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 #include <system/audio.h> 27 28 // ---------------------------------------------------------------------------- 29 30 namespace android { 31 32 // client singleton for AudioFlinger binder interface 33 Mutex AudioSystem::gLock; 34 sp<IAudioFlinger> AudioSystem::gAudioFlinger; 35 sp<AudioSystem::AudioFlingerClient> AudioSystem::gAudioFlingerClient; 36 audio_error_callback AudioSystem::gAudioErrorCallback = NULL; 37 // Cached values 38 39 DefaultKeyedVector<audio_io_handle_t, AudioSystem::OutputDescriptor *> AudioSystem::gOutputs(0); 40 41 // Cached values for recording queries, all protected by gLock 42 uint32_t AudioSystem::gPrevInSamplingRate = 16000; 43 audio_format_t AudioSystem::gPrevInFormat = AUDIO_FORMAT_PCM_16_BIT; 44 int AudioSystem::gPrevInChannelCount = 1; 45 size_t AudioSystem::gInBuffSize = 0; 46 47 48 // establish binder interface to AudioFlinger service 49 const sp<IAudioFlinger>& AudioSystem::get_audio_flinger() 50 { 51 Mutex::Autolock _l(gLock); 52 if (gAudioFlinger == 0) { 53 sp<IServiceManager> sm = defaultServiceManager(); 54 sp<IBinder> binder; 55 do { 56 binder = sm->getService(String16("media.audio_flinger")); 57 if (binder != 0) 58 break; 59 ALOGW("AudioFlinger not published, waiting..."); 60 usleep(500000); // 0.5 s 61 } while (true); 62 if (gAudioFlingerClient == NULL) { 63 gAudioFlingerClient = new AudioFlingerClient(); 64 } else { 65 if (gAudioErrorCallback) { 66 gAudioErrorCallback(NO_ERROR); 67 } 68 } 69 binder->linkToDeath(gAudioFlingerClient); 70 gAudioFlinger = interface_cast<IAudioFlinger>(binder); 71 gAudioFlinger->registerClient(gAudioFlingerClient); 72 } 73 ALOGE_IF(gAudioFlinger==0, "no AudioFlinger!?"); 74 75 return gAudioFlinger; 76 } 77 78 status_t AudioSystem::muteMicrophone(bool state) { 79 const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger(); 80 if (af == 0) return PERMISSION_DENIED; 81 return af->setMicMute(state); 82 } 83 84 status_t AudioSystem::isMicrophoneMuted(bool* state) { 85 const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger(); 86 if (af == 0) return PERMISSION_DENIED; 87 *state = af->getMicMute(); 88 return NO_ERROR; 89 } 90 91 status_t AudioSystem::setMasterVolume(float value) 92 { 93 const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger(); 94 if (af == 0) return PERMISSION_DENIED; 95 af->setMasterVolume(value); 96 return NO_ERROR; 97 } 98 99 status_t AudioSystem::setMasterMute(bool mute) 100 { 101 const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger(); 102 if (af == 0) return PERMISSION_DENIED; 103 af->setMasterMute(mute); 104 return NO_ERROR; 105 } 106 107 status_t AudioSystem::getMasterVolume(float* volume) 108 { 109 const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger(); 110 if (af == 0) return PERMISSION_DENIED; 111 *volume = af->masterVolume(); 112 return NO_ERROR; 113 } 114 115 status_t AudioSystem::getMasterMute(bool* mute) 116 { 117 const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger(); 118 if (af == 0) return PERMISSION_DENIED; 119 *mute = af->masterMute(); 120 return NO_ERROR; 121 } 122 123 status_t AudioSystem::setStreamVolume(audio_stream_type_t stream, float value, 124 audio_io_handle_t output) 125 { 126 if (uint32_t(stream) >= AUDIO_STREAM_CNT) return BAD_VALUE; 127 const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger(); 128 if (af == 0) return PERMISSION_DENIED; 129 af->setStreamVolume(stream, value, output); 130 return NO_ERROR; 131 } 132 133 status_t AudioSystem::setStreamMute(audio_stream_type_t stream, bool mute) 134 { 135 if (uint32_t(stream) >= AUDIO_STREAM_CNT) return BAD_VALUE; 136 const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger(); 137 if (af == 0) return PERMISSION_DENIED; 138 af->setStreamMute(stream, mute); 139 return NO_ERROR; 140 } 