AudioSystem.cpp revision 05bca2fde53bfe3063d2a0a877f2b6bfdd6052cf
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 35namespace android { 36 37// client singleton for AudioFlinger binder interface 38Mutex AudioSystem::gLock; 39sp<IAudioFlinger> AudioSystem::gAudioFlinger; 40sp<AudioSystem::AudioFlingerClient> AudioSystem::gAudioFlingerClient; 41audio_error_callback AudioSystem::gAudioErrorCallback = NULL; 42// Cached values 43DefaultKeyedVector<int, audio_io_handle_t> AudioSystem::gStreamOutputMap(0); 44DefaultKeyedVector<audio_io_handle_t, AudioSystem::OutputDescriptor *> AudioSystem::gOutputs(0); 45 46// Cached values for recording queries 47uint32_t AudioSystem::gPrevInSamplingRate = 16000; 48int AudioSystem::gPrevInFormat = AudioSystem::PCM_16_BIT; 49int AudioSystem::gPrevInChannelCount = 1; 50size_t AudioSystem::gInBuffSize = 0; 51 52 53// establish binder interface to AudioFlinger service 54const 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 83status_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 89status_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 96status_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 104status_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 112status_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 120status_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 128status_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 137status_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 146status_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 155status_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 164status_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 173status_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 181status_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 187String8 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 199static const float dBPerStep = 0.5f; 200// shouldn't need to touch these 201static const float dBConvert = -dBPerStep * 2.302585093f / 20.0f; 202static const float dBConvertInverse = 1.0f / dBConvert; 203 204float 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 212int 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 220status_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 253status_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 284status_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 315status_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 338status_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 345status_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 357unsigned 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 == NULL) return result; 362 363 result = af->getInputFramesLost(ioHandle); 364 return result; 365} 366 367// --------------------------------------------------------------------------- 368 369void AudioSystem::AudioFlingerClient::binderDied(const wp<IBinder>& who) { 370 Mutex::Autolock _l(AudioSystem::gLock); 371 372 AudioSystem::gAudioFlinger.clear(); 373 // clear output handles and stream to output map caches 374 AudioSystem::gStreamOutputMap.clear(); 375 AudioSystem::gOutputs.clear(); 376 377 if (gAudioErrorCallback) { 378 gAudioErrorCallback(DEAD_OBJECT); 379 } 380 LOGW("AudioFlinger server died!"); 381} 382 383void AudioSystem::AudioFlingerClient::ioConfigChanged(int event, int ioHandle, void *param2) { 384 LOGV("ioConfigChanged() event %d", event); 385 OutputDescriptor *desc; 386 uint32_t stream; 387 388 if (ioHandle == 0) return; 389 390 Mutex::Autolock _l(AudioSystem::gLock); 391 392 switch (event) { 393 case STREAM_CONFIG_CHANGED: 394 if (param2 == 0) break; 395 stream = *(uint32_t *)param2; 396 LOGV("ioConfigChanged() STREAM_CONFIG_CHANGED stream %d, output %d", stream, ioHandle); 397 