AudioPolicyManager.cpp revision 5ac8cd425e1a0c4287c0bb84f922fef4fa106411 
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 "APM_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#define AUDIO_POLICY_XML_CONFIG_FILE "/system/etc/audio_policy_configuration.xml"
28
29#include <inttypes.h>
30#include <math.h>
31
32#include <AudioPolicyManagerInterface.h>
33#include <AudioPolicyEngineInstance.h>
34#include <cutils/properties.h>
35#include <utils/Log.h>
36#include <hardware/audio.h>
37#include <hardware/audio_effect.h>
38#include <media/AudioParameter.h>
39#include <media/AudioPolicyHelper.h>
40#include <soundtrigger/SoundTrigger.h>
41#include "AudioPolicyManager.h"
42#ifndef USE_XML_AUDIO_POLICY_CONF
43#include <ConfigParsingUtils.h>
44#include <StreamDescriptor.h>
45#endif
46#include <Serializer.h>
47#include "TypeConverter.h"
48#include <policy.h>
49
50namespace android {
51
52// ----------------------------------------------------------------------------
53// AudioPolicyInterface implementation
54// ----------------------------------------------------------------------------
55
56status_t AudioPolicyManager::setDeviceConnectionState(audio_devices_t device,
57                                                      audio_policy_dev_state_t state,
58                                                      const char *device_address,
59                                                      const char *device_name)
60{
61    return setDeviceConnectionStateInt(device, state, device_address, device_name);
62}
63
64status_t AudioPolicyManager::setDeviceConnectionStateInt(audio_devices_t device,
65                                                         audio_policy_dev_state_t state,
66                                                         const char *device_address,
67                                                         const char *device_name)
68{
69    ALOGV("setDeviceConnectionStateInt() device: 0x%X, state %d, address %s name %s",
70-            device, state, device_address, device_name);
71
72    // connect/disconnect only 1 device at a time
73    if (!audio_is_output_device(device) && !audio_is_input_device(device)) return BAD_VALUE;
74
75    sp<DeviceDescriptor> devDesc =
76            mHwModules.getDeviceDescriptor(device, device_address, device_name);
77
78    // handle output devices
79    if (audio_is_output_device(device)) {
80        SortedVector <audio_io_handle_t> outputs;
81
82        ssize_t index = mAvailableOutputDevices.indexOf(devDesc);
83
84        // save a copy of the opened output descriptors before any output is opened or closed
85        // by checkOutputsForDevice(). This will be needed by checkOutputForAllStrategies()
86        mPreviousOutputs = mOutputs;
87        switch (state)
88        {
89        // handle output device connection
90        case AUDIO_POLICY_DEVICE_STATE_AVAILABLE: {
91            if (index >= 0) {
92                ALOGW("setDeviceConnectionState() device already connected: %x", device);
93                return INVALID_OPERATION;
94            }
95            ALOGV("setDeviceConnectionState() connecting device %x", device);
96
97            // register new device as available
98            index = mAvailableOutputDevices.add(devDesc);
99            if (index >= 0) {
100                sp<HwModule> module = mHwModules.getModuleForDevice(device);
101                if (module == 0) {
102                    ALOGD("setDeviceConnectionState() could not find HW module for device %08x",
103                          device);
104                    mAvailableOutputDevices.remove(devDesc);
105                    return INVALID_OPERATION;
106                }
107                mAvailableOutputDevices[index]->attach(module);
108            } else {
109                return NO_MEMORY;
110            }
111
112            if (checkOutputsForDevice(devDesc, state, outputs, devDesc->mAddress) != NO_ERROR) {
113                mAvailableOutputDevices.remove(devDesc);
114                return INVALID_OPERATION;
115            }
116            // Propagate device availability to Engine
117            mEngine->setDeviceConnectionState(devDesc, state);
118
119            // outputs should never be empty here
120            ALOG_ASSERT(outputs.size() != 0, "setDeviceConnectionState():"
121                    "checkOutputsForDevice() returned no outputs but status OK");
122            ALOGV("setDeviceConnectionState() checkOutputsForDevice() returned %zu outputs",
123                  outputs.size());
124
125            // Send connect to HALs
126            AudioParameter param = AudioParameter(devDesc->mAddress);
127            param.addInt(String8(AUDIO_PARAMETER_DEVICE_CONNECT), device);
128            mpClientInterface->setParameters(AUDIO_IO_HANDLE_NONE, param.toString());
129
130            } break;
131        // handle output device disconnection
132        case AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE: {
133            if (index < 0) {
134                ALOGW("setDeviceConnectionState() device not connected: %x", device);
135                return INVALID_OPERATION;
136            }
137
138            ALOGV("setDeviceConnectionState() disconnecting output device %x", device);
139
140            // Send Disconnect to HALs
141            AudioParameter param = AudioParameter(devDesc->mAddress);
142            param.addInt(String8(AUDIO_PARAMETER_DEVICE_DISCONNECT), device);
143            mpClientInterface->setParameters(AUDIO_IO_HANDLE_NONE, param.toString());
144
145            // remove device from available output devices
146            mAvailableOutputDevices.remove(devDesc);
147
148            checkOutputsForDevice(devDesc, state, outputs, devDesc->mAddress);
149
150            // Propagate device availability to Engine
151            mEngine->setDeviceConnectionState(devDesc, state);
152            } break;
153
154        default:
155            ALOGE("setDeviceConnectionState() invalid state: %x", state);
156            return BAD_VALUE;
157        }
158
159        // checkA2dpSuspend must run before checkOutputForAllStrategies so that A2DP
160        // output is suspended before any tracks are moved to it
161        checkA2dpSuspend();
162        checkOutputForAllStrategies();
163        // outputs must be closed after checkOutputForAllStrategies() is executed
164        if (!outputs.isEmpty()) {
165            for (size_t i = 0; i < outputs.size(); i++) {
166                sp<SwAudioOutputDescriptor> desc = mOutputs.valueFor(outputs[i]);
167                // close unused outputs after device disconnection or direct outputs that have been
168                // opened by checkOutputsForDevice() to query dynamic parameters
169                if ((state == AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE) ||
170                        (((desc->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) != 0) &&
171                         (desc->mDirectOpenCount == 0))) {
172                    closeOutput(outputs[i]);
173                }
174            }
175            // check again after closing A2DP output to reset mA2dpSuspended if needed
176            checkA2dpSuspend();
177        }
178
179        updateDevicesAndOutputs();
180        if (mEngine->getPhoneState() == AUDIO_MODE_IN_CALL && hasPrimaryOutput()) {
181            audio_devices_t newDevice = getNewOutputDevice(mPrimaryOutput, false /*fromCache*/);
182            updateCallRouting(newDevice);
183        }
184        for (size_t i = 0; i < mOutputs.size(); i++) {
185            sp<SwAudioOutputDescriptor> desc = mOutputs.valueAt(i);
186            if ((mEngine->getPhoneState() != AUDIO_MODE_IN_CALL) || (desc != mPrimaryOutput)) {
187                audio_devices_t newDevice = getNewOutputDevice(desc, true /*fromCache*/);
188                // do not force device change on duplicated output because if device is 0, it will
189                // also force a device 0 for the two outputs it is duplicated to which may override
190                // a valid device selection on those outputs.
191                bool force = !desc->isDuplicated()
192                        && (!device_distinguishes_on_address(device)
193                                // always force when disconnecting (a non-duplicated device)
194                                || (state == AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE));
195                setOutputDevice(desc, newDevice, force, 0);
196            }
197        }
198
199        if (state == AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE) {
200            cleanUpForDevice(devDesc);
201        }
202
203        mpClientInterface->onAudioPortListUpdate();
204        return NO_ERROR;
205    }  // end if is output device
206
207    // handle input devices
208    if (audio_is_input_device(device)) {
209        SortedVector <audio_io_handle_t> inputs;
210
211        ssize_t index = mAvailableInputDevices.indexOf(devDesc);
212        switch (state)
213        {
214        // handle input device connection
215        case AUDIO_POLICY_DEVICE_STATE_AVAILABLE: {
216            if (index >= 0) {
217                ALOGW("setDeviceConnectionState() device already connected: %d", device);
218                return INVALID_OPERATION;
219            }
220            sp<HwModule> module = mHwModules.getModuleForDevice(device);
221            if (module == NULL) {
222                ALOGW("setDeviceConnectionState(): could not find HW module for device %08x",
223                      device);
224                return INVALID_OPERATION;
225            }
226            if (checkInputsForDevice(devDesc, state, inputs, devDesc->mAddress) != NO_ERROR) {
227                return INVALID_OPERATION;
228            }
229
230            index = mAvailableInputDevices.add(devDesc);
231            if (index >= 0) {
232                mAvailableInputDevices[index]->attach(module);
233            } else {
234                return NO_MEMORY;
235            }
236
237            // Set connect to HALs
238            AudioParameter param = AudioParameter(devDesc->mAddress);
239            param.addInt(String8(AUDIO_PARAMETER_DEVICE_CONNECT), device);
240            mpClientInterface->setParameters(AUDIO_IO_HANDLE_NONE, param.toString());
241
242            // Propagate device availability to Engine
243            mEngine->setDeviceConnectionState(devDesc, state);
244        } break;
245
246        // handle input device disconnection
247        case AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE: {
248            if (index < 0) {
249                ALOGW("setDeviceConnectionState() device not connected: %d", device);
250                return INVALID_OPERATION;
251            }
252
253            ALOGV("setDeviceConnectionState() disconnecting input device %x", device);
254
255            // Set Disconnect to HALs
256            AudioParameter param = AudioParameter(devDesc->mAddress);
257            param.addInt(String8(AUDIO_PARAMETER_DEVICE_DISCONNECT), device);
258            mpClientInterface->setParameters(AUDIO_IO_HANDLE_NONE, param.toString());
259
260            checkInputsForDevice(devDesc, state, inputs, devDesc->mAddress);
261            mAvailableInputDevices.remove(devDesc);
262
263            // Propagate device availability to Engine
264            mEngine->setDeviceConnectionState(devDesc, state);
265        } break;
266
267        default:
268            ALOGE("setDeviceConnectionState() invalid state: %x", state);
269            return BAD_VALUE;
270        }
271
272        closeAllInputs();
273
274        if (mEngine->getPhoneState() == AUDIO_MODE_IN_CALL && hasPrimaryOutput()) {
275            audio_devices_t newDevice = getNewOutputDevice(mPrimaryOutput, false /*fromCache*/);
276            updateCallRouting(newDevice);
277        }
278
279        if (state == AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE) {
280            cleanUpForDevice(devDesc);
281        }
282
283        mpClientInterface->onAudioPortListUpdate();
284        return NO_ERROR;
285    } // end if is input device
286
287    ALOGW("setDeviceConnectionState() invalid device: %x", device);
288    return BAD_VALUE;
289}
290
291audio_policy_dev_state_t AudioPolicyManager::getDeviceConnectionState(audio_devices_t device,
292                                                                      const char *device_address)
293{
294    sp<DeviceDescriptor> devDesc = mHwModules.getDeviceDescriptor(device, device_address, "");
295
296    DeviceVector *deviceVector;
297
298    if (audio_is_output_device(device)) {
299        deviceVector = &mAvailableOutputDevices;
300    } else if (audio_is_input_device(device)) {
301        deviceVector = &mAvailableInputDevices;
302    } else {
303        ALOGW("getDeviceConnectionState() invalid device type %08x", device);
304        return AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE;
305    }
306    return deviceVector->getDeviceConnectionState(devDesc);
307}
308
309void AudioPolicyManager::updateCallRouting(audio_devices_t rxDevice, int delayMs)
310{
311    bool createTxPatch = false;
312    struct audio_patch patch;
313    patch.num_sources = 1;
314    patch.num_sinks = 1;
315    status_t status;
316    audio_patch_handle_t afPatchHandle;
317    DeviceVector deviceList;
318
319    if(!hasPrimaryOutput()) {
320        return;
321    }
322    audio_devices_t txDevice = getDeviceAndMixForInputSource(AUDIO_SOURCE_VOICE_COMMUNICATION);
323    ALOGV("updateCallRouting device rxDevice %08x txDevice %08x", rxDevice, txDevice);
324
325    // release existing RX patch if any
326    if (mCallRxPatch != 0) {
327        mpClientInterface->releaseAudioPatch(mCallRxPatch->mAfPatchHandle, 0);
328        mCallRxPatch.clear();
329    }
330    // release TX patch if any
331    if (mCallTxPatch != 0) {
332        mpClientInterface->releaseAudioPatch(mCallTxPatch->mAfPatchHandle, 0);
333        mCallTxPatch.clear();
334    }
335
336    // If the RX device is on the primary HW module, then use legacy routing method for voice calls
337    // via setOutputDevice() on primary output.
338    // Otherwise, create two audio patches for TX and RX path.
339    if (availablePrimaryOutputDevices() & rxDevice) {
340        setOutputDevice(mPrimaryOutput, rxDevice, true, delayMs);
341        // If the TX device is also on the primary HW module, setOutputDevice() will take care
342        // of it due to legacy implementation. If not, create a patch.
343        if ((availablePrimaryInputDevices() & txDevice & ~AUDIO_DEVICE_BIT_IN)
344                == AUDIO_DEVICE_NONE) {
345            createTxPatch = true;
346        }
347    } else {
348        // create RX path audio patch
349        deviceList = mAvailableOutputDevices.getDevicesFromType(rxDevice);
350        ALOG_ASSERT(!deviceList.isEmpty(),
351                    "updateCallRouting() selected device not in output device list");
352        sp<DeviceDescriptor> rxSinkDeviceDesc = deviceList.itemAt(0);
353        deviceList = mAvailableInputDevices.getDevicesFromType(AUDIO_DEVICE_IN_TELEPHONY_RX);
354        ALOG_ASSERT(!deviceList.isEmpty(),
355                    "updateCallRouting() no telephony RX device");
356        sp<DeviceDescriptor> rxSourceDeviceDesc = deviceList.itemAt(0);
357
358        rxSourceDeviceDesc->toAudioPortConfig(&patch.sources[0]);
359        rxSinkDeviceDesc->toAudioPortConfig(&patch.sinks[0]);
360
361        // request to reuse existing output stream if one is already opened to reach the RX device
362        SortedVector<audio_io_handle_t> outputs =
363                                getOutputsForDevice(rxDevice, mOutputs);
364        audio_io_handle_t output = selectOutput(outputs,
365                                                AUDIO_OUTPUT_FLAG_NONE,
366                                                AUDIO_FORMAT_INVALID);
367        if (output != AUDIO_IO_HANDLE_NONE) {
368            sp<SwAudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
369            ALOG_ASSERT(!outputDesc->isDuplicated(),
370                        "updateCallRouting() RX device output is duplicated");
371            outputDesc->toAudioPortConfig(&patch.sources[1]);
372            patch.sources[1].ext.mix.usecase.stream = AUDIO_STREAM_PATCH;
373            patch.num_sources = 2;
374        }
375
376        afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
377        status = mpClientInterface->createAudioPatch(&patch, &afPatchHandle, 0);
378        ALOGW_IF(status != NO_ERROR, "updateCallRouting() error %d creating RX audio patch",
379                                               status);
380        if (status == NO_ERROR) {
381            mCallRxPatch = new AudioPatch(&patch, mUidCached);
382            mCallRxPatch->mAfPatchHandle = afPatchHandle;
383            mCallRxPatch->mUid = mUidCached;
384        }
385        createTxPatch = true;
386    }
387    if (createTxPatch) {
388
389        struct audio_patch patch;
390        patch.num_sources = 1;
391        patch.num_sinks = 1;
392        deviceList = mAvailableInputDevices.getDevicesFromType(txDevice);
393        ALOG_ASSERT(!deviceList.isEmpty(),
394                    "updateCallRouting() selected device not in input device list");
395        sp<DeviceDescriptor> txSourceDeviceDesc = deviceList.itemAt(0);
396        txSourceDeviceDesc->toAudioPortConfig(&patch.sources[0]);
397        deviceList = mAvailableOutputDevices.getDevicesFromType(AUDIO_DEVICE_OUT_TELEPHONY_TX);
398        ALOG_ASSERT(!deviceList.isEmpty(),
399                    "updateCallRouting() no telephony TX device");
400        sp<DeviceDescriptor> txSinkDeviceDesc = deviceList.itemAt(0);
401        txSinkDeviceDesc->toAudioPortConfig(&patch.sinks[0]);
402
403        SortedVector<audio_io_handle_t> outputs =
404                                getOutputsForDevice(AUDIO_DEVICE_OUT_TELEPHONY_TX, mOutputs);
405        audio_io_handle_t output = selectOutput(outputs,
406                                                AUDIO_OUTPUT_FLAG_NONE,
407                                                AUDIO_FORMAT_INVALID);
408        // request to reuse existing output stream if one is already opened to reach the TX
409        // path output device
410        if (output != AUDIO_IO_HANDLE_NONE) {
411            sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
412            ALOG_ASSERT(!outputDesc->isDuplicated(),
413                        "updateCallRouting() RX device output is duplicated");
414            outputDesc->toAudioPortConfig(&patch.sources[1]);
415            patch.sources[1].ext.mix.usecase.stream = AUDIO_STREAM_PATCH;
416            patch.num_sources = 2;
417        }
418
419        // terminate active capture if on the same HW module as the call TX source device
420        // FIXME: would be better to refine to only inputs whose profile connects to the
421        // call TX device but this information is not in the audio patch and logic here must be
422        // symmetric to the one in startInput()
423        audio_io_handle_t activeInput = mInputs.getActiveInput();
424        if (activeInput != 0) {
425            sp<AudioInputDescriptor> activeDesc = mInputs.valueFor(activeInput);
426            if (activeDesc->getModuleHandle() == txSourceDeviceDesc->getModuleHandle()) {
427                //FIXME: consider all active sessions
428                AudioSessionCollection activeSessions = activeDesc->getActiveAudioSessions();
429                audio_session_t activeSession = activeSessions.keyAt(0);
430                stopInput(activeInput, activeSession);
431                releaseInput(activeInput, activeSession);
432            }
433        }
434
435        afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
436        status = mpClientInterface->createAudioPatch(&patch, &afPatchHandle, 0);
437        ALOGW_IF(status != NO_ERROR, "setPhoneState() error %d creating TX audio patch",
438                                               status);
439        if (status == NO_ERROR) {
440            mCallTxPatch = new AudioPatch(&patch, mUidCached);
441            mCallTxPatch->mAfPatchHandle = afPatchHandle;
442            mCallTxPatch->mUid = mUidCached;
443        }
444    }
445}
446
447void AudioPolicyManager::setPhoneState(audio_mode_t state)
448{
449    ALOGV("setPhoneState() state %d", state);
450    // store previous phone state for management of sonification strategy below
451    int oldState = mEngine->getPhoneState();
452
453    if (mEngine->setPhoneState(state) != NO_ERROR) {
454        ALOGW("setPhoneState() invalid or same state %d", state);
455        return;
456    }
457    /// Opens: can these line be executed after the switch of volume curves???
458    // if leaving call state, handle special case of active streams
459    // pertaining to sonification strategy see handleIncallSonification()
460    if (isStateInCall(oldState)) {
461        ALOGV("setPhoneState() in call state management: new state is %d", state);
462        for (int stream = 0; stream < AUDIO_STREAM_FOR_POLICY_CNT; stream++) {
463            handleIncallSonification((audio_stream_type_t)stream, false, true);
464        }
465
466        // force reevaluating accessibility routing when call stops
467        mpClientInterface->invalidateStream(AUDIO_STREAM_ACCESSIBILITY);
468    }
469
470    /**
471     * Switching to or from incall state or switching between telephony and VoIP lead to force
472     * routing command.
473     */
474    bool force = ((is_state_in_call(oldState) != is_state_in_call(state))
475                  || (is_state_in_call(state) && (state != oldState)));
476
477    // check for device and output changes triggered by new phone state
478    checkA2dpSuspend();
479    checkOutputForAllStrategies();
480    updateDevicesAndOutputs();
481
482    int delayMs = 0;
483    if (isStateInCall(state)) {
484        nsecs_t sysTime = systemTime();
485        for (size_t i = 0; i < mOutputs.size(); i++) {
486            sp<SwAudioOutputDescriptor> desc = mOutputs.valueAt(i);
487            // mute media and sonification strategies and delay device switch by the largest
488            // latency of any output where either strategy is active.
489            // This avoid sending the ring tone or music tail into the earpiece or headset.
490            if ((isStrategyActive(desc, STRATEGY_MEDIA,
491                                  SONIFICATION_HEADSET_MUSIC_DELAY,
492                                  sysTime) ||
493                 isStrategyActive(desc, STRATEGY_SONIFICATION,
494                                  SONIFICATION_HEADSET_MUSIC_DELAY,
495                                  sysTime)) &&
496                    (delayMs < (int)desc->latency()*2)) {
497                delayMs = desc->latency()*2;
498            }
499            setStrategyMute(STRATEGY_MEDIA, true, desc);
500            setStrategyMute(STRATEGY_MEDIA, false, desc, MUTE_TIME_MS,
501                getDeviceForStrategy(STRATEGY_MEDIA, true /*fromCache*/));
502            setStrategyMute(STRATEGY_SONIFICATION, true, desc);
503            setStrategyMute(STRATEGY_SONIFICATION, false, desc, MUTE_TIME_MS,
504                getDeviceForStrategy(STRATEGY_SONIFICATION, true /*fromCache*/));
505        }
506    }
507
508    if (hasPrimaryOutput()) {
509        // Note that despite the fact that getNewOutputDevice() is called on the primary output,
510        // the device returned is not necessarily reachable via this output
511        audio_devices_t rxDevice = getNewOutputDevice(mPrimaryOutput, false /*fromCache*/);
512        // force routing command to audio hardware when ending call
513        // even if no device change is needed
514        if (isStateInCall(oldState) && rxDevice == AUDIO_DEVICE_NONE) {
515            rxDevice = mPrimaryOutput->device();
516        }
517
518        if (state == AUDIO_MODE_IN_CALL) {
519            updateCallRouting(rxDevice, delayMs);
520        } else if (oldState == AUDIO_MODE_IN_CALL) {
521            if (mCallRxPatch != 0) {
522                mpClientInterface->releaseAudioPatch(mCallRxPatch->mAfPatchHandle, 0);
523                mCallRxPatch.clear();
524            }
525            if (mCallTxPatch != 0) {
526                mpClientInterface->releaseAudioPatch(mCallTxPatch->mAfPatchHandle, 0);
527                mCallTxPatch.clear();
528            }
529            setOutputDevice(mPrimaryOutput, rxDevice, force, 0);
530        } else {
531            setOutputDevice(mPrimaryOutput, rxDevice, force, 0);
532        }
533    }
534    // if entering in call state, handle special case of active streams
535    // pertaining to sonification strategy see handleIncallSonification()
536    if (isStateInCall(state)) {
537        ALOGV("setPhoneState() in call state management: new state is %d", state);
538        for (int stream = 0; stream < AUDIO_STREAM_FOR_POLICY_CNT; stream++) {
539            handleIncallSonification((audio_stream_type_t)stream, true, true);
540        }
541
542        // force reevaluating accessibility routing when call starts
543        mpClientInterface->invalidateStream(AUDIO_STREAM_ACCESSIBILITY);
544    }
545
546    // Flag that ringtone volume must be limited to music volume until we exit MODE_RINGTONE
547    if (state == AUDIO_MODE_RINGTONE &&
548        isStreamActive(AUDIO_STREAM_MUSIC, SONIFICATION_HEADSET_MUSIC_DELAY)) {
549        mLimitRingtoneVolume = true;
550    } else {
551        mLimitRingtoneVolume = false;
552    }
553}
554
555audio_mode_t AudioPolicyManager::getPhoneState() {
556    return mEngine->getPhoneState();
557}
558
559void AudioPolicyManager::setForceUse(audio_policy_force_use_t usage,
560                                         audio_policy_forced_cfg_t config)
561{
562    ALOGV("setForceUse() usage %d, config %d, mPhoneState %d", usage, config, mEngine->getPhoneState());
563
564    if (mEngine->setForceUse(usage, config) != NO_ERROR) {
565        ALOGW("setForceUse() could not set force cfg %d for usage %d", config, usage);
566        return;
567    }
568    bool forceVolumeReeval = (usage == AUDIO_POLICY_FORCE_FOR_COMMUNICATION) ||
569            (usage == AUDIO_POLICY_FORCE_FOR_DOCK) ||
570            (usage == AUDIO_POLICY_FORCE_FOR_SYSTEM);
571
572    // check for device and output changes triggered by new force usage
573    checkA2dpSuspend();
574    checkOutputForAllStrategies();
575    updateDevicesAndOutputs();
576
577    if (mEngine->getPhoneState() == AUDIO_MODE_IN_CALL && hasPrimaryOutput()) {
578        audio_devices_t newDevice = getNewOutputDevice(mPrimaryOutput, true /*fromCache*/);
579        updateCallRouting(newDevice);
580    }
581    for (size_t i = 0; i < mOutputs.size(); i++) {
582        sp<SwAudioOutputDescriptor> outputDesc = mOutputs.valueAt(i);
583        audio_devices_t newDevice = getNewOutputDevice(outputDesc, true /*fromCache*/);
584        if ((mEngine->getPhoneState() != AUDIO_MODE_IN_CALL) || (outputDesc != mPrimaryOutput)) {
585            setOutputDevice(outputDesc, newDevice, (newDevice != AUDIO_DEVICE_NONE));
586        }
587        if (forceVolumeReeval && (newDevice != AUDIO_DEVICE_NONE)) {
588            applyStreamVolumes(outputDesc, newDevice, 0, true);
589        }
590    }
591
592    audio_io_handle_t activeInput = mInputs.getActiveInput();
593    if (activeInput != 0) {
594        sp<AudioInputDescriptor> activeDesc = mInputs.valueFor(activeInput);
595        audio_devices_t newDevice = getNewInputDevice(activeInput);
596        // Force new input selection if the new device can not be reached via current input
597        if (activeDesc->mProfile->getSupportedDevices().types() & (newDevice & ~AUDIO_DEVICE_BIT_IN)) {
598            setInputDevice(activeInput, newDevice);
599        } else {
600            closeInput(activeInput);
601        }
602    }
603}
604
605void AudioPolicyManager::setSystemProperty(const char* property, const char* value)
606{
607    ALOGV("setSystemProperty() property %s, value %s", property, value);
608}
609
610// Find a direct output profile compatible with the parameters passed, even if the input flags do
611// not explicitly request a direct output
612sp<IOProfile> AudioPolicyManager::getProfileForDirectOutput(
613                                                               audio_devices_t device,
614                                                               uint32_t samplingRate,
615                                                               audio_format_t format,
616                                                               audio_channel_mask_t channelMask,
617                                                               audio_output_flags_t flags)
618{
619    // only retain flags that will drive the direct output profile selection
620    // if explicitly requested
621    static const uint32_t kRelevantFlags =
622            (AUDIO_OUTPUT_FLAG_HW_AV_SYNC | AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD);
623    flags =
624        (audio_output_flags_t)((flags & kRelevantFlags) | AUDIO_OUTPUT_FLAG_DIRECT);
625
626    sp<IOProfile> profile;
627
628    for (size_t i = 0; i < mHwModules.size(); i++) {
629        if (mHwModules[i]->mHandle == 0) {
630            continue;
631        }
632        for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++) {
633            sp<IOProfile> curProfile = mHwModules[i]->mOutputProfiles[j];
634            if (!curProfile->isCompatibleProfile(device, String8(""),
635                    samplingRate, NULL /*updatedSamplingRate*/,
636                    format, NULL /*updatedFormat*/,
637                    channelMask, NULL /*updatedChannelMask*/,
638                    flags)) {
639                continue;
640            }
641            // reject profiles not corresponding to a device currently available
642            if ((mAvailableOutputDevices.types() & curProfile->getSupportedDevicesType()) == 0) {
643                continue;
644            }
645            // if several profiles are compatible, give priority to one with offload capability
646            if (profile != 0 && ((curProfile->getFlags() & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) == 0)) {
647                continue;
648            }
649            profile = curProfile;
650            if ((profile->getFlags() & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0) {
651                break;
652            }
653        }
654    }
655    return profile;
656}
657
658audio_io_handle_t AudioPolicyManager::getOutput(audio_stream_type_t stream,
659                                                uint32_t samplingRate,
660                                                audio_format_t format,
661                                                audio_channel_mask_t channelMask,
662                                                audio_output_flags_t flags,
663                                                const audio_offload_info_t *offloadInfo)
664{
665    routing_strategy strategy = getStrategy(stream);
666    audio_devices_t device = getDeviceForStrategy(strategy, false /*fromCache*/);
667    ALOGV("getOutput() device %d, stream %d, samplingRate %d, format %x, channelMask %x, flags %x",
668          device, stream, samplingRate, format, channelMask, flags);
669
670    return getOutputForDevice(device, AUDIO_SESSION_ALLOCATE,
671                              stream, samplingRate,format, channelMask,
672                              flags, offloadInfo);
673}
674
675status_t AudioPolicyManager::getOutputForAttr(const audio_attributes_t *attr,
676                                              audio_io_handle_t *output,
677                                              audio_session_t session,
678                                              audio_stream_type_t *stream,
679                                              uid_t uid,
680                                              uint32_t samplingRate,
681                                              audio_format_t format,
682                                              audio_channel_mask_t channelMask,
683                                              audio_output_flags_t flags,
684                                              audio_port_handle_t selectedDeviceId,
685                                              const audio_offload_info_t *offloadInfo)
686{
687    audio_attributes_t attributes;
688    if (attr != NULL) {
689        if (!isValidAttributes(attr)) {
690            ALOGE("getOutputForAttr() invalid attributes: usage=%d content=%d flags=0x%x tags=[%s]",
691                  attr->usage, attr->content_type, attr->flags,
692                  attr->tags);
693            return BAD_VALUE;
694        }
695        attributes = *attr;
696    } else {
697        if (*stream < AUDIO_STREAM_MIN || *stream >= AUDIO_STREAM_PUBLIC_CNT) {
698            ALOGE("getOutputForAttr():  invalid stream type");
699            return BAD_VALUE;
700        }
701        stream_type_to_audio_attributes(*stream, &attributes);
702    }
703    sp<SwAudioOutputDescriptor> desc;
704    if (mPolicyMixes.getOutputForAttr(attributes, uid, desc) == NO_ERROR) {
705        ALOG_ASSERT(desc != 0, "Invalid desc returned by getOutputForAttr");
706        if (!audio_has_proportional_frames(format)) {
707            return BAD_VALUE;
708        }
709        *stream = streamTypefromAttributesInt(&attributes);
710        *output = desc->mIoHandle;
711        ALOGV("getOutputForAttr() returns output %d", *output);
712        return NO_ERROR;
713    }
714    if (attributes.usage == AUDIO_USAGE_VIRTUAL_SOURCE) {
715        ALOGW("getOutputForAttr() no policy mix found for usage AUDIO_USAGE_VIRTUAL_SOURCE");
716        return BAD_VALUE;
717    }
718
719    ALOGV("getOutputForAttr() usage=%d, content=%d, tag=%s flags=%08x"
720            " session %d selectedDeviceId %d",
721            attributes.usage, attributes.content_type, attributes.tags, attributes.flags,
722            session, selectedDeviceId);
723
724    *stream = streamTypefromAttributesInt(&attributes);
725
726    // Explicit routing?
