AudioPolicyManager.cpp revision 79ad438ed25c59a37244a48899263bbc4bc92f5d 
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    String8 address = (device_address == NULL) ? String8("") : String8(device_address);
226    // handle legacy remote submix case where the address was not always specified
227    if (deviceDistinguishesOnAddress(device) && (address.length() == 0)) {
228        address = String8("0");
229    }
230
231    ALOGV("setDeviceConnectionState() device: %x, state %d, address %s",
232            device, state, address.string());
233
234    // connect/disconnect only 1 device at a time
235    if (!audio_is_output_device(device) && !audio_is_input_device(device)) return BAD_VALUE;
236
237    // handle output devices
238    if (audio_is_output_device(device)) {
239        SortedVector <audio_io_handle_t> outputs;
240
241        sp<DeviceDescriptor> devDesc = new DeviceDescriptor(String8(""), device);
242        devDesc->mAddress = address;
243        ssize_t index = mAvailableOutputDevices.indexOf(devDesc);
244
245        // save a copy of the opened output descriptors before any output is opened or closed
246        // by checkOutputsForDevice(). This will be needed by checkOutputForAllStrategies()
247        mPreviousOutputs = mOutputs;
248        switch (state)
249        {
250        // handle output device connection
251        case AUDIO_POLICY_DEVICE_STATE_AVAILABLE:
252            if (index >= 0) {
253                ALOGW("setDeviceConnectionState() device already connected: %x", device);
254                return INVALID_OPERATION;
255            }
256            ALOGV("setDeviceConnectionState() connecting device %x", device);
257
258            // register new device as available
259            index = mAvailableOutputDevices.add(devDesc);
260            if (index >= 0) {
261                sp<HwModule> module = getModuleForDevice(device);
262                if (module == 0) {
263                    ALOGD("setDeviceConnectionState() could not find HW module for device %08x",
264                          device);
265                    mAvailableOutputDevices.remove(devDesc);
266                    return INVALID_OPERATION;
267                }
268                mAvailableOutputDevices[index]->mId = nextUniqueId();
269                mAvailableOutputDevices[index]->mModule = module;
270            } else {
271                return NO_MEMORY;
272            }
273
274            if (checkOutputsForDevice(devDesc, state, outputs, address) != NO_ERROR) {
275                mAvailableOutputDevices.remove(devDesc);
276                return INVALID_OPERATION;
277            }
278            // outputs should never be empty here
279            ALOG_ASSERT(outputs.size() != 0, "setDeviceConnectionState():"
280                    "checkOutputsForDevice() returned no outputs but status OK");
281            ALOGV("setDeviceConnectionState() checkOutputsForDevice() returned %zu outputs",
282                  outputs.size());
283            break;
284        // handle output device disconnection
285        case AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE: {
286            if (index < 0) {
287                ALOGW("setDeviceConnectionState() device not connected: %x", device);
288                return INVALID_OPERATION;
289            }
290
291            ALOGV("setDeviceConnectionState() disconnecting output device %x", device);
292
293            // Set Disconnect to HALs
294            AudioParameter param = AudioParameter(address);
295            param.addInt(String8(AUDIO_PARAMETER_DEVICE_DISCONNECT), device);
296            mpClientInterface->setParameters(AUDIO_IO_HANDLE_NONE, param.toString());
297
298            // remove device from available output devices
299            mAvailableOutputDevices.remove(devDesc);
300
301            checkOutputsForDevice(devDesc, state, outputs, address);
302            } break;
303
304        default:
305            ALOGE("setDeviceConnectionState() invalid state: %x", state);
306            return BAD_VALUE;
307        }
308
309        // checkA2dpSuspend must run before checkOutputForAllStrategies so that A2DP
310        // output is suspended before any tracks are moved to it
311        checkA2dpSuspend();
312        checkOutputForAllStrategies();
313        // outputs must be closed after checkOutputForAllStrategies() is executed
314        if (!outputs.isEmpty()) {
315            for (size_t i = 0; i < outputs.size(); i++) {
316                sp<AudioOutputDescriptor> desc = mOutputs.valueFor(outputs[i]);
317                // close unused outputs after device disconnection or direct outputs that have been
318                // opened by checkOutputsForDevice() to query dynamic parameters
319                if ((state == AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE) ||
320                        (((desc->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) != 0) &&
321                         (desc->mDirectOpenCount == 0))) {
322                    closeOutput(outputs[i]);
323                }
324            }
325            // check again after closing A2DP output to reset mA2dpSuspended if needed
326            checkA2dpSuspend();
327        }
328
329        updateDevicesAndOutputs();
330        if (mPhoneState == AUDIO_MODE_IN_CALL) {
331            audio_devices_t newDevice = getNewOutputDevice(mPrimaryOutput, false /*fromCache*/);
332            updateCallRouting(newDevice);
333        }
334        for (size_t i = 0; i < mOutputs.size(); i++) {
335            audio_io_handle_t output = mOutputs.keyAt(i);
336            if ((mPhoneState != AUDIO_MODE_IN_CALL) || (output != mPrimaryOutput)) {
337                audio_devices_t newDevice = getNewOutputDevice(mOutputs.keyAt(i),
338                                                               true /*fromCache*/);
339                // do not force device change on duplicated output because if device is 0, it will
340                // also force a device 0 for the two outputs it is duplicated to which may override
341                // a valid device selection on those outputs.
342                bool force = !mOutputs.valueAt(i)->isDuplicated()
343                        && (!deviceDistinguishesOnAddress(device)
344                                // always force when disconnecting (a non-duplicated device)
345                                || (state == AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE));
346                setOutputDevice(output, newDevice, force, 0);
347            }
348        }
349
350        mpClientInterface->onAudioPortListUpdate();
351        return NO_ERROR;
352    }  // end if is output device
353
354    // handle input devices
355    if (audio_is_input_device(device)) {
356        SortedVector <audio_io_handle_t> inputs;
357
358        sp<DeviceDescriptor> devDesc = new DeviceDescriptor(String8(""), device);
359        devDesc->mAddress = address;
360        ssize_t index = mAvailableInputDevices.indexOf(devDesc);
361        switch (state)
362        {
363        // handle input device connection
364        case AUDIO_POLICY_DEVICE_STATE_AVAILABLE: {
365            if (index >= 0) {
366                ALOGW("setDeviceConnectionState() device already connected: %d", device);
367                return INVALID_OPERATION;
368            }
369            sp<HwModule> module = getModuleForDevice(device);
370            if (module == NULL) {
371                ALOGW("setDeviceConnectionState(): could not find HW module for device %08x",
372                      device);
373                return INVALID_OPERATION;
374            }
375            if (checkInputsForDevice(device, state, inputs, address) != NO_ERROR) {
376                return INVALID_OPERATION;
377            }
378
379            index = mAvailableInputDevices.add(devDesc);
380            if (index >= 0) {
381                mAvailableInputDevices[index]->mId = nextUniqueId();
382                mAvailableInputDevices[index]->mModule = module;
383            } else {
384                return NO_MEMORY;
385            }
386        } break;
387
388        // handle input device disconnection
389        case AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE: {
390            if (index < 0) {
391                ALOGW("setDeviceConnectionState() device not connected: %d", device);
392                return INVALID_OPERATION;
393            }
394
395            ALOGV("setDeviceConnectionState() disconnecting input device %x", device);
396
397            // Set Disconnect to HALs
398            AudioParameter param = AudioParameter(address);
399            param.addInt(String8(AUDIO_PARAMETER_DEVICE_DISCONNECT), device);
400            mpClientInterface->setParameters(AUDIO_IO_HANDLE_NONE, param.toString());
401
402            checkInputsForDevice(device, state, inputs, address);
403            mAvailableInputDevices.remove(devDesc);
404
405        } break;
406
407        default:
408            ALOGE("setDeviceConnectionState() invalid state: %x", state);
409            return BAD_VALUE;
410        }
411
412        closeAllInputs();
413
414        if (mPhoneState == AUDIO_MODE_IN_CALL) {
415            audio_devices_t newDevice = getNewOutputDevice(mPrimaryOutput, false /*fromCache*/);
416            updateCallRouting(newDevice);
417        }
418
419        mpClientInterface->onAudioPortListUpdate();
420        return NO_ERROR;
421    } // end if is input device
422
423    ALOGW("setDeviceConnectionState() invalid device: %x", device);
424    return BAD_VALUE;
425}
426
427audio_policy_dev_state_t AudioPolicyManager::getDeviceConnectionState(audio_devices_t device,
428                                                  const char *device_address)
429{
430    audio_policy_dev_state_t state = AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE;
431    sp<DeviceDescriptor> devDesc = new DeviceDescriptor(String8(""), device);
432    devDesc->mAddress = (device_address == NULL) ? String8("") : String8(device_address);
433    // handle legacy remote submix case where the address was not always specified
434    if (deviceDistinguishesOnAddress(device) && (devDesc->mAddress.length() == 0)) {
435        devDesc->mAddress = String8("0");
436    }
437    ssize_t index;
438    DeviceVector *deviceVector;
439
440    if (audio_is_output_device(device)) {
441        deviceVector = &mAvailableOutputDevices;
442    } else if (audio_is_input_device(device)) {
443        deviceVector = &mAvailableInputDevices;
444    } else {
445        ALOGW("getDeviceConnectionState() invalid device type %08x", device);
446        return AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE;
447    }
448
449    index = deviceVector->indexOf(devDesc);
450    if (index >= 0) {
451        return AUDIO_POLICY_DEVICE_STATE_AVAILABLE;
452    } else {
453        return AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE;
454    }
455}
456
457void AudioPolicyManager::updateCallRouting(audio_devices_t rxDevice, int delayMs)
458{
459    bool createTxPatch = false;
460    struct audio_patch patch;
461    patch.num_sources = 1;
462    patch.num_sinks = 1;
463    status_t status;
464    audio_patch_handle_t afPatchHandle;
465    DeviceVector deviceList;
466
467    audio_devices_t txDevice = getDeviceAndMixForInputSource(AUDIO_SOURCE_VOICE_COMMUNICATION);
468    ALOGV("updateCallRouting device rxDevice %08x txDevice %08x", rxDevice, txDevice);
469
470    // release existing RX patch if any
471    if (mCallRxPatch != 0) {
472        mpClientInterface->releaseAudioPatch(mCallRxPatch->mAfPatchHandle, 0);
473        mCallRxPatch.clear();
474    }
475    // release TX patch if any
476    if (mCallTxPatch != 0) {
477        mpClientInterface->releaseAudioPatch(mCallTxPatch->mAfPatchHandle, 0);
478        mCallTxPatch.clear();
479    }
480
481    // If the RX device is on the primary HW module, then use legacy routing method for voice calls
482    // via setOutputDevice() on primary output.
483    // Otherwise, create two audio patches for TX and RX path.
484    if (availablePrimaryOutputDevices() & rxDevice) {
485        setOutputDevice(mPrimaryOutput, rxDevice, true, delayMs);
486        // If the TX device is also on the primary HW module, setOutputDevice() will take care
487        // of it due to legacy implementation. If not, create a patch.
488        if ((availablePrimaryInputDevices() & txDevice & ~AUDIO_DEVICE_BIT_IN)
489                == AUDIO_DEVICE_NONE) {
490            createTxPatch = true;
491        }
492    } else {
493        // create RX path audio patch
494        deviceList = mAvailableOutputDevices.getDevicesFromType(rxDevice);
495        ALOG_ASSERT(!deviceList.isEmpty(),
496                    "updateCallRouting() selected device not in output device list");
497        sp<DeviceDescriptor> rxSinkDeviceDesc = deviceList.itemAt(0);
498        deviceList = mAvailableInputDevices.getDevicesFromType(AUDIO_DEVICE_IN_TELEPHONY_RX);
499        ALOG_ASSERT(!deviceList.isEmpty(),
500                    "updateCallRouting() no telephony RX device");
501        sp<DeviceDescriptor> rxSourceDeviceDesc = deviceList.itemAt(0);
502
503        rxSourceDeviceDesc->toAudioPortConfig(&patch.sources[0]);
504        rxSinkDeviceDesc->toAudioPortConfig(&patch.sinks[0]);
505
506        // request to reuse existing output stream if one is already opened to reach the RX device
507        SortedVector<audio_io_handle_t> outputs =
508                                getOutputsForDevice(rxDevice, mOutputs);
509        audio_io_handle_t output = selectOutput(outputs,
510                                                AUDIO_OUTPUT_FLAG_NONE,
511                                                AUDIO_FORMAT_INVALID);
512        if (output != AUDIO_IO_HANDLE_NONE) {
513            sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
514            ALOG_ASSERT(!outputDesc->isDuplicated(),
515                        "updateCallRouting() RX device output is duplicated");
516            outputDesc->toAudioPortConfig(&patch.sources[1]);
517            patch.num_sources = 2;
518        }
519
520        afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
521        status = mpClientInterface->createAudioPatch(&patch, &afPatchHandle, 0);
522        ALOGW_IF(status != NO_ERROR, "updateCallRouting() error %d creating RX audio patch",
523                                               status);
524        if (status == NO_ERROR) {
525            mCallRxPatch = new AudioPatch((audio_patch_handle_t)nextUniqueId(),
526                                       &patch, mUidCached);
527            mCallRxPatch->mAfPatchHandle = afPatchHandle;
528            mCallRxPatch->mUid = mUidCached;
529        }
530        createTxPatch = true;
531    }
532    if (createTxPatch) {
533
534        struct audio_patch patch;
535        patch.num_sources = 1;
536        patch.num_sinks = 1;
537        deviceList = mAvailableInputDevices.getDevicesFromType(txDevice);
538        ALOG_ASSERT(!deviceList.isEmpty(),
539                    "updateCallRouting() selected device not in input device list");
540        sp<DeviceDescriptor> txSourceDeviceDesc = deviceList.itemAt(0);
541        txSourceDeviceDesc->toAudioPortConfig(&patch.sources[0]);
542        deviceList = mAvailableOutputDevices.getDevicesFromType(AUDIO_DEVICE_OUT_TELEPHONY_TX);
543        ALOG_ASSERT(!deviceList.isEmpty(),
544                    "updateCallRouting() no telephony TX device");
545        sp<DeviceDescriptor> txSinkDeviceDesc = deviceList.itemAt(0);
546        txSinkDeviceDesc->toAudioPortConfig(&patch.sinks[0]);
547
548        SortedVector<audio_io_handle_t> outputs =
549                                getOutputsForDevice(AUDIO_DEVICE_OUT_TELEPHONY_TX, mOutputs);
550        audio_io_handle_t output = selectOutput(outputs,
551                                                AUDIO_OUTPUT_FLAG_NONE,
552                                                AUDIO_FORMAT_INVALID);
553        // request to reuse existing output stream if one is already opened to reach the TX
554        // path output device
555        if (output != AUDIO_IO_HANDLE_NONE) {
556            sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
557            ALOG_ASSERT(!outputDesc->isDuplicated(),
558                        "updateCallRouting() RX device output is duplicated");
559            outputDesc->toAudioPortConfig(&patch.sources[1]);
560            patch.num_sources = 2;
561        }
562
563        afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
564        status = mpClientInterface->createAudioPatch(&patch, &afPatchHandle, 0);
565        ALOGW_IF(status != NO_ERROR, "setPhoneState() error %d creating TX audio patch",
566                                               status);
567        if (status == NO_ERROR) {
568            mCallTxPatch = new AudioPatch((audio_patch_handle_t)nextUniqueId(),
569                                       &patch, mUidCached);
570            mCallTxPatch->mAfPatchHandle = afPatchHandle;
571            mCallTxPatch->mUid = mUidCached;
572        }
573    }
574}
575
576void AudioPolicyManager::setPhoneState(audio_mode_t state)
577{
578    ALOGV("setPhoneState() state %d", state);
579    if (state < 0 || state >= AUDIO_MODE_CNT) {
580        ALOGW("setPhoneState() invalid state %d", state);
581        return;
582    }
583
584    if (state == mPhoneState ) {
585        ALOGW("setPhoneState() setting same state %d", state);
586        return;
587    }
588
589    // if leaving call state, handle special case of active streams
590    // pertaining to sonification strategy see handleIncallSonification()
591    if (isInCall()) {
592        ALOGV("setPhoneState() in call state management: new state is %d", state);
593        for (int stream = 0; stream < AUDIO_STREAM_CNT; stream++) {
594            if (stream == AUDIO_STREAM_PATCH) {
595                continue;
596            }
597            handleIncallSonification((audio_stream_type_t)stream, false, true);
598        }
599
600        // force reevaluating accessibility routing when call starts
601        mpClientInterface->invalidateStream(AUDIO_STREAM_ACCESSIBILITY);
602    }
603
604    // store previous phone state for management of sonification strategy below
605    int oldState = mPhoneState;
606    mPhoneState = state;
607    bool force = false;
608
609    // are we entering or starting a call
610    if (!isStateInCall(oldState) && isStateInCall(state)) {
611        ALOGV("  Entering call in setPhoneState()");
612        // force routing command to audio hardware when starting a call
613        // even if no device change is needed
614        force = true;
615        for (int j = 0; j < DEVICE_CATEGORY_CNT; j++) {
616            mStreams[AUDIO_STREAM_DTMF].mVolumeCurve[j] =
617                    sVolumeProfiles[AUDIO_STREAM_VOICE_CALL][j];
618        }
619    } else if (isStateInCall(oldState) && !isStateInCall(state)) {
620        ALOGV("  Exiting call in setPhoneState()");
621        // force routing command to audio hardware when exiting a call
622        // even if no device change is needed
623        force = true;
624        for (int j = 0; j < DEVICE_CATEGORY_CNT; j++) {
625            mStreams[AUDIO_STREAM_DTMF].mVolumeCurve[j] =
626                    sVolumeProfiles[AUDIO_STREAM_DTMF][j];
627        }
628    } else if (isStateInCall(state) && (state != oldState)) {
629        ALOGV("  Switching between telephony and VoIP in setPhoneState()");
630        // force routing command to audio hardware when switching between telephony and VoIP
631        // even if no device change is needed
632        force = true;
633    }
634
635    // check for device and output changes triggered by new phone state
636    checkA2dpSuspend();
637    checkOutputForAllStrategies();
638    updateDevicesAndOutputs();
639
640    sp<AudioOutputDescriptor> hwOutputDesc = mOutputs.valueFor(mPrimaryOutput);
641
642    int delayMs = 0;
643    if (isStateInCall(state)) {
644        nsecs_t sysTime = systemTime();
645        for (size_t i = 0; i < mOutputs.size(); i++) {
646            sp<AudioOutputDescriptor> desc = mOutputs.valueAt(i);
647            // mute media and sonification strategies and delay device switch by the largest
648            // latency of any output where either strategy is active.
649            // This avoid sending the ring tone or music tail into the earpiece or headset.
650            if ((desc->isStrategyActive(STRATEGY_MEDIA,
651                                     SONIFICATION_HEADSET_MUSIC_DELAY,
652                                     sysTime) ||
653                    desc->isStrategyActive(STRATEGY_SONIFICATION,
654                                         SONIFICATION_HEADSET_MUSIC_DELAY,
655                                         sysTime)) &&
656                    (delayMs < (int)desc->mLatency*2)) {
657                delayMs = desc->mLatency*2;
658            }
659            setStrategyMute(STRATEGY_MEDIA, true, mOutputs.keyAt(i));
660            setStrategyMute(STRATEGY_MEDIA, false, mOutputs.keyAt(i), MUTE_TIME_MS,
661                getDeviceForStrategy(STRATEGY_MEDIA, true /*fromCache*/));
662            setStrategyMute(STRATEGY_SONIFICATION, true, mOutputs.keyAt(i));
663            setStrategyMute(STRATEGY_SONIFICATION, false, mOutputs.keyAt(i), MUTE_TIME_MS,
664                getDeviceForStrategy(STRATEGY_SONIFICATION, true /*fromCache*/));
665        }
666    }
667
668    // Note that despite the fact that getNewOutputDevice() is called on the primary output,
669    // the device returned is not necessarily reachable via this output
670    audio_devices_t rxDevice = getNewOutputDevice(mPrimaryOutput, false /*fromCache*/);
671    // force routing command to audio hardware when ending call
672    // even if no device change is needed
673    if (isStateInCall(oldState) && rxDevice == AUDIO_DEVICE_NONE) {
674        rxDevice = hwOutputDesc->device();
675    }
676
677    if (state == AUDIO_MODE_IN_CALL) {
678        updateCallRouting(rxDevice, delayMs);
679    } else if (oldState == AUDIO_MODE_IN_CALL) {
680        if (mCallRxPatch != 0) {
681            mpClientInterface->releaseAudioPatch(mCallRxPatch->mAfPatchHandle, 0);
682            mCallRxPatch.clear();
683        }
684        if (mCallTxPatch != 0) {
685            mpClientInterface->releaseAudioPatch(mCallTxPatch->mAfPatchHandle, 0);
686            mCallTxPatch.clear();
687        }
688        setOutputDevice(mPrimaryOutput, rxDevice, force, 0);
689    } else {
690        setOutputDevice(mPrimaryOutput, rxDevice, force, 0);
691    }
692    // if entering in call state, handle special case of active streams
693    // pertaining to sonification strategy see handleIncallSonification()
694    if (isStateInCall(state)) {
695        ALOGV("setPhoneState() in call state management: new state is %d", state);
696        for (int stream = 0; stream < AUDIO_STREAM_CNT; stream++) {
697            if (stream == AUDIO_STREAM_PATCH) {
698                continue;
699            }
700            handleIncallSonification((audio_stream_type_t)stream, true, true);
701        }
702    }
703
704    // Flag that ringtone volume must be limited to music volume until we exit MODE_RINGTONE
705    if (state == AUDIO_MODE_RINGTONE &&
706        isStreamActive(AUDIO_STREAM_MUSIC, SONIFICATION_HEADSET_MUSIC_DELAY)) {
707        mLimitRingtoneVolume = true;
708    } else {
709        mLimitRingtoneVolume = false;
710    }
711}
712
713void AudioPolicyManager::setForceUse(audio_policy_force_use_t usage,
714                                         audio_policy_forced_cfg_t config)
715{
716    ALOGV("setForceUse() usage %d, config %d, mPhoneState %d", usage, config, mPhoneState);
717
718    bool forceVolumeReeval = false;
719    switch(usage) {
720    case AUDIO_POLICY_FORCE_FOR_COMMUNICATION:
721        if (config != AUDIO_POLICY_FORCE_SPEAKER && config != AUDIO_POLICY_FORCE_BT_SCO &&
722            config != AUDIO_POLICY_FORCE_NONE) {
723            ALOGW("setForceUse() invalid config %d for FOR_COMMUNICATION", config);
724            return;
725        }
726        forceVolumeReeval = true;
727        mForceUse[usage] = config;
728        break;
729    case AUDIO_POLICY_FORCE_FOR_MEDIA:
730        if (config != AUDIO_POLICY_FORCE_HEADPHONES && config != AUDIO_POLICY_FORCE_BT_A2DP &&
731            config != AUDIO_POLICY_FORCE_WIRED_ACCESSORY &&
732            config != AUDIO_POLICY_FORCE_ANALOG_DOCK &&
733            config != AUDIO_POLICY_FORCE_DIGITAL_DOCK && config != AUDIO_POLICY_FORCE_NONE &&
734            config != AUDIO_POLICY_FORCE_NO_BT_A2DP && config != AUDIO_POLICY_FORCE_SPEAKER ) {
735            ALOGW("setForceUse() invalid config %d for FOR_MEDIA", config);
736            return;
737        }
738        mForceUse[usage] = config;
739        break;
740    case AUDIO_POLICY_FORCE_FOR_RECORD:
741        if (config != AUDIO_POLICY_FORCE_BT_SCO && config != AUDIO_POLICY_FORCE_WIRED_ACCESSORY &&
742            config != AUDIO_POLICY_FORCE_NONE) {
743            ALOGW("setForceUse() invalid config %d for FOR_RECORD", config);
744            return;
745        }
746        mForceUse[usage] = config;
747        break;
748    case AUDIO_POLICY_FORCE_FOR_DOCK:
749        if (config != AUDIO_POLICY_FORCE_NONE && config != AUDIO_POLICY_FORCE_BT_CAR_DOCK &&
750            config != AUDIO_POLICY_FORCE_BT_DESK_DOCK &&
751            config != AUDIO_POLICY_FORCE_WIRED_ACCESSORY &&
752            config != AUDIO_POLICY_FORCE_ANALOG_DOCK &&
753            config != AUDIO_POLICY_FORCE_DIGITAL_DOCK) {
754            ALOGW("setForceUse() invalid config %d for FOR_DOCK", config);
755        }
756        forceVolumeReeval = true;
757        mForceUse[usage] = config;
758        break;
759    case AUDIO_POLICY_FORCE_FOR_SYSTEM:
760        if (config != AUDIO_POLICY_FORCE_NONE &&
761            config != AUDIO_POLICY_FORCE_SYSTEM_ENFORCED) {
762            ALOGW("setForceUse() invalid config %d for FOR_SYSTEM", config);
763        }
764        forceVolumeReeval = true;
765        mForceUse[usage] = config;
766        break;
767    case AUDIO_POLICY_FORCE_FOR_HDMI_SYSTEM_AUDIO:
768        if (config != AUDIO_POLICY_FORCE_NONE &&
769            config != AUDIO_POLICY_FORCE_HDMI_SYSTEM_AUDIO_ENFORCED) {
770            ALOGW("setForceUse() invalid config %d forHDMI_SYSTEM_AUDIO", config);
771        }
772        mForceUse[usage] = config;
773        break;
774    default:
775        ALOGW("setForceUse() invalid usage %d", usage);
776        break;
777    }
778
779    // check for device and output changes triggered by new force usage
780    checkA2dpSuspend();
781    checkOutputForAllStrategies();
782    updateDevicesAndOutputs();
783    if (mPhoneState == AUDIO_MODE_IN_CALL) {
784        audio_devices_t newDevice = getNewOutputDevice(mPrimaryOutput, true /*fromCache*/);
785        updateCallRouting(newDevice);
786    }
787    for (size_t i = 0; i < mOutputs.size(); i++) {
788        audio_io_handle_t output = mOutputs.keyAt(i);
789        audio_devices_t newDevice = getNewOutputDevice(output, true /*fromCache*/);
790        if ((mPhoneState != AUDIO_MODE_IN_CALL) || (output != mPrimaryOutput)) {
791            setOutputDevice(output, newDevice, (newDevice != AUDIO_DEVICE_NONE));
792        }
793        if (forceVolumeReeval && (newDevice != AUDIO_DEVICE_NONE)) {
794            applyStreamVolumes(output, newDevice, 0, true);
795        }
796    }
797
798    audio_io_handle_t activeInput = getActiveInput();
799    if (activeInput != 0) {
800        setInputDevice(activeInput, getNewInputDevice(activeInput));
801    }
802
803}
804
805audio_policy_forced_cfg_t AudioPolicyManager::getForceUse(audio_policy_force_use_t usage)
806{
807    return mForceUse[usage];
808}
809
810void AudioPolicyManager::setSystemProperty(const char* property, const char* value)
811{
812    ALOGV("setSystemProperty() property %s, value %s", property, value);
813}
814
815// Find a direct output profile compatible with the parameters passed, even if the input flags do
816// not explicitly request a direct output
817sp<AudioPolicyManager::IOProfile> AudioPolicyManager::getProfileForDirectOutput(
818                                                               audio_devices_t device,
819                                                               uint32_t samplingRate,
820                                                               audio_format_t format,
821                                                               audio_channel_mask_t channelMask,
822                                                               audio_output_flags_t flags)
823{
824    for (size_t i = 0; i < mHwModules.size(); i++) {
825        if (mHwModules[i]->mHandle == 0) {
826            continue;
827        }
828        for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++) {
829            sp<IOProfile> profile = mHwModules[i]->mOutputProfiles[j];
830            bool found = profile->isCompatibleProfile(device, String8(""), samplingRate,
831                    NULL /*updatedSamplingRate*/, format, channelMask,
832                    flags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD ?
833                        AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD : AUDIO_OUTPUT_FLAG_DIRECT);
834            if (found && (mAvailableOutputDevices.types() & profile->mSupportedDevices.types())) {
835                return profile;
836            }
837        }
838    }
839    return 0;
840}
841
842audio_io_handle_t AudioPolicyManager::getOutput(audio_stream_type_t stream,
843                                    uint32_t samplingRate,
844                                    audio_format_t format,
845                                    audio_channel_mask_t channelMask,
846                                    audio_output_flags_t flags,
847                                    const audio_offload_info_t *offloadInfo)
848{
849    routing_strategy strategy = getStrategy(stream);
850    audio_devices_t device = getDeviceForStrategy(strategy, false /*fromCache*/);
851    ALOGV("getOutput() device %d, stream %d, samplingRate %d, format %x, channelMask %x, flags %x",
852          device, stream, samplingRate, format, channelMask, flags);
853
854    return getOutputForDevice(device, AUDIO_SESSION_ALLOCATE,
855                              stream, samplingRate,format, channelMask,
856                              flags, offloadInfo);
857}
858
859status_t AudioPolicyManager::getOutputForAttr(const audio_attributes_t *attr,
860                                              audio_io_handle_t *output,
861                                              audio_session_t session,
862                                              audio_stream_type_t *stream,
863                                              uint32_t samplingRate,
864                                              audio_format_t format,
865                                              audio_channel_mask_t channelMask,
866                                              audio_output_flags_t flags,
867                                              const audio_offload_info_t *offloadInfo)
868{
869    audio_attributes_t attributes;
870    if (attr != NULL) {
871        if (!isValidAttributes(attr)) {
872            ALOGE("getOutputForAttr() invalid attributes: usage=%d content=%d flags=0x%x tags=[%s]",
873                  attr->usage, attr->content_type, attr->flags,
874                  attr->tags);
875            return BAD_VALUE;
876        }
877        attributes = *attr;
878    } else {
879        if (*stream < AUDIO_STREAM_MIN || *stream >= AUDIO_STREAM_PUBLIC_CNT) {
880            ALOGE("getOutputForAttr():  invalid stream type");
881            return BAD_VALUE;
882        }
883        stream_type_to_audio_attributes(*stream, &attributes);
884    }
885
886    for (size_t i = 0; i < mPolicyMixes.size(); i++) {
887        sp<AudioOutputDescriptor> desc;
888        if (mPolicyMixes[i]->mMix.mMixType == MIX_TYPE_PLAYERS) {
889            for (size_t j = 0; j < mPolicyMixes[i]->mMix.mCriteria.size(); j++) {
890                if ((RULE_MATCH_ATTRIBUTE_USAGE == mPolicyMixes[i]->mMix.mCriteria[j].mRule &&
891                        mPolicyMixes[i]->mMix.mCriteria[j].mAttr.mUsage == attributes.usage) ||
892                    (RULE_EXCLUDE_ATTRIBUTE_USAGE == mPolicyMixes[i]->mMix.mCriteria[j].mRule &&
893                        mPolicyMixes[i]->mMix.mCriteria[j].mAttr.mUsage != attributes.usage)) {
894                    desc = mPolicyMixes[i]->mOutput;
895                    break;
896                }
897                if (strncmp(attributes.tags, "addr=", strlen("addr=")) == 0 &&
898                        strncmp(attributes.tags + strlen("addr="),
899                                mPolicyMixes[i]->mMix.mRegistrationId.string(),
900                                AUDIO_ATTRIBUTES_TAGS_MAX_SIZE - strlen("addr=") - 1) == 0) {
901                    desc = mPolicyMixes[i]->mOutput;
902                    break;
903                }
904            }
905        } else if (mPolicyMixes[i]->mMix.mMixType == MIX_TYPE_RECORDERS) {
906            if (attributes.usage == AUDIO_USAGE_VIRTUAL_SOURCE &&
907                    strncmp(attributes.tags, "addr=", strlen("addr=")) == 0 &&
908                    strncmp(attributes.tags + strlen("addr="),
909                            mPolicyMixes[i]->mMix.mRegistrationId.string(),
910                            AUDIO_ATTRIBUTES_TAGS_MAX_SIZE - strlen("addr=") - 1) == 0) {
911                desc = mPolicyMixes[i]->mOutput;
912            }
913        }
914        if (desc != 0) {
915            if (!audio_is_linear_pcm(format)) {
916                return BAD_VALUE;
917            }
918            desc->mPolicyMix = &mPolicyMixes[i]->mMix;
919            *stream = streamTypefromAttributesInt(&attributes);
920            *output = desc->mIoHandle;
921            ALOGV("getOutputForAttr() returns output %d", *output);
922            return NO_ERROR;
923        }
924    }
925    if (attributes.usage == AUDIO_USAGE_VIRTUAL_SOURCE) {
926        ALOGW("getOutputForAttr() no policy mix found for usage AUDIO_USAGE_VIRTUAL_SOURCE");
927        return BAD_VALUE;
928    }
929
930    ALOGV("getOutputForAttr() usage=%d, content=%d, tag=%s flags=%08x",
931            attributes.usage, attributes.content_type, attributes.tags, attributes.flags);
932
933    routing_strategy strategy = (routing_strategy) getStrategyForAttr(&attributes);
934    audio_devices_t device = getDeviceForStrategy(strategy, false /*fromCache*/);
935
936    if ((attributes.flags & AUDIO_FLAG_HW_AV_SYNC) != 0) {
937        flags = (audio_output_flags_t)(flags | AUDIO_OUTPUT_FLAG_HW_AV_SYNC);
938    }
939
940    ALOGV("getOutputForAttr() device 0x%x, samplingRate %d, format %x, channelMask %x, flags %x",
941          device, samplingRate, format, channelMask, flags);
942
943    *stream = streamTypefromAttributesInt(&attributes);
944    *output = getOutputForDevice(device, session, *stream,
945                                 samplingRate, format, channelMask,
946                                 flags, offloadInfo);
947    if (*output == AUDIO_IO_HANDLE_NONE) {
948        return INVALID_OPERATION;
949    }
950    return NO_ERROR;
951}
952
953audio_io_handle_t AudioPolicyManager::getOutputForDevice(
954        audio_devices_t device,
955        audio_session_t session __unused,
956        audio_stream_type_t stream,
957        uint32_t samplingRate,
958        audio_format_t format,
959        audio_channel_mask_t channelMask,
960        audio_output_flags_t flags,
961        const audio_offload_info_t *offloadInfo)
962{
963    audio_io_handle_t output = AUDIO_IO_HANDLE_NONE;
964    uint32_t latency = 0;
965    status_t status;
966
967#ifdef AUDIO_POLICY_TEST
968    if (mCurOutput != 0) {
969        ALOGV("getOutput() test output mCurOutput %d, samplingRate %d, format %d, channelMask %x, mDirectOutput %d",
970                mCurOutput, mTestSamplingRate, mTestFormat, mTestChannels, mDirectOutput);
971
972        if (mTestOutputs[mCurOutput] == 0) {
973            ALOGV("getOutput() opening test output");
974            sp<AudioOutputDescriptor> outputDesc = new AudioOutputDescriptor(NULL);
975            outputDesc->mDevice = mTestDevice;
976            outputDesc->mLatency = mTestLatencyMs;
977            outputDesc->mFlags =
978                    (audio_output_flags_t)(mDirectOutput ? AUDIO_OUTPUT_FLAG_DIRECT : 0);
979            outputDesc->mRefCount[stream] = 0;
980            audio_config_t config = AUDIO_CONFIG_INITIALIZER;
981            config.sample_rate = mTestSamplingRate;
982            config.channel_mask = mTestChannels;
983            config.format = mTestFormat;
984            if (offloadInfo != NULL) {
985                config.offload_info = *offloadInfo;
986            }
987            status = mpClientInterface->openOutput(0,
988                                                  &mTestOutputs[mCurOutput],
989                                                  &config,
990                                                  &outputDesc->mDevice,
991                                                  String8(""),
992                                                  &outputDesc->mLatency,
993                                                  outputDesc->mFlags);
994            if (status == NO_ERROR) {
995                outputDesc->mSamplingRate = config.sample_rate;
996                outputDesc->mFormat = config.format;
997                outputDesc->mChannelMask = config.channel_mask;
998                AudioParameter outputCmd = AudioParameter();
999                outputCmd.addInt(String8("set_id"),mCurOutput);
1000                mpClientInterface->setParameters(mTestOutputs[mCurOutput],outputCmd.toString());
1001                addOutput(mTestOutputs[mCurOutput], outputDesc);
1002            }
1003        }
1004        return mTestOutputs[mCurOutput];
1005    }
1006#endif //AUDIO_POLICY_TEST
1007
1008    // open a direct output if required by specified parameters
1009    //force direct flag if offload flag is set: offloading implies a direct output stream
1010    // and all common behaviors are driven by checking only the direct flag
1011    // this should normally be set appropriately in the policy configuration file
1012    if ((flags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0) {
1013        flags = (audio_output_flags_t)(flags | AUDIO_OUTPUT_FLAG_DIRECT);
1014    }
1015    if ((flags & AUDIO_OUTPUT_FLAG_HW_AV_SYNC) != 0) {
1016        flags = (audio_output_flags_t)(flags | AUDIO_OUTPUT_FLAG_DIRECT);
1017    }
1018    // only allow deep buffering for music stream type
1019    if (stream != AUDIO_STREAM_MUSIC) {
1020        flags = (audio_output_flags_t)(flags &~AUDIO_OUTPUT_FLAG_DEEP_BUFFER);
1021    }
1022
1023    sp<IOProfile> profile;
1024
1025    // skip direct output selection if the request can obviously be attached to a mixed output
1026    // and not explicitly requested
1027    if (((flags & AUDIO_OUTPUT_FLAG_DIRECT) == 0) &&
1028            audio_is_linear_pcm(format) && samplingRate <= MAX_MIXER_SAMPLING_RATE &&
1029            audio_channel_count_from_out_mask(channelMask) <= 2) {
1030        goto non_direct_output;
1031    }
1032
1033    // Do not allow offloading if one non offloadable effect is enabled. This prevents from
1034    // creating an offloaded track and tearing it down immediately after start when audioflinger
1035    // detects there is an active non offloadable effect.
1036    // FIXME: We should check the audio session here but we do not have it in this context.
1037    // This may prevent offloading in rare situations where effects are left active by apps
1038    // in the background.
1039
1040    if (((flags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) == 0) ||
1041            !isNonOffloadableEffectEnabled()) {
1042        profile = getProfileForDirectOutput(device,
1043                                           samplingRate,
1044                                           format,
1045                                           channelMask,
1046                                           (audio_output_flags_t)flags);
1047    }
1048
1049    if (profile != 0) {
1050        sp<AudioOutputDescriptor> outputDesc = NULL;
1051
1052        for (size_t i = 0; i < mOutputs.size(); i++) {
1053            sp<AudioOutputDescriptor> desc = mOutputs.valueAt(i);
1054            if (!desc->isDuplicated() && (profile == desc->mProfile)) {
1055                outputDesc = desc;
1056                // reuse direct output if currently open and configured with same parameters
1057                if ((samplingRate == outputDesc->mSamplingRate) &&
1058                        (format == outputDesc->mFormat) &&
1059                        (channelMask == outputDesc->mChannelMask)) {
1060                    outputDesc->mDirectOpenCount++;
1061                    ALOGV("getOutput() reusing direct output %d", mOutputs.keyAt(i));
1062                    return mOutputs.keyAt(i);
1063                }
1064            }
1065        }
1066        // close direct output if currently open and configured with different parameters
1067        if (outputDesc != NULL) {
1068            closeOutput(outputDesc->mIoHandle);
1069        }
1070        outputDesc = new AudioOutputDescriptor(profile);
1071        outputDesc->mDevice = device;
1072        outputDesc->mLatency = 0;
1073        outputDesc->mFlags =(audio_output_flags_t) (outputDesc->mFlags | flags);
1074        audio_config_t config = AUDIO_CONFIG_INITIALIZER;
1075        config.sample_rate = samplingRate;
1076        config.channel_mask = channelMask;
1077        config.format = format;
1078        if (offloadInfo != NULL) {
1079            config.offload_info = *offloadInfo;
1080        }
1081        status = mpClientInterface->openOutput(profile->mModule->mHandle,
1082                                               &output,
1083                                               &config,
1084                                               &outputDesc->mDevice,
1085                                               String8(""),
1086                                               &outputDesc->mLatency,
1087                                               outputDesc->mFlags);
1088
1089        // only accept an output with the requested parameters
1090        if (status != NO_ERROR ||
1091            (samplingRate != 0 && samplingRate != config.sample_rate) ||
1092            (format != AUDIO_FORMAT_DEFAULT && format != config.format) ||
1093            (channelMask != 0 && channelMask != config.channel_mask)) {
1094            ALOGV("getOutput() failed opening direct output: output %d samplingRate %d %d,"
1095                    "format %d %d, channelMask %04x %04x", output, samplingRate,
1096                    outputDesc->mSamplingRate, format, outputDesc->mFormat, channelMask,
1097                    outputDesc->mChannelMask);
1098            if (output != AUDIO_IO_HANDLE_NONE) {
1099                mpClientInterface->closeOutput(output);
1100            }
1101            return AUDIO_IO_HANDLE_NONE;
1102        }
1103        outputDesc->mSamplingRate = config.sample_rate;
1104        outputDesc->mChannelMask = config.channel_mask;
1105        outputDesc->mFormat = config.format;
1106        outputDesc->mRefCount[stream] = 0;
1107        outputDesc->mStopTime[stream] = 0;
1108        outputDesc->mDirectOpenCount = 1;
1109
1110        audio_io_handle_t srcOutput = getOutputForEffect();
1111        addOutput(output, outputDesc);
1112        audio_io_handle_t dstOutput = getOutputForEffect();
1113        if (dstOutput == output) {
1114            mpClientInterface->moveEffects(AUDIO_SESSION_OUTPUT_MIX, srcOutput, dstOutput);
1115        }
1116        mPreviousOutputs = mOutputs;
1117        ALOGV("getOutput() returns new direct output %d", output);
1118        mpClientInterface->onAudioPortListUpdate();
1119        return output;
1120    }
1121
1122non_direct_output:
1123
1124    // ignoring channel mask due to downmix capability in mixer
1125
1126    // open a non direct output
1127
1128    // for non direct outputs, only PCM is supported
1129    if (audio_is_linear_pcm(format)) {
1130        // get which output is suitable for the specified stream. The actual
1131        // routing change will happen when startOutput() will be called
1132        SortedVector<audio_io_handle_t> outputs = getOutputsForDevice(device, mOutputs);
1133
1134        // at this stage we should ignore the DIRECT flag as no direct output could be found earlier
1135        flags = (audio_output_flags_t)(flags & ~AUDIO_OUTPUT_FLAG_DIRECT);
1136        output = selectOutput(outputs, flags, format);
1137    }
1138    ALOGW_IF((output == 0), "getOutput() could not find output for stream %d, samplingRate %d,"
1139            "format %d, channels %x, flags %x", stream, samplingRate, format, channelMask, flags);
1140
1141    ALOGV("getOutput() returns output %d", output);
1142
1143    return output;
1144}
1145
1146audio_io_handle_t AudioPolicyManager::selectOutput(const SortedVector<audio_io_handle_t>& outputs,
1147                                                       audio_output_flags_t flags,
1148                                                       audio_format_t format)
1149{
1150    // select one output among several that provide a path to a particular device or set of
1151    // devices (the list was previously build by getOutputsForDevice()).
