AudioSystem.cpp revision 7c7be1e05634d96d08210efb4bdeb012ffba440d 
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;
35sp<IAudioFlinger> AudioSystem::gAudioFlinger;
36sp<AudioSystem::AudioFlingerClient> AudioSystem::gAudioFlingerClient;
37audio_error_callback AudioSystem::gAudioErrorCallback = NULL;
38// Cached values
39
40DefaultKeyedVector<audio_io_handle_t, AudioSystem::OutputDescriptor *> AudioSystem::gOutputs(0);
41
42// Cached values for recording queries, all protected by gLock
43uint32_t AudioSystem::gPrevInSamplingRate = 16000;
44audio_format_t AudioSystem::gPrevInFormat = AUDIO_FORMAT_PCM_16_BIT;
45audio_channel_mask_t AudioSystem::gPrevInChannelMask = AUDIO_CHANNEL_IN_MONO;
46size_t AudioSystem::gInBuffSize = 0;
47
48
49// establish binder interface to AudioFlinger service
50const sp<IAudioFlinger>& AudioSystem::get_audio_flinger()
51{
52    Mutex::Autolock _l(gLock);
53    if (gAudioFlinger == 0) {
54        sp<IServiceManager> sm = defaultServiceManager();
55        sp<IBinder> binder;
56        do {
57            binder = sm->getService(String16("media.audio_flinger"));
58            if (binder != 0)
59                break;
60            ALOGW("AudioFlinger not published, waiting...");
61            usleep(500000); // 0.5 s
62        } while (true);
63        if (gAudioFlingerClient == NULL) {
64            gAudioFlingerClient = new AudioFlingerClient();
65        } else {
66            if (gAudioErrorCallback) {
67                gAudioErrorCallback(NO_ERROR);
68            }
69        }
70        binder->linkToDeath(gAudioFlingerClient);
71        gAudioFlinger = interface_cast<IAudioFlinger>(binder);
72        gAudioFlinger->registerClient(gAudioFlingerClient);
73    }
74    ALOGE_IF(gAudioFlinger==0, "no AudioFlinger!?");
75
76    return gAudioFlinger;
77}
78
79/* static */ status_t AudioSystem::checkAudioFlinger()
80{
81    if (defaultServiceManager()->checkService(String16("media.audio_flinger")) != 0) {
82        return NO_ERROR;
83    }
84    return DEAD_OBJECT;
85}
86
87status_t AudioSystem::muteMicrophone(bool state) {
88    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
89    if (af == 0) return PERMISSION_DENIED;
90    return af->setMicMute(state);
91}
92
93status_t AudioSystem::isMicrophoneMuted(bool* state) {
94    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
95    if (af == 0) return PERMISSION_DENIED;
96    *state = af->getMicMute();
97    return NO_ERROR;
98}
99
100status_t AudioSystem::setMasterVolume(float value)
101{
102    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
103    if (af == 0) return PERMISSION_DENIED;
104    af->setMasterVolume(value);
105    return NO_ERROR;
106}
107
108status_t AudioSystem::setMasterMute(bool mute)
109{
110    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
111    if (af == 0) return PERMISSION_DENIED;
112    af->setMasterMute(mute);
113    return NO_ERROR;
114}
115
116status_t AudioSystem::getMasterVolume(float* volume)
117{
118    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
119    if (af == 0) return PERMISSION_DENIED;
120    *volume = af->masterVolume();
121    return NO_ERROR;
122}
123
124status_t AudioSystem::getMasterMute(bool* mute)
125{
126    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
127    if (af == 0) return PERMISSION_DENIED;
128    *mute = af->masterMute();
129    return NO_ERROR;
130}
131
132status_t AudioSystem::setStreamVolume(audio_stream_type_t stream, float value,
133        audio_io_handle_t output)
134{
135    if (uint32_t(stream) >= AUDIO_STREAM_CNT) return BAD_VALUE;
136    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
137    if (af == 0) return PERMISSION_DENIED;
138    af->setStreamVolume(stream, value, output);
139    return NO_ERROR;
140}
141
142status_t AudioSystem::setStreamMute(audio_stream_type_t stream, bool mute)
143{
144    if (uint32_t(stream) >= AUDIO_STREAM_CNT) return BAD_VALUE;
