AudioPolicyManager.cpp revision 2cbe89a82d4167c5d5bcf3024edc22ab6874143a 
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 halInputSource = attr->source;
1444    AudioMix *policyMix = NULL;
1445
1446    if (attr->source == AUDIO_SOURCE_REMOTE_SUBMIX &&
1447            strncmp(attr->tags, "addr=", strlen("addr=")) == 0) {
1448        device = AUDIO_DEVICE_IN_REMOTE_SUBMIX;
1449        address = String8(attr->tags + strlen("addr="));
1450        ssize_t index = mPolicyMixes.indexOfKey(address);
1451        if (index < 0) {
1452            ALOGW("getInputForAttr() no policy for address %s", address.string());
1453            return BAD_VALUE;
1454        }
1455        if (mPolicyMixes[index]->mMix.mMixType != MIX_TYPE_PLAYERS) {
1456            ALOGW("getInputForAttr() bad policy mix type for address %s", address.string());
1457            return BAD_VALUE;
1458        }
1459        policyMix = &mPolicyMixes[index]->mMix;
1460        *inputType = API_INPUT_MIX_EXT_POLICY_REROUTE;
1461    } else {
1462        device = getDeviceAndMixForInputSource(attr->source, &policyMix);
1463        if (device == AUDIO_DEVICE_NONE) {
1464            ALOGW("getInputForAttr() could not find device for source %d", attr->source);
1465            return BAD_VALUE;
1466        }
1467        if (policyMix != NULL) {
1468            address = policyMix->mRegistrationId;
1469            if (policyMix->mMixType == MIX_TYPE_RECORDERS) {
1470                // there is an external policy, but this input is attached to a mix of recorders,
1471                // meaning it receives audio injected into the framework, so the recorder doesn't
1472                // know about it and is therefore considered "legacy"
1473                *inputType = API_INPUT_LEGACY;
1474            } else {
1475                // recording a mix of players defined by an external policy, we're rerouting for
1476                // an external policy
1477                *inputType = API_INPUT_MIX_EXT_POLICY_REROUTE;
1478            }
1479        } else if (audio_is_remote_submix_device(device)) {
1480            address = String8("0");
1481            *inputType = API_INPUT_MIX_CAPTURE;
1482        } else {
1483            *inputType = API_INPUT_LEGACY;
1484        }
1485        // adapt channel selection to input source
1486        switch (attr->source) {
1487        case AUDIO_SOURCE_VOICE_UPLINK:
1488            channelMask = AUDIO_CHANNEL_IN_VOICE_UPLINK;
1489            break;
1490        case AUDIO_SOURCE_VOICE_DOWNLINK:
1491            channelMask = AUDIO_CHANNEL_IN_VOICE_DNLINK;
1492            break;
1493        case AUDIO_SOURCE_VOICE_CALL:
1494            channelMask = AUDIO_CHANNEL_IN_VOICE_UPLINK | AUDIO_CHANNEL_IN_VOICE_DNLINK;
1495            break;
1496        default:
1497            break;
1498        }
1499        if (attr->source == AUDIO_SOURCE_HOTWORD) {
1500            ssize_t index = mSoundTriggerSessions.indexOfKey(session);
1501            if (index >= 0) {
1502                *input = mSoundTriggerSessions.valueFor(session);
1503                isSoundTrigger = true;
1504                flags = (audio_input_flags_t)(flags | AUDIO_INPUT_FLAG_HW_HOTWORD);
1505                ALOGV("SoundTrigger capture on session %d input %d", session, *input);
1506            } else {
1507                halInputSource = AUDIO_SOURCE_VOICE_RECOGNITION;
1508            }
1509        }
1510    }
1511
1512    sp<IOProfile> profile = getInputProfile(device, address,
1513                                            samplingRate, format, channelMask,
1514                                            flags);
1515    if (profile == 0) {
1516        //retry without flags
1517        audio_input_flags_t log_flags = flags;
1518        flags = AUDIO_INPUT_FLAG_NONE;
1519        profile = getInputProfile(device, address,
1520                                  samplingRate, format, channelMask,
1521                                  flags);
1522        if (profile == 0) {
1523            ALOGW("getInputForAttr() could not find profile for device 0x%X, samplingRate %u,"
1524                    "format %#x, channelMask 0x%X, flags %#x",
1525                    device, samplingRate, format, channelMask, log_flags);
1526            return BAD_VALUE;
1527        }
1528    }
1529
1530    if (profile->mModule->mHandle == 0) {
1531        ALOGE("getInputForAttr(): HW module %s not opened", profile->mModule->mName);
1532        return NO_INIT;
1533    }
1534
1535    audio_config_t config = AUDIO_CONFIG_INITIALIZER;
1536    config.sample_rate = samplingRate;
1537    config.channel_mask = channelMask;
1538    config.format = format;
1539
1540    status_t status = mpClientInterface->openInput(profile->mModule->mHandle,
1541                                                   input,
1542                                                   &config,
1543                                                   &device,
1544                                                   address,
1545                                                   halInputSource,
1546                                                   flags);
1547
1548    // only accept input with the exact requested set of parameters
1549    if (status != NO_ERROR || *input == AUDIO_IO_HANDLE_NONE ||
1550        (samplingRate != config.sample_rate) ||
1551        (format != config.format) ||
1552        (channelMask != config.channel_mask)) {
1553        ALOGW("getInputForAttr() failed opening input: samplingRate %d, format %d, channelMask %x",
1554                samplingRate, format, channelMask);
1555        if (*input != AUDIO_IO_HANDLE_NONE) {
1556            mpClientInterface->closeInput(*input);
1557        }
1558        return BAD_VALUE;
1559    }
1560
1561    sp<AudioInputDescriptor> inputDesc = new AudioInputDescriptor(profile);
1562    inputDesc->mInputSource = attr->source;
1563    inputDesc->mRefCount = 0;
1564    inputDesc->mOpenRefCount = 1;
1565    inputDesc->mSamplingRate = samplingRate;
1566    inputDesc->mFormat = format;
1567    inputDesc->mChannelMask = channelMask;
1568    inputDesc->mDevice = device;
1569    inputDesc->mSessions.add(session);
1570    inputDesc->mIsSoundTrigger = isSoundTrigger;
1571    inputDesc->mPolicyMix = policyMix;
1572
1573    ALOGV("getInputForAttr() returns input type = %d", inputType);
1574
1575    addInput(*input, inputDesc);
1576    mpClientInterface->onAudioPortListUpdate();
1577    return NO_ERROR;
1578}
1579
1580status_t AudioPolicyManager::startInput(audio_io_handle_t input,
1581                                        audio_session_t session)
1582{
1583    ALOGV("startInput() input %d", input);
1584    ssize_t index = mInputs.indexOfKey(input);
1585    if (index < 0) {
1586        ALOGW("startInput() unknown input %d", input);
1587        return BAD_VALUE;
1588    }
1589    sp<AudioInputDescriptor> inputDesc = mInputs.valueAt(index);
1590
1591    index = inputDesc->mSessions.indexOf(session);
1592    if (index < 0) {
1593        ALOGW("startInput() unknown session %d on input %d", session, input);
1594        return BAD_VALUE;
1595    }
1596
1597    // virtual input devices are compatible with other input devices
1598    if (!isVirtualInputDevice(inputDesc->mDevice)) {
1599
1600        // for a non-virtual input device, check if there is another (non-virtual) active input
1601        audio_io_handle_t activeInput = getActiveInput();
1602        if (activeInput != 0 && activeInput != input) {
1603
1604            // If the already active input uses AUDIO_SOURCE_HOTWORD then it is closed,
1605            // otherwise the active input continues and the new input cannot be started.
1606            sp<AudioInputDescriptor> activeDesc = mInputs.valueFor(activeInput);
1607            if (activeDesc->mInputSource == AUDIO_SOURCE_HOTWORD) {
1608                ALOGW("startInput(%d) preempting low-priority input %d", input, activeInput);
1609                stopInput(activeInput, activeDesc->mSessions.itemAt(0));
1610                releaseInput(activeInput, activeDesc->mSessions.itemAt(0));
1611            } else {
1612                ALOGE("startInput(%d) failed: other input %d already started", input, activeInput);
1613                return INVALID_OPERATION;
1614            }
1615        }
1616    }
1617
1618    if (inputDesc->mRefCount == 0) {
1619        if (activeInputsCount() == 0) {
1620            SoundTrigger::setCaptureState(true);
1621        }
1622        setInputDevice(input, getNewInputDevice(input), true /* force */);
1623
1624        // automatically enable the remote submix output when input is started if not
1625        // used by a policy mix of type MIX_TYPE_RECORDERS
1626        // For remote submix (a virtual device), we open only one input per capture request.
1627        if (audio_is_remote_submix_device(inputDesc->mDevice)) {
1628            String8 address = String8("");
1629            if (inputDesc->mPolicyMix == NULL) {
1630                address = String8("0");
1631            } else if (inputDesc->mPolicyMix->mMixType == MIX_TYPE_PLAYERS) {
1632                address = inputDesc->mPolicyMix->mRegistrationId;
1633            }
1634            if (address != "") {
1635                setDeviceConnectionStateInt(AUDIO_DEVICE_OUT_REMOTE_SUBMIX,
1636                        AUDIO_POLICY_DEVICE_STATE_AVAILABLE,
1637                        address);
1638            }
1639        }
1640    }
1641
1642    ALOGV("AudioPolicyManager::startInput() input source = %d", inputDesc->mInputSource);
1643
1644    inputDesc->mRefCount++;
1645    return NO_ERROR;
1646}
1647
1648status_t AudioPolicyManager::stopInput(audio_io_handle_t input,
1649                                       audio_session_t session)
1650{
1651    ALOGV("stopInput() input %d", input);
1652    ssize_t index = mInputs.indexOfKey(input);
1653    if (index < 0) {
1654        ALOGW("stopInput() unknown input %d", input);
1655        return BAD_VALUE;
1656    }
1657    sp<AudioInputDescriptor> inputDesc = mInputs.valueAt(index);
1658
1659    index = inputDesc->mSessions.indexOf(session);
1660    if (index < 0) {
1661        ALOGW("stopInput() unknown session %d on input %d", session, input);
1662        return BAD_VALUE;
1663    }
1664
1665    if (inputDesc->mRefCount == 0) {
1666        ALOGW("stopInput() input %d already stopped", input);
1667        return INVALID_OPERATION;
1668    }
1669
1670    inputDesc->mRefCount--;
1671    if (inputDesc->mRefCount == 0) {
1672
1673        // automatically disable the remote submix output when input is stopped if not
1674        // used by a policy mix of type MIX_TYPE_RECORDERS
1675        if (audio_is_remote_submix_device(inputDesc->mDevice)) {
1676            String8 address = String8("");
1677            if (inputDesc->mPolicyMix == NULL) {
1678                address = String8("0");
1679            } else if (inputDesc->mPolicyMix->mMixType == MIX_TYPE_PLAYERS) {
1680                address = inputDesc->mPolicyMix->mRegistrationId;
1681            }
1682            if (address != "") {
1683                setDeviceConnectionStateInt(AUDIO_DEVICE_OUT_REMOTE_SUBMIX,
1684                                         AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE,
1685                                         address);
1686            }
1687        }
1688
1689        resetInputDevice(input);
1690
1691        if (activeInputsCount() == 0) {
1692            SoundTrigger::setCaptureState(false);
1693        }
1694    }
1695    return NO_ERROR;
1696}
1697
1698void AudioPolicyManager::releaseInput(audio_io_handle_t input,
1699                                      audio_session_t session)
1700{
1701    ALOGV("releaseInput() %d", input);
1702    ssize_t index = mInputs.indexOfKey(input);
1703    if (index < 0) {
1704        ALOGW("releaseInput() releasing unknown input %d", input);
1705        return;
1706    }
1707    sp<AudioInputDescriptor> inputDesc = mInputs.valueAt(index);
1708    ALOG_ASSERT(inputDesc != 0);
1709
1710    index = inputDesc->mSessions.indexOf(session);
1711    if (index < 0) {
1712        ALOGW("releaseInput() unknown session %d on input %d", session, input);
1713        return;
1714    }
1715    inputDesc->mSessions.remove(session);
1716    if (inputDesc->mOpenRefCount == 0) {
1717        ALOGW("releaseInput() invalid open ref count %d", inputDesc->mOpenRefCount);
1718        return;
1719    }
1720    inputDesc->mOpenRefCount--;
1721    if (inputDesc->mOpenRefCount > 0) {
1722        ALOGV("releaseInput() exit > 0");
1723        return;
1724    }
1725
1726    closeInput(input);
1727    mpClientInterface->onAudioPortListUpdate();
1728    ALOGV("releaseInput() exit");
1729}
1730
1731void AudioPolicyManager::closeAllInputs() {
1732    bool patchRemoved = false;
1733
1734    for(size_t input_index = 0; input_index < mInputs.size(); input_index++) {
1735        sp<AudioInputDescriptor> inputDesc = mInputs.valueAt(input_index);
1736        ssize_t patch_index = mAudioPatches.indexOfKey(inputDesc->mPatchHandle);
1737        if (patch_index >= 0) {
1738            sp<AudioPatch> patchDesc = mAudioPatches.valueAt(patch_index);
1739            status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, 0);
1740            mAudioPatches.removeItemsAt(patch_index);
1741            patchRemoved = true;
1742        }
1743        mpClientInterface->closeInput(mInputs.keyAt(input_index));
1744    }
1745    mInputs.clear();
1746    nextAudioPortGeneration();
1747
1748    if (patchRemoved) {
1749        mpClientInterface->onAudioPatchListUpdate();
1750    }
1751}
1752
1753void AudioPolicyManager::initStreamVolume(audio_stream_type_t stream,
1754                                            int indexMin,
1755                                            int indexMax)
1756{
1757    ALOGV("initStreamVolume() stream %d, min %d, max %d", stream , indexMin, indexMax);
1758    if (indexMin < 0 || indexMin >= indexMax) {
1759        ALOGW("initStreamVolume() invalid index limits for stream %d, min %d, max %d", stream , indexMin, indexMax);
1760        return;
1761    }
1762    mStreams[stream].mIndexMin = indexMin;
1763    mStreams[stream].mIndexMax = indexMax;
1764    //FIXME: AUDIO_STREAM_ACCESSIBILITY volume follows AUDIO_STREAM_MUSIC for now
1765    if (stream == AUDIO_STREAM_MUSIC) {
1766        mStreams[AUDIO_STREAM_ACCESSIBILITY].mIndexMin = indexMin;
1767        mStreams[AUDIO_STREAM_ACCESSIBILITY].mIndexMax = indexMax;
1768    }
1769}
1770
1771status_t AudioPolicyManager::setStreamVolumeIndex(audio_stream_type_t stream,
1772                                                      int index,
1773                                                      audio_devices_t device)
1774{
1775
1776    if ((index < mStreams[stream].mIndexMin) || (index > mStreams[stream].mIndexMax)) {
1777        return BAD_VALUE;
1778    }
1779    if (!audio_is_output_device(device)) {
1780        return BAD_VALUE;
1781    }
1782
1783    // Force max volume if stream cannot be muted
1784    if (!mStreams[stream].mCanBeMuted) index = mStreams[stream].mIndexMax;
1785
1786    ALOGV("setStreamVolumeIndex() stream %d, device %04x, index %d",
1787          stream, device, index);
1788
1789    // if device is AUDIO_DEVICE_OUT_DEFAULT set default value and
1790    // clear all device specific values
1791    if (device == AUDIO_DEVICE_OUT_DEFAULT) {
1792        mStreams[stream].mIndexCur.clear();
1793    }
1794    mStreams[stream].mIndexCur.add(device, index);
1795
1796    // update volume on all outputs whose current device is also selected by the same
1797    // strategy as the device specified by the caller
1798    audio_devices_t strategyDevice = getDeviceForStrategy(getStrategy(stream), true /*fromCache*/);
1799
1800
1801    //FIXME: AUDIO_STREAM_ACCESSIBILITY volume follows AUDIO_STREAM_MUSIC for now
1802    audio_devices_t accessibilityDevice = AUDIO_DEVICE_NONE;
1803    if (stream == AUDIO_STREAM_MUSIC) {
1804        mStreams[AUDIO_STREAM_ACCESSIBILITY].mIndexCur.add(device, index);
1805        accessibilityDevice = getDeviceForStrategy(STRATEGY_ACCESSIBILITY, true /*fromCache*/);
1806    }
1807    if ((device != AUDIO_DEVICE_OUT_DEFAULT) &&
1808            (device & (strategyDevice | accessibilityDevice)) == 0) {
1809        return NO_ERROR;
1810    }
1811    status_t status = NO_ERROR;
1812    for (size_t i = 0; i < mOutputs.size(); i++) {
1813        audio_devices_t curDevice =
1814                getDeviceForVolume(mOutputs.valueAt(i)->device());
1815        if ((device == AUDIO_DEVICE_OUT_DEFAULT) || ((curDevice & strategyDevice) != 0)) {
1816            status_t volStatus = checkAndSetVolume(stream, index, mOutputs.keyAt(i), curDevice);
1817            if (volStatus != NO_ERROR) {
1818                status = volStatus;
1819            }
1820        }
1821        if ((device == AUDIO_DEVICE_OUT_DEFAULT) || ((curDevice & accessibilityDevice) != 0)) {
1822            status_t volStatus = checkAndSetVolume(AUDIO_STREAM_ACCESSIBILITY,
1823                                                   index, mOutputs.keyAt(i), curDevice);
1824        }
1825    }
1826    return status;
1827}
1828
1829status_t AudioPolicyManager::getStreamVolumeIndex(audio_stream_type_t stream,
1830                                                      int *index,
1831                                                      audio_devices_t device)
1832{
1833    if (index == NULL) {
1834        return BAD_VALUE;
1835    }
1836    if (!audio_is_output_device(device)) {
1837        return BAD_VALUE;
1838    }
1839    // if device is AUDIO_DEVICE_OUT_DEFAULT, return volume for device corresponding to
1840    // the strategy the stream belongs to.
1841    if (device == AUDIO_DEVICE_OUT_DEFAULT) {
1842        device = getDeviceForStrategy(getStrategy(stream), true /*fromCache*/);
1843    }
1844    device = getDeviceForVolume(device);
1845
1846    *index =  mStreams[stream].getVolumeIndex(device);
1847    ALOGV("getStreamVolumeIndex() stream %d device %08x index %d", stream, device, *index);
1848    return NO_ERROR;
1849}
1850
1851audio_io_handle_t AudioPolicyManager::selectOutputForEffects(
1852                                            const SortedVector<audio_io_handle_t>& outputs)
1853{
1854    // select one output among several suitable for global effects.
1855    // The priority is as follows:
1856    // 1: An offloaded output. If the effect ends up not being offloadable,
1857    //    AudioFlinger will invalidate the track and the offloaded output
1858    //    will be closed causing the effect to be moved to a PCM output.
1859    // 2: A deep buffer output
1860    // 3: the first output in the list
1861
1862    if (outputs.size() == 0) {
1863        return 0;
1864    }
1865
1866    audio_io_handle_t outputOffloaded = 0;
1867    audio_io_handle_t outputDeepBuffer = 0;
1868
1869    for (size_t i = 0; i < outputs.size(); i++) {
1870        sp<AudioOutputDescriptor> desc = mOutputs.valueFor(outputs[i]);
1871        ALOGV("selectOutputForEffects outputs[%zu] flags %x", i, desc->mFlags);
1872        if ((desc->mFlags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0) {
1873            outputOffloaded = outputs[i];
1874        }
1875        if ((desc->mFlags & AUDIO_OUTPUT_FLAG_DEEP_BUFFER) != 0) {
1876            outputDeepBuffer = outputs[i];
1877        }
1878    }
1879
1880    ALOGV("selectOutputForEffects outputOffloaded %d outputDeepBuffer %d",
1881          outputOffloaded, outputDeepBuffer);
1882    if (outputOffloaded != 0) {
1883        return outputOffloaded;
1884    }
1885    if (outputDeepBuffer != 0) {
1886        return outputDeepBuffer;
1887    }
1888
1889    return outputs[0];
1890}
1891
1892audio_io_handle_t AudioPolicyManager::getOutputForEffect(const effect_descriptor_t *desc)
1893{
1894    // apply simple rule where global effects are attached to the same output as MUSIC streams
1895
1896    routing_strategy strategy = getStrategy(AUDIO_STREAM_MUSIC);
1897    audio_devices_t device = getDeviceForStrategy(strategy, false /*fromCache*/);
1898    SortedVector<audio_io_handle_t> dstOutputs = getOutputsForDevice(device, mOutputs);
1899
1900    audio_io_handle_t output = selectOutputForEffects(dstOutputs);
1901    ALOGV("getOutputForEffect() got output %d for fx %s flags %x",
1902          output, (desc == NULL) ? "unspecified" : desc->name,  (desc == NULL) ? 0 : desc->flags);
1903
1904    return output;
1905}
1906
1907status_t AudioPolicyManager::registerEffect(const effect_descriptor_t *desc,
1908                                audio_io_handle_t io,
1909                                uint32_t strategy,
1910                                int session,
1911                                int id)
1912{
1913    ssize_t index = mOutputs.indexOfKey(io);
1914    if (index < 0) {
1915        index = mInputs.indexOfKey(io);
1916        if (index < 0) {
1917            ALOGW("registerEffect() unknown io %d", io);
1918            return INVALID_OPERATION;
1919        }
1920    }
1921
1922    if (mTotalEffectsMemory + desc->memoryUsage > getMaxEffectsMemory()) {
1923        ALOGW("registerEffect() memory limit exceeded for Fx %s, Memory %d KB",
1924                desc->name, desc->memoryUsage);
1925        return INVALID_OPERATION;
1926    }
1927    mTotalEffectsMemory += desc->memoryUsage;
1928    ALOGV("registerEffect() effect %s, io %d, strategy %d session %d id %d",
1929            desc->name, io, strategy, session, id);
1930    ALOGV("registerEffect() memory %d, total memory %d", desc->memoryUsage, mTotalEffectsMemory);
1931
1932    sp<EffectDescriptor> effectDesc = new EffectDescriptor();
1933    memcpy (&effectDesc->mDesc, desc, sizeof(effect_descriptor_t));
1934    effectDesc->mIo = io;
1935    effectDesc->mStrategy = (routing_strategy)strategy;
1936    effectDesc->mSession = session;
1937    effectDesc->mEnabled = false;
1938
1939    mEffects.add(id, effectDesc);
1940
1941    return NO_ERROR;
1942}
1943
1944status_t AudioPolicyManager::unregisterEffect(int id)
1945{
1946    ssize_t index = mEffects.indexOfKey(id);
1947    if (index < 0) {
1948        ALOGW("unregisterEffect() unknown effect ID %d", id);
1949        return INVALID_OPERATION;
1950    }
1951
1952    sp<EffectDescriptor> effectDesc = mEffects.valueAt(index);
1953
1954    setEffectEnabled(effectDesc, false);
1955
1956    if (mTotalEffectsMemory < effectDesc->mDesc.memoryUsage) {
1957        ALOGW("unregisterEffect() memory %d too big for total %d",
1958                effectDesc->mDesc.memoryUsage, mTotalEffectsMemory);
1959        effectDesc->mDesc.memoryUsage = mTotalEffectsMemory;
1960    }
1961    mTotalEffectsMemory -= effectDesc->mDesc.memoryUsage;
1962    ALOGV("unregisterEffect() effect %s, ID %d, memory %d total memory %d",
1963            effectDesc->mDesc.name, id, effectDesc->mDesc.memoryUsage, mTotalEffectsMemory);
1964
1965    mEffects.removeItem(id);
1966
1967    return NO_ERROR;
1968}
1969
1970status_t AudioPolicyManager::setEffectEnabled(int id, bool enabled)
1971{
1972    ssize_t index = mEffects.indexOfKey(id);
1973    if (index < 0) {
1974        ALOGW("unregisterEffect() unknown effect ID %d", id);
1975        return INVALID_OPERATION;
1976    }
1977
1978    return setEffectEnabled(mEffects.valueAt(index), enabled);
1979}
1980
1981status_t AudioPolicyManager::setEffectEnabled(const sp<EffectDescriptor>& effectDesc, bool enabled)
1982{
1983    if (enabled == effectDesc->mEnabled) {
1984        ALOGV("setEffectEnabled(%s) effect already %s",
1985             enabled?"true":"false", enabled?"enabled":"disabled");
1986        return INVALID_OPERATION;
1987    }
1988
1989    if (enabled) {
1990        if (mTotalEffectsCpuLoad + effectDesc->mDesc.cpuLoad > getMaxEffectsCpuLoad()) {
1991            ALOGW("setEffectEnabled(true) CPU Load limit exceeded for Fx %s, CPU %f MIPS",
1992                 effectDesc->mDesc.name, (float)effectDesc->mDesc.cpuLoad/10);
1993            return INVALID_OPERATION;
1994        }
1995        mTotalEffectsCpuLoad += effectDesc->mDesc.cpuLoad;
1996        ALOGV("setEffectEnabled(true) total CPU %d", mTotalEffectsCpuLoad);
1997    } else {
1998        if (mTotalEffectsCpuLoad < effectDesc->mDesc.cpuLoad) {
1999            ALOGW("setEffectEnabled(false) CPU load %d too high for total %d",
2000                    effectDesc->mDesc.cpuLoad, mTotalEffectsCpuLoad);
2001            effectDesc->mDesc.cpuLoad = mTotalEffectsCpuLoad;
2002        }
2003        mTotalEffectsCpuLoad -= effectDesc->mDesc.cpuLoad;
2004        ALOGV("setEffectEnabled(false) total CPU %d", mTotalEffectsCpuLoad);
2005    }
2006    effectDesc->mEnabled = enabled;
2007    return NO_ERROR;
2008}
2009
2010bool AudioPolicyManager::isNonOffloadableEffectEnabled()
2011{
2012    for (size_t i = 0; i < mEffects.size(); i++) {
2013        sp<EffectDescriptor> effectDesc = mEffects.valueAt(i);
2014        if (effectDesc->mEnabled && (effectDesc->mStrategy == STRATEGY_MEDIA) &&
2015                ((effectDesc->mDesc.flags & EFFECT_FLAG_OFFLOAD_SUPPORTED) == 0)) {
2016            ALOGV("isNonOffloadableEffectEnabled() non offloadable effect %s enabled on session %d",
2017                  effectDesc->mDesc.name, effectDesc->mSession);
2018            return true;
2019        }
2020    }
2021    return false;
2022}
2023
2024bool AudioPolicyManager::isStreamActive(audio_stream_type_t stream, uint32_t inPastMs) const
2025{
2026    nsecs_t sysTime = systemTime();
2027    for (size_t i = 0; i < mOutputs.size(); i++) {
2028        const sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(i);
2029        if (outputDesc->isStreamActive(stream, inPastMs, sysTime)) {
2030            return true;
2031        }
2032    }
2033    return false;
2034}
2035
2036bool AudioPolicyManager::isStreamActiveRemotely(audio_stream_type_t stream,
2037                                                    uint32_t inPastMs) const
2038{
2039    nsecs_t sysTime = systemTime();
2040    for (size_t i = 0; i < mOutputs.size(); i++) {
2041        const sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(i);
2042        if (((outputDesc->device() & APM_AUDIO_OUT_DEVICE_REMOTE_ALL) != 0) &&
2043                outputDesc->isStreamActive(stream, inPastMs, sysTime)) {
2044            // do not consider re routing (when the output is going to a dynamic policy)
2045            // as "remote playback"
2046            if (outputDesc->mPolicyMix == NULL) {
2047                return true;
2048            }
2049        }
2050    }
2051    return false;
2052}
2053
2054bool AudioPolicyManager::isSourceActive(audio_source_t source) const
2055{
2056    for (size_t i = 0; i < mInputs.size(); i++) {
2057        const sp<AudioInputDescriptor>  inputDescriptor = mInputs.valueAt(i);
2058        if ((inputDescriptor->mInputSource == (int)source ||
2059                (source == AUDIO_SOURCE_VOICE_RECOGNITION &&
2060                 inputDescriptor->mInputSource == AUDIO_SOURCE_HOTWORD))
2061             && (inputDescriptor->mRefCount > 0)) {
2062            return true;
2063        }
2064    }
2065    return false;
2066}
2067
2068// Register a list of custom mixes with their attributes and format.
2069// When a mix is registered, corresponding input and output profiles are
2070// added to the remote submix hw module. The profile contains only the
2071// parameters (sampling rate, format...) specified by the mix.
2072// The corresponding input remote submix device is also connected.
2073//
2074// When a remote submix device is connected, the address is checked to select the
2075// appropriate profile and the corresponding input or output stream is opened.
2076//
2077// When capture starts, getInputForAttr() will:
2078//  - 1 look for a mix matching the address passed in attribtutes tags if any
2079//  - 2 if none found, getDeviceForInputSource() will:
2080//     - 2.1 look for a mix matching the attributes source
2081//     - 2.2 if none found, default to device selection by policy rules
2082// At this time, the corresponding output remote submix device is also connected
2083// and active playback use cases can be transferred to this mix if needed when reconnecting
2084// after AudioTracks are invalidated
2085//
2086// When playback starts, getOutputForAttr() will:
2087//  - 1 look for a mix matching the address passed in attribtutes tags if any
2088//  - 2 if none found, look for a mix matching the attributes usage
2089//  - 3 if none found, default to device and output selection by policy rules.
2090
2091status_t AudioPolicyManager::registerPolicyMixes(Vector<AudioMix> mixes)
2092{
2093    sp<HwModule> module;
2094    for (size_t i = 0; i < mHwModules.size(); i++) {
2095        if (strcmp(AUDIO_HARDWARE_MODULE_ID_REMOTE_SUBMIX, mHwModules[i]->mName) == 0 &&
2096                mHwModules[i]->mHandle != 0) {
2097            module = mHwModules[i];
2098            break;
2099        }
2100    }
2101
2102    if (module == 0) {
2103        return INVALID_OPERATION;
2104    }
2105
2106    ALOGV("registerPolicyMixes() num mixes %d", mixes.size());
2107
2108    for (size_t i = 0; i < mixes.size(); i++) {
2109        String8 address = mixes[i].mRegistrationId;
2110        ssize_t index = mPolicyMixes.indexOfKey(address);
2111        if (index >= 0) {
2112            ALOGE("registerPolicyMixes(): mix for address %s already registered", address.string());
2113            continue;
2114        }
2115        audio_config_t outputConfig = mixes[i].mFormat;
2116        audio_config_t inputConfig = mixes[i].mFormat;
2117        // NOTE: audio flinger mixer does not support mono output: configure remote submix HAL in
2118        // stereo and let audio flinger do the channel conversion if needed.
2119        outputConfig.channel_mask = AUDIO_CHANNEL_OUT_STEREO;
2120        inputConfig.channel_mask = AUDIO_CHANNEL_IN_STEREO;
2121        module->addOutputProfile(address, &outputConfig,
2122                                 AUDIO_DEVICE_OUT_REMOTE_SUBMIX, address);
2123        module->addInputProfile(address, &inputConfig,
2124                                 AUDIO_DEVICE_IN_REMOTE_SUBMIX, address);
2125        sp<AudioPolicyMix> policyMix = new AudioPolicyMix();
2126        policyMix->mMix = mixes[i];
2127        mPolicyMixes.add(address, policyMix);
2128        if (mixes[i].mMixType == MIX_TYPE_PLAYERS) {
2129            setDeviceConnectionStateInt(AUDIO_DEVICE_IN_REMOTE_SUBMIX,
2130                                     AUDIO_POLICY_DEVICE_STATE_AVAILABLE,
2131                                     address.string());
2132        } else {
2133            setDeviceConnectionStateInt(AUDIO_DEVICE_OUT_REMOTE_SUBMIX,
2134                                     AUDIO_POLICY_DEVICE_STATE_AVAILABLE,
2135                                     address.string());
2136        }
2137    }
2138    return NO_ERROR;
2139}
2140
2141status_t AudioPolicyManager::unregisterPolicyMixes(Vector<AudioMix> mixes)
2142{
2143    sp<HwModule> module;
2144    for (size_t i = 0; i < mHwModules.size(); i++) {
2145        if (strcmp(AUDIO_HARDWARE_MODULE_ID_REMOTE_SUBMIX, mHwModules[i]->mName) == 0 &&
2146                mHwModules[i]->mHandle != 0) {
2147            module = mHwModules[i];
2148            break;
2149        }
2150    }
2151
2152    if (module == 0) {
2153        return INVALID_OPERATION;
2154    }
2155
2156    ALOGV("unregisterPolicyMixes() num mixes %d", mixes.size());
2157
2158    for (size_t i = 0; i < mixes.size(); i++) {
2159        String8 address = mixes[i].mRegistrationId;
2160        ssize_t index = mPolicyMixes.indexOfKey(address);
2161        if (index < 0) {
2162            ALOGE("unregisterPolicyMixes(): mix for address %s not registered", address.string());
2163            continue;
2164        }
2165
2166        mPolicyMixes.removeItemsAt(index);
2167
2168        if (getDeviceConnectionState(AUDIO_DEVICE_IN_REMOTE_SUBMIX, address.string()) ==
2169                                             AUDIO_POLICY_DEVICE_STATE_AVAILABLE)
2170        {
2171            setDeviceConnectionStateInt(AUDIO_DEVICE_IN_REMOTE_SUBMIX,
2172                                     AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE,
2173                                     address.string());
2174        }
2175
2176        if (getDeviceConnectionState(AUDIO_DEVICE_OUT_REMOTE_SUBMIX, address.string()) ==
2177                                             AUDIO_POLICY_DEVICE_STATE_AVAILABLE)
2178        {
2179            setDeviceConnectionStateInt(AUDIO_DEVICE_OUT_REMOTE_SUBMIX,
2180                                     AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE,
2181                                     address.string());
2182        }
2183        module->removeOutputProfile(address);
2184        module->removeInputProfile(address);
2185    }
2186    return NO_ERROR;
2187}
2188
2189
2190status_t AudioPolicyManager::dump(int fd)
2191{
2192    const size_t SIZE = 256;
2193    char buffer[SIZE];
2194    String8 result;
2195
2196    snprintf(buffer, SIZE, "\nAudioPolicyManager Dump: %p\n", this);
2197    result.append(buffer);
2198
2199    snprintf(buffer, SIZE, " Primary Output: %d\n", mPrimaryOutput);
2200    result.append(buffer);
2201    snprintf(buffer, SIZE, " Phone state: %d\n", mPhoneState);
2202    result.append(buffer);
2203    snprintf(buffer, SIZE, " Force use for communications %d\n",
2204             mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION]);
2205    result.append(buffer);
2206    snprintf(buffer, SIZE, " Force use for media %d\n", mForceUse[AUDIO_POLICY_FORCE_FOR_MEDIA]);
2207    result.append(buffer);
2208    snprintf(buffer, SIZE, " Force use for record %d\n", mForceUse[AUDIO_POLICY_FORCE_FOR_RECORD]);
2209    result.append(buffer);
2210    snprintf(buffer, SIZE, " Force use for dock %d\n", mForceUse[AUDIO_POLICY_FORCE_FOR_DOCK]);
2211    result.append(buffer);
2212    snprintf(buffer, SIZE, " Force use for system %d\n", mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM]);
2213    result.append(buffer);
2214    snprintf(buffer, SIZE, " Force use for hdmi system audio %d\n",
2215            mForceUse[AUDIO_POLICY_FORCE_FOR_HDMI_SYSTEM_AUDIO]);
2216    result.append(buffer);
2217
2218    snprintf(buffer, SIZE, " Available output devices:\n");
2219    result.append(buffer);
2220    write(fd, result.string(), result.size());
2221    for (size_t i = 0; i < mAvailableOutputDevices.size(); i++) {
2222        mAvailableOutputDevices[i]->dump(fd, 2, i);
2223    }
2224    snprintf(buffer, SIZE, "\n Available input devices:\n");
2225    write(fd, buffer, strlen(buffer));
2226    for (size_t i = 0; i < mAvailableInputDevices.size(); i++) {
2227        mAvailableInputDevices[i]->dump(fd, 2, i);
2228    }
2229
2230    snprintf(buffer, SIZE, "\nHW Modules dump:\n");
2231    write(fd, buffer, strlen(buffer));
2232    for (size_t i = 0; i < mHwModules.size(); i++) {
2233        snprintf(buffer, SIZE, "- HW Module %zu:\n", i + 1);
2234        write(fd, buffer, strlen(buffer));
2235        mHwModules[i]->dump(fd);
2236    }
2237
2238    snprintf(buffer, SIZE, "\nOutputs dump:\n");
2239    write(fd, buffer, strlen(buffer));
2240    for (size_t i = 0; i < mOutputs.size(); i++) {
2241        snprintf(buffer, SIZE, "- Output %d dump:\n", mOutputs.keyAt(i));
2242        write(fd, buffer, strlen(buffer));
2243        mOutputs.valueAt(i)->dump(fd);
2244    }
2245
2246    snprintf(buffer, SIZE, "\nInputs dump:\n");
2247    write(fd, buffer, strlen(buffer));
2248    for (size_t i = 0; i < mInputs.size(); i++) {
2249        snprintf(buffer, SIZE, "- Input %d dump:\n", mInputs.keyAt(i));
2250        write(fd, buffer, strlen(buffer));
2251        mInputs.valueAt(i)->dump(fd);
2252    }
2253
2254    snprintf(buffer, SIZE, "\nStreams dump:\n");
2255    write(fd, buffer, strlen(buffer));
2256    snprintf(buffer, SIZE,
2257             " Stream  Can be muted  Index Min  Index Max  Index Cur [device : index]...\n");
2258    write(fd, buffer, strlen(buffer));
2259    for (size_t i = 0; i < AUDIO_STREAM_CNT; i++) {
2260        snprintf(buffer, SIZE, " %02zu      ", i);
2261        write(fd, buffer, strlen(buffer));
2262        mStreams[i].dump(fd);
2263    }
2264
2265    snprintf(buffer, SIZE, "\nTotal Effects CPU: %f MIPS, Total Effects memory: %d KB\n",
2266            (float)mTotalEffectsCpuLoad/10, mTotalEffectsMemory);
2267    write(fd, buffer, strlen(buffer));
2268
2269    snprintf(buffer, SIZE, "Registered effects:\n");
2270    write(fd, buffer, strlen(buffer));
2271    for (size_t i = 0; i < mEffects.size(); i++) {
2272        snprintf(buffer, SIZE, "- Effect %d dump:\n", mEffects.keyAt(i));
2273        write(fd, buffer, strlen(buffer));
2274        mEffects.valueAt(i)->dump(fd);
2275    }
2276
2277    snprintf(buffer, SIZE, "\nAudio Patches:\n");
2278    write(fd, buffer, strlen(buffer));
2279    for (size_t i = 0; i < mAudioPatches.size(); i++) {
2280        mAudioPatches[i]->dump(fd, 2, i);
2281    }
2282
2283    return NO_ERROR;
2284}
2285
2286// This function checks for the parameters which can be offloaded.
