device for strategy enforced audible
4255    // 2: we are in call or the strategy phone is active on the output:
4256    //      use device for strategy phone
4257    // 3: the strategy for enforced audible is active but not enforced on the output:
4258    //      use the device for strategy enforced audible
4259    // 4: the strategy sonification is active on the output:
4260    //      use device for strategy sonification
4261    // 5: the strategy "respectful" sonification is active on the output:
4262    //      use device for strategy "respectful" sonification
4263    // 6: the strategy accessibility is active on the output:
4264    //      use device for strategy accessibility
4265    // 7: the strategy media is active on the output:
4266    //      use device for strategy media
4267    // 8: the strategy DTMF is active on the output:
4268    //      use device for strategy DTMF
4269    // 9: the strategy for beacon, a.k.a. "transmitted through speaker" is active on the output:
4270    //      use device for strategy t-t-s
4271    if (outputDesc->isStrategyActive(STRATEGY_ENFORCED_AUDIBLE) &&
4272        mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] == AUDIO_POLICY_FORCE_SYSTEM_ENFORCED) {
4273        device = getDeviceForStrategy(STRATEGY_ENFORCED_AUDIBLE, fromCache);
4274    } else if (isInCall() ||
4275                    outputDesc->isStrategyActive(STRATEGY_PHONE)) {
4276        device = getDeviceForStrategy(STRATEGY_PHONE, fromCache);
4277    } else if (outputDesc->isStrategyActive(STRATEGY_ENFORCED_AUDIBLE)) {
4278        device = getDeviceForStrategy(STRATEGY_ENFORCED_AUDIBLE, fromCache);
4279    } else if (outputDesc->isStrategyActive(STRATEGY_SONIFICATION)) {
4280        device = getDeviceForStrategy(STRATEGY_SONIFICATION, fromCache);
4281    } else if (outputDesc->isStrategyActive(STRATEGY_SONIFICATION_RESPECTFUL)) {
4282        device = getDeviceForStrategy(STRATEGY_SONIFICATION_RESPECTFUL, fromCache);
4283    } else if (outputDesc->isStrategyActive(STRATEGY_ACCESSIBILITY)) {
4284        device = getDeviceForStrategy(STRATEGY_ACCESSIBILITY, fromCache);
4285    } else if (outputDesc->isStrategyActive(STRATEGY_MEDIA)) {
4286        device = getDeviceForStrategy(STRATEGY_MEDIA, fromCache);
4287    } else if (outputDesc->isStrategyActive(STRATEGY_DTMF)) {
4288        device = getDeviceForStrategy(STRATEGY_DTMF, fromCache);
4289    } else if (outputDesc->isStrategyActive(STRATEGY_TRANSMITTED_THROUGH_SPEAKER)) {
4290        device = getDeviceForStrategy(STRATEGY_TRANSMITTED_THROUGH_SPEAKER, fromCache);
4291    } else if (outputDesc->isStrategyActive(STRATEGY_REROUTING)) {
4292        device = getDeviceForStrategy(STRATEGY_REROUTING, fromCache);
4293    }
4294
4295    ALOGV("getNewOutputDevice() selected device %x", device);
4296    return device;
4297}
4298
4299audio_devices_t AudioPolicyManager::getNewInputDevice(audio_io_handle_t input)
4300{
4301    sp<AudioInputDescriptor> inputDesc = mInputs.valueFor(input);
4302
4303    ssize_t index = mAudioPatches.indexOfKey(inputDesc->mPatchHandle);
4304    if (index >= 0) {
4305        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
4306        if (patchDesc->mUid != mUidCached) {
4307            ALOGV("getNewInputDevice() device %08x forced by patch %d",
4308                  inputDesc->mDevice, inputDesc->mPatchHandle);
4309            return inputDesc->mDevice;
4310        }
4311    }
4312
4313    audio_devices_t device = getDeviceAndMixForInputSource(inputDesc->mInputSource);
4314
4315    ALOGV("getNewInputDevice() selected device %x", device);
4316    return device;
4317}
4318
4319uint32_t AudioPolicyManager::getStrategyForStream(audio_stream_type_t stream) {
4320    return (uint32_t)getStrategy(stream);
4321}
4322
4323audio_devices_t AudioPolicyManager::getDevicesForStream(audio_stream_type_t stream) {
4324    // By checking the range of stream before calling getStrategy, we avoid
4325    // getStrategy's behavior for invalid streams.  getStrategy would do a ALOGE
4326    // and then return STRATEGY_MEDIA, but we want to return the empty set.
4327    if (stream < (audio_stream_type_t) 0 || stream >= AUDIO_STREAM_PUBLIC_CNT) {
4328        return AUDIO_DEVICE_NONE;
4329    }
4330    audio_devices_t devices;
4331    AudioPolicyManager::routing_strategy strategy = getStrategy(stream);
4332    devices = getDeviceForStrategy(strategy, true /*fromCache*/);
4333    SortedVector<audio_io_handle_t> outputs = getOutputsForDevice(devices, mOutputs);
4334    for (size_t i = 0; i < outputs.size(); i++) {
4335        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(outputs[i]);
4336        if (outputDesc->isStrategyActive(strategy)) {
4337            devices = outputDesc->device();
4338            break;
4339        }
4340    }
4341
4342    /*Filter SPEAKER_SAFE out of results, as AudioService doesn't know about it
4343      and doesn't really need to.*/
4344    if (devices & AUDIO_DEVICE_OUT_SPEAKER_SAFE) {
4345        devices |= AUDIO_DEVICE_OUT_SPEAKER;
4346        devices &= ~AUDIO_DEVICE_OUT_SPEAKER_SAFE;
4347    }
4348
4349    return devices;
4350}
4351
4352AudioPolicyManager::routing_strategy AudioPolicyManager::getStrategy(
4353        audio_stream_type_t stream) {
4354
4355    ALOG_ASSERT(stream != AUDIO_STREAM_PATCH,"getStrategy() called for AUDIO_STREAM_PATCH");
4356
4357    // stream to strategy mapping
4358    switch (stream) {
4359    case AUDIO_STREAM_VOICE_CALL:
4360    case AUDIO_STREAM_BLUETOOTH_SCO:
4361        return STRATEGY_PHONE;
4362    case AUDIO_STREAM_RING:
4363    case AUDIO_STREAM_ALARM:
4364        return STRATEGY_SONIFICATION;
4365    case AUDIO_STREAM_NOTIFICATION:
4366        return STRATEGY_SONIFICATION_RESPECTFUL;
4367    case AUDIO_STREAM_DTMF:
4368        return STRATEGY_DTMF;
4369    default:
4370        ALOGE("unknown stream type %d", stream);
4371    case AUDIO_STREAM_SYSTEM:
4372        // NOTE: SYSTEM stream uses MEDIA strategy because muting music and switching outputs
4373        // while key clicks are played produces a poor result
4374    case AUDIO_STREAM_MUSIC:
4375        return STRATEGY_MEDIA;
4376    case AUDIO_STREAM_ENFORCED_AUDIBLE:
4377        return STRATEGY_ENFORCED_AUDIBLE;
4378    case AUDIO_STREAM_TTS:
4379        return STRATEGY_TRANSMITTED_THROUGH_SPEAKER;
4380    case AUDIO_STREAM_ACCESSIBILITY:
4381        return STRATEGY_ACCESSIBILITY;
4382    case AUDIO_STREAM_REROUTING:
4383        return STRATEGY_REROUTING;
4384    }
4385}
4386
4387uint32_t AudioPolicyManager::getStrategyForAttr(const audio_attributes_t *attr) {
4388    // flags to strategy mapping
4389    if ((attr->flags & AUDIO_FLAG_BEACON) == AUDIO_FLAG_BEACON) {
4390        return (uint32_t) STRATEGY_TRANSMITTED_THROUGH_SPEAKER;
4391    }
4392    if ((attr->flags & AUDIO_FLAG_AUDIBILITY_ENFORCED) == AUDIO_FLAG_AUDIBILITY_ENFORCED) {
4393        return (uint32_t) STRATEGY_ENFORCED_AUDIBLE;
4394    }
4395
4396    // usage to strategy mapping
4397    switch (attr->usage) {
4398    case AUDIO_USAGE_ASSISTANCE_ACCESSIBILITY:
4399        if (isStreamActive(AUDIO_STREAM_RING) || isStreamActive(AUDIO_STREAM_ALARM)) {
4400            return (uint32_t) STRATEGY_SONIFICATION;
4401        }
4402        if (isInCall()) {
4403            return (uint32_t) STRATEGY_PHONE;
4404        }
4405        return (uint32_t) STRATEGY_ACCESSIBILITY;
4406
4407    case AUDIO_USAGE_MEDIA:
4408    case AUDIO_USAGE_GAME:
4409    case AUDIO_USAGE_ASSISTANCE_NAVIGATION_GUIDANCE:
4410    case AUDIO_USAGE_ASSISTANCE_SONIFICATION:
4411        return (uint32_t) STRATEGY_MEDIA;
4412
4413    case AUDIO_USAGE_VOICE_COMMUNICATION:
4414        return (uint32_t) STRATEGY_PHONE;
4415
4416    case AUDIO_USAGE_VOICE_COMMUNICATION_SIGNALLING:
4417        return (uint32_t) STRATEGY_DTMF;
4418
4419    case AUDIO_USAGE_ALARM:
4420    case AUDIO_USAGE_NOTIFICATION_TELEPHONY_RINGTONE:
4421        return (uint32_t) STRATEGY_SONIFICATION;
4422
4423    case AUDIO_USAGE_NOTIFICATION:
4424    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_REQUEST:
4425    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_INSTANT:
4426    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_DELAYED:
4427    case AUDIO_USAGE_NOTIFICATION_EVENT:
4428        return (uint32_t) STRATEGY_SONIFICATION_RESPECTFUL;
4429
4430    case AUDIO_USAGE_UNKNOWN:
4431    default:
4432        return (uint32_t) STRATEGY_MEDIA;
4433    }
4434}
4435
4436void AudioPolicyManager::handleNotificationRoutingForStream(audio_stream_type_t stream) {
4437    switch(stream) {
4438    case AUDIO_STREAM_MUSIC:
4439        checkOutputForStrategy(STRATEGY_SONIFICATION_RESPECTFUL);
4440        updateDevicesAndOutputs();
4441        break;
4442    default:
4443        break;
4444    }
4445}
4446
4447bool AudioPolicyManager::isAnyOutputActive(audio_stream_type_t streamToIgnore) {
4448    for (size_t s = 0 ; s < AUDIO_STREAM_CNT ; s++) {
4449        if (s == (size_t) streamToIgnore) {
4450            continue;
4451        }
4452        for (size_t i = 0; i < mOutputs.size(); i++) {
4453            const sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(i);
4454            if (outputDesc->mRefCount[s] != 0) {
4455                return true;
4456            }
4457        }
4458    }
4459    return false;
4460}
4461
4462uint32_t AudioPolicyManager::handleEventForBeacon(int event) {
4463    switch(event) {
4464    case STARTING_OUTPUT:
4465        mBeaconMuteRefCount++;
4466        break;
4467    case STOPPING_OUTPUT:
4468        if (mBeaconMuteRefCount > 0) {
4469            mBeaconMuteRefCount--;
4470        }
4471        break;
4472    case STARTING_BEACON:
4473        mBeaconPlayingRefCount++;
4474        break;
4475    case STOPPING_BEACON:
4476        if (mBeaconPlayingRefCount > 0) {
4477            mBeaconPlayingRefCount--;
4478        }
4479        break;
4480    }
4481
4482    if (mBeaconMuteRefCount > 0) {
4483        // any playback causes beacon to be muted
4484        return setBeaconMute(true);
4485    } else {
4486        // no other playback: unmute when beacon starts playing, mute when it stops
4487        return setBeaconMute(mBeaconPlayingRefCount == 0);
4488    }
4489}
4490
4491uint32_t AudioPolicyManager::setBeaconMute(bool mute) {
4492    ALOGV("setBeaconMute(%d) mBeaconMuteRefCount=%d mBeaconPlayingRefCount=%d",
4493            mute, mBeaconMuteRefCount, mBeaconPlayingRefCount);
4494    // keep track of muted state to avoid repeating mute/unmute operations
4495    if (mBeaconMuted != mute) {
4496        // mute/unmute AUDIO_STREAM_TTS on all outputs
4497        ALOGV("\t muting %d", mute);
4498        uint32_t maxLatency = 0;
4499        for (size_t i = 0; i < mOutputs.size(); i++) {
4500            sp<AudioOutputDescriptor> desc = mOutputs.valueAt(i);
4501            setStreamMute(AUDIO_STREAM_TTS, mute/*on*/,
4502                    desc->mIoHandle,
4503                    0 /*delay*/, AUDIO_DEVICE_NONE);
4504            const uint32_t latency = desc->latency() * 2;
4505            if (latency > maxLatency) {
4506                maxLatency = latency;
4507            }
4508        }
4509        mBeaconMuted = mute;
4510        return maxLatency;
4511    }
4512    return 0;
4513}
4514
4515audio_devices_t AudioPolicyManager::getDeviceForStrategy(routing_strategy strategy,
4516                                                             bool fromCache)
4517{
4518    uint32_t device = AUDIO_DEVICE_NONE;
4519
4520    if (fromCache) {
4521        ALOGVV("getDeviceForStrategy() from cache strategy %d, device %x",
4522              strategy, mDeviceForStrategy[strategy]);
4523        return mDeviceForStrategy[strategy];
4524    }
4525    audio_devices_t availableOutputDeviceTypes = mAvailableOutputDevices.types();
4526    switch (strategy) {
4527
4528    case STRATEGY_TRANSMITTED_THROUGH_SPEAKER:
4529        device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER;
4530        if (!device) {
4531            ALOGE("getDeviceForStrategy() no device found for "\
4532                    "STRATEGY_TRANSMITTED_THROUGH_SPEAKER");
4533        }
4534        break;
4535
4536    case STRATEGY_SONIFICATION_RESPECTFUL:
4537        if (isInCall()) {
4538            device = getDeviceForStrategy(STRATEGY_SONIFICATION, false /*fromCache*/);
4539        } else if (isStreamActiveRemotely(AUDIO_STREAM_MUSIC,
4540                SONIFICATION_RESPECTFUL_AFTER_MUSIC_DELAY)) {
4541            // while media is playing on a remote device, use the the sonification behavior.
4542            // Note that we test this usecase before testing if media is playing because
4543            //   the isStreamActive() method only informs about the activity of a stream, not
4544            //   if it's for local playback. Note also that we use the same delay between both tests
4545            device = getDeviceForStrategy(STRATEGY_SONIFICATION, false /*fromCache*/);
4546            //user "safe" speaker if available instead of normal speaker to avoid triggering
4547            //other acoustic safety mechanisms for notification
4548            if (device == AUDIO_DEVICE_OUT_SPEAKER && (availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER_SAFE))
4549                device = AUDIO_DEVICE_OUT_SPEAKER_SAFE;
4550        } else if (isStreamActive(AUDIO_STREAM_MUSIC, SONIFICATION_RESPECTFUL_AFTER_MUSIC_DELAY)) {
4551            // while media is playing (or has recently played), use the same device
4552            device = getDeviceForStrategy(STRATEGY_MEDIA, false /*fromCache*/);
4553        } else {
4554            // when media is not playing anymore, fall back on the sonification behavior
4555            device = getDeviceForStrategy(STRATEGY_SONIFICATION, false /*fromCache*/);
4556            //user "safe" speaker if available instead of normal speaker to avoid triggering
4557            //other acoustic safety mechanisms for notification
4558            if (device == AUDIO_DEVICE_OUT_SPEAKER && (availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER_SAFE))
4559                device = AUDIO_DEVICE_OUT_SPEAKER_SAFE;
4560        }
4561
4562        break;
4563
4564    case STRATEGY_DTMF:
4565        if (!isInCall()) {
4566            // when off call, DTMF strategy follows the same rules as MEDIA strategy
4567            device = getDeviceForStrategy(STRATEGY_MEDIA, false /*fromCache*/);
4568            break;
4569        }
4570        // when in call, DTMF and PHONE strategies follow the same rules
4571        // FALL THROUGH
4572
4573    case STRATEGY_PHONE:
4574        // Force use of only devices on primary output if:
4575        // - in call AND
4576        //   - cannot route from voice call RX OR
4577        //   - audio HAL version is < 3.0 and TX device is on the primary HW module
4578        if (mPhoneState == AUDIO_MODE_IN_CALL) {
4579            audio_devices_t txDevice =
4580                    getDeviceAndMixForInputSource(AUDIO_SOURCE_VOICE_COMMUNICATION);
4581            sp<AudioOutputDescriptor> hwOutputDesc = mOutputs.valueFor(mPrimaryOutput);
4582            if (((mAvailableInputDevices.types() &
4583                    AUDIO_DEVICE_IN_TELEPHONY_RX & ~AUDIO_DEVICE_BIT_IN) == 0) ||
4584                    (((txDevice & availablePrimaryInputDevices() & ~AUDIO_DEVICE_BIT_IN) != 0) &&
4585                         (hwOutputDesc->getAudioPort()->mModule->mHalVersion <
4586                             AUDIO_DEVICE_API_VERSION_3_0))) {
4587                availableOutputDeviceTypes = availablePrimaryOutputDevices();
4588            }
4589        }
4590        // for phone strategy, we first consider the forced use and then the available devices by order
4591        // of priority
4592        switch (mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION]) {
4593        case AUDIO_POLICY_FORCE_BT_SCO:
4594            if (!isInCall() || strategy != STRATEGY_DTMF) {
4595                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_SCO_CARKIT;
4596                if (device) break;
4597            }
4598            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_SCO_HEADSET;
4599            if (device) break;
4600            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_SCO;
4601            if (device) break;
4602            // if SCO device is requested but no SCO device is available, fall back to default case
4603            // FALL THROUGH
4604
4605        default:    // FORCE_NONE
4606            // when not in a phone call, phone strategy should route STREAM_VOICE_CALL to A2DP
4607            if (!isInCall() &&
4608                    (mForceUse[AUDIO_POLICY_FORCE_FOR_MEDIA] != AUDIO_POLICY_FORCE_NO_BT_A2DP) &&
4609                    (getA2dpOutput() != 0)) {
4610                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP;
4611                if (device) break;
4612                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES;
4613                if (device) break;
4614            }
4615            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_WIRED_HEADPHONE;
4616            if (device) break;
4617            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_WIRED_HEADSET;
4618            if (device) break;
4619            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_DEVICE;
4620            if (device) break;
4621            if (mPhoneState != AUDIO_MODE_IN_CALL) {
4622                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_ACCESSORY;
4623                if (device) break;
4624                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET;
4625                if (device) break;
4626                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_AUX_DIGITAL;
4627                if (device) break;
4628                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET;
4629                if (device) break;
4630            }
4631            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_EARPIECE;
4632            if (device) break;
4633            device = mDefaultOutputDevice->mDeviceType;
4634            if (device == AUDIO_DEVICE_NONE) {
4635                ALOGE("getDeviceForStrategy() no device found for STRATEGY_PHONE");
4636            }
4637            break;
4638
4639        case AUDIO_POLICY_FORCE_SPEAKER:
4640            // when not in a phone call, phone strategy should route STREAM_VOICE_CALL to
4641            // A2DP speaker when forcing to speaker output
4642            if (!isInCall() &&
4643                    (mForceUse[AUDIO_POLICY_FORCE_FOR_MEDIA] != AUDIO_POLICY_FORCE_NO_BT_A2DP) &&
4644                    (getA2dpOutput() != 0)) {
4645                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER;
4646                if (device) break;
4647            }
4648            if (!isInCall()) {
4649                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_ACCESSORY;
4650                if (device) break;
4651                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_DEVICE;
4652                if (device) break;
4653                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET;
4654                if (device) break;
4655                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_AUX_DIGITAL;
4656                if (device) break;
4657                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET;
4658                if (device) break;
4659            }
4660            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_LINE;
4661            if (device) break;
4662            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER;
4663            if (device) break;
4664            device = mDefaultOutputDevice->mDeviceType;
4665            if (device == AUDIO_DEVICE_NONE) {
4666                ALOGE("getDeviceForStrategy() no device found for STRATEGY_PHONE, FORCE_SPEAKER");
4667            }
4668            break;
4669        }
4670    break;
4671
4672    case STRATEGY_SONIFICATION:
4673
4674        // If incall, just select the STRATEGY_PHONE device: The rest of the behavior is handled by
4675        // handleIncallSonification().
4676        if (isInCall()) {
4677            device = getDeviceForStrategy(STRATEGY_PHONE, false /*fromCache*/);
4678            break;
4679        }
4680        // FALL THROUGH
4681
4682    case STRATEGY_ENFORCED_AUDIBLE:
4683        // strategy STRATEGY_ENFORCED_AUDIBLE uses same routing policy as STRATEGY_SONIFICATION
4684        // except:
4685        //   - when in call where it doesn't default to STRATEGY_PHONE behavior
4686        //   - in countries where not enforced in which case it follows STRATEGY_MEDIA
4687
4688        if ((strategy == STRATEGY_SONIFICATION) ||
4689                (mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] == AUDIO_POLICY_FORCE_SYSTEM_ENFORCED)) {
4690            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER;
4691            if (device == AUDIO_DEVICE_NONE) {
4692                ALOGE("getDeviceForStrategy() speaker device not found for STRATEGY_SONIFICATION");
4693            }
4694        }
4695        // The second device used for sonification is the same as the device used by media strategy
4696        // FALL THROUGH
4697
4698    // FIXME: STRATEGY_ACCESSIBILITY and STRATEGY_REROUTING follow STRATEGY_MEDIA for now
4699    case STRATEGY_ACCESSIBILITY:
4700        if (strategy == STRATEGY_ACCESSIBILITY) {
4701            // do not route accessibility prompts to a digital output currently configured with a
4702            // compressed format as they would likely not be mixed and dropped.
