1/*
2 * Copyright (C) 2006-2007 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 "AudioSystem"
18//#define LOG_NDEBUG 0
19
20#include <utils/Log.h>
21#include <binder/IServiceManager.h>
22#include <media/AudioSystem.h>
23#include <media/IAudioFlinger.h>
24#include <media/IAudioPolicyService.h>
25#include <math.h>
26
27#include <system/audio.h>
28
29// ----------------------------------------------------------------------------
30
31namespace android {
32
33// client singleton for AudioFlinger binder interface
34Mutex AudioSystem::gLock;
35Mutex AudioSystem::gLockAPS;
36sp<IAudioFlinger> AudioSystem::gAudioFlinger;
37sp<AudioSystem::AudioFlingerClient> AudioSystem::gAudioFlingerClient;
38audio_error_callback AudioSystem::gAudioErrorCallback = NULL;
39dynamic_policy_callback AudioSystem::gDynPolicyCallback = NULL;
40record_config_callback  AudioSystem::gRecordConfigCallback = NULL;
41
42
43// establish binder interface to AudioFlinger service
44const sp<IAudioFlinger> AudioSystem::get_audio_flinger()
45{
46    sp<IAudioFlinger> af;
47    sp<AudioFlingerClient> afc;
48    {
49        Mutex::Autolock _l(gLock);
50        if (gAudioFlinger == 0) {
51            sp<IServiceManager> sm = defaultServiceManager();
52            sp<IBinder> binder;
53            do {
54                binder = sm->getService(String16("media.audio_flinger"));
55                if (binder != 0)
56                    break;
57                ALOGW("AudioFlinger not published, waiting...");
58                usleep(500000); // 0.5 s
59            } while (true);
60            if (gAudioFlingerClient == NULL) {
61                gAudioFlingerClient = new AudioFlingerClient();
62            } else {
63                if (gAudioErrorCallback) {
64                    gAudioErrorCallback(NO_ERROR);
65                }
66            }
67            binder->linkToDeath(gAudioFlingerClient);
68            gAudioFlinger = interface_cast<IAudioFlinger>(binder);
69            LOG_ALWAYS_FATAL_IF(gAudioFlinger == 0);
70            afc = gAudioFlingerClient;
71        }
72        af = gAudioFlinger;
73    }
74    if (afc != 0) {
75        af->registerClient(afc);
76    }
77    return af;
78}
79
80const sp<AudioSystem::AudioFlingerClient> AudioSystem::getAudioFlingerClient()
81{
82    // calling get_audio_flinger() will initialize gAudioFlingerClient if needed
83    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
84    if (af == 0) return 0;
85    Mutex::Autolock _l(gLock);
86    return gAudioFlingerClient;
87}
88
89sp<AudioIoDescriptor> AudioSystem::getIoDescriptor(audio_io_handle_t ioHandle)
90{
91    sp<AudioIoDescriptor> desc;
92    const sp<AudioFlingerClient> afc = getAudioFlingerClient();
93    if (afc != 0) {
94        desc = afc->getIoDescriptor(ioHandle);
95    }
96    return desc;
97}
98
99/* static */ status_t AudioSystem::checkAudioFlinger()
100{
101    if (defaultServiceManager()->checkService(String16("media.audio_flinger")) != 0) {
102        return NO_ERROR;
103    }
104    return DEAD_OBJECT;
105}
106
107// FIXME Declare in binder opcode order, similarly to IAudioFlinger.h and IAudioFlinger.cpp
108
109status_t AudioSystem::muteMicrophone(bool state)
110{
111    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
112    if (af == 0) return PERMISSION_DENIED;
113    return af->setMicMute(state);
114}
115
116status_t AudioSystem::isMicrophoneMuted(bool* state)
117{
118    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
119    if (af == 0) return PERMISSION_DENIED;
120    *state = af->getMicMute();
121    return NO_ERROR;
122}
123
124status_t AudioSystem::setMasterVolume(float value)
125{
126    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
127    if (af == 0) return PERMISSION_DENIED;
128    af->setMasterVolume(value);
129    return NO_ERROR;
130}
131
132status_t AudioSystem::setMasterMute(bool mute)
133{
134    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
135    if (af == 0) return PERMISSION_DENIED;
136    af->setMasterMute(mute);
137    return NO_ERROR;
138}
139
140status_t AudioSystem::getMasterVolume(float* volume)
141{
142    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
143    if (af == 0) return PERMISSION_DENIED;
144    *volume = af->masterVolume();
145    return NO_ERROR;
146}
147
148status_t AudioSystem::getMasterMute(bool* mute)
149{
150    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
151    if (af == 0) return PERMISSION_DENIED;
152    *mute = af->masterMute();
153    return NO_ERROR;
154}
155
156status_t AudioSystem::setStreamVolume(audio_stream_type_t stream, float value,
157        audio_io_handle_t output)
158{
159    if (uint32_t(stream) >= AUDIO_STREAM_CNT) return BAD_VALUE;
160    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
161    if (af == 0) return PERMISSION_DENIED;
162    af->setStreamVolume(stream, value, output);
163    return NO_ERROR;
164}
165
166status_t AudioSystem::setStreamMute(audio_stream_type_t stream, bool mute)
167{
168    if (uint32_t(stream) >= AUDIO_STREAM_CNT) return BAD_VALUE;
169    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
170    if (af == 0) return PERMISSION_DENIED;
171    af->setStreamMute(stream, mute);
172    return NO_ERROR;
173}
174
175status_t AudioSystem::getStreamVolume(audio_stream_type_t stream, float* volume,
176        audio_io_handle_t output)
177{
178    if (uint32_t(stream) >= AUDIO_STREAM_CNT) return BAD_VALUE;
179    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
180    if (af == 0) return PERMISSION_DENIED;
181    *volume = af->streamVolume(stream, output);
182    return NO_ERROR;
183}
184
185status_t AudioSystem::getStreamMute(audio_stream_type_t stream, bool* mute)
186{
187    if (uint32_t(stream) >= AUDIO_STREAM_CNT) return BAD_VALUE;
188    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