727    sp<DeviceDescriptor> deviceDesc;
728    for (size_t i = 0; i < mAvailableOutputDevices.size(); i++) {
729        if (mAvailableOutputDevices[i]->getId() == selectedDeviceId) {
730            deviceDesc = mAvailableOutputDevices[i];
731            break;
732        }
733    }
734    mOutputRoutes.addRoute(session, *stream, SessionRoute::SOURCE_TYPE_NA, deviceDesc, uid);
735
736    routing_strategy strategy = (routing_strategy) getStrategyForAttr(&attributes);
737    audio_devices_t device = getDeviceForStrategy(strategy, false /*fromCache*/);
738
739    if ((attributes.flags & AUDIO_FLAG_HW_AV_SYNC) != 0) {
740        flags = (audio_output_flags_t)(flags | AUDIO_OUTPUT_FLAG_HW_AV_SYNC);
741    }
742
743    ALOGV("getOutputForAttr() device 0x%x, samplingRate %d, format %x, channelMask %x, flags %x",
744          device, samplingRate, format, channelMask, flags);
745
746    *output = getOutputForDevice(device, session, *stream,
747                                 samplingRate, format, channelMask,
748                                 flags, offloadInfo);
749    if (*output == AUDIO_IO_HANDLE_NONE) {
750        mOutputRoutes.removeRoute(session);
751        return INVALID_OPERATION;
752    }
753
754    return NO_ERROR;
755}
756
757audio_io_handle_t AudioPolicyManager::getOutputForDevice(
758        audio_devices_t device,
759        audio_session_t session __unused,
760        audio_stream_type_t stream,
761        uint32_t samplingRate,
762        audio_format_t format,
763        audio_channel_mask_t channelMask,
764        audio_output_flags_t flags,
765        const audio_offload_info_t *offloadInfo)
766{
767    audio_io_handle_t output = AUDIO_IO_HANDLE_NONE;
768    uint32_t latency = 0;
769    status_t status;
770
771#ifdef AUDIO_POLICY_TEST
772    if (mCurOutput != 0) {
773        ALOGV("getOutput() test output mCurOutput %d, samplingRate %d, format %d, channelMask %x, mDirectOutput %d",
774                mCurOutput, mTestSamplingRate, mTestFormat, mTestChannels, mDirectOutput);
775
776        if (mTestOutputs[mCurOutput] == 0) {
777            ALOGV("getOutput() opening test output");
778            sp<AudioOutputDescriptor> outputDesc = new SwAudioOutputDescriptor(NULL,
779                                                                               mpClientInterface);
780            outputDesc->mDevice = mTestDevice;
781            outputDesc->mLatency = mTestLatencyMs;
782            outputDesc->mFlags =
783                    (audio_output_flags_t)(mDirectOutput ? AUDIO_OUTPUT_FLAG_DIRECT : 0);
784            outputDesc->mRefCount[stream] = 0;
785            audio_config_t config = AUDIO_CONFIG_INITIALIZER;
786            config.sample_rate = mTestSamplingRate;
787            config.channel_mask = mTestChannels;
788            config.format = mTestFormat;
789            if (offloadInfo != NULL) {
790                config.offload_info = *offloadInfo;
791            }
792            status = mpClientInterface->openOutput(0,
793                                                  &mTestOutputs[mCurOutput],
794                                                  &config,
795                                                  &outputDesc->mDevice,
796                                                  String8(""),
797                                                  &outputDesc->mLatency,
798                                                  outputDesc->mFlags);
799            if (status == NO_ERROR) {
800                outputDesc->mSamplingRate = config.sample_rate;
801                outputDesc->mFormat = config.format;
802                outputDesc->mChannelMask = config.channel_mask;
803                AudioParameter outputCmd = AudioParameter();
804                outputCmd.addInt(String8("set_id"),mCurOutput);
805                mpClientInterface->setParameters(mTestOutputs[mCurOutput],outputCmd.toString());
806                addOutput(mTestOutputs[mCurOutput], outputDesc);
807            }
808        }
809        return mTestOutputs[mCurOutput];
810    }
811#endif //AUDIO_POLICY_TEST
812
813    // open a direct output if required by specified parameters
814    //force direct flag if offload flag is set: offloading implies a direct output stream
815    // and all common behaviors are driven by checking only the direct flag
816    // this should normally be set appropriately in the policy configuration file
817    if ((flags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0) {
818        flags = (audio_output_flags_t)(flags | AUDIO_OUTPUT_FLAG_DIRECT);
819    }
820    if ((flags & AUDIO_OUTPUT_FLAG_HW_AV_SYNC) != 0) {
821        flags = (audio_output_flags_t)(flags | AUDIO_OUTPUT_FLAG_DIRECT);
822    }
823    // only allow deep buffering for music stream type
824    if (stream != AUDIO_STREAM_MUSIC) {
825        flags = (audio_output_flags_t)(flags &~AUDIO_OUTPUT_FLAG_DEEP_BUFFER);
826    } else if (/* stream == AUDIO_STREAM_MUSIC && */
827            flags == AUDIO_OUTPUT_FLAG_NONE &&
828            property_get_bool("audio.deep_buffer.media", false /* default_value */)) {
829        // use DEEP_BUFFER as default output for music stream type
830        flags = (audio_output_flags_t)AUDIO_OUTPUT_FLAG_DEEP_BUFFER;
831    }
832    if (stream == AUDIO_STREAM_TTS) {
833        flags = AUDIO_OUTPUT_FLAG_TTS;
834    }
835
836    sp<IOProfile> profile;
837
838    // skip direct output selection if the request can obviously be attached to a mixed output
839    // and not explicitly requested
840    if (((flags & AUDIO_OUTPUT_FLAG_DIRECT) == 0) &&
841            audio_is_linear_pcm(format) && samplingRate <= SAMPLE_RATE_HZ_MAX &&
842            audio_channel_count_from_out_mask(channelMask) <= 2) {
843        goto non_direct_output;
844    }
845
846    // Do not allow offloading if one non offloadable effect is enabled or MasterMono is enabled.
847    // This prevents creating an offloaded track and tearing it down immediately after start
848    // when audioflinger detects there is an active non offloadable effect.
849    // FIXME: We should check the audio session here but we do not have it in this context.
850    // This may prevent offloading in rare situations where effects are left active by apps
851    // in the background.
852
853    if (((flags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) == 0) ||
854            !(mEffects.isNonOffloadableEffectEnabled() || mMasterMono)) {
855        profile = getProfileForDirectOutput(device,
856                                           samplingRate,
857                                           format,
858                                           channelMask,
859                                           (audio_output_flags_t)flags);
860    }
861
862    if (profile != 0) {
863        sp<SwAudioOutputDescriptor> outputDesc = NULL;
864
865        for (size_t i = 0; i < mOutputs.size(); i++) {
866            sp<SwAudioOutputDescriptor> desc = mOutputs.valueAt(i);
867            if (!desc->isDuplicated() && (profile == desc->mProfile)) {
868                outputDesc = desc;
869                // reuse direct output if currently open and configured with same parameters
870                if ((samplingRate == outputDesc->mSamplingRate) &&
871                        audio_formats_match(format, outputDesc->mFormat) &&
872                        (channelMask == outputDesc->mChannelMask)) {
873                    outputDesc->mDirectOpenCount++;
874                    ALOGV("getOutput() reusing direct output %d", mOutputs.keyAt(i));
875                    return mOutputs.keyAt(i);
876                }
877            }
878        }
879        // close direct output if currently open and configured with different parameters
880        if (outputDesc != NULL) {
881            closeOutput(outputDesc->mIoHandle);
882        }
883
884        // if the selected profile is offloaded and no offload info was specified,
885        // create a default one
886        audio_offload_info_t defaultOffloadInfo = AUDIO_INFO_INITIALIZER;
887        if ((profile->getFlags() & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) && !offloadInfo) {
888            flags = (audio_output_flags_t)(flags | AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD);
889            defaultOffloadInfo.sample_rate = samplingRate;
890            defaultOffloadInfo.channel_mask = channelMask;
891            defaultOffloadInfo.format = format;
892            defaultOffloadInfo.stream_type = stream;
893            defaultOffloadInfo.bit_rate = 0;
894            defaultOffloadInfo.duration_us = -1;
895            defaultOffloadInfo.has_video = true; // conservative
896            defaultOffloadInfo.is_streaming = true; // likely
897            offloadInfo = &defaultOffloadInfo;
898        }
899
900        outputDesc = new SwAudioOutputDescriptor(profile, mpClientInterface);
901        outputDesc->mDevice = device;
902        outputDesc->mLatency = 0;
903        outputDesc->mFlags = (audio_output_flags_t)(outputDesc->mFlags | flags);
904        audio_config_t config = AUDIO_CONFIG_INITIALIZER;
905        config.sample_rate = samplingRate;
906        config.channel_mask = channelMask;
907        config.format = format;
908        if (offloadInfo != NULL) {
909            config.offload_info = *offloadInfo;
910        }
911        status = mpClientInterface->openOutput(profile->getModuleHandle(),
912                                               &output,
913                                               &config,
914                                               &outputDesc->mDevice,
915                                               String8(""),
916                                               &outputDesc->mLatency,
917                                               outputDesc->mFlags);
918
919        // only accept an output with the requested parameters
920        if (status != NO_ERROR ||
921            (samplingRate != 0 && samplingRate != config.sample_rate) ||
922            (format != AUDIO_FORMAT_DEFAULT && !audio_formats_match(format, config.format)) ||
923            (channelMask != 0 && channelMask != config.channel_mask)) {
924            ALOGV("getOutput() failed opening direct output: output %d samplingRate %d %d,"
925                    "format %d %d, channelMask %04x %04x", output, samplingRate,
926                    outputDesc->mSamplingRate, format, outputDesc->mFormat, channelMask,
927                    outputDesc->mChannelMask);
928            if (output != AUDIO_IO_HANDLE_NONE) {
929                mpClientInterface->closeOutput(output);
930            }
931            // fall back to mixer output if possible when the direct output could not be open
932            if (audio_is_linear_pcm(format) && samplingRate <= SAMPLE_RATE_HZ_MAX) {
933                goto non_direct_output;
934            }
935            return AUDIO_IO_HANDLE_NONE;
936        }
937        outputDesc->mSamplingRate = config.sample_rate;
938        outputDesc->mChannelMask = config.channel_mask;
939        outputDesc->mFormat = config.format;
940        outputDesc->mRefCount[stream] = 0;
941        outputDesc->mStopTime[stream] = 0;
942        outputDesc->mDirectOpenCount = 1;
943
944        audio_io_handle_t srcOutput = getOutputForEffect();
945        addOutput(output, outputDesc);
946        audio_io_handle_t dstOutput = getOutputForEffect();
947        if (dstOutput == output) {
948            mpClientInterface->moveEffects(AUDIO_SESSION_OUTPUT_MIX, srcOutput, dstOutput);
949        }
950        mPreviousOutputs = mOutputs;
951        ALOGV("getOutput() returns new direct output %d", output);
952        mpClientInterface->onAudioPortListUpdate();
953        return output;
954    }
955
956non_direct_output:
957
958    // A request for HW A/V sync cannot fallback to a mixed output because time
959    // stamps are embedded in audio data
960    if ((flags & AUDIO_OUTPUT_FLAG_HW_AV_SYNC) != 0) {
961        return AUDIO_IO_HANDLE_NONE;
962    }
963
964    // ignoring channel mask due to downmix capability in mixer
965
966    // open a non direct output
967
968    // for non direct outputs, only PCM is supported
969    if (audio_is_linear_pcm(format)) {
970        // get which output is suitable for the specified stream. The actual
971        // routing change will happen when startOutput() will be called
972        SortedVector<audio_io_handle_t> outputs = getOutputsForDevice(device, mOutputs);
973
974        // at this stage we should ignore the DIRECT flag as no direct output could be found earlier
975        flags = (audio_output_flags_t)(flags & ~AUDIO_OUTPUT_FLAG_DIRECT);
976        output = selectOutput(outputs, flags, format);
977    }
978    ALOGW_IF((output == 0), "getOutput() could not find output for stream %d, samplingRate %d,"
979            "format %d, channels %x, flags %x", stream, samplingRate, format, channelMask, flags);
980
981    ALOGV("  getOutputForDevice() returns output %d", output);
982
983    return output;
984}
985
986audio_io_handle_t AudioPolicyManager::selectOutput(const SortedVector<audio_io_handle_t>& outputs,
987                                                       audio_output_flags_t flags,
988                                                       audio_format_t format)
989{
990    // select one output among several that provide a path to a particular device or set of
991    // devices (the list was previously build by getOutputsForDevice()).
992    // The priority is as follows:
993    // 1: the output with the highest number of requested policy flags
994    // 2: the output with the bit depth the closest to the requested one
995    // 3: the primary output
996    // 4: the first output in the list
997
998    if (outputs.size() == 0) {
999        return 0;
1000    }
1001    if (outputs.size() == 1) {
1002        return outputs[0];
1003    }
1004
1005    int maxCommonFlags = 0;
1006    audio_io_handle_t outputForFlags = 0;
1007    audio_io_handle_t outputForPrimary = 0;
1008    audio_io_handle_t outputForFormat = 0;
1009    audio_format_t bestFormat = AUDIO_FORMAT_INVALID;
1010    audio_format_t bestFormatForFlags = AUDIO_FORMAT_INVALID;
1011
1012    for (size_t i = 0; i < outputs.size(); i++) {
1013        sp<SwAudioOutputDescriptor> outputDesc = mOutputs.valueFor(outputs[i]);
1014        if (!outputDesc->isDuplicated()) {
1015            // if a valid format is specified, skip output if not compatible
1016            if (format != AUDIO_FORMAT_INVALID) {
1017                if (outputDesc->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) {
1018                    if (!audio_formats_match(format, outputDesc->mFormat)) {
1019                        continue;
1020                    }
1021                } else if (!audio_is_linear_pcm(format)) {
1022                    continue;
1023                }
1024                if (AudioPort::isBetterFormatMatch(
1025                        outputDesc->mFormat, bestFormat, format)) {
1026                    outputForFormat = outputs[i];
1027                    bestFormat = outputDesc->mFormat;
1028                }
1029            }
1030
1031            int commonFlags = popcount(outputDesc->mProfile->getFlags() & flags);
1032            if (commonFlags >= maxCommonFlags) {
1033                if (commonFlags == maxCommonFlags) {
1034                    if (AudioPort::isBetterFormatMatch(
1035                            outputDesc->mFormat, bestFormatForFlags, format)) {
1036                        outputForFlags = outputs[i];
1037                        bestFormatForFlags = outputDesc->mFormat;
1038                    }
1039                } else {
1040                    outputForFlags = outputs[i];
1041                    maxCommonFlags = commonFlags;
1042                    bestFormatForFlags = outputDesc->mFormat;
1043                }
1044                ALOGV("selectOutput() commonFlags for output %d, %04x", outputs[i], commonFlags);
1045            }
1046            if (outputDesc->mProfile->getFlags() & AUDIO_OUTPUT_FLAG_PRIMARY) {
1047                outputForPrimary = outputs[i];
1048            }
1049        }
1050    }
1051
1052    if (outputForFlags != 0) {
1053        return outputForFlags;
1054    }
1055    if (outputForFormat != 0) {
1056        return outputForFormat;
1057    }
1058    if (outputForPrimary != 0) {
1059        return outputForPrimary;
1060    }
1061
1062    return outputs[0];
1063}
1064
1065status_t AudioPolicyManager::startOutput(audio_io_handle_t output,
1066                                             audio_stream_type_t stream,
1067                                             audio_session_t session)
1068{
1069    ALOGV("startOutput() output %d, stream %d, session %d",
1070          output, stream, session);
1071    ssize_t index = mOutputs.indexOfKey(output);
1072    if (index < 0) {
1073        ALOGW("startOutput() unknown output %d", output);
1074        return BAD_VALUE;
1075    }
1076
1077    sp<SwAudioOutputDescriptor> outputDesc = mOutputs.valueAt(index);
1078
1079    // Routing?
1080    mOutputRoutes.incRouteActivity(session);
1081
1082    audio_devices_t newDevice;
1083    if (outputDesc->mPolicyMix != NULL) {
1084        newDevice = AUDIO_DEVICE_OUT_REMOTE_SUBMIX;
1085    } else if (mOutputRoutes.hasRouteChanged(session)) {
1086        newDevice = getNewOutputDevice(outputDesc, false /*fromCache*/);
1087        checkStrategyRoute(getStrategy(stream), output);
1088    } else {
1089        newDevice = AUDIO_DEVICE_NONE;
1090    }
1091
1092    uint32_t delayMs = 0;
1093
1094    status_t status = startSource(outputDesc, stream, newDevice, &delayMs);
1095
1096    if (status != NO_ERROR) {
1097        mOutputRoutes.decRouteActivity(session);
1098        return status;
1099    }
1100    // Automatically enable the remote submix input when output is started on a re routing mix
1101    // of type MIX_TYPE_RECORDERS
1102    if (audio_is_remote_submix_device(newDevice) && outputDesc->mPolicyMix != NULL &&
1103            outputDesc->mPolicyMix->mMixType == MIX_TYPE_RECORDERS) {
1104            setDeviceConnectionStateInt(AUDIO_DEVICE_IN_REMOTE_SUBMIX,
1105                    AUDIO_POLICY_DEVICE_STATE_AVAILABLE,
1106                    outputDesc->mPolicyMix->mDeviceAddress,
1107                    "remote-submix");
1108    }
1109
1110    if (delayMs != 0) {
1111        usleep(delayMs * 1000);
1112    }
1113
1114    return status;
1115}
1116
1117status_t AudioPolicyManager::startSource(sp<AudioOutputDescriptor> outputDesc,
1118                                             audio_stream_type_t stream,
1119                                             audio_devices_t device,
1120                                             uint32_t *delayMs)
1121{
1122    // cannot start playback of STREAM_TTS if any other output is being used
1123    uint32_t beaconMuteLatency = 0;
1124
1125    *delayMs = 0;
1126    if (stream == AUDIO_STREAM_TTS) {
1127        ALOGV("\t found BEACON stream");
1128        if (!mTtsOutputAvailable && mOutputs.isAnyOutputActive(AUDIO_STREAM_TTS /*streamToIgnore*/)) {
1129            return INVALID_OPERATION;
1130        } else {
1131            beaconMuteLatency = handleEventForBeacon(STARTING_BEACON);
1132        }
1133    } else {
1134        // some playback other than beacon starts
1135        beaconMuteLatency = handleEventForBeacon(STARTING_OUTPUT);
1136    }
1137
1138    // check active before incrementing usage count
1139    bool force = !outputDesc->isActive();
1140
1141    // increment usage count for this stream on the requested output:
1142    // NOTE that the usage count is the same for duplicated output and hardware output which is
1143    // necessary for a correct control of hardware output routing by startOutput() and stopOutput()
1144    outputDesc->changeRefCount(stream, 1);
1145
1146    if (outputDesc->mRefCount[stream] == 1 || device != AUDIO_DEVICE_NONE) {
1147        // starting an output being rerouted?
1148        if (device == AUDIO_DEVICE_NONE) {
1149            device = getNewOutputDevice(outputDesc, false /*fromCache*/);
1150        }
1151        routing_strategy strategy = getStrategy(stream);
1152        bool shouldWait = (strategy == STRATEGY_SONIFICATION) ||
1153                            (strategy == STRATEGY_SONIFICATION_RESPECTFUL) ||
1154                            (beaconMuteLatency > 0);
1155        uint32_t waitMs = beaconMuteLatency;
1156        for (size_t i = 0; i < mOutputs.size(); i++) {
1157            sp<AudioOutputDescriptor> desc = mOutputs.valueAt(i);
1158            if (desc != outputDesc) {
1159                // force a device change if any other output is managed by the same hw
1160                // module and has a current device selection that differs from selected device.
1161                // In this case, the audio HAL must receive the new device selection so that it can
1162                // change the device currently selected by the other active output.
1163                if (outputDesc->sharesHwModuleWith(desc) &&
1164                    desc->device() != device) {
1165                    force = true;
1166                }
1167                // wait for audio on other active outputs to be presented when starting
1168                // a notification so that audio focus effect can propagate, or that a mute/unmute
1169                // event occurred for beacon
1170                uint32_t latency = desc->latency();
1171                if (shouldWait && desc->isActive(latency * 2) && (waitMs < latency)) {
1172                    waitMs = latency;
1173                }
1174            }
1175        }
1176        uint32_t muteWaitMs = setOutputDevice(outputDesc, device, force);
1177
1178        // handle special case for sonification while in call
1179        if (isInCall()) {
1180            handleIncallSonification(stream, true, false);
1181        }
1182
1183        // apply volume rules for current stream and device if necessary
1184        checkAndSetVolume(stream,
1185                          mVolumeCurves->getVolumeIndex(stream, device),
1186                          outputDesc,
1187                          device);
1188
1189        // update the outputs if starting an output with a stream that can affect notification
1190        // routing
1191        handleNotificationRoutingForStream(stream);
1192
1193        // force reevaluating accessibility routing when ringtone or alarm starts
1194        if (strategy == STRATEGY_SONIFICATION) {
1195            mpClientInterface->invalidateStream(AUDIO_STREAM_ACCESSIBILITY);
1196        }
1197    }
1198    return NO_ERROR;
1199}
1200
1201
1202status_t AudioPolicyManager::stopOutput(audio_io_handle_t output,
1203                                            audio_stream_type_t stream,
1204                                            audio_session_t session)
1205{
1206    ALOGV("stopOutput() output %d, stream %d, session %d", output, stream, session);
1207    ssize_t index = mOutputs.indexOfKey(output);
1208    if (index < 0) {
1209        ALOGW("stopOutput() unknown output %d", output);
1210        return BAD_VALUE;
1211    }
1212
1213    sp<SwAudioOutputDescriptor> outputDesc = mOutputs.valueAt(index);
1214
1215    if (outputDesc->mRefCount[stream] == 1) {
1216        // Automatically disable the remote submix input when output is stopped on a
1217        // re routing mix of type MIX_TYPE_RECORDERS
1218        if (audio_is_remote_submix_device(outputDesc->mDevice) &&
1219                outputDesc->mPolicyMix != NULL &&
1220                outputDesc->mPolicyMix->mMixType == MIX_TYPE_RECORDERS) {
1221            setDeviceConnectionStateInt(AUDIO_DEVICE_IN_REMOTE_SUBMIX,
1222                    AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE,
1223                    outputDesc->mPolicyMix->mDeviceAddress,
1224                    "remote-submix");
1225        }
1226    }
1227
1228    // Routing?
1229    bool forceDeviceUpdate = false;
1230    if (outputDesc->mRefCount[stream] > 0) {
1231        int activityCount = mOutputRoutes.decRouteActivity(session);
1232        forceDeviceUpdate = (mOutputRoutes.hasRoute(session) && (activityCount == 0));
1233
1234        if (forceDeviceUpdate) {
1235            checkStrategyRoute(getStrategy(stream), AUDIO_IO_HANDLE_NONE);
1236        }
1237    }
1238
1239    return stopSource(outputDesc, stream, forceDeviceUpdate);
1240}
1241
1242status_t AudioPolicyManager::stopSource(sp<AudioOutputDescriptor> outputDesc,
1243                                            audio_stream_type_t stream,
1244                                            bool forceDeviceUpdate)
1245{
1246    // always handle stream stop, check which stream type is stopping
1247    handleEventForBeacon(stream == AUDIO_STREAM_TTS ? STOPPING_BEACON : STOPPING_OUTPUT);
1248
1249    // handle special case for sonification while in call
1250    if (isInCall()) {
1251        handleIncallSonification(stream, false, false);
1252    }
1253
1254    if (outputDesc->mRefCount[stream] > 0) {
1255        // decrement usage count of this stream on the output
1256        outputDesc->changeRefCount(stream, -1);
1257
1258        // store time at which the stream was stopped - see isStreamActive()
1259        if (outputDesc->mRefCount[stream] == 0 || forceDeviceUpdate) {
1260            outputDesc->mStopTime[stream] = systemTime();
1261            audio_devices_t newDevice = getNewOutputDevice(outputDesc, false /*fromCache*/);
1262            // delay the device switch by twice the latency because stopOutput() is executed when
1263            // the track stop() command is received and at that time the audio track buffer can
1264            // still contain data that needs to be drained. The latency only covers the audio HAL
1265            // and kernel buffers. Also the latency does not always include additional delay in the
1266            // audio path (audio DSP, CODEC ...)
1267            setOutputDevice(outputDesc, newDevice, false, outputDesc->latency()*2);
1268
1269            // force restoring the device selection on other active outputs if it differs from the
1270            // one being selected for this output
1271            for (size_t i = 0; i < mOutputs.size(); i++) {
1272                audio_io_handle_t curOutput = mOutputs.keyAt(i);
1273                sp<AudioOutputDescriptor> desc = mOutputs.valueAt(i);
1274                if (desc != outputDesc &&
1275                        desc->isActive() &&
1276                        outputDesc->sharesHwModuleWith(desc) &&
1277                        (newDevice != desc->device())) {
1278                    setOutputDevice(desc,
1279                                    getNewOutputDevice(desc, false /*fromCache*/),
1280                                    true,
1281                                    outputDesc->latency()*2);
1282                }
1283            }
1284            // update the outputs if stopping one with a stream that can affect notification routing
1285            handleNotificationRoutingForStream(stream);
1286        }
1287        return NO_ERROR;
1288    } else {
1289        ALOGW("stopOutput() refcount is already 0");
1290        return INVALID_OPERATION;
1291    }
1292}
1293
1294void AudioPolicyManager::releaseOutput(audio_io_handle_t output,
1295                                       audio_stream_type_t stream __unused,
1296                                       audio_session_t session __unused)
1297{
1298    ALOGV("releaseOutput() %d", output);
1299    ssize_t index = mOutputs.indexOfKey(output);
1300    if (index < 0) {
1301        ALOGW("releaseOutput() releasing unknown output %d", output);
1302        return;
1303    }
1304
1305#ifdef AUDIO_POLICY_TEST
1306    int testIndex = testOutputIndex(output);
1307    if (testIndex != 0) {
1308        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(index);
1309        if (outputDesc->isActive()) {
1310            mpClientInterface->closeOutput(output);
1311            removeOutput(output);
1312            mTestOutputs[testIndex] = 0;
1313        }
1314        return;
1315    }
1316#endif //AUDIO_POLICY_TEST
1317
1318    // Routing
1319    mOutputRoutes.removeRoute(session);
1320
1321    sp<SwAudioOutputDescriptor> desc = mOutputs.valueAt(index);
1322    if (desc->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) {
1323        if (desc->mDirectOpenCount <= 0) {
1324            ALOGW("releaseOutput() invalid open count %d for output %d",
1325                                                              desc->mDirectOpenCount, output);
1326            return;
1327        }
1328        if (--desc->mDirectOpenCount == 0) {
1329            closeOutput(output);
1330            // If effects where present on the output, audioflinger moved them to the primary
1331            // output by default: move them back to the appropriate output.
1332            audio_io_handle_t dstOutput = getOutputForEffect();
1333            if (hasPrimaryOutput() && dstOutput != mPrimaryOutput->mIoHandle) {
1334                mpClientInterface->moveEffects(AUDIO_SESSION_OUTPUT_MIX,
1335                                               mPrimaryOutput->mIoHandle, dstOutput);
1336            }
1337            mpClientInterface->onAudioPortListUpdate();
1338        }
1339    }
1340}
1341
1342
1343status_t AudioPolicyManager::getInputForAttr(const audio_attributes_t *attr,
1344                                             audio_io_handle_t *input,
1345                                             audio_session_t session,
1346                                             uid_t uid,
1347                                             uint32_t samplingRate,
1348                                             audio_format_t format,
1349                                             audio_channel_mask_t channelMask,
1350                                             audio_input_flags_t flags,
1351                                             audio_port_handle_t selectedDeviceId,
1352                                             input_type_t *inputType)
1353{
1354    ALOGV("getInputForAttr() source %d, samplingRate %d, format %d, channelMask %x,"
1355            "session %d, flags %#x",
1356          attr->source, samplingRate, format, channelMask, session, flags);
1357
1358    *input = AUDIO_IO_HANDLE_NONE;
1359    *inputType = API_INPUT_INVALID;
1360    audio_devices_t device;
1361    // handle legacy remote submix case where the address was not always specified
1362    String8 address = String8("");
1363    audio_source_t inputSource = attr->source;
1364    audio_source_t halInputSource;
1365    AudioMix *policyMix = NULL;
1366
1367    if (inputSource == AUDIO_SOURCE_DEFAULT) {
1368        inputSource = AUDIO_SOURCE_MIC;
1369    }
1370    halInputSource = inputSource;
1371
1372    // Explicit routing?
