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 // ----------------------------------------------------------------------------
27 // the sim build doesn't have gettid
28
29 #ifndef HAVE_GETTID
30 # define gettid getpid
31 #endif
32
33 // ----------------------------------------------------------------------------
34
35 namespace android {
36
37 // client singleton for AudioFlinger binder interface
38 Mutex AudioSystem::gLock;
39 sp<IAudioFlinger> AudioSystem::gAudioFlinger;
40 sp<AudioSystem::AudioFlingerClient> AudioSystem::gAudioFlingerClient;
41 audio_error_callback AudioSystem::gAudioErrorCallback = NULL;
42 // Cached values
43 DefaultKeyedVector<int, audio_io_handle_t> AudioSystem::gStreamOutputMap(0);
44 DefaultKeyedVector<audio_io_handle_t, AudioSystem::OutputDescriptor *> AudioSystem::gOutputs(0);
45
46 // Cached values for recording queries
47 uint32_t AudioSystem::gPrevInSamplingRate = 16000;
48 int AudioSystem::gPrevInFormat = AudioSystem::PCM_16_BIT;
49 int AudioSystem::gPrevInChannelCount = 1;
50 size_t AudioSystem::gInBuffSize = 0;
51
52
53 // establish binder interface to AudioFlinger service
get_audio_flinger()54 const sp<IAudioFlinger>& AudioSystem::get_audio_flinger()
55 {
56 Mutex::Autolock _l(gLock);
57 if (gAudioFlinger.get() == 0) {
58 sp<IServiceManager> sm = defaultServiceManager();
59 sp<IBinder> binder;
60 do {
61 binder = sm->getService(String16("media.audio_flinger"));
62 if (binder != 0)
63 break;
64 LOGW("AudioFlinger not published, waiting...");
65 usleep(500000); // 0.5 s
66 } while(true);
67 if (gAudioFlingerClient == NULL) {
68 gAudioFlingerClient = new AudioFlingerClient();
69 } else {
70 if (gAudioErrorCallback) {
71 gAudioErrorCallback(NO_ERROR);
72 }
73 }
74 binder->linkToDeath(gAudioFlingerClient);
75 gAudioFlinger = interface_cast<IAudioFlinger>(binder);
76 gAudioFlinger->registerClient(gAudioFlingerClient);
77 }
78 LOGE_IF(gAudioFlinger==0, "no AudioFlinger!?");
79
80 return gAudioFlinger;
81 }
82
muteMicrophone(bool state)83 status_t AudioSystem::muteMicrophone(bool state) {
84 const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
85 if (af == 0) return PERMISSION_DENIED;
86 return af->setMicMute(state);
87 }
88
isMicrophoneMuted(bool * state)89 status_t AudioSystem::isMicrophoneMuted(bool* state) {
90 const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
91 if (af == 0) return PERMISSION_DENIED;
92 *state = af->getMicMute();
93 return NO_ERROR;
94 }
95
setMasterVolume(float value)96 status_t AudioSystem::setMasterVolume(float value)
97 {
98 const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
99 if (af == 0) return PERMISSION_DENIED;
100 af->setMasterVolume(value);
101 return NO_ERROR;
102 }
103
setMasterMute(bool mute)104 status_t AudioSystem::setMasterMute(bool mute)
105 {
106 const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
107 if (af == 0) return PERMISSION_DENIED;
108 af->setMasterMute(mute);
109 return NO_ERROR;
110 }
111
getMasterVolume(float * volume)112 status_t AudioSystem::getMasterVolume(float* volume)
113 {
114 const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
115 if (af == 0) return PERMISSION_DENIED;
116 *volume = af->masterVolume();
117 return NO_ERROR;
118 }
119
getMasterMute(bool * mute)120 status_t AudioSystem::getMasterMute(bool* mute)
121 {
122 const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
123 if (af == 0) return PERMISSION_DENIED;
124 *mute = af->masterMute();
125 return NO_ERROR;
126 }
127
setStreamVolume(int stream,float value,int output)128 status_t AudioSystem::setStreamVolume(int stream, float value, int output)
129 {
130 if (uint32_t(stream) >= NUM_STREAM_TYPES) return BAD_VALUE;