145    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
146    if (af == 0) return PERMISSION_DENIED;
147    af->setStreamMute(stream, mute);
148    return NO_ERROR;
149}
150
151status_t AudioSystem::getStreamVolume(audio_stream_type_t stream, float* volume,
152        audio_io_handle_t output)
153{
154    if (uint32_t(stream) >= AUDIO_STREAM_CNT) return BAD_VALUE;
155    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
156    if (af == 0) return PERMISSION_DENIED;
157    *volume = af->streamVolume(stream, output);
158    return NO_ERROR;
159}
160
161status_t AudioSystem::getStreamMute(audio_stream_type_t stream, bool* mute)
162{
163    if (uint32_t(stream) >= AUDIO_STREAM_CNT) return BAD_VALUE;
164    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
165    if (af == 0) return PERMISSION_DENIED;
166    *mute = af->streamMute(stream);
167    return NO_ERROR;
168}
169
170status_t AudioSystem::setMode(audio_mode_t mode)
171{
172    if (uint32_t(mode) >= AUDIO_MODE_CNT) return BAD_VALUE;
173    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
174    if (af == 0) return PERMISSION_DENIED;
175    return af->setMode(mode);
176}
177
178status_t AudioSystem::setParameters(audio_io_handle_t ioHandle, const String8& keyValuePairs) {
179    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
180    if (af == 0) return PERMISSION_DENIED;
181    return af->setParameters(ioHandle, keyValuePairs);
182}
183
184String8 AudioSystem::getParameters(audio_io_handle_t ioHandle, const String8& keys) {
185    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
186    String8 result = String8("");
187    if (af == 0) return result;
188
189    result = af->getParameters(ioHandle, keys);
190    return result;
191}
192
193// convert volume steps to natural log scale
194
195// change this value to change volume scaling
196static const float dBPerStep = 0.5f;
197// shouldn't need to touch these
198static const float dBConvert = -dBPerStep * 2.302585093f / 20.0f;
199static const float dBConvertInverse = 1.0f / dBConvert;
200
201float AudioSystem::linearToLog(int volume)
202{
203    // float v = volume ? exp(float(100 - volume) * dBConvert) : 0;
204    // ALOGD("linearToLog(%d)=%f", volume, v);
205    // return v;
206    return volume ? exp(float(100 - volume) * dBConvert) : 0;
207}
208
209int AudioSystem::logToLinear(float volume)
210{
211    // int v = volume ? 100 - int(dBConvertInverse * log(volume) + 0.5) : 0;
212    // ALOGD("logTolinear(%d)=%f", v, volume);
213    // return v;
214    return volume ? 100 - int(dBConvertInverse * log(volume) + 0.5) : 0;
215}
216
217status_t AudioSystem::getOutputSamplingRate(uint32_t* samplingRate, audio_stream_type_t streamType)
218{
219    audio_io_handle_t output;
220
221    if (streamType == AUDIO_STREAM_DEFAULT) {
222        streamType = AUDIO_STREAM_MUSIC;
223    }
224
225    output = getOutput(streamType);
226    if (output == 0) {
227        return PERMISSION_DENIED;
228    }
229
230    return getSamplingRate(output, streamType, samplingRate);
231}
232
233status_t AudioSystem::getSamplingRate(audio_io_handle_t output,
234                                      audio_stream_type_t streamType,
235                                      uint32_t* samplingRate)
236{
237    OutputDescriptor *outputDesc;
238
239    gLock.lock();
240    outputDesc = AudioSystem::gOutputs.valueFor(output);
241    if (outputDesc == NULL) {
242        ALOGV("getOutputSamplingRate() no output descriptor for output %d in gOutputs", output);
243        gLock.unlock();
244        const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
245        if (af == 0) return PERMISSION_DENIED;
246        *samplingRate = af->sampleRate(output);
247    } else {
248        ALOGV("getOutputSamplingRate() reading from output desc");
249        *samplingRate = outputDesc->samplingRate;
250        gLock.unlock();
251    }
252
253    ALOGV("getSamplingRate() streamType %d, output %d, sampling rate %u", streamType, output,