2287// This can be enhanced depending on the capability of the DSP and policy
2288// of the system.
2289bool AudioPolicyManager::isOffloadSupported(const audio_offload_info_t& offloadInfo)
2290{
2291    ALOGV("isOffloadSupported: SR=%u, CM=0x%x, Format=0x%x, StreamType=%d,"
2292     " BitRate=%u, duration=%" PRId64 " us, has_video=%d",
2293     offloadInfo.sample_rate, offloadInfo.channel_mask,
2294     offloadInfo.format,
2295     offloadInfo.stream_type, offloadInfo.bit_rate, offloadInfo.duration_us,
2296     offloadInfo.has_video);
2297
2298    // Check if offload has been disabled
2299    char propValue[PROPERTY_VALUE_MAX];
2300    if (property_get("audio.offload.disable", propValue, "0")) {
2301        if (atoi(propValue) != 0) {
2302            ALOGV("offload disabled by audio.offload.disable=%s", propValue );
2303            return false;
2304        }
2305    }
2306
2307    // Check if stream type is music, then only allow offload as of now.
2308    if (offloadInfo.stream_type != AUDIO_STREAM_MUSIC)
2309    {
2310        ALOGV("isOffloadSupported: stream_type != MUSIC, returning false");
2311        return false;
2312    }
2313
2314    //TODO: enable audio offloading with video when ready
2315    if (offloadInfo.has_video)
2316    {
2317        ALOGV("isOffloadSupported: has_video == true, returning false");
2318        return false;
2319    }
2320
2321    //If duration is less than minimum value defined in property, return false
2322    if (property_get("audio.offload.min.duration.secs", propValue, NULL)) {
2323        if (offloadInfo.duration_us < (atoi(propValue) * 1000000 )) {
2324            ALOGV("Offload denied by duration < audio.offload.min.duration.secs(=%s)", propValue);
2325            return false;
2326        }
2327    } else if (offloadInfo.duration_us < OFFLOAD_DEFAULT_MIN_DURATION_SECS * 1000000) {
2328        ALOGV("Offload denied by duration < default min(=%u)", OFFLOAD_DEFAULT_MIN_DURATION_SECS);
2329        return false;
2330    }
2331
2332    // Do not allow offloading if one non offloadable effect is enabled. This prevents from
2333    // creating an offloaded track and tearing it down immediately after start when audioflinger
2334    // detects there is an active non offloadable effect.
2335    // FIXME: We should check the audio session here but we do not have it in this context.
2336    // This may prevent offloading in rare situations where effects are left active by apps
2337    // in the background.
2338    if (isNonOffloadableEffectEnabled()) {
2339        return false;
2340    }
2341
2342    // See if there is a profile to support this.
2343    // AUDIO_DEVICE_NONE
2344    sp<IOProfile> profile = getProfileForDirectOutput(AUDIO_DEVICE_NONE /*ignore device */,
2345                                            offloadInfo.sample_rate,
2346                                            offloadInfo.format,
2347                                            offloadInfo.channel_mask,
2348                                            AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD);
2349    ALOGV("isOffloadSupported() profile %sfound", profile != 0 ? "" : "NOT ");
2350    return (profile != 0);
2351}
2352
2353status_t AudioPolicyManager::listAudioPorts(audio_port_role_t role,
2354                                            audio_port_type_t type,
2355                                            unsigned int *num_ports,
2356                                            struct audio_port *ports,
2357                                            unsigned int *generation)
2358{
2359    if (num_ports == NULL || (*num_ports != 0 && ports == NULL) ||
2360            generation == NULL) {
2361        return BAD_VALUE;
2362    }
2363    ALOGV("listAudioPorts() role %d type %d num_ports %d ports %p", role, type, *num_ports, ports);
2364    if (ports == NULL) {
2365        *num_ports = 0;
2366    }
2367
2368    size_t portsWritten = 0;
2369    size_t portsMax = *num_ports;
2370    *num_ports = 0;
2371    if (type == AUDIO_PORT_TYPE_NONE || type == AUDIO_PORT_TYPE_DEVICE) {
2372        if (role == AUDIO_PORT_ROLE_SINK || role == AUDIO_PORT_ROLE_NONE) {
2373            for (size_t i = 0;
2374                    i  < mAvailableOutputDevices.size() && portsWritten < portsMax; i++) {
2375                mAvailableOutputDevices[i]->toAudioPort(&ports[portsWritten++]);
2376            }
2377            *num_ports += mAvailableOutputDevices.size();
2378        }
2379        if (role == AUDIO_PORT_ROLE_SOURCE || role == AUDIO_PORT_ROLE_NONE) {
2380            for (size_t i = 0;
2381                    i  < mAvailableInputDevices.size() && portsWritten < portsMax; i++) {
2382                mAvailableInputDevices[i]->toAudioPort(&ports[portsWritten++]);
2383            }
2384            *num_ports += mAvailableInputDevices.size();
2385        }
2386    }
2387    if (type == AUDIO_PORT_TYPE_NONE || type == AUDIO_PORT_TYPE_MIX) {
2388        if (role == AUDIO_PORT_ROLE_SINK || role == AUDIO_PORT_ROLE_NONE) {
2389            for (size_t i = 0; i < mInputs.size() && portsWritten < portsMax; i++) {
2390                mInputs[i]->toAudioPort(&ports[portsWritten++]);
2391            }
2392            *num_ports += mInputs.size();
2393        }
2394        if (role == AUDIO_PORT_ROLE_SOURCE || role == AUDIO_PORT_ROLE_NONE) {
2395            size_t numOutputs = 0;
2396            for (size_t i = 0; i < mOutputs.size(); i++) {
2397                if (!mOutputs[i]->isDuplicated()) {
2398                    numOutputs++;
2399                    if (portsWritten < portsMax) {
2400                        mOutputs[i]->toAudioPort(&ports[portsWritten++]);
2401                    }
2402                }
2403            }
2404            *num_ports += numOutputs;
2405        }
2406    }
2407    *generation = curAudioPortGeneration();
2408    ALOGV("listAudioPorts() got %zu ports needed %d", portsWritten, *num_ports);
2409    return NO_ERROR;
2410}
2411
2412status_t AudioPolicyManager::getAudioPort(struct audio_port *port __unused)
2413{
2414    return NO_ERROR;
2415}
2416
2417sp<AudioPolicyManager::AudioOutputDescriptor> AudioPolicyManager::getOutputFromId(
2418                                                                    audio_port_handle_t id) const
2419{
2420    sp<AudioOutputDescriptor> outputDesc = NULL;
2421    for (size_t i = 0; i < mOutputs.size(); i++) {
2422        outputDesc = mOutputs.valueAt(i);
2423        if (outputDesc->mId == id) {
2424            break;
2425        }
2426    }
2427    return outputDesc;
2428}
2429
2430sp<AudioPolicyManager::AudioInputDescriptor> AudioPolicyManager::getInputFromId(
2431                                                                    audio_port_handle_t id) const
2432{
2433    sp<AudioInputDescriptor> inputDesc = NULL;
2434    for (size_t i = 0; i < mInputs.size(); i++) {
2435        inputDesc = mInputs.valueAt(i);
2436        if (inputDesc->mId == id) {
2437            break;
2438        }
2439    }
2440    return inputDesc;
2441}
2442
2443sp <AudioPolicyManager::HwModule> AudioPolicyManager::getModuleForDevice(
2444                                                                    audio_devices_t device) const
2445{
2446    sp <HwModule> module;
2447
2448    for (size_t i = 0; i < mHwModules.size(); i++) {
2449        if (mHwModules[i]->mHandle == 0) {
2450            continue;
2451        }
2452        if (audio_is_output_device(device)) {
2453            for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
2454            {
2455                if (mHwModules[i]->mOutputProfiles[j]->mSupportedDevices.types() & device) {
2456                    return mHwModules[i];
2457                }
2458            }
2459        } else {
2460            for (size_t j = 0; j < mHwModules[i]->mInputProfiles.size(); j++) {
2461                if (mHwModules[i]->mInputProfiles[j]->mSupportedDevices.types() &
2462                        device & ~AUDIO_DEVICE_BIT_IN) {
2463                    return mHwModules[i];
2464                }
2465            }
2466        }
2467    }
2468    return module;
2469}
2470
2471sp <AudioPolicyManager::HwModule> AudioPolicyManager::getModuleFromName(const char *name) const
2472{
2473    sp <HwModule> module;
2474
2475    for (size_t i = 0; i < mHwModules.size(); i++)
2476    {
2477        if (strcmp(mHwModules[i]->mName, name) == 0) {
2478            return mHwModules[i];
2479        }
2480    }
2481    return module;
2482}
2483
2484audio_devices_t AudioPolicyManager::availablePrimaryOutputDevices()
2485{
2486    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(mPrimaryOutput);
2487    audio_devices_t devices = outputDesc->mProfile->mSupportedDevices.types();
2488    return devices & mAvailableOutputDevices.types();
2489}
2490
2491audio_devices_t AudioPolicyManager::availablePrimaryInputDevices()
2492{
2493    audio_module_handle_t primaryHandle =
2494                                mOutputs.valueFor(mPrimaryOutput)->mProfile->mModule->mHandle;
2495    audio_devices_t devices = AUDIO_DEVICE_NONE;
2496    for (size_t i = 0; i < mAvailableInputDevices.size(); i++) {
2497        if (mAvailableInputDevices[i]->mModule->mHandle == primaryHandle) {
2498            devices |= mAvailableInputDevices[i]->mDeviceType;
2499        }
2500    }
2501    return devices;
2502}
2503
2504status_t AudioPolicyManager::createAudioPatch(const struct audio_patch *patch,
2505                                               audio_patch_handle_t *handle,
2506                                               uid_t uid)
2507{
2508    ALOGV("createAudioPatch()");
2509
2510    if (handle == NULL || patch == NULL) {
2511        return BAD_VALUE;
2512    }
2513    ALOGV("createAudioPatch() num sources %d num sinks %d", patch->num_sources, patch->num_sinks);
2514
2515    if (patch->num_sources == 0 || patch->num_sources > AUDIO_PATCH_PORTS_MAX ||
2516            patch->num_sinks == 0 || patch->num_sinks > AUDIO_PATCH_PORTS_MAX) {
2517        return BAD_VALUE;
2518    }
2519    // only one source per audio patch supported for now
2520    if (patch->num_sources > 1) {
2521        return INVALID_OPERATION;
2522    }
2523
2524    if (patch->sources[0].role != AUDIO_PORT_ROLE_SOURCE) {
2525        return INVALID_OPERATION;
2526    }
2527    for (size_t i = 0; i < patch->num_sinks; i++) {
2528        if (patch->sinks[i].role != AUDIO_PORT_ROLE_SINK) {
2529            return INVALID_OPERATION;
2530        }
2531    }
2532
2533    sp<AudioPatch> patchDesc;
2534    ssize_t index = mAudioPatches.indexOfKey(*handle);
2535
2536    ALOGV("createAudioPatch source id %d role %d type %d", patch->sources[0].id,
2537                                                           patch->sources[0].role,
2538                                                           patch->sources[0].type);
2539#if LOG_NDEBUG == 0
2540    for (size_t i = 0; i < patch->num_sinks; i++) {
2541        ALOGV("createAudioPatch sink %d: id %d role %d type %d", i, patch->sinks[i].id,
2542                                                             patch->sinks[i].role,
2543                                                             patch->sinks[i].type);
2544    }
2545#endif
2546
2547    if (index >= 0) {
2548        patchDesc = mAudioPatches.valueAt(index);
2549        ALOGV("createAudioPatch() mUidCached %d patchDesc->mUid %d uid %d",
2550                                                                  mUidCached, patchDesc->mUid, uid);
2551        if (patchDesc->mUid != mUidCached && uid != patchDesc->mUid) {
2552            return INVALID_OPERATION;
2553        }
2554    } else {
2555        *handle = 0;
2556    }
2557
2558    if (patch->sources[0].type == AUDIO_PORT_TYPE_MIX) {
2559        sp<AudioOutputDescriptor> outputDesc = getOutputFromId(patch->sources[0].id);
2560        if (outputDesc == NULL) {
2561            ALOGV("createAudioPatch() output not found for id %d", patch->sources[0].id);
2562            return BAD_VALUE;
2563        }
2564        ALOG_ASSERT(!outputDesc->isDuplicated(),"duplicated output %d in source in ports",
2565                                                outputDesc->mIoHandle);
2566        if (patchDesc != 0) {
2567            if (patchDesc->mPatch.sources[0].id != patch->sources[0].id) {
2568                ALOGV("createAudioPatch() source id differs for patch current id %d new id %d",
2569                                          patchDesc->mPatch.sources[0].id, patch->sources[0].id);
2570                return BAD_VALUE;
2571            }
2572        }
2573        DeviceVector devices;
2574        for (size_t i = 0; i < patch->num_sinks; i++) {
2575            // Only support mix to devices connection
2576            // TODO add support for mix to mix connection
2577            if (patch->sinks[i].type != AUDIO_PORT_TYPE_DEVICE) {
2578                ALOGV("createAudioPatch() source mix but sink is not a device");
2579                return INVALID_OPERATION;
2580            }
2581            sp<DeviceDescriptor> devDesc =
2582                    mAvailableOutputDevices.getDeviceFromId(patch->sinks[i].id);
2583            if (devDesc == 0) {
2584                ALOGV("createAudioPatch() out device not found for id %d", patch->sinks[i].id);
2585                return BAD_VALUE;
2586            }
2587
2588            if (!outputDesc->mProfile->isCompatibleProfile(devDesc->mDeviceType,
2589                                                           devDesc->mAddress,
2590                                                           patch->sources[0].sample_rate,
2591                                                         NULL,  // updatedSamplingRate
2592                                                         patch->sources[0].format,
2593                                                         patch->sources[0].channel_mask,
2594                                                         AUDIO_OUTPUT_FLAG_NONE /*FIXME*/)) {
2595                ALOGV("createAudioPatch() profile not supported for device %08x",
2596                      devDesc->mDeviceType);
2597                return INVALID_OPERATION;
2598            }
2599            devices.add(devDesc);
2600        }
2601        if (devices.size() == 0) {
2602            return INVALID_OPERATION;
2603        }
2604
2605        // TODO: reconfigure output format and channels here
2606        ALOGV("createAudioPatch() setting device %08x on output %d",
2607              devices.types(), outputDesc->mIoHandle);
2608        setOutputDevice(outputDesc->mIoHandle, devices.types(), true, 0, handle);
2609        index = mAudioPatches.indexOfKey(*handle);
2610        if (index >= 0) {
2611            if (patchDesc != 0 && patchDesc != mAudioPatches.valueAt(index)) {
2612                ALOGW("createAudioPatch() setOutputDevice() did not reuse the patch provided");
2613            }
2614            patchDesc = mAudioPatches.valueAt(index);
2615            patchDesc->mUid = uid;
2616            ALOGV("createAudioPatch() success");
2617        } else {
2618            ALOGW("createAudioPatch() setOutputDevice() failed to create a patch");
2619            return INVALID_OPERATION;
2620        }
2621    } else if (patch->sources[0].type == AUDIO_PORT_TYPE_DEVICE) {
2622        if (patch->sinks[0].type == AUDIO_PORT_TYPE_MIX) {
2623            // input device to input mix connection
2624            // only one sink supported when connecting an input device to a mix
2625            if (patch->num_sinks > 1) {
2626                return INVALID_OPERATION;
2627            }
2628            sp<AudioInputDescriptor> inputDesc = getInputFromId(patch->sinks[0].id);
2629            if (inputDesc == NULL) {
2630                return BAD_VALUE;
2631            }
2632            if (patchDesc != 0) {
2633                if (patchDesc->mPatch.sinks[0].id != patch->sinks[0].id) {
2634                    return BAD_VALUE;
2635                }
2636            }
2637            sp<DeviceDescriptor> devDesc =
2638                    mAvailableInputDevices.getDeviceFromId(patch->sources[0].id);
2639            if (devDesc == 0) {
2640                return BAD_VALUE;
2641            }
2642
2643            if (!inputDesc->mProfile->isCompatibleProfile(devDesc->mDeviceType,
2644                                                          devDesc->mAddress,
2645                                                          patch->sinks[0].sample_rate,
2646                                                          NULL, /*updatedSampleRate*/
2647                                                          patch->sinks[0].format,
2648                                                          patch->sinks[0].channel_mask,
2649                                                          // FIXME for the parameter type,
2650                                                          // and the NONE
2651                                                          (audio_output_flags_t)
2652                                                            AUDIO_INPUT_FLAG_NONE)) {
2653                return INVALID_OPERATION;
2654            }
2655            // TODO: reconfigure output format and channels here
2656            ALOGV("createAudioPatch() setting device %08x on output %d",
2657                                                  devDesc->mDeviceType, inputDesc->mIoHandle);
2658            setInputDevice(inputDesc->mIoHandle, devDesc->mDeviceType, true, handle);
2659            index = mAudioPatches.indexOfKey(*handle);
2660            if (index >= 0) {
2661                if (patchDesc != 0 && patchDesc != mAudioPatches.valueAt(index)) {
2662                    ALOGW("createAudioPatch() setInputDevice() did not reuse the patch provided");
2663                }
2664                patchDesc = mAudioPatches.valueAt(index);
2665                patchDesc->mUid = uid;
2666                ALOGV("createAudioPatch() success");
2667            } else {
2668                ALOGW("createAudioPatch() setInputDevice() failed to create a patch");
2669                return INVALID_OPERATION;
2670            }
2671        } else if (patch->sinks[0].type == AUDIO_PORT_TYPE_DEVICE) {
2672            // device to device connection
2673            if (patchDesc != 0) {
2674                if (patchDesc->mPatch.sources[0].id != patch->sources[0].id) {
2675                    return BAD_VALUE;
2676                }
2677            }
2678            sp<DeviceDescriptor> srcDeviceDesc =
2679                    mAvailableInputDevices.getDeviceFromId(patch->sources[0].id);
2680            if (srcDeviceDesc == 0) {
2681                return BAD_VALUE;
2682            }
2683
2684            //update source and sink with our own data as the data passed in the patch may
2685            // be incomplete.
2686            struct audio_patch newPatch = *patch;
2687            srcDeviceDesc->toAudioPortConfig(&newPatch.sources[0], &patch->sources[0]);
2688
2689            for (size_t i = 0; i < patch->num_sinks; i++) {
2690                if (patch->sinks[i].type != AUDIO_PORT_TYPE_DEVICE) {
2691                    ALOGV("createAudioPatch() source device but one sink is not a device");
2692                    return INVALID_OPERATION;
2693                }
2694
2695                sp<DeviceDescriptor> sinkDeviceDesc =
2696                        mAvailableOutputDevices.getDeviceFromId(patch->sinks[i].id);
2697                if (sinkDeviceDesc == 0) {
2698                    return BAD_VALUE;
2699                }
2700                sinkDeviceDesc->toAudioPortConfig(&newPatch.sinks[i], &patch->sinks[i]);
2701
2702                if (srcDeviceDesc->mModule != sinkDeviceDesc->mModule) {
2703                    // only one sink supported when connected devices across HW modules
2704                    if (patch->num_sinks > 1) {
2705                        return INVALID_OPERATION;
2706                    }
2707                    SortedVector<audio_io_handle_t> outputs =
2708                                            getOutputsForDevice(sinkDeviceDesc->mDeviceType,
2709                                                                mOutputs);
2710                    // if the sink device is reachable via an opened output stream, request to go via
2711                    // this output stream by adding a second source to the patch description
2712                    audio_io_handle_t output = selectOutput(outputs,
2713                                                            AUDIO_OUTPUT_FLAG_NONE,
2714                                                            AUDIO_FORMAT_INVALID);
2715                    if (output != AUDIO_IO_HANDLE_NONE) {
2716                        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
2717                        if (outputDesc->isDuplicated()) {
2718                            return INVALID_OPERATION;
2719                        }
2720                        outputDesc->toAudioPortConfig(&newPatch.sources[1], &patch->sources[0]);
2721                        newPatch.num_sources = 2;
2722                    }
2723                }
2724            }
2725            // TODO: check from routing capabilities in config file and other conflicting patches
2726
2727            audio_patch_handle_t afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
2728            if (index >= 0) {
2729                afPatchHandle = patchDesc->mAfPatchHandle;
2730            }
2731
2732            status_t status = mpClientInterface->createAudioPatch(&newPatch,
2733                                                                  &afPatchHandle,
2734                                                                  0);
2735            ALOGV("createAudioPatch() patch panel returned %d patchHandle %d",
2736                                                                  status, afPatchHandle);
2737            if (status == NO_ERROR) {
2738                if (index < 0) {
2739                    patchDesc = new AudioPatch((audio_patch_handle_t)nextUniqueId(),
2740                                               &newPatch, uid);
2741                    addAudioPatch(patchDesc->mHandle, patchDesc);
2742                } else {
2743                    patchDesc->mPatch = newPatch;
2744                }
2745                patchDesc->mAfPatchHandle = afPatchHandle;
2746                *handle = patchDesc->mHandle;
2747                nextAudioPortGeneration();
2748                mpClientInterface->onAudioPatchListUpdate();
2749            } else {
2750                ALOGW("createAudioPatch() patch panel could not connect device patch, error %d",
2751                status);
2752                return INVALID_OPERATION;
2753            }
2754        } else {
2755            return BAD_VALUE;
2756        }
2757    } else {
2758        return BAD_VALUE;
2759    }
2760    return NO_ERROR;
2761}
2762
2763status_t AudioPolicyManager::releaseAudioPatch(audio_patch_handle_t handle,
2764                                                  uid_t uid)
2765{
2766    ALOGV("releaseAudioPatch() patch %d", handle);
2767
2768    ssize_t index = mAudioPatches.indexOfKey(handle);
2769
2770    if (index < 0) {
2771        return BAD_VALUE;
2772    }
2773    sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
2774    ALOGV("releaseAudioPatch() mUidCached %d patchDesc->mUid %d uid %d",
2775          mUidCached, patchDesc->mUid, uid);
2776    if (patchDesc->mUid != mUidCached && uid != patchDesc->mUid) {
2777        return INVALID_OPERATION;
2778    }
2779
2780    struct audio_patch *patch = &patchDesc->mPatch;
2781    patchDesc->mUid = mUidCached;
2782    if (patch->sources[0].type == AUDIO_PORT_TYPE_MIX) {
2783        sp<AudioOutputDescriptor> outputDesc = getOutputFromId(patch->sources[0].id);
2784        if (outputDesc == NULL) {
2785            ALOGV("releaseAudioPatch() output not found for id %d", patch->sources[0].id);
2786            return BAD_VALUE;
2787        }
2788
2789        setOutputDevice(outputDesc->mIoHandle,
2790                        getNewOutputDevice(outputDesc->mIoHandle, true /*fromCache*/),
2791                       true,
2792                       0,
2793                       NULL);
2794    } else if (patch->sources[0].type == AUDIO_PORT_TYPE_DEVICE) {
2795        if (patch->sinks[0].type == AUDIO_PORT_TYPE_MIX) {
2796            sp<AudioInputDescriptor> inputDesc = getInputFromId(patch->sinks[0].id);
2797            if (inputDesc == NULL) {
2798                ALOGV("releaseAudioPatch() input not found for id %d", patch->sinks[0].id);
2799                return BAD_VALUE;
2800            }
2801            setInputDevice(inputDesc->mIoHandle,
2802                           getNewInputDevice(inputDesc->mIoHandle),
2803                           true,
2804                           NULL);
2805        } else if (patch->sinks[0].type == AUDIO_PORT_TYPE_DEVICE) {
2806            audio_patch_handle_t afPatchHandle = patchDesc->mAfPatchHandle;
2807            status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, 0);
2808            ALOGV("releaseAudioPatch() patch panel returned %d patchHandle %d",
2809                                                              status, patchDesc->mAfPatchHandle);
2810            removeAudioPatch(patchDesc->mHandle);
2811            nextAudioPortGeneration();
2812            mpClientInterface->onAudioPatchListUpdate();
2813        } else {
2814            return BAD_VALUE;
2815        }
2816    } else {
2817        return BAD_VALUE;
2818    }
2819    return NO_ERROR;
2820}
2821
2822status_t AudioPolicyManager::listAudioPatches(unsigned int *num_patches,
2823                                              struct audio_patch *patches,
2824                                              unsigned int *generation)
2825{
2826    if (num_patches == NULL || (*num_patches != 0 && patches == NULL) ||
2827            generation == NULL) {
2828        return BAD_VALUE;
2829    }
2830    ALOGV("listAudioPatches() num_patches %d patches %p available patches %zu",
2831          *num_patches, patches, mAudioPatches.size());
2832    if (patches == NULL) {
2833        *num_patches = 0;
2834    }
2835
2836    size_t patchesWritten = 0;
2837    size_t patchesMax = *num_patches;
2838    for (size_t i = 0;
2839            i  < mAudioPatches.size() && patchesWritten < patchesMax; i++) {
2840        patches[patchesWritten] = mAudioPatches[i]->mPatch;
2841        patches[patchesWritten++].id = mAudioPatches[i]->mHandle;
2842        ALOGV("listAudioPatches() patch %zu num_sources %d num_sinks %d",
2843              i, mAudioPatches[i]->mPatch.num_sources, mAudioPatches[i]->mPatch.num_sinks);
2844    }
2845    *num_patches = mAudioPatches.size();
2846
2847    *generation = curAudioPortGeneration();
2848    ALOGV("listAudioPatches() got %zu patches needed %d", patchesWritten, *num_patches);
2849    return NO_ERROR;
2850}
2851
2852status_t AudioPolicyManager::setAudioPortConfig(const struct audio_port_config *config)
2853{
2854    ALOGV("setAudioPortConfig()");
2855
2856    if (config == NULL) {
2857        return BAD_VALUE;
2858    }
2859    ALOGV("setAudioPortConfig() on port handle %d", config->id);
2860    // Only support gain configuration for now
2861    if (config->config_mask != AUDIO_PORT_CONFIG_GAIN) {
2862        return INVALID_OPERATION;
2863    }
2864
2865    sp<AudioPortConfig> audioPortConfig;
2866    if (config->type == AUDIO_PORT_TYPE_MIX) {
2867        if (config->role == AUDIO_PORT_ROLE_SOURCE) {
2868            sp<AudioOutputDescriptor> outputDesc = getOutputFromId(config->id);
2869            if (outputDesc == NULL) {
2870                return BAD_VALUE;
2871            }
2872            ALOG_ASSERT(!outputDesc->isDuplicated(),
2873                        "setAudioPortConfig() called on duplicated output %d",
2874                        outputDesc->mIoHandle);
2875            audioPortConfig = outputDesc;
2876        } else if (config->role == AUDIO_PORT_ROLE_SINK) {
2877            sp<AudioInputDescriptor> inputDesc = getInputFromId(config->id);
2878            if (inputDesc == NULL) {
2879                return BAD_VALUE;
2880            }
2881            audioPortConfig = inputDesc;
2882        } else {
2883            return BAD_VALUE;
2884        }
2885    } else if (config->type == AUDIO_PORT_TYPE_DEVICE) {
2886        sp<DeviceDescriptor> deviceDesc;
2887        if (config->role == AUDIO_PORT_ROLE_SOURCE) {
2888            deviceDesc = mAvailableInputDevices.getDeviceFromId(config->id);
2889        } else if (config->role == AUDIO_PORT_ROLE_SINK) {
2890            deviceDesc = mAvailableOutputDevices.getDeviceFromId(config->id);
2891        } else {
2892            return BAD_VALUE;
2893        }
2894        if (deviceDesc == NULL) {
2895            return BAD_VALUE;
2896        }
2897        audioPortConfig = deviceDesc;
2898    } else {
2899        return BAD_VALUE;
2900    }
2901
2902    struct audio_port_config backupConfig;
2903    status_t status = audioPortConfig->applyAudioPortConfig(config, &backupConfig);
2904    if (status == NO_ERROR) {
2905        struct audio_port_config newConfig;
2906        audioPortConfig->toAudioPortConfig(&newConfig, config);
2907        status = mpClientInterface->setAudioPortConfig(&newConfig, 0);
2908    }
2909    if (status != NO_ERROR) {
2910        audioPortConfig->applyAudioPortConfig(&backupConfig);
2911    }
2912
2913    return status;
2914}
2915
2916void AudioPolicyManager::clearAudioPatches(uid_t uid)
2917{
2918    for (ssize_t i = (ssize_t)mAudioPatches.size() - 1; i >= 0; i--)  {
2919        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(i);
2920        if (patchDesc->mUid == uid) {
2921            releaseAudioPatch(mAudioPatches.keyAt(i), uid);
2922        }
2923    }
2924}
2925
2926status_t AudioPolicyManager::acquireSoundTriggerSession(audio_session_t *session,
2927                                       audio_io_handle_t *ioHandle,
2928                                       audio_devices_t *device)
2929{
2930    *session = (audio_session_t)mpClientInterface->newAudioUniqueId();
2931    *ioHandle = (audio_io_handle_t)mpClientInterface->newAudioUniqueId();
2932    *device = getDeviceAndMixForInputSource(AUDIO_SOURCE_HOTWORD);
2933
2934    mSoundTriggerSessions.add(*session, *ioHandle);
2935
2936    return NO_ERROR;
2937}
2938
2939status_t AudioPolicyManager::releaseSoundTriggerSession(audio_session_t session)
2940{
2941    ssize_t index = mSoundTriggerSessions.indexOfKey(session);
2942    if (index < 0) {
2943        ALOGW("acquireSoundTriggerSession() session %d not registered", session);
2944        return BAD_VALUE;
2945    }
2946
2947    mSoundTriggerSessions.removeItem(session);
2948    return NO_ERROR;
2949}
2950
2951status_t AudioPolicyManager::addAudioPatch(audio_patch_handle_t handle,
2952                                           const sp<AudioPatch>& patch)
2953{
2954    ssize_t index = mAudioPatches.indexOfKey(handle);
2955
2956    if (index >= 0) {
2957        ALOGW("addAudioPatch() patch %d already in", handle);
2958        return ALREADY_EXISTS;
2959    }
2960    mAudioPatches.add(handle, patch);
2961    ALOGV("addAudioPatch() handle %d af handle %d num_sources %d num_sinks %d source handle %d"
2962            "sink handle %d",
2963          handle, patch->mAfPatchHandle, patch->mPatch.num_sources, patch->mPatch.num_sinks,
2964          patch->mPatch.sources[0].id, patch->mPatch.sinks[0].id);
2965    return NO_ERROR;
2966}
2967
2968status_t AudioPolicyManager::removeAudioPatch(audio_patch_handle_t handle)
2969{
2970    ssize_t index = mAudioPatches.indexOfKey(handle);
2971
2972    if (index < 0) {
2973        ALOGW("removeAudioPatch() patch %d not in", handle);
2974        return ALREADY_EXISTS;
2975    }
2976    ALOGV("removeAudioPatch() handle %d af handle %d", handle,
2977                      mAudioPatches.valueAt(index)->mAfPatchHandle);
2978    mAudioPatches.removeItemsAt(index);
2979    return NO_ERROR;
2980}
2981
2982// ----------------------------------------------------------------------------
2983// AudioPolicyManager
2984// ----------------------------------------------------------------------------
2985
2986uint32_t AudioPolicyManager::nextUniqueId()
2987{
2988    return android_atomic_inc(&mNextUniqueId);
2989}
2990
2991uint32_t AudioPolicyManager::nextAudioPortGeneration()
2992{
2993    return android_atomic_inc(&mAudioPortGeneration);
2994}
2995
2996AudioPolicyManager::AudioPolicyManager(AudioPolicyClientInterface *clientInterface)
2997    :
2998#ifdef AUDIO_POLICY_TEST
2999    Thread(false),
3000#endif //AUDIO_POLICY_TEST
3001    mPrimaryOutput((audio_io_handle_t)0),
3002    mPhoneState(AUDIO_MODE_NORMAL),
3003    mLimitRingtoneVolume(false), mLastVoiceVolume(-1.0f),
3004    mTotalEffectsCpuLoad(0), mTotalEffectsMemory(0),
3005    mA2dpSuspended(false),
3006    mSpeakerDrcEnabled(false), mNextUniqueId(1),
3007    mAudioPortGeneration(1),
3008    mBeaconMuteRefCount(0),
3009    mBeaconPlayingRefCount(0),
3010    mBeaconMuted(false)
3011{
3012    mUidCached = getuid();
3013    mpClientInterface = clientInterface;
3014
3015    for (int i = 0; i < AUDIO_POLICY_FORCE_USE_CNT; i++) {
3016        mForceUse[i] = AUDIO_POLICY_FORCE_NONE;
3017    }
3018
3019    mDefaultOutputDevice = new DeviceDescriptor(String8(""), AUDIO_DEVICE_OUT_SPEAKER);
3020    if (loadAudioPolicyConfig(AUDIO_POLICY_VENDOR_CONFIG_FILE) != NO_ERROR) {
3021        if (loadAudioPolicyConfig(AUDIO_POLICY_CONFIG_FILE) != NO_ERROR) {
3022            ALOGE("could not load audio policy configuration file, setting defaults");
3023            defaultAudioPolicyConfig();
3024        }
3025    }
3026    // mAvailableOutputDevices and mAvailableInputDevices now contain all attached devices
3027
3028    // must be done after reading the policy
3029    initializeVolumeCurves();
3030
3031    // open all output streams needed to access attached devices
3032    audio_devices_t outputDeviceTypes = mAvailableOutputDevices.types();
3033    audio_devices_t inputDeviceTypes = mAvailableInputDevices.types() & ~AUDIO_DEVICE_BIT_IN;
3034    for (size_t i = 0; i < mHwModules.size(); i++) {
3035        mHwModules[i]->mHandle = mpClientInterface->loadHwModule(mHwModules[i]->mName);
3036        if (mHwModules[i]->mHandle == 0) {
3037            ALOGW("could not open HW module %s", mHwModules[i]->mName);
3038            continue;
3039        }
3040        // open all output streams needed to access attached devices
3041        // except for direct output streams that are only opened when they are actually
3042        // required by an app.