131 const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
132 if (af == 0) return PERMISSION_DENIED;
133 af->setStreamVolume(stream, value, output);
134 return NO_ERROR;
135 }
136
setStreamMute(int stream,bool mute)137 status_t AudioSystem::setStreamMute(int stream, bool mute)
138 {
139 if (uint32_t(stream) >= NUM_STREAM_TYPES) return BAD_VALUE;
140 const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
141 if (af == 0) return PERMISSION_DENIED;
142 af->setStreamMute(stream, mute);
143 return NO_ERROR;
144 }
145
getStreamVolume(int stream,float * volume,int output)146 status_t AudioSystem::getStreamVolume(int stream, float* volume, int output)
147 {
148 if (uint32_t(stream) >= NUM_STREAM_TYPES) return BAD_VALUE;
149 const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
150 if (af == 0) return PERMISSION_DENIED;
151 *volume = af->streamVolume(stream, output);
152 return NO_ERROR;
153 }
154
getStreamMute(int stream,bool * mute)155 status_t AudioSystem::getStreamMute(int stream, bool* mute)
156 {
157 if (uint32_t(stream) >= NUM_STREAM_TYPES) return BAD_VALUE;
158 const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
159 if (af == 0) return PERMISSION_DENIED;
160 *mute = af->streamMute(stream);
161 return NO_ERROR;
162 }
163
setMode(int mode)164 status_t AudioSystem::setMode(int mode)
165 {
166 if (mode >= NUM_MODES) return BAD_VALUE;
167 const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
168 if (af == 0) return PERMISSION_DENIED;
169 return af->setMode(mode);
170 }
171
172
isStreamActive(int stream,bool * state)173 status_t AudioSystem::isStreamActive(int stream, bool* state) {
174 const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
175 if (af == 0) return PERMISSION_DENIED;
176 *state = af->isStreamActive(stream);
177 return NO_ERROR;
178 }
179
180
setParameters(audio_io_handle_t ioHandle,const String8 & keyValuePairs)181 status_t AudioSystem::setParameters(audio_io_handle_t ioHandle, const String8& keyValuePairs) {
182 const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
183 if (af == 0) return PERMISSION_DENIED;
184 return af->setParameters(ioHandle, keyValuePairs);
185 }
186
getParameters(audio_io_handle_t ioHandle,const String8 & keys)187 String8 AudioSystem::getParameters(audio_io_handle_t ioHandle, const String8& keys) {
188 const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
189 String8 result = String8("");
190 if (af == 0) return result;
191
192 result = af->getParameters(ioHandle, keys);
193 return result;
194 }
195
196 // convert volume steps to natural log scale
197
198 // change this value to change volume scaling
199 static const float dBPerStep = 0.5f;
200 // shouldn't need to touch these
201 static const float dBConvert = -dBPerStep * 2.302585093f / 20.0f;
202 static const float dBConvertInverse = 1.0f / dBConvert;
203
linearToLog(int volume)204 float AudioSystem::linearToLog(int volume)
205 {
206 // float v = volume ? exp(float(100 - volume) * dBConvert) : 0;
207 // LOGD("linearToLog(%d)=%f", volume, v);
208 // return v;
209 return volume ? exp(float(100 - volume) * dBConvert) : 0;
210 }
211
logToLinear(float volume)212 int AudioSystem::logToLinear(float volume)
213 {
214 // int v = volume ? 100 - int(dBConvertInverse * log(volume) + 0.5) : 0;
215 // LOGD("logTolinear(%d)=%f", v, volume);
216 // return v;
217 return volume ? 100 - int(dBConvertInverse * log(volume) + 0.5) : 0;
218 }
219
getOutputSamplingRate(int * samplingRate,int streamType)220 status_t AudioSystem::getOutputSamplingRate(int* samplingRate, int streamType)
221 {
222 OutputDescriptor *outputDesc;
223 audio_io_handle_t output;
224
225 if (streamType == DEFAULT) {
226 streamType = MUSIC;