1152    // The priority is as follows:
1153    // 1: the output with the highest number of requested policy flags
1154    // 2: the primary output
1155    // 3: the first output in the list
1156
1157    if (outputs.size() == 0) {
1158        return 0;
1159    }
1160    if (outputs.size() == 1) {
1161        return outputs[0];
1162    }
1163
1164    int maxCommonFlags = 0;
1165    audio_io_handle_t outputFlags = 0;
1166    audio_io_handle_t outputPrimary = 0;
1167
1168    for (size_t i = 0; i < outputs.size(); i++) {
1169        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(outputs[i]);
1170        if (!outputDesc->isDuplicated()) {
1171            // if a valid format is specified, skip output if not compatible
1172            if (format != AUDIO_FORMAT_INVALID) {
1173                if (outputDesc->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) {
1174                    if (format != outputDesc->mFormat) {
1175                        continue;
1176                    }
1177                } else if (!audio_is_linear_pcm(format)) {
1178                    continue;
1179                }
1180            }
1181
1182            int commonFlags = popcount(outputDesc->mProfile->mFlags & flags);
1183            if (commonFlags > maxCommonFlags) {
1184                outputFlags = outputs[i];
1185                maxCommonFlags = commonFlags;
1186                ALOGV("selectOutput() commonFlags for output %d, %04x", outputs[i], commonFlags);
1187            }
1188            if (outputDesc->mProfile->mFlags & AUDIO_OUTPUT_FLAG_PRIMARY) {
1189                outputPrimary = outputs[i];
1190            }
1191        }
1192    }
1193
1194    if (outputFlags != 0) {
1195        return outputFlags;
1196    }
1197    if (outputPrimary != 0) {
1198        return outputPrimary;
1199    }
1200
1201    return outputs[0];
1202}
1203
1204status_t AudioPolicyManager::startOutput(audio_io_handle_t output,
1205                                             audio_stream_type_t stream,
1206                                             audio_session_t session)
1207{
1208    ALOGV("startOutput() output %d, stream %d, session %d", output, stream, session);
1209    ssize_t index = mOutputs.indexOfKey(output);
1210    if (index < 0) {
1211        ALOGW("startOutput() unknown output %d", output);
1212        return BAD_VALUE;
1213    }
1214
1215    // cannot start playback of STREAM_TTS if any other output is being used
1216    uint32_t beaconMuteLatency = 0;
1217    if (stream == AUDIO_STREAM_TTS) {
1218        ALOGV("\t found BEACON stream");
1219        if (isAnyOutputActive(AUDIO_STREAM_TTS /*streamToIgnore*/)) {
1220            return INVALID_OPERATION;
1221        } else {
1222            beaconMuteLatency = handleEventForBeacon(STARTING_BEACON);
1223        }
1224    } else {
1225        // some playback other than beacon starts
1226        beaconMuteLatency = handleEventForBeacon(STARTING_OUTPUT);
1227    }
1228
1229    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(index);
1230
1231    // increment usage count for this stream on the requested output:
1232    // NOTE that the usage count is the same for duplicated output and hardware output which is
1233    // necessary for a correct control of hardware output routing by startOutput() and stopOutput()
1234    outputDesc->changeRefCount(stream, 1);
1235
1236    if (outputDesc->mRefCount[stream] == 1) {
1237        // starting an output being rerouted?
1238        audio_devices_t newDevice;
1239        if (outputDesc->mPolicyMix != NULL) {
1240            newDevice = AUDIO_DEVICE_OUT_REMOTE_SUBMIX;
1241        } else {
1242            newDevice = getNewOutputDevice(output, false /*fromCache*/);
1243        }
1244        routing_strategy strategy = getStrategy(stream);
1245        bool shouldWait = (strategy == STRATEGY_SONIFICATION) ||
1246                            (strategy == STRATEGY_SONIFICATION_RESPECTFUL) ||
1247                            (beaconMuteLatency > 0);
1248        uint32_t waitMs = beaconMuteLatency;
1249        bool force = false;
1250        for (size_t i = 0; i < mOutputs.size(); i++) {
1251            sp<AudioOutputDescriptor> desc = mOutputs.valueAt(i);
1252            if (desc != outputDesc) {
1253                // force a device change if any other output is managed by the same hw
1254                // module and has a current device selection that differs from selected device.
1255                // In this case, the audio HAL must receive the new device selection so that it can
1256                // change the device currently selected by the other active output.
1257                if (outputDesc->sharesHwModuleWith(desc) &&
1258                    desc->device() != newDevice) {
1259                    force = true;
1260                }
1261                // wait for audio on other active outputs to be presented when starting
1262                // a notification so that audio focus effect can propagate, or that a mute/unmute
1263                // event occurred for beacon
1264                uint32_t latency = desc->latency();
1265                if (shouldWait && desc->isActive(latency * 2) && (waitMs < latency)) {
1266                    waitMs = latency;
1267                }
1268            }
1269        }
1270        uint32_t muteWaitMs = setOutputDevice(output, newDevice, force);
1271
1272        // handle special case for sonification while in call
1273        if (isInCall()) {
1274            handleIncallSonification(stream, true, false);
1275        }
1276
1277        // apply volume rules for current stream and device if necessary
1278        checkAndSetVolume(stream,
1279                          mStreams[stream].getVolumeIndex(newDevice),
1280                          output,
1281                          newDevice);
1282
1283        // update the outputs if starting an output with a stream that can affect notification
1284        // routing
1285        handleNotificationRoutingForStream(stream);
1286
1287        // Automatically enable the remote submix input when output is started on a re routing mix
1288        // of type MIX_TYPE_RECORDERS
1289        if (audio_is_remote_submix_device(newDevice) && outputDesc->mPolicyMix != NULL &&
1290                outputDesc->mPolicyMix->mMixType == MIX_TYPE_RECORDERS) {
1291                setDeviceConnectionStateInt(AUDIO_DEVICE_IN_REMOTE_SUBMIX,
1292                        AUDIO_POLICY_DEVICE_STATE_AVAILABLE,
1293                        outputDesc->mPolicyMix->mRegistrationId);
1294        }
1295
1296        // force reevaluating accessibility routing when ringtone or alarm starts
1297        if (strategy == STRATEGY_SONIFICATION) {
1298            mpClientInterface->invalidateStream(AUDIO_STREAM_ACCESSIBILITY);
1299        }
1300
1301        if (waitMs > muteWaitMs) {
1302            usleep((waitMs - muteWaitMs) * 2 * 1000);
1303        }
1304    }
1305    return NO_ERROR;
1306}
1307
1308
1309status_t AudioPolicyManager::stopOutput(audio_io_handle_t output,
1310                                            audio_stream_type_t stream,
1311                                            audio_session_t session)
1312{
1313    ALOGV("stopOutput() output %d, stream %d, session %d", output, stream, session);
1314    ssize_t index = mOutputs.indexOfKey(output);
1315    if (index < 0) {
1316        ALOGW("stopOutput() unknown output %d", output);
1317        return BAD_VALUE;
1318    }
1319
1320    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(index);
1321
1322    // always handle stream stop, check which stream type is stopping
1323    handleEventForBeacon(stream == AUDIO_STREAM_TTS ? STOPPING_BEACON : STOPPING_OUTPUT);
1324
1325    // handle special case for sonification while in call
1326    if (isInCall()) {
1327        handleIncallSonification(stream, false, false);
1328    }
1329
1330    if (outputDesc->mRefCount[stream] > 0) {
1331        // decrement usage count of this stream on the output
1332        outputDesc->changeRefCount(stream, -1);
1333        // store time at which the stream was stopped - see isStreamActive()
1334        if (outputDesc->mRefCount[stream] == 0) {
1335            // Automatically disable the remote submix input when output is stopped on a
1336            // re routing mix of type MIX_TYPE_RECORDERS
1337            if (audio_is_remote_submix_device(outputDesc->mDevice) &&
1338                    outputDesc->mPolicyMix != NULL &&
1339                    outputDesc->mPolicyMix->mMixType == MIX_TYPE_RECORDERS) {
1340                setDeviceConnectionStateInt(AUDIO_DEVICE_IN_REMOTE_SUBMIX,
1341                        AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE,
1342                        outputDesc->mPolicyMix->mRegistrationId);
1343            }
1344
1345            outputDesc->mStopTime[stream] = systemTime();
1346            audio_devices_t newDevice = getNewOutputDevice(output, false /*fromCache*/);
1347            // delay the device switch by twice the latency because stopOutput() is executed when
1348            // the track stop() command is received and at that time the audio track buffer can
1349            // still contain data that needs to be drained. The latency only covers the audio HAL
1350            // and kernel buffers. Also the latency does not always include additional delay in the
1351            // audio path (audio DSP, CODEC ...)
1352            setOutputDevice(output, newDevice, false, outputDesc->mLatency*2);
1353
1354            // force restoring the device selection on other active outputs if it differs from the
1355            // one being selected for this output
1356            for (size_t i = 0; i < mOutputs.size(); i++) {
1357                audio_io_handle_t curOutput = mOutputs.keyAt(i);
1358                sp<AudioOutputDescriptor> desc = mOutputs.valueAt(i);
1359                if (curOutput != output &&
1360                        desc->isActive() &&
1361                        outputDesc->sharesHwModuleWith(desc) &&
1362                        (newDevice != desc->device())) {
1363                    setOutputDevice(curOutput,
1364                                    getNewOutputDevice(curOutput, false /*fromCache*/),
1365                                    true,
1366                                    outputDesc->mLatency*2);
1367                }
1368            }
1369            // update the outputs if stopping one with a stream that can affect notification routing
1370            handleNotificationRoutingForStream(stream);
1371        }
1372        return NO_ERROR;
1373    } else {
1374        ALOGW("stopOutput() refcount is already 0 for output %d", output);
1375        return INVALID_OPERATION;
1376    }
1377}
1378
1379void AudioPolicyManager::releaseOutput(audio_io_handle_t output,
1380                                       audio_stream_type_t stream __unused,
1381                                       audio_session_t session __unused)
1382{
1383    ALOGV("releaseOutput() %d", output);
1384    ssize_t index = mOutputs.indexOfKey(output);
1385    if (index < 0) {
1386        ALOGW("releaseOutput() releasing unknown output %d", output);
1387        return;
1388    }
1389
1390#ifdef AUDIO_POLICY_TEST
1391    int testIndex = testOutputIndex(output);
1392    if (testIndex != 0) {
1393        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(index);
1394        if (outputDesc->isActive()) {
1395            mpClientInterface->closeOutput(output);
1396            mOutputs.removeItem(output);
1397            mTestOutputs[testIndex] = 0;
1398        }
1399        return;
1400    }
1401#endif //AUDIO_POLICY_TEST
1402
1403    sp<AudioOutputDescriptor> desc = mOutputs.valueAt(index);
1404    if (desc->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) {
1405        if (desc->mDirectOpenCount <= 0) {
1406            ALOGW("releaseOutput() invalid open count %d for output %d",
1407                                                              desc->mDirectOpenCount, output);
1408            return;
1409        }
1410        if (--desc->mDirectOpenCount == 0) {
1411            closeOutput(output);
1412            // If effects where present on the output, audioflinger moved them to the primary
1413            // output by default: move them back to the appropriate output.
1414            audio_io_handle_t dstOutput = getOutputForEffect();
1415            if (dstOutput != mPrimaryOutput) {
1416                mpClientInterface->moveEffects(AUDIO_SESSION_OUTPUT_MIX, mPrimaryOutput, dstOutput);
1417            }
1418            mpClientInterface->onAudioPortListUpdate();
1419        }
1420    }
1421}
1422
1423
1424status_t AudioPolicyManager::getInputForAttr(const audio_attributes_t *attr,
1425                                             audio_io_handle_t *input,
1426                                             audio_session_t session,
1427                                             uint32_t samplingRate,
1428                                             audio_format_t format,
1429                                             audio_channel_mask_t channelMask,
1430                                             audio_input_flags_t flags,
1431                                             input_type_t *inputType)
1432{
1433    ALOGV("getInputForAttr() source %d, samplingRate %d, format %d, channelMask %x,"
1434            "session %d, flags %#x",
1435          attr->source, samplingRate, format, channelMask, session, flags);
1436
1437    *input = AUDIO_IO_HANDLE_NONE;
1438    *inputType = API_INPUT_INVALID;
1439    audio_devices_t device;
1440    // handle legacy remote submix case where the address was not always specified
1441    String8 address = String8("");
1442    bool isSoundTrigger = false;
1443    audio_source_t inputSource = attr->source;
1444    audio_source_t halInputSource;
1445    AudioMix *policyMix = NULL;
1446
1447    if (inputSource == AUDIO_SOURCE_DEFAULT) {
1448        inputSource = AUDIO_SOURCE_MIC;
1449    }
1450    halInputSource = inputSource;
1451
1452    if (inputSource == AUDIO_SOURCE_REMOTE_SUBMIX &&
1453            strncmp(attr->tags, "addr=", strlen("addr=")) == 0) {
1454        device = AUDIO_DEVICE_IN_REMOTE_SUBMIX;
1455        address = String8(attr->tags + strlen("addr="));
1456        ssize_t index = mPolicyMixes.indexOfKey(address);
1457        if (index < 0) {
1458            ALOGW("getInputForAttr() no policy for address %s", address.string());
1459            return BAD_VALUE;
1460        }
1461        if (mPolicyMixes[index]->mMix.mMixType != MIX_TYPE_PLAYERS) {
1462            ALOGW("getInputForAttr() bad policy mix type for address %s", address.string());
1463            return BAD_VALUE;
1464        }
1465        policyMix = &mPolicyMixes[index]->mMix;
1466        *inputType = API_INPUT_MIX_EXT_POLICY_REROUTE;
1467    } else {
1468        device = getDeviceAndMixForInputSource(inputSource, &policyMix);
1469        if (device == AUDIO_DEVICE_NONE) {
1470            ALOGW("getInputForAttr() could not find device for source %d", inputSource);
1471            return BAD_VALUE;
1472        }
1473        if (policyMix != NULL) {
1474            address = policyMix->mRegistrationId;
1475            if (policyMix->mMixType == MIX_TYPE_RECORDERS) {
1476                // there is an external policy, but this input is attached to a mix of recorders,
1477                // meaning it receives audio injected into the framework, so the recorder doesn't
1478                // know about it and is therefore considered "legacy"
1479                *inputType = API_INPUT_LEGACY;
1480            } else {
1481                // recording a mix of players defined by an external policy, we're rerouting for
1482                // an external policy
1483                *inputType = API_INPUT_MIX_EXT_POLICY_REROUTE;
1484            }
1485        } else if (audio_is_remote_submix_device(device)) {
1486            address = String8("0");
1487            *inputType = API_INPUT_MIX_CAPTURE;
1488        } else {
1489            *inputType = API_INPUT_LEGACY;
1490        }
1491        // adapt channel selection to input source
1492        switch (inputSource) {
1493        case AUDIO_SOURCE_VOICE_UPLINK:
1494            channelMask = AUDIO_CHANNEL_IN_VOICE_UPLINK;
1495            break;
1496        case AUDIO_SOURCE_VOICE_DOWNLINK:
1497            channelMask = AUDIO_CHANNEL_IN_VOICE_DNLINK;
1498            break;
1499        case AUDIO_SOURCE_VOICE_CALL:
1500            channelMask = AUDIO_CHANNEL_IN_VOICE_UPLINK | AUDIO_CHANNEL_IN_VOICE_DNLINK;
1501            break;
1502        default:
1503            break;
1504        }
1505        if (inputSource == AUDIO_SOURCE_HOTWORD) {
1506            ssize_t index = mSoundTriggerSessions.indexOfKey(session);
1507            if (index >= 0) {
1508                *input = mSoundTriggerSessions.valueFor(session);
1509                isSoundTrigger = true;
1510                flags = (audio_input_flags_t)(flags | AUDIO_INPUT_FLAG_HW_HOTWORD);
1511                ALOGV("SoundTrigger capture on session %d input %d", session, *input);
1512            } else {
1513                halInputSource = AUDIO_SOURCE_VOICE_RECOGNITION;
1514            }
1515        }
1516    }
1517
1518    sp<IOProfile> profile = getInputProfile(device, address,
1519                                            samplingRate, format, channelMask,
1520                                            flags);
1521    if (profile == 0) {
1522        //retry without flags
1523        audio_input_flags_t log_flags = flags;
1524        flags = AUDIO_INPUT_FLAG_NONE;
1525        profile = getInputProfile(device, address,
1526                                  samplingRate, format, channelMask,
1527                                  flags);
1528        if (profile == 0) {
1529            ALOGW("getInputForAttr() could not find profile for device 0x%X, samplingRate %u,"
1530                    "format %#x, channelMask 0x%X, flags %#x",
1531                    device, samplingRate, format, channelMask, log_flags);
1532            return BAD_VALUE;
1533        }
1534    }
1535
1536    if (profile->mModule->mHandle == 0) {
1537        ALOGE("getInputForAttr(): HW module %s not opened", profile->mModule->mName);
1538        return NO_INIT;
1539    }
1540
1541    audio_config_t config = AUDIO_CONFIG_INITIALIZER;
1542    config.sample_rate = samplingRate;
1543    config.channel_mask = channelMask;
1544    config.format = format;
1545
1546    status_t status = mpClientInterface->openInput(profile->mModule->mHandle,
1547                                                   input,
1548                                                   &config,
1549                                                   &device,
1550                                                   address,
1551                                                   halInputSource,
1552                                                   flags);
1553
1554    // only accept input with the exact requested set of parameters
1555    if (status != NO_ERROR || *input == AUDIO_IO_HANDLE_NONE ||
1556        (samplingRate != config.sample_rate) ||
1557        (format != config.format) ||
1558        (channelMask != config.channel_mask)) {
1559        ALOGW("getInputForAttr() failed opening input: samplingRate %d, format %d, channelMask %x",
1560                samplingRate, format, channelMask);
1561        if (*input != AUDIO_IO_HANDLE_NONE) {
1562            mpClientInterface->closeInput(*input);
1563        }
1564        return BAD_VALUE;
1565    }
1566
1567    sp<AudioInputDescriptor> inputDesc = new AudioInputDescriptor(profile);
1568    inputDesc->mInputSource = inputSource;
1569    inputDesc->mRefCount = 0;
1570    inputDesc->mOpenRefCount = 1;
1571    inputDesc->mSamplingRate = samplingRate;
1572    inputDesc->mFormat = format;
1573    inputDesc->mChannelMask = channelMask;
1574    inputDesc->mDevice = device;
1575    inputDesc->mSessions.add(session);
1576    inputDesc->mIsSoundTrigger = isSoundTrigger;
1577    inputDesc->mPolicyMix = policyMix;
1578
1579    ALOGV("getInputForAttr() returns input type = %d", inputType);
1580
1581    addInput(*input, inputDesc);
1582    mpClientInterface->onAudioPortListUpdate();
1583    return NO_ERROR;
1584}
1585
1586status_t AudioPolicyManager::startInput(audio_io_handle_t input,
1587                                        audio_session_t session)
1588{
1589    ALOGV("startInput() input %d", input);
1590    ssize_t index = mInputs.indexOfKey(input);
1591    if (index < 0) {
1592        ALOGW("startInput() unknown input %d", input);
1593        return BAD_VALUE;
1594    }
1595    sp<AudioInputDescriptor> inputDesc = mInputs.valueAt(index);
1596
1597    index = inputDesc->mSessions.indexOf(session);
1598    if (index < 0) {
1599        ALOGW("startInput() unknown session %d on input %d", session, input);
1600        return BAD_VALUE;
1601    }
1602
1603    // virtual input devices are compatible with other input devices
1604    if (!isVirtualInputDevice(inputDesc->mDevice)) {
1605
1606        // for a non-virtual input device, check if there is another (non-virtual) active input
1607        audio_io_handle_t activeInput = getActiveInput();
1608        if (activeInput != 0 && activeInput != input) {
1609
1610            // If the already active input uses AUDIO_SOURCE_HOTWORD then it is closed,
1611            // otherwise the active input continues and the new input cannot be started.
1612            sp<AudioInputDescriptor> activeDesc = mInputs.valueFor(activeInput);
1613            if (activeDesc->mInputSource == AUDIO_SOURCE_HOTWORD) {
1614                ALOGW("startInput(%d) preempting low-priority input %d", input, activeInput);
1615                stopInput(activeInput, activeDesc->mSessions.itemAt(0));
1616                releaseInput(activeInput, activeDesc->mSessions.itemAt(0));
1617            } else {
1618                ALOGE("startInput(%d) failed: other input %d already started", input, activeInput);
1619                return INVALID_OPERATION;
1620            }
1621        }
1622    }
1623
1624    if (inputDesc->mRefCount == 0) {
1625        if (activeInputsCount() == 0) {
1626            SoundTrigger::setCaptureState(true);
1627        }
1628        setInputDevice(input, getNewInputDevice(input), true /* force */);
1629
1630        // automatically enable the remote submix output when input is started if not
1631        // used by a policy mix of type MIX_TYPE_RECORDERS
1632        // For remote submix (a virtual device), we open only one input per capture request.
1633        if (audio_is_remote_submix_device(inputDesc->mDevice)) {
1634            String8 address = String8("");
1635            if (inputDesc->mPolicyMix == NULL) {
1636                address = String8("0");
1637            } else if (inputDesc->mPolicyMix->mMixType == MIX_TYPE_PLAYERS) {
1638                address = inputDesc->mPolicyMix->mRegistrationId;
1639            }
1640            if (address != "") {
1641                setDeviceConnectionStateInt(AUDIO_DEVICE_OUT_REMOTE_SUBMIX,
1642                        AUDIO_POLICY_DEVICE_STATE_AVAILABLE,
1643                        address);
1644            }
1645        }
1646    }
1647
1648    ALOGV("AudioPolicyManager::startInput() input source = %d", inputDesc->mInputSource);
1649
1650    inputDesc->mRefCount++;
1651    return NO_ERROR;
1652}
1653
1654status_t AudioPolicyManager::stopInput(audio_io_handle_t input,
1655                                       audio_session_t session)
1656{
1657    ALOGV("stopInput() input %d", input);
1658    ssize_t index = mInputs.indexOfKey(input);
1659    if (index < 0) {
1660        ALOGW("stopInput() unknown input %d", input);
1661        return BAD_VALUE;
1662    }
1663    sp<AudioInputDescriptor> inputDesc = mInputs.valueAt(index);
1664
1665    index = inputDesc->mSessions.indexOf(session);
1666    if (index < 0) {
1667        ALOGW("stopInput() unknown session %d on input %d", session, input);
1668        return BAD_VALUE;
1669    }
1670
1671    if (inputDesc->mRefCount == 0) {
1672        ALOGW("stopInput() input %d already stopped", input);
1673        return INVALID_OPERATION;
1674    }
1675
1676    inputDesc->mRefCount--;
1677    if (inputDesc->mRefCount == 0) {
1678
1679        // automatically disable the remote submix output when input is stopped if not
1680        // used by a policy mix of type MIX_TYPE_RECORDERS
1681        if (audio_is_remote_submix_device(inputDesc->mDevice)) {
1682            String8 address = String8("");
1683            if (inputDesc->mPolicyMix == NULL) {
1684                address = String8("0");
1685            } else if (inputDesc->mPolicyMix->mMixType == MIX_TYPE_PLAYERS) {
1686                address = inputDesc->mPolicyMix->mRegistrationId;
1687            }
1688            if (address != "") {
1689                setDeviceConnectionStateInt(AUDIO_DEVICE_OUT_REMOTE_SUBMIX,
1690                                         AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE,
1691                                         address);
1692            }
1693        }
1694
1695        resetInputDevice(input);
1696
1697        if (activeInputsCount() == 0) {
1698            SoundTrigger::setCaptureState(false);
1699        }
1700    }
1701    return NO_ERROR;
1702}
1703
1704void AudioPolicyManager::releaseInput(audio_io_handle_t input,
1705                                      audio_session_t session)
1706{
1707    ALOGV("releaseInput() %d", input);
1708    ssize_t index = mInputs.indexOfKey(input);
1709    if (index < 0) {
1710        ALOGW("releaseInput() releasing unknown input %d", input);
1711        return;
1712    }
1713    sp<AudioInputDescriptor> inputDesc = mInputs.valueAt(index);
1714    ALOG_ASSERT(inputDesc != 0);
1715
1716    index = inputDesc->mSessions.indexOf(session);
1717    if (index < 0) {
1718        ALOGW("releaseInput() unknown session %d on input %d", session, input);
1719        return;
1720    }
1721    inputDesc->mSessions.remove(session);
1722    if (inputDesc->mOpenRefCount == 0) {
1723        ALOGW("releaseInput() invalid open ref count %d", inputDesc->mOpenRefCount);
1724        return;
1725    }
1726    inputDesc->mOpenRefCount--;
1727    if (inputDesc->mOpenRefCount > 0) {
1728        ALOGV("releaseInput() exit > 0");
1729        return;
1730    }
1731
1732    closeInput(input);
1733    mpClientInterface->onAudioPortListUpdate();
1734    ALOGV("releaseInput() exit");
1735}
1736
1737void AudioPolicyManager::closeAllInputs() {
1738    bool patchRemoved = false;
1739
1740    for(size_t input_index = 0; input_index < mInputs.size(); input_index++) {
1741        sp<AudioInputDescriptor> inputDesc = mInputs.valueAt(input_index);
1742        ssize_t patch_index = mAudioPatches.indexOfKey(inputDesc->mPatchHandle);
1743        if (patch_index >= 0) {
1744            sp<AudioPatch> patchDesc = mAudioPatches.valueAt(patch_index);
1745            status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, 0);
1746            mAudioPatches.removeItemsAt(patch_index);
1747            patchRemoved = true;
1748        }
1749        mpClientInterface->closeInput(mInputs.keyAt(input_index));
1750    }
1751    mInputs.clear();
1752    nextAudioPortGeneration();
1753
1754    if (patchRemoved) {
1755        mpClientInterface->onAudioPatchListUpdate();
1756    }
1757}
1758
1759void AudioPolicyManager::initStreamVolume(audio_stream_type_t stream,
1760                                            int indexMin,
1761                                            int indexMax)
1762{
1763    ALOGV("initStreamVolume() stream %d, min %d, max %d", stream , indexMin, indexMax);
1764    if (indexMin < 0 || indexMin >= indexMax) {
1765        ALOGW("initStreamVolume() invalid index limits for stream %d, min %d, max %d", stream , indexMin, indexMax);
1766        return;
1767    }
1768    mStreams[stream].mIndexMin = indexMin;
1769    mStreams[stream].mIndexMax = indexMax;
1770    //FIXME: AUDIO_STREAM_ACCESSIBILITY volume follows AUDIO_STREAM_MUSIC for now
1771    if (stream == AUDIO_STREAM_MUSIC) {
1772        mStreams[AUDIO_STREAM_ACCESSIBILITY].mIndexMin = indexMin;
1773        mStreams[AUDIO_STREAM_ACCESSIBILITY].mIndexMax = indexMax;
1774    }
1775}
1776
1777status_t AudioPolicyManager::setStreamVolumeIndex(audio_stream_type_t stream,
1778                                                      int index,
1779                                                      audio_devices_t device)
1780{
1781
1782    if ((index < mStreams[stream].mIndexMin) || (index > mStreams[stream].mIndexMax)) {
1783        return BAD_VALUE;
1784    }
1785    if (!audio_is_output_device(device)) {
1786        return BAD_VALUE;
1787    }
1788
1789    // Force max volume if stream cannot be muted
1790    if (!mStreams[stream].mCanBeMuted) index = mStreams[stream].mIndexMax;
1791
1792    ALOGV("setStreamVolumeIndex() stream %d, device %04x, index %d",
1793          stream, device, index);
1794
1795    // if device is AUDIO_DEVICE_OUT_DEFAULT set default value and
1796    // clear all device specific values
1797    if (device == AUDIO_DEVICE_OUT_DEFAULT) {
1798        mStreams[stream].mIndexCur.clear();
1799    }
1800    mStreams[stream].mIndexCur.add(device, index);
1801
1802    // update volume on all outputs whose current device is also selected by the same
1803    // strategy as the device specified by the caller
1804    audio_devices_t strategyDevice = getDeviceForStrategy(getStrategy(stream), true /*fromCache*/);
1805
1806
1807    //FIXME: AUDIO_STREAM_ACCESSIBILITY volume follows AUDIO_STREAM_MUSIC for now
1808    audio_devices_t accessibilityDevice = AUDIO_DEVICE_NONE;
1809    if (stream == AUDIO_STREAM_MUSIC) {
1810        mStreams[AUDIO_STREAM_ACCESSIBILITY].mIndexCur.add(device, index);
1811        accessibilityDevice = getDeviceForStrategy(STRATEGY_ACCESSIBILITY, true /*fromCache*/);
1812    }
1813    if ((device != AUDIO_DEVICE_OUT_DEFAULT) &&
1814            (device & (strategyDevice | accessibilityDevice)) == 0) {
1815        return NO_ERROR;
1816    }
1817    status_t status = NO_ERROR;
1818    for (size_t i = 0; i < mOutputs.size(); i++) {
1819        audio_devices_t curDevice =
1820                getDeviceForVolume(mOutputs.valueAt(i)->device());
1821        if ((device == AUDIO_DEVICE_OUT_DEFAULT) || ((curDevice & strategyDevice) != 0)) {
1822            status_t volStatus = checkAndSetVolume(stream, index, mOutputs.keyAt(i), curDevice);
1823            if (volStatus != NO_ERROR) {
1824                status = volStatus;
1825            }
1826        }
1827        if ((device == AUDIO_DEVICE_OUT_DEFAULT) || ((curDevice & accessibilityDevice) != 0)) {
1828            status_t volStatus = checkAndSetVolume(AUDIO_STREAM_ACCESSIBILITY,
1829                                                   index, mOutputs.keyAt(i), curDevice);
1830        }
1831    }
1832    return status;
1833}
1834
1835status_t AudioPolicyManager::getStreamVolumeIndex(audio_stream_type_t stream,
1836                                                      int *index,
1837                                                      audio_devices_t device)
1838{
1839    if (index == NULL) {
1840        return BAD_VALUE;
1841    }
1842    if (!audio_is_output_device(device)) {
1843        return BAD_VALUE;
1844    }
1845    // if device is AUDIO_DEVICE_OUT_DEFAULT, return volume for device corresponding to
1846    // the strategy the stream belongs to.
1847    if (device == AUDIO_DEVICE_OUT_DEFAULT) {
1848        device = getDeviceForStrategy(getStrategy(stream), true /*fromCache*/);
1849    }
1850    device = getDeviceForVolume(device);
1851
1852    *index =  mStreams[stream].getVolumeIndex(device);
1853    ALOGV("getStreamVolumeIndex() stream %d device %08x index %d", stream, device, *index);
1854    return NO_ERROR;
1855}
1856
1857audio_io_handle_t AudioPolicyManager::selectOutputForEffects(
1858                                            const SortedVector<audio_io_handle_t>& outputs)
1859{
1860    // select one output among several suitable for global effects.
1861    // The priority is as follows:
1862    // 1: An offloaded output. If the effect ends up not being offloadable,
1863    //    AudioFlinger will invalidate the track and the offloaded output
1864    //    will be closed causing the effect to be moved to a PCM output.
1865    // 2: A deep buffer output
1866    // 3: the first output in the list
1867
1868    if (outputs.size() == 0) {
1869        return 0;
1870    }
1871
1872    audio_io_handle_t outputOffloaded = 0;
1873    audio_io_handle_t outputDeepBuffer = 0;
1874
1875    for (size_t i = 0; i < outputs.size(); i++) {
1876        sp<AudioOutputDescriptor> desc = mOutputs.valueFor(outputs[i]);
1877        ALOGV("selectOutputForEffects outputs[%zu] flags %x", i, desc->mFlags);
1878        if ((desc->mFlags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0) {
1879            outputOffloaded = outputs[i];
1880        }
1881        if ((desc->mFlags & AUDIO_OUTPUT_FLAG_DEEP_BUFFER) != 0) {
1882            outputDeepBuffer = outputs[i];
1883        }
1884    }
1885
1886    ALOGV("selectOutputForEffects outputOffloaded %d outputDeepBuffer %d",
1887          outputOffloaded, outputDeepBuffer);
1888    if (outputOffloaded != 0) {
1889        return outputOffloaded;
1890    }
1891    if (outputDeepBuffer != 0) {
1892        return outputDeepBuffer;
1893    }
1894
1895    return outputs[0];
1896}
1897
1898audio_io_handle_t AudioPolicyManager::getOutputForEffect(const effect_descriptor_t *desc)
1899{
1900    // apply simple rule where global effects are attached to the same output as MUSIC streams
1901
1902    routing_strategy strategy = getStrategy(AUDIO_STREAM_MUSIC);
1903    audio_devices_t device = getDeviceForStrategy(strategy, false /*fromCache*/);
1904    SortedVector<audio_io_handle_t> dstOutputs = getOutputsForDevice(device, mOutputs);
1905
1906    audio_io_handle_t output = selectOutputForEffects(dstOutputs);
1907    ALOGV("getOutputForEffect() got output %d for fx %s flags %x",
1908          output, (desc == NULL) ? "unspecified" : desc->name,  (desc == NULL) ? 0 : desc->flags);
1909
1910    return output;
1911}
1912
1913status_t AudioPolicyManager::registerEffect(const effect_descriptor_t *desc,
1914                                audio_io_handle_t io,
1915                                uint32_t strategy,
1916                                int session,
1917                                int id)
1918{
1919    ssize_t index = mOutputs.indexOfKey(io);
1920    if (index < 0) {
1921        index = mInputs.indexOfKey(io);
1922        if (index < 0) {
1923            ALOGW("registerEffect() unknown io %d", io);
1924            return INVALID_OPERATION;
1925        }
1926    }
1927
1928    if (mTotalEffectsMemory + desc->memoryUsage > getMaxEffectsMemory()) {
1929        ALOGW("registerEffect() memory limit exceeded for Fx %s, Memory %d KB",
1930                desc->name, desc->memoryUsage);
1931        return INVALID_OPERATION;
1932    }
1933    mTotalEffectsMemory += desc->memoryUsage;
1934    ALOGV("registerEffect() effect %s, io %d, strategy %d session %d id %d",
1935            desc->name, io, strategy, session, id);
1936    ALOGV("registerEffect() memory %d, total memory %d", desc->memoryUsage, mTotalEffectsMemory);
1937
1938    sp<EffectDescriptor> effectDesc = new EffectDescriptor();
1939    memcpy (&effectDesc->mDesc, desc, sizeof(effect_descriptor_t));
1940    effectDesc->mIo = io;
1941    effectDesc->mStrategy = (routing_strategy)strategy;
1942    effectDesc->mSession = session;
1943    effectDesc->mEnabled = false;
1944
1945    mEffects.add(id, effectDesc);
1946
1947    return NO_ERROR;
1948}
1949
1950status_t AudioPolicyManager::unregisterEffect(int id)
1951{
1952    ssize_t index = mEffects.indexOfKey(id);
1953    if (index < 0) {
1954        ALOGW("unregisterEffect() unknown effect ID %d", id);
1955        return INVALID_OPERATION;
1956    }
1957
1958    sp<EffectDescriptor> effectDesc = mEffects.valueAt(index);
1959
1960    setEffectEnabled(effectDesc, false);
1961
1962    if (mTotalEffectsMemory < effectDesc->mDesc.memoryUsage) {
1963        ALOGW("unregisterEffect() memory %d too big for total %d",
1964                effectDesc->mDesc.memoryUsage, mTotalEffectsMemory);
1965        effectDesc->mDesc.memoryUsage = mTotalEffectsMemory;
1966    }
1967    mTotalEffectsMemory -= effectDesc->mDesc.memoryUsage;
1968    ALOGV("unregisterEffect() effect %s, ID %d, memory %d total memory %d",
1969            effectDesc->mDesc.name, id, effectDesc->mDesc.memoryUsage, mTotalEffectsMemory);
1970
1971    mEffects.removeItem(id);
1972
1973    return NO_ERROR;
1974}
1975
1976status_t AudioPolicyManager::setEffectEnabled(int id, bool enabled)
1977{
1978    ssize_t index = mEffects.indexOfKey(id);
1979    if (index < 0) {
1980        ALOGW("unregisterEffect() unknown effect ID %d", id);
1981        return INVALID_OPERATION;
1982    }
1983
1984    return setEffectEnabled(mEffects.valueAt(index), enabled);
1985}
1986
1987status_t AudioPolicyManager::setEffectEnabled(const sp<EffectDescriptor>& effectDesc, bool enabled)
1988{
1989    if (enabled == effectDesc->mEnabled) {
1990        ALOGV("setEffectEnabled(%s) effect already %s",
1991             enabled?"true":"false", enabled?"enabled":"disabled");
1992        return INVALID_OPERATION;
1993    }
1994
1995    if (enabled) {
1996        if (mTotalEffectsCpuLoad + effectDesc->mDesc.cpuLoad > getMaxEffectsCpuLoad()) {
1997            ALOGW("setEffectEnabled(true) CPU Load limit exceeded for Fx %s, CPU %f MIPS",
1998                 effectDesc->mDesc.name, (float)effectDesc->mDesc.cpuLoad/10);
1999            return INVALID_OPERATION;
2000        }
2001        mTotalEffectsCpuLoad += effectDesc->mDesc.cpuLoad;
2002        ALOGV("setEffectEnabled(true) total CPU %d", mTotalEffectsCpuLoad);
2003    } else {
2004        if (mTotalEffectsCpuLoad < effectDesc->mDesc.cpuLoad) {
2005            ALOGW("setEffectEnabled(false) CPU load %d too high for total %d",
2006                    effectDesc->mDesc.cpuLoad, mTotalEffectsCpuLoad);
2007            effectDesc->mDesc.cpuLoad = mTotalEffectsCpuLoad;
2008        }
2009        mTotalEffectsCpuLoad -= effectDesc->mDesc.cpuLoad;
2010        ALOGV("setEffectEnabled(false) total CPU %d", mTotalEffectsCpuLoad);
2011    }
2012    effectDesc->mEnabled = enabled;
2013    return NO_ERROR;
2014}
2015
2016bool AudioPolicyManager::isNonOffloadableEffectEnabled()
2017{
2018    for (size_t i = 0; i < mEffects.size(); i++) {
2019        sp<EffectDescriptor> effectDesc = mEffects.valueAt(i);
2020        if (effectDesc->mEnabled && (effectDesc->mStrategy == STRATEGY_MEDIA) &&
2021                ((effectDesc->mDesc.flags & EFFECT_FLAG_OFFLOAD_SUPPORTED) == 0)) {
2022            ALOGV("isNonOffloadableEffectEnabled() non offloadable effect %s enabled on session %d",
2023                  effectDesc->mDesc.name, effectDesc->mSession);
2024            return true;
2025        }
2026    }
2027    return false;
2028}
2029
2030bool AudioPolicyManager::isStreamActive(audio_stream_type_t stream, uint32_t inPastMs) const
2031{
2032    nsecs_t sysTime = systemTime();
2033    for (size_t i = 0; i < mOutputs.size(); i++) {
2034        const sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(i);
2035        if (outputDesc->isStreamActive(stream, inPastMs, sysTime)) {
2036            return true;
2037        }
2038    }
2039    return false;
2040}
2041
2042bool AudioPolicyManager::isStreamActiveRemotely(audio_stream_type_t stream,
2043                                                    uint32_t inPastMs) const
2044{
2045    nsecs_t sysTime = systemTime();
2046    for (size_t i = 0; i < mOutputs.size(); i++) {
2047        const sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(i);
2048        if (((outputDesc->device() & APM_AUDIO_OUT_DEVICE_REMOTE_ALL) != 0) &&
2049                outputDesc->isStreamActive(stream, inPastMs, sysTime)) {
2050            // do not consider re routing (when the output is going to a dynamic policy)
2051            // as "remote playback"
2052            if (outputDesc->mPolicyMix == NULL) {
2053                return true;
2054            }
2055        }
2056    }
2057    return false;
2058}
2059
2060bool AudioPolicyManager::isSourceActive(audio_source_t source) const
2061{
2062    for (size_t i = 0; i < mInputs.size(); i++) {
2063        const sp<AudioInputDescriptor>  inputDescriptor = mInputs.valueAt(i);
2064        if (inputDescriptor->mRefCount == 0) {
2065            continue;
2066        }
2067        if (inputDescriptor->mInputSource == (int)source) {
2068            return true;
2069        }
2070        // AUDIO_SOURCE_HOTWORD is equivalent to AUDIO_SOURCE_VOICE_RECOGNITION only if it
2071        // corresponds to an active capture triggered by a hardware hotword recognition
2072        if ((source == AUDIO_SOURCE_VOICE_RECOGNITION) &&
2073                 (inputDescriptor->mInputSource == AUDIO_SOURCE_HOTWORD)) {
2074            // FIXME: we should not assume that the first session is the active one and keep
2075            // activity count per session. Same in startInput().
2076            ssize_t index = mSoundTriggerSessions.indexOfKey(inputDescriptor->mSessions.itemAt(0));
2077            if (index >= 0) {
2078                return true;
2079            }
2080        }
2081    }
2082    return false;
2083}
2084
2085// Register a list of custom mixes with their attributes and format.
2086// When a mix is registered, corresponding input and output profiles are
2087// added to the remote submix hw module. The profile contains only the
2088// parameters (sampling rate, format...) specified by the mix.
2089// The corresponding input remote submix device is also connected.
2090//
2091// When a remote submix device is connected, the address is checked to select the
2092// appropriate profile and the corresponding input or output stream is opened.
2093//
2094// When capture starts, getInputForAttr() will:
2095//  - 1 look for a mix matching the address passed in attribtutes tags if any
2096//  - 2 if none found, getDeviceForInputSource() will:
2097//     - 2.1 look for a mix matching the attributes source
2098//     - 2.2 if none found, default to device selection by policy rules
2099// At this time, the corresponding output remote submix device is also connected
2100// and active playback use cases can be transferred to this mix if needed when reconnecting
2101// after AudioTracks are invalidated
2102//
2103// When playback starts, getOutputForAttr() will:
2104//  - 1 look for a mix matching the address passed in attribtutes tags if any
2105//  - 2 if none found, look for a mix matching the attributes usage
2106//  - 3 if none found, default to device and output selection by policy rules.
2107
2108status_t AudioPolicyManager::registerPolicyMixes(Vector<AudioMix> mixes)
2109{
2110    sp<HwModule> module;
2111    for (size_t i = 0; i < mHwModules.size(); i++) {
2112        if (strcmp(AUDIO_HARDWARE_MODULE_ID_REMOTE_SUBMIX, mHwModules[i]->mName) == 0 &&
2113                mHwModules[i]->mHandle != 0) {
2114            module = mHwModules[i];
2115            break;
2116        }
2117    }
2118
2119    if (module == 0) {
2120        return INVALID_OPERATION;
2121    }
2122
2123    ALOGV("registerPolicyMixes() num mixes %d", mixes.size());
2124
2125    for (size_t i = 0; i < mixes.size(); i++) {
2126        String8 address = mixes[i].mRegistrationId;
2127        ssize_t index = mPolicyMixes.indexOfKey(address);
2128        if (index >= 0) {
2129            ALOGE("registerPolicyMixes(): mix for address %s already registered", address.string());
2130            continue;
2131        }
2132        audio_config_t outputConfig = mixes[i].mFormat;
2133        audio_config_t inputConfig = mixes[i].mFormat;
2134        // NOTE: audio flinger mixer does not support mono output: configure remote submix HAL in
2135        // stereo and let audio flinger do the channel conversion if needed.
