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 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 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 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 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 } 103 104 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 } 111 112 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 } 119 120 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 } 127 128 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 } 136 137 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 } 145 146 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 } 154 155 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 } 163 164 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 } 171 172 173 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 } 179 180 181 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 } 186 187 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; 203 204 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 } 211 212 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 } 219 220 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 } 252 253 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 } 283 284 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 } 314 315 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 } 337 338 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 } 344 345 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 } 356 357 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 } 366 367 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 // --------------------------------------------------------------------------- 374 375 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 } 388 389 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 } 459 460 void AudioSystem::setErrorCallback(audio_error_callback cb) { 461 Mutex::Autolock _l(gLock); 462 gAudioErrorCallback = cb; 463 } 464 465 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 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 } 508 509 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 } 518 519 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 } 527 528 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 } 535 536 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 } 542 543 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 } 549 550 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 } 556 557 558 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 } 592 593 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 } 601 602 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 } 610 611 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 } 617 618 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 } 628 629 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 } 635 636 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 } 642 643 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 } 649 650 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 } 658 659 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 } 665 666 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 } 672 673 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 } 679 680 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 } 686 687 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 } 697 698 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 // --------------------------------------------------------------------------- 706 707 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 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 } 728 729 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 } 738 739 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 } 748 749 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 } 760 761 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 return true; 768 } else { 769 return false; 770 } 771 } 772 773 bool AudioSystem::isLowVisibility(stream_type stream) 774 { 775 if (stream == AudioSystem::SYSTEM || 776 stream == AudioSystem::NOTIFICATION || 777 stream == AudioSystem::RING) { 778 return true; 779 } else { 780 return false; 781 } 782 } 783 784 bool AudioSystem::isInputChannel(uint32_t channel) 785 { 786 if ((channel & ~AudioSystem::CHANNEL_IN_ALL) == 0) { 787 return true; 788 } else { 789 return false; 790 } 791 } 792 793 bool AudioSystem::isOutputChannel(uint32_t channel) 794 { 795 if ((channel & ~AudioSystem::CHANNEL_OUT_ALL) == 0) { 796 return true; 797 } else { 798 return false; 799 } 800 } 801 802 bool AudioSystem::isValidFormat(uint32_t format) 803 { 804 switch (format & MAIN_FORMAT_MASK) { 805 case PCM: 806 case MP3: 807 case AMR_NB: 808 case AMR_WB: 809 case AAC: 810 case HE_AAC_V1: 811 case HE_AAC_V2: 812 case VORBIS: 813 return true; 814 default: 815 return false; 816 } 817 } 818 819 bool AudioSystem::isLinearPCM(uint32_t format) 820 { 821 switch (format) { 822 case PCM_16_BIT: 823 case PCM_8_BIT: 824 return true; 825 default: 826 return false; 827 } 828 } 829 830 //------------------------- AudioParameter class implementation --------------- 831 832 const char *AudioParameter::keyRouting = "routing"; 833 const char *AudioParameter::keySamplingRate = "sampling_rate"; 834 const char *AudioParameter::keyFormat = "format"; 835 const char *AudioParameter::keyChannels = "channels"; 836 const char *AudioParameter::keyFrameCount = "frame_count"; 837 838 AudioParameter::AudioParameter(const String8& keyValuePairs) 839 { 840 char *str = new char[keyValuePairs.length()+1]; 841 mKeyValuePairs = keyValuePairs; 842 843 strcpy(str, keyValuePairs.string()); 844 char *pair = strtok(str, ";"); 845 while (pair != NULL) { 846 if (strlen(pair) != 0) { 847 size_t eqIdx = strcspn(pair, "="); 848 String8 key = String8(pair, eqIdx); 849 String8 value; 850 if (eqIdx == strlen(pair)) { 851 value = String8(""); 852 } else { 853 value = String8(pair + eqIdx + 1); 854 } 855 if (mParameters.indexOfKey(key) < 0) { 856 mParameters.add(key, value); 857 } else { 858 mParameters.replaceValueFor(key, value); 859 } 860 } else { 861 LOGV("AudioParameter() cstor empty key value pair"); 862 } 863 pair = strtok(NULL, ";"); 864 } 865 866 delete[] str; 867 } 868 869 AudioParameter::~AudioParameter() 870 { 871 mParameters.clear(); 872 } 873 874 String8 AudioParameter::toString() 875 { 876 String8 str = String8(""); 877 878 size_t size = mParameters.size(); 879 for (size_t i = 0; i < size; i++) { 880 str += mParameters.keyAt(i); 881 str += "="; 882 str += mParameters.valueAt(i); 883 if (i < (size - 1)) str += ";"; 884 } 885 return str; 886 } 887 888 status_t AudioParameter::add(const String8& key, const String8& value) 889 { 890 if (mParameters.indexOfKey(key) < 0) { 891 mParameters.add(key, value); 892 return NO_ERROR; 893 } else { 894 mParameters.replaceValueFor(key, value); 895 return ALREADY_EXISTS; 896 } 897 } 898 899 status_t AudioParameter::addInt(const String8& key, const int value) 900 { 901 char str[12]; 902 if (snprintf(str, 12, "%d", value) > 0) { 903 String8 str8 = String8(str); 904 return add(key, str8); 905 } else { 906 return BAD_VALUE; 907 } 908 } 909 910 status_t AudioParameter::addFloat(const String8& key, const float value) 911 { 912 char str[23]; 913 if (snprintf(str, 23, "%.10f", value) > 0) { 914 String8 str8 = String8(str); 915 return add(key, str8); 916 } else { 917 return BAD_VALUE; 918 } 919 } 920 921 status_t AudioParameter::remove(const String8& key) 922 { 923 if (mParameters.indexOfKey(key) >= 0) { 924 mParameters.removeItem(key); 925 return NO_ERROR; 926 } else { 927 return BAD_VALUE; 928 } 929 } 930 931 status_t AudioParameter::get(const String8& key, String8& value) 932 { 933 if (mParameters.indexOfKey(key) >= 0) { 934 value = mParameters.valueFor(key); 935 return NO_ERROR; 936 } else { 937 return BAD_VALUE; 938 } 939 } 940 941 status_t AudioParameter::getInt(const String8& key, int& value) 942 { 943 String8 str8; 944 status_t result = get(key, str8); 945 value = 0; 946 if (result == NO_ERROR) { 947 int val; 948 if (sscanf(str8.string(), "%d", &val) == 1) { 949 value = val; 950 } else { 951 result = INVALID_OPERATION; 952 } 953 } 954 return result; 955 } 956 957 status_t AudioParameter::getFloat(const String8& key, float& value) 958 { 959 String8 str8; 960 status_t result = get(key, str8); 961 value = 0; 962 if (result == NO_ERROR) { 963 float val; 964 if (sscanf(str8.string(), "%f", &val) == 1) { 965 value = val; 966 } else { 967 result = INVALID_OPERATION; 968 } 969 } 970 return result; 971 } 972 973 status_t AudioParameter::getAt(size_t index, String8& key, String8& value) 974 { 975 if (mParameters.size() > index) { 976 key = mParameters.keyAt(index); 977 value = mParameters.valueAt(index); 978 return NO_ERROR; 979 } else { 980 return BAD_VALUE; 981 } 982 } 983 }; // namespace android 984 985