3043        // This also validates mAvailableOutputDevices list
3044        for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
3045        {
3046            const sp<IOProfile> outProfile = mHwModules[i]->mOutputProfiles[j];
3047
3048            if (outProfile->mSupportedDevices.isEmpty()) {
3049                ALOGW("Output profile contains no device on module %s", mHwModules[i]->mName);
3050                continue;
3051            }
3052
3053            if ((outProfile->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) != 0) {
3054                continue;
3055            }
3056            audio_devices_t profileType = outProfile->mSupportedDevices.types();
3057            if ((profileType & mDefaultOutputDevice->mDeviceType) != AUDIO_DEVICE_NONE) {
3058                profileType = mDefaultOutputDevice->mDeviceType;
3059            } else {
3060                // chose first device present in mSupportedDevices also part of
3061                // outputDeviceTypes
3062                for (size_t k = 0; k  < outProfile->mSupportedDevices.size(); k++) {
3063                    profileType = outProfile->mSupportedDevices[k]->mDeviceType;
3064                    if ((profileType & outputDeviceTypes) != 0) {
3065                        break;
3066                    }
3067                }
3068            }
3069            if ((profileType & outputDeviceTypes) == 0) {
3070                continue;
3071            }
3072            sp<AudioOutputDescriptor> outputDesc = new AudioOutputDescriptor(outProfile);
3073
3074            outputDesc->mDevice = profileType;
3075            audio_config_t config = AUDIO_CONFIG_INITIALIZER;
3076            config.sample_rate = outputDesc->mSamplingRate;
3077            config.channel_mask = outputDesc->mChannelMask;
3078            config.format = outputDesc->mFormat;
3079            audio_io_handle_t output = AUDIO_IO_HANDLE_NONE;
3080            status_t status = mpClientInterface->openOutput(outProfile->mModule->mHandle,
3081                                                            &output,
3082                                                            &config,
3083                                                            &outputDesc->mDevice,
3084                                                            String8(""),
3085                                                            &outputDesc->mLatency,
3086                                                            outputDesc->mFlags);
3087
3088            if (status != NO_ERROR) {
3089                ALOGW("Cannot open output stream for device %08x on hw module %s",
3090                      outputDesc->mDevice,
3091                      mHwModules[i]->mName);
3092            } else {
3093                outputDesc->mSamplingRate = config.sample_rate;
3094                outputDesc->mChannelMask = config.channel_mask;
3095                outputDesc->mFormat = config.format;
3096
3097                for (size_t k = 0; k  < outProfile->mSupportedDevices.size(); k++) {
3098                    audio_devices_t type = outProfile->mSupportedDevices[k]->mDeviceType;
3099                    ssize_t index =
3100                            mAvailableOutputDevices.indexOf(outProfile->mSupportedDevices[k]);
3101                    // give a valid ID to an attached device once confirmed it is reachable
3102                    if ((index >= 0) && (mAvailableOutputDevices[index]->mId == 0)) {
3103                        mAvailableOutputDevices[index]->mId = nextUniqueId();
3104                        mAvailableOutputDevices[index]->mModule = mHwModules[i];
3105                    }
3106                }
3107                if (mPrimaryOutput == 0 &&
3108                        outProfile->mFlags & AUDIO_OUTPUT_FLAG_PRIMARY) {
3109                    mPrimaryOutput = output;
3110                }
3111                addOutput(output, outputDesc);
3112                setOutputDevice(output,
3113                                outputDesc->mDevice,
3114                                true);
3115            }
3116        }
3117        // open input streams needed to access attached devices to validate
3118        // mAvailableInputDevices list
3119        for (size_t j = 0; j < mHwModules[i]->mInputProfiles.size(); j++)
3120        {
3121            const sp<IOProfile> inProfile = mHwModules[i]->mInputProfiles[j];
3122
3123            if (inProfile->mSupportedDevices.isEmpty()) {
3124                ALOGW("Input profile contains no device on module %s", mHwModules[i]->mName);
3125                continue;
3126            }
3127            // chose first device present in mSupportedDevices also part of
3128            // inputDeviceTypes
3129            audio_devices_t profileType = AUDIO_DEVICE_NONE;
3130            for (size_t k = 0; k  < inProfile->mSupportedDevices.size(); k++) {
3131                profileType = inProfile->mSupportedDevices[k]->mDeviceType;
3132                if (profileType & inputDeviceTypes) {
3133                    break;
3134                }
3135            }
3136            if ((profileType & inputDeviceTypes) == 0) {
3137                continue;
3138            }
3139            sp<AudioInputDescriptor> inputDesc = new AudioInputDescriptor(inProfile);
3140
3141            inputDesc->mInputSource = AUDIO_SOURCE_MIC;
3142            inputDesc->mDevice = profileType;
3143
3144            // find the address
3145            DeviceVector inputDevices = mAvailableInputDevices.getDevicesFromType(profileType);
3146            //   the inputs vector must be of size 1, but we don't want to crash here
3147            String8 address = inputDevices.size() > 0 ? inputDevices.itemAt(0)->mAddress
3148                    : String8("");
3149            ALOGV("  for input device 0x%x using address %s", profileType, address.string());
3150            ALOGE_IF(inputDevices.size() == 0, "Input device list is empty!");
3151
3152            audio_config_t config = AUDIO_CONFIG_INITIALIZER;
3153            config.sample_rate = inputDesc->mSamplingRate;
3154            config.channel_mask = inputDesc->mChannelMask;
3155            config.format = inputDesc->mFormat;
3156            audio_io_handle_t input = AUDIO_IO_HANDLE_NONE;
3157            status_t status = mpClientInterface->openInput(inProfile->mModule->mHandle,
3158                                                           &input,
3159                                                           &config,
3160                                                           &inputDesc->mDevice,
3161                                                           address,
3162                                                           AUDIO_SOURCE_MIC,
3163                                                           AUDIO_INPUT_FLAG_NONE);
3164
3165            if (status == NO_ERROR) {
3166                for (size_t k = 0; k  < inProfile->mSupportedDevices.size(); k++) {
3167                    audio_devices_t type = inProfile->mSupportedDevices[k]->mDeviceType;
3168                    ssize_t index =
3169                            mAvailableInputDevices.indexOf(inProfile->mSupportedDevices[k]);
3170                    // give a valid ID to an attached device once confirmed it is reachable
3171                    if ((index >= 0) && (mAvailableInputDevices[index]->mId == 0)) {
3172                        mAvailableInputDevices[index]->mId = nextUniqueId();
3173                        mAvailableInputDevices[index]->mModule = mHwModules[i];
3174                    }
3175                }
3176                mpClientInterface->closeInput(input);
3177            } else {
3178                ALOGW("Cannot open input stream for device %08x on hw module %s",
3179                      inputDesc->mDevice,
3180                      mHwModules[i]->mName);
3181            }
3182        }
3183    }
3184    // make sure all attached devices have been allocated a unique ID
3185    for (size_t i = 0; i  < mAvailableOutputDevices.size();) {
3186        if (mAvailableOutputDevices[i]->mId == 0) {
3187            ALOGW("Input device %08x unreachable", mAvailableOutputDevices[i]->mDeviceType);
3188            mAvailableOutputDevices.remove(mAvailableOutputDevices[i]);
3189            continue;
3190        }
3191        i++;
3192    }
3193    for (size_t i = 0; i  < mAvailableInputDevices.size();) {
3194        if (mAvailableInputDevices[i]->mId == 0) {
3195            ALOGW("Input device %08x unreachable", mAvailableInputDevices[i]->mDeviceType);
3196            mAvailableInputDevices.remove(mAvailableInputDevices[i]);
3197            continue;
3198        }
3199        i++;
3200    }
3201    // make sure default device is reachable
3202    if (mAvailableOutputDevices.indexOf(mDefaultOutputDevice) < 0) {
3203        ALOGE("Default device %08x is unreachable", mDefaultOutputDevice->mDeviceType);
3204    }
3205
3206    ALOGE_IF((mPrimaryOutput == 0), "Failed to open primary output");
3207
3208    updateDevicesAndOutputs();
3209
3210#ifdef AUDIO_POLICY_TEST
3211    if (mPrimaryOutput != 0) {
3212        AudioParameter outputCmd = AudioParameter();
3213        outputCmd.addInt(String8("set_id"), 0);
3214        mpClientInterface->setParameters(mPrimaryOutput, outputCmd.toString());
3215
3216        mTestDevice = AUDIO_DEVICE_OUT_SPEAKER;
3217        mTestSamplingRate = 44100;
3218        mTestFormat = AUDIO_FORMAT_PCM_16_BIT;
3219        mTestChannels =  AUDIO_CHANNEL_OUT_STEREO;
3220        mTestLatencyMs = 0;
3221        mCurOutput = 0;
3222        mDirectOutput = false;
3223        for (int i = 0; i < NUM_TEST_OUTPUTS; i++) {
3224            mTestOutputs[i] = 0;
3225        }
3226
3227        const size_t SIZE = 256;
3228        char buffer[SIZE];
3229        snprintf(buffer, SIZE, "AudioPolicyManagerTest");
3230        run(buffer, ANDROID_PRIORITY_AUDIO);
3231    }
3232#endif //AUDIO_POLICY_TEST
3233}
3234
3235AudioPolicyManager::~AudioPolicyManager()
3236{
3237#ifdef AUDIO_POLICY_TEST
3238    exit();
3239#endif //AUDIO_POLICY_TEST
3240   for (size_t i = 0; i < mOutputs.size(); i++) {
3241        mpClientInterface->closeOutput(mOutputs.keyAt(i));
3242   }
3243   for (size_t i = 0; i < mInputs.size(); i++) {
3244        mpClientInterface->closeInput(mInputs.keyAt(i));
3245   }
3246   mAvailableOutputDevices.clear();
3247   mAvailableInputDevices.clear();
3248   mOutputs.clear();
3249   mInputs.clear();
3250   mHwModules.clear();
3251}
3252
3253status_t AudioPolicyManager::initCheck()
3254{
3255    return (mPrimaryOutput == 0) ? NO_INIT : NO_ERROR;
3256}
3257
3258#ifdef AUDIO_POLICY_TEST
3259bool AudioPolicyManager::threadLoop()
3260{
3261    ALOGV("entering threadLoop()");
3262    while (!exitPending())
3263    {
3264        String8 command;
3265        int valueInt;
3266        String8 value;
3267
3268        Mutex::Autolock _l(mLock);
3269        mWaitWorkCV.waitRelative(mLock, milliseconds(50));
3270
3271        command = mpClientInterface->getParameters(0, String8("test_cmd_policy"));
3272        AudioParameter param = AudioParameter(command);
3273
3274        if (param.getInt(String8("test_cmd_policy"), valueInt) == NO_ERROR &&
3275            valueInt != 0) {
3276            ALOGV("Test command %s received", command.string());
3277            String8 target;
3278            if (param.get(String8("target"), target) != NO_ERROR) {
3279                target = "Manager";
3280            }
3281            if (param.getInt(String8("test_cmd_policy_output"), valueInt) == NO_ERROR) {
3282                param.remove(String8("test_cmd_policy_output"));
3283                mCurOutput = valueInt;
3284            }
3285            if (param.get(String8("test_cmd_policy_direct"), value) == NO_ERROR) {
3286                param.remove(String8("test_cmd_policy_direct"));
3287                if (value == "false") {
3288                    mDirectOutput = false;
3289                } else if (value == "true") {
3290                    mDirectOutput = true;
3291                }
3292            }
3293            if (param.getInt(String8("test_cmd_policy_input"), valueInt) == NO_ERROR) {
3294                param.remove(String8("test_cmd_policy_input"));
3295                mTestInput = valueInt;
3296            }
3297
3298            if (param.get(String8("test_cmd_policy_format"), value) == NO_ERROR) {
3299                param.remove(String8("test_cmd_policy_format"));
3300                int format = AUDIO_FORMAT_INVALID;
3301                if (value == "PCM 16 bits") {
3302                    format = AUDIO_FORMAT_PCM_16_BIT;
3303                } else if (value == "PCM 8 bits") {
3304                    format = AUDIO_FORMAT_PCM_8_BIT;
3305                } else if (value == "Compressed MP3") {
3306                    format = AUDIO_FORMAT_MP3;
3307                }
3308                if (format != AUDIO_FORMAT_INVALID) {
3309                    if (target == "Manager") {
3310                        mTestFormat = format;
3311                    } else if (mTestOutputs[mCurOutput] != 0) {
3312                        AudioParameter outputParam = AudioParameter();
3313                        outputParam.addInt(String8("format"), format);
3314                        mpClientInterface->setParameters(mTestOutputs[mCurOutput], outputParam.toString());
3315                    }
3316                }
3317            }
3318            if (param.get(String8("test_cmd_policy_channels"), value) == NO_ERROR) {
3319                param.remove(String8("test_cmd_policy_channels"));
3320                int channels = 0;
3321
3322                if (value == "Channels Stereo") {
3323                    channels =  AUDIO_CHANNEL_OUT_STEREO;
3324                } else if (value == "Channels Mono") {
3325                    channels =  AUDIO_CHANNEL_OUT_MONO;
3326                }
3327                if (channels != 0) {
3328                    if (target == "Manager") {
3329                        mTestChannels = channels;
3330                    } else if (mTestOutputs[mCurOutput] != 0) {
3331                        AudioParameter outputParam = AudioParameter();
3332                        outputParam.addInt(String8("channels"), channels);
3333                        mpClientInterface->setParameters(mTestOutputs[mCurOutput], outputParam.toString());
3334                    }
3335                }
3336            }
3337            if (param.getInt(String8("test_cmd_policy_sampleRate"), valueInt) == NO_ERROR) {
3338                param.remove(String8("test_cmd_policy_sampleRate"));
3339                if (valueInt >= 0 && valueInt <= 96000) {
3340                    int samplingRate = valueInt;
3341                    if (target == "Manager") {
3342                        mTestSamplingRate = samplingRate;
3343                    } else if (mTestOutputs[mCurOutput] != 0) {
3344                        AudioParameter outputParam = AudioParameter();
3345                        outputParam.addInt(String8("sampling_rate"), samplingRate);
3346                        mpClientInterface->setParameters(mTestOutputs[mCurOutput], outputParam.toString());
3347                    }
3348                }
3349            }
3350
3351            if (param.get(String8("test_cmd_policy_reopen"), value) == NO_ERROR) {
3352                param.remove(String8("test_cmd_policy_reopen"));
3353
3354                sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(mPrimaryOutput);
3355                mpClientInterface->closeOutput(mPrimaryOutput);
3356
3357                audio_module_handle_t moduleHandle = outputDesc->mModule->mHandle;
3358
3359                mOutputs.removeItem(mPrimaryOutput);
3360
3361                sp<AudioOutputDescriptor> outputDesc = new AudioOutputDescriptor(NULL);
3362                outputDesc->mDevice = AUDIO_DEVICE_OUT_SPEAKER;
3363                audio_config_t config = AUDIO_CONFIG_INITIALIZER;
3364                config.sample_rate = outputDesc->mSamplingRate;
3365                config.channel_mask = outputDesc->mChannelMask;
3366                config.format = outputDesc->mFormat;
3367                status_t status = mpClientInterface->openOutput(moduleHandle,
3368                                                                &mPrimaryOutput,
3369                                                                &config,
3370                                                                &outputDesc->mDevice,
3371                                                                String8(""),
3372                                                                &outputDesc->mLatency,
3373                                                                outputDesc->mFlags);
3374                if (status != NO_ERROR) {
3375                    ALOGE("Failed to reopen hardware output stream, "
3376                        "samplingRate: %d, format %d, channels %d",
3377                        outputDesc->mSamplingRate, outputDesc->mFormat, outputDesc->mChannelMask);
3378                } else {
3379                    outputDesc->mSamplingRate = config.sample_rate;
3380                    outputDesc->mChannelMask = config.channel_mask;
3381                    outputDesc->mFormat = config.format;
3382                    AudioParameter outputCmd = AudioParameter();
3383                    outputCmd.addInt(String8("set_id"), 0);
3384                    mpClientInterface->setParameters(mPrimaryOutput, outputCmd.toString());
3385                    addOutput(mPrimaryOutput, outputDesc);
3386                }
3387            }
3388
3389
3390            mpClientInterface->setParameters(0, String8("test_cmd_policy="));
3391        }
3392    }
3393    return false;
3394}
3395
3396void AudioPolicyManager::exit()
3397{
3398    {
3399        AutoMutex _l(mLock);
3400        requestExit();
3401        mWaitWorkCV.signal();
3402    }
3403    requestExitAndWait();
3404}
3405
3406int AudioPolicyManager::testOutputIndex(audio_io_handle_t output)
3407{
3408    for (int i = 0; i < NUM_TEST_OUTPUTS; i++) {
3409        if (output == mTestOutputs[i]) return i;
3410    }
3411    return 0;
3412}
3413#endif //AUDIO_POLICY_TEST
3414
3415// ---
3416
3417void AudioPolicyManager::addOutput(audio_io_handle_t output, sp<AudioOutputDescriptor> outputDesc)
3418{
3419    outputDesc->mIoHandle = output;
3420    outputDesc->mId = nextUniqueId();
3421    mOutputs.add(output, outputDesc);
3422    nextAudioPortGeneration();
3423}
3424
3425void AudioPolicyManager::addInput(audio_io_handle_t input, sp<AudioInputDescriptor> inputDesc)
3426{
3427    inputDesc->mIoHandle = input;
3428    inputDesc->mId = nextUniqueId();
3429    mInputs.add(input, inputDesc);
3430    nextAudioPortGeneration();
3431}
3432
3433void AudioPolicyManager::findIoHandlesByAddress(sp<AudioOutputDescriptor> desc /*in*/,
3434        const String8 address /*in*/,
3435        SortedVector<audio_io_handle_t>& outputs /*out*/) {
3436    // look for a match on the given address on the addresses of the outputs:
3437    // find the address by finding the patch that maps to this output
3438    ssize_t patchIdx = mAudioPatches.indexOfKey(desc->mPatchHandle);
3439    //ALOGV("    inspecting output %d (patch %d) for supported device=0x%x",
3440    //        outputIdx, patchIdx,  desc->mProfile->mSupportedDevices.types());
3441    if (patchIdx >= 0) {
3442        const sp<AudioPatch> patchDesc = mAudioPatches.valueAt(patchIdx);
3443        const int numSinks = patchDesc->mPatch.num_sinks;
3444        for (ssize_t j=0; j < numSinks; j++) {
3445            if (patchDesc->mPatch.sinks[j].type == AUDIO_PORT_TYPE_DEVICE) {
3446                const char* patchAddr =
3447                        patchDesc->mPatch.sinks[j].ext.device.address;
3448                if (strncmp(patchAddr,
3449                        address.string(), AUDIO_DEVICE_MAX_ADDRESS_LEN) == 0) {
3450                    ALOGV("findIoHandlesByAddress(): adding opened output %d on same address %s",
3451                            desc->mIoHandle,  patchDesc->mPatch.sinks[j].ext.device.address);
3452                    outputs.add(desc->mIoHandle);
3453                    break;
3454                }
3455            }
3456        }
3457    }
3458}
3459
3460status_t AudioPolicyManager::checkOutputsForDevice(const sp<DeviceDescriptor> devDesc,
3461                                                       audio_policy_dev_state_t state,
3462                                                       SortedVector<audio_io_handle_t>& outputs,
3463                                                       const String8 address)
3464{
3465    audio_devices_t device = devDesc->mDeviceType;
3466    sp<AudioOutputDescriptor> desc;
3467    // erase all current sample rates, formats and channel masks
3468    devDesc->clearCapabilities();
3469
3470    if (state == AUDIO_POLICY_DEVICE_STATE_AVAILABLE) {
3471        // first list already open outputs that can be routed to this device
3472        for (size_t i = 0; i < mOutputs.size(); i++) {
3473            desc = mOutputs.valueAt(i);
3474            if (!desc->isDuplicated() && (desc->mProfile->mSupportedDevices.types() & device)) {
3475                if (!deviceDistinguishesOnAddress(device)) {
3476                    ALOGV("checkOutputsForDevice(): adding opened output %d", mOutputs.keyAt(i));
3477                    outputs.add(mOutputs.keyAt(i));
3478                } else {
3479                    ALOGV("  checking address match due to device 0x%x", device);
3480                    findIoHandlesByAddress(desc, address, outputs);
3481                }
3482            }
3483        }
3484        // then look for output profiles that can be routed to this device
3485        SortedVector< sp<IOProfile> > profiles;
3486        for (size_t i = 0; i < mHwModules.size(); i++)
3487        {
3488            if (mHwModules[i]->mHandle == 0) {
3489                continue;
3490            }
3491            for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
3492            {
3493                sp<IOProfile> profile = mHwModules[i]->mOutputProfiles[j];
3494                if (profile->mSupportedDevices.types() & device) {
3495                    if (!deviceDistinguishesOnAddress(device) ||
3496                            address == profile->mSupportedDevices[0]->mAddress) {
3497                        profiles.add(profile);
3498                        ALOGV("checkOutputsForDevice(): adding profile %zu from module %zu", j, i);
3499                    }
3500                }
3501            }
3502        }
3503
3504        ALOGV("  found %d profiles, %d outputs", profiles.size(), outputs.size());
3505
3506        if (profiles.isEmpty() && outputs.isEmpty()) {
3507            ALOGW("checkOutputsForDevice(): No output available for device %04x", device);
3508            return BAD_VALUE;
3509        }
3510
3511        // open outputs for matching profiles if needed. Direct outputs are also opened to
3512        // query for dynamic parameters and will be closed later by setDeviceConnectionState()
3513        for (ssize_t profile_index = 0; profile_index < (ssize_t)profiles.size(); profile_index++) {
3514            sp<IOProfile> profile = profiles[profile_index];
3515
3516            // nothing to do if one output is already opened for this profile
3517            size_t j;
3518            for (j = 0; j < outputs.size(); j++) {
3519                desc = mOutputs.valueFor(outputs.itemAt(j));
3520                if (!desc->isDuplicated() && desc->mProfile == profile) {
3521                    // matching profile: save the sample rates, format and channel masks supported
3522                    // by the profile in our device descriptor
3523                    devDesc->importAudioPort(profile);
3524                    break;
3525                }
3526            }
3527            if (j != outputs.size()) {
3528                continue;
3529            }
3530
3531            ALOGV("opening output for device %08x with params %s profile %p",
3532                                                      device, address.string(), profile.get());
3533            desc = new AudioOutputDescriptor(profile);
3534            desc->mDevice = device;
3535            audio_config_t config = AUDIO_CONFIG_INITIALIZER;
3536            config.sample_rate = desc->mSamplingRate;
3537            config.channel_mask = desc->mChannelMask;
3538            config.format = desc->mFormat;
3539            config.offload_info.sample_rate = desc->mSamplingRate;
3540            config.offload_info.channel_mask = desc->mChannelMask;
3541            config.offload_info.format = desc->mFormat;
3542            audio_io_handle_t output = AUDIO_IO_HANDLE_NONE;
3543            status_t status = mpClientInterface->openOutput(profile->mModule->mHandle,
3544                                                            &output,
3545                                                            &config,
3546                                                            &desc->mDevice,
3547                                                            address,
3548                                                            &desc->mLatency,
3549                                                            desc->mFlags);
3550            if (status == NO_ERROR) {
3551                desc->mSamplingRate = config.sample_rate;
3552                desc->mChannelMask = config.channel_mask;
3553                desc->mFormat = config.format;
3554
3555                // Here is where the out_set_parameters() for card & device gets called
3556                if (!address.isEmpty()) {
3557                    char *param = audio_device_address_to_parameter(device, address);
3558                    mpClientInterface->setParameters(output, String8(param));
3559                    free(param);
3560                }
3561
3562                // Here is where we step through and resolve any "dynamic" fields
3563                String8 reply;
3564                char *value;
3565                if (profile->mSamplingRates[0] == 0) {
3566                    reply = mpClientInterface->getParameters(output,
3567                                            String8(AUDIO_PARAMETER_STREAM_SUP_SAMPLING_RATES));
3568                    ALOGV("checkOutputsForDevice() supported sampling rates %s",
3569                              reply.string());
3570                    value = strpbrk((char *)reply.string(), "=");
3571                    if (value != NULL) {
3572                        profile->loadSamplingRates(value + 1);
3573                    }
3574                }
3575                if (profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) {
3576                    reply = mpClientInterface->getParameters(output,
3577                                                   String8(AUDIO_PARAMETER_STREAM_SUP_FORMATS));
3578                    ALOGV("checkOutputsForDevice() supported formats %s",
3579                              reply.string());
3580                    value = strpbrk((char *)reply.string(), "=");
3581                    if (value != NULL) {
3582                        profile->loadFormats(value + 1);
3583                    }
3584                }
3585                if (profile->mChannelMasks[0] == 0) {
3586                    reply = mpClientInterface->getParameters(output,
3587                                                  String8(AUDIO_PARAMETER_STREAM_SUP_CHANNELS));
3588                    ALOGV("checkOutputsForDevice() supported channel masks %s",
3589                              reply.string());
3590                    value = strpbrk((char *)reply.string(), "=");
3591                    if (value != NULL) {
3592                        profile->loadOutChannels(value + 1);
3593                    }
3594                }
3595                if (((profile->mSamplingRates[0] == 0) &&
3596                         (profile->mSamplingRates.size() < 2)) ||
3597                     ((profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) &&
3598                         (profile->mFormats.size() < 2)) ||
3599                     ((profile->mChannelMasks[0] == 0) &&
3600                         (profile->mChannelMasks.size() < 2))) {
3601                    ALOGW("checkOutputsForDevice() missing param");
3602                    mpClientInterface->closeOutput(output);
3603                    output = AUDIO_IO_HANDLE_NONE;
3604                } else if (profile->mSamplingRates[0] == 0 || profile->mFormats[0] == 0 ||
3605                            profile->mChannelMasks[0] == 0) {
3606                    mpClientInterface->closeOutput(output);
3607                    config.sample_rate = profile->pickSamplingRate();
3608                    config.channel_mask = profile->pickChannelMask();
3609                    config.format = profile->pickFormat();
3610                    config.offload_info.sample_rate = config.sample_rate;
3611                    config.offload_info.channel_mask = config.channel_mask;
3612                    config.offload_info.format = config.format;
3613                    status = mpClientInterface->openOutput(profile->mModule->mHandle,
3614                                                           &output,
3615                                                           &config,
3616                                                           &desc->mDevice,
3617                                                           address,
3618                                                           &desc->mLatency,
3619                                                           desc->mFlags);
3620                    if (status == NO_ERROR) {
3621                        desc->mSamplingRate = config.sample_rate;
3622                        desc->mChannelMask = config.channel_mask;
3623                        desc->mFormat = config.format;
3624                    } else {
3625                        output = AUDIO_IO_HANDLE_NONE;
3626                    }
3627                }
3628
3629                if (output != AUDIO_IO_HANDLE_NONE) {
3630                    addOutput(output, desc);
3631                    if (deviceDistinguishesOnAddress(device) && address != "0") {
3632                        ssize_t index = mPolicyMixes.indexOfKey(address);
3633                        if (index >= 0) {
3634                            mPolicyMixes[index]->mOutput = desc;
3635                            desc->mPolicyMix = &mPolicyMixes[index]->mMix;
3636                        } else {
3637                            ALOGE("checkOutputsForDevice() cannot find policy for address %s",
3638                                  address.string());
3639                        }
3640                    } else if ((desc->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) == 0) {
3641                        // no duplicated output for direct outputs and
3642                        // outputs used by dynamic policy mixes
3643                        audio_io_handle_t duplicatedOutput = AUDIO_IO_HANDLE_NONE;
3644
3645                        // set initial stream volume for device
3646                        applyStreamVolumes(output, device, 0, true);
3647
3648                        //TODO: configure audio effect output stage here
3649
3650                        // open a duplicating output thread for the new output and the primary output
3651                        duplicatedOutput = mpClientInterface->openDuplicateOutput(output,
3652                                                                                  mPrimaryOutput);
3653                        if (duplicatedOutput != AUDIO_IO_HANDLE_NONE) {
3654                            // add duplicated output descriptor
3655                            sp<AudioOutputDescriptor> dupOutputDesc =
3656                                    new AudioOutputDescriptor(NULL);
3657                            dupOutputDesc->mOutput1 = mOutputs.valueFor(mPrimaryOutput);
3658                            dupOutputDesc->mOutput2 = mOutputs.valueFor(output);
3659                            dupOutputDesc->mSamplingRate = desc->mSamplingRate;
3660                            dupOutputDesc->mFormat = desc->mFormat;
3661                            dupOutputDesc->mChannelMask = desc->mChannelMask;
3662                            dupOutputDesc->mLatency = desc->mLatency;
3663                            addOutput(duplicatedOutput, dupOutputDesc);
3664                            applyStreamVolumes(duplicatedOutput, device, 0, true);
3665                        } else {
3666                            ALOGW("checkOutputsForDevice() could not open dup output for %d and %d",
3667                                    mPrimaryOutput, output);
3668                            mpClientInterface->closeOutput(output);
3669                            mOutputs.removeItem(output);
3670                            nextAudioPortGeneration();
3671                            output = AUDIO_IO_HANDLE_NONE;
3672                        }
3673                    }
3674                }
3675            } else {
3676                output = AUDIO_IO_HANDLE_NONE;
3677            }
3678            if (output == AUDIO_IO_HANDLE_NONE) {
3679                ALOGW("checkOutputsForDevice() could not open output for device %x", device);
3680                profiles.removeAt(profile_index);
3681                profile_index--;
3682            } else {
3683                outputs.add(output);
3684                devDesc->importAudioPort(profile);
3685
3686                if (deviceDistinguishesOnAddress(device)) {
3687                    ALOGV("checkOutputsForDevice(): setOutputDevice(dev=0x%x, addr=%s)",
3688                            device, address.string());
3689                    setOutputDevice(output, device, true/*force*/, 0/*delay*/,
3690                            NULL/*patch handle*/, address.string());
3691                }
3692                ALOGV("checkOutputsForDevice(): adding output %d", output);
3693            }
3694        }
3695
3696        if (profiles.isEmpty()) {
3697            ALOGW("checkOutputsForDevice(): No output available for device %04x", device);
3698            return BAD_VALUE;
3699        }
3700    } else { // Disconnect
3701        // check if one opened output is not needed any more after disconnecting one device
3702        for (size_t i = 0; i < mOutputs.size(); i++) {
3703            desc = mOutputs.valueAt(i);
3704            if (!desc->isDuplicated()) {
3705                // exact match on device
3706                if (deviceDistinguishesOnAddress(device) &&
3707                        (desc->mProfile->mSupportedDevices.types() == device)) {
3708                    findIoHandlesByAddress(desc, address, outputs);
3709                } else if (!(desc->mProfile->mSupportedDevices.types()
3710                        & mAvailableOutputDevices.types())) {
3711                    ALOGV("checkOutputsForDevice(): disconnecting adding output %d",
3712                            mOutputs.keyAt(i));
3713                    outputs.add(mOutputs.keyAt(i));
3714                }
3715            }
3716        }
3717        // Clear any profiles associated with the disconnected device.
3718        for (size_t i = 0; i < mHwModules.size(); i++)
3719        {
3720            if (mHwModules[i]->mHandle == 0) {
3721                continue;
3722            }
3723            for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
3724            {
3725                sp<IOProfile> profile = mHwModules[i]->mOutputProfiles[j];
3726                if (profile->mSupportedDevices.types() & device) {
3727                    ALOGV("checkOutputsForDevice(): "
3728                            "clearing direct output profile %zu on module %zu", j, i);
3729                    if (profile->mSamplingRates[0] == 0) {
3730                        profile->mSamplingRates.clear();
3731                        profile->mSamplingRates.add(0);
3732                    }
3733                    if (profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) {
3734                        profile->mFormats.clear();
3735                        profile->mFormats.add(AUDIO_FORMAT_DEFAULT);
3736                    }
3737                    if (profile->mChannelMasks[0] == 0) {
3738                        profile->mChannelMasks.clear();
3739                        profile->mChannelMasks.add(0);
3740                    }
3741                }
3742            }
3743        }
3744    }
3745    return NO_ERROR;
3746}
3747
3748status_t AudioPolicyManager::checkInputsForDevice(audio_devices_t device,
3749                                                      audio_policy_dev_state_t state,
3750                                                      SortedVector<audio_io_handle_t>& inputs,
3751                                                      const String8 address)
3752{
3753    sp<AudioInputDescriptor> desc;
3754    if (state == AUDIO_POLICY_DEVICE_STATE_AVAILABLE) {
3755        // first list already open inputs that can be routed to this device
3756        for (size_t input_index = 0; input_index < mInputs.size(); input_index++) {
3757            desc = mInputs.valueAt(input_index);
3758            if (desc->mProfile->mSupportedDevices.types() & (device & ~AUDIO_DEVICE_BIT_IN)) {
3759                ALOGV("checkInputsForDevice(): adding opened input %d", mInputs.keyAt(input_index));
3760               inputs.add(mInputs.keyAt(input_index));
3761            }
3762        }
3763
3764        // then look for input profiles that can be routed to this device
3765        SortedVector< sp<IOProfile> > profiles;
3766        for (size_t module_idx = 0; module_idx < mHwModules.size(); module_idx++)
3767        {
3768            if (mHwModules[module_idx]->mHandle == 0) {
3769                continue;
3770            }
3771            for (size_t profile_index = 0;
3772                 profile_index < mHwModules[module_idx]->mInputProfiles.size();
3773                 profile_index++)
3774            {
3775                sp<IOProfile> profile = mHwModules[module_idx]->mInputProfiles[profile_index];
3776
3777                if (profile->mSupportedDevices.types() & (device & ~AUDIO_DEVICE_BIT_IN)) {
3778                    if (!deviceDistinguishesOnAddress(device) ||
3779                            address == profile->mSupportedDevices[0]->mAddress) {
3780                        profiles.add(profile);
3781                        ALOGV("checkInputsForDevice(): adding profile %zu from module %zu",
3782                              profile_index, module_idx);
3783                    }
3784                }
3785            }
3786        }
3787
3788        if (profiles.isEmpty() && inputs.isEmpty()) {
3789            ALOGW("checkInputsForDevice(): No input available for device 0x%X", device);
3790            return BAD_VALUE;
3791        }
3792
3793        // open inputs for matching profiles if needed. Direct inputs are also opened to
3794        // query for dynamic parameters and will be closed later by setDeviceConnectionState()
3795        for (ssize_t profile_index = 0; profile_index < (ssize_t)profiles.size(); profile_index++) {
3796
3797            sp<IOProfile> profile = profiles[profile_index];
3798            // nothing to do if one input is already opened for this profile
3799            size_t input_index;
3800            for (input_index = 0; input_index < mInputs.size(); input_index++) {
3801                desc = mInputs.valueAt(input_index);
3802                if (desc->mProfile == profile) {
3803                    break;
3804                }
3805            }
3806            if (input_index != mInputs.size()) {
3807                continue;
3808            }
3809
3810            ALOGV("opening input for device 0x%X with params %s", device, address.string());
3811            desc = new AudioInputDescriptor(profile);
3812            desc->mDevice = device;
3813            audio_config_t config = AUDIO_CONFIG_INITIALIZER;
3814            config.sample_rate = desc->mSamplingRate;
3815            config.channel_mask = desc->mChannelMask;
3816            config.format = desc->mFormat;
3817            audio_io_handle_t input = AUDIO_IO_HANDLE_NONE;
3818            status_t status = mpClientInterface->openInput(profile->mModule->mHandle,
3819                                                           &input,
3820                                                           &config,
3821                                                           &desc->mDevice,
3822                                                           address,
3823                                                           AUDIO_SOURCE_MIC,
3824                                                           AUDIO_INPUT_FLAG_NONE /*FIXME*/);
3825
3826            if (status == NO_ERROR) {
3827                desc->mSamplingRate = config.sample_rate;
3828                desc->mChannelMask = config.channel_mask;
3829                desc->mFormat = config.format;
3830
3831                if (!address.isEmpty()) {
3832                    char *param = audio_device_address_to_parameter(device, address);
3833                    mpClientInterface->setParameters(input, String8(param));
3834                    free(param);
3835                }
3836
3837                // Here is where we step through and resolve any "dynamic" fields
3838                String8 reply;
3839                char *value;
3840                if (profile->mSamplingRates[0] == 0) {
3841                    reply = mpClientInterface->getParameters(input,
3842                                            String8(AUDIO_PARAMETER_STREAM_SUP_SAMPLING_RATES));
3843                    ALOGV("checkInputsForDevice() direct input sup sampling rates %s",
3844                              reply.string());
3845                    value = strpbrk((char *)reply.string(), "=");
3846                    if (value != NULL) {
3847                        profile->loadSamplingRates(value + 1);
3848                    }
3849                }
3850                if (profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) {
3851                    reply = mpClientInterface->getParameters(input,
3852                                                   String8(AUDIO_PARAMETER_STREAM_SUP_FORMATS));
3853                    ALOGV("checkInputsForDevice() direct input sup formats %s", reply.string());
3854                    value = strpbrk((char *)reply.string(), "=");
3855                    if (value != NULL) {
3856                        profile->loadFormats(value + 1);
3857                    }
3858                }
3859                if (profile->mChannelMasks[0] == 0) {
3860                    reply = mpClientInterface->getParameters(input,
3861                                                  String8(AUDIO_PARAMETER_STREAM_SUP_CHANNELS));
3862                    ALOGV("checkInputsForDevice() direct input sup channel masks %s",
3863                              reply.string());
3864                    value = strpbrk((char *)reply.string(), "=");
3865                    if (value != NULL) {
3866                        profile->loadInChannels(value + 1);
3867                    }
3868                }
3869                if (((profile->mSamplingRates[0] == 0) && (profile->mSamplingRates.size() < 2)) ||
3870                     ((profile->mFormats[0] == 0) && (profile->mFormats.size() < 2)) ||
3871                     ((profile->mChannelMasks[0] == 0) && (profile->mChannelMasks.size() < 2))) {
3872                    ALOGW("checkInputsForDevice() direct input missing param");
3873                    mpClientInterface->closeInput(input);
3874                    input = AUDIO_IO_HANDLE_NONE;
3875                }
3876
3877                if (input != 0) {
3878                    addInput(input, desc);
3879                }
3880            } // endif input != 0
3881
3882            if (input == AUDIO_IO_HANDLE_NONE) {
3883                ALOGW("checkInputsForDevice() could not open input for device 0x%X", device);
3884                profiles.removeAt(profile_index);
3885                profile_index--;
3886            } else {
3887                inputs.add(input);
3888                ALOGV("checkInputsForDevice(): adding input %d", input);
3889            }
3890        } // end scan profiles
3891
3892        if (profiles.isEmpty()) {
3893            ALOGW("checkInputsForDevice(): No input available for device 0x%X", device);
3894            return BAD_VALUE;
3895        }
3896    } else {
3897        // Disconnect
3898        // check if one opened input is not needed any more after disconnecting one device
3899        for (size_t input_index = 0; input_index < mInputs.size(); input_index++) {
3900            desc = mInputs.valueAt(input_index);
3901            if (!(desc->mProfile->mSupportedDevices.types() & mAvailableInputDevices.types() &
3902                    ~AUDIO_DEVICE_BIT_IN)) {
3903                ALOGV("checkInputsForDevice(): disconnecting adding input %d",
3904                      mInputs.keyAt(input_index));
3905                inputs.add(mInputs.keyAt(input_index));
3906            }
3907        }
3908        // Clear any profiles associated with the disconnected device.