2136        outputConfig.channel_mask = AUDIO_CHANNEL_OUT_STEREO;
2137        inputConfig.channel_mask = AUDIO_CHANNEL_IN_STEREO;
2138        module->addOutputProfile(address, &outputConfig,
2139                                 AUDIO_DEVICE_OUT_REMOTE_SUBMIX, address);
2140        module->addInputProfile(address, &inputConfig,
2141                                 AUDIO_DEVICE_IN_REMOTE_SUBMIX, address);
2142        sp<AudioPolicyMix> policyMix = new AudioPolicyMix();
2143        policyMix->mMix = mixes[i];
2144        mPolicyMixes.add(address, policyMix);
2145        if (mixes[i].mMixType == MIX_TYPE_PLAYERS) {
2146            setDeviceConnectionStateInt(AUDIO_DEVICE_IN_REMOTE_SUBMIX,
2147                                     AUDIO_POLICY_DEVICE_STATE_AVAILABLE,
2148                                     address.string());
2149        } else {
2150            setDeviceConnectionStateInt(AUDIO_DEVICE_OUT_REMOTE_SUBMIX,
2151                                     AUDIO_POLICY_DEVICE_STATE_AVAILABLE,
2152                                     address.string());
2153        }
2154    }
2155    return NO_ERROR;
2156}
2157
2158status_t AudioPolicyManager::unregisterPolicyMixes(Vector<AudioMix> mixes)
2159{
2160    sp<HwModule> module;
2161    for (size_t i = 0; i < mHwModules.size(); i++) {
2162        if (strcmp(AUDIO_HARDWARE_MODULE_ID_REMOTE_SUBMIX, mHwModules[i]->mName) == 0 &&
2163                mHwModules[i]->mHandle != 0) {
2164            module = mHwModules[i];
2165            break;
2166        }
2167    }
2168
2169    if (module == 0) {
2170        return INVALID_OPERATION;
2171    }
2172
2173    ALOGV("unregisterPolicyMixes() num mixes %d", mixes.size());
2174
2175    for (size_t i = 0; i < mixes.size(); i++) {
2176        String8 address = mixes[i].mRegistrationId;
2177        ssize_t index = mPolicyMixes.indexOfKey(address);
2178        if (index < 0) {
2179            ALOGE("unregisterPolicyMixes(): mix for address %s not registered", address.string());
2180            continue;
2181        }
2182
2183        mPolicyMixes.removeItemsAt(index);
2184
2185        if (getDeviceConnectionState(AUDIO_DEVICE_IN_REMOTE_SUBMIX, address.string()) ==
2186                                             AUDIO_POLICY_DEVICE_STATE_AVAILABLE)
2187        {
2188            setDeviceConnectionStateInt(AUDIO_DEVICE_IN_REMOTE_SUBMIX,
2189                                     AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE,
2190                                     address.string());
2191        }
2192
2193        if (getDeviceConnectionState(AUDIO_DEVICE_OUT_REMOTE_SUBMIX, address.string()) ==
2194                                             AUDIO_POLICY_DEVICE_STATE_AVAILABLE)
2195        {
2196            setDeviceConnectionStateInt(AUDIO_DEVICE_OUT_REMOTE_SUBMIX,
2197                                     AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE,
2198                                     address.string());
2199        }
2200        module->removeOutputProfile(address);
2201        module->removeInputProfile(address);
2202    }
2203    return NO_ERROR;
2204}
2205
2206
2207status_t AudioPolicyManager::dump(int fd)
2208{
2209    const size_t SIZE = 256;
2210    char buffer[SIZE];
2211    String8 result;
2212
2213    snprintf(buffer, SIZE, "\nAudioPolicyManager Dump: %p\n", this);
2214    result.append(buffer);
2215
2216    snprintf(buffer, SIZE, " Primary Output: %d\n", mPrimaryOutput);
2217    result.append(buffer);
2218    snprintf(buffer, SIZE, " Phone state: %d\n", mPhoneState);
2219    result.append(buffer);
2220    snprintf(buffer, SIZE, " Force use for communications %d\n",
2221             mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION]);
2222    result.append(buffer);
2223    snprintf(buffer, SIZE, " Force use for media %d\n", mForceUse[AUDIO_POLICY_FORCE_FOR_MEDIA]);
2224    result.append(buffer);
2225    snprintf(buffer, SIZE, " Force use for record %d\n", mForceUse[AUDIO_POLICY_FORCE_FOR_RECORD]);
2226    result.append(buffer);
2227    snprintf(buffer, SIZE, " Force use for dock %d\n", mForceUse[AUDIO_POLICY_FORCE_FOR_DOCK]);
2228    result.append(buffer);
2229    snprintf(buffer, SIZE, " Force use for system %d\n", mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM]);
2230    result.append(buffer);
2231    snprintf(buffer, SIZE, " Force use for hdmi system audio %d\n",
2232            mForceUse[AUDIO_POLICY_FORCE_FOR_HDMI_SYSTEM_AUDIO]);
2233    result.append(buffer);
2234
2235    snprintf(buffer, SIZE, " Available output devices:\n");
2236    result.append(buffer);
2237    write(fd, result.string(), result.size());
2238    for (size_t i = 0; i < mAvailableOutputDevices.size(); i++) {
2239        mAvailableOutputDevices[i]->dump(fd, 2, i);
2240    }
2241    snprintf(buffer, SIZE, "\n Available input devices:\n");
2242    write(fd, buffer, strlen(buffer));
2243    for (size_t i = 0; i < mAvailableInputDevices.size(); i++) {
2244        mAvailableInputDevices[i]->dump(fd, 2, i);
2245    }
2246
2247    snprintf(buffer, SIZE, "\nHW Modules dump:\n");
2248    write(fd, buffer, strlen(buffer));
2249    for (size_t i = 0; i < mHwModules.size(); i++) {
2250        snprintf(buffer, SIZE, "- HW Module %zu:\n", i + 1);
2251        write(fd, buffer, strlen(buffer));
2252        mHwModules[i]->dump(fd);
2253    }
2254
2255    snprintf(buffer, SIZE, "\nOutputs dump:\n");
2256    write(fd, buffer, strlen(buffer));
2257    for (size_t i = 0; i < mOutputs.size(); i++) {
2258        snprintf(buffer, SIZE, "- Output %d dump:\n", mOutputs.keyAt(i));
2259        write(fd, buffer, strlen(buffer));
2260        mOutputs.valueAt(i)->dump(fd);
2261    }
2262
2263    snprintf(buffer, SIZE, "\nInputs dump:\n");
2264    write(fd, buffer, strlen(buffer));
2265    for (size_t i = 0; i < mInputs.size(); i++) {
2266        snprintf(buffer, SIZE, "- Input %d dump:\n", mInputs.keyAt(i));
2267        write(fd, buffer, strlen(buffer));
2268        mInputs.valueAt(i)->dump(fd);
2269    }
2270
2271    snprintf(buffer, SIZE, "\nStreams dump:\n");
2272    write(fd, buffer, strlen(buffer));
2273    snprintf(buffer, SIZE,
2274             " Stream  Can be muted  Index Min  Index Max  Index Cur [device : index]...\n");
2275    write(fd, buffer, strlen(buffer));
2276    for (size_t i = 0; i < AUDIO_STREAM_CNT; i++) {
2277        snprintf(buffer, SIZE, " %02zu      ", i);
2278        write(fd, buffer, strlen(buffer));
2279        mStreams[i].dump(fd);
2280    }
2281
2282    snprintf(buffer, SIZE, "\nTotal Effects CPU: %f MIPS, Total Effects memory: %d KB\n",
2283            (float)mTotalEffectsCpuLoad/10, mTotalEffectsMemory);
2284    write(fd, buffer, strlen(buffer));
2285
2286    snprintf(buffer, SIZE, "Registered effects:\n");
2287    write(fd, buffer, strlen(buffer));
2288    for (size_t i = 0; i < mEffects.size(); i++) {
2289        snprintf(buffer, SIZE, "- Effect %d dump:\n", mEffects.keyAt(i));
2290        write(fd, buffer, strlen(buffer));
2291        mEffects.valueAt(i)->dump(fd);
2292    }
2293
2294    snprintf(buffer, SIZE, "\nAudio Patches:\n");
2295    write(fd, buffer, strlen(buffer));
2296    for (size_t i = 0; i < mAudioPatches.size(); i++) {
2297        mAudioPatches[i]->dump(fd, 2, i);
2298    }
2299
2300    return NO_ERROR;
2301}
2302
2303// This function checks for the parameters which can be offloaded.
2304// This can be enhanced depending on the capability of the DSP and policy
2305// of the system.
2306bool AudioPolicyManager::isOffloadSupported(const audio_offload_info_t& offloadInfo)
2307{
2308    ALOGV("isOffloadSupported: SR=%u, CM=0x%x, Format=0x%x, StreamType=%d,"
2309     " BitRate=%u, duration=%" PRId64 " us, has_video=%d",
2310     offloadInfo.sample_rate, offloadInfo.channel_mask,
2311     offloadInfo.format,
2312     offloadInfo.stream_type, offloadInfo.bit_rate, offloadInfo.duration_us,
2313     offloadInfo.has_video);
2314
2315    // Check if offload has been disabled
2316    char propValue[PROPERTY_VALUE_MAX];
2317    if (property_get("audio.offload.disable", propValue, "0")) {
2318        if (atoi(propValue) != 0) {
2319            ALOGV("offload disabled by audio.offload.disable=%s", propValue );
2320            return false;
2321        }
2322    }
2323
2324    // Check if stream type is music, then only allow offload as of now.
2325    if (offloadInfo.stream_type != AUDIO_STREAM_MUSIC)
2326    {
2327        ALOGV("isOffloadSupported: stream_type != MUSIC, returning false");
2328        return false;
2329    }
2330
2331    //TODO: enable audio offloading with video when ready
2332    if (offloadInfo.has_video)
2333    {
2334        ALOGV("isOffloadSupported: has_video == true, returning false");
2335        return false;
2336    }
2337
2338    //If duration is less than minimum value defined in property, return false
2339    if (property_get("audio.offload.min.duration.secs", propValue, NULL)) {
2340        if (offloadInfo.duration_us < (atoi(propValue) * 1000000 )) {
2341            ALOGV("Offload denied by duration < audio.offload.min.duration.secs(=%s)", propValue);
2342            return false;
2343        }
2344    } else if (offloadInfo.duration_us < OFFLOAD_DEFAULT_MIN_DURATION_SECS * 1000000) {
2345        ALOGV("Offload denied by duration < default min(=%u)", OFFLOAD_DEFAULT_MIN_DURATION_SECS);
2346        return false;
2347    }
2348
2349    // Do not allow offloading if one non offloadable effect is enabled. This prevents from
2350    // creating an offloaded track and tearing it down immediately after start when audioflinger
2351    // detects there is an active non offloadable effect.
2352    // FIXME: We should check the audio session here but we do not have it in this context.
2353    // This may prevent offloading in rare situations where effects are left active by apps
2354    // in the background.
2355    if (isNonOffloadableEffectEnabled()) {
2356        return false;
2357    }
2358
2359    // See if there is a profile to support this.
2360    // AUDIO_DEVICE_NONE
2361    sp<IOProfile> profile = getProfileForDirectOutput(AUDIO_DEVICE_NONE /*ignore device */,
2362                                            offloadInfo.sample_rate,
2363                                            offloadInfo.format,
2364                                            offloadInfo.channel_mask,
2365                                            AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD);
2366    ALOGV("isOffloadSupported() profile %sfound", profile != 0 ? "" : "NOT ");
2367    return (profile != 0);
2368}
2369
2370status_t AudioPolicyManager::listAudioPorts(audio_port_role_t role,
2371                                            audio_port_type_t type,
2372                                            unsigned int *num_ports,
2373                                            struct audio_port *ports,
2374                                            unsigned int *generation)
2375{
2376    if (num_ports == NULL || (*num_ports != 0 && ports == NULL) ||
2377            generation == NULL) {
2378        return BAD_VALUE;
2379    }
2380    ALOGV("listAudioPorts() role %d type %d num_ports %d ports %p", role, type, *num_ports, ports);
2381    if (ports == NULL) {
2382        *num_ports = 0;
2383    }
2384
2385    size_t portsWritten = 0;
2386    size_t portsMax = *num_ports;
2387    *num_ports = 0;
2388    if (type == AUDIO_PORT_TYPE_NONE || type == AUDIO_PORT_TYPE_DEVICE) {
2389        if (role == AUDIO_PORT_ROLE_SINK || role == AUDIO_PORT_ROLE_NONE) {
2390            for (size_t i = 0;
2391                    i  < mAvailableOutputDevices.size() && portsWritten < portsMax; i++) {
2392                mAvailableOutputDevices[i]->toAudioPort(&ports[portsWritten++]);
2393            }
2394            *num_ports += mAvailableOutputDevices.size();
2395        }
2396        if (role == AUDIO_PORT_ROLE_SOURCE || role == AUDIO_PORT_ROLE_NONE) {
2397            for (size_t i = 0;
2398                    i  < mAvailableInputDevices.size() && portsWritten < portsMax; i++) {
2399                mAvailableInputDevices[i]->toAudioPort(&ports[portsWritten++]);
2400            }
2401            *num_ports += mAvailableInputDevices.size();
2402        }
2403    }
2404    if (type == AUDIO_PORT_TYPE_NONE || type == AUDIO_PORT_TYPE_MIX) {
2405        if (role == AUDIO_PORT_ROLE_SINK || role == AUDIO_PORT_ROLE_NONE) {
2406            for (size_t i = 0; i < mInputs.size() && portsWritten < portsMax; i++) {
2407                mInputs[i]->toAudioPort(&ports[portsWritten++]);
2408            }
2409            *num_ports += mInputs.size();
2410        }
2411        if (role == AUDIO_PORT_ROLE_SOURCE || role == AUDIO_PORT_ROLE_NONE) {
2412            size_t numOutputs = 0;
2413            for (size_t i = 0; i < mOutputs.size(); i++) {
2414                if (!mOutputs[i]->isDuplicated()) {
2415                    numOutputs++;
2416                    if (portsWritten < portsMax) {
2417                        mOutputs[i]->toAudioPort(&ports[portsWritten++]);
2418                    }
2419                }
2420            }
2421            *num_ports += numOutputs;
2422        }
2423    }
2424    *generation = curAudioPortGeneration();
2425    ALOGV("listAudioPorts() got %zu ports needed %d", portsWritten, *num_ports);
2426    return NO_ERROR;
2427}
2428
2429status_t AudioPolicyManager::getAudioPort(struct audio_port *port __unused)
2430{
2431    return NO_ERROR;
2432}
2433
2434sp<AudioPolicyManager::AudioOutputDescriptor> AudioPolicyManager::getOutputFromId(
2435                                                                    audio_port_handle_t id) const
2436{
2437    sp<AudioOutputDescriptor> outputDesc = NULL;
2438    for (size_t i = 0; i < mOutputs.size(); i++) {
2439        outputDesc = mOutputs.valueAt(i);
2440        if (outputDesc->mId == id) {
2441            break;
2442        }
2443    }
2444    return outputDesc;
2445}
2446
2447sp<AudioPolicyManager::AudioInputDescriptor> AudioPolicyManager::getInputFromId(
2448                                                                    audio_port_handle_t id) const
2449{
2450    sp<AudioInputDescriptor> inputDesc = NULL;
2451    for (size_t i = 0; i < mInputs.size(); i++) {
2452        inputDesc = mInputs.valueAt(i);
2453        if (inputDesc->mId == id) {
2454            break;
2455        }
2456    }
2457    return inputDesc;
2458}
2459
2460sp <AudioPolicyManager::HwModule> AudioPolicyManager::getModuleForDevice(
2461                                                                    audio_devices_t device) const
2462{
2463    sp <HwModule> module;
2464
2465    for (size_t i = 0; i < mHwModules.size(); i++) {
2466        if (mHwModules[i]->mHandle == 0) {
2467            continue;
2468        }
2469        if (audio_is_output_device(device)) {
2470            for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
2471            {
2472                if (mHwModules[i]->mOutputProfiles[j]->mSupportedDevices.types() & device) {
2473                    return mHwModules[i];
2474                }
2475            }
2476        } else {
2477            for (size_t j = 0; j < mHwModules[i]->mInputProfiles.size(); j++) {
2478                if (mHwModules[i]->mInputProfiles[j]->mSupportedDevices.types() &
2479                        device & ~AUDIO_DEVICE_BIT_IN) {
2480                    return mHwModules[i];
2481                }
2482            }
2483        }
2484    }
2485    return module;
2486}
2487
2488sp <AudioPolicyManager::HwModule> AudioPolicyManager::getModuleFromName(const char *name) const
2489{
2490    sp <HwModule> module;
2491
2492    for (size_t i = 0; i < mHwModules.size(); i++)
2493    {
2494        if (strcmp(mHwModules[i]->mName, name) == 0) {
2495            return mHwModules[i];
2496        }
2497    }
2498    return module;
2499}
2500
2501audio_devices_t AudioPolicyManager::availablePrimaryOutputDevices()
2502{
2503    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(mPrimaryOutput);
2504    audio_devices_t devices = outputDesc->mProfile->mSupportedDevices.types();
2505    return devices & mAvailableOutputDevices.types();
2506}
2507
2508audio_devices_t AudioPolicyManager::availablePrimaryInputDevices()
2509{
2510    audio_module_handle_t primaryHandle =
2511                                mOutputs.valueFor(mPrimaryOutput)->mProfile->mModule->mHandle;
2512    audio_devices_t devices = AUDIO_DEVICE_NONE;
2513    for (size_t i = 0; i < mAvailableInputDevices.size(); i++) {
2514        if (mAvailableInputDevices[i]->mModule->mHandle == primaryHandle) {
2515            devices |= mAvailableInputDevices[i]->mDeviceType;
2516        }
2517    }
2518    return devices;
2519}
2520
2521status_t AudioPolicyManager::createAudioPatch(const struct audio_patch *patch,
2522                                               audio_patch_handle_t *handle,
2523                                               uid_t uid)
2524{
2525    ALOGV("createAudioPatch()");
2526
2527    if (handle == NULL || patch == NULL) {
2528        return BAD_VALUE;
2529    }
2530    ALOGV("createAudioPatch() num sources %d num sinks %d", patch->num_sources, patch->num_sinks);
2531
2532    if (patch->num_sources == 0 || patch->num_sources > AUDIO_PATCH_PORTS_MAX ||
2533            patch->num_sinks == 0 || patch->num_sinks > AUDIO_PATCH_PORTS_MAX) {
2534        return BAD_VALUE;
2535    }
2536    // only one source per audio patch supported for now
2537    if (patch->num_sources > 1) {
2538        return INVALID_OPERATION;
2539    }
2540
2541    if (patch->sources[0].role != AUDIO_PORT_ROLE_SOURCE) {
2542        return INVALID_OPERATION;
2543    }
2544    for (size_t i = 0; i < patch->num_sinks; i++) {
2545        if (patch->sinks[i].role != AUDIO_PORT_ROLE_SINK) {
2546            return INVALID_OPERATION;
2547        }
2548    }
2549
2550    sp<AudioPatch> patchDesc;
2551    ssize_t index = mAudioPatches.indexOfKey(*handle);
2552
2553    ALOGV("createAudioPatch source id %d role %d type %d", patch->sources[0].id,
2554                                                           patch->sources[0].role,
2555                                                           patch->sources[0].type);
2556#if LOG_NDEBUG == 0
2557    for (size_t i = 0; i < patch->num_sinks; i++) {
2558        ALOGV("createAudioPatch sink %d: id %d role %d type %d", i, patch->sinks[i].id,
2559                                                             patch->sinks[i].role,
2560                                                             patch->sinks[i].type);
2561    }
2562#endif
2563
2564    if (index >= 0) {
2565        patchDesc = mAudioPatches.valueAt(index);
2566        ALOGV("createAudioPatch() mUidCached %d patchDesc->mUid %d uid %d",
2567                                                                  mUidCached, patchDesc->mUid, uid);
2568        if (patchDesc->mUid != mUidCached && uid != patchDesc->mUid) {
2569            return INVALID_OPERATION;
2570        }
2571    } else {
2572        *handle = 0;
2573    }
2574
2575    if (patch->sources[0].type == AUDIO_PORT_TYPE_MIX) {
2576        sp<AudioOutputDescriptor> outputDesc = getOutputFromId(patch->sources[0].id);
2577        if (outputDesc == NULL) {
2578            ALOGV("createAudioPatch() output not found for id %d", patch->sources[0].id);
2579            return BAD_VALUE;
2580        }
2581        ALOG_ASSERT(!outputDesc->isDuplicated(),"duplicated output %d in source in ports",
2582                                                outputDesc->mIoHandle);
2583        if (patchDesc != 0) {
2584            if (patchDesc->mPatch.sources[0].id != patch->sources[0].id) {
2585                ALOGV("createAudioPatch() source id differs for patch current id %d new id %d",
2586                                          patchDesc->mPatch.sources[0].id, patch->sources[0].id);
2587                return BAD_VALUE;
2588            }
2589        }
2590        DeviceVector devices;
2591        for (size_t i = 0; i < patch->num_sinks; i++) {
2592            // Only support mix to devices connection
2593            // TODO add support for mix to mix connection
2594            if (patch->sinks[i].type != AUDIO_PORT_TYPE_DEVICE) {
2595                ALOGV("createAudioPatch() source mix but sink is not a device");
2596                return INVALID_OPERATION;
2597            }
2598            sp<DeviceDescriptor> devDesc =
2599                    mAvailableOutputDevices.getDeviceFromId(patch->sinks[i].id);
2600            if (devDesc == 0) {
2601                ALOGV("createAudioPatch() out device not found for id %d", patch->sinks[i].id);
2602                return BAD_VALUE;
2603            }
2604
2605            if (!outputDesc->mProfile->isCompatibleProfile(devDesc->mDeviceType,
2606                                                           devDesc->mAddress,
2607                                                           patch->sources[0].sample_rate,
2608                                                         NULL,  // updatedSamplingRate
2609                                                         patch->sources[0].format,
2610                                                         patch->sources[0].channel_mask,
2611                                                         AUDIO_OUTPUT_FLAG_NONE /*FIXME*/)) {
2612                ALOGV("createAudioPatch() profile not supported for device %08x",
2613                      devDesc->mDeviceType);
2614                return INVALID_OPERATION;
2615            }
2616            devices.add(devDesc);
2617        }
2618        if (devices.size() == 0) {
2619            return INVALID_OPERATION;
2620        }
2621
2622        // TODO: reconfigure output format and channels here
2623        ALOGV("createAudioPatch() setting device %08x on output %d",
2624              devices.types(), outputDesc->mIoHandle);
2625        setOutputDevice(outputDesc->mIoHandle, devices.types(), true, 0, handle);
2626        index = mAudioPatches.indexOfKey(*handle);
2627        if (index >= 0) {
2628            if (patchDesc != 0 && patchDesc != mAudioPatches.valueAt(index)) {
2629                ALOGW("createAudioPatch() setOutputDevice() did not reuse the patch provided");
2630            }
2631            patchDesc = mAudioPatches.valueAt(index);
2632            patchDesc->mUid = uid;
2633            ALOGV("createAudioPatch() success");
2634        } else {
2635            ALOGW("createAudioPatch() setOutputDevice() failed to create a patch");
2636            return INVALID_OPERATION;
2637        }
2638    } else if (patch->sources[0].type == AUDIO_PORT_TYPE_DEVICE) {
2639        if (patch->sinks[0].type == AUDIO_PORT_TYPE_MIX) {
2640            // input device to input mix connection
2641            // only one sink supported when connecting an input device to a mix
2642            if (patch->num_sinks > 1) {
2643                return INVALID_OPERATION;
2644            }
2645            sp<AudioInputDescriptor> inputDesc = getInputFromId(patch->sinks[0].id);
2646            if (inputDesc == NULL) {
2647                return BAD_VALUE;
2648            }
2649            if (patchDesc != 0) {
2650                if (patchDesc->mPatch.sinks[0].id != patch->sinks[0].id) {
2651                    return BAD_VALUE;
2652                }
2653            }
2654            sp<DeviceDescriptor> devDesc =
2655                    mAvailableInputDevices.getDeviceFromId(patch->sources[0].id);
2656            if (devDesc == 0) {
2657                return BAD_VALUE;
2658            }
2659
2660            if (!inputDesc->mProfile->isCompatibleProfile(devDesc->mDeviceType,
2661                                                          devDesc->mAddress,
2662                                                          patch->sinks[0].sample_rate,
2663                                                          NULL, /*updatedSampleRate*/
2664                                                          patch->sinks[0].format,
2665                                                          patch->sinks[0].channel_mask,
2666                                                          // FIXME for the parameter type,
2667                                                          // and the NONE
2668                                                          (audio_output_flags_t)
2669                                                            AUDIO_INPUT_FLAG_NONE)) {
2670                return INVALID_OPERATION;
2671            }
2672            // TODO: reconfigure output format and channels here
2673            ALOGV("createAudioPatch() setting device %08x on output %d",
2674                                                  devDesc->mDeviceType, inputDesc->mIoHandle);
2675            setInputDevice(inputDesc->mIoHandle, devDesc->mDeviceType, true, handle);
2676            index = mAudioPatches.indexOfKey(*handle);
2677            if (index >= 0) {
2678                if (patchDesc != 0 && patchDesc != mAudioPatches.valueAt(index)) {
2679                    ALOGW("createAudioPatch() setInputDevice() did not reuse the patch provided");
2680                }
2681                patchDesc = mAudioPatches.valueAt(index);
2682                patchDesc->mUid = uid;
2683                ALOGV("createAudioPatch() success");
2684            } else {
2685                ALOGW("createAudioPatch() setInputDevice() failed to create a patch");
2686                return INVALID_OPERATION;
2687            }
2688        } else if (patch->sinks[0].type == AUDIO_PORT_TYPE_DEVICE) {
2689            // device to device connection
2690            if (patchDesc != 0) {
2691                if (patchDesc->mPatch.sources[0].id != patch->sources[0].id) {
2692                    return BAD_VALUE;
2693                }
2694            }
2695            sp<DeviceDescriptor> srcDeviceDesc =
2696                    mAvailableInputDevices.getDeviceFromId(patch->sources[0].id);
2697            if (srcDeviceDesc == 0) {
2698                return BAD_VALUE;
2699            }
2700
2701            //update source and sink with our own data as the data passed in the patch may
2702            // be incomplete.
2703            struct audio_patch newPatch = *patch;
2704            srcDeviceDesc->toAudioPortConfig(&newPatch.sources[0], &patch->sources[0]);
2705
2706            for (size_t i = 0; i < patch->num_sinks; i++) {
2707                if (patch->sinks[i].type != AUDIO_PORT_TYPE_DEVICE) {
2708                    ALOGV("createAudioPatch() source device but one sink is not a device");
2709                    return INVALID_OPERATION;
2710                }
2711
2712                sp<DeviceDescriptor> sinkDeviceDesc =
2713                        mAvailableOutputDevices.getDeviceFromId(patch->sinks[i].id);
2714                if (sinkDeviceDesc == 0) {
2715                    return BAD_VALUE;
2716                }
2717                sinkDeviceDesc->toAudioPortConfig(&newPatch.sinks[i], &patch->sinks[i]);
2718
2719                if (srcDeviceDesc->mModule != sinkDeviceDesc->mModule) {
2720                    // only one sink supported when connected devices across HW modules
2721                    if (patch->num_sinks > 1) {
2722                        return INVALID_OPERATION;
2723                    }
2724                    SortedVector<audio_io_handle_t> outputs =
2725                                            getOutputsForDevice(sinkDeviceDesc->mDeviceType,
2726                                                                mOutputs);
2727                    // if the sink device is reachable via an opened output stream, request to go via
2728                    // this output stream by adding a second source to the patch description
2729                    audio_io_handle_t output = selectOutput(outputs,
2730                                                            AUDIO_OUTPUT_FLAG_NONE,
2731                                                            AUDIO_FORMAT_INVALID);
2732                    if (output != AUDIO_IO_HANDLE_NONE) {
2733                        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
2734                        if (outputDesc->isDuplicated()) {
2735                            return INVALID_OPERATION;
2736                        }
2737                        outputDesc->toAudioPortConfig(&newPatch.sources[1], &patch->sources[0]);
2738                        newPatch.num_sources = 2;
2739                    }
2740                }
2741            }
2742            // TODO: check from routing capabilities in config file and other conflicting patches
2743
2744            audio_patch_handle_t afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
2745            if (index >= 0) {
2746                afPatchHandle = patchDesc->mAfPatchHandle;
2747            }
2748
2749            status_t status = mpClientInterface->createAudioPatch(&newPatch,
2750                                                                  &afPatchHandle,
2751                                                                  0);
2752            ALOGV("createAudioPatch() patch panel returned %d patchHandle %d",
2753                                                                  status, afPatchHandle);
2754            if (status == NO_ERROR) {
2755                if (index < 0) {
2756                    patchDesc = new AudioPatch((audio_patch_handle_t)nextUniqueId(),
2757                                               &newPatch, uid);
2758                    addAudioPatch(patchDesc->mHandle, patchDesc);
2759                } else {
2760                    patchDesc->mPatch = newPatch;
2761                }
2762                patchDesc->mAfPatchHandle = afPatchHandle;
2763                *handle = patchDesc->mHandle;
2764                nextAudioPortGeneration();
2765                mpClientInterface->onAudioPatchListUpdate();
2766            } else {
2767                ALOGW("createAudioPatch() patch panel could not connect device patch, error %d",
2768                status);
2769                return INVALID_OPERATION;
2770            }
2771        } else {
2772            return BAD_VALUE;
2773        }
2774    } else {
2775        return BAD_VALUE;
2776    }
2777    return NO_ERROR;
2778}
2779
2780status_t AudioPolicyManager::releaseAudioPatch(audio_patch_handle_t handle,
2781                                                  uid_t uid)
2782{
2783    ALOGV("releaseAudioPatch() patch %d", handle);
2784
2785    ssize_t index = mAudioPatches.indexOfKey(handle);
2786
2787    if (index < 0) {
2788        return BAD_VALUE;
2789    }
2790    sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
2791    ALOGV("releaseAudioPatch() mUidCached %d patchDesc->mUid %d uid %d",
2792          mUidCached, patchDesc->mUid, uid);
2793    if (patchDesc->mUid != mUidCached && uid != patchDesc->mUid) {
2794        return INVALID_OPERATION;
2795    }
2796
2797    struct audio_patch *patch = &patchDesc->mPatch;
2798    patchDesc->mUid = mUidCached;
2799    if (patch->sources[0].type == AUDIO_PORT_TYPE_MIX) {
2800        sp<AudioOutputDescriptor> outputDesc = getOutputFromId(patch->sources[0].id);
2801        if (outputDesc == NULL) {
2802            ALOGV("releaseAudioPatch() output not found for id %d", patch->sources[0].id);
2803            return BAD_VALUE;
2804        }
2805
2806        setOutputDevice(outputDesc->mIoHandle,
2807                        getNewOutputDevice(outputDesc->mIoHandle, true /*fromCache*/),
2808                       true,
2809                       0,
2810                       NULL);
2811    } else if (patch->sources[0].type == AUDIO_PORT_TYPE_DEVICE) {
2812        if (patch->sinks[0].type == AUDIO_PORT_TYPE_MIX) {
2813            sp<AudioInputDescriptor> inputDesc = getInputFromId(patch->sinks[0].id);
2814            if (inputDesc == NULL) {
2815                ALOGV("releaseAudioPatch() input not found for id %d", patch->sinks[0].id);
2816                return BAD_VALUE;
2817            }
2818            setInputDevice(inputDesc->mIoHandle,
2819                           getNewInputDevice(inputDesc->mIoHandle),
2820                           true,
2821                           NULL);
2822        } else if (patch->sinks[0].type == AUDIO_PORT_TYPE_DEVICE) {
2823            audio_patch_handle_t afPatchHandle = patchDesc->mAfPatchHandle;
2824            status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, 0);
2825            ALOGV("releaseAudioPatch() patch panel returned %d patchHandle %d",
2826                                                              status, patchDesc->mAfPatchHandle);
2827            removeAudioPatch(patchDesc->mHandle);
2828            nextAudioPortGeneration();
2829            mpClientInterface->onAudioPatchListUpdate();
2830        } else {
2831            return BAD_VALUE;
2832        }
2833    } else {
2834        return BAD_VALUE;
2835    }
2836    return NO_ERROR;
2837}
2838
2839status_t AudioPolicyManager::listAudioPatches(unsigned int *num_patches,
2840                                              struct audio_patch *patches,
2841                                              unsigned int *generation)
2842{
2843    if (num_patches == NULL || (*num_patches != 0 && patches == NULL) ||
2844            generation == NULL) {
2845        return BAD_VALUE;
2846    }
2847    ALOGV("listAudioPatches() num_patches %d patches %p available patches %zu",
2848          *num_patches, patches, mAudioPatches.size());
2849    if (patches == NULL) {
2850        *num_patches = 0;
2851    }
2852
2853    size_t patchesWritten = 0;
2854    size_t patchesMax = *num_patches;
2855    for (size_t i = 0;
2856            i  < mAudioPatches.size() && patchesWritten < patchesMax; i++) {
2857        patches[patchesWritten] = mAudioPatches[i]->mPatch;
2858        patches[patchesWritten++].id = mAudioPatches[i]->mHandle;
2859        ALOGV("listAudioPatches() patch %zu num_sources %d num_sinks %d",
2860              i, mAudioPatches[i]->mPatch.num_sources, mAudioPatches[i]->mPatch.num_sinks);
2861    }
2862    *num_patches = mAudioPatches.size();
2863
2864    *generation = curAudioPortGeneration();
2865    ALOGV("listAudioPatches() got %zu patches needed %d", patchesWritten, *num_patches);
2866    return NO_ERROR;
2867}
2868
2869status_t AudioPolicyManager::setAudioPortConfig(const struct audio_port_config *config)
2870{
2871    ALOGV("setAudioPortConfig()");
2872
2873    if (config == NULL) {
2874        return BAD_VALUE;
2875    }
2876    ALOGV("setAudioPortConfig() on port handle %d", config->id);
2877    // Only support gain configuration for now
2878    if (config->config_mask != AUDIO_PORT_CONFIG_GAIN) {
2879        return INVALID_OPERATION;
2880    }
2881
2882    sp<AudioPortConfig> audioPortConfig;
2883    if (config->type == AUDIO_PORT_TYPE_MIX) {
2884        if (config->role == AUDIO_PORT_ROLE_SOURCE) {
2885            sp<AudioOutputDescriptor> outputDesc = getOutputFromId(config->id);
2886            if (outputDesc == NULL) {
2887                return BAD_VALUE;
2888            }
2889            ALOG_ASSERT(!outputDesc->isDuplicated(),
2890                        "setAudioPortConfig() called on duplicated output %d",
2891                        outputDesc->mIoHandle);
2892            audioPortConfig = outputDesc;
2893        } else if (config->role == AUDIO_PORT_ROLE_SINK) {
2894            sp<AudioInputDescriptor> inputDesc = getInputFromId(config->id);
2895            if (inputDesc == NULL) {
2896                return BAD_VALUE;
2897            }
2898            audioPortConfig = inputDesc;
2899        } else {
2900            return BAD_VALUE;
2901        }
2902    } else if (config->type == AUDIO_PORT_TYPE_DEVICE) {
2903        sp<DeviceDescriptor> deviceDesc;
2904        if (config->role == AUDIO_PORT_ROLE_SOURCE) {
2905            deviceDesc = mAvailableInputDevices.getDeviceFromId(config->id);
2906        } else if (config->role == AUDIO_PORT_ROLE_SINK) {
2907            deviceDesc = mAvailableOutputDevices.getDeviceFromId(config->id);
2908        } else {
2909            return BAD_VALUE;
2910        }
2911        if (deviceDesc == NULL) {
2912            return BAD_VALUE;
2913        }
2914        audioPortConfig = deviceDesc;
2915    } else {
2916        return BAD_VALUE;
2917    }
2918
2919    struct audio_port_config backupConfig;
2920    status_t status = audioPortConfig->applyAudioPortConfig(config, &backupConfig);
2921    if (status == NO_ERROR) {
2922        struct audio_port_config newConfig;
2923        audioPortConfig->toAudioPortConfig(&newConfig, config);
2924        status = mpClientInterface->setAudioPortConfig(&newConfig, 0);
2925    }
2926    if (status != NO_ERROR) {
2927        audioPortConfig->applyAudioPortConfig(&backupConfig);
2928    }
2929
2930    return status;
2931}
2932
2933void AudioPolicyManager::clearAudioPatches(uid_t uid)
2934{
2935    for (ssize_t i = (ssize_t)mAudioPatches.size() - 1; i >= 0; i--)  {
2936        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(i);
2937        if (patchDesc->mUid == uid) {
2938            releaseAudioPatch(mAudioPatches.keyAt(i), uid);
2939        }
2940    }
2941}
2942
2943status_t AudioPolicyManager::acquireSoundTriggerSession(audio_session_t *session,
2944                                       audio_io_handle_t *ioHandle,
2945                                       audio_devices_t *device)
2946{
2947    *session = (audio_session_t)mpClientInterface->newAudioUniqueId();
2948    *ioHandle = (audio_io_handle_t)mpClientInterface->newAudioUniqueId();
2949    *device = getDeviceAndMixForInputSource(AUDIO_SOURCE_HOTWORD);
2950
2951    mSoundTriggerSessions.add(*session, *ioHandle);
2952
2953    return NO_ERROR;
2954}
2955
2956status_t AudioPolicyManager::releaseSoundTriggerSession(audio_session_t session)
2957{
2958    ssize_t index = mSoundTriggerSessions.indexOfKey(session);
2959    if (index < 0) {
2960        ALOGW("acquireSoundTriggerSession() session %d not registered", session);
2961        return BAD_VALUE;
2962    }
2963
2964    mSoundTriggerSessions.removeItem(session);
2965    return NO_ERROR;
2966}
2967
2968status_t AudioPolicyManager::addAudioPatch(audio_patch_handle_t handle,
2969                                           const sp<AudioPatch>& patch)
2970{
2971    ssize_t index = mAudioPatches.indexOfKey(handle);
2972
2973    if (index >= 0) {
2974        ALOGW("addAudioPatch() patch %d already in", handle);
2975        return ALREADY_EXISTS;
2976    }
2977    mAudioPatches.add(handle, patch);
2978    ALOGV("addAudioPatch() handle %d af handle %d num_sources %d num_sinks %d source handle %d"
2979            "sink handle %d",
2980          handle, patch->mAfPatchHandle, patch->mPatch.num_sources, patch->mPatch.num_sinks,
2981          patch->mPatch.sources[0].id, patch->mPatch.sinks[0].id);
2982    return NO_ERROR;
2983}
2984
2985status_t AudioPolicyManager::removeAudioPatch(audio_patch_handle_t handle)
2986{
2987    ssize_t index = mAudioPatches.indexOfKey(handle);
2988
2989    if (index < 0) {
2990        ALOGW("removeAudioPatch() patch %d not in", handle);
2991        return ALREADY_EXISTS;
2992    }
2993    ALOGV("removeAudioPatch() handle %d af handle %d", handle,
2994                      mAudioPatches.valueAt(index)->mAfPatchHandle);
2995    mAudioPatches.removeItemsAt(index);
2996    return NO_ERROR;
2997}
2998
2999// ----------------------------------------------------------------------------
3000// AudioPolicyManager
3001// ----------------------------------------------------------------------------
3002
3003uint32_t AudioPolicyManager::nextUniqueId()
3004{
3005    return android_atomic_inc(&mNextUniqueId);
3006}
3007
3008uint32_t AudioPolicyManager::nextAudioPortGeneration()
3009{
3010    return android_atomic_inc(&mAudioPortGeneration);
3011}
3012
3013AudioPolicyManager::AudioPolicyManager(AudioPolicyClientInterface *clientInterface)
3014    :
3015#ifdef AUDIO_POLICY_TEST
3016    Thread(false),
3017#endif //AUDIO_POLICY_TEST
3018    mPrimaryOutput((audio_io_handle_t)0),
3019    mPhoneState(AUDIO_MODE_NORMAL),
3020    mLimitRingtoneVolume(false), mLastVoiceVolume(-1.0f),
3021    mTotalEffectsCpuLoad(0), mTotalEffectsMemory(0),
3022    mA2dpSuspended(false),
3023    mSpeakerDrcEnabled(false), mNextUniqueId(1),
3024    mAudioPortGeneration(1),
3025    mBeaconMuteRefCount(0),
3026    mBeaconPlayingRefCount(0),
3027    mBeaconMuted(false)
3028{
3029    mUidCached = getuid();
3030    mpClientInterface = clientInterface;
3031
3032    for (int i = 0; i < AUDIO_POLICY_FORCE_USE_CNT; i++) {
3033        mForceUse[i] = AUDIO_POLICY_FORCE_NONE;
3034    }
3035
3036    mDefaultOutputDevice = new DeviceDescriptor(String8(""), AUDIO_DEVICE_OUT_SPEAKER);
3037    if (loadAudioPolicyConfig(AUDIO_POLICY_VENDOR_CONFIG_FILE) != NO_ERROR) {
3038        if (loadAudioPolicyConfig(AUDIO_POLICY_CONFIG_FILE) != NO_ERROR) {
3039            ALOGE("could not load audio policy configuration file, setting defaults");
3040            defaultAudioPolicyConfig();
3041        }
3042    }
3043    // mAvailableOutputDevices and mAvailableInputDevices now contain all attached devices
3044
3045    // must be done after reading the policy
3046    initializeVolumeCurves();
3047
3048    // open all output streams needed to access attached devices
3049    audio_devices_t outputDeviceTypes = mAvailableOutputDevices.types();
3050    audio_devices_t inputDeviceTypes = mAvailableInputDevices.types() & ~AUDIO_DEVICE_BIT_IN;
3051    for (size_t i = 0; i < mHwModules.size(); i++) {
3052        mHwModules[i]->mHandle = mpClientInterface->loadHwModule(mHwModules[i]->mName);
3053        if (mHwModules[i]->mHandle == 0) {
3054            ALOGW("could not open HW module %s", mHwModules[i]->mName);
3055            continue;
3056        }
3057        // open all output streams needed to access attached devices
3058        // except for direct output streams that are only opened when they are actually
3059        // required by an app.