if (gStreamOutputMap.indexOfKey(stream) >= 0) { 398 gStreamOutputMap.replaceValueFor(stream, ioHandle); 399 } 400 break; 401 case OUTPUT_OPENED: { 402 if (gOutputs.indexOfKey(ioHandle) >= 0) { 403 LOGV("ioConfigChanged() opening already existing output! %d", ioHandle); 404 break; 405 } 406 if (param2 == 0) break; 407 desc = (OutputDescriptor *)param2; 408 409 OutputDescriptor *outputDesc = new OutputDescriptor(*desc); 410 gOutputs.add(ioHandle, outputDesc); 411 LOGV("ioConfigChanged() new output samplingRate %d, format %d channels %d frameCount %d latency %d", 412 outputDesc->samplingRate, outputDesc->format, outputDesc->channels, outputDesc->frameCount, outputDesc->latency); 413 } break; 414 case OUTPUT_CLOSED: { 415 if (gOutputs.indexOfKey(ioHandle) < 0) { 416 LOGW("ioConfigChanged() closing unknow output! %d", ioHandle); 417 break; 418 } 419 LOGV("ioConfigChanged() output %d closed", ioHandle); 420 421 gOutputs.removeItem(ioHandle); 422 for (int i = gStreamOutputMap.size() - 1; i >= 0 ; i--) { 423 if (gStreamOutputMap.valueAt(i) == ioHandle) { 424 gStreamOutputMap.removeItemsAt(i); 425 } 426 } 427 } break; 428 429 case OUTPUT_CONFIG_CHANGED: { 430 int index = gOutputs.indexOfKey(ioHandle); 431 if (index < 0) { 432 LOGW("ioConfigChanged() modifying unknow output! %d", ioHandle); 433 break; 434 } 435 if (param2 == 0) break; 436 desc = (OutputDescriptor *)param2; 437 438 LOGV("ioConfigChanged() new config for output %d samplingRate %d, format %d channels %d frameCount %d latency %d", 439 ioHandle, desc->samplingRate, desc->format, 440 desc->channels, desc->frameCount, desc->latency); 441 OutputDescriptor *outputDesc = gOutputs.valueAt(index); 442 delete outputDesc; 443 outputDesc = new OutputDescriptor(*desc); 444 gOutputs.replaceValueFor(ioHandle, outputDesc); 445 } break; 446 case INPUT_OPENED: 447 case INPUT_CLOSED: 448 case INPUT_CONFIG_CHANGED: 449 break; 450 451 } 452} 453 454void AudioSystem::setErrorCallback(audio_error_callback cb) { 455 Mutex::Autolock _l(gLock); 456 gAudioErrorCallback = cb; 457} 458 459bool AudioSystem::routedToA2dpOutput(int streamType) { 460 switch(streamType) { 461 case MUSIC: 462 case VOICE_CALL: 463 case BLUETOOTH_SCO: 464 case SYSTEM: 465 return true; 466 default: 467 return false; 468 } 469} 470 471 472// client singleton for AudioPolicyService binder interface 473sp<IAudioPolicyService> AudioSystem::gAudioPolicyService; 474sp<AudioSystem::AudioPolicyServiceClient> AudioSystem::gAudioPolicyServiceClient; 475 476 477// establish binder interface to AudioFlinger service 478const sp<IAudioPolicyService>& AudioSystem::get_audio_policy_service() 479{ 480 gLock.lock(); 481 if (gAudioPolicyService.get() == 0) { 482 sp<IServiceManager> sm = defaultServiceManager(); 483 sp<IBinder> binder; 484 do { 485 binder = sm->getService(String16("media.audio_policy")); 486 if (binder != 0) 487 break; 488 LOGW("AudioPolicyService not published, waiting..."); 489 usleep(500000); // 0.5 s 490 } while(true); 491 if (gAudioPolicyServiceClient == NULL) { 492 gAudioPolicyServiceClient = new AudioPolicyServiceClient(); 493 } 494 binder->linkToDeath(gAudioPolicyServiceClient); 495 gAudioPolicyService = interface_cast<IAudioPolicyService>(binder); 496 gLock.unlock(); 497 } else { 498 gLock.unlock(); 499 } 500 return gAudioPolicyService; 501} 502 503status_t AudioSystem::setDeviceConnectionState(audio_devices device, 504 device_connection_state state, 505 const char *device_address) 506{ 507 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service(); 508 if (aps == 0) return PERMISSION_DENIED; 509 510 return aps->setDeviceConnectionState(device, state, device_address); 511} 512 513AudioSystem::device_connection_state AudioSystem::getDeviceConnectionState(audio_devices device, 514 