1373    sp<DeviceDescriptor> deviceDesc;
1374    for (size_t i = 0; i < mAvailableInputDevices.size(); i++) {
1375        if (mAvailableInputDevices[i]->getId() == selectedDeviceId) {
1376            deviceDesc = mAvailableInputDevices[i];
1377            break;
1378        }
1379    }
1380    mInputRoutes.addRoute(session, SessionRoute::STREAM_TYPE_NA, inputSource, deviceDesc, uid);
1381
1382    if (inputSource == AUDIO_SOURCE_REMOTE_SUBMIX &&
1383            strncmp(attr->tags, "addr=", strlen("addr=")) == 0) {
1384        status_t ret = mPolicyMixes.getInputMixForAttr(*attr, &policyMix);
1385        if (ret != NO_ERROR) {
1386            return ret;
1387        }
1388        *inputType = API_INPUT_MIX_EXT_POLICY_REROUTE;
1389        device = AUDIO_DEVICE_IN_REMOTE_SUBMIX;
1390        address = String8(attr->tags + strlen("addr="));
1391    } else {
1392        device = getDeviceAndMixForInputSource(inputSource, &policyMix);
1393        if (device == AUDIO_DEVICE_NONE) {
1394            ALOGW("getInputForAttr() could not find device for source %d", inputSource);
1395            return BAD_VALUE;
1396        }
1397        if (policyMix != NULL) {
1398            address = policyMix->mDeviceAddress;
1399            if (policyMix->mMixType == MIX_TYPE_RECORDERS) {
1400                // there is an external policy, but this input is attached to a mix of recorders,
1401                // meaning it receives audio injected into the framework, so the recorder doesn't
1402                // know about it and is therefore considered "legacy"
1403                *inputType = API_INPUT_LEGACY;
1404            } else {
1405                // recording a mix of players defined by an external policy, we're rerouting for
1406                // an external policy
1407                *inputType = API_INPUT_MIX_EXT_POLICY_REROUTE;
1408            }
1409        } else if (audio_is_remote_submix_device(device)) {
1410            address = String8("0");
1411            *inputType = API_INPUT_MIX_CAPTURE;
1412        } else if (device == AUDIO_DEVICE_IN_TELEPHONY_RX) {
1413            *inputType = API_INPUT_TELEPHONY_RX;
1414        } else {
1415            *inputType = API_INPUT_LEGACY;
1416        }
1417
1418    }
1419
1420    *input = getInputForDevice(device, address, session, uid, inputSource,
1421                               samplingRate, format, channelMask, flags,
1422                               policyMix);
1423    if (*input == AUDIO_IO_HANDLE_NONE) {
1424        mInputRoutes.removeRoute(session);
1425        return INVALID_OPERATION;
1426    }
1427    ALOGV("getInputForAttr() returns input type = %d", *inputType);
1428    return NO_ERROR;
1429}
1430
1431
1432audio_io_handle_t AudioPolicyManager::getInputForDevice(audio_devices_t device,
1433                                                        String8 address,
1434                                                        audio_session_t session,
1435                                                        uid_t uid,
1436                                                        audio_source_t inputSource,
1437                                                        uint32_t samplingRate,
1438                                                        audio_format_t format,
1439                                                        audio_channel_mask_t channelMask,
1440                                                        audio_input_flags_t flags,
1441                                                        AudioMix *policyMix)
1442{
1443    audio_io_handle_t input = AUDIO_IO_HANDLE_NONE;
1444    audio_source_t halInputSource = inputSource;
1445    bool isSoundTrigger = false;
1446
1447    if (inputSource == AUDIO_SOURCE_HOTWORD) {
1448        ssize_t index = mSoundTriggerSessions.indexOfKey(session);
1449        if (index >= 0) {
1450            input = mSoundTriggerSessions.valueFor(session);
1451            isSoundTrigger = true;
1452            flags = (audio_input_flags_t)(flags | AUDIO_INPUT_FLAG_HW_HOTWORD);
1453            ALOGV("SoundTrigger capture on session %d input %d", session, input);
1454        } else {
1455            halInputSource = AUDIO_SOURCE_VOICE_RECOGNITION;
1456        }
1457    }
1458
1459    // find a compatible input profile (not necessarily identical in parameters)
1460    sp<IOProfile> profile;
1461    // samplingRate and flags may be updated by getInputProfile
1462    uint32_t profileSamplingRate = (samplingRate == 0) ? SAMPLE_RATE_HZ_DEFAULT : samplingRate;
1463    audio_format_t profileFormat = format;
1464    audio_channel_mask_t profileChannelMask = channelMask;
1465    audio_input_flags_t profileFlags = flags;
1466    for (;;) {
1467        profile = getInputProfile(device, address,
1468                                  profileSamplingRate, profileFormat, profileChannelMask,
1469                                  profileFlags);
1470        if (profile != 0) {
1471            break; // success
1472        } else if (profileFlags != AUDIO_INPUT_FLAG_NONE) {
1473            profileFlags = AUDIO_INPUT_FLAG_NONE; // retry
1474        } else { // fail
1475            ALOGW("getInputForDevice() could not find profile for device 0x%X,"
1476                  "samplingRate %u, format %#x, channelMask 0x%X, flags %#x",
1477                    device, samplingRate, format, channelMask, flags);
1478            return input;
1479        }
1480    }
1481    // Pick input sampling rate if not specified by client
1482    if (samplingRate == 0) {
1483        samplingRate = profileSamplingRate;
1484    }
1485
1486    if (profile->getModuleHandle() == 0) {
1487        ALOGE("getInputForAttr(): HW module %s not opened", profile->getModuleName());
1488        return input;
1489    }
1490
1491    sp<AudioSession> audioSession = new AudioSession(session,
1492                                                              inputSource,
1493                                                              format,
1494                                                              samplingRate,
1495                                                              channelMask,
1496                                                              flags,
1497                                                              uid,
1498                                                              isSoundTrigger,
1499                                                              policyMix, mpClientInterface);
1500
1501// TODO enable input reuse
1502#if 0
1503    // reuse an open input if possible
1504    for (size_t i = 0; i < mInputs.size(); i++) {
1505        sp<AudioInputDescriptor> desc = mInputs.valueAt(i);
1506        // reuse input if it shares the same profile and same sound trigger attribute
1507        if (profile == desc->mProfile &&
1508            isSoundTrigger == desc->isSoundTrigger()) {
1509
1510            sp<AudioSession> as = desc->getAudioSession(session);
1511            if (as != 0) {
1512                // do not allow unmatching properties on same session
1513                if (as->matches(audioSession)) {
1514                    as->changeOpenCount(1);
1515                } else {
1516                    ALOGW("getInputForDevice() record with different attributes"
1517                          " exists for session %d", session);
1518                    return input;
1519                }
1520            } else {
1521                desc->addAudioSession(session, audioSession);
1522            }
1523            ALOGV("getInputForDevice() reusing input %d", mInputs.keyAt(i));
1524            return mInputs.keyAt(i);
1525        }
1526    }
1527#endif
1528
1529    audio_config_t config = AUDIO_CONFIG_INITIALIZER;
1530    config.sample_rate = profileSamplingRate;
1531    config.channel_mask = profileChannelMask;
1532    config.format = profileFormat;
1533
1534    status_t status = mpClientInterface->openInput(profile->getModuleHandle(),
1535                                                   &input,
1536                                                   &config,
1537                                                   &device,
1538                                                   address,
1539                                                   halInputSource,
1540                                                   profileFlags);
1541
1542    // only accept input with the exact requested set of parameters
1543    if (status != NO_ERROR || input == AUDIO_IO_HANDLE_NONE ||
1544        (profileSamplingRate != config.sample_rate) ||
1545        !audio_formats_match(profileFormat, config.format) ||
1546        (profileChannelMask != config.channel_mask)) {
1547        ALOGW("getInputForAttr() failed opening input: samplingRate %d"
1548              ", format %d, channelMask %x",
1549                samplingRate, format, channelMask);
1550        if (input != AUDIO_IO_HANDLE_NONE) {
1551            mpClientInterface->closeInput(input);
1552        }
1553        return AUDIO_IO_HANDLE_NONE;
1554    }
1555
1556    sp<AudioInputDescriptor> inputDesc = new AudioInputDescriptor(profile);
1557    inputDesc->mSamplingRate = profileSamplingRate;
1558    inputDesc->mFormat = profileFormat;
1559    inputDesc->mChannelMask = profileChannelMask;
1560    inputDesc->mDevice = device;
1561    inputDesc->mPolicyMix = policyMix;
1562    inputDesc->addAudioSession(session, audioSession);
1563
1564    addInput(input, inputDesc);
1565    mpClientInterface->onAudioPortListUpdate();
1566
1567    return input;
1568}
1569
1570status_t AudioPolicyManager::startInput(audio_io_handle_t input,
1571                                        audio_session_t session)
1572{
1573    ALOGV("startInput() input %d", input);
1574    ssize_t index = mInputs.indexOfKey(input);
1575    if (index < 0) {
1576        ALOGW("startInput() unknown input %d", input);
1577        return BAD_VALUE;
1578    }
1579    sp<AudioInputDescriptor> inputDesc = mInputs.valueAt(index);
1580
1581    sp<AudioSession> audioSession = inputDesc->getAudioSession(session);
1582    if (audioSession == 0) {
1583        ALOGW("startInput() unknown session %d on input %d", session, input);
1584        return BAD_VALUE;
1585    }
1586
1587    // virtual input devices are compatible with other input devices
1588    if (!is_virtual_input_device(inputDesc->mDevice)) {
1589
1590        // for a non-virtual input device, check if there is another (non-virtual) active input
1591        audio_io_handle_t activeInput = mInputs.getActiveInput();
1592        if (activeInput != 0 && activeInput != input) {
1593
1594            // If the already active input uses AUDIO_SOURCE_HOTWORD then it is closed,
1595            // otherwise the active input continues and the new input cannot be started.
1596            sp<AudioInputDescriptor> activeDesc = mInputs.valueFor(activeInput);
1597            if ((activeDesc->inputSource() == AUDIO_SOURCE_HOTWORD) &&
1598                    !activeDesc->hasPreemptedSession(session)) {
1599                ALOGW("startInput(%d) preempting low-priority input %d", input, activeInput);
1600                //FIXME: consider all active sessions
1601                AudioSessionCollection activeSessions = activeDesc->getActiveAudioSessions();
1602                audio_session_t activeSession = activeSessions.keyAt(0);
1603                SortedVector<audio_session_t> sessions =
1604                                           activeDesc->getPreemptedSessions();
1605                sessions.add(activeSession);
1606                inputDesc->setPreemptedSessions(sessions);
1607                stopInput(activeInput, activeSession);
1608                releaseInput(activeInput, activeSession);
1609            } else {
1610                ALOGE("startInput(%d) failed: other input %d already started", input, activeInput);
1611                return INVALID_OPERATION;
1612            }
1613        }
1614
1615        // Do not allow capture if an active voice call is using a software patch and
1616        // the call TX source device is on the same HW module.
1617        // FIXME: would be better to refine to only inputs whose profile connects to the
1618        // call TX device but this information is not in the audio patch
1619        if (mCallTxPatch != 0 &&
1620            inputDesc->getModuleHandle() == mCallTxPatch->mPatch.sources[0].ext.device.hw_module) {
1621            return INVALID_OPERATION;
1622        }
1623    }
1624
1625    // Routing?
1626    mInputRoutes.incRouteActivity(session);
1627
1628    if (!inputDesc->isActive() || mInputRoutes.hasRouteChanged(session)) {
1629        // if input maps to a dynamic policy with an activity listener, notify of state change
1630        if ((inputDesc->mPolicyMix != NULL)
1631                && ((inputDesc->mPolicyMix->mCbFlags & AudioMix::kCbFlagNotifyActivity) != 0)) {
1632            mpClientInterface->onDynamicPolicyMixStateUpdate(inputDesc->mPolicyMix->mDeviceAddress,
1633                    MIX_STATE_MIXING);
1634        }
1635
1636        if (mInputs.activeInputsCount() == 0) {
1637            SoundTrigger::setCaptureState(true);
1638        }
1639        setInputDevice(input, getNewInputDevice(input), true /* force */);
1640
1641        // automatically enable the remote submix output when input is started if not
1642        // used by a policy mix of type MIX_TYPE_RECORDERS
1643        // For remote submix (a virtual device), we open only one input per capture request.
1644        if (audio_is_remote_submix_device(inputDesc->mDevice)) {
1645            String8 address = String8("");
1646            if (inputDesc->mPolicyMix == NULL) {
1647                address = String8("0");
1648            } else if (inputDesc->mPolicyMix->mMixType == MIX_TYPE_PLAYERS) {
1649                address = inputDesc->mPolicyMix->mDeviceAddress;
1650            }
1651            if (address != "") {
1652                setDeviceConnectionStateInt(AUDIO_DEVICE_OUT_REMOTE_SUBMIX,
1653                        AUDIO_POLICY_DEVICE_STATE_AVAILABLE,
1654                        address, "remote-submix");
1655            }
1656        }
1657    }
1658
1659    ALOGV("AudioPolicyManager::startInput() input source = %d", audioSession->inputSource());
1660
1661    audioSession->changeActiveCount(1);
1662    return NO_ERROR;
1663}
1664
1665status_t AudioPolicyManager::stopInput(audio_io_handle_t input,
1666                                       audio_session_t session)
1667{
1668    ALOGV("stopInput() input %d", input);
1669    ssize_t index = mInputs.indexOfKey(input);
1670    if (index < 0) {
1671        ALOGW("stopInput() unknown input %d", input);
1672        return BAD_VALUE;
1673    }
1674    sp<AudioInputDescriptor> inputDesc = mInputs.valueAt(index);
1675
1676    sp<AudioSession> audioSession = inputDesc->getAudioSession(session);
1677    if (index < 0) {
1678        ALOGW("stopInput() unknown session %d on input %d", session, input);
1679        return BAD_VALUE;
1680    }
1681
1682    if (audioSession->activeCount() == 0) {
1683        ALOGW("stopInput() input %d already stopped", input);
1684        return INVALID_OPERATION;
1685    }
1686
1687    audioSession->changeActiveCount(-1);
1688
1689    // Routing?
1690    mInputRoutes.decRouteActivity(session);
1691
1692    if (!inputDesc->isActive()) {
1693        // if input maps to a dynamic policy with an activity listener, notify of state change
1694        if ((inputDesc->mPolicyMix != NULL)
1695                && ((inputDesc->mPolicyMix->mCbFlags & AudioMix::kCbFlagNotifyActivity) != 0)) {
1696            mpClientInterface->onDynamicPolicyMixStateUpdate(inputDesc->mPolicyMix->mDeviceAddress,
1697                    MIX_STATE_IDLE);
1698        }
1699
1700        // automatically disable the remote submix output when input is stopped if not
1701        // used by a policy mix of type MIX_TYPE_RECORDERS
1702        if (audio_is_remote_submix_device(inputDesc->mDevice)) {
1703            String8 address = String8("");
1704            if (inputDesc->mPolicyMix == NULL) {
1705                address = String8("0");
1706            } else if (inputDesc->mPolicyMix->mMixType == MIX_TYPE_PLAYERS) {
1707                address = inputDesc->mPolicyMix->mDeviceAddress;
1708            }
1709            if (address != "") {
1710                setDeviceConnectionStateInt(AUDIO_DEVICE_OUT_REMOTE_SUBMIX,
1711                                         AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE,
1712                                         address, "remote-submix");
1713            }
1714        }
1715
1716        resetInputDevice(input);
1717
1718        if (mInputs.activeInputsCount() == 0) {
1719            SoundTrigger::setCaptureState(false);
1720        }
1721        inputDesc->clearPreemptedSessions();
1722    }
1723    return NO_ERROR;
1724}
1725
1726void AudioPolicyManager::releaseInput(audio_io_handle_t input,
1727                                      audio_session_t session)
1728{
1729
1730    ALOGV("releaseInput() %d", input);
1731    ssize_t index = mInputs.indexOfKey(input);
1732    if (index < 0) {
1733        ALOGW("releaseInput() releasing unknown input %d", input);
1734        return;
1735    }
1736
1737    // Routing
1738    mInputRoutes.removeRoute(session);
1739
1740    sp<AudioInputDescriptor> inputDesc = mInputs.valueAt(index);
1741    ALOG_ASSERT(inputDesc != 0);
1742
1743    sp<AudioSession> audioSession = inputDesc->getAudioSession(session);
1744    if (index < 0) {
1745        ALOGW("releaseInput() unknown session %d on input %d", session, input);
1746        return;
1747    }
1748
1749    if (audioSession->openCount() == 0) {
1750        ALOGW("releaseInput() invalid open count %d on session %d",
1751              audioSession->openCount(), session);
1752        return;
1753    }
1754
1755    if (audioSession->changeOpenCount(-1) == 0) {
1756        inputDesc->removeAudioSession(session);
1757    }
1758
1759    if (inputDesc->getOpenRefCount() > 0) {
1760        ALOGV("releaseInput() exit > 0");
1761        return;
1762    }
1763
1764    closeInput(input);
1765    mpClientInterface->onAudioPortListUpdate();
1766    ALOGV("releaseInput() exit");
1767}
1768
1769void AudioPolicyManager::closeAllInputs() {
1770    bool patchRemoved = false;
1771
1772    for(size_t input_index = 0; input_index < mInputs.size(); input_index++) {
1773        sp<AudioInputDescriptor> inputDesc = mInputs.valueAt(input_index);
1774        ssize_t patch_index = mAudioPatches.indexOfKey(inputDesc->getPatchHandle());
1775        if (patch_index >= 0) {
1776            sp<AudioPatch> patchDesc = mAudioPatches.valueAt(patch_index);
1777            status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, 0);
1778            mAudioPatches.removeItemsAt(patch_index);
1779            patchRemoved = true;
1780        }
1781        mpClientInterface->closeInput(mInputs.keyAt(input_index));
1782    }
1783    mInputs.clear();
1784    SoundTrigger::setCaptureState(false);
1785    nextAudioPortGeneration();
1786
1787    if (patchRemoved) {
1788        mpClientInterface->onAudioPatchListUpdate();
1789    }
1790}
1791
1792void AudioPolicyManager::initStreamVolume(audio_stream_type_t stream,
1793                                            int indexMin,
1794                                            int indexMax)
1795{
1796    ALOGV("initStreamVolume() stream %d, min %d, max %d", stream , indexMin, indexMax);
1797    mVolumeCurves->initStreamVolume(stream, indexMin, indexMax);
1798
1799    // initialize other private stream volumes which follow this one
1800    for (int curStream = 0; curStream < AUDIO_STREAM_FOR_POLICY_CNT; curStream++) {
1801        if (!streamsMatchForvolume(stream, (audio_stream_type_t)curStream)) {
1802            continue;
1803        }
1804        mVolumeCurves->initStreamVolume((audio_stream_type_t)curStream, indexMin, indexMax);
1805    }
1806}
1807
1808status_t AudioPolicyManager::setStreamVolumeIndex(audio_stream_type_t stream,
1809                                                  int index,
1810                                                  audio_devices_t device)
1811{
1812
1813    if ((index < mVolumeCurves->getVolumeIndexMin(stream)) ||
1814            (index > mVolumeCurves->getVolumeIndexMax(stream))) {
1815        return BAD_VALUE;
1816    }
1817    if (!audio_is_output_device(device)) {
1818        return BAD_VALUE;
1819    }
1820
1821    // Force max volume if stream cannot be muted
1822    if (!mVolumeCurves->canBeMuted(stream)) index = mVolumeCurves->getVolumeIndexMax(stream);
1823
1824    ALOGV("setStreamVolumeIndex() stream %d, device %04x, index %d",
1825          stream, device, index);
1826
1827    // if device is AUDIO_DEVICE_OUT_DEFAULT set default value and
1828    // clear all device specific values
1829    if (device == AUDIO_DEVICE_OUT_DEFAULT) {
1830        mVolumeCurves->clearCurrentVolumeIndex(stream);
1831    }
1832
1833    // update other private stream volumes which follow this one
1834    for (int curStream = 0; curStream < AUDIO_STREAM_FOR_POLICY_CNT; curStream++) {
1835        if (!streamsMatchForvolume(stream, (audio_stream_type_t)curStream)) {
1836            continue;
1837        }
1838        mVolumeCurves->addCurrentVolumeIndex((audio_stream_type_t)curStream, device, index);
1839    }
1840
1841    // update volume on all outputs whose current device is also selected by the same
1842    // strategy as the device specified by the caller
1843    status_t status = NO_ERROR;
1844    for (size_t i = 0; i < mOutputs.size(); i++) {
1845        sp<SwAudioOutputDescriptor> desc = mOutputs.valueAt(i);
1846        audio_devices_t curDevice = Volume::getDeviceForVolume(desc->device());
1847        for (int curStream = 0; curStream < AUDIO_STREAM_FOR_POLICY_CNT; curStream++) {
1848            if (!streamsMatchForvolume(stream, (audio_stream_type_t)curStream)) {
1849                continue;
1850            }
1851            routing_strategy curStrategy = getStrategy((audio_stream_type_t)curStream);
1852            audio_devices_t curStreamDevice = getDeviceForStrategy(curStrategy, true /*fromCache*/);
1853            // it is possible that the requested device is not selected by the strategy
1854            // (e.g an explicit audio patch is active causing getDevicesForStream()
1855            // to return this device. We must make sure that the device passed is part of the
1856            // devices considered when applying volume below.
1857            curStreamDevice |= device;
1858
1859            if (((device == AUDIO_DEVICE_OUT_DEFAULT) ||
1860                    ((curDevice & curStreamDevice) != 0))) {
1861                status_t volStatus =
1862                        checkAndSetVolume((audio_stream_type_t)curStream, index, desc, curDevice);
1863                if (volStatus != NO_ERROR) {
1864                    status = volStatus;
1865                }
1866            }
1867        }
1868    }
1869    return status;
1870}
1871
1872status_t AudioPolicyManager::getStreamVolumeIndex(audio_stream_type_t stream,
1873                                                      int *index,
1874                                                      audio_devices_t device)
1875{
1876    if (index == NULL) {
1877        return BAD_VALUE;
1878    }
1879    if (!audio_is_output_device(device)) {
1880        return BAD_VALUE;
1881    }
1882    // if device is AUDIO_DEVICE_OUT_DEFAULT, return volume for device corresponding to
1883    // the strategy the stream belongs to.
1884    if (device == AUDIO_DEVICE_OUT_DEFAULT) {
1885        device = getDeviceForStrategy(getStrategy(stream), true /*fromCache*/);
1886    }
1887    device = Volume::getDeviceForVolume(device);
1888
1889    *index =  mVolumeCurves->getVolumeIndex(stream, device);
1890    ALOGV("getStreamVolumeIndex() stream %d device %08x index %d", stream, device, *index);
1891    return NO_ERROR;
1892}
1893
1894audio_io_handle_t AudioPolicyManager::selectOutputForEffects(
1895                                            const SortedVector<audio_io_handle_t>& outputs)
1896{
1897    // select one output among several suitable for global effects.
1898    // The priority is as follows:
1899    // 1: An offloaded output. If the effect ends up not being offloadable,
1900    //    AudioFlinger will invalidate the track and the offloaded output
1901    //    will be closed causing the effect to be moved to a PCM output.
1902    // 2: A deep buffer output
1903    // 3: the first output in the list
1904
1905    if (outputs.size() == 0) {
1906        return 0;
1907    }
1908
1909    audio_io_handle_t outputOffloaded = 0;
1910    audio_io_handle_t outputDeepBuffer = 0;
1911
1912    for (size_t i = 0; i < outputs.size(); i++) {
1913        sp<SwAudioOutputDescriptor> desc = mOutputs.valueFor(outputs[i]);
1914        ALOGV("selectOutputForEffects outputs[%zu] flags %x", i, desc->mFlags);
1915        if ((desc->mFlags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0) {
1916            outputOffloaded = outputs[i];
1917        }
1918        if ((desc->mFlags & AUDIO_OUTPUT_FLAG_DEEP_BUFFER) != 0) {
1919            outputDeepBuffer = outputs[i];
1920        }
1921    }
1922
1923    ALOGV("selectOutputForEffects outputOffloaded %d outputDeepBuffer %d",
1924          outputOffloaded, outputDeepBuffer);
1925    if (outputOffloaded != 0) {
1926        return outputOffloaded;
1927    }
1928    if (outputDeepBuffer != 0) {
1929        return outputDeepBuffer;
1930    }
1931
1932    return outputs[0];
1933}
1934
1935audio_io_handle_t AudioPolicyManager::getOutputForEffect(const effect_descriptor_t *desc)
1936{
1937    // apply simple rule where global effects are attached to the same output as MUSIC streams
1938
1939    routing_strategy strategy = getStrategy(AUDIO_STREAM_MUSIC);
1940    audio_devices_t device = getDeviceForStrategy(strategy, false /*fromCache*/);
1941    SortedVector<audio_io_handle_t> dstOutputs = getOutputsForDevice(device, mOutputs);
1942
1943    audio_io_handle_t output = selectOutputForEffects(dstOutputs);
1944    ALOGV("getOutputForEffect() got output %d for fx %s flags %x",
1945          output, (desc == NULL) ? "unspecified" : desc->name,  (desc == NULL) ? 0 : desc->flags);
1946
1947    return output;
1948}
1949
1950status_t AudioPolicyManager::registerEffect(const effect_descriptor_t *desc,
1951                                audio_io_handle_t io,
1952                                uint32_t strategy,
1953                                int session,
1954                                int id)
1955{
1956    ssize_t index = mOutputs.indexOfKey(io);
1957    if (index < 0) {
1958        index = mInputs.indexOfKey(io);
1959        if (index < 0) {
1960            ALOGW("registerEffect() unknown io %d", io);
1961            return INVALID_OPERATION;
1962        }
1963    }
1964    return mEffects.registerEffect(desc, io, strategy, session, id);
1965}
1966
1967bool AudioPolicyManager::isStreamActive(audio_stream_type_t stream, uint32_t inPastMs) const
1968{
1969    bool active = false;
1970    for (int curStream = 0; curStream < AUDIO_STREAM_FOR_POLICY_CNT && !active; curStream++) {
1971        if (!streamsMatchForvolume(stream, (audio_stream_type_t)curStream)) {
1972            continue;
1973        }
1974        active = mOutputs.isStreamActive((audio_stream_type_t)curStream, inPastMs);
1975    }
1976    return active;
1977}
1978
1979bool AudioPolicyManager::isStreamActiveRemotely(audio_stream_type_t stream, uint32_t inPastMs) const
1980{
1981    return mOutputs.isStreamActiveRemotely(stream, inPastMs);
1982}
1983
1984bool AudioPolicyManager::isSourceActive(audio_source_t source) const
1985{
1986    for (size_t i = 0; i < mInputs.size(); i++) {
1987        const sp<AudioInputDescriptor>  inputDescriptor = mInputs.valueAt(i);
1988        if (inputDescriptor->isSourceActive(source)) {
1989            return true;
1990        }
1991    }
1992    return false;
1993}
1994
1995// Register a list of custom mixes with their attributes and format.
1996// When a mix is registered, corresponding input and output profiles are
1997// added to the remote submix hw module. The profile contains only the
1998// parameters (sampling rate, format...) specified by the mix.
1999// The corresponding input remote submix device is also connected.
2000//
2001// When a remote submix device is connected, the address is checked to select the
2002// appropriate profile and the corresponding input or output stream is opened.
2003//
2004// When capture starts, getInputForAttr() will:
2005//  - 1 look for a mix matching the address passed in attribtutes tags if any
2006//  - 2 if none found, getDeviceForInputSource() will:
2007//     - 2.1 look for a mix matching the attributes source
2008//     - 2.2 if none found, default to device selection by policy rules
2009// At this time, the corresponding output remote submix device is also connected
2010// and active playback use cases can be transferred to this mix if needed when reconnecting
2011// after AudioTracks are invalidated
2012//
2013// When playback starts, getOutputForAttr() will:
2014//  - 1 look for a mix matching the address passed in attribtutes tags if any
2015//  - 2 if none found, look for a mix matching the attributes usage
2016//  - 3 if none found, default to device and output selection by policy rules.
2017
2018status_t AudioPolicyManager::registerPolicyMixes(Vector<AudioMix> mixes)
2019{
2020    ALOGV("registerPolicyMixes() %zu mix(es)", mixes.size());
2021    status_t res = NO_ERROR;
2022
2023    sp<HwModule> rSubmixModule;
2024    // examine each mix's route type
2025    for (size_t i = 0; i < mixes.size(); i++) {
2026        // we only support MIX_ROUTE_FLAG_LOOP_BACK or MIX_ROUTE_FLAG_RENDER, not the combination
2027        if ((mixes[i].mRouteFlags & MIX_ROUTE_FLAG_ALL) == MIX_ROUTE_FLAG_ALL) {
2028            res = INVALID_OPERATION;
2029            break;
2030        }
2031        if ((mixes[i].mRouteFlags & MIX_ROUTE_FLAG_LOOP_BACK) == MIX_ROUTE_FLAG_LOOP_BACK) {
2032            // Loop back through "remote submix"
2033            if (rSubmixModule == 0) {
2034                for (size_t j = 0; i < mHwModules.size(); j++) {
2035                    if (strcmp(AUDIO_HARDWARE_MODULE_ID_REMOTE_SUBMIX, mHwModules[j]->mName) == 0
2036                            && mHwModules[j]->mHandle != 0) {
2037                        rSubmixModule = mHwModules[j];
2038                        break;
2039                    }
2040                }
2041            }
2042
2043            ALOGV("registerPolicyMixes() mix %zu of %zu is LOOP_BACK", i, mixes.size());
2044
2045            if (rSubmixModule == 0) {
2046                ALOGE(" Unable to find audio module for submix, aborting mix %zu registration", i);
2047                res = INVALID_OPERATION;
2048                break;
2049            }
2050
2051            String8 address = mixes[i].mDeviceAddress;
2052
2053            if (mPolicyMixes.registerMix(address, mixes[i], 0 /*output desc*/) != NO_ERROR) {
2054                ALOGE(" Error registering mix %zu for address %s", i, address.string());
2055                res = INVALID_OPERATION;
2056                break;
2057            }
2058            audio_config_t outputConfig = mixes[i].mFormat;
2059            audio_config_t inputConfig = mixes[i].mFormat;
2060            // NOTE: audio flinger mixer does not support mono output: configure remote submix HAL in
2061            // stereo and let audio flinger do the channel conversion if needed.