189    if (af == 0) return PERMISSION_DENIED;
190    *mute = af->streamMute(stream);
191    return NO_ERROR;
192}
193
194status_t AudioSystem::setMode(audio_mode_t mode)
195{
196    if (uint32_t(mode) >= AUDIO_MODE_CNT) return BAD_VALUE;
197    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
198    if (af == 0) return PERMISSION_DENIED;
199    return af->setMode(mode);
200}
201
202status_t AudioSystem::setParameters(audio_io_handle_t ioHandle, const String8& keyValuePairs)
203{
204    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
205    if (af == 0) return PERMISSION_DENIED;
206    return af->setParameters(ioHandle, keyValuePairs);
207}
208
209String8 AudioSystem::getParameters(audio_io_handle_t ioHandle, const String8& keys)
210{
211    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
212    String8 result = String8("");
213    if (af == 0) return result;
214
215    result = af->getParameters(ioHandle, keys);
216    return result;
217}
218
219status_t AudioSystem::setParameters(const String8& keyValuePairs)
220{
221    return setParameters(AUDIO_IO_HANDLE_NONE, keyValuePairs);
222}
223
224String8 AudioSystem::getParameters(const String8& keys)
225{
226    return getParameters(AUDIO_IO_HANDLE_NONE, keys);
227}
228
229// convert volume steps to natural log scale
230
231// change this value to change volume scaling
232static const float dBPerStep = 0.5f;
233// shouldn't need to touch these
234static const float dBConvert = -dBPerStep * 2.302585093f / 20.0f;
235static const float dBConvertInverse = 1.0f / dBConvert;
236
237float AudioSystem::linearToLog(int volume)
238{
239    // float v = volume ? exp(float(100 - volume) * dBConvert) : 0;
240    // ALOGD("linearToLog(%d)=%f", volume, v);
241    // return v;
242    return volume ? exp(float(100 - volume) * dBConvert) : 0;
243}
244
245int AudioSystem::logToLinear(float volume)
246{
247    // int v = volume ? 100 - int(dBConvertInverse * log(volume) + 0.5) : 0;
248    // ALOGD("logTolinear(%d)=%f", v, volume);
249    // return v;
250    return volume ? 100 - int(dBConvertInverse * log(volume) + 0.5) : 0;
251}
252
253status_t AudioSystem::getOutputSamplingRate(uint32_t* samplingRate, audio_stream_type_t streamType)
254{
255    audio_io_handle_t output;
256
257    if (streamType == AUDIO_STREAM_DEFAULT) {
258        streamType = AUDIO_STREAM_MUSIC;
259    }
260
261    output = getOutput(streamType);
262    if (output == 0) {
263        return PERMISSION_DENIED;
264    }
265
266    return getSamplingRate(output, samplingRate);
267}
268
269status_t AudioSystem::getSamplingRate(audio_io_handle_t ioHandle,
270                                      uint32_t* samplingRate)
271{
272    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
273    if (af == 0) return PERMISSION_DENIED;
274    sp<AudioIoDescriptor> desc = getIoDescriptor(ioHandle);
275    if (desc == 0) {
276        *samplingRate = af->sampleRate(ioHandle);
277    } else {
278        *samplingRate = desc->mSamplingRate;
279    }
280    if (*samplingRate == 0) {
281        ALOGE("AudioSystem::getSamplingRate failed for ioHandle %d", ioHandle);
282        return BAD_VALUE;
283    }
284
285    ALOGV("getSamplingRate() ioHandle %d, sampling rate %u", ioHandle, *samplingRate);
286
287    return NO_ERROR;
288}
289
290status_t AudioSystem::getOutputFrameCount(size_t* frameCount, audio_stream_type_t streamType)
291{
292    audio_io_handle_t output;
293
294    if (streamType == AUDIO_STREAM_DEFAULT) {
295        streamType = AUDIO_STREAM_MUSIC;
296    }
297
298    output = getOutput(streamType);
299    if (output == AUDIO_IO_HANDLE_NONE) {
300        return PERMISSION_DENIED;
301    }
302
303    return getFrameCount(output, frameCount);
304}
305
306status_t AudioSystem::getFrameCount(audio_io_handle_t ioHandle,
307                                    size_t* frameCount)
308{
309    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
310    if (af == 0) return PERMISSION_DENIED;
311    sp<AudioIoDescriptor> desc = getIoDescriptor(ioHandle);
312    if (desc == 0) {
313        *frameCount = af->frameCount(ioHandle);
314    } else {
315        *frameCount = desc->mFrameCount;
316    }
317    if (*frameCount == 0) {
318        ALOGE("AudioSystem::getFrameCount failed for ioHandle %d", ioHandle);
319        return BAD_VALUE;
320    }
321
322    ALOGV("getFrameCount() ioHandle %d, frameCount %zu", ioHandle, *frameCount);
323
324    return NO_ERROR;
325}
326
327status_t AudioSystem::getOutputLatency(uint32_t* latency, audio_stream_type_t streamType)
328{
329    audio_io_handle_t output;
330
331    if (streamType == AUDIO_STREAM_DEFAULT) {
332        streamType = AUDIO_STREAM_MUSIC;
333    }
334
335    output = getOutput(streamType);
336    if (output == AUDIO_IO_HANDLE_NONE) {
337        return PERMISSION_DENIED;
338    }
339
340    return getLatency(output, latency);
341}
342
343status_t AudioSystem::getLatency(audio_io_handle_t output,
344                                 uint32_t* latency)
345{
346    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
347    if (af == 0) return PERMISSION_DENIED;
348    sp<AudioIoDescriptor> outputDesc = getIoDescriptor(output);
349    if (outputDesc == 0) {
350        *latency = af->latency(output);
351    } else {
352        *latency = outputDesc->mLatency;
353    }
354
355    ALOGV("getLatency() output %d, latency %d", output, *latency);
356
357    return NO_ERROR;
358}
359
360status_t AudioSystem::getInputBufferSize(uint32_t sampleRate, audio_format_t format,
361        audio_channel_mask_t channelMask, size_t* buffSize)
362{
363    const sp<AudioFlingerClient> afc = getAudioFlingerClient();
364    if (afc == 0) {
365        return NO_INIT;
366    }
367    return afc->getInputBufferSize(sampleRate, format, channelMask, buffSize);
368}
369
370status_t AudioSystem::setVoiceVolume(float value)