3060        // This also validates mAvailableOutputDevices list
3061        for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
3062        {
3063            const sp<IOProfile> outProfile = mHwModules[i]->mOutputProfiles[j];
3064
3065            if (outProfile->mSupportedDevices.isEmpty()) {
3066                ALOGW("Output profile contains no device on module %s", mHwModules[i]->mName);
3067                continue;
3068            }
3069
3070            if ((outProfile->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) != 0) {
3071                continue;
3072            }
3073            audio_devices_t profileType = outProfile->mSupportedDevices.types();
3074            if ((profileType & mDefaultOutputDevice->mDeviceType) != AUDIO_DEVICE_NONE) {
3075                profileType = mDefaultOutputDevice->mDeviceType;
3076            } else {
3077                // chose first device present in mSupportedDevices also part of
3078                // outputDeviceTypes
3079                for (size_t k = 0; k  < outProfile->mSupportedDevices.size(); k++) {
3080                    profileType = outProfile->mSupportedDevices[k]->mDeviceType;
3081                    if ((profileType & outputDeviceTypes) != 0) {
3082                        break;
3083                    }
3084                }
3085            }
3086            if ((profileType & outputDeviceTypes) == 0) {
3087                continue;
3088            }
3089            sp<AudioOutputDescriptor> outputDesc = new AudioOutputDescriptor(outProfile);
3090
3091            outputDesc->mDevice = profileType;
3092            audio_config_t config = AUDIO_CONFIG_INITIALIZER;
3093            config.sample_rate = outputDesc->mSamplingRate;
3094            config.channel_mask = outputDesc->mChannelMask;
3095            config.format = outputDesc->mFormat;
3096            audio_io_handle_t output = AUDIO_IO_HANDLE_NONE;
3097            status_t status = mpClientInterface->openOutput(outProfile->mModule->mHandle,
3098                                                            &output,
3099                                                            &config,
3100                                                            &outputDesc->mDevice,
3101                                                            String8(""),
3102                                                            &outputDesc->mLatency,
3103                                                            outputDesc->mFlags);
3104
3105            if (status != NO_ERROR) {
3106                ALOGW("Cannot open output stream for device %08x on hw module %s",
3107                      outputDesc->mDevice,
3108                      mHwModules[i]->mName);
3109            } else {
3110                outputDesc->mSamplingRate = config.sample_rate;
3111                outputDesc->mChannelMask = config.channel_mask;
3112                outputDesc->mFormat = config.format;
3113
3114                for (size_t k = 0; k  < outProfile->mSupportedDevices.size(); k++) {
3115                    audio_devices_t type = outProfile->mSupportedDevices[k]->mDeviceType;
3116                    ssize_t index =
3117                            mAvailableOutputDevices.indexOf(outProfile->mSupportedDevices[k]);
3118                    // give a valid ID to an attached device once confirmed it is reachable
3119                    if ((index >= 0) && (mAvailableOutputDevices[index]->mId == 0)) {
3120                        mAvailableOutputDevices[index]->mId = nextUniqueId();
3121                        mAvailableOutputDevices[index]->mModule = mHwModules[i];
3122                    }
3123                }
3124                if (mPrimaryOutput == 0 &&
3125                        outProfile->mFlags & AUDIO_OUTPUT_FLAG_PRIMARY) {
3126                    mPrimaryOutput = output;
3127                }
3128                addOutput(output, outputDesc);
3129                setOutputDevice(output,
3130                                outputDesc->mDevice,
3131                                true);
3132            }
3133        }
3134        // open input streams needed to access attached devices to validate
3135        // mAvailableInputDevices list
3136        for (size_t j = 0; j < mHwModules[i]->mInputProfiles.size(); j++)
3137        {
3138            const sp<IOProfile> inProfile = mHwModules[i]->mInputProfiles[j];
3139
3140            if (inProfile->mSupportedDevices.isEmpty()) {
3141                ALOGW("Input profile contains no device on module %s", mHwModules[i]->mName);
3142                continue;
3143            }
3144            // chose first device present in mSupportedDevices also part of
3145            // inputDeviceTypes
3146            audio_devices_t profileType = AUDIO_DEVICE_NONE;
3147            for (size_t k = 0; k  < inProfile->mSupportedDevices.size(); k++) {
3148                profileType = inProfile->mSupportedDevices[k]->mDeviceType;
3149                if (profileType & inputDeviceTypes) {
3150                    break;
3151                }
3152            }
3153            if ((profileType & inputDeviceTypes) == 0) {
3154                continue;
3155            }
3156            sp<AudioInputDescriptor> inputDesc = new AudioInputDescriptor(inProfile);
3157
3158            inputDesc->mInputSource = AUDIO_SOURCE_MIC;
3159            inputDesc->mDevice = profileType;
3160
3161            // find the address
3162            DeviceVector inputDevices = mAvailableInputDevices.getDevicesFromType(profileType);
3163            //   the inputs vector must be of size 1, but we don't want to crash here
3164            String8 address = inputDevices.size() > 0 ? inputDevices.itemAt(0)->mAddress
3165                    : String8("");
3166            ALOGV("  for input device 0x%x using address %s", profileType, address.string());
3167            ALOGE_IF(inputDevices.size() == 0, "Input device list is empty!");
3168
3169            audio_config_t config = AUDIO_CONFIG_INITIALIZER;
3170            config.sample_rate = inputDesc->mSamplingRate;
3171            config.channel_mask = inputDesc->mChannelMask;
3172            config.format = inputDesc->mFormat;
3173            audio_io_handle_t input = AUDIO_IO_HANDLE_NONE;
3174            status_t status = mpClientInterface->openInput(inProfile->mModule->mHandle,
3175                                                           &input,
3176                                                           &config,
3177                                                           &inputDesc->mDevice,
3178                                                           address,
3179                                                           AUDIO_SOURCE_MIC,
3180                                                           AUDIO_INPUT_FLAG_NONE);
3181
3182            if (status == NO_ERROR) {
3183                for (size_t k = 0; k  < inProfile->mSupportedDevices.size(); k++) {
3184                    audio_devices_t type = inProfile->mSupportedDevices[k]->mDeviceType;
3185                    ssize_t index =
3186                            mAvailableInputDevices.indexOf(inProfile->mSupportedDevices[k]);
3187                    // give a valid ID to an attached device once confirmed it is reachable
3188                    if ((index >= 0) && (mAvailableInputDevices[index]->mId == 0)) {
3189                        mAvailableInputDevices[index]->mId = nextUniqueId();
3190                        mAvailableInputDevices[index]->mModule = mHwModules[i];
3191                    }
3192                }
3193                mpClientInterface->closeInput(input);
3194            } else {
3195                ALOGW("Cannot open input stream for device %08x on hw module %s",
3196                      inputDesc->mDevice,
3197                      mHwModules[i]->mName);
3198            }
3199        }
3200    }
3201    // make sure all attached devices have been allocated a unique ID
3202    for (size_t i = 0; i  < mAvailableOutputDevices.size();) {
3203        if (mAvailableOutputDevices[i]->mId == 0) {
3204            ALOGW("Input device %08x unreachable", mAvailableOutputDevices[i]->mDeviceType);
3205            mAvailableOutputDevices.remove(mAvailableOutputDevices[i]);
3206            continue;
3207        }
3208        i++;
3209    }
3210    for (size_t i = 0; i  < mAvailableInputDevices.size();) {
3211        if (mAvailableInputDevices[i]->mId == 0) {
3212            ALOGW("Input device %08x unreachable", mAvailableInputDevices[i]->mDeviceType);
3213            mAvailableInputDevices.remove(mAvailableInputDevices[i]);
3214            continue;
3215        }
3216        i++;
3217    }
3218    // make sure default device is reachable
3219    if (mAvailableOutputDevices.indexOf(mDefaultOutputDevice) < 0) {
3220        ALOGE("Default device %08x is unreachable", mDefaultOutputDevice->mDeviceType);
3221    }
3222
3223    ALOGE_IF((mPrimaryOutput == 0), "Failed to open primary output");
3224
3225    updateDevicesAndOutputs();
3226
3227#ifdef AUDIO_POLICY_TEST
3228    if (mPrimaryOutput != 0) {
3229        AudioParameter outputCmd = AudioParameter();
3230        outputCmd.addInt(String8("set_id"), 0);
3231        mpClientInterface->setParameters(mPrimaryOutput, outputCmd.toString());
3232
3233        mTestDevice = AUDIO_DEVICE_OUT_SPEAKER;
3234        mTestSamplingRate = 44100;
3235        mTestFormat = AUDIO_FORMAT_PCM_16_BIT;
3236        mTestChannels =  AUDIO_CHANNEL_OUT_STEREO;
3237        mTestLatencyMs = 0;
3238        mCurOutput = 0;
3239        mDirectOutput = false;
3240        for (int i = 0; i < NUM_TEST_OUTPUTS; i++) {
3241            mTestOutputs[i] = 0;
3242        }
3243
3244        const size_t SIZE = 256;
3245        char buffer[SIZE];
3246        snprintf(buffer, SIZE, "AudioPolicyManagerTest");
3247        run(buffer, ANDROID_PRIORITY_AUDIO);
3248    }
3249#endif //AUDIO_POLICY_TEST
3250}
3251
3252AudioPolicyManager::~AudioPolicyManager()
3253{
3254#ifdef AUDIO_POLICY_TEST
3255    exit();
3256#endif //AUDIO_POLICY_TEST
3257   for (size_t i = 0; i < mOutputs.size(); i++) {
3258        mpClientInterface->closeOutput(mOutputs.keyAt(i));
3259   }
3260   for (size_t i = 0; i < mInputs.size(); i++) {
3261        mpClientInterface->closeInput(mInputs.keyAt(i));
3262   }
3263   mAvailableOutputDevices.clear();
3264   mAvailableInputDevices.clear();
3265   mOutputs.clear();
3266   mInputs.clear();
3267   mHwModules.clear();
3268}
3269
3270status_t AudioPolicyManager::initCheck()
3271{
3272    return (mPrimaryOutput == 0) ? NO_INIT : NO_ERROR;
3273}
3274
3275#ifdef AUDIO_POLICY_TEST
3276bool AudioPolicyManager::threadLoop()
3277{
3278    ALOGV("entering threadLoop()");
3279    while (!exitPending())
3280    {
3281        String8 command;
3282        int valueInt;
3283        String8 value;
3284
3285        Mutex::Autolock _l(mLock);
3286        mWaitWorkCV.waitRelative(mLock, milliseconds(50));
3287
3288        command = mpClientInterface->getParameters(0, String8("test_cmd_policy"));
3289        AudioParameter param = AudioParameter(command);
3290
3291        if (param.getInt(String8("test_cmd_policy"), valueInt) == NO_ERROR &&
3292            valueInt != 0) {
3293            ALOGV("Test command %s received", command.string());
3294            String8 target;
3295            if (param.get(String8("target"), target) != NO_ERROR) {
3296                target = "Manager";
3297            }
3298            if (param.getInt(String8("test_cmd_policy_output"), valueInt) == NO_ERROR) {
3299                param.remove(String8("test_cmd_policy_output"));
3300                mCurOutput = valueInt;
3301            }
3302            if (param.get(String8("test_cmd_policy_direct"), value) == NO_ERROR) {
3303                param.remove(String8("test_cmd_policy_direct"));
3304                if (value == "false") {
3305                    mDirectOutput = false;
3306                } else if (value == "true") {
3307                    mDirectOutput = true;
3308                }
3309            }
3310            if (param.getInt(String8("test_cmd_policy_input"), valueInt) == NO_ERROR) {
3311                param.remove(String8("test_cmd_policy_input"));
3312                mTestInput = valueInt;
3313            }
3314
3315            if (param.get(String8("test_cmd_policy_format"), value) == NO_ERROR) {
3316                param.remove(String8("test_cmd_policy_format"));
3317                int format = AUDIO_FORMAT_INVALID;
3318                if (value == "PCM 16 bits") {
3319                    format = AUDIO_FORMAT_PCM_16_BIT;
3320                } else if (value == "PCM 8 bits") {
3321                    format = AUDIO_FORMAT_PCM_8_BIT;
3322                } else if (value == "Compressed MP3") {
3323                    format = AUDIO_FORMAT_MP3;
3324                }
3325                if (format != AUDIO_FORMAT_INVALID) {
3326                    if (target == "Manager") {
3327                        mTestFormat = format;
3328                    } else if (mTestOutputs[mCurOutput] != 0) {
3329                        AudioParameter outputParam = AudioParameter();
3330                        outputParam.addInt(String8("format"), format);
3331                        mpClientInterface->setParameters(mTestOutputs[mCurOutput], outputParam.toString());
3332                    }
3333                }
3334            }
3335            if (param.get(String8("test_cmd_policy_channels"), value) == NO_ERROR) {
3336                param.remove(String8("test_cmd_policy_channels"));
3337                int channels = 0;
3338
3339                if (value == "Channels Stereo") {
3340                    channels =  AUDIO_CHANNEL_OUT_STEREO;
3341                } else if (value == "Channels Mono") {
3342                    channels =  AUDIO_CHANNEL_OUT_MONO;
3343                }
3344                if (channels != 0) {
3345                    if (target == "Manager") {
3346                        mTestChannels = channels;
3347                    } else if (mTestOutputs[mCurOutput] != 0) {
3348                        AudioParameter outputParam = AudioParameter();
3349                        outputParam.addInt(String8("channels"), channels);
3350                        mpClientInterface->setParameters(mTestOutputs[mCurOutput], outputParam.toString());
3351                    }
3352                }
3353            }
3354            if (param.getInt(String8("test_cmd_policy_sampleRate"), valueInt) == NO_ERROR) {
3355                param.remove(String8("test_cmd_policy_sampleRate"));
3356                if (valueInt >= 0 && valueInt <= 96000) {
3357                    int samplingRate = valueInt;
3358                    if (target == "Manager") {
3359                        mTestSamplingRate = samplingRate;
3360                    } else if (mTestOutputs[mCurOutput] != 0) {
3361                        AudioParameter outputParam = AudioParameter();
3362                        outputParam.addInt(String8("sampling_rate"), samplingRate);
3363                        mpClientInterface->setParameters(mTestOutputs[mCurOutput], outputParam.toString());
3364                    }
3365                }
3366            }
3367
3368            if (param.get(String8("test_cmd_policy_reopen"), value) == NO_ERROR) {
3369                param.remove(String8("test_cmd_policy_reopen"));
3370
3371                sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(mPrimaryOutput);
3372                mpClientInterface->closeOutput(mPrimaryOutput);
3373
3374                audio_module_handle_t moduleHandle = outputDesc->mModule->mHandle;
3375
3376                mOutputs.removeItem(mPrimaryOutput);
3377
3378                sp<AudioOutputDescriptor> outputDesc = new AudioOutputDescriptor(NULL);
3379                outputDesc->mDevice = AUDIO_DEVICE_OUT_SPEAKER;
3380                audio_config_t config = AUDIO_CONFIG_INITIALIZER;
3381                config.sample_rate = outputDesc->mSamplingRate;
3382                config.channel_mask = outputDesc->mChannelMask;
3383                config.format = outputDesc->mFormat;
3384                status_t status = mpClientInterface->openOutput(moduleHandle,
3385                                                                &mPrimaryOutput,
3386                                                                &config,
3387                                                                &outputDesc->mDevice,
3388                                                                String8(""),
3389                                                                &outputDesc->mLatency,
3390                                                                outputDesc->mFlags);
3391                if (status != NO_ERROR) {
3392                    ALOGE("Failed to reopen hardware output stream, "
3393                        "samplingRate: %d, format %d, channels %d",
3394                        outputDesc->mSamplingRate, outputDesc->mFormat, outputDesc->mChannelMask);
3395                } else {
3396                    outputDesc->mSamplingRate = config.sample_rate;
3397                    outputDesc->mChannelMask = config.channel_mask;
3398                    outputDesc->mFormat = config.format;
3399                    AudioParameter outputCmd = AudioParameter();
3400                    outputCmd.addInt(String8("set_id"), 0);
3401                    mpClientInterface->setParameters(mPrimaryOutput, outputCmd.toString());
3402                    addOutput(mPrimaryOutput, outputDesc);
3403                }
3404            }
3405
3406
3407            mpClientInterface->setParameters(0, String8("test_cmd_policy="));
3408        }
3409    }
3410    return false;
3411}
3412
3413void AudioPolicyManager::exit()
3414{
3415    {
3416        AutoMutex _l(mLock);
3417        requestExit();
3418        mWaitWorkCV.signal();
3419    }
3420    requestExitAndWait();
3421}
3422
3423int AudioPolicyManager::testOutputIndex(audio_io_handle_t output)
3424{
3425    for (int i = 0; i < NUM_TEST_OUTPUTS; i++) {
3426        if (output == mTestOutputs[i]) return i;
3427    }
3428    return 0;
3429}
3430#endif //AUDIO_POLICY_TEST
3431
3432// ---
3433
3434void AudioPolicyManager::addOutput(audio_io_handle_t output, sp<AudioOutputDescriptor> outputDesc)
3435{
3436    outputDesc->mIoHandle = output;
3437    outputDesc->mId = nextUniqueId();
3438    mOutputs.add(output, outputDesc);
3439    nextAudioPortGeneration();
3440}
3441
3442void AudioPolicyManager::addInput(audio_io_handle_t input, sp<AudioInputDescriptor> inputDesc)
3443{
3444    inputDesc->mIoHandle = input;
3445    inputDesc->mId = nextUniqueId();
3446    mInputs.add(input, inputDesc);
3447    nextAudioPortGeneration();
3448}
3449
3450void AudioPolicyManager::findIoHandlesByAddress(sp<AudioOutputDescriptor> desc /*in*/,
3451        const audio_devices_t device /*in*/,
3452        const String8 address /*in*/,
3453        SortedVector<audio_io_handle_t>& outputs /*out*/) {
3454    sp<DeviceDescriptor> devDesc =
3455        desc->mProfile->mSupportedDevices.getDevice(device, address);
3456    if (devDesc != 0) {
3457        ALOGV("findIoHandlesByAddress(): adding opened output %d on same address %s",
3458              desc->mIoHandle, address.string());
3459        outputs.add(desc->mIoHandle);
3460    }
3461}
3462
3463status_t AudioPolicyManager::checkOutputsForDevice(const sp<DeviceDescriptor> devDesc,
3464                                                       audio_policy_dev_state_t state,
3465                                                       SortedVector<audio_io_handle_t>& outputs,
3466                                                       const String8 address)
3467{
3468    audio_devices_t device = devDesc->mDeviceType;
3469    sp<AudioOutputDescriptor> desc;
3470    // erase all current sample rates, formats and channel masks
3471    devDesc->clearCapabilities();
3472
3473    if (state == AUDIO_POLICY_DEVICE_STATE_AVAILABLE) {
3474        // first list already open outputs that can be routed to this device
3475        for (size_t i = 0; i < mOutputs.size(); i++) {
3476            desc = mOutputs.valueAt(i);
3477            if (!desc->isDuplicated() && (desc->mProfile->mSupportedDevices.types() & device)) {
3478                if (!deviceDistinguishesOnAddress(device)) {
3479                    ALOGV("checkOutputsForDevice(): adding opened output %d", mOutputs.keyAt(i));
3480                    outputs.add(mOutputs.keyAt(i));
3481                } else {
3482                    ALOGV("  checking address match due to device 0x%x", device);
3483                    findIoHandlesByAddress(desc, device, address, outputs);
3484                }
3485            }
3486        }
3487        // then look for output profiles that can be routed to this device
3488        SortedVector< sp<IOProfile> > profiles;
3489        for (size_t i = 0; i < mHwModules.size(); i++)
3490        {
3491            if (mHwModules[i]->mHandle == 0) {
3492                continue;
3493            }
3494            for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
3495            {
3496                sp<IOProfile> profile = mHwModules[i]->mOutputProfiles[j];
3497                if (profile->mSupportedDevices.types() & device) {
3498                    if (!deviceDistinguishesOnAddress(device) ||
3499                            address == profile->mSupportedDevices[0]->mAddress) {
3500                        profiles.add(profile);
3501                        ALOGV("checkOutputsForDevice(): adding profile %zu from module %zu", j, i);
3502                    }
3503                }
3504            }
3505        }
3506
3507        ALOGV("  found %d profiles, %d outputs", profiles.size(), outputs.size());
3508
3509        if (profiles.isEmpty() && outputs.isEmpty()) {
3510            ALOGW("checkOutputsForDevice(): No output available for device %04x", device);
3511            return BAD_VALUE;
3512        }
3513
3514        // open outputs for matching profiles if needed. Direct outputs are also opened to
3515        // query for dynamic parameters and will be closed later by setDeviceConnectionState()
3516        for (ssize_t profile_index = 0; profile_index < (ssize_t)profiles.size(); profile_index++) {
3517            sp<IOProfile> profile = profiles[profile_index];
3518
3519            // nothing to do if one output is already opened for this profile
3520            size_t j;
3521            for (j = 0; j < outputs.size(); j++) {
3522                desc = mOutputs.valueFor(outputs.itemAt(j));
3523                if (!desc->isDuplicated() && desc->mProfile == profile) {
3524                    // matching profile: save the sample rates, format and channel masks supported
3525                    // by the profile in our device descriptor
3526                    devDesc->importAudioPort(profile);
3527                    break;
3528                }
3529            }
3530            if (j != outputs.size()) {
3531                continue;
3532            }
3533
3534            ALOGV("opening output for device %08x with params %s profile %p",
3535                                                      device, address.string(), profile.get());
3536            desc = new AudioOutputDescriptor(profile);
3537            desc->mDevice = device;
3538            audio_config_t config = AUDIO_CONFIG_INITIALIZER;
3539            config.sample_rate = desc->mSamplingRate;
3540            config.channel_mask = desc->mChannelMask;
3541            config.format = desc->mFormat;
3542            config.offload_info.sample_rate = desc->mSamplingRate;
3543            config.offload_info.channel_mask = desc->mChannelMask;
3544            config.offload_info.format = desc->mFormat;
3545            audio_io_handle_t output = AUDIO_IO_HANDLE_NONE;
3546            status_t status = mpClientInterface->openOutput(profile->mModule->mHandle,
3547                                                            &output,
3548                                                            &config,
3549                                                            &desc->mDevice,
3550                                                            address,
3551                                                            &desc->mLatency,
3552                                                            desc->mFlags);
3553            if (status == NO_ERROR) {
3554                desc->mSamplingRate = config.sample_rate;
3555                desc->mChannelMask = config.channel_mask;
3556                desc->mFormat = config.format;
3557
3558                // Here is where the out_set_parameters() for card & device gets called
3559                if (!address.isEmpty()) {
3560                    char *param = audio_device_address_to_parameter(device, address);
3561                    mpClientInterface->setParameters(output, String8(param));
3562                    free(param);
3563                }
3564
3565                // Here is where we step through and resolve any "dynamic" fields
3566                String8 reply;
3567                char *value;
3568                if (profile->mSamplingRates[0] == 0) {
3569                    reply = mpClientInterface->getParameters(output,
3570                                            String8(AUDIO_PARAMETER_STREAM_SUP_SAMPLING_RATES));
3571                    ALOGV("checkOutputsForDevice() supported sampling rates %s",
3572                              reply.string());
3573                    value = strpbrk((char *)reply.string(), "=");
3574                    if (value != NULL) {
3575                        profile->loadSamplingRates(value + 1);
3576                    }
3577                }
3578                if (profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) {
3579                    reply = mpClientInterface->getParameters(output,
3580                                                   String8(AUDIO_PARAMETER_STREAM_SUP_FORMATS));
3581                    ALOGV("checkOutputsForDevice() supported formats %s",
3582                              reply.string());
3583                    value = strpbrk((char *)reply.string(), "=");
3584                    if (value != NULL) {
3585                        profile->loadFormats(value + 1);
3586                    }
3587                }
3588                if (profile->mChannelMasks[0] == 0) {
3589                    reply = mpClientInterface->getParameters(output,
3590                                                  String8(AUDIO_PARAMETER_STREAM_SUP_CHANNELS));
3591                    ALOGV("checkOutputsForDevice() supported channel masks %s",
3592                              reply.string());
3593                    value = strpbrk((char *)reply.string(), "=");
3594                    if (value != NULL) {
3595                        profile->loadOutChannels(value + 1);
3596                    }
3597                }
3598                if (((profile->mSamplingRates[0] == 0) &&
3599                         (profile->mSamplingRates.size() < 2)) ||
3600                     ((profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) &&
3601                         (profile->mFormats.size() < 2)) ||
3602                     ((profile->mChannelMasks[0] == 0) &&
3603                         (profile->mChannelMasks.size() < 2))) {
3604                    ALOGW("checkOutputsForDevice() missing param");
3605                    mpClientInterface->closeOutput(output);
3606                    output = AUDIO_IO_HANDLE_NONE;
3607                } else if (profile->mSamplingRates[0] == 0 || profile->mFormats[0] == 0 ||
3608                            profile->mChannelMasks[0] == 0) {
3609                    mpClientInterface->closeOutput(output);
3610                    config.sample_rate = profile->pickSamplingRate();
3611                    config.channel_mask = profile->pickChannelMask();
3612                    config.format = profile->pickFormat();
3613                    config.offload_info.sample_rate = config.sample_rate;
3614                    config.offload_info.channel_mask = config.channel_mask;
3615                    config.offload_info.format = config.format;
3616                    status = mpClientInterface->openOutput(profile->mModule->mHandle,
3617                                                           &output,
3618                                                           &config,
3619                                                           &desc->mDevice,
3620                                                           address,
3621                                                           &desc->mLatency,
3622                                                           desc->mFlags);
3623                    if (status == NO_ERROR) {
3624                        desc->mSamplingRate = config.sample_rate;
3625                        desc->mChannelMask = config.channel_mask;
3626                        desc->mFormat = config.format;
3627                    } else {
3628                        output = AUDIO_IO_HANDLE_NONE;
3629                    }
3630                }
3631
3632                if (output != AUDIO_IO_HANDLE_NONE) {
3633                    addOutput(output, desc);
3634                    if (deviceDistinguishesOnAddress(device) && address != "0") {
3635                        ssize_t index = mPolicyMixes.indexOfKey(address);
3636                        if (index >= 0) {
3637                            mPolicyMixes[index]->mOutput = desc;
3638                            desc->mPolicyMix = &mPolicyMixes[index]->mMix;
3639                        } else {
3640                            ALOGE("checkOutputsForDevice() cannot find policy for address %s",
3641                                  address.string());
3642                        }
3643                    } else if ((desc->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) == 0) {
3644                        // no duplicated output for direct outputs and
3645                        // outputs used by dynamic policy mixes
3646                        audio_io_handle_t duplicatedOutput = AUDIO_IO_HANDLE_NONE;
3647
3648                        // set initial stream volume for device
3649                        applyStreamVolumes(output, device, 0, true);
3650
3651                        //TODO: configure audio effect output stage here
3652
3653                        // open a duplicating output thread for the new output and the primary output
3654                        duplicatedOutput = mpClientInterface->openDuplicateOutput(output,
3655                                                                                  mPrimaryOutput);
3656                        if (duplicatedOutput != AUDIO_IO_HANDLE_NONE) {
3657                            // add duplicated output descriptor
3658                            sp<AudioOutputDescriptor> dupOutputDesc =
3659                                    new AudioOutputDescriptor(NULL);
3660                            dupOutputDesc->mOutput1 = mOutputs.valueFor(mPrimaryOutput);
3661                            dupOutputDesc->mOutput2 = mOutputs.valueFor(output);
3662                            dupOutputDesc->mSamplingRate = desc->mSamplingRate;
3663                            dupOutputDesc->mFormat = desc->mFormat;
3664                            dupOutputDesc->mChannelMask = desc->mChannelMask;
3665                            dupOutputDesc->mLatency = desc->mLatency;
3666                            addOutput(duplicatedOutput, dupOutputDesc);
3667                            applyStreamVolumes(duplicatedOutput, device, 0, true);
3668                        } else {
3669                            ALOGW("checkOutputsForDevice() could not open dup output for %d and %d",
3670                                    mPrimaryOutput, output);
3671                            mpClientInterface->closeOutput(output);
3672                            mOutputs.removeItem(output);
3673                            nextAudioPortGeneration();
3674                            output = AUDIO_IO_HANDLE_NONE;
3675                        }
3676                    }
3677                }
3678            } else {
3679                output = AUDIO_IO_HANDLE_NONE;
3680            }
3681            if (output == AUDIO_IO_HANDLE_NONE) {
3682                ALOGW("checkOutputsForDevice() could not open output for device %x", device);
3683                profiles.removeAt(profile_index);
3684                profile_index--;
3685            } else {
3686                outputs.add(output);
3687                devDesc->importAudioPort(profile);
3688
3689                if (deviceDistinguishesOnAddress(device)) {
3690                    ALOGV("checkOutputsForDevice(): setOutputDevice(dev=0x%x, addr=%s)",
3691                            device, address.string());
3692                    setOutputDevice(output, device, true/*force*/, 0/*delay*/,
3693                            NULL/*patch handle*/, address.string());
3694                }
3695                ALOGV("checkOutputsForDevice(): adding output %d", output);
3696            }
3697        }
3698
3699        if (profiles.isEmpty()) {
3700            ALOGW("checkOutputsForDevice(): No output available for device %04x", device);
3701            return BAD_VALUE;
3702        }
3703    } else { // Disconnect
3704        // check if one opened output is not needed any more after disconnecting one device
3705        for (size_t i = 0; i < mOutputs.size(); i++) {
3706            desc = mOutputs.valueAt(i);
3707            if (!desc->isDuplicated()) {
3708                // exact match on device
3709                if (deviceDistinguishesOnAddress(device) &&
3710                        (desc->mProfile->mSupportedDevices.types() == device)) {
3711                    findIoHandlesByAddress(desc, device, address, outputs);
3712                } else if (!(desc->mProfile->mSupportedDevices.types()
3713                        & mAvailableOutputDevices.types())) {
3714                    ALOGV("checkOutputsForDevice(): disconnecting adding output %d",
3715                            mOutputs.keyAt(i));
3716                    outputs.add(mOutputs.keyAt(i));
3717                }
3718            }
3719        }
3720        // Clear any profiles associated with the disconnected device.
3721        for (size_t i = 0; i < mHwModules.size(); i++)
3722        {
3723            if (mHwModules[i]->mHandle == 0) {
3724                continue;
3725            }
3726            for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
3727            {
3728                sp<IOProfile> profile = mHwModules[i]->mOutputProfiles[j];
3729                if (profile->mSupportedDevices.types() & device) {
3730                    ALOGV("checkOutputsForDevice(): "
3731                            "clearing direct output profile %zu on module %zu", j, i);
3732                    if (profile->mSamplingRates[0] == 0) {
3733                        profile->mSamplingRates.clear();
3734                        profile->mSamplingRates.add(0);
3735                    }
3736                    if (profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) {
3737                        profile->mFormats.clear();
3738                        profile->mFormats.add(AUDIO_FORMAT_DEFAULT);
3739                    }
3740                    if (profile->mChannelMasks[0] == 0) {
3741                        profile->mChannelMasks.clear();
3742                        profile->mChannelMasks.add(0);
3743                    }
3744                }
3745            }
3746        }
3747    }
3748    return NO_ERROR;
3749}
3750
3751status_t AudioPolicyManager::checkInputsForDevice(audio_devices_t device,
3752                                                      audio_policy_dev_state_t state,
3753                                                      SortedVector<audio_io_handle_t>& inputs,
3754                                                      const String8 address)
3755{
3756    sp<AudioInputDescriptor> desc;
3757    if (state == AUDIO_POLICY_DEVICE_STATE_AVAILABLE) {
3758        // first list already open inputs that can be routed to this device
3759        for (size_t input_index = 0; input_index < mInputs.size(); input_index++) {
3760            desc = mInputs.valueAt(input_index);
3761            if (desc->mProfile->mSupportedDevices.types() & (device & ~AUDIO_DEVICE_BIT_IN)) {
3762                ALOGV("checkInputsForDevice(): adding opened input %d", mInputs.keyAt(input_index));
3763               inputs.add(mInputs.keyAt(input_index));
3764            }
3765        }
3766
3767        // then look for input profiles that can be routed to this device
3768        SortedVector< sp<IOProfile> > profiles;
3769        for (size_t module_idx = 0; module_idx < mHwModules.size(); module_idx++)
3770        {
3771            if (mHwModules[module_idx]->mHandle == 0) {
3772                continue;
3773            }
3774            for (size_t profile_index = 0;
3775                 profile_index < mHwModules[module_idx]->mInputProfiles.size();
3776                 profile_index++)
3777            {
3778                sp<IOProfile> profile = mHwModules[module_idx]->mInputProfiles[profile_index];
3779
3780                if (profile->mSupportedDevices.types() & (device & ~AUDIO_DEVICE_BIT_IN)) {
3781                    if (!deviceDistinguishesOnAddress(device) ||
3782                            address == profile->mSupportedDevices[0]->mAddress) {
3783                        profiles.add(profile);
3784                        ALOGV("checkInputsForDevice(): adding profile %zu from module %zu",
3785                              profile_index, module_idx);
3786                    }
3787                }
3788            }
3789        }
3790
3791        if (profiles.isEmpty() && inputs.isEmpty()) {
3792            ALOGW("checkInputsForDevice(): No input available for device 0x%X", device);
3793            return BAD_VALUE;
3794        }
3795
3796        // open inputs for matching profiles if needed. Direct inputs are also opened to
3797        // query for dynamic parameters and will be closed later by setDeviceConnectionState()
3798        for (ssize_t profile_index = 0; profile_index < (ssize_t)profiles.size(); profile_index++) {
3799
3800            sp<IOProfile> profile = profiles[profile_index];
3801            // nothing to do if one input is already opened for this profile
3802            size_t input_index;
3803            for (input_index = 0; input_index < mInputs.size(); input_index++) {
3804                desc = mInputs.valueAt(input_index);
3805                if (desc->mProfile == profile) {
3806                    break;
3807                }
3808            }
3809            if (input_index != mInputs.size()) {
3810                continue;
3811            }
3812
3813            ALOGV("opening input for device 0x%X with params %s", device, address.string());
3814            desc = new AudioInputDescriptor(profile);
3815            desc->mDevice = device;
3816            audio_config_t config = AUDIO_CONFIG_INITIALIZER;
3817            config.sample_rate = desc->mSamplingRate;
3818            config.channel_mask = desc->mChannelMask;
3819            config.format = desc->mFormat;
3820            audio_io_handle_t input = AUDIO_IO_HANDLE_NONE;
3821            status_t status = mpClientInterface->openInput(profile->mModule->mHandle,
3822                                                           &input,
3823                                                           &config,
3824                                                           &desc->mDevice,
3825                                                           address,
3826                                                           AUDIO_SOURCE_MIC,
3827                                                           AUDIO_INPUT_FLAG_NONE /*FIXME*/);
3828
3829            if (status == NO_ERROR) {
3830                desc->mSamplingRate = config.sample_rate;
3831                desc->mChannelMask = config.channel_mask;
3832                desc->mFormat = config.format;
3833
3834                if (!address.isEmpty()) {
3835                    char *param = audio_device_address_to_parameter(device, address);
3836                    mpClientInterface->setParameters(input, String8(param));
3837                    free(param);
3838                }
3839
3840                // Here is where we step through and resolve any "dynamic" fields
3841                String8 reply;
3842                char *value;
3843                if (profile->mSamplingRates[0] == 0) {
3844                    reply = mpClientInterface->getParameters(input,
3845                                            String8(AUDIO_PARAMETER_STREAM_SUP_SAMPLING_RATES));
3846                    ALOGV("checkInputsForDevice() direct input sup sampling rates %s",
3847                              reply.string());
3848                    value = strpbrk((char *)reply.string(), "=");
3849                    if (value != NULL) {
3850                        profile->loadSamplingRates(value + 1);
3851                    }
3852                }
3853                if (profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) {
3854                    reply = mpClientInterface->getParameters(input,
3855                                                   String8(AUDIO_PARAMETER_STREAM_SUP_FORMATS));
3856                    ALOGV("checkInputsForDevice() direct input sup formats %s", reply.string());
3857                    value = strpbrk((char *)reply.string(), "=");
3858                    if (value != NULL) {
3859                        profile->loadFormats(value + 1);
3860                    }
3861                }
3862                if (profile->mChannelMasks[0] == 0) {
3863                    reply = mpClientInterface->getParameters(input,
3864                                                  String8(AUDIO_PARAMETER_STREAM_SUP_CHANNELS));
3865                    ALOGV("checkInputsForDevice() direct input sup channel masks %s",
3866                              reply.string());
3867                    value = strpbrk((char *)reply.string(), "=");
3868                    if (value != NULL) {
3869                        profile->loadInChannels(value + 1);
3870                    }
3871                }
3872                if (((profile->mSamplingRates[0] == 0) && (profile->mSamplingRates.size() < 2)) ||
3873                     ((profile->mFormats[0] == 0) && (profile->mFormats.size() < 2)) ||
3874                     ((profile->mChannelMasks[0] == 0) && (profile->mChannelMasks.size() < 2))) {
3875                    ALOGW("checkInputsForDevice() direct input missing param");
3876                    mpClientInterface->closeInput(input);
3877                    input = AUDIO_IO_HANDLE_NONE;
3878                }
3879
3880                if (input != 0) {
3881                    addInput(input, desc);
3882                }
3883            } // endif input != 0
3884
3885            if (input == AUDIO_IO_HANDLE_NONE) {
3886                ALOGW("checkInputsForDevice() could not open input for device 0x%X", device);
3887                profiles.removeAt(profile_index);
3888                profile_index--;
3889            } else {
3890                inputs.add(input);
3891                ALOGV("checkInputsForDevice(): adding input %d", input);
3892            }
3893        } // end scan profiles
3894
3895        if (profiles.isEmpty()) {
3896            ALOGW("checkInputsForDevice(): No input available for device 0x%X", device);
3897            return BAD_VALUE;
3898        }
3899    } else {
3900        // Disconnect
3901        // check if one opened input is not needed any more after disconnecting one device
3902        for (size_t input_index = 0; input_index < mInputs.size(); input_index++) {
3903            desc = mInputs.valueAt(input_index);
3904            if (!(desc->mProfile->mSupportedDevices.types() & mAvailableInputDevices.types() &
3905                    ~AUDIO_DEVICE_BIT_IN)) {
3906                ALOGV("checkInputsForDevice(): disconnecting adding input %d",
3907                      mInputs.keyAt(input_index));
3908                inputs.add(mInputs.keyAt(input_index));
3909            }
3910        }
3911        // Clear any profiles associated with the disconnected device.
3912        for (size_t module_index = 0; module_index < mHwModules.size(); module_index++) {
3913            if (mHwModules[module_index]->mHandle == 0) {
3914                continue;
3915            }
3916            for (size_t profile_index = 0;
3917                 profile_index < mHwModules[module_index]->mInputProfiles.size();
3918                 profile_index++) {
3919                sp<IOProfile> profile = mHwModules[module_index]->mInputProfiles[profile_index];
3920                if (profile->mSupportedDevices.types() & device & ~AUDIO_DEVICE_BIT_IN) {
3921                    ALOGV("checkInputsForDevice(): clearing direct input profile %zu on module %zu",
3922                          profile_index, module_index);
3923                    if (profile->mSamplingRates[0] == 0) {
3924                        profile->mSamplingRates.clear();
3925                        profile->mSamplingRates.add(0);
3926                    }
3927                    if (profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) {
3928                        profile->mFormats.clear();
3929                        profile->mFormats.add(AUDIO_FORMAT_DEFAULT);
3930                    }
3931                    if (profile->mChannelMasks[0] == 0) {
3932                        profile->mChannelMasks.clear();
3933                        profile->mChannelMasks.add(0);
3934                    }
3935                }
3936            }
3937        }
3938    } // end disconnect
3939
3940    return NO_ERROR;
3941}
3942
3943
3944void AudioPolicyManager::closeOutput(audio_io_handle_t output)
3945{
3946    ALOGV("closeOutput(%d)", output);
3947
3948    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
3949    if (outputDesc == NULL) {
3950        ALOGW("closeOutput() unknown output %d", output);
3951        return;
3952    }
3953
3954    for (size_t i = 0; i < mPolicyMixes.size(); i++) {
3955        if (mPolicyMixes[i]->mOutput == outputDesc) {
3956            mPolicyMixes[i]->mOutput.clear();
3957        }
3958    }
3959
3960    // look for duplicated outputs connected to the output being removed.
3961    for (size_t i = 0; i < mOutputs.size(); i++) {
3962        sp<AudioOutputDescriptor> dupOutputDesc = mOutputs.valueAt(i);
3963        if (dupOutputDesc->isDuplicated() &&
3964                (dupOutputDesc->mOutput1 == outputDesc ||
3965                dupOutputDesc->mOutput2 == outputDesc)) {
3966            sp<AudioOutputDescriptor> outputDesc2;
3967            if (dupOutputDesc->mOutput1 == outputDesc) {
3968                outputDesc2 = dupOutputDesc->mOutput2;
3969            } else {
3970                outputDesc2 = dupOutputDesc->mOutput1;
3971            }
3972            // As all active tracks on duplicated output will be deleted,
3973            // and as they were also referenced on the other output, the reference
3974            // count for their stream type must be adjusted accordingly on
3975            // the other output.