2062            outputConfig.channel_mask = AUDIO_CHANNEL_OUT_STEREO;
2063            inputConfig.channel_mask = AUDIO_CHANNEL_IN_STEREO;
2064            rSubmixModule->addOutputProfile(address, &outputConfig,
2065                    AUDIO_DEVICE_OUT_REMOTE_SUBMIX, address);
2066            rSubmixModule->addInputProfile(address, &inputConfig,
2067                    AUDIO_DEVICE_IN_REMOTE_SUBMIX, address);
2068
2069            if (mixes[i].mMixType == MIX_TYPE_PLAYERS) {
2070                setDeviceConnectionStateInt(AUDIO_DEVICE_IN_REMOTE_SUBMIX,
2071                        AUDIO_POLICY_DEVICE_STATE_AVAILABLE,
2072                        address.string(), "remote-submix");
2073            } else {
2074                setDeviceConnectionStateInt(AUDIO_DEVICE_OUT_REMOTE_SUBMIX,
2075                        AUDIO_POLICY_DEVICE_STATE_AVAILABLE,
2076                        address.string(), "remote-submix");
2077            }
2078        } else if ((mixes[i].mRouteFlags & MIX_ROUTE_FLAG_RENDER) == MIX_ROUTE_FLAG_RENDER) {
2079            String8 address = mixes[i].mDeviceAddress;
2080            audio_devices_t device = mixes[i].mDeviceType;
2081            ALOGV(" registerPolicyMixes() mix %zu of %zu is RENDER, dev=0x%X addr=%s",
2082                    i, mixes.size(), device, address.string());
2083
2084            bool foundOutput = false;
2085            for (size_t j = 0 ; j < mOutputs.size() ; j++) {
2086                sp<SwAudioOutputDescriptor> desc = mOutputs.valueAt(j);
2087                sp<AudioPatch> patch = mAudioPatches.valueFor(desc->getPatchHandle());
2088                if ((patch != 0) && (patch->mPatch.num_sinks != 0)
2089                        && (patch->mPatch.sinks[0].type == AUDIO_PORT_TYPE_DEVICE)
2090                        && (patch->mPatch.sinks[0].ext.device.type == device)
2091                        && (strncmp(patch->mPatch.sinks[0].ext.device.address, address.string(),
2092                                AUDIO_DEVICE_MAX_ADDRESS_LEN) == 0)) {
2093
2094                    if (mPolicyMixes.registerMix(address, mixes[i], desc) != NO_ERROR) {
2095                        res = INVALID_OPERATION;
2096                    } else {
2097                        foundOutput = true;
2098                    }
2099                    break;
2100                }
2101            }
2102
2103            if (res != NO_ERROR) {
2104                ALOGE(" Error registering mix %zu for device 0x%X addr %s",
2105                        i, device, address.string());
2106                res = INVALID_OPERATION;
2107                break;
2108            } else if (!foundOutput) {
2109                ALOGE(" Output not found for mix %zu for device 0x%X addr %s",
2110                        i, device, address.string());
2111                res = INVALID_OPERATION;
2112                break;
2113            }
2114        }
2115    }
2116    if (res != NO_ERROR) {
2117        unregisterPolicyMixes(mixes);
2118    }
2119    return res;
2120}
2121
2122status_t AudioPolicyManager::unregisterPolicyMixes(Vector<AudioMix> mixes)
2123{
2124    ALOGV("unregisterPolicyMixes() num mixes %zu", mixes.size());
2125    status_t res = NO_ERROR;
2126    sp<HwModule> rSubmixModule;
2127    // examine each mix's route type
2128    for (size_t i = 0; i < mixes.size(); i++) {
2129        if ((mixes[i].mRouteFlags & MIX_ROUTE_FLAG_LOOP_BACK) == MIX_ROUTE_FLAG_LOOP_BACK) {
2130
2131            if (rSubmixModule == 0) {
2132                for (size_t j = 0; i < mHwModules.size(); j++) {
2133                    if (strcmp(AUDIO_HARDWARE_MODULE_ID_REMOTE_SUBMIX, mHwModules[j]->mName) == 0
2134                            && mHwModules[j]->mHandle != 0) {
2135                        rSubmixModule = mHwModules[j];
2136                        break;
2137                    }
2138                }
2139            }
2140            if (rSubmixModule == 0) {
2141                res = INVALID_OPERATION;
2142                continue;
2143            }
2144
2145            String8 address = mixes[i].mDeviceAddress;
2146
2147            if (mPolicyMixes.unregisterMix(address) != NO_ERROR) {
2148                res = INVALID_OPERATION;
2149                continue;
2150            }
2151
2152            if (getDeviceConnectionState(AUDIO_DEVICE_IN_REMOTE_SUBMIX, address.string()) ==
2153                    AUDIO_POLICY_DEVICE_STATE_AVAILABLE)  {
2154                setDeviceConnectionStateInt(AUDIO_DEVICE_IN_REMOTE_SUBMIX,
2155                        AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE,
2156                        address.string(), "remote-submix");
2157            }
2158            if (getDeviceConnectionState(AUDIO_DEVICE_OUT_REMOTE_SUBMIX, address.string()) ==
2159                    AUDIO_POLICY_DEVICE_STATE_AVAILABLE)  {
2160                setDeviceConnectionStateInt(AUDIO_DEVICE_OUT_REMOTE_SUBMIX,
2161                        AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE,
2162                        address.string(), "remote-submix");
2163            }
2164            rSubmixModule->removeOutputProfile(address);
2165            rSubmixModule->removeInputProfile(address);
2166
2167        } if ((mixes[i].mRouteFlags & MIX_ROUTE_FLAG_RENDER) == MIX_ROUTE_FLAG_RENDER) {
2168            if (mPolicyMixes.unregisterMix(mixes[i].mDeviceAddress) != NO_ERROR) {
2169                res = INVALID_OPERATION;
2170                continue;
2171            }
2172        }
2173    }
2174    return res;
2175}
2176
2177
2178status_t AudioPolicyManager::dump(int fd)
2179{
2180    const size_t SIZE = 256;
2181    char buffer[SIZE];
2182    String8 result;
2183
2184    snprintf(buffer, SIZE, "\nAudioPolicyManager Dump: %p\n", this);
2185    result.append(buffer);
2186
2187    snprintf(buffer, SIZE, " Primary Output: %d\n",
2188             hasPrimaryOutput() ? mPrimaryOutput->mIoHandle : AUDIO_IO_HANDLE_NONE);
2189    result.append(buffer);
2190    snprintf(buffer, SIZE, " Phone state: %d\n", mEngine->getPhoneState());
2191    result.append(buffer);
2192    snprintf(buffer, SIZE, " Force use for communications %d\n",
2193             mEngine->getForceUse(AUDIO_POLICY_FORCE_FOR_COMMUNICATION));
2194    result.append(buffer);
2195    snprintf(buffer, SIZE, " Force use for media %d\n", mEngine->getForceUse(AUDIO_POLICY_FORCE_FOR_MEDIA));
2196    result.append(buffer);
2197    snprintf(buffer, SIZE, " Force use for record %d\n", mEngine->getForceUse(AUDIO_POLICY_FORCE_FOR_RECORD));
2198    result.append(buffer);
2199    snprintf(buffer, SIZE, " Force use for dock %d\n", mEngine->getForceUse(AUDIO_POLICY_FORCE_FOR_DOCK));
2200    result.append(buffer);
2201    snprintf(buffer, SIZE, " Force use for system %d\n", mEngine->getForceUse(AUDIO_POLICY_FORCE_FOR_SYSTEM));
2202    result.append(buffer);
2203    snprintf(buffer, SIZE, " Force use for hdmi system audio %d\n",
2204            mEngine->getForceUse(AUDIO_POLICY_FORCE_FOR_HDMI_SYSTEM_AUDIO));
2205    result.append(buffer);
2206    snprintf(buffer, SIZE, " Force use for encoded surround output %d\n",
2207            mEngine->getForceUse(AUDIO_POLICY_FORCE_FOR_ENCODED_SURROUND));
2208    result.append(buffer);
2209    snprintf(buffer, SIZE, " TTS output %s\n", mTtsOutputAvailable ? "available" : "not available");
2210    result.append(buffer);
2211    snprintf(buffer, SIZE, " Master mono: %s\n", mMasterMono ? "on" : "off");
2212    result.append(buffer);
2213
2214    write(fd, result.string(), result.size());
2215
2216    mAvailableOutputDevices.dump(fd, String8("Available output"));
2217    mAvailableInputDevices.dump(fd, String8("Available input"));
2218    mHwModules.dump(fd);
2219    mOutputs.dump(fd);
2220    mInputs.dump(fd);
2221    mVolumeCurves->dump(fd);
2222    mEffects.dump(fd);
2223    mAudioPatches.dump(fd);
2224
2225    return NO_ERROR;
2226}
2227
2228// This function checks for the parameters which can be offloaded.
2229// This can be enhanced depending on the capability of the DSP and policy
2230// of the system.
2231bool AudioPolicyManager::isOffloadSupported(const audio_offload_info_t& offloadInfo)
2232{
2233    ALOGV("isOffloadSupported: SR=%u, CM=0x%x, Format=0x%x, StreamType=%d,"
2234     " BitRate=%u, duration=%" PRId64 " us, has_video=%d",
2235     offloadInfo.sample_rate, offloadInfo.channel_mask,
2236     offloadInfo.format,
2237     offloadInfo.stream_type, offloadInfo.bit_rate, offloadInfo.duration_us,
2238     offloadInfo.has_video);
2239
2240    if (mMasterMono) {
2241        return false; // no offloading if mono is set.
2242    }
2243
2244    // Check if offload has been disabled
2245    char propValue[PROPERTY_VALUE_MAX];
2246    if (property_get("audio.offload.disable", propValue, "0")) {
2247        if (atoi(propValue) != 0) {
2248            ALOGV("offload disabled by audio.offload.disable=%s", propValue );
2249            return false;
2250        }
2251    }
2252
2253    // Check if stream type is music, then only allow offload as of now.
2254    if (offloadInfo.stream_type != AUDIO_STREAM_MUSIC)
2255    {
2256        ALOGV("isOffloadSupported: stream_type != MUSIC, returning false");
2257        return false;
2258    }
2259
2260    //TODO: enable audio offloading with video when ready
2261    const bool allowOffloadWithVideo =
2262            property_get_bool("audio.offload.video", false /* default_value */);
2263    if (offloadInfo.has_video && !allowOffloadWithVideo) {
2264        ALOGV("isOffloadSupported: has_video == true, returning false");
2265        return false;
2266    }
2267
2268    //If duration is less than minimum value defined in property, return false
2269    if (property_get("audio.offload.min.duration.secs", propValue, NULL)) {
2270        if (offloadInfo.duration_us < (atoi(propValue) * 1000000 )) {
2271            ALOGV("Offload denied by duration < audio.offload.min.duration.secs(=%s)", propValue);
2272            return false;
2273        }
2274    } else if (offloadInfo.duration_us < OFFLOAD_DEFAULT_MIN_DURATION_SECS * 1000000) {
2275        ALOGV("Offload denied by duration < default min(=%u)", OFFLOAD_DEFAULT_MIN_DURATION_SECS);
2276        return false;
2277    }
2278
2279    // Do not allow offloading if one non offloadable effect is enabled. This prevents from
2280    // creating an offloaded track and tearing it down immediately after start when audioflinger
2281    // detects there is an active non offloadable effect.
2282    // FIXME: We should check the audio session here but we do not have it in this context.
2283    // This may prevent offloading in rare situations where effects are left active by apps
2284    // in the background.
2285    if (mEffects.isNonOffloadableEffectEnabled()) {
2286        return false;
2287    }
2288
2289    // See if there is a profile to support this.
2290    // AUDIO_DEVICE_NONE
2291    sp<IOProfile> profile = getProfileForDirectOutput(AUDIO_DEVICE_NONE /*ignore device */,
2292                                            offloadInfo.sample_rate,
2293                                            offloadInfo.format,
2294                                            offloadInfo.channel_mask,
2295                                            AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD);
2296    ALOGV("isOffloadSupported() profile %sfound", profile != 0 ? "" : "NOT ");
2297    return (profile != 0);
2298}
2299
2300status_t AudioPolicyManager::listAudioPorts(audio_port_role_t role,
2301                                            audio_port_type_t type,
2302                                            unsigned int *num_ports,
2303                                            struct audio_port *ports,
2304                                            unsigned int *generation)
2305{
2306    if (num_ports == NULL || (*num_ports != 0 && ports == NULL) ||
2307            generation == NULL) {
2308        return BAD_VALUE;
2309    }
2310    ALOGV("listAudioPorts() role %d type %d num_ports %d ports %p", role, type, *num_ports, ports);
2311    if (ports == NULL) {
2312        *num_ports = 0;
2313    }
2314
2315    size_t portsWritten = 0;
2316    size_t portsMax = *num_ports;
2317    *num_ports = 0;
2318    if (type == AUDIO_PORT_TYPE_NONE || type == AUDIO_PORT_TYPE_DEVICE) {
2319        if (role == AUDIO_PORT_ROLE_SINK || role == AUDIO_PORT_ROLE_NONE) {
2320            for (size_t i = 0;
2321                    i  < mAvailableOutputDevices.size() && portsWritten < portsMax; i++) {
2322                mAvailableOutputDevices[i]->toAudioPort(&ports[portsWritten++]);
2323            }
2324            *num_ports += mAvailableOutputDevices.size();
2325        }
2326        if (role == AUDIO_PORT_ROLE_SOURCE || role == AUDIO_PORT_ROLE_NONE) {
2327            for (size_t i = 0;
2328                    i  < mAvailableInputDevices.size() && portsWritten < portsMax; i++) {
2329                mAvailableInputDevices[i]->toAudioPort(&ports[portsWritten++]);
2330            }
2331            *num_ports += mAvailableInputDevices.size();
2332        }
2333    }
2334    if (type == AUDIO_PORT_TYPE_NONE || type == AUDIO_PORT_TYPE_MIX) {
2335        if (role == AUDIO_PORT_ROLE_SINK || role == AUDIO_PORT_ROLE_NONE) {
2336            for (size_t i = 0; i < mInputs.size() && portsWritten < portsMax; i++) {
2337                mInputs[i]->toAudioPort(&ports[portsWritten++]);
2338            }
2339            *num_ports += mInputs.size();
2340        }
2341        if (role == AUDIO_PORT_ROLE_SOURCE || role == AUDIO_PORT_ROLE_NONE) {
2342            size_t numOutputs = 0;
2343            for (size_t i = 0; i < mOutputs.size(); i++) {
2344                if (!mOutputs[i]->isDuplicated()) {
2345                    numOutputs++;
2346                    if (portsWritten < portsMax) {
2347                        mOutputs[i]->toAudioPort(&ports[portsWritten++]);
2348                    }
2349                }
2350            }
2351            *num_ports += numOutputs;
2352        }
2353    }
2354    *generation = curAudioPortGeneration();
2355    ALOGV("listAudioPorts() got %zu ports needed %d", portsWritten, *num_ports);
2356    return NO_ERROR;
2357}
2358
2359status_t AudioPolicyManager::getAudioPort(struct audio_port *port __unused)
2360{
2361    return NO_ERROR;
2362}
2363
2364status_t AudioPolicyManager::createAudioPatch(const struct audio_patch *patch,
2365                                               audio_patch_handle_t *handle,
2366                                               uid_t uid)
2367{
2368    ALOGV("createAudioPatch()");
2369
2370    if (handle == NULL || patch == NULL) {
2371        return BAD_VALUE;
2372    }
2373    ALOGV("createAudioPatch() num sources %d num sinks %d", patch->num_sources, patch->num_sinks);
2374
2375    if (patch->num_sources == 0 || patch->num_sources > AUDIO_PATCH_PORTS_MAX ||
2376            patch->num_sinks == 0 || patch->num_sinks > AUDIO_PATCH_PORTS_MAX) {
2377        return BAD_VALUE;
2378    }
2379    // only one source per audio patch supported for now
2380    if (patch->num_sources > 1) {
2381        return INVALID_OPERATION;
2382    }
2383
2384    if (patch->sources[0].role != AUDIO_PORT_ROLE_SOURCE) {
2385        return INVALID_OPERATION;
2386    }
2387    for (size_t i = 0; i < patch->num_sinks; i++) {
2388        if (patch->sinks[i].role != AUDIO_PORT_ROLE_SINK) {
2389            return INVALID_OPERATION;
2390        }
2391    }
2392
2393    sp<AudioPatch> patchDesc;
2394    ssize_t index = mAudioPatches.indexOfKey(*handle);
2395
2396    ALOGV("createAudioPatch source id %d role %d type %d", patch->sources[0].id,
2397                                                           patch->sources[0].role,
2398                                                           patch->sources[0].type);
2399#if LOG_NDEBUG == 0
2400    for (size_t i = 0; i < patch->num_sinks; i++) {
2401        ALOGV("createAudioPatch sink %zu: id %d role %d type %d", i, patch->sinks[i].id,
2402                                                             patch->sinks[i].role,
2403                                                             patch->sinks[i].type);
2404    }
2405#endif
2406
2407    if (index >= 0) {
2408        patchDesc = mAudioPatches.valueAt(index);
2409        ALOGV("createAudioPatch() mUidCached %d patchDesc->mUid %d uid %d",
2410                                                                  mUidCached, patchDesc->mUid, uid);
2411        if (patchDesc->mUid != mUidCached && uid != patchDesc->mUid) {
2412            return INVALID_OPERATION;
2413        }
2414    } else {
2415        *handle = 0;
2416    }
2417
2418    if (patch->sources[0].type == AUDIO_PORT_TYPE_MIX) {
2419        sp<SwAudioOutputDescriptor> outputDesc = mOutputs.getOutputFromId(patch->sources[0].id);
2420        if (outputDesc == NULL) {
2421            ALOGV("createAudioPatch() output not found for id %d", patch->sources[0].id);
2422            return BAD_VALUE;
2423        }
2424        ALOG_ASSERT(!outputDesc->isDuplicated(),"duplicated output %d in source in ports",
2425                                                outputDesc->mIoHandle);
2426        if (patchDesc != 0) {
2427            if (patchDesc->mPatch.sources[0].id != patch->sources[0].id) {
2428                ALOGV("createAudioPatch() source id differs for patch current id %d new id %d",
2429                                          patchDesc->mPatch.sources[0].id, patch->sources[0].id);
2430                return BAD_VALUE;
2431            }
2432        }
2433        DeviceVector devices;
2434        for (size_t i = 0; i < patch->num_sinks; i++) {
2435            // Only support mix to devices connection
2436            // TODO add support for mix to mix connection
2437            if (patch->sinks[i].type != AUDIO_PORT_TYPE_DEVICE) {
2438                ALOGV("createAudioPatch() source mix but sink is not a device");
2439                return INVALID_OPERATION;
2440            }
2441            sp<DeviceDescriptor> devDesc =
2442                    mAvailableOutputDevices.getDeviceFromId(patch->sinks[i].id);
2443            if (devDesc == 0) {
2444                ALOGV("createAudioPatch() out device not found for id %d", patch->sinks[i].id);
2445                return BAD_VALUE;
2446            }
2447
2448            if (!outputDesc->mProfile->isCompatibleProfile(devDesc->type(),
2449                                                           devDesc->mAddress,
2450                                                           patch->sources[0].sample_rate,
2451                                                           NULL,  // updatedSamplingRate
2452                                                           patch->sources[0].format,
2453                                                           NULL,  // updatedFormat
2454                                                           patch->sources[0].channel_mask,
2455                                                           NULL,  // updatedChannelMask
2456                                                           AUDIO_OUTPUT_FLAG_NONE /*FIXME*/)) {
2457                ALOGV("createAudioPatch() profile not supported for device %08x",
2458                        devDesc->type());
2459                return INVALID_OPERATION;
2460            }
2461            devices.add(devDesc);
2462        }
2463        if (devices.size() == 0) {
2464            return INVALID_OPERATION;
2465        }
2466
2467        // TODO: reconfigure output format and channels here
2468        ALOGV("createAudioPatch() setting device %08x on output %d",
2469              devices.types(), outputDesc->mIoHandle);
2470        setOutputDevice(outputDesc, devices.types(), true, 0, handle);
2471        index = mAudioPatches.indexOfKey(*handle);
2472        if (index >= 0) {
2473            if (patchDesc != 0 && patchDesc != mAudioPatches.valueAt(index)) {
2474                ALOGW("createAudioPatch() setOutputDevice() did not reuse the patch provided");
2475            }
2476            patchDesc = mAudioPatches.valueAt(index);
2477            patchDesc->mUid = uid;
2478            ALOGV("createAudioPatch() success");
2479        } else {
2480            ALOGW("createAudioPatch() setOutputDevice() failed to create a patch");
2481            return INVALID_OPERATION;
2482        }
2483    } else if (patch->sources[0].type == AUDIO_PORT_TYPE_DEVICE) {
2484        if (patch->sinks[0].type == AUDIO_PORT_TYPE_MIX) {
2485            // input device to input mix connection
2486            // only one sink supported when connecting an input device to a mix
2487            if (patch->num_sinks > 1) {
2488                return INVALID_OPERATION;
2489            }
2490            sp<AudioInputDescriptor> inputDesc = mInputs.getInputFromId(patch->sinks[0].id);
2491            if (inputDesc == NULL) {
2492                return BAD_VALUE;
2493            }
2494            if (patchDesc != 0) {
2495                if (patchDesc->mPatch.sinks[0].id != patch->sinks[0].id) {
2496                    return BAD_VALUE;
2497                }
2498            }
2499            sp<DeviceDescriptor> devDesc =
2500                    mAvailableInputDevices.getDeviceFromId(patch->sources[0].id);
2501            if (devDesc == 0) {
2502                return BAD_VALUE;
2503            }
2504
2505            if (!inputDesc->mProfile->isCompatibleProfile(devDesc->type(),
2506                                                          devDesc->mAddress,
2507                                                          patch->sinks[0].sample_rate,
2508                                                          NULL, /*updatedSampleRate*/
2509                                                          patch->sinks[0].format,
2510                                                          NULL, /*updatedFormat*/
2511                                                          patch->sinks[0].channel_mask,
2512                                                          NULL, /*updatedChannelMask*/
2513                                                          // FIXME for the parameter type,
2514                                                          // and the NONE
2515                                                          (audio_output_flags_t)
2516                                                            AUDIO_INPUT_FLAG_NONE)) {
2517                return INVALID_OPERATION;
2518            }
2519            // TODO: reconfigure output format and channels here
2520            ALOGV("createAudioPatch() setting device %08x on output %d",
2521                                                  devDesc->type(), inputDesc->mIoHandle);
2522            setInputDevice(inputDesc->mIoHandle, devDesc->type(), true, handle);
2523            index = mAudioPatches.indexOfKey(*handle);
2524            if (index >= 0) {
2525                if (patchDesc != 0 && patchDesc != mAudioPatches.valueAt(index)) {
2526                    ALOGW("createAudioPatch() setInputDevice() did not reuse the patch provided");
2527                }
2528                patchDesc = mAudioPatches.valueAt(index);
2529                patchDesc->mUid = uid;
2530                ALOGV("createAudioPatch() success");
2531            } else {
2532                ALOGW("createAudioPatch() setInputDevice() failed to create a patch");
2533                return INVALID_OPERATION;
2534            }
2535        } else if (patch->sinks[0].type == AUDIO_PORT_TYPE_DEVICE) {
2536            // device to device connection
2537            if (patchDesc != 0) {
2538                if (patchDesc->mPatch.sources[0].id != patch->sources[0].id) {
2539                    return BAD_VALUE;
2540                }
2541            }
2542            sp<DeviceDescriptor> srcDeviceDesc =
2543                    mAvailableInputDevices.getDeviceFromId(patch->sources[0].id);
2544            if (srcDeviceDesc == 0) {
2545                return BAD_VALUE;
2546            }
2547
2548            //update source and sink with our own data as the data passed in the patch may
2549            // be incomplete.
2550            struct audio_patch newPatch = *patch;
2551            srcDeviceDesc->toAudioPortConfig(&newPatch.sources[0], &patch->sources[0]);
2552
2553            for (size_t i = 0; i < patch->num_sinks; i++) {
2554                if (patch->sinks[i].type != AUDIO_PORT_TYPE_DEVICE) {
2555                    ALOGV("createAudioPatch() source device but one sink is not a device");
2556                    return INVALID_OPERATION;
2557                }
2558
2559                sp<DeviceDescriptor> sinkDeviceDesc =
2560                        mAvailableOutputDevices.getDeviceFromId(patch->sinks[i].id);
2561                if (sinkDeviceDesc == 0) {
2562                    return BAD_VALUE;
2563                }
2564                sinkDeviceDesc->toAudioPortConfig(&newPatch.sinks[i], &patch->sinks[i]);
2565
2566                // create a software bridge in PatchPanel if:
2567                // - source and sink devices are on differnt HW modules OR
2568                // - audio HAL version is < 3.0
2569                if ((srcDeviceDesc->getModuleHandle() != sinkDeviceDesc->getModuleHandle()) ||
2570                        (srcDeviceDesc->mModule->getHalVersion() < AUDIO_DEVICE_API_VERSION_3_0)) {
2571                    // support only one sink device for now to simplify output selection logic
2572                    if (patch->num_sinks > 1) {
2573                        return INVALID_OPERATION;
2574                    }
2575                    SortedVector<audio_io_handle_t> outputs =
2576                                            getOutputsForDevice(sinkDeviceDesc->type(), mOutputs);
2577                    // if the sink device is reachable via an opened output stream, request to go via
2578                    // this output stream by adding a second source to the patch description
2579                    audio_io_handle_t output = selectOutput(outputs,
2580                                                            AUDIO_OUTPUT_FLAG_NONE,
2581                                                            AUDIO_FORMAT_INVALID);
2582                    if (output != AUDIO_IO_HANDLE_NONE) {
2583                        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
2584                        if (outputDesc->isDuplicated()) {
2585                            return INVALID_OPERATION;
2586                        }
2587                        outputDesc->toAudioPortConfig(&newPatch.sources[1], &patch->sources[0]);
2588                        newPatch.sources[1].ext.mix.usecase.stream = AUDIO_STREAM_PATCH;
2589                        newPatch.num_sources = 2;
2590                    }
2591                }
2592            }
2593            // TODO: check from routing capabilities in config file and other conflicting patches
2594
2595            audio_patch_handle_t afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
2596            if (index >= 0) {
2597                afPatchHandle = patchDesc->mAfPatchHandle;
2598            }
2599
2600            status_t status = mpClientInterface->createAudioPatch(&newPatch,
2601                                                                  &afPatchHandle,
2602                                                                  0);
2603            ALOGV("createAudioPatch() patch panel returned %d patchHandle %d",
2604                                                                  status, afPatchHandle);
2605            if (status == NO_ERROR) {
2606                if (index < 0) {
2607                    patchDesc = new AudioPatch(&newPatch, uid);
2608                    addAudioPatch(patchDesc->mHandle, patchDesc);
2609                } else {
2610                    patchDesc->mPatch = newPatch;
2611                }
2612                patchDesc->mAfPatchHandle = afPatchHandle;
2613                *handle = patchDesc->mHandle;
2614                nextAudioPortGeneration();
2615                mpClientInterface->onAudioPatchListUpdate();
2616            } else {
2617                ALOGW("createAudioPatch() patch panel could not connect device patch, error %d",
2618                status);
2619                return INVALID_OPERATION;
2620            }
2621        } else {
2622            return BAD_VALUE;
2623        }
2624    } else {
2625        return BAD_VALUE;
2626    }
2627    return NO_ERROR;
2628}
2629
2630status_t AudioPolicyManager::releaseAudioPatch(audio_patch_handle_t handle,
2631                                                  uid_t uid)
2632{
2633    ALOGV("releaseAudioPatch() patch %d", handle);
2634
2635    ssize_t index = mAudioPatches.indexOfKey(handle);
2636
2637    if (index < 0) {
2638        return BAD_VALUE;
2639    }
2640    sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
2641    ALOGV("releaseAudioPatch() mUidCached %d patchDesc->mUid %d uid %d",
2642          mUidCached, patchDesc->mUid, uid);
2643    if (patchDesc->mUid != mUidCached && uid != patchDesc->mUid) {
2644        return INVALID_OPERATION;
2645    }
2646
2647    struct audio_patch *patch = &patchDesc->mPatch;
2648    patchDesc->mUid = mUidCached;
2649    if (patch->sources[0].type == AUDIO_PORT_TYPE_MIX) {
2650        sp<SwAudioOutputDescriptor> outputDesc = mOutputs.getOutputFromId(patch->sources[0].id);
2651        if (outputDesc == NULL) {
2652            ALOGV("releaseAudioPatch() output not found for id %d", patch->sources[0].id);
2653            return BAD_VALUE;
2654        }
2655
2656        setOutputDevice(outputDesc,
2657                        getNewOutputDevice(outputDesc, true /*fromCache*/),
2658                       true,
2659                       0,
2660                       NULL);
2661    } else if (patch->sources[0].type == AUDIO_PORT_TYPE_DEVICE) {
2662        if (patch->sinks[0].type == AUDIO_PORT_TYPE_MIX) {
2663            sp<AudioInputDescriptor> inputDesc = mInputs.getInputFromId(patch->sinks[0].id);
2664            if (inputDesc == NULL) {
2665                ALOGV("releaseAudioPatch() input not found for id %d", patch->sinks[0].id);
2666                return BAD_VALUE;
2667            }
2668            setInputDevice(inputDesc->mIoHandle,
2669                           getNewInputDevice(inputDesc->mIoHandle),
2670                           true,
2671                           NULL);
2672        } else if (patch->sinks[0].type == AUDIO_PORT_TYPE_DEVICE) {
2673            audio_patch_handle_t afPatchHandle = patchDesc->mAfPatchHandle;
2674            status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, 0);
2675            ALOGV("releaseAudioPatch() patch panel returned %d patchHandle %d",
2676                                                              status, patchDesc->mAfPatchHandle);
2677            removeAudioPatch(patchDesc->mHandle);
2678            nextAudioPortGeneration();
2679            mpClientInterface->onAudioPatchListUpdate();
2680        } else {
2681            return BAD_VALUE;
2682        }
2683    } else {
2684        return BAD_VALUE;
2685    }
2686    return NO_ERROR;
2687}
2688
2689status_t AudioPolicyManager::listAudioPatches(unsigned int *num_patches,
2690                                              struct audio_patch *patches,
2691                                              unsigned int *generation)
2692{
2693    if (generation == NULL) {
2694        return BAD_VALUE;
2695    }
2696    *generation = curAudioPortGeneration();
2697    return mAudioPatches.listAudioPatches(num_patches, patches);
2698}
2699
2700status_t AudioPolicyManager::setAudioPortConfig(const struct audio_port_config *config)
2701{
2702    ALOGV("setAudioPortConfig()");
2703
2704    if (config == NULL) {
2705        return BAD_VALUE;
2706    }
2707    ALOGV("setAudioPortConfig() on port handle %d", config->id);
2708    // Only support gain configuration for now
2709    if (config->config_mask != AUDIO_PORT_CONFIG_GAIN) {
2710        return INVALID_OPERATION;
2711    }
2712
2713    sp<AudioPortConfig> audioPortConfig;
2714    if (config->type == AUDIO_PORT_TYPE_MIX) {
2715        if (config->role == AUDIO_PORT_ROLE_SOURCE) {
2716            sp<SwAudioOutputDescriptor> outputDesc = mOutputs.getOutputFromId(config->id);
2717            if (outputDesc == NULL) {
2718                return BAD_VALUE;
2719            }
2720            ALOG_ASSERT(!outputDesc->isDuplicated(),
2721                        "setAudioPortConfig() called on duplicated output %d",
2722                        outputDesc->mIoHandle);
2723            audioPortConfig = outputDesc;
2724        } else if (config->role == AUDIO_PORT_ROLE_SINK) {
2725            sp<AudioInputDescriptor> inputDesc = mInputs.getInputFromId(config->id);
2726            if (inputDesc == NULL) {
2727                return BAD_VALUE;
2728            }
2729            audioPortConfig = inputDesc;
2730        } else {
2731            return BAD_VALUE;
2732        }
2733    } else if (config->type == AUDIO_PORT_TYPE_DEVICE) {
2734        sp<DeviceDescriptor> deviceDesc;
2735        if (config->role == AUDIO_PORT_ROLE_SOURCE) {
2736            deviceDesc = mAvailableInputDevices.getDeviceFromId(config->id);
2737        } else if (config->role == AUDIO_PORT_ROLE_SINK) {
2738            deviceDesc = mAvailableOutputDevices.getDeviceFromId(config->id);
2739        } else {
2740            return BAD_VALUE;
2741        }
2742        if (deviceDesc == NULL) {
2743            return BAD_VALUE;
2744        }
2745        audioPortConfig = deviceDesc;
2746    } else {
2747        return BAD_VALUE;
2748    }
2749
2750    struct audio_port_config backupConfig;
2751    status_t status = audioPortConfig->applyAudioPortConfig(config, &backupConfig);
2752    if (status == NO_ERROR) {
2753        struct audio_port_config newConfig;
2754        audioPortConfig->toAudioPortConfig(&newConfig, config);
2755        status = mpClientInterface->setAudioPortConfig(&newConfig, 0);
2756    }
2757    if (status != NO_ERROR) {
2758        audioPortConfig->applyAudioPortConfig(&backupConfig);
2759    }
2760
2761    return status;
2762}
2763
2764void AudioPolicyManager::releaseResourcesForUid(uid_t uid)
2765{
2766    clearAudioSources(uid);
2767    clearAudioPatches(uid);
2768    clearSessionRoutes(uid);
2769}
2770
2771void AudioPolicyManager::clearAudioPatches(uid_t uid)
2772{
2773    for (ssize_t i = (ssize_t)mAudioPatches.size() - 1; i >= 0; i--)  {
2774        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(i);
2775        if (patchDesc->mUid == uid) {
2776            releaseAudioPatch(mAudioPatches.keyAt(i), uid);
2777        }
2778    }
2779}
2780
2781void AudioPolicyManager::checkStrategyRoute(routing_strategy strategy,
2782                                            audio_io_handle_t ouptutToSkip)
2783{
2784    audio_devices_t device = getDeviceForStrategy(strategy, false /*fromCache*/);
2785    SortedVector<audio_io_handle_t> outputs = getOutputsForDevice(device, mOutputs);
2786    for (size_t j = 0; j < mOutputs.size(); j++) {
2787        if (mOutputs.keyAt(j) == ouptutToSkip) {
2788            continue;
2789        }
2790        sp<SwAudioOutputDescriptor> outputDesc = mOutputs.valueAt(j);
2791        if (!isStrategyActive(outputDesc, (routing_strategy)strategy)) {
2792            continue;
2793        }
2794        // If the default device for this strategy is on another output mix,
2795        // invalidate all tracks in this strategy to force re connection.