371{
372    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
373    if (af == 0) return PERMISSION_DENIED;
374    return af->setVoiceVolume(value);
375}
376
377status_t AudioSystem::getRenderPosition(audio_io_handle_t output, uint32_t *halFrames,
378                                        uint32_t *dspFrames)
379{
380    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
381    if (af == 0) return PERMISSION_DENIED;
382
383    return af->getRenderPosition(halFrames, dspFrames, output);
384}
385
386uint32_t AudioSystem::getInputFramesLost(audio_io_handle_t ioHandle)
387{
388    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
389    uint32_t result = 0;
390    if (af == 0) return result;
391    if (ioHandle == AUDIO_IO_HANDLE_NONE) return result;
392
393    result = af->getInputFramesLost(ioHandle);
394    return result;
395}
396
397audio_unique_id_t AudioSystem::newAudioUniqueId(audio_unique_id_use_t use)
398{
399    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
400    if (af == 0) return AUDIO_UNIQUE_ID_ALLOCATE;
401    return af->newAudioUniqueId(use);
402}
403
404void AudioSystem::acquireAudioSessionId(audio_session_t audioSession, pid_t pid)
405{
406    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
407    if (af != 0) {
408        af->acquireAudioSessionId(audioSession, pid);
409    }
410}
411
412void AudioSystem::releaseAudioSessionId(audio_session_t audioSession, pid_t pid)
413{
414    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
415    if (af != 0) {
416        af->releaseAudioSessionId(audioSession, pid);
417    }
418}
419
420audio_hw_sync_t AudioSystem::getAudioHwSyncForSession(audio_session_t sessionId)
421{
422    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
423    if (af == 0) return AUDIO_HW_SYNC_INVALID;
424    return af->getAudioHwSyncForSession(sessionId);
425}
426
427status_t AudioSystem::systemReady()
428{
429    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
430    if (af == 0) return NO_INIT;
431    return af->systemReady();
432}
433
434status_t AudioSystem::getFrameCountHAL(audio_io_handle_t ioHandle,
435                                       size_t* frameCount)
436{
437    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
438    if (af == 0) return PERMISSION_DENIED;
439    sp<AudioIoDescriptor> desc = getIoDescriptor(ioHandle);
440    if (desc == 0) {
441        *frameCount = af->frameCountHAL(ioHandle);
442    } else {
443        *frameCount = desc->mFrameCountHAL;
444    }
445    if (*frameCount == 0) {
446        ALOGE("AudioSystem::getFrameCountHAL failed for ioHandle %d", ioHandle);
447        return BAD_VALUE;
448    }
449
450    ALOGV("getFrameCountHAL() ioHandle %d, frameCount %zu", ioHandle, *frameCount);
451
452    return NO_ERROR;
453}
454
455// ---------------------------------------------------------------------------
456
457
458void AudioSystem::AudioFlingerClient::clearIoCache()
459{
460    Mutex::Autolock _l(mLock);
461    mIoDescriptors.clear();
462    mInBuffSize = 0;
463    mInSamplingRate = 0;
464    mInFormat = AUDIO_FORMAT_DEFAULT;
465    mInChannelMask = AUDIO_CHANNEL_NONE;
466}
467
468void AudioSystem::AudioFlingerClient::binderDied(const wp<IBinder>& who __unused)
469{
470    audio_error_callback cb = NULL;
471    {
472        Mutex::Autolock _l(AudioSystem::gLock);
473        AudioSystem::gAudioFlinger.clear();
474        cb = gAudioErrorCallback;
475    }
476
477    // clear output handles and stream to output map caches
478    clearIoCache();
479
480    if (cb) {
481        cb(DEAD_OBJECT);
482    }
483    ALOGW("AudioFlinger server died!");
484}
485
486void AudioSystem::AudioFlingerClient::ioConfigChanged(audio_io_config_event event,
487                                                      const sp<AudioIoDescriptor>& ioDesc) {
488    ALOGV("ioConfigChanged() event %d", event);
489
490    if (ioDesc == 0 || ioDesc->mIoHandle == AUDIO_IO_HANDLE_NONE) return;
491
492    audio_port_handle_t deviceId = AUDIO_PORT_HANDLE_NONE;
493    Vector < sp<AudioDeviceCallback> > callbacks;
494
495    {
496        Mutex::Autolock _l(mLock);
497
498        switch (event) {
499        case AUDIO_OUTPUT_OPENED:
500        case AUDIO_INPUT_OPENED: {
501            sp<AudioIoDescriptor> oldDesc = getIoDescriptor_l(ioDesc->mIoHandle);
502            if (oldDesc == 0) {
503                mIoDescriptors.add(ioDesc->mIoHandle, ioDesc);
504            } else {
505                deviceId = oldDesc->getDeviceId();
506                mIoDescriptors.replaceValueFor(ioDesc->mIoHandle, ioDesc);
507            }
508
509            if (ioDesc->getDeviceId() != AUDIO_PORT_HANDLE_NONE) {
510                deviceId = ioDesc->getDeviceId();
511                ssize_t ioIndex = mAudioDeviceCallbacks.indexOfKey(ioDesc->mIoHandle);
512                if (ioIndex >= 0) {
513                    callbacks = mAudioDeviceCallbacks.valueAt(ioIndex);
514                }
515            }
516            ALOGV("ioConfigChanged() new %s opened %d samplingRate %u, format %#x channel mask %#x "
517                    "frameCount %zu deviceId %d", event == AUDIO_OUTPUT_OPENED ? "output" : "input",
518                    ioDesc->mIoHandle, ioDesc->mSamplingRate, ioDesc->mFormat, ioDesc->mChannelMask,
519                    ioDesc->mFrameCount, ioDesc->getDeviceId());
520            } break;
521        case AUDIO_OUTPUT_CLOSED:
522        case AUDIO_INPUT_CLOSED: {
523            if (getIoDescriptor_l(ioDesc->mIoHandle) == 0) {
524                ALOGW("ioConfigChanged() closing unknown %s %d",
525                      event == AUDIO_OUTPUT_CLOSED ? "output" : "input", ioDesc->mIoHandle);
526                break;
527            }
528            ALOGV("ioConfigChanged() %s %d closed",
529                  event == AUDIO_OUTPUT_CLOSED ? "output" : "input", ioDesc->mIoHandle);