4703            for (size_t i = 0; i < mOutputs.size(); i++) {
4704                sp<AudioOutputDescriptor> desc = mOutputs.valueAt(i);
4705                audio_devices_t devices = desc->device() &
4706                    (AUDIO_DEVICE_OUT_HDMI | AUDIO_DEVICE_OUT_SPDIF | AUDIO_DEVICE_OUT_HDMI_ARC);
4707                if (desc->isActive() && !audio_is_linear_pcm(desc->mFormat) &&
4708                        devices != AUDIO_DEVICE_NONE) {
4709                    availableOutputDeviceTypes = availableOutputDeviceTypes & ~devices;
4710                }
4711            }
4712        }
4713        // FALL THROUGH
4714
4715    case STRATEGY_REROUTING:
4716    case STRATEGY_MEDIA: {
4717        uint32_t device2 = AUDIO_DEVICE_NONE;
4718        if (strategy != STRATEGY_SONIFICATION) {
4719            // no sonification on remote submix (e.g. WFD)
4720            if (mAvailableOutputDevices.getDevice(AUDIO_DEVICE_OUT_REMOTE_SUBMIX, String8("0")) != 0) {
4721                device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_REMOTE_SUBMIX;
4722            }
4723        }
4724        if ((device2 == AUDIO_DEVICE_NONE) &&
4725                (mForceUse[AUDIO_POLICY_FORCE_FOR_MEDIA] != AUDIO_POLICY_FORCE_NO_BT_A2DP) &&
4726                (getA2dpOutput() != 0)) {
4727            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP;
4728            if (device2 == AUDIO_DEVICE_NONE) {
4729                device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES;
4730            }
4731            if (device2 == AUDIO_DEVICE_NONE) {
4732                device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER;
4733            }
4734        }
4735        if ((device2 == AUDIO_DEVICE_NONE) &&
4736            (mForceUse[AUDIO_POLICY_FORCE_FOR_MEDIA] == AUDIO_POLICY_FORCE_SPEAKER)) {
4737            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER;
4738        }
4739        if (device2 == AUDIO_DEVICE_NONE) {
4740            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_WIRED_HEADPHONE;
4741        }
4742        if ((device2 == AUDIO_DEVICE_NONE)) {
4743            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_LINE;
4744        }
4745        if (device2 == AUDIO_DEVICE_NONE) {
4746            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_WIRED_HEADSET;
4747        }
4748        if (device2 == AUDIO_DEVICE_NONE) {
4749            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_ACCESSORY;
4750        }
4751        if (device2 == AUDIO_DEVICE_NONE) {
4752            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_DEVICE;
4753        }
4754        if (device2 == AUDIO_DEVICE_NONE) {
4755            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET;
4756        }
4757        if ((device2 == AUDIO_DEVICE_NONE) && (strategy != STRATEGY_SONIFICATION)) {
4758            // no sonification on aux digital (e.g. HDMI)
4759            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_AUX_DIGITAL;
4760        }
4761        if ((device2 == AUDIO_DEVICE_NONE) &&
4762                (mForceUse[AUDIO_POLICY_FORCE_FOR_DOCK] == AUDIO_POLICY_FORCE_ANALOG_DOCK)) {
4763            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET;
4764        }
4765        if (device2 == AUDIO_DEVICE_NONE) {
4766            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER;
4767        }
4768        int device3 = AUDIO_DEVICE_NONE;
4769        if (strategy == STRATEGY_MEDIA) {
4770            // ARC, SPDIF and AUX_LINE can co-exist with others.
4771            device3 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_HDMI_ARC;
4772            device3 |= (availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPDIF);
4773            device3 |= (availableOutputDeviceTypes & AUDIO_DEVICE_OUT_AUX_LINE);
4774        }
4775
4776        device2 |= device3;
4777        // device is DEVICE_OUT_SPEAKER if we come from case STRATEGY_SONIFICATION or
4778        // STRATEGY_ENFORCED_AUDIBLE, AUDIO_DEVICE_NONE otherwise
4779        device |= device2;
4780
4781        // If hdmi system audio mode is on, remove speaker out of output list.
4782        if ((strategy == STRATEGY_MEDIA) &&
4783            (mForceUse[AUDIO_POLICY_FORCE_FOR_HDMI_SYSTEM_AUDIO] ==
4784                AUDIO_POLICY_FORCE_HDMI_SYSTEM_AUDIO_ENFORCED)) {
4785            device &= ~AUDIO_DEVICE_OUT_SPEAKER;
4786        }
4787
4788        if (device) break;
4789        device = mDefaultOutputDevice->mDeviceType;
4790        if (device == AUDIO_DEVICE_NONE) {
4791            ALOGE("getDeviceForStrategy() no device found for STRATEGY_MEDIA");
4792        }
4793        } break;
4794
4795    default:
4796        ALOGW("getDeviceForStrategy() unknown strategy: %d", strategy);
4797        break;
4798    }
4799
4800    ALOGVV("getDeviceForStrategy() strategy %d, device %x", strategy, device);
4801    return device;
4802}
4803
4804void AudioPolicyManager::updateDevicesAndOutputs()
4805{
4806    for (int i = 0; i < NUM_STRATEGIES; i++) {
4807        mDeviceForStrategy[i] = getDeviceForStrategy((routing_strategy)i, false /*fromCache*/);
4808    }
4809    mPreviousOutputs = mOutputs;
4810}
4811
4812uint32_t AudioPolicyManager::checkDeviceMuteStrategies(sp<AudioOutputDescriptor> outputDesc,
4813                                                       audio_devices_t prevDevice,
4814                                                       uint32_t delayMs)
4815{
4816    // mute/unmute strategies using an incompatible device combination
4817    // if muting, wait for the audio in pcm buffer to be drained before proceeding
4818    // if unmuting, unmute only after the specified delay
4819    if (outputDesc->isDuplicated()) {
4820        return 0;
4821    }
4822
4823    uint32_t muteWaitMs = 0;
4824    audio_devices_t device = outputDesc->device();
4825    bool shouldMute = outputDesc->isActive() && (popcount(device) >= 2);
4826
4827    for (size_t i = 0; i < NUM_STRATEGIES; i++) {
4828        audio_devices_t curDevice = getDeviceForStrategy((routing_strategy)i, false /*fromCache*/);
4829        curDevice = curDevice & outputDesc->mProfile->mSupportedDevices.types();
4830        bool mute = shouldMute && (curDevice & device) && (curDevice != device);
4831        bool doMute = false;
4832
4833        if (mute && !outputDesc->mStrategyMutedByDevice[i]) {
4834            doMute = true;
4835            outputDesc->mStrategyMutedByDevice[i] = true;
4836        } else if (!mute && outputDesc->mStrategyMutedByDevice[i]){
4837            doMute = true;
4838            outputDesc->mStrategyMutedByDevice[i] = false;
4839        }
4840        if (doMute) {
4841            for (size_t j = 0; j < mOutputs.size(); j++) {
4842                sp<AudioOutputDescriptor> desc = mOutputs.valueAt(j);
4843                // skip output if it does not share any device with current output
4844                if ((desc->supportedDevices() & outputDesc->supportedDevices())
4845                        == AUDIO_DEVICE_NONE) {
4846                    continue;
4847                }
4848                audio_io_handle_t curOutput = mOutputs.keyAt(j);
4849                ALOGVV("checkDeviceMuteStrategies() %s strategy %d (curDevice %04x) on output %d",
4850                      mute ? "muting" : "unmuting", i, curDevice, curOutput);
4851                setStrategyMute((routing_strategy)i, mute, curOutput, mute ? 0 : delayMs);
4852                if (desc->isStrategyActive((routing_strategy)i)) {
4853                    if (mute) {
4854                        // FIXME: should not need to double latency if volume could be applied
4855                        // immediately by the audioflinger mixer. We must account for the delay
4856                        // between now and the next time the audioflinger thread for this output
4857                        // will process a buffer (which corresponds to one buffer size,
4858                        // usually 1/2 or 1/4 of the latency).
4859                        if (muteWaitMs < desc->latency() * 2) {
4860                            muteWaitMs = desc->latency() * 2;
4861                        }
4862                    }
4863                }
4864            }
4865        }
4866    }
4867
4868    // temporary mute output if device selection changes to avoid volume bursts due to
4869    // different per device volumes
4870    if (outputDesc->isActive() && (device != prevDevice)) {
4871        if (muteWaitMs < outputDesc->latency() * 2) {
4872            muteWaitMs = outputDesc->latency() * 2;
4873        }
4874        for (size_t i = 0; i < NUM_STRATEGIES; i++) {
4875            if (outputDesc->isStrategyActive((routing_strategy)i)) {
4876                setStrategyMute((routing_strategy)i, true, outputDesc->mIoHandle);
4877                // do tempMute unmute after twice the mute wait time
4878                setStrategyMute((routing_strategy)i, false, outputDesc->mIoHandle,
4879                                muteWaitMs *2, device);
4880            }
4881        }
4882    }
4883
4884    // wait for the PCM output buffers to empty before proceeding with the rest of the command
4885    if (muteWaitMs > delayMs) {
4886        muteWaitMs -= delayMs;
4887        usleep(muteWaitMs * 1000);
4888        return muteWaitMs;
4889    }
4890    return 0;
4891}
4892
4893uint32_t AudioPolicyManager::setOutputDevice(audio_io_handle_t output,
4894                                             audio_devices_t device,
4895                                             bool force,
4896                                             int delayMs,
4897                                             audio_patch_handle_t *patchHandle,
4898                                             const char* address)
4899{
4900    ALOGV("setOutputDevice() output %d device %04x delayMs %d", output, device, delayMs);
4901    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
4902    AudioParameter param;
4903    uint32_t muteWaitMs;
4904
4905    if (outputDesc->isDuplicated()) {
4906        muteWaitMs = setOutputDevice(outputDesc->mOutput1->mIoHandle, device, force, delayMs);
4907        muteWaitMs += setOutputDevice(outputDesc->mOutput2->mIoHandle, device, force, delayMs);
4908        return muteWaitMs;
4909    }
4910    // no need to proceed if new device is not AUDIO_DEVICE_NONE and not supported by current
4911    // output profile
4912    if ((device != AUDIO_DEVICE_NONE) &&
4913            ((device & outputDesc->mProfile->mSupportedDevices.types()) == 0)) {
4914        return 0;
4915    }
4916
4917    // filter devices according to output selected
4918    device = (audio_devices_t)(device & outputDesc->mProfile->mSupportedDevices.types());
4919
4920    audio_devices_t prevDevice = outputDesc->mDevice;
4921
4922    ALOGV("setOutputDevice() prevDevice %04x", prevDevice);
4923
4924    if (device != AUDIO_DEVICE_NONE) {
4925        outputDesc->mDevice = device;
4926    }
4927    muteWaitMs = checkDeviceMuteStrategies(outputDesc, prevDevice, delayMs);
4928
4929    // Do not change the routing if:
4930    //      the requested device is AUDIO_DEVICE_NONE
4931    //      OR the requested device is the same as current device
4932    //  AND force is not specified
4933    //  AND the output is connected by a valid audio patch.
4934    // Doing this check here allows the caller to call setOutputDevice() without conditions
4935    if ((device == AUDIO_DEVICE_NONE || device == prevDevice) && !force &&
4936            outputDesc->mPatchHandle != 0) {
4937        ALOGV("setOutputDevice() setting same device %04x or null device for output %d",
4938              device, output);
4939        return muteWaitMs;
4940    }
4941
4942    ALOGV("setOutputDevice() changing device");
4943
4944    // do the routing
4945    if (device == AUDIO_DEVICE_NONE) {
4946        resetOutputDevice(output, delayMs, NULL);
4947    } else {
4948        DeviceVector deviceList = (address == NULL) ?
4949                mAvailableOutputDevices.getDevicesFromType(device)
4950                : mAvailableOutputDevices.getDevicesFromTypeAddr(device, String8(address));
4951        if (!deviceList.isEmpty()) {
4952            struct audio_patch patch;
4953            outputDesc->toAudioPortConfig(&patch.sources[0]);
4954            patch.num_sources = 1;
4955            patch.num_sinks = 0;
4956            for (size_t i = 0; i < deviceList.size() && i < AUDIO_PATCH_PORTS_MAX; i++) {
4957                deviceList.itemAt(i)->toAudioPortConfig(&patch.sinks[i]);
4958                patch.num_sinks++;
4959            }
4960            ssize_t index;
4961            if (patchHandle && *patchHandle != AUDIO_PATCH_HANDLE_NONE) {
4962                index = mAudioPatches.indexOfKey(*patchHandle);
4963            } else {
4964                index = mAudioPatches.indexOfKey(outputDesc->mPatchHandle);
4965            }
4966            sp< AudioPatch> patchDesc;
4967            audio_patch_handle_t afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
4968            if (index >= 0) {
4969                patchDesc = mAudioPatches.valueAt(index);
4970                afPatchHandle = patchDesc->mAfPatchHandle;
4971            }
4972
4973            status_t status = mpClientInterface->createAudioPatch(&patch,
4974                                                                   &afPatchHandle,
4975                                                                   delayMs);
4976            ALOGV("setOutputDevice() createAudioPatch returned %d patchHandle %d"
4977                    "num_sources %d num_sinks %d",
4978                                       status, afPatchHandle, patch.num_sources, patch.num_sinks);
4979            if (status == NO_ERROR) {
4980                if (index < 0) {
4981                    patchDesc = new AudioPatch((audio_patch_handle_t)nextUniqueId(),
4982                                               &patch, mUidCached);
4983                    addAudioPatch(patchDesc->mHandle, patchDesc);
4984                } else {
4985                    patchDesc->mPatch = patch;
4986                }
4987                patchDesc->mAfPatchHandle = afPatchHandle;
4988                patchDesc->mUid = mUidCached;
4989                if (patchHandle) {
4990                    *patchHandle = patchDesc->mHandle;
4991                }
4992                outputDesc->mPatchHandle = patchDesc->mHandle;
4993                nextAudioPortGeneration();
4994                mpClientInterface->onAudioPatchListUpdate();
4995            }
4996        }
4997
4998        // inform all input as well
4999        for (size_t i = 0; i < mInputs.size(); i++) {
5000            const sp<AudioInputDescriptor>  inputDescriptor = mInputs.valueAt(i);
5001            if (!isVirtualInputDevice(inputDescriptor->mDevice)) {
5002                AudioParameter inputCmd = AudioParameter();
5003                ALOGV("%s: inform input %d of device:%d", __func__,
5004                      inputDescriptor->mIoHandle, device);
5005                inputCmd.addInt(String8(AudioParameter::keyRouting),device);
5006                mpClientInterface->setParameters(inputDescriptor->mIoHandle,
5007                                                 inputCmd.toString(),
5008                                                 delayMs);
5009            }
5010        }
5011    }
5012
5013    // update stream volumes according to new device
5014    applyStreamVolumes(output, device, delayMs);
5015
5016    return muteWaitMs;
5017}
5018
5019status_t AudioPolicyManager::resetOutputDevice(audio_io_handle_t output,
5020                                               int delayMs,
5021                                               audio_patch_handle_t *patchHandle)
5022{
5023    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
5024    ssize_t index;
5025    if (patchHandle) {
5026        index = mAudioPatches.indexOfKey(*patchHandle);
5027    } else {
5028        index = mAudioPatches.indexOfKey(outputDesc->mPatchHandle);
5029    }
5030    if (index < 0) {
5031        return INVALID_OPERATION;
5032    }
5033    sp< AudioPatch> patchDesc = mAudioPatches.valueAt(index);
5034    status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, delayMs);
5035    ALOGV("resetOutputDevice() releaseAudioPatch returned %d", status);
5036    outputDesc->mPatchHandle = 0;
5037    removeAudioPatch(patchDesc->mHandle);
5038    nextAudioPortGeneration();
5039    mpClientInterface->onAudioPatchListUpdate();
5040    return status;
5041}
5042
5043status_t AudioPolicyManager::setInputDevice(audio_io_handle_t input,
5044                                            audio_devices_t device,
5045                                            bool force,
5046                                            audio_patch_handle_t *patchHandle)
5047{
5048    status_t status = NO_ERROR;
5049
5050    sp<AudioInputDescriptor> inputDesc = mInputs.valueFor(input);
5051    if ((device != AUDIO_DEVICE_NONE) && ((device != inputDesc->mDevice) || force)) {
5052        inputDesc->mDevice = device;
5053
5054        DeviceVector deviceList = mAvailableInputDevices.getDevicesFromType(device);
5055        if (!deviceList.isEmpty()) {
5056            struct audio_patch patch;
5057            inputDesc->toAudioPortConfig(&patch.sinks[0]);
5058            // AUDIO_SOURCE_HOTWORD is for internal use only:
5059            // handled as AUDIO_SOURCE_VOICE_RECOGNITION by the audio HAL
5060            if (patch.sinks[0].ext.mix.usecase.source == AUDIO_SOURCE_HOTWORD &&
5061                    !inputDesc->mIsSoundTrigger) {
5062                patch.sinks[0].ext.mix.usecase.source = AUDIO_SOURCE_VOICE_RECOGNITION;
5063            }
5064            patch.num_sinks = 1;
5065            //only one input device for now
5066            deviceList.itemAt(0)->toAudioPortConfig(&patch.sources[0]);
5067            patch.num_sources = 1;
5068            ssize_t index;
5069            if (patchHandle && *patchHandle != AUDIO_PATCH_HANDLE_NONE) {
5070                index = mAudioPatches.indexOfKey(*patchHandle);
5071            } else {
5072                index = mAudioPatches.indexOfKey(inputDesc->mPatchHandle);
5073            }
5074            sp< AudioPatch> patchDesc;
5075            audio_patch_handle_t afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
5076            if (index >= 0) {
5077                patchDesc = mAudioPatches.valueAt(index);
5078                afPatchHandle = patchDesc->mAfPatchHandle;
5079            }
5080
5081            status_t status = mpClientInterface->createAudioPatch(&patch,
5082                                                                  &afPatchHandle,
5083                                                                  0);
5084            ALOGV("setInputDevice() createAudioPatch returned %d patchHandle %d",
5085                                                                          status, afPatchHandle);
5086            if (status == NO_ERROR) {
5087                if (index < 0) {
5088                    patchDesc = new AudioPatch((audio_patch_handle_t)nextUniqueId(),
5089                                               &patch, mUidCached);
5090                    addAudioPatch(patchDesc->mHandle, patchDesc);
5091                } else {
5092                    patchDesc->mPatch = patch;
5093                }
5094                patchDesc->mAfPatchHandle = afPatchHandle;
5095                patchDesc->mUid = mUidCached;
5096                if (patchHandle) {
5097                    *patchHandle = patchDesc->mHandle;
5098                }
5099                inputDesc->mPatchHandle = patchDesc->mHandle;
5100                nextAudioPortGeneration();
5101                mpClientInterface->onAudioPatchListUpdate();
5102            }
5103        }
5104    }
5105    return status;
5106}
5107
5108status_t AudioPolicyManager::resetInputDevice(audio_io_handle_t input,
5109                                              audio_patch_handle_t *patchHandle)
5110{
5111    sp<AudioInputDescriptor> inputDesc = mInputs.valueFor(input);
5112    ssize_t index;
5113    if (patchHandle) {
5114        index = mAudioPatches.indexOfKey(*patchHandle);
5115    } else {
5116        index = mAudioPatches.indexOfKey(inputDesc->mPatchHandle);
5117    }
5118    if (index < 0) {
5119        return INVALID_OPERATION;
5120    }
5121    sp< AudioPatch> patchDesc = mAudioPatches.valueAt(index);
5122    status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, 0);
5123    ALOGV("resetInputDevice() releaseAudioPatch returned %d", status);
5124    inputDesc->mPatchHandle = 0;
5125    removeAudioPatch(patchDesc->mHandle);
5126    nextAudioPortGeneration();
5127    mpClientInterface->onAudioPatchListUpdate();
5128    return status;
5129}
5130
5131sp<AudioPolicyManager::IOProfile> AudioPolicyManager::getInputProfile(audio_devices_t device,
5132                                                   String8 address,
5133                                                   uint32_t& samplingRate,
5134                                                   audio_format_t format,
5135                                                   audio_channel_mask_t channelMask,
5136                                                   audio_input_flags_t flags)
5137{
5138    // Choose an input profile based on the requested capture parameters: select the first available
5139    // profile supporting all requested parameters.