227 }
228
229 output = getOutput((stream_type)streamType);
230 if (output == 0) {
231 return PERMISSION_DENIED;
232 }
233
234 gLock.lock();
235 outputDesc = AudioSystem::gOutputs.valueFor(output);
236 if (outputDesc == 0) {
237 LOGV("getOutputSamplingRate() no output descriptor for output %d in gOutputs", output);
238 gLock.unlock();
239 const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
240 if (af == 0) return PERMISSION_DENIED;
241 *samplingRate = af->sampleRate(output);
242 } else {
243 LOGV("getOutputSamplingRate() reading from output desc");
244 *samplingRate = outputDesc->samplingRate;
245 gLock.unlock();
246 }
247
248 LOGV("getOutputSamplingRate() streamType %d, output %d, sampling rate %d", streamType, output, *samplingRate);
249
250 return NO_ERROR;
251 }
252
getOutputFrameCount(int * frameCount,int streamType)253 status_t AudioSystem::getOutputFrameCount(int* frameCount, int streamType)
254 {
255 OutputDescriptor *outputDesc;
256 audio_io_handle_t output;
257
258 if (streamType == DEFAULT) {
259 streamType = MUSIC;
260 }
261
262 output = getOutput((stream_type)streamType);
263 if (output == 0) {
264 return PERMISSION_DENIED;
265 }
266
267 gLock.lock();
268 outputDesc = AudioSystem::gOutputs.valueFor(output);
269 if (outputDesc == 0) {
270 gLock.unlock();
271 const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
272 if (af == 0) return PERMISSION_DENIED;
273 *frameCount = af->frameCount(output);
274 } else {
275 *frameCount = outputDesc->frameCount;
276 gLock.unlock();
277 }
278
279 LOGV("getOutputFrameCount() streamType %d, output %d, frameCount %d", streamType, output, *frameCount);
280
281 return NO_ERROR;
282 }
283
getOutputLatency(uint32_t * latency,int streamType)284 status_t AudioSystem::getOutputLatency(uint32_t* latency, int streamType)
285 {
286 OutputDescriptor *outputDesc;
287 audio_io_handle_t output;
288
289 if (streamType == DEFAULT) {
290 streamType = MUSIC;
291 }
292
293 output = getOutput((stream_type)streamType);
294 if (output == 0) {
295 return PERMISSION_DENIED;
296 }
297
298 gLock.lock();
299 outputDesc = AudioSystem::gOutputs.valueFor(output);
300 if (outputDesc == 0) {
301 gLock.unlock();
302 const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
303 if (af == 0) return PERMISSION_DENIED;
304 *latency = af->latency(output);
305 } else {
306 *latency = outputDesc->latency;
307 gLock.unlock();
308 }
309
310 LOGV("getOutputLatency() streamType %d, output %d, latency %d", streamType, output, *latency);
311
312 return NO_ERROR;
313 }
314
getInputBufferSize(uint32_t sampleRate,int format,int channelCount,size_t * buffSize)315 status_t AudioSystem::getInputBufferSize(uint32_t sampleRate, int format, int channelCount,
316 size_t* buffSize)
317 {
318 // Do we have a stale gInBufferSize or are we requesting the input buffer size for new values
319 if ((gInBuffSize == 0) || (sampleRate != gPrevInSamplingRate) || (format != gPrevInFormat)
320 || (channelCount != gPrevInChannelCount)) {
321 // save the request params
322 gPrevInSamplingRate = sampleRate;
323 gPrevInFormat = format;
324 gPrevInChannelCount = channelCount;
325
326 gInBuffSize = 0;
327 const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
328 if (af == 0) {
329 return PERMISSION_DENIED;
330 }
331 gInBuffSize = af->getInputBufferSize(sampleRate, format, channelCount);
332 }
333 *buffSize = gInBuffSize;
334
335 return NO_ERROR;
336 }
337
setVoiceVolume(float value)338 status_t AudioSystem::setVoiceVolume(float value)
339 {
340 const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
341 if (af == 0) return PERMISSION_DENIED;
342 return af->setVoiceVolume(value);
343 }
344
