AudioSystem.cpp revision b72a396826da8bd934b9531bbd40f86d7509e71c
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} 344 345// --------------------------------------------------------------------------- 346 347void AudioSystem::AudioFlingerClient::binderDied(const wp<IBinder>& who) { 348 Mutex::Autolock _l(AudioSystem::gLock); 349 350 AudioSystem::gAudioFlinger.clear(); 351 // clear output handles and stream to output map caches 352 AudioSystem::gStreamOutputMap.clear(); 353 AudioSystem::gOutputs.clear(); 354 355 if (gAudioErrorCallback) { 356 gAudioErrorCallback(DEAD_OBJECT); 357 } 358 LOGW("AudioFlinger server died!"); 359} 360 361void AudioSystem::AudioFlingerClient::ioConfigChanged(int event, int ioHandle, void *param2) { 362 LOGV("ioConfigChanged() event %d", event); 363 OutputDescriptor *desc; 364 uint32_t stream; 365 366 if (ioHandle == 0) return; 367 368 Mutex::Autolock _l(AudioSystem::gLock); 369 370 switch (event) { 371 case STREAM_CONFIG_CHANGED: 372 if (param2 == 0) break; 373 stream = *(uint32_t *)param2; 374 LOGV("ioConfigChanged() STREAM_CONFIG_CHANGED stream %d, output %d", stream, ioHandle); 375 if (gStreamOutputMap.indexOfKey(stream) >= 0) { 376 gStreamOutputMap.replaceValueFor(stream, ioHandle); 377 } 378 break; 379 case OUTPUT_OPENED: { 380 if (gOutputs.indexOfKey(ioHandle) >= 0) { 381 LOGV("ioConfigChanged() opening already existing output! %d", ioHandle); 382 break; 383 } 384 if (param2 == 0) break; 385 desc = (OutputDescriptor *)param2; 386 387 OutputDescriptor *outputDesc = new OutputDescriptor(*desc); 388 gOutputs.add(ioHandle, outputDesc); 389 LOGV("ioConfigChanged() new output samplingRate %d, format %d channels %d frameCount %d latency %d", 390 outputDesc->samplingRate, outputDesc->format, outputDesc->channels, outputDesc->frameCount, outputDesc->latency); 391 } break; 392 case OUTPUT_CLOSED: { 393 if (gOutputs.indexOfKey(ioHandle) < 0) { 394 LOGW("ioConfigChanged() closing unknow output! %d", ioHandle); 395 break; 396 } 397 LOGV("ioConfigChanged() output %d closed", ioHandle); 398 399 gOutputs.removeItem(ioHandle); 400 for (int i = gStreamOutputMap.size() - 1; i >= 0 ; i--) { 401 if (gStreamOutputMap.valueAt(i) == ioHandle) { 402 gStreamOutputMap.removeItemsAt(i); 403 } 404 } 405 } break; 406 407 case OUTPUT_CONFIG_CHANGED: { 408 int index = gOutputs.indexOfKey(ioHandle); 409 if (index < 0) { 410 LOGW("ioConfigChanged() modifying unknow output! %d", ioHandle); 411 break; 412 } 413 if (param2 == 0) break; 414 desc = (OutputDescriptor *)param2; 415 416 LOGV("ioConfigChanged() new config for output %d samplingRate %d, format %d channels %d frameCount %d latency %d", 417 ioHandle, desc->samplingRate, desc->format, 418 desc->channels, desc->frameCount, desc->latency); 419 OutputDescriptor *outputDesc = gOutputs.valueAt(index); 420 delete outputDesc; 421 outputDesc = new OutputDescriptor(*desc); 422 gOutputs.replaceValueFor(ioHandle, outputDesc); 423 } break; 424 case INPUT_OPENED: 425 case INPUT_CLOSED: 426 case INPUT_CONFIG_CHANGED: 427 break; 428 429 } 430} 431 432void AudioSystem::setErrorCallback(audio_error_callback cb) { 433 Mutex::Autolock _l(gLock); 434 gAudioErrorCallback = cb; 435} 436 437bool AudioSystem::routedToA2dpOutput(int streamType) { 438 switch(streamType) { 439 case MUSIC: 440 case VOICE_CALL: 441 case BLUETOOTH_SCO: 442 case SYSTEM: 443 return true; 444 default: 445 return false; 446 } 447} 448 449 450// client singleton for AudioPolicyService binder interface 451sp<IAudioPolicyService> AudioSystem::gAudioPolicyService; 452sp<AudioSystem::AudioPolicyServiceClient> AudioSystem::gAudioPolicyServiceClient; 453 454 455// establish binder interface to AudioFlinger service 456const sp<IAudioPolicyService>& AudioSystem::get_audio_policy_service() 457{ 458 gLock.lock(); 459 if (gAudioPolicyService.get() == 0) { 460 sp<IServiceManager> sm = defaultServiceManager(); 461 sp<IBinder> binder; 462 do { 463 binder = sm->getService(String16("media.audio_policy")); 464 if (binder != 0) 465 break; 466 LOGW("AudioPolicyService not