2796        // Otherwise select new device on the output mix.
2797        if (outputs.indexOf(mOutputs.keyAt(j)) < 0) {
2798            for (int stream = 0; stream < AUDIO_STREAM_FOR_POLICY_CNT; stream++) {
2799                if (getStrategy((audio_stream_type_t)stream) == strategy) {
2800                    mpClientInterface->invalidateStream((audio_stream_type_t)stream);
2801                }
2802            }
2803        } else {
2804            audio_devices_t newDevice = getNewOutputDevice(outputDesc, false /*fromCache*/);
2805            setOutputDevice(outputDesc, newDevice, false);
2806        }
2807    }
2808}
2809
2810void AudioPolicyManager::clearSessionRoutes(uid_t uid)
2811{
2812    // remove output routes associated with this uid
2813    SortedVector<routing_strategy> affectedStrategies;
2814    for (ssize_t i = (ssize_t)mOutputRoutes.size() - 1; i >= 0; i--)  {
2815        sp<SessionRoute> route = mOutputRoutes.valueAt(i);
2816        if (route->mUid == uid) {
2817            mOutputRoutes.removeItemsAt(i);
2818            if (route->mDeviceDescriptor != 0) {
2819                affectedStrategies.add(getStrategy(route->mStreamType));
2820            }
2821        }
2822    }
2823    // reroute outputs if necessary
2824    for (size_t i = 0; i < affectedStrategies.size(); i++) {
2825        checkStrategyRoute(affectedStrategies[i], AUDIO_IO_HANDLE_NONE);
2826    }
2827
2828    // remove input routes associated with this uid
2829    SortedVector<audio_source_t> affectedSources;
2830    for (ssize_t i = (ssize_t)mInputRoutes.size() - 1; i >= 0; i--)  {
2831        sp<SessionRoute> route = mInputRoutes.valueAt(i);
2832        if (route->mUid == uid) {
2833            mInputRoutes.removeItemsAt(i);
2834            if (route->mDeviceDescriptor != 0) {
2835                affectedSources.add(route->mSource);
2836            }
2837        }
2838    }
2839    // reroute inputs if necessary
2840    SortedVector<audio_io_handle_t> inputsToClose;
2841    for (size_t i = 0; i < mInputs.size(); i++) {
2842        sp<AudioInputDescriptor> inputDesc = mInputs.valueAt(i);
2843        if (affectedSources.indexOf(inputDesc->inputSource()) >= 0) {
2844            inputsToClose.add(inputDesc->mIoHandle);
2845        }
2846    }
2847    for (size_t i = 0; i < inputsToClose.size(); i++) {
2848        closeInput(inputsToClose[i]);
2849    }
2850}
2851
2852void AudioPolicyManager::clearAudioSources(uid_t uid)
2853{
2854    for (ssize_t i = (ssize_t)mAudioSources.size() - 1; i >= 0; i--)  {
2855        sp<AudioSourceDescriptor> sourceDesc = mAudioSources.valueAt(i);
2856        if (sourceDesc->mUid == uid) {
2857            stopAudioSource(mAudioSources.keyAt(i));
2858        }
2859    }
2860}
2861
2862status_t AudioPolicyManager::acquireSoundTriggerSession(audio_session_t *session,
2863                                       audio_io_handle_t *ioHandle,
2864                                       audio_devices_t *device)
2865{
2866    *session = (audio_session_t)mpClientInterface->newAudioUniqueId(AUDIO_UNIQUE_ID_USE_SESSION);
2867    *ioHandle = (audio_io_handle_t)mpClientInterface->newAudioUniqueId(AUDIO_UNIQUE_ID_USE_INPUT);
2868    *device = getDeviceAndMixForInputSource(AUDIO_SOURCE_HOTWORD);
2869
2870    return mSoundTriggerSessions.acquireSession(*session, *ioHandle);
2871}
2872
2873status_t AudioPolicyManager::startAudioSource(const struct audio_port_config *source,
2874                                  const audio_attributes_t *attributes,
2875                                  audio_io_handle_t *handle,
2876                                  uid_t uid)
2877{
2878    ALOGV("%s source %p attributes %p handle %p", __FUNCTION__, source, attributes, handle);
2879    if (source == NULL || attributes == NULL || handle == NULL) {
2880        return BAD_VALUE;
2881    }
2882
2883    *handle = AUDIO_IO_HANDLE_NONE;
2884
2885    if (source->role != AUDIO_PORT_ROLE_SOURCE ||
2886            source->type != AUDIO_PORT_TYPE_DEVICE) {
2887        ALOGV("%s INVALID_OPERATION source->role %d source->type %d", __FUNCTION__, source->role, source->type);
2888        return INVALID_OPERATION;
2889    }
2890
2891    sp<DeviceDescriptor> srcDeviceDesc =
2892            mAvailableInputDevices.getDevice(source->ext.device.type,
2893                                              String8(source->ext.device.address));
2894    if (srcDeviceDesc == 0) {
2895        ALOGV("%s source->ext.device.type %08x not found", __FUNCTION__, source->ext.device.type);
2896        return BAD_VALUE;
2897    }
2898    sp<AudioSourceDescriptor> sourceDesc =
2899            new AudioSourceDescriptor(srcDeviceDesc, attributes, uid);
2900
2901    struct audio_patch dummyPatch;
2902    sp<AudioPatch> patchDesc = new AudioPatch(&dummyPatch, uid);
2903    sourceDesc->mPatchDesc = patchDesc;
2904
2905    status_t status = connectAudioSource(sourceDesc);
2906    if (status == NO_ERROR) {
2907        mAudioSources.add(sourceDesc->getHandle(), sourceDesc);
2908        *handle = sourceDesc->getHandle();
2909    }
2910    return status;
2911}
2912
2913status_t AudioPolicyManager::connectAudioSource(const sp<AudioSourceDescriptor>& sourceDesc)
2914{
2915    ALOGV("%s handle %d", __FUNCTION__, sourceDesc->getHandle());
2916
2917    // make sure we only have one patch per source.
2918    disconnectAudioSource(sourceDesc);
2919
2920    routing_strategy strategy = (routing_strategy) getStrategyForAttr(&sourceDesc->mAttributes);
2921    audio_stream_type_t stream = streamTypefromAttributesInt(&sourceDesc->mAttributes);
2922    sp<DeviceDescriptor> srcDeviceDesc = sourceDesc->mDevice;
2923
2924    audio_devices_t sinkDevice = getDeviceForStrategy(strategy, true);
2925    sp<DeviceDescriptor> sinkDeviceDesc =
2926            mAvailableOutputDevices.getDevice(sinkDevice, String8(""));
2927
2928    audio_patch_handle_t afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
2929    struct audio_patch *patch = &sourceDesc->mPatchDesc->mPatch;
2930
2931    if (srcDeviceDesc->getAudioPort()->mModule->getHandle() ==
2932            sinkDeviceDesc->getAudioPort()->mModule->getHandle() &&
2933            srcDeviceDesc->getAudioPort()->mModule->getHalVersion() >= AUDIO_DEVICE_API_VERSION_3_0 &&
2934            srcDeviceDesc->getAudioPort()->mGains.size() > 0) {
2935        ALOGV("%s AUDIO_DEVICE_API_VERSION_3_0", __FUNCTION__);
2936        //   create patch between src device and output device
2937        //   create Hwoutput and add to mHwOutputs
2938    } else {
2939        SortedVector<audio_io_handle_t> outputs = getOutputsForDevice(sinkDevice, mOutputs);
2940        audio_io_handle_t output =
2941                selectOutput(outputs, AUDIO_OUTPUT_FLAG_NONE, AUDIO_FORMAT_INVALID);
2942        if (output == AUDIO_IO_HANDLE_NONE) {
2943            ALOGV("%s no output for device %08x", __FUNCTION__, sinkDevice);
2944            return INVALID_OPERATION;
2945        }
2946        sp<SwAudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
2947        if (outputDesc->isDuplicated()) {
2948            ALOGV("%s output for device %08x is duplicated", __FUNCTION__, sinkDevice);
2949            return INVALID_OPERATION;
2950        }
2951        // create a special patch with no sink and two sources:
2952        // - the second source indicates to PatchPanel through which output mix this patch should
2953        // be connected as well as the stream type for volume control
2954        // - the sink is defined by whatever output device is currently selected for the output
2955        // though which this patch is routed.
2956        patch->num_sinks = 0;
2957        patch->num_sources = 2;
2958        srcDeviceDesc->toAudioPortConfig(&patch->sources[0], NULL);
2959        outputDesc->toAudioPortConfig(&patch->sources[1], NULL);
2960        patch->sources[1].ext.mix.usecase.stream = stream;
2961        status_t status = mpClientInterface->createAudioPatch(patch,
2962                                                              &afPatchHandle,
2963                                                              0);
2964        ALOGV("%s patch panel returned %d patchHandle %d", __FUNCTION__,
2965                                                              status, afPatchHandle);
2966        if (status != NO_ERROR) {
2967            ALOGW("%s patch panel could not connect device patch, error %d",
2968                  __FUNCTION__, status);
2969            return INVALID_OPERATION;
2970        }
2971        uint32_t delayMs = 0;
2972        status = startSource(outputDesc, stream, sinkDevice, &delayMs);
2973
2974        if (status != NO_ERROR) {
2975            mpClientInterface->releaseAudioPatch(sourceDesc->mPatchDesc->mAfPatchHandle, 0);
2976            return status;
2977        }
2978        sourceDesc->mSwOutput = outputDesc;
2979        if (delayMs != 0) {
2980            usleep(delayMs * 1000);
2981        }
2982    }
2983
2984    sourceDesc->mPatchDesc->mAfPatchHandle = afPatchHandle;
2985    addAudioPatch(sourceDesc->mPatchDesc->mHandle, sourceDesc->mPatchDesc);
2986
2987    return NO_ERROR;
2988}
2989
2990status_t AudioPolicyManager::stopAudioSource(audio_io_handle_t handle __unused)
2991{
2992    sp<AudioSourceDescriptor> sourceDesc = mAudioSources.valueFor(handle);
2993    ALOGV("%s handle %d", __FUNCTION__, handle);
2994    if (sourceDesc == 0) {
2995        ALOGW("%s unknown source for handle %d", __FUNCTION__, handle);
2996        return BAD_VALUE;
2997    }
2998    status_t status = disconnectAudioSource(sourceDesc);
2999
3000    mAudioSources.removeItem(handle);
3001    return status;
3002}
3003
3004status_t AudioPolicyManager::setMasterMono(bool mono)
3005{
3006    if (mMasterMono == mono) {
3007        return NO_ERROR;
3008    }
3009    mMasterMono = mono;
3010    // if enabling mono we close all offloaded devices, which will invalidate the
3011    // corresponding AudioTrack. The AudioTrack client/MediaPlayer is responsible
3012    // for recreating the new AudioTrack as non-offloaded PCM.
3013    //
3014    // If disabling mono, we leave all tracks as is: we don't know which clients
3015    // and tracks are able to be recreated as offloaded. The next "song" should
3016    // play back offloaded.
3017    if (mMasterMono) {
3018        Vector<audio_io_handle_t> offloaded;
3019        for (size_t i = 0; i < mOutputs.size(); ++i) {
3020            sp<SwAudioOutputDescriptor> desc = mOutputs.valueAt(i);
3021            if (desc->mFlags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) {
3022                offloaded.push(desc->mIoHandle);
3023            }
3024        }
3025        for (size_t i = 0; i < offloaded.size(); ++i) {
3026            closeOutput(offloaded[i]);
3027        }
3028    }
3029    // update master mono for all remaining outputs
3030    for (size_t i = 0; i < mOutputs.size(); ++i) {
3031        updateMono(mOutputs.keyAt(i));
3032    }
3033    return NO_ERROR;
3034}
3035
3036status_t AudioPolicyManager::getMasterMono(bool *mono)
3037{
3038    *mono = mMasterMono;
3039    return NO_ERROR;
3040}
3041
3042status_t AudioPolicyManager::disconnectAudioSource(const sp<AudioSourceDescriptor>& sourceDesc)
3043{
3044    ALOGV("%s handle %d", __FUNCTION__, sourceDesc->getHandle());
3045
3046    sp<AudioPatch> patchDesc = mAudioPatches.valueFor(sourceDesc->mPatchDesc->mHandle);
3047    if (patchDesc == 0) {
3048        ALOGW("%s source has no patch with handle %d", __FUNCTION__,
3049              sourceDesc->mPatchDesc->mHandle);
3050        return BAD_VALUE;
3051    }
3052    removeAudioPatch(sourceDesc->mPatchDesc->mHandle);
3053
3054    audio_stream_type_t stream = streamTypefromAttributesInt(&sourceDesc->mAttributes);
3055    sp<SwAudioOutputDescriptor> swOutputDesc = sourceDesc->mSwOutput.promote();
3056    if (swOutputDesc != 0) {
3057        stopSource(swOutputDesc, stream, false);
3058        mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, 0);
3059    } else {
3060        sp<HwAudioOutputDescriptor> hwOutputDesc = sourceDesc->mHwOutput.promote();
3061        if (hwOutputDesc != 0) {
3062          //   release patch between src device and output device
3063          //   close Hwoutput and remove from mHwOutputs
3064        } else {
3065            ALOGW("%s source has neither SW nor HW output", __FUNCTION__);
3066        }
3067    }
3068    return NO_ERROR;
3069}
3070
3071sp<AudioSourceDescriptor> AudioPolicyManager::getSourceForStrategyOnOutput(
3072        audio_io_handle_t output, routing_strategy strategy)
3073{
3074    sp<AudioSourceDescriptor> source;
3075    for (size_t i = 0; i < mAudioSources.size(); i++)  {
3076        sp<AudioSourceDescriptor> sourceDesc = mAudioSources.valueAt(i);
3077        routing_strategy sourceStrategy =
3078                (routing_strategy) getStrategyForAttr(&sourceDesc->mAttributes);
3079        sp<SwAudioOutputDescriptor> outputDesc = sourceDesc->mSwOutput.promote();
3080        if (sourceStrategy == strategy && outputDesc != 0 && outputDesc->mIoHandle == output) {
3081            source = sourceDesc;
3082            break;
3083        }
3084    }
3085    return source;
3086}
3087
3088// ----------------------------------------------------------------------------
3089// AudioPolicyManager
3090// ----------------------------------------------------------------------------
3091uint32_t AudioPolicyManager::nextAudioPortGeneration()
3092{
3093    return android_atomic_inc(&mAudioPortGeneration);
3094}
3095
3096AudioPolicyManager::AudioPolicyManager(AudioPolicyClientInterface *clientInterface)
3097    :
3098#ifdef AUDIO_POLICY_TEST
3099    Thread(false),
3100#endif //AUDIO_POLICY_TEST
3101    mLimitRingtoneVolume(false), mLastVoiceVolume(-1.0f),
3102    mA2dpSuspended(false),
3103    mAudioPortGeneration(1),
3104    mBeaconMuteRefCount(0),
3105    mBeaconPlayingRefCount(0),
3106    mBeaconMuted(false),
3107    mTtsOutputAvailable(false),
3108    mMasterMono(false)
3109{
3110    mUidCached = getuid();
3111    mpClientInterface = clientInterface;
3112
3113    // TODO: remove when legacy conf file is removed. true on devices that use DRC on the
3114    // DEVICE_CATEGORY_SPEAKER path to boost soft sounds, used to adjust volume curves accordingly.
3115    // Note: remove also speaker_drc_enabled from global configuration of XML config file.
3116    bool speakerDrcEnabled = false;
3117
3118#ifdef USE_XML_AUDIO_POLICY_CONF
3119    mVolumeCurves = new VolumeCurvesCollection();
3120    AudioPolicyConfig config(mHwModules, mAvailableOutputDevices, mAvailableInputDevices,
3121                             mDefaultOutputDevice, speakerDrcEnabled,
3122                             static_cast<VolumeCurvesCollection *>(mVolumeCurves));
3123    PolicySerializer serializer;
3124    if (serializer.deserialize(AUDIO_POLICY_XML_CONFIG_FILE, config) != NO_ERROR) {
3125#else
3126    mVolumeCurves = new StreamDescriptorCollection();
3127    AudioPolicyConfig config(mHwModules, mAvailableOutputDevices, mAvailableInputDevices,
3128                             mDefaultOutputDevice, speakerDrcEnabled);
3129    if ((ConfigParsingUtils::loadConfig(AUDIO_POLICY_VENDOR_CONFIG_FILE, config) != NO_ERROR) &&
3130            (ConfigParsingUtils::loadConfig(AUDIO_POLICY_CONFIG_FILE, config) != NO_ERROR)) {
3131#endif
3132        ALOGE("could not load audio policy configuration file, setting defaults");
3133        config.setDefault();
3134    }
3135    // must be done after reading the policy (since conditionned by Speaker Drc Enabling)
3136    mVolumeCurves->initializeVolumeCurves(speakerDrcEnabled);
3137
3138    // Once policy config has been parsed, retrieve an instance of the engine and initialize it.
3139    audio_policy::EngineInstance *engineInstance = audio_policy::EngineInstance::getInstance();
3140    if (!engineInstance) {
3141        ALOGE("%s:  Could not get an instance of policy engine", __FUNCTION__);
3142        return;
3143    }
3144    // Retrieve the Policy Manager Interface
3145    mEngine = engineInstance->queryInterface<AudioPolicyManagerInterface>();
3146    if (mEngine == NULL) {
3147        ALOGE("%s: Failed to get Policy Engine Interface", __FUNCTION__);
3148        return;
3149    }
3150    mEngine->setObserver(this);
3151    status_t status = mEngine->initCheck();
3152    ALOG_ASSERT(status == NO_ERROR, "Policy engine not initialized(err=%d)", status);
3153
3154    // mAvailableOutputDevices and mAvailableInputDevices now contain all attached devices
3155    // open all output streams needed to access attached devices
3156    audio_devices_t outputDeviceTypes = mAvailableOutputDevices.types();
3157    audio_devices_t inputDeviceTypes = mAvailableInputDevices.types() & ~AUDIO_DEVICE_BIT_IN;
3158    for (size_t i = 0; i < mHwModules.size(); i++) {
3159        mHwModules[i]->mHandle = mpClientInterface->loadHwModule(mHwModules[i]->getName());
3160        if (mHwModules[i]->mHandle == 0) {
3161            ALOGW("could not open HW module %s", mHwModules[i]->getName());
3162            continue;
3163        }
3164        // open all output streams needed to access attached devices
3165        // except for direct output streams that are only opened when they are actually
3166        // required by an app.
3167        // This also validates mAvailableOutputDevices list
3168        for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
3169        {
3170            const sp<IOProfile> outProfile = mHwModules[i]->mOutputProfiles[j];
3171
3172            if (!outProfile->hasSupportedDevices()) {
3173                ALOGW("Output profile contains no device on module %s", mHwModules[i]->getName());
3174                continue;
3175            }
3176            if ((outProfile->getFlags() & AUDIO_OUTPUT_FLAG_TTS) != 0) {
3177                mTtsOutputAvailable = true;
3178            }
3179
3180            if ((outProfile->getFlags() & AUDIO_OUTPUT_FLAG_DIRECT) != 0) {
3181                continue;
3182            }
3183            audio_devices_t profileType = outProfile->getSupportedDevicesType();
3184            if ((profileType & mDefaultOutputDevice->type()) != AUDIO_DEVICE_NONE) {
3185                profileType = mDefaultOutputDevice->type();
3186            } else {
3187                // chose first device present in profile's SupportedDevices also part of
3188                // outputDeviceTypes
3189                profileType = outProfile->getSupportedDeviceForType(outputDeviceTypes);
3190            }
3191            if ((profileType & outputDeviceTypes) == 0) {
3192                continue;
3193            }
3194            sp<SwAudioOutputDescriptor> outputDesc = new SwAudioOutputDescriptor(outProfile,
3195                                                                                 mpClientInterface);
3196
3197            outputDesc->mDevice = profileType;
3198            audio_config_t config = AUDIO_CONFIG_INITIALIZER;
3199            config.sample_rate = outputDesc->mSamplingRate;
3200            config.channel_mask = outputDesc->mChannelMask;
3201            config.format = outputDesc->mFormat;
3202            audio_io_handle_t output = AUDIO_IO_HANDLE_NONE;
3203            status_t status = mpClientInterface->openOutput(outProfile->getModuleHandle(),
3204                                                            &output,
3205                                                            &config,
3206                                                            &outputDesc->mDevice,
3207                                                            String8(""),
3208                                                            &outputDesc->mLatency,
3209                                                            outputDesc->mFlags);
3210
3211            if (status != NO_ERROR) {
3212                ALOGW("Cannot open output stream for device %08x on hw module %s",
3213                      outputDesc->mDevice,
3214                      mHwModules[i]->getName());
3215            } else {
3216                outputDesc->mSamplingRate = config.sample_rate;
3217                outputDesc->mChannelMask = config.channel_mask;
3218                outputDesc->mFormat = config.format;
3219
3220                const DeviceVector &supportedDevices = outProfile->getSupportedDevices();
3221                for (size_t k = 0; k  < supportedDevices.size(); k++) {
3222                    ssize_t index = mAvailableOutputDevices.indexOf(supportedDevices[k]);
3223                    // give a valid ID to an attached device once confirmed it is reachable
3224                    if (index >= 0 && !mAvailableOutputDevices[index]->isAttached()) {
3225                        mAvailableOutputDevices[index]->attach(mHwModules[i]);
3226                    }
3227                }
3228                if (mPrimaryOutput == 0 &&
3229                        outProfile->getFlags() & AUDIO_OUTPUT_FLAG_PRIMARY) {
3230                    mPrimaryOutput = outputDesc;
3231                }
3232                addOutput(output, outputDesc);
3233                setOutputDevice(outputDesc,
3234                                outputDesc->mDevice,
3235                                true);
3236            }
3237        }
3238        // open input streams needed to access attached devices to validate
3239        // mAvailableInputDevices list
3240        for (size_t j = 0; j < mHwModules[i]->mInputProfiles.size(); j++)
3241        {
3242            const sp<IOProfile> inProfile = mHwModules[i]->mInputProfiles[j];
3243
3244            if (!inProfile->hasSupportedDevices()) {
3245                ALOGW("Input profile contains no device on module %s", mHwModules[i]->getName());
3246                continue;
3247            }
3248            // chose first device present in profile's SupportedDevices also part of
3249            // inputDeviceTypes
3250            audio_devices_t profileType = inProfile->getSupportedDeviceForType(inputDeviceTypes);
3251
3252            if ((profileType & inputDeviceTypes) == 0) {
3253                continue;
3254            }
3255            sp<AudioInputDescriptor> inputDesc =
3256                    new AudioInputDescriptor(inProfile);
3257
3258            inputDesc->mDevice = profileType;
3259
3260            // find the address
3261            DeviceVector inputDevices = mAvailableInputDevices.getDevicesFromType(profileType);
3262            //   the inputs vector must be of size 1, but we don't want to crash here
3263            String8 address = inputDevices.size() > 0 ? inputDevices.itemAt(0)->mAddress
3264                    : String8("");
3265            ALOGV("  for input device 0x%x using address %s", profileType, address.string());
3266            ALOGE_IF(inputDevices.size() == 0, "Input device list is empty!");
3267
3268            audio_config_t config = AUDIO_CONFIG_INITIALIZER;
3269            config.sample_rate = inputDesc->mSamplingRate;
3270            config.channel_mask = inputDesc->mChannelMask;
3271            config.format = inputDesc->mFormat;
3272            audio_io_handle_t input = AUDIO_IO_HANDLE_NONE;
3273            status_t status = mpClientInterface->openInput(inProfile->getModuleHandle(),
3274                                                           &input,
3275                                                           &config,
3276                                                           &inputDesc->mDevice,
3277                                                           address,
3278                                                           AUDIO_SOURCE_MIC,
3279                                                           AUDIO_INPUT_FLAG_NONE);
3280
3281            if (status == NO_ERROR) {
3282                const DeviceVector &supportedDevices = inProfile->getSupportedDevices();
3283                for (size_t k = 0; k  < supportedDevices.size(); k++) {
3284                    ssize_t index =  mAvailableInputDevices.indexOf(supportedDevices[k]);
3285                    // give a valid ID to an attached device once confirmed it is reachable
3286                    if (index >= 0) {
3287                        sp<DeviceDescriptor> devDesc = mAvailableInputDevices[index];
3288                        if (!devDesc->isAttached()) {
3289                            devDesc->attach(mHwModules[i]);
3290                            devDesc->importAudioPort(inProfile);
3291                        }
3292                    }
3293                }
3294                mpClientInterface->closeInput(input);
3295            } else {
3296                ALOGW("Cannot open input stream for device %08x on hw module %s",
3297                      inputDesc->mDevice,
3298                      mHwModules[i]->getName());
3299            }
3300        }
3301    }
3302    // make sure all attached devices have been allocated a unique ID
3303    for (size_t i = 0; i  < mAvailableOutputDevices.size();) {
3304        if (!mAvailableOutputDevices[i]->isAttached()) {
3305            ALOGW("Output device %08x unreachable", mAvailableOutputDevices[i]->type());
3306            mAvailableOutputDevices.remove(mAvailableOutputDevices[i]);
3307            continue;
3308        }
3309        // The device is now validated and can be appended to the available devices of the engine
3310        mEngine->setDeviceConnectionState(mAvailableOutputDevices[i],
3311                                          AUDIO_POLICY_DEVICE_STATE_AVAILABLE);
3312        i++;
3313    }
3314    for (size_t i = 0; i  < mAvailableInputDevices.size();) {
3315        if (!mAvailableInputDevices[i]->isAttached()) {
3316            ALOGW("Input device %08x unreachable", mAvailableInputDevices[i]->type());
3317            mAvailableInputDevices.remove(mAvailableInputDevices[i]);
3318            continue;
3319        }
3320        // The device is now validated and can be appended to the available devices of the engine
3321        mEngine->setDeviceConnectionState(mAvailableInputDevices[i],
3322                                          AUDIO_POLICY_DEVICE_STATE_AVAILABLE);
3323        i++;
3324    }
3325    // make sure default device is reachable
3326    if (mDefaultOutputDevice == 0 || mAvailableOutputDevices.indexOf(mDefaultOutputDevice) < 0) {
3327        ALOGE("Default device %08x is unreachable", mDefaultOutputDevice->type());
3328    }
3329
3330    ALOGE_IF((mPrimaryOutput == 0), "Failed to open primary output");
3331
3332    updateDevicesAndOutputs();
3333
3334#ifdef AUDIO_POLICY_TEST
3335    if (mPrimaryOutput != 0) {
3336        AudioParameter outputCmd = AudioParameter();
3337        outputCmd.addInt(String8("set_id"), 0);
3338        mpClientInterface->setParameters(mPrimaryOutput->mIoHandle, outputCmd.toString());
3339
3340        mTestDevice = AUDIO_DEVICE_OUT_SPEAKER;
3341        mTestSamplingRate = 44100;
3342        mTestFormat = AUDIO_FORMAT_PCM_16_BIT;
3343        mTestChannels =  AUDIO_CHANNEL_OUT_STEREO;
3344        mTestLatencyMs = 0;
3345        mCurOutput = 0;
3346        mDirectOutput = false;
3347        for (int i = 0; i < NUM_TEST_OUTPUTS; i++) {
3348            mTestOutputs[i] = 0;
3349        }
3350
3351        const size_t SIZE = 256;
3352        char buffer[SIZE];
3353        snprintf(buffer, SIZE, "AudioPolicyManagerTest");
3354        run(buffer, ANDROID_PRIORITY_AUDIO);
3355    }
3356#endif //AUDIO_POLICY_TEST
3357}
3358
3359AudioPolicyManager::~AudioPolicyManager()
3360{
3361#ifdef AUDIO_POLICY_TEST
3362    exit();
3363#endif //AUDIO_POLICY_TEST
3364   for (size_t i = 0; i < mOutputs.size(); i++) {
3365        mpClientInterface->closeOutput(mOutputs.keyAt(i));
3366   }
3367   for (size_t i = 0; i < mInputs.size(); i++) {
3368        mpClientInterface->closeInput(mInputs.keyAt(i));
3369   }
3370   mAvailableOutputDevices.clear();
3371   mAvailableInputDevices.clear();
3372   mOutputs.clear();
3373   mInputs.clear();
3374   mHwModules.clear();
3375}
3376
3377status_t AudioPolicyManager::initCheck()
3378{
3379    return hasPrimaryOutput() ? NO_ERROR : NO_INIT;
3380}
3381
3382#ifdef AUDIO_POLICY_TEST
3383bool AudioPolicyManager::threadLoop()
3384{
3385    ALOGV("entering threadLoop()");
3386    while (!exitPending())
3387    {
3388        String8 command;
3389        int valueInt;
3390        String8 value;
3391
3392        Mutex::Autolock _l(mLock);
3393        mWaitWorkCV.waitRelative(mLock, milliseconds(50));
3394
3395        command = mpClientInterface->getParameters(0, String8("test_cmd_policy"));
3396        AudioParameter param = AudioParameter(command);
3397
3398        if (param.getInt(String8("test_cmd_policy"), valueInt) == NO_ERROR &&
3399            valueInt != 0) {
3400            ALOGV("Test command %s received", command.string());
3401            String8 target;
3402            if (param.get(String8("target"), target) != NO_ERROR) {
3403                target = "Manager";
3404            }
3405            if (param.getInt(String8("test_cmd_policy_output"), valueInt) == NO_ERROR) {
3406                param.remove(String8("test_cmd_policy_output"));
3407                mCurOutput = valueInt;
3408            }
3409            if (param.get(String8("test_cmd_policy_direct"), value) == NO_ERROR) {
3410                param.remove(String8("test_cmd_policy_direct"));
3411                if (value == "false") {
3412                    mDirectOutput = false;
3413                } else if (value == "true") {
3414                    mDirectOutput = true;
3415                }
3416            }
3417            if (param.getInt(String8("test_cmd_policy_input"), valueInt) == NO_ERROR) {
3418                param.remove(String8("test_cmd_policy_input"));
3419                mTestInput = valueInt;
3420            }
3421
3422            if (param.get(String8("test_cmd_policy_format"), value) == NO_ERROR) {
3423                param.remove(String8("test_cmd_policy_format"));
3424                int format = AUDIO_FORMAT_INVALID;