getRenderPosition(uint32_t * halFrames,uint32_t * dspFrames,int stream)345 status_t AudioSystem::getRenderPosition(uint32_t *halFrames, uint32_t *dspFrames, int stream)
346 {
347 const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
348 if (af == 0) return PERMISSION_DENIED;
349
350 if (stream == DEFAULT) {
351 stream = MUSIC;
352 }
353
354 return af->getRenderPosition(halFrames, dspFrames, getOutput((stream_type)stream));
355 }
356
getInputFramesLost(audio_io_handle_t ioHandle)357 unsigned int AudioSystem::getInputFramesLost(audio_io_handle_t ioHandle) {
358 const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
359 unsigned int result = 0;
360 if (af == 0) return result;
361 if (ioHandle == 0) return result;
362
363 result = af->getInputFramesLost(ioHandle);
364 return result;
365 }
366
newAudioSessionId()367 int AudioSystem::newAudioSessionId() {
368 const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
369 if (af == 0) return 0;
370 return af->newAudioSessionId();
371 }
372
373 // ---------------------------------------------------------------------------
374
binderDied(const wp<IBinder> & who)375 void 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 LOGW("AudioFlinger server died!");
387 }
388
ioConfigChanged(int event,int ioHandle,void * param2)389 void AudioSystem::AudioFlingerClient::ioConfigChanged(int event, int ioHandle, void *param2) {
390 LOGV("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 LOGV("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 LOGV("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 LOGV("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 LOGW("ioConfigChanged() closing unknow output! %d", ioHandle);
423 break;
424 }
425 LOGV("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 LOGW("ioConfigChanged() modifying unknow output! %d", ioHandle);
439 break;
440 }
441 if (param2 == 0) break;
442 desc = (OutputDescriptor *)param2;
443
444 LOGV("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
setErrorCallback(audio_error_callback cb)460 void AudioSystem::setErrorCallback(audio_error_callback cb) {
461 Mutex::Autolock _l(gLock);
462 gAudioErrorCallback = cb;
463 }
464
routedToA2dpOutput(int streamType)465 bool AudioSystem::routedToA2dpOutput(int streamType) {
466 switch(streamType) {
467 case MUSIC:
468 case VOICE_CALL:
469 case BLUETOOTH_SCO:
470 case SYSTEM:
471 return true;
472 default:
473 return false;
474 }
475 }
476
477
478 // client singleton for AudioPolicyService binder interface
479 sp<IAudioPolicyService> AudioSystem::gAudioPolicyService;
480 sp<AudioSystem::AudioPolicyServiceClient> AudioSystem::gAudioPolicyServiceClient;
481
482
483 // establish binder interface to AudioFlinger service
get_audio_policy_service()484 const 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 LOGW("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
setDeviceConnectionState(audio_devices device,device_connection_state state,const char * device_address)509 status_t AudioSystem::setDeviceConnectionState(audio_devices device,
510 device_connection_state state,
511 const char *device_address)
512 {
513 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
514 if (aps == 0) return PERMISSION_DENIED;
515
516 return aps->setDeviceConnectionState(device, state, device_address);
517 }
518
getDeviceConnectionState(audio_devices device,const char * device_address)519 AudioSystem::device_connection_state AudioSystem::getDeviceConnectionState(audio_devices device,
520 const char *device_address)
521 {
522 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
523 if (aps == 0) return DEVICE_STATE_UNAVAILABLE;
524
525 return aps->getDeviceConnectionState(device, device_address);