254            *samplingRate);
255
256    return NO_ERROR;
257}
258
259status_t AudioSystem::getOutputFrameCount(size_t* frameCount, audio_stream_type_t streamType)
260{
261    audio_io_handle_t output;
262
263    if (streamType == AUDIO_STREAM_DEFAULT) {
264        streamType = AUDIO_STREAM_MUSIC;
265    }
266
267    output = getOutput(streamType);
268    if (output == 0) {
269        return PERMISSION_DENIED;
270    }
271
272    return getFrameCount(output, streamType, frameCount);
273}
274
275status_t AudioSystem::getFrameCount(audio_io_handle_t output,
276                                    audio_stream_type_t streamType,
277                                    size_t* frameCount)
278{
279    OutputDescriptor *outputDesc;
280
281    gLock.lock();
282    outputDesc = AudioSystem::gOutputs.valueFor(output);
283    if (outputDesc == NULL) {
284        gLock.unlock();
285        const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
286        if (af == 0) return PERMISSION_DENIED;
287        *frameCount = af->frameCount(output);
288    } else {
289        *frameCount = outputDesc->frameCount;
290        gLock.unlock();
291    }
292
293    ALOGV("getFrameCount() streamType %d, output %d, frameCount %d", streamType, output,
294            *frameCount);
295
296    return NO_ERROR;
297}
298
299status_t AudioSystem::getOutputLatency(uint32_t* latency, audio_stream_type_t streamType)
300{
301    audio_io_handle_t output;
302
303    if (streamType == AUDIO_STREAM_DEFAULT) {
304        streamType = AUDIO_STREAM_MUSIC;
305    }
306
307    output = getOutput(streamType);
308    if (output == 0) {
309        return PERMISSION_DENIED;
310    }
311
312    return getLatency(output, streamType, latency);
313}
314
315status_t AudioSystem::getLatency(audio_io_handle_t output,
316                                 audio_stream_type_t streamType,
317                                 uint32_t* latency)
318{
319    OutputDescriptor *outputDesc;
320
321    gLock.lock();
322    outputDesc = AudioSystem::gOutputs.valueFor(output);
323    if (outputDesc == NULL) {
324        gLock.unlock();
325        const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
326        if (af == 0) return PERMISSION_DENIED;
327        *latency = af->latency(output);
328    } else {
329        *latency = outputDesc->latency;
330        gLock.unlock();
331    }
332
333    ALOGV("getLatency() streamType %d, output %d, latency %d", streamType, output, *latency);
334
335    return NO_ERROR;
336}
337
338status_t AudioSystem::getInputBufferSize(uint32_t sampleRate, audio_format_t format,
339        audio_channel_mask_t channelMask, size_t* buffSize)
340{
341    gLock.lock();
342    // Do we have a stale gInBufferSize or are we requesting the input buffer size for new values
343    size_t inBuffSize = gInBuffSize;
344    if ((inBuffSize == 0) || (sampleRate != gPrevInSamplingRate) || (format != gPrevInFormat)
345        || (channelMask != gPrevInChannelMask)) {
346        gLock.unlock();
347        const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
348        if (af == 0) {
349            return PERMISSION_DENIED;
350        }
351        inBuffSize = af->getInputBufferSize(sampleRate, format, channelMask);
352        gLock.lock();
353        // save the request params
354        gPrevInSamplingRate = sampleRate;
355        gPrevInFormat = format;
356        gPrevInChannelMask = channelMask;
357
358        gInBuffSize = inBuffSize;
359    }
360    gLock.unlock();
361    *buffSize = inBuffSize;
362
363    return NO_ERROR;
364}
365
366status_t AudioSystem::setVoiceVolume(float value)
367{
368    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
369    if (af == 0) return PERMISSION_DENIED;
370    return af->setVoiceVolume(value);
371}
372
373status_t AudioSystem::getRenderPosition(audio_io_handle_t output, size_t *halFrames,
374                                        size_t *dspFrames, audio_stream_type_t stream)