5140
5141    for (size_t i = 0; i < mHwModules.size(); i++)
5142    {
5143        if (mHwModules[i]->mHandle == 0) {
5144            continue;
5145        }
5146        for (size_t j = 0; j < mHwModules[i]->mInputProfiles.size(); j++)
5147        {
5148            sp<IOProfile> profile = mHwModules[i]->mInputProfiles[j];
5149            // profile->log();
5150            if (profile->isCompatibleProfile(device, address, samplingRate,
5151                                             &samplingRate /*updatedSamplingRate*/,
5152                                             format, channelMask, (audio_output_flags_t) flags)) {
5153
5154                return profile;
5155            }
5156        }
5157    }
5158    return NULL;
5159}
5160
5161
5162audio_devices_t AudioPolicyManager::getDeviceAndMixForInputSource(audio_source_t inputSource,
5163                                                            AudioMix **policyMix)
5164{
5165    audio_devices_t availableDeviceTypes = mAvailableInputDevices.types() &
5166                                            ~AUDIO_DEVICE_BIT_IN;
5167
5168    for (size_t i = 0; i < mPolicyMixes.size(); i++) {
5169        if (mPolicyMixes[i]->mMix.mMixType != MIX_TYPE_RECORDERS) {
5170            continue;
5171        }
5172        for (size_t j = 0; j < mPolicyMixes[i]->mMix.mCriteria.size(); j++) {
5173            if ((RULE_MATCH_ATTRIBUTE_CAPTURE_PRESET == mPolicyMixes[i]->mMix.mCriteria[j].mRule &&
5174                    mPolicyMixes[i]->mMix.mCriteria[j].mAttr.mSource == inputSource) ||
5175               (RULE_EXCLUDE_ATTRIBUTE_CAPTURE_PRESET == mPolicyMixes[i]->mMix.mCriteria[j].mRule &&
5176                    mPolicyMixes[i]->mMix.mCriteria[j].mAttr.mSource != inputSource)) {
5177                if (availableDeviceTypes & AUDIO_DEVICE_IN_REMOTE_SUBMIX) {
5178                    if (policyMix != NULL) {
5179                        *policyMix = &mPolicyMixes[i]->mMix;
5180                    }
5181                    return AUDIO_DEVICE_IN_REMOTE_SUBMIX;
5182                }
5183                break;
5184            }
5185        }
5186    }
5187
5188    return getDeviceForInputSource(inputSource);
5189}
5190
5191audio_devices_t AudioPolicyManager::getDeviceForInputSource(audio_source_t inputSource)
5192{
5193    uint32_t device = AUDIO_DEVICE_NONE;
5194    audio_devices_t availableDeviceTypes = mAvailableInputDevices.types() &
5195                                            ~AUDIO_DEVICE_BIT_IN;
5196
5197    switch (inputSource) {
5198    case AUDIO_SOURCE_VOICE_UPLINK:
5199      if (availableDeviceTypes & AUDIO_DEVICE_IN_VOICE_CALL) {
5200          device = AUDIO_DEVICE_IN_VOICE_CALL;
5201          break;
5202      }
5203      break;
5204
5205    case AUDIO_SOURCE_DEFAULT:
5206    case AUDIO_SOURCE_MIC:
5207    if (availableDeviceTypes & AUDIO_DEVICE_IN_BLUETOOTH_A2DP) {
5208        device = AUDIO_DEVICE_IN_BLUETOOTH_A2DP;
5209    } else if ((mForceUse[AUDIO_POLICY_FORCE_FOR_RECORD] == AUDIO_POLICY_FORCE_BT_SCO) &&
5210        (availableDeviceTypes & AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET)) {
5211        device = AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET;
5212    } else if (availableDeviceTypes & AUDIO_DEVICE_IN_WIRED_HEADSET) {
5213        device = AUDIO_DEVICE_IN_WIRED_HEADSET;
5214    } else if (availableDeviceTypes & AUDIO_DEVICE_IN_USB_DEVICE) {
5215        device = AUDIO_DEVICE_IN_USB_DEVICE;
5216    } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) {
5217        device = AUDIO_DEVICE_IN_BUILTIN_MIC;
5218    }
5219    break;
5220
5221    case AUDIO_SOURCE_VOICE_COMMUNICATION:
5222        // Allow only use of devices on primary input if in call and HAL does not support routing
5223        // to voice call path.
5224        if ((mPhoneState == AUDIO_MODE_IN_CALL) &&
5225                (mAvailableOutputDevices.types() & AUDIO_DEVICE_OUT_TELEPHONY_TX) == 0) {
5226            availableDeviceTypes = availablePrimaryInputDevices() & ~AUDIO_DEVICE_BIT_IN;
5227        }
5228
5229        switch (mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION]) {
5230        case AUDIO_POLICY_FORCE_BT_SCO:
5231            // if SCO device is requested but no SCO device is available, fall back to default case
5232            if (availableDeviceTypes & AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET) {
5233                device = AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET;
5234                break;
5235            }
5236            // FALL THROUGH
5237
5238        default:    // FORCE_NONE
5239            if (availableDeviceTypes & AUDIO_DEVICE_IN_WIRED_HEADSET) {
5240                device = AUDIO_DEVICE_IN_WIRED_HEADSET;
5241            } else if (availableDeviceTypes & AUDIO_DEVICE_IN_USB_DEVICE) {
5242                device = AUDIO_DEVICE_IN_USB_DEVICE;
5243            } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) {
5244                device = AUDIO_DEVICE_IN_BUILTIN_MIC;
5245            }
5246            break;
5247
5248        case AUDIO_POLICY_FORCE_SPEAKER:
5249            if (availableDeviceTypes & AUDIO_DEVICE_IN_BACK_MIC) {
5250                device = AUDIO_DEVICE_IN_BACK_MIC;
5251            } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) {
5252                device = AUDIO_DEVICE_IN_BUILTIN_MIC;
5253            }
5254            break;
5255        }
5256        break;
5257
5258    case AUDIO_SOURCE_VOICE_RECOGNITION:
5259    case AUDIO_SOURCE_HOTWORD:
5260        if (mForceUse[AUDIO_POLICY_FORCE_FOR_RECORD] == AUDIO_POLICY_FORCE_BT_SCO &&
5261                availableDeviceTypes & AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET) {
5262            device = AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET;
5263        } else if (availableDeviceTypes & AUDIO_DEVICE_IN_WIRED_HEADSET) {
5264            device = AUDIO_DEVICE_IN_WIRED_HEADSET;
5265        } else if (availableDeviceTypes & AUDIO_DEVICE_IN_USB_DEVICE) {
5266            device = AUDIO_DEVICE_IN_USB_DEVICE;
5267        } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) {
5268            device = AUDIO_DEVICE_IN_BUILTIN_MIC;
5269        }
5270        break;
5271    case AUDIO_SOURCE_CAMCORDER:
5272        if (availableDeviceTypes & AUDIO_DEVICE_IN_BACK_MIC) {
5273            device = AUDIO_DEVICE_IN_BACK_MIC;
5274        } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) {
5275            device = AUDIO_DEVICE_IN_BUILTIN_MIC;
5276        }
5277        break;
5278    case AUDIO_SOURCE_VOICE_DOWNLINK:
5279    case AUDIO_SOURCE_VOICE_CALL:
5280        if (availableDeviceTypes & AUDIO_DEVICE_IN_VOICE_CALL) {
5281            device = AUDIO_DEVICE_IN_VOICE_CALL;
5282        }
5283        break;
5284    case AUDIO_SOURCE_REMOTE_SUBMIX:
5285        if (availableDeviceTypes & AUDIO_DEVICE_IN_REMOTE_SUBMIX) {
5286            device = AUDIO_DEVICE_IN_REMOTE_SUBMIX;
5287        }
5288        break;
5289     case AUDIO_SOURCE_FM_TUNER:
5290        if (availableDeviceTypes & AUDIO_DEVICE_IN_FM_TUNER) {
5291            device = AUDIO_DEVICE_IN_FM_TUNER;
5292        }
5293        break;
5294    default:
5295        ALOGW("getDeviceForInputSource() invalid input source %d", inputSource);
5296        break;
5297    }
5298    ALOGV("getDeviceForInputSource()input source %d, device %08x", inputSource, device);
5299    return device;
5300}
5301
5302bool AudioPolicyManager::isVirtualInputDevice(audio_devices_t device)
5303{
5304    if ((device & AUDIO_DEVICE_BIT_IN) != 0) {
5305        device &= ~AUDIO_DEVICE_BIT_IN;
5306        if ((popcount(device) == 1) && ((device & ~APM_AUDIO_IN_DEVICE_VIRTUAL_ALL) == 0))
5307            return true;
5308    }
5309    return false;
5310}
5311
5312bool AudioPolicyManager::deviceDistinguishesOnAddress(audio_devices_t device) {
5313    return ((device & APM_AUDIO_DEVICE_MATCH_ADDRESS_ALL & ~AUDIO_DEVICE_BIT_IN) != 0);
5314}
5315
5316audio_io_handle_t AudioPolicyManager::getActiveInput(bool ignoreVirtualInputs)
5317{
5318    for (size_t i = 0; i < mInputs.size(); i++) {
5319        const sp<AudioInputDescriptor>  input_descriptor = mInputs.valueAt(i);
5320        if ((input_descriptor->mRefCount > 0)
5321                && (!ignoreVirtualInputs || !isVirtualInputDevice(input_descriptor->mDevice))) {
5322            return mInputs.keyAt(i);
5323        }
5324    }
5325    return 0;
5326}
5327
5328uint32_t AudioPolicyManager::activeInputsCount() const
5329{
5330    uint32_t count = 0;
5331    for (size_t i = 0; i < mInputs.size(); i++) {
5332        const sp<AudioInputDescriptor>  desc = mInputs.valueAt(i);
5333        if (desc->mRefCount > 0) {
5334            count++;
5335        }
5336    }
5337    return count;
5338}
5339
5340
5341audio_devices_t AudioPolicyManager::getDeviceForVolume(audio_devices_t device)
5342{
5343    if (device == AUDIO_DEVICE_NONE) {
5344        // this happens when forcing a route update and no track is active on an output.
5345        // In this case the returned category is not important.
5346        device =  AUDIO_DEVICE_OUT_SPEAKER;
5347    } else if (popcount(device) > 1) {
5348        // Multiple device selection is either:
5349        //  - speaker + one other device: give priority to speaker in this case.
5350        //  - one A2DP device + another device: happens with duplicated output. In this case
5351        // retain the device on the A2DP output as the other must not correspond to an active
5352        // selection if not the speaker.
5353        //  - HDMI-CEC system audio mode only output: give priority to available item in order.
5354        if (device & AUDIO_DEVICE_OUT_SPEAKER) {
5355            device = AUDIO_DEVICE_OUT_SPEAKER;
5356        } else if (device & AUDIO_DEVICE_OUT_HDMI_ARC) {
5357            device = AUDIO_DEVICE_OUT_HDMI_ARC;
5358        } else if (device & AUDIO_DEVICE_OUT_AUX_LINE) {
5359            device = AUDIO_DEVICE_OUT_AUX_LINE;
5360        } else if (device & AUDIO_DEVICE_OUT_SPDIF) {
5361            device = AUDIO_DEVICE_OUT_SPDIF;
5362        } else {
5363            device = (audio_devices_t)(device & AUDIO_DEVICE_OUT_ALL_A2DP);
5364        }
5365    }
5366
5367    /*SPEAKER_SAFE is an alias of SPEAKER for purposes of volume control*/
5368    if (device == AUDIO_DEVICE_OUT_SPEAKER_SAFE)
5369        device = AUDIO_DEVICE_OUT_SPEAKER;
5370
5371    ALOGW_IF(popcount(device) != 1,
5372            "getDeviceForVolume() invalid device combination: %08x",
5373            device);
5374
5375    return device;
5376}
5377
5378AudioPolicyManager::device_category AudioPolicyManager::getDeviceCategory(audio_devices_t device)
5379{
5380    switch(getDeviceForVolume(device)) {
5381        case AUDIO_DEVICE_OUT_EARPIECE:
5382            return DEVICE_CATEGORY_EARPIECE;
5383        case AUDIO_DEVICE_OUT_WIRED_HEADSET:
5384        case AUDIO_DEVICE_OUT_WIRED_HEADPHONE:
5385        case AUDIO_DEVICE_OUT_BLUETOOTH_SCO:
5386        case AUDIO_DEVICE_OUT_BLUETOOTH_SCO_HEADSET:
5387        case AUDIO_DEVICE_OUT_BLUETOOTH_A2DP:
5388        case AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES:
5389            return DEVICE_CATEGORY_HEADSET;
5390        case AUDIO_DEVICE_OUT_LINE:
5391        case AUDIO_DEVICE_OUT_AUX_DIGITAL:
5392        /*USB?  Remote submix?*/
5393            return DEVICE_CATEGORY_EXT_MEDIA;
5394        case AUDIO_DEVICE_OUT_SPEAKER:
5395        case AUDIO_DEVICE_OUT_BLUETOOTH_SCO_CARKIT:
5396        case AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER:
5397        case AUDIO_DEVICE_OUT_USB_ACCESSORY:
5398        case AUDIO_DEVICE_OUT_USB_DEVICE:
5399        case AUDIO_DEVICE_OUT_REMOTE_SUBMIX:
5400        default:
5401            return DEVICE_CATEGORY_SPEAKER;
5402    }
5403}
5404
5405/* static */
5406float AudioPolicyManager::volIndexToAmpl(audio_devices_t device, const StreamDescriptor& streamDesc,
5407        int indexInUi)
5408{
5409    device_category deviceCategory = getDeviceCategory(device);
5410    const VolumeCurvePoint *curve = streamDesc.mVolumeCurve[deviceCategory];
5411
5412    // the volume index in the UI is relative to the min and max volume indices for this stream type
5413    int nbSteps = 1 + curve[VOLMAX].mIndex -
5414            curve[VOLMIN].mIndex;
5415    int volIdx = (nbSteps * (indexInUi - streamDesc.mIndexMin)) /
5416            (streamDesc.mIndexMax - streamDesc.mIndexMin);
5417
5418    // find what part of the curve this index volume belongs to, or if it's out of bounds
5419    int segment = 0;
5420    if (volIdx < curve[VOLMIN].mIndex) {         // out of bounds
5421        return 0.0f;
5422    } else if (volIdx < curve[VOLKNEE1].mIndex) {
5423        segment = 0;
5424    } else if (volIdx < curve[VOLKNEE2].mIndex) {
5425        segment = 1;
5426    } else if (volIdx <= curve[VOLMAX].mIndex) {
5427        segment = 2;
5428    } else {                                                               // out of bounds
5429        return 1.0f;
5430    }
5431
5432    // linear interpolation in the attenuation table in dB
5433    float decibels = curve[segment].mDBAttenuation +
5434            ((float)(volIdx - curve[segment].mIndex)) *
5435                ( (curve[segment+1].mDBAttenuation -
5436                        curve[segment].mDBAttenuation) /
5437                    ((float)(curve[segment+1].mIndex -
5438                            curve[segment].mIndex)) );
5439
5440    float amplification = exp( decibels * 0.115129f); // exp( dB * ln(10) / 20 )
5441
5442    ALOGVV("VOLUME vol index=[%d %d %d], dB=[%.1f %.1f %.1f] ampl=%.5f",
5443            curve[segment].mIndex, volIdx,
5444            curve[segment+1].mIndex,
5445            curve[segment].mDBAttenuation,
5446            decibels,
5447            curve[segment+1].mDBAttenuation,
5448            amplification);
5449
5450    return amplification;
5451}
5452
5453const AudioPolicyManager::VolumeCurvePoint
5454    AudioPolicyManager::sDefaultVolumeCurve[AudioPolicyManager::VOLCNT] = {
5455    {1, -49.5f}, {33, -33.5f}, {66, -17.0f}, {100, 0.0f}
5456};
5457
5458const AudioPolicyManager::VolumeCurvePoint
5459    AudioPolicyManager::sDefaultMediaVolumeCurve[AudioPolicyManager::VOLCNT] = {
5460    {1, -58.0f}, {20, -40.0f}, {60, -17.0f}, {100, 0.0f}
5461};
5462
5463const AudioPolicyManager::VolumeCurvePoint
5464    AudioPolicyManager::sExtMediaSystemVolumeCurve[AudioPolicyManager::VOLCNT] = {
5465    {1, -58.0f}, {20, -40.0f}, {60, -21.0f}, {100, -10.0f}
5466};
5467
5468const AudioPolicyManager::VolumeCurvePoint
5469    AudioPolicyManager::sSpeakerMediaVolumeCurve[AudioPolicyManager::VOLCNT] = {
5470    {1, -56.0f}, {20, -34.0f}, {60, -11.0f}, {100, 0.0f}
5471};
5472
5473const AudioPolicyManager::VolumeCurvePoint
5474    AudioPolicyManager::sSpeakerMediaVolumeCurveDrc[AudioPolicyManager::VOLCNT] = {
5475    {1, -55.0f}, {20, -43.0f}, {86, -12.0f}, {100, 0.0f}
5476};
5477
5478const AudioPolicyManager::VolumeCurvePoint
5479    AudioPolicyManager::sSpeakerSonificationVolumeCurve[AudioPolicyManager::VOLCNT] = {
5480    {1, -29.7f}, {33, -20.1f}, {66, -10.2f}, {100, 0.0f}
5481};
5482
5483const AudioPolicyManager::VolumeCurvePoint
5484    AudioPolicyManager::sSpeakerSonificationVolumeCurveDrc[AudioPolicyManager::VOLCNT] = {
5485    {1, -35.7f}, {33, -26.1f}, {66, -13.2f}, {100, 0.0f}
5486};
5487
5488// AUDIO_STREAM_SYSTEM, AUDIO_STREAM_ENFORCED_AUDIBLE and AUDIO_STREAM_DTMF volume tracks
5489// AUDIO_STREAM_RING on phones and AUDIO_STREAM_MUSIC on tablets.
5490// AUDIO_STREAM_DTMF tracks AUDIO_STREAM_VOICE_CALL while in call (See AudioService.java).
5491// The range is constrained between -24dB and -6dB over speaker and -30dB and -18dB over headset.
5492
5493const AudioPolicyManager::VolumeCurvePoint
5494    AudioPolicyManager::sDefaultSystemVolumeCurve[AudioPolicyManager::VOLCNT] = {
5495    {1, -24.0f}, {33, -18.0f}, {66, -12.0f}, {100, -6.0f}
5496};
5497
5498const AudioPolicyManager::VolumeCurvePoint
5499    AudioPolicyManager::sDefaultSystemVolumeCurveDrc[AudioPolicyManager::VOLCNT] = {
5500    {1, -34.0f}, {33, -24.0f}, {66, -15.0f}, {100, -6.0f}
5501};
5502
5503const AudioPolicyManager::VolumeCurvePoint
5504    AudioPolicyManager::sHeadsetSystemVolumeCurve[AudioPolicyManager::VOLCNT] = {
5505    {1, -30.0f}, {33, -26.0f}, {66, -22.0f}, {100, -18.0f}
5506};
5507
5508const AudioPolicyManager::VolumeCurvePoint
5509    AudioPolicyManager::sDefaultVoiceVolumeCurve[AudioPolicyManager::VOLCNT] = {
5510    {0, -42.0f}, {33, -28.0f}, {66, -14.0f}, {100, 0.0f}
5511};
5512
5513const AudioPolicyManager::VolumeCurvePoint
5514    AudioPolicyManager::sSpeakerVoiceVolumeCurve[AudioPolicyManager::VOLCNT] = {
5515    {0, -24.0f}, {33, -16.0f}, {66, -8.0f}, {100, 0.0f}
5516};
5517
5518const AudioPolicyManager::VolumeCurvePoint
5519    AudioPolicyManager::sLinearVolumeCurve[AudioPolicyManager::VOLCNT] = {
5520    {0, -96.0f}, {33, -68.0f}, {66, -34.0f}, {100, 0.0f}
5521};
5522
5523const AudioPolicyManager::VolumeCurvePoint
5524    AudioPolicyManager::sSilentVolumeCurve[AudioPolicyManager::VOLCNT] = {
5525    {0, -96.0f}, {1, -96.0f}, {2, -96.0f}, {100, -96.0f}
5526};
5527
5528const AudioPolicyManager::VolumeCurvePoint
5529    AudioPolicyManager::sFullScaleVolumeCurve[AudioPolicyManager::VOLCNT] = {
5530    {0, 0.0f}, {1, 0.0f}, {2, 0.0f}, {100, 0.0f}
5531};
5532
5533const AudioPolicyManager::VolumeCurvePoint
5534            *AudioPolicyManager::sVolumeProfiles[AUDIO_STREAM_CNT]
5535                                                   [AudioPolicyManager::DEVICE_CATEGORY_CNT] = {
5536    { // AUDIO_STREAM_VOICE_CALL
5537        sDefaultVoiceVolumeCurve, // DEVICE_CATEGORY_HEADSET
5538        sSpeakerVoiceVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5539        sDefaultVoiceVolumeCurve, // DEVICE_CATEGORY_EARPIECE
5540        sDefaultMediaVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5541    },
5542    { // AUDIO_STREAM_SYSTEM
5543        sHeadsetSystemVolumeCurve, // DEVICE_CATEGORY_HEADSET
5544        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5545        sDefaultSystemVolumeCurve,  // DEVICE_CATEGORY_EARPIECE
5546        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5547    },
5548    { // AUDIO_STREAM_RING
5549        sDefaultVolumeCurve, // DEVICE_CATEGORY_HEADSET
5550        sSpeakerSonificationVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5551        sDefaultVolumeCurve,  // DEVICE_CATEGORY_EARPIECE
5552        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5553    },
5554    { // AUDIO_STREAM_MUSIC
5555        sDefaultMediaVolumeCurve, // DEVICE_CATEGORY_HEADSET
5556        sSpeakerMediaVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5557        sDefaultMediaVolumeCurve, // DEVICE_CATEGORY_EARPIECE
5558        sDefaultMediaVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5559    },
5560    { // AUDIO_STREAM_ALARM
5561        sDefaultVolumeCurve, // DEVICE_CATEGORY_HEADSET
5562        sSpeakerSonificationVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5563        sDefaultVolumeCurve,  // DEVICE_CATEGORY_EARPIECE
5564        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5565    },
5566    { // AUDIO_STREAM_NOTIFICATION
5567        sDefaultVolumeCurve, // DEVICE_CATEGORY_HEADSET
5568        sSpeakerSonificationVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5569        sDefaultVolumeCurve,  // DEVICE_CATEGORY_EARPIECE
5570        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5571    },
5572    { // AUDIO_STREAM_BLUETOOTH_SCO
5573        sDefaultVoiceVolumeCurve, // DEVICE_CATEGORY_HEADSET
5574        sSpeakerVoiceVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5575        sDefaultVoiceVolumeCurve, // DEVICE_CATEGORY_EARPIECE
5576        sDefaultMediaVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5577    },
5578    { // AUDIO_STREAM_ENFORCED_AUDIBLE
5579        sHeadsetSystemVolumeCurve, // DEVICE_CATEGORY_HEADSET
5580        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5581        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_EARPIECE
5582        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5583    },
5584    {  // AUDIO_STREAM_DTMF
5585        sHeadsetSystemVolumeCurve, // DEVICE_CATEGORY_HEADSET
5586        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5587        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_EARPIECE
5588        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5589    },
5590    { // AUDIO_STREAM_TTS
5591      // "Transmitted Through Speaker": always silent except on DEVICE_CATEGORY_SPEAKER
5592        sSilentVolumeCurve, // DEVICE_CATEGORY_HEADSET
5593        sLinearVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5594        sSilentVolumeCurve, // DEVICE_CATEGORY_EARPIECE
5595        sSilentVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5596    },
5597    { // AUDIO_STREAM_ACCESSIBILITY
5598        sDefaultMediaVolumeCurve, // DEVICE_CATEGORY_HEADSET
5599        sSpeakerMediaVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5600        sDefaultMediaVolumeCurve, // DEVICE_CATEGORY_EARPIECE
5601        sDefaultMediaVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5602    },
5603    { // AUDIO_STREAM_REROUTING
5604        sFullScaleVolumeCurve, // DEVICE_CATEGORY_HEADSET
5605        sFullScaleVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5606        sFullScaleVolumeCurve, // DEVICE_CATEGORY_EARPIECE
5607        sFullScaleVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5608    },
5609    { // AUDIO_STREAM_PATCH
5610        sFullScaleVolumeCurve, // DEVICE_CATEGORY_HEADSET
5611        sFullScaleVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5612        sFullScaleVolumeCurve, // DEVICE_CATEGORY_EARPIECE
5613        sFullScaleVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5614    },
5615};
5616
5617void AudioPolicyManager::initializeVolumeCurves()
5618{
5619    for (int i = 0; i < AUDIO_STREAM_CNT; i++) {
5620        for (int j = 0; j < DEVICE_CATEGORY_CNT; j++) {
5621            mStreams[i].mVolumeCurve[j] =
5622                    sVolumeProfiles[i][j];
5623        }
5624    }
5625
5626    // Check availability of DRC on speaker path: if available, override some of the speaker curves
5627    if (mSpeakerDrcEnabled) {
5628        mStreams[AUDIO_STREAM_SYSTEM].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
5629                sDefaultSystemVolumeCurveDrc;
5630        mStreams[AUDIO_STREAM_RING].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
5631                sSpeakerSonificationVolumeCurveDrc;
5632        mStreams[AUDIO_STREAM_ALARM].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
5633                sSpeakerSonificationVolumeCurveDrc;
5634        mStreams[AUDIO_STREAM_NOTIFICATION].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
5635                sSpeakerSonificationVolumeCurveDrc;
5636        mStreams[AUDIO_STREAM_MUSIC].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
5637                sSpeakerMediaVolumeCurveDrc;
5638        mStreams[AUDIO_STREAM_ACCESSIBILITY].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
5639                sSpeakerMediaVolumeCurveDrc;
5640    }
5641}
5642
5643float AudioPolicyManager::computeVolume(audio_stream_type_t stream,
5644                                            int index,
5645                                            audio_io_handle_t output,
5646                                            audio_devices_t device)
5647{
5648    float volume = 1.0;
5649    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
5650    StreamDescriptor &streamDesc = mStreams[stream];
5651
5652    if (device == AUDIO_DEVICE_NONE) {
5653        device = outputDesc->device();
5654    }
5655
5656    volume = volIndexToAmpl(device, streamDesc, index);
5657
5658    // if a headset is connected, apply the following rules to ring tones and notifications
5659    // to avoid sound level bursts in user's ears:
5660    // - always attenuate ring tones and notifications volume by 6dB
5661    // - if music is playing, always limit the volume to current music volume,
5662    // with a minimum threshold at -36dB so that notification is always perceived.