526 }
527
setPhoneState(int state)528 status_t AudioSystem::setPhoneState(int state)
529 {
530 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
531 if (aps == 0) return PERMISSION_DENIED;
532
533 return aps->setPhoneState(state);
534 }
535
setRingerMode(uint32_t mode,uint32_t mask)536 status_t AudioSystem::setRingerMode(uint32_t mode, uint32_t mask)
537 {
538 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
539 if (aps == 0) return PERMISSION_DENIED;
540 return aps->setRingerMode(mode, mask);
541 }
542
setForceUse(force_use usage,forced_config config)543 status_t AudioSystem::setForceUse(force_use usage, forced_config config)
544 {
545 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
546 if (aps == 0) return PERMISSION_DENIED;
547 return aps->setForceUse(usage, config);
548 }
549
getForceUse(force_use usage)550 AudioSystem::forced_config AudioSystem::getForceUse(force_use usage)
551 {
552 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
553 if (aps == 0) return FORCE_NONE;
554 return aps->getForceUse(usage);
555 }
556
557
getOutput(stream_type stream,uint32_t samplingRate,uint32_t format,uint32_t channels,output_flags flags)558 audio_io_handle_t AudioSystem::getOutput(stream_type stream,
559 uint32_t samplingRate,
560 uint32_t format,
561 uint32_t channels,
562 output_flags flags)
563 {
564 audio_io_handle_t output = 0;
565 // Do not use stream to output map cache if the direct output
566 // flag is set or if we are likely to use a direct output
567 // (e.g voice call stream @ 8kHz could use BT SCO device and be routed to
568 // a direct output on some platforms).
569 // TODO: the output cache and stream to output mapping implementation needs to
570 // be reworked for proper operation with direct outputs. This code is too specific
571 // to the first use case we want to cover (Voice Recognition and Voice Dialer over
572 // Bluetooth SCO
573 if ((flags & AudioSystem::OUTPUT_FLAG_DIRECT) == 0 &&
574 ((stream != AudioSystem::VOICE_CALL && stream != AudioSystem::BLUETOOTH_SCO) ||
575 channels != AudioSystem::CHANNEL_OUT_MONO ||
576 (samplingRate != 8000 && samplingRate != 16000))) {
577 Mutex::Autolock _l(gLock);
578 output = AudioSystem::gStreamOutputMap.valueFor(stream);
579 LOGV_IF((output != 0), "getOutput() read %d from cache for stream %d", output, stream);
580 }
581 if (output == 0) {
582 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
583 if (aps == 0) return 0;
584 output = aps->getOutput(stream, samplingRate, format, channels, flags);
585 if ((flags & AudioSystem::OUTPUT_FLAG_DIRECT) == 0) {
586 Mutex::Autolock _l(gLock);
587 AudioSystem::gStreamOutputMap.add(stream, output);
588 }
589 }
590 return output;
591 }
592
startOutput(audio_io_handle_t output,AudioSystem::stream_type stream,int session)593 status_t AudioSystem::startOutput(audio_io_handle_t output,
594 AudioSystem::stream_type stream,
595 int session)
596 {
597 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
598 if (aps == 0) return PERMISSION_DENIED;
599 return aps->startOutput(output, stream, session);
600 }
601
stopOutput(audio_io_handle_t output,AudioSystem::stream_type stream,int session)602 status_t AudioSystem::stopOutput(audio_io_handle_t output,
603 AudioSystem::stream_type stream,
604 int session)
605 {
606 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
607 if (aps == 0) return PERMISSION_DENIED;
608 return aps->stopOutput(output, stream, session);
609 }
610
releaseOutput(audio_io_handle_t output)611 void AudioSystem::releaseOutput(audio_io_handle_t output)
612 {
613 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
614 if (aps == 0) return;
615 aps->releaseOutput(output);