375{
376    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
377    if (af == 0) return PERMISSION_DENIED;
378
379    if (stream == AUDIO_STREAM_DEFAULT) {
380        stream = AUDIO_STREAM_MUSIC;
381    }
382
383    if (output == 0) {
384        output = getOutput(stream);
385    }
386
387    return af->getRenderPosition(halFrames, dspFrames, output);
388}
389
390size_t AudioSystem::getInputFramesLost(audio_io_handle_t ioHandle) {
391    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
392    unsigned int result = 0;
393    if (af == 0) return result;
394    if (ioHandle == 0) return result;
395
396    result = af->getInputFramesLost(ioHandle);
397    return result;
398}
399
400int AudioSystem::newAudioSessionId() {
401    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
402    if (af == 0) return 0;
403    return af->newAudioSessionId();
404}
405
406void AudioSystem::acquireAudioSessionId(int audioSession) {
407    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
408    if (af != 0) {
409        af->acquireAudioSessionId(audioSession);
410    }
411}
412
413void AudioSystem::releaseAudioSessionId(int audioSession) {
414    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
415    if (af != 0) {
416        af->releaseAudioSessionId(audioSession);
417    }
418}
419
420// ---------------------------------------------------------------------------
421
422void AudioSystem::AudioFlingerClient::binderDied(const wp<IBinder>& who __unused) {
423    Mutex::Autolock _l(AudioSystem::gLock);
424
425    AudioSystem::gAudioFlinger.clear();
426    // clear output handles and stream to output map caches
427    AudioSystem::gOutputs.clear();
428
429    if (gAudioErrorCallback) {
430        gAudioErrorCallback(DEAD_OBJECT);
431    }
432    ALOGW("AudioFlinger server died!");
433}
434
435void AudioSystem::AudioFlingerClient::ioConfigChanged(int event, audio_io_handle_t ioHandle,
436        const void *param2) {
437    ALOGV("ioConfigChanged() event %d", event);
438    const OutputDescriptor *desc;
439    audio_stream_type_t stream;
440
441    if (ioHandle == 0) return;
442
443    Mutex::Autolock _l(AudioSystem::gLock);
444
445    switch (event) {
446    case STREAM_CONFIG_CHANGED:
447        break;
448    case OUTPUT_OPENED: {
449        if (gOutputs.indexOfKey(ioHandle) >= 0) {
450            ALOGV("ioConfigChanged() opening already existing output! %d", ioHandle);
451            break;
452        }
453        if (param2 == NULL) break;
454        desc = (const OutputDescriptor *)param2;
455
456        OutputDescriptor *outputDesc =  new OutputDescriptor(*desc);
457        gOutputs.add(ioHandle, outputDesc);
458        ALOGV("ioConfigChanged() new output samplingRate %u, format %d channel mask %#x frameCount %u "
459                "latency %d",
460                outputDesc->samplingRate, outputDesc->format, outputDesc->channelMask,
461                outputDesc->frameCount, outputDesc->latency);
462        } break;
463    case OUTPUT_CLOSED: {
464        if (gOutputs.indexOfKey(ioHandle) < 0) {
465            ALOGW("ioConfigChanged() closing unknown output! %d", ioHandle);
466            break;
467        }
468        ALOGV("ioConfigChanged() output %d closed", ioHandle);
469
470        gOutputs.removeItem(ioHandle);
471        } break;
472
473    case OUTPUT_CONFIG_CHANGED: {
474        int index = gOutputs.indexOfKey(ioHandle);
475        if (index < 0) {
476            ALOGW("ioConfigChanged() modifying unknown output! %d", ioHandle);
477            break;
478        }
479        if (param2 == NULL) break;
480        desc = (const OutputDescriptor *)param2;
481
482        ALOGV("ioConfigChanged() new config for output %d samplingRate %u, format %d channel mask %#x "
483                "frameCount %d latency %d",
484                ioHandle, desc->samplingRate, desc->format,
485                desc->channelMask, desc->frameCount, desc->latency);