const char *device_address) 515{ 516 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service(); 517 if (aps == 0) return DEVICE_STATE_UNAVAILABLE; 518 519 return aps->getDeviceConnectionState(device, device_address); 520} 521 522status_t AudioSystem::setPhoneState(int state) 523{ 524 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service(); 525 if (aps == 0) return PERMISSION_DENIED; 526 527 return aps->setPhoneState(state); 528} 529 530status_t AudioSystem::setRingerMode(uint32_t mode, uint32_t mask) 531{ 532 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service(); 533 if (aps == 0) return PERMISSION_DENIED; 534 return aps->setRingerMode(mode, mask); 535} 536 537status_t AudioSystem::setForceUse(force_use usage, forced_config config) 538{ 539 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service(); 540 if (aps == 0) return PERMISSION_DENIED; 541 return aps->setForceUse(usage, config); 542} 543 544AudioSystem::forced_config AudioSystem::getForceUse(force_use usage) 545{ 546 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service(); 547 if (aps == 0) return FORCE_NONE; 548 return aps->getForceUse(usage); 549} 550 551 552audio_io_handle_t AudioSystem::getOutput(stream_type stream, 553 uint32_t samplingRate, 554 uint32_t format, 555 uint32_t channels, 556 output_flags flags) 557{ 558 audio_io_handle_t output = 0; 559 if ((flags & AudioSystem::OUTPUT_FLAG_DIRECT) == 0) { 560 Mutex::Autolock _l(gLock); 561 output = AudioSystem::gStreamOutputMap.valueFor(stream); 562 LOGV_IF((output != 0), "getOutput() read %d from cache for stream %d", output, stream); 563 } 564 if (output == 0) { 565 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service(); 566 if (aps == 0) return 0; 567 output = aps->getOutput(stream, samplingRate, format, channels, flags); 568 if ((flags & AudioSystem::OUTPUT_FLAG_DIRECT) == 0) { 569 Mutex::Autolock _l(gLock); 570 AudioSystem::gStreamOutputMap.add(stream, output); 571 } 572 } 573 return output; 574} 575 576status_t AudioSystem::startOutput(audio_io_handle_t output, AudioSystem::stream_type stream) 577{ 578 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service(); 579 if (aps == 0) return PERMISSION_DENIED; 580 return aps->startOutput(output, stream); 581} 582 583status_t AudioSystem::stopOutput(audio_io_handle_t output, AudioSystem::stream_type stream) 584{ 585 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service(); 586 if (aps == 0) return PERMISSION_DENIED; 587 return aps->stopOutput(output, stream); 588} 589 590void AudioSystem::releaseOutput(audio_io_handle_t output) 591{ 592 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service(); 593 if (aps == 0) return; 594 aps->releaseOutput(output); 595} 596 597audio_io_handle_t AudioSystem::getInput(int inputSource, 598 uint32_t samplingRate, 599 uint32_t format, 600 uint32_t channels, 601 audio_in_acoustics acoustics) 602{ 603 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service(); 604 if (aps == 0) return 0; 605 return aps->getInput(inputSource, samplingRate, format, channels, acoustics); 606} 607 608status_t AudioSystem::startInput(audio_io_handle_t input) 609{ 610 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service(); 611 if (aps == 0) return PERMISSION_DENIED; 612 return aps->startInput(input); 613} 614 615status_t AudioSystem::stopInput(audio_io_handle_t input) 616{ 617 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service(); 618 if (aps == 0) return PERMISSION_DENIED; 619 return aps->stopInput(input); 620} 621 622void AudioSystem::releaseInput(audio_io_handle_t input) 623{ 624 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service(); 625 if (aps == 0) return; 626 aps->releaseInput(input); 627} 628 629status_t AudioSystem::initStreamVolume(stream_type