616 }
617
getInput(int inputSource,uint32_t samplingRate,uint32_t format,uint32_t channels,audio_in_acoustics acoustics)618 audio_io_handle_t AudioSystem::getInput(int inputSource,
619 uint32_t samplingRate,
620 uint32_t format,
621 uint32_t channels,
622 audio_in_acoustics acoustics)
623 {
624 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
625 if (aps == 0) return 0;
626 return aps->getInput(inputSource, samplingRate, format, channels, acoustics);
627 }
628
startInput(audio_io_handle_t input)629 status_t AudioSystem::startInput(audio_io_handle_t input)
630 {
631 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
632 if (aps == 0) return PERMISSION_DENIED;
633 return aps->startInput(input);
634 }
635
stopInput(audio_io_handle_t input)636 status_t AudioSystem::stopInput(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->stopInput(input);
641 }
642
releaseInput(audio_io_handle_t input)643 void AudioSystem::releaseInput(audio_io_handle_t input)
644 {
645 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
646 if (aps == 0) return;
647 aps->releaseInput(input);
648 }
649
initStreamVolume(stream_type stream,int indexMin,int indexMax)650 status_t AudioSystem::initStreamVolume(stream_type stream,
651 int indexMin,
652 int indexMax)
653 {
654 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
655 if (aps == 0) return PERMISSION_DENIED;
656 return aps->initStreamVolume(stream, indexMin, indexMax);
657 }
658
setStreamVolumeIndex(stream_type stream,int index)659 status_t AudioSystem::setStreamVolumeIndex(stream_type stream, int index)
660 {
661 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
662 if (aps == 0) return PERMISSION_DENIED;
663 return aps->setStreamVolumeIndex(stream, index);
664 }
665
getStreamVolumeIndex(stream_type stream,int * index)666 status_t AudioSystem::getStreamVolumeIndex(stream_type stream, int *index)
667 {
668 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
669 if (aps == 0) return PERMISSION_DENIED;
670 return aps->getStreamVolumeIndex(stream, index);
671 }
672
getStrategyForStream(AudioSystem::stream_type stream)673 uint32_t AudioSystem::getStrategyForStream(AudioSystem::stream_type stream)
674 {
675 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
676 if (aps == 0) return 0;
677 return aps->getStrategyForStream(stream);
678 }
679
getOutputForEffect(effect_descriptor_t * desc)680 audio_io_handle_t AudioSystem::getOutputForEffect(effect_descriptor_t *desc)
681 {
682 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
683 if (aps == 0) return PERMISSION_DENIED;
684 return aps->getOutputForEffect(desc);
685 }
686
registerEffect(effect_descriptor_t * desc,audio_io_handle_t output,uint32_t strategy,int session,int id)687 status_t AudioSystem::registerEffect(effect_descriptor_t *desc,
688 audio_io_handle_t output,
689 uint32_t strategy,
690 int session,
691 int id)
692 {
693 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
694 if (aps == 0) return PERMISSION_DENIED;
695 return aps->registerEffect(desc, output, strategy, session, id);
696 }
697
unregisterEffect(int id)698 status_t AudioSystem::unregisterEffect(int id)
699 {
700 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
701 if (aps == 0) return PERMISSION_DENIED;
702 return aps->unregisterEffect(id);
703 }
704
705 // ---------------------------------------------------------------------------
706
binderDied(const wp<IBinder> & who)707 void AudioSystem::AudioPolicyServiceClient::binderDied(const wp<IBinder>& who) {
708 Mutex::Autolock _l(AudioSystem::gLock);
709 AudioSystem::gAudioPolicyService.clear();
710
711 LOGW("AudioPolicyService server died!");
712 }
713
