AudioSystem.cpp revision 7c7f10bd4fda9a084e5e7f0eb3a040dfcbf01745 
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/IAudioPolicyService.h>
24#include <math.h>
25
26#include <system/audio.h>
27
28// ----------------------------------------------------------------------------
29
30namespace android {
31
32// client singleton for AudioFlinger binder interface
33Mutex AudioSystem::gLock;
34sp<IAudioFlinger> AudioSystem::gAudioFlinger;
35sp<AudioSystem::AudioFlingerClient> AudioSystem::gAudioFlingerClient;
36audio_error_callback AudioSystem::gAudioErrorCallback = NULL;
37// Cached values
38DefaultKeyedVector<int, audio_io_handle_t> AudioSystem::gStreamOutputMap(0);
39DefaultKeyedVector<audio_io_handle_t, AudioSystem::OutputDescriptor *> AudioSystem::gOutputs(0);
40
41// Cached values for recording queries
42uint32_t AudioSystem::gPrevInSamplingRate = 16000;
43int AudioSystem::gPrevInFormat = AUDIO_FORMAT_PCM_16_BIT;
44int AudioSystem::gPrevInChannelCount = 1;
45size_t AudioSystem::gInBuffSize = 0;
46
47
48// establish binder interface to AudioFlinger service
49const sp<IAudioFlinger>& AudioSystem::get_audio_flinger()
50{
51    Mutex::Autolock _l(gLock);
52    if (gAudioFlinger.get() == 0) {
53        sp<IServiceManager> sm = defaultServiceManager();
54        sp<IBinder> binder;
55        do {
56            binder = sm->getService(String16("media.audio_flinger"));
57            if (binder != 0)
58                break;
59            LOGW("AudioFlinger not published, waiting...");
60            usleep(500000); // 0.5 s
61        } while(true);
62        if (gAudioFlingerClient == NULL) {
63            gAudioFlingerClient = new AudioFlingerClient();
64        } else {
65            if (gAudioErrorCallback) {
66                gAudioErrorCallback(NO_ERROR);
67            }
68         }
69        binder->linkToDeath(gAudioFlingerClient);
70        gAudioFlinger = interface_cast<IAudioFlinger>(binder);
71        gAudioFlinger->registerClient(gAudioFlingerClient);
72    }
73    LOGE_IF(gAudioFlinger==0, "no AudioFlinger!?");
74
75    return gAudioFlinger;
76}
77
78status_t AudioSystem::muteMicrophone(bool state) {
79    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
80    if (af == 0) return PERMISSION_DENIED;
81    return af->setMicMute(state);
82}
83
84status_t AudioSystem::isMicrophoneMuted(bool* state) {
85    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
86    if (af == 0) return PERMISSION_DENIED;
87    *state = af->getMicMute();
88    return NO_ERROR;
89}
90
91status_t AudioSystem::setMasterVolume(float value)
92{
93    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
94    if (af == 0) return PERMISSION_DENIED;
95    af->setMasterVolume(value);
96    return NO_ERROR;
97}
98
99status_t AudioSystem::setMasterMute(bool mute)
100{
101    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
102    if (af == 0) return PERMISSION_DENIED;
103    af->setMasterMute(mute);
104    return NO_ERROR;
105}
106
107status_t AudioSystem::getMasterVolume(float* volume)
108{
109    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
110    if (af == 0) return PERMISSION_DENIED;
111    *volume = af->masterVolume();
112    return NO_ERROR;
113}
114
115status_t AudioSystem::getMasterMute(bool* mute)
116{
117    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
118    if (af == 0) return PERMISSION_DENIED;
119    *mute = af->masterMute();
120    return NO_ERROR;
121}
122
123status_t AudioSystem::setStreamVolume(int stream, float value, int output)
124{
125    if (uint32_t(stream) >= AUDIO_STREAM_CNT) return BAD_VALUE;
126    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
127    if (af == 0) return PERMISSION_DENIED;
128    af->setStreamVolume(stream, value, output);
129    return NO_ERROR;
130}
131
132status_t AudioSystem::setStreamMute(int stream, bool mute)
133{
134    if (uint32_t(stream) >= AUDIO_STREAM_CNT) return BAD_VALUE;
135    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
136    if (af == 0) return PERMISSION_DENIED;
137    af->setStreamMute(stream, mute);
138    return NO_ERROR;
139}
140
141status_t AudioSystem::getStreamVolume(int stream, float* volume, int output)
142{
143    if (uint32_t(stream) >= AUDIO_STREAM_CNT) return BAD_VALUE;