stream, 630 int indexMin, 631 int indexMax) 632{ 633 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service(); 634 if (aps == 0) return PERMISSION_DENIED; 635 return aps->initStreamVolume(stream, indexMin, indexMax); 636} 637 638status_t AudioSystem::setStreamVolumeIndex(stream_type stream, int index) 639{ 640 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service(); 641 if (aps == 0) return PERMISSION_DENIED; 642 return aps->setStreamVolumeIndex(stream, index); 643} 644 645status_t AudioSystem::getStreamVolumeIndex(stream_type stream, int *index) 646{ 647 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service(); 648 if (aps == 0) return PERMISSION_DENIED; 649 return aps->getStreamVolumeIndex(stream, index); 650} 651 652// --------------------------------------------------------------------------- 653 654void AudioSystem::AudioPolicyServiceClient::binderDied(const wp<IBinder>& who) { 655 Mutex::Autolock _l(AudioSystem::gLock); 656 AudioSystem::gAudioPolicyService.clear(); 657 658 LOGW("AudioPolicyService server died!"); 659} 660 661// --------------------------------------------------------------------------- 662 663 664// use emulated popcount optimization 665// http://www.df.lth.se/~john_e/gems/gem002d.html 666uint32_t AudioSystem::popCount(uint32_t u) 667{ 668 u = ((u&0x55555555) + ((u>>1)&0x55555555)); 669 u = ((u&0x33333333) + ((u>>2)&0x33333333)); 670 u = ((u&0x0f0f0f0f) + ((u>>4)&0x0f0f0f0f)); 671 u = ((u&0x00ff00ff) + ((u>>8)&0x00ff00ff)); 672 u = ( u&0x0000ffff) + (u>>16); 673 return u; 674} 675 676bool AudioSystem::isOutputDevice(audio_devices device) 677{ 678 if ((popCount(device) == 1 ) && 679 ((device & ~AudioSystem::DEVICE_OUT_ALL) == 0)) { 680 return true; 681 } else { 682 return false; 683 } 684} 685 686bool AudioSystem::isInputDevice(audio_devices device) 687{ 688 if ((popCount(device) == 1 ) && 689 ((device & ~AudioSystem::DEVICE_IN_ALL) == 0)) { 690 return true; 691 } else { 692 return false; 693 } 694} 695 696bool AudioSystem::isA2dpDevice(audio_devices device) 697{ 698 if ((popCount(device) == 1 ) && 699 (device & (AudioSystem::DEVICE_OUT_BLUETOOTH_A2DP | 700 AudioSystem::DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES | 701 AudioSystem::DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER))) { 702 return true; 703 } else { 704 return false; 705 } 706} 707 708bool AudioSystem::isBluetoothScoDevice(audio_devices device) 709{ 710 if ((popCount(device) == 1 ) && 711 (device & (AudioSystem::DEVICE_OUT_BLUETOOTH_SCO | 712 AudioSystem::DEVICE_OUT_BLUETOOTH_SCO_HEADSET | 713 AudioSystem::DEVICE_OUT_BLUETOOTH_SCO_CARKIT))) { 714 return true; 715 } else { 716 return false; 717 } 718} 719 720bool AudioSystem::isLowVisibility(stream_type stream) 721{ 722 if (stream == AudioSystem::SYSTEM || 723 stream == AudioSystem::NOTIFICATION || 724 stream == AudioSystem::RING) { 725 return true; 726 } else { 727 return false; 728 } 729} 730 731bool AudioSystem::isInputChannel(uint32_t channel) 732{ 733 if ((channel & ~AudioSystem::CHANNEL_IN_ALL) == 0) { 734 return true; 735 } else { 736 return false; 737 } 738} 739 740bool AudioSystem::isOutputChannel(uint32_t channel) 741{ 742 if ((channel & ~AudioSystem::CHANNEL_OUT_ALL) == 0) { 743 return true; 744 } else { 745 return false; 746 } 747} 748 749bool AudioSystem::isValidFormat(uint32_t format) 750{ 751 switch (format & MAIN_FORMAT_MASK) { 752 case PCM: 753 case MP3: 754 case AMR_NB: 755 case AMR_WB: 756 case AAC: 757 case HE_AAC_V1: 758 case HE_AAC_V2: 759 case VORBIS: 760 return true; 761 default: 762 return false; 763 } 764} 765 766bool AudioSystem::isLinearPCM(uint32_t format) 767{ 768 switch (format) { 769 case PCM_16_BIT: 770 case PCM_8_BIT: 771 return true; 772 default: 773 return false; 774 } 775} 