AudioSystem.cpp revision 56ecd20263d7f63476f756fc5d8b043b325c7bfb
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 == 0) return result; 362 363 result = af->getInputFramesLost(ioHandle); 364 return result; 365} 366 367int 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 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 LOGW("AudioFlinger server died!"); 387} 388 389void 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 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 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 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 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 509status_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 519AudioSystem::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 528status_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 536status_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 543status_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 550AudioSystem::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 558audio_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 593status_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 602status_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 611void 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 618audio_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 629status_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 636status_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 643void 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 650status_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 659status_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 666status_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 673uint32_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 680audio_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 687status_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 698status_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 707void 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 719uint32_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 729bool 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 739bool 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 749bool 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 761bool 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 774bool 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 785bool 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 794bool 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 803bool 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 820bool 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 833const char *AudioParameter::keyRouting = "routing"; 834const char *AudioParameter::keySamplingRate = "sampling_rate"; 835const char *AudioParameter::keyFormat = "format"; 836const char *AudioParameter::keyChannels = "channels"; 837const char *AudioParameter::keyFrameCount = "frame_count"; 838const char *AudioParameter::keyInputSource = "input_source"; 839 840AudioParameter::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 871AudioParameter::~AudioParameter() 872{ 873 mParameters.clear(); 874} 875 876String8 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 890status_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 901status_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 912status_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 923status_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 933status_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 943status_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 959status_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 975status_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