144    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
145    if (af == 0) return PERMISSION_DENIED;
146    *volume = af->streamVolume(stream, output);
147    return NO_ERROR;
148}
149
150status_t AudioSystem::getStreamMute(int stream, bool* mute)
151{
152    if (uint32_t(stream) >= AUDIO_STREAM_CNT) return BAD_VALUE;
153    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
154    if (af == 0) return PERMISSION_DENIED;
155    *mute = af->streamMute(stream);
156    return NO_ERROR;
157}
158
159status_t AudioSystem::setMode(int mode)
160{
161    if (mode >= AUDIO_MODE_CNT) return BAD_VALUE;
162    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
163    if (af == 0) return PERMISSION_DENIED;
164    return af->setMode(mode);
165}
166
167status_t AudioSystem::setParameters(audio_io_handle_t ioHandle, const String8& keyValuePairs) {
168    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
169    if (af == 0) return PERMISSION_DENIED;
170    return af->setParameters(ioHandle, keyValuePairs);
171}
172
173String8 AudioSystem::getParameters(audio_io_handle_t ioHandle, const String8& keys) {
174    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
175    String8 result = String8("");
176    if (af == 0) return result;
177
178    result = af->getParameters(ioHandle, keys);
179    return result;
180}
181
182// convert volume steps to natural log scale
183
184// change this value to change volume scaling
185static const float dBPerStep = 0.5f;
186// shouldn't need to touch these
187static const float dBConvert = -dBPerStep * 2.302585093f / 20.0f;
188static const float dBConvertInverse = 1.0f / dBConvert;
189
190float AudioSystem::linearToLog(int volume)
191{
192    // float v = volume ? exp(float(100 - volume) * dBConvert) : 0;
193    // LOGD("linearToLog(%d)=%f", volume, v);
194    // return v;
195    return volume ? exp(float(100 - volume) * dBConvert) : 0;
196}
197
198int AudioSystem::logToLinear(float volume)
199{
200    // int v = volume ? 100 - int(dBConvertInverse * log(volume) + 0.5) : 0;
201    // LOGD("logTolinear(%d)=%f", v, volume);
202    // return v;
203    return volume ? 100 - int(dBConvertInverse * log(volume) + 0.5) : 0;
204}
205
206status_t AudioSystem::getOutputSamplingRate(int* samplingRate, int streamType)
207{
208    OutputDescriptor *outputDesc;
209    audio_io_handle_t output;
210
211    if (streamType == AUDIO_STREAM_DEFAULT) {
212        streamType = AUDIO_STREAM_MUSIC;
213    }
214
215    output = getOutput((audio_stream_type_t)streamType);
216    if (output == 0) {
217        return PERMISSION_DENIED;
218    }
219
220    gLock.lock();
221    outputDesc = AudioSystem::gOutputs.valueFor(output);
222    if (outputDesc == 0) {
223        LOGV("getOutputSamplingRate() no output descriptor for output %d in gOutputs", output);
224        gLock.unlock();
225        const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
226        if (af == 0) return PERMISSION_DENIED;
227        *samplingRate = af->sampleRate(output);
228    } else {
229        LOGV("getOutputSamplingRate() reading from output desc");
230        *samplingRate = outputDesc->samplingRate;
231        gLock.unlock();
232    }
233
234    LOGV("getOutputSamplingRate() streamType %d, output %d, sampling rate %d", streamType, output, *samplingRate);
235
236    return NO_ERROR;
237}
238
239status_t AudioSystem::getOutputFrameCount(int* frameCount, int streamType)
240{
241    OutputDescriptor *outputDesc;
242    audio_io_handle_t output;
243
244    if (streamType == AUDIO_STREAM_DEFAULT) {
245        streamType = AUDIO_STREAM_MUSIC;
246    }
247
248    output = getOutput((audio_stream_type_t)streamType);
249    if (output == 0) {
250        return PERMISSION_DENIED;
251    }
252
253    gLock.lock();
254    outputDesc = AudioSystem::gOutputs.valueFor(output);
255    if (outputDesc == 0) {
256        gLock.unlock();
257        const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
258        if (af == 0) return PERMISSION_DENIED;
259        *frameCount = af->frameCount(output);
260    } else {
261        *frameCount = outputDesc->frameCount;
262        gLock.unlock();
263    }
264