3909        for (size_t module_index = 0; module_index < mHwModules.size(); module_index++) {
3910            if (mHwModules[module_index]->mHandle == 0) {
3911                continue;
3912            }
3913            for (size_t profile_index = 0;
3914                 profile_index < mHwModules[module_index]->mInputProfiles.size();
3915                 profile_index++) {
3916                sp<IOProfile> profile = mHwModules[module_index]->mInputProfiles[profile_index];
3917                if (profile->mSupportedDevices.types() & device & ~AUDIO_DEVICE_BIT_IN) {
3918                    ALOGV("checkInputsForDevice(): clearing direct input profile %zu on module %zu",
3919                          profile_index, module_index);
3920                    if (profile->mSamplingRates[0] == 0) {
3921                        profile->mSamplingRates.clear();
3922                        profile->mSamplingRates.add(0);
3923                    }
3924                    if (profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) {
3925                        profile->mFormats.clear();
3926                        profile->mFormats.add(AUDIO_FORMAT_DEFAULT);
3927                    }
3928                    if (profile->mChannelMasks[0] == 0) {
3929                        profile->mChannelMasks.clear();
3930                        profile->mChannelMasks.add(0);
3931                    }
3932                }
3933            }
3934        }
3935    } // end disconnect
3936
3937    return NO_ERROR;
3938}
3939
3940
3941void AudioPolicyManager::closeOutput(audio_io_handle_t output)
3942{
3943    ALOGV("closeOutput(%d)", output);
3944
3945    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
3946    if (outputDesc == NULL) {
3947        ALOGW("closeOutput() unknown output %d", output);
3948        return;
3949    }
3950
3951    for (size_t i = 0; i < mPolicyMixes.size(); i++) {
3952        if (mPolicyMixes[i]->mOutput == outputDesc) {
3953            mPolicyMixes[i]->mOutput.clear();
3954        }
3955    }
3956
3957    // look for duplicated outputs connected to the output being removed.
3958    for (size_t i = 0; i < mOutputs.size(); i++) {
3959        sp<AudioOutputDescriptor> dupOutputDesc = mOutputs.valueAt(i);
3960        if (dupOutputDesc->isDuplicated() &&
3961                (dupOutputDesc->mOutput1 == outputDesc ||
3962                dupOutputDesc->mOutput2 == outputDesc)) {
3963            sp<AudioOutputDescriptor> outputDesc2;
3964            if (dupOutputDesc->mOutput1 == outputDesc) {
3965                outputDesc2 = dupOutputDesc->mOutput2;
3966            } else {
3967                outputDesc2 = dupOutputDesc->mOutput1;
3968            }
3969            // As all active tracks on duplicated output will be deleted,
3970            // and as they were also referenced on the other output, the reference
3971            // count for their stream type must be adjusted accordingly on
3972            // the other output.
3973            for (int j = 0; j < AUDIO_STREAM_CNT; j++) {
3974                int refCount = dupOutputDesc->mRefCount[j];
3975                outputDesc2->changeRefCount((audio_stream_type_t)j,-refCount);
3976            }
3977            audio_io_handle_t duplicatedOutput = mOutputs.keyAt(i);
3978            ALOGV("closeOutput() closing also duplicated output %d", duplicatedOutput);
3979
3980            mpClientInterface->closeOutput(duplicatedOutput);
3981            mOutputs.removeItem(duplicatedOutput);
3982        }
3983    }
3984
3985    nextAudioPortGeneration();
3986
3987    ssize_t index = mAudioPatches.indexOfKey(outputDesc->mPatchHandle);
3988    if (index >= 0) {
3989        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
3990        status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, 0);
3991        mAudioPatches.removeItemsAt(index);
3992        mpClientInterface->onAudioPatchListUpdate();
3993    }
3994
3995    AudioParameter param;
3996    param.add(String8("closing"), String8("true"));
3997    mpClientInterface->setParameters(output, param.toString());
3998
3999    mpClientInterface->closeOutput(output);
4000    mOutputs.removeItem(output);
4001    mPreviousOutputs = mOutputs;
4002}
4003
4004void AudioPolicyManager::closeInput(audio_io_handle_t input)
4005{
4006    ALOGV("closeInput(%d)", input);
4007
4008    sp<AudioInputDescriptor> inputDesc = mInputs.valueFor(input);
4009    if (inputDesc == NULL) {
4010        ALOGW("closeInput() unknown input %d", input);
4011        return;
4012    }
4013
4014    nextAudioPortGeneration();
4015
4016    ssize_t index = mAudioPatches.indexOfKey(inputDesc->mPatchHandle);
4017    if (index >= 0) {
4018        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
4019        status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, 0);
4020        mAudioPatches.removeItemsAt(index);
4021        mpClientInterface->onAudioPatchListUpdate();
4022    }
4023
4024    mpClientInterface->closeInput(input);
4025    mInputs.removeItem(input);
4026}
4027
4028SortedVector<audio_io_handle_t> AudioPolicyManager::getOutputsForDevice(audio_devices_t device,
4029                        DefaultKeyedVector<audio_io_handle_t, sp<AudioOutputDescriptor> > openOutputs)
4030{
4031    SortedVector<audio_io_handle_t> outputs;
4032
4033    ALOGVV("getOutputsForDevice() device %04x", device);
4034    for (size_t i = 0; i < openOutputs.size(); i++) {
4035        ALOGVV("output %d isDuplicated=%d device=%04x",
4036                i, openOutputs.valueAt(i)->isDuplicated(), openOutputs.valueAt(i)->supportedDevices());
4037        if ((device & openOutputs.valueAt(i)->supportedDevices()) == device) {
4038            ALOGVV("getOutputsForDevice() found output %d", openOutputs.keyAt(i));
4039            outputs.add(openOutputs.keyAt(i));
4040        }
4041    }
4042    return outputs;
4043}
4044
4045bool AudioPolicyManager::vectorsEqual(SortedVector<audio_io_handle_t>& outputs1,
4046                                   SortedVector<audio_io_handle_t>& outputs2)
4047{
4048    if (outputs1.size() != outputs2.size()) {
4049        return false;
4050    }
4051    for (size_t i = 0; i < outputs1.size(); i++) {
4052        if (outputs1[i] != outputs2[i]) {
4053            return false;
4054        }
4055    }
4056    return true;
4057}
4058
4059void AudioPolicyManager::checkOutputForStrategy(routing_strategy strategy)
4060{
4061    audio_devices_t oldDevice = getDeviceForStrategy(strategy, true /*fromCache*/);
4062    audio_devices_t newDevice = getDeviceForStrategy(strategy, false /*fromCache*/);
4063    SortedVector<audio_io_handle_t> srcOutputs = getOutputsForDevice(oldDevice, mPreviousOutputs);
4064    SortedVector<audio_io_handle_t> dstOutputs = getOutputsForDevice(newDevice, mOutputs);
4065
4066    // also take into account external policy-related changes: add all outputs which are
4067    // associated with policies in the "before" and "after" output vectors
4068    ALOGVV("checkOutputForStrategy(): policy related outputs");
4069    for (size_t i = 0 ; i < mPreviousOutputs.size() ; i++) {
4070        const sp<AudioOutputDescriptor> desc = mPreviousOutputs.valueAt(i);
4071        if (desc != 0 && desc->mPolicyMix != NULL) {
4072            srcOutputs.add(desc->mIoHandle);
4073            ALOGVV(" previous outputs: adding %d", desc->mIoHandle);
4074        }
4075    }
4076    for (size_t i = 0 ; i < mOutputs.size() ; i++) {
4077        const sp<AudioOutputDescriptor> desc = mOutputs.valueAt(i);
4078        if (desc != 0 && desc->mPolicyMix != NULL) {
4079            dstOutputs.add(desc->mIoHandle);
4080            ALOGVV(" new outputs: adding %d", desc->mIoHandle);
4081        }
4082    }
4083
4084    if (!vectorsEqual(srcOutputs,dstOutputs)) {
4085        ALOGV("checkOutputForStrategy() strategy %d, moving from output %d to output %d",
4086              strategy, srcOutputs[0], dstOutputs[0]);
4087        // mute strategy while moving tracks from one output to another
4088        for (size_t i = 0; i < srcOutputs.size(); i++) {
4089            sp<AudioOutputDescriptor> desc = mOutputs.valueFor(srcOutputs[i]);
4090            if (desc->isStrategyActive(strategy)) {
4091                setStrategyMute(strategy, true, srcOutputs[i]);
4092                setStrategyMute(strategy, false, srcOutputs[i], MUTE_TIME_MS, newDevice);
4093            }
4094        }
4095
4096        // Move effects associated to this strategy from previous output to new output
4097        if (strategy == STRATEGY_MEDIA) {
4098            audio_io_handle_t fxOutput = selectOutputForEffects(dstOutputs);
4099            SortedVector<audio_io_handle_t> moved;
4100            for (size_t i = 0; i < mEffects.size(); i++) {
4101                sp<EffectDescriptor> effectDesc = mEffects.valueAt(i);
4102                if (effectDesc->mSession == AUDIO_SESSION_OUTPUT_MIX &&
4103                        effectDesc->mIo != fxOutput) {
4104                    if (moved.indexOf(effectDesc->mIo) < 0) {
4105                        ALOGV("checkOutputForStrategy() moving effect %d to output %d",
4106                              mEffects.keyAt(i), fxOutput);
4107                        mpClientInterface->moveEffects(AUDIO_SESSION_OUTPUT_MIX, effectDesc->mIo,
4108                                                       fxOutput);
4109                        moved.add(effectDesc->mIo);
4110                    }
4111                    effectDesc->mIo = fxOutput;
4112                }
4113            }
4114        }
4115        // Move tracks associated to this strategy from previous output to new output
4116        for (int i = 0; i < AUDIO_STREAM_CNT; i++) {
4117            if (i == AUDIO_STREAM_PATCH) {
4118                continue;
4119            }
4120            if (getStrategy((audio_stream_type_t)i) == strategy) {
4121                mpClientInterface->invalidateStream((audio_stream_type_t)i);
4122            }
4123        }
4124    }
4125}
4126
4127void AudioPolicyManager::checkOutputForAllStrategies()
4128{
4129    if (mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] == AUDIO_POLICY_FORCE_SYSTEM_ENFORCED)
4130        checkOutputForStrategy(STRATEGY_ENFORCED_AUDIBLE);
4131    checkOutputForStrategy(STRATEGY_PHONE);
4132    if (mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] != AUDIO_POLICY_FORCE_SYSTEM_ENFORCED)
4133        checkOutputForStrategy(STRATEGY_ENFORCED_AUDIBLE);
4134    checkOutputForStrategy(STRATEGY_SONIFICATION);
4135    checkOutputForStrategy(STRATEGY_SONIFICATION_RESPECTFUL);
4136    checkOutputForStrategy(STRATEGY_ACCESSIBILITY);
4137    checkOutputForStrategy(STRATEGY_MEDIA);
4138    checkOutputForStrategy(STRATEGY_DTMF);
4139    checkOutputForStrategy(STRATEGY_REROUTING);
4140}
4141
4142audio_io_handle_t AudioPolicyManager::getA2dpOutput()
4143{
4144    for (size_t i = 0; i < mOutputs.size(); i++) {
4145        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(i);
4146        if (!outputDesc->isDuplicated() && outputDesc->device() & AUDIO_DEVICE_OUT_ALL_A2DP) {
4147            return mOutputs.keyAt(i);
4148        }
4149    }
4150
4151    return 0;
4152}
4153
4154void AudioPolicyManager::checkA2dpSuspend()
4155{
4156    audio_io_handle_t a2dpOutput = getA2dpOutput();
4157    if (a2dpOutput == 0) {
4158        mA2dpSuspended = false;
4159        return;
4160    }
4161
4162    bool isScoConnected =
4163            ((mAvailableInputDevices.types() & AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET &
4164                    ~AUDIO_DEVICE_BIT_IN) != 0) ||
4165            ((mAvailableOutputDevices.types() & AUDIO_DEVICE_OUT_ALL_SCO) != 0);
4166    // suspend A2DP output if:
4167    //      (NOT already suspended) &&
4168    //      ((SCO device is connected &&
4169    //       (forced usage for communication || for record is SCO))) ||
4170    //      (phone state is ringing || in call)
4171    //
4172    // restore A2DP output if:
4173    //      (Already suspended) &&
4174    //      ((SCO device is NOT connected ||
4175    //       (forced usage NOT for communication && NOT for record is SCO))) &&
4176    //      (phone state is NOT ringing && NOT in call)
4177    //
4178    if (mA2dpSuspended) {
4179        if ((!isScoConnected ||
4180             ((mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION] != AUDIO_POLICY_FORCE_BT_SCO) &&
4181              (mForceUse[AUDIO_POLICY_FORCE_FOR_RECORD] != AUDIO_POLICY_FORCE_BT_SCO))) &&
4182             ((mPhoneState != AUDIO_MODE_IN_CALL) &&
4183              (mPhoneState != AUDIO_MODE_RINGTONE))) {
4184
4185            mpClientInterface->restoreOutput(a2dpOutput);
4186            mA2dpSuspended = false;
4187        }
4188    } else {
4189        if ((isScoConnected &&
4190             ((mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION] == AUDIO_POLICY_FORCE_BT_SCO) ||
4191              (mForceUse[AUDIO_POLICY_FORCE_FOR_RECORD] == AUDIO_POLICY_FORCE_BT_SCO))) ||
4192             ((mPhoneState == AUDIO_MODE_IN_CALL) ||
4193              (mPhoneState == AUDIO_MODE_RINGTONE))) {
4194
4195            mpClientInterface->suspendOutput(a2dpOutput);
4196            mA2dpSuspended = true;
4197        }
4198    }
4199}
4200
4201audio_devices_t AudioPolicyManager::getNewOutputDevice(audio_io_handle_t output, bool fromCache)
4202{
4203    audio_devices_t device = AUDIO_DEVICE_NONE;
4204
4205    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
4206
4207    ssize_t index = mAudioPatches.indexOfKey(outputDesc->mPatchHandle);
4208    if (index >= 0) {
4209        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
4210        if (patchDesc->mUid != mUidCached) {
4211            ALOGV("getNewOutputDevice() device %08x forced by patch %d",
4212                  outputDesc->device(), outputDesc->mPatchHandle);
4213            return outputDesc->device();
4214        }
4215    }
4216
4217    // check the following by order of priority to request a routing change if necessary:
4218    // 1: the strategy enforced audible is active and enforced on the output:
4219    //      use device for strategy enforced audible
4220    // 2: we are in call or the strategy phone is active on the output:
4221    //      use device for strategy phone
4222    // 3: the strategy for enforced audible is active but not enforced on the output:
4223    //      use the device for strategy enforced audible
4224    // 4: the strategy sonification is active on the output:
4225    //      use device for strategy sonification
4226    // 5: the strategy "respectful" sonification is active on the output:
4227    //      use device for strategy "respectful" sonification
4228    // 6: the strategy accessibility is active on the output:
4229    //      use device for strategy accessibility
4230    // 7: the strategy media is active on the output:
4231    //      use device for strategy media
4232    // 8: the strategy DTMF is active on the output:
4233    //      use device for strategy DTMF
4234    // 9: the strategy for beacon, a.k.a. "transmitted through speaker" is active on the output:
4235    //      use device for strategy t-t-s
4236    if (outputDesc->isStrategyActive(STRATEGY_ENFORCED_AUDIBLE) &&
4237        mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] == AUDIO_POLICY_FORCE_SYSTEM_ENFORCED) {
4238        device = getDeviceForStrategy(STRATEGY_ENFORCED_AUDIBLE, fromCache);
4239    } else if (isInCall() ||
4240                    outputDesc->isStrategyActive(STRATEGY_PHONE)) {
4241        device = getDeviceForStrategy(STRATEGY_PHONE, fromCache);
4242    } else if (outputDesc->isStrategyActive(STRATEGY_ENFORCED_AUDIBLE)) {
4243        device = getDeviceForStrategy(STRATEGY_ENFORCED_AUDIBLE, fromCache);
4244    } else if (outputDesc->isStrategyActive(STRATEGY_SONIFICATION)) {
4245        device = getDeviceForStrategy(STRATEGY_SONIFICATION, fromCache);
4246    } else if (outputDesc->isStrategyActive(STRATEGY_SONIFICATION_RESPECTFUL)) {
4247        device = getDeviceForStrategy(STRATEGY_SONIFICATION_RESPECTFUL, fromCache);
4248    } else if (outputDesc->isStrategyActive(STRATEGY_ACCESSIBILITY)) {
4249        device = getDeviceForStrategy(STRATEGY_ACCESSIBILITY, fromCache);
4250    } else if (outputDesc->isStrategyActive(STRATEGY_MEDIA)) {
4251        device = getDeviceForStrategy(STRATEGY_MEDIA, fromCache);
4252    } else if (outputDesc->isStrategyActive(STRATEGY_DTMF)) {
4253        device = getDeviceForStrategy(STRATEGY_DTMF, fromCache);
4254    } else if (outputDesc->isStrategyActive(STRATEGY_TRANSMITTED_THROUGH_SPEAKER)) {
4255        device = getDeviceForStrategy(STRATEGY_TRANSMITTED_THROUGH_SPEAKER, fromCache);
4256    } else if (outputDesc->isStrategyActive(STRATEGY_REROUTING)) {
4257        device = getDeviceForStrategy(STRATEGY_REROUTING, fromCache);
4258    }
4259
4260    ALOGV("getNewOutputDevice() selected device %x", device);
4261    return device;
4262}
4263
4264audio_devices_t AudioPolicyManager::getNewInputDevice(audio_io_handle_t input)
4265{
4266    sp<AudioInputDescriptor> inputDesc = mInputs.valueFor(input);
4267
4268    ssize_t index = mAudioPatches.indexOfKey(inputDesc->mPatchHandle);
4269    if (index >= 0) {
4270        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
4271        if (patchDesc->mUid != mUidCached) {
4272            ALOGV("getNewInputDevice() device %08x forced by patch %d",
4273                  inputDesc->mDevice, inputDesc->mPatchHandle);
4274            return inputDesc->mDevice;
4275        }
4276    }
4277
4278    audio_devices_t device = getDeviceAndMixForInputSource(inputDesc->mInputSource);
4279
4280    ALOGV("getNewInputDevice() selected device %x", device);
4281    return device;
4282}
4283
4284uint32_t AudioPolicyManager::getStrategyForStream(audio_stream_type_t stream) {
4285    return (uint32_t)getStrategy(stream);
4286}
4287
4288audio_devices_t AudioPolicyManager::getDevicesForStream(audio_stream_type_t stream) {
4289    // By checking the range of stream before calling getStrategy, we avoid
4290    // getStrategy's behavior for invalid streams.  getStrategy would do a ALOGE
4291    // and then return STRATEGY_MEDIA, but we want to return the empty set.
4292    if (stream < (audio_stream_type_t) 0 || stream >= AUDIO_STREAM_PUBLIC_CNT) {
4293        return AUDIO_DEVICE_NONE;
4294    }
4295    audio_devices_t devices;
4296    AudioPolicyManager::routing_strategy strategy = getStrategy(stream);
4297    devices = getDeviceForStrategy(strategy, true /*fromCache*/);
4298    SortedVector<audio_io_handle_t> outputs = getOutputsForDevice(devices, mOutputs);
4299    for (size_t i = 0; i < outputs.size(); i++) {
4300        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(outputs[i]);
4301        if (outputDesc->isStrategyActive(strategy)) {
4302            devices = outputDesc->device();
4303            break;
4304        }
4305    }
4306
4307    /*Filter SPEAKER_SAFE out of results, as AudioService doesn't know about it
4308      and doesn't really need to.*/
4309    if (devices & AUDIO_DEVICE_OUT_SPEAKER_SAFE) {
4310        devices |= AUDIO_DEVICE_OUT_SPEAKER;
4311        devices &= ~AUDIO_DEVICE_OUT_SPEAKER_SAFE;
4312    }
4313
4314    return devices;
4315}
4316
4317AudioPolicyManager::routing_strategy AudioPolicyManager::getStrategy(
4318        audio_stream_type_t stream) {
4319
4320    ALOG_ASSERT(stream != AUDIO_STREAM_PATCH,"getStrategy() called for AUDIO_STREAM_PATCH");
4321
4322    // stream to strategy mapping
4323    switch (stream) {
4324    case AUDIO_STREAM_VOICE_CALL:
4325    case AUDIO_STREAM_BLUETOOTH_SCO:
4326        return STRATEGY_PHONE;
4327    case AUDIO_STREAM_RING:
4328    case AUDIO_STREAM_ALARM:
4329        return STRATEGY_SONIFICATION;
4330    case AUDIO_STREAM_NOTIFICATION:
4331        return STRATEGY_SONIFICATION_RESPECTFUL;
4332    case AUDIO_STREAM_DTMF:
4333        return STRATEGY_DTMF;
4334    default:
4335        ALOGE("unknown stream type %d", stream);
4336    case AUDIO_STREAM_SYSTEM:
4337        // NOTE: SYSTEM stream uses MEDIA strategy because muting music and switching outputs
4338        // while key clicks are played produces a poor result
4339    case AUDIO_STREAM_MUSIC:
4340        return STRATEGY_MEDIA;
4341    case AUDIO_STREAM_ENFORCED_AUDIBLE:
4342        return STRATEGY_ENFORCED_AUDIBLE;
4343    case AUDIO_STREAM_TTS:
4344        return STRATEGY_TRANSMITTED_THROUGH_SPEAKER;
4345    case AUDIO_STREAM_ACCESSIBILITY:
4346        return STRATEGY_ACCESSIBILITY;
4347    case AUDIO_STREAM_REROUTING:
4348        return STRATEGY_REROUTING;
4349    }
4350}
4351
4352uint32_t AudioPolicyManager::getStrategyForAttr(const audio_attributes_t *attr) {
4353    // flags to strategy mapping
4354    if ((attr->flags & AUDIO_FLAG_BEACON) == AUDIO_FLAG_BEACON) {
4355        return (uint32_t) STRATEGY_TRANSMITTED_THROUGH_SPEAKER;
4356    }
4357    if ((attr->flags & AUDIO_FLAG_AUDIBILITY_ENFORCED) == AUDIO_FLAG_AUDIBILITY_ENFORCED) {
4358        return (uint32_t) STRATEGY_ENFORCED_AUDIBLE;
4359    }
4360
4361    // usage to strategy mapping
4362    switch (attr->usage) {
4363    case AUDIO_USAGE_ASSISTANCE_ACCESSIBILITY:
4364        if (isStreamActive(AUDIO_STREAM_RING) || isStreamActive(AUDIO_STREAM_ALARM)) {
4365            return (uint32_t) STRATEGY_SONIFICATION;
4366        }
4367        if (isInCall()) {
4368            return (uint32_t) STRATEGY_PHONE;
4369        }
4370        return (uint32_t) STRATEGY_ACCESSIBILITY;
4371
4372    case AUDIO_USAGE_MEDIA:
4373    case AUDIO_USAGE_GAME:
4374    case AUDIO_USAGE_ASSISTANCE_NAVIGATION_GUIDANCE:
4375    case AUDIO_USAGE_ASSISTANCE_SONIFICATION:
4376        return (uint32_t) STRATEGY_MEDIA;
4377
4378    case AUDIO_USAGE_VOICE_COMMUNICATION:
4379        return (uint32_t) STRATEGY_PHONE;
4380
4381    case AUDIO_USAGE_VOICE_COMMUNICATION_SIGNALLING:
4382        return (uint32_t) STRATEGY_DTMF;
4383
4384    case AUDIO_USAGE_ALARM:
4385    case AUDIO_USAGE_NOTIFICATION_TELEPHONY_RINGTONE:
4386        return (uint32_t) STRATEGY_SONIFICATION;
4387
4388    case AUDIO_USAGE_NOTIFICATION:
4389    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_REQUEST:
4390    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_INSTANT:
4391    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_DELAYED:
4392    case AUDIO_USAGE_NOTIFICATION_EVENT:
4393        return (uint32_t) STRATEGY_SONIFICATION_RESPECTFUL;
4394
4395    case AUDIO_USAGE_UNKNOWN:
4396    default:
4397        return (uint32_t) STRATEGY_MEDIA;
4398    }
4399}
4400
4401void AudioPolicyManager::handleNotificationRoutingForStream(audio_stream_type_t stream) {
4402    switch(stream) {
4403    case AUDIO_STREAM_MUSIC:
4404        checkOutputForStrategy(STRATEGY_SONIFICATION_RESPECTFUL);
4405        updateDevicesAndOutputs();
4406        break;
4407    default:
4408        break;
4409    }
4410}
4411
4412bool AudioPolicyManager::isAnyOutputActive(audio_stream_type_t streamToIgnore) {
4413    for (size_t s = 0 ; s < AUDIO_STREAM_CNT ; s++) {
4414        if (s == (size_t) streamToIgnore) {
4415            continue;
4416        }
4417        for (size_t i = 0; i < mOutputs.size(); i++) {
4418            const sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(i);
4419            if (outputDesc->mRefCount[s] != 0) {
4420                return true;
4421            }
4422        }
4423    }
4424    return false;
4425}
4426
4427uint32_t AudioPolicyManager::handleEventForBeacon(int event) {
4428    switch(event) {
4429    case STARTING_OUTPUT:
4430        mBeaconMuteRefCount++;
4431        break;
4432    case STOPPING_OUTPUT:
4433        if (mBeaconMuteRefCount > 0) {
4434            mBeaconMuteRefCount--;
4435        }
4436        break;
4437    case STARTING_BEACON:
4438        mBeaconPlayingRefCount++;
4439        break;
4440    case STOPPING_BEACON:
4441        if (mBeaconPlayingRefCount > 0) {
4442            mBeaconPlayingRefCount--;
4443        }
4444        break;
4445    }
4446
4447    if (mBeaconMuteRefCount > 0) {
4448        // any playback causes beacon to be muted
4449        return setBeaconMute(true);
4450    } else {
4451        // no other playback: unmute when beacon starts playing, mute when it stops
4452        return setBeaconMute(mBeaconPlayingRefCount == 0);
4453    }
4454}
4455
4456uint32_t AudioPolicyManager::setBeaconMute(bool mute) {
4457    ALOGV("setBeaconMute(%d) mBeaconMuteRefCount=%d mBeaconPlayingRefCount=%d",
4458            mute, mBeaconMuteRefCount, mBeaconPlayingRefCount);
4459    // keep track of muted state to avoid repeating mute/unmute operations
4460    if (mBeaconMuted != mute) {
4461        // mute/unmute AUDIO_STREAM_TTS on all outputs
4462        ALOGV("\t muting %d", mute);
4463        uint32_t maxLatency = 0;
4464        for (size_t i = 0; i < mOutputs.size(); i++) {
4465            sp<AudioOutputDescriptor> desc = mOutputs.valueAt(i);
4466            setStreamMute(AUDIO_STREAM_TTS, mute/*on*/,
4467                    desc->mIoHandle,
4468                    0 /*delay*/, AUDIO_DEVICE_NONE);
4469            const uint32_t latency = desc->latency() * 2;
4470            if (latency > maxLatency) {
4471                maxLatency = latency;
4472            }
4473        }
4474        mBeaconMuted = mute;
4475        return maxLatency;
4476    }
4477    return 0;
4478}
4479
4480audio_devices_t AudioPolicyManager::getDeviceForStrategy(routing_strategy strategy,
4481                                                             bool fromCache)
4482{
4483    uint32_t device = AUDIO_DEVICE_NONE;
4484
4485    if (fromCache) {
4486        ALOGVV("getDeviceForStrategy() from cache strategy %d, device %x",
4487              strategy, mDeviceForStrategy[strategy]);
4488        return mDeviceForStrategy[strategy];
4489    }
4490    audio_devices_t availableOutputDeviceTypes = mAvailableOutputDevices.types();
4491    switch (strategy) {
4492
4493    case STRATEGY_TRANSMITTED_THROUGH_SPEAKER:
4494        device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER;
4495        if (!device) {
4496            ALOGE("getDeviceForStrategy() no device found for "\
4497                    "STRATEGY_TRANSMITTED_THROUGH_SPEAKER");
4498        }
4499        break;
4500
4501    case STRATEGY_SONIFICATION_RESPECTFUL:
4502        if (isInCall()) {
4503            device = getDeviceForStrategy(STRATEGY_SONIFICATION, false /*fromCache*/);
4504        } else if (isStreamActiveRemotely(AUDIO_STREAM_MUSIC,
4505                SONIFICATION_RESPECTFUL_AFTER_MUSIC_DELAY)) {
4506            // while media is playing on a remote device, use the the sonification behavior.
4507            // Note that we test this usecase before testing if media is playing because
4508            //   the isStreamActive() method only informs about the activity of a stream, not
4509            //   if it's for local playback. Note also that we use the same delay between both tests
4510            device = getDeviceForStrategy(STRATEGY_SONIFICATION, false /*fromCache*/);
4511            //user "safe" speaker if available instead of normal speaker to avoid triggering
4512            //other acoustic safety mechanisms for notification
4513            if (device == AUDIO_DEVICE_OUT_SPEAKER && (availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER_SAFE))
4514                device = AUDIO_DEVICE_OUT_SPEAKER_SAFE;
4515        } else if (isStreamActive(AUDIO_STREAM_MUSIC, SONIFICATION_RESPECTFUL_AFTER_MUSIC_DELAY)) {
4516            // while media is playing (or has recently played), use the same device
4517            device = getDeviceForStrategy(STRATEGY_MEDIA, false /*fromCache*/);
4518        } else {
4519            // when media is not playing anymore, fall back on the sonification behavior
4520            device = getDeviceForStrategy(STRATEGY_SONIFICATION, false /*fromCache*/);
4521            //user "safe" speaker if available instead of normal speaker to avoid triggering
4522            //other acoustic safety mechanisms for notification
4523            if (device == AUDIO_DEVICE_OUT_SPEAKER && (availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER_SAFE))
4524                device = AUDIO_DEVICE_OUT_SPEAKER_SAFE;
4525        }
4526
4527        break;
4528
4529    case STRATEGY_DTMF:
4530        if (!isInCall()) {
4531            // when off call, DTMF strategy follows the same rules as MEDIA strategy
4532            device = getDeviceForStrategy(STRATEGY_MEDIA, false /*fromCache*/);
4533            break;
4534        }
4535        // when in call, DTMF and PHONE strategies follow the same rules
4536        // FALL THROUGH
4537
4538    case STRATEGY_PHONE:
4539        // Force use of only devices on primary output if:
4540        // - in call AND
4541        //   - cannot route from voice call RX OR
4542        //   - audio HAL version is < 3.0 and TX device is on the primary HW module
4543        if (mPhoneState == AUDIO_MODE_IN_CALL) {
4544            audio_devices_t txDevice =
4545                    getDeviceAndMixForInputSource(AUDIO_SOURCE_VOICE_COMMUNICATION);
4546            sp<AudioOutputDescriptor> hwOutputDesc = mOutputs.valueFor(mPrimaryOutput);
4547            if (((mAvailableInputDevices.types() &
4548                    AUDIO_DEVICE_IN_TELEPHONY_RX & ~AUDIO_DEVICE_BIT_IN) == 0) ||
4549                    (((txDevice & availablePrimaryInputDevices() & ~AUDIO_DEVICE_BIT_IN) != 0) &&
4550                         (hwOutputDesc->getAudioPort()->mModule->mHalVersion <
4551                             AUDIO_DEVICE_API_VERSION_3_0))) {
4552                availableOutputDeviceTypes = availablePrimaryOutputDevices();
4553            }
4554        }
4555        // for phone strategy, we first consider the forced use and then the available devices by order
4556        // of priority
4557        switch (mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION]) {
4558        case AUDIO_POLICY_FORCE_BT_SCO:
4559            if (!isInCall() || strategy != STRATEGY_DTMF) {
4560                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_SCO_CARKIT;
4561                if (device) break;
4562            }
4563            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_SCO_HEADSET;
4564            if (device) break;
4565            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_SCO;
4566            if (device) break;
4567            // if SCO device is requested but no SCO device is available, fall back to default case
4568            // FALL THROUGH
4569
4570        default:    // FORCE_NONE
4571            // when not in a phone call, phone strategy should route STREAM_VOICE_CALL to A2DP
4572            if (!isInCall() &&
4573                    (mForceUse[AUDIO_POLICY_FORCE_FOR_MEDIA] != AUDIO_POLICY_FORCE_NO_BT_A2DP) &&
4574                    (getA2dpOutput() != 0)) {
4575                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP;
4576                if (device) break;
4577                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES;
4578                if (device) break;
4579            }
4580            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_WIRED_HEADPHONE;
4581            if (device) break;
4582            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_WIRED_HEADSET;
4583            if (device) break;
4584            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_DEVICE;
4585            if (device) break;
4586            if (mPhoneState != AUDIO_MODE_IN_CALL) {
4587                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_ACCESSORY;
4588                if (device) break;
4589                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET;
4590                if (device) break;
4591                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_AUX_DIGITAL;
4592                if (device) break;
4593                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET;
4594                if (device) break;
4595            }
4596            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_EARPIECE;
4597            if (device) break;
4598            device = mDefaultOutputDevice->mDeviceType;
4599            if (device == AUDIO_DEVICE_NONE) {
4600                ALOGE("getDeviceForStrategy() no device found for STRATEGY_PHONE");
4601            }
4602            break;
4603
4604        case AUDIO_POLICY_FORCE_SPEAKER:
4605            // when not in a phone call, phone strategy should route STREAM_VOICE_CALL to
4606            // A2DP speaker when forcing to speaker output
4607            if (!isInCall() &&
4608                    (mForceUse[AUDIO_POLICY_FORCE_FOR_MEDIA] != AUDIO_POLICY_FORCE_NO_BT_A2DP) &&
4609                    (getA2dpOutput() != 0)) {
4610                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER;
4611                if (device) break;
4612            }
4613            if (!isInCall()) {
4614                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_ACCESSORY;
4615                if (device) break;
4616                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_DEVICE;
4617                if (device) break;
4618                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET;
4619                if (device) break;
4620                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_AUX_DIGITAL;
4621                if (device) break;
4622                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET;
4623                if (device) break;
4624            }
4625            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_LINE;
4626            if (device) break;
4627            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER;
4628            if (device) break;
4629            device = mDefaultOutputDevice->mDeviceType;
4630            if (device == AUDIO_DEVICE_NONE) {
4631                ALOGE("getDeviceForStrategy() no device found for STRATEGY_PHONE, FORCE_SPEAKER");
4632            }
4633            break;
4634        }
4635    break;
4636
4637    case STRATEGY_SONIFICATION:
4638
4639        // If incall, just select the STRATEGY_PHONE device: The rest of the behavior is handled by
4640        // handleIncallSonification().
4641        if (isInCall()) {
4642            device = getDeviceForStrategy(STRATEGY_PHONE, false /*fromCache*/);
4643            break;
4644        }
4645        // FALL THROUGH
4646
4647    case STRATEGY_ENFORCED_AUDIBLE:
4648        // strategy STRATEGY_ENFORCED_AUDIBLE uses same routing policy as STRATEGY_SONIFICATION
4649        // except:
4650        //   - when in call where it doesn't default to STRATEGY_PHONE behavior
4651        //   - in countries where not enforced in which case it follows STRATEGY_MEDIA
4652
4653        if ((strategy == STRATEGY_SONIFICATION) ||
4654                (mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] == AUDIO_POLICY_FORCE_SYSTEM_ENFORCED)) {
4655            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER;
4656            if (device == AUDIO_DEVICE_NONE) {
4657                ALOGE("getDeviceForStrategy() speaker device not found for STRATEGY_SONIFICATION");
4658            }
4659        }
4660        // The second device used for sonification is the same as the device used by media strategy
4661        // FALL THROUGH
4662
4663    // FIXME: STRATEGY_ACCESSIBILITY and STRATEGY_REROUTING follow STRATEGY_MEDIA for now
4664    case STRATEGY_ACCESSIBILITY:
4665        if (strategy == STRATEGY_ACCESSIBILITY) {
4666            // do not route accessibility prompts to a digital output currently configured with a
4667            // compressed format as they would likely not be mixed and dropped.