530
531            mIoDescriptors.removeItem(ioDesc->mIoHandle);
532            mAudioDeviceCallbacks.removeItem(ioDesc->mIoHandle);
533            } break;
534
535        case AUDIO_OUTPUT_CONFIG_CHANGED:
536        case AUDIO_INPUT_CONFIG_CHANGED: {
537            sp<AudioIoDescriptor> oldDesc = getIoDescriptor_l(ioDesc->mIoHandle);
538            if (oldDesc == 0) {
539                ALOGW("ioConfigChanged() modifying unknown output! %d", ioDesc->mIoHandle);
540                break;
541            }
542
543            deviceId = oldDesc->getDeviceId();
544            mIoDescriptors.replaceValueFor(ioDesc->mIoHandle, ioDesc);
545
546            if (deviceId != ioDesc->getDeviceId()) {
547                deviceId = ioDesc->getDeviceId();
548                ssize_t ioIndex = mAudioDeviceCallbacks.indexOfKey(ioDesc->mIoHandle);
549                if (ioIndex >= 0) {
550                    callbacks = mAudioDeviceCallbacks.valueAt(ioIndex);
551                }
552            }
553            ALOGV("ioConfigChanged() new config for %s %d samplingRate %u, format %#x "
554                    "channel mask %#x frameCount %zu frameCountHAL %zu deviceId %d",
555                    event == AUDIO_OUTPUT_CONFIG_CHANGED ? "output" : "input",
556                    ioDesc->mIoHandle, ioDesc->mSamplingRate, ioDesc->mFormat,
557                    ioDesc->mChannelMask, ioDesc->mFrameCount, ioDesc->mFrameCountHAL, ioDesc->getDeviceId());
558
559        } break;
560        }
561    }
562    // callbacks.size() != 0 =>  ioDesc->mIoHandle and deviceId are valid
563    for (size_t i = 0; i < callbacks.size(); i++) {
564        callbacks[i]->onAudioDeviceUpdate(ioDesc->mIoHandle, deviceId);
565    }
566}
567
568status_t AudioSystem::AudioFlingerClient::getInputBufferSize(
569                                                uint32_t sampleRate, audio_format_t format,
570                                                audio_channel_mask_t channelMask, size_t* buffSize)
571{
572    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
573    if (af == 0) {
574        return PERMISSION_DENIED;
575    }
576    Mutex::Autolock _l(mLock);
577    // Do we have a stale mInBuffSize or are we requesting the input buffer size for new values
578    if ((mInBuffSize == 0) || (sampleRate != mInSamplingRate) || (format != mInFormat)
579        || (channelMask != mInChannelMask)) {
580        size_t inBuffSize = af->getInputBufferSize(sampleRate, format, channelMask);
581        if (inBuffSize == 0) {
582            ALOGE("AudioSystem::getInputBufferSize failed sampleRate %d format %#x channelMask %x",
583                    sampleRate, format, channelMask);
584            return BAD_VALUE;
585        }
586        // A benign race is possible here: we could overwrite a fresher cache entry
587        // save the request params
588        mInSamplingRate = sampleRate;
589        mInFormat = format;
590        mInChannelMask = channelMask;
591
592        mInBuffSize = inBuffSize;
593    }
594
595    *buffSize = mInBuffSize;
596
597    return NO_ERROR;
598}
599
600sp<AudioIoDescriptor> AudioSystem::AudioFlingerClient::getIoDescriptor_l(audio_io_handle_t ioHandle)
601{
602    sp<AudioIoDescriptor> desc;
603    ssize_t index = mIoDescriptors.indexOfKey(ioHandle);
604    if (index >= 0) {
605        desc = mIoDescriptors.valueAt(index);
606    }
607    return desc;
608}
609
610sp<AudioIoDescriptor> AudioSystem::AudioFlingerClient::getIoDescriptor(audio_io_handle_t ioHandle)
611{
612    Mutex::Autolock _l(mLock);
613    return getIoDescriptor_l(ioHandle);
614}
615
616status_t AudioSystem::AudioFlingerClient::addAudioDeviceCallback(
617        const sp<AudioDeviceCallback>& callback, audio_io_handle_t audioIo)
618{
619    Mutex::Autolock _l(mLock);
620    Vector < sp<AudioDeviceCallback> > callbacks;
621    ssize_t ioIndex = mAudioDeviceCallbacks.indexOfKey(audioIo);
622    if (ioIndex >= 0) {
623        callbacks = mAudioDeviceCallbacks.valueAt(ioIndex);
624    }
625
626    for (size_t cbIndex = 0; cbIndex < callbacks.size(); cbIndex++) {
627        if (callbacks[cbIndex] == callback) {
628            return INVALID_OPERATION;
629        }
630    }
631    callbacks.add(callback);
632
633    mAudioDeviceCallbacks.replaceValueFor(audioIo, callbacks);
634    return NO_ERROR;
635}
636
637status_t AudioSystem::AudioFlingerClient::removeAudioDeviceCallback(
638        const sp<AudioDeviceCallback>& callback, audio_io_handle_t audioIo)
639{
640    Mutex::Autolock _l(mLock);
641    ssize_t ioIndex = mAudioDeviceCallbacks.indexOfKey(audioIo);
642    if (ioIndex < 0) {
643        return INVALID_OPERATION;
644    }
645    Vector < sp<AudioDeviceCallback> > callbacks = mAudioDeviceCallbacks.valueAt(ioIndex);
646
647    size_t cbIndex;
648    for (cbIndex = 0; cbIndex < callbacks.size(); cbIndex++) {
649        if (callbacks[cbIndex] == callback) {
650            break;
651        }
652    }
653    if (cbIndex == callbacks.size()) {
654        return INVALID_OPERATION;
655    }
656    callbacks.removeAt(cbIndex);
657    if (callbacks.size() != 0) {
658        mAudioDeviceCallbacks.replaceValueFor(audioIo, callbacks);
659    } else {
660        mAudioDeviceCallbacks.removeItem(audioIo);
661    }
662    return NO_ERROR;
663}
664
665/* static */ void AudioSystem::setErrorCallback(audio_error_callback cb)
666{
667    Mutex::Autolock _l(gLock);
668    gAudioErrorCallback = cb;
669}
670
671/*static*/ void AudioSystem::setDynPolicyCallback(dynamic_policy_callback cb)
672{
673    Mutex::Autolock _l(gLock);
674    gDynPolicyCallback = cb;
675}
676
677/*static*/ void AudioSystem::setRecordConfigCallback(record_config_callback cb)
678{
679    Mutex::Autolock _l(gLock);
680    gRecordConfigCallback = cb;
681}
682
683// client singleton for AudioPolicyService binder interface