714 // ---------------------------------------------------------------------------
715
716
717 // use emulated popcount optimization
718 // http://www.df.lth.se/~john_e/gems/gem002d.html
popCount(uint32_t u)719 uint32_t AudioSystem::popCount(uint32_t u)
720 {
721 u = ((u&0x55555555) + ((u>>1)&0x55555555));
722 u = ((u&0x33333333) + ((u>>2)&0x33333333));
723 u = ((u&0x0f0f0f0f) + ((u>>4)&0x0f0f0f0f));
724 u = ((u&0x00ff00ff) + ((u>>8)&0x00ff00ff));
725 u = ( u&0x0000ffff) + (u>>16);
726 return u;
727 }
728
isOutputDevice(audio_devices device)729 bool AudioSystem::isOutputDevice(audio_devices device)
730 {
731 if ((popCount(device) == 1 ) &&
732 ((device & ~AudioSystem::DEVICE_OUT_ALL) == 0)) {
733 return true;
734 } else {
735 return false;
736 }
737 }
738
isInputDevice(audio_devices device)739 bool AudioSystem::isInputDevice(audio_devices device)
740 {
741 if ((popCount(device) == 1 ) &&
742 ((device & ~AudioSystem::DEVICE_IN_ALL) == 0)) {
743 return true;
744 } else {
745 return false;
746 }
747 }
748
isA2dpDevice(audio_devices device)749 bool AudioSystem::isA2dpDevice(audio_devices device)
750 {
751 if ((popCount(device) == 1 ) &&
752 (device & (AudioSystem::DEVICE_OUT_BLUETOOTH_A2DP |
753 AudioSystem::DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES |
754 AudioSystem::DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER))) {
755 return true;
756 } else {
757 return false;
758 }
759 }
760
isBluetoothScoDevice(audio_devices device)761 bool AudioSystem::isBluetoothScoDevice(audio_devices device)
762 {
763 if ((popCount(device) == 1 ) &&
764 (device & (AudioSystem::DEVICE_OUT_BLUETOOTH_SCO |
765 AudioSystem::DEVICE_OUT_BLUETOOTH_SCO_HEADSET |
766 AudioSystem::DEVICE_OUT_BLUETOOTH_SCO_CARKIT |
767 AudioSystem::DEVICE_IN_BLUETOOTH_SCO_HEADSET))) {
768 return true;
769 } else {
770 return false;
771 }
772 }
773
isLowVisibility(stream_type stream)774 bool AudioSystem::isLowVisibility(stream_type stream)
775 {
776 if (stream == AudioSystem::SYSTEM ||
777 stream == AudioSystem::NOTIFICATION ||
778 stream == AudioSystem::RING) {
779 return true;
780 } else {
781 return false;
782 }
783 }
784
isInputChannel(uint32_t channel)785 bool AudioSystem::isInputChannel(uint32_t channel)
786 {
787 if ((channel & ~AudioSystem::CHANNEL_IN_ALL) == 0) {
788 return true;
789 } else {
790 return false;
791 }
792 }
793
isOutputChannel(uint32_t channel)794 bool AudioSystem::isOutputChannel(uint32_t channel)
795 {
796 if ((channel & ~AudioSystem::CHANNEL_OUT_ALL) == 0) {
797 return true;
798 } else {
799 return false;
800 }
801 }
802
isValidFormat(uint32_t format)803 bool AudioSystem::isValidFormat(uint32_t format)
804 {
805 switch (format & MAIN_FORMAT_MASK) {
806 case PCM:
807 case MP3:
808 case AMR_NB:
809 case AMR_WB:
810 case AAC:
811 case HE_AAC_V1:
812 case HE_AAC_V2:
813 case VORBIS:
814 return true;
815 default:
816 return false;
817 }
818 }
819
isLinearPCM(uint32_t format)820 bool AudioSystem::isLinearPCM(uint32_t format)
821 {
822 switch (format) {
823 case PCM_16_BIT:
824 case PCM_8_BIT:
825 return true;
826 default:
827 return false;
828 }
829 }
830
831 //------------------------- AudioParameter class implementation ---------------
832
833 const char *AudioParameter::keyRouting = "routing";
834 const char *AudioParameter::keySamplingRate = "sampling_rate";
835 const char *AudioParameter::keyFormat = "format";
836 const char *AudioParameter::keyChannels = "channels";
837 const char *AudioParameter::keyFrameCount = "frame_count";
838 const char *AudioParameter::keyInputSource = "input_source";
839
AudioParameter(const String8 & keyValuePairs)840 AudioParameter::AudioParameter(const String8& keyValuePairs)
841 {
842 char *str = new char[keyValuePairs.length()+1];