5663    const routing_strategy stream_strategy = getStrategy(stream);
5664    if ((device & (AUDIO_DEVICE_OUT_BLUETOOTH_A2DP |
5665            AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES |
5666            AUDIO_DEVICE_OUT_WIRED_HEADSET |
5667            AUDIO_DEVICE_OUT_WIRED_HEADPHONE)) &&
5668        ((stream_strategy == STRATEGY_SONIFICATION)
5669                || (stream_strategy == STRATEGY_SONIFICATION_RESPECTFUL)
5670                || (stream == AUDIO_STREAM_SYSTEM)
5671                || ((stream_strategy == STRATEGY_ENFORCED_AUDIBLE) &&
5672                    (mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] == AUDIO_POLICY_FORCE_NONE))) &&
5673        streamDesc.mCanBeMuted) {
5674        volume *= SONIFICATION_HEADSET_VOLUME_FACTOR;
5675        // when the phone is ringing we must consider that music could have been paused just before
5676        // by the music application and behave as if music was active if the last music track was
5677        // just stopped
5678        if (isStreamActive(AUDIO_STREAM_MUSIC, SONIFICATION_HEADSET_MUSIC_DELAY) ||
5679                mLimitRingtoneVolume) {
5680            audio_devices_t musicDevice = getDeviceForStrategy(STRATEGY_MEDIA, true /*fromCache*/);
5681            float musicVol = computeVolume(AUDIO_STREAM_MUSIC,
5682                               mStreams[AUDIO_STREAM_MUSIC].getVolumeIndex(musicDevice),
5683                               output,
5684                               musicDevice);
5685            float minVol = (musicVol > SONIFICATION_HEADSET_VOLUME_MIN) ?
5686                                musicVol : SONIFICATION_HEADSET_VOLUME_MIN;
5687            if (volume > minVol) {
5688                volume = minVol;
5689                ALOGV("computeVolume limiting volume to %f musicVol %f", minVol, musicVol);
5690            }
5691        }
5692    }
5693
5694    return volume;
5695}
5696
5697status_t AudioPolicyManager::checkAndSetVolume(audio_stream_type_t stream,
5698                                                   int index,
5699                                                   audio_io_handle_t output,
5700                                                   audio_devices_t device,
5701                                                   int delayMs,
5702                                                   bool force)
5703{
5704
5705    // do not change actual stream volume if the stream is muted
5706    if (mOutputs.valueFor(output)->mMuteCount[stream] != 0) {
5707        ALOGVV("checkAndSetVolume() stream %d muted count %d",
5708              stream, mOutputs.valueFor(output)->mMuteCount[stream]);
5709        return NO_ERROR;
5710    }
5711
5712    // do not change in call volume if bluetooth is connected and vice versa
5713    if ((stream == AUDIO_STREAM_VOICE_CALL &&
5714            mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION] == AUDIO_POLICY_FORCE_BT_SCO) ||
5715        (stream == AUDIO_STREAM_BLUETOOTH_SCO &&
5716                mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION] != AUDIO_POLICY_FORCE_BT_SCO)) {
5717        ALOGV("checkAndSetVolume() cannot set stream %d volume with force use = %d for comm",
5718             stream, mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION]);
5719        return INVALID_OPERATION;
5720    }
5721
5722    float volume = computeVolume(stream, index, output, device);
5723    // unit gain if rerouting to external policy
5724    if (device == AUDIO_DEVICE_OUT_REMOTE_SUBMIX) {
5725        ssize_t index = mOutputs.indexOfKey(output);
5726        if (index >= 0) {
5727            sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(index);
5728            if (outputDesc->mPolicyMix != NULL) {
5729                ALOGV("max gain when rerouting for output=%d", output);
5730                volume = 1.0f;
5731            }
5732        }
5733
5734    }
5735    // We actually change the volume if:
5736    // - the float value returned by computeVolume() changed
5737    // - the force flag is set
5738    if (volume != mOutputs.valueFor(output)->mCurVolume[stream] ||
5739            force) {
5740        mOutputs.valueFor(output)->mCurVolume[stream] = volume;
5741        ALOGVV("checkAndSetVolume() for output %d stream %d, volume %f, delay %d", output, stream, volume, delayMs);
5742        // Force VOICE_CALL to track BLUETOOTH_SCO stream volume when bluetooth audio is
5743        // enabled
5744        if (stream == AUDIO_STREAM_BLUETOOTH_SCO) {
5745            mpClientInterface->setStreamVolume(AUDIO_STREAM_VOICE_CALL, volume, output, delayMs);
5746        }
5747        mpClientInterface->setStreamVolume(stream, volume, output, delayMs);
5748    }
5749
5750    if (stream == AUDIO_STREAM_VOICE_CALL ||
5751        stream == AUDIO_STREAM_BLUETOOTH_SCO) {
5752        float voiceVolume;
5753        // Force voice volume to max for bluetooth SCO as volume is managed by the headset
5754        if (stream == AUDIO_STREAM_VOICE_CALL) {
5755            voiceVolume = (float)index/(float)mStreams[stream].mIndexMax;
5756        } else {
5757            voiceVolume = 1.0;
5758        }
5759
5760        if (voiceVolume != mLastVoiceVolume && output == mPrimaryOutput) {
5761            mpClientInterface->setVoiceVolume(voiceVolume, delayMs);
5762            mLastVoiceVolume = voiceVolume;
5763        }
5764    }
5765
5766    return NO_ERROR;
5767}
5768
5769void AudioPolicyManager::applyStreamVolumes(audio_io_handle_t output,
5770                                                audio_devices_t device,
5771                                                int delayMs,
5772                                                bool force)
5773{
5774    ALOGVV("applyStreamVolumes() for output %d and device %x", output, device);
5775
5776    for (int stream = 0; stream < AUDIO_STREAM_CNT; stream++) {
5777        if (stream == AUDIO_STREAM_PATCH) {
5778            continue;
5779        }
5780        checkAndSetVolume((audio_stream_type_t)stream,
5781                          mStreams[stream].getVolumeIndex(device),
5782                          output,
5783                          device,
5784                          delayMs,
5785                          force);
5786    }
5787}
5788
5789void AudioPolicyManager::setStrategyMute(routing_strategy strategy,
5790                                             bool on,
5791                                             audio_io_handle_t output,
5792                                             int delayMs,
5793                                             audio_devices_t device)
5794{
5795    ALOGVV("setStrategyMute() strategy %d, mute %d, output %d", strategy, on, output);
5796    for (int stream = 0; stream < AUDIO_STREAM_CNT; stream++) {
5797        if (stream == AUDIO_STREAM_PATCH) {
5798            continue;
5799        }
5800        if (getStrategy((audio_stream_type_t)stream) == strategy) {
5801            setStreamMute((audio_stream_type_t)stream, on, output, delayMs, device);
5802        }
5803    }
5804}
5805
5806void AudioPolicyManager::setStreamMute(audio_stream_type_t stream,
5807                                           bool on,
5808                                           audio_io_handle_t output,
5809                                           int delayMs,
5810                                           audio_devices_t device)
5811{
5812    StreamDescriptor &streamDesc = mStreams[stream];
5813    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
5814    if (device == AUDIO_DEVICE_NONE) {
5815        device = outputDesc->device();
5816    }
5817
5818    ALOGVV("setStreamMute() stream %d, mute %d, output %d, mMuteCount %d device %04x",
5819          stream, on, output, outputDesc->mMuteCount[stream], device);
5820
5821    if (on) {
5822        if (outputDesc->mMuteCount[stream] == 0) {
5823            if (streamDesc.mCanBeMuted &&
5824                    ((stream != AUDIO_STREAM_ENFORCED_AUDIBLE) ||
5825                     (mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] == AUDIO_POLICY_FORCE_NONE))) {
5826                checkAndSetVolume(stream, 0, output, device, delayMs);
5827            }
5828        }
5829        // increment mMuteCount after calling checkAndSetVolume() so that volume change is not ignored
5830        outputDesc->mMuteCount[stream]++;
5831    } else {
5832        if (outputDesc->mMuteCount[stream] == 0) {
5833            ALOGV("setStreamMute() unmuting non muted stream!");
5834            return;
5835        }
5836        if (--outputDesc->mMuteCount[stream] == 0) {
5837            checkAndSetVolume(stream,
5838                              streamDesc.getVolumeIndex(device),
5839                              output,
5840                              device,
5841                              delayMs);
5842        }
5843    }
5844}
5845
5846void AudioPolicyManager::handleIncallSonification(audio_stream_type_t stream,
5847                                                      bool starting, bool stateChange)
5848{
5849    // if the stream pertains to sonification strategy and we are in call we must
5850    // mute the stream if it is low visibility. If it is high visibility, we must play a tone
5851    // in the device used for phone strategy and play the tone if the selected device does not
5852    // interfere with the device used for phone strategy
5853    // if stateChange is true, we are called from setPhoneState() and we must mute or unmute as
5854    // many times as there are active tracks on the output
5855    const routing_strategy stream_strategy = getStrategy(stream);
5856    if ((stream_strategy == STRATEGY_SONIFICATION) ||
5857            ((stream_strategy == STRATEGY_SONIFICATION_RESPECTFUL))) {
5858        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(mPrimaryOutput);
5859        ALOGV("handleIncallSonification() stream %d starting %d device %x stateChange %d",
5860                stream, starting, outputDesc->mDevice, stateChange);
5861        if (outputDesc->mRefCount[stream]) {
5862            int muteCount = 1;
5863            if (stateChange) {
5864                muteCount = outputDesc->mRefCount[stream];
5865            }
5866            if (audio_is_low_visibility(stream)) {
5867                ALOGV("handleIncallSonification() low visibility, muteCount %d", muteCount);
5868                for (int i = 0; i < muteCount; i++) {
5869                    setStreamMute(stream, starting, mPrimaryOutput);
5870                }
5871            } else {
5872                ALOGV("handleIncallSonification() high visibility");
5873                if (outputDesc->device() &
5874                        getDeviceForStrategy(STRATEGY_PHONE, true /*fromCache*/)) {
5875                    ALOGV("handleIncallSonification() high visibility muted, muteCount %d", muteCount);
5876                    for (int i = 0; i < muteCount; i++) {
5877                        setStreamMute(stream, starting, mPrimaryOutput);
5878                    }
5879                }
5880                if (starting) {
5881                    mpClientInterface->startTone(AUDIO_POLICY_TONE_IN_CALL_NOTIFICATION,
5882                                                 AUDIO_STREAM_VOICE_CALL);
5883                } else {
5884                    mpClientInterface->stopTone();
5885                }
5886            }
5887        }
5888    }
5889}
5890
5891bool AudioPolicyManager::isInCall()
5892{
5893    return isStateInCall(mPhoneState);
5894}
5895
5896bool AudioPolicyManager::isStateInCall(int state) {
5897    return ((state == AUDIO_MODE_IN_CALL) ||
5898            (state == AUDIO_MODE_IN_COMMUNICATION));
5899}
5900
5901uint32_t AudioPolicyManager::getMaxEffectsCpuLoad()
5902{
5903    return MAX_EFFECTS_CPU_LOAD;
5904}
5905
5906uint32_t AudioPolicyManager::getMaxEffectsMemory()
5907{
5908    return MAX_EFFECTS_MEMORY;
5909}
5910
5911
5912// --- AudioOutputDescriptor class implementation
5913
5914AudioPolicyManager::AudioOutputDescriptor::AudioOutputDescriptor(
5915        const sp<IOProfile>& profile)
5916    : mId(0), mIoHandle(0), mLatency(0),
5917    mFlags((audio_output_flags_t)0), mDevice(AUDIO_DEVICE_NONE), mPolicyMix(NULL),
5918    mPatchHandle(0),
5919    mOutput1(0), mOutput2(0), mProfile(profile), mDirectOpenCount(0)
5920{
5921    // clear usage count for all stream types
5922    for (int i = 0; i < AUDIO_STREAM_CNT; i++) {
5923        mRefCount[i] = 0;
5924        mCurVolume[i] = -1.0;
5925        mMuteCount[i] = 0;
5926        mStopTime[i] = 0;
5927    }
5928    for (int i = 0; i < NUM_STRATEGIES; i++) {
5929        mStrategyMutedByDevice[i] = false;
5930    }
5931    if (profile != NULL) {
5932        mFlags = (audio_output_flags_t)profile->mFlags;
5933        mSamplingRate = profile->pickSamplingRate();
5934        mFormat = profile->pickFormat();
5935        mChannelMask = profile->pickChannelMask();
5936        if (profile->mGains.size() > 0) {
5937            profile->mGains[0]->getDefaultConfig(&mGain);
5938        }
5939    }
5940}
5941
5942audio_devices_t AudioPolicyManager::AudioOutputDescriptor::device() const
5943{
5944    if (isDuplicated()) {
5945        return (audio_devices_t)(mOutput1->mDevice | mOutput2->mDevice);
5946    } else {
5947        return mDevice;
5948    }
5949}
5950
5951uint32_t AudioPolicyManager::AudioOutputDescriptor::latency()
5952{
5953    if (isDuplicated()) {
5954        return (mOutput1->mLatency > mOutput2->mLatency) ? mOutput1->mLatency : mOutput2->mLatency;
5955    } else {
5956        return mLatency;
5957    }
5958}
5959
5960bool AudioPolicyManager::AudioOutputDescriptor::sharesHwModuleWith(
5961        const sp<AudioOutputDescriptor> outputDesc)
5962{
5963    if (isDuplicated()) {
5964        return mOutput1->sharesHwModuleWith(outputDesc) || mOutput2->sharesHwModuleWith(outputDesc);
5965    } else if (outputDesc->isDuplicated()){
5966        return sharesHwModuleWith(outputDesc->mOutput1) || sharesHwModuleWith(outputDesc->mOutput2);
5967    } else {
5968        return (mProfile->mModule == outputDesc->mProfile->mModule);
5969    }
5970}
5971
5972void AudioPolicyManager::AudioOutputDescriptor::changeRefCount(audio_stream_type_t stream,
5973                                                                   int delta)
5974{
5975    // forward usage count change to attached outputs
5976    if (isDuplicated()) {
5977        mOutput1->changeRefCount(stream, delta);
5978        mOutput2->changeRefCount(stream, delta);
5979    }
5980    if ((delta + (int)mRefCount[stream]) < 0) {
5981        ALOGW("changeRefCount() invalid delta %d for stream %d, refCount %d",
5982              delta, stream, mRefCount[stream]);
5983        mRefCount[stream] = 0;
5984        return;
5985    }
5986    mRefCount[stream] += delta;
5987    ALOGV("changeRefCount() stream %d, count %d", stream, mRefCount[stream]);
5988}
5989
5990audio_devices_t AudioPolicyManager::AudioOutputDescriptor::supportedDevices()
5991{
5992    if (isDuplicated()) {
5993        return (audio_devices_t)(mOutput1->supportedDevices() | mOutput2->supportedDevices());
5994    } else {
5995        return mProfile->mSupportedDevices.types() ;
5996    }
5997}
5998
5999bool AudioPolicyManager::AudioOutputDescriptor::isActive(uint32_t inPastMs) const
6000{
6001    return isStrategyActive(NUM_STRATEGIES, inPastMs);
6002}
6003
6004bool AudioPolicyManager::AudioOutputDescriptor::isStrategyActive(routing_strategy strategy,
6005                                                                       uint32_t inPastMs,
6006                                                                       nsecs_t sysTime) const
6007{
6008    if ((sysTime == 0) && (inPastMs != 0)) {
6009        sysTime = systemTime();
6010    }
6011    for (int i = 0; i < (int)AUDIO_STREAM_CNT; i++) {
6012        if (i == AUDIO_STREAM_PATCH) {
6013            continue;
6014        }
6015        if (((getStrategy((audio_stream_type_t)i) == strategy) ||
6016                (NUM_STRATEGIES == strategy)) &&
6017                isStreamActive((audio_stream_type_t)i, inPastMs, sysTime)) {
6018            return true;
6019        }
6020    }
6021    return false;
6022}
6023
6024bool AudioPolicyManager::AudioOutputDescriptor::isStreamActive(audio_stream_type_t stream,
6025                                                                       uint32_t inPastMs,
6026                                                                       nsecs_t sysTime) const
6027{
6028    if (mRefCount[stream] != 0) {
6029        return true;
6030    }
6031    if (inPastMs == 0) {
6032        return false;
6033    }
6034    if (sysTime == 0) {
6035        sysTime = systemTime();
6036    }
6037    if (ns2ms(sysTime - mStopTime[stream]) < inPastMs) {
6038        return true;
6039    }
6040    return false;
6041}
6042
6043void AudioPolicyManager::AudioOutputDescriptor::toAudioPortConfig(
6044                                                 struct audio_port_config *dstConfig,
6045                                                 const struct audio_port_config *srcConfig) const
6046{
6047    ALOG_ASSERT(!isDuplicated(), "toAudioPortConfig() called on duplicated output %d", mIoHandle);
6048
6049    dstConfig->config_mask = AUDIO_PORT_CONFIG_SAMPLE_RATE|AUDIO_PORT_CONFIG_CHANNEL_MASK|
6050                            AUDIO_PORT_CONFIG_FORMAT|AUDIO_PORT_CONFIG_GAIN;
6051    if (srcConfig != NULL) {
6052        dstConfig->config_mask |= srcConfig->config_mask;
6053    }
6054    AudioPortConfig::toAudioPortConfig(dstConfig, srcConfig);
6055
6056    dstConfig->id = mId;
6057    dstConfig->role = AUDIO_PORT_ROLE_SOURCE;
6058    dstConfig->type = AUDIO_PORT_TYPE_MIX;
6059    dstConfig->ext.mix.hw_module = mProfile->mModule->mHandle;
6060    dstConfig->ext.mix.handle = mIoHandle;
6061    dstConfig->ext.mix.usecase.stream = AUDIO_STREAM_DEFAULT;
6062}
6063
6064void AudioPolicyManager::AudioOutputDescriptor::toAudioPort(
6065                                                    struct audio_port *port) const
6066{
6067    ALOG_ASSERT(!isDuplicated(), "toAudioPort() called on duplicated output %d", mIoHandle);
6068    mProfile->toAudioPort(port);
6069    port->id = mId;
6070    toAudioPortConfig(&port->active_config);
6071    port->ext.mix.hw_module = mProfile->mModule->mHandle;
6072    port->ext.mix.handle = mIoHandle;
6073    port->ext.mix.latency_class =
6074            mFlags & AUDIO_OUTPUT_FLAG_FAST ? AUDIO_LATENCY_LOW : AUDIO_LATENCY_NORMAL;
6075}
6076
6077status_t AudioPolicyManager::AudioOutputDescriptor::dump(int fd)
6078{
6079    const size_t SIZE = 256;
6080    char buffer[SIZE];
6081    String8 result;
6082
6083    snprintf(buffer, SIZE, " ID: %d\n", mId);
6084    result.append(buffer);
6085    snprintf(buffer, SIZE, " Sampling rate: %d\n", mSamplingRate);
6086    result.append(buffer);
6087    snprintf(buffer, SIZE, " Format: %08x\n", mFormat);
6088    result.append(buffer);
6089    snprintf(buffer, SIZE, " Channels: %08x\n", mChannelMask);
6090    result.append(buffer);
6091    snprintf(buffer, SIZE, " Latency: %d\n", mLatency);
6092    result.append(buffer);
6093    snprintf(buffer, SIZE, " Flags %08x\n", mFlags);
6094    result.append(buffer);
6095    snprintf(buffer, SIZE, " Devices %08x\n", device());
6096    result.append(buffer);
6097    snprintf(buffer, SIZE, " Stream volume refCount muteCount\n");
6098    result.append(buffer);
6099    for (int i = 0; i < (int)AUDIO_STREAM_CNT; i++) {
6100        snprintf(buffer, SIZE, " %02d     %.03f     %02d       %02d\n",
6101                 i, mCurVolume[i], mRefCount[i], mMuteCount[i]);
6102        result.append(buffer);
6103    }
6104    write(fd, result.string(), result.size());
6105
6106    return NO_ERROR;
6107}
6108
6109// --- AudioInputDescriptor class implementation
6110
6111AudioPolicyManager::AudioInputDescriptor::AudioInputDescriptor(const sp<IOProfile>& profile)
6112    : mId(0), mIoHandle(0),
6113      mDevice(AUDIO_DEVICE_NONE), mPolicyMix(NULL), mPatchHandle(0), mRefCount(0),
6114      mInputSource(AUDIO_SOURCE_DEFAULT), mProfile(profile), mIsSoundTrigger(false)
6115{
6116    if (profile != NULL) {
6117        mSamplingRate = profile->pickSamplingRate();
6118        mFormat = profile->pickFormat();
6119        mChannelMask = profile->pickChannelMask();
6120        if (profile->mGains.size() > 0) {
6121            profile->mGains[0]->getDefaultConfig(&mGain);
6122        }