684// protected by gLockAPS
685sp<IAudioPolicyService> AudioSystem::gAudioPolicyService;
686sp<AudioSystem::AudioPolicyServiceClient> AudioSystem::gAudioPolicyServiceClient;
687
688
689// establish binder interface to AudioPolicy service
690const sp<IAudioPolicyService> AudioSystem::get_audio_policy_service()
691{
692    sp<IAudioPolicyService> ap;
693    sp<AudioPolicyServiceClient> apc;
694    {
695        Mutex::Autolock _l(gLockAPS);
696        if (gAudioPolicyService == 0) {
697            sp<IServiceManager> sm = defaultServiceManager();
698            sp<IBinder> binder;
699            do {
700                binder = sm->getService(String16("media.audio_policy"));
701                if (binder != 0)
702                    break;
703                ALOGW("AudioPolicyService not published, waiting...");
704                usleep(500000); // 0.5 s
705            } while (true);
706            if (gAudioPolicyServiceClient == NULL) {
707                gAudioPolicyServiceClient = new AudioPolicyServiceClient();
708            }
709            binder->linkToDeath(gAudioPolicyServiceClient);
710            gAudioPolicyService = interface_cast<IAudioPolicyService>(binder);
711            LOG_ALWAYS_FATAL_IF(gAudioPolicyService == 0);
712            apc = gAudioPolicyServiceClient;
713        }
714        ap = gAudioPolicyService;
715    }
716    if (apc != 0) {
717        ap->registerClient(apc);
718    }
719
720    return ap;
721}
722
723// ---------------------------------------------------------------------------
724
725status_t AudioSystem::setDeviceConnectionState(audio_devices_t device,
726                                               audio_policy_dev_state_t state,
727                                               const char *device_address,
728                                               const char *device_name)
729{
730    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
731    const char *address = "";
732    const char *name = "";
733
734    if (aps == 0) return PERMISSION_DENIED;
735
736    if (device_address != NULL) {
737        address = device_address;
738    }
739    if (device_name != NULL) {
740        name = device_name;
741    }
742    return aps->setDeviceConnectionState(device, state, address, name);
743}
744
745audio_policy_dev_state_t AudioSystem::getDeviceConnectionState(audio_devices_t device,
746                                                  const char *device_address)
747{
748    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
749    if (aps == 0) return AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE;
750
751    return aps->getDeviceConnectionState(device, device_address);
752}
753
754status_t AudioSystem::setPhoneState(audio_mode_t state)
755{
756    if (uint32_t(state) >= AUDIO_MODE_CNT) return BAD_VALUE;
757    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
758    if (aps == 0) return PERMISSION_DENIED;
759
760    return aps->setPhoneState(state);
761}
762
763status_t AudioSystem::setForceUse(audio_policy_force_use_t usage, audio_policy_forced_cfg_t config)
764{
765    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
766    if (aps == 0) return PERMISSION_DENIED;
767    return aps->setForceUse(usage, config);
768}
769
770audio_policy_forced_cfg_t AudioSystem::getForceUse(audio_policy_force_use_t usage)
771{
772    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
773    if (aps == 0) return AUDIO_POLICY_FORCE_NONE;
774    return aps->getForceUse(usage);
775}
776
777
778audio_io_handle_t AudioSystem::getOutput(audio_stream_type_t stream,
779                                    uint32_t samplingRate,
780                                    audio_format_t format,
781                                    audio_channel_mask_t channelMask,
782                                    audio_output_flags_t flags,
783                                    const audio_offload_info_t *offloadInfo)
784{
785    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
786    if (aps == 0) return 0;
787    return aps->getOutput(stream, samplingRate, format, channelMask, flags, offloadInfo);
788}
789
790status_t AudioSystem::getOutputForAttr(const audio_attributes_t *attr,
791                                        audio_io_handle_t *output,
792                                        audio_session_t session,
793                                        audio_stream_type_t *stream,
794                                        uid_t uid,
795                                        uint32_t samplingRate,
796                                        audio_format_t format,
797                                        audio_channel_mask_t channelMask,
798                                        audio_output_flags_t flags,
799                                        audio_port_handle_t selectedDeviceId,
800                                        const audio_offload_info_t *offloadInfo)
801{
802    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
803    if (aps == 0) return NO_INIT;
804    return aps->getOutputForAttr(attr, output, session, stream, uid,
805                                 samplingRate, format, channelMask,
806                                 flags, selectedDeviceId, offloadInfo);
807}
808
809status_t AudioSystem::startOutput(audio_io_handle_t output,
810                                  audio_stream_type_t stream,
811                                  audio_session_t session)
812{
813    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
814    if (aps == 0) return PERMISSION_DENIED;
815    return aps->startOutput(output, stream, session);
816}
817
818status_t AudioSystem::stopOutput(audio_io_handle_t output,
819                                 audio_stream_type_t stream,
820                                 audio_session_t session)
821{