265    LOGV("getOutputFrameCount() streamType %d, output %d, frameCount %d", streamType, output, *frameCount);
266
267    return NO_ERROR;
268}
269
270status_t AudioSystem::getOutputLatency(uint32_t* latency, int streamType)
271{
272    OutputDescriptor *outputDesc;
273    audio_io_handle_t output;
274
275    if (streamType == AUDIO_STREAM_DEFAULT) {
276        streamType = AUDIO_STREAM_MUSIC;
277    }
278
279    output = getOutput((audio_stream_type_t)streamType);
280    if (output == 0) {
281        return PERMISSION_DENIED;
282    }
283
284    gLock.lock();
285    outputDesc = AudioSystem::gOutputs.valueFor(output);
286    if (outputDesc == 0) {
287        gLock.unlock();
288        const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
289        if (af == 0) return PERMISSION_DENIED;
290        *latency = af->latency(output);
291    } else {
292        *latency = outputDesc->latency;
293        gLock.unlock();
294    }
295
296    LOGV("getOutputLatency() streamType %d, output %d, latency %d", streamType, output, *latency);
297
298    return NO_ERROR;
299}
300
301status_t AudioSystem::getInputBufferSize(uint32_t sampleRate, int format, int channelCount,
302    size_t* buffSize)
303{
304    // Do we have a stale gInBufferSize or are we requesting the input buffer size for new values
305    if ((gInBuffSize == 0) || (sampleRate != gPrevInSamplingRate) || (format != gPrevInFormat)
306        || (channelCount != gPrevInChannelCount)) {
307        // save the request params
308        gPrevInSamplingRate = sampleRate;
309        gPrevInFormat = format;
310        gPrevInChannelCount = channelCount;
311
312        gInBuffSize = 0;
313        const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
314        if (af == 0) {
315            return PERMISSION_DENIED;
316        }
317        gInBuffSize = af->getInputBufferSize(sampleRate, format, channelCount);
318    }
319    *buffSize = gInBuffSize;
320
321    return NO_ERROR;
322}
323
324status_t AudioSystem::setVoiceVolume(float value)
325{
326    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
327    if (af == 0) return PERMISSION_DENIED;
328    return af->setVoiceVolume(value);
329}
330
331status_t AudioSystem::getRenderPosition(uint32_t *halFrames, uint32_t *dspFrames, int stream)
332{
333    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
334    if (af == 0) return PERMISSION_DENIED;
335
336    if (stream == AUDIO_STREAM_DEFAULT) {
337        stream = AUDIO_STREAM_MUSIC;
338    }
339
340    return af->getRenderPosition(halFrames, dspFrames, getOutput((audio_stream_type_t)stream));
341}
342
343unsigned int AudioSystem::getInputFramesLost(audio_io_handle_t ioHandle) {
344    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
345    unsigned int result = 0;
346    if (af == 0) return result;
347    if (ioHandle == 0) return result;
348
349    result = af->getInputFramesLost(ioHandle);
350    return result;
351}
352
353int AudioSystem::newAudioSessionId() {
354    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
355    if (af == 0) return 0;
356    return af->newAudioSessionId();
357}
358
359// ---------------------------------------------------------------------------
360
361void AudioSystem::AudioFlingerClient::binderDied(const wp<IBinder>& who) {
362    Mutex::Autolock _l(AudioSystem::gLock);
363
364    AudioSystem::gAudioFlinger.clear();
365    // clear output handles and stream to output map caches
366    AudioSystem::gStreamOutputMap.clear();
367    AudioSystem::gOutputs.clear();
368
369    if (gAudioErrorCallback) {
370        gAudioErrorCallback(DEAD_OBJECT);
371    }
372    LOGW("AudioFlinger server died!");
373}
374
375void AudioSystem::AudioFlingerClient::ioConfigChanged(int event, int ioHandle, void *param2) {
376    LOGV("ioConfigChanged() event %d", event);
377    OutputDescriptor *desc;
378    uint32_t stream;
379
380    if (ioHandle == 0) return;
381
382    Mutex::Autolock _l(AudioSystem::gLock);
383
384    switch (event) {
385    case STREAM_CONFIG_CHANGED:
386        if (param2 == 0) break;
387        stream = *(uint32_t *)param2;
388        LOGV("ioConfigChanged() STREAM_CONFIG_CHANGED stream %d, output %d", stream, ioHandle);
389        if (gStreamOutputMap.indexOfKey(stream) >= 0) {