6123    }
6124}
6125
6126void AudioPolicyManager::AudioInputDescriptor::toAudioPortConfig(
6127                                                   struct audio_port_config *dstConfig,
6128                                                   const struct audio_port_config *srcConfig) const
6129{
6130    ALOG_ASSERT(mProfile != 0,
6131                "toAudioPortConfig() called on input with null profile %d", mIoHandle);
6132    dstConfig->config_mask = AUDIO_PORT_CONFIG_SAMPLE_RATE|AUDIO_PORT_CONFIG_CHANNEL_MASK|
6133                            AUDIO_PORT_CONFIG_FORMAT|AUDIO_PORT_CONFIG_GAIN;
6134    if (srcConfig != NULL) {
6135        dstConfig->config_mask |= srcConfig->config_mask;
6136    }
6137
6138    AudioPortConfig::toAudioPortConfig(dstConfig, srcConfig);
6139
6140    dstConfig->id = mId;
6141    dstConfig->role = AUDIO_PORT_ROLE_SINK;
6142    dstConfig->type = AUDIO_PORT_TYPE_MIX;
6143    dstConfig->ext.mix.hw_module = mProfile->mModule->mHandle;
6144    dstConfig->ext.mix.handle = mIoHandle;
6145    dstConfig->ext.mix.usecase.source = mInputSource;
6146}
6147
6148void AudioPolicyManager::AudioInputDescriptor::toAudioPort(
6149                                                    struct audio_port *port) const
6150{
6151    ALOG_ASSERT(mProfile != 0, "toAudioPort() called on input with null profile %d", mIoHandle);
6152
6153    mProfile->toAudioPort(port);
6154    port->id = mId;
6155    toAudioPortConfig(&port->active_config);
6156    port->ext.mix.hw_module = mProfile->mModule->mHandle;
6157    port->ext.mix.handle = mIoHandle;
6158    port->ext.mix.latency_class = AUDIO_LATENCY_NORMAL;
6159}
6160
6161status_t AudioPolicyManager::AudioInputDescriptor::dump(int fd)
6162{
6163    const size_t SIZE = 256;
6164    char buffer[SIZE];
6165    String8 result;
6166
6167    snprintf(buffer, SIZE, " ID: %d\n", mId);
6168    result.append(buffer);
6169    snprintf(buffer, SIZE, " Sampling rate: %d\n", mSamplingRate);
6170    result.append(buffer);
6171    snprintf(buffer, SIZE, " Format: %d\n", mFormat);
6172    result.append(buffer);
6173    snprintf(buffer, SIZE, " Channels: %08x\n", mChannelMask);
6174    result.append(buffer);
6175    snprintf(buffer, SIZE, " Devices %08x\n", mDevice);
6176    result.append(buffer);
6177    snprintf(buffer, SIZE, " Ref Count %d\n", mRefCount);
6178    result.append(buffer);
6179    snprintf(buffer, SIZE, " Open Ref Count %d\n", mOpenRefCount);
6180    result.append(buffer);
6181
6182    write(fd, result.string(), result.size());
6183
6184    return NO_ERROR;
6185}
6186
6187// --- StreamDescriptor class implementation
6188
6189AudioPolicyManager::StreamDescriptor::StreamDescriptor()
6190    :   mIndexMin(0), mIndexMax(1), mCanBeMuted(true)
6191{
6192    mIndexCur.add(AUDIO_DEVICE_OUT_DEFAULT, 0);
6193}
6194
6195int AudioPolicyManager::StreamDescriptor::getVolumeIndex(audio_devices_t device)
6196{
6197    device = AudioPolicyManager::getDeviceForVolume(device);
6198    // there is always a valid entry for AUDIO_DEVICE_OUT_DEFAULT
6199    if (mIndexCur.indexOfKey(device) < 0) {
6200        device = AUDIO_DEVICE_OUT_DEFAULT;
6201    }
6202    return mIndexCur.valueFor(device);
6203}
6204
6205void AudioPolicyManager::StreamDescriptor::dump(int fd)
6206{
6207    const size_t SIZE = 256;
6208    char buffer[SIZE];
6209    String8 result;
6210
6211    snprintf(buffer, SIZE, "%s         %02d         %02d         ",
6212             mCanBeMuted ? "true " : "false", mIndexMin, mIndexMax);
6213    result.append(buffer);
6214    for (size_t i = 0; i < mIndexCur.size(); i++) {
6215        snprintf(buffer, SIZE, "%04x : %02d, ",
6216                 mIndexCur.keyAt(i),
6217                 mIndexCur.valueAt(i));
6218        result.append(buffer);
6219    }
6220    result.append("\n");
6221
6222    write(fd, result.string(), result.size());
6223}
6224
6225// --- EffectDescriptor class implementation
6226
6227status_t AudioPolicyManager::EffectDescriptor::dump(int fd)
6228{
6229    const size_t SIZE = 256;
6230    char buffer[SIZE];
6231    String8 result;
6232
6233    snprintf(buffer, SIZE, " I/O: %d\n", mIo);
6234    result.append(buffer);
6235    snprintf(buffer, SIZE, " Strategy: %d\n", mStrategy);
6236    result.append(buffer);
6237    snprintf(buffer, SIZE, " Session: %d\n", mSession);
6238    result.append(buffer);
6239    snprintf(buffer, SIZE, " Name: %s\n",  mDesc.name);
6240    result.append(buffer);
6241    snprintf(buffer, SIZE, " %s\n",  mEnabled ? "Enabled" : "Disabled");
6242    result.append(buffer);
6243    write(fd, result.string(), result.size());
6244
6245    return NO_ERROR;
6246}
6247
6248// --- HwModule class implementation
6249
6250AudioPolicyManager::HwModule::HwModule(const char *name)
6251    : mName(strndup(name, AUDIO_HARDWARE_MODULE_ID_MAX_LEN)),
6252      mHalVersion(AUDIO_DEVICE_API_VERSION_MIN), mHandle(0)
6253{
6254}
6255
6256AudioPolicyManager::HwModule::~HwModule()
6257{
6258    for (size_t i = 0; i < mOutputProfiles.size(); i++) {
6259        mOutputProfiles[i]->mSupportedDevices.clear();
6260    }
6261    for (size_t i = 0; i < mInputProfiles.size(); i++) {
6262        mInputProfiles[i]->mSupportedDevices.clear();
6263    }
6264    free((void *)mName);
6265}
6266
6267status_t AudioPolicyManager::HwModule::loadInput(cnode *root)
6268{
6269    cnode *node = root->first_child;
6270
6271    sp<IOProfile> profile = new IOProfile(String8(root->name), AUDIO_PORT_ROLE_SINK, this);
6272
6273    while (node) {
6274        if (strcmp(node->name, SAMPLING_RATES_TAG) == 0) {
6275            profile->loadSamplingRates((char *)node->value);
6276        } else if (strcmp(node->name, FORMATS_TAG) == 0) {
6277            profile->loadFormats((char *)node->value);
6278        } else if (strcmp(node->name, CHANNELS_TAG) == 0) {
6279            profile->loadInChannels((char *)node->value);
6280        } else if (strcmp(node->name, DEVICES_TAG) == 0) {
6281            profile->mSupportedDevices.loadDevicesFromName((char *)node->value,
6282                                                           mDeclaredDevices);
6283        } else if (strcmp(node->name, FLAGS_TAG) == 0) {
6284            profile->mFlags = parseInputFlagNames((char *)node->value);
6285        } else if (strcmp(node->name, GAINS_TAG) == 0) {
6286            profile->loadGains(node);
6287        }
6288        node = node->next;
6289    }
6290    ALOGW_IF(profile->mSupportedDevices.isEmpty(),
6291            "loadInput() invalid supported devices");
6292    ALOGW_IF(profile->mChannelMasks.size() == 0,
6293            "loadInput() invalid supported channel masks");
6294    ALOGW_IF(profile->mSamplingRates.size() == 0,
6295            "loadInput() invalid supported sampling rates");
6296    ALOGW_IF(profile->mFormats.size() == 0,
6297            "loadInput() invalid supported formats");
6298    if (!profile->mSupportedDevices.isEmpty() &&
6299            (profile->mChannelMasks.size() != 0) &&
6300            (profile->mSamplingRates.size() != 0) &&
6301            (profile->mFormats.size() != 0)) {
6302
6303        ALOGV("loadInput() adding input Supported Devices %04x",
6304              profile->mSupportedDevices.types());
6305
6306        mInputProfiles.add(profile);
6307        return NO_ERROR;
6308    } else {
6309        return BAD_VALUE;
6310    }
6311}
6312
6313status_t AudioPolicyManager::HwModule::loadOutput(cnode *root)
6314{
6315    cnode *node = root->first_child;
6316
6317    sp<IOProfile> profile = new IOProfile(String8(root->name), AUDIO_PORT_ROLE_SOURCE, this);
6318
6319    while (node) {
6320        if (strcmp(node->name, SAMPLING_RATES_TAG) == 0) {
6321            profile->loadSamplingRates((char *)node->value);
6322        } else if (strcmp(node->name, FORMATS_TAG) == 0) {
6323            profile->loadFormats((char *)node->value);
6324        } else if (strcmp(node->name, CHANNELS_TAG) == 0) {
6325            profile->loadOutChannels((char *)node->value);
6326        } else if (strcmp(node->name, DEVICES_TAG) == 0) {
6327            profile->mSupportedDevices.loadDevicesFromName((char *)node->value,
6328                                                           mDeclaredDevices);
6329        } else if (strcmp(node->name, FLAGS_TAG) == 0) {
6330            profile->mFlags = parseOutputFlagNames((char *)node->value);
6331        } else if (strcmp(node->name, GAINS_TAG) == 0) {
6332            profile->loadGains(node);
6333        }
6334        node = node->next;
6335    }
6336    ALOGW_IF(profile->mSupportedDevices.isEmpty(),
6337            "loadOutput() invalid supported devices");
6338    ALOGW_IF(profile->mChannelMasks.size() == 0,
6339            "loadOutput() invalid supported channel masks");
6340    ALOGW_IF(profile->mSamplingRates.size() == 0,
6341            "loadOutput() invalid supported sampling rates");
6342    ALOGW_IF(profile->mFormats.size() == 0,
6343            "loadOutput() invalid supported formats");
6344    if (!profile->mSupportedDevices.isEmpty() &&
6345            (profile->mChannelMasks.size() != 0) &&
6346            (profile->mSamplingRates.size() != 0) &&
6347            (profile->mFormats.size() != 0)) {
6348
6349        ALOGV("loadOutput() adding output Supported Devices %04x, mFlags %04x",
6350              profile->mSupportedDevices.types(), profile->mFlags);
6351
6352        mOutputProfiles.add(profile);
6353        return NO_ERROR;
6354    } else {
6355        return BAD_VALUE;
6356    }
6357}
6358
6359status_t AudioPolicyManager::HwModule::loadDevice(cnode *root)
6360{
6361    cnode *node = root->first_child;
6362
6363    audio_devices_t type = AUDIO_DEVICE_NONE;
6364    while (node) {
6365        if (strcmp(node->name, DEVICE_TYPE) == 0) {
6366            type = parseDeviceNames((char *)node->value);
6367            break;
6368        }
6369        node = node->next;
6370    }
6371    if (type == AUDIO_DEVICE_NONE ||
6372            (!audio_is_input_device(type) && !audio_is_output_device(type))) {
6373        ALOGW("loadDevice() bad type %08x", type);
6374        return BAD_VALUE;
6375    }
6376    sp<DeviceDescriptor> deviceDesc = new DeviceDescriptor(String8(root->name), type);
6377    deviceDesc->mModule = this;
6378
6379    node = root->first_child;
6380    while (node) {
6381        if (strcmp(node->name, DEVICE_ADDRESS) == 0) {
6382            deviceDesc->mAddress = String8((char *)node->value);
6383        } else if (strcmp(node->name, CHANNELS_TAG) == 0) {
6384            if (audio_is_input_device(type)) {
6385                deviceDesc->loadInChannels((char *)node->value);
6386            } else {
6387                deviceDesc->loadOutChannels((char *)node->value);
6388            }
6389        } else if (strcmp(node->name, GAINS_TAG) == 0) {
6390            deviceDesc->loadGains(node);
6391        }
6392        node = node->next;
6393    }
6394
6395    ALOGV("loadDevice() adding device name %s type %08x address %s",
6396          deviceDesc->mName.string(), type, deviceDesc->mAddress.string());
6397
6398    mDeclaredDevices.add(deviceDesc);
6399
6400    return NO_ERROR;
6401}
6402
6403status_t AudioPolicyManager::HwModule::addOutputProfile(String8 name, const audio_config_t *config,
6404                                                  audio_devices_t device, String8 address)
6405{
6406    sp<IOProfile> profile = new IOProfile(name, AUDIO_PORT_ROLE_SOURCE, this);
6407
6408    profile->mSamplingRates.add(config->sample_rate);
6409    profile->mChannelMasks.add(config->channel_mask);
6410    profile->mFormats.add(config->format);
6411
6412    sp<DeviceDescriptor> devDesc = new DeviceDescriptor(String8(""), device);
6413    devDesc->mAddress = address;
6414    profile->mSupportedDevices.add(devDesc);
6415
6416    mOutputProfiles.add(profile);
6417
6418    return NO_ERROR;
6419}
6420
6421status_t AudioPolicyManager::HwModule::removeOutputProfile(String8 name)
6422{
6423    for (size_t i = 0; i < mOutputProfiles.size(); i++) {
6424        if (mOutputProfiles[i]->mName == name) {
6425            mOutputProfiles.removeAt(i);
6426            break;
6427        }
6428    }
6429
6430    return NO_ERROR;
6431}
6432
6433status_t AudioPolicyManager::HwModule::addInputProfile(String8 name, const audio_config_t *config,
6434                                                  audio_devices_t device, String8 address)
6435{
6436    sp<IOProfile> profile = new IOProfile(name, AUDIO_PORT_ROLE_SINK, this);
6437
6438    profile->mSamplingRates.add(config->sample_rate);
6439    profile->mChannelMasks.add(config->channel_mask);
6440    profile->mFormats.add(config->format);
6441
6442    sp<DeviceDescriptor> devDesc = new DeviceDescriptor(String8(""), device);
6443    devDesc->mAddress = address;
6444    profile->mSupportedDevices.add(devDesc);
6445
6446    ALOGV("addInputProfile() name %s rate %d mask 0x08", name.string(), config->sample_rate, config->channel_mask);
6447
6448    mInputProfiles.add(profile);
6449
6450    return NO_ERROR;
6451}
6452
6453status_t AudioPolicyManager::HwModule::removeInputProfile(String8 name)
6454{
6455    for (size_t i = 0; i < mInputProfiles.size(); i++) {
6456        if (mInputProfiles[i]->mName == name) {
6457            mInputProfiles.removeAt(i);
6458            break;
6459        }
6460    }
6461
6462    return NO_ERROR;
6463}
6464
6465
6466void AudioPolicyManager::HwModule::dump(int fd)
6467{
6468    const size_t SIZE = 256;
6469    char buffer[SIZE];
6470    String8 result;
6471
6472    snprintf(buffer, SIZE, "  - name: %s\n", mName);
6473    result.append(buffer);
6474    snprintf(buffer, SIZE, "  - handle: %d\n", mHandle);
6475    result.append(buffer);
6476    snprintf(buffer, SIZE, "  - version: %u.%u\n", mHalVersion >> 8, mHalVersion & 0xFF);
6477    result.append(buffer);
6478    write(fd, result.string(), result.size());
6479    if (mOutputProfiles.size()) {
6480        write(fd, "  - outputs:\n", strlen("  - outputs:\n"));
6481        for (size_t i = 0; i < mOutputProfiles.size(); i++) {
6482            snprintf(buffer, SIZE, "    output %zu:\n", i);
6483            write(fd, buffer, strlen(buffer));
6484            mOutputProfiles[i]->dump(fd);
6485        }
6486    }
6487    if (mInputProfiles.size()) {
6488        write(fd, "  - inputs:\n", strlen("  - inputs:\n"));
6489        for (size_t i = 0; i < mInputProfiles.size(); i++) {
6490            snprintf(buffer, SIZE, "    input %zu:\n", i);
6491            write(fd, buffer, strlen(buffer));
6492            mInputProfiles[i]->dump(fd);
6493        }
6494    }
6495    if (mDeclaredDevices.size()) {
6496        write(fd, "  - devices:\n", strlen("  - devices:\n"));
6497        for (size_t i = 0; i < mDeclaredDevices.size(); i++) {
6498            mDeclaredDevices[i]->dump(fd, 4, i);
6499        }
6500    }
6501}
6502
6503// --- AudioPort class implementation
6504
6505
6506AudioPolicyManager::AudioPort::AudioPort(const String8& name, audio_port_type_t type,
6507          audio_port_role_t role, const sp<HwModule>& module) :
6508    mName(name), mType(type), mRole(role), mModule(module), mFlags(0)
6509{
6510    mUseInChannelMask = ((type == AUDIO_PORT_TYPE_DEVICE) && (role == AUDIO_PORT_ROLE_SOURCE)) ||
6511                    ((type == AUDIO_PORT_TYPE_MIX) && (role == AUDIO_PORT_ROLE_SINK));
6512}
6513
6514void AudioPolicyManager::AudioPort::toAudioPort(struct audio_port *port) const
6515{
6516    port->role = mRole;
6517    port->type = mType;
6518    unsigned int i;
6519    for (i = 0; i < mSamplingRates.size() && i < AUDIO_PORT_MAX_SAMPLING_RATES; i++) {
6520        if (mSamplingRates[i] != 0) {
6521            port->sample_rates[i] = mSamplingRates[i];
6522        }
6523    }
6524    port->num_sample_rates = i;
6525    for (i = 0; i < mChannelMasks.size() && i < AUDIO_PORT_MAX_CHANNEL_MASKS; i++) {
6526        if (mChannelMasks[i] != 0) {
6527            port->channel_masks[i] = mChannelMasks[i];
6528        }
6529    }
6530    port->num_channel_masks = i;
6531    for (i = 0; i < mFormats.size() && i < AUDIO_PORT_MAX_FORMATS; i++) {
6532        if (mFormats[i] != 0) {
6533            port->formats[i] = mFormats[i];
6534        }
6535    }
6536    port->num_formats = i;
6537
6538    ALOGV("AudioPort::toAudioPort() num gains %zu", mGains.size());
6539
6540    for (i = 0; i < mGains.size() && i < AUDIO_PORT_MAX_GAINS; i++) {
6541        port->gains[i] = mGains[i]->mGain;
6542    }
6543    port->num_gains = i;
6544}
6545
6546void AudioPolicyManager::AudioPort::importAudioPort(const sp<AudioPort> port) {
6547    for (size_t k = 0 ; k < port->mSamplingRates.size() ; k++) {
6548        const uint32_t rate = port->mSamplingRates.itemAt(k);
6549        if (rate != 0) { // skip "dynamic" rates
6550            bool hasRate = false;
6551            for (size_t l = 0 ; l < mSamplingRates.size() ; l++) {
6552                if (rate == mSamplingRates.itemAt(l)) {
6553                    hasRate = true;
6554                    break;
6555                }
6556            }
6557            if (!hasRate) { // never import a sampling rate twice
6558                mSamplingRates.add(rate);
6559            }
6560        }
6561    }
6562    for (size_t k = 0 ; k < port->mChannelMasks.size() ; k++) {
6563        const audio_channel_mask_t mask = port->mChannelMasks.itemAt(k);
6564        if (mask != 0) { // skip "dynamic" masks
6565            bool hasMask = false;
6566            for (size_t l = 0 ; l < mChannelMasks.size() ; l++) {
6567                if (mask == mChannelMasks.itemAt(l)) {
6568                    hasMask = true;
6569                    break;
6570                }
6571            }
6572            if (!hasMask) { // never import a channel mask twice
6573                mChannelMasks.add(mask);
6574            }
6575        }
6576    }
6577    for (size_t k = 0 ; k < port->mFormats.size() ; k++) {
6578        const audio_format_t format = port->mFormats.itemAt(k);
6579        if (format != 0) { // skip "dynamic" formats
6580            bool hasFormat = false;
6581            for (size_t l = 0 ; l < mFormats.size() ; l++) {
6582                if (format == mFormats.itemAt(l)) {
6583                    hasFormat = true;
6584                    break;
6585                }
6586            }
6587            if (!hasFormat) { // never import a channel mask twice
6588                mFormats.add(format);
6589            }
6590        }
6591    }
6592    for (size_t k = 0 ; k < port->mGains.size() ; k++) {
6593        sp<AudioGain> gain = port->mGains.itemAt(k);
6594        if (gain != 0) {
6595            bool hasGain = false;
6596            for (size_t l = 0 ; l < mGains.size() ; l++) {
6597                if (gain == mGains.itemAt(l)) {
6598                    hasGain = true;
6599                    break;
6600                }
6601            }
6602            if (!hasGain) { // never import a gain twice
6603                mGains.add(gain);
6604            }
6605        }
6606    }
6607}
6608
6609void AudioPolicyManager::AudioPort::clearCapabilities() {
6610    mChannelMasks.clear();
6611    mFormats.clear();
6612    mSamplingRates.clear();
6613    mGains.clear();
6614}
6615
6616void AudioPolicyManager::AudioPort::loadSamplingRates(char *name)
6617{
6618    char *str = strtok(name, "|");
6619
6620    // by convention, "0' in the first entry in mSamplingRates indicates the supported sampling
6621    // rates should be read from the output stream after it is opened for the first time
6622    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
6623        mSamplingRates.add(0);
6624        return;
6625    }
6626
6627    while (str != NULL) {
6628        uint32_t rate = atoi(str);
6629        if (rate != 0) {
6630            ALOGV("loadSamplingRates() adding rate %d", rate);
6631            mSamplingRates.add(rate);
6632        }
6633        str = strtok(NULL, "|");
6634    }
6635}
6636
6637void AudioPolicyManager::AudioPort::loadFormats(char *name)
6638{
6639    char *str = strtok(name, "|");
6640
6641    // by convention, "0' in the first entry in mFormats indicates the supported formats
6642    // should be read from the output stream after it is opened for the first time
6643    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
6644        mFormats.add(AUDIO_FORMAT_DEFAULT);
6645        return;
6646    }
6647
6648    while (str != NULL) {
6649        audio_format_t format = (audio_format_t)stringToEnum(sFormatNameToEnumTable,