3976            for (int j = 0; j < AUDIO_STREAM_CNT; j++) {
3977                int refCount = dupOutputDesc->mRefCount[j];
3978                outputDesc2->changeRefCount((audio_stream_type_t)j,-refCount);
3979            }
3980            audio_io_handle_t duplicatedOutput = mOutputs.keyAt(i);
3981            ALOGV("closeOutput() closing also duplicated output %d", duplicatedOutput);
3982
3983            mpClientInterface->closeOutput(duplicatedOutput);
3984            mOutputs.removeItem(duplicatedOutput);
3985        }
3986    }
3987
3988    nextAudioPortGeneration();
3989
3990    ssize_t index = mAudioPatches.indexOfKey(outputDesc->mPatchHandle);
3991    if (index >= 0) {
3992        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
3993        status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, 0);
3994        mAudioPatches.removeItemsAt(index);
3995        mpClientInterface->onAudioPatchListUpdate();
3996    }
3997
3998    AudioParameter param;
3999    param.add(String8("closing"), String8("true"));
4000    mpClientInterface->setParameters(output, param.toString());
4001
4002    mpClientInterface->closeOutput(output);
4003    mOutputs.removeItem(output);
4004    mPreviousOutputs = mOutputs;
4005}
4006
4007void AudioPolicyManager::closeInput(audio_io_handle_t input)
4008{
4009    ALOGV("closeInput(%d)", input);
4010
4011    sp<AudioInputDescriptor> inputDesc = mInputs.valueFor(input);
4012    if (inputDesc == NULL) {
4013        ALOGW("closeInput() unknown input %d", input);
4014        return;
4015    }
4016
4017    nextAudioPortGeneration();
4018
4019    ssize_t index = mAudioPatches.indexOfKey(inputDesc->mPatchHandle);
4020    if (index >= 0) {
4021        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
4022        status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, 0);
4023        mAudioPatches.removeItemsAt(index);
4024        mpClientInterface->onAudioPatchListUpdate();
4025    }
4026
4027    mpClientInterface->closeInput(input);
4028    mInputs.removeItem(input);
4029}
4030
4031SortedVector<audio_io_handle_t> AudioPolicyManager::getOutputsForDevice(audio_devices_t device,
4032                        DefaultKeyedVector<audio_io_handle_t, sp<AudioOutputDescriptor> > openOutputs)
4033{
4034    SortedVector<audio_io_handle_t> outputs;
4035
4036    ALOGVV("getOutputsForDevice() device %04x", device);
4037    for (size_t i = 0; i < openOutputs.size(); i++) {
4038        ALOGVV("output %d isDuplicated=%d device=%04x",
4039                i, openOutputs.valueAt(i)->isDuplicated(), openOutputs.valueAt(i)->supportedDevices());
4040        if ((device & openOutputs.valueAt(i)->supportedDevices()) == device) {
4041            ALOGVV("getOutputsForDevice() found output %d", openOutputs.keyAt(i));
4042            outputs.add(openOutputs.keyAt(i));
4043        }
4044    }
4045    return outputs;
4046}
4047
4048bool AudioPolicyManager::vectorsEqual(SortedVector<audio_io_handle_t>& outputs1,
4049                                   SortedVector<audio_io_handle_t>& outputs2)
4050{
4051    if (outputs1.size() != outputs2.size()) {
4052        return false;
4053    }
4054    for (size_t i = 0; i < outputs1.size(); i++) {
4055        if (outputs1[i] != outputs2[i]) {
4056            return false;
4057        }
4058    }
4059    return true;
4060}
4061
4062void AudioPolicyManager::checkOutputForStrategy(routing_strategy strategy)
4063{
4064    audio_devices_t oldDevice = getDeviceForStrategy(strategy, true /*fromCache*/);
4065    audio_devices_t newDevice = getDeviceForStrategy(strategy, false /*fromCache*/);
4066    SortedVector<audio_io_handle_t> srcOutputs = getOutputsForDevice(oldDevice, mPreviousOutputs);
4067    SortedVector<audio_io_handle_t> dstOutputs = getOutputsForDevice(newDevice, mOutputs);
4068
4069    // also take into account external policy-related changes: add all outputs which are
4070    // associated with policies in the "before" and "after" output vectors
4071    ALOGVV("checkOutputForStrategy(): policy related outputs");
4072    for (size_t i = 0 ; i < mPreviousOutputs.size() ; i++) {
4073        const sp<AudioOutputDescriptor> desc = mPreviousOutputs.valueAt(i);
4074        if (desc != 0 && desc->mPolicyMix != NULL) {
4075            srcOutputs.add(desc->mIoHandle);
4076            ALOGVV(" previous outputs: adding %d", desc->mIoHandle);
4077        }
4078    }
4079    for (size_t i = 0 ; i < mOutputs.size() ; i++) {
4080        const sp<AudioOutputDescriptor> desc = mOutputs.valueAt(i);
4081        if (desc != 0 && desc->mPolicyMix != NULL) {
4082            dstOutputs.add(desc->mIoHandle);
4083            ALOGVV(" new outputs: adding %d", desc->mIoHandle);
4084        }
4085    }
4086
4087    if (!vectorsEqual(srcOutputs,dstOutputs)) {
4088        ALOGV("checkOutputForStrategy() strategy %d, moving from output %d to output %d",
4089              strategy, srcOutputs[0], dstOutputs[0]);
4090        // mute strategy while moving tracks from one output to another
4091        for (size_t i = 0; i < srcOutputs.size(); i++) {
4092            sp<AudioOutputDescriptor> desc = mOutputs.valueFor(srcOutputs[i]);
4093            if (desc->isStrategyActive(strategy)) {
4094                setStrategyMute(strategy, true, srcOutputs[i]);
4095                setStrategyMute(strategy, false, srcOutputs[i], MUTE_TIME_MS, newDevice);
4096            }
4097        }
4098
4099        // Move effects associated to this strategy from previous output to new output
4100        if (strategy == STRATEGY_MEDIA) {
4101            audio_io_handle_t fxOutput = selectOutputForEffects(dstOutputs);
4102            SortedVector<audio_io_handle_t> moved;
4103            for (size_t i = 0; i < mEffects.size(); i++) {
4104                sp<EffectDescriptor> effectDesc = mEffects.valueAt(i);
4105                if (effectDesc->mSession == AUDIO_SESSION_OUTPUT_MIX &&
4106                        effectDesc->mIo != fxOutput) {
4107                    if (moved.indexOf(effectDesc->mIo) < 0) {
4108                        ALOGV("checkOutputForStrategy() moving effect %d to output %d",
4109                              mEffects.keyAt(i), fxOutput);
4110                        mpClientInterface->moveEffects(AUDIO_SESSION_OUTPUT_MIX, effectDesc->mIo,
4111                                                       fxOutput);
4112                        moved.add(effectDesc->mIo);
4113                    }
4114                    effectDesc->mIo = fxOutput;
4115                }
4116            }
4117        }
4118        // Move tracks associated to this strategy from previous output to new output
4119        for (int i = 0; i < AUDIO_STREAM_CNT; i++) {
4120            if (i == AUDIO_STREAM_PATCH) {
4121                continue;
4122            }
4123            if (getStrategy((audio_stream_type_t)i) == strategy) {
4124                mpClientInterface->invalidateStream((audio_stream_type_t)i);
4125            }
4126        }
4127    }
4128}
4129
4130void AudioPolicyManager::checkOutputForAllStrategies()
4131{
4132    if (mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] == AUDIO_POLICY_FORCE_SYSTEM_ENFORCED)
4133        checkOutputForStrategy(STRATEGY_ENFORCED_AUDIBLE);
4134    checkOutputForStrategy(STRATEGY_PHONE);
4135    if (mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] != AUDIO_POLICY_FORCE_SYSTEM_ENFORCED)
4136        checkOutputForStrategy(STRATEGY_ENFORCED_AUDIBLE);
4137    checkOutputForStrategy(STRATEGY_SONIFICATION);
4138    checkOutputForStrategy(STRATEGY_SONIFICATION_RESPECTFUL);
4139    checkOutputForStrategy(STRATEGY_ACCESSIBILITY);
4140    checkOutputForStrategy(STRATEGY_MEDIA);
4141    checkOutputForStrategy(STRATEGY_DTMF);
4142    checkOutputForStrategy(STRATEGY_REROUTING);
4143}
4144
4145audio_io_handle_t AudioPolicyManager::getA2dpOutput()
4146{
4147    for (size_t i = 0; i < mOutputs.size(); i++) {
4148        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(i);
4149        if (!outputDesc->isDuplicated() && outputDesc->device() & AUDIO_DEVICE_OUT_ALL_A2DP) {
4150            return mOutputs.keyAt(i);
4151        }
4152    }
4153
4154    return 0;
4155}
4156
4157void AudioPolicyManager::checkA2dpSuspend()
4158{
4159    audio_io_handle_t a2dpOutput = getA2dpOutput();
4160    if (a2dpOutput == 0) {
4161        mA2dpSuspended = false;
4162        return;
4163    }
4164
4165    bool isScoConnected =
4166            ((mAvailableInputDevices.types() & AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET &
4167                    ~AUDIO_DEVICE_BIT_IN) != 0) ||
4168            ((mAvailableOutputDevices.types() & AUDIO_DEVICE_OUT_ALL_SCO) != 0);
4169    // suspend A2DP output if:
4170    //      (NOT already suspended) &&
4171    //      ((SCO device is connected &&
4172    //       (forced usage for communication || for record is SCO))) ||
4173    //      (phone state is ringing || in call)
4174    //
4175    // restore A2DP output if:
4176    //      (Already suspended) &&
4177    //      ((SCO device is NOT connected ||
4178    //       (forced usage NOT for communication && NOT for record is SCO))) &&
4179    //      (phone state is NOT ringing && NOT in call)
4180    //
4181    if (mA2dpSuspended) {
4182        if ((!isScoConnected ||
4183             ((mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION] != AUDIO_POLICY_FORCE_BT_SCO) &&
4184              (mForceUse[AUDIO_POLICY_FORCE_FOR_RECORD] != AUDIO_POLICY_FORCE_BT_SCO))) &&
4185             ((mPhoneState != AUDIO_MODE_IN_CALL) &&
4186              (mPhoneState != AUDIO_MODE_RINGTONE))) {
4187
4188            mpClientInterface->restoreOutput(a2dpOutput);
4189            mA2dpSuspended = false;
4190        }
4191    } else {
4192        if ((isScoConnected &&
4193             ((mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION] == AUDIO_POLICY_FORCE_BT_SCO) ||
4194              (mForceUse[AUDIO_POLICY_FORCE_FOR_RECORD] == AUDIO_POLICY_FORCE_BT_SCO))) ||
4195             ((mPhoneState == AUDIO_MODE_IN_CALL) ||
4196              (mPhoneState == AUDIO_MODE_RINGTONE))) {
4197
4198            mpClientInterface->suspendOutput(a2dpOutput);
4199            mA2dpSuspended = true;
4200        }
4201    }
4202}
4203
4204audio_devices_t AudioPolicyManager::getNewOutputDevice(audio_io_handle_t output, bool fromCache)
4205{
4206    audio_devices_t device = AUDIO_DEVICE_NONE;
4207
4208    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
4209
4210    ssize_t index = mAudioPatches.indexOfKey(outputDesc->mPatchHandle);
4211    if (index >= 0) {
4212        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
4213        if (patchDesc->mUid != mUidCached) {
4214            ALOGV("getNewOutputDevice() device %08x forced by patch %d",
4215                  outputDesc->device(), outputDesc->mPatchHandle);
4216            return outputDesc->device();
4217        }
4218    }
4219
4220    // check the following by order of priority to request a routing change if necessary:
4221    // 1: the strategy enforced audible is active and enforced on the output:
4222    //      use device for strategy enforced audible
4223    // 2: we are in call or the strategy phone is active on the output:
4224    //      use device for strategy phone
4225    // 3: the strategy for enforced audible is active but not enforced on the output:
4226    //      use the device for strategy enforced audible
4227    // 4: the strategy sonification is active on the output:
4228    //      use device for strategy sonification
4229    // 5: the strategy "respectful" sonification is active on the output:
4230    //      use device for strategy "respectful" sonification
4231    // 6: the strategy accessibility is active on the output:
4232    //      use device for strategy accessibility
4233    // 7: the strategy media is active on the output:
4234    //      use device for strategy media
4235    // 8: the strategy DTMF is active on the output:
4236    //      use device for strategy DTMF
4237    // 9: the strategy for beacon, a.k.a. "transmitted through speaker" is active on the output:
4238    //      use device for strategy t-t-s
4239    if (outputDesc->isStrategyActive(STRATEGY_ENFORCED_AUDIBLE) &&
4240        mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] == AUDIO_POLICY_FORCE_SYSTEM_ENFORCED) {
4241        device = getDeviceForStrategy(STRATEGY_ENFORCED_AUDIBLE, fromCache);
4242    } else if (isInCall() ||
4243                    outputDesc->isStrategyActive(STRATEGY_PHONE)) {
4244        device = getDeviceForStrategy(STRATEGY_PHONE, fromCache);
4245    } else if (outputDesc->isStrategyActive(STRATEGY_ENFORCED_AUDIBLE)) {
4246        device = getDeviceForStrategy(STRATEGY_ENFORCED_AUDIBLE, fromCache);
4247    } else if (outputDesc->isStrategyActive(STRATEGY_SONIFICATION)) {
4248        device = getDeviceForStrategy(STRATEGY_SONIFICATION, fromCache);
4249    } else if (outputDesc->isStrategyActive(STRATEGY_SONIFICATION_RESPECTFUL)) {
4250        device = getDeviceForStrategy(STRATEGY_SONIFICATION_RESPECTFUL, fromCache);
4251    } else if (outputDesc->isStrategyActive(STRATEGY_ACCESSIBILITY)) {
4252        device = getDeviceForStrategy(STRATEGY_ACCESSIBILITY, fromCache);
4253    } else if (outputDesc->isStrategyActive(STRATEGY_MEDIA)) {
4254        device = getDeviceForStrategy(STRATEGY_MEDIA, fromCache);
4255    } else if (outputDesc->isStrategyActive(STRATEGY_DTMF)) {
4256        device = getDeviceForStrategy(STRATEGY_DTMF, fromCache);
4257    } else if (outputDesc->isStrategyActive(STRATEGY_TRANSMITTED_THROUGH_SPEAKER)) {
4258        device = getDeviceForStrategy(STRATEGY_TRANSMITTED_THROUGH_SPEAKER, fromCache);
4259    } else if (outputDesc->isStrategyActive(STRATEGY_REROUTING)) {
4260        device = getDeviceForStrategy(STRATEGY_REROUTING, fromCache);
4261    }
4262
4263    ALOGV("getNewOutputDevice() selected device %x", device);
4264    return device;
4265}
4266
4267audio_devices_t AudioPolicyManager::getNewInputDevice(audio_io_handle_t input)
4268{
4269    sp<AudioInputDescriptor> inputDesc = mInputs.valueFor(input);
4270
4271    ssize_t index = mAudioPatches.indexOfKey(inputDesc->mPatchHandle);
4272    if (index >= 0) {
4273        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
4274        if (patchDesc->mUid != mUidCached) {
4275            ALOGV("getNewInputDevice() device %08x forced by patch %d",
4276                  inputDesc->mDevice, inputDesc->mPatchHandle);
4277            return inputDesc->mDevice;
4278        }
4279    }
4280
4281    audio_devices_t device = getDeviceAndMixForInputSource(inputDesc->mInputSource);
4282
4283    ALOGV("getNewInputDevice() selected device %x", device);
4284    return device;
4285}
4286
4287uint32_t AudioPolicyManager::getStrategyForStream(audio_stream_type_t stream) {
4288    return (uint32_t)getStrategy(stream);
4289}
4290
4291audio_devices_t AudioPolicyManager::getDevicesForStream(audio_stream_type_t stream) {
4292    // By checking the range of stream before calling getStrategy, we avoid
4293    // getStrategy's behavior for invalid streams.  getStrategy would do a ALOGE
4294    // and then return STRATEGY_MEDIA, but we want to return the empty set.
4295    if (stream < (audio_stream_type_t) 0 || stream >= AUDIO_STREAM_PUBLIC_CNT) {
4296        return AUDIO_DEVICE_NONE;
4297    }
4298    audio_devices_t devices;
4299    AudioPolicyManager::routing_strategy strategy = getStrategy(stream);
4300    devices = getDeviceForStrategy(strategy, true /*fromCache*/);
4301    SortedVector<audio_io_handle_t> outputs = getOutputsForDevice(devices, mOutputs);
4302    for (size_t i = 0; i < outputs.size(); i++) {
4303        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(outputs[i]);
4304        if (outputDesc->isStrategyActive(strategy)) {
4305            devices = outputDesc->device();
4306            break;
4307        }
4308    }
4309
4310    /*Filter SPEAKER_SAFE out of results, as AudioService doesn't know about it
4311      and doesn't really need to.*/
4312    if (devices & AUDIO_DEVICE_OUT_SPEAKER_SAFE) {
4313        devices |= AUDIO_DEVICE_OUT_SPEAKER;
4314        devices &= ~AUDIO_DEVICE_OUT_SPEAKER_SAFE;
4315    }
4316
4317    return devices;
4318}
4319
4320AudioPolicyManager::routing_strategy AudioPolicyManager::getStrategy(
4321        audio_stream_type_t stream) {
4322
4323    ALOG_ASSERT(stream != AUDIO_STREAM_PATCH,"getStrategy() called for AUDIO_STREAM_PATCH");
4324
4325    // stream to strategy mapping
4326    switch (stream) {
4327    case AUDIO_STREAM_VOICE_CALL:
4328    case AUDIO_STREAM_BLUETOOTH_SCO:
4329        return STRATEGY_PHONE;
4330    case AUDIO_STREAM_RING:
4331    case AUDIO_STREAM_ALARM:
4332        return STRATEGY_SONIFICATION;
4333    case AUDIO_STREAM_NOTIFICATION:
4334        return STRATEGY_SONIFICATION_RESPECTFUL;
4335    case AUDIO_STREAM_DTMF:
4336        return STRATEGY_DTMF;
4337    default:
4338        ALOGE("unknown stream type %d", stream);
4339    case AUDIO_STREAM_SYSTEM:
4340        // NOTE: SYSTEM stream uses MEDIA strategy because muting music and switching outputs
4341        // while key clicks are played produces a poor result
4342    case AUDIO_STREAM_MUSIC:
4343        return STRATEGY_MEDIA;
4344    case AUDIO_STREAM_ENFORCED_AUDIBLE:
4345        return STRATEGY_ENFORCED_AUDIBLE;
4346    case AUDIO_STREAM_TTS:
4347        return STRATEGY_TRANSMITTED_THROUGH_SPEAKER;
4348    case AUDIO_STREAM_ACCESSIBILITY:
4349        return STRATEGY_ACCESSIBILITY;
4350    case AUDIO_STREAM_REROUTING:
4351        return STRATEGY_REROUTING;
4352    }
4353}
4354
4355uint32_t AudioPolicyManager::getStrategyForAttr(const audio_attributes_t *attr) {
4356    // flags to strategy mapping
4357    if ((attr->flags & AUDIO_FLAG_BEACON) == AUDIO_FLAG_BEACON) {
4358        return (uint32_t) STRATEGY_TRANSMITTED_THROUGH_SPEAKER;
4359    }
4360    if ((attr->flags & AUDIO_FLAG_AUDIBILITY_ENFORCED) == AUDIO_FLAG_AUDIBILITY_ENFORCED) {
4361        return (uint32_t) STRATEGY_ENFORCED_AUDIBLE;
4362    }
4363
4364    // usage to strategy mapping
4365    switch (attr->usage) {
4366    case AUDIO_USAGE_ASSISTANCE_ACCESSIBILITY:
4367        if (isStreamActive(AUDIO_STREAM_RING) || isStreamActive(AUDIO_STREAM_ALARM)) {
4368            return (uint32_t) STRATEGY_SONIFICATION;
4369        }
4370        if (isInCall()) {
4371            return (uint32_t) STRATEGY_PHONE;
4372        }
4373        return (uint32_t) STRATEGY_ACCESSIBILITY;
4374
4375    case AUDIO_USAGE_MEDIA:
4376    case AUDIO_USAGE_GAME:
4377    case AUDIO_USAGE_ASSISTANCE_NAVIGATION_GUIDANCE:
4378    case AUDIO_USAGE_ASSISTANCE_SONIFICATION:
4379        return (uint32_t) STRATEGY_MEDIA;
4380
4381    case AUDIO_USAGE_VOICE_COMMUNICATION:
4382        return (uint32_t) STRATEGY_PHONE;
4383
4384    case AUDIO_USAGE_VOICE_COMMUNICATION_SIGNALLING:
4385        return (uint32_t) STRATEGY_DTMF;
4386
4387    case AUDIO_USAGE_ALARM:
4388    case AUDIO_USAGE_NOTIFICATION_TELEPHONY_RINGTONE:
4389        return (uint32_t) STRATEGY_SONIFICATION;
4390
4391    case AUDIO_USAGE_NOTIFICATION:
4392    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_REQUEST:
4393    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_INSTANT:
4394    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_DELAYED:
4395    case AUDIO_USAGE_NOTIFICATION_EVENT:
4396        return (uint32_t) STRATEGY_SONIFICATION_RESPECTFUL;
4397
4398    case AUDIO_USAGE_UNKNOWN:
4399    default:
4400        return (uint32_t) STRATEGY_MEDIA;
4401    }
4402}
4403
4404void AudioPolicyManager::handleNotificationRoutingForStream(audio_stream_type_t stream) {
4405    switch(stream) {
4406    case AUDIO_STREAM_MUSIC:
4407        checkOutputForStrategy(STRATEGY_SONIFICATION_RESPECTFUL);
4408        updateDevicesAndOutputs();
4409        break;
4410    default:
4411        break;
4412    }
4413}
4414
4415bool AudioPolicyManager::isAnyOutputActive(audio_stream_type_t streamToIgnore) {
4416    for (size_t s = 0 ; s < AUDIO_STREAM_CNT ; s++) {
4417        if (s == (size_t) streamToIgnore) {
4418            continue;
4419        }
4420        for (size_t i = 0; i < mOutputs.size(); i++) {
4421            const sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(i);
4422            if (outputDesc->mRefCount[s] != 0) {
4423                return true;
4424            }
4425        }
4426    }
4427    return false;
4428}
4429
4430uint32_t AudioPolicyManager::handleEventForBeacon(int event) {
4431    switch(event) {
4432    case STARTING_OUTPUT:
4433        mBeaconMuteRefCount++;
4434        break;
4435    case STOPPING_OUTPUT:
4436        if (mBeaconMuteRefCount > 0) {
4437            mBeaconMuteRefCount--;
4438        }
4439        break;
4440    case STARTING_BEACON:
4441        mBeaconPlayingRefCount++;
4442        break;
4443    case STOPPING_BEACON:
4444        if (mBeaconPlayingRefCount > 0) {
4445            mBeaconPlayingRefCount--;
4446        }
4447        break;
4448    }
4449
4450    if (mBeaconMuteRefCount > 0) {
4451        // any playback causes beacon to be muted
4452        return setBeaconMute(true);
4453    } else {
4454        // no other playback: unmute when beacon starts playing, mute when it stops
4455        return setBeaconMute(mBeaconPlayingRefCount == 0);
4456    }
4457}
4458
4459uint32_t AudioPolicyManager::setBeaconMute(bool mute) {
4460    ALOGV("setBeaconMute(%d) mBeaconMuteRefCount=%d mBeaconPlayingRefCount=%d",
4461            mute, mBeaconMuteRefCount, mBeaconPlayingRefCount);
4462    // keep track of muted state to avoid repeating mute/unmute operations
4463    if (mBeaconMuted != mute) {
4464        // mute/unmute AUDIO_STREAM_TTS on all outputs
4465        ALOGV("\t muting %d", mute);
4466        uint32_t maxLatency = 0;
4467        for (size_t i = 0; i < mOutputs.size(); i++) {
4468            sp<AudioOutputDescriptor> desc = mOutputs.valueAt(i);
4469            setStreamMute(AUDIO_STREAM_TTS, mute/*on*/,
4470                    desc->mIoHandle,
4471                    0 /*delay*/, AUDIO_DEVICE_NONE);
4472            const uint32_t latency = desc->latency() * 2;
4473            if (latency > maxLatency) {
4474                maxLatency = latency;
4475            }
4476        }
4477        mBeaconMuted = mute;
4478        return maxLatency;
4479    }
4480    return 0;
4481}
4482
4483audio_devices_t AudioPolicyManager::getDeviceForStrategy(routing_strategy strategy,
4484                                                             bool fromCache)
4485{
4486    uint32_t device = AUDIO_DEVICE_NONE;
4487
4488    if (fromCache) {
4489        ALOGVV("getDeviceForStrategy() from cache strategy %d, device %x",
4490              strategy, mDeviceForStrategy[strategy]);
4491        return mDeviceForStrategy[strategy];
4492    }
4493    audio_devices_t availableOutputDeviceTypes = mAvailableOutputDevices.types();
4494    switch (strategy) {
4495
4496    case STRATEGY_TRANSMITTED_THROUGH_SPEAKER:
4497        device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER;
4498        if (!device) {
4499            ALOGE("getDeviceForStrategy() no device found for "\
4500                    "STRATEGY_TRANSMITTED_THROUGH_SPEAKER");
4501        }
4502        break;
4503
4504    case STRATEGY_SONIFICATION_RESPECTFUL:
4505        if (isInCall()) {
4506            device = getDeviceForStrategy(STRATEGY_SONIFICATION, false /*fromCache*/);
4507        } else if (isStreamActiveRemotely(AUDIO_STREAM_MUSIC,
4508                SONIFICATION_RESPECTFUL_AFTER_MUSIC_DELAY)) {
4509            // while media is playing on a remote device, use the the sonification behavior.
4510            // Note that we test this usecase before testing if media is playing because
4511            //   the isStreamActive() method only informs about the activity of a stream, not
4512            //   if it's for local playback. Note also that we use the same delay between both tests
4513            device = getDeviceForStrategy(STRATEGY_SONIFICATION, false /*fromCache*/);
4514            //user "safe" speaker if available instead of normal speaker to avoid triggering
4515            //other acoustic safety mechanisms for notification
4516            if (device == AUDIO_DEVICE_OUT_SPEAKER && (availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER_SAFE))
4517                device = AUDIO_DEVICE_OUT_SPEAKER_SAFE;
4518        } else if (isStreamActive(AUDIO_STREAM_MUSIC, SONIFICATION_RESPECTFUL_AFTER_MUSIC_DELAY)) {
4519            // while media is playing (or has recently played), use the same device
4520            device = getDeviceForStrategy(STRATEGY_MEDIA, false /*fromCache*/);
4521        } else {
4522            // when media is not playing anymore, fall back on the sonification behavior
4523            device = getDeviceForStrategy(STRATEGY_SONIFICATION, false /*fromCache*/);
4524            //user "safe" speaker if available instead of normal speaker to avoid triggering
4525            //other acoustic safety mechanisms for notification
4526            if (device == AUDIO_DEVICE_OUT_SPEAKER && (availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER_SAFE))
4527                device = AUDIO_DEVICE_OUT_SPEAKER_SAFE;
4528        }
4529
4530        break;
4531
4532    case STRATEGY_DTMF:
4533        if (!isInCall()) {
4534            // when off call, DTMF strategy follows the same rules as MEDIA strategy
4535            device = getDeviceForStrategy(STRATEGY_MEDIA, false /*fromCache*/);
4536            break;
4537        }
4538        // when in call, DTMF and PHONE strategies follow the same rules
4539        // FALL THROUGH
4540
4541    case STRATEGY_PHONE:
4542        // Force use of only devices on primary output if:
4543        // - in call AND
4544        //   - cannot route from voice call RX OR
4545        //   - audio HAL version is < 3.0 and TX device is on the primary HW module
4546        if (mPhoneState == AUDIO_MODE_IN_CALL) {
4547            audio_devices_t txDevice =
4548                    getDeviceAndMixForInputSource(AUDIO_SOURCE_VOICE_COMMUNICATION);
4549            sp<AudioOutputDescriptor> hwOutputDesc = mOutputs.valueFor(mPrimaryOutput);
4550            if (((mAvailableInputDevices.types() &
4551                    AUDIO_DEVICE_IN_TELEPHONY_RX & ~AUDIO_DEVICE_BIT_IN) == 0) ||
4552                    (((txDevice & availablePrimaryInputDevices() & ~AUDIO_DEVICE_BIT_IN) != 0) &&
4553                         (hwOutputDesc->getAudioPort()->mModule->mHalVersion <
4554                             AUDIO_DEVICE_API_VERSION_3_0))) {
4555                availableOutputDeviceTypes = availablePrimaryOutputDevices();
4556            }
4557        }
4558        // for phone strategy, we first consider the forced use and then the available devices by order
4559        // of priority
4560        switch (mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION]) {
4561        case AUDIO_POLICY_FORCE_BT_SCO:
4562            if (!isInCall() || strategy != STRATEGY_DTMF) {
4563                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_SCO_CARKIT;
4564                if (device) break;
4565            }
4566            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_SCO_HEADSET;
4567            if (device) break;
4568            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_SCO;
4569            if (device) break;
4570            // if SCO device is requested but no SCO device is available, fall back to default case
4571            // FALL THROUGH
4572
4573        default:    // FORCE_NONE
4574            // when not in a phone call, phone strategy should route STREAM_VOICE_CALL to A2DP
4575            if (!isInCall() &&
4576                    (mForceUse[AUDIO_POLICY_FORCE_FOR_MEDIA] != AUDIO_POLICY_FORCE_NO_BT_A2DP) &&
4577                    (getA2dpOutput() != 0)) {
4578                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP;
4579                if (device) break;
4580                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES;
4581                if (device) break;
4582            }
4583            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_WIRED_HEADPHONE;
4584            if (device) break;
4585            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_WIRED_HEADSET;
4586            if (device) break;
4587            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_DEVICE;
4588            if (device) break;
4589            if (mPhoneState != AUDIO_MODE_IN_CALL) {
4590                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_ACCESSORY;
4591                if (device) break;
4592                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET;
4593                if (device) break;
4594                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_AUX_DIGITAL;
4595                if (device) break;
4596                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET;
4597                if (device) break;
4598            }
4599            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_EARPIECE;
4600            if (device) break;
4601            device = mDefaultOutputDevice->mDeviceType;
4602            if (device == AUDIO_DEVICE_NONE) {
4603                ALOGE("getDeviceForStrategy() no device found for STRATEGY_PHONE");
4604            }
4605            break;
4606
4607        case AUDIO_POLICY_FORCE_SPEAKER:
4608            // when not in a phone call, phone strategy should route STREAM_VOICE_CALL to
4609            // A2DP speaker when forcing to speaker output
4610            if (!isInCall() &&
4611                    (mForceUse[AUDIO_POLICY_FORCE_FOR_MEDIA] != AUDIO_POLICY_FORCE_NO_BT_A2DP) &&
4612                    (getA2dpOutput() != 0)) {
4613                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER;
4614                if (device) break;
4615            }
4616            if (!isInCall()) {
4617                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_ACCESSORY;
4618                if (device) break;
4619                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_DEVICE;
4620                if (device) break;
4621                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET;
4622                if (device) break;
4623                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_AUX_DIGITAL;
4624                if (device) break;
4625                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET;
4626                if (device) break;
4627            }
4628            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_LINE;
4629            if (device) break;
4630            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER;
4631            if (device) break;
4632            device = mDefaultOutputDevice->mDeviceType;
4633            if (device == AUDIO_DEVICE_NONE) {
4634                ALOGE("getDeviceForStrategy() no device found for STRATEGY_PHONE, FORCE_SPEAKER");
4635            }
4636            break;
4637        }
4638    break;
4639
4640    case STRATEGY_SONIFICATION:
4641
4642        // If incall, just select the STRATEGY_PHONE device: The rest of the behavior is handled by
4643        // handleIncallSonification().
4644        if (isInCall()) {
4645            device = getDeviceForStrategy(STRATEGY_PHONE, false /*fromCache*/);
4646            break;
4647        }
4648        // FALL THROUGH
4649
4650    case STRATEGY_ENFORCED_AUDIBLE:
4651        // strategy STRATEGY_ENFORCED_AUDIBLE uses same routing policy as STRATEGY_SONIFICATION
4652        // except:
4653        //   - when in call where it doesn't default to STRATEGY_PHONE behavior
4654        //   - in countries where not enforced in which case it follows STRATEGY_MEDIA
4655
4656        if ((strategy == STRATEGY_SONIFICATION) ||
4657                (mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] == AUDIO_POLICY_FORCE_SYSTEM_ENFORCED)) {
4658            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER;
4659            if (device == AUDIO_DEVICE_NONE) {
4660                ALOGE("getDeviceForStrategy() speaker device not found for STRATEGY_SONIFICATION");
4661            }
4662        }
4663        // The second device used for sonification is the same as the device used by media strategy
4664        // FALL THROUGH
4665
4666    // FIXME: STRATEGY_ACCESSIBILITY and STRATEGY_REROUTING follow STRATEGY_MEDIA for now
4667    case STRATEGY_ACCESSIBILITY:
4668        if (strategy == STRATEGY_ACCESSIBILITY) {
4669            // do not route accessibility prompts to a digital output currently configured with a
4670            // compressed format as they would likely not be mixed and dropped.
4671            for (size_t i = 0; i < mOutputs.size(); i++) {
4672                sp<AudioOutputDescriptor> desc = mOutputs.valueAt(i);
4673                audio_devices_t devices = desc->device() &
4674                    (AUDIO_DEVICE_OUT_HDMI | AUDIO_DEVICE_OUT_SPDIF | AUDIO_DEVICE_OUT_HDMI_ARC);
4675                if (desc->isActive() && !audio_is_linear_pcm(desc->mFormat) &&
4676                        devices != AUDIO_DEVICE_NONE) {
4677                    availableOutputDeviceTypes = availableOutputDeviceTypes & ~devices;
4678                }
4679            }
4680        }
4681        // FALL THROUGH
4682
4683    case STRATEGY_REROUTING:
4684    case STRATEGY_MEDIA: {
4685        uint32_t device2 = AUDIO_DEVICE_NONE;
4686        if (strategy != STRATEGY_SONIFICATION) {
4687            // no sonification on remote submix (e.g. WFD)
4688            if (mAvailableOutputDevices.getDevice(AUDIO_DEVICE_OUT_REMOTE_SUBMIX, String8("0")) != 0) {
4689                device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_REMOTE_SUBMIX;
4690            }
4691        }
4692        if ((device2 == AUDIO_DEVICE_NONE) &&
4693                (mForceUse[AUDIO_POLICY_FORCE_FOR_MEDIA] != AUDIO_POLICY_FORCE_NO_BT_A2DP) &&
4694                (getA2dpOutput() != 0)) {
4695            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP;
4696            if (device2 == AUDIO_DEVICE_NONE) {
4697                device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES;
4698            }
4699            if (device2 == AUDIO_DEVICE_NONE) {
4700                device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER;
4701            }
4702        }
4703        if ((device2 == AUDIO_DEVICE_NONE) &&
4704            (mForceUse[AUDIO_POLICY_FORCE_FOR_MEDIA] == AUDIO_POLICY_FORCE_SPEAKER)) {
4705            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER;
4706        }
4707        if (device2 == AUDIO_DEVICE_NONE) {
4708            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_WIRED_HEADPHONE;
4709        }
4710        if ((device2 == AUDIO_DEVICE_NONE)) {
4711            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_LINE;
4712        }
4713        if (device2 == AUDIO_DEVICE_NONE) {
4714            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_WIRED_HEADSET;
4715        }
4716        if (device2 == AUDIO_DEVICE_NONE) {
4717            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_ACCESSORY;
4718        }
4719        if (device2 == AUDIO_DEVICE_NONE) {
4720            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_DEVICE;
4721        }
4722        if (device2 == AUDIO_DEVICE_NONE) {
4723            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET;
4724        }
4725        if ((device2 == AUDIO_DEVICE_NONE) && (strategy != STRATEGY_SONIFICATION)) {
4726            // no sonification on aux digital (e.g. HDMI)
4727            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_AUX_DIGITAL;
4728        }
4729        if ((device2 == AUDIO_DEVICE_NONE) &&
4730                (mForceUse[AUDIO_POLICY_FORCE_FOR_DOCK] == AUDIO_POLICY_FORCE_ANALOG_DOCK)) {
4731            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET;
4732        }
4733        if (device2 == AUDIO_DEVICE_NONE) {
4734            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER;
4735        }
4736        int device3 = AUDIO_DEVICE_NONE;
4737        if (strategy == STRATEGY_MEDIA) {
4738            // ARC, SPDIF and AUX_LINE can co-exist with others.
4739            device3 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_HDMI_ARC;
4740            device3 |= (availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPDIF);
4741            device3 |= (availableOutputDeviceTypes & AUDIO_DEVICE_OUT_AUX_LINE);
4742        }
4743
4744        device2 |= device3;
4745        // device is DEVICE_OUT_SPEAKER if we come from case STRATEGY_SONIFICATION or
4746        // STRATEGY_ENFORCED_AUDIBLE, AUDIO_DEVICE_NONE otherwise
4747        device |= device2;
4748
4749        // If hdmi system audio mode is on, remove speaker out of output list.
4750        if ((strategy == STRATEGY_MEDIA) &&
4751            (mForceUse[AUDIO_POLICY_FORCE_FOR_HDMI_SYSTEM_AUDIO] ==
4752                AUDIO_POLICY_FORCE_HDMI_SYSTEM_AUDIO_ENFORCED)) {
4753            device &= ~AUDIO_DEVICE_OUT_SPEAKER;
4754        }
4755
4756        if (device) break;
4757        device = mDefaultOutputDevice->mDeviceType;
4758        if (device == AUDIO_DEVICE_NONE) {
4759            ALOGE("getDeviceForStrategy() no device found for STRATEGY_MEDIA");
4760        }
4761        } break;
4762
4763    default:
4764        ALOGW("getDeviceForStrategy() unknown strategy: %d", strategy);
4765        break;
4766    }
4767
4768    ALOGVV("getDeviceForStrategy() strategy %d, device %x", strategy, device);
4769    return device;
4770}
4771
4772void AudioPolicyManager::updateDevicesAndOutputs()
4773{
4774    for (int i = 0; i < NUM_STRATEGIES; i++) {
4775        mDeviceForStrategy[i] = getDeviceForStrategy((routing_strategy)i, false /*fromCache*/);
4776    }
4777    mPreviousOutputs = mOutputs;
4778}
4779
4780uint32_t AudioPolicyManager::checkDeviceMuteStrategies(sp<AudioOutputDescriptor> outputDesc,
4781                                                       audio_devices_t prevDevice,
4782                                                       uint32_t delayMs)
4783{
4784    // mute/unmute strategies using an incompatible device combination
4785    // if muting, wait for the audio in pcm buffer to be drained before proceeding
4786    // if unmuting, unmute only after the specified delay
4787    if (outputDesc->isDuplicated()) {
4788        return 0;
4789    }
4790
4791    uint32_t muteWaitMs = 0;
4792    audio_devices_t device = outputDesc->device();
4793    bool shouldMute = outputDesc->isActive() && (popcount(device) >= 2);
4794
4795    for (size_t i = 0; i < NUM_STRATEGIES; i++) {
4796        audio_devices_t curDevice = getDeviceForStrategy((routing_strategy)i, false /*fromCache*/);
4797        curDevice = curDevice & outputDesc->mProfile->mSupportedDevices.types();
4798        bool mute = shouldMute && (curDevice & device) && (curDevice != device);
4799        bool doMute = false;
4800
4801        if (mute && !outputDesc->mStrategyMutedByDevice[i]) {
4802            doMute = true;
4803            outputDesc->mStrategyMutedByDevice[i] = true;
4804        } else if (!mute && outputDesc->mStrategyMutedByDevice[i]){
4805            doMute = true;
4806            outputDesc->mStrategyMutedByDevice[i] = false;
4807        }
4808        if (doMute) {
4809            for (size_t j = 0; j < mOutputs.size(); j++) {
4810                sp<AudioOutputDescriptor> desc = mOutputs.valueAt(j);
4811                // skip output if it does not share any device with current output
4812                if ((desc->supportedDevices() & outputDesc->supportedDevices())
4813                        == AUDIO_DEVICE_NONE) {
4814                    continue;
4815                }
4816                audio_io_handle_t curOutput = mOutputs.keyAt(j);
4817                ALOGVV("checkDeviceMuteStrategies() %s strategy %d (curDevice %04x) on output %d",
4818                      mute ? "muting" : "unmuting", i, curDevice, curOutput);
4819                setStrategyMute((routing_strategy)i, mute, curOutput, mute ? 0 : delayMs);
4820                if (desc->isStrategyActive((routing_strategy)i)) {
4821                    if (mute) {
4822                        // FIXME: should not need to double latency if volume could be applied
4823                        // immediately by the audioflinger mixer. We must account for the delay
4824                        // between now and the next time the audioflinger thread for this output
4825                        // will process a buffer (which corresponds to one buffer size,
4826                        // usually 1/2 or 1/4 of the latency).
4827                        if (muteWaitMs < desc->latency() * 2) {
4828                            muteWaitMs = desc->latency() * 2;
4829                        }
4830                    }
4831                }
4832            }
4833        }
4834    }
4835
4836    // temporary mute output if device selection changes to avoid volume bursts due to
4837    // different per device volumes
4838    if (outputDesc->isActive() && (device != prevDevice)) {
4839        if (muteWaitMs < outputDesc->latency() * 2) {
4840            muteWaitMs = outputDesc->latency() * 2;
4841        }
4842        for (size_t i = 0; i < NUM_STRATEGIES; i++) {
4843            if (outputDesc->isStrategyActive((routing_strategy)i)) {
4844                setStrategyMute((routing_strategy)i, true, outputDesc->mIoHandle);
4845                // do tempMute unmute after twice the mute wait time
4846                setStrategyMute((routing_strategy)i, false, outputDesc->mIoHandle,
4847                                muteWaitMs *2, device);
4848            }
4849        }
4850    }
4851
4852    // wait for the PCM output buffers to empty before proceeding with the rest of the command
4853    if (muteWaitMs > delayMs) {
4854        muteWaitMs -= delayMs;
4855        usleep(muteWaitMs * 1000);
4856        return muteWaitMs;
4857    }
4858    return 0;
4859}
4860
4861uint32_t AudioPolicyManager::setOutputDevice(audio_io_handle_t output,
4862                                             audio_devices_t device,
4863                                             bool force,
4864                                             int delayMs,
4865                                             audio_patch_handle_t *patchHandle,
4866                                             const char* address)
4867{
4868    ALOGV("setOutputDevice() output %d device %04x delayMs %d", output, device, delayMs);
4869    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
4870    AudioParameter param;
4871    uint32_t muteWaitMs;
4872
4873    if (outputDesc->isDuplicated()) {
4874        muteWaitMs = setOutputDevice(outputDesc->mOutput1->mIoHandle, device, force, delayMs);
4875        muteWaitMs += setOutputDevice(outputDesc->mOutput2->mIoHandle, device, force, delayMs);
4876        return muteWaitMs;
4877    }
4878    // no need to proceed if new device is not AUDIO_DEVICE_NONE and not supported by current
4879    // output profile
4880    if ((device != AUDIO_DEVICE_NONE) &&
4881            ((device & outputDesc->mProfile->mSupportedDevices.types()) == 0)) {
4882        return 0;
4883    }
4884
4885    // filter devices according to output selected
4886    device = (audio_devices_t)(device & outputDesc->mProfile->mSupportedDevices.types());
4887
4888    audio_devices_t prevDevice = outputDesc->mDevice;
4889
4890    ALOGV("setOutputDevice() prevDevice %04x", prevDevice);
4891
4892    if (device != AUDIO_DEVICE_NONE) {
4893        outputDesc->mDevice = device;
4894    }
4895    muteWaitMs = checkDeviceMuteStrategies(outputDesc, prevDevice, delayMs);
4896
4897    // Do not change the routing if:
4898    //      the requested device is AUDIO_DEVICE_NONE
4899    //      OR the requested device is the same as current device
4900    //  AND force is not specified
4901    //  AND the output is connected by a valid audio patch.
4902    // Doing this check here allows the caller to call setOutputDevice() without conditions
4903    if ((device == AUDIO_DEVICE_NONE || device == prevDevice) && !force &&
4904            outputDesc->mPatchHandle != 0) {
4905        ALOGV("setOutputDevice() setting same device %04x or null device for output %d",
4906              device, output);
4907        return muteWaitMs;
4908    }
4909
4910    ALOGV("setOutputDevice() changing device");
4911
4912    // do the routing
4913    if (device == AUDIO_DEVICE_NONE) {
4914        resetOutputDevice(output, delayMs, NULL);
4915    } else {
4916        DeviceVector deviceList = (address == NULL) ?
4917                mAvailableOutputDevices.getDevicesFromType(device)
4918                : mAvailableOutputDevices.getDevicesFromTypeAddr(device, String8(address));
4919        if (!deviceList.isEmpty()) {
4920            struct audio_patch patch;
4921            outputDesc->toAudioPortConfig(&patch.sources[0]);
4922            patch.num_sources = 1;
4923            patch.num_sinks = 0;
4924            for (size_t i = 0; i < deviceList.size() && i < AUDIO_PATCH_PORTS_MAX; i++) {
4925                deviceList.itemAt(i)->toAudioPortConfig(&patch.sinks[i]);
4926                patch.num_sinks++;
4927            }
4928            ssize_t index;
4929            if (patchHandle && *patchHandle != AUDIO_PATCH_HANDLE_NONE) {
4930                index = mAudioPatches.indexOfKey(*patchHandle);
4931            } else {
4932                index = mAudioPatches.indexOfKey(outputDesc->mPatchHandle);
4933            }
4934            sp< AudioPatch> patchDesc;
4935            audio_patch_handle_t afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
4936            if (index >= 0) {
4937                patchDesc = mAudioPatches.valueAt(index);
4938                afPatchHandle = patchDesc->mAfPatchHandle;
4939            }
4940
4941            status_t status = mpClientInterface->createAudioPatch(&patch,
4942                                                                   &afPatchHandle,
4943                                                                   delayMs);
4944            ALOGV("setOutputDevice() createAudioPatch returned %d patchHandle %d"
4945                    "num_sources %d num_sinks %d",
4946                                       status, afPatchHandle, patch.num_sources, patch.num_sinks);
4947            if (status == NO_ERROR) {
4948                if (index < 0) {
4949                    patchDesc = new AudioPatch((audio_patch_handle_t)nextUniqueId(),
4950                                               &patch, mUidCached);
4951                    addAudioPatch(patchDesc->mHandle, patchDesc);
4952                } else {
4953                    patchDesc->mPatch = patch;
4954                }
4955                patchDesc->mAfPatchHandle = afPatchHandle;
4956                patchDesc->mUid = mUidCached;
4957                if (patchHandle) {
4958                    *patchHandle = patchDesc->mHandle;
4959                }
4960                outputDesc->mPatchHandle = patchDesc->mHandle;
4961                nextAudioPortGeneration();
4962                mpClientInterface->onAudioPatchListUpdate();
4963            }
4964        }
4965
4966        // inform all input as well
4967        for (size_t i = 0; i < mInputs.size(); i++) {
4968            const sp<AudioInputDescriptor>  inputDescriptor = mInputs.valueAt(i);
4969            if (!isVirtualInputDevice(inputDescriptor->mDevice)) {
4970                AudioParameter inputCmd = AudioParameter();
4971                ALOGV("%s: inform input %d of device:%d", __func__,
4972                      inputDescriptor->mIoHandle, device);
4973                inputCmd.addInt(String8(AudioParameter::keyRouting),device);
4974                mpClientInterface->setParameters(inputDescriptor->mIoHandle,
4975                                                 inputCmd.toString(),
4976                                                 delayMs);
4977            }
4978        }
4979    }
4980
4981    // update stream volumes according to new device
4982    applyStreamVolumes(output, device, delayMs);
4983
4984    return muteWaitMs;
4985}
4986
4987status_t AudioPolicyManager::resetOutputDevice(audio_io_handle_t output,
4988                                               int delayMs,
4989                                               audio_patch_handle_t *patchHandle)
4990{
4991    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
4992    ssize_t index;
4993    if (patchHandle) {
4994        index = mAudioPatches.indexOfKey(*patchHandle);
4995    } else {
4996        index = mAudioPatches.indexOfKey(outputDesc->mPatchHandle);
4997    }
4998    if (index < 0) {
4999        return INVALID_OPERATION;
5000    }
5001    sp< AudioPatch> patchDesc = mAudioPatches.valueAt(index);
5002    status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, delayMs);
5003    ALOGV("resetOutputDevice() releaseAudioPatch returned %d", status);
5004    outputDesc->mPatchHandle = 0;
5005    removeAudioPatch(patchDesc->mHandle);
5006    nextAudioPortGeneration();
5007    mpClientInterface->onAudioPatchListUpdate();
5008    return status;
5009}
5010
5011status_t AudioPolicyManager::setInputDevice(audio_io_handle_t input,
5012                                            audio_devices_t device,
5013                                            bool force,
5014                                            audio_patch_handle_t *patchHandle)
5015{
5016    status_t status = NO_ERROR;
5017
5018    sp<AudioInputDescriptor> inputDesc = mInputs.valueFor(input);
5019    if ((device != AUDIO_DEVICE_NONE) && ((device != inputDesc->mDevice) || force)) {
5020        inputDesc->mDevice = device;
5021
5022        DeviceVector deviceList = mAvailableInputDevices.getDevicesFromType(device);
5023        if (!deviceList.isEmpty()) {
5024            struct audio_patch patch;
5025            inputDesc->toAudioPortConfig(&patch.sinks[0]);
5026            // AUDIO_SOURCE_HOTWORD is for internal use only:
5027            // handled as AUDIO_SOURCE_VOICE_RECOGNITION by the audio HAL
5028            if (patch.sinks[0].ext.mix.usecase.source == AUDIO_SOURCE_HOTWORD &&
5029                    !inputDesc->mIsSoundTrigger) {
5030                patch.sinks[0].ext.mix.usecase.source = AUDIO_SOURCE_VOICE_RECOGNITION;
5031            }
5032            patch.num_sinks = 1;
5033            //only one input device for now
5034            deviceList.itemAt(0)->toAudioPortConfig(&patch.sources[0]);
5035            patch.num_sources = 1;
5036            ssize_t index;
5037            if (patchHandle && *patchHandle != AUDIO_PATCH_HANDLE_NONE) {
5038                index = mAudioPatches.indexOfKey(*patchHandle);
5039            } else {
5040                index = mAudioPatches.indexOfKey(inputDesc->mPatchHandle);
5041            }
5042            sp< AudioPatch> patchDesc;
5043            audio_patch_handle_t afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
5044            if (index >= 0) {
5045                patchDesc = mAudioPatches.valueAt(index);
5046                afPatchHandle = patchDesc->mAfPatchHandle;
5047            }
5048
5049            status_t status = mpClientInterface->createAudioPatch(&patch,
5050                                                                  &afPatchHandle,
5051                                                                  0);
5052            ALOGV("setInputDevice() createAudioPatch returned %d patchHandle %d",
5053                                                                          status, afPatchHandle);
5054            if (status == NO_ERROR) {
5055                if (index < 0) {
5056                    patchDesc = new AudioPatch((audio_patch_handle_t)nextUniqueId(),
5057                                               &patch, mUidCached);
5058                    addAudioPatch(patchDesc->mHandle, patchDesc);
5059                } else {
5060                    patchDesc->mPatch = patch;
5061                }
5062                patchDesc->mAfPatchHandle = afPatchHandle;
5063                patchDesc->mUid = mUidCached;
5064                if (patchHandle) {
5065                    *patchHandle = patchDesc->mHandle;
5066                }
5067                inputDesc->mPatchHandle = patchDesc->mHandle;
5068                nextAudioPortGeneration();
5069                mpClientInterface->onAudioPatchListUpdate();
5070            }
5071        }
5072    }
5073    return status;
5074}
5075
5076status_t AudioPolicyManager::resetInputDevice(audio_io_handle_t input,
5077                                              audio_patch_handle_t *patchHandle)
5078{
5079    sp<AudioInputDescriptor> inputDesc = mInputs.valueFor(input);
5080    ssize_t index;
5081    if (patchHandle) {
5082        index = mAudioPatches.indexOfKey(*patchHandle);
5083    } else {
5084        index = mAudioPatches.indexOfKey(inputDesc->mPatchHandle);
5085    }
5086    if (index < 0) {
5087        return INVALID_OPERATION;
5088    }
5089    sp< AudioPatch> patchDesc = mAudioPatches.valueAt(index);
5090    status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, 0);
5091    ALOGV("resetInputDevice() releaseAudioPatch returned %d", status);
5092    inputDesc->mPatchHandle = 0;
5093    removeAudioPatch(patchDesc->mHandle);
5094    nextAudioPortGeneration();
5095    mpClientInterface->onAudioPatchListUpdate();
5096    return status;
5097}
5098
5099sp<AudioPolicyManager::IOProfile> AudioPolicyManager::getInputProfile(audio_devices_t device,
5100                                                   String8 address,
5101                                                   uint32_t& samplingRate,
5102                                                   audio_format_t format,
5103                                                   audio_channel_mask_t channelMask,
5104                                                   audio_input_flags_t flags)
5105{
5106    // Choose an input profile based on the requested capture parameters: select the first available
5107    // profile supporting all requested parameters.