822    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
823    if (aps == 0) return PERMISSION_DENIED;
824    return aps->stopOutput(output, stream, session);
825}
826
827void AudioSystem::releaseOutput(audio_io_handle_t output,
828                                audio_stream_type_t stream,
829                                audio_session_t session)
830{
831    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
832    if (aps == 0) return;
833    aps->releaseOutput(output, stream, session);
834}
835
836status_t AudioSystem::getInputForAttr(const audio_attributes_t *attr,
837                                audio_io_handle_t *input,
838                                audio_session_t session,
839                                pid_t pid,
840                                uid_t uid,
841                                uint32_t samplingRate,
842                                audio_format_t format,
843                                audio_channel_mask_t channelMask,
844                                audio_input_flags_t flags,
845                                audio_port_handle_t selectedDeviceId)
846{
847    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
848    if (aps == 0) return NO_INIT;
849    return aps->getInputForAttr(
850            attr, input, session, pid, uid,
851            samplingRate, format, channelMask, flags, selectedDeviceId);
852}
853
854status_t AudioSystem::startInput(audio_io_handle_t input,
855                                 audio_session_t session)
856{
857    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
858    if (aps == 0) return PERMISSION_DENIED;
859    return aps->startInput(input, session);
860}
861
862status_t AudioSystem::stopInput(audio_io_handle_t input,
863                                audio_session_t session)
864{
865    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
866    if (aps == 0) return PERMISSION_DENIED;
867    return aps->stopInput(input, session);
868}
869
870void AudioSystem::releaseInput(audio_io_handle_t input,
871                               audio_session_t session)
872{
873    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
874    if (aps == 0) return;
875    aps->releaseInput(input, session);
876}
877
878status_t AudioSystem::initStreamVolume(audio_stream_type_t stream,
879                                    int indexMin,
880                                    int indexMax)
881{
882    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
883    if (aps == 0) return PERMISSION_DENIED;
884    return aps->initStreamVolume(stream, indexMin, indexMax);
885}
886
887status_t AudioSystem::setStreamVolumeIndex(audio_stream_type_t stream,
888                                           int index,
889                                           audio_devices_t device)
890{
891    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
892    if (aps == 0) return PERMISSION_DENIED;
893    return aps->setStreamVolumeIndex(stream, index, device);
894}
895
896status_t AudioSystem::getStreamVolumeIndex(audio_stream_type_t stream,
897                                           int *index,
898                                           audio_devices_t device)
899{
900    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
901    if (aps == 0) return PERMISSION_DENIED;
902    return aps->getStreamVolumeIndex(stream, index, device);
903}
904
905uint32_t AudioSystem::getStrategyForStream(audio_stream_type_t stream)
906{
907    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
908    if (aps == 0) return 0;
909    return aps->getStrategyForStream(stream);
910}
911
912audio_devices_t AudioSystem::getDevicesForStream(audio_stream_type_t stream)
913{
914    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
915    if (aps == 0) return AUDIO_DEVICE_NONE;
916    return aps->getDevicesForStream(stream);
917}
918
919audio_io_handle_t AudioSystem::getOutputForEffect(const effect_descriptor_t *desc)
920{
921    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
922    // FIXME change return type to status_t, and return PERMISSION_DENIED here
923    if (aps == 0) return AUDIO_IO_HANDLE_NONE;
924    return aps->getOutputForEffect(desc);
925}
926
927status_t AudioSystem::registerEffect(const effect_descriptor_t *desc,
928                                audio_io_handle_t io,
929                                uint32_t strategy,
930                                audio_session_t session,
931                                int id)
932{
933    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
934    if (aps == 0) return PERMISSION_DENIED;
935    return aps->registerEffect(desc, io, strategy, session, id);
936}
937
938status_t AudioSystem::unregisterEffect(int id)
939{
940    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
941    if (aps == 0) return PERMISSION_DENIED;
942    return aps->unregisterEffect(id);
943}
944
945status_t AudioSystem::setEffectEnabled(int id, bool enabled)
946{
947    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
948    if (aps == 0) return PERMISSION_DENIED;
949    return aps->setEffectEnabled(id, enabled);
950}
951
952status_t AudioSystem::isStreamActive(audio_stream_type_t stream, bool* state, uint32_t inPastMs)
953{
954    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
955    if (aps == 0) return PERMISSION_DENIED;
956    if (state == NULL) return BAD_VALUE;
957    *state = aps->isStreamActive(stream, inPastMs);
958    return NO_ERROR;
959}
960
961status_t AudioSystem::isStreamActiveRemotely(audio_stream_type_t stream, bool* state,
962        uint32_t inPastMs)
963{
964    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
965    if (aps == 0) return PERMISSION_DENIED;
966    if (state == NULL) return BAD_VALUE;
967    *state = aps->isStreamActiveRemotely(stream, inPastMs);
968    return NO_ERROR;
