AudioSystem.cpp revision 930f4caa1e311ef7ff538c421a324396157eb24f 
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            ALOGW("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    ALOGE_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 (uint32_t(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    // ALOGD("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    // ALOGD("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        ALOGV("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        ALOGV("getOutputSamplingRate() reading from output desc");
230        *samplingRate = outputDesc->samplingRate;
231        gLock.unlock();
232    }
233
234    ALOGV("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    ALOGV("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    ALOGV("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
359void AudioSystem::acquireAudioSessionId(int audioSession) {
360    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
361    if (af != 0) {
362        af->acquireAudioSessionId(audioSession);
363    }
364}
365
366void AudioSystem::releaseAudioSessionId(int audioSession) {
367    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
368    if (af != 0) {
369        af->releaseAudioSessionId(audioSession);
370    }
371}
372
373// ---------------------------------------------------------------------------
374
375void AudioSystem::AudioFlingerClient::binderDied(const wp<IBinder>& who) {
376    Mutex::Autolock _l(AudioSystem::gLock);
377
378    AudioSystem::gAudioFlinger.clear();
379    // clear output handles and stream to output map caches
380    AudioSystem::gStreamOutputMap.clear();
381    AudioSystem::gOutputs.clear();
382
383    if (gAudioErrorCallback) {
384        gAudioErrorCallback(DEAD_OBJECT);
385    }
386    ALOGW("AudioFlinger server died!");
387}
388
389void AudioSystem::AudioFlingerClient::ioConfigChanged(int event, int ioHandle, void *param2) {
390    ALOGV("ioConfigChanged() event %d", event);
391    OutputDescriptor *desc;
392    uint32_t stream;
393
394    if (ioHandle == 0) return;
395
396    Mutex::Autolock _l(AudioSystem::gLock);
397
398    switch (event) {
399    case STREAM_CONFIG_CHANGED:
400        if (param2 == 0) break;
401        stream = *(uint32_t *)param2;
402        ALOGV("ioConfigChanged() STREAM_CONFIG_CHANGED stream %d, output %d", stream, ioHandle);
403        if (gStreamOutputMap.indexOfKey(stream) >= 0) {
404            gStreamOutputMap.replaceValueFor(stream, ioHandle);
405        }
406        break;
407    case OUTPUT_OPENED: {
408        if (gOutputs.indexOfKey(ioHandle) >= 0) {
409            ALOGV("ioConfigChanged() opening already existing output! %d", ioHandle);
410            break;
411        }
412        if (param2 == 0) break;
413        desc = (OutputDescriptor *)param2;
414
415        OutputDescriptor *outputDesc =  new OutputDescriptor(*desc);
416        gOutputs.add(ioHandle, outputDesc);
417        ALOGV("ioConfigChanged() new output samplingRate %d, format %d channels %d frameCount %d latency %d",
418                outputDesc->samplingRate, outputDesc->format, outputDesc->channels, outputDesc->frameCount, outputDesc->latency);
419        } break;
420    case OUTPUT_CLOSED: {
421        if (gOutputs.indexOfKey(ioHandle) < 0) {
422            ALOGW("ioConfigChanged() closing unknow output! %d", ioHandle);
423            break;
424        }
425        ALOGV("ioConfigChanged() output %d closed", ioHandle);
426
427        gOutputs.removeItem(ioHandle);
428        for (int i = gStreamOutputMap.size() - 1; i >= 0 ; i--) {
429            if (gStreamOutputMap.valueAt(i) == ioHandle) {
430                gStreamOutputMap.removeItemsAt(i);
431            }
432        }
433        } break;
434
435    case OUTPUT_CONFIG_CHANGED: {
436        int index = gOutputs.indexOfKey(ioHandle);
437        if (index < 0) {
438            ALOGW("ioConfigChanged() modifying unknow output! %d", ioHandle);
439            break;
440        }
441        if (param2 == 0) break;
442        desc = (OutputDescriptor *)param2;
443
444        ALOGV("ioConfigChanged() new config for output %d samplingRate %d, format %d channels %d frameCount %d latency %d",
445                ioHandle, desc->samplingRate, desc->format,
446                desc->channels, desc->frameCount, desc->latency);
447        OutputDescriptor *outputDesc = gOutputs.valueAt(index);
448        delete outputDesc;