5108
5109    for (size_t i = 0; i < mHwModules.size(); i++)
5110    {
5111        if (mHwModules[i]->mHandle == 0) {
5112            continue;
5113        }
5114        for (size_t j = 0; j < mHwModules[i]->mInputProfiles.size(); j++)
5115        {
5116            sp<IOProfile> profile = mHwModules[i]->mInputProfiles[j];
5117            // profile->log();
5118            if (profile->isCompatibleProfile(device, address, samplingRate,
5119                                             &samplingRate /*updatedSamplingRate*/,
5120                                             format, channelMask, (audio_output_flags_t) flags)) {
5121
5122                return profile;
5123            }
5124        }
5125    }
5126    return NULL;
5127}
5128
5129
5130audio_devices_t AudioPolicyManager::getDeviceAndMixForInputSource(audio_source_t inputSource,
5131                                                            AudioMix **policyMix)
5132{
5133    audio_devices_t availableDeviceTypes = mAvailableInputDevices.types() &
5134                                            ~AUDIO_DEVICE_BIT_IN;
5135
5136    for (size_t i = 0; i < mPolicyMixes.size(); i++) {
5137        if (mPolicyMixes[i]->mMix.mMixType != MIX_TYPE_RECORDERS) {
5138            continue;
5139        }
5140        for (size_t j = 0; j < mPolicyMixes[i]->mMix.mCriteria.size(); j++) {
5141            if ((RULE_MATCH_ATTRIBUTE_CAPTURE_PRESET == mPolicyMixes[i]->mMix.mCriteria[j].mRule &&
5142                    mPolicyMixes[i]->mMix.mCriteria[j].mAttr.mSource == inputSource) ||
5143               (RULE_EXCLUDE_ATTRIBUTE_CAPTURE_PRESET == mPolicyMixes[i]->mMix.mCriteria[j].mRule &&
5144                    mPolicyMixes[i]->mMix.mCriteria[j].mAttr.mSource != inputSource)) {
5145                if (availableDeviceTypes & AUDIO_DEVICE_IN_REMOTE_SUBMIX) {
5146                    if (policyMix != NULL) {
5147                        *policyMix = &mPolicyMixes[i]->mMix;
5148                    }
5149                    return AUDIO_DEVICE_IN_REMOTE_SUBMIX;
5150                }
5151                break;
5152            }
5153        }
5154    }
5155
5156    return getDeviceForInputSource(inputSource);
5157}
5158
5159audio_devices_t AudioPolicyManager::getDeviceForInputSource(audio_source_t inputSource)
5160{
5161    uint32_t device = AUDIO_DEVICE_NONE;
5162    audio_devices_t availableDeviceTypes = mAvailableInputDevices.types() &
5163                                            ~AUDIO_DEVICE_BIT_IN;
5164
5165    switch (inputSource) {
5166    case AUDIO_SOURCE_VOICE_UPLINK:
5167      if (availableDeviceTypes & AUDIO_DEVICE_IN_VOICE_CALL) {
5168          device = AUDIO_DEVICE_IN_VOICE_CALL;
5169          break;
5170      }
5171      break;
5172
5173    case AUDIO_SOURCE_DEFAULT:
5174    case AUDIO_SOURCE_MIC:
5175    if (availableDeviceTypes & AUDIO_DEVICE_IN_BLUETOOTH_A2DP) {
5176        device = AUDIO_DEVICE_IN_BLUETOOTH_A2DP;
5177    } else if ((mForceUse[AUDIO_POLICY_FORCE_FOR_RECORD] == AUDIO_POLICY_FORCE_BT_SCO) &&
5178        (availableDeviceTypes & AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET)) {
5179        device = AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET;
5180    } else if (availableDeviceTypes & AUDIO_DEVICE_IN_WIRED_HEADSET) {
5181        device = AUDIO_DEVICE_IN_WIRED_HEADSET;
5182    } else if (availableDeviceTypes & AUDIO_DEVICE_IN_USB_DEVICE) {
5183        device = AUDIO_DEVICE_IN_USB_DEVICE;
5184    } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) {
5185        device = AUDIO_DEVICE_IN_BUILTIN_MIC;
5186    }
5187    break;
5188
5189    case AUDIO_SOURCE_VOICE_COMMUNICATION:
5190        // Allow only use of devices on primary input if in call and HAL does not support routing
5191        // to voice call path.
5192        if ((mPhoneState == AUDIO_MODE_IN_CALL) &&
5193                (mAvailableOutputDevices.types() & AUDIO_DEVICE_OUT_TELEPHONY_TX) == 0) {
5194            availableDeviceTypes = availablePrimaryInputDevices() & ~AUDIO_DEVICE_BIT_IN;
5195        }
5196
5197        switch (mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION]) {
5198        case AUDIO_POLICY_FORCE_BT_SCO:
5199            // if SCO device is requested but no SCO device is available, fall back to default case
5200            if (availableDeviceTypes & AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET) {
5201                device = AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET;
5202                break;
5203            }
5204            // FALL THROUGH
5205
5206        default:    // FORCE_NONE
5207            if (availableDeviceTypes & AUDIO_DEVICE_IN_WIRED_HEADSET) {
5208                device = AUDIO_DEVICE_IN_WIRED_HEADSET;
5209            } else if (availableDeviceTypes & AUDIO_DEVICE_IN_USB_DEVICE) {
5210                device = AUDIO_DEVICE_IN_USB_DEVICE;
5211            } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) {
5212                device = AUDIO_DEVICE_IN_BUILTIN_MIC;
5213            }
5214            break;
5215
5216        case AUDIO_POLICY_FORCE_SPEAKER:
5217            if (availableDeviceTypes & AUDIO_DEVICE_IN_BACK_MIC) {
5218                device = AUDIO_DEVICE_IN_BACK_MIC;
5219            } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) {
5220                device = AUDIO_DEVICE_IN_BUILTIN_MIC;
5221            }
5222            break;
5223        }
5224        break;
5225
5226    case AUDIO_SOURCE_VOICE_RECOGNITION:
5227    case AUDIO_SOURCE_HOTWORD:
5228        if (mForceUse[AUDIO_POLICY_FORCE_FOR_RECORD] == AUDIO_POLICY_FORCE_BT_SCO &&
5229                availableDeviceTypes & AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET) {
5230            device = AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET;
5231        } else if (availableDeviceTypes & AUDIO_DEVICE_IN_WIRED_HEADSET) {
5232            device = AUDIO_DEVICE_IN_WIRED_HEADSET;
5233        } else if (availableDeviceTypes & AUDIO_DEVICE_IN_USB_DEVICE) {
5234            device = AUDIO_DEVICE_IN_USB_DEVICE;
5235        } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) {
5236            device = AUDIO_DEVICE_IN_BUILTIN_MIC;
5237        }
5238        break;
5239    case AUDIO_SOURCE_CAMCORDER:
5240        if (availableDeviceTypes & AUDIO_DEVICE_IN_BACK_MIC) {
5241            device = AUDIO_DEVICE_IN_BACK_MIC;
5242        } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) {
5243            device = AUDIO_DEVICE_IN_BUILTIN_MIC;
5244        }
5245        break;
5246    case AUDIO_SOURCE_VOICE_DOWNLINK:
5247    case AUDIO_SOURCE_VOICE_CALL:
5248        if (availableDeviceTypes & AUDIO_DEVICE_IN_VOICE_CALL) {
5249            device = AUDIO_DEVICE_IN_VOICE_CALL;
5250        }
5251        break;
5252    case AUDIO_SOURCE_REMOTE_SUBMIX:
5253        if (availableDeviceTypes & AUDIO_DEVICE_IN_REMOTE_SUBMIX) {
5254            device = AUDIO_DEVICE_IN_REMOTE_SUBMIX;
5255        }
5256        break;
5257     case AUDIO_SOURCE_FM_TUNER:
5258        if (availableDeviceTypes & AUDIO_DEVICE_IN_FM_TUNER) {
5259            device = AUDIO_DEVICE_IN_FM_TUNER;
5260        }
5261        break;
5262    default:
5263        ALOGW("getDeviceForInputSource() invalid input source %d", inputSource);
5264        break;
5265    }
5266    ALOGV("getDeviceForInputSource()input source %d, device %08x", inputSource, device);
5267    return device;
5268}
5269
5270bool AudioPolicyManager::isVirtualInputDevice(audio_devices_t device)
5271{
5272    if ((device & AUDIO_DEVICE_BIT_IN) != 0) {
5273        device &= ~AUDIO_DEVICE_BIT_IN;
5274        if ((popcount(device) == 1) && ((device & ~APM_AUDIO_IN_DEVICE_VIRTUAL_ALL) == 0))
5275            return true;
5276    }
5277    return false;
5278}
5279
5280bool AudioPolicyManager::deviceDistinguishesOnAddress(audio_devices_t device) {
5281    return ((device & APM_AUDIO_DEVICE_MATCH_ADDRESS_ALL & ~AUDIO_DEVICE_BIT_IN) != 0);
5282}
5283
5284audio_io_handle_t AudioPolicyManager::getActiveInput(bool ignoreVirtualInputs)
5285{
5286    for (size_t i = 0; i < mInputs.size(); i++) {
5287        const sp<AudioInputDescriptor>  input_descriptor = mInputs.valueAt(i);
5288        if ((input_descriptor->mRefCount > 0)
5289                && (!ignoreVirtualInputs || !isVirtualInputDevice(input_descriptor->mDevice))) {
5290            return mInputs.keyAt(i);
5291        }
5292    }
5293    return 0;
5294}
5295
5296uint32_t AudioPolicyManager::activeInputsCount() const
5297{
5298    uint32_t count = 0;
5299    for (size_t i = 0; i < mInputs.size(); i++) {
5300        const sp<AudioInputDescriptor>  desc = mInputs.valueAt(i);
5301        if (desc->mRefCount > 0) {
5302            count++;
5303        }
5304    }
5305    return count;
5306}
5307
5308
5309audio_devices_t AudioPolicyManager::getDeviceForVolume(audio_devices_t device)
5310{
5311    if (device == AUDIO_DEVICE_NONE) {
5312        // this happens when forcing a route update and no track is active on an output.
5313        // In this case the returned category is not important.
5314        device =  AUDIO_DEVICE_OUT_SPEAKER;
5315    } else if (popcount(device) > 1) {
5316        // Multiple device selection is either:
5317        //  - speaker + one other device: give priority to speaker in this case.
5318        //  - one A2DP device + another device: happens with duplicated output. In this case
5319        // retain the device on the A2DP output as the other must not correspond to an active
5320        // selection if not the speaker.
5321        //  - HDMI-CEC system audio mode only output: give priority to available item in order.
5322        if (device & AUDIO_DEVICE_OUT_SPEAKER) {
5323            device = AUDIO_DEVICE_OUT_SPEAKER;
5324        } else if (device & AUDIO_DEVICE_OUT_HDMI_ARC) {
5325            device = AUDIO_DEVICE_OUT_HDMI_ARC;
5326        } else if (device & AUDIO_DEVICE_OUT_AUX_LINE) {
5327            device = AUDIO_DEVICE_OUT_AUX_LINE;
5328        } else if (device & AUDIO_DEVICE_OUT_SPDIF) {
5329            device = AUDIO_DEVICE_OUT_SPDIF;
5330        } else {
5331            device = (audio_devices_t)(device & AUDIO_DEVICE_OUT_ALL_A2DP);
5332        }
5333    }
5334
5335    /*SPEAKER_SAFE is an alias of SPEAKER for purposes of volume control*/
5336    if (device == AUDIO_DEVICE_OUT_SPEAKER_SAFE)
5337        device = AUDIO_DEVICE_OUT_SPEAKER;
5338
5339    ALOGW_IF(popcount(device) != 1,
5340            "getDeviceForVolume() invalid device combination: %08x",
5341            device);
5342
5343    return device;
5344}
5345
5346AudioPolicyManager::device_category AudioPolicyManager::getDeviceCategory(audio_devices_t device)
5347{
5348    switch(getDeviceForVolume(device)) {
5349        case AUDIO_DEVICE_OUT_EARPIECE:
5350            return DEVICE_CATEGORY_EARPIECE;
5351        case AUDIO_DEVICE_OUT_WIRED_HEADSET:
5352        case AUDIO_DEVICE_OUT_WIRED_HEADPHONE:
5353        case AUDIO_DEVICE_OUT_BLUETOOTH_SCO:
5354        case AUDIO_DEVICE_OUT_BLUETOOTH_SCO_HEADSET:
5355        case AUDIO_DEVICE_OUT_BLUETOOTH_A2DP:
5356        case AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES:
5357            return DEVICE_CATEGORY_HEADSET;
5358        case AUDIO_DEVICE_OUT_LINE:
5359        case AUDIO_DEVICE_OUT_AUX_DIGITAL:
5360        /*USB?  Remote submix?*/
5361            return DEVICE_CATEGORY_EXT_MEDIA;
5362        case AUDIO_DEVICE_OUT_SPEAKER:
5363        case AUDIO_DEVICE_OUT_BLUETOOTH_SCO_CARKIT:
5364        case AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER:
5365        case AUDIO_DEVICE_OUT_USB_ACCESSORY:
5366        case AUDIO_DEVICE_OUT_USB_DEVICE:
5367        case AUDIO_DEVICE_OUT_REMOTE_SUBMIX:
5368        default:
5369            return DEVICE_CATEGORY_SPEAKER;
5370    }
5371}
5372
5373/* static */
5374float AudioPolicyManager::volIndexToAmpl(audio_devices_t device, const StreamDescriptor& streamDesc,
5375        int indexInUi)
5376{
5377    device_category deviceCategory = getDeviceCategory(device);
5378    const VolumeCurvePoint *curve = streamDesc.mVolumeCurve[deviceCategory];
5379
5380    // the volume index in the UI is relative to the min and max volume indices for this stream type
5381    int nbSteps = 1 + curve[VOLMAX].mIndex -
5382            curve[VOLMIN].mIndex;
5383    int volIdx = (nbSteps * (indexInUi - streamDesc.mIndexMin)) /
5384            (streamDesc.mIndexMax - streamDesc.mIndexMin);
5385
5386    // find what part of the curve this index volume belongs to, or if it's out of bounds
5387    int segment = 0;
5388    if (volIdx < curve[VOLMIN].mIndex) {         // out of bounds
5389        return 0.0f;
5390    } else if (volIdx < curve[VOLKNEE1].mIndex) {
5391        segment = 0;
5392    } else if (volIdx < curve[VOLKNEE2].mIndex) {
5393        segment = 1;
5394    } else if (volIdx <= curve[VOLMAX].mIndex) {
5395        segment = 2;
5396    } else {                                                               // out of bounds
5397        return 1.0f;
5398    }
5399
5400    // linear interpolation in the attenuation table in dB
5401    float decibels = curve[segment].mDBAttenuation +
5402            ((float)(volIdx - curve[segment].mIndex)) *
5403                ( (curve[segment+1].mDBAttenuation -
5404                        curve[segment].mDBAttenuation) /
5405                    ((float)(curve[segment+1].mIndex -
5406                            curve[segment].mIndex)) );
5407
5408    float amplification = exp( decibels * 0.115129f); // exp( dB * ln(10) / 20 )
5409
5410    ALOGVV("VOLUME vol index=[%d %d %d], dB=[%.1f %.1f %.1f] ampl=%.5f",
5411            curve[segment].mIndex, volIdx,
5412            curve[segment+1].mIndex,
5413            curve[segment].mDBAttenuation,
5414            decibels,
5415            curve[segment+1].mDBAttenuation,
5416            amplification);
5417
5418    return amplification;
5419}
5420
5421const AudioPolicyManager::VolumeCurvePoint
5422    AudioPolicyManager::sDefaultVolumeCurve[AudioPolicyManager::VOLCNT] = {
5423    {1, -49.5f}, {33, -33.5f}, {66, -17.0f}, {100, 0.0f}
5424};
5425
5426const AudioPolicyManager::VolumeCurvePoint
5427    AudioPolicyManager::sDefaultMediaVolumeCurve[AudioPolicyManager::VOLCNT] = {
5428    {1, -58.0f}, {20, -40.0f}, {60, -17.0f}, {100, 0.0f}
5429};
5430
5431const AudioPolicyManager::VolumeCurvePoint
5432    AudioPolicyManager::sExtMediaSystemVolumeCurve[AudioPolicyManager::VOLCNT] = {
5433    {1, -58.0f}, {20, -40.0f}, {60, -21.0f}, {100, -10.0f}
5434};
5435
5436const AudioPolicyManager::VolumeCurvePoint
5437    AudioPolicyManager::sSpeakerMediaVolumeCurve[AudioPolicyManager::VOLCNT] = {
5438    {1, -56.0f}, {20, -34.0f}, {60, -11.0f}, {100, 0.0f}
5439};
5440
5441const AudioPolicyManager::VolumeCurvePoint
5442    AudioPolicyManager::sSpeakerMediaVolumeCurveDrc[AudioPolicyManager::VOLCNT] = {
5443    {1, -55.0f}, {20, -43.0f}, {86, -12.0f}, {100, 0.0f}
5444};
5445
5446const AudioPolicyManager::VolumeCurvePoint
5447    AudioPolicyManager::sSpeakerSonificationVolumeCurve[AudioPolicyManager::VOLCNT] = {
5448    {1, -29.7f}, {33, -20.1f}, {66, -10.2f}, {100, 0.0f}
5449};
5450
5451const AudioPolicyManager::VolumeCurvePoint
5452    AudioPolicyManager::sSpeakerSonificationVolumeCurveDrc[AudioPolicyManager::VOLCNT] = {
5453    {1, -35.7f}, {33, -26.1f}, {66, -13.2f}, {100, 0.0f}
5454};
5455
5456// AUDIO_STREAM_SYSTEM, AUDIO_STREAM_ENFORCED_AUDIBLE and AUDIO_STREAM_DTMF volume tracks
5457// AUDIO_STREAM_RING on phones and AUDIO_STREAM_MUSIC on tablets.
5458// AUDIO_STREAM_DTMF tracks AUDIO_STREAM_VOICE_CALL while in call (See AudioService.java).
5459// The range is constrained between -24dB and -6dB over speaker and -30dB and -18dB over headset.
5460
5461const AudioPolicyManager::VolumeCurvePoint
5462    AudioPolicyManager::sDefaultSystemVolumeCurve[AudioPolicyManager::VOLCNT] = {
5463    {1, -24.0f}, {33, -18.0f}, {66, -12.0f}, {100, -6.0f}
5464};
5465
5466const AudioPolicyManager::VolumeCurvePoint
5467    AudioPolicyManager::sDefaultSystemVolumeCurveDrc[AudioPolicyManager::VOLCNT] = {
5468    {1, -34.0f}, {33, -24.0f}, {66, -15.0f}, {100, -6.0f}
5469};
5470
5471const AudioPolicyManager::VolumeCurvePoint
5472    AudioPolicyManager::sHeadsetSystemVolumeCurve[AudioPolicyManager::VOLCNT] = {
5473    {1, -30.0f}, {33, -26.0f}, {66, -22.0f}, {100, -18.0f}
5474};
5475
5476const AudioPolicyManager::VolumeCurvePoint
5477    AudioPolicyManager::sDefaultVoiceVolumeCurve[AudioPolicyManager::VOLCNT] = {
5478    {0, -42.0f}, {33, -28.0f}, {66, -14.0f}, {100, 0.0f}
5479};
5480
5481const AudioPolicyManager::VolumeCurvePoint
5482    AudioPolicyManager::sSpeakerVoiceVolumeCurve[AudioPolicyManager::VOLCNT] = {
5483    {0, -24.0f}, {33, -16.0f}, {66, -8.0f}, {100, 0.0f}
5484};
5485
5486const AudioPolicyManager::VolumeCurvePoint
5487    AudioPolicyManager::sLinearVolumeCurve[AudioPolicyManager::VOLCNT] = {
5488    {0, -96.0f}, {33, -68.0f}, {66, -34.0f}, {100, 0.0f}
5489};
5490
5491const AudioPolicyManager::VolumeCurvePoint
5492    AudioPolicyManager::sSilentVolumeCurve[AudioPolicyManager::VOLCNT] = {
5493    {0, -96.0f}, {1, -96.0f}, {2, -96.0f}, {100, -96.0f}
5494};
5495
5496const AudioPolicyManager::VolumeCurvePoint
5497    AudioPolicyManager::sFullScaleVolumeCurve[AudioPolicyManager::VOLCNT] = {
5498    {0, 0.0f}, {1, 0.0f}, {2, 0.0f}, {100, 0.0f}
5499};
5500
5501const AudioPolicyManager::VolumeCurvePoint
5502            *AudioPolicyManager::sVolumeProfiles[AUDIO_STREAM_CNT]
5503                                                   [AudioPolicyManager::DEVICE_CATEGORY_CNT] = {
5504    { // AUDIO_STREAM_VOICE_CALL
5505        sDefaultVoiceVolumeCurve, // DEVICE_CATEGORY_HEADSET
5506        sSpeakerVoiceVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5507        sDefaultVoiceVolumeCurve, // DEVICE_CATEGORY_EARPIECE
5508        sDefaultMediaVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5509    },
5510    { // AUDIO_STREAM_SYSTEM
5511        sHeadsetSystemVolumeCurve, // DEVICE_CATEGORY_HEADSET
5512        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5513        sDefaultSystemVolumeCurve,  // DEVICE_CATEGORY_EARPIECE
5514        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5515    },
5516    { // AUDIO_STREAM_RING
5517        sDefaultVolumeCurve, // DEVICE_CATEGORY_HEADSET
5518        sSpeakerSonificationVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5519        sDefaultVolumeCurve,  // DEVICE_CATEGORY_EARPIECE
5520        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5521    },
5522    { // AUDIO_STREAM_MUSIC
5523        sDefaultMediaVolumeCurve, // DEVICE_CATEGORY_HEADSET
5524        sSpeakerMediaVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5525        sDefaultMediaVolumeCurve, // DEVICE_CATEGORY_EARPIECE
5526        sDefaultMediaVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5527    },
5528    { // AUDIO_STREAM_ALARM
5529        sDefaultVolumeCurve, // DEVICE_CATEGORY_HEADSET
5530        sSpeakerSonificationVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5531        sDefaultVolumeCurve,  // DEVICE_CATEGORY_EARPIECE
5532        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5533    },
5534    { // AUDIO_STREAM_NOTIFICATION
5535        sDefaultVolumeCurve, // DEVICE_CATEGORY_HEADSET
5536        sSpeakerSonificationVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5537        sDefaultVolumeCurve,  // DEVICE_CATEGORY_EARPIECE
5538        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5539    },
5540    { // AUDIO_STREAM_BLUETOOTH_SCO
5541        sDefaultVoiceVolumeCurve, // DEVICE_CATEGORY_HEADSET
5542        sSpeakerVoiceVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5543        sDefaultVoiceVolumeCurve, // DEVICE_CATEGORY_EARPIECE
5544        sDefaultMediaVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5545    },
5546    { // AUDIO_STREAM_ENFORCED_AUDIBLE
5547        sHeadsetSystemVolumeCurve, // DEVICE_CATEGORY_HEADSET
5548        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5549        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_EARPIECE
5550        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5551    },
5552    {  // AUDIO_STREAM_DTMF
5553        sHeadsetSystemVolumeCurve, // DEVICE_CATEGORY_HEADSET
5554        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5555        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_EARPIECE
5556        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5557    },
5558    { // AUDIO_STREAM_TTS
5559      // "Transmitted Through Speaker": always silent except on DEVICE_CATEGORY_SPEAKER
5560        sSilentVolumeCurve, // DEVICE_CATEGORY_HEADSET
5561        sLinearVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5562        sSilentVolumeCurve, // DEVICE_CATEGORY_EARPIECE
5563        sSilentVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5564    },
5565    { // AUDIO_STREAM_ACCESSIBILITY
5566        sDefaultMediaVolumeCurve, // DEVICE_CATEGORY_HEADSET
5567        sSpeakerMediaVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5568        sDefaultMediaVolumeCurve, // DEVICE_CATEGORY_EARPIECE
5569        sDefaultMediaVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5570    },
5571    { // AUDIO_STREAM_REROUTING
5572        sFullScaleVolumeCurve, // DEVICE_CATEGORY_HEADSET
5573        sFullScaleVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5574        sFullScaleVolumeCurve, // DEVICE_CATEGORY_EARPIECE
5575        sFullScaleVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5576    },
5577    { // AUDIO_STREAM_PATCH
5578        sFullScaleVolumeCurve, // DEVICE_CATEGORY_HEADSET
5579        sFullScaleVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5580        sFullScaleVolumeCurve, // DEVICE_CATEGORY_EARPIECE
5581        sFullScaleVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5582    },
5583};
5584
5585void AudioPolicyManager::initializeVolumeCurves()
5586{
5587    for (int i = 0; i < AUDIO_STREAM_CNT; i++) {
5588        for (int j = 0; j < DEVICE_CATEGORY_CNT; j++) {
5589            mStreams[i].mVolumeCurve[j] =
5590                    sVolumeProfiles[i][j];
5591        }
5592    }
5593
5594    // Check availability of DRC on speaker path: if available, override some of the speaker curves
5595    if (mSpeakerDrcEnabled) {
5596        mStreams[AUDIO_STREAM_SYSTEM].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
5597                sDefaultSystemVolumeCurveDrc;
5598        mStreams[AUDIO_STREAM_RING].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
5599                sSpeakerSonificationVolumeCurveDrc;
5600        mStreams[AUDIO_STREAM_ALARM].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
5601                sSpeakerSonificationVolumeCurveDrc;
5602        mStreams[AUDIO_STREAM_NOTIFICATION].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
5603                sSpeakerSonificationVolumeCurveDrc;
5604        mStreams[AUDIO_STREAM_MUSIC].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
5605                sSpeakerMediaVolumeCurveDrc;
5606        mStreams[AUDIO_STREAM_ACCESSIBILITY].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
5607                sSpeakerMediaVolumeCurveDrc;
5608    }
5609}
5610
5611float AudioPolicyManager::computeVolume(audio_stream_type_t stream,
5612                                            int index,
5613                                            audio_io_handle_t output,
5614                                            audio_devices_t device)
5615{
5616    float volume = 1.0;
5617    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
5618    StreamDescriptor &streamDesc = mStreams[stream];
5619
5620    if (device == AUDIO_DEVICE_NONE) {
5621        device = outputDesc->device();
5622    }
5623
5624    volume = volIndexToAmpl(device, streamDesc, index);
5625
5626    // if a headset is connected, apply the following rules to ring tones and notifications
5627    // to avoid sound level bursts in user's ears:
5628    // - always attenuate ring tones and notifications volume by 6dB
5629    // - if music is playing, always limit the volume to current music volume,
5630    // with a minimum threshold at -36dB so that notification is always perceived.
5631    const routing_strategy stream_strategy = getStrategy(stream);
5632    if ((device & (AUDIO_DEVICE_OUT_BLUETOOTH_A2DP |
5633            AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES |
5634            AUDIO_DEVICE_OUT_WIRED_HEADSET |
5635            AUDIO_DEVICE_OUT_WIRED_HEADPHONE)) &&
5636        ((stream_strategy == STRATEGY_SONIFICATION)
5637                || (stream_strategy == STRATEGY_SONIFICATION_RESPECTFUL)
5638                || (stream == AUDIO_STREAM_SYSTEM)
5639                || ((stream_strategy == STRATEGY_ENFORCED_AUDIBLE) &&
5640                    (mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] == AUDIO_POLICY_FORCE_NONE))) &&
5641        streamDesc.mCanBeMuted) {
5642        volume *= SONIFICATION_HEADSET_VOLUME_FACTOR;
5643        // when the phone is ringing we must consider that music could have been paused just before
5644        // by the music application and behave as if music was active if the last music track was
5645        // just stopped
5646        if (isStreamActive(AUDIO_STREAM_MUSIC, SONIFICATION_HEADSET_MUSIC_DELAY) ||
5647                mLimitRingtoneVolume) {
5648            audio_devices_t musicDevice = getDeviceForStrategy(STRATEGY_MEDIA, true /*fromCache*/);
5649            float musicVol = computeVolume(AUDIO_STREAM_MUSIC,
5650                               mStreams[AUDIO_STREAM_MUSIC].getVolumeIndex(musicDevice),
5651                               output,
5652                               musicDevice);
5653            float minVol = (musicVol > SONIFICATION_HEADSET_VOLUME_MIN) ?
5654                                musicVol : SONIFICATION_HEADSET_VOLUME_MIN;
5655            if (volume > minVol) {
5656                volume = minVol;
5657                ALOGV("computeVolume limiting volume to %f musicVol %f", minVol, musicVol);
5658            }
5659        }
5660    }
5661
5662    return volume;
5663}
5664
5665status_t AudioPolicyManager::checkAndSetVolume(audio_stream_type_t stream,
5666                                                   int index,
5667                                                   audio_io_handle_t output,
5668                                                   audio_devices_t device,
5669                                                   int delayMs,
5670                                                   bool force)
5671{
5672
5673    // do not change actual stream volume if the stream is muted
5674    if (mOutputs.valueFor(output)->mMuteCount[stream] != 0) {
5675        ALOGVV("checkAndSetVolume() stream %d muted count %d",
5676              stream, mOutputs.valueFor(output)->mMuteCount[stream]);
5677        return NO_ERROR;
5678    }
5679
5680    // do not change in call volume if bluetooth is connected and vice versa
5681    if ((stream == AUDIO_STREAM_VOICE_CALL &&
5682            mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION] == AUDIO_POLICY_FORCE_BT_SCO) ||
5683        (stream == AUDIO_STREAM_BLUETOOTH_SCO &&
5684                mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION] != AUDIO_POLICY_FORCE_BT_SCO)) {
5685        ALOGV("checkAndSetVolume() cannot set stream %d volume with force use = %d for comm",
5686             stream, mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION]);
5687        return INVALID_OPERATION;
5688    }
5689
5690    float volume = computeVolume(stream, index, output, device);
5691    // unit gain if rerouting to external policy
5692    if (device == AUDIO_DEVICE_OUT_REMOTE_SUBMIX) {
5693        ssize_t index = mOutputs.indexOfKey(output);
5694        if (index >= 0) {
5695            sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(index);
5696            if (outputDesc->mPolicyMix != NULL) {
5697                ALOGV("max gain when rerouting for output=%d", output);
5698                volume = 1.0f;
5699            }
5700        }
5701
5702    }
5703    // We actually change the volume if:
5704    // - the float value returned by computeVolume() changed
5705    // - the force flag is set
5706    if (volume != mOutputs.valueFor(output)->mCurVolume[stream] ||
5707            force) {
5708        mOutputs.valueFor(output)->mCurVolume[stream] = volume;
5709        ALOGVV("checkAndSetVolume() for output %d stream %d, volume %f, delay %d", output, stream, volume, delayMs);
5710        // Force VOICE_CALL to track BLUETOOTH_SCO stream volume when bluetooth audio is
5711        // enabled
5712        if (stream == AUDIO_STREAM_BLUETOOTH_SCO) {
5713            mpClientInterface->setStreamVolume(AUDIO_STREAM_VOICE_CALL, volume, output, delayMs);
5714        }
5715        mpClientInterface->setStreamVolume(stream, volume, output, delayMs);
5716    }
5717
5718    if (stream == AUDIO_STREAM_VOICE_CALL ||
5719        stream == AUDIO_STREAM_BLUETOOTH_SCO) {
5720        float voiceVolume;
5721        // Force voice volume to max for bluetooth SCO as volume is managed by the headset
5722        if (stream == AUDIO_STREAM_VOICE_CALL) {
5723            voiceVolume = (float)index/(float)mStreams[stream].mIndexMax;
5724        } else {
5725            voiceVolume = 1.0;
5726        }
5727
5728        if (voiceVolume != mLastVoiceVolume && output == mPrimaryOutput) {
5729            mpClientInterface->setVoiceVolume(voiceVolume, delayMs);
5730            mLastVoiceVolume = voiceVolume;
5731        }
5732    }
5733
5734    return NO_ERROR;
5735}
5736
5737void AudioPolicyManager::applyStreamVolumes(audio_io_handle_t output,
5738                                                audio_devices_t device,
5739                                                int delayMs,
5740                                                bool force)
5741{
5742    ALOGVV("applyStreamVolumes() for output %d and device %x", output, device);
5743
5744    for (int stream = 0; stream < AUDIO_STREAM_CNT; stream++) {
5745        if (stream == AUDIO_STREAM_PATCH) {
5746            continue;
5747        }
5748        checkAndSetVolume((audio_stream_type_t)stream,
5749                          mStreams[stream].getVolumeIndex(device),
5750                          output,
5751                          device,
5752                          delayMs,
5753                          force);
5754    }
5755}
5756
5757void AudioPolicyManager::setStrategyMute(routing_strategy strategy,
5758                                             bool on,
5759                                             audio_io_handle_t output,
5760                                             int delayMs,
5761                                             audio_devices_t device)
5762{
5763    ALOGVV("setStrategyMute() strategy %d, mute %d, output %d", strategy, on, output);
5764    for (int stream = 0; stream < AUDIO_STREAM_CNT; stream++) {
5765        if (stream == AUDIO_STREAM_PATCH) {
5766            continue;
5767        }
5768        if (getStrategy((audio_stream_type_t)stream) == strategy) {
5769            setStreamMute((audio_stream_type_t)stream, on, output, delayMs, device);
5770        }
5771    }
5772}
5773
5774void AudioPolicyManager::setStreamMute(audio_stream_type_t stream,
5775                                           bool on,
5776                                           audio_io_handle_t output,
5777                                           int delayMs,
5778                                           audio_devices_t device)
5779{
5780    StreamDescriptor &streamDesc = mStreams[stream];
5781    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
5782    if (device == AUDIO_DEVICE_NONE) {
5783        device = outputDesc->device();
5784    }
5785
5786    ALOGVV("setStreamMute() stream %d, mute %d, output %d, mMuteCount %d device %04x",
5787          stream, on, output, outputDesc->mMuteCount[stream], device);
5788
5789    if (on) {
5790        if (outputDesc->mMuteCount[stream] == 0) {
5791            if (streamDesc.mCanBeMuted &&
5792                    ((stream != AUDIO_STREAM_ENFORCED_AUDIBLE) ||
5793                     (mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] == AUDIO_POLICY_FORCE_NONE))) {
5794                checkAndSetVolume(stream, 0, output, device, delayMs);
5795            }
5796        }
5797        // increment mMuteCount after calling checkAndSetVolume() so that volume change is not ignored
5798        outputDesc->mMuteCount[stream]++;
5799    } else {
5800        if (outputDesc->mMuteCount[stream] == 0) {
5801            ALOGV("setStreamMute() unmuting non muted stream!");
5802            return;
5803        }
5804        if (--outputDesc->mMuteCount[stream] == 0) {
5805            checkAndSetVolume(stream,
5806                              streamDesc.getVolumeIndex(device),
5807                              output,
5808                              device,
5809                              delayMs);
5810        }
5811    }
5812}
5813
5814void AudioPolicyManager::handleIncallSonification(audio_stream_type_t stream,
5815                                                      bool starting, bool stateChange)
5816{
5817    // if the stream pertains to sonification strategy and we are in call we must
5818    // mute the stream if it is low visibility. If it is high visibility, we must play a tone
5819    // in the device used for phone strategy and play the tone if the selected device does not
5820    // interfere with the device used for phone strategy
5821    // if stateChange is true, we are called from setPhoneState() and we must mute or unmute as
5822    // many times as there are active tracks on the output
5823    const routing_strategy stream_strategy = getStrategy(stream);
5824    if ((stream_strategy == STRATEGY_SONIFICATION) ||
5825            ((stream_strategy == STRATEGY_SONIFICATION_RESPECTFUL))) {
5826        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(mPrimaryOutput);
5827        ALOGV("handleIncallSonification() stream %d starting %d device %x stateChange %d",
5828                stream, starting, outputDesc->mDevice, stateChange);
5829        if (outputDesc->mRefCount[stream]) {
5830            int muteCount = 1;
5831            if (stateChange) {
5832                muteCount = outputDesc->mRefCount[stream];
5833            }
5834            if (audio_is_low_visibility(stream)) {
5835                ALOGV("handleIncallSonification() low visibility, muteCount %d", muteCount);
5836                for (int i = 0; i < muteCount; i++) {
5837                    setStreamMute(stream, starting, mPrimaryOutput);
5838                }
5839            } else {
5840                ALOGV("handleIncallSonification() high visibility");
5841                if (outputDesc->device() &
5842                        getDeviceForStrategy(STRATEGY_PHONE, true /*fromCache*/)) {
5843                    ALOGV("handleIncallSonification() high visibility muted, muteCount %d", muteCount);
5844                    for (int i = 0; i < muteCount; i++) {
5845                        setStreamMute(stream, starting, mPrimaryOutput);
5846                    }
5847                }
5848                if (starting) {
5849                    mpClientInterface->startTone(AUDIO_POLICY_TONE_IN_CALL_NOTIFICATION,
5850                                                 AUDIO_STREAM_VOICE_CALL);
5851                } else {
5852                    mpClientInterface->stopTone();
5853                }
5854            }
5855        }
5856    }
5857}
5858
5859bool AudioPolicyManager::isInCall()
5860{
5861    return isStateInCall(mPhoneState);
5862}
5863
5864bool AudioPolicyManager::isStateInCall(int state) {
5865    return ((state == AUDIO_MODE_IN_CALL) ||
5866            (state == AUDIO_MODE_IN_COMMUNICATION));
5867}
5868
5869uint32_t AudioPolicyManager::getMaxEffectsCpuLoad()
5870{
5871    return MAX_EFFECTS_CPU_LOAD;
5872}
5873
5874uint32_t AudioPolicyManager::getMaxEffectsMemory()
5875{
5876    return MAX_EFFECTS_MEMORY;
5877}
5878
5879
5880// --- AudioOutputDescriptor class implementation
5881
5882AudioPolicyManager::AudioOutputDescriptor::AudioOutputDescriptor(
5883        const sp<IOProfile>& profile)
5884    : mId(0), mIoHandle(0), mLatency(0),
5885    mFlags((audio_output_flags_t)0), mDevice(AUDIO_DEVICE_NONE), mPolicyMix(NULL),
5886    mPatchHandle(0),
5887    mOutput1(0), mOutput2(0), mProfile(profile), mDirectOpenCount(0)
5888{
5889    // clear usage count for all stream types
5890    for (int i = 0; i < AUDIO_STREAM_CNT; i++) {
5891        mRefCount[i] = 0;
5892        mCurVolume[i] = -1.0;
5893        mMuteCount[i] = 0;
5894        mStopTime[i] = 0;
5895    }
5896    for (int i = 0; i < NUM_STRATEGIES; i++) {
5897        mStrategyMutedByDevice[i] = false;
5898    }
5899    if (profile != NULL) {
5900        mFlags = (audio_output_flags_t)profile->mFlags;
5901        mSamplingRate = profile->pickSamplingRate();
5902        mFormat = profile->pickFormat();
5903        mChannelMask = profile->pickChannelMask();
5904        if (profile->mGains.size() > 0) {
5905            profile->mGains[0]->getDefaultConfig(&mGain);
5906        }
5907    }
5908}
5909
5910audio_devices_t AudioPolicyManager::AudioOutputDescriptor::device() const
5911{
5912    if (isDuplicated()) {