3425                if (value == "PCM 16 bits") {
3426                    format = AUDIO_FORMAT_PCM_16_BIT;
3427                } else if (value == "PCM 8 bits") {
3428                    format = AUDIO_FORMAT_PCM_8_BIT;
3429                } else if (value == "Compressed MP3") {
3430                    format = AUDIO_FORMAT_MP3;
3431                }
3432                if (format != AUDIO_FORMAT_INVALID) {
3433                    if (target == "Manager") {
3434                        mTestFormat = format;
3435                    } else if (mTestOutputs[mCurOutput] != 0) {
3436                        AudioParameter outputParam = AudioParameter();
3437                        outputParam.addInt(String8("format"), format);
3438                        mpClientInterface->setParameters(mTestOutputs[mCurOutput], outputParam.toString());
3439                    }
3440                }
3441            }
3442            if (param.get(String8("test_cmd_policy_channels"), value) == NO_ERROR) {
3443                param.remove(String8("test_cmd_policy_channels"));
3444                int channels = 0;
3445
3446                if (value == "Channels Stereo") {
3447                    channels =  AUDIO_CHANNEL_OUT_STEREO;
3448                } else if (value == "Channels Mono") {
3449                    channels =  AUDIO_CHANNEL_OUT_MONO;
3450                }
3451                if (channels != 0) {
3452                    if (target == "Manager") {
3453                        mTestChannels = channels;
3454                    } else if (mTestOutputs[mCurOutput] != 0) {
3455                        AudioParameter outputParam = AudioParameter();
3456                        outputParam.addInt(String8("channels"), channels);
3457                        mpClientInterface->setParameters(mTestOutputs[mCurOutput], outputParam.toString());
3458                    }
3459                }
3460            }
3461            if (param.getInt(String8("test_cmd_policy_sampleRate"), valueInt) == NO_ERROR) {
3462                param.remove(String8("test_cmd_policy_sampleRate"));
3463                if (valueInt >= 0 && valueInt <= 96000) {
3464                    int samplingRate = valueInt;
3465                    if (target == "Manager") {
3466                        mTestSamplingRate = samplingRate;
3467                    } else if (mTestOutputs[mCurOutput] != 0) {
3468                        AudioParameter outputParam = AudioParameter();
3469                        outputParam.addInt(String8("sampling_rate"), samplingRate);
3470                        mpClientInterface->setParameters(mTestOutputs[mCurOutput], outputParam.toString());
3471                    }
3472                }
3473            }
3474
3475            if (param.get(String8("test_cmd_policy_reopen"), value) == NO_ERROR) {
3476                param.remove(String8("test_cmd_policy_reopen"));
3477
3478                mpClientInterface->closeOutput(mpClientInterface->closeOutput(mPrimaryOutput););
3479
3480                audio_module_handle_t moduleHandle = mPrimaryOutput->getModuleHandle();
3481
3482                removeOutput(mPrimaryOutput->mIoHandle);
3483                sp<SwAudioOutputDescriptor> outputDesc = new AudioOutputDescriptor(NULL,
3484                                                                               mpClientInterface);
3485                outputDesc->mDevice = AUDIO_DEVICE_OUT_SPEAKER;
3486                audio_config_t config = AUDIO_CONFIG_INITIALIZER;
3487                config.sample_rate = outputDesc->mSamplingRate;
3488                config.channel_mask = outputDesc->mChannelMask;
3489                config.format = outputDesc->mFormat;
3490                audio_io_handle_t handle;
3491                status_t status = mpClientInterface->openOutput(moduleHandle,
3492                                                                &handle,
3493                                                                &config,
3494                                                                &outputDesc->mDevice,
3495                                                                String8(""),
3496                                                                &outputDesc->mLatency,
3497                                                                outputDesc->mFlags);
3498                if (status != NO_ERROR) {
3499                    ALOGE("Failed to reopen hardware output stream, "
3500                        "samplingRate: %d, format %d, channels %d",
3501                        outputDesc->mSamplingRate, outputDesc->mFormat, outputDesc->mChannelMask);
3502                } else {
3503                    outputDesc->mSamplingRate = config.sample_rate;
3504                    outputDesc->mChannelMask = config.channel_mask;
3505                    outputDesc->mFormat = config.format;
3506                    mPrimaryOutput = outputDesc;
3507                    AudioParameter outputCmd = AudioParameter();
3508                    outputCmd.addInt(String8("set_id"), 0);
3509                    mpClientInterface->setParameters(handle, outputCmd.toString());
3510                    addOutput(handle, outputDesc);
3511                }
3512            }
3513
3514
3515            mpClientInterface->setParameters(0, String8("test_cmd_policy="));
3516        }
3517    }
3518    return false;
3519}
3520
3521void AudioPolicyManager::exit()
3522{
3523    {
3524        AutoMutex _l(mLock);
3525        requestExit();
3526        mWaitWorkCV.signal();
3527    }
3528    requestExitAndWait();
3529}
3530
3531int AudioPolicyManager::testOutputIndex(audio_io_handle_t output)
3532{
3533    for (int i = 0; i < NUM_TEST_OUTPUTS; i++) {
3534        if (output == mTestOutputs[i]) return i;
3535    }
3536    return 0;
3537}
3538#endif //AUDIO_POLICY_TEST
3539
3540// ---
3541
3542void AudioPolicyManager::addOutput(audio_io_handle_t output, sp<SwAudioOutputDescriptor> outputDesc)
3543{
3544    outputDesc->setIoHandle(output);
3545    mOutputs.add(output, outputDesc);
3546    updateMono(output); // update mono status when adding to output list
3547    nextAudioPortGeneration();
3548}
3549
3550void AudioPolicyManager::removeOutput(audio_io_handle_t output)
3551{
3552    mOutputs.removeItem(output);
3553}
3554
3555void AudioPolicyManager::addInput(audio_io_handle_t input, sp<AudioInputDescriptor> inputDesc)
3556{
3557    inputDesc->setIoHandle(input);
3558    mInputs.add(input, inputDesc);
3559    nextAudioPortGeneration();
3560}
3561
3562void AudioPolicyManager::findIoHandlesByAddress(sp<SwAudioOutputDescriptor> desc /*in*/,
3563        const audio_devices_t device /*in*/,
3564        const String8 address /*in*/,
3565        SortedVector<audio_io_handle_t>& outputs /*out*/) {
3566    sp<DeviceDescriptor> devDesc =
3567        desc->mProfile->getSupportedDeviceByAddress(device, address);
3568    if (devDesc != 0) {
3569        ALOGV("findIoHandlesByAddress(): adding opened output %d on same address %s",
3570              desc->mIoHandle, address.string());
3571        outputs.add(desc->mIoHandle);
3572    }
3573}
3574
3575status_t AudioPolicyManager::checkOutputsForDevice(const sp<DeviceDescriptor> devDesc,
3576                                                   audio_policy_dev_state_t state,
3577                                                   SortedVector<audio_io_handle_t>& outputs,
3578                                                   const String8 address)
3579{
3580    audio_devices_t device = devDesc->type();
3581    sp<SwAudioOutputDescriptor> desc;
3582
3583    if (audio_device_is_digital(device)) {
3584        // erase all current sample rates, formats and channel masks
3585        devDesc->clearAudioProfiles();
3586    }
3587
3588    if (state == AUDIO_POLICY_DEVICE_STATE_AVAILABLE) {
3589        // first list already open outputs that can be routed to this device
3590        for (size_t i = 0; i < mOutputs.size(); i++) {
3591            desc = mOutputs.valueAt(i);
3592            if (!desc->isDuplicated() && (desc->supportedDevices() & device)) {
3593                if (!device_distinguishes_on_address(device)) {
3594                    ALOGV("checkOutputsForDevice(): adding opened output %d", mOutputs.keyAt(i));
3595                    outputs.add(mOutputs.keyAt(i));
3596                } else {
3597                    ALOGV("  checking address match due to device 0x%x", device);
3598                    findIoHandlesByAddress(desc, device, address, outputs);
3599                }
3600            }
3601        }
3602        // then look for output profiles that can be routed to this device
3603        SortedVector< sp<IOProfile> > profiles;
3604        for (size_t i = 0; i < mHwModules.size(); i++)
3605        {
3606            if (mHwModules[i]->mHandle == 0) {
3607                continue;
3608            }
3609            for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
3610            {
3611                sp<IOProfile> profile = mHwModules[i]->mOutputProfiles[j];
3612                if (profile->supportDevice(device)) {
3613                    if (!device_distinguishes_on_address(device) ||
3614                            profile->supportDeviceAddress(address)) {
3615                        profiles.add(profile);
3616                        ALOGV("checkOutputsForDevice(): adding profile %zu from module %zu", j, i);
3617                    }
3618                }
3619            }
3620        }
3621
3622        ALOGV("  found %zu profiles, %zu outputs", profiles.size(), outputs.size());
3623
3624        if (profiles.isEmpty() && outputs.isEmpty()) {
3625            ALOGW("checkOutputsForDevice(): No output available for device %04x", device);
3626            return BAD_VALUE;
3627        }
3628
3629        // open outputs for matching profiles if needed. Direct outputs are also opened to
3630        // query for dynamic parameters and will be closed later by setDeviceConnectionState()
3631        for (ssize_t profile_index = 0; profile_index < (ssize_t)profiles.size(); profile_index++) {
3632            sp<IOProfile> profile = profiles[profile_index];
3633
3634            // nothing to do if one output is already opened for this profile
3635            size_t j;
3636            for (j = 0; j < outputs.size(); j++) {
3637                desc = mOutputs.valueFor(outputs.itemAt(j));
3638                if (!desc->isDuplicated() && desc->mProfile == profile) {
3639                    // matching profile: save the sample rates, format and channel masks supported
3640                    // by the profile in our device descriptor
3641                    if (audio_device_is_digital(device)) {
3642                        devDesc->importAudioPort(profile);
3643                    }
3644                    break;
3645                }
3646            }
3647            if (j != outputs.size()) {
3648                continue;
3649            }
3650
3651            ALOGV("opening output for device %08x with params %s profile %p",
3652                                                      device, address.string(), profile.get());
3653            desc = new SwAudioOutputDescriptor(profile, mpClientInterface);
3654            desc->mDevice = device;
3655            audio_config_t config = AUDIO_CONFIG_INITIALIZER;
3656            config.sample_rate = desc->mSamplingRate;
3657            config.channel_mask = desc->mChannelMask;
3658            config.format = desc->mFormat;
3659            config.offload_info.sample_rate = desc->mSamplingRate;
3660            config.offload_info.channel_mask = desc->mChannelMask;
3661            config.offload_info.format = desc->mFormat;
3662            audio_io_handle_t output = AUDIO_IO_HANDLE_NONE;
3663            status_t status = mpClientInterface->openOutput(profile->getModuleHandle(),
3664                                                            &output,
3665                                                            &config,
3666                                                            &desc->mDevice,
3667                                                            address,
3668                                                            &desc->mLatency,
3669                                                            desc->mFlags);
3670            if (status == NO_ERROR) {
3671                desc->mSamplingRate = config.sample_rate;
3672                desc->mChannelMask = config.channel_mask;
3673                desc->mFormat = config.format;
3674
3675                // Here is where the out_set_parameters() for card & device gets called
3676                if (!address.isEmpty()) {
3677                    char *param = audio_device_address_to_parameter(device, address);
3678                    mpClientInterface->setParameters(output, String8(param));
3679                    free(param);
3680                }
3681                updateAudioProfiles(output, profile->getAudioProfiles());
3682                if (!profile->hasValidAudioProfile()) {
3683                    ALOGW("checkOutputsForDevice() missing param");
3684                    mpClientInterface->closeOutput(output);
3685                    output = AUDIO_IO_HANDLE_NONE;
3686                } else if (profile->hasDynamicAudioProfile()) {
3687                    mpClientInterface->closeOutput(output);
3688                    output = AUDIO_IO_HANDLE_NONE;
3689                    profile->pickAudioProfile(config.sample_rate, config.channel_mask, config.format);
3690                    config.offload_info.sample_rate = config.sample_rate;
3691                    config.offload_info.channel_mask = config.channel_mask;
3692                    config.offload_info.format = config.format;
3693                    status = mpClientInterface->openOutput(profile->getModuleHandle(),
3694                                                           &output,
3695                                                           &config,
3696                                                           &desc->mDevice,
3697                                                           address,
3698                                                           &desc->mLatency,
3699                                                           desc->mFlags);
3700                    if (status == NO_ERROR) {
3701                        desc->mSamplingRate = config.sample_rate;
3702                        desc->mChannelMask = config.channel_mask;
3703                        desc->mFormat = config.format;
3704                    } else {
3705                        output = AUDIO_IO_HANDLE_NONE;
3706                    }
3707                }
3708
3709                if (output != AUDIO_IO_HANDLE_NONE) {
3710                    addOutput(output, desc);
3711                    if (device_distinguishes_on_address(device) && address != "0") {
3712                        sp<AudioPolicyMix> policyMix;
3713                        if (mPolicyMixes.getAudioPolicyMix(address, policyMix) != NO_ERROR) {
3714                            ALOGE("checkOutputsForDevice() cannot find policy for address %s",
3715                                  address.string());
3716                        }
3717                        policyMix->setOutput(desc);
3718                        desc->mPolicyMix = policyMix->getMix();
3719
3720                    } else if (((desc->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) == 0) &&
3721                                    hasPrimaryOutput()) {
3722                        // no duplicated output for direct outputs and
3723                        // outputs used by dynamic policy mixes
3724                        audio_io_handle_t duplicatedOutput = AUDIO_IO_HANDLE_NONE;
3725
3726                        // set initial stream volume for device
3727                        applyStreamVolumes(desc, device, 0, true);
3728
3729                        //TODO: configure audio effect output stage here
3730
3731                        // open a duplicating output thread for the new output and the primary output
3732                        duplicatedOutput =
3733                                mpClientInterface->openDuplicateOutput(output,
3734                                                                       mPrimaryOutput->mIoHandle);
3735                        if (duplicatedOutput != AUDIO_IO_HANDLE_NONE) {
3736                            // add duplicated output descriptor
3737                            sp<SwAudioOutputDescriptor> dupOutputDesc =
3738                                    new SwAudioOutputDescriptor(NULL, mpClientInterface);
3739                            dupOutputDesc->mOutput1 = mPrimaryOutput;
3740                            dupOutputDesc->mOutput2 = desc;
3741                            dupOutputDesc->mSamplingRate = desc->mSamplingRate;
3742                            dupOutputDesc->mFormat = desc->mFormat;
3743                            dupOutputDesc->mChannelMask = desc->mChannelMask;
3744                            dupOutputDesc->mLatency = desc->mLatency;
3745                            addOutput(duplicatedOutput, dupOutputDesc);
3746                            applyStreamVolumes(dupOutputDesc, device, 0, true);
3747                        } else {
3748                            ALOGW("checkOutputsForDevice() could not open dup output for %d and %d",
3749                                    mPrimaryOutput->mIoHandle, output);
3750                            mpClientInterface->closeOutput(output);
3751                            removeOutput(output);
3752                            nextAudioPortGeneration();
3753                            output = AUDIO_IO_HANDLE_NONE;
3754                        }
3755                    }
3756                }
3757            } else {
3758                output = AUDIO_IO_HANDLE_NONE;
3759            }
3760            if (output == AUDIO_IO_HANDLE_NONE) {
3761                ALOGW("checkOutputsForDevice() could not open output for device %x", device);
3762                profiles.removeAt(profile_index);
3763                profile_index--;
3764            } else {
3765                outputs.add(output);
3766                // Load digital format info only for digital devices
3767                if (audio_device_is_digital(device)) {
3768                    devDesc->importAudioPort(profile);
3769                }
3770
3771                if (device_distinguishes_on_address(device)) {
3772                    ALOGV("checkOutputsForDevice(): setOutputDevice(dev=0x%x, addr=%s)",
3773                            device, address.string());
3774                    setOutputDevice(desc, device, true/*force*/, 0/*delay*/,
3775                            NULL/*patch handle*/, address.string());
3776                }
3777                ALOGV("checkOutputsForDevice(): adding output %d", output);
3778            }
3779        }
3780
3781        if (profiles.isEmpty()) {
3782            ALOGW("checkOutputsForDevice(): No output available for device %04x", device);
3783            return BAD_VALUE;
3784        }
3785    } else { // Disconnect
3786        // check if one opened output is not needed any more after disconnecting one device
3787        for (size_t i = 0; i < mOutputs.size(); i++) {
3788            desc = mOutputs.valueAt(i);
3789            if (!desc->isDuplicated()) {
3790                // exact match on device
3791                if (device_distinguishes_on_address(device) &&
3792                        (desc->supportedDevices() == device)) {
3793                    findIoHandlesByAddress(desc, device, address, outputs);
3794                } else if (!(desc->supportedDevices() & mAvailableOutputDevices.types())) {
3795                    ALOGV("checkOutputsForDevice(): disconnecting adding output %d",
3796                            mOutputs.keyAt(i));
3797                    outputs.add(mOutputs.keyAt(i));
3798                }
3799            }
3800        }
3801        // Clear any profiles associated with the disconnected device.
3802        for (size_t i = 0; i < mHwModules.size(); i++)
3803        {
3804            if (mHwModules[i]->mHandle == 0) {
3805                continue;
3806            }
3807            for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
3808            {
3809                sp<IOProfile> profile = mHwModules[i]->mOutputProfiles[j];
3810                if (profile->supportDevice(device)) {
3811                    ALOGV("checkOutputsForDevice(): "
3812                            "clearing direct output profile %zu on module %zu", j, i);
3813                    profile->clearAudioProfiles();
3814                }
3815            }
3816        }
3817    }
3818    return NO_ERROR;
3819}
3820
3821status_t AudioPolicyManager::checkInputsForDevice(const sp<DeviceDescriptor> devDesc,
3822                                                  audio_policy_dev_state_t state,
3823                                                  SortedVector<audio_io_handle_t>& inputs,
3824                                                  const String8 address)
3825{
3826    audio_devices_t device = devDesc->type();
3827    sp<AudioInputDescriptor> desc;
3828
3829    if (audio_device_is_digital(device)) {
3830        // erase all current sample rates, formats and channel masks
3831        devDesc->clearAudioProfiles();
3832    }
3833
3834    if (state == AUDIO_POLICY_DEVICE_STATE_AVAILABLE) {
3835        // first list already open inputs that can be routed to this device
3836        for (size_t input_index = 0; input_index < mInputs.size(); input_index++) {
3837            desc = mInputs.valueAt(input_index);
3838            if (desc->mProfile->supportDevice(device)) {
3839                ALOGV("checkInputsForDevice(): adding opened input %d", mInputs.keyAt(input_index));
3840               inputs.add(mInputs.keyAt(input_index));
3841            }
3842        }
3843
3844        // then look for input profiles that can be routed to this device
3845        SortedVector< sp<IOProfile> > profiles;
3846        for (size_t module_idx = 0; module_idx < mHwModules.size(); module_idx++)
3847        {
3848            if (mHwModules[module_idx]->mHandle == 0) {
3849                continue;
3850            }
3851            for (size_t profile_index = 0;
3852                 profile_index < mHwModules[module_idx]->mInputProfiles.size();
3853                 profile_index++)
3854            {
3855                sp<IOProfile> profile = mHwModules[module_idx]->mInputProfiles[profile_index];
3856
3857                if (profile->supportDevice(device)) {
3858                    if (!device_distinguishes_on_address(device) ||
3859                            profile->supportDeviceAddress(address)) {
3860                        profiles.add(profile);
3861                        ALOGV("checkInputsForDevice(): adding profile %zu from module %zu",
3862                              profile_index, module_idx);
3863                    }
3864                }
3865            }
3866        }
3867
3868        if (profiles.isEmpty() && inputs.isEmpty()) {
3869            ALOGW("checkInputsForDevice(): No input available for device 0x%X", device);
3870            return BAD_VALUE;
3871        }
3872
3873        // open inputs for matching profiles if needed. Direct inputs are also opened to
3874        // query for dynamic parameters and will be closed later by setDeviceConnectionState()
3875        for (ssize_t profile_index = 0; profile_index < (ssize_t)profiles.size(); profile_index++) {
3876
3877            sp<IOProfile> profile = profiles[profile_index];
3878            // nothing to do if one input is already opened for this profile
3879            size_t input_index;
3880            for (input_index = 0; input_index < mInputs.size(); input_index++) {
3881                desc = mInputs.valueAt(input_index);
3882                if (desc->mProfile == profile) {
3883                    if (audio_device_is_digital(device)) {
3884                        devDesc->importAudioPort(profile);
3885                    }
3886                    break;
3887                }
3888            }
3889            if (input_index != mInputs.size()) {
3890                continue;
3891            }
3892
3893            ALOGV("opening input for device 0x%X with params %s", device, address.string());
3894            desc = new AudioInputDescriptor(profile);
3895            desc->mDevice = device;
3896            audio_config_t config = AUDIO_CONFIG_INITIALIZER;
3897            config.sample_rate = desc->mSamplingRate;
3898            config.channel_mask = desc->mChannelMask;
3899            config.format = desc->mFormat;
3900            audio_io_handle_t input = AUDIO_IO_HANDLE_NONE;
3901            status_t status = mpClientInterface->openInput(profile->getModuleHandle(),
3902                                                           &input,
3903                                                           &config,
3904                                                           &desc->mDevice,
3905                                                           address,
3906                                                           AUDIO_SOURCE_MIC,
3907                                                           AUDIO_INPUT_FLAG_NONE /*FIXME*/);
3908
3909            if (status == NO_ERROR) {
3910                desc->mSamplingRate = config.sample_rate;
3911                desc->mChannelMask = config.channel_mask;
3912                desc->mFormat = config.format;
3913
3914                if (!address.isEmpty()) {
3915                    char *param = audio_device_address_to_parameter(device, address);
3916                    mpClientInterface->setParameters(input, String8(param));
3917                    free(param);
3918                }
3919                updateAudioProfiles(input, profile->getAudioProfiles());
3920                if (!profile->hasValidAudioProfile()) {
3921                    ALOGW("checkInputsForDevice() direct input missing param");
3922                    mpClientInterface->closeInput(input);
3923                    input = AUDIO_IO_HANDLE_NONE;
3924                }
3925
3926                if (input != 0) {
3927                    addInput(input, desc);
3928                }
3929            } // endif input != 0
3930
3931            if (input == AUDIO_IO_HANDLE_NONE) {
3932                ALOGW("checkInputsForDevice() could not open input for device 0x%X", device);
3933                profiles.removeAt(profile_index);
3934                profile_index--;
3935            } else {
3936                inputs.add(input);
3937                if (audio_device_is_digital(device)) {
3938                    devDesc->importAudioPort(profile);
3939                }
3940                ALOGV("checkInputsForDevice(): adding input %d", input);
3941            }
3942        } // end scan profiles
3943
3944        if (profiles.isEmpty()) {
3945            ALOGW("checkInputsForDevice(): No input available for device 0x%X", device);
3946            return BAD_VALUE;
3947        }
3948    } else {
3949        // Disconnect
3950        // check if one opened input is not needed any more after disconnecting one device
3951        for (size_t input_index = 0; input_index < mInputs.size(); input_index++) {
3952            desc = mInputs.valueAt(input_index);
3953            if (!(desc->mProfile->supportDevice(mAvailableInputDevices.types()))) {
3954                ALOGV("checkInputsForDevice(): disconnecting adding input %d",
3955                      mInputs.keyAt(input_index));
3956                inputs.add(mInputs.keyAt(input_index));
3957            }
3958        }
3959        // Clear any profiles associated with the disconnected device.
3960        for (size_t module_index = 0; module_index < mHwModules.size(); module_index++) {
3961            if (mHwModules[module_index]->mHandle == 0) {
3962                continue;
3963            }
3964            for (size_t profile_index = 0;
3965                 profile_index < mHwModules[module_index]->mInputProfiles.size();
3966                 profile_index++) {
3967                sp<IOProfile> profile = mHwModules[module_index]->mInputProfiles[profile_index];
3968                if (profile->supportDevice(device)) {
3969                    ALOGV("checkInputsForDevice(): clearing direct input profile %zu on module %zu",
3970                          profile_index, module_index);
3971                    profile->clearAudioProfiles();
3972                }
3973            }
3974        }
3975    } // end disconnect
3976
3977    return NO_ERROR;
3978}
3979
3980
3981void AudioPolicyManager::closeOutput(audio_io_handle_t output)
3982{
3983    ALOGV("closeOutput(%d)", output);
3984
3985    sp<SwAudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
3986    if (outputDesc == NULL) {
3987        ALOGW("closeOutput() unknown output %d", output);
3988        return;
3989    }
3990    mPolicyMixes.closeOutput(outputDesc);
3991
3992    // look for duplicated outputs connected to the output being removed.
3993    for (size_t i = 0; i < mOutputs.size(); i++) {
3994        sp<SwAudioOutputDescriptor> dupOutputDesc = mOutputs.valueAt(i);
3995        if (dupOutputDesc->isDuplicated() &&
3996                (dupOutputDesc->mOutput1 == outputDesc ||
3997                dupOutputDesc->mOutput2 == outputDesc)) {
3998            sp<AudioOutputDescriptor> outputDesc2;
3999            if (dupOutputDesc->mOutput1 == outputDesc) {
4000                outputDesc2 = dupOutputDesc->mOutput2;
4001            } else {
4002                outputDesc2 = dupOutputDesc->mOutput1;
4003            }
4004            // As all active tracks on duplicated output will be deleted,
4005            // and as they were also referenced on the other output, the reference
4006            // count for their stream type must be adjusted accordingly on
4007            // the other output.