843 mKeyValuePairs = keyValuePairs;
844
845 strcpy(str, keyValuePairs.string());
846 char *pair = strtok(str, ";");
847 while (pair != NULL) {
848 if (strlen(pair) != 0) {
849 size_t eqIdx = strcspn(pair, "=");
850 String8 key = String8(pair, eqIdx);
851 String8 value;
852 if (eqIdx == strlen(pair)) {
853 value = String8("");
854 } else {
855 value = String8(pair + eqIdx + 1);
856 }
857 if (mParameters.indexOfKey(key) < 0) {
858 mParameters.add(key, value);
859 } else {
860 mParameters.replaceValueFor(key, value);
861 }
862 } else {
863 LOGV("AudioParameter() cstor empty key value pair");
864 }
865 pair = strtok(NULL, ";");
866 }
867
868 delete[] str;
869 }
870
~AudioParameter()871 AudioParameter::~AudioParameter()
872 {
873 mParameters.clear();
874 }
875
toString()876 String8 AudioParameter::toString()
877 {
878 String8 str = String8("");
879
880 size_t size = mParameters.size();
881 for (size_t i = 0; i < size; i++) {
882 str += mParameters.keyAt(i);
883 str += "=";
884 str += mParameters.valueAt(i);
885 if (i < (size - 1)) str += ";";
886 }
887 return str;
888 }
889
add(const String8 & key,const String8 & value)890 status_t AudioParameter::add(const String8& key, const String8& value)
891 {
892 if (mParameters.indexOfKey(key) < 0) {
893 mParameters.add(key, value);
894 return NO_ERROR;
895 } else {
896 mParameters.replaceValueFor(key, value);
897 return ALREADY_EXISTS;
898 }
899 }
900
addInt(const String8 & key,const int value)901 status_t AudioParameter::addInt(const String8& key, const int value)
902 {
903 char str[12];
904 if (snprintf(str, 12, "%d", value) > 0) {
905 String8 str8 = String8(str);
906 return add(key, str8);
907 } else {
908 return BAD_VALUE;
909 }
910 }
911
addFloat(const String8 & key,const float value)912 status_t AudioParameter::addFloat(const String8& key, const float value)
913 {
914 char str[23];
915 if (snprintf(str, 23, "%.10f", value) > 0) {
916 String8 str8 = String8(str);
917 return add(key, str8);
918 } else {
919 return BAD_VALUE;
920 }
921 }
922
remove(const String8 & key)923 status_t AudioParameter::remove(const String8& key)
924 {
925 if (mParameters.indexOfKey(key) >= 0) {
926 mParameters.removeItem(key);
927 return NO_ERROR;
928 } else {
929 return BAD_VALUE;
930 }
931 }
932
get(const String8 & key,String8 & value)933 status_t AudioParameter::get(const String8& key, String8& value)
934 {
935 if (mParameters.indexOfKey(key) >= 0) {
936 value = mParameters.valueFor(key);
937 return NO_ERROR;
938 } else {
939 return BAD_VALUE;
940 }
941 }
942
getInt(const String8 & key,int & value)943 status_t AudioParameter::getInt(const String8& key, int& value)
944 {
945 String8 str8;
946 status_t result = get(key, str8);
947 value = 0;
948 if (result == NO_ERROR) {
949 int val;
950 if (sscanf(str8.string(), "%d", &val) == 1) {
951 value = val;
952 } else {
953 result = INVALID_OPERATION;
954 }
955 }
956 return result;
957 }
958
getFloat(const String8 & key,float & value)959 status_t AudioParameter::getFloat(const String8& key, float& value)
960 {
961 String8 str8;
962 status_t result = get(key, str8);
963 value = 0;
964 if (result == NO_ERROR) {
965 float val;
966 if (sscanf(str8.string(), "%f", &val) == 1) {
967 value = val;
968 } else {
969 result = INVALID_OPERATION;
970 }
971 }
972 return result;
973 }
974
getAt(size_t index,String8 & key,String8 & value)975 status_t AudioParameter::getAt(size_t index, String8& key, String8& value)
976 {
977 if (mParameters.size() > index) {
978 key = mParameters.keyAt(index);
979 value = mParameters.valueAt(index);
980 return NO_ERROR;
981 } else {
982 return BAD_VALUE;
983 }
984 }
985 }; // namespace android
986
987