4668            for (size_t i = 0; i < mOutputs.size(); i++) {
4669                sp<AudioOutputDescriptor> desc = mOutputs.valueAt(i);
4670                audio_devices_t devices = desc->device() &
4671                    (AUDIO_DEVICE_OUT_HDMI | AUDIO_DEVICE_OUT_SPDIF | AUDIO_DEVICE_OUT_HDMI_ARC);
4672                if (desc->isActive() && !audio_is_linear_pcm(desc->mFormat) &&
4673                        devices != AUDIO_DEVICE_NONE) {
4674                    availableOutputDeviceTypes = availableOutputDeviceTypes & ~devices;
4675                }
4676            }
4677        }
4678        // FALL THROUGH
4679
4680    case STRATEGY_REROUTING:
4681    case STRATEGY_MEDIA: {
4682        uint32_t device2 = AUDIO_DEVICE_NONE;
4683        if (strategy != STRATEGY_SONIFICATION) {
4684            // no sonification on remote submix (e.g. WFD)
4685            if (mAvailableOutputDevices.getDevice(AUDIO_DEVICE_OUT_REMOTE_SUBMIX, String8("0")) != 0) {
4686                device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_REMOTE_SUBMIX;
4687            }
4688        }
4689        if ((device2 == AUDIO_DEVICE_NONE) &&
4690                (mForceUse[AUDIO_POLICY_FORCE_FOR_MEDIA] != AUDIO_POLICY_FORCE_NO_BT_A2DP) &&
4691                (getA2dpOutput() != 0)) {
4692            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP;
4693            if (device2 == AUDIO_DEVICE_NONE) {
4694                device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES;
4695            }
4696            if (device2 == AUDIO_DEVICE_NONE) {
4697                device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER;
4698            }
4699        }
4700        if ((device2 == AUDIO_DEVICE_NONE) &&
4701            (mForceUse[AUDIO_POLICY_FORCE_FOR_MEDIA] == AUDIO_POLICY_FORCE_SPEAKER)) {
4702            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER;
4703        }
4704        if (device2 == AUDIO_DEVICE_NONE) {
4705            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_WIRED_HEADPHONE;
4706        }
4707        if ((device2 == AUDIO_DEVICE_NONE)) {
4708            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_LINE;
4709        }
4710        if (device2 == AUDIO_DEVICE_NONE) {
4711            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_WIRED_HEADSET;
4712        }
4713        if (device2 == AUDIO_DEVICE_NONE) {
4714            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_ACCESSORY;
4715        }
4716        if (device2 == AUDIO_DEVICE_NONE) {
4717            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_DEVICE;
4718        }
4719        if (device2 == AUDIO_DEVICE_NONE) {
4720            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET;
4721        }
4722        if ((device2 == AUDIO_DEVICE_NONE) && (strategy != STRATEGY_SONIFICATION)) {
4723            // no sonification on aux digital (e.g. HDMI)
4724            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_AUX_DIGITAL;
4725        }
4726        if ((device2 == AUDIO_DEVICE_NONE) &&
4727                (mForceUse[AUDIO_POLICY_FORCE_FOR_DOCK] == AUDIO_POLICY_FORCE_ANALOG_DOCK)) {
4728            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET;
4729        }
4730        if (device2 == AUDIO_DEVICE_NONE) {
4731            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER;
4732        }
4733        int device3 = AUDIO_DEVICE_NONE;
4734        if (strategy == STRATEGY_MEDIA) {
4735            // ARC, SPDIF and AUX_LINE can co-exist with others.
4736            device3 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_HDMI_ARC;
4737            device3 |= (availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPDIF);
4738            device3 |= (availableOutputDeviceTypes & AUDIO_DEVICE_OUT_AUX_LINE);
4739        }
4740
4741        device2 |= device3;
4742        // device is DEVICE_OUT_SPEAKER if we come from case STRATEGY_SONIFICATION or
4743        // STRATEGY_ENFORCED_AUDIBLE, AUDIO_DEVICE_NONE otherwise
4744        device |= device2;
4745
4746        // If hdmi system audio mode is on, remove speaker out of output list.
4747        if ((strategy == STRATEGY_MEDIA) &&
4748            (mForceUse[AUDIO_POLICY_FORCE_FOR_HDMI_SYSTEM_AUDIO] ==
4749                AUDIO_POLICY_FORCE_HDMI_SYSTEM_AUDIO_ENFORCED)) {
4750            device &= ~AUDIO_DEVICE_OUT_SPEAKER;
4751        }
4752
4753        if (device) break;
4754        device = mDefaultOutputDevice->mDeviceType;
4755        if (device == AUDIO_DEVICE_NONE) {
4756            ALOGE("getDeviceForStrategy() no device found for STRATEGY_MEDIA");
4757        }
4758        } break;
4759
4760    default:
4761        ALOGW("getDeviceForStrategy() unknown strategy: %d", strategy);
4762        break;
4763    }
4764
4765    ALOGVV("getDeviceForStrategy() strategy %d, device %x", strategy, device);
4766    return device;
4767}
4768
4769void AudioPolicyManager::updateDevicesAndOutputs()
4770{
4771    for (int i = 0; i < NUM_STRATEGIES; i++) {
4772        mDeviceForStrategy[i] = getDeviceForStrategy((routing_strategy)i, false /*fromCache*/);
4773    }
4774    mPreviousOutputs = mOutputs;
4775}
4776
4777uint32_t AudioPolicyManager::checkDeviceMuteStrategies(sp<AudioOutputDescriptor> outputDesc,
4778                                                       audio_devices_t prevDevice,
4779                                                       uint32_t delayMs)
4780{
4781    // mute/unmute strategies using an incompatible device combination
4782    // if muting, wait for the audio in pcm buffer to be drained before proceeding
4783    // if unmuting, unmute only after the specified delay
4784    if (outputDesc->isDuplicated()) {
4785        return 0;
4786    }
4787
4788    uint32_t muteWaitMs = 0;
4789    audio_devices_t device = outputDesc->device();
4790    bool shouldMute = outputDesc->isActive() && (popcount(device) >= 2);
4791
4792    for (size_t i = 0; i < NUM_STRATEGIES; i++) {
4793        audio_devices_t curDevice = getDeviceForStrategy((routing_strategy)i, false /*fromCache*/);
4794        curDevice = curDevice & outputDesc->mProfile->mSupportedDevices.types();
4795        bool mute = shouldMute && (curDevice & device) && (curDevice != device);
4796        bool doMute = false;
4797
4798        if (mute && !outputDesc->mStrategyMutedByDevice[i]) {
4799            doMute = true;
4800            outputDesc->mStrategyMutedByDevice[i] = true;
4801        } else if (!mute && outputDesc->mStrategyMutedByDevice[i]){
4802            doMute = true;
4803            outputDesc->mStrategyMutedByDevice[i] = false;
4804        }
4805        if (doMute) {
4806            for (size_t j = 0; j < mOutputs.size(); j++) {
4807                sp<AudioOutputDescriptor> desc = mOutputs.valueAt(j);
4808                // skip output if it does not share any device with current output
4809                if ((desc->supportedDevices() & outputDesc->supportedDevices())
4810                        == AUDIO_DEVICE_NONE) {
4811                    continue;
4812                }
4813                audio_io_handle_t curOutput = mOutputs.keyAt(j);
4814                ALOGVV("checkDeviceMuteStrategies() %s strategy %d (curDevice %04x) on output %d",
4815                      mute ? "muting" : "unmuting", i, curDevice, curOutput);
4816                setStrategyMute((routing_strategy)i, mute, curOutput, mute ? 0 : delayMs);
4817                if (desc->isStrategyActive((routing_strategy)i)) {
4818                    if (mute) {
4819                        // FIXME: should not need to double latency if volume could be applied
4820                        // immediately by the audioflinger mixer. We must account for the delay
4821                        // between now and the next time the audioflinger thread for this output
4822                        // will process a buffer (which corresponds to one buffer size,
4823                        // usually 1/2 or 1/4 of the latency).
4824                        if (muteWaitMs < desc->latency() * 2) {
4825                            muteWaitMs = desc->latency() * 2;
4826                        }
4827                    }
4828                }
4829            }
4830        }
4831    }
4832
4833    // temporary mute output if device selection changes to avoid volume bursts due to
4834    // different per device volumes
4835    if (outputDesc->isActive() && (device != prevDevice)) {
4836        if (muteWaitMs < outputDesc->latency() * 2) {
4837            muteWaitMs = outputDesc->latency() * 2;
4838        }
4839        for (size_t i = 0; i < NUM_STRATEGIES; i++) {
4840            if (outputDesc->isStrategyActive((routing_strategy)i)) {
4841                setStrategyMute((routing_strategy)i, true, outputDesc->mIoHandle);
4842                // do tempMute unmute after twice the mute wait time
4843                setStrategyMute((routing_strategy)i, false, outputDesc->mIoHandle,
4844                                muteWaitMs *2, device);
4845            }
4846        }
4847    }
4848
4849    // wait for the PCM output buffers to empty before proceeding with the rest of the command
4850    if (muteWaitMs > delayMs) {
4851        muteWaitMs -= delayMs;
4852        usleep(muteWaitMs * 1000);
4853        return muteWaitMs;
4854    }
4855    return 0;
4856}
4857
4858uint32_t AudioPolicyManager::setOutputDevice(audio_io_handle_t output,
4859                                             audio_devices_t device,
4860                                             bool force,
4861                                             int delayMs,
4862                                             audio_patch_handle_t *patchHandle,
4863                                             const char* address)
4864{
4865    ALOGV("setOutputDevice() output %d device %04x delayMs %d", output, device, delayMs);
4866    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
4867    AudioParameter param;
4868    uint32_t muteWaitMs;
4869
4870    if (outputDesc->isDuplicated()) {
4871        muteWaitMs = setOutputDevice(outputDesc->mOutput1->mIoHandle, device, force, delayMs);
4872        muteWaitMs += setOutputDevice(outputDesc->mOutput2->mIoHandle, device, force, delayMs);
4873        return muteWaitMs;
4874    }
4875    // no need to proceed if new device is not AUDIO_DEVICE_NONE and not supported by current
4876    // output profile
4877    if ((device != AUDIO_DEVICE_NONE) &&
4878            ((device & outputDesc->mProfile->mSupportedDevices.types()) == 0)) {
4879        return 0;
4880    }
4881
4882    // filter devices according to output selected
4883    device = (audio_devices_t)(device & outputDesc->mProfile->mSupportedDevices.types());
4884
4885    audio_devices_t prevDevice = outputDesc->mDevice;
4886
4887    ALOGV("setOutputDevice() prevDevice %04x", prevDevice);
4888
4889    if (device != AUDIO_DEVICE_NONE) {
4890        outputDesc->mDevice = device;
4891    }
4892    muteWaitMs = checkDeviceMuteStrategies(outputDesc, prevDevice, delayMs);
4893
4894    // Do not change the routing if:
4895    //      the requested device is AUDIO_DEVICE_NONE
4896    //      OR the requested device is the same as current device
4897    //  AND force is not specified
4898    //  AND the output is connected by a valid audio patch.
4899    // Doing this check here allows the caller to call setOutputDevice() without conditions
4900    if ((device == AUDIO_DEVICE_NONE || device == prevDevice) && !force &&
4901            outputDesc->mPatchHandle != 0) {
4902        ALOGV("setOutputDevice() setting same device %04x or null device for output %d",
4903              device, output);
4904        return muteWaitMs;
4905    }
4906
4907    ALOGV("setOutputDevice() changing device");
4908
4909    // do the routing
4910    if (device == AUDIO_DEVICE_NONE) {
4911        resetOutputDevice(output, delayMs, NULL);
4912    } else {
4913        DeviceVector deviceList = (address == NULL) ?
4914                mAvailableOutputDevices.getDevicesFromType(device)
4915                : mAvailableOutputDevices.getDevicesFromTypeAddr(device, String8(address));
4916        if (!deviceList.isEmpty()) {
4917            struct audio_patch patch;
4918            outputDesc->toAudioPortConfig(&patch.sources[0]);
4919            patch.num_sources = 1;
4920            patch.num_sinks = 0;
4921            for (size_t i = 0; i < deviceList.size() && i < AUDIO_PATCH_PORTS_MAX; i++) {
4922                deviceList.itemAt(i)->toAudioPortConfig(&patch.sinks[i]);
4923                patch.num_sinks++;
4924            }
4925            ssize_t index;
4926            if (patchHandle && *patchHandle != AUDIO_PATCH_HANDLE_NONE) {
4927                index = mAudioPatches.indexOfKey(*patchHandle);
4928            } else {
4929                index = mAudioPatches.indexOfKey(outputDesc->mPatchHandle);
4930            }
4931            sp< AudioPatch> patchDesc;
4932            audio_patch_handle_t afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
4933            if (index >= 0) {
4934                patchDesc = mAudioPatches.valueAt(index);
4935                afPatchHandle = patchDesc->mAfPatchHandle;
4936            }
4937
4938            status_t status = mpClientInterface->createAudioPatch(&patch,
4939                                                                   &afPatchHandle,
4940                                                                   delayMs);
4941            ALOGV("setOutputDevice() createAudioPatch returned %d patchHandle %d"
4942                    "num_sources %d num_sinks %d",
4943                                       status, afPatchHandle, patch.num_sources, patch.num_sinks);
4944            if (status == NO_ERROR) {
4945                if (index < 0) {
4946                    patchDesc = new AudioPatch((audio_patch_handle_t)nextUniqueId(),
4947                                               &patch, mUidCached);
4948                    addAudioPatch(patchDesc->mHandle, patchDesc);
4949                } else {
4950                    patchDesc->mPatch = patch;
4951                }
4952                patchDesc->mAfPatchHandle = afPatchHandle;
4953                patchDesc->mUid = mUidCached;
4954                if (patchHandle) {
4955                    *patchHandle = patchDesc->mHandle;
4956                }
4957                outputDesc->mPatchHandle = patchDesc->mHandle;
4958                nextAudioPortGeneration();
4959                mpClientInterface->onAudioPatchListUpdate();
4960            }
4961        }
4962
4963        // inform all input as well
4964        for (size_t i = 0; i < mInputs.size(); i++) {
4965            const sp<AudioInputDescriptor>  inputDescriptor = mInputs.valueAt(i);
4966            if (!isVirtualInputDevice(inputDescriptor->mDevice)) {
4967                AudioParameter inputCmd = AudioParameter();
4968                ALOGV("%s: inform input %d of device:%d", __func__,
4969                      inputDescriptor->mIoHandle, device);
4970                inputCmd.addInt(String8(AudioParameter::keyRouting),device);
4971                mpClientInterface->setParameters(inputDescriptor->mIoHandle,
4972                                                 inputCmd.toString(),
4973                                                 delayMs);
4974            }
4975        }
4976    }
4977
4978    // update stream volumes according to new device
4979    applyStreamVolumes(output, device, delayMs);
4980
4981    return muteWaitMs;
4982}
4983
4984status_t AudioPolicyManager::resetOutputDevice(audio_io_handle_t output,
4985                                               int delayMs,
4986                                               audio_patch_handle_t *patchHandle)
4987{
4988    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
4989    ssize_t index;
4990    if (patchHandle) {
4991        index = mAudioPatches.indexOfKey(*patchHandle);
4992    } else {
4993        index = mAudioPatches.indexOfKey(outputDesc->mPatchHandle);
4994    }
4995    if (index < 0) {
4996        return INVALID_OPERATION;
4997    }
4998    sp< AudioPatch> patchDesc = mAudioPatches.valueAt(index);
4999    status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, delayMs);
5000    ALOGV("resetOutputDevice() releaseAudioPatch returned %d", status);
5001    outputDesc->mPatchHandle = 0;
5002    removeAudioPatch(patchDesc->mHandle);
5003    nextAudioPortGeneration();
5004    mpClientInterface->onAudioPatchListUpdate();
5005    return status;
5006}
5007
5008status_t AudioPolicyManager::setInputDevice(audio_io_handle_t input,
5009                                            audio_devices_t device,
5010                                            bool force,
5011                                            audio_patch_handle_t *patchHandle)
5012{
5013    status_t status = NO_ERROR;
5014
5015    sp<AudioInputDescriptor> inputDesc = mInputs.valueFor(input);
5016    if ((device != AUDIO_DEVICE_NONE) && ((device != inputDesc->mDevice) || force)) {
5017        inputDesc->mDevice = device;
5018
5019        DeviceVector deviceList = mAvailableInputDevices.getDevicesFromType(device);
5020        if (!deviceList.isEmpty()) {
5021            struct audio_patch patch;
5022            inputDesc->toAudioPortConfig(&patch.sinks[0]);
5023            // AUDIO_SOURCE_HOTWORD is for internal use only:
5024            // handled as AUDIO_SOURCE_VOICE_RECOGNITION by the audio HAL
5025            if (patch.sinks[0].ext.mix.usecase.source == AUDIO_SOURCE_HOTWORD &&
5026                    !inputDesc->mIsSoundTrigger) {
5027                patch.sinks[0].ext.mix.usecase.source = AUDIO_SOURCE_VOICE_RECOGNITION;
5028            }
5029            patch.num_sinks = 1;
5030            //only one input device for now
5031            deviceList.itemAt(0)->toAudioPortConfig(&patch.sources[0]);
5032            patch.num_sources = 1;
5033            ssize_t index;
5034            if (patchHandle && *patchHandle != AUDIO_PATCH_HANDLE_NONE) {
5035                index = mAudioPatches.indexOfKey(*patchHandle);
5036            } else {
5037                index = mAudioPatches.indexOfKey(inputDesc->mPatchHandle);
5038            }
5039            sp< AudioPatch> patchDesc;
5040            audio_patch_handle_t afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
5041            if (index >= 0) {
5042                patchDesc = mAudioPatches.valueAt(index);
5043                afPatchHandle = patchDesc->mAfPatchHandle;
5044            }
5045
5046            status_t status = mpClientInterface->createAudioPatch(&patch,
5047                                                                  &afPatchHandle,
5048                                                                  0);
5049            ALOGV("setInputDevice() createAudioPatch returned %d patchHandle %d",
5050                                                                          status, afPatchHandle);
5051            if (status == NO_ERROR) {
5052                if (index < 0) {
5053                    patchDesc = new AudioPatch((audio_patch_handle_t)nextUniqueId(),
5054                                               &patch, mUidCached);
5055                    addAudioPatch(patchDesc->mHandle, patchDesc);
5056                } else {
5057                    patchDesc->mPatch = patch;
5058                }
5059                patchDesc->mAfPatchHandle = afPatchHandle;
5060                patchDesc->mUid = mUidCached;
5061                if (patchHandle) {
5062                    *patchHandle = patchDesc->mHandle;
5063                }
5064                inputDesc->mPatchHandle = patchDesc->mHandle;
5065                nextAudioPortGeneration();
5066                mpClientInterface->onAudioPatchListUpdate();
5067            }
5068        }
5069    }
5070    return status;
5071}
5072
5073status_t AudioPolicyManager::resetInputDevice(audio_io_handle_t input,
5074                                              audio_patch_handle_t *patchHandle)
5075{
5076    sp<AudioInputDescriptor> inputDesc = mInputs.valueFor(input);
5077    ssize_t index;
5078    if (patchHandle) {
5079        index = mAudioPatches.indexOfKey(*patchHandle);
5080    } else {
5081        index = mAudioPatches.indexOfKey(inputDesc->mPatchHandle);
5082    }
5083    if (index < 0) {
5084        return INVALID_OPERATION;
5085    }
5086    sp< AudioPatch> patchDesc = mAudioPatches.valueAt(index);
5087    status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, 0);
5088    ALOGV("resetInputDevice() releaseAudioPatch returned %d", status);
5089    inputDesc->mPatchHandle = 0;
5090    removeAudioPatch(patchDesc->mHandle);
5091    nextAudioPortGeneration();
5092    mpClientInterface->onAudioPatchListUpdate();
5093    return status;
5094}
5095
5096sp<AudioPolicyManager::IOProfile> AudioPolicyManager::getInputProfile(audio_devices_t device,
5097                                                   String8 address,
5098                                                   uint32_t& samplingRate,
5099                                                   audio_format_t format,
5100                                                   audio_channel_mask_t channelMask,
5101                                                   audio_input_flags_t flags)
5102{
5103    // Choose an input profile based on the requested capture parameters: select the first available
5104    // profile supporting all requested parameters.
5105
5106    for (size_t i = 0; i < mHwModules.size(); i++)
5107    {
5108        if (mHwModules[i]->mHandle == 0) {
5109            continue;
5110        }
5111        for (size_t j = 0; j < mHwModules[i]->mInputProfiles.size(); j++)
5112        {
5113            sp<IOProfile> profile = mHwModules[i]->mInputProfiles[j];
5114            // profile->log();
5115            if (profile->isCompatibleProfile(device, address, samplingRate,
5116                                             &samplingRate /*updatedSamplingRate*/,
5117                                             format, channelMask, (audio_output_flags_t) flags)) {
5118
5119                return profile;
5120            }
5121        }
5122    }
5123    return NULL;
5124}
5125
5126
5127audio_devices_t AudioPolicyManager::getDeviceAndMixForInputSource(audio_source_t inputSource,
5128                                                            AudioMix **policyMix)
5129{
5130    audio_devices_t availableDeviceTypes = mAvailableInputDevices.types() &
5131                                            ~AUDIO_DEVICE_BIT_IN;
5132
5133    for (size_t i = 0; i < mPolicyMixes.size(); i++) {
5134        if (mPolicyMixes[i]->mMix.mMixType != MIX_TYPE_RECORDERS) {
5135            continue;
5136        }
5137        for (size_t j = 0; j < mPolicyMixes[i]->mMix.mCriteria.size(); j++) {
5138            if ((RULE_MATCH_ATTRIBUTE_CAPTURE_PRESET == mPolicyMixes[i]->mMix.mCriteria[j].mRule &&
5139                    mPolicyMixes[i]->mMix.mCriteria[j].mAttr.mSource == inputSource) ||
5140               (RULE_EXCLUDE_ATTRIBUTE_CAPTURE_PRESET == mPolicyMixes[i]->mMix.mCriteria[j].mRule &&
5141                    mPolicyMixes[i]->mMix.mCriteria[j].mAttr.mSource != inputSource)) {
5142                if (availableDeviceTypes & AUDIO_DEVICE_IN_REMOTE_SUBMIX) {
5143                    if (policyMix != NULL) {
5144                        *policyMix = &mPolicyMixes[i]->mMix;
5145                    }
5146                    return AUDIO_DEVICE_IN_REMOTE_SUBMIX;
5147                }
5148                break;
5149            }
5150        }
5151    }
5152
5153    return getDeviceForInputSource(inputSource);
5154}
5155
5156audio_devices_t AudioPolicyManager::getDeviceForInputSource(audio_source_t inputSource)
5157{
5158    uint32_t device = AUDIO_DEVICE_NONE;
5159    audio_devices_t availableDeviceTypes = mAvailableInputDevices.types() &
5160                                            ~AUDIO_DEVICE_BIT_IN;
5161
5162    switch (inputSource) {
5163    case AUDIO_SOURCE_VOICE_UPLINK:
5164      if (availableDeviceTypes & AUDIO_DEVICE_IN_VOICE_CALL) {
5165          device = AUDIO_DEVICE_IN_VOICE_CALL;
5166          break;
5167      }
5168      break;
5169
5170    case AUDIO_SOURCE_DEFAULT:
5171    case AUDIO_SOURCE_MIC:
5172    if (availableDeviceTypes & AUDIO_DEVICE_IN_BLUETOOTH_A2DP) {
5173        device = AUDIO_DEVICE_IN_BLUETOOTH_A2DP;
5174    } else if ((mForceUse[AUDIO_POLICY_FORCE_FOR_RECORD] == AUDIO_POLICY_FORCE_BT_SCO) &&
5175        (availableDeviceTypes & AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET)) {
5176        device = AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET;
5177    } else if (availableDeviceTypes & AUDIO_DEVICE_IN_WIRED_HEADSET) {
5178        device = AUDIO_DEVICE_IN_WIRED_HEADSET;
5179    } else if (availableDeviceTypes & AUDIO_DEVICE_IN_USB_DEVICE) {
5180        device = AUDIO_DEVICE_IN_USB_DEVICE;
5181    } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) {
5182        device = AUDIO_DEVICE_IN_BUILTIN_MIC;
5183    }
5184    break;
5185
5186    case AUDIO_SOURCE_VOICE_COMMUNICATION:
5187        // Allow only use of devices on primary input if in call and HAL does not support routing
5188        // to voice call path.
5189        if ((mPhoneState == AUDIO_MODE_IN_CALL) &&
5190                (mAvailableOutputDevices.types() & AUDIO_DEVICE_OUT_TELEPHONY_TX) == 0) {
5191            availableDeviceTypes = availablePrimaryInputDevices() & ~AUDIO_DEVICE_BIT_IN;
5192        }
5193
5194        switch (mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION]) {
5195        case AUDIO_POLICY_FORCE_BT_SCO:
5196            // if SCO device is requested but no SCO device is available, fall back to default case
5197            if (availableDeviceTypes & AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET) {
5198                device = AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET;
5199                break;
5200            }
5201            // FALL THROUGH
5202
5203        default:    // FORCE_NONE
5204            if (availableDeviceTypes & AUDIO_DEVICE_IN_WIRED_HEADSET) {
5205                device = AUDIO_DEVICE_IN_WIRED_HEADSET;
5206            } else if (availableDeviceTypes & AUDIO_DEVICE_IN_USB_DEVICE) {
5207                device = AUDIO_DEVICE_IN_USB_DEVICE;
5208            } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) {
5209                device = AUDIO_DEVICE_IN_BUILTIN_MIC;
5210            }
5211            break;
5212
5213        case AUDIO_POLICY_FORCE_SPEAKER:
5214            if (availableDeviceTypes & AUDIO_DEVICE_IN_BACK_MIC) {
5215                device = AUDIO_DEVICE_IN_BACK_MIC;
5216            } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) {
5217                device = AUDIO_DEVICE_IN_BUILTIN_MIC;
5218            }
5219            break;
5220        }
5221        break;
5222
5223    case AUDIO_SOURCE_VOICE_RECOGNITION:
5224    case AUDIO_SOURCE_HOTWORD:
5225        if (mForceUse[AUDIO_POLICY_FORCE_FOR_RECORD] == AUDIO_POLICY_FORCE_BT_SCO &&
5226                availableDeviceTypes & AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET) {
5227            device = AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET;
5228        } else if (availableDeviceTypes & AUDIO_DEVICE_IN_WIRED_HEADSET) {
5229            device = AUDIO_DEVICE_IN_WIRED_HEADSET;
5230        } else if (availableDeviceTypes & AUDIO_DEVICE_IN_USB_DEVICE) {
5231            device = AUDIO_DEVICE_IN_USB_DEVICE;
5232        } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) {
5233            device = AUDIO_DEVICE_IN_BUILTIN_MIC;
5234        }
5235        break;
5236    case AUDIO_SOURCE_CAMCORDER:
5237        if (availableDeviceTypes & AUDIO_DEVICE_IN_BACK_MIC) {
5238            device = AUDIO_DEVICE_IN_BACK_MIC;
5239        } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) {
5240            device = AUDIO_DEVICE_IN_BUILTIN_MIC;
5241        }
5242        break;
5243    case AUDIO_SOURCE_VOICE_DOWNLINK:
5244    case AUDIO_SOURCE_VOICE_CALL:
5245        if (availableDeviceTypes & AUDIO_DEVICE_IN_VOICE_CALL) {
5246            device = AUDIO_DEVICE_IN_VOICE_CALL;
5247        }
5248        break;
5249    case AUDIO_SOURCE_REMOTE_SUBMIX:
5250        if (availableDeviceTypes & AUDIO_DEVICE_IN_REMOTE_SUBMIX) {
5251            device = AUDIO_DEVICE_IN_REMOTE_SUBMIX;
5252        }
5253        break;
5254     case AUDIO_SOURCE_FM_TUNER:
5255        if (availableDeviceTypes & AUDIO_DEVICE_IN_FM_TUNER) {
5256            device = AUDIO_DEVICE_IN_FM_TUNER;
5257        }
5258        break;
5259    default:
5260        ALOGW("getDeviceForInputSource() invalid input source %d", inputSource);
5261        break;
5262    }
5263    ALOGV("getDeviceForInputSource()input source %d, device %08x", inputSource, device);
5264    return device;
5265}
5266
5267bool AudioPolicyManager::isVirtualInputDevice(audio_devices_t device)
5268{
5269    if ((device & AUDIO_DEVICE_BIT_IN) != 0) {
5270        device &= ~AUDIO_DEVICE_BIT_IN;
5271        if ((popcount(device) == 1) && ((device & ~APM_AUDIO_IN_DEVICE_VIRTUAL_ALL) == 0))
5272            return true;
5273    }
5274    return false;
5275}
5276
5277bool AudioPolicyManager::deviceDistinguishesOnAddress(audio_devices_t device) {
5278    return ((device & APM_AUDIO_DEVICE_MATCH_ADDRESS_ALL & ~AUDIO_DEVICE_BIT_IN) != 0);
5279}
5280
5281audio_io_handle_t AudioPolicyManager::getActiveInput(bool ignoreVirtualInputs)
5282{
5283    for (size_t i = 0; i < mInputs.size(); i++) {
5284        const sp<AudioInputDescriptor>  input_descriptor = mInputs.valueAt(i);
5285        if ((input_descriptor->mRefCount > 0)
5286                && (!ignoreVirtualInputs || !isVirtualInputDevice(input_descriptor->mDevice))) {
5287            return mInputs.keyAt(i);
5288        }
5289    }
5290    return 0;
5291}
5292
5293uint32_t AudioPolicyManager::activeInputsCount() const
5294{
5295    uint32_t count = 0;
5296    for (size_t i = 0; i < mInputs.size(); i++) {
5297        const sp<AudioInputDescriptor>  desc = mInputs.valueAt(i);
5298        if (desc->mRefCount > 0) {
5299            return count++;
5300        }
5301    }
5302    return count;
5303}
5304
5305
5306audio_devices_t AudioPolicyManager::getDeviceForVolume(audio_devices_t device)
5307{
5308    if (device == AUDIO_DEVICE_NONE) {
5309        // this happens when forcing a route update and no track is active on an output.
5310        // In this case the returned category is not important.
5311        device =  AUDIO_DEVICE_OUT_SPEAKER;
5312    } else if (popcount(device) > 1) {
5313        // Multiple device selection is either:
5314        //  - speaker + one other device: give priority to speaker in this case.
5315        //  - one A2DP device + another device: happens with duplicated output. In this case
5316        // retain the device on the A2DP output as the other must not correspond to an active
5317        // selection if not the speaker.
5318        //  - HDMI-CEC system audio mode only output: give priority to available item in order.
5319        if (device & AUDIO_DEVICE_OUT_SPEAKER) {
5320            device = AUDIO_DEVICE_OUT_SPEAKER;
5321        } else if (device & AUDIO_DEVICE_OUT_HDMI_ARC) {
5322            device = AUDIO_DEVICE_OUT_HDMI_ARC;
5323        } else if (device & AUDIO_DEVICE_OUT_AUX_LINE) {
5324            device = AUDIO_DEVICE_OUT_AUX_LINE;
5325        } else if (device & AUDIO_DEVICE_OUT_SPDIF) {
5326            device = AUDIO_DEVICE_OUT_SPDIF;
5327        } else {
5328            device = (audio_devices_t)(device & AUDIO_DEVICE_OUT_ALL_A2DP);
5329        }
5330    }
5331
5332    /*SPEAKER_SAFE is an alias of SPEAKER for purposes of volume control*/
5333    if (device == AUDIO_DEVICE_OUT_SPEAKER_SAFE)
5334        device = AUDIO_DEVICE_OUT_SPEAKER;
5335
5336    ALOGW_IF(popcount(device) != 1,
5337            "getDeviceForVolume() invalid device combination: %08x",
5338            device);
5339
5340    return device;
5341}
5342
5343AudioPolicyManager::device_category AudioPolicyManager::getDeviceCategory(audio_devices_t device)
5344{
5345    switch(getDeviceForVolume(device)) {
5346        case AUDIO_DEVICE_OUT_EARPIECE:
5347            return DEVICE_CATEGORY_EARPIECE;
5348        case AUDIO_DEVICE_OUT_WIRED_HEADSET:
5349        case AUDIO_DEVICE_OUT_WIRED_HEADPHONE:
5350        case AUDIO_DEVICE_OUT_BLUETOOTH_SCO:
5351        case AUDIO_DEVICE_OUT_BLUETOOTH_SCO_HEADSET:
5352        case AUDIO_DEVICE_OUT_BLUETOOTH_A2DP:
5353        case AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES:
5354            return DEVICE_CATEGORY_HEADSET;
5355        case AUDIO_DEVICE_OUT_LINE:
5356        case AUDIO_DEVICE_OUT_AUX_DIGITAL:
5357        /*USB?  Remote submix?*/
5358            return DEVICE_CATEGORY_EXT_MEDIA;
5359        case AUDIO_DEVICE_OUT_SPEAKER:
5360        case AUDIO_DEVICE_OUT_BLUETOOTH_SCO_CARKIT:
5361        case AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER:
5362        case AUDIO_DEVICE_OUT_USB_ACCESSORY:
5363        case AUDIO_DEVICE_OUT_USB_DEVICE:
5364        case AUDIO_DEVICE_OUT_REMOTE_SUBMIX:
5365        default:
5366            return DEVICE_CATEGORY_SPEAKER;
5367    }
5368}
5369
5370/* static */
5371float AudioPolicyManager::volIndexToAmpl(audio_devices_t device, const StreamDescriptor& streamDesc,
5372        int indexInUi)
5373{
5374    device_category deviceCategory = getDeviceCategory(device);
5375    const VolumeCurvePoint *curve = streamDesc.mVolumeCurve[deviceCategory];
5376
5377    // the volume index in the UI is relative to the min and max volume indices for this stream type
5378    int nbSteps = 1 + curve[VOLMAX].mIndex -
5379            curve[VOLMIN].mIndex;
5380    int volIdx = (nbSteps * (indexInUi - streamDesc.mIndexMin)) /
5381            (streamDesc.mIndexMax - streamDesc.mIndexMin);
5382
5383    // find what part of the curve this index volume belongs to, or if it's out of bounds
5384    int segment = 0;
5385    if (volIdx < curve[VOLMIN].mIndex) {         // out of bounds
5386        return 0.0f;
5387    } else if (volIdx < curve[VOLKNEE1].mIndex) {
5388        segment = 0;
5389    } else if (volIdx < curve[VOLKNEE2].mIndex) {
5390        segment = 1;
5391    } else if (volIdx <= curve[VOLMAX].mIndex) {
5392        segment = 2;
5393    } else {                                                               // out of bounds
5394        return 1.0f;
5395    }
5396
5397    // linear interpolation in the attenuation table in dB
5398    float decibels = curve[segment].mDBAttenuation +
5399            ((float)(volIdx - curve[segment].mIndex)) *
5400                ( (curve[segment+1].mDBAttenuation -
5401                        curve[segment].mDBAttenuation) /
5402                    ((float)(curve[segment+1].mIndex -
5403                            curve[segment].mIndex)) );
5404
5405    float amplification = exp( decibels * 0.115129f); // exp( dB * ln(10) / 20 )
5406
5407    ALOGVV("VOLUME vol index=[%d %d %d], dB=[%.1f %.1f %.1f] ampl=%.5f",
5408            curve[segment].mIndex, volIdx,
5409            curve[segment+1].mIndex,
5410            curve[segment].mDBAttenuation,
5411            decibels,
5412            curve[segment+1].mDBAttenuation,
5413            amplification);
5414
5415    return amplification;
5416}
5417
5418const AudioPolicyManager::VolumeCurvePoint
5419    AudioPolicyManager::sDefaultVolumeCurve[AudioPolicyManager::VOLCNT] = {
5420    {1, -49.5f}, {33, -33.5f}, {66, -17.0f}, {100, 0.0f}
5421};
5422
5423const AudioPolicyManager::VolumeCurvePoint
5424    AudioPolicyManager::sDefaultMediaVolumeCurve[AudioPolicyManager::VOLCNT] = {
5425    {1, -58.0f}, {20, -40.0f}, {60, -17.0f}, {100, 0.0f}
5426};
5427
5428const AudioPolicyManager::VolumeCurvePoint
5429    AudioPolicyManager::sExtMediaSystemVolumeCurve[AudioPolicyManager::VOLCNT] = {
5430    {1, -58.0f}, {20, -40.0f}, {60, -21.0f}, {100, -10.0f}
5431};
5432
5433const AudioPolicyManager::VolumeCurvePoint
5434    AudioPolicyManager::sSpeakerMediaVolumeCurve[AudioPolicyManager::VOLCNT] = {
5435    {1, -56.0f}, {20, -34.0f}, {60, -11.0f}, {100, 0.0f}
5436};
5437
5438const AudioPolicyManager::VolumeCurvePoint
5439    AudioPolicyManager::sSpeakerMediaVolumeCurveDrc[AudioPolicyManager::VOLCNT] = {
5440    {1, -55.0f}, {20, -43.0f}, {86, -12.0f}, {100, 0.0f}
5441};
5442
5443const AudioPolicyManager::VolumeCurvePoint
5444    AudioPolicyManager::sSpeakerSonificationVolumeCurve[AudioPolicyManager::VOLCNT] = {
5445    {1, -29.7f}, {33, -20.1f}, {66, -10.2f}, {100, 0.0f}
5446};
5447
5448const AudioPolicyManager::VolumeCurvePoint
5449    AudioPolicyManager::sSpeakerSonificationVolumeCurveDrc[AudioPolicyManager::VOLCNT] = {
5450    {1, -35.7f}, {33, -26.1f}, {66, -13.2f}, {100, 0.0f}
5451};
5452
5453// AUDIO_STREAM_SYSTEM, AUDIO_STREAM_ENFORCED_AUDIBLE and AUDIO_STREAM_DTMF volume tracks
5454// AUDIO_STREAM_RING on phones and AUDIO_STREAM_MUSIC on tablets.
5455// AUDIO_STREAM_DTMF tracks AUDIO_STREAM_VOICE_CALL while in call (See AudioService.java).
5456// The range is constrained between -24dB and -6dB over speaker and -30dB and -18dB over headset.