486        OutputDescriptor *outputDesc = gOutputs.valueAt(index);
487        delete outputDesc;
488        outputDesc =  new OutputDescriptor(*desc);
489        gOutputs.replaceValueFor(ioHandle, outputDesc);
490    } break;
491    case INPUT_OPENED:
492    case INPUT_CLOSED:
493    case INPUT_CONFIG_CHANGED:
494        break;
495
496    }
497}
498
499void AudioSystem::setErrorCallback(audio_error_callback cb) {
500    Mutex::Autolock _l(gLock);
501    gAudioErrorCallback = cb;
502}
503
504bool AudioSystem::routedToA2dpOutput(audio_stream_type_t streamType) {
505    switch (streamType) {
506    case AUDIO_STREAM_MUSIC:
507    case AUDIO_STREAM_VOICE_CALL:
508    case AUDIO_STREAM_BLUETOOTH_SCO:
509    case AUDIO_STREAM_SYSTEM:
510        return true;
511    default:
512        return false;
513    }
514}
515
516
517// client singleton for AudioPolicyService binder interface
518sp<IAudioPolicyService> AudioSystem::gAudioPolicyService;
519sp<AudioSystem::AudioPolicyServiceClient> AudioSystem::gAudioPolicyServiceClient;
520
521
522// establish binder interface to AudioPolicy service
523const sp<IAudioPolicyService>& AudioSystem::get_audio_policy_service()
524{
525    gLock.lock();
526    if (gAudioPolicyService == 0) {
527        sp<IServiceManager> sm = defaultServiceManager();
528        sp<IBinder> binder;
529        do {
530            binder = sm->getService(String16("media.audio_policy"));
531            if (binder != 0)
532                break;
533            ALOGW("AudioPolicyService not published, waiting...");
534            usleep(500000); // 0.5 s
535        } while (true);
536        if (gAudioPolicyServiceClient == NULL) {
537            gAudioPolicyServiceClient = new AudioPolicyServiceClient();
538        }
539        binder->linkToDeath(gAudioPolicyServiceClient);
540        gAudioPolicyService = interface_cast<IAudioPolicyService>(binder);
541        gLock.unlock();
542    } else {
543        gLock.unlock();
544    }
545    return gAudioPolicyService;
546}
547
548// ---------------------------------------------------------------------------
549
550status_t AudioSystem::setDeviceConnectionState(audio_devices_t device,
551                                               audio_policy_dev_state_t state,
552                                               const char *device_address)
553{
554    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
555    const char *address = "";
556
557    if (aps == 0) return PERMISSION_DENIED;
558
559    if (device_address != NULL) {
560        address = device_address;
561    }
562
563    return aps->setDeviceConnectionState(device, state, address);
564}
565
566audio_policy_dev_state_t AudioSystem::getDeviceConnectionState(audio_devices_t device,
567                                                  const char *device_address)
568{
569    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
570    if (aps == 0) return AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE;
571
572    return aps->getDeviceConnectionState(device, device_address);
573}
574
575status_t AudioSystem::setPhoneState(audio_mode_t state)
576{
577    if (uint32_t(state) >= AUDIO_MODE_CNT) return BAD_VALUE;
578    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
579    if (aps == 0) return PERMISSION_DENIED;
580
581    return aps->setPhoneState(state);
582}
583
584status_t AudioSystem::setForceUse(audio_policy_force_use_t usage, audio_policy_forced_cfg_t config)
585{
586    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
587    if (aps == 0) return PERMISSION_DENIED;
588    return aps->setForceUse(usage, config);
589}
590
591audio_policy_forced_cfg_t AudioSystem::getForceUse(audio_policy_force_use_t usage)
592{
593    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
594    if (aps == 0) return AUDIO_POLICY_FORCE_NONE;
595    return aps->getForceUse(usage);
596}
597
598
599audio_io_handle_t AudioSystem::getOutput(audio_stream_type_t stream,