6650                                                             ARRAY_SIZE(sFormatNameToEnumTable),
6651                                                             str);
6652        if (format != AUDIO_FORMAT_DEFAULT) {
6653            mFormats.add(format);
6654        }
6655        str = strtok(NULL, "|");
6656    }
6657}
6658
6659void AudioPolicyManager::AudioPort::loadInChannels(char *name)
6660{
6661    const char *str = strtok(name, "|");
6662
6663    ALOGV("loadInChannels() %s", name);
6664
6665    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
6666        mChannelMasks.add(0);
6667        return;
6668    }
6669
6670    while (str != NULL) {
6671        audio_channel_mask_t channelMask =
6672                (audio_channel_mask_t)stringToEnum(sInChannelsNameToEnumTable,
6673                                                   ARRAY_SIZE(sInChannelsNameToEnumTable),
6674                                                   str);
6675        if (channelMask != 0) {
6676            ALOGV("loadInChannels() adding channelMask %04x", channelMask);
6677            mChannelMasks.add(channelMask);
6678        }
6679        str = strtok(NULL, "|");
6680    }
6681}
6682
6683void AudioPolicyManager::AudioPort::loadOutChannels(char *name)
6684{
6685    const char *str = strtok(name, "|");
6686
6687    ALOGV("loadOutChannels() %s", name);
6688
6689    // by convention, "0' in the first entry in mChannelMasks indicates the supported channel
6690    // masks should be read from the output stream after it is opened for the first time
6691    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
6692        mChannelMasks.add(0);
6693        return;
6694    }
6695
6696    while (str != NULL) {
6697        audio_channel_mask_t channelMask =
6698                (audio_channel_mask_t)stringToEnum(sOutChannelsNameToEnumTable,
6699                                                   ARRAY_SIZE(sOutChannelsNameToEnumTable),
6700                                                   str);
6701        if (channelMask != 0) {
6702            mChannelMasks.add(channelMask);
6703        }
6704        str = strtok(NULL, "|");
6705    }
6706    return;
6707}
6708
6709audio_gain_mode_t AudioPolicyManager::AudioPort::loadGainMode(char *name)
6710{
6711    const char *str = strtok(name, "|");
6712
6713    ALOGV("loadGainMode() %s", name);
6714    audio_gain_mode_t mode = 0;
6715    while (str != NULL) {
6716        mode |= (audio_gain_mode_t)stringToEnum(sGainModeNameToEnumTable,
6717                                                ARRAY_SIZE(sGainModeNameToEnumTable),
6718                                                str);
6719        str = strtok(NULL, "|");
6720    }
6721    return mode;
6722}
6723
6724void AudioPolicyManager::AudioPort::loadGain(cnode *root, int index)
6725{
6726    cnode *node = root->first_child;
6727
6728    sp<AudioGain> gain = new AudioGain(index, mUseInChannelMask);
6729
6730    while (node) {
6731        if (strcmp(node->name, GAIN_MODE) == 0) {
6732            gain->mGain.mode = loadGainMode((char *)node->value);
6733        } else if (strcmp(node->name, GAIN_CHANNELS) == 0) {
6734            if (mUseInChannelMask) {
6735                gain->mGain.channel_mask =
6736                        (audio_channel_mask_t)stringToEnum(sInChannelsNameToEnumTable,
6737                                                           ARRAY_SIZE(sInChannelsNameToEnumTable),
6738                                                           (char *)node->value);
6739            } else {
6740                gain->mGain.channel_mask =
6741                        (audio_channel_mask_t)stringToEnum(sOutChannelsNameToEnumTable,
6742                                                           ARRAY_SIZE(sOutChannelsNameToEnumTable),
6743                                                           (char *)node->value);
6744            }
6745        } else if (strcmp(node->name, GAIN_MIN_VALUE) == 0) {
6746            gain->mGain.min_value = atoi((char *)node->value);
6747        } else if (strcmp(node->name, GAIN_MAX_VALUE) == 0) {
6748            gain->mGain.max_value = atoi((char *)node->value);
6749        } else if (strcmp(node->name, GAIN_DEFAULT_VALUE) == 0) {
6750            gain->mGain.default_value = atoi((char *)node->value);
6751        } else if (strcmp(node->name, GAIN_STEP_VALUE) == 0) {
6752            gain->mGain.step_value = atoi((char *)node->value);
6753        } else if (strcmp(node->name, GAIN_MIN_RAMP_MS) == 0) {
6754            gain->mGain.min_ramp_ms = atoi((char *)node->value);
6755        } else if (strcmp(node->name, GAIN_MAX_RAMP_MS) == 0) {
6756            gain->mGain.max_ramp_ms = atoi((char *)node->value);
6757        }
6758        node = node->next;
6759    }
6760
6761    ALOGV("loadGain() adding new gain mode %08x channel mask %08x min mB %d max mB %d",
6762          gain->mGain.mode, gain->mGain.channel_mask, gain->mGain.min_value, gain->mGain.max_value);
6763
6764    if (gain->mGain.mode == 0) {
6765        return;
6766    }
6767    mGains.add(gain);
6768}
6769
6770void AudioPolicyManager::AudioPort::loadGains(cnode *root)
6771{
6772    cnode *node = root->first_child;
6773    int index = 0;
6774    while (node) {
6775        ALOGV("loadGains() loading gain %s", node->name);
6776        loadGain(node, index++);
6777        node = node->next;
6778    }
6779}
6780
6781status_t AudioPolicyManager::AudioPort::checkExactSamplingRate(uint32_t samplingRate) const
6782{
6783    if (mSamplingRates.isEmpty()) {
6784        return NO_ERROR;
6785    }
6786
6787    for (size_t i = 0; i < mSamplingRates.size(); i ++) {
6788        if (mSamplingRates[i] == samplingRate) {
6789            return NO_ERROR;
6790        }
6791    }
6792    return BAD_VALUE;
6793}
6794
6795status_t AudioPolicyManager::AudioPort::checkCompatibleSamplingRate(uint32_t samplingRate,
6796        uint32_t *updatedSamplingRate) const
6797{
6798    if (mSamplingRates.isEmpty()) {
6799        return NO_ERROR;
6800    }
6801
6802    // Search for the closest supported sampling rate that is above (preferred)
6803    // or below (acceptable) the desired sampling rate, within a permitted ratio.
6804    // The sampling rates do not need to be sorted in ascending order.
6805    ssize_t maxBelow = -1;
6806    ssize_t minAbove = -1;
6807    uint32_t candidate;
6808    for (size_t i = 0; i < mSamplingRates.size(); i++) {
6809        candidate = mSamplingRates[i];
6810        if (candidate == samplingRate) {
6811            if (updatedSamplingRate != NULL) {
6812                *updatedSamplingRate = candidate;
6813            }
6814            return NO_ERROR;
6815        }
6816        // candidate < desired
6817        if (candidate < samplingRate) {
6818            if (maxBelow < 0 || candidate > mSamplingRates[maxBelow]) {
6819                maxBelow = i;
6820            }
6821        // candidate > desired
6822        } else {
6823            if (minAbove < 0 || candidate < mSamplingRates[minAbove]) {
6824                minAbove = i;
6825            }
6826        }
6827    }
6828    // This uses hard-coded knowledge about AudioFlinger resampling ratios.
6829    // TODO Move these assumptions out.
6830    static const uint32_t kMaxDownSampleRatio = 6;  // beyond this aliasing occurs
6831    static const uint32_t kMaxUpSampleRatio = 256;  // beyond this sample rate inaccuracies occur
6832                                                    // due to approximation by an int32_t of the
6833                                                    // phase increments
6834    // Prefer to down-sample from a higher sampling rate, as we get the desired frequency spectrum.
6835    if (minAbove >= 0) {
6836        candidate = mSamplingRates[minAbove];
6837        if (candidate / kMaxDownSampleRatio <= samplingRate) {
6838            if (updatedSamplingRate != NULL) {
6839                *updatedSamplingRate = candidate;
6840            }
6841            return NO_ERROR;
6842        }
6843    }
6844    // But if we have to up-sample from a lower sampling rate, that's OK.
6845    if (maxBelow >= 0) {
6846        candidate = mSamplingRates[maxBelow];
6847        if (candidate * kMaxUpSampleRatio >= samplingRate) {
6848            if (updatedSamplingRate != NULL) {
6849                *updatedSamplingRate = candidate;
6850            }
6851            return NO_ERROR;
6852        }
6853    }
6854    // leave updatedSamplingRate unmodified
6855    return BAD_VALUE;
6856}
6857
6858status_t AudioPolicyManager::AudioPort::checkExactChannelMask(audio_channel_mask_t channelMask) const
6859{
6860    if (mChannelMasks.isEmpty()) {
6861        return NO_ERROR;
6862    }
6863
6864    for (size_t i = 0; i < mChannelMasks.size(); i++) {
6865        if (mChannelMasks[i] == channelMask) {
6866            return NO_ERROR;
6867        }
6868    }
6869    return BAD_VALUE;
6870}
6871
6872status_t AudioPolicyManager::AudioPort::checkCompatibleChannelMask(audio_channel_mask_t channelMask)
6873        const
6874{
6875    if (mChannelMasks.isEmpty()) {
6876        return NO_ERROR;
6877    }
6878
6879    const bool isRecordThread = mType == AUDIO_PORT_TYPE_MIX && mRole == AUDIO_PORT_ROLE_SINK;
6880    for (size_t i = 0; i < mChannelMasks.size(); i ++) {
6881        // FIXME Does not handle multi-channel automatic conversions yet
6882        audio_channel_mask_t supported = mChannelMasks[i];
6883        if (supported == channelMask) {
6884            return NO_ERROR;
6885        }
6886        if (isRecordThread) {
6887            // This uses hard-coded knowledge that AudioFlinger can silently down-mix and up-mix.
6888            // FIXME Abstract this out to a table.
6889            if (((supported == AUDIO_CHANNEL_IN_FRONT_BACK || supported == AUDIO_CHANNEL_IN_STEREO)
6890                    && channelMask == AUDIO_CHANNEL_IN_MONO) ||
6891                (supported == AUDIO_CHANNEL_IN_MONO && (channelMask == AUDIO_CHANNEL_IN_FRONT_BACK
6892                    || channelMask == AUDIO_CHANNEL_IN_STEREO))) {
6893                return NO_ERROR;
6894            }
6895        }
6896    }
6897    return BAD_VALUE;
6898}
6899
6900status_t AudioPolicyManager::AudioPort::checkFormat(audio_format_t format) const
6901{
6902    if (mFormats.isEmpty()) {
6903        return NO_ERROR;
6904    }
6905
6906    for (size_t i = 0; i < mFormats.size(); i ++) {
6907        if (mFormats[i] == format) {
6908            return NO_ERROR;
6909        }
6910    }
6911    return BAD_VALUE;
6912}
6913
6914
6915uint32_t AudioPolicyManager::AudioPort::pickSamplingRate() const
6916{
6917    // special case for uninitialized dynamic profile
6918    if (mSamplingRates.size() == 1 && mSamplingRates[0] == 0) {
6919        return 0;
6920    }
6921
6922    // For direct outputs, pick minimum sampling rate: this helps ensuring that the
6923    // channel count / sampling rate combination chosen will be supported by the connected
6924    // sink
6925    if ((mType == AUDIO_PORT_TYPE_MIX) && (mRole == AUDIO_PORT_ROLE_SOURCE) &&
6926            (mFlags & (AUDIO_OUTPUT_FLAG_DIRECT | AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD))) {
6927        uint32_t samplingRate = UINT_MAX;
6928        for (size_t i = 0; i < mSamplingRates.size(); i ++) {
6929            if ((mSamplingRates[i] < samplingRate) && (mSamplingRates[i] > 0)) {
6930                samplingRate = mSamplingRates[i];
6931            }
6932        }
6933        return (samplingRate == UINT_MAX) ? 0 : samplingRate;
6934    }
6935
6936    uint32_t samplingRate = 0;
6937    uint32_t maxRate = MAX_MIXER_SAMPLING_RATE;
6938
6939    // For mixed output and inputs, use max mixer sampling rates. Do not
6940    // limit sampling rate otherwise
6941    if (mType != AUDIO_PORT_TYPE_MIX) {
6942        maxRate = UINT_MAX;
6943    }
6944    for (size_t i = 0; i < mSamplingRates.size(); i ++) {
6945        if ((mSamplingRates[i] > samplingRate) && (mSamplingRates[i] <= maxRate)) {
6946            samplingRate = mSamplingRates[i];
6947        }
6948    }
6949    return samplingRate;
6950}
6951
6952audio_channel_mask_t AudioPolicyManager::AudioPort::pickChannelMask() const
6953{
6954    // special case for uninitialized dynamic profile
6955    if (mChannelMasks.size() == 1 && mChannelMasks[0] == 0) {
6956        return AUDIO_CHANNEL_NONE;
6957    }
6958    audio_channel_mask_t channelMask = AUDIO_CHANNEL_NONE;
6959
6960    // For direct outputs, pick minimum channel count: this helps ensuring that the
6961    // channel count / sampling rate combination chosen will be supported by the connected
6962    // sink
6963    if ((mType == AUDIO_PORT_TYPE_MIX) && (mRole == AUDIO_PORT_ROLE_SOURCE) &&
6964            (mFlags & (AUDIO_OUTPUT_FLAG_DIRECT | AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD))) {
6965        uint32_t channelCount = UINT_MAX;
6966        for (size_t i = 0; i < mChannelMasks.size(); i ++) {
6967            uint32_t cnlCount;
6968            if (mUseInChannelMask) {
6969                cnlCount = audio_channel_count_from_in_mask(mChannelMasks[i]);
6970            } else {
6971                cnlCount = audio_channel_count_from_out_mask(mChannelMasks[i]);
6972            }
6973            if ((cnlCount < channelCount) && (cnlCount > 0)) {
6974                channelMask = mChannelMasks[i];
6975                channelCount = cnlCount;
6976            }
6977        }
6978        return channelMask;
6979    }
6980
6981    uint32_t channelCount = 0;
6982    uint32_t maxCount = MAX_MIXER_CHANNEL_COUNT;
6983
6984    // For mixed output and inputs, use max mixer channel count. Do not
6985    // limit channel count otherwise
6986    if (mType != AUDIO_PORT_TYPE_MIX) {
6987        maxCount = UINT_MAX;
6988    }
6989    for (size_t i = 0; i < mChannelMasks.size(); i ++) {
6990        uint32_t cnlCount;
6991        if (mUseInChannelMask) {
6992            cnlCount = audio_channel_count_from_in_mask(mChannelMasks[i]);
6993        } else {
6994            cnlCount = audio_channel_count_from_out_mask(mChannelMasks[i]);
6995        }
6996        if ((cnlCount > channelCount) && (cnlCount <= maxCount)) {
6997            channelMask = mChannelMasks[i];
6998            channelCount = cnlCount;
6999        }
7000    }
7001    return channelMask;
7002}
7003
7004/* format in order of increasing preference */
7005const audio_format_t AudioPolicyManager::AudioPort::sPcmFormatCompareTable[] = {
7006        AUDIO_FORMAT_DEFAULT,
7007        AUDIO_FORMAT_PCM_16_BIT,
7008        AUDIO_FORMAT_PCM_8_24_BIT,
7009        AUDIO_FORMAT_PCM_24_BIT_PACKED,
7010        AUDIO_FORMAT_PCM_32_BIT,
7011        AUDIO_FORMAT_PCM_FLOAT,
7012};
7013
7014int AudioPolicyManager::AudioPort::compareFormats(audio_format_t format1,
7015                                                  audio_format_t format2)
7016{
7017    // NOTE: AUDIO_FORMAT_INVALID is also considered not PCM and will be compared equal to any
7018    // compressed format and better than any PCM format. This is by design of pickFormat()
7019    if (!audio_is_linear_pcm(format1)) {
7020        if (!audio_is_linear_pcm(format2)) {
7021            return 0;
7022        }
7023        return 1;
7024    }
7025    if (!audio_is_linear_pcm(format2)) {
7026        return -1;
7027    }
7028
7029    int index1 = -1, index2 = -1;
7030    for (size_t i = 0;
7031            (i < ARRAY_SIZE(sPcmFormatCompareTable)) && ((index1 == -1) || (index2 == -1));
7032            i ++) {
7033        if (sPcmFormatCompareTable[i] == format1) {
7034            index1 = i;
7035        }
7036        if (sPcmFormatCompareTable[i] == format2) {
7037            index2 = i;
7038        }
7039    }
7040    // format1 not found => index1 < 0 => format2 > format1
7041    // format2 not found => index2 < 0 => format2 < format1
7042    return index1 - index2;
7043}
7044
7045audio_format_t AudioPolicyManager::AudioPort::pickFormat() const
7046{
7047    // special case for uninitialized dynamic profile
7048    if (mFormats.size() == 1 && mFormats[0] == 0) {
7049        return AUDIO_FORMAT_DEFAULT;
7050    }
7051
7052    audio_format_t format = AUDIO_FORMAT_DEFAULT;
7053    audio_format_t bestFormat =
7054            AudioPolicyManager::AudioPort::sPcmFormatCompareTable[
7055                ARRAY_SIZE(AudioPolicyManager::AudioPort::sPcmFormatCompareTable) - 1];
7056    // For mixed output and inputs, use best mixer output format. Do not
7057    // limit format otherwise
7058    if ((mType != AUDIO_PORT_TYPE_MIX) ||
7059            ((mRole == AUDIO_PORT_ROLE_SOURCE) &&
7060             (((mFlags & (AUDIO_OUTPUT_FLAG_DIRECT | AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD)) != 0)))) {
7061        bestFormat = AUDIO_FORMAT_INVALID;
7062    }
7063
7064    for (size_t i = 0; i < mFormats.size(); i ++) {
7065        if ((compareFormats(mFormats[i], format) > 0) &&
7066                (compareFormats(mFormats[i], bestFormat) <= 0)) {
7067            format = mFormats[i];
7068        }
7069    }
7070    return format;
7071}
7072
7073status_t AudioPolicyManager::AudioPort::checkGain(const struct audio_gain_config *gainConfig,
7074                                                  int index) const
7075{
7076    if (index < 0 || (size_t)index >= mGains.size()) {
7077        return BAD_VALUE;
7078    }
7079    return mGains[index]->checkConfig(gainConfig);
7080}
7081
7082void AudioPolicyManager::AudioPort::dump(int fd, int spaces) const
7083{
7084    const size_t SIZE = 256;
7085    char buffer[SIZE];
7086    String8 result;
7087
7088    if (mName.size() != 0) {
7089        snprintf(buffer, SIZE, "%*s- name: %s\n", spaces, "", mName.string());
7090        result.append(buffer);
7091    }
7092
7093    if (mSamplingRates.size() != 0) {
7094        snprintf(buffer, SIZE, "%*s- sampling rates: ", spaces, "");
7095        result.append(buffer);
7096        for (size_t i = 0; i < mSamplingRates.size(); i++) {
7097            if (i == 0 && mSamplingRates[i] == 0) {
7098                snprintf(buffer, SIZE, "Dynamic");
7099            } else {
7100                snprintf(buffer, SIZE, "%d", mSamplingRates[i]);
7101            }
7102            result.append(buffer);
7103            result.append(i == (mSamplingRates.size() - 1) ? "" : ", ");
7104        }
7105        result.append("\n");
7106    }
7107
7108    if (mChannelMasks.size() != 0) {
7109        snprintf(buffer, SIZE, "%*s- channel masks: ", spaces, "");
7110        result.append(buffer);
7111        for (size_t i = 0; i < mChannelMasks.size(); i++) {
7112            ALOGV("AudioPort::dump mChannelMasks %zu %08x", i, mChannelMasks[i]);
7113
7114            if (i == 0 && mChannelMasks[i] == 0) {
7115                snprintf(buffer, SIZE, "Dynamic");
7116            } else {
7117                snprintf(buffer, SIZE, "0x%04x", mChannelMasks[i]);
7118            }
7119            result.append(buffer);
7120            result.append(i == (mChannelMasks.size() - 1) ? "" : ", ");
7121        }
7122        result.append("\n");
7123    }
7124
7125    if (mFormats.size() != 0) {
7126        snprintf(buffer, SIZE, "%*s- formats: ", spaces, "");
7127        result.append(buffer);
7128        for (size_t i = 0; i < mFormats.size(); i++) {
7129            const char *formatStr = enumToString(sFormatNameToEnumTable,
7130                                                 ARRAY_SIZE(sFormatNameToEnumTable),
7131                                                 mFormats[i]);
7132            if (i == 0 && strcmp(formatStr, "") == 0) {
7133                snprintf(buffer, SIZE, "Dynamic");
7134            } else {
7135                snprintf(buffer, SIZE, "%s", formatStr);
7136            }
7137            result.append(buffer);
7138            result.append(i == (mFormats.size() - 1) ? "" : ", ");
7139        }
7140        result.append("\n");
7141    }
7142    write(fd, result.string(), result.size());
7143    if (mGains.size() != 0) {
7144        snprintf(buffer, SIZE, "%*s- gains:\n", spaces, "");
7145        write(fd, buffer, strlen(buffer) + 1);
7146        result.append(buffer);
7147        for (size_t i = 0; i < mGains.size(); i++) {
7148            mGains[i]->dump(fd, spaces + 2, i);
7149        }
7150    }
7151}
7152
7153// --- AudioGain class implementation
7154
7155AudioPolicyManager::AudioGain::AudioGain(int index, bool useInChannelMask)