published, waiting..."); 467 usleep(500000); // 0.5 s 468 } while(true); 469 if (gAudioPolicyServiceClient == NULL) { 470 gAudioPolicyServiceClient = new AudioPolicyServiceClient(); 471 } 472 binder->linkToDeath(gAudioPolicyServiceClient); 473 gAudioPolicyService = interface_cast<IAudioPolicyService>(binder); 474 gLock.unlock(); 475 } else { 476 gLock.unlock(); 477 } 478 return gAudioPolicyService; 479} 480 481status_t AudioSystem::setDeviceConnectionState(audio_devices device, 482 device_connection_state state, 483 const char *device_address) 484{ 485 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service(); 486 if (aps == 0) return PERMISSION_DENIED; 487 488 return aps->setDeviceConnectionState(device, state, device_address); 489} 490 491AudioSystem::device_connection_state AudioSystem::getDeviceConnectionState(audio_devices device, 492 const char *device_address) 493{ 494 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service(); 495 if (aps == 0) return DEVICE_STATE_UNAVAILABLE; 496 497 return aps->getDeviceConnectionState(device, device_address); 498} 499 500status_t AudioSystem::setPhoneState(int state) 501{ 502 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service(); 503 if (aps == 0) return PERMISSION_DENIED; 504 505 return aps->setPhoneState(state); 506} 507 508status_t AudioSystem::setRingerMode(uint32_t mode, uint32_t mask) 509{ 510 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service(); 511 if (aps == 0) return PERMISSION_DENIED; 512 return aps->setRingerMode(mode, mask); 513} 514 515status_t AudioSystem::setForceUse(force_use usage, forced_config config) 516{ 517 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service(); 518 if (aps == 0) return PERMISSION_DENIED; 519 return aps->setForceUse(usage, config); 520} 521 522AudioSystem::forced_config AudioSystem::getForceUse(force_use usage) 523{ 524 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service(); 525 if (aps == 0) return FORCE_NONE; 526 return aps->getForceUse(usage); 527} 528 529 530audio_io_handle_t AudioSystem::getOutput(stream_type stream, 531 uint32_t samplingRate, 532 uint32_t format, 533 uint32_t channels, 534 output_flags flags) 535{ 536 audio_io_handle_t output = 0; 537 if ((flags & AudioSystem::OUTPUT_FLAG_DIRECT) == 0) { 538 Mutex::Autolock _l(gLock); 539 output = AudioSystem::gStreamOutputMap.valueFor(stream); 540 LOGV_IF((output != 0), "getOutput() read %d from cache for stream %d", output, stream); 541 } 542 if (output == 0) { 543 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service(); 544 if (aps == 0) return 0; 545 output = aps->getOutput(stream, samplingRate, format, channels, flags); 546 if ((flags & AudioSystem::OUTPUT_FLAG_DIRECT) == 0) { 547 Mutex::Autolock _l(gLock); 548 AudioSystem::gStreamOutputMap.add(stream, output); 549 } 550 } 551 return output; 552} 553 554status_t AudioSystem::startOutput(audio_io_handle_t output, AudioSystem::stream_type stream) 555{ 556 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service(); 557 if (aps == 0) return PERMISSION_DENIED; 558 return aps->startOutput(output, stream); 559} 560 561status_t AudioSystem::stopOutput(audio_io_handle_t output, AudioSystem::stream_type stream) 562{ 563 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service(); 564 if (aps == 0) return PERMISSION_DENIED; 565 return aps->stopOutput(output, stream); 566} 567 568void AudioSystem::releaseOutput(audio_io_handle_t output) 569{ 570 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service(); 571 if (aps == 0) return; 572 aps->releaseOutput(output); 573} 574 575audio_io_handle_t AudioSystem::getInput(int inputSource, 576 uint32_t samplingRate, 577 uint32_t format, 578 uint32_t channels, 579 audio_in_acoustics acoustics) 580{ 581 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service(); 582 if (aps == 0) return 0; 583 return aps->getInput(inputSource, samplingRate, format, channels, acoustics); 584} 585 586status_t AudioSystem::startInput(audio_io_handle_t input) 587{ 588 