600                                    uint32_t samplingRate,
601                                    audio_format_t format,
602                                    audio_channel_mask_t channelMask,
603                                    audio_output_flags_t flags,
604                                    const audio_offload_info_t *offloadInfo)
605{
606    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
607    if (aps == 0) return 0;
608    return aps->getOutput(stream, samplingRate, format, channelMask, flags, offloadInfo);
609}
610
611status_t AudioSystem::startOutput(audio_io_handle_t output,
612                                  audio_stream_type_t stream,
613                                  int session)
614{
615    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
616    if (aps == 0) return PERMISSION_DENIED;
617    return aps->startOutput(output, stream, session);
618}
619
620status_t AudioSystem::stopOutput(audio_io_handle_t output,
621                                 audio_stream_type_t stream,
622                                 int session)
623{
624    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
625    if (aps == 0) return PERMISSION_DENIED;
626    return aps->stopOutput(output, stream, session);
627}
628
629void AudioSystem::releaseOutput(audio_io_handle_t output)
630{
631    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
632    if (aps == 0) return;
633    aps->releaseOutput(output);
634}
635
636audio_io_handle_t AudioSystem::getInput(audio_source_t inputSource,
637                                    uint32_t samplingRate,
638                                    audio_format_t format,
639                                    audio_channel_mask_t channelMask,
640                                    int sessionId)
641{
642    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
643    if (aps == 0) return 0;
644    return aps->getInput(inputSource, samplingRate, format, channelMask, sessionId);
645}
646
647status_t AudioSystem::startInput(audio_io_handle_t input)
648{
649    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
650    if (aps == 0) return PERMISSION_DENIED;
651    return aps->startInput(input);
652}
653
654status_t AudioSystem::stopInput(audio_io_handle_t input)
655{
656    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
657    if (aps == 0) return PERMISSION_DENIED;
658    return aps->stopInput(input);
659}
660
661void AudioSystem::releaseInput(audio_io_handle_t input)
662{
663    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
664    if (aps == 0) return;
665    aps->releaseInput(input);
666}
667
668status_t AudioSystem::initStreamVolume(audio_stream_type_t stream,
669                                    int indexMin,
670                                    int indexMax)
671{
672    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
673    if (aps == 0) return PERMISSION_DENIED;
674    return aps->initStreamVolume(stream, indexMin, indexMax);
675}
676
677status_t AudioSystem::setStreamVolumeIndex(audio_stream_type_t stream,
678                                           int index,
679                                           audio_devices_t device)
680{
681    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
682    if (aps == 0) return PERMISSION_DENIED;
683    return aps->setStreamVolumeIndex(stream, index, device);
684}
685
686status_t AudioSystem::getStreamVolumeIndex(audio_stream_type_t stream,
687                                           int *index,
688                                           audio_devices_t device)
689{
690    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
691    if (aps == 0) return PERMISSION_DENIED;
692    return aps->getStreamVolumeIndex(stream, index, device);
693}
694
695uint32_t AudioSystem::getStrategyForStream(audio_stream_type_t stream)
696{
697    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
698    if (aps == 0) return 0;