449        outputDesc =  new OutputDescriptor(*desc);
450        gOutputs.replaceValueFor(ioHandle, outputDesc);
451    } break;
452    case INPUT_OPENED:
453    case INPUT_CLOSED:
454    case INPUT_CONFIG_CHANGED:
455        break;
456
457    }
458}
459
460void AudioSystem::setErrorCallback(audio_error_callback cb) {
461    Mutex::Autolock _l(gLock);
462    gAudioErrorCallback = cb;
463}
464
465bool AudioSystem::routedToA2dpOutput(int streamType) {
466    switch(streamType) {
467    case AUDIO_STREAM_MUSIC:
468    case AUDIO_STREAM_VOICE_CALL:
469    case AUDIO_STREAM_BLUETOOTH_SCO:
470    case AUDIO_STREAM_SYSTEM:
471        return true;
472    default:
473        return false;
474    }
475}
476
477
478// client singleton for AudioPolicyService binder interface
479sp<IAudioPolicyService> AudioSystem::gAudioPolicyService;
480sp<AudioSystem::AudioPolicyServiceClient> AudioSystem::gAudioPolicyServiceClient;
481
482
483// establish binder interface to AudioFlinger service
484const sp<IAudioPolicyService>& AudioSystem::get_audio_policy_service()
485{
486    gLock.lock();
487    if (gAudioPolicyService.get() == 0) {
488        sp<IServiceManager> sm = defaultServiceManager();
489        sp<IBinder> binder;
490        do {
491            binder = sm->getService(String16("media.audio_policy"));
492            if (binder != 0)
493                break;
494            ALOGW("AudioPolicyService not published, waiting...");
495            usleep(500000); // 0.5 s
496        } while(true);
497        if (gAudioPolicyServiceClient == NULL) {
498            gAudioPolicyServiceClient = new AudioPolicyServiceClient();
499        }
500        binder->linkToDeath(gAudioPolicyServiceClient);
501        gAudioPolicyService = interface_cast<IAudioPolicyService>(binder);
502        gLock.unlock();
503    } else {
504        gLock.unlock();
505    }
506    return gAudioPolicyService;
507}
508
509status_t AudioSystem::setDeviceConnectionState(audio_devices_t device,
510                                               audio_policy_dev_state_t state,
511                                               const char *device_address)
512{
513    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
514    const char *address = "";
515
516    if (aps == 0) return PERMISSION_DENIED;
517
518    if (device_address != NULL) {
519        address = device_address;
520    }
521
522    return aps->setDeviceConnectionState(device, state, address);
523}
524
525audio_policy_dev_state_t AudioSystem::getDeviceConnectionState(audio_devices_t device,
526                                                  const char *device_address)
527{
528    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
529    if (aps == 0) return AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE;
530
531    return aps->getDeviceConnectionState(device, device_address);
532}
533
534status_t AudioSystem::setPhoneState(int state)
535{
536    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
537    if (aps == 0) return PERMISSION_DENIED;
538
539    return aps->setPhoneState(state);
540}
541
542status_t AudioSystem::setRingerMode(uint32_t mode, uint32_t mask)
543{
544    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
545    if (aps == 0) return PERMISSION_DENIED;
546    return aps->setRingerMode(mode, mask);
547}
548
549status_t AudioSystem::setForceUse(audio_policy_force_use_t usage, audio_policy_forced_cfg_t config)
550{
551    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
552    if (aps == 0) return PERMISSION_DENIED;
553    return aps->setForceUse(usage, config);
554}
555
556audio_policy_forced_cfg_t AudioSystem::getForceUse(audio_policy_force_use_t usage)
557{
558    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
559    if (aps == 0) return AUDIO_POLICY_FORCE_NONE;
560    return aps->getForceUse(usage);
561}
562
563
564audio_io_handle_t AudioSystem::getOutput(audio_stream_type_t stream,
565                                    uint32_t samplingRate,
566                                    uint32_t format,
567                                    uint32_t channels,
568                                    audio_policy_output_flags_t flags)
569{
570    audio_io_handle_t output = 0;
571    // Do not use stream to output map cache if the direct output
572    // flag is set or if we are likely to use a direct output
573    // (e.g voice call stream @ 8kHz could use BT SCO device and be routed to
574    // a direct output on some platforms).