969}
970
971status_t AudioSystem::isSourceActive(audio_source_t stream, bool* state)
972{
973    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
974    if (aps == 0) return PERMISSION_DENIED;
975    if (state == NULL) return BAD_VALUE;
976    *state = aps->isSourceActive(stream);
977    return NO_ERROR;
978}
979
980uint32_t AudioSystem::getPrimaryOutputSamplingRate()
981{
982    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
983    if (af == 0) return 0;
984    return af->getPrimaryOutputSamplingRate();
985}
986
987size_t AudioSystem::getPrimaryOutputFrameCount()
988{
989    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
990    if (af == 0) return 0;
991    return af->getPrimaryOutputFrameCount();
992}
993
994status_t AudioSystem::setLowRamDevice(bool isLowRamDevice)
995{
996    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
997    if (af == 0) return PERMISSION_DENIED;
998    return af->setLowRamDevice(isLowRamDevice);
999}
1000
1001void AudioSystem::clearAudioConfigCache()
1002{
1003    // called by restoreTrack_l(), which needs new IAudioFlinger and IAudioPolicyService instances
1004    ALOGV("clearAudioConfigCache()");
1005    {
1006        Mutex::Autolock _l(gLock);
1007        if (gAudioFlingerClient != 0) {
1008            gAudioFlingerClient->clearIoCache();
1009        }
1010        gAudioFlinger.clear();
1011    }
1012    {
1013        Mutex::Autolock _l(gLockAPS);
1014        gAudioPolicyService.clear();
1015    }
1016}
1017
1018bool AudioSystem::isOffloadSupported(const audio_offload_info_t& info)
1019{
1020    ALOGV("isOffloadSupported()");
1021    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
1022    if (aps == 0) return false;
1023    return aps->isOffloadSupported(info);
1024}
1025
1026status_t AudioSystem::listAudioPorts(audio_port_role_t role,
1027                                     audio_port_type_t type,
1028                                     unsigned int *num_ports,
1029                                     struct audio_port *ports,
1030                                     unsigned int *generation)
1031{
1032    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
1033    if (aps == 0) return PERMISSION_DENIED;
1034    return aps->listAudioPorts(role, type, num_ports, ports, generation);
1035}
1036
1037status_t AudioSystem::getAudioPort(struct audio_port *port)
1038{
1039    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
1040    if (aps == 0) return PERMISSION_DENIED;
1041    return aps->getAudioPort(port);
1042}
1043
1044status_t AudioSystem::createAudioPatch(const struct audio_patch *patch,
1045                                   audio_patch_handle_t *handle)
1046{
1047    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
1048    if (aps == 0) return PERMISSION_DENIED;
1049    return aps->createAudioPatch(patch, handle);
1050}
1051
1052status_t AudioSystem::releaseAudioPatch(audio_patch_handle_t handle)
1053{
1054    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
1055    if (aps == 0) return PERMISSION_DENIED;
1056    return aps->releaseAudioPatch(handle);
1057}
1058
1059status_t AudioSystem::listAudioPatches(unsigned int *num_patches,
1060                                  struct audio_patch *patches,
1061                                  unsigned int *generation)
1062{
1063    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
1064    if (aps == 0) return PERMISSION_DENIED;
1065    return aps->listAudioPatches(num_patches, patches, generation);
1066}
1067
1068status_t AudioSystem::setAudioPortConfig(const struct audio_port_config *config)
1069{
1070    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
1071    if (aps == 0) return PERMISSION_DENIED;
1072    return aps->setAudioPortConfig(config);
1073}
1074
1075status_t AudioSystem::addAudioPortCallback(const sp<AudioPortCallback>& callback)
1076{
1077    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
1078    if (aps == 0) return PERMISSION_DENIED;
1079
1080    Mutex::Autolock _l(gLockAPS);
1081    if (gAudioPolicyServiceClient == 0) {
1082        return NO_INIT;
1083    }
1084    int ret = gAudioPolicyServiceClient->addAudioPortCallback(callback);
1085    if (ret == 1) {
1086        aps->setAudioPortCallbacksEnabled(true);
1087    }
1088    return (ret < 0) ? INVALID_OPERATION : NO_ERROR;
1089}
1090
1091/*static*/
1092status_t AudioSystem::removeAudioPortCallback(const sp<AudioPortCallback>& callback)
1093{
1094    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
1095    if (aps == 0) return PERMISSION_DENIED;
1096
1097    Mutex::Autolock _l(gLockAPS);
1098    if (gAudioPolicyServiceClient == 0) {
1099        return NO_INIT;
1100    }
1101    int ret = gAudioPolicyServiceClient->removeAudioPortCallback(callback);
1102    if (ret == 0) {
1103        aps->setAudioPortCallbacksEnabled(false);
1104    }
1105    return (ret < 0) ? INVALID_OPERATION : NO_ERROR;
1106}
1107
1108status_t AudioSystem::addAudioDeviceCallback(
1109        const sp<AudioDeviceCallback>& callback, audio_io_handle_t audioIo)
1110{
1111    const sp<AudioFlingerClient> afc = getAudioFlingerClient();
1112    if (afc == 0) {
1113        return NO_INIT;
1114    }
1115    status_t status = afc->addAudioDeviceCallback(callback, audioIo);
1116    if (status == NO_ERROR) {
1117        const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
1118        if (af != 0) {
1119            af->registerClient(afc);
1120        }
1121    }
1122    return status;
1123}
1124
1125status_t AudioSystem::removeAudioDeviceCallback(
1126        const sp<AudioDeviceCallback>& callback, audio_io_handle_t audioIo)
1127{
1128    const sp<AudioFlingerClient> afc = getAudioFlingerClient();
1129    if (afc == 0) {
1130        return NO_INIT;
1131    }
1132    return afc->removeAudioDeviceCallback(callback, audioIo);
1133}
1134