390            gStreamOutputMap.replaceValueFor(stream, ioHandle);
391        }
392        break;
393    case OUTPUT_OPENED: {
394        if (gOutputs.indexOfKey(ioHandle) >= 0) {
395            LOGV("ioConfigChanged() opening already existing output! %d", ioHandle);
396            break;
397        }
398        if (param2 == 0) break;
399        desc = (OutputDescriptor *)param2;
400
401        OutputDescriptor *outputDesc =  new OutputDescriptor(*desc);
402        gOutputs.add(ioHandle, outputDesc);
403        LOGV("ioConfigChanged() new output samplingRate %d, format %d channels %d frameCount %d latency %d",
404                outputDesc->samplingRate, outputDesc->format, outputDesc->channels, outputDesc->frameCount, outputDesc->latency);
405        } break;
406    case OUTPUT_CLOSED: {
407        if (gOutputs.indexOfKey(ioHandle) < 0) {
408            LOGW("ioConfigChanged() closing unknow output! %d", ioHandle);
409            break;
410        }
411        LOGV("ioConfigChanged() output %d closed", ioHandle);
412
413        gOutputs.removeItem(ioHandle);
414        for (int i = gStreamOutputMap.size() - 1; i >= 0 ; i--) {
415            if (gStreamOutputMap.valueAt(i) == ioHandle) {
416                gStreamOutputMap.removeItemsAt(i);
417            }
418        }
419        } break;
420
421    case OUTPUT_CONFIG_CHANGED: {
422        int index = gOutputs.indexOfKey(ioHandle);
423        if (index < 0) {
424            LOGW("ioConfigChanged() modifying unknow output! %d", ioHandle);
425            break;
426        }
427        if (param2 == 0) break;
428        desc = (OutputDescriptor *)param2;
429
430        LOGV("ioConfigChanged() new config for output %d samplingRate %d, format %d channels %d frameCount %d latency %d",
431                ioHandle, desc->samplingRate, desc->format,
432                desc->channels, desc->frameCount, desc->latency);
433        OutputDescriptor *outputDesc = gOutputs.valueAt(index);
434        delete outputDesc;
435        outputDesc =  new OutputDescriptor(*desc);
436        gOutputs.replaceValueFor(ioHandle, outputDesc);
437    } break;
438    case INPUT_OPENED:
439    case INPUT_CLOSED:
440    case INPUT_CONFIG_CHANGED:
441        break;
442
443    }
444}
445
446void AudioSystem::setErrorCallback(audio_error_callback cb) {
447    Mutex::Autolock _l(gLock);
448    gAudioErrorCallback = cb;
449}
450
451bool AudioSystem::routedToA2dpOutput(int streamType) {
452    switch(streamType) {
453    case AUDIO_STREAM_MUSIC:
454    case AUDIO_STREAM_VOICE_CALL:
455    case AUDIO_STREAM_BLUETOOTH_SCO:
456    case AUDIO_STREAM_SYSTEM:
457        return true;
458    default:
459        return false;
460    }
461}
462
463
464// client singleton for AudioPolicyService binder interface
465sp<IAudioPolicyService> AudioSystem::gAudioPolicyService;
466sp<AudioSystem::AudioPolicyServiceClient> AudioSystem::gAudioPolicyServiceClient;
467
468
469// establish binder interface to AudioFlinger service
470const sp<IAudioPolicyService>& AudioSystem::get_audio_policy_service()
471{
472    gLock.lock();
473    if (gAudioPolicyService.get() == 0) {
474        sp<IServiceManager> sm = defaultServiceManager();
475        sp<IBinder> binder;
476        do {
477            binder = sm->getService(String16("media.audio_policy"));
478            if (binder != 0)
479                break;
480            LOGW("AudioPolicyService not published, waiting...");
481            usleep(500000); // 0.5 s
482        } while(true);
483        if (gAudioPolicyServiceClient == NULL) {
484            gAudioPolicyServiceClient = new AudioPolicyServiceClient();
485        }
486        binder->linkToDeath(gAudioPolicyServiceClient);
487        gAudioPolicyService = interface_cast<IAudioPolicyService>(binder);
488        gLock.unlock();
489    } else {
490        gLock.unlock();
491    }
492    return gAudioPolicyService;
493}
494
495status_t AudioSystem::setDeviceConnectionState(audio_devices_t device,
496                                               audio_policy_dev_state_t state,
497                                               const char *device_address)
498{
499    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