5457
5458const AudioPolicyManager::VolumeCurvePoint
5459    AudioPolicyManager::sDefaultSystemVolumeCurve[AudioPolicyManager::VOLCNT] = {
5460    {1, -24.0f}, {33, -18.0f}, {66, -12.0f}, {100, -6.0f}
5461};
5462
5463const AudioPolicyManager::VolumeCurvePoint
5464    AudioPolicyManager::sDefaultSystemVolumeCurveDrc[AudioPolicyManager::VOLCNT] = {
5465    {1, -34.0f}, {33, -24.0f}, {66, -15.0f}, {100, -6.0f}
5466};
5467
5468const AudioPolicyManager::VolumeCurvePoint
5469    AudioPolicyManager::sHeadsetSystemVolumeCurve[AudioPolicyManager::VOLCNT] = {
5470    {1, -30.0f}, {33, -26.0f}, {66, -22.0f}, {100, -18.0f}
5471};
5472
5473const AudioPolicyManager::VolumeCurvePoint
5474    AudioPolicyManager::sDefaultVoiceVolumeCurve[AudioPolicyManager::VOLCNT] = {
5475    {0, -42.0f}, {33, -28.0f}, {66, -14.0f}, {100, 0.0f}
5476};
5477
5478const AudioPolicyManager::VolumeCurvePoint
5479    AudioPolicyManager::sSpeakerVoiceVolumeCurve[AudioPolicyManager::VOLCNT] = {
5480    {0, -24.0f}, {33, -16.0f}, {66, -8.0f}, {100, 0.0f}
5481};
5482
5483const AudioPolicyManager::VolumeCurvePoint
5484    AudioPolicyManager::sLinearVolumeCurve[AudioPolicyManager::VOLCNT] = {
5485    {0, -96.0f}, {33, -68.0f}, {66, -34.0f}, {100, 0.0f}
5486};
5487
5488const AudioPolicyManager::VolumeCurvePoint
5489    AudioPolicyManager::sSilentVolumeCurve[AudioPolicyManager::VOLCNT] = {
5490    {0, -96.0f}, {1, -96.0f}, {2, -96.0f}, {100, -96.0f}
5491};
5492
5493const AudioPolicyManager::VolumeCurvePoint
5494    AudioPolicyManager::sFullScaleVolumeCurve[AudioPolicyManager::VOLCNT] = {
5495    {0, 0.0f}, {1, 0.0f}, {2, 0.0f}, {100, 0.0f}
5496};
5497
5498const AudioPolicyManager::VolumeCurvePoint
5499            *AudioPolicyManager::sVolumeProfiles[AUDIO_STREAM_CNT]
5500                                                   [AudioPolicyManager::DEVICE_CATEGORY_CNT] = {
5501    { // AUDIO_STREAM_VOICE_CALL
5502        sDefaultVoiceVolumeCurve, // DEVICE_CATEGORY_HEADSET
5503        sSpeakerVoiceVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5504        sDefaultVoiceVolumeCurve, // DEVICE_CATEGORY_EARPIECE
5505        sDefaultMediaVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5506    },
5507    { // AUDIO_STREAM_SYSTEM
5508        sHeadsetSystemVolumeCurve, // DEVICE_CATEGORY_HEADSET
5509        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5510        sDefaultSystemVolumeCurve,  // DEVICE_CATEGORY_EARPIECE
5511        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5512    },
5513    { // AUDIO_STREAM_RING
5514        sDefaultVolumeCurve, // DEVICE_CATEGORY_HEADSET
5515        sSpeakerSonificationVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5516        sDefaultVolumeCurve,  // DEVICE_CATEGORY_EARPIECE
5517        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5518    },
5519    { // AUDIO_STREAM_MUSIC
5520        sDefaultMediaVolumeCurve, // DEVICE_CATEGORY_HEADSET
5521        sSpeakerMediaVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5522        sDefaultMediaVolumeCurve, // DEVICE_CATEGORY_EARPIECE
5523        sDefaultMediaVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5524    },
5525    { // AUDIO_STREAM_ALARM
5526        sDefaultVolumeCurve, // DEVICE_CATEGORY_HEADSET
5527        sSpeakerSonificationVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5528        sDefaultVolumeCurve,  // DEVICE_CATEGORY_EARPIECE
5529        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5530    },
5531    { // AUDIO_STREAM_NOTIFICATION
5532        sDefaultVolumeCurve, // DEVICE_CATEGORY_HEADSET
5533        sSpeakerSonificationVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5534        sDefaultVolumeCurve,  // DEVICE_CATEGORY_EARPIECE
5535        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5536    },
5537    { // AUDIO_STREAM_BLUETOOTH_SCO
5538        sDefaultVoiceVolumeCurve, // DEVICE_CATEGORY_HEADSET
5539        sSpeakerVoiceVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5540        sDefaultVoiceVolumeCurve, // DEVICE_CATEGORY_EARPIECE
5541        sDefaultMediaVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5542    },
5543    { // AUDIO_STREAM_ENFORCED_AUDIBLE
5544        sHeadsetSystemVolumeCurve, // DEVICE_CATEGORY_HEADSET
5545        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5546        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_EARPIECE
5547        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5548    },
5549    {  // AUDIO_STREAM_DTMF
5550        sHeadsetSystemVolumeCurve, // DEVICE_CATEGORY_HEADSET
5551        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5552        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_EARPIECE
5553        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5554    },
5555    { // AUDIO_STREAM_TTS
5556      // "Transmitted Through Speaker": always silent except on DEVICE_CATEGORY_SPEAKER
5557        sSilentVolumeCurve, // DEVICE_CATEGORY_HEADSET
5558        sLinearVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5559        sSilentVolumeCurve, // DEVICE_CATEGORY_EARPIECE
5560        sSilentVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5561    },
5562    { // AUDIO_STREAM_ACCESSIBILITY
5563        sDefaultMediaVolumeCurve, // DEVICE_CATEGORY_HEADSET
5564        sSpeakerMediaVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5565        sDefaultMediaVolumeCurve, // DEVICE_CATEGORY_EARPIECE
5566        sDefaultMediaVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5567    },
5568    { // AUDIO_STREAM_REROUTING
5569        sFullScaleVolumeCurve, // DEVICE_CATEGORY_HEADSET
5570        sFullScaleVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5571        sFullScaleVolumeCurve, // DEVICE_CATEGORY_EARPIECE
5572        sFullScaleVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5573    },
5574    { // AUDIO_STREAM_PATCH
5575        sFullScaleVolumeCurve, // DEVICE_CATEGORY_HEADSET
5576        sFullScaleVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5577        sFullScaleVolumeCurve, // DEVICE_CATEGORY_EARPIECE
5578        sFullScaleVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5579    },
5580};
5581
5582void AudioPolicyManager::initializeVolumeCurves()
5583{
5584    for (int i = 0; i < AUDIO_STREAM_CNT; i++) {
5585        for (int j = 0; j < DEVICE_CATEGORY_CNT; j++) {
5586            mStreams[i].mVolumeCurve[j] =
5587                    sVolumeProfiles[i][j];
5588        }
5589    }
5590
5591    // Check availability of DRC on speaker path: if available, override some of the speaker curves
5592    if (mSpeakerDrcEnabled) {
5593        mStreams[AUDIO_STREAM_SYSTEM].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
5594                sDefaultSystemVolumeCurveDrc;
5595        mStreams[AUDIO_STREAM_RING].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
5596                sSpeakerSonificationVolumeCurveDrc;
5597        mStreams[AUDIO_STREAM_ALARM].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
5598                sSpeakerSonificationVolumeCurveDrc;
5599        mStreams[AUDIO_STREAM_NOTIFICATION].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
5600                sSpeakerSonificationVolumeCurveDrc;
5601        mStreams[AUDIO_STREAM_MUSIC].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
5602                sSpeakerMediaVolumeCurveDrc;
5603        mStreams[AUDIO_STREAM_ACCESSIBILITY].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
5604                sSpeakerMediaVolumeCurveDrc;
5605    }
5606}
5607
5608float AudioPolicyManager::computeVolume(audio_stream_type_t stream,
5609                                            int index,
5610                                            audio_io_handle_t output,
5611                                            audio_devices_t device)
5612{
5613    float volume = 1.0;
5614    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
5615    StreamDescriptor &streamDesc = mStreams[stream];
5616
5617    if (device == AUDIO_DEVICE_NONE) {
5618        device = outputDesc->device();
5619    }
5620
5621    volume = volIndexToAmpl(device, streamDesc, index);
5622
5623    // if a headset is connected, apply the following rules to ring tones and notifications
5624    // to avoid sound level bursts in user's ears:
5625    // - always attenuate ring tones and notifications volume by 6dB
5626    // - if music is playing, always limit the volume to current music volume,
5627    // with a minimum threshold at -36dB so that notification is always perceived.
5628    const routing_strategy stream_strategy = getStrategy(stream);
5629    if ((device & (AUDIO_DEVICE_OUT_BLUETOOTH_A2DP |
5630            AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES |
5631            AUDIO_DEVICE_OUT_WIRED_HEADSET |
5632            AUDIO_DEVICE_OUT_WIRED_HEADPHONE)) &&
5633        ((stream_strategy == STRATEGY_SONIFICATION)
5634                || (stream_strategy == STRATEGY_SONIFICATION_RESPECTFUL)
5635                || (stream == AUDIO_STREAM_SYSTEM)
5636                || ((stream_strategy == STRATEGY_ENFORCED_AUDIBLE) &&
5637                    (mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] == AUDIO_POLICY_FORCE_NONE))) &&
5638        streamDesc.mCanBeMuted) {
5639        volume *= SONIFICATION_HEADSET_VOLUME_FACTOR;
5640        // when the phone is ringing we must consider that music could have been paused just before
5641        // by the music application and behave as if music was active if the last music track was
5642        // just stopped
5643        if (isStreamActive(AUDIO_STREAM_MUSIC, SONIFICATION_HEADSET_MUSIC_DELAY) ||
5644                mLimitRingtoneVolume) {
5645            audio_devices_t musicDevice = getDeviceForStrategy(STRATEGY_MEDIA, true /*fromCache*/);
5646            float musicVol = computeVolume(AUDIO_STREAM_MUSIC,
5647                               mStreams[AUDIO_STREAM_MUSIC].getVolumeIndex(musicDevice),
5648                               output,
5649                               musicDevice);
5650            float minVol = (musicVol > SONIFICATION_HEADSET_VOLUME_MIN) ?
5651                                musicVol : SONIFICATION_HEADSET_VOLUME_MIN;
5652            if (volume > minVol) {
5653                volume = minVol;
5654                ALOGV("computeVolume limiting volume to %f musicVol %f", minVol, musicVol);
5655            }
5656        }
5657    }
5658
5659    return volume;
5660}
5661
5662status_t AudioPolicyManager::checkAndSetVolume(audio_stream_type_t stream,
5663                                                   int index,
5664                                                   audio_io_handle_t output,
5665                                                   audio_devices_t device,
5666                                                   int delayMs,
5667                                                   bool force)
5668{
5669
5670    // do not change actual stream volume if the stream is muted
5671    if (mOutputs.valueFor(output)->mMuteCount[stream] != 0) {
5672        ALOGVV("checkAndSetVolume() stream %d muted count %d",
5673              stream, mOutputs.valueFor(output)->mMuteCount[stream]);
5674        return NO_ERROR;
5675    }
5676
5677    // do not change in call volume if bluetooth is connected and vice versa
5678    if ((stream == AUDIO_STREAM_VOICE_CALL &&
5679            mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION] == AUDIO_POLICY_FORCE_BT_SCO) ||
5680        (stream == AUDIO_STREAM_BLUETOOTH_SCO &&
5681                mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION] != AUDIO_POLICY_FORCE_BT_SCO)) {
5682        ALOGV("checkAndSetVolume() cannot set stream %d volume with force use = %d for comm",
5683             stream, mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION]);
5684        return INVALID_OPERATION;
5685    }
5686
5687    float volume = computeVolume(stream, index, output, device);
5688    // unit gain if rerouting to external policy
5689    if (device == AUDIO_DEVICE_OUT_REMOTE_SUBMIX) {
5690        ssize_t index = mOutputs.indexOfKey(output);
5691        if (index >= 0) {
5692            sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(index);
5693            if (outputDesc->mPolicyMix != NULL) {
5694                ALOGV("max gain when rerouting for output=%d", output);
5695                volume = 1.0f;
5696            }
5697        }
5698
5699    }
5700    // We actually change the volume if:
5701    // - the float value returned by computeVolume() changed
5702    // - the force flag is set
5703    if (volume != mOutputs.valueFor(output)->mCurVolume[stream] ||
5704            force) {
5705        mOutputs.valueFor(output)->mCurVolume[stream] = volume;
5706        ALOGVV("checkAndSetVolume() for output %d stream %d, volume %f, delay %d", output, stream, volume, delayMs);
5707        // Force VOICE_CALL to track BLUETOOTH_SCO stream volume when bluetooth audio is
5708        // enabled
5709        if (stream == AUDIO_STREAM_BLUETOOTH_SCO) {
5710            mpClientInterface->setStreamVolume(AUDIO_STREAM_VOICE_CALL, volume, output, delayMs);
5711        }
5712        mpClientInterface->setStreamVolume(stream, volume, output, delayMs);
5713    }
5714
5715    if (stream == AUDIO_STREAM_VOICE_CALL ||
5716        stream == AUDIO_STREAM_BLUETOOTH_SCO) {
5717        float voiceVolume;
5718        // Force voice volume to max for bluetooth SCO as volume is managed by the headset
5719        if (stream == AUDIO_STREAM_VOICE_CALL) {
5720            voiceVolume = (float)index/(float)mStreams[stream].mIndexMax;
5721        } else {
5722            voiceVolume = 1.0;
5723        }
5724
5725        if (voiceVolume != mLastVoiceVolume && output == mPrimaryOutput) {
5726            mpClientInterface->setVoiceVolume(voiceVolume, delayMs);
5727            mLastVoiceVolume = voiceVolume;
5728        }
5729    }
5730
5731    return NO_ERROR;
5732}
5733
5734void AudioPolicyManager::applyStreamVolumes(audio_io_handle_t output,
5735                                                audio_devices_t device,
5736                                                int delayMs,
5737                                                bool force)
5738{
5739    ALOGVV("applyStreamVolumes() for output %d and device %x", output, device);
5740
5741    for (int stream = 0; stream < AUDIO_STREAM_CNT; stream++) {
5742        if (stream == AUDIO_STREAM_PATCH) {
5743            continue;
5744        }
5745        checkAndSetVolume((audio_stream_type_t)stream,
5746                          mStreams[stream].getVolumeIndex(device),
5747                          output,
5748                          device,
5749                          delayMs,
5750                          force);
5751    }
5752}
5753
5754void AudioPolicyManager::setStrategyMute(routing_strategy strategy,
5755                                             bool on,
5756                                             audio_io_handle_t output,
5757                                             int delayMs,
5758                                             audio_devices_t device)
5759{
5760    ALOGVV("setStrategyMute() strategy %d, mute %d, output %d", strategy, on, output);
5761    for (int stream = 0; stream < AUDIO_STREAM_CNT; stream++) {
5762        if (stream == AUDIO_STREAM_PATCH) {
5763            continue;
5764        }
5765        if (getStrategy((audio_stream_type_t)stream) == strategy) {
5766            setStreamMute((audio_stream_type_t)stream, on, output, delayMs, device);
5767        }
5768    }
5769}
5770
5771void AudioPolicyManager::setStreamMute(audio_stream_type_t stream,
5772                                           bool on,
5773                                           audio_io_handle_t output,
5774                                           int delayMs,
5775                                           audio_devices_t device)
5776{
5777    StreamDescriptor &streamDesc = mStreams[stream];
5778    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
5779    if (device == AUDIO_DEVICE_NONE) {
5780        device = outputDesc->device();
5781    }
5782
5783    ALOGVV("setStreamMute() stream %d, mute %d, output %d, mMuteCount %d device %04x",
5784          stream, on, output, outputDesc->mMuteCount[stream], device);
5785
5786    if (on) {
5787        if (outputDesc->mMuteCount[stream] == 0) {
5788            if (streamDesc.mCanBeMuted &&
5789                    ((stream != AUDIO_STREAM_ENFORCED_AUDIBLE) ||
5790                     (mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] == AUDIO_POLICY_FORCE_NONE))) {
5791                checkAndSetVolume(stream, 0, output, device, delayMs);
5792            }
5793        }
5794        // increment mMuteCount after calling checkAndSetVolume() so that volume change is not ignored
5795        outputDesc->mMuteCount[stream]++;
5796    } else {
5797        if (outputDesc->mMuteCount[stream] == 0) {
5798            ALOGV("setStreamMute() unmuting non muted stream!");
5799            return;
5800        }
5801        if (--outputDesc->mMuteCount[stream] == 0) {
5802            checkAndSetVolume(stream,
5803                              streamDesc.getVolumeIndex(device),
5804                              output,
5805                              device,
5806                              delayMs);
5807        }
5808    }
5809}
5810
5811void AudioPolicyManager::handleIncallSonification(audio_stream_type_t stream,
5812                                                      bool starting, bool stateChange)
5813{
5814    // if the stream pertains to sonification strategy and we are in call we must
5815    // mute the stream if it is low visibility. If it is high visibility, we must play a tone
5816    // in the device used for phone strategy and play the tone if the selected device does not
5817    // interfere with the device used for phone strategy
5818    // if stateChange is true, we are called from setPhoneState() and we must mute or unmute as
5819    // many times as there are active tracks on the output
5820    const routing_strategy stream_strategy = getStrategy(stream);
5821    if ((stream_strategy == STRATEGY_SONIFICATION) ||
5822            ((stream_strategy == STRATEGY_SONIFICATION_RESPECTFUL))) {
5823        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(mPrimaryOutput);
5824        ALOGV("handleIncallSonification() stream %d starting %d device %x stateChange %d",
5825                stream, starting, outputDesc->mDevice, stateChange);
5826        if (outputDesc->mRefCount[stream]) {
5827            int muteCount = 1;
5828            if (stateChange) {
5829                muteCount = outputDesc->mRefCount[stream];
5830            }
5831            if (audio_is_low_visibility(stream)) {
5832                ALOGV("handleIncallSonification() low visibility, muteCount %d", muteCount);
5833                for (int i = 0; i < muteCount; i++) {
5834                    setStreamMute(stream, starting, mPrimaryOutput);
5835                }
5836            } else {
5837                ALOGV("handleIncallSonification() high visibility");
5838                if (outputDesc->device() &
5839                        getDeviceForStrategy(STRATEGY_PHONE, true /*fromCache*/)) {
5840                    ALOGV("handleIncallSonification() high visibility muted, muteCount %d", muteCount);
5841                    for (int i = 0; i < muteCount; i++) {
5842                        setStreamMute(stream, starting, mPrimaryOutput);
5843                    }
5844                }
5845                if (starting) {
5846                    mpClientInterface->startTone(AUDIO_POLICY_TONE_IN_CALL_NOTIFICATION,
5847                                                 AUDIO_STREAM_VOICE_CALL);
5848                } else {
5849                    mpClientInterface->stopTone();
5850                }
5851            }
5852        }
5853    }
5854}
5855
5856bool AudioPolicyManager::isInCall()
5857{
5858    return isStateInCall(mPhoneState);
5859}
5860
5861bool AudioPolicyManager::isStateInCall(int state) {
5862    return ((state == AUDIO_MODE_IN_CALL) ||
5863            (state == AUDIO_MODE_IN_COMMUNICATION));
5864}
5865
5866uint32_t AudioPolicyManager::getMaxEffectsCpuLoad()
5867{
5868    return MAX_EFFECTS_CPU_LOAD;
5869}
5870
5871uint32_t AudioPolicyManager::getMaxEffectsMemory()
5872{
5873    return MAX_EFFECTS_MEMORY;
5874}
5875
5876
5877// --- AudioOutputDescriptor class implementation
5878
5879AudioPolicyManager::AudioOutputDescriptor::AudioOutputDescriptor(
5880        const sp<IOProfile>& profile)
5881    : mId(0), mIoHandle(0), mLatency(0),
5882    mFlags((audio_output_flags_t)0), mDevice(AUDIO_DEVICE_NONE), mPolicyMix(NULL),
5883    mPatchHandle(0),
5884    mOutput1(0), mOutput2(0), mProfile(profile), mDirectOpenCount(0)
5885{
5886    // clear usage count for all stream types
5887    for (int i = 0; i < AUDIO_STREAM_CNT; i++) {
5888        mRefCount[i] = 0;
5889        mCurVolume[i] = -1.0;
5890        mMuteCount[i] = 0;
5891        mStopTime[i] = 0;
5892    }
5893    for (int i = 0; i < NUM_STRATEGIES; i++) {
5894        mStrategyMutedByDevice[i] = false;
5895    }
5896    if (profile != NULL) {
5897        mFlags = (audio_output_flags_t)profile->mFlags;
5898        mSamplingRate = profile->pickSamplingRate();
5899        mFormat = profile->pickFormat();
5900        mChannelMask = profile->pickChannelMask();
5901        if (profile->mGains.size() > 0) {
5902            profile->mGains[0]->getDefaultConfig(&mGain);
5903        }
5904    }
5905}
5906
5907audio_devices_t AudioPolicyManager::AudioOutputDescriptor::device() const
5908{
5909    if (isDuplicated()) {
5910        return (audio_devices_t)(mOutput1->mDevice | mOutput2->mDevice);
5911    } else {
5912        return mDevice;
5913    }
5914}
5915
5916uint32_t AudioPolicyManager::AudioOutputDescriptor::latency()
5917{
5918    if (isDuplicated()) {
5919        return (mOutput1->mLatency > mOutput2->mLatency) ? mOutput1->mLatency : mOutput2->mLatency;
5920    } else {
5921        return mLatency;
5922    }
5923}
5924
5925bool AudioPolicyManager::AudioOutputDescriptor::sharesHwModuleWith(
5926        const sp<AudioOutputDescriptor> outputDesc)
5927{
5928    if (isDuplicated()) {
5929        return mOutput1->sharesHwModuleWith(outputDesc) || mOutput2->sharesHwModuleWith(outputDesc);
5930    } else if (outputDesc->isDuplicated()){
5931        return sharesHwModuleWith(outputDesc->mOutput1) || sharesHwModuleWith(outputDesc->mOutput2);
5932    } else {
5933        return (mProfile->mModule == outputDesc->mProfile->mModule);
5934    }
5935}
5936
5937void AudioPolicyManager::AudioOutputDescriptor::changeRefCount(audio_stream_type_t stream,
5938                                                                   int delta)
5939{
5940    // forward usage count change to attached outputs
5941    if (isDuplicated()) {
5942        mOutput1->changeRefCount(stream, delta);
5943        mOutput2->changeRefCount(stream, delta);
5944    }
5945    if ((delta + (int)mRefCount[stream]) < 0) {
5946        ALOGW("changeRefCount() invalid delta %d for stream %d, refCount %d",
5947              delta, stream, mRefCount[stream]);
5948        mRefCount[stream] = 0;
5949        return;
5950    }
5951    mRefCount[stream] += delta;
5952    ALOGV("changeRefCount() stream %d, count %d", stream, mRefCount[stream]);
5953}
5954
5955audio_devices_t AudioPolicyManager::AudioOutputDescriptor::supportedDevices()
5956{
5957    if (isDuplicated()) {
5958        return (audio_devices_t)(mOutput1->supportedDevices() | mOutput2->supportedDevices());
5959    } else {
5960        return mProfile->mSupportedDevices.types() ;
5961    }
5962}
5963
5964bool AudioPolicyManager::AudioOutputDescriptor::isActive(uint32_t inPastMs) const
5965{
5966    return isStrategyActive(NUM_STRATEGIES, inPastMs);
5967}
5968
5969bool AudioPolicyManager::AudioOutputDescriptor::isStrategyActive(routing_strategy strategy,
5970                                                                       uint32_t inPastMs,
5971                                                                       nsecs_t sysTime) const
5972{
5973    if ((sysTime == 0) && (inPastMs != 0)) {
5974        sysTime = systemTime();
5975    }
5976    for (int i = 0; i < (int)AUDIO_STREAM_CNT; i++) {
5977        if (i == AUDIO_STREAM_PATCH) {
5978            continue;
5979        }
5980        if (((getStrategy((audio_stream_type_t)i) == strategy) ||
5981                (NUM_STRATEGIES == strategy)) &&
5982                isStreamActive((audio_stream_type_t)i, inPastMs, sysTime)) {
5983            return true;
5984        }
5985    }
5986    return false;
5987}
5988
5989bool AudioPolicyManager::AudioOutputDescriptor::isStreamActive(audio_stream_type_t stream,
5990                                                                       uint32_t inPastMs,
5991                                                                       nsecs_t sysTime) const
5992{
5993    if (mRefCount[stream] != 0) {
5994        return true;
5995    }
5996    if (inPastMs == 0) {
5997        return false;
5998    }
5999    if (sysTime == 0) {
6000        sysTime = systemTime();
6001    }
6002    if (ns2ms(sysTime - mStopTime[stream]) < inPastMs) {
6003        return true;
6004    }
6005    return false;
6006}
6007
6008void AudioPolicyManager::AudioOutputDescriptor::toAudioPortConfig(
6009                                                 struct audio_port_config *dstConfig,
6010                                                 const struct audio_port_config *srcConfig) const
6011{
6012    ALOG_ASSERT(!isDuplicated(), "toAudioPortConfig() called on duplicated output %d", mIoHandle);
6013
6014    dstConfig->config_mask = AUDIO_PORT_CONFIG_SAMPLE_RATE|AUDIO_PORT_CONFIG_CHANNEL_MASK|
6015                            AUDIO_PORT_CONFIG_FORMAT|AUDIO_PORT_CONFIG_GAIN;
6016    if (srcConfig != NULL) {
6017        dstConfig->config_mask |= srcConfig->config_mask;
6018    }
6019    AudioPortConfig::toAudioPortConfig(dstConfig, srcConfig);
6020
6021    dstConfig->id = mId;
6022    dstConfig->role = AUDIO_PORT_ROLE_SOURCE;
6023    dstConfig->type = AUDIO_PORT_TYPE_MIX;
6024    dstConfig->ext.mix.hw_module = mProfile->mModule->mHandle;
6025    dstConfig->ext.mix.handle = mIoHandle;
6026    dstConfig->ext.mix.usecase.stream = AUDIO_STREAM_DEFAULT;
6027}
6028
6029void AudioPolicyManager::AudioOutputDescriptor::toAudioPort(
6030                                                    struct audio_port *port) const
6031{
6032    ALOG_ASSERT(!isDuplicated(), "toAudioPort() called on duplicated output %d", mIoHandle);
6033    mProfile->toAudioPort(port);
6034    port->id = mId;
6035    toAudioPortConfig(&port->active_config);
6036    port->ext.mix.hw_module = mProfile->mModule->mHandle;
6037    port->ext.mix.handle = mIoHandle;
6038    port->ext.mix.latency_class =
6039            mFlags & AUDIO_OUTPUT_FLAG_FAST ? AUDIO_LATENCY_LOW : AUDIO_LATENCY_NORMAL;
6040}
6041
6042status_t AudioPolicyManager::AudioOutputDescriptor::dump(int fd)
6043{
6044    const size_t SIZE = 256;
6045    char buffer[SIZE];
6046    String8 result;
6047
6048    snprintf(buffer, SIZE, " ID: %d\n", mId);
6049    result.append(buffer);
6050    snprintf(buffer, SIZE, " Sampling rate: %d\n", mSamplingRate);
6051    result.append(buffer);
6052    snprintf(buffer, SIZE, " Format: %08x\n", mFormat);
6053    result.append(buffer);
6054    snprintf(buffer, SIZE, " Channels: %08x\n", mChannelMask);
6055    result.append(buffer);
6056    snprintf(buffer, SIZE, " Latency: %d\n", mLatency);
6057    result.append(buffer);
6058    snprintf(buffer, SIZE, " Flags %08x\n", mFlags);
6059    result.append(buffer);
6060    snprintf(buffer, SIZE, " Devices %08x\n", device());
6061    result.append(buffer);
6062    snprintf(buffer, SIZE, " Stream volume refCount muteCount\n");
6063    result.append(buffer);
6064    for (int i = 0; i < (int)AUDIO_STREAM_CNT; i++) {
6065        snprintf(buffer, SIZE, " %02d     %.03f     %02d       %02d\n",
6066                 i, mCurVolume[i], mRefCount[i], mMuteCount[i]);
6067        result.append(buffer);
6068    }
6069    write(fd, result.string(), result.size());
6070
6071    return NO_ERROR;
6072}
6073
6074// --- AudioInputDescriptor class implementation
6075
6076AudioPolicyManager::AudioInputDescriptor::AudioInputDescriptor(const sp<IOProfile>& profile)
6077    : mId(0), mIoHandle(0),
6078      mDevice(AUDIO_DEVICE_NONE), mPolicyMix(NULL), mPatchHandle(0), mRefCount(0),
6079      mInputSource(AUDIO_SOURCE_DEFAULT), mProfile(profile), mIsSoundTrigger(false)
6080{
6081    if (profile != NULL) {
6082        mSamplingRate = profile->pickSamplingRate();
6083        mFormat = profile->pickFormat();
6084        mChannelMask = profile->pickChannelMask();
6085        if (profile->mGains.size() > 0) {
6086            profile->mGains[0]->getDefaultConfig(&mGain);
6087        }
6088    }
6089}
6090
6091void AudioPolicyManager::AudioInputDescriptor::toAudioPortConfig(
6092                                                   struct audio_port_config *dstConfig,
6093                                                   const struct audio_port_config *srcConfig) const
6094{
6095    ALOG_ASSERT(mProfile != 0,
6096                "toAudioPortConfig() called on input with null profile %d", mIoHandle);
6097    dstConfig->config_mask = AUDIO_PORT_CONFIG_SAMPLE_RATE|AUDIO_PORT_CONFIG_CHANNEL_MASK|
6098                            AUDIO_PORT_CONFIG_FORMAT|AUDIO_PORT_CONFIG_GAIN;
6099    if (srcConfig != NULL) {
6100        dstConfig->config_mask |= srcConfig->config_mask;
6101    }
6102
6103    AudioPortConfig::toAudioPortConfig(dstConfig, srcConfig);
6104
6105    dstConfig->id = mId;
6106    dstConfig->role = AUDIO_PORT_ROLE_SINK;
6107    dstConfig->type = AUDIO_PORT_TYPE_MIX;
6108    dstConfig->ext.mix.hw_module = mProfile->mModule->mHandle;
6109    dstConfig->ext.mix.handle = mIoHandle;
6110    dstConfig->ext.mix.usecase.source = mInputSource;
6111}
6112
6113void AudioPolicyManager::AudioInputDescriptor::toAudioPort(
6114                                                    struct audio_port *port) const
6115{
6116    ALOG_ASSERT(mProfile != 0, "toAudioPort() called on input with null profile %d", mIoHandle);
6117
6118    mProfile->toAudioPort(port);
6119    port->id = mId;
6120    toAudioPortConfig(&port->active_config);
6121    port->ext.mix.hw_module = mProfile->mModule->mHandle;
6122    port->ext.mix.handle = mIoHandle;
6123    port->ext.mix.latency_class = AUDIO_LATENCY_NORMAL;
6124}
6125
6126status_t AudioPolicyManager::AudioInputDescriptor::dump(int fd)
6127{
6128    const size_t SIZE = 256;
6129    char buffer[SIZE];
6130    String8 result;
6131
6132    snprintf(buffer, SIZE, " ID: %d\n", mId);
6133    result.append(buffer);
6134    snprintf(buffer, SIZE, " Sampling rate: %d\n", mSamplingRate);
6135    result.append(buffer);
6136    snprintf(buffer, SIZE, " Format: %d\n", mFormat);
6137    result.append(buffer);
6138    snprintf(buffer, SIZE, " Channels: %08x\n", mChannelMask);
6139    result.append(buffer);
6140    snprintf(buffer, SIZE, " Devices %08x\n", mDevice);
6141    result.append(buffer);
6142    snprintf(buffer, SIZE, " Ref Count %d\n", mRefCount);
6143    result.append(buffer);
6144    snprintf(buffer, SIZE, " Open Ref Count %d\n", mOpenRefCount);
6145    result.append(buffer);
6146
6147    write(fd, result.string(), result.size());
6148
6149    return NO_ERROR;
6150}
6151
6152// --- StreamDescriptor class implementation
6153
6154AudioPolicyManager::StreamDescriptor::StreamDescriptor()
6155    :   mIndexMin(0), mIndexMax(1), mCanBeMuted(true)
6156{
6157    mIndexCur.add(AUDIO_DEVICE_OUT_DEFAULT, 0);
6158}
6159
6160int AudioPolicyManager::StreamDescriptor::getVolumeIndex(audio_devices_t device)
6161{
6162    device = AudioPolicyManager::getDeviceForVolume(device);
6163    // there is always a valid entry for AUDIO_DEVICE_OUT_DEFAULT
6164    if (mIndexCur.indexOfKey(device) < 0) {
6165        device = AUDIO_DEVICE_OUT_DEFAULT;
6166    }
6167    return mIndexCur.valueFor(device);
6168}
6169
6170void AudioPolicyManager::StreamDescriptor::dump(int fd)
6171{
6172    const size_t SIZE = 256;
6173    char buffer[SIZE];
6174    String8 result;
6175
6176    snprintf(buffer, SIZE, "%s         %02d         %02d         ",
6177             mCanBeMuted ? "true " : "false", mIndexMin, mIndexMax);
6178    result.append(buffer);
6179    for (size_t i = 0; i < mIndexCur.size(); i++) {
6180        snprintf(buffer, SIZE, "%04x : %02d, ",
6181                 mIndexCur.keyAt(i),
6182                 mIndexCur.valueAt(i));
6183        result.append(buffer);
6184    }
6185    result.append("\n");
6186
6187    write(fd, result.string(), result.size());
6188}
6189
6190// --- EffectDescriptor class implementation
6191
6192status_t AudioPolicyManager::EffectDescriptor::dump(int fd)
6193{
6194    const size_t SIZE = 256;
6195    char buffer[SIZE];
6196    String8 result;
6197
6198    snprintf(buffer, SIZE, " I/O: %d\n", mIo);
6199    result.append(buffer);
6200    snprintf(buffer, SIZE, " Strategy: %d\n", mStrategy);
6201    result.append(buffer);
6202    snprintf(buffer, SIZE, " Session: %d\n", mSession);
6203    result.append(buffer);
6204    snprintf(buffer, SIZE, " Name: %s\n",  mDesc.name);
6205    result.append(buffer);
6206    snprintf(buffer, SIZE, " %s\n",  mEnabled ? "Enabled" : "Disabled");
6207    result.append(buffer);
6208    write(fd, result.string(), result.size());
6209
6210    return NO_ERROR;
6211}
6212
6213// --- HwModule class implementation
6214
6215AudioPolicyManager::HwModule::HwModule(const char *name)
6216    : mName(strndup(name, AUDIO_HARDWARE_MODULE_ID_MAX_LEN)),
6217      mHalVersion(AUDIO_DEVICE_API_VERSION_MIN), mHandle(0)
6218{
6219}
6220
6221AudioPolicyManager::HwModule::~HwModule()
6222{
6223    for (size_t i = 0; i < mOutputProfiles.size(); i++) {
6224        mOutputProfiles[i]->mSupportedDevices.clear();
6225    }
6226    for (size_t i = 0; i < mInputProfiles.size(); i++) {
6227        mInputProfiles[i]->mSupportedDevices.clear();
6228    }
6229    free((void *)mName);
6230}
6231
6232status_t AudioPolicyManager::HwModule::loadInput(cnode *root)
6233{
6234    cnode *node = root->first_child;
6235
6236    sp<IOProfile> profile = new IOProfile(String8(root->name), AUDIO_PORT_ROLE_SINK, this);
6237
6238    while (node) {
6239        if (strcmp(node->name, SAMPLING_RATES_TAG) == 0) {
6240            profile->loadSamplingRates((char *)node->value);
6241        } else if (strcmp(node->name, FORMATS_TAG) == 0) {
6242            profile->loadFormats((char *)node->value);
6243        } else if (strcmp(node->name, CHANNELS_TAG) == 0) {
6244            profile->loadInChannels((char *)node->value);
6245        } else if (strcmp(node->name, DEVICES_TAG) == 0) {
6246            profile->mSupportedDevices.loadDevicesFromName((char *)node->value,
6247                                                           mDeclaredDevices);
6248        } else if (strcmp(node->name, FLAGS_TAG) == 0) {
6249            profile->mFlags = parseInputFlagNames((char *)node->value);
6250        } else if (strcmp(node->name, GAINS_TAG) == 0) {
6251            profile->loadGains(node);
6252        }
6253        node = node->next;
6254    }
6255    ALOGW_IF(profile->mSupportedDevices.isEmpty(),
6256            "loadInput() invalid supported devices");
6257    ALOGW_IF(profile->mChannelMasks.size() == 0,
6258            "loadInput() invalid supported channel masks");
6259    ALOGW_IF(profile->mSamplingRates.size() == 0,
6260            "loadInput() invalid supported sampling rates");
6261    ALOGW_IF(profile->mFormats.size() == 0,
6262            "loadInput() invalid supported formats");
6263    if (!profile->mSupportedDevices.isEmpty() &&
6264            (profile->mChannelMasks.size() != 0) &&
6265            (profile->mSamplingRates.size() != 0) &&
6266            (profile->mFormats.size() != 0)) {
6267
6268        ALOGV("loadInput() adding input Supported Devices %04x",
6269              profile->mSupportedDevices.types());
6270
6271        mInputProfiles.add(profile);
6272        return NO_ERROR;
6273    } else {
6274        return BAD_VALUE;
6275    }
6276}
6277
6278status_t AudioPolicyManager::HwModule::loadOutput(cnode *root)
6279{
6280    cnode *node = root->first_child;
6281
6282    sp<IOProfile> profile = new IOProfile(String8(root->name), AUDIO_PORT_ROLE_SOURCE, this);
6283
6284    while (node) {
6285        if (strcmp(node->name, SAMPLING_RATES_TAG) == 0) {
6286            profile->loadSamplingRates((char *)node->value);
6287        } else if (strcmp(node->name, FORMATS_TAG) == 0) {
6288            profile->loadFormats((char *)node->value);
6289        } else if (strcmp(node->name, CHANNELS_TAG) == 0) {
6290            profile->loadOutChannels((char *)node->value);
6291        } else if (strcmp(node->name, DEVICES_TAG) == 0) {
6292            profile->mSupportedDevices.loadDevicesFromName((char *)node->value,
6293                                                           mDeclaredDevices);
6294        } else if (strcmp(node->name, FLAGS_TAG) == 0) {
6295            profile->mFlags = parseOutputFlagNames((char *)node->value);
6296        } else if (strcmp(node->name, GAINS_TAG) == 0) {
6297            profile->loadGains(node);
6298        }
6299        node = node->next;
6300    }
6301    ALOGW_IF(profile->mSupportedDevices.isEmpty(),
6302            "loadOutput() invalid supported devices");
6303    ALOGW_IF(profile->mChannelMasks.size() == 0,
6304            "loadOutput() invalid supported channel masks");
6305    ALOGW_IF(profile->mSamplingRates.size() == 0,
6306            "loadOutput() invalid supported sampling rates");
6307    ALOGW_IF(profile->mFormats.size() == 0,
6308            "loadOutput() invalid supported formats");
6309    if (!profile->mSupportedDevices.isEmpty() &&
6310            (profile->mChannelMasks.size() != 0) &&
6311            (profile->mSamplingRates.size() != 0) &&
6312            (profile->mFormats.size() != 0)) {
6313
6314        ALOGV("loadOutput() adding output Supported Devices %04x, mFlags %04x",
6315              profile->mSupportedDevices.types(), profile->mFlags);
6316
6317        mOutputProfiles.add(profile);
6318        return NO_ERROR;
6319    } else {
6320        return BAD_VALUE;
6321    }
6322}
6323
6324status_t AudioPolicyManager::HwModule::loadDevice(cnode *root)
6325{
6326    cnode *node = root->first_child;
6327
6328    audio_devices_t type = AUDIO_DEVICE_NONE;
6329    while (node) {
6330        if (strcmp(node->name, DEVICE_TYPE) == 0) {
6331            type = parseDeviceNames((char *)node->value);
6332            break;
6333        }
6334        node = node->next;
6335    }
6336    if (type == AUDIO_DEVICE_NONE ||
6337            (!audio_is_input_device(type) && !audio_is_output_device(type))) {
6338        ALOGW("loadDevice() bad type %08x", type);
6339        return BAD_VALUE;
6340    }