1135audio_port_handle_t AudioSystem::getDeviceIdForIo(audio_io_handle_t audioIo)
1136{
1137    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
1138    if (af == 0) return PERMISSION_DENIED;
1139    const sp<AudioIoDescriptor> desc = getIoDescriptor(audioIo);
1140    if (desc == 0) {
1141        return AUDIO_PORT_HANDLE_NONE;
1142    }
1143    return desc->getDeviceId();
1144}
1145
1146status_t AudioSystem::acquireSoundTriggerSession(audio_session_t *session,
1147                                       audio_io_handle_t *ioHandle,
1148                                       audio_devices_t *device)
1149{
1150    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
1151    if (aps == 0) return PERMISSION_DENIED;
1152    return aps->acquireSoundTriggerSession(session, ioHandle, device);
1153}
1154
1155status_t AudioSystem::releaseSoundTriggerSession(audio_session_t session)
1156{
1157    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
1158    if (aps == 0) return PERMISSION_DENIED;
1159    return aps->releaseSoundTriggerSession(session);
1160}
1161
1162audio_mode_t AudioSystem::getPhoneState()
1163{
1164    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
1165    if (aps == 0) return AUDIO_MODE_INVALID;
1166    return aps->getPhoneState();
1167}
1168
1169status_t AudioSystem::registerPolicyMixes(Vector<AudioMix> mixes, bool registration)
1170{
1171    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
1172    if (aps == 0) return PERMISSION_DENIED;
1173    return aps->registerPolicyMixes(mixes, registration);
1174}
1175
1176status_t AudioSystem::startAudioSource(const struct audio_port_config *source,
1177                                       const audio_attributes_t *attributes,
1178                                       audio_io_handle_t *handle)
1179{
1180    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
1181    if (aps == 0) return PERMISSION_DENIED;
1182    return aps->startAudioSource(source, attributes, handle);
1183}
1184
1185status_t AudioSystem::stopAudioSource(audio_io_handle_t handle)
1186{
1187    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
1188    if (aps == 0) return PERMISSION_DENIED;
1189    return aps->stopAudioSource(handle);
1190}
1191
1192status_t AudioSystem::setMasterMono(bool mono)
1193{
1194    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
1195    if (aps == 0) return PERMISSION_DENIED;
1196    return aps->setMasterMono(mono);
1197}
1198
1199status_t AudioSystem::getMasterMono(bool *mono)
1200{
1201    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
1202    if (aps == 0) return PERMISSION_DENIED;
1203    return aps->getMasterMono(mono);
1204}
1205
1206// ---------------------------------------------------------------------------
1207
1208int AudioSystem::AudioPolicyServiceClient::addAudioPortCallback(
1209        const sp<AudioPortCallback>& callback)
1210{
1211    Mutex::Autolock _l(mLock);
1212    for (size_t i = 0; i < mAudioPortCallbacks.size(); i++) {
1213        if (mAudioPortCallbacks[i] == callback) {
1214            return -1;
1215        }
1216    }
1217    mAudioPortCallbacks.add(callback);
1218    return mAudioPortCallbacks.size();
1219}
1220
1221int AudioSystem::AudioPolicyServiceClient::removeAudioPortCallback(
1222        const sp<AudioPortCallback>& callback)
1223{
1224    Mutex::Autolock _l(mLock);
1225    size_t i;
1226    for (i = 0; i < mAudioPortCallbacks.size(); i++) {
1227        if (mAudioPortCallbacks[i] == callback) {
1228            break;
1229        }
1230    }
1231    if (i == mAudioPortCallbacks.size()) {
1232        return -1;
1233    }
1234    mAudioPortCallbacks.removeAt(i);
1235    return mAudioPortCallbacks.size();
1236}
1237
1238
1239void AudioSystem::AudioPolicyServiceClient::onAudioPortListUpdate()
1240{
1241    Mutex::Autolock _l(mLock);
1242    for (size_t i = 0; i < mAudioPortCallbacks.size(); i++) {
1243        mAudioPortCallbacks[i]->onAudioPortListUpdate();
1244    }
1245}
1246
1247void AudioSystem::AudioPolicyServiceClient::onAudioPatchListUpdate()
1248{
1249    Mutex::Autolock _l(mLock);
1250    for (size_t i = 0; i < mAudioPortCallbacks.size(); i++) {
1251        mAudioPortCallbacks[i]->onAudioPatchListUpdate();
1252    }
1253}
1254
1255void AudioSystem::AudioPolicyServiceClient::onDynamicPolicyMixStateUpdate(
1256        String8 regId, int32_t state)
1257{
1258    ALOGV("AudioPolicyServiceClient::onDynamicPolicyMixStateUpdate(%s, %d)", regId.string(), state);
1259    dynamic_policy_callback cb = NULL;
1260    {
1261        Mutex::Autolock _l(AudioSystem::gLock);
1262        cb = gDynPolicyCallback;
1263    }
1264
1265    if (cb != NULL) {
1266        cb(DYNAMIC_POLICY_EVENT_MIX_STATE_UPDATE, regId, state);
1267    }
1268}
1269
1270void AudioSystem::AudioPolicyServiceClient::onRecordingConfigurationUpdate(
1271        int event, audio_session_t session, audio_source_t source,
1272        const audio_config_base_t *clientConfig, const audio_config_base_t *deviceConfig,
1273        audio_patch_handle_t patchHandle) {
1274    record_config_callback cb = NULL;
1275    {
1276        Mutex::Autolock _l(AudioSystem::gLock);
1277        cb = gRecordConfigCallback;
1278    }
1279
1280    if (cb != NULL) {
1281        cb(event, session, source, clientConfig, deviceConfig, patchHandle);
1282    }
1283}
1284
1285void AudioSystem::AudioPolicyServiceClient::binderDied(const wp<IBinder>& who __unused)
1286{
1287    {
1288        Mutex::Autolock _l(mLock);
1289        for (size_t i = 0; i < mAudioPortCallbacks.size(); i++) {
1290            mAudioPortCallbacks[i]->onServiceDied();
1291        }
1292    }
1293    {
1294        Mutex::Autolock _l(gLockAPS);
1295        AudioSystem::gAudioPolicyService.clear();
1296    }
1297
1298    ALOGW("AudioPolicyService server died!");
1299}
1300
1301} // namespace android
1302