776 777//------------------------- AudioParameter class implementation --------------- 778 779const char *AudioParameter::keyRouting = "routing"; 780const char *AudioParameter::keySamplingRate = "sampling_rate"; 781const char *AudioParameter::keyFormat = "format"; 782const char *AudioParameter::keyChannels = "channels"; 783const char *AudioParameter::keyFrameCount = "frame_count"; 784 785AudioParameter::AudioParameter(const String8& keyValuePairs) 786{ 787 char *str = new char[keyValuePairs.length()+1]; 788 mKeyValuePairs = keyValuePairs; 789 790 strcpy(str, keyValuePairs.string()); 791 char *pair = strtok(str, ";"); 792 while (pair != NULL) { 793 if (strlen(pair) != 0) { 794 size_t eqIdx = strcspn(pair, "="); 795 String8 key = String8(pair, eqIdx); 796 String8 value; 797 if (eqIdx == strlen(pair)) { 798 value = String8(""); 799 } else { 800 value = String8(pair + eqIdx + 1); 801 } 802 if (mParameters.indexOfKey(key) < 0) { 803 mParameters.add(key, value); 804 } else { 805 mParameters.replaceValueFor(key, value); 806 } 807 } else { 808 LOGV("AudioParameter() cstor empty key value pair"); 809 } 810 pair = strtok(NULL, ";"); 811 } 812 813 delete[] str; 814} 815 816AudioParameter::~AudioParameter() 817{ 818 mParameters.clear(); 819} 820 821String8 AudioParameter::toString() 822{ 823 String8 str = String8(""); 824 825 size_t size = mParameters.size(); 826 for (size_t i = 0; i < size; i++) { 827 str += mParameters.keyAt(i); 828 str += "="; 829 str += mParameters.valueAt(i); 830 if (i < (size - 1)) str += ";"; 831 } 832 return str; 833} 834 835status_t AudioParameter::add(const String8& key, const String8& value) 836{ 837 if (mParameters.indexOfKey(key) < 0) { 838 mParameters.add(key, value); 839 return NO_ERROR; 840 } else { 841 mParameters.replaceValueFor(key, value); 842 return ALREADY_EXISTS; 843 } 844} 845 846status_t AudioParameter::addInt(const String8& key, const int value) 847{ 848 char str[12]; 849 if (snprintf(str, 12, "%d", value) > 0) { 850 String8 str8 = String8(str); 851 return add(key, str8); 852 } else { 853 return BAD_VALUE; 854 } 855} 856 857status_t AudioParameter::addFloat(const String8& key, const float value) 858{ 859 char str[23]; 860 if (snprintf(str, 23, "%.10f", value) > 0) { 861 String8 str8 = String8(str); 862 return add(key, str8); 863 } else { 864 return BAD_VALUE; 865 } 866} 867 868status_t AudioParameter::remove(const String8& key) 869{ 870 if (mParameters.indexOfKey(key) >= 0) { 871 mParameters.removeItem(key); 872 return NO_ERROR; 873 } else { 874 return BAD_VALUE; 875 } 876} 877 878status_t AudioParameter::get(const String8& key, String8& value) 879{ 880 if (mParameters.indexOfKey(key) >= 0) { 881 value = mParameters.valueFor(key); 882 return NO_ERROR; 883 } else { 884 return BAD_VALUE; 885 } 886} 887 888status_t AudioParameter::getInt(const String8& key, int& value) 889{ 890 String8 str8; 891 status_t result = get(key, str8); 892 value = 0; 893 if (result == NO_ERROR) { 894 int val; 895 if (sscanf(str8.string(), "%d", &val) == 1) { 896 value = val; 897 } else { 898 result = INVALID_OPERATION; 899 } 900 } 901 return result; 902} 903 904status_t AudioParameter::getFloat(const String8& key, float& value) 905{ 906 String8 str8; 907 status_t result = get(key, str8); 908 value = 0; 909 if (result == NO_ERROR) { 910 float val; 911 if (sscanf(str8.string(), "%f", &val) == 1) { 912 value = val; 913 } else { 914 result = INVALID_OPERATION; 915 } 916 } 917 return result; 918} 919 920status_t AudioParameter::getAt(size_t index, String8& key, String8& value) 921{ 922 if (mParameters.size() > index) { 923 key = mParameters.keyAt(index); 924 value = mParameters.valueAt(index); 925 return NO_ERROR; 926 } else { 927 return BAD_VALUE; 928 } 929} 930}; // namespace android 931 932