4008            for (int j = 0; j < AUDIO_STREAM_CNT; j++) {
4009                int refCount = dupOutputDesc->mRefCount[j];
4010                outputDesc2->changeRefCount((audio_stream_type_t)j,-refCount);
4011            }
4012            audio_io_handle_t duplicatedOutput = mOutputs.keyAt(i);
4013            ALOGV("closeOutput() closing also duplicated output %d", duplicatedOutput);
4014
4015            mpClientInterface->closeOutput(duplicatedOutput);
4016            removeOutput(duplicatedOutput);
4017        }
4018    }
4019
4020    nextAudioPortGeneration();
4021
4022    ssize_t index = mAudioPatches.indexOfKey(outputDesc->getPatchHandle());
4023    if (index >= 0) {
4024        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
4025        status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, 0);
4026        mAudioPatches.removeItemsAt(index);
4027        mpClientInterface->onAudioPatchListUpdate();
4028    }
4029
4030    AudioParameter param;
4031    param.add(String8("closing"), String8("true"));
4032    mpClientInterface->setParameters(output, param.toString());
4033
4034    mpClientInterface->closeOutput(output);
4035    removeOutput(output);
4036    mPreviousOutputs = mOutputs;
4037}
4038
4039void AudioPolicyManager::closeInput(audio_io_handle_t input)
4040{
4041    ALOGV("closeInput(%d)", input);
4042
4043    sp<AudioInputDescriptor> inputDesc = mInputs.valueFor(input);
4044    if (inputDesc == NULL) {
4045        ALOGW("closeInput() unknown input %d", input);
4046        return;
4047    }
4048
4049    nextAudioPortGeneration();
4050
4051    ssize_t index = mAudioPatches.indexOfKey(inputDesc->getPatchHandle());
4052    if (index >= 0) {
4053        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
4054        status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, 0);
4055        mAudioPatches.removeItemsAt(index);
4056        mpClientInterface->onAudioPatchListUpdate();
4057    }
4058
4059    mpClientInterface->closeInput(input);
4060    mInputs.removeItem(input);
4061}
4062
4063SortedVector<audio_io_handle_t> AudioPolicyManager::getOutputsForDevice(
4064                                                                audio_devices_t device,
4065                                                                SwAudioOutputCollection openOutputs)
4066{
4067    SortedVector<audio_io_handle_t> outputs;
4068
4069    ALOGVV("getOutputsForDevice() device %04x", device);
4070    for (size_t i = 0; i < openOutputs.size(); i++) {
4071        ALOGVV("output %d isDuplicated=%d device=%04x",
4072                i, openOutputs.valueAt(i)->isDuplicated(),
4073                openOutputs.valueAt(i)->supportedDevices());
4074        if ((device & openOutputs.valueAt(i)->supportedDevices()) == device) {
4075            ALOGVV("getOutputsForDevice() found output %d", openOutputs.keyAt(i));
4076            outputs.add(openOutputs.keyAt(i));
4077        }
4078    }
4079    return outputs;
4080}
4081
4082bool AudioPolicyManager::vectorsEqual(SortedVector<audio_io_handle_t>& outputs1,
4083                                      SortedVector<audio_io_handle_t>& outputs2)
4084{
4085    if (outputs1.size() != outputs2.size()) {
4086        return false;
4087    }
4088    for (size_t i = 0; i < outputs1.size(); i++) {
4089        if (outputs1[i] != outputs2[i]) {
4090            return false;
4091        }
4092    }
4093    return true;
4094}
4095
4096void AudioPolicyManager::checkOutputForStrategy(routing_strategy strategy)
4097{
4098    audio_devices_t oldDevice = getDeviceForStrategy(strategy, true /*fromCache*/);
4099    audio_devices_t newDevice = getDeviceForStrategy(strategy, false /*fromCache*/);
4100    SortedVector<audio_io_handle_t> srcOutputs = getOutputsForDevice(oldDevice, mPreviousOutputs);
4101    SortedVector<audio_io_handle_t> dstOutputs = getOutputsForDevice(newDevice, mOutputs);
4102
4103    // also take into account external policy-related changes: add all outputs which are
4104    // associated with policies in the "before" and "after" output vectors
4105    ALOGVV("checkOutputForStrategy(): policy related outputs");
4106    for (size_t i = 0 ; i < mPreviousOutputs.size() ; i++) {
4107        const sp<SwAudioOutputDescriptor> desc = mPreviousOutputs.valueAt(i);
4108        if (desc != 0 && desc->mPolicyMix != NULL) {
4109            srcOutputs.add(desc->mIoHandle);
4110            ALOGVV(" previous outputs: adding %d", desc->mIoHandle);
4111        }
4112    }
4113    for (size_t i = 0 ; i < mOutputs.size() ; i++) {
4114        const sp<SwAudioOutputDescriptor> desc = mOutputs.valueAt(i);
4115        if (desc != 0 && desc->mPolicyMix != NULL) {
4116            dstOutputs.add(desc->mIoHandle);
4117            ALOGVV(" new outputs: adding %d", desc->mIoHandle);
4118        }
4119    }
4120
4121    if (!vectorsEqual(srcOutputs,dstOutputs)) {
4122        ALOGV("checkOutputForStrategy() strategy %d, moving from output %d to output %d",
4123              strategy, srcOutputs[0], dstOutputs[0]);
4124        // mute strategy while moving tracks from one output to another
4125        for (size_t i = 0; i < srcOutputs.size(); i++) {
4126            sp<SwAudioOutputDescriptor> desc = mOutputs.valueFor(srcOutputs[i]);
4127            if (isStrategyActive(desc, strategy)) {
4128                setStrategyMute(strategy, true, desc);
4129                setStrategyMute(strategy, false, desc, MUTE_TIME_MS, newDevice);
4130            }
4131            sp<AudioSourceDescriptor> source =
4132                    getSourceForStrategyOnOutput(srcOutputs[i], strategy);
4133            if (source != 0){
4134                connectAudioSource(source);
4135            }
4136        }
4137
4138        // Move effects associated to this strategy from previous output to new output
4139        if (strategy == STRATEGY_MEDIA) {
4140            audio_io_handle_t fxOutput = selectOutputForEffects(dstOutputs);
4141            SortedVector<audio_io_handle_t> moved;
4142            for (size_t i = 0; i < mEffects.size(); i++) {
4143                sp<EffectDescriptor> effectDesc = mEffects.valueAt(i);
4144                if (effectDesc->mSession == AUDIO_SESSION_OUTPUT_MIX &&
4145                        effectDesc->mIo != fxOutput) {
4146                    if (moved.indexOf(effectDesc->mIo) < 0) {
4147                        ALOGV("checkOutputForStrategy() moving effect %d to output %d",
4148                              mEffects.keyAt(i), fxOutput);
4149                        mpClientInterface->moveEffects(AUDIO_SESSION_OUTPUT_MIX, effectDesc->mIo,
4150                                                       fxOutput);
4151                        moved.add(effectDesc->mIo);
4152                    }
4153                    effectDesc->mIo = fxOutput;
4154                }
4155            }
4156        }
4157        // Move tracks associated to this strategy from previous output to new output
4158        for (int i = 0; i < AUDIO_STREAM_FOR_POLICY_CNT; i++) {
4159            if (getStrategy((audio_stream_type_t)i) == strategy) {
4160                mpClientInterface->invalidateStream((audio_stream_type_t)i);
4161            }
4162        }
4163    }
4164}
4165
4166void AudioPolicyManager::checkOutputForAllStrategies()
4167{
4168    if (mEngine->getForceUse(AUDIO_POLICY_FORCE_FOR_SYSTEM) == AUDIO_POLICY_FORCE_SYSTEM_ENFORCED)
4169        checkOutputForStrategy(STRATEGY_ENFORCED_AUDIBLE);
4170    checkOutputForStrategy(STRATEGY_PHONE);
4171    if (mEngine->getForceUse(AUDIO_POLICY_FORCE_FOR_SYSTEM) != AUDIO_POLICY_FORCE_SYSTEM_ENFORCED)
4172        checkOutputForStrategy(STRATEGY_ENFORCED_AUDIBLE);
4173    checkOutputForStrategy(STRATEGY_SONIFICATION);
4174    checkOutputForStrategy(STRATEGY_SONIFICATION_RESPECTFUL);
4175    checkOutputForStrategy(STRATEGY_ACCESSIBILITY);
4176    checkOutputForStrategy(STRATEGY_MEDIA);
4177    checkOutputForStrategy(STRATEGY_DTMF);
4178    checkOutputForStrategy(STRATEGY_REROUTING);
4179}
4180
4181void AudioPolicyManager::checkA2dpSuspend()
4182{
4183    audio_io_handle_t a2dpOutput = mOutputs.getA2dpOutput();
4184    if (a2dpOutput == 0) {
4185        mA2dpSuspended = false;
4186        return;
4187    }
4188
4189    bool isScoConnected =
4190            ((mAvailableInputDevices.types() & AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET &
4191                    ~AUDIO_DEVICE_BIT_IN) != 0) ||
4192            ((mAvailableOutputDevices.types() & AUDIO_DEVICE_OUT_ALL_SCO) != 0);
4193    // suspend A2DP output if:
4194    //      (NOT already suspended) &&
4195    //      ((SCO device is connected &&
4196    //       (forced usage for communication || for record is SCO))) ||
4197    //      (phone state is ringing || in call)
4198    //
4199    // restore A2DP output if:
4200    //      (Already suspended) &&
4201    //      ((SCO device is NOT connected ||
4202    //       (forced usage NOT for communication && NOT for record is SCO))) &&
4203    //      (phone state is NOT ringing && NOT in call)
4204    //
4205    if (mA2dpSuspended) {
4206        if ((!isScoConnected ||
4207             ((mEngine->getForceUse(AUDIO_POLICY_FORCE_FOR_COMMUNICATION) != AUDIO_POLICY_FORCE_BT_SCO) &&
4208              (mEngine->getForceUse(AUDIO_POLICY_FORCE_FOR_RECORD) != AUDIO_POLICY_FORCE_BT_SCO))) &&
4209             ((mEngine->getPhoneState() != AUDIO_MODE_IN_CALL) &&
4210              (mEngine->getPhoneState() != AUDIO_MODE_RINGTONE))) {
4211
4212            mpClientInterface->restoreOutput(a2dpOutput);
4213            mA2dpSuspended = false;
4214        }
4215    } else {
4216        if ((isScoConnected &&
4217             ((mEngine->getForceUse(AUDIO_POLICY_FORCE_FOR_COMMUNICATION) == AUDIO_POLICY_FORCE_BT_SCO) ||
4218              (mEngine->getForceUse(AUDIO_POLICY_FORCE_FOR_RECORD) == AUDIO_POLICY_FORCE_BT_SCO))) ||
4219             ((mEngine->getPhoneState() == AUDIO_MODE_IN_CALL) ||
4220              (mEngine->getPhoneState() == AUDIO_MODE_RINGTONE))) {
4221
4222            mpClientInterface->suspendOutput(a2dpOutput);
4223            mA2dpSuspended = true;
4224        }
4225    }
4226}
4227
4228audio_devices_t AudioPolicyManager::getNewOutputDevice(const sp<AudioOutputDescriptor>& outputDesc,
4229                                                       bool fromCache)
4230{
4231    audio_devices_t device = AUDIO_DEVICE_NONE;
4232
4233    ssize_t index = mAudioPatches.indexOfKey(outputDesc->getPatchHandle());
4234    if (index >= 0) {
4235        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
4236        if (patchDesc->mUid != mUidCached) {
4237            ALOGV("getNewOutputDevice() device %08x forced by patch %d",
4238                  outputDesc->device(), outputDesc->getPatchHandle());
4239            return outputDesc->device();
4240        }
4241    }
4242
4243    // check the following by order of priority to request a routing change if necessary:
4244    // 1: the strategy enforced audible is active and enforced on the output:
4245    //      use device for strategy enforced audible
4246    // 2: we are in call or the strategy phone is active on the output:
4247    //      use device for strategy phone
4248    // 3: the strategy for enforced audible is active but not enforced on the output:
4249    //      use the device for strategy enforced audible
4250    // 4: the strategy sonification is active on the output:
4251    //      use device for strategy sonification
4252    // 5: the strategy accessibility is active on the output:
4253    //      use device for strategy accessibility
4254    // 6: the strategy "respectful" sonification is active on the output:
4255    //      use device for strategy "respectful" sonification
4256    // 7: the strategy media is active on the output:
4257    //      use device for strategy media
4258    // 8: the strategy DTMF is active on the output:
4259    //      use device for strategy DTMF
4260    // 9: the strategy for beacon, a.k.a. "transmitted through speaker" is active on the output:
4261    //      use device for strategy t-t-s
4262    if (isStrategyActive(outputDesc, STRATEGY_ENFORCED_AUDIBLE) &&
4263        mEngine->getForceUse(AUDIO_POLICY_FORCE_FOR_SYSTEM) == AUDIO_POLICY_FORCE_SYSTEM_ENFORCED) {
4264        device = getDeviceForStrategy(STRATEGY_ENFORCED_AUDIBLE, fromCache);
4265    } else if (isInCall() ||
4266                    isStrategyActive(outputDesc, STRATEGY_PHONE)) {
4267        device = getDeviceForStrategy(STRATEGY_PHONE, fromCache);
4268    } else if (isStrategyActive(outputDesc, STRATEGY_ENFORCED_AUDIBLE)) {
4269        device = getDeviceForStrategy(STRATEGY_ENFORCED_AUDIBLE, fromCache);
4270    } else if (isStrategyActive(outputDesc, STRATEGY_SONIFICATION)) {
4271        device = getDeviceForStrategy(STRATEGY_SONIFICATION, fromCache);
4272    } else if (isStrategyActive(outputDesc, STRATEGY_ACCESSIBILITY)) {
4273        device = getDeviceForStrategy(STRATEGY_ACCESSIBILITY, fromCache);
4274    } else if (isStrategyActive(outputDesc, STRATEGY_SONIFICATION_RESPECTFUL)) {
4275        device = getDeviceForStrategy(STRATEGY_SONIFICATION_RESPECTFUL, fromCache);
4276    } else if (isStrategyActive(outputDesc, STRATEGY_MEDIA)) {
4277        device = getDeviceForStrategy(STRATEGY_MEDIA, fromCache);
4278    } else if (isStrategyActive(outputDesc, STRATEGY_DTMF)) {
4279        device = getDeviceForStrategy(STRATEGY_DTMF, fromCache);
4280    } else if (isStrategyActive(outputDesc, STRATEGY_TRANSMITTED_THROUGH_SPEAKER)) {
4281        device = getDeviceForStrategy(STRATEGY_TRANSMITTED_THROUGH_SPEAKER, fromCache);
4282    } else if (isStrategyActive(outputDesc, STRATEGY_REROUTING)) {
4283        device = getDeviceForStrategy(STRATEGY_REROUTING, fromCache);
4284    }
4285
4286    ALOGV("getNewOutputDevice() selected device %x", device);
4287    return device;
4288}
4289
4290audio_devices_t AudioPolicyManager::getNewInputDevice(audio_io_handle_t input)
4291{
4292    sp<AudioInputDescriptor> inputDesc = mInputs.valueFor(input);
4293
4294    ssize_t index = mAudioPatches.indexOfKey(inputDesc->getPatchHandle());
4295    if (index >= 0) {
4296        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
4297        if (patchDesc->mUid != mUidCached) {
4298            ALOGV("getNewInputDevice() device %08x forced by patch %d",
4299                  inputDesc->mDevice, inputDesc->getPatchHandle());
4300            return inputDesc->mDevice;
4301        }
4302    }
4303
4304    audio_devices_t device = getDeviceAndMixForInputSource(inputDesc->inputSource());
4305
4306    return device;
4307}
4308
4309bool AudioPolicyManager::streamsMatchForvolume(audio_stream_type_t stream1,
4310                                               audio_stream_type_t stream2) {
4311    return ((stream1 == stream2) ||
4312            ((stream1 == AUDIO_STREAM_ACCESSIBILITY) && (stream2 == AUDIO_STREAM_MUSIC)) ||
4313            ((stream1 == AUDIO_STREAM_MUSIC) && (stream2 == AUDIO_STREAM_ACCESSIBILITY)));
4314}
4315
4316uint32_t AudioPolicyManager::getStrategyForStream(audio_stream_type_t stream) {
4317    return (uint32_t)getStrategy(stream);
4318}
4319
4320audio_devices_t AudioPolicyManager::getDevicesForStream(audio_stream_type_t stream) {
4321    // By checking the range of stream before calling getStrategy, we avoid
4322    // getStrategy's behavior for invalid streams.  getStrategy would do a ALOGE
4323    // and then return STRATEGY_MEDIA, but we want to return the empty set.
4324    if (stream < (audio_stream_type_t) 0 || stream >= AUDIO_STREAM_PUBLIC_CNT) {
4325        return AUDIO_DEVICE_NONE;
4326    }
4327    audio_devices_t devices = AUDIO_DEVICE_NONE;
4328    for (int curStream = 0; curStream < AUDIO_STREAM_FOR_POLICY_CNT; curStream++) {
4329        if (!streamsMatchForvolume(stream, (audio_stream_type_t)curStream)) {
4330            continue;
4331        }
4332        routing_strategy curStrategy = getStrategy((audio_stream_type_t)curStream);
4333        audio_devices_t curDevices =
4334                getDeviceForStrategy((routing_strategy)curStrategy, true /*fromCache*/);
4335        SortedVector<audio_io_handle_t> outputs = getOutputsForDevice(curDevices, mOutputs);
4336        for (size_t i = 0; i < outputs.size(); i++) {
4337            sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(outputs[i]);
4338            if (outputDesc->isStreamActive((audio_stream_type_t)curStream)) {
4339                curDevices |= outputDesc->device();
4340            }
4341        }
4342        devices |= curDevices;
4343    }
4344
4345    /*Filter SPEAKER_SAFE out of results, as AudioService doesn't know about it
4346      and doesn't really need to.*/
4347    if (devices & AUDIO_DEVICE_OUT_SPEAKER_SAFE) {
4348        devices |= AUDIO_DEVICE_OUT_SPEAKER;
4349        devices &= ~AUDIO_DEVICE_OUT_SPEAKER_SAFE;
4350    }
4351    return devices;
4352}
4353
4354routing_strategy AudioPolicyManager::getStrategy(audio_stream_type_t stream) const
4355{
4356    ALOG_ASSERT(stream != AUDIO_STREAM_PATCH,"getStrategy() called for AUDIO_STREAM_PATCH");
4357    return mEngine->getStrategyForStream(stream);
4358}
4359
4360uint32_t AudioPolicyManager::getStrategyForAttr(const audio_attributes_t *attr) {
4361    // flags to strategy mapping
4362    if ((attr->flags & AUDIO_FLAG_BEACON) == AUDIO_FLAG_BEACON) {
4363        return (uint32_t) STRATEGY_TRANSMITTED_THROUGH_SPEAKER;
4364    }
4365    if ((attr->flags & AUDIO_FLAG_AUDIBILITY_ENFORCED) == AUDIO_FLAG_AUDIBILITY_ENFORCED) {
4366        return (uint32_t) STRATEGY_ENFORCED_AUDIBLE;
4367    }
4368    // usage to strategy mapping
4369    return static_cast<uint32_t>(mEngine->getStrategyForUsage(attr->usage));
4370}
4371
4372void AudioPolicyManager::handleNotificationRoutingForStream(audio_stream_type_t stream) {
4373    switch(stream) {
4374    case AUDIO_STREAM_MUSIC:
4375        checkOutputForStrategy(STRATEGY_SONIFICATION_RESPECTFUL);
4376        updateDevicesAndOutputs();
4377        break;
4378    default:
4379        break;
4380    }
4381}
4382
4383uint32_t AudioPolicyManager::handleEventForBeacon(int event) {
4384
4385    // skip beacon mute management if a dedicated TTS output is available
4386    if (mTtsOutputAvailable) {
4387        return 0;
4388    }
4389
4390    switch(event) {
4391    case STARTING_OUTPUT:
4392        mBeaconMuteRefCount++;
4393        break;
4394    case STOPPING_OUTPUT:
4395        if (mBeaconMuteRefCount > 0) {
4396            mBeaconMuteRefCount--;
4397        }
4398        break;
4399    case STARTING_BEACON:
4400        mBeaconPlayingRefCount++;
4401        break;
4402    case STOPPING_BEACON:
4403        if (mBeaconPlayingRefCount > 0) {
4404            mBeaconPlayingRefCount--;
4405        }
4406        break;
4407    }
4408
4409    if (mBeaconMuteRefCount > 0) {
4410        // any playback causes beacon to be muted
4411        return setBeaconMute(true);
4412    } else {
4413        // no other playback: unmute when beacon starts playing, mute when it stops
4414        return setBeaconMute(mBeaconPlayingRefCount == 0);
4415    }
4416}
4417
4418uint32_t AudioPolicyManager::setBeaconMute(bool mute) {
4419    ALOGV("setBeaconMute(%d) mBeaconMuteRefCount=%d mBeaconPlayingRefCount=%d",
4420            mute, mBeaconMuteRefCount, mBeaconPlayingRefCount);
4421    // keep track of muted state to avoid repeating mute/unmute operations
4422    if (mBeaconMuted != mute) {
4423        // mute/unmute AUDIO_STREAM_TTS on all outputs
4424        ALOGV("\t muting %d", mute);
4425        uint32_t maxLatency = 0;
4426        for (size_t i = 0; i < mOutputs.size(); i++) {
4427            sp<SwAudioOutputDescriptor> desc = mOutputs.valueAt(i);
4428            setStreamMute(AUDIO_STREAM_TTS, mute/*on*/,
4429                    desc,
4430                    0 /*delay*/, AUDIO_DEVICE_NONE);
4431            const uint32_t latency = desc->latency() * 2;
4432            if (latency > maxLatency) {
4433                maxLatency = latency;
4434            }
4435        }
4436        mBeaconMuted = mute;
4437        return maxLatency;
4438    }
4439    return 0;
4440}
4441
4442audio_devices_t AudioPolicyManager::getDeviceForStrategy(routing_strategy strategy,
4443                                                         bool fromCache)
4444{
4445    // Routing
4446    // see if we have an explicit route
4447    // scan the whole RouteMap, for each entry, convert the stream type to a strategy
4448    // (getStrategy(stream)).
4449    // if the strategy from the stream type in the RouteMap is the same as the argument above,
4450    // and activity count is non-zero
4451    // the device = the device from the descriptor in the RouteMap, and exit.
4452    for (size_t routeIndex = 0; routeIndex < mOutputRoutes.size(); routeIndex++) {
4453        sp<SessionRoute> route = mOutputRoutes.valueAt(routeIndex);
4454        routing_strategy routeStrategy = getStrategy(route->mStreamType);
4455        if ((routeStrategy == strategy) && route->isActive()) {
4456            return route->mDeviceDescriptor->type();
4457        }
4458    }
4459
4460    if (fromCache) {
4461        ALOGVV("getDeviceForStrategy() from cache strategy %d, device %x",
4462              strategy, mDeviceForStrategy[strategy]);
4463        return mDeviceForStrategy[strategy];
4464    }
4465    return mEngine->getDeviceForStrategy(strategy);
4466}
4467
4468void AudioPolicyManager::updateDevicesAndOutputs()
4469{
4470    for (int i = 0; i < NUM_STRATEGIES; i++) {
4471        mDeviceForStrategy[i] = getDeviceForStrategy((routing_strategy)i, false /*fromCache*/);
4472    }
4473    mPreviousOutputs = mOutputs;
4474}
4475
4476uint32_t AudioPolicyManager::checkDeviceMuteStrategies(sp<AudioOutputDescriptor> outputDesc,
4477                                                       audio_devices_t prevDevice,
4478                                                       uint32_t delayMs)
4479{
4480    // mute/unmute strategies using an incompatible device combination
4481    // if muting, wait for the audio in pcm buffer to be drained before proceeding
4482    // if unmuting, unmute only after the specified delay
4483    if (outputDesc->isDuplicated()) {
4484        return 0;
4485    }
4486
4487    uint32_t muteWaitMs = 0;
4488    audio_devices_t device = outputDesc->device();
4489    bool shouldMute = outputDesc->isActive() && (popcount(device) >= 2);
4490
4491    for (size_t i = 0; i < NUM_STRATEGIES; i++) {
4492        audio_devices_t curDevice = getDeviceForStrategy((routing_strategy)i, false /*fromCache*/);
4493        curDevice = curDevice & outputDesc->supportedDevices();
4494        bool mute = shouldMute && (curDevice & device) && (curDevice != device);
4495        bool doMute = false;
4496
4497        if (mute && !outputDesc->mStrategyMutedByDevice[i]) {
4498            doMute = true;
4499            outputDesc->mStrategyMutedByDevice[i] = true;
4500        } else if (!mute && outputDesc->mStrategyMutedByDevice[i]){
4501            doMute = true;
4502            outputDesc->mStrategyMutedByDevice[i] = false;
4503        }
4504        if (doMute) {
4505            for (size_t j = 0; j < mOutputs.size(); j++) {
4506                sp<AudioOutputDescriptor> desc = mOutputs.valueAt(j);
4507                // skip output if it does not share any device with current output
4508                if ((desc->supportedDevices() & outputDesc->supportedDevices())
4509                        == AUDIO_DEVICE_NONE) {
4510                    continue;
4511                }
4512                ALOGVV("checkDeviceMuteStrategies() %s strategy %d (curDevice %04x)",
4513                      mute ? "muting" : "unmuting", i, curDevice);
4514                setStrategyMute((routing_strategy)i, mute, desc, mute ? 0 : delayMs);
4515                if (isStrategyActive(desc, (routing_strategy)i)) {
4516                    if (mute) {
4517                        // FIXME: should not need to double latency if volume could be applied
4518                        // immediately by the audioflinger mixer. We must account for the delay
4519                        // between now and the next time the audioflinger thread for this output
4520                        // will process a buffer (which corresponds to one buffer size,
4521                        // usually 1/2 or 1/4 of the latency).
4522                        if (muteWaitMs < desc->latency() * 2) {
4523                            muteWaitMs = desc->latency() * 2;
4524                        }
4525                    }
4526                }
4527            }
4528        }
4529    }
4530
4531    // temporary mute output if device selection changes to avoid volume bursts due to
4532    // different per device volumes
4533    if (outputDesc->isActive() && (device != prevDevice)) {
4534        if (muteWaitMs < outputDesc->latency() * 2) {
4535            muteWaitMs = outputDesc->latency() * 2;
4536        }
4537        for (size_t i = 0; i < NUM_STRATEGIES; i++) {
4538            if (isStrategyActive(outputDesc, (routing_strategy)i)) {
4539                setStrategyMute((routing_strategy)i, true, outputDesc);
4540                // do tempMute unmute after twice the mute wait time
4541                setStrategyMute((routing_strategy)i, false, outputDesc,
4542                                muteWaitMs *2, device);
4543            }
4544        }
4545    }
4546
4547    // wait for the PCM output buffers to empty before proceeding with the rest of the command
4548    if (muteWaitMs > delayMs) {
4549        muteWaitMs -= delayMs;
4550        usleep(muteWaitMs * 1000);
4551        return muteWaitMs;
4552    }
4553    return 0;
4554}
4555
4556uint32_t AudioPolicyManager::setOutputDevice(const sp<AudioOutputDescriptor>& outputDesc,
4557                                             audio_devices_t device,
4558                                             bool force,
4559                                             int delayMs,
4560                                             audio_patch_handle_t *patchHandle,
4561                                             const char* address)
4562{
4563    ALOGV("setOutputDevice() device %04x delayMs %d", device, delayMs);
4564    AudioParameter param;
4565    uint32_t muteWaitMs;
4566
4567    if (outputDesc->isDuplicated()) {
4568        muteWaitMs = setOutputDevice(outputDesc->subOutput1(), device, force, delayMs);
4569        muteWaitMs += setOutputDevice(outputDesc->subOutput2(), device, force, delayMs);
4570        return muteWaitMs;
4571    }
4572    // no need to proceed if new device is not AUDIO_DEVICE_NONE and not supported by current
4573    // output profile
4574    if ((device != AUDIO_DEVICE_NONE) &&
4575            ((device & outputDesc->supportedDevices()) == 0)) {
4576        return 0;
4577    }
4578
4579    // filter devices according to output selected
4580    device = (audio_devices_t)(device & outputDesc->supportedDevices());
4581
4582    audio_devices_t prevDevice = outputDesc->mDevice;
4583
4584    ALOGV("setOutputDevice() prevDevice 0x%04x", prevDevice);
4585
4586    if (device != AUDIO_DEVICE_NONE) {
4587        outputDesc->mDevice = device;
4588    }
4589    muteWaitMs = checkDeviceMuteStrategies(outputDesc, prevDevice, delayMs);
4590
4591    // Do not change the routing if:
4592    //      the requested device is AUDIO_DEVICE_NONE
4593    //      OR the requested device is the same as current device
4594    //  AND force is not specified
4595    //  AND the output is connected by a valid audio patch.
4596    // Doing this check here allows the caller to call setOutputDevice() without conditions
4597    if ((device == AUDIO_DEVICE_NONE || device == prevDevice) &&
4598        !force &&
4599        outputDesc->getPatchHandle() != 0) {
4600        ALOGV("setOutputDevice() setting same device 0x%04x or null device", device);
4601        return muteWaitMs;
4602    }
4603
4604    ALOGV("setOutputDevice() changing device");
4605
4606    // do the routing
4607    if (device == AUDIO_DEVICE_NONE) {
4608        resetOutputDevice(outputDesc, delayMs, NULL);
4609    } else {
4610        DeviceVector deviceList = (address == NULL) ?
4611                mAvailableOutputDevices.getDevicesFromType(device)
4612                : mAvailableOutputDevices.getDevicesFromTypeAddr(device, String8(address));
4613        if (!deviceList.isEmpty()) {
4614            struct audio_patch patch;
4615            outputDesc->toAudioPortConfig(&patch.sources[0]);
4616            patch.num_sources = 1;
4617            patch.num_sinks = 0;
4618            for (size_t i = 0; i < deviceList.size() && i < AUDIO_PATCH_PORTS_MAX; i++) {
4619                deviceList.itemAt(i)->toAudioPortConfig(&patch.sinks[i]);
4620                patch.num_sinks++;
4621            }
4622            ssize_t index;
4623            if (patchHandle && *patchHandle != AUDIO_PATCH_HANDLE_NONE) {
4624                index = mAudioPatches.indexOfKey(*patchHandle);
4625            } else {
4626                index = mAudioPatches.indexOfKey(outputDesc->getPatchHandle());
4627            }
4628            sp< AudioPatch> patchDesc;
4629            audio_patch_handle_t afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
4630            if (index >= 0) {
4631                patchDesc = mAudioPatches.valueAt(index);
4632                afPatchHandle = patchDesc->mAfPatchHandle;
4633            }
4634
4635            status_t status = mpClientInterface->createAudioPatch(&patch,
4636                                                                   &afPatchHandle,
4637                                                                   delayMs);
4638            ALOGV("setOutputDevice() createAudioPatch returned %d patchHandle %d"
4639                    "num_sources %d num_sinks %d",
4640                                       status, afPatchHandle, patch.num_sources, patch.num_sinks);
4641            if (status == NO_ERROR) {
4642                if (index < 0) {
4643                    patchDesc = new AudioPatch(&patch, mUidCached);
4644                    addAudioPatch(patchDesc->mHandle, patchDesc);
4645                } else {
4646                    patchDesc->mPatch = patch;
4647                }
4648                patchDesc->mAfPatchHandle = afPatchHandle;
4649                if (patchHandle) {
4650                    *patchHandle = patchDesc->mHandle;
4651                }
4652                outputDesc->setPatchHandle(patchDesc->mHandle);
4653                nextAudioPortGeneration();
4654                mpClientInterface->onAudioPatchListUpdate();
4655            }
4656        }
4657
4658        // inform all input as well
4659        for (size_t i = 0; i < mInputs.size(); i++) {
4660            const sp<AudioInputDescriptor>  inputDescriptor = mInputs.valueAt(i);
4661            if (!is_virtual_input_device(inputDescriptor->mDevice)) {
4662                AudioParameter inputCmd = AudioParameter();
4663                ALOGV("%s: inform input %d of device:%d", __func__,
4664                      inputDescriptor->mIoHandle, device);
4665                inputCmd.addInt(String8(AudioParameter::keyRouting),device);
4666                mpClientInterface->setParameters(inputDescriptor->mIoHandle,
4667                                                 inputCmd.toString(),
4668                                                 delayMs);
4669            }
4670        }
4671    }
4672
4673    // update stream volumes according to new device
4674    applyStreamVolumes(outputDesc, device, delayMs);
4675
4676    return muteWaitMs;
4677}
4678
4679status_t AudioPolicyManager::resetOutputDevice(const sp<AudioOutputDescriptor>& outputDesc,
4680                                               int delayMs,
4681                                               audio_patch_handle_t *patchHandle)
4682{
4683    ssize_t index;
4684    if (patchHandle) {
4685        index = mAudioPatches.indexOfKey(*patchHandle);
4686    } else {
4687        index = mAudioPatches.indexOfKey(outputDesc->getPatchHandle());
4688    }
4689    if (index < 0) {
4690        return INVALID_OPERATION;
4691    }
4692    sp< AudioPatch> patchDesc = mAudioPatches.valueAt(index);
4693    status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, delayMs);
4694    ALOGV("resetOutputDevice() releaseAudioPatch returned %d", status);
4695    outputDesc->setPatchHandle(0);
4696    removeAudioPatch(patchDesc->mHandle);
4697    nextAudioPortGeneration();
4698    mpClientInterface->onAudioPatchListUpdate();
4699    return status;
4700}
4701
4702status_t AudioPolicyManager::setInputDevice(audio_io_handle_t input,
4703                                            audio_devices_t device,
4704                                            bool force,
4705                                            audio_patch_handle_t *patchHandle)
4706{
4707    status_t status = NO_ERROR;
4708
4709    sp<AudioInputDescriptor> inputDesc = mInputs.valueFor(input);
4710    if ((device != AUDIO_DEVICE_NONE) && ((device != inputDesc->mDevice) || force)) {
4711        inputDesc->mDevice = device;
4712
4713        DeviceVector deviceList = mAvailableInputDevices.getDevicesFromType(device);
4714        if (!deviceList.isEmpty()) {
4715            struct audio_patch patch;
4716            inputDesc->toAudioPortConfig(&patch.sinks[0]);
4717            // AUDIO_SOURCE_HOTWORD is for internal use only:
4718            // handled as AUDIO_SOURCE_VOICE_RECOGNITION by the audio HAL
4719            if (patch.sinks[0].ext.mix.usecase.source == AUDIO_SOURCE_HOTWORD &&
4720                    !inputDesc->isSoundTrigger()) {
4721                patch.sinks[0].ext.mix.usecase.source = AUDIO_SOURCE_VOICE_RECOGNITION;
4722            }
4723            patch.num_sinks = 1;
4724            //only one input device for now
4725            deviceList.itemAt(0)->toAudioPortConfig(&patch.sources[0]);
4726            patch.num_sources = 1;
4727            ssize_t index;
4728            if (patchHandle && *patchHandle != AUDIO_PATCH_HANDLE_NONE) {
4729                index = mAudioPatches.indexOfKey(*patchHandle);
4730            } else {
4731                index = mAudioPatches.indexOfKey(inputDesc->getPatchHandle());
4732            }
4733            sp< AudioPatch> patchDesc;
4734            audio_patch_handle_t afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
4735            if (index >= 0) {
4736                patchDesc = mAudioPatches.valueAt(index);
4737                afPatchHandle = patchDesc->mAfPatchHandle;
4738            }
4739
4740            status_t status = mpClientInterface->createAudioPatch(&patch,
4741                                                                  &afPatchHandle,
4742                                                                  0);
4743            ALOGV("setInputDevice() createAudioPatch returned %d patchHandle %d",
4744                                                                          status, afPatchHandle);
4745            if (status == NO_ERROR) {
4746                if (index < 0) {
4747                    patchDesc = new AudioPatch(&patch, mUidCached);
4748                    addAudioPatch(patchDesc->mHandle, patchDesc);
4749                } else {
4750                    patchDesc->mPatch = patch;
4751                }
4752                patchDesc->mAfPatchHandle = afPatchHandle;
4753                if (patchHandle) {
4754                    *patchHandle = patchDesc->mHandle;
4755                }
4756                inputDesc->setPatchHandle(patchDesc->mHandle);
4757                nextAudioPortGeneration();
4758                mpClientInterface->onAudioPatchListUpdate();
4759            }
4760        }
4761    }
4762    return status;
4763}
4764
4765status_t AudioPolicyManager::resetInputDevice(audio_io_handle_t input,
4766                                              audio_patch_handle_t *patchHandle)
4767{
4768    sp<AudioInputDescriptor> inputDesc = mInputs.valueFor(input);
4769    ssize_t index;
4770    if (patchHandle) {
4771        index = mAudioPatches.indexOfKey(*patchHandle);
4772    } else {
4773        index = mAudioPatches.indexOfKey(inputDesc->getPatchHandle());
4774    }
4775    if (index < 0) {
4776        return INVALID_OPERATION;
4777    }
4778    sp< AudioPatch> patchDesc = mAudioPatches.valueAt(index);
4779    status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, 0);
4780    ALOGV("resetInputDevice() releaseAudioPatch returned %d", status);
4781    inputDesc->setPatchHandle(0);
4782    removeAudioPatch(patchDesc->mHandle);
4783    nextAudioPortGeneration();
4784    mpClientInterface->onAudioPatchListUpdate();
4785    return status;
4786}
4787
4788sp<IOProfile> AudioPolicyManager::getInputProfile(audio_devices_t device,
4789                                                  String8 address,
4790                                                  uint32_t& samplingRate,
4791                                                  audio_format_t& format,
4792                                                  audio_channel_mask_t& channelMask,
4793                                                  audio_input_flags_t flags)
4794{
4795    // Choose an input profile based on the requested capture parameters: select the first available
4796    // profile supporting all requested parameters.