699    return aps->getStrategyForStream(stream);
700}
701
702audio_devices_t AudioSystem::getDevicesForStream(audio_stream_type_t stream)
703{
704    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
705    if (aps == 0) return (audio_devices_t)0;
706    return aps->getDevicesForStream(stream);
707}
708
709audio_io_handle_t AudioSystem::getOutputForEffect(const effect_descriptor_t *desc)
710{
711    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
712    if (aps == 0) return PERMISSION_DENIED;
713    return aps->getOutputForEffect(desc);
714}
715
716status_t AudioSystem::registerEffect(const effect_descriptor_t *desc,
717                                audio_io_handle_t io,
718                                uint32_t strategy,
719                                int session,
720                                int id)
721{
722    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
723    if (aps == 0) return PERMISSION_DENIED;
724    return aps->registerEffect(desc, io, strategy, session, id);
725}
726
727status_t AudioSystem::unregisterEffect(int id)
728{
729    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
730    if (aps == 0) return PERMISSION_DENIED;
731    return aps->unregisterEffect(id);
732}
733
734status_t AudioSystem::setEffectEnabled(int id, bool enabled)
735{
736    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
737    if (aps == 0) return PERMISSION_DENIED;
738    return aps->setEffectEnabled(id, enabled);
739}
740
741status_t AudioSystem::isStreamActive(audio_stream_type_t stream, bool* state, uint32_t inPastMs)
742{
743    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
744    if (aps == 0) return PERMISSION_DENIED;
745    if (state == NULL) return BAD_VALUE;
746    *state = aps->isStreamActive(stream, inPastMs);
747    return NO_ERROR;
748}
749
750status_t AudioSystem::isStreamActiveRemotely(audio_stream_type_t stream, bool* state,
751        uint32_t inPastMs)
752{
753    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
754    if (aps == 0) return PERMISSION_DENIED;
755    if (state == NULL) return BAD_VALUE;
756    *state = aps->isStreamActiveRemotely(stream, inPastMs);
757    return NO_ERROR;
758}
759
760status_t AudioSystem::isSourceActive(audio_source_t stream, bool* state)
761{
762    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
763    if (aps == 0) return PERMISSION_DENIED;
764    if (state == NULL) return BAD_VALUE;
765    *state = aps->isSourceActive(stream);
766    return NO_ERROR;
767}
768
769uint32_t AudioSystem::getPrimaryOutputSamplingRate()
770{
771    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
772    if (af == 0) return 0;
773    return af->getPrimaryOutputSamplingRate();
774}
775
776size_t AudioSystem::getPrimaryOutputFrameCount()
777{
778    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
779    if (af == 0) return 0;
780    return af->getPrimaryOutputFrameCount();
781}
782
783status_t AudioSystem::setLowRamDevice(bool isLowRamDevice)
784{
785    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
786    if (af == 0) return PERMISSION_DENIED;
787    return af->setLowRamDevice(isLowRamDevice);
788}
789
790void AudioSystem::clearAudioConfigCache()
791{
792    Mutex::Autolock _l(gLock);
793    ALOGV("clearAudioConfigCache()");
794    gOutputs.clear();
795}
796
797bool AudioSystem::isOffloadSupported(const audio_offload_info_t& info)
798{
799    ALOGV("isOffloadSupported()");
800    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
801    if (aps == 0) return false;
802    return aps->isOffloadSupported(info);
803}
804
805// ---------------------------------------------------------------------------
806
807void AudioSystem::AudioPolicyServiceClient::binderDied(const wp<IBinder>& who __unused) {
808    Mutex::Autolock _l(AudioSystem::gLock);
809    AudioSystem::gAudioPolicyService.clear();
810
811    ALOGW("AudioPolicyService server died!");
812}
813
814}; // namespace android
815