6341    sp<DeviceDescriptor> deviceDesc = new DeviceDescriptor(String8(root->name), type);
6342    deviceDesc->mModule = this;
6343
6344    node = root->first_child;
6345    while (node) {
6346        if (strcmp(node->name, DEVICE_ADDRESS) == 0) {
6347            deviceDesc->mAddress = String8((char *)node->value);
6348        } else if (strcmp(node->name, CHANNELS_TAG) == 0) {
6349            if (audio_is_input_device(type)) {
6350                deviceDesc->loadInChannels((char *)node->value);
6351            } else {
6352                deviceDesc->loadOutChannels((char *)node->value);
6353            }
6354        } else if (strcmp(node->name, GAINS_TAG) == 0) {
6355            deviceDesc->loadGains(node);
6356        }
6357        node = node->next;
6358    }
6359
6360    ALOGV("loadDevice() adding device name %s type %08x address %s",
6361          deviceDesc->mName.string(), type, deviceDesc->mAddress.string());
6362
6363    mDeclaredDevices.add(deviceDesc);
6364
6365    return NO_ERROR;
6366}
6367
6368status_t AudioPolicyManager::HwModule::addOutputProfile(String8 name, const audio_config_t *config,
6369                                                  audio_devices_t device, String8 address)
6370{
6371    sp<IOProfile> profile = new IOProfile(name, AUDIO_PORT_ROLE_SOURCE, this);
6372
6373    profile->mSamplingRates.add(config->sample_rate);
6374    profile->mChannelMasks.add(config->channel_mask);
6375    profile->mFormats.add(config->format);
6376
6377    sp<DeviceDescriptor> devDesc = new DeviceDescriptor(String8(""), device);
6378    devDesc->mAddress = address;
6379    profile->mSupportedDevices.add(devDesc);
6380
6381    mOutputProfiles.add(profile);
6382
6383    return NO_ERROR;
6384}
6385
6386status_t AudioPolicyManager::HwModule::removeOutputProfile(String8 name)
6387{
6388    for (size_t i = 0; i < mOutputProfiles.size(); i++) {
6389        if (mOutputProfiles[i]->mName == name) {
6390            mOutputProfiles.removeAt(i);
6391            break;
6392        }
6393    }
6394
6395    return NO_ERROR;
6396}
6397
6398status_t AudioPolicyManager::HwModule::addInputProfile(String8 name, const audio_config_t *config,
6399                                                  audio_devices_t device, String8 address)
6400{
6401    sp<IOProfile> profile = new IOProfile(name, AUDIO_PORT_ROLE_SINK, this);
6402
6403    profile->mSamplingRates.add(config->sample_rate);
6404    profile->mChannelMasks.add(config->channel_mask);
6405    profile->mFormats.add(config->format);
6406
6407    sp<DeviceDescriptor> devDesc = new DeviceDescriptor(String8(""), device);
6408    devDesc->mAddress = address;
6409    profile->mSupportedDevices.add(devDesc);
6410
6411    ALOGV("addInputProfile() name %s rate %d mask 0x08", name.string(), config->sample_rate, config->channel_mask);
6412
6413    mInputProfiles.add(profile);
6414
6415    return NO_ERROR;
6416}
6417
6418status_t AudioPolicyManager::HwModule::removeInputProfile(String8 name)
6419{
6420    for (size_t i = 0; i < mInputProfiles.size(); i++) {
6421        if (mInputProfiles[i]->mName == name) {
6422            mInputProfiles.removeAt(i);
6423            break;
6424        }
6425    }
6426
6427    return NO_ERROR;
6428}
6429
6430
6431void AudioPolicyManager::HwModule::dump(int fd)
6432{
6433    const size_t SIZE = 256;
6434    char buffer[SIZE];
6435    String8 result;
6436
6437    snprintf(buffer, SIZE, "  - name: %s\n", mName);
6438    result.append(buffer);
6439    snprintf(buffer, SIZE, "  - handle: %d\n", mHandle);
6440    result.append(buffer);
6441    snprintf(buffer, SIZE, "  - version: %u.%u\n", mHalVersion >> 8, mHalVersion & 0xFF);
6442    result.append(buffer);
6443    write(fd, result.string(), result.size());
6444    if (mOutputProfiles.size()) {
6445        write(fd, "  - outputs:\n", strlen("  - outputs:\n"));
6446        for (size_t i = 0; i < mOutputProfiles.size(); i++) {
6447            snprintf(buffer, SIZE, "    output %zu:\n", i);
6448            write(fd, buffer, strlen(buffer));
6449            mOutputProfiles[i]->dump(fd);
6450        }
6451    }
6452    if (mInputProfiles.size()) {
6453        write(fd, "  - inputs:\n", strlen("  - inputs:\n"));
6454        for (size_t i = 0; i < mInputProfiles.size(); i++) {
6455            snprintf(buffer, SIZE, "    input %zu:\n", i);
6456            write(fd, buffer, strlen(buffer));
6457            mInputProfiles[i]->dump(fd);
6458        }
6459    }
6460    if (mDeclaredDevices.size()) {
6461        write(fd, "  - devices:\n", strlen("  - devices:\n"));
6462        for (size_t i = 0; i < mDeclaredDevices.size(); i++) {
6463            mDeclaredDevices[i]->dump(fd, 4, i);
6464        }
6465    }
6466}
6467
6468// --- AudioPort class implementation
6469
6470
6471AudioPolicyManager::AudioPort::AudioPort(const String8& name, audio_port_type_t type,
6472          audio_port_role_t role, const sp<HwModule>& module) :
6473    mName(name), mType(type), mRole(role), mModule(module), mFlags(0)
6474{
6475    mUseInChannelMask = ((type == AUDIO_PORT_TYPE_DEVICE) && (role == AUDIO_PORT_ROLE_SOURCE)) ||
6476                    ((type == AUDIO_PORT_TYPE_MIX) && (role == AUDIO_PORT_ROLE_SINK));
6477}
6478
6479void AudioPolicyManager::AudioPort::toAudioPort(struct audio_port *port) const
6480{
6481    port->role = mRole;
6482    port->type = mType;
6483    unsigned int i;
6484    for (i = 0; i < mSamplingRates.size() && i < AUDIO_PORT_MAX_SAMPLING_RATES; i++) {
6485        if (mSamplingRates[i] != 0) {
6486            port->sample_rates[i] = mSamplingRates[i];
6487        }
6488    }
6489    port->num_sample_rates = i;
6490    for (i = 0; i < mChannelMasks.size() && i < AUDIO_PORT_MAX_CHANNEL_MASKS; i++) {
6491        if (mChannelMasks[i] != 0) {
6492            port->channel_masks[i] = mChannelMasks[i];
6493        }
6494    }
6495    port->num_channel_masks = i;
6496    for (i = 0; i < mFormats.size() && i < AUDIO_PORT_MAX_FORMATS; i++) {
6497        if (mFormats[i] != 0) {
6498            port->formats[i] = mFormats[i];
6499        }
6500    }
6501    port->num_formats = i;
6502
6503    ALOGV("AudioPort::toAudioPort() num gains %zu", mGains.size());
6504
6505    for (i = 0; i < mGains.size() && i < AUDIO_PORT_MAX_GAINS; i++) {
6506        port->gains[i] = mGains[i]->mGain;
6507    }
6508    port->num_gains = i;
6509}
6510
6511void AudioPolicyManager::AudioPort::importAudioPort(const sp<AudioPort> port) {
6512    for (size_t k = 0 ; k < port->mSamplingRates.size() ; k++) {
6513        const uint32_t rate = port->mSamplingRates.itemAt(k);
6514        if (rate != 0) { // skip "dynamic" rates
6515            bool hasRate = false;
6516            for (size_t l = 0 ; l < mSamplingRates.size() ; l++) {
6517                if (rate == mSamplingRates.itemAt(l)) {
6518                    hasRate = true;
6519                    break;
6520                }
6521            }
6522            if (!hasRate) { // never import a sampling rate twice
6523                mSamplingRates.add(rate);
6524            }
6525        }
6526    }
6527    for (size_t k = 0 ; k < port->mChannelMasks.size() ; k++) {
6528        const audio_channel_mask_t mask = port->mChannelMasks.itemAt(k);
6529        if (mask != 0) { // skip "dynamic" masks
6530            bool hasMask = false;
6531            for (size_t l = 0 ; l < mChannelMasks.size() ; l++) {
6532                if (mask == mChannelMasks.itemAt(l)) {
6533                    hasMask = true;
6534                    break;
6535                }
6536            }
6537            if (!hasMask) { // never import a channel mask twice
6538                mChannelMasks.add(mask);
6539            }
6540        }
6541    }
6542    for (size_t k = 0 ; k < port->mFormats.size() ; k++) {
6543        const audio_format_t format = port->mFormats.itemAt(k);
6544        if (format != 0) { // skip "dynamic" formats
6545            bool hasFormat = false;
6546            for (size_t l = 0 ; l < mFormats.size() ; l++) {
6547                if (format == mFormats.itemAt(l)) {
6548                    hasFormat = true;
6549                    break;
6550                }
6551            }
6552            if (!hasFormat) { // never import a channel mask twice
6553                mFormats.add(format);
6554            }
6555        }
6556    }
6557    for (size_t k = 0 ; k < port->mGains.size() ; k++) {
6558        sp<AudioGain> gain = port->mGains.itemAt(k);
6559        if (gain != 0) {
6560            bool hasGain = false;
6561            for (size_t l = 0 ; l < mGains.size() ; l++) {
6562                if (gain == mGains.itemAt(l)) {
6563                    hasGain = true;
6564                    break;
6565                }
6566            }
6567            if (!hasGain) { // never import a gain twice
6568                mGains.add(gain);
6569            }
6570        }
6571    }
6572}
6573
6574void AudioPolicyManager::AudioPort::clearCapabilities() {
6575    mChannelMasks.clear();
6576    mFormats.clear();
6577    mSamplingRates.clear();
6578    mGains.clear();
6579}
6580
6581void AudioPolicyManager::AudioPort::loadSamplingRates(char *name)
6582{
6583    char *str = strtok(name, "|");
6584
6585    // by convention, "0' in the first entry in mSamplingRates indicates the supported sampling
6586    // rates should be read from the output stream after it is opened for the first time
6587    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
6588        mSamplingRates.add(0);
6589        return;
6590    }
6591
6592    while (str != NULL) {
6593        uint32_t rate = atoi(str);
6594        if (rate != 0) {
6595            ALOGV("loadSamplingRates() adding rate %d", rate);
6596            mSamplingRates.add(rate);
6597        }
6598        str = strtok(NULL, "|");
6599    }
6600}
6601
6602void AudioPolicyManager::AudioPort::loadFormats(char *name)
6603{
6604    char *str = strtok(name, "|");
6605
6606    // by convention, "0' in the first entry in mFormats indicates the supported formats
6607    // should be read from the output stream after it is opened for the first time
6608    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
6609        mFormats.add(AUDIO_FORMAT_DEFAULT);
6610        return;
6611    }
6612
6613    while (str != NULL) {
6614        audio_format_t format = (audio_format_t)stringToEnum(sFormatNameToEnumTable,
6615                                                             ARRAY_SIZE(sFormatNameToEnumTable),
6616                                                             str);
6617        if (format != AUDIO_FORMAT_DEFAULT) {
6618            mFormats.add(format);
6619        }
6620        str = strtok(NULL, "|");
6621    }
6622}
6623
6624void AudioPolicyManager::AudioPort::loadInChannels(char *name)
6625{
6626    const char *str = strtok(name, "|");
6627
6628    ALOGV("loadInChannels() %s", name);
6629
6630    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
6631        mChannelMasks.add(0);
6632        return;
6633    }
6634
6635    while (str != NULL) {
6636        audio_channel_mask_t channelMask =
6637                (audio_channel_mask_t)stringToEnum(sInChannelsNameToEnumTable,
6638                                                   ARRAY_SIZE(sInChannelsNameToEnumTable),
6639                                                   str);
6640        if (channelMask != 0) {
6641            ALOGV("loadInChannels() adding channelMask %04x", channelMask);
6642            mChannelMasks.add(channelMask);
6643        }
6644        str = strtok(NULL, "|");
6645    }
6646}
6647
6648void AudioPolicyManager::AudioPort::loadOutChannels(char *name)
6649{
6650    const char *str = strtok(name, "|");
6651
6652    ALOGV("loadOutChannels() %s", name);
6653
6654    // by convention, "0' in the first entry in mChannelMasks indicates the supported channel
6655    // masks should be read from the output stream after it is opened for the first time
6656    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
6657        mChannelMasks.add(0);
6658        return;
6659    }
6660
6661    while (str != NULL) {
6662        audio_channel_mask_t channelMask =
6663                (audio_channel_mask_t)stringToEnum(sOutChannelsNameToEnumTable,
6664                                                   ARRAY_SIZE(sOutChannelsNameToEnumTable),
6665                                                   str);
6666        if (channelMask != 0) {
6667            mChannelMasks.add(channelMask);
6668        }
6669        str = strtok(NULL, "|");
6670    }
6671    return;
6672}
6673
6674audio_gain_mode_t AudioPolicyManager::AudioPort::loadGainMode(char *name)
6675{
6676    const char *str = strtok(name, "|");
6677
6678    ALOGV("loadGainMode() %s", name);
6679    audio_gain_mode_t mode = 0;
6680    while (str != NULL) {
6681        mode |= (audio_gain_mode_t)stringToEnum(sGainModeNameToEnumTable,
6682                                                ARRAY_SIZE(sGainModeNameToEnumTable),
6683                                                str);
6684        str = strtok(NULL, "|");
6685    }
6686    return mode;
6687}
6688
6689void AudioPolicyManager::AudioPort::loadGain(cnode *root, int index)
6690{
6691    cnode *node = root->first_child;
6692
6693    sp<AudioGain> gain = new AudioGain(index, mUseInChannelMask);
6694
6695    while (node) {
6696        if (strcmp(node->name, GAIN_MODE) == 0) {
6697            gain->mGain.mode = loadGainMode((char *)node->value);
6698        } else if (strcmp(node->name, GAIN_CHANNELS) == 0) {
6699            if (mUseInChannelMask) {
6700                gain->mGain.channel_mask =
6701                        (audio_channel_mask_t)stringToEnum(sInChannelsNameToEnumTable,
6702                                                           ARRAY_SIZE(sInChannelsNameToEnumTable),
6703                                                           (char *)node->value);
6704            } else {
6705                gain->mGain.channel_mask =
6706                        (audio_channel_mask_t)stringToEnum(sOutChannelsNameToEnumTable,
6707                                                           ARRAY_SIZE(sOutChannelsNameToEnumTable),
6708                                                           (char *)node->value);
6709            }
6710        } else if (strcmp(node->name, GAIN_MIN_VALUE) == 0) {
6711            gain->mGain.min_value = atoi((char *)node->value);
6712        } else if (strcmp(node->name, GAIN_MAX_VALUE) == 0) {
6713            gain->mGain.max_value = atoi((char *)node->value);
6714        } else if (strcmp(node->name, GAIN_DEFAULT_VALUE) == 0) {
6715            gain->mGain.default_value = atoi((char *)node->value);
6716        } else if (strcmp(node->name, GAIN_STEP_VALUE) == 0) {
6717            gain->mGain.step_value = atoi((char *)node->value);
6718        } else if (strcmp(node->name, GAIN_MIN_RAMP_MS) == 0) {
6719            gain->mGain.min_ramp_ms = atoi((char *)node->value);
6720        } else if (strcmp(node->name, GAIN_MAX_RAMP_MS) == 0) {
6721            gain->mGain.max_ramp_ms = atoi((char *)node->value);
6722        }
6723        node = node->next;
6724    }
6725
6726    ALOGV("loadGain() adding new gain mode %08x channel mask %08x min mB %d max mB %d",
6727          gain->mGain.mode, gain->mGain.channel_mask, gain->mGain.min_value, gain->mGain.max_value);
6728
6729    if (gain->mGain.mode == 0) {
6730        return;
6731    }
6732    mGains.add(gain);
6733}
6734
6735void AudioPolicyManager::AudioPort::loadGains(cnode *root)
6736{
6737    cnode *node = root->first_child;
6738    int index = 0;
6739    while (node) {
6740        ALOGV("loadGains() loading gain %s", node->name);
6741        loadGain(node, index++);
6742        node = node->next;
6743    }
6744}
6745
6746status_t AudioPolicyManager::AudioPort::checkExactSamplingRate(uint32_t samplingRate) const
6747{
6748    if (mSamplingRates.isEmpty()) {
6749        return NO_ERROR;
6750    }
6751
6752    for (size_t i = 0; i < mSamplingRates.size(); i ++) {
6753        if (mSamplingRates[i] == samplingRate) {
6754            return NO_ERROR;
6755        }
6756    }
6757    return BAD_VALUE;
6758}
6759
6760status_t AudioPolicyManager::AudioPort::checkCompatibleSamplingRate(uint32_t samplingRate,
6761        uint32_t *updatedSamplingRate) const
6762{
6763    if (mSamplingRates.isEmpty()) {
6764        return NO_ERROR;
6765    }
6766
6767    // Search for the closest supported sampling rate that is above (preferred)
6768    // or below (acceptable) the desired sampling rate, within a permitted ratio.
6769    // The sampling rates do not need to be sorted in ascending order.
6770    ssize_t maxBelow = -1;
6771    ssize_t minAbove = -1;
6772    uint32_t candidate;
6773    for (size_t i = 0; i < mSamplingRates.size(); i++) {
6774        candidate = mSamplingRates[i];
6775        if (candidate == samplingRate) {
6776            if (updatedSamplingRate != NULL) {
6777                *updatedSamplingRate = candidate;
6778            }
6779            return NO_ERROR;
6780        }
6781        // candidate < desired
6782        if (candidate < samplingRate) {
6783            if (maxBelow < 0 || candidate > mSamplingRates[maxBelow]) {
6784                maxBelow = i;
6785            }
6786        // candidate > desired
6787        } else {
6788            if (minAbove < 0 || candidate < mSamplingRates[minAbove]) {
6789                minAbove = i;
6790            }
6791        }
6792    }
6793    // This uses hard-coded knowledge about AudioFlinger resampling ratios.
6794    // TODO Move these assumptions out.
6795    static const uint32_t kMaxDownSampleRatio = 6;  // beyond this aliasing occurs
6796    static const uint32_t kMaxUpSampleRatio = 256;  // beyond this sample rate inaccuracies occur
6797                                                    // due to approximation by an int32_t of the
6798                                                    // phase increments
6799    // Prefer to down-sample from a higher sampling rate, as we get the desired frequency spectrum.
6800    if (minAbove >= 0) {
6801        candidate = mSamplingRates[minAbove];
6802        if (candidate / kMaxDownSampleRatio <= samplingRate) {
6803            if (updatedSamplingRate != NULL) {
6804                *updatedSamplingRate = candidate;
6805            }
6806            return NO_ERROR;
6807        }
6808    }
6809    // But if we have to up-sample from a lower sampling rate, that's OK.
6810    if (maxBelow >= 0) {
6811        candidate = mSamplingRates[maxBelow];
6812        if (candidate * kMaxUpSampleRatio >= samplingRate) {
6813            if (updatedSamplingRate != NULL) {
6814                *updatedSamplingRate = candidate;
6815            }
6816            return NO_ERROR;
6817        }
6818    }
6819    // leave updatedSamplingRate unmodified
6820    return BAD_VALUE;
6821}
6822
6823status_t AudioPolicyManager::AudioPort::checkExactChannelMask(audio_channel_mask_t channelMask) const
6824{
6825    if (mChannelMasks.isEmpty()) {
6826        return NO_ERROR;
6827    }
6828
6829    for (size_t i = 0; i < mChannelMasks.size(); i++) {
6830        if (mChannelMasks[i] == channelMask) {
6831            return NO_ERROR;
6832        }
6833    }
6834    return BAD_VALUE;
6835}
6836
6837status_t AudioPolicyManager::AudioPort::checkCompatibleChannelMask(audio_channel_mask_t channelMask)
6838        const
6839{
6840    if (mChannelMasks.isEmpty()) {
6841        return NO_ERROR;
6842    }
6843
6844    const bool isRecordThread = mType == AUDIO_PORT_TYPE_MIX && mRole == AUDIO_PORT_ROLE_SINK;
6845    for (size_t i = 0; i < mChannelMasks.size(); i ++) {
6846        // FIXME Does not handle multi-channel automatic conversions yet
6847        audio_channel_mask_t supported = mChannelMasks[i];
6848        if (supported == channelMask) {
6849            return NO_ERROR;
6850        }
6851        if (isRecordThread) {
6852            // This uses hard-coded knowledge that AudioFlinger can silently down-mix and up-mix.
6853            // FIXME Abstract this out to a table.
6854            if (((supported == AUDIO_CHANNEL_IN_FRONT_BACK || supported == AUDIO_CHANNEL_IN_STEREO)
6855                    && channelMask == AUDIO_CHANNEL_IN_MONO) ||
6856                (supported == AUDIO_CHANNEL_IN_MONO && (channelMask == AUDIO_CHANNEL_IN_FRONT_BACK
6857                    || channelMask == AUDIO_CHANNEL_IN_STEREO))) {
6858                return NO_ERROR;
6859            }
6860        }
6861    }
6862    return BAD_VALUE;
6863}
6864
6865status_t AudioPolicyManager::AudioPort::checkFormat(audio_format_t format) const
6866{
6867    if (mFormats.isEmpty()) {
6868        return NO_ERROR;
6869    }
6870
6871    for (size_t i = 0; i < mFormats.size(); i ++) {
6872        if (mFormats[i] == format) {
6873            return NO_ERROR;
6874        }
6875    }
6876    return BAD_VALUE;
6877}
6878
6879
6880uint32_t AudioPolicyManager::AudioPort::pickSamplingRate() const
6881{
6882    // special case for uninitialized dynamic profile
6883    if (mSamplingRates.size() == 1 && mSamplingRates[0] == 0) {
6884        return 0;
6885    }
6886
6887    // For direct outputs, pick minimum sampling rate: this helps ensuring that the
6888    // channel count / sampling rate combination chosen will be supported by the connected
6889    // sink
6890    if ((mType == AUDIO_PORT_TYPE_MIX) && (mRole == AUDIO_PORT_ROLE_SOURCE) &&
6891            (mFlags & (AUDIO_OUTPUT_FLAG_DIRECT | AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD))) {
6892        uint32_t samplingRate = UINT_MAX;
6893        for (size_t i = 0; i < mSamplingRates.size(); i ++) {
6894            if ((mSamplingRates[i] < samplingRate) && (mSamplingRates[i] > 0)) {
6895                samplingRate = mSamplingRates[i];
6896            }
6897        }
6898        return (samplingRate == UINT_MAX) ? 0 : samplingRate;
6899    }
6900
6901    uint32_t samplingRate = 0;
6902    uint32_t maxRate = MAX_MIXER_SAMPLING_RATE;
6903
6904    // For mixed output and inputs, use max mixer sampling rates. Do not
6905    // limit sampling rate otherwise
6906    if (mType != AUDIO_PORT_TYPE_MIX) {
6907        maxRate = UINT_MAX;
6908    }
6909    for (size_t i = 0; i < mSamplingRates.size(); i ++) {
6910        if ((mSamplingRates[i] > samplingRate) && (mSamplingRates[i] <= maxRate)) {
6911            samplingRate = mSamplingRates[i];
6912        }
6913    }
6914    return samplingRate;
6915}
6916
6917audio_channel_mask_t AudioPolicyManager::AudioPort::pickChannelMask() const
6918{
6919    // special case for uninitialized dynamic profile
6920    if (mChannelMasks.size() == 1 && mChannelMasks[0] == 0) {
6921        return AUDIO_CHANNEL_NONE;
6922    }
6923    audio_channel_mask_t channelMask = AUDIO_CHANNEL_NONE;
6924
6925    // For direct outputs, pick minimum channel count: this helps ensuring that the
6926    // channel count / sampling rate combination chosen will be supported by the connected
6927    // sink
6928    if ((mType == AUDIO_PORT_TYPE_MIX) && (mRole == AUDIO_PORT_ROLE_SOURCE) &&
6929            (mFlags & (AUDIO_OUTPUT_FLAG_DIRECT | AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD))) {
6930        uint32_t channelCount = UINT_MAX;
6931        for (size_t i = 0; i < mChannelMasks.size(); i ++) {
6932            uint32_t cnlCount;
6933            if (mUseInChannelMask) {
6934                cnlCount = audio_channel_count_from_in_mask(mChannelMasks[i]);
6935            } else {
6936                cnlCount = audio_channel_count_from_out_mask(mChannelMasks[i]);
6937            }
6938            if ((cnlCount < channelCount) && (cnlCount > 0)) {
6939                channelMask = mChannelMasks[i];
6940                channelCount = cnlCount;
6941            }
6942        }
6943        return channelMask;
6944    }
6945
6946    uint32_t channelCount = 0;
6947    uint32_t maxCount = MAX_MIXER_CHANNEL_COUNT;
6948
6949    // For mixed output and inputs, use max mixer channel count. Do not
6950    // limit channel count otherwise
6951    if (mType != AUDIO_PORT_TYPE_MIX) {
6952        maxCount = UINT_MAX;
6953    }
6954    for (size_t i = 0; i < mChannelMasks.size(); i ++) {
6955        uint32_t cnlCount;
6956        if (mUseInChannelMask) {
6957            cnlCount = audio_channel_count_from_in_mask(mChannelMasks[i]);
6958        } else {
6959            cnlCount = audio_channel_count_from_out_mask(mChannelMasks[i]);
6960        }
6961        if ((cnlCount > channelCount) && (cnlCount <= maxCount)) {
6962            channelMask = mChannelMasks[i];
6963            channelCount = cnlCount;
6964        }
6965    }
6966    return channelMask;
6967}
6968
6969/* format in order of increasing preference */
6970const audio_format_t AudioPolicyManager::AudioPort::sPcmFormatCompareTable[] = {
6971        AUDIO_FORMAT_DEFAULT,
6972        AUDIO_FORMAT_PCM_16_BIT,
6973        AUDIO_FORMAT_PCM_8_24_BIT,
6974        AUDIO_FORMAT_PCM_24_BIT_PACKED,
6975        AUDIO_FORMAT_PCM_32_BIT,
6976        AUDIO_FORMAT_PCM_FLOAT,
6977};
6978
6979int AudioPolicyManager::AudioPort::compareFormats(audio_format_t format1,
6980                                                  audio_format_t format2)
6981{
6982    // NOTE: AUDIO_FORMAT_INVALID is also considered not PCM and will be compared equal to any
6983    // compressed format and better than any PCM format. This is by design of pickFormat()
6984    if (!audio_is_linear_pcm(format1)) {
6985        if (!audio_is_linear_pcm(format2)) {
6986            return 0;
6987        }
6988        return 1;
6989    }
6990    if (!audio_is_linear_pcm(format2)) {
6991        return -1;
6992    }
6993
6994    int index1 = -1, index2 = -1;
6995    for (size_t i = 0;
6996            (i < ARRAY_SIZE(sPcmFormatCompareTable)) && ((index1 == -1) || (index2 == -1));
6997            i ++) {
6998        if (sPcmFormatCompareTable[i] == format1) {
6999            index1 = i;
7000        }
7001        if (sPcmFormatCompareTable[i] == format2) {
7002            index2 = i;
7003        }
7004    }
7005    // format1 not found => index1 < 0 => format2 > format1
7006    // format2 not found => index2 < 0 => format2 < format1
7007    return index1 - index2;
7008}
7009
7010audio_format_t AudioPolicyManager::AudioPort::pickFormat() const
7011{
7012    // special case for uninitialized dynamic profile
7013    if (mFormats.size() == 1 && mFormats[0] == 0) {
7014        return AUDIO_FORMAT_DEFAULT;
7015    }
7016
7017    audio_format_t format = AUDIO_FORMAT_DEFAULT;
7018    audio_format_t bestFormat =
7019            AudioPolicyManager::AudioPort::sPcmFormatCompareTable[
7020                ARRAY_SIZE(AudioPolicyManager::AudioPort::sPcmFormatCompareTable) - 1];
7021    // For mixed output and inputs, use best mixer output format. Do not
7022    // limit format otherwise
7023    if ((mType != AUDIO_PORT_TYPE_MIX) ||
7024            ((mRole == AUDIO_PORT_ROLE_SOURCE) &&
7025             (((mFlags & (AUDIO_OUTPUT_FLAG_DIRECT | AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD)) != 0)))) {
7026        bestFormat = AUDIO_FORMAT_INVALID;
7027    }
7028
7029    for (size_t i = 0; i < mFormats.size(); i ++) {
7030        if ((compareFormats(mFormats[i], format) > 0) &&
7031                (compareFormats(mFormats[i], bestFormat) <= 0)) {
7032            format = mFormats[i];
7033        }
7034    }
7035    return format;
7036}
7037
7038status_t AudioPolicyManager::AudioPort::checkGain(const struct audio_gain_config *gainConfig,
7039                                                  int index) const
7040{
7041    if (index < 0 || (size_t)index >= mGains.size()) {
7042        return BAD_VALUE;
7043    }
7044    return mGains[index]->checkConfig(gainConfig);
7045}
7046
7047void AudioPolicyManager::AudioPort::dump(int fd, int spaces) const
7048{
7049    const size_t SIZE = 256;
7050    char buffer[SIZE];
7051    String8 result;
7052
7053    if (mName.size() != 0) {
7054        snprintf(buffer, SIZE, "%*s- name: %s\n", spaces, "", mName.string());
7055        result.append(buffer);
7056    }
7057
7058    if (mSamplingRates.size() != 0) {
7059        snprintf(buffer, SIZE, "%*s- sampling rates: ", spaces, "");
7060        result.append(buffer);
7061        for (size_t i = 0; i < mSamplingRates.size(); i++) {
7062            if (i == 0 && mSamplingRates[i] == 0) {
7063                snprintf(buffer, SIZE, "Dynamic");
7064            } else {
7065                snprintf(buffer, SIZE, "%d", mSamplingRates[i]);
7066            }
7067            result.append(buffer);
7068            result.append(i == (mSamplingRates.size() - 1) ? "" : ", ");
7069        }
7070        result.append("\n");
7071    }
7072
7073    if (mChannelMasks.size() != 0) {
7074        snprintf(buffer, SIZE, "%*s- channel masks: ", spaces, "");
7075        result.append(buffer);
7076        for (size_t i = 0; i < mChannelMasks.size(); i++) {
7077            ALOGV("AudioPort::dump mChannelMasks %zu %08x", i, mChannelMasks[i]);
7078
7079            if (i == 0 && mChannelMasks[i] == 0) {
7080                snprintf(buffer, SIZE, "Dynamic");
7081            } else {
7082                snprintf(buffer, SIZE, "0x%04x", mChannelMasks[i]);
7083            }
7084            result.append(buffer);
7085            result.append(i == (mChannelMasks.size() - 1) ? "" : ", ");
7086        }
7087        result.append("\n");
7088    }
7089
7090    if (mFormats.size() != 0) {
7091        snprintf(buffer, SIZE, "%*s- formats: ", spaces, "");
7092        result.append(buffer);
7093        for (size_t i = 0; i < mFormats.size(); i++) {
7094            const char *formatStr = enumToString(sFormatNameToEnumTable,
7095                                                 ARRAY_SIZE(sFormatNameToEnumTable),
7096                                                 mFormats[i]);
7097            if (i == 0 && strcmp(formatStr, "") == 0) {
7098                snprintf(buffer, SIZE, "Dynamic");
7099            } else {
7100                snprintf(buffer, SIZE, "%s", formatStr);
7101            }
7102            result.append(buffer);
7103            result.append(i == (mFormats.size() - 1) ? "" : ", ");
7104        }
7105        result.append("\n");
7106    }
7107    write(fd, result.string(), result.size());
7108    if (mGains.size() != 0) {
7109        snprintf(buffer, SIZE, "%*s- gains:\n", spaces, "");
7110        write(fd, buffer, strlen(buffer) + 1);
7111        result.append(buffer);
7112        for (size_t i = 0; i < mGains.size(); i++) {
7113            mGains[i]->dump(fd, spaces + 2, i);
7114        }
7115    }
7116}
7117
7118// --- AudioGain class implementation
7119
7120AudioPolicyManager::AudioGain::AudioGain(int index, bool useInChannelMask)
7121{
7122    mIndex = index;
7123    mUseInChannelMask = useInChannelMask;
7124    memset(&mGain, 0, sizeof(struct audio_gain));
7125}
7126
7127void AudioPolicyManager::AudioGain::getDefaultConfig(struct audio_gain_config *config)
7128{
7129    config->index = mIndex;
7130    config->mode = mGain.mode;
7131    config->channel_mask = mGain.channel_mask;
7132    if ((mGain.mode & AUDIO_GAIN_MODE_JOINT) == AUDIO_GAIN_MODE_JOINT) {
7133        config->values[0] = mGain.default_value;
7134    } else {
7135        uint32_t numValues;
7136        if (mUseInChannelMask) {
7137            numValues = audio_channel_count_from_in_mask(mGain.channel_mask);
7138        } else {
7139            numValues = audio_channel_count_from_out_mask(mGain.channel_mask);
7140        }
7141        for (size_t i = 0; i < numValues; i++) {
7142            config->values[i] = mGain.default_value;
7143        }
7144    }
7145    if ((mGain.mode & AUDIO_GAIN_MODE_RAMP) == AUDIO_GAIN_MODE_RAMP) {
7146        config->ramp_duration_ms = mGain.min_ramp_ms;
7147    }
7148}
7149
7150status_t AudioPolicyManager::AudioGain::checkConfig(const struct audio_gain_config *config)
7151{
7152    if ((config->mode & ~mGain.mode) != 0) {
7153        return BAD_VALUE;
7154    }
7155    if ((config->mode & AUDIO_GAIN_MODE_JOINT) == AUDIO_GAIN_MODE_JOINT) {
7156        if ((config->values[0] < mGain.min_value) ||
7157                    (config->values[0] > mGain.max_value)) {
7158            return BAD_VALUE;
7159        }
7160    } else {
7161        if ((config->channel_mask & ~mGain.channel_mask) != 0) {
7162            return BAD_VALUE;
7163        }
7164        uint32_t numValues;
7165        if (mUseInChannelMask) {
7166            numValues = audio_channel_count_from_in_mask(config->channel_mask);
7167        } else {
7168            numValues = audio_channel_count_from_out_mask(config->channel_mask);
7169        }
7170        for (size_t i = 0; i < numValues; i++) {
7171            if ((config->values[i] < mGain.min_value) ||
7172                    (config->values[i] > mGain.max_value)) {
7173                return BAD_VALUE;
7174            }
7175        }
7176    }
7177    if ((config->mode & AUDIO_GAIN_MODE_RAMP) == AUDIO_GAIN_MODE_RAMP) {
7178        if ((config->ramp_duration_ms < mGain.min_ramp_ms) ||
7179                    (config->ramp_duration_ms > mGain.max_ramp_ms)) {
7180            return BAD_VALUE;
7181        }
7182    }
7183    return NO_ERROR;
7184}
7185
7186void AudioPolicyManager::AudioGain::dump(int fd, int spaces, int index) const
7187{
7188    const size_t SIZE = 256;
7189    char buffer[SIZE];
7190    String8 result;
7191
7192    snprintf(buffer, SIZE, "%*sGain %d:\n", spaces, "", index+1);
7193    result.append(buffer);
7194    snprintf(buffer, SIZE, "%*s- mode: %08x\n", spaces, "", mGain.mode);
7195    result.append(buffer);
7196    snprintf(buffer, SIZE, "%*s- channel_mask: %08x\n", spaces, "", mGain.channel_mask);
7197    result.append(buffer);
7198    snprintf(buffer, SIZE, "%*s- min_value: %d mB\n", spaces, "", mGain.min_value);
7199    result.append(buffer);
7200    snprintf(buffer, SIZE, "%*s- max_value: %d mB\n", spaces, "", mGain.max_value);
7201    result.append(buffer);
7202    snprintf(buffer, SIZE, "%*s- default_value: %d mB\n", spaces, "", mGain.default_value);
7203    result.append(buffer);
7204    snprintf(buffer, SIZE, "%*s- step_value: %d mB\n", spaces, "", mGain.step_value);
7205    result.append(buffer);
7206    snprintf(buffer, SIZE, "%*s- min_ramp_ms: %d ms\n", spaces, "", mGain.min_ramp_ms);
7207    result.append(buffer);
7208    snprintf(buffer, SIZE, "%*s- max_ramp_ms: %d ms\n", spaces, "", mGain.max_ramp_ms);
7209    result.append(buffer);
7210
7211    write(fd, result.string(), result.size());
7212}
7213
7214// --- AudioPortConfig class implementation
7215
7216AudioPolicyManager::AudioPortConfig::AudioPortConfig()
7217{
7218    mSamplingRate = 0;
7219    mChannelMask = AUDIO_CHANNEL_NONE;
7220    mFormat = AUDIO_FORMAT_INVALID;
7221    mGain.index = -1;
7222}
7223
7224status_t AudioPolicyManager::AudioPortConfig::applyAudioPortConfig(
7225                                                        const struct audio_port_config *config,
7226                                                        struct audio_port_config *backupConfig)
7227{
7228    struct audio_port_config localBackupConfig;
7229    status_t status = NO_ERROR;
7230
7231    localBackupConfig.config_mask = config->config_mask;
7232    toAudioPortConfig(&localBackupConfig);
7233
7234    sp<AudioPort> audioport = getAudioPort();
7235    if (audioport == 0) {
7236        status = NO_INIT;
7237        goto exit;
7238    }
7239    if (config->config_mask & AUDIO_PORT_CONFIG_SAMPLE_RATE) {
7240        status = audioport->checkExactSamplingRate(config->sample_rate);
7241        if (status != NO_ERROR) {
7242            goto exit;
7243        }
7244        mSamplingRate = config->sample_rate;
7245    }
7246    if (config->config_mask & AUDIO_PORT_CONFIG_CHANNEL_MASK) {
7247        status = audioport->checkExactChannelMask(config->channel_mask);
7248        if (status != NO_ERROR) {
7249            goto exit;
7250        }
7251        mChannelMask = config->channel_mask;
7252    }
7253    if (config->config_mask & AUDIO_PORT_CONFIG_FORMAT) {
7254        status = audioport->checkFormat(config->format);
7255        if (status != NO_ERROR) {
7256            goto exit;
7257        }
7258        mFormat = config->format;
7259    }
7260    if (config->config_mask & AUDIO_PORT_CONFIG_GAIN) {
7261        status = audioport->checkGain(&config->gain, config->gain.index);
7262        if (status != NO_ERROR) {
7263            goto exit;
7264        }
7265        mGain = config->gain;
7266    }
7267
7268exit:
7269    if (status != NO_ERROR) {
7270        applyAudioPortConfig(&localBackupConfig);
7271    }
7272    if (backupConfig != NULL) {
7273        *backupConfig = localBackupConfig;
7274    }
7275    return status;
7276}
7277
7278void AudioPolicyManager::AudioPortConfig::toAudioPortConfig(
7279                                                    struct audio_port_config *dstConfig,
7280                                                    const struct audio_port_config *srcConfig) const
7281{
7282    if (dstConfig->config_mask & AUDIO_PORT_CONFIG_SAMPLE_RATE) {
7283        dstConfig->sample_rate = mSamplingRate;
7284        if ((srcConfig != NULL) && (srcConfig->config_mask & AUDIO_PORT_CONFIG_SAMPLE_RATE)) {
7285            dstConfig->sample_rate = srcConfig->sample_rate;
7286        }
7287    } else {
7288        dstConfig->sample_rate = 0;
7289    }
7290    if (dstConfig->config_mask & AUDIO_PORT_CONFIG_CHANNEL_MASK) {
7291        dstConfig->channel_mask = mChannelMask;
7292        if ((srcConfig != NULL) && (srcConfig->config_mask & AUDIO_PORT_CONFIG_CHANNEL_MASK)) {
7293            dstConfig->channel_mask = srcConfig->channel_mask;
7294        }
7295    } else {
7296        dstConfig->channel_mask = AUDIO_CHANNEL_NONE;
7297    }
7298    if (dstConfig->config_mask & AUDIO_PORT_CONFIG_FORMAT) {
7299        dstConfig->format = mFormat;
7300        if ((srcConfig != NULL) && (srcConfig->config_mask & AUDIO_PORT_CONFIG_FORMAT)) {
7301            dstConfig->format = srcConfig->format;
7302        }
7303    } else {
7304        dstConfig->format = AUDIO_FORMAT_INVALID;
7305    }
7306    if (dstConfig->config_mask & AUDIO_PORT_CONFIG_GAIN) {
7307        dstConfig->gain = mGain;
7308        if ((srcConfig != NULL) && (srcConfig->config_mask & AUDIO_PORT_CONFIG_GAIN)) {
7309            dstConfig->gain = srcConfig->gain;
7310        }
7311    } else {
7312        dstConfig->gain.index = -1;
7313    }
7314    if (dstConfig->gain.index != -1) {
7315        dstConfig->config_mask |= AUDIO_PORT_CONFIG_GAIN;
7316    } else {
7317        dstConfig->config_mask &= ~AUDIO_PORT_CONFIG_GAIN;
7318    }
7319}
7320
7321// --- IOProfile class implementation
7322
7323AudioPolicyManager::IOProfile::IOProfile(const String8& name, audio_port_role_t role,
7324                                         const sp<HwModule>& module)
7325    : AudioPort(name, AUDIO_PORT_TYPE_MIX, role, module)
7326{
7327}
7328
7329AudioPolicyManager::IOProfile::~IOProfile()
7330{
7331}
7332
7333// checks if the IO profile is compatible with specified parameters.