7156{
7157    mIndex = index;
7158    mUseInChannelMask = useInChannelMask;
7159    memset(&mGain, 0, sizeof(struct audio_gain));
7160}
7161
7162void AudioPolicyManager::AudioGain::getDefaultConfig(struct audio_gain_config *config)
7163{
7164    config->index = mIndex;
7165    config->mode = mGain.mode;
7166    config->channel_mask = mGain.channel_mask;
7167    if ((mGain.mode & AUDIO_GAIN_MODE_JOINT) == AUDIO_GAIN_MODE_JOINT) {
7168        config->values[0] = mGain.default_value;
7169    } else {
7170        uint32_t numValues;
7171        if (mUseInChannelMask) {
7172            numValues = audio_channel_count_from_in_mask(mGain.channel_mask);
7173        } else {
7174            numValues = audio_channel_count_from_out_mask(mGain.channel_mask);
7175        }
7176        for (size_t i = 0; i < numValues; i++) {
7177            config->values[i] = mGain.default_value;
7178        }
7179    }
7180    if ((mGain.mode & AUDIO_GAIN_MODE_RAMP) == AUDIO_GAIN_MODE_RAMP) {
7181        config->ramp_duration_ms = mGain.min_ramp_ms;
7182    }
7183}
7184
7185status_t AudioPolicyManager::AudioGain::checkConfig(const struct audio_gain_config *config)
7186{
7187    if ((config->mode & ~mGain.mode) != 0) {
7188        return BAD_VALUE;
7189    }
7190    if ((config->mode & AUDIO_GAIN_MODE_JOINT) == AUDIO_GAIN_MODE_JOINT) {
7191        if ((config->values[0] < mGain.min_value) ||
7192                    (config->values[0] > mGain.max_value)) {
7193            return BAD_VALUE;
7194        }
7195    } else {
7196        if ((config->channel_mask & ~mGain.channel_mask) != 0) {
7197            return BAD_VALUE;
7198        }
7199        uint32_t numValues;
7200        if (mUseInChannelMask) {
7201            numValues = audio_channel_count_from_in_mask(config->channel_mask);
7202        } else {
7203            numValues = audio_channel_count_from_out_mask(config->channel_mask);
7204        }
7205        for (size_t i = 0; i < numValues; i++) {
7206            if ((config->values[i] < mGain.min_value) ||
7207                    (config->values[i] > mGain.max_value)) {
7208                return BAD_VALUE;
7209            }
7210        }
7211    }
7212    if ((config->mode & AUDIO_GAIN_MODE_RAMP) == AUDIO_GAIN_MODE_RAMP) {
7213        if ((config->ramp_duration_ms < mGain.min_ramp_ms) ||
7214                    (config->ramp_duration_ms > mGain.max_ramp_ms)) {
7215            return BAD_VALUE;
7216        }
7217    }
7218    return NO_ERROR;
7219}
7220
7221void AudioPolicyManager::AudioGain::dump(int fd, int spaces, int index) const
7222{
7223    const size_t SIZE = 256;
7224    char buffer[SIZE];
7225    String8 result;
7226
7227    snprintf(buffer, SIZE, "%*sGain %d:\n", spaces, "", index+1);
7228    result.append(buffer);
7229    snprintf(buffer, SIZE, "%*s- mode: %08x\n", spaces, "", mGain.mode);
7230    result.append(buffer);
7231    snprintf(buffer, SIZE, "%*s- channel_mask: %08x\n", spaces, "", mGain.channel_mask);
7232    result.append(buffer);
7233    snprintf(buffer, SIZE, "%*s- min_value: %d mB\n", spaces, "", mGain.min_value);
7234    result.append(buffer);
7235    snprintf(buffer, SIZE, "%*s- max_value: %d mB\n", spaces, "", mGain.max_value);
7236    result.append(buffer);
7237    snprintf(buffer, SIZE, "%*s- default_value: %d mB\n", spaces, "", mGain.default_value);
7238    result.append(buffer);
7239    snprintf(buffer, SIZE, "%*s- step_value: %d mB\n", spaces, "", mGain.step_value);
7240    result.append(buffer);
7241    snprintf(buffer, SIZE, "%*s- min_ramp_ms: %d ms\n", spaces, "", mGain.min_ramp_ms);
7242    result.append(buffer);
7243    snprintf(buffer, SIZE, "%*s- max_ramp_ms: %d ms\n", spaces, "", mGain.max_ramp_ms);
7244    result.append(buffer);
7245
7246    write(fd, result.string(), result.size());
7247}
7248
7249// --- AudioPortConfig class implementation
7250
7251AudioPolicyManager::AudioPortConfig::AudioPortConfig()
7252{
7253    mSamplingRate = 0;
7254    mChannelMask = AUDIO_CHANNEL_NONE;
7255    mFormat = AUDIO_FORMAT_INVALID;
7256    mGain.index = -1;
7257}
7258
7259status_t AudioPolicyManager::AudioPortConfig::applyAudioPortConfig(
7260                                                        const struct audio_port_config *config,
7261                                                        struct audio_port_config *backupConfig)
7262{
7263    struct audio_port_config localBackupConfig;
7264    status_t status = NO_ERROR;
7265
7266    localBackupConfig.config_mask = config->config_mask;
7267    toAudioPortConfig(&localBackupConfig);
7268
7269    sp<AudioPort> audioport = getAudioPort();
7270    if (audioport == 0) {
7271        status = NO_INIT;
7272        goto exit;
7273    }
7274    if (config->config_mask & AUDIO_PORT_CONFIG_SAMPLE_RATE) {
7275        status = audioport->checkExactSamplingRate(config->sample_rate);
7276        if (status != NO_ERROR) {
7277            goto exit;
7278        }
7279        mSamplingRate = config->sample_rate;
7280    }
7281    if (config->config_mask & AUDIO_PORT_CONFIG_CHANNEL_MASK) {
7282        status = audioport->checkExactChannelMask(config->channel_mask);
7283        if (status != NO_ERROR) {
7284            goto exit;
7285        }
7286        mChannelMask = config->channel_mask;
7287    }
7288    if (config->config_mask & AUDIO_PORT_CONFIG_FORMAT) {
7289        status = audioport->checkFormat(config->format);
7290        if (status != NO_ERROR) {
7291            goto exit;
7292        }
7293        mFormat = config->format;
7294    }
7295    if (config->config_mask & AUDIO_PORT_CONFIG_GAIN) {
7296        status = audioport->checkGain(&config->gain, config->gain.index);
7297        if (status != NO_ERROR) {
7298            goto exit;
7299        }
7300        mGain = config->gain;
7301    }
7302
7303exit:
7304    if (status != NO_ERROR) {
7305        applyAudioPortConfig(&localBackupConfig);
7306    }
7307    if (backupConfig != NULL) {
7308        *backupConfig = localBackupConfig;
7309    }
7310    return status;
7311}
7312
7313void AudioPolicyManager::AudioPortConfig::toAudioPortConfig(
7314                                                    struct audio_port_config *dstConfig,
7315                                                    const struct audio_port_config *srcConfig) const
7316{
7317    if (dstConfig->config_mask & AUDIO_PORT_CONFIG_SAMPLE_RATE) {
7318        dstConfig->sample_rate = mSamplingRate;
7319        if ((srcConfig != NULL) && (srcConfig->config_mask & AUDIO_PORT_CONFIG_SAMPLE_RATE)) {
7320            dstConfig->sample_rate = srcConfig->sample_rate;
7321        }
7322    } else {
7323        dstConfig->sample_rate = 0;
7324    }
7325    if (dstConfig->config_mask & AUDIO_PORT_CONFIG_CHANNEL_MASK) {
7326        dstConfig->channel_mask = mChannelMask;
7327        if ((srcConfig != NULL) && (srcConfig->config_mask & AUDIO_PORT_CONFIG_CHANNEL_MASK)) {
7328            dstConfig->channel_mask = srcConfig->channel_mask;
7329        }
7330    } else {
7331        dstConfig->channel_mask = AUDIO_CHANNEL_NONE;
7332    }
7333    if (dstConfig->config_mask & AUDIO_PORT_CONFIG_FORMAT) {
7334        dstConfig->format = mFormat;
7335        if ((srcConfig != NULL) && (srcConfig->config_mask & AUDIO_PORT_CONFIG_FORMAT)) {
7336            dstConfig->format = srcConfig->format;
7337        }
7338    } else {
7339        dstConfig->format = AUDIO_FORMAT_INVALID;
7340    }
7341    if (dstConfig->config_mask & AUDIO_PORT_CONFIG_GAIN) {
7342        dstConfig->gain = mGain;
7343        if ((srcConfig != NULL) && (srcConfig->config_mask & AUDIO_PORT_CONFIG_GAIN)) {
7344            dstConfig->gain = srcConfig->gain;
7345        }
7346    } else {
7347        dstConfig->gain.index = -1;
7348    }
7349    if (dstConfig->gain.index != -1) {
7350        dstConfig->config_mask |= AUDIO_PORT_CONFIG_GAIN;
7351    } else {
7352        dstConfig->config_mask &= ~AUDIO_PORT_CONFIG_GAIN;
7353    }
7354}
7355
7356// --- IOProfile class implementation
7357
7358AudioPolicyManager::IOProfile::IOProfile(const String8& name, audio_port_role_t role,
7359                                         const sp<HwModule>& module)
7360    : AudioPort(name, AUDIO_PORT_TYPE_MIX, role, module)
7361{
7362}
7363
7364AudioPolicyManager::IOProfile::~IOProfile()
7365{
7366}
7367
7368// checks if the IO profile is compatible with specified parameters.
7369// Sampling rate, format and channel mask must be specified in order to
7370// get a valid a match
7371bool AudioPolicyManager::IOProfile::isCompatibleProfile(audio_devices_t device,
7372                                                        String8 address,
7373                                                        uint32_t samplingRate,
7374                                                        uint32_t *updatedSamplingRate,
7375                                                        audio_format_t format,
7376                                                        audio_channel_mask_t channelMask,
7377                                                        uint32_t flags) const
7378{
7379    const bool isPlaybackThread = mType == AUDIO_PORT_TYPE_MIX && mRole == AUDIO_PORT_ROLE_SOURCE;
7380    const bool isRecordThread = mType == AUDIO_PORT_TYPE_MIX && mRole == AUDIO_PORT_ROLE_SINK;
7381    ALOG_ASSERT(isPlaybackThread != isRecordThread);
7382
7383    if (device != AUDIO_DEVICE_NONE && mSupportedDevices.getDevice(device, address) == 0) {
7384        return false;
7385    }
7386
7387    if (samplingRate == 0) {
7388         return false;
7389    }
7390    uint32_t myUpdatedSamplingRate = samplingRate;
7391    if (isPlaybackThread && checkExactSamplingRate(samplingRate) != NO_ERROR) {
7392         return false;
7393    }
7394    if (isRecordThread && checkCompatibleSamplingRate(samplingRate, &myUpdatedSamplingRate) !=
7395            NO_ERROR) {
7396         return false;
7397    }
7398
7399    if (!audio_is_valid_format(format) || checkFormat(format) != NO_ERROR) {
7400        return false;
7401    }
7402
7403    if (isPlaybackThread && (!audio_is_output_channel(channelMask) ||
7404            checkExactChannelMask(channelMask) != NO_ERROR)) {
7405        return false;
7406    }
7407    if (isRecordThread && (!audio_is_input_channel(channelMask) ||
7408            checkCompatibleChannelMask(channelMask) != NO_ERROR)) {
7409        return false;
7410    }
7411
7412    if (isPlaybackThread && (mFlags & flags) != flags) {
7413        return false;
7414    }
7415    // The only input flag that is allowed to be different is the fast flag.
7416    // An existing fast stream is compatible with a normal track request.
7417    // An existing normal stream is compatible with a fast track request,
7418    // but the fast request will be denied by AudioFlinger and converted to normal track.
7419    if (isRecordThread && ((mFlags ^ flags) &
7420            ~AUDIO_INPUT_FLAG_FAST)) {
7421        return false;
7422    }
7423
7424    if (updatedSamplingRate != NULL) {
7425        *updatedSamplingRate = myUpdatedSamplingRate;
7426    }
7427    return true;
7428}
7429
7430void AudioPolicyManager::IOProfile::dump(int fd)
7431{
7432    const size_t SIZE = 256;
7433    char buffer[SIZE];
7434    String8 result;
7435
7436    AudioPort::dump(fd, 4);
7437
7438    snprintf(buffer, SIZE, "    - flags: 0x%04x\n", mFlags);
7439    result.append(buffer);
7440    snprintf(buffer, SIZE, "    - devices:\n");
7441    result.append(buffer);
7442    write(fd, result.string(), result.size());
7443    for (size_t i = 0; i < mSupportedDevices.size(); i++) {
7444        mSupportedDevices[i]->dump(fd, 6, i);
7445    }
7446}
7447
7448void AudioPolicyManager::IOProfile::log()
7449{
7450    const size_t SIZE = 256;
7451    char buffer[SIZE];
7452    String8 result;
7453
7454    ALOGV("    - sampling rates: ");
7455    for (size_t i = 0; i < mSamplingRates.size(); i++) {
7456        ALOGV("  %d", mSamplingRates[i]);
7457    }
7458
7459    ALOGV("    - channel masks: ");
7460    for (size_t i = 0; i < mChannelMasks.size(); i++) {
7461        ALOGV("  0x%04x", mChannelMasks[i]);
7462    }
7463
7464    ALOGV("    - formats: ");
7465    for (size_t i = 0; i < mFormats.size(); i++) {
7466        ALOGV("  0x%08x", mFormats[i]);
7467    }
7468
7469    ALOGV("    - devices: 0x%04x\n", mSupportedDevices.types());
7470    ALOGV("    - flags: 0x%04x\n", mFlags);
7471}
7472
7473
7474// --- DeviceDescriptor implementation
7475
7476
7477AudioPolicyManager::DeviceDescriptor::DeviceDescriptor(const String8& name, audio_devices_t type) :
7478                     AudioPort(name, AUDIO_PORT_TYPE_DEVICE,
7479                               audio_is_output_device(type) ? AUDIO_PORT_ROLE_SINK :
7480                                                              AUDIO_PORT_ROLE_SOURCE,
7481                             NULL),
7482                     mDeviceType(type), mAddress(""), mId(0)
7483{
7484}
7485
7486bool AudioPolicyManager::DeviceDescriptor::equals(const sp<DeviceDescriptor>& other) const
7487{
7488    // Devices are considered equal if they:
7489    // - are of the same type (a device type cannot be AUDIO_DEVICE_NONE)
7490    // - have the same address or one device does not specify the address
7491    // - have the same channel mask or one device does not specify the channel mask
7492    return (mDeviceType == other->mDeviceType) &&
7493           (mAddress == "" || other->mAddress == "" || mAddress == other->mAddress) &&
7494           (mChannelMask == 0 || other->mChannelMask == 0 ||
7495                mChannelMask == other->mChannelMask);
7496}
7497
7498void AudioPolicyManager::DeviceDescriptor::loadGains(cnode *root)
7499{
7500    AudioPort::loadGains(root);
7501    if (mGains.size() > 0) {
7502        mGains[0]->getDefaultConfig(&mGain);
7503    }
7504}
7505
7506
7507void AudioPolicyManager::DeviceVector::refreshTypes()
7508{
7509    mDeviceTypes = AUDIO_DEVICE_NONE;
7510    for(size_t i = 0; i < size(); i++) {
7511        mDeviceTypes |= itemAt(i)->mDeviceType;
7512    }
7513    ALOGV("DeviceVector::refreshTypes() mDeviceTypes %08x", mDeviceTypes);
7514}
7515
7516ssize_t AudioPolicyManager::DeviceVector::indexOf(const sp<DeviceDescriptor>& item) const
7517{
7518    for(size_t i = 0; i < size(); i++) {
7519        if (item->equals(itemAt(i))) {
7520            return i;
7521        }
7522    }
7523    return -1;
7524}
7525
7526ssize_t AudioPolicyManager::DeviceVector::add(const sp<DeviceDescriptor>& item)
7527{
7528    ssize_t ret = indexOf(item);
7529
7530    if (ret < 0) {
7531        ret = SortedVector::add(item);
7532        if (ret >= 0) {
7533            refreshTypes();
7534        }
7535    } else {
7536        ALOGW("DeviceVector::add device %08x already in", item->mDeviceType);
7537        ret = -1;
7538    }
7539    return ret;
7540}
7541
7542ssize_t AudioPolicyManager::DeviceVector::remove(const sp<DeviceDescriptor>& item)
7543{
7544    size_t i;
7545    ssize_t ret = indexOf(item);
7546
7547    if (ret < 0) {
7548        ALOGW("DeviceVector::remove device %08x not in", item->mDeviceType);
7549    } else {
7550        ret = SortedVector::removeAt(ret);
7551        if (ret >= 0) {
7552            refreshTypes();
7553        }
7554    }
7555    return ret;
7556}
7557
7558void AudioPolicyManager::DeviceVector::loadDevicesFromType(audio_devices_t types)
7559{
7560    DeviceVector deviceList;
7561
7562    uint32_t role_bit = AUDIO_DEVICE_BIT_IN & types;
7563    types &= ~role_bit;
7564
7565    while (types) {
7566        uint32_t i = 31 - __builtin_clz(types);
7567        uint32_t type = 1 << i;
7568        types &= ~type;
7569        add(new DeviceDescriptor(String8(""), type | role_bit));
7570    }
7571}
7572
7573void AudioPolicyManager::DeviceVector::loadDevicesFromName(char *name,
7574                                                           const DeviceVector& declaredDevices)
7575{
7576    char *devName = strtok(name, "|");
7577    while (devName != NULL) {
7578        if (strlen(devName) != 0) {
7579            audio_devices_t type = stringToEnum(sDeviceNameToEnumTable,
7580                                 ARRAY_SIZE(sDeviceNameToEnumTable),
7581                                 devName);
7582            if (type != AUDIO_DEVICE_NONE) {
7583                sp<DeviceDescriptor> dev = new DeviceDescriptor(String8(""), type);
7584                if (type == AUDIO_DEVICE_IN_REMOTE_SUBMIX ||
7585                        type == AUDIO_DEVICE_OUT_REMOTE_SUBMIX ) {
7586                    dev->mAddress = String8("0");
7587                }
7588                add(dev);
7589            } else {
7590                sp<DeviceDescriptor> deviceDesc =
7591                        declaredDevices.getDeviceFromName(String8(devName));
7592                if (deviceDesc != 0) {
7593                    add(deviceDesc);
7594                }
7595            }
7596         }
7597         devName = strtok(NULL, "|");
7598     }
7599}
7600
7601sp<AudioPolicyManager::DeviceDescriptor> AudioPolicyManager::DeviceVector::getDevice(
7602                                                        audio_devices_t type, String8 address) const
7603{
7604    sp<DeviceDescriptor> device;
7605    for (size_t i = 0; i < size(); i++) {
7606        if (itemAt(i)->mDeviceType == type) {
7607            if (address == "" || itemAt(i)->mAddress == address) {
7608                device = itemAt(i);
7609                if (itemAt(i)->mAddress == address) {
7610                    break;
7611                }
7612            }
7613        }
7614    }
7615    ALOGV("DeviceVector::getDevice() for type %08x address %s found %p",
7616          type, address.string(), device.get());
7617    return device;
7618}
7619
7620sp<AudioPolicyManager::DeviceDescriptor> AudioPolicyManager::DeviceVector::getDeviceFromId(
7621                                                                    audio_port_handle_t id) const
7622{
7623    sp<DeviceDescriptor> device;
7624    for (size_t i = 0; i < size(); i++) {
7625        ALOGV("DeviceVector::getDeviceFromId(%d) itemAt(%zu)->mId %d", id, i, itemAt(i)->mId);
7626        if (itemAt(i)->mId == id) {
7627            device = itemAt(i);
7628            break;
7629        }
7630    }
7631    return device;
7632}
7633
7634AudioPolicyManager::DeviceVector AudioPolicyManager::DeviceVector::getDevicesFromType(
7635                                                                        audio_devices_t type) const
7636{
7637    DeviceVector devices;
7638    for (size_t i = 0; (i < size()) && (type != AUDIO_DEVICE_NONE); i++) {
7639        if (itemAt(i)->mDeviceType & type & ~AUDIO_DEVICE_BIT_IN) {
7640            devices.add(itemAt(i));
7641            type &= ~itemAt(i)->mDeviceType;
7642            ALOGV("DeviceVector::getDevicesFromType() for type %x found %p",
7643                  itemAt(i)->mDeviceType, itemAt(i).get());
7644        }
7645    }
7646    return devices;
7647}
7648
7649AudioPolicyManager::DeviceVector AudioPolicyManager::DeviceVector::getDevicesFromTypeAddr(
7650        audio_devices_t type, String8 address) const
7651{
7652    DeviceVector devices;
7653    for (size_t i = 0; i < size(); i++) {
7654        if (itemAt(i)->mDeviceType == type) {
7655            if (itemAt(i)->mAddress == address) {
7656                devices.add(itemAt(i));
7657            }
7658        }
7659    }
7660    return devices;
7661}
7662
7663sp<AudioPolicyManager::DeviceDescriptor> AudioPolicyManager::DeviceVector::getDeviceFromName(
7664        const String8& name) const
7665{
7666    sp<DeviceDescriptor> device;
7667    for (size_t i = 0; i < size(); i++) {
7668        if (itemAt(i)->mName == name) {
7669            device = itemAt(i);
7670            break;
7671        }
7672    }
7673    return device;
7674}
7675
7676void AudioPolicyManager::DeviceDescriptor::toAudioPortConfig(
7677                                                    struct audio_port_config *dstConfig,
7678                                                    const struct audio_port_config *srcConfig) const
7679{
7680    dstConfig->config_mask = AUDIO_PORT_CONFIG_CHANNEL_MASK|AUDIO_PORT_CONFIG_GAIN;
7681    if (srcConfig != NULL) {
7682        dstConfig->config_mask |= srcConfig->config_mask;
7683    }
7684
7685    AudioPortConfig::toAudioPortConfig(dstConfig, srcConfig);
7686
7687    dstConfig->id = mId;
7688    dstConfig->role = audio_is_output_device(mDeviceType) ?