5913        return (audio_devices_t)(mOutput1->mDevice | mOutput2->mDevice);
5914    } else {
5915        return mDevice;
5916    }
5917}
5918
5919uint32_t AudioPolicyManager::AudioOutputDescriptor::latency()
5920{
5921    if (isDuplicated()) {
5922        return (mOutput1->mLatency > mOutput2->mLatency) ? mOutput1->mLatency : mOutput2->mLatency;
5923    } else {
5924        return mLatency;
5925    }
5926}
5927
5928bool AudioPolicyManager::AudioOutputDescriptor::sharesHwModuleWith(
5929        const sp<AudioOutputDescriptor> outputDesc)
5930{
5931    if (isDuplicated()) {
5932        return mOutput1->sharesHwModuleWith(outputDesc) || mOutput2->sharesHwModuleWith(outputDesc);
5933    } else if (outputDesc->isDuplicated()){
5934        return sharesHwModuleWith(outputDesc->mOutput1) || sharesHwModuleWith(outputDesc->mOutput2);
5935    } else {
5936        return (mProfile->mModule == outputDesc->mProfile->mModule);
5937    }
5938}
5939
5940void AudioPolicyManager::AudioOutputDescriptor::changeRefCount(audio_stream_type_t stream,
5941                                                                   int delta)
5942{
5943    // forward usage count change to attached outputs
5944    if (isDuplicated()) {
5945        mOutput1->changeRefCount(stream, delta);
5946        mOutput2->changeRefCount(stream, delta);
5947    }
5948    if ((delta + (int)mRefCount[stream]) < 0) {
5949        ALOGW("changeRefCount() invalid delta %d for stream %d, refCount %d",
5950              delta, stream, mRefCount[stream]);
5951        mRefCount[stream] = 0;
5952        return;
5953    }
5954    mRefCount[stream] += delta;
5955    ALOGV("changeRefCount() stream %d, count %d", stream, mRefCount[stream]);
5956}
5957
5958audio_devices_t AudioPolicyManager::AudioOutputDescriptor::supportedDevices()
5959{
5960    if (isDuplicated()) {
5961        return (audio_devices_t)(mOutput1->supportedDevices() | mOutput2->supportedDevices());
5962    } else {
5963        return mProfile->mSupportedDevices.types() ;
5964    }
5965}
5966
5967bool AudioPolicyManager::AudioOutputDescriptor::isActive(uint32_t inPastMs) const
5968{
5969    return isStrategyActive(NUM_STRATEGIES, inPastMs);
5970}
5971
5972bool AudioPolicyManager::AudioOutputDescriptor::isStrategyActive(routing_strategy strategy,
5973                                                                       uint32_t inPastMs,
5974                                                                       nsecs_t sysTime) const
5975{
5976    if ((sysTime == 0) && (inPastMs != 0)) {
5977        sysTime = systemTime();
5978    }
5979    for (int i = 0; i < (int)AUDIO_STREAM_CNT; i++) {
5980        if (i == AUDIO_STREAM_PATCH) {
5981            continue;
5982        }
5983        if (((getStrategy((audio_stream_type_t)i) == strategy) ||
5984                (NUM_STRATEGIES == strategy)) &&
5985                isStreamActive((audio_stream_type_t)i, inPastMs, sysTime)) {
5986            return true;
5987        }
5988    }
5989    return false;
5990}
5991
5992bool AudioPolicyManager::AudioOutputDescriptor::isStreamActive(audio_stream_type_t stream,
5993                                                                       uint32_t inPastMs,
5994                                                                       nsecs_t sysTime) const
5995{
5996    if (mRefCount[stream] != 0) {
5997        return true;
5998    }
5999    if (inPastMs == 0) {
6000        return false;
6001    }
6002    if (sysTime == 0) {
6003        sysTime = systemTime();
6004    }
6005    if (ns2ms(sysTime - mStopTime[stream]) < inPastMs) {
6006        return true;
6007    }
6008    return false;
6009}
6010
6011void AudioPolicyManager::AudioOutputDescriptor::toAudioPortConfig(
6012                                                 struct audio_port_config *dstConfig,
6013                                                 const struct audio_port_config *srcConfig) const
6014{
6015    ALOG_ASSERT(!isDuplicated(), "toAudioPortConfig() called on duplicated output %d", mIoHandle);
6016
6017    dstConfig->config_mask = AUDIO_PORT_CONFIG_SAMPLE_RATE|AUDIO_PORT_CONFIG_CHANNEL_MASK|
6018                            AUDIO_PORT_CONFIG_FORMAT|AUDIO_PORT_CONFIG_GAIN;
6019    if (srcConfig != NULL) {
6020        dstConfig->config_mask |= srcConfig->config_mask;
6021    }
6022    AudioPortConfig::toAudioPortConfig(dstConfig, srcConfig);
6023
6024    dstConfig->id = mId;
6025    dstConfig->role = AUDIO_PORT_ROLE_SOURCE;
6026    dstConfig->type = AUDIO_PORT_TYPE_MIX;
6027    dstConfig->ext.mix.hw_module = mProfile->mModule->mHandle;
6028    dstConfig->ext.mix.handle = mIoHandle;
6029    dstConfig->ext.mix.usecase.stream = AUDIO_STREAM_DEFAULT;
6030}
6031
6032void AudioPolicyManager::AudioOutputDescriptor::toAudioPort(
6033                                                    struct audio_port *port) const
6034{
6035    ALOG_ASSERT(!isDuplicated(), "toAudioPort() called on duplicated output %d", mIoHandle);
6036    mProfile->toAudioPort(port);
6037    port->id = mId;
6038    toAudioPortConfig(&port->active_config);
6039    port->ext.mix.hw_module = mProfile->mModule->mHandle;
6040    port->ext.mix.handle = mIoHandle;
6041    port->ext.mix.latency_class =
6042            mFlags & AUDIO_OUTPUT_FLAG_FAST ? AUDIO_LATENCY_LOW : AUDIO_LATENCY_NORMAL;
6043}
6044
6045status_t AudioPolicyManager::AudioOutputDescriptor::dump(int fd)
6046{
6047    const size_t SIZE = 256;
6048    char buffer[SIZE];
6049    String8 result;
6050
6051    snprintf(buffer, SIZE, " ID: %d\n", mId);
6052    result.append(buffer);
6053    snprintf(buffer, SIZE, " Sampling rate: %d\n", mSamplingRate);
6054    result.append(buffer);
6055    snprintf(buffer, SIZE, " Format: %08x\n", mFormat);
6056    result.append(buffer);
6057    snprintf(buffer, SIZE, " Channels: %08x\n", mChannelMask);
6058    result.append(buffer);
6059    snprintf(buffer, SIZE, " Latency: %d\n", mLatency);
6060    result.append(buffer);
6061    snprintf(buffer, SIZE, " Flags %08x\n", mFlags);
6062    result.append(buffer);
6063    snprintf(buffer, SIZE, " Devices %08x\n", device());
6064    result.append(buffer);
6065    snprintf(buffer, SIZE, " Stream volume refCount muteCount\n");
6066    result.append(buffer);
6067    for (int i = 0; i < (int)AUDIO_STREAM_CNT; i++) {
6068        snprintf(buffer, SIZE, " %02d     %.03f     %02d       %02d\n",
6069                 i, mCurVolume[i], mRefCount[i], mMuteCount[i]);
6070        result.append(buffer);
6071    }
6072    write(fd, result.string(), result.size());
6073
6074    return NO_ERROR;
6075}
6076
6077// --- AudioInputDescriptor class implementation
6078
6079AudioPolicyManager::AudioInputDescriptor::AudioInputDescriptor(const sp<IOProfile>& profile)
6080    : mId(0), mIoHandle(0),
6081      mDevice(AUDIO_DEVICE_NONE), mPolicyMix(NULL), mPatchHandle(0), mRefCount(0),
6082      mInputSource(AUDIO_SOURCE_DEFAULT), mProfile(profile), mIsSoundTrigger(false)
6083{
6084    if (profile != NULL) {
6085        mSamplingRate = profile->pickSamplingRate();
6086        mFormat = profile->pickFormat();
6087        mChannelMask = profile->pickChannelMask();
6088        if (profile->mGains.size() > 0) {
6089            profile->mGains[0]->getDefaultConfig(&mGain);
6090        }
6091    }
6092}
6093
6094void AudioPolicyManager::AudioInputDescriptor::toAudioPortConfig(
6095                                                   struct audio_port_config *dstConfig,
6096                                                   const struct audio_port_config *srcConfig) const
6097{
6098    ALOG_ASSERT(mProfile != 0,
6099                "toAudioPortConfig() called on input with null profile %d", mIoHandle);
6100    dstConfig->config_mask = AUDIO_PORT_CONFIG_SAMPLE_RATE|AUDIO_PORT_CONFIG_CHANNEL_MASK|
6101                            AUDIO_PORT_CONFIG_FORMAT|AUDIO_PORT_CONFIG_GAIN;
6102    if (srcConfig != NULL) {
6103        dstConfig->config_mask |= srcConfig->config_mask;
6104    }
6105
6106    AudioPortConfig::toAudioPortConfig(dstConfig, srcConfig);
6107
6108    dstConfig->id = mId;
6109    dstConfig->role = AUDIO_PORT_ROLE_SINK;
6110    dstConfig->type = AUDIO_PORT_TYPE_MIX;
6111    dstConfig->ext.mix.hw_module = mProfile->mModule->mHandle;
6112    dstConfig->ext.mix.handle = mIoHandle;
6113    dstConfig->ext.mix.usecase.source = mInputSource;
6114}
6115
6116void AudioPolicyManager::AudioInputDescriptor::toAudioPort(
6117                                                    struct audio_port *port) const
6118{
6119    ALOG_ASSERT(mProfile != 0, "toAudioPort() called on input with null profile %d", mIoHandle);
6120
6121    mProfile->toAudioPort(port);
6122    port->id = mId;
6123    toAudioPortConfig(&port->active_config);
6124    port->ext.mix.hw_module = mProfile->mModule->mHandle;
6125    port->ext.mix.handle = mIoHandle;
6126    port->ext.mix.latency_class = AUDIO_LATENCY_NORMAL;
6127}
6128
6129status_t AudioPolicyManager::AudioInputDescriptor::dump(int fd)
6130{
6131    const size_t SIZE = 256;
6132    char buffer[SIZE];
6133    String8 result;
6134
6135    snprintf(buffer, SIZE, " ID: %d\n", mId);
6136    result.append(buffer);
6137    snprintf(buffer, SIZE, " Sampling rate: %d\n", mSamplingRate);
6138    result.append(buffer);
6139    snprintf(buffer, SIZE, " Format: %d\n", mFormat);
6140    result.append(buffer);
6141    snprintf(buffer, SIZE, " Channels: %08x\n", mChannelMask);
6142    result.append(buffer);
6143    snprintf(buffer, SIZE, " Devices %08x\n", mDevice);
6144    result.append(buffer);
6145    snprintf(buffer, SIZE, " Ref Count %d\n", mRefCount);
6146    result.append(buffer);
6147    snprintf(buffer, SIZE, " Open Ref Count %d\n", mOpenRefCount);
6148    result.append(buffer);
6149
6150    write(fd, result.string(), result.size());
6151
6152    return NO_ERROR;
6153}
6154
6155// --- StreamDescriptor class implementation
6156
6157AudioPolicyManager::StreamDescriptor::StreamDescriptor()
6158    :   mIndexMin(0), mIndexMax(1), mCanBeMuted(true)
6159{
6160    mIndexCur.add(AUDIO_DEVICE_OUT_DEFAULT, 0);
6161}
6162
6163int AudioPolicyManager::StreamDescriptor::getVolumeIndex(audio_devices_t device)
6164{
6165    device = AudioPolicyManager::getDeviceForVolume(device);
6166    // there is always a valid entry for AUDIO_DEVICE_OUT_DEFAULT
6167    if (mIndexCur.indexOfKey(device) < 0) {
6168        device = AUDIO_DEVICE_OUT_DEFAULT;
6169    }
6170    return mIndexCur.valueFor(device);
6171}
6172
6173void AudioPolicyManager::StreamDescriptor::dump(int fd)
6174{
6175    const size_t SIZE = 256;
6176    char buffer[SIZE];
6177    String8 result;
6178
6179    snprintf(buffer, SIZE, "%s         %02d         %02d         ",
6180             mCanBeMuted ? "true " : "false", mIndexMin, mIndexMax);
6181    result.append(buffer);
6182    for (size_t i = 0; i < mIndexCur.size(); i++) {
6183        snprintf(buffer, SIZE, "%04x : %02d, ",
6184                 mIndexCur.keyAt(i),
6185                 mIndexCur.valueAt(i));
6186        result.append(buffer);
6187    }
6188    result.append("\n");
6189
6190    write(fd, result.string(), result.size());
6191}
6192
6193// --- EffectDescriptor class implementation
6194
6195status_t AudioPolicyManager::EffectDescriptor::dump(int fd)
6196{
6197    const size_t SIZE = 256;
6198    char buffer[SIZE];
6199    String8 result;
6200
6201    snprintf(buffer, SIZE, " I/O: %d\n", mIo);
6202    result.append(buffer);
6203    snprintf(buffer, SIZE, " Strategy: %d\n", mStrategy);
6204    result.append(buffer);
6205    snprintf(buffer, SIZE, " Session: %d\n", mSession);
6206    result.append(buffer);
6207    snprintf(buffer, SIZE, " Name: %s\n",  mDesc.name);
6208    result.append(buffer);
6209    snprintf(buffer, SIZE, " %s\n",  mEnabled ? "Enabled" : "Disabled");
6210    result.append(buffer);
6211    write(fd, result.string(), result.size());
6212
6213    return NO_ERROR;
6214}
6215
6216// --- HwModule class implementation
6217
6218AudioPolicyManager::HwModule::HwModule(const char *name)
6219    : mName(strndup(name, AUDIO_HARDWARE_MODULE_ID_MAX_LEN)),
6220      mHalVersion(AUDIO_DEVICE_API_VERSION_MIN), mHandle(0)
6221{
6222}
6223
6224AudioPolicyManager::HwModule::~HwModule()
6225{
6226    for (size_t i = 0; i < mOutputProfiles.size(); i++) {
6227        mOutputProfiles[i]->mSupportedDevices.clear();
6228    }
6229    for (size_t i = 0; i < mInputProfiles.size(); i++) {
6230        mInputProfiles[i]->mSupportedDevices.clear();
6231    }
6232    free((void *)mName);
6233}
6234
6235status_t AudioPolicyManager::HwModule::loadInput(cnode *root)
6236{
6237    cnode *node = root->first_child;
6238
6239    sp<IOProfile> profile = new IOProfile(String8(root->name), AUDIO_PORT_ROLE_SINK, this);
6240
6241    while (node) {
6242        if (strcmp(node->name, SAMPLING_RATES_TAG) == 0) {
6243            profile->loadSamplingRates((char *)node->value);
6244        } else if (strcmp(node->name, FORMATS_TAG) == 0) {
6245            profile->loadFormats((char *)node->value);
6246        } else if (strcmp(node->name, CHANNELS_TAG) == 0) {
6247            profile->loadInChannels((char *)node->value);
6248        } else if (strcmp(node->name, DEVICES_TAG) == 0) {
6249            profile->mSupportedDevices.loadDevicesFromName((char *)node->value,
6250                                                           mDeclaredDevices);
6251        } else if (strcmp(node->name, FLAGS_TAG) == 0) {
6252            profile->mFlags = parseInputFlagNames((char *)node->value);
6253        } else if (strcmp(node->name, GAINS_TAG) == 0) {
6254            profile->loadGains(node);
6255        }
6256        node = node->next;
6257    }
6258    ALOGW_IF(profile->mSupportedDevices.isEmpty(),
6259            "loadInput() invalid supported devices");
6260    ALOGW_IF(profile->mChannelMasks.size() == 0,
6261            "loadInput() invalid supported channel masks");
6262    ALOGW_IF(profile->mSamplingRates.size() == 0,
6263            "loadInput() invalid supported sampling rates");
6264    ALOGW_IF(profile->mFormats.size() == 0,
6265            "loadInput() invalid supported formats");
6266    if (!profile->mSupportedDevices.isEmpty() &&
6267            (profile->mChannelMasks.size() != 0) &&
6268            (profile->mSamplingRates.size() != 0) &&
6269            (profile->mFormats.size() != 0)) {
6270
6271        ALOGV("loadInput() adding input Supported Devices %04x",
6272              profile->mSupportedDevices.types());
6273
6274        mInputProfiles.add(profile);
6275        return NO_ERROR;
6276    } else {
6277        return BAD_VALUE;
6278    }
6279}
6280
6281status_t AudioPolicyManager::HwModule::loadOutput(cnode *root)
6282{
6283    cnode *node = root->first_child;
6284
6285    sp<IOProfile> profile = new IOProfile(String8(root->name), AUDIO_PORT_ROLE_SOURCE, this);
6286
6287    while (node) {
6288        if (strcmp(node->name, SAMPLING_RATES_TAG) == 0) {
6289            profile->loadSamplingRates((char *)node->value);
6290        } else if (strcmp(node->name, FORMATS_TAG) == 0) {
6291            profile->loadFormats((char *)node->value);
6292        } else if (strcmp(node->name, CHANNELS_TAG) == 0) {
6293            profile->loadOutChannels((char *)node->value);
6294        } else if (strcmp(node->name, DEVICES_TAG) == 0) {
6295            profile->mSupportedDevices.loadDevicesFromName((char *)node->value,
6296                                                           mDeclaredDevices);
6297        } else if (strcmp(node->name, FLAGS_TAG) == 0) {
6298            profile->mFlags = parseOutputFlagNames((char *)node->value);
6299        } else if (strcmp(node->name, GAINS_TAG) == 0) {
6300            profile->loadGains(node);
6301        }
6302        node = node->next;
6303    }
6304    ALOGW_IF(profile->mSupportedDevices.isEmpty(),
6305            "loadOutput() invalid supported devices");
6306    ALOGW_IF(profile->mChannelMasks.size() == 0,
6307            "loadOutput() invalid supported channel masks");
6308    ALOGW_IF(profile->mSamplingRates.size() == 0,
6309            "loadOutput() invalid supported sampling rates");
6310    ALOGW_IF(profile->mFormats.size() == 0,
6311            "loadOutput() invalid supported formats");
6312    if (!profile->mSupportedDevices.isEmpty() &&
6313            (profile->mChannelMasks.size() != 0) &&
6314            (profile->mSamplingRates.size() != 0) &&
6315            (profile->mFormats.size() != 0)) {
6316
6317        ALOGV("loadOutput() adding output Supported Devices %04x, mFlags %04x",
6318              profile->mSupportedDevices.types(), profile->mFlags);
6319
6320        mOutputProfiles.add(profile);
6321        return NO_ERROR;
6322    } else {
6323        return BAD_VALUE;
6324    }
6325}
6326
6327status_t AudioPolicyManager::HwModule::loadDevice(cnode *root)
6328{
6329    cnode *node = root->first_child;
6330
6331    audio_devices_t type = AUDIO_DEVICE_NONE;
6332    while (node) {
6333        if (strcmp(node->name, DEVICE_TYPE) == 0) {
6334            type = parseDeviceNames((char *)node->value);
6335            break;
6336        }
6337        node = node->next;
6338    }
6339    if (type == AUDIO_DEVICE_NONE ||
6340            (!audio_is_input_device(type) && !audio_is_output_device(type))) {
6341        ALOGW("loadDevice() bad type %08x", type);
6342        return BAD_VALUE;
6343    }
6344    sp<DeviceDescriptor> deviceDesc = new DeviceDescriptor(String8(root->name), type);
6345    deviceDesc->mModule = this;
6346
6347    node = root->first_child;
6348    while (node) {
6349        if (strcmp(node->name, DEVICE_ADDRESS) == 0) {
6350            deviceDesc->mAddress = String8((char *)node->value);
6351        } else if (strcmp(node->name, CHANNELS_TAG) == 0) {
6352            if (audio_is_input_device(type)) {
6353                deviceDesc->loadInChannels((char *)node->value);
6354            } else {
6355                deviceDesc->loadOutChannels((char *)node->value);
6356            }
6357        } else if (strcmp(node->name, GAINS_TAG) == 0) {
6358            deviceDesc->loadGains(node);
6359        }
6360        node = node->next;
6361    }
6362
6363    ALOGV("loadDevice() adding device name %s type %08x address %s",
6364          deviceDesc->mName.string(), type, deviceDesc->mAddress.string());
6365
6366    mDeclaredDevices.add(deviceDesc);
6367
6368    return NO_ERROR;
6369}
6370
6371status_t AudioPolicyManager::HwModule::addOutputProfile(String8 name, const audio_config_t *config,
6372                                                  audio_devices_t device, String8 address)
6373{
6374    sp<IOProfile> profile = new IOProfile(name, AUDIO_PORT_ROLE_SOURCE, this);
6375
6376    profile->mSamplingRates.add(config->sample_rate);
6377    profile->mChannelMasks.add(config->channel_mask);
6378    profile->mFormats.add(config->format);
6379
6380    sp<DeviceDescriptor> devDesc = new DeviceDescriptor(String8(""), device);
6381    devDesc->mAddress = address;
6382    profile->mSupportedDevices.add(devDesc);
6383
6384    mOutputProfiles.add(profile);
6385
6386    return NO_ERROR;
6387}
6388
6389status_t AudioPolicyManager::HwModule::removeOutputProfile(String8 name)
6390{
6391    for (size_t i = 0; i < mOutputProfiles.size(); i++) {
6392        if (mOutputProfiles[i]->mName == name) {
6393            mOutputProfiles.removeAt(i);
6394            break;
6395        }
6396    }
6397
6398    return NO_ERROR;
6399}
6400
6401status_t AudioPolicyManager::HwModule::addInputProfile(String8 name, const audio_config_t *config,
6402                                                  audio_devices_t device, String8 address)
6403{
6404    sp<IOProfile> profile = new IOProfile(name, AUDIO_PORT_ROLE_SINK, this);
6405
6406    profile->mSamplingRates.add(config->sample_rate);
6407    profile->mChannelMasks.add(config->channel_mask);
6408    profile->mFormats.add(config->format);
6409
6410    sp<DeviceDescriptor> devDesc = new DeviceDescriptor(String8(""), device);
6411    devDesc->mAddress = address;
6412    profile->mSupportedDevices.add(devDesc);
6413
6414    ALOGV("addInputProfile() name %s rate %d mask 0x08", name.string(), config->sample_rate, config->channel_mask);
6415
6416    mInputProfiles.add(profile);
6417
6418    return NO_ERROR;
6419}
6420
6421status_t AudioPolicyManager::HwModule::removeInputProfile(String8 name)
6422{
6423    for (size_t i = 0; i < mInputProfiles.size(); i++) {
6424        if (mInputProfiles[i]->mName == name) {
6425            mInputProfiles.removeAt(i);
6426            break;
6427        }
6428    }
6429
6430    return NO_ERROR;
6431}
6432
6433
6434void AudioPolicyManager::HwModule::dump(int fd)
6435{
6436    const size_t SIZE = 256;
6437    char buffer[SIZE];
6438    String8 result;
6439
6440    snprintf(buffer, SIZE, "  - name: %s\n", mName);
6441    result.append(buffer);
6442    snprintf(buffer, SIZE, "  - handle: %d\n", mHandle);
6443    result.append(buffer);
6444    snprintf(buffer, SIZE, "  - version: %u.%u\n", mHalVersion >> 8, mHalVersion & 0xFF);
6445    result.append(buffer);
6446    write(fd, result.string(), result.size());
6447    if (mOutputProfiles.size()) {
6448        write(fd, "  - outputs:\n", strlen("  - outputs:\n"));
6449        for (size_t i = 0; i < mOutputProfiles.size(); i++) {
6450            snprintf(buffer, SIZE, "    output %zu:\n", i);
6451            write(fd, buffer, strlen(buffer));
6452            mOutputProfiles[i]->dump(fd);
6453        }
6454    }
6455    if (mInputProfiles.size()) {
6456        write(fd, "  - inputs:\n", strlen("  - inputs:\n"));
6457        for (size_t i = 0; i < mInputProfiles.size(); i++) {
6458            snprintf(buffer, SIZE, "    input %zu:\n", i);
6459            write(fd, buffer, strlen(buffer));
6460            mInputProfiles[i]->dump(fd);
6461        }
6462    }
6463    if (mDeclaredDevices.size()) {
6464        write(fd, "  - devices:\n", strlen("  - devices:\n"));
6465        for (size_t i = 0; i < mDeclaredDevices.size(); i++) {
6466            mDeclaredDevices[i]->dump(fd, 4, i);
6467        }
6468    }
6469}
6470
6471// --- AudioPort class implementation
6472
6473
6474AudioPolicyManager::AudioPort::AudioPort(const String8& name, audio_port_type_t type,
6475          audio_port_role_t role, const sp<HwModule>& module) :
6476    mName(name), mType(type), mRole(role), mModule(module), mFlags(0)
6477{
6478    mUseInChannelMask = ((type == AUDIO_PORT_TYPE_DEVICE) && (role == AUDIO_PORT_ROLE_SOURCE)) ||
6479                    ((type == AUDIO_PORT_TYPE_MIX) && (role == AUDIO_PORT_ROLE_SINK));
6480}
6481
6482void AudioPolicyManager::AudioPort::toAudioPort(struct audio_port *port) const
6483{
6484    port->role = mRole;
6485    port->type = mType;
6486    unsigned int i;
6487    for (i = 0; i < mSamplingRates.size() && i < AUDIO_PORT_MAX_SAMPLING_RATES; i++) {
6488        if (mSamplingRates[i] != 0) {
6489            port->sample_rates[i] = mSamplingRates[i];
6490        }
6491    }
6492    port->num_sample_rates = i;
6493    for (i = 0; i < mChannelMasks.size() && i < AUDIO_PORT_MAX_CHANNEL_MASKS; i++) {
6494        if (mChannelMasks[i] != 0) {
6495            port->channel_masks[i] = mChannelMasks[i];
6496        }
6497    }
6498    port->num_channel_masks = i;
6499    for (i = 0; i < mFormats.size() && i < AUDIO_PORT_MAX_FORMATS; i++) {
6500        if (mFormats[i] != 0) {
6501            port->formats[i] = mFormats[i];
6502        }
6503    }
6504    port->num_formats = i;
6505
6506    ALOGV("AudioPort::toAudioPort() num gains %zu", mGains.size());
6507
6508    for (i = 0; i < mGains.size() && i < AUDIO_PORT_MAX_GAINS; i++) {
6509        port->gains[i] = mGains[i]->mGain;
6510    }
6511    port->num_gains = i;
6512}
6513
6514void AudioPolicyManager::AudioPort::importAudioPort(const sp<AudioPort> port) {
6515    for (size_t k = 0 ; k < port->mSamplingRates.size() ; k++) {
6516        const uint32_t rate = port->mSamplingRates.itemAt(k);
6517        if (rate != 0) { // skip "dynamic" rates
6518            bool hasRate = false;
6519            for (size_t l = 0 ; l < mSamplingRates.size() ; l++) {
6520                if (rate == mSamplingRates.itemAt(l)) {
6521                    hasRate = true;
6522                    break;
6523                }
6524            }
6525            if (!hasRate) { // never import a sampling rate twice
6526                mSamplingRates.add(rate);
6527            }
6528        }
6529    }
6530    for (size_t k = 0 ; k < port->mChannelMasks.size() ; k++) {
6531        const audio_channel_mask_t mask = port->mChannelMasks.itemAt(k);
6532        if (mask != 0) { // skip "dynamic" masks
6533            bool hasMask = false;
6534            for (size_t l = 0 ; l < mChannelMasks.size() ; l++) {
6535                if (mask == mChannelMasks.itemAt(l)) {
6536                    hasMask = true;
6537                    break;
6538                }
6539            }
6540            if (!hasMask) { // never import a channel mask twice
6541                mChannelMasks.add(mask);
6542            }
6543        }
6544    }
6545    for (size_t k = 0 ; k < port->mFormats.size() ; k++) {
6546        const audio_format_t format = port->mFormats.itemAt(k);
6547        if (format != 0) { // skip "dynamic" formats
6548            bool hasFormat = false;
6549            for (size_t l = 0 ; l < mFormats.size() ; l++) {
6550                if (format == mFormats.itemAt(l)) {
6551                    hasFormat = true;
6552                    break;
6553                }
6554            }
6555            if (!hasFormat) { // never import a channel mask twice
6556                mFormats.add(format);
6557            }
6558        }
6559    }
6560    for (size_t k = 0 ; k < port->mGains.size() ; k++) {
6561        sp<AudioGain> gain = port->mGains.itemAt(k);
6562        if (gain != 0) {
6563            bool hasGain = false;
6564            for (size_t l = 0 ; l < mGains.size() ; l++) {
6565                if (gain == mGains.itemAt(l)) {
6566                    hasGain = true;
6567                    break;
6568                }
6569            }
6570            if (!hasGain) { // never import a gain twice
6571                mGains.add(gain);
6572            }
6573        }
6574    }
6575}
6576
6577void AudioPolicyManager::AudioPort::clearCapabilities() {
6578    mChannelMasks.clear();
6579    mFormats.clear();
6580    mSamplingRates.clear();
6581    mGains.clear();
6582}
6583
6584void AudioPolicyManager::AudioPort::loadSamplingRates(char *name)
6585{
6586    char *str = strtok(name, "|");
6587
6588    // by convention, "0' in the first entry in mSamplingRates indicates the supported sampling
6589    // rates should be read from the output stream after it is opened for the first time
6590    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
6591        mSamplingRates.add(0);
6592        return;
6593    }
6594
6595    while (str != NULL) {
6596        uint32_t rate = atoi(str);
6597        if (rate != 0) {
6598            ALOGV("loadSamplingRates() adding rate %d", rate);
6599            mSamplingRates.add(rate);
6600        }
6601        str = strtok(NULL, "|");
6602    }
6603}
6604
6605void AudioPolicyManager::AudioPort::loadFormats(char *name)
6606{
6607    char *str = strtok(name, "|");
6608
6609    // by convention, "0' in the first entry in mFormats indicates the supported formats
6610    // should be read from the output stream after it is opened for the first time
6611    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
6612        mFormats.add(AUDIO_FORMAT_DEFAULT);
6613        return;
6614    }
6615
6616    while (str != NULL) {
6617        audio_format_t format = (audio_format_t)stringToEnum(sFormatNameToEnumTable,
6618                                                             ARRAY_SIZE(sFormatNameToEnumTable),
6619                                                             str);
6620        if (format != AUDIO_FORMAT_DEFAULT) {
6621            mFormats.add(format);
6622        }
6623        str = strtok(NULL, "|");
6624    }
6625}
6626
6627void AudioPolicyManager::AudioPort::loadInChannels(char *name)
6628{
6629    const char *str = strtok(name, "|");
6630
6631    ALOGV("loadInChannels() %s", name);
6632
6633    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
6634        mChannelMasks.add(0);
6635        return;
6636    }
6637
6638    while (str != NULL) {
6639        audio_channel_mask_t channelMask =
6640                (audio_channel_mask_t)stringToEnum(sInChannelsNameToEnumTable,
6641                                                   ARRAY_SIZE(sInChannelsNameToEnumTable),
6642                                                   str);
6643        if (channelMask != 0) {
6644            ALOGV("loadInChannels() adding channelMask %04x", channelMask);
6645            mChannelMasks.add(channelMask);
6646        }
6647        str = strtok(NULL, "|");
6648    }
6649}
6650
6651void AudioPolicyManager::AudioPort::loadOutChannels(char *name)
6652{
6653    const char *str = strtok(name, "|");
6654
6655    ALOGV("loadOutChannels() %s", name);
6656
6657    // by convention, "0' in the first entry in mChannelMasks indicates the supported channel
6658    // masks should be read from the output stream after it is opened for the first time
6659    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
6660        mChannelMasks.add(0);
6661        return;
6662    }
6663
6664    while (str != NULL) {
6665        audio_channel_mask_t channelMask =
6666                (audio_channel_mask_t)stringToEnum(sOutChannelsNameToEnumTable,
6667                                                   ARRAY_SIZE(sOutChannelsNameToEnumTable),
6668                                                   str);
6669        if (channelMask != 0) {
6670            mChannelMasks.add(channelMask);
6671        }
6672        str = strtok(NULL, "|");
6673    }
6674    return;
6675}
6676
6677audio_gain_mode_t AudioPolicyManager::AudioPort::loadGainMode(char *name)
6678{
6679    const char *str = strtok(name, "|");
6680
6681    ALOGV("loadGainMode() %s", name);
6682    audio_gain_mode_t mode = 0;
6683    while (str != NULL) {
6684        mode |= (audio_gain_mode_t)stringToEnum(sGainModeNameToEnumTable,
6685                                                ARRAY_SIZE(sGainModeNameToEnumTable),
6686                                                str);
6687        str = strtok(NULL, "|");
6688    }
6689    return mode;
6690}
6691
6692void AudioPolicyManager::AudioPort::loadGain(cnode *root, int index)
6693{
6694    cnode *node = root->first_child;
6695
6696    sp<AudioGain> gain = new AudioGain(index, mUseInChannelMask);
6697
6698    while (node) {
6699        if (strcmp(node->name, GAIN_MODE) == 0) {
6700            gain->mGain.mode = loadGainMode((char *)node->value);
6701        } else if (strcmp(node->name, GAIN_CHANNELS) == 0) {
6702            if (mUseInChannelMask) {
6703                gain->mGain.channel_mask =
6704                        (audio_channel_mask_t)stringToEnum(sInChannelsNameToEnumTable,
6705                                                           ARRAY_SIZE(sInChannelsNameToEnumTable),
6706                                                           (char *)node->value);
6707            } else {
6708                gain->mGain.channel_mask =
6709                        (audio_channel_mask_t)stringToEnum(sOutChannelsNameToEnumTable,
6710                                                           ARRAY_SIZE(sOutChannelsNameToEnumTable),
6711                                                           (char *)node->value);
6712            }
6713        } else if (strcmp(node->name, GAIN_MIN_VALUE) == 0) {
6714            gain->mGain.min_value = atoi((char *)node->value);
6715        } else if (strcmp(node->name, GAIN_MAX_VALUE) == 0) {
6716            gain->mGain.max_value = atoi((char *)node->value);
6717        } else if (strcmp(node->name, GAIN_DEFAULT_VALUE) == 0) {
6718            gain->mGain.default_value = atoi((char *)node->value);
6719        } else if (strcmp(node->name, GAIN_STEP_VALUE) == 0) {
6720            gain->mGain.step_value = atoi((char *)node->value);
6721        } else if (strcmp(node->name, GAIN_MIN_RAMP_MS) == 0) {
6722            gain->mGain.min_ramp_ms = atoi((char *)node->value);
6723        } else if (strcmp(node->name, GAIN_MAX_RAMP_MS) == 0) {
6724            gain->mGain.max_ramp_ms = atoi((char *)node->value);
6725        }
6726        node = node->next;
6727    }
6728
6729    ALOGV("loadGain() adding new gain mode %08x channel mask %08x min mB %d max mB %d",
6730          gain->mGain.mode, gain->mGain.channel_mask, gain->mGain.min_value, gain->mGain.max_value);
6731
6732    if (gain->mGain.mode == 0) {
6733        return;
6734    }
6735    mGains.add(gain);
6736}
6737
6738void AudioPolicyManager::AudioPort::loadGains(cnode *root)
6739{
6740    cnode *node = root->first_child;
6741    int index = 0;
6742    while (node) {
6743        ALOGV("loadGains() loading gain %s", node->name);
6744        loadGain(node, index++);
6745        node = node->next;
6746    }
6747}
6748
6749status_t AudioPolicyManager::AudioPort::checkExactSamplingRate(uint32_t samplingRate) const
6750{
6751    if (mSamplingRates.isEmpty()) {
6752        return NO_ERROR;
6753    }
6754
6755    for (size_t i = 0; i < mSamplingRates.size(); i ++) {
6756        if (mSamplingRates[i] == samplingRate) {
6757            return NO_ERROR;
6758        }
6759    }
6760    return BAD_VALUE;
6761}
6762
6763status_t AudioPolicyManager::AudioPort::checkCompatibleSamplingRate(uint32_t samplingRate,
6764        uint32_t *updatedSamplingRate) const
6765{
6766    if (mSamplingRates.isEmpty()) {
6767        return NO_ERROR;
6768    }
6769
6770    // Search for the closest supported sampling rate that is above (preferred)
6771    // or below (acceptable) the desired sampling rate, within a permitted ratio.
6772    // The sampling rates do not need to be sorted in ascending order.
6773    ssize_t maxBelow = -1;
6774    ssize_t minAbove = -1;
6775    uint32_t candidate;
6776    for (size_t i = 0; i < mSamplingRates.size(); i++) {
6777        candidate = mSamplingRates[i];
6778        if (candidate == samplingRate) {
6779            if (updatedSamplingRate != NULL) {
6780                *updatedSamplingRate = candidate;
6781            }
6782            return NO_ERROR;
6783        }
6784        // candidate < desired
6785        if (candidate < samplingRate) {
6786            if (maxBelow < 0 || candidate > mSamplingRates[maxBelow]) {
6787                maxBelow = i;
6788            }
6789        // candidate > desired
6790        } else {
6791            if (minAbove < 0 || candidate < mSamplingRates[minAbove]) {
6792                minAbove = i;
6793            }
6794        }
6795    }
6796    // This uses hard-coded knowledge about AudioFlinger resampling ratios.
6797    // TODO Move these assumptions out.
6798    static const uint32_t kMaxDownSampleRatio = 6;  // beyond this aliasing occurs
6799    static const uint32_t kMaxUpSampleRatio = 256;  // beyond this sample rate inaccuracies occur
6800                                                    // due to approximation by an int32_t of the
6801                                                    // phase increments
6802    // Prefer to down-sample from a higher sampling rate, as we get the desired frequency spectrum.
6803    if (minAbove >= 0) {
6804        candidate = mSamplingRates[minAbove];
6805        if (candidate / kMaxDownSampleRatio <= samplingRate) {
6806            if (updatedSamplingRate != NULL) {
6807                *updatedSamplingRate = candidate;
6808            }
6809            return NO_ERROR;
6810        }
6811    }
6812    // But if we have to up-sample from a lower sampling rate, that's OK.
6813    if (maxBelow >= 0) {
6814        candidate = mSamplingRates[maxBelow];
6815        if (candidate * kMaxUpSampleRatio >= samplingRate) {
6816            if (updatedSamplingRate != NULL) {
6817                *updatedSamplingRate = candidate;
6818            }
6819            return NO_ERROR;
6820        }
6821    }
6822    // leave updatedSamplingRate unmodified
6823    return BAD_VALUE;
6824}
6825
6826status_t AudioPolicyManager::AudioPort::checkExactChannelMask(audio_channel_mask_t channelMask) const
6827{
6828    if (mChannelMasks.isEmpty()) {
6829        return NO_ERROR;
6830    }
6831
6832    for (size_t i = 0; i < mChannelMasks.size(); i++) {
6833        if (mChannelMasks[i] == channelMask) {
6834            return NO_ERROR;
6835        }
6836    }
6837    return BAD_VALUE;
6838}
6839
6840status_t AudioPolicyManager::AudioPort::checkCompatibleChannelMask(audio_channel_mask_t channelMask)
6841        const
6842{
6843    if (mChannelMasks.isEmpty()) {
6844        return NO_ERROR;
6845    }
6846
6847    const bool isRecordThread = mType == AUDIO_PORT_TYPE_MIX && mRole == AUDIO_PORT_ROLE_SINK;
6848    for (size_t i = 0; i < mChannelMasks.size(); i ++) {
6849        // FIXME Does not handle multi-channel automatic conversions yet
6850        audio_channel_mask_t supported = mChannelMasks[i];
6851        if (supported == channelMask) {
6852            return NO_ERROR;
6853        }
6854        if (isRecordThread) {
6855            // This uses hard-coded knowledge that AudioFlinger can silently down-mix and up-mix.
6856            // FIXME Abstract this out to a table.