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service(); 589 if (aps == 0) return PERMISSION_DENIED; 590 return aps->startInput(input); 591} 592 593status_t AudioSystem::stopInput(audio_io_handle_t input) 594{ 595 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service(); 596 if (aps == 0) return PERMISSION_DENIED; 597 return aps->stopInput(input); 598} 599 600void AudioSystem::releaseInput(audio_io_handle_t input) 601{ 602 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service(); 603 if (aps == 0) return; 604 aps->releaseInput(input); 605} 606 607status_t AudioSystem::initStreamVolume(stream_type stream, 608 int indexMin, 609 int indexMax) 610{ 611 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service(); 612 if (aps == 0) return PERMISSION_DENIED; 613 return aps->initStreamVolume(stream, indexMin, indexMax); 614} 615 616status_t AudioSystem::setStreamVolumeIndex(stream_type stream, int index) 617{ 618 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service(); 619 if (aps == 0) return PERMISSION_DENIED; 620 return aps->setStreamVolumeIndex(stream, index); 621} 622 623status_t AudioSystem::getStreamVolumeIndex(stream_type stream, int *index) 624{ 625 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service(); 626 if (aps == 0) return PERMISSION_DENIED; 627 return aps->getStreamVolumeIndex(stream, index); 628} 629 630// --------------------------------------------------------------------------- 631 632void AudioSystem::AudioPolicyServiceClient::binderDied(const wp<IBinder>& who) { 633 Mutex::Autolock _l(AudioSystem::gLock); 634 AudioSystem::gAudioPolicyService.clear(); 635 636 LOGW("AudioPolicyService server died!"); 637} 638 639// --------------------------------------------------------------------------- 640 641 642// use emulated popcount optimization 643// http://www.df.lth.se/~john_e/gems/gem002d.html 644uint32_t AudioSystem::popCount(uint32_t u) 645{ 646 u = ((u&0x55555555) + ((u>>1)&0x55555555)); 647 u = ((u&0x33333333) + ((u>>2)&0x33333333)); 648 u = ((u&0x0f0f0f0f) + ((u>>4)&0x0f0f0f0f)); 649 u = ((u&0x00ff00ff) + ((u>>8)&0x00ff00ff)); 650 u = ( u&0x0000ffff) + (u>>16); 651 return u; 652} 653 654bool AudioSystem::isOutputDevice(audio_devices device) 655{ 656 if ((popCount(device) == 1 ) && 657 ((device & ~AudioSystem::DEVICE_OUT_ALL) == 0)) { 658 return true; 659 } else { 660 return false; 661 } 662} 663 664bool AudioSystem::isInputDevice(audio_devices device) 665{ 666 if ((popCount(device) == 1 ) && 667 ((device & ~AudioSystem::DEVICE_IN_ALL) == 0)) { 668 return true; 669 } else { 670 return false; 671 } 672} 673 674bool AudioSystem::isA2dpDevice(audio_devices device) 675{ 676 if ((popCount(device) == 1 ) && 677 (device & (AudioSystem::DEVICE_OUT_BLUETOOTH_A2DP | 678 AudioSystem::DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES | 679 AudioSystem::DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER))) { 680 return true; 681 } else { 682 return false; 683 } 684} 685 686bool AudioSystem::isBluetoothScoDevice(audio_devices device) 687{ 688 if ((popCount(device) == 1 ) && 689 (device & (AudioSystem::DEVICE_OUT_BLUETOOTH_SCO | 690 AudioSystem::DEVICE_OUT_BLUETOOTH_SCO_HEADSET | 691 AudioSystem::DEVICE_OUT_BLUETOOTH_SCO_CARKIT))) { 692 return true; 693 } else { 694 return false; 695 } 696} 697 698bool AudioSystem::isLowVisibility(stream_type stream) 699{ 700 if (stream == AudioSystem::SYSTEM || stream == AudioSystem::NOTIFICATION) { 701 return true; 702 } else { 703 return false; 704 } 705} 706 707bool AudioSystem::isInputChannel(uint32_t channel) 708{ 709 if ((channel & ~AudioSystem::CHANNEL_IN_ALL) == 0) { 710 return true; 711 } else { 712 return false; 713 } 714} 715 716bool AudioSystem::isOutputChannel(uint32_t channel) 717{ 718 if ((channel & ~AudioSystem::CHANNEL_OUT_ALL) == 0) { 719 return true; 720 } else { 721 return false; 722 } 723} 724 725bool AudioSystem::isValidFormat(uint32_t format) 726{ 727 switch (format & MAIN_FORMAT_MASK) { 728 case PCM: 729 case MP3: 730 case AMR_NB: 731 case AMR_WB: 732 case AAC: 733 case HE_AAC_V1: 734 