7334// Sampling rate, format and channel mask must be specified in order to
7335// get a valid a match
7336bool AudioPolicyManager::IOProfile::isCompatibleProfile(audio_devices_t device,
7337                                                        String8 address,
7338                                                        uint32_t samplingRate,
7339                                                        uint32_t *updatedSamplingRate,
7340                                                        audio_format_t format,
7341                                                        audio_channel_mask_t channelMask,
7342                                                        uint32_t flags) const
7343{
7344    const bool isPlaybackThread = mType == AUDIO_PORT_TYPE_MIX && mRole == AUDIO_PORT_ROLE_SOURCE;
7345    const bool isRecordThread = mType == AUDIO_PORT_TYPE_MIX && mRole == AUDIO_PORT_ROLE_SINK;
7346    ALOG_ASSERT(isPlaybackThread != isRecordThread);
7347
7348    if (device != AUDIO_DEVICE_NONE && mSupportedDevices.getDevice(device, address) == 0) {
7349        return false;
7350    }
7351
7352    if (samplingRate == 0) {
7353         return false;
7354    }
7355    uint32_t myUpdatedSamplingRate = samplingRate;
7356    if (isPlaybackThread && checkExactSamplingRate(samplingRate) != NO_ERROR) {
7357         return false;
7358    }
7359    if (isRecordThread && checkCompatibleSamplingRate(samplingRate, &myUpdatedSamplingRate) !=
7360            NO_ERROR) {
7361         return false;
7362    }
7363
7364    if (!audio_is_valid_format(format) || checkFormat(format) != NO_ERROR) {
7365        return false;
7366    }
7367
7368    if (isPlaybackThread && (!audio_is_output_channel(channelMask) ||
7369            checkExactChannelMask(channelMask) != NO_ERROR)) {
7370        return false;
7371    }
7372    if (isRecordThread && (!audio_is_input_channel(channelMask) ||
7373            checkCompatibleChannelMask(channelMask) != NO_ERROR)) {
7374        return false;
7375    }
7376
7377    if (isPlaybackThread && (mFlags & flags) != flags) {
7378        return false;
7379    }
7380    // The only input flag that is allowed to be different is the fast flag.
7381    // An existing fast stream is compatible with a normal track request.
7382    // An existing normal stream is compatible with a fast track request,
7383    // but the fast request will be denied by AudioFlinger and converted to normal track.
7384    if (isRecordThread && ((mFlags ^ flags) &
7385            ~AUDIO_INPUT_FLAG_FAST)) {
7386        return false;
7387    }
7388
7389    if (updatedSamplingRate != NULL) {
7390        *updatedSamplingRate = myUpdatedSamplingRate;
7391    }
7392    return true;
7393}
7394
7395void AudioPolicyManager::IOProfile::dump(int fd)
7396{
7397    const size_t SIZE = 256;
7398    char buffer[SIZE];
7399    String8 result;
7400
7401    AudioPort::dump(fd, 4);
7402
7403    snprintf(buffer, SIZE, "    - flags: 0x%04x\n", mFlags);
7404    result.append(buffer);
7405    snprintf(buffer, SIZE, "    - devices:\n");
7406    result.append(buffer);
7407    write(fd, result.string(), result.size());
7408    for (size_t i = 0; i < mSupportedDevices.size(); i++) {
7409        mSupportedDevices[i]->dump(fd, 6, i);
7410    }
7411}
7412
7413void AudioPolicyManager::IOProfile::log()
7414{
7415    const size_t SIZE = 256;
7416    char buffer[SIZE];
7417    String8 result;
7418
7419    ALOGV("    - sampling rates: ");
7420    for (size_t i = 0; i < mSamplingRates.size(); i++) {
7421        ALOGV("  %d", mSamplingRates[i]);
7422    }
7423
7424    ALOGV("    - channel masks: ");
7425    for (size_t i = 0; i < mChannelMasks.size(); i++) {
7426        ALOGV("  0x%04x", mChannelMasks[i]);
7427    }
7428
7429    ALOGV("    - formats: ");
7430    for (size_t i = 0; i < mFormats.size(); i++) {
7431        ALOGV("  0x%08x", mFormats[i]);
7432    }
7433
7434    ALOGV("    - devices: 0x%04x\n", mSupportedDevices.types());
7435    ALOGV("    - flags: 0x%04x\n", mFlags);
7436}
7437
7438
7439// --- DeviceDescriptor implementation
7440
7441
7442AudioPolicyManager::DeviceDescriptor::DeviceDescriptor(const String8& name, audio_devices_t type) :
7443                     AudioPort(name, AUDIO_PORT_TYPE_DEVICE,
7444                               audio_is_output_device(type) ? AUDIO_PORT_ROLE_SINK :
7445                                                              AUDIO_PORT_ROLE_SOURCE,
7446                             NULL),
7447                     mDeviceType(type), mAddress(""), mId(0)
7448{
7449    if (mGains.size() > 0) {
7450        mGains[0]->getDefaultConfig(&mGain);
7451    }
7452}
7453
7454bool AudioPolicyManager::DeviceDescriptor::equals(const sp<DeviceDescriptor>& other) const
7455{
7456    // Devices are considered equal if they:
7457    // - are of the same type (a device type cannot be AUDIO_DEVICE_NONE)
7458    // - have the same address or one device does not specify the address
7459    // - have the same channel mask or one device does not specify the channel mask
7460    return (mDeviceType == other->mDeviceType) &&
7461           (mAddress == "" || other->mAddress == "" || mAddress == other->mAddress) &&
7462           (mChannelMask == 0 || other->mChannelMask == 0 ||
7463                mChannelMask == other->mChannelMask);
7464}
7465
7466void AudioPolicyManager::DeviceVector::refreshTypes()
7467{
7468    mDeviceTypes = AUDIO_DEVICE_NONE;
7469    for(size_t i = 0; i < size(); i++) {
7470        mDeviceTypes |= itemAt(i)->mDeviceType;
7471    }
7472    ALOGV("DeviceVector::refreshTypes() mDeviceTypes %08x", mDeviceTypes);
7473}
7474
7475ssize_t AudioPolicyManager::DeviceVector::indexOf(const sp<DeviceDescriptor>& item) const
7476{
7477    for(size_t i = 0; i < size(); i++) {
7478        if (item->equals(itemAt(i))) {
7479            return i;
7480        }
7481    }
7482    return -1;
7483}
7484
7485ssize_t AudioPolicyManager::DeviceVector::add(const sp<DeviceDescriptor>& item)
7486{
7487    ssize_t ret = indexOf(item);
7488
7489    if (ret < 0) {
7490        ret = SortedVector::add(item);
7491        if (ret >= 0) {
7492            refreshTypes();
7493        }
7494    } else {
7495        ALOGW("DeviceVector::add device %08x already in", item->mDeviceType);
7496        ret = -1;
7497    }
7498    return ret;
7499}
7500
7501ssize_t AudioPolicyManager::DeviceVector::remove(const sp<DeviceDescriptor>& item)
7502{
7503    size_t i;
7504    ssize_t ret = indexOf(item);
7505
7506    if (ret < 0) {
7507        ALOGW("DeviceVector::remove device %08x not in", item->mDeviceType);
7508    } else {
7509        ret = SortedVector::removeAt(ret);
7510        if (ret >= 0) {
7511            refreshTypes();
7512        }
7513    }
7514    return ret;
7515}
7516
7517void AudioPolicyManager::DeviceVector::loadDevicesFromType(audio_devices_t types)
7518{
7519    DeviceVector deviceList;
7520
7521    uint32_t role_bit = AUDIO_DEVICE_BIT_IN & types;
7522    types &= ~role_bit;
7523
7524    while (types) {
7525        uint32_t i = 31 - __builtin_clz(types);
7526        uint32_t type = 1 << i;
7527        types &= ~type;
7528        add(new DeviceDescriptor(String8(""), type | role_bit));
7529    }
7530}
7531
7532void AudioPolicyManager::DeviceVector::loadDevicesFromName(char *name,
7533                                                           const DeviceVector& declaredDevices)
7534{
7535    char *devName = strtok(name, "|");
7536    while (devName != NULL) {
7537        if (strlen(devName) != 0) {
7538            audio_devices_t type = stringToEnum(sDeviceNameToEnumTable,
7539                                 ARRAY_SIZE(sDeviceNameToEnumTable),
7540                                 devName);
7541            if (type != AUDIO_DEVICE_NONE) {
7542                sp<DeviceDescriptor> dev = new DeviceDescriptor(String8(""), type);
7543                if (type == AUDIO_DEVICE_IN_REMOTE_SUBMIX ||
7544                        type == AUDIO_DEVICE_OUT_REMOTE_SUBMIX ) {
7545                    dev->mAddress = String8("0");
7546                }
7547                add(dev);
7548            } else {
7549                sp<DeviceDescriptor> deviceDesc =
7550                        declaredDevices.getDeviceFromName(String8(devName));
7551                if (deviceDesc != 0) {
7552                    add(deviceDesc);
7553                }
7554            }
7555         }
7556         devName = strtok(NULL, "|");
7557     }
7558}
7559
7560sp<AudioPolicyManager::DeviceDescriptor> AudioPolicyManager::DeviceVector::getDevice(
7561                                                        audio_devices_t type, String8 address) const
7562{
7563    sp<DeviceDescriptor> device;
7564    for (size_t i = 0; i < size(); i++) {
7565        if (itemAt(i)->mDeviceType == type) {
7566            if (address == "" || itemAt(i)->mAddress == address) {
7567                device = itemAt(i);
7568                if (itemAt(i)->mAddress == address) {
7569                    break;
7570                }
7571            }
7572        }
7573    }
7574    ALOGV("DeviceVector::getDevice() for type %08x address %s found %p",
7575          type, address.string(), device.get());
7576    return device;
7577}
7578
7579sp<AudioPolicyManager::DeviceDescriptor> AudioPolicyManager::DeviceVector::getDeviceFromId(
7580                                                                    audio_port_handle_t id) const
7581{
7582    sp<DeviceDescriptor> device;
7583    for (size_t i = 0; i < size(); i++) {
7584        ALOGV("DeviceVector::getDeviceFromId(%d) itemAt(%zu)->mId %d", id, i, itemAt(i)->mId);
7585        if (itemAt(i)->mId == id) {
7586            device = itemAt(i);
7587            break;
7588        }
7589    }
7590    return device;
7591}
7592
7593AudioPolicyManager::DeviceVector AudioPolicyManager::DeviceVector::getDevicesFromType(
7594                                                                        audio_devices_t type) const
7595{
7596    DeviceVector devices;
7597    for (size_t i = 0; (i < size()) && (type != AUDIO_DEVICE_NONE); i++) {
7598        if (itemAt(i)->mDeviceType & type & ~AUDIO_DEVICE_BIT_IN) {
7599            devices.add(itemAt(i));
7600            type &= ~itemAt(i)->mDeviceType;
7601            ALOGV("DeviceVector::getDevicesFromType() for type %x found %p",
7602                  itemAt(i)->mDeviceType, itemAt(i).get());
7603        }
7604    }
7605    return devices;
7606}
7607
7608AudioPolicyManager::DeviceVector AudioPolicyManager::DeviceVector::getDevicesFromTypeAddr(
7609        audio_devices_t type, String8 address) const
7610{
7611    DeviceVector devices;
7612    for (size_t i = 0; i < size(); i++) {
7613        if (itemAt(i)->mDeviceType == type) {
7614            if (itemAt(i)->mAddress == address) {
7615                devices.add(itemAt(i));
7616            }
7617        }
7618    }
7619    return devices;
7620}
7621
7622sp<AudioPolicyManager::DeviceDescriptor> AudioPolicyManager::DeviceVector::getDeviceFromName(
7623        const String8& name) const
7624{
7625    sp<DeviceDescriptor> device;
7626    for (size_t i = 0; i < size(); i++) {
7627        if (itemAt(i)->mName == name) {
7628            device = itemAt(i);
7629            break;
7630        }
7631    }
7632    return device;
7633}
7634
7635void AudioPolicyManager::DeviceDescriptor::toAudioPortConfig(
7636                                                    struct audio_port_config *dstConfig,
7637                                                    const struct audio_port_config *srcConfig) const
7638{
7639    dstConfig->config_mask = AUDIO_PORT_CONFIG_CHANNEL_MASK|AUDIO_PORT_CONFIG_GAIN;
7640    if (srcConfig != NULL) {
7641        dstConfig->config_mask |= srcConfig->config_mask;
7642    }
7643
7644    AudioPortConfig::toAudioPortConfig(dstConfig, srcConfig);
7645
7646    dstConfig->id = mId;
7647    dstConfig->role = audio_is_output_device(mDeviceType) ?
7648                        AUDIO_PORT_ROLE_SINK : AUDIO_PORT_ROLE_SOURCE;
7649    dstConfig->type = AUDIO_PORT_TYPE_DEVICE;
7650    dstConfig->ext.device.type = mDeviceType;
7651    dstConfig->ext.device.hw_module = mModule->mHandle;
7652    strncpy(dstConfig->ext.device.address, mAddress.string(), AUDIO_DEVICE_MAX_ADDRESS_LEN);
7653}
7654
7655void AudioPolicyManager::DeviceDescriptor::toAudioPort(struct audio_port *port) const
7656{
7657    ALOGV("DeviceDescriptor::toAudioPort() handle %d type %x", mId, mDeviceType);
7658    AudioPort::toAudioPort(port);
7659    port->id = mId;
7660    toAudioPortConfig(&port->active_config);
7661    port->ext.device.type = mDeviceType;
7662    port->ext.device.hw_module = mModule->mHandle;
7663    strncpy(port->ext.device.address, mAddress.string(), AUDIO_DEVICE_MAX_ADDRESS_LEN);
7664}
7665
7666status_t AudioPolicyManager::DeviceDescriptor::dump(int fd, int spaces, int index) const
7667{
7668    const size_t SIZE = 256;
7669    char buffer[SIZE];
7670    String8 result;
7671
7672    snprintf(buffer, SIZE, "%*sDevice %d:\n", spaces, "", index+1);
7673    result.append(buffer);
7674    if (mId != 0) {
7675        snprintf(buffer, SIZE, "%*s- id: %2d\n", spaces, "", mId);
7676        result.append(buffer);
7677    }
7678    snprintf(buffer, SIZE, "%*s- type: %-48s\n", spaces, "",
7679                                              enumToString(sDeviceNameToEnumTable,
7680                                                           ARRAY_SIZE(sDeviceNameToEnumTable),
7681                                                           mDeviceType));
7682    result.append(buffer);
7683    if (mAddress.size() != 0) {
7684        snprintf(buffer, SIZE, "%*s- address: %-32s\n", spaces, "", mAddress.string());
7685        result.append(buffer);
7686    }
7687    write(fd, result.string(), result.size());
7688    AudioPort::dump(fd, spaces);
7689
7690    return NO_ERROR;
7691}
7692
7693status_t AudioPolicyManager::AudioPatch::dump(int fd, int spaces, int index) const
7694{
7695    const size_t SIZE = 256;
7696    char buffer[SIZE];
7697    String8 result;
7698
7699
7700    snprintf(buffer, SIZE, "%*sAudio patch %d:\n", spaces, "", index+1);
7701    result.append(buffer);
7702    snprintf(buffer, SIZE, "%*s- handle: %2d\n", spaces, "", mHandle);
7703    result.append(buffer);
7704    snprintf(buffer, SIZE, "%*s- audio flinger handle: %2d\n", spaces, "", mAfPatchHandle);
7705    result.append(buffer);
7706    snprintf(buffer, SIZE, "%*s- owner uid: %2d\n", spaces, "", mUid);
7707    result.append(buffer);
7708    snprintf(buffer, SIZE, "%*s- %d sources:\n", spaces, "", mPatch.num_sources);
7709    result.append(buffer);
7710    for (size_t i = 0; i < mPatch.num_sources; i++) {
7711        if (mPatch.sources[i].type == AUDIO_PORT_TYPE_DEVICE) {
7712            snprintf(buffer, SIZE, "%*s- Device ID %d %s\n", spaces + 2, "",
7713                     mPatch.sources[i].id, enumToString(sDeviceNameToEnumTable,
7714                                                        ARRAY_SIZE(sDeviceNameToEnumTable),
7715                                                        mPatch.sources[i].ext.device.type));
7716        } else {
7717            snprintf(buffer, SIZE, "%*s- Mix ID %d I/O handle %d\n", spaces + 2, "",
7718                     mPatch.sources[i].id, mPatch.sources[i].ext.mix.handle);
7719        }
7720        result.append(buffer);
7721    }
7722    snprintf(buffer, SIZE, "%*s- %d sinks:\n", spaces, "", mPatch.num_sinks);
7723    result.append(buffer);
7724    for (size_t i = 0; i < mPatch.num_sinks; i++) {
7725        if (mPatch.sinks[i].type == AUDIO_PORT_TYPE_DEVICE) {
7726            snprintf(buffer, SIZE, "%*s- Device ID %d %s\n", spaces + 2, "",
7727                     mPatch.sinks[i].id, enumToString(sDeviceNameToEnumTable,
7728                                                        ARRAY_SIZE(sDeviceNameToEnumTable),
7729                                                        mPatch.sinks[i].ext.device.type));
7730        } else {
7731            snprintf(buffer, SIZE, "%*s- Mix ID %d I/O handle %d\n", spaces + 2, "",
7732                     mPatch.sinks[i].id, mPatch.sinks[i].ext.mix.handle);
7733        }
7734        result.append(buffer);
7735    }
7736
7737    write(fd, result.string(), result.size());
7738    return NO_ERROR;
7739}
7740
7741// --- audio_policy.conf file parsing
7742
7743uint32_t AudioPolicyManager::parseOutputFlagNames(char *name)
7744{
7745    uint32_t flag = 0;
7746
7747    // it is OK to cast name to non const here as we are not going to use it after
7748    // strtok() modifies it
7749    char *flagName = strtok(name, "|");
7750    while (flagName != NULL) {
7751        if (strlen(flagName) != 0) {
7752            flag |= stringToEnum(sOutputFlagNameToEnumTable,
7753                               ARRAY_SIZE(sOutputFlagNameToEnumTable),
7754                               flagName);
7755        }
7756        flagName = strtok(NULL, "|");
7757    }
7758    //force direct flag if offload flag is set: offloading implies a direct output stream
7759    // and all common behaviors are driven by checking only the direct flag
7760    // this should normally be set appropriately in the policy configuration file
7761    if ((flag & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0) {
7762        flag |= AUDIO_OUTPUT_FLAG_DIRECT;
7763    }
7764
7765    return flag;
7766}
7767
7768uint32_t AudioPolicyManager::parseInputFlagNames(char *name)
7769{
7770    uint32_t flag = 0;
7771
7772    // it is OK to cast name to non const here as we are not going to use it after
7773    // strtok() modifies it
7774    char *flagName = strtok(name, "|");
7775    while (flagName != NULL) {
7776        if (strlen(flagName) != 0) {
7777            flag |= stringToEnum(sInputFlagNameToEnumTable,
7778                               ARRAY_SIZE(sInputFlagNameToEnumTable),
7779                               flagName);
7780        }
7781        flagName = strtok(NULL, "|");
7782    }
7783    return flag;
7784}
7785
7786audio_devices_t AudioPolicyManager::parseDeviceNames(char *name)
7787{
7788    uint32_t device = 0;
7789
7790    char *devName = strtok(name, "|");
7791    while (devName != NULL) {
7792        if (strlen(devName) != 0) {
7793            device |= stringToEnum(sDeviceNameToEnumTable,
7794                                 ARRAY_SIZE(sDeviceNameToEnumTable),
7795                                 devName);
7796         }
7797        devName = strtok(NULL, "|");
7798     }
7799    return device;
7800}
7801
7802void AudioPolicyManager::loadHwModule(cnode *root)
7803{
7804    status_t status = NAME_NOT_FOUND;
7805    cnode *node;
7806    sp<HwModule> module = new HwModule(root->name);
7807
7808    node = config_find(root, DEVICES_TAG);
7809    if (node != NULL) {
7810        node = node->first_child;
7811        while (node) {
7812            ALOGV("loadHwModule() loading device %s", node->name);
7813            status_t tmpStatus = module->loadDevice(node);
7814            if (status == NAME_NOT_FOUND || status == NO_ERROR) {
7815                status = tmpStatus;
7816            }
7817            node = node->next;
7818        }
7819    }
7820    node = config_find(root, OUTPUTS_TAG);
7821    if (node != NULL) {
7822        node = node->first_child;
7823        while (node) {
7824            ALOGV("loadHwModule() loading output %s", node->name);
7825            status_t tmpStatus = module->loadOutput(node);
7826            if (status == NAME_NOT_FOUND || status == NO_ERROR) {
7827                status = tmpStatus;
7828            }
7829            node = node->next;
7830        }
7831    }
7832    node = config_find(root, INPUTS_TAG);
7833    if (node != NULL) {
7834        node = node->first_child;
7835        while (node) {
7836            ALOGV("loadHwModule() loading input %s", node->name);
7837            status_t tmpStatus = module->loadInput(node);
7838            if (status == NAME_NOT_FOUND || status == NO_ERROR) {
7839                status = tmpStatus;
7840            }
7841            node = node->next;
7842        }
7843    }
7844    loadGlobalConfig(root, module);
7845
7846    if (status == NO_ERROR) {
7847        mHwModules.add(module);
7848    }
7849}
7850
7851void AudioPolicyManager::loadHwModules(cnode *root)
7852{
7853    cnode *node = config_find(root, AUDIO_HW_MODULE_TAG);
7854    if (node == NULL) {
7855        return;
7856    }
7857
7858    node = node->first_child;
7859    while (node) {
7860        ALOGV("loadHwModules() loading module %s", node->name);
7861        loadHwModule(node);
7862        node = node->next;
7863    }
7864}
7865
7866void AudioPolicyManager::loadGlobalConfig(cnode *root, const sp<HwModule>& module)
7867{
7868    cnode *node = config_find(root, GLOBAL_CONFIG_TAG);
7869
7870    if (node == NULL) {
7871        return;
7872    }
7873    DeviceVector declaredDevices;
7874    if (module != NULL) {
7875        declaredDevices = module->mDeclaredDevices;
7876    }
7877
7878    node = node->first_child;
7879    while (node) {
7880        if (strcmp(ATTACHED_OUTPUT_DEVICES_TAG, node->name) == 0) {
7881            mAvailableOutputDevices.loadDevicesFromName((char *)node->value,
7882                                                        declaredDevices);
7883            ALOGV("loadGlobalConfig() Attached Output Devices %08x",
7884                  mAvailableOutputDevices.types());
7885        } else if (strcmp(DEFAULT_OUTPUT_DEVICE_TAG, node->name) == 0) {
7886            audio_devices_t device = (audio_devices_t)stringToEnum(sDeviceNameToEnumTable,
7887                                              ARRAY_SIZE(sDeviceNameToEnumTable),
7888                                              (char *)node->value);
7889            if (device != AUDIO_DEVICE_NONE) {
7890                mDefaultOutputDevice = new DeviceDescriptor(String8(""), device);
7891            } else {
7892                ALOGW("loadGlobalConfig() default device not specified");
7893            }
7894            ALOGV("loadGlobalConfig() mDefaultOutputDevice %08x", mDefaultOutputDevice->mDeviceType);
7895        } else if (strcmp(ATTACHED_INPUT_DEVICES_TAG, node->name) == 0) {
7896            mAvailableInputDevices.loadDevicesFromName((char *)node->value,
7897                                                       declaredDevices);
7898            ALOGV("loadGlobalConfig() Available InputDevices %08x", mAvailableInputDevices.types());
7899        } else if (strcmp(SPEAKER_DRC_ENABLED_TAG, node->name) == 0) {
7900            mSpeakerDrcEnabled = stringToBool((char *)node->value);
7901            ALOGV("loadGlobalConfig() mSpeakerDrcEnabled = %d", mSpeakerDrcEnabled);
7902        } else if (strcmp(AUDIO_HAL_VERSION_TAG, node->name) == 0) {
7903            uint32_t major, minor;
7904            sscanf((char *)node->value, "%u.%u", &major, &minor);
7905            module->mHalVersion = HARDWARE_DEVICE_API_VERSION(major, minor);
7906            ALOGV("loadGlobalConfig() mHalVersion = %04x major %u minor %u",
7907                  module->mHalVersion, major, minor);
7908        }
7909        node = node->next;
7910    }
7911}
7912
7913status_t AudioPolicyManager::loadAudioPolicyConfig(const char *path)
7914{
7915    cnode *root;
7916    char *data;
7917
7918    data = (char *)load_file(path, NULL);
7919    if (data == NULL) {
7920        return -ENODEV;
7921    }
7922    root = config_node("", "");
7923    config_load(root, data);
7924
7925    loadHwModules(root);
7926    // legacy audio_policy.conf files have one global_configuration section
7927    loadGlobalConfig(root, getModuleFromName(AUDIO_HARDWARE_MODULE_ID_PRIMARY));
7928    config_free(root);
7929    free(root);
7930    free(data);
7931
7932    ALOGI("loadAudioPolicyConfig() loaded %s\n", path);
7933
7934    return NO_ERROR;
7935}
7936
7937void AudioPolicyManager::defaultAudioPolicyConfig(void)
7938{
7939    sp<HwModule> module;
7940    sp<IOProfile> profile;
7941    sp<DeviceDescriptor> defaultInputDevice = new DeviceDescriptor(String8(""),
7942                                                                   AUDIO_DEVICE_IN_BUILTIN_MIC);
7943    mAvailableOutputDevices.add(mDefaultOutputDevice);
7944    mAvailableInputDevices.add(defaultInputDevice);
7945
7946    module = new HwModule("primary");
7947
7948    profile = new IOProfile(String8("primary"), AUDIO_PORT_ROLE_SOURCE, module);
7949    profile->mSamplingRates.add(44100);
7950    profile->mFormats.add(AUDIO_FORMAT_PCM_16_BIT);
7951    profile->mChannelMasks.add(AUDIO_CHANNEL_OUT_STEREO);
7952    profile->mSupportedDevices.add(mDefaultOutputDevice);
7953    profile->mFlags = AUDIO_OUTPUT_FLAG_PRIMARY;
7954    module->mOutputProfiles.add(profile);
7955
7956    profile = new IOProfile(String8("primary"), AUDIO_PORT_ROLE_SINK, module);
7957    profile->mSamplingRates.add(8000);
7958    profile->mFormats.add(AUDIO_FORMAT_PCM_16_BIT);
7959    profile->mChannelMasks.add(AUDIO_CHANNEL_IN_MONO);
7960    profile->mSupportedDevices.add(defaultInputDevice);
7961    module->mInputProfiles.add(profile);
7962
7963    mHwModules.add(module);
7964}
7965
7966audio_stream_type_t AudioPolicyManager::streamTypefromAttributesInt(const audio_attributes_t *attr)
7967{
7968    // flags to stream type mapping
7969    if ((attr->flags & AUDIO_FLAG_AUDIBILITY_ENFORCED) == AUDIO_FLAG_AUDIBILITY_ENFORCED) {
7970        return AUDIO_STREAM_ENFORCED_AUDIBLE;
7971    }
7972    if ((attr->flags & AUDIO_FLAG_SCO) == AUDIO_FLAG_SCO) {
7973        return AUDIO_STREAM_BLUETOOTH_SCO;
7974    }
7975
7976    // usage to stream type mapping
7977    switch (attr->usage) {
7978    case AUDIO_USAGE_MEDIA:
7979    case AUDIO_USAGE_GAME:
7980    case AUDIO_USAGE_ASSISTANCE_NAVIGATION_GUIDANCE:
7981        return AUDIO_STREAM_MUSIC;
7982    case AUDIO_USAGE_ASSISTANCE_ACCESSIBILITY:
7983        if (isStreamActive(AUDIO_STREAM_ALARM)) {
7984            return AUDIO_STREAM_ALARM;
7985        }
7986        if (isStreamActive(AUDIO_STREAM_RING)) {
7987            return AUDIO_STREAM_RING;
7988        }
7989        if (isInCall()) {
7990            return AUDIO_STREAM_VOICE_CALL;
7991        }
7992        return AUDIO_STREAM_ACCESSIBILITY;
7993    case AUDIO_USAGE_ASSISTANCE_SONIFICATION:
7994        return AUDIO_STREAM_SYSTEM;
7995    case AUDIO_USAGE_VOICE_COMMUNICATION:
7996        return AUDIO_STREAM_VOICE_CALL;
7997
7998    case AUDIO_USAGE_VOICE_COMMUNICATION_SIGNALLING:
7999        return AUDIO_STREAM_DTMF;
8000
8001    case AUDIO_USAGE_ALARM:
8002        return AUDIO_STREAM_ALARM;
8003    case AUDIO_USAGE_NOTIFICATION_TELEPHONY_RINGTONE:
8004        return AUDIO_STREAM_RING;
8005
8006    case AUDIO_USAGE_NOTIFICATION:
8007    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_REQUEST:
8008    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_INSTANT:
8009    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_DELAYED:
8010    case AUDIO_USAGE_NOTIFICATION_EVENT:
8011        return AUDIO_STREAM_NOTIFICATION;
8012
8013    case AUDIO_USAGE_UNKNOWN:
8014    default:
8015        return AUDIO_STREAM_MUSIC;
8016    }
8017}
8018
8019bool AudioPolicyManager::isValidAttributes(const audio_attributes_t *paa) {
8020    // has flags that map to a strategy?
8021    if ((paa->flags & (AUDIO_FLAG_AUDIBILITY_ENFORCED | AUDIO_FLAG_SCO | AUDIO_FLAG_BEACON)) != 0) {
8022        return true;
8023    }
8024
8025    // has known usage?
8026    switch (paa->usage) {
8027    case AUDIO_USAGE_UNKNOWN:
8028    case AUDIO_USAGE_MEDIA:
8029    case AUDIO_USAGE_VOICE_COMMUNICATION:
8030    case AUDIO_USAGE_VOICE_COMMUNICATION_SIGNALLING:
8031    case AUDIO_USAGE_ALARM:
8032    case AUDIO_USAGE_NOTIFICATION:
8033    case AUDIO_USAGE_NOTIFICATION_TELEPHONY_RINGTONE:
8034    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_REQUEST:
8035    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_INSTANT:
8036    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_DELAYED:
8037    case AUDIO_USAGE_NOTIFICATION_EVENT:
8038    case AUDIO_USAGE_ASSISTANCE_ACCESSIBILITY:
8039    case AUDIO_USAGE_ASSISTANCE_NAVIGATION_GUIDANCE:
8040    case AUDIO_USAGE_ASSISTANCE_SONIFICATION:
8041    case AUDIO_USAGE_GAME:
8042    case AUDIO_USAGE_VIRTUAL_SOURCE:
8043        break;
8044    default:
8045        return false;
8046    }
8047    return true;
8048}
8049
8050}; // namespace android
8051