6857            if (((supported == AUDIO_CHANNEL_IN_FRONT_BACK || supported == AUDIO_CHANNEL_IN_STEREO)
6858                    && channelMask == AUDIO_CHANNEL_IN_MONO) ||
6859                (supported == AUDIO_CHANNEL_IN_MONO && (channelMask == AUDIO_CHANNEL_IN_FRONT_BACK
6860                    || channelMask == AUDIO_CHANNEL_IN_STEREO))) {
6861                return NO_ERROR;
6862            }
6863        }
6864    }
6865    return BAD_VALUE;
6866}
6867
6868status_t AudioPolicyManager::AudioPort::checkFormat(audio_format_t format) const
6869{
6870    if (mFormats.isEmpty()) {
6871        return NO_ERROR;
6872    }
6873
6874    for (size_t i = 0; i < mFormats.size(); i ++) {
6875        if (mFormats[i] == format) {
6876            return NO_ERROR;
6877        }
6878    }
6879    return BAD_VALUE;
6880}
6881
6882
6883uint32_t AudioPolicyManager::AudioPort::pickSamplingRate() const
6884{
6885    // special case for uninitialized dynamic profile
6886    if (mSamplingRates.size() == 1 && mSamplingRates[0] == 0) {
6887        return 0;
6888    }
6889
6890    // For direct outputs, pick minimum sampling rate: this helps ensuring that the
6891    // channel count / sampling rate combination chosen will be supported by the connected
6892    // sink
6893    if ((mType == AUDIO_PORT_TYPE_MIX) && (mRole == AUDIO_PORT_ROLE_SOURCE) &&
6894            (mFlags & (AUDIO_OUTPUT_FLAG_DIRECT | AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD))) {
6895        uint32_t samplingRate = UINT_MAX;
6896        for (size_t i = 0; i < mSamplingRates.size(); i ++) {
6897            if ((mSamplingRates[i] < samplingRate) && (mSamplingRates[i] > 0)) {
6898                samplingRate = mSamplingRates[i];
6899            }
6900        }
6901        return (samplingRate == UINT_MAX) ? 0 : samplingRate;
6902    }
6903
6904    uint32_t samplingRate = 0;
6905    uint32_t maxRate = MAX_MIXER_SAMPLING_RATE;
6906
6907    // For mixed output and inputs, use max mixer sampling rates. Do not
6908    // limit sampling rate otherwise
6909    if (mType != AUDIO_PORT_TYPE_MIX) {
6910        maxRate = UINT_MAX;
6911    }
6912    for (size_t i = 0; i < mSamplingRates.size(); i ++) {
6913        if ((mSamplingRates[i] > samplingRate) && (mSamplingRates[i] <= maxRate)) {
6914            samplingRate = mSamplingRates[i];
6915        }
6916    }
6917    return samplingRate;
6918}
6919
6920audio_channel_mask_t AudioPolicyManager::AudioPort::pickChannelMask() const
6921{
6922    // special case for uninitialized dynamic profile
6923    if (mChannelMasks.size() == 1 && mChannelMasks[0] == 0) {
6924        return AUDIO_CHANNEL_NONE;
6925    }
6926    audio_channel_mask_t channelMask = AUDIO_CHANNEL_NONE;
6927
6928    // For direct outputs, pick minimum channel count: this helps ensuring that the
6929    // channel count / sampling rate combination chosen will be supported by the connected
6930    // sink
6931    if ((mType == AUDIO_PORT_TYPE_MIX) && (mRole == AUDIO_PORT_ROLE_SOURCE) &&
6932            (mFlags & (AUDIO_OUTPUT_FLAG_DIRECT | AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD))) {
6933        uint32_t channelCount = UINT_MAX;
6934        for (size_t i = 0; i < mChannelMasks.size(); i ++) {
6935            uint32_t cnlCount;
6936            if (mUseInChannelMask) {
6937                cnlCount = audio_channel_count_from_in_mask(mChannelMasks[i]);
6938            } else {
6939                cnlCount = audio_channel_count_from_out_mask(mChannelMasks[i]);
6940            }
6941            if ((cnlCount < channelCount) && (cnlCount > 0)) {
6942                channelMask = mChannelMasks[i];
6943                channelCount = cnlCount;
6944            }
6945        }
6946        return channelMask;
6947    }
6948
6949    uint32_t channelCount = 0;
6950    uint32_t maxCount = MAX_MIXER_CHANNEL_COUNT;
6951
6952    // For mixed output and inputs, use max mixer channel count. Do not
6953    // limit channel count otherwise
6954    if (mType != AUDIO_PORT_TYPE_MIX) {
6955        maxCount = UINT_MAX;
6956    }
6957    for (size_t i = 0; i < mChannelMasks.size(); i ++) {
6958        uint32_t cnlCount;
6959        if (mUseInChannelMask) {
6960            cnlCount = audio_channel_count_from_in_mask(mChannelMasks[i]);
6961        } else {
6962            cnlCount = audio_channel_count_from_out_mask(mChannelMasks[i]);
6963        }
6964        if ((cnlCount > channelCount) && (cnlCount <= maxCount)) {
6965            channelMask = mChannelMasks[i];
6966            channelCount = cnlCount;
6967        }
6968    }
6969    return channelMask;
6970}
6971
6972/* format in order of increasing preference */
6973const audio_format_t AudioPolicyManager::AudioPort::sPcmFormatCompareTable[] = {
6974        AUDIO_FORMAT_DEFAULT,
6975        AUDIO_FORMAT_PCM_16_BIT,
6976        AUDIO_FORMAT_PCM_8_24_BIT,
6977        AUDIO_FORMAT_PCM_24_BIT_PACKED,
6978        AUDIO_FORMAT_PCM_32_BIT,
6979        AUDIO_FORMAT_PCM_FLOAT,
6980};
6981
6982int AudioPolicyManager::AudioPort::compareFormats(audio_format_t format1,
6983                                                  audio_format_t format2)
6984{
6985    // NOTE: AUDIO_FORMAT_INVALID is also considered not PCM and will be compared equal to any
6986    // compressed format and better than any PCM format. This is by design of pickFormat()
6987    if (!audio_is_linear_pcm(format1)) {
6988        if (!audio_is_linear_pcm(format2)) {
6989            return 0;
6990        }
6991        return 1;
6992    }
6993    if (!audio_is_linear_pcm(format2)) {
6994        return -1;
6995    }
6996
6997    int index1 = -1, index2 = -1;
6998    for (size_t i = 0;
6999            (i < ARRAY_SIZE(sPcmFormatCompareTable)) && ((index1 == -1) || (index2 == -1));
7000            i ++) {
7001        if (sPcmFormatCompareTable[i] == format1) {
7002            index1 = i;
7003        }
7004        if (sPcmFormatCompareTable[i] == format2) {
7005            index2 = i;
7006        }
7007    }
7008    // format1 not found => index1 < 0 => format2 > format1
7009    // format2 not found => index2 < 0 => format2 < format1
7010    return index1 - index2;
7011}
7012
7013audio_format_t AudioPolicyManager::AudioPort::pickFormat() const
7014{
7015    // special case for uninitialized dynamic profile
7016    if (mFormats.size() == 1 && mFormats[0] == 0) {
7017        return AUDIO_FORMAT_DEFAULT;
7018    }
7019
7020    audio_format_t format = AUDIO_FORMAT_DEFAULT;
7021    audio_format_t bestFormat =
7022            AudioPolicyManager::AudioPort::sPcmFormatCompareTable[
7023                ARRAY_SIZE(AudioPolicyManager::AudioPort::sPcmFormatCompareTable) - 1];
7024    // For mixed output and inputs, use best mixer output format. Do not
7025    // limit format otherwise
7026    if ((mType != AUDIO_PORT_TYPE_MIX) ||
7027            ((mRole == AUDIO_PORT_ROLE_SOURCE) &&
7028             (((mFlags & (AUDIO_OUTPUT_FLAG_DIRECT | AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD)) != 0)))) {
7029        bestFormat = AUDIO_FORMAT_INVALID;
7030    }
7031
7032    for (size_t i = 0; i < mFormats.size(); i ++) {
7033        if ((compareFormats(mFormats[i], format) > 0) &&
7034                (compareFormats(mFormats[i], bestFormat) <= 0)) {
7035            format = mFormats[i];
7036        }
7037    }
7038    return format;
7039}
7040
7041status_t AudioPolicyManager::AudioPort::checkGain(const struct audio_gain_config *gainConfig,
7042                                                  int index) const
7043{
7044    if (index < 0 || (size_t)index >= mGains.size()) {
7045        return BAD_VALUE;
7046    }
7047    return mGains[index]->checkConfig(gainConfig);
7048}
7049
7050void AudioPolicyManager::AudioPort::dump(int fd, int spaces) const
7051{
7052    const size_t SIZE = 256;
7053    char buffer[SIZE];
7054    String8 result;
7055
7056    if (mName.size() != 0) {
7057        snprintf(buffer, SIZE, "%*s- name: %s\n", spaces, "", mName.string());
7058        result.append(buffer);
7059    }
7060
7061    if (mSamplingRates.size() != 0) {
7062        snprintf(buffer, SIZE, "%*s- sampling rates: ", spaces, "");
7063        result.append(buffer);
7064        for (size_t i = 0; i < mSamplingRates.size(); i++) {
7065            if (i == 0 && mSamplingRates[i] == 0) {
7066                snprintf(buffer, SIZE, "Dynamic");
7067            } else {
7068                snprintf(buffer, SIZE, "%d", mSamplingRates[i]);
7069            }
7070            result.append(buffer);
7071            result.append(i == (mSamplingRates.size() - 1) ? "" : ", ");
7072        }
7073        result.append("\n");
7074    }
7075
7076    if (mChannelMasks.size() != 0) {
7077        snprintf(buffer, SIZE, "%*s- channel masks: ", spaces, "");
7078        result.append(buffer);
7079        for (size_t i = 0; i < mChannelMasks.size(); i++) {
7080            ALOGV("AudioPort::dump mChannelMasks %zu %08x", i, mChannelMasks[i]);
7081
7082            if (i == 0 && mChannelMasks[i] == 0) {
7083                snprintf(buffer, SIZE, "Dynamic");
7084            } else {
7085                snprintf(buffer, SIZE, "0x%04x", mChannelMasks[i]);
7086            }
7087            result.append(buffer);
7088            result.append(i == (mChannelMasks.size() - 1) ? "" : ", ");
7089        }
7090        result.append("\n");
7091    }
7092
7093    if (mFormats.size() != 0) {
7094        snprintf(buffer, SIZE, "%*s- formats: ", spaces, "");
7095        result.append(buffer);
7096        for (size_t i = 0; i < mFormats.size(); i++) {
7097            const char *formatStr = enumToString(sFormatNameToEnumTable,
7098                                                 ARRAY_SIZE(sFormatNameToEnumTable),
7099                                                 mFormats[i]);
7100            if (i == 0 && strcmp(formatStr, "") == 0) {
7101                snprintf(buffer, SIZE, "Dynamic");
7102            } else {
7103                snprintf(buffer, SIZE, "%s", formatStr);
7104            }
7105            result.append(buffer);
7106            result.append(i == (mFormats.size() - 1) ? "" : ", ");
7107        }
7108        result.append("\n");
7109    }
7110    write(fd, result.string(), result.size());
7111    if (mGains.size() != 0) {
7112        snprintf(buffer, SIZE, "%*s- gains:\n", spaces, "");
7113        write(fd, buffer, strlen(buffer) + 1);
7114        result.append(buffer);
7115        for (size_t i = 0; i < mGains.size(); i++) {
7116            mGains[i]->dump(fd, spaces + 2, i);
7117        }
7118    }
7119}
7120
7121// --- AudioGain class implementation
7122
7123AudioPolicyManager::AudioGain::AudioGain(int index, bool useInChannelMask)
7124{
7125    mIndex = index;
7126    mUseInChannelMask = useInChannelMask;
7127    memset(&mGain, 0, sizeof(struct audio_gain));
7128}
7129
7130void AudioPolicyManager::AudioGain::getDefaultConfig(struct audio_gain_config *config)
7131{
7132    config->index = mIndex;
7133    config->mode = mGain.mode;
7134    config->channel_mask = mGain.channel_mask;
7135    if ((mGain.mode & AUDIO_GAIN_MODE_JOINT) == AUDIO_GAIN_MODE_JOINT) {
7136        config->values[0] = mGain.default_value;
7137    } else {
7138        uint32_t numValues;
7139        if (mUseInChannelMask) {
7140            numValues = audio_channel_count_from_in_mask(mGain.channel_mask);
7141        } else {
7142            numValues = audio_channel_count_from_out_mask(mGain.channel_mask);
7143        }
7144        for (size_t i = 0; i < numValues; i++) {
7145            config->values[i] = mGain.default_value;
7146        }
7147    }
7148    if ((mGain.mode & AUDIO_GAIN_MODE_RAMP) == AUDIO_GAIN_MODE_RAMP) {
7149        config->ramp_duration_ms = mGain.min_ramp_ms;
7150    }
7151}
7152
7153status_t AudioPolicyManager::AudioGain::checkConfig(const struct audio_gain_config *config)
7154{
7155    if ((config->mode & ~mGain.mode) != 0) {
7156        return BAD_VALUE;
7157    }
7158    if ((config->mode & AUDIO_GAIN_MODE_JOINT) == AUDIO_GAIN_MODE_JOINT) {
7159        if ((config->values[0] < mGain.min_value) ||
7160                    (config->values[0] > mGain.max_value)) {
7161            return BAD_VALUE;
7162        }
7163    } else {
7164        if ((config->channel_mask & ~mGain.channel_mask) != 0) {
7165            return BAD_VALUE;
7166        }
7167        uint32_t numValues;
7168        if (mUseInChannelMask) {
7169            numValues = audio_channel_count_from_in_mask(config->channel_mask);
7170        } else {
7171            numValues = audio_channel_count_from_out_mask(config->channel_mask);
7172        }
7173        for (size_t i = 0; i < numValues; i++) {
7174            if ((config->values[i] < mGain.min_value) ||
7175                    (config->values[i] > mGain.max_value)) {
7176                return BAD_VALUE;
7177            }
7178        }
7179    }
7180    if ((config->mode & AUDIO_GAIN_MODE_RAMP) == AUDIO_GAIN_MODE_RAMP) {
7181        if ((config->ramp_duration_ms < mGain.min_ramp_ms) ||
7182                    (config->ramp_duration_ms > mGain.max_ramp_ms)) {
7183            return BAD_VALUE;
7184        }
7185    }
7186    return NO_ERROR;
7187}
7188
7189void AudioPolicyManager::AudioGain::dump(int fd, int spaces, int index) const
7190{
7191    const size_t SIZE = 256;
7192    char buffer[SIZE];
7193    String8 result;
7194
7195    snprintf(buffer, SIZE, "%*sGain %d:\n", spaces, "", index+1);
7196    result.append(buffer);
7197    snprintf(buffer, SIZE, "%*s- mode: %08x\n", spaces, "", mGain.mode);
7198    result.append(buffer);
7199    snprintf(buffer, SIZE, "%*s- channel_mask: %08x\n", spaces, "", mGain.channel_mask);
7200    result.append(buffer);
7201    snprintf(buffer, SIZE, "%*s- min_value: %d mB\n", spaces, "", mGain.min_value);
7202    result.append(buffer);
7203    snprintf(buffer, SIZE, "%*s- max_value: %d mB\n", spaces, "", mGain.max_value);
7204    result.append(buffer);
7205    snprintf(buffer, SIZE, "%*s- default_value: %d mB\n", spaces, "", mGain.default_value);
7206    result.append(buffer);
7207    snprintf(buffer, SIZE, "%*s- step_value: %d mB\n", spaces, "", mGain.step_value);
7208    result.append(buffer);
7209    snprintf(buffer, SIZE, "%*s- min_ramp_ms: %d ms\n", spaces, "", mGain.min_ramp_ms);
7210    result.append(buffer);
7211    snprintf(buffer, SIZE, "%*s- max_ramp_ms: %d ms\n", spaces, "", mGain.max_ramp_ms);
7212    result.append(buffer);
7213
7214    write(fd, result.string(), result.size());
7215}
7216
7217// --- AudioPortConfig class implementation
7218
7219AudioPolicyManager::AudioPortConfig::AudioPortConfig()
7220{
7221    mSamplingRate = 0;
7222    mChannelMask = AUDIO_CHANNEL_NONE;
7223    mFormat = AUDIO_FORMAT_INVALID;
7224    mGain.index = -1;
7225}
7226
7227status_t AudioPolicyManager::AudioPortConfig::applyAudioPortConfig(
7228                                                        const struct audio_port_config *config,
7229                                                        struct audio_port_config *backupConfig)
7230{
7231    struct audio_port_config localBackupConfig;
7232    status_t status = NO_ERROR;
7233
7234    localBackupConfig.config_mask = config->config_mask;
7235    toAudioPortConfig(&localBackupConfig);
7236
7237    sp<AudioPort> audioport = getAudioPort();
7238    if (audioport == 0) {
7239        status = NO_INIT;
7240        goto exit;
7241    }
7242    if (config->config_mask & AUDIO_PORT_CONFIG_SAMPLE_RATE) {
7243        status = audioport->checkExactSamplingRate(config->sample_rate);
7244        if (status != NO_ERROR) {
7245            goto exit;
7246        }
7247        mSamplingRate = config->sample_rate;
7248    }
7249    if (config->config_mask & AUDIO_PORT_CONFIG_CHANNEL_MASK) {
7250        status = audioport->checkExactChannelMask(config->channel_mask);
7251        if (status != NO_ERROR) {
7252            goto exit;
7253        }
7254        mChannelMask = config->channel_mask;
7255    }
7256    if (config->config_mask & AUDIO_PORT_CONFIG_FORMAT) {
7257        status = audioport->checkFormat(config->format);
7258        if (status != NO_ERROR) {
7259            goto exit;
7260        }
7261        mFormat = config->format;
7262    }
7263    if (config->config_mask & AUDIO_PORT_CONFIG_GAIN) {
7264        status = audioport->checkGain(&config->gain, config->gain.index);
7265        if (status != NO_ERROR) {
7266            goto exit;
7267        }
7268        mGain = config->gain;
7269    }
7270
7271exit:
7272    if (status != NO_ERROR) {
7273        applyAudioPortConfig(&localBackupConfig);
7274    }
7275    if (backupConfig != NULL) {
7276        *backupConfig = localBackupConfig;
7277    }
7278    return status;
7279}
7280
7281void AudioPolicyManager::AudioPortConfig::toAudioPortConfig(
7282                                                    struct audio_port_config *dstConfig,
7283                                                    const struct audio_port_config *srcConfig) const
7284{
7285    if (dstConfig->config_mask & AUDIO_PORT_CONFIG_SAMPLE_RATE) {
7286        dstConfig->sample_rate = mSamplingRate;
7287        if ((srcConfig != NULL) && (srcConfig->config_mask & AUDIO_PORT_CONFIG_SAMPLE_RATE)) {
7288            dstConfig->sample_rate = srcConfig->sample_rate;
7289        }
7290    } else {
7291        dstConfig->sample_rate = 0;
7292    }
7293    if (dstConfig->config_mask & AUDIO_PORT_CONFIG_CHANNEL_MASK) {
7294        dstConfig->channel_mask = mChannelMask;
7295        if ((srcConfig != NULL) && (srcConfig->config_mask & AUDIO_PORT_CONFIG_CHANNEL_MASK)) {
7296            dstConfig->channel_mask = srcConfig->channel_mask;
7297        }
7298    } else {
7299        dstConfig->channel_mask = AUDIO_CHANNEL_NONE;
7300    }
7301    if (dstConfig->config_mask & AUDIO_PORT_CONFIG_FORMAT) {
7302        dstConfig->format = mFormat;
7303        if ((srcConfig != NULL) && (srcConfig->config_mask & AUDIO_PORT_CONFIG_FORMAT)) {
7304            dstConfig->format = srcConfig->format;
7305        }
7306    } else {
7307        dstConfig->format = AUDIO_FORMAT_INVALID;
7308    }
7309    if (dstConfig->config_mask & AUDIO_PORT_CONFIG_GAIN) {
7310        dstConfig->gain = mGain;
7311        if ((srcConfig != NULL) && (srcConfig->config_mask & AUDIO_PORT_CONFIG_GAIN)) {
7312            dstConfig->gain = srcConfig->gain;
7313        }
7314    } else {
7315        dstConfig->gain.index = -1;
7316    }
7317    if (dstConfig->gain.index != -1) {
7318        dstConfig->config_mask |= AUDIO_PORT_CONFIG_GAIN;
7319    } else {
7320        dstConfig->config_mask &= ~AUDIO_PORT_CONFIG_GAIN;
7321    }
7322}
7323
7324// --- IOProfile class implementation
7325
7326AudioPolicyManager::IOProfile::IOProfile(const String8& name, audio_port_role_t role,
7327                                         const sp<HwModule>& module)
7328    : AudioPort(name, AUDIO_PORT_TYPE_MIX, role, module)
7329{
7330}
7331
7332AudioPolicyManager::IOProfile::~IOProfile()
7333{
7334}
7335
7336// checks if the IO profile is compatible with specified parameters.
7337// Sampling rate, format and channel mask must be specified in order to
7338// get a valid a match
7339bool AudioPolicyManager::IOProfile::isCompatibleProfile(audio_devices_t device,
7340                                                        String8 address,
7341                                                        uint32_t samplingRate,
7342                                                        uint32_t *updatedSamplingRate,
7343                                                        audio_format_t format,
7344                                                        audio_channel_mask_t channelMask,
7345                                                        uint32_t flags) const
7346{
7347    const bool isPlaybackThread = mType == AUDIO_PORT_TYPE_MIX && mRole == AUDIO_PORT_ROLE_SOURCE;
7348    const bool isRecordThread = mType == AUDIO_PORT_TYPE_MIX && mRole == AUDIO_PORT_ROLE_SINK;
7349    ALOG_ASSERT(isPlaybackThread != isRecordThread);
7350
7351    if (device != AUDIO_DEVICE_NONE && mSupportedDevices.getDevice(device, address) == 0) {
7352        return false;
7353    }
7354
7355    if (samplingRate == 0) {
7356         return false;
7357    }
7358    uint32_t myUpdatedSamplingRate = samplingRate;
7359    if (isPlaybackThread && checkExactSamplingRate(samplingRate) != NO_ERROR) {
7360         return false;
7361    }
7362    if (isRecordThread && checkCompatibleSamplingRate(samplingRate, &myUpdatedSamplingRate) !=
7363            NO_ERROR) {
7364         return false;
7365    }
7366
7367    if (!audio_is_valid_format(format) || checkFormat(format) != NO_ERROR) {
7368        return false;
7369    }
7370
7371    if (isPlaybackThread && (!audio_is_output_channel(channelMask) ||
7372            checkExactChannelMask(channelMask) != NO_ERROR)) {
7373        return false;
7374    }
7375    if (isRecordThread && (!audio_is_input_channel(channelMask) ||
7376            checkCompatibleChannelMask(channelMask) != NO_ERROR)) {
7377        return false;
7378    }
7379
7380    if (isPlaybackThread && (mFlags & flags) != flags) {
7381        return false;
7382    }
7383    // The only input flag that is allowed to be different is the fast flag.
7384    // An existing fast stream is compatible with a normal track request.
7385    // An existing normal stream is compatible with a fast track request,
7386    // but the fast request will be denied by AudioFlinger and converted to normal track.
7387    if (isRecordThread && ((mFlags ^ flags) &
7388            ~AUDIO_INPUT_FLAG_FAST)) {
7389        return false;
7390    }
7391
7392    if (updatedSamplingRate != NULL) {
7393        *updatedSamplingRate = myUpdatedSamplingRate;
7394    }
7395    return true;
7396}
7397
7398void AudioPolicyManager::IOProfile::dump(int fd)
7399{
7400    const size_t SIZE = 256;
7401    char buffer[SIZE];
7402    String8 result;
7403
7404    AudioPort::dump(fd, 4);
7405
7406    snprintf(buffer, SIZE, "    - flags: 0x%04x\n", mFlags);
7407    result.append(buffer);
7408    snprintf(buffer, SIZE, "    - devices:\n");
7409    result.append(buffer);
7410    write(fd, result.string(), result.size());
7411    for (size_t i = 0; i < mSupportedDevices.size(); i++) {
7412        mSupportedDevices[i]->dump(fd, 6, i);
7413    }
7414}
7415
7416void AudioPolicyManager::IOProfile::log()
7417{
7418    const size_t SIZE = 256;
7419    char buffer[SIZE];
7420    String8 result;
7421
7422    ALOGV("    - sampling rates: ");
7423    for (size_t i = 0; i < mSamplingRates.size(); i++) {
7424        ALOGV("  %d", mSamplingRates[i]);
7425    }
7426
7427    ALOGV("    - channel masks: ");
7428    for (size_t i = 0; i < mChannelMasks.size(); i++) {
7429        ALOGV("  0x%04x", mChannelMasks[i]);
7430    }
7431
7432    ALOGV("    - formats: ");
7433    for (size_t i = 0; i < mFormats.size(); i++) {
7434        ALOGV("  0x%08x", mFormats[i]);
7435    }
7436
7437    ALOGV("    - devices: 0x%04x\n", mSupportedDevices.types());
7438    ALOGV("    - flags: 0x%04x\n", mFlags);
7439}
7440
7441
7442// --- DeviceDescriptor implementation
7443
7444
7445AudioPolicyManager::DeviceDescriptor::DeviceDescriptor(const String8& name, audio_devices_t type) :
7446                     AudioPort(name, AUDIO_PORT_TYPE_DEVICE,
7447                               audio_is_output_device(type) ? AUDIO_PORT_ROLE_SINK :
7448                                                              AUDIO_PORT_ROLE_SOURCE,
7449                             NULL),
7450                     mDeviceType(type), mAddress(""), mId(0)
7451{
7452    if (mGains.size() > 0) {
7453        mGains[0]->getDefaultConfig(&mGain);
7454    }
7455}
7456
7457bool AudioPolicyManager::DeviceDescriptor::equals(const sp<DeviceDescriptor>& other) const
7458{
7459    // Devices are considered equal if they:
7460    // - are of the same type (a device type cannot be AUDIO_DEVICE_NONE)
7461    // - have the same address or one device does not specify the address
7462    // - have the same channel mask or one device does not specify the channel mask
7463    return (mDeviceType == other->mDeviceType) &&
7464           (mAddress == "" || other->mAddress == "" || mAddress == other->mAddress) &&
7465           (mChannelMask == 0 || other->mChannelMask == 0 ||
7466                mChannelMask == other->mChannelMask);
7467}
7468
7469void AudioPolicyManager::DeviceVector::refreshTypes()
7470{
7471    mDeviceTypes = AUDIO_DEVICE_NONE;
7472    for(size_t i = 0; i < size(); i++) {
7473        mDeviceTypes |= itemAt(i)->mDeviceType;
7474    }
7475    ALOGV("DeviceVector::refreshTypes() mDeviceTypes %08x", mDeviceTypes);
7476}
7477
7478ssize_t AudioPolicyManager::DeviceVector::indexOf(const sp<DeviceDescriptor>& item) const
7479{
7480    for(size_t i = 0; i < size(); i++) {
7481        if (item->equals(itemAt(i))) {
7482            return i;
7483        }
7484    }
7485    return -1;
7486}
7487
7488ssize_t AudioPolicyManager::DeviceVector::add(const sp<DeviceDescriptor>& item)
7489{
7490    ssize_t ret = indexOf(item);
7491
7492    if (ret < 0) {
7493        ret = SortedVector::add(item);
7494        if (ret >= 0) {
7495            refreshTypes();
7496        }
7497    } else {
7498        ALOGW("DeviceVector::add device %08x already in", item->mDeviceType);
7499        ret = -1;
7500    }
7501    return ret;
7502}
7503
7504ssize_t AudioPolicyManager::DeviceVector::remove(const sp<DeviceDescriptor>& item)
7505{
7506    size_t i;
7507    ssize_t ret = indexOf(item);
7508
7509    if (ret < 0) {
7510        ALOGW("DeviceVector::remove device %08x not in", item->mDeviceType);
7511    } else {
7512        ret = SortedVector::removeAt(ret);
7513        if (ret >= 0) {
7514            refreshTypes();
7515        }
7516    }
7517    return ret;
7518}
7519
7520void AudioPolicyManager::DeviceVector::loadDevicesFromType(audio_devices_t types)
7521{
7522    DeviceVector deviceList;
7523
7524    uint32_t role_bit = AUDIO_DEVICE_BIT_IN & types;
7525    types &= ~role_bit;
7526
7527    while (types) {
7528        uint32_t i = 31 - __builtin_clz(types);
7529        uint32_t type = 1 << i;
7530        types &= ~type;
7531        add(new DeviceDescriptor(String8(""), type | role_bit));
7532    }
7533}
7534
7535void AudioPolicyManager::DeviceVector::loadDevicesFromName(char *name,
7536                                                           const DeviceVector& declaredDevices)
7537{
7538    char *devName = strtok(name, "|");
7539    while (devName != NULL) {
7540        if (strlen(devName) != 0) {
7541            audio_devices_t type = stringToEnum(sDeviceNameToEnumTable,
7542                                 ARRAY_SIZE(sDeviceNameToEnumTable),
7543                                 devName);
7544            if (type != AUDIO_DEVICE_NONE) {
7545                sp<DeviceDescriptor> dev = new DeviceDescriptor(String8(""), type);
7546                if (type == AUDIO_DEVICE_IN_REMOTE_SUBMIX ||
7547                        type == AUDIO_DEVICE_OUT_REMOTE_SUBMIX ) {
7548                    dev->mAddress = String8("0");
7549                }
7550                add(dev);
7551            } else {
7552                sp<DeviceDescriptor> deviceDesc =
7553                        declaredDevices.getDeviceFromName(String8(devName));
7554                if (deviceDesc != 0) {
7555                    add(deviceDesc);
7556                }
7557            }
7558         }
7559         devName = strtok(NULL, "|");
7560     }
7561}
7562
7563sp<AudioPolicyManager::DeviceDescriptor> AudioPolicyManager::DeviceVector::getDevice(
7564                                                        audio_devices_t type, String8 address) const
7565{
7566    sp<DeviceDescriptor> device;
7567    for (size_t i = 0; i < size(); i++) {
7568        if (itemAt(i)->mDeviceType == type) {
7569            if (address == "" || itemAt(i)->mAddress == address) {
7570                device = itemAt(i);
7571                if (itemAt(i)->mAddress == address) {
7572                    break;
7573                }
7574            }
7575        }
7576    }
7577    ALOGV("DeviceVector::getDevice() for type %08x address %s found %p",
7578          type, address.string(), device.get());
7579    return device;
7580}
7581
7582sp<AudioPolicyManager::DeviceDescriptor> AudioPolicyManager::DeviceVector::getDeviceFromId(
7583                                                                    audio_port_handle_t id) const
7584{
7585    sp<DeviceDescriptor> device;
7586    for (size_t i = 0; i < size(); i++) {
7587        ALOGV("DeviceVector::getDeviceFromId(%d) itemAt(%zu)->mId %d", id, i, itemAt(i)->mId);
7588        if (itemAt(i)->mId == id) {
7589            device = itemAt(i);
7590            break;
7591        }
7592    }
7593    return device;
7594}
7595
7596AudioPolicyManager::DeviceVector AudioPolicyManager::DeviceVector::getDevicesFromType(
7597                                                                        audio_devices_t type) const
7598{
7599    DeviceVector devices;
7600    for (size_t i = 0; (i < size()) && (type != AUDIO_DEVICE_NONE); i++) {
7601        if (itemAt(i)->mDeviceType & type & ~AUDIO_DEVICE_BIT_IN) {
7602            devices.add(itemAt(i));
7603            type &= ~itemAt(i)->mDeviceType;
7604            ALOGV("DeviceVector::getDevicesFromType() for type %x found %p",
7605                  itemAt(i)->mDeviceType, itemAt(i).get());
7606        }
7607    }
7608    return devices;
7609}
7610
7611AudioPolicyManager::DeviceVector AudioPolicyManager::DeviceVector::getDevicesFromTypeAddr(
7612        audio_devices_t type, String8 address) const
7613{
7614    DeviceVector devices;
7615    for (size_t i = 0; i < size(); i++) {
7616        if (itemAt(i)->mDeviceType == type) {
7617            if (itemAt(i)->mAddress == address) {
7618                devices.add(itemAt(i));
7619            }
7620        }
7621    }
7622    return devices;
7623}
7624
7625sp<AudioPolicyManager::DeviceDescriptor> AudioPolicyManager::DeviceVector::getDeviceFromName(
7626        const String8& name) const
7627{
7628    sp<DeviceDescriptor> device;
7629    for (size_t i = 0; i < size(); i++) {
7630        if (itemAt(i)->mName == name) {
7631            device = itemAt(i);
7632            break;
7633        }
7634    }
7635    return device;
7636}
7637
7638void AudioPolicyManager::DeviceDescriptor::toAudioPortConfig(
7639                                                    struct audio_port_config *dstConfig,
7640                                                    const struct audio_port_config *srcConfig) const
7641{
7642    dstConfig->config_mask = AUDIO_PORT_CONFIG_CHANNEL_MASK|AUDIO_PORT_CONFIG_GAIN;
7643    if (srcConfig != NULL) {
7644        dstConfig->config_mask |= srcConfig->config_mask;
7645    }
7646
7647    AudioPortConfig::toAudioPortConfig(dstConfig, srcConfig);
7648
7649    dstConfig->id = mId;
7650    dstConfig->role = audio_is_output_device(mDeviceType) ?
7651                        AUDIO_PORT_ROLE_SINK : AUDIO_PORT_ROLE_SOURCE;
7652    dstConfig->type = AUDIO_PORT_TYPE_DEVICE;
7653    dstConfig->ext.device.type = mDeviceType;
7654    dstConfig->ext.device.hw_module = mModule->mHandle;
7655    strncpy(dstConfig->ext.device.address, mAddress.string(), AUDIO_DEVICE_MAX_ADDRESS_LEN);
7656}
7657
7658void AudioPolicyManager::DeviceDescriptor::toAudioPort(struct audio_port *port) const
7659{
7660    ALOGV("DeviceDescriptor::toAudioPort() handle %d type %x", mId, mDeviceType);
7661    AudioPort::toAudioPort(port);
7662    port->id = mId;
7663    toAudioPortConfig(&port->active_config);
7664    port->ext.device.type = mDeviceType;
7665    port->ext.device.hw_module = mModule->mHandle;
7666    strncpy(port->ext.device.address, mAddress.string(), AUDIO_DEVICE_MAX_ADDRESS_LEN);
7667}
7668
7669status_t AudioPolicyManager::DeviceDescriptor::dump(int fd, int spaces, int index) const
7670{
7671    const size_t SIZE = 256;
7672    char buffer[SIZE];
7673    String8 result;
7674
7675    snprintf(buffer, SIZE, "%*sDevice %d:\n", spaces, "", index+1);
7676    result.append(buffer);
7677    if (mId != 0) {
7678        snprintf(buffer, SIZE, "%*s- id: %2d\n", spaces, "", mId);
7679        result.append(buffer);
7680    }
7681    snprintf(buffer, SIZE, "%*s- type: %-48s\n", spaces, "",
7682                                              enumToString(sDeviceNameToEnumTable,
7683                                                           ARRAY_SIZE(sDeviceNameToEnumTable),
7684                                                           mDeviceType));
7685    result.append(buffer);
7686    if (mAddress.size() != 0) {
7687        snprintf(buffer, SIZE, "%*s- address: %-32s\n", spaces, "", mAddress.string());
7688        result.append(buffer);
7689    }
7690    write(fd, result.string(), result.size());
7691    AudioPort::dump(fd, spaces);
7692
7693    return NO_ERROR;
7694}
7695
7696status_t AudioPolicyManager::AudioPatch::dump(int fd, int spaces, int index) const
7697{
7698    const size_t SIZE = 256;
7699    char buffer[SIZE];
7700    String8 result;
7701
7702
7703    snprintf(buffer, SIZE, "%*sAudio patch %d:\n", spaces, "", index+1);
7704    result.append(buffer);
7705    snprintf(buffer, SIZE, "%*s- handle: %2d\n", spaces, "", mHandle);
7706    result.append(buffer);
7707    snprintf(buffer, SIZE, "%*s- audio flinger handle: %2d\n", spaces, "", mAfPatchHandle);
7708    result.append(buffer);
7709    snprintf(buffer, SIZE, "%*s- owner uid: %2d\n", spaces, "", mUid);
7710    result.append(buffer);
7711    snprintf(buffer, SIZE, "%*s- %d sources:\n", spaces, "", mPatch.num_sources);
7712    result.append(buffer);
7713    for (size_t i = 0; i < mPatch.num_sources; i++) {
7714        if (mPatch.sources[i].type == AUDIO_PORT_TYPE_DEVICE) {
7715            snprintf(buffer, SIZE, "%*s- Device ID %d %s\n", spaces + 2, "",
7716                     mPatch.sources[i].id, enumToString(sDeviceNameToEnumTable,
7717                                                        ARRAY_SIZE(sDeviceNameToEnumTable),
7718                                                        mPatch.sources[i].ext.device.type));
7719        } else {
7720            snprintf(buffer, SIZE, "%*s- Mix ID %d I/O handle %d\n", spaces + 2, "",
7721                     mPatch.sources[i].id, mPatch.sources[i].ext.mix.handle);
7722        }
7723        result.append(buffer);
7724    }
7725    snprintf(buffer, SIZE, "%*s- %d sinks:\n", spaces, "", mPatch.num_sinks);
7726    result.append(buffer);
7727    for (size_t i = 0; i < mPatch.num_sinks; i++) {
7728        if (mPatch.sinks[i].type == AUDIO_PORT_TYPE_DEVICE) {
7729            snprintf(buffer, SIZE, "%*s- Device ID %d %s\n", spaces + 2, "",
7730                     mPatch.sinks[i].id, enumToString(sDeviceNameToEnumTable,
7731                                                        ARRAY_SIZE(sDeviceNameToEnumTable),
7732                                                        mPatch.sinks[i].ext.device.type));
7733        } else {
7734            snprintf(buffer, SIZE, "%*s- Mix ID %d I/O handle %d\n", spaces + 2, "",
7735                     mPatch.sinks[i].id, mPatch.sinks[i].ext.mix.handle);
7736        }
7737        result.append(buffer);
7738    }
7739
7740    write(fd, result.string(), result.size());
7741    return NO_ERROR;
7742}
7743
7744// --- audio_policy.conf file parsing
7745
7746uint32_t AudioPolicyManager::parseOutputFlagNames(char *name)
7747{
7748    uint32_t flag = 0;
7749
7750    // it is OK to cast name to non const here as we are not going to use it after
7751    // strtok() modifies it
7752    char *flagName = strtok(name, "|");
7753    while (flagName != NULL) {
7754        if (strlen(flagName) != 0) {
7755            flag |= stringToEnum(sOutputFlagNameToEnumTable,
7756                               ARRAY_SIZE(sOutputFlagNameToEnumTable),
7757                               flagName);
7758        }
7759        flagName = strtok(NULL, "|");
7760    }
7761    //force direct flag if offload flag is set: offloading implies a direct output stream
7762    // and all common behaviors are driven by checking only the direct flag
7763    // this should normally be set appropriately in the policy configuration file
7764    if ((flag & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0) {
7765        flag |= AUDIO_OUTPUT_FLAG_DIRECT;
7766    }
7767
7768    return flag;
7769}
7770
7771uint32_t AudioPolicyManager::parseInputFlagNames(char *name)
7772{
7773    uint32_t flag = 0;
7774
7775    // it is OK to cast name to non const here as we are not going to use it after
7776    // strtok() modifies it
7777    char *flagName = strtok(name, "|");
7778    while (flagName != NULL) {
7779        if (strlen(flagName) != 0) {
7780            flag |= stringToEnum(sInputFlagNameToEnumTable,
7781                               ARRAY_SIZE(sInputFlagNameToEnumTable),
7782                               flagName);
7783        }
7784        flagName = strtok(NULL, "|");
7785    }
7786    return flag;
7787}
7788
7789audio_devices_t AudioPolicyManager::parseDeviceNames(char *name)
7790{
7791    uint32_t device = 0;
7792
7793    char *devName = strtok(name, "|");
7794    while (devName != NULL) {
7795        if (strlen(devName) != 0) {
7796            device |= stringToEnum(sDeviceNameToEnumTable,
7797                                 ARRAY_SIZE(sDeviceNameToEnumTable),
7798                                 devName);
7799         }
7800        devName = strtok(NULL, "|");
7801     }
7802    return device;
7803}
7804
7805void AudioPolicyManager::loadHwModule(cnode *root)
7806{
7807    status_t status = NAME_NOT_FOUND;
7808    cnode *node;
7809    sp<HwModule> module = new HwModule(root->name);
7810
7811    node = config_find(root, DEVICES_TAG);
7812    if (node != NULL) {
7813        node = node->first_child;
7814        while (node) {
7815            ALOGV("loadHwModule() loading device %s", node->name);
7816            status_t tmpStatus = module->loadDevice(node);
7817            if (status == NAME_NOT_FOUND || status == NO_ERROR) {
7818                status = tmpStatus;
7819            }
7820            node = node->next;
7821        }
7822    }
7823    node = config_find(root, OUTPUTS_TAG);
7824    if (node != NULL) {
7825        node = node->first_child;
7826        while (node) {
7827            ALOGV("loadHwModule() loading output %s", node->name);
7828            status_t tmpStatus = module->loadOutput(node);
7829            if (status == NAME_NOT_FOUND || status == NO_ERROR) {
7830                status = tmpStatus;
7831            }
7832            node = node->next;
7833        }
7834    }
7835    node = config_find(root, INPUTS_TAG);
7836    if (node != NULL) {
7837        node = node->first_child;
7838        while (node) {
7839            ALOGV("loadHwModule() loading input %s", node->name);
7840            status_t tmpStatus = module->loadInput(node);
7841            if (status == NAME_NOT_FOUND || status == NO_ERROR) {
7842                status = tmpStatus;
7843            }
7844            node = node->next;
7845        }
7846    }
7847    loadGlobalConfig(root, module);
7848
7849    if (status == NO_ERROR) {
7850        mHwModules.add(module);
7851    }
7852}
7853
7854void AudioPolicyManager::loadHwModules(cnode *root)
7855{
7856    cnode *node = config_find(root, AUDIO_HW_MODULE_TAG);
7857    if (node == NULL) {
7858        return;
7859    }
7860
7861    node = node->first_child;
7862    while (node) {
7863        ALOGV("loadHwModules() loading module %s", node->name);
7864        loadHwModule(node);
7865        node = node->next;
7866    }
7867}
7868
7869void AudioPolicyManager::loadGlobalConfig(cnode *root, const sp<HwModule>& module)
7870{
7871    cnode *node = config_find(root, GLOBAL_CONFIG_TAG);
7872
7873    if (node == NULL) {
7874        return;
7875    }
7876    DeviceVector declaredDevices;
7877    if (module != NULL) {
7878        declaredDevices = module->mDeclaredDevices;
7879    }
7880
7881    node = node->first_child;
7882    while (node) {
7883        if (strcmp(ATTACHED_OUTPUT_DEVICES_TAG, node->name) == 0) {
7884            mAvailableOutputDevices.loadDevicesFromName((char *)node->value,
7885                                                        declaredDevices);
7886            ALOGV("loadGlobalConfig() Attached Output Devices %08x",
7887                  mAvailableOutputDevices.types());
7888        } else if (strcmp(DEFAULT_OUTPUT_DEVICE_TAG, node->name) == 0) {
7889            audio_devices_t device = (audio_devices_t)stringToEnum(sDeviceNameToEnumTable,
7890                                              ARRAY_SIZE(sDeviceNameToEnumTable),
7891                                              (char *)node->value);
7892            if (device != AUDIO_DEVICE_NONE) {
7893                mDefaultOutputDevice = new DeviceDescriptor(String8(""), device);
7894            } else {
7895                ALOGW("loadGlobalConfig() default device not specified");
7896            }
7897            ALOGV("loadGlobalConfig() mDefaultOutputDevice %08x", mDefaultOutputDevice->mDeviceType);
7898        } else if (strcmp(ATTACHED_INPUT_DEVICES_TAG, node->name) == 0) {
7899            mAvailableInputDevices.loadDevicesFromName((char *)node->value,
7900                                                       declaredDevices);
7901            ALOGV("loadGlobalConfig() Available InputDevices %08x", mAvailableInputDevices.types());
7902        } else if (strcmp(SPEAKER_DRC_ENABLED_TAG, node->name) == 0) {
7903            mSpeakerDrcEnabled = stringToBool((char *)node->value);
7904            ALOGV("loadGlobalConfig() mSpeakerDrcEnabled = %d", mSpeakerDrcEnabled);
7905        } else if (strcmp(AUDIO_HAL_VERSION_TAG, node->name) == 0) {
7906            uint32_t major, minor;
7907            sscanf((char *)node->value, "%u.%u", &major, &minor);
7908            module->mHalVersion = HARDWARE_DEVICE_API_VERSION(major, minor);
7909            ALOGV("loadGlobalConfig() mHalVersion = %04x major %u minor %u",
7910                  module->mHalVersion, major, minor);
7911        }
7912        node = node->next;
7913    }
7914}
7915
7916status_t AudioPolicyManager::loadAudioPolicyConfig(const char *path)
7917{
7918    cnode *root;
7919    char *data;
7920
7921    data = (char *)load_file(path, NULL);
7922    if (data == NULL) {
7923        return -ENODEV;
7924    }
7925    root = config_node("", "");
7926    config_load(root, data);
7927
7928    loadHwModules(root);
7929    // legacy audio_policy.conf files have one global_configuration section
7930    loadGlobalConfig(root, getModuleFromName(AUDIO_HARDWARE_MODULE_ID_PRIMARY));
7931    config_free(root);
7932    free(root);
7933    free(data);
7934
7935    ALOGI("loadAudioPolicyConfig() loaded %s\n", path);
7936
7937    return NO_ERROR;
7938}
7939
7940void AudioPolicyManager::defaultAudioPolicyConfig(void)
7941{
7942    sp<HwModule> module;
7943    sp<IOProfile> profile;
7944    sp<DeviceDescriptor> defaultInputDevice = new DeviceDescriptor(String8(""),
7945                                                                   AUDIO_DEVICE_IN_BUILTIN_MIC);
7946    mAvailableOutputDevices.add(mDefaultOutputDevice);
7947    mAvailableInputDevices.add(defaultInputDevice);
7948
7949    module = new HwModule("primary");
7950
7951    profile = new IOProfile(String8("primary"), AUDIO_PORT_ROLE_SOURCE, module);
7952    profile->mSamplingRates.add(44100);
7953    profile->mFormats.add(AUDIO_FORMAT_PCM_16_BIT);
7954    profile->mChannelMasks.add(AUDIO_CHANNEL_OUT_STEREO);
7955    profile->mSupportedDevices.add(mDefaultOutputDevice);
7956    profile->mFlags = AUDIO_OUTPUT_FLAG_PRIMARY;
7957    module->mOutputProfiles.add(profile);
7958
7959    profile = new IOProfile(String8("primary"), AUDIO_PORT_ROLE_SINK, module);
7960    profile->mSamplingRates.add(8000);
7961    profile->mFormats.add(AUDIO_FORMAT_PCM_16_BIT);
7962    profile->mChannelMasks.add(AUDIO_CHANNEL_IN_MONO);
7963    profile->mSupportedDevices.add(defaultInputDevice);
7964    module->mInputProfiles.add(profile);
7965
7966    mHwModules.add(module);
7967}
7968
7969audio_stream_type_t AudioPolicyManager::streamTypefromAttributesInt(const audio_attributes_t *attr)
7970{
7971    // flags to stream type mapping
7972    if ((attr->flags & AUDIO_FLAG_AUDIBILITY_ENFORCED) == AUDIO_FLAG_AUDIBILITY_ENFORCED) {
7973        return AUDIO_STREAM_ENFORCED_AUDIBLE;
7974    }
7975    if ((attr->flags & AUDIO_FLAG_SCO) == AUDIO_FLAG_SCO) {
7976        return AUDIO_STREAM_BLUETOOTH_SCO;
7977    }
7978    if ((attr->flags & AUDIO_FLAG_BEACON) == AUDIO_FLAG_BEACON) {
7979        return AUDIO_STREAM_TTS;
7980    }
7981
7982    // usage to stream type mapping
7983    switch (attr->usage) {
7984    case AUDIO_USAGE_MEDIA:
7985    case AUDIO_USAGE_GAME:
7986    case AUDIO_USAGE_ASSISTANCE_NAVIGATION_GUIDANCE:
7987        return AUDIO_STREAM_MUSIC;
7988    case AUDIO_USAGE_ASSISTANCE_ACCESSIBILITY:
7989        if (isStreamActive(AUDIO_STREAM_ALARM)) {
7990            return AUDIO_STREAM_ALARM;
7991        }
7992        if (isStreamActive(AUDIO_STREAM_RING)) {
7993            return AUDIO_STREAM_RING;
7994        }
7995        if (isInCall()) {
7996            return AUDIO_STREAM_VOICE_CALL;
7997        }
7998        return AUDIO_STREAM_ACCESSIBILITY;
7999    case AUDIO_USAGE_ASSISTANCE_SONIFICATION:
8000        return AUDIO_STREAM_SYSTEM;
8001    case AUDIO_USAGE_VOICE_COMMUNICATION:
8002        return AUDIO_STREAM_VOICE_CALL;
8003
8004    case AUDIO_USAGE_VOICE_COMMUNICATION_SIGNALLING:
8005        return AUDIO_STREAM_DTMF;
8006
8007    case AUDIO_USAGE_ALARM:
8008        return AUDIO_STREAM_ALARM;
8009    case AUDIO_USAGE_NOTIFICATION_TELEPHONY_RINGTONE:
8010        return AUDIO_STREAM_RING;
8011
8012    case AUDIO_USAGE_NOTIFICATION:
8013    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_REQUEST:
8014    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_INSTANT:
8015    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_DELAYED:
8016    case AUDIO_USAGE_NOTIFICATION_EVENT:
8017        return AUDIO_STREAM_NOTIFICATION;
8018
8019    case AUDIO_USAGE_UNKNOWN:
8020    default:
8021        return AUDIO_STREAM_MUSIC;
8022    }
8023}
8024
8025bool AudioPolicyManager::isValidAttributes(const audio_attributes_t *paa) {
8026    // has flags that map to a strategy?
8027    if ((paa->flags & (AUDIO_FLAG_AUDIBILITY_ENFORCED | AUDIO_FLAG_SCO | AUDIO_FLAG_BEACON)) != 0) {
8028        return true;
8029    }
8030
8031    // has known usage?
8032    switch (paa->usage) {
8033    case AUDIO_USAGE_UNKNOWN:
8034    case AUDIO_USAGE_MEDIA:
8035    case AUDIO_USAGE_VOICE_COMMUNICATION:
8036    case AUDIO_USAGE_VOICE_COMMUNICATION_SIGNALLING:
8037    case AUDIO_USAGE_ALARM:
8038    case AUDIO_USAGE_NOTIFICATION:
8039    case AUDIO_USAGE_NOTIFICATION_TELEPHONY_RINGTONE:
8040    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_REQUEST:
8041    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_INSTANT:
8042    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_DELAYED:
8043    case AUDIO_USAGE_NOTIFICATION_EVENT:
8044    case AUDIO_USAGE_ASSISTANCE_ACCESSIBILITY:
8045    case AUDIO_USAGE_ASSISTANCE_NAVIGATION_GUIDANCE:
8046    case AUDIO_USAGE_ASSISTANCE_SONIFICATION:
8047    case AUDIO_USAGE_GAME:
8048    case AUDIO_USAGE_VIRTUAL_SOURCE:
8049        break;
8050    default:
8051        return false;
8052    }
8053    return true;
8054}
8055
8056}; // namespace android
8057