7689                        AUDIO_PORT_ROLE_SINK : AUDIO_PORT_ROLE_SOURCE;
7690    dstConfig->type = AUDIO_PORT_TYPE_DEVICE;
7691    dstConfig->ext.device.type = mDeviceType;
7692    dstConfig->ext.device.hw_module = mModule->mHandle;
7693    strncpy(dstConfig->ext.device.address, mAddress.string(), AUDIO_DEVICE_MAX_ADDRESS_LEN);
7694}
7695
7696void AudioPolicyManager::DeviceDescriptor::toAudioPort(struct audio_port *port) const
7697{
7698    ALOGV("DeviceDescriptor::toAudioPort() handle %d type %x", mId, mDeviceType);
7699    AudioPort::toAudioPort(port);
7700    port->id = mId;
7701    toAudioPortConfig(&port->active_config);
7702    port->ext.device.type = mDeviceType;
7703    port->ext.device.hw_module = mModule->mHandle;
7704    strncpy(port->ext.device.address, mAddress.string(), AUDIO_DEVICE_MAX_ADDRESS_LEN);
7705}
7706
7707status_t AudioPolicyManager::DeviceDescriptor::dump(int fd, int spaces, int index) const
7708{
7709    const size_t SIZE = 256;
7710    char buffer[SIZE];
7711    String8 result;
7712
7713    snprintf(buffer, SIZE, "%*sDevice %d:\n", spaces, "", index+1);
7714    result.append(buffer);
7715    if (mId != 0) {
7716        snprintf(buffer, SIZE, "%*s- id: %2d\n", spaces, "", mId);
7717        result.append(buffer);
7718    }
7719    snprintf(buffer, SIZE, "%*s- type: %-48s\n", spaces, "",
7720                                              enumToString(sDeviceNameToEnumTable,
7721                                                           ARRAY_SIZE(sDeviceNameToEnumTable),
7722                                                           mDeviceType));
7723    result.append(buffer);
7724    if (mAddress.size() != 0) {
7725        snprintf(buffer, SIZE, "%*s- address: %-32s\n", spaces, "", mAddress.string());
7726        result.append(buffer);
7727    }
7728    write(fd, result.string(), result.size());
7729    AudioPort::dump(fd, spaces);
7730
7731    return NO_ERROR;
7732}
7733
7734status_t AudioPolicyManager::AudioPatch::dump(int fd, int spaces, int index) const
7735{
7736    const size_t SIZE = 256;
7737    char buffer[SIZE];
7738    String8 result;
7739
7740
7741    snprintf(buffer, SIZE, "%*sAudio patch %d:\n", spaces, "", index+1);
7742    result.append(buffer);
7743    snprintf(buffer, SIZE, "%*s- handle: %2d\n", spaces, "", mHandle);
7744    result.append(buffer);
7745    snprintf(buffer, SIZE, "%*s- audio flinger handle: %2d\n", spaces, "", mAfPatchHandle);
7746    result.append(buffer);
7747    snprintf(buffer, SIZE, "%*s- owner uid: %2d\n", spaces, "", mUid);
7748    result.append(buffer);
7749    snprintf(buffer, SIZE, "%*s- %d sources:\n", spaces, "", mPatch.num_sources);
7750    result.append(buffer);
7751    for (size_t i = 0; i < mPatch.num_sources; i++) {
7752        if (mPatch.sources[i].type == AUDIO_PORT_TYPE_DEVICE) {
7753            snprintf(buffer, SIZE, "%*s- Device ID %d %s\n", spaces + 2, "",
7754                     mPatch.sources[i].id, enumToString(sDeviceNameToEnumTable,
7755                                                        ARRAY_SIZE(sDeviceNameToEnumTable),
7756                                                        mPatch.sources[i].ext.device.type));
7757        } else {
7758            snprintf(buffer, SIZE, "%*s- Mix ID %d I/O handle %d\n", spaces + 2, "",
7759                     mPatch.sources[i].id, mPatch.sources[i].ext.mix.handle);
7760        }
7761        result.append(buffer);
7762    }
7763    snprintf(buffer, SIZE, "%*s- %d sinks:\n", spaces, "", mPatch.num_sinks);
7764    result.append(buffer);
7765    for (size_t i = 0; i < mPatch.num_sinks; i++) {
7766        if (mPatch.sinks[i].type == AUDIO_PORT_TYPE_DEVICE) {
7767            snprintf(buffer, SIZE, "%*s- Device ID %d %s\n", spaces + 2, "",
7768                     mPatch.sinks[i].id, enumToString(sDeviceNameToEnumTable,
7769                                                        ARRAY_SIZE(sDeviceNameToEnumTable),
7770                                                        mPatch.sinks[i].ext.device.type));
7771        } else {
7772            snprintf(buffer, SIZE, "%*s- Mix ID %d I/O handle %d\n", spaces + 2, "",
7773                     mPatch.sinks[i].id, mPatch.sinks[i].ext.mix.handle);
7774        }
7775        result.append(buffer);
7776    }
7777
7778    write(fd, result.string(), result.size());
7779    return NO_ERROR;
7780}
7781
7782// --- audio_policy.conf file parsing
7783
7784uint32_t AudioPolicyManager::parseOutputFlagNames(char *name)
7785{
7786    uint32_t flag = 0;
7787
7788    // it is OK to cast name to non const here as we are not going to use it after
7789    // strtok() modifies it
7790    char *flagName = strtok(name, "|");
7791    while (flagName != NULL) {
7792        if (strlen(flagName) != 0) {
7793            flag |= stringToEnum(sOutputFlagNameToEnumTable,
7794                               ARRAY_SIZE(sOutputFlagNameToEnumTable),
7795                               flagName);
7796        }
7797        flagName = strtok(NULL, "|");
7798    }
7799    //force direct flag if offload flag is set: offloading implies a direct output stream
7800    // and all common behaviors are driven by checking only the direct flag
7801    // this should normally be set appropriately in the policy configuration file
7802    if ((flag & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0) {
7803        flag |= AUDIO_OUTPUT_FLAG_DIRECT;
7804    }
7805
7806    return flag;
7807}
7808
7809uint32_t AudioPolicyManager::parseInputFlagNames(char *name)
7810{
7811    uint32_t flag = 0;
7812
7813    // it is OK to cast name to non const here as we are not going to use it after
7814    // strtok() modifies it
7815    char *flagName = strtok(name, "|");
7816    while (flagName != NULL) {
7817        if (strlen(flagName) != 0) {
7818            flag |= stringToEnum(sInputFlagNameToEnumTable,
7819                               ARRAY_SIZE(sInputFlagNameToEnumTable),
7820                               flagName);
7821        }
7822        flagName = strtok(NULL, "|");
7823    }
7824    return flag;
7825}
7826
7827audio_devices_t AudioPolicyManager::parseDeviceNames(char *name)
7828{
7829    uint32_t device = 0;
7830
7831    char *devName = strtok(name, "|");
7832    while (devName != NULL) {
7833        if (strlen(devName) != 0) {
7834            device |= stringToEnum(sDeviceNameToEnumTable,
7835                                 ARRAY_SIZE(sDeviceNameToEnumTable),
7836                                 devName);
7837         }
7838        devName = strtok(NULL, "|");
7839     }
7840    return device;
7841}
7842
7843void AudioPolicyManager::loadHwModule(cnode *root)
7844{
7845    status_t status = NAME_NOT_FOUND;
7846    cnode *node;
7847    sp<HwModule> module = new HwModule(root->name);
7848
7849    node = config_find(root, DEVICES_TAG);
7850    if (node != NULL) {
7851        node = node->first_child;
7852        while (node) {
7853            ALOGV("loadHwModule() loading device %s", node->name);
7854            status_t tmpStatus = module->loadDevice(node);
7855            if (status == NAME_NOT_FOUND || status == NO_ERROR) {
7856                status = tmpStatus;
7857            }
7858            node = node->next;
7859        }
7860    }
7861    node = config_find(root, OUTPUTS_TAG);
7862    if (node != NULL) {
7863        node = node->first_child;
7864        while (node) {
7865            ALOGV("loadHwModule() loading output %s", node->name);
7866            status_t tmpStatus = module->loadOutput(node);
7867            if (status == NAME_NOT_FOUND || status == NO_ERROR) {
7868                status = tmpStatus;
7869            }
7870            node = node->next;
7871        }
7872    }
7873    node = config_find(root, INPUTS_TAG);
7874    if (node != NULL) {
7875        node = node->first_child;
7876        while (node) {
7877            ALOGV("loadHwModule() loading input %s", node->name);
7878            status_t tmpStatus = module->loadInput(node);
7879            if (status == NAME_NOT_FOUND || status == NO_ERROR) {
7880                status = tmpStatus;
7881            }
7882            node = node->next;
7883        }
7884    }
7885    loadGlobalConfig(root, module);
7886
7887    if (status == NO_ERROR) {
7888        mHwModules.add(module);
7889    }
7890}
7891
7892void AudioPolicyManager::loadHwModules(cnode *root)
7893{
7894    cnode *node = config_find(root, AUDIO_HW_MODULE_TAG);
7895    if (node == NULL) {
7896        return;
7897    }
7898
7899    node = node->first_child;
7900    while (node) {
7901        ALOGV("loadHwModules() loading module %s", node->name);
7902        loadHwModule(node);
7903        node = node->next;
7904    }
7905}
7906
7907void AudioPolicyManager::loadGlobalConfig(cnode *root, const sp<HwModule>& module)
7908{
7909    cnode *node = config_find(root, GLOBAL_CONFIG_TAG);
7910
7911    if (node == NULL) {
7912        return;
7913    }
7914    DeviceVector declaredDevices;
7915    if (module != NULL) {
7916        declaredDevices = module->mDeclaredDevices;
7917    }
7918
7919    node = node->first_child;
7920    while (node) {
7921        if (strcmp(ATTACHED_OUTPUT_DEVICES_TAG, node->name) == 0) {
7922            mAvailableOutputDevices.loadDevicesFromName((char *)node->value,
7923                                                        declaredDevices);
7924            ALOGV("loadGlobalConfig() Attached Output Devices %08x",
7925                  mAvailableOutputDevices.types());
7926        } else if (strcmp(DEFAULT_OUTPUT_DEVICE_TAG, node->name) == 0) {
7927            audio_devices_t device = (audio_devices_t)stringToEnum(sDeviceNameToEnumTable,
7928                                              ARRAY_SIZE(sDeviceNameToEnumTable),
7929                                              (char *)node->value);
7930            if (device != AUDIO_DEVICE_NONE) {
7931                mDefaultOutputDevice = new DeviceDescriptor(String8(""), device);
7932            } else {
7933                ALOGW("loadGlobalConfig() default device not specified");
7934            }
7935            ALOGV("loadGlobalConfig() mDefaultOutputDevice %08x", mDefaultOutputDevice->mDeviceType);
7936        } else if (strcmp(ATTACHED_INPUT_DEVICES_TAG, node->name) == 0) {
7937            mAvailableInputDevices.loadDevicesFromName((char *)node->value,
7938                                                       declaredDevices);
7939            ALOGV("loadGlobalConfig() Available InputDevices %08x", mAvailableInputDevices.types());
7940        } else if (strcmp(SPEAKER_DRC_ENABLED_TAG, node->name) == 0) {
7941            mSpeakerDrcEnabled = stringToBool((char *)node->value);
7942            ALOGV("loadGlobalConfig() mSpeakerDrcEnabled = %d", mSpeakerDrcEnabled);
7943        } else if (strcmp(AUDIO_HAL_VERSION_TAG, node->name) == 0) {
7944            uint32_t major, minor;
7945            sscanf((char *)node->value, "%u.%u", &major, &minor);
7946            module->mHalVersion = HARDWARE_DEVICE_API_VERSION(major, minor);
7947            ALOGV("loadGlobalConfig() mHalVersion = %04x major %u minor %u",
7948                  module->mHalVersion, major, minor);
7949        }
7950        node = node->next;
7951    }
7952}
7953
7954status_t AudioPolicyManager::loadAudioPolicyConfig(const char *path)
7955{
7956    cnode *root;
7957    char *data;
7958
7959    data = (char *)load_file(path, NULL);
7960    if (data == NULL) {
7961        return -ENODEV;
7962    }
7963    root = config_node("", "");
7964    config_load(root, data);
7965
7966    loadHwModules(root);
7967    // legacy audio_policy.conf files have one global_configuration section
7968    loadGlobalConfig(root, getModuleFromName(AUDIO_HARDWARE_MODULE_ID_PRIMARY));
7969    config_free(root);
7970    free(root);
7971    free(data);
7972
7973    ALOGI("loadAudioPolicyConfig() loaded %s\n", path);
7974
7975    return NO_ERROR;
7976}
7977
7978void AudioPolicyManager::defaultAudioPolicyConfig(void)
7979{
7980    sp<HwModule> module;
7981    sp<IOProfile> profile;
7982    sp<DeviceDescriptor> defaultInputDevice = new DeviceDescriptor(String8(""),
7983                                                                   AUDIO_DEVICE_IN_BUILTIN_MIC);
7984    mAvailableOutputDevices.add(mDefaultOutputDevice);
7985    mAvailableInputDevices.add(defaultInputDevice);
7986
7987    module = new HwModule("primary");
7988
7989    profile = new IOProfile(String8("primary"), AUDIO_PORT_ROLE_SOURCE, module);
7990    profile->mSamplingRates.add(44100);
7991    profile->mFormats.add(AUDIO_FORMAT_PCM_16_BIT);
7992    profile->mChannelMasks.add(AUDIO_CHANNEL_OUT_STEREO);
7993    profile->mSupportedDevices.add(mDefaultOutputDevice);
7994    profile->mFlags = AUDIO_OUTPUT_FLAG_PRIMARY;
7995    module->mOutputProfiles.add(profile);
7996
7997    profile = new IOProfile(String8("primary"), AUDIO_PORT_ROLE_SINK, module);
7998    profile->mSamplingRates.add(8000);
7999    profile->mFormats.add(AUDIO_FORMAT_PCM_16_BIT);
8000    profile->mChannelMasks.add(AUDIO_CHANNEL_IN_MONO);
8001    profile->mSupportedDevices.add(defaultInputDevice);
8002    module->mInputProfiles.add(profile);
8003
8004    mHwModules.add(module);
8005}
8006
8007audio_stream_type_t AudioPolicyManager::streamTypefromAttributesInt(const audio_attributes_t *attr)
8008{
8009    // flags to stream type mapping
8010    if ((attr->flags & AUDIO_FLAG_AUDIBILITY_ENFORCED) == AUDIO_FLAG_AUDIBILITY_ENFORCED) {
8011        return AUDIO_STREAM_ENFORCED_AUDIBLE;
8012    }
8013    if ((attr->flags & AUDIO_FLAG_SCO) == AUDIO_FLAG_SCO) {
8014        return AUDIO_STREAM_BLUETOOTH_SCO;
8015    }
8016    if ((attr->flags & AUDIO_FLAG_BEACON) == AUDIO_FLAG_BEACON) {
8017        return AUDIO_STREAM_TTS;
8018    }
8019
8020    // usage to stream type mapping
8021    switch (attr->usage) {
8022    case AUDIO_USAGE_MEDIA:
8023    case AUDIO_USAGE_GAME:
8024    case AUDIO_USAGE_ASSISTANCE_NAVIGATION_GUIDANCE:
8025        return AUDIO_STREAM_MUSIC;
8026    case AUDIO_USAGE_ASSISTANCE_ACCESSIBILITY:
8027        if (isStreamActive(AUDIO_STREAM_ALARM)) {
8028            return AUDIO_STREAM_ALARM;
8029        }
8030        if (isStreamActive(AUDIO_STREAM_RING)) {
8031            return AUDIO_STREAM_RING;
8032        }
8033        if (isInCall()) {
8034            return AUDIO_STREAM_VOICE_CALL;
8035        }
8036        return AUDIO_STREAM_ACCESSIBILITY;
8037    case AUDIO_USAGE_ASSISTANCE_SONIFICATION:
8038        return AUDIO_STREAM_SYSTEM;
8039    case AUDIO_USAGE_VOICE_COMMUNICATION:
8040        return AUDIO_STREAM_VOICE_CALL;
8041
8042    case AUDIO_USAGE_VOICE_COMMUNICATION_SIGNALLING:
8043        return AUDIO_STREAM_DTMF;
8044
8045    case AUDIO_USAGE_ALARM:
8046        return AUDIO_STREAM_ALARM;
8047    case AUDIO_USAGE_NOTIFICATION_TELEPHONY_RINGTONE:
8048        return AUDIO_STREAM_RING;
8049
8050    case AUDIO_USAGE_NOTIFICATION:
8051    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_REQUEST:
8052    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_INSTANT:
8053    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_DELAYED:
8054    case AUDIO_USAGE_NOTIFICATION_EVENT:
8055        return AUDIO_STREAM_NOTIFICATION;
8056
8057    case AUDIO_USAGE_UNKNOWN:
8058    default:
8059        return AUDIO_STREAM_MUSIC;
8060    }
8061}
8062
8063bool AudioPolicyManager::isValidAttributes(const audio_attributes_t *paa) {
8064    // has flags that map to a strategy?
8065    if ((paa->flags & (AUDIO_FLAG_AUDIBILITY_ENFORCED | AUDIO_FLAG_SCO | AUDIO_FLAG_BEACON)) != 0) {
8066        return true;
8067    }
8068
8069    // has known usage?
8070    switch (paa->usage) {
8071    case AUDIO_USAGE_UNKNOWN:
8072    case AUDIO_USAGE_MEDIA:
8073    case AUDIO_USAGE_VOICE_COMMUNICATION:
8074    case AUDIO_USAGE_VOICE_COMMUNICATION_SIGNALLING:
8075    case AUDIO_USAGE_ALARM:
8076    case AUDIO_USAGE_NOTIFICATION:
8077    case AUDIO_USAGE_NOTIFICATION_TELEPHONY_RINGTONE:
8078    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_REQUEST:
8079    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_INSTANT:
8080    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_DELAYED:
8081    case AUDIO_USAGE_NOTIFICATION_EVENT:
8082    case AUDIO_USAGE_ASSISTANCE_ACCESSIBILITY:
8083    case AUDIO_USAGE_ASSISTANCE_NAVIGATION_GUIDANCE:
8084    case AUDIO_USAGE_ASSISTANCE_SONIFICATION:
8085    case AUDIO_USAGE_GAME:
8086    case AUDIO_USAGE_VIRTUAL_SOURCE:
8087        break;
8088    default:
8089        return false;
8090    }
8091    return true;
8092}
8093
8094}; // namespace android
8095