500    if (aps == 0) return PERMISSION_DENIED;
501
502    return aps->setDeviceConnectionState(device, state, device_address);
503}
504
505audio_policy_dev_state_t AudioSystem::getDeviceConnectionState(audio_devices_t device,
506                                                  const char *device_address)
507{
508    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
509    if (aps == 0) return AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE;
510
511    return aps->getDeviceConnectionState(device, device_address);
512}
513
514status_t AudioSystem::setPhoneState(int state)
515{
516    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
517    if (aps == 0) return PERMISSION_DENIED;
518
519    return aps->setPhoneState(state);
520}
521
522status_t AudioSystem::setRingerMode(uint32_t mode, uint32_t mask)
523{
524    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
525    if (aps == 0) return PERMISSION_DENIED;
526    return aps->setRingerMode(mode, mask);
527}
528
529status_t AudioSystem::setForceUse(audio_policy_force_use_t usage, audio_policy_forced_cfg_t config)
530{
531    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
532    if (aps == 0) return PERMISSION_DENIED;
533    return aps->setForceUse(usage, config);
534}
535
536audio_policy_forced_cfg_t AudioSystem::getForceUse(audio_policy_force_use_t usage)
537{
538    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
539    if (aps == 0) return AUDIO_POLICY_FORCE_NONE;
540    return aps->getForceUse(usage);
541}
542
543
544audio_io_handle_t AudioSystem::getOutput(audio_stream_type_t stream,
545                                    uint32_t samplingRate,
546                                    uint32_t format,
547                                    uint32_t channels,
548                                    audio_policy_output_flags_t flags)
549{
550    audio_io_handle_t output = 0;
551    // Do not use stream to output map cache if the direct output
552    // flag is set or if we are likely to use a direct output
553    // (e.g voice call stream @ 8kHz could use BT SCO device and be routed to
554    // a direct output on some platforms).
555    // TODO: the output cache and stream to output mapping implementation needs to
556    // be reworked for proper operation with direct outputs. This code is too specific
557    // to the first use case we want to cover (Voice Recognition and Voice Dialer over
558    // Bluetooth SCO
559    if ((flags & AUDIO_POLICY_OUTPUT_FLAG_DIRECT) == 0 &&
560        ((stream != AUDIO_STREAM_VOICE_CALL && stream != AUDIO_STREAM_BLUETOOTH_SCO) ||
561         channels != AUDIO_CHANNEL_OUT_MONO ||
562         (samplingRate != 8000 && samplingRate != 16000))) {
563        Mutex::Autolock _l(gLock);
564        output = AudioSystem::gStreamOutputMap.valueFor(stream);
565        LOGV_IF((output != 0), "getOutput() read %d from cache for stream %d", output, stream);
566    }
567    if (output == 0) {
568        const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
569        if (aps == 0) return 0;
570        output = aps->getOutput(stream, samplingRate, format, channels, flags);
571        if ((flags & AUDIO_POLICY_OUTPUT_FLAG_DIRECT) == 0) {
572            Mutex::Autolock _l(gLock);
573            AudioSystem::gStreamOutputMap.add(stream, output);
574        }
575    }
576    return output;
577}
578
579status_t AudioSystem::startOutput(audio_io_handle_t output,
580                                  audio_stream_type_t stream,
581                                  int session)
582{
583    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
584    if (aps == 0) return PERMISSION_DENIED;
585    return aps->startOutput(output, stream, session);
586}
587
588status_t AudioSystem::stopOutput(audio_io_handle_t output,
589                                 audio_stream_type_t stream,
590                                 int session)
591{
592    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
593    if (aps == 0) return PERMISSION_DENIED;
594    return aps->stopOutput(output, stream, session);
595}
596
597void AudioSystem::releaseOutput(audio_io_handle_t output)
598{
599    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
600    if (aps == 0) return;