4797    //
4798    // TODO: perhaps isCompatibleProfile should return a "matching" score so we can return
4799    // the best matching profile, not the first one.
4800
4801    for (size_t i = 0; i < mHwModules.size(); i++)
4802    {
4803        if (mHwModules[i]->mHandle == 0) {
4804            continue;
4805        }
4806        for (size_t j = 0; j < mHwModules[i]->mInputProfiles.size(); j++)
4807        {
4808            sp<IOProfile> profile = mHwModules[i]->mInputProfiles[j];
4809            // profile->log();
4810            if (profile->isCompatibleProfile(device, address, samplingRate,
4811                                             &samplingRate /*updatedSamplingRate*/,
4812                                             format,
4813                                             &format /*updatedFormat*/,
4814                                             channelMask,
4815                                             &channelMask /*updatedChannelMask*/,
4816                                             (audio_output_flags_t) flags)) {
4817
4818                return profile;
4819            }
4820        }
4821    }
4822    return NULL;
4823}
4824
4825
4826audio_devices_t AudioPolicyManager::getDeviceAndMixForInputSource(audio_source_t inputSource,
4827                                                                  AudioMix **policyMix)
4828{
4829    audio_devices_t availableDeviceTypes = mAvailableInputDevices.types() & ~AUDIO_DEVICE_BIT_IN;
4830    audio_devices_t selectedDeviceFromMix =
4831           mPolicyMixes.getDeviceAndMixForInputSource(inputSource, availableDeviceTypes, policyMix);
4832
4833    if (selectedDeviceFromMix != AUDIO_DEVICE_NONE) {
4834        return selectedDeviceFromMix;
4835    }
4836    return getDeviceForInputSource(inputSource);
4837}
4838
4839audio_devices_t AudioPolicyManager::getDeviceForInputSource(audio_source_t inputSource)
4840{
4841    for (size_t routeIndex = 0; routeIndex < mInputRoutes.size(); routeIndex++) {
4842         sp<SessionRoute> route = mInputRoutes.valueAt(routeIndex);
4843         if (inputSource == route->mSource && route->isActive()) {
4844             return route->mDeviceDescriptor->type();
4845         }
4846     }
4847
4848     return mEngine->getDeviceForInputSource(inputSource);
4849}
4850
4851float AudioPolicyManager::computeVolume(audio_stream_type_t stream,
4852                                        int index,
4853                                        audio_devices_t device)
4854{
4855    float volumeDb = mVolumeCurves->volIndexToDb(stream, Volume::getDeviceCategory(device), index);
4856    // if a headset is connected, apply the following rules to ring tones and notifications
4857    // to avoid sound level bursts in user's ears:
4858    // - always attenuate ring tones and notifications volume by 6dB
4859    // - if music is playing, always limit the volume to current music volume,
4860    // with a minimum threshold at -36dB so that notification is always perceived.
4861    const routing_strategy stream_strategy = getStrategy(stream);
4862    if ((device & (AUDIO_DEVICE_OUT_BLUETOOTH_A2DP |
4863            AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES |
4864            AUDIO_DEVICE_OUT_WIRED_HEADSET |
4865            AUDIO_DEVICE_OUT_WIRED_HEADPHONE)) &&
4866        ((stream_strategy == STRATEGY_SONIFICATION)
4867                || (stream_strategy == STRATEGY_SONIFICATION_RESPECTFUL)
4868                || (stream == AUDIO_STREAM_SYSTEM)
4869                || ((stream_strategy == STRATEGY_ENFORCED_AUDIBLE) &&
4870                    (mEngine->getForceUse(AUDIO_POLICY_FORCE_FOR_SYSTEM) == AUDIO_POLICY_FORCE_NONE))) &&
4871            mVolumeCurves->canBeMuted(stream)) {
4872        volumeDb += SONIFICATION_HEADSET_VOLUME_FACTOR_DB;
4873        // when the phone is ringing we must consider that music could have been paused just before
4874        // by the music application and behave as if music was active if the last music track was
4875        // just stopped
4876        if (isStreamActive(AUDIO_STREAM_MUSIC, SONIFICATION_HEADSET_MUSIC_DELAY) ||
4877                mLimitRingtoneVolume) {
4878            audio_devices_t musicDevice = getDeviceForStrategy(STRATEGY_MEDIA, true /*fromCache*/);
4879            float musicVolDB = computeVolume(AUDIO_STREAM_MUSIC,
4880                                             mVolumeCurves->getVolumeIndex(AUDIO_STREAM_MUSIC,
4881                                                                              musicDevice),
4882                                             musicDevice);
4883            float minVolDB = (musicVolDB > SONIFICATION_HEADSET_VOLUME_MIN_DB) ?
4884                    musicVolDB : SONIFICATION_HEADSET_VOLUME_MIN_DB;
4885            if (volumeDb > minVolDB) {
4886                volumeDb = minVolDB;
4887                ALOGV("computeVolume limiting volume to %f musicVol %f", minVolDB, musicVolDB);
4888            }
4889        }
4890    }
4891
4892    return volumeDb;
4893}
4894
4895status_t AudioPolicyManager::checkAndSetVolume(audio_stream_type_t stream,
4896                                                   int index,
4897                                                   const sp<AudioOutputDescriptor>& outputDesc,
4898                                                   audio_devices_t device,
4899                                                   int delayMs,
4900                                                   bool force)
4901{
4902    // do not change actual stream volume if the stream is muted
4903    if (outputDesc->mMuteCount[stream] != 0) {
4904        ALOGVV("checkAndSetVolume() stream %d muted count %d",
4905              stream, outputDesc->mMuteCount[stream]);
4906        return NO_ERROR;
4907    }
4908    audio_policy_forced_cfg_t forceUseForComm =
4909            mEngine->getForceUse(AUDIO_POLICY_FORCE_FOR_COMMUNICATION);
4910    // do not change in call volume if bluetooth is connected and vice versa
4911    if ((stream == AUDIO_STREAM_VOICE_CALL && forceUseForComm == AUDIO_POLICY_FORCE_BT_SCO) ||
4912        (stream == AUDIO_STREAM_BLUETOOTH_SCO && forceUseForComm != AUDIO_POLICY_FORCE_BT_SCO)) {
4913        ALOGV("checkAndSetVolume() cannot set stream %d volume with force use = %d for comm",
4914             stream, forceUseForComm);
4915        return INVALID_OPERATION;
4916    }
4917
4918    if (device == AUDIO_DEVICE_NONE) {
4919        device = outputDesc->device();
4920    }
4921
4922    float volumeDb = computeVolume(stream, index, device);
4923    if (outputDesc->isFixedVolume(device)) {
4924        volumeDb = 0.0f;
4925    }
4926
4927    outputDesc->setVolume(volumeDb, stream, device, delayMs, force);
4928
4929    if (stream == AUDIO_STREAM_VOICE_CALL ||
4930        stream == AUDIO_STREAM_BLUETOOTH_SCO) {
4931        float voiceVolume;
4932        // Force voice volume to max for bluetooth SCO as volume is managed by the headset
4933        if (stream == AUDIO_STREAM_VOICE_CALL) {
4934            voiceVolume = (float)index/(float)mVolumeCurves->getVolumeIndexMax(stream);
4935        } else {
4936            voiceVolume = 1.0;
4937        }
4938
4939        if (voiceVolume != mLastVoiceVolume && outputDesc == mPrimaryOutput) {
4940            mpClientInterface->setVoiceVolume(voiceVolume, delayMs);
4941            mLastVoiceVolume = voiceVolume;
4942        }
4943    }
4944
4945    return NO_ERROR;
4946}
4947
4948void AudioPolicyManager::applyStreamVolumes(const sp<AudioOutputDescriptor>& outputDesc,
4949                                                audio_devices_t device,
4950                                                int delayMs,
4951                                                bool force)
4952{
4953    ALOGVV("applyStreamVolumes() for device %08x", device);
4954
4955    for (int stream = 0; stream < AUDIO_STREAM_FOR_POLICY_CNT; stream++) {
4956        checkAndSetVolume((audio_stream_type_t)stream,
4957                          mVolumeCurves->getVolumeIndex((audio_stream_type_t)stream, device),
4958                          outputDesc,
4959                          device,
4960                          delayMs,
4961                          force);
4962    }
4963}
4964
4965void AudioPolicyManager::setStrategyMute(routing_strategy strategy,
4966                                             bool on,
4967                                             const sp<AudioOutputDescriptor>& outputDesc,
4968                                             int delayMs,
4969                                             audio_devices_t device)
4970{
4971    ALOGVV("setStrategyMute() strategy %d, mute %d, output ID %d",
4972           strategy, on, outputDesc->getId());
4973    for (int stream = 0; stream < AUDIO_STREAM_FOR_POLICY_CNT; stream++) {
4974        if (getStrategy((audio_stream_type_t)stream) == strategy) {
4975            setStreamMute((audio_stream_type_t)stream, on, outputDesc, delayMs, device);
4976        }
4977    }
4978}
4979
4980void AudioPolicyManager::setStreamMute(audio_stream_type_t stream,
4981                                           bool on,
4982                                           const sp<AudioOutputDescriptor>& outputDesc,
4983                                           int delayMs,
4984                                           audio_devices_t device)
4985{
4986    if (device == AUDIO_DEVICE_NONE) {
4987        device = outputDesc->device();
4988    }
4989
4990    ALOGVV("setStreamMute() stream %d, mute %d, mMuteCount %d device %04x",
4991          stream, on, outputDesc->mMuteCount[stream], device);
4992
4993    if (on) {
4994        if (outputDesc->mMuteCount[stream] == 0) {
4995            if (mVolumeCurves->canBeMuted(stream) &&
4996                    ((stream != AUDIO_STREAM_ENFORCED_AUDIBLE) ||
4997                     (mEngine->getForceUse(AUDIO_POLICY_FORCE_FOR_SYSTEM) == AUDIO_POLICY_FORCE_NONE))) {
4998                checkAndSetVolume(stream, 0, outputDesc, device, delayMs);
4999            }
5000        }
5001        // increment mMuteCount after calling checkAndSetVolume() so that volume change is not ignored
5002        outputDesc->mMuteCount[stream]++;
5003    } else {
5004        if (outputDesc->mMuteCount[stream] == 0) {
5005            ALOGV("setStreamMute() unmuting non muted stream!");
5006            return;
5007        }
5008        if (--outputDesc->mMuteCount[stream] == 0) {
5009            checkAndSetVolume(stream,
5010                              mVolumeCurves->getVolumeIndex(stream, device),
5011                              outputDesc,
5012                              device,
5013                              delayMs);
5014        }
5015    }
5016}
5017
5018void AudioPolicyManager::handleIncallSonification(audio_stream_type_t stream,
5019                                                      bool starting, bool stateChange)
5020{
5021    if(!hasPrimaryOutput()) {
5022        return;
5023    }
5024
5025    // if the stream pertains to sonification strategy and we are in call we must
5026    // mute the stream if it is low visibility. If it is high visibility, we must play a tone
5027    // in the device used for phone strategy and play the tone if the selected device does not
5028    // interfere with the device used for phone strategy
5029    // if stateChange is true, we are called from setPhoneState() and we must mute or unmute as
5030    // many times as there are active tracks on the output
5031    const routing_strategy stream_strategy = getStrategy(stream);
5032    if ((stream_strategy == STRATEGY_SONIFICATION) ||
5033            ((stream_strategy == STRATEGY_SONIFICATION_RESPECTFUL))) {
5034        sp<SwAudioOutputDescriptor> outputDesc = mPrimaryOutput;
5035        ALOGV("handleIncallSonification() stream %d starting %d device %x stateChange %d",
5036                stream, starting, outputDesc->mDevice, stateChange);
5037        if (outputDesc->mRefCount[stream]) {
5038            int muteCount = 1;
5039            if (stateChange) {
5040                muteCount = outputDesc->mRefCount[stream];
5041            }
5042            if (audio_is_low_visibility(stream)) {
5043                ALOGV("handleIncallSonification() low visibility, muteCount %d", muteCount);
5044                for (int i = 0; i < muteCount; i++) {
5045                    setStreamMute(stream, starting, mPrimaryOutput);
5046                }
5047            } else {
5048                ALOGV("handleIncallSonification() high visibility");
5049                if (outputDesc->device() &
5050                        getDeviceForStrategy(STRATEGY_PHONE, true /*fromCache*/)) {
5051                    ALOGV("handleIncallSonification() high visibility muted, muteCount %d", muteCount);
5052                    for (int i = 0; i < muteCount; i++) {
5053                        setStreamMute(stream, starting, mPrimaryOutput);
5054                    }
5055                }
5056                if (starting) {
5057                    mpClientInterface->startTone(AUDIO_POLICY_TONE_IN_CALL_NOTIFICATION,
5058                                                 AUDIO_STREAM_VOICE_CALL);
5059                } else {
5060                    mpClientInterface->stopTone();
5061                }
5062            }
5063        }
5064    }
5065}
5066
5067audio_stream_type_t AudioPolicyManager::streamTypefromAttributesInt(const audio_attributes_t *attr)
5068{
5069    // flags to stream type mapping
5070    if ((attr->flags & AUDIO_FLAG_AUDIBILITY_ENFORCED) == AUDIO_FLAG_AUDIBILITY_ENFORCED) {
5071        return AUDIO_STREAM_ENFORCED_AUDIBLE;
5072    }
5073    if ((attr->flags & AUDIO_FLAG_SCO) == AUDIO_FLAG_SCO) {
5074        return AUDIO_STREAM_BLUETOOTH_SCO;
5075    }
5076    if ((attr->flags & AUDIO_FLAG_BEACON) == AUDIO_FLAG_BEACON) {
5077        return AUDIO_STREAM_TTS;
5078    }
5079
5080    // usage to stream type mapping
5081    switch (attr->usage) {
5082    case AUDIO_USAGE_MEDIA:
5083    case AUDIO_USAGE_GAME:
5084    case AUDIO_USAGE_ASSISTANCE_NAVIGATION_GUIDANCE:
5085        return AUDIO_STREAM_MUSIC;
5086    case AUDIO_USAGE_ASSISTANCE_ACCESSIBILITY:
5087        return AUDIO_STREAM_ACCESSIBILITY;
5088    case AUDIO_USAGE_ASSISTANCE_SONIFICATION:
5089        return AUDIO_STREAM_SYSTEM;
5090    case AUDIO_USAGE_VOICE_COMMUNICATION:
5091        return AUDIO_STREAM_VOICE_CALL;
5092
5093    case AUDIO_USAGE_VOICE_COMMUNICATION_SIGNALLING:
5094        return AUDIO_STREAM_DTMF;
5095
5096    case AUDIO_USAGE_ALARM:
5097        return AUDIO_STREAM_ALARM;
5098    case AUDIO_USAGE_NOTIFICATION_TELEPHONY_RINGTONE:
5099        return AUDIO_STREAM_RING;
5100
5101    case AUDIO_USAGE_NOTIFICATION:
5102    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_REQUEST:
5103    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_INSTANT:
5104    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_DELAYED:
5105    case AUDIO_USAGE_NOTIFICATION_EVENT:
5106        return AUDIO_STREAM_NOTIFICATION;
5107
5108    case AUDIO_USAGE_UNKNOWN:
5109    default:
5110        return AUDIO_STREAM_MUSIC;
5111    }
5112}
5113
5114bool AudioPolicyManager::isValidAttributes(const audio_attributes_t *paa)
5115{
5116    // has flags that map to a strategy?
5117    if ((paa->flags & (AUDIO_FLAG_AUDIBILITY_ENFORCED | AUDIO_FLAG_SCO | AUDIO_FLAG_BEACON)) != 0) {
5118        return true;
5119    }
5120
5121    // has known usage?
5122    switch (paa->usage) {
5123    case AUDIO_USAGE_UNKNOWN:
5124    case AUDIO_USAGE_MEDIA:
5125    case AUDIO_USAGE_VOICE_COMMUNICATION:
5126    case AUDIO_USAGE_VOICE_COMMUNICATION_SIGNALLING:
5127    case AUDIO_USAGE_ALARM:
5128    case AUDIO_USAGE_NOTIFICATION:
5129    case AUDIO_USAGE_NOTIFICATION_TELEPHONY_RINGTONE:
5130    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_REQUEST:
5131    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_INSTANT:
5132    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_DELAYED:
5133    case AUDIO_USAGE_NOTIFICATION_EVENT:
5134    case AUDIO_USAGE_ASSISTANCE_ACCESSIBILITY:
5135    case AUDIO_USAGE_ASSISTANCE_NAVIGATION_GUIDANCE:
5136    case AUDIO_USAGE_ASSISTANCE_SONIFICATION:
5137    case AUDIO_USAGE_GAME:
5138    case AUDIO_USAGE_VIRTUAL_SOURCE:
5139        break;
5140    default:
5141        return false;
5142    }
5143    return true;
5144}
5145
5146bool AudioPolicyManager::isStrategyActive(const sp<AudioOutputDescriptor> outputDesc,
5147                                          routing_strategy strategy, uint32_t inPastMs,
5148                                          nsecs_t sysTime) const
5149{
5150    if ((sysTime == 0) && (inPastMs != 0)) {
5151        sysTime = systemTime();
5152    }
5153    for (int i = 0; i < (int)AUDIO_STREAM_FOR_POLICY_CNT; i++) {
5154        if (((getStrategy((audio_stream_type_t)i) == strategy) ||
5155                (NUM_STRATEGIES == strategy)) &&
5156                outputDesc->isStreamActive((audio_stream_type_t)i, inPastMs, sysTime)) {
5157            return true;
5158        }
5159    }
5160    return false;
5161}
5162
5163audio_policy_forced_cfg_t AudioPolicyManager::getForceUse(audio_policy_force_use_t usage)
5164{
5165    return mEngine->getForceUse(usage);
5166}
5167
5168bool AudioPolicyManager::isInCall()
5169{
5170    return isStateInCall(mEngine->getPhoneState());
5171}
5172
5173bool AudioPolicyManager::isStateInCall(int state)
5174{
5175    return is_state_in_call(state);
5176}
5177
5178void AudioPolicyManager::cleanUpForDevice(const sp<DeviceDescriptor>& deviceDesc)
5179{
5180    for (ssize_t i = (ssize_t)mAudioSources.size() - 1; i >= 0; i--)  {
5181        sp<AudioSourceDescriptor> sourceDesc = mAudioSources.valueAt(i);
5182        if (sourceDesc->mDevice->equals(deviceDesc)) {
5183            ALOGV("%s releasing audio source %d", __FUNCTION__, sourceDesc->getHandle());
5184            stopAudioSource(sourceDesc->getHandle());
5185        }
5186    }
5187
5188    for (ssize_t i = (ssize_t)mAudioPatches.size() - 1; i >= 0; i--)  {
5189        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(i);
5190        bool release = false;
5191        for (size_t j = 0; j < patchDesc->mPatch.num_sources && !release; j++)  {
5192            const struct audio_port_config *source = &patchDesc->mPatch.sources[j];
5193            if (source->type == AUDIO_PORT_TYPE_DEVICE &&
5194                    source->ext.device.type == deviceDesc->type()) {
5195                release = true;
5196            }
5197        }
5198        for (size_t j = 0; j < patchDesc->mPatch.num_sinks && !release; j++)  {
5199            const struct audio_port_config *sink = &patchDesc->mPatch.sinks[j];
5200            if (sink->type == AUDIO_PORT_TYPE_DEVICE &&
5201                    sink->ext.device.type == deviceDesc->type()) {
5202                release = true;
5203            }
5204        }
5205        if (release) {
5206            ALOGV("%s releasing patch %u", __FUNCTION__, patchDesc->mHandle);
5207            releaseAudioPatch(patchDesc->mHandle, patchDesc->mUid);
5208        }
5209    }
5210}
5211
5212// Modify the list of surround sound formats supported.
5213void AudioPolicyManager::filterSurroundFormats(FormatVector &formats) {
5214
5215    audio_policy_forced_cfg_t forceUse = mEngine->getForceUse(
5216            AUDIO_POLICY_FORCE_FOR_ENCODED_SURROUND);
5217    ALOGI("%s: forced use = %d", __FUNCTION__, forceUse);
5218
5219    // Analyze original support for various formats.
5220    bool supportsRawSurround = false;
5221    bool supportsIEC61937 = false;
5222    for (size_t formatIndex = 0; formatIndex < formats.size(); formatIndex++) {
5223        audio_format_t format = formats[formatIndex];
5224        ALOGI("%s: original formats: #%x", __FUNCTION__, format);
5225        switch (format) {
5226            case AUDIO_FORMAT_AC3:
5227            case AUDIO_FORMAT_E_AC3:
5228            case AUDIO_FORMAT_DTS:
5229            case AUDIO_FORMAT_DTS_HD:
5230                supportsRawSurround = true;
5231                break;
5232            case AUDIO_FORMAT_IEC61937:
5233                supportsIEC61937 = true;
5234                break;
5235            default:
5236                break;
5237        }
5238    }
5239    ALOGI("%s: supportsRawSurround = %d, supportsIEC61937 = %d",
5240            __FUNCTION__, supportsRawSurround, supportsIEC61937);
5241
5242    // Modify formats based on surround preferences.
5243    // If NEVER, remove support for surround formats.
5244    if ((forceUse == AUDIO_POLICY_FORCE_ENCODED_SURROUND_NEVER)
5245            && (supportsRawSurround || supportsIEC61937)) {
5246        // Remove surround sound related formats.
5247        for (size_t formatIndex = 0; formatIndex < formats.size(); ) {
5248            audio_format_t format = formats[formatIndex];
5249            switch(format) {
5250                case AUDIO_FORMAT_AC3:
5251                case AUDIO_FORMAT_E_AC3:
5252                case AUDIO_FORMAT_DTS:
5253                case AUDIO_FORMAT_DTS_HD:
5254                case AUDIO_FORMAT_IEC61937:
5255                    ALOGI("%s: remove #%x", __FUNCTION__, format);
5256                    formats.removeAt(formatIndex);
5257                    break;
5258                default:
5259                    formatIndex++; // keep it
5260                    break;
5261            }
5262        }
5263        supportsRawSurround = false;
5264        supportsIEC61937 = false;
5265    }
5266    // If ALWAYS, add support for raw surround formats if all are missing.
5267    // This assumes that if any of these formats are reported by the HAL
5268    // then the report is valid and should not be modified.
5269    if ((forceUse == AUDIO_POLICY_FORCE_ENCODED_SURROUND_ALWAYS)
5270            && !supportsRawSurround) {
5271        formats.add(AUDIO_FORMAT_AC3);
5272        formats.add(AUDIO_FORMAT_E_AC3);
5273        formats.add(AUDIO_FORMAT_DTS);
5274        formats.add(AUDIO_FORMAT_DTS_HD);
5275        supportsRawSurround = true;
5276    }
5277    // Add support for IEC61937 if raw surround supported.
5278    // The HAL could do this but add it here, just in case.
5279    if (supportsRawSurround && !supportsIEC61937) {
5280        formats.add(AUDIO_FORMAT_IEC61937);
5281        // supportsIEC61937 = true;
5282    }
5283    // Just for debugging.
5284    for (size_t formatIndex = 0; formatIndex < formats.size(); formatIndex++) {
5285        audio_format_t format = formats[formatIndex];
5286        ALOGI("%s: final formats: #%x", __FUNCTION__, format);
5287    }
5288}
5289
5290void AudioPolicyManager::updateAudioProfiles(audio_io_handle_t ioHandle,
5291                                             AudioProfileVector &profiles)
5292{
5293    String8 reply;
5294    char *value;
5295    // Format MUST be checked first to update the list of AudioProfile
5296    if (profiles.hasDynamicFormat()) {
5297        reply = mpClientInterface->getParameters(ioHandle,
5298                                                 String8(AUDIO_PARAMETER_STREAM_SUP_FORMATS));
5299        ALOGI("%s: supported formats %s", __FUNCTION__, reply.string());
5300        AudioParameter repliedParameters(reply);
5301        if (repliedParameters.get(
5302                String8(AUDIO_PARAMETER_STREAM_SUP_FORMATS), reply) != NO_ERROR) {
5303            ALOGE("%s: failed to retrieve format, bailing out", __FUNCTION__);
5304            return;
5305        }
5306        FormatVector formats = formatsFromString(reply.string());
5307        filterSurroundFormats(formats);
5308        profiles.setFormats(formats);
5309    }
5310    const FormatVector &supportedFormats = profiles.getSupportedFormats();
5311
5312    for (size_t formatIndex = 0; formatIndex < supportedFormats.size(); formatIndex++) {
5313        audio_format_t format = supportedFormats[formatIndex];
5314        ChannelsVector channelMasks;
5315        SampleRateVector samplingRates;
5316        AudioParameter requestedParameters;
5317        requestedParameters.addInt(String8(AUDIO_PARAMETER_STREAM_FORMAT), format);
5318
5319        if (profiles.hasDynamicRateFor(format)) {
5320            reply = mpClientInterface->getParameters(ioHandle,
5321                                                     requestedParameters.toString() + ";" +
5322                                                     AUDIO_PARAMETER_STREAM_SUP_SAMPLING_RATES);
5323            ALOGV("%s: supported sampling rates %s", __FUNCTION__, reply.string());
5324            AudioParameter repliedParameters(reply);
5325            if (repliedParameters.get(
5326                    String8(AUDIO_PARAMETER_STREAM_SUP_SAMPLING_RATES), reply) == NO_ERROR) {
5327                samplingRates = samplingRatesFromString(reply.string());
5328            }
5329        }
5330        if (profiles.hasDynamicChannelsFor(format)) {
5331            reply = mpClientInterface->getParameters(ioHandle,
5332                                                     requestedParameters.toString() + ";" +
5333                                                     AUDIO_PARAMETER_STREAM_SUP_CHANNELS);
5334            ALOGV("%s: supported channel masks %s", __FUNCTION__, reply.string());
5335            AudioParameter repliedParameters(reply);
5336            if (repliedParameters.get(
5337                    String8(AUDIO_PARAMETER_STREAM_SUP_CHANNELS), reply) == NO_ERROR) {
5338                channelMasks = channelMasksFromString(reply.string());
5339            }
5340        }
5341        profiles.addProfileFromHal(new AudioProfile(format, channelMasks, samplingRates));
5342    }
5343}
5344
5345}; // namespace android
5346