575    // TODO: the output cache and stream to output mapping implementation needs to
576    // be reworked for proper operation with direct outputs. This code is too specific
577    // to the first use case we want to cover (Voice Recognition and Voice Dialer over
578    // Bluetooth SCO
579    if ((flags & AUDIO_POLICY_OUTPUT_FLAG_DIRECT) == 0 &&
580        ((stream != AUDIO_STREAM_VOICE_CALL && stream != AUDIO_STREAM_BLUETOOTH_SCO) ||
581         channels != AUDIO_CHANNEL_OUT_MONO ||
582         (samplingRate != 8000 && samplingRate != 16000))) {
583        Mutex::Autolock _l(gLock);
584        output = AudioSystem::gStreamOutputMap.valueFor(stream);
585        ALOGV_IF((output != 0), "getOutput() read %d from cache for stream %d", output, stream);
586    }
587    if (output == 0) {
588        const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
589        if (aps == 0) return 0;
590        output = aps->getOutput(stream, samplingRate, format, channels, flags);
591        if ((flags & AUDIO_POLICY_OUTPUT_FLAG_DIRECT) == 0) {
592            Mutex::Autolock _l(gLock);
593            AudioSystem::gStreamOutputMap.add(stream, output);
594        }
595    }
596    return output;
597}
598
599status_t AudioSystem::startOutput(audio_io_handle_t output,
600                                  audio_stream_type_t stream,
601                                  int session)
602{
603    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
604    if (aps == 0) return PERMISSION_DENIED;
605    return aps->startOutput(output, stream, session);
606}
607
608status_t AudioSystem::stopOutput(audio_io_handle_t output,
609                                 audio_stream_type_t stream,
610                                 int session)
611{
612    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
613    if (aps == 0) return PERMISSION_DENIED;
614    return aps->stopOutput(output, stream, session);
615}
616
617void AudioSystem::releaseOutput(audio_io_handle_t output)
618{
619    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
620    if (aps == 0) return;
621    aps->releaseOutput(output);
622}
623
624audio_io_handle_t AudioSystem::getInput(int inputSource,
625                                    uint32_t samplingRate,
626                                    uint32_t format,
627                                    uint32_t channels,
628                                    audio_in_acoustics_t acoustics,
629                                    int sessionId)
630{
631    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
632    if (aps == 0) return 0;
633    return aps->getInput(inputSource, samplingRate, format, channels, acoustics, sessionId);
634}
635
636status_t AudioSystem::startInput(audio_io_handle_t input)
637{
638    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
639    if (aps == 0) return PERMISSION_DENIED;
640    return aps->startInput(input);
641}
642
643status_t AudioSystem::stopInput(audio_io_handle_t input)
644{
645    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
646    if (aps == 0) return PERMISSION_DENIED;
647    return aps->stopInput(input);
648}
649
650void AudioSystem::releaseInput(audio_io_handle_t input)
651{
652    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
653    if (aps == 0) return;
654    aps->releaseInput(input);
655}
656
657status_t AudioSystem::initStreamVolume(audio_stream_type_t stream,
658                                    int indexMin,
659                                    int indexMax)
660{
661    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
662    if (aps == 0) return PERMISSION_DENIED;
663    return aps->initStreamVolume(stream, indexMin, indexMax);
664}
665
666status_t AudioSystem::setStreamVolumeIndex(audio_stream_type_t stream, int index)
667{
668    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
669    if (aps == 0) return PERMISSION_DENIED;
670    return aps->setStreamVolumeIndex(stream, index);
671}
672
673status_t AudioSystem::getStreamVolumeIndex(audio_stream_type_t stream, int *index)
674{
675    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
676    if (aps == 0) return PERMISSION_DENIED;
677    return aps->getStreamVolumeIndex(stream, index);
678}
679
680uint32_t AudioSystem::getStrategyForStream(audio_stream_type_t stream)
681{
682    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
683    if (aps == 0) return 0;
684    return aps->getStrategyForStream(stream);
685}
686
687uint32_t AudioSystem::getDevicesForStream(audio_stream_type_t stream)
688{
689    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
690    if (aps == 0) return 0;
691    return aps->getDevicesForStream(stream);
692}
693
694audio_io_handle_t AudioSystem::getOutputForEffect(effect_descriptor_t *desc)
695{
696    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
697    if (aps == 0) return PERMISSION_DENIED;
698    return aps->getOutputForEffect(desc);
699}
700
701status_t AudioSystem::registerEffect(effect_descriptor_t *desc,
702                                audio_io_handle_t io,
703                                uint32_t strategy,
704                                int session,
705                                int id)
706{
707    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
708    if (aps == 0) return PERMISSION_DENIED;
709    return aps->registerEffect(desc, io, strategy, session, id);
710}
711
712status_t AudioSystem::unregisterEffect(int id)
713{
714    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
715    if (aps == 0) return PERMISSION_DENIED;
716    return aps->unregisterEffect(id);
717}
718
719status_t AudioSystem::setEffectEnabled(int id, bool enabled)
720{
721    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
722    if (aps == 0) return PERMISSION_DENIED;
723    return aps->setEffectEnabled(id, enabled);
724}
725
726status_t AudioSystem::isStreamActive(int stream, bool* state, uint32_t inPastMs)
727{
728    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
729    if (aps == 0) return PERMISSION_DENIED;
730    if (state == NULL) return BAD_VALUE;
731    *state = aps->isStreamActive(stream, inPastMs);
732    return NO_ERROR;
733}
734
735
736void AudioSystem::clearAudioConfigCache()
737{
738    Mutex::Autolock _l(gLock);
739    ALOGV("clearAudioConfigCache()");
740    gStreamOutputMap.clear();
741    gOutputs.clear();
742}
743
744// ---------------------------------------------------------------------------
745
746void AudioSystem::AudioPolicyServiceClient::binderDied(const wp<IBinder>& who) {
747    Mutex::Autolock _l(AudioSystem::gLock);
748    AudioSystem::gAudioPolicyService.clear();
749
750    ALOGW("AudioPolicyService server died!");
751}
752
753}; // namespace android
754
755