601    aps->releaseOutput(output);
602}
603
604audio_io_handle_t AudioSystem::getInput(int inputSource,
605                                    uint32_t samplingRate,
606                                    uint32_t format,
607                                    uint32_t channels,
608                                    audio_in_acoustics_t acoustics,
609                                    int sessionId)
610{
611    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
612    if (aps == 0) return 0;
613    return aps->getInput(inputSource, samplingRate, format, channels, acoustics, sessionId);
614}
615
616status_t AudioSystem::startInput(audio_io_handle_t input)
617{
618    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
619    if (aps == 0) return PERMISSION_DENIED;
620    return aps->startInput(input);
621}
622
623status_t AudioSystem::stopInput(audio_io_handle_t input)
624{
625    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
626    if (aps == 0) return PERMISSION_DENIED;
627    return aps->stopInput(input);
628}
629
630void AudioSystem::releaseInput(audio_io_handle_t input)
631{
632    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
633    if (aps == 0) return;
634    aps->releaseInput(input);
635}
636
637status_t AudioSystem::initStreamVolume(audio_stream_type_t stream,
638                                    int indexMin,
639                                    int indexMax)
640{
641    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
642    if (aps == 0) return PERMISSION_DENIED;
643    return aps->initStreamVolume(stream, indexMin, indexMax);
644}
645
646status_t AudioSystem::setStreamVolumeIndex(audio_stream_type_t stream, int index)
647{
648    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
649    if (aps == 0) return PERMISSION_DENIED;
650    return aps->setStreamVolumeIndex(stream, index);
651}
652
653status_t AudioSystem::getStreamVolumeIndex(audio_stream_type_t stream, int *index)
654{
655    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
656    if (aps == 0) return PERMISSION_DENIED;
657    return aps->getStreamVolumeIndex(stream, index);
658}
659
660uint32_t AudioSystem::getStrategyForStream(audio_stream_type_t stream)
661{
662    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
663    if (aps == 0) return 0;
664    return aps->getStrategyForStream(stream);
665}
666
667uint32_t AudioSystem::getDevicesForStream(audio_stream_type_t stream)
668{
669    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
670    if (aps == 0) return 0;
671    return aps->getDevicesForStream(stream);
672}
673
674audio_io_handle_t AudioSystem::getOutputForEffect(effect_descriptor_t *desc)
675{
676    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
677    if (aps == 0) return PERMISSION_DENIED;
678    return aps->getOutputForEffect(desc);
679}
680
681status_t AudioSystem::registerEffect(effect_descriptor_t *desc,
682                                audio_io_handle_t io,
683                                uint32_t strategy,
684                                int session,
685                                int id)
686{
687    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
688    if (aps == 0) return PERMISSION_DENIED;
689    return aps->registerEffect(desc, io, strategy, session, id);
690}
691
692status_t AudioSystem::unregisterEffect(int id)
693{
694    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
695    if (aps == 0) return PERMISSION_DENIED;
696    return aps->unregisterEffect(id);
697}
698
699status_t AudioSystem::isStreamActive(int stream, bool* state, uint32_t inPastMs)
700{
701    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
702    if (aps == 0) return PERMISSION_DENIED;
703    if (state == NULL) return BAD_VALUE;
704    *state = aps->isStreamActive(stream, inPastMs);
705    return NO_ERROR;
706}
707
708
709// ---------------------------------------------------------------------------
710
711void AudioSystem::AudioPolicyServiceClient::binderDied(const wp<IBinder>& who) {
712    Mutex::Autolock _l(AudioSystem::gLock);
713    AudioSystem::gAudioPolicyService.clear();
714
715    LOGW("AudioPolicyService server died!");
716}
717
718}; // namespace android
719
720