case HE_AAC_V2: 735 case VORBIS: 736 return true; 737 default: 738 return false; 739 } 740} 741 742bool AudioSystem::isLinearPCM(uint32_t format) 743{ 744 switch (format) { 745 case PCM_16_BIT: 746 case PCM_8_BIT: 747 return true; 748 default: 749 return false; 750 } 751} 752 753//------------------------- AudioParameter class implementation --------------- 754 755const char *AudioParameter::keyRouting = "routing"; 756const char *AudioParameter::keySamplingRate = "sampling_rate"; 757const char *AudioParameter::keyFormat = "format"; 758const char *AudioParameter::keyChannels = "channels"; 759const char *AudioParameter::keyFrameCount = "frame_count"; 760 761AudioParameter::AudioParameter(const String8& keyValuePairs) 762{ 763 char *str = new char[keyValuePairs.length()+1]; 764 mKeyValuePairs = keyValuePairs; 765 766 strcpy(str, keyValuePairs.string()); 767 char *pair = strtok(str, ";"); 768 while (pair != NULL) { 769 if (strlen(pair) != 0) { 770 size_t eqIdx = strcspn(pair, "="); 771 String8 key = String8(pair, eqIdx); 772 String8 value; 773 if (eqIdx == strlen(pair)) { 774 value = String8(""); 775 } else { 776 value = String8(pair + eqIdx + 1); 777 } 778 if (mParameters.indexOfKey(key) < 0) { 779 mParameters.add(key, value); 780 } else { 781 mParameters.replaceValueFor(key, value); 782 } 783 } else { 784 LOGV("AudioParameter() cstor empty key value pair"); 785 } 786 pair = strtok(NULL, ";"); 787 } 788 789 delete[] str; 790} 791 792AudioParameter::~AudioParameter() 793{ 794 mParameters.clear(); 795} 796 797String8 AudioParameter::toString() 798{ 799 String8 str = String8(""); 800 801 size_t size = mParameters.size(); 802 for (size_t i = 0; i < size; i++) { 803 str += mParameters.keyAt(i); 804 str += "="; 805 str += mParameters.valueAt(i); 806 if (i < (size - 1)) str += ";"; 807 } 808 return str; 809} 810 811status_t AudioParameter::add(const String8& key, const String8& value) 812{ 813 if (mParameters.indexOfKey(key) < 0) { 814 mParameters.add(key, value); 815 return NO_ERROR; 816 } else { 817 mParameters.replaceValueFor(key, value); 818 return ALREADY_EXISTS; 819 } 820} 821 822status_t AudioParameter::addInt(const String8& key, const int value) 823{ 824 char str[12]; 825 if (snprintf(str, 12, "%d", value) > 0) { 826 String8 str8 = String8(str); 827 return add(key, str8); 828 } else { 829 return BAD_VALUE; 830 } 831} 832 833status_t AudioParameter::addFloat(const String8& key, const float value) 834{ 835 char str[23]; 836 if (snprintf(str, 23, "%.10f", value) > 0) { 837 String8 str8 = String8(str); 838 return add(key, str8); 839 } else { 840 return BAD_VALUE; 841 } 842} 843 844status_t AudioParameter::remove(const String8& key) 845{ 846 if (mParameters.indexOfKey(key) >= 0) { 847 mParameters.removeItem(key); 848 return NO_ERROR; 849 } else { 850 return BAD_VALUE; 851 } 852} 853 854status_t AudioParameter::get(const String8& key, String8& value) 855{ 856 if (mParameters.indexOfKey(key) >= 0) { 857 value = mParameters.valueFor(key); 858 return NO_ERROR; 859 } else { 860 return BAD_VALUE; 861 } 862} 863 864status_t AudioParameter::getInt(const String8& key, int& value) 865{ 866 String8 str8; 867 status_t result = get(key, str8); 868 value = 0; 869 if (result == NO_ERROR) { 870 int val; 871 if (sscanf(str8.string(), "%d", &val) == 1) { 872 value = val; 873 } else { 874 result = INVALID_OPERATION; 875 } 876 } 877 return result; 878} 879 880status_t AudioParameter::getFloat(const String8& key, float& value) 881{ 882 String8 str8; 883 status_t result = get(key, str8); 884 value = 0; 885 if (result == NO_ERROR) { 886 float val; 887 if (sscanf(str8.string(), "%f", &val) == 1) { 888 value = val; 889 } else { 890 result = INVALID_OPERATION; 891 } 892 } 893 return result; 894} 895 896status_t AudioParameter::getAt(size_t index, String8& key, String8& value) 897{ 898 if (mParameters.size() > index) { 899 key = mParameters.keyAt(index); 900 value = mParameters.valueAt(index); 901 return NO_ERROR; 902 } else { 903 return BAD_VALUE; 904 } 905} 906}; // namespace android 907 908