141 142 status_t AudioSystem::getStreamVolume(audio_stream_type_t stream, float* volume, 143 audio_io_handle_t output) 144 { 145 if (uint32_t(stream) >= AUDIO_STREAM_CNT) return BAD_VALUE; 146 const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger(); 147 if (af == 0) return PERMISSION_DENIED; 148 *volume = af->streamVolume(stream, output); 149 return NO_ERROR; 150 } 151 152 status_t AudioSystem::getStreamMute(audio_stream_type_t stream, bool* mute) 153 { 154 if (uint32_t(stream) >= AUDIO_STREAM_CNT) return BAD_VALUE; 155 const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger(); 156 if (af == 0) return PERMISSION_DENIED; 157 *mute = af->streamMute(stream); 158 return NO_ERROR; 159 } 160 161 status_t AudioSystem::setMode(audio_mode_t mode) 162 { 163 if (uint32_t(mode) >= AUDIO_MODE_CNT) return BAD_VALUE; 164 const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger(); 165 if (af == 0) return PERMISSION_DENIED; 166 return af->setMode(mode); 167 } 168 169 status_t AudioSystem::setParameters(audio_io_handle_t ioHandle, const String8& keyValuePairs) { 170 const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger(); 171 if (af == 0) return PERMISSION_DENIED; 172 return af->setParameters(ioHandle, keyValuePairs); 173 } 174 175 String8 AudioSystem::getParameters(audio_io_handle_t ioHandle, const String8& keys) { 176 const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger(); 177 String8 result = String8(""); 178 if (af == 0) return result; 179 180 result = af->getParameters(ioHandle, keys); 181 return result; 182 } 183 184 // convert volume steps to natural log scale 185 186 // change this value to change volume scaling 187 static const float dBPerStep = 0.5f; 188 // shouldn't need to touch these 189 static const float dBConvert = -dBPerStep * 2.302585093f / 20.0f; 190 static const float dBConvertInverse = 1.0f / dBConvert; 191 192 float AudioSystem::linearToLog(int volume) 193 { 194 // float v = volume ? exp(float(100 - volume) * dBConvert) : 0; 195 // ALOGD("linearToLog(%d)=%f", volume, v); 196 // return v; 197 return volume ? exp(float(100 - volume) * dBConvert) : 0; 198 } 199 200 int AudioSystem::logToLinear(float volume) 201 { 202 // int v = volume ? 100 - int(dBConvertInverse * log(volume) + 0.5) : 0; 203 // ALOGD("logTolinear(%d)=%f", v, volume); 204 // return v; 205 return volume ? 100 - int(dBConvertInverse * log(volume) + 0.5) : 0; 206 } 207 208 // DEPRECATED 209 status_t AudioSystem::getOutputSamplingRate(int* samplingRate, int streamType) { 210 return getOutputSamplingRate(samplingRate, (audio_stream_type_t)streamType); 211 } 212 213 status_t AudioSystem::getOutputSamplingRate(int* samplingRate, audio_stream_type_t streamType) 214 { 215 audio_io_handle_t output; 216 217 if (streamType == AUDIO_STREAM_DEFAULT) { 218 streamType = AUDIO_STREAM_MUSIC; 219 } 220 221 output = getOutput(streamType); 222 if (output == 0) { 223 return PERMISSION_DENIED; 224 } 225 226 return getSamplingRate(output, streamType, samplingRate); 227 } 228 229 status_t AudioSystem::getSamplingRate(audio_io_handle_t output, 230 audio_stream_type_t streamType, 231 int* samplingRate) 232 { 233 OutputDescriptor *outputDesc; 234 235 gLock.lock(); 236 outputDesc = AudioSystem::gOutputs.valueFor(output); 237 if (outputDesc == NULL) { 238 ALOGV("getOutputSamplingRate() no output descriptor for output %d in gOutputs", output); 239 gLock.unlock(); 240 const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger(); 241 if (af == 0) return PERMISSION_DENIED; 242 *samplingRate = af->sampleRate(output); 243 } else { 244 ALOGV("getOutputSamplingRate() reading from output desc"); 245 *samplingRate = outputDesc->samplingRate; 246 gLock.unlock(); 247 } 248 249 ALOGV("getSamplingRate() streamType %d, output %d, sampling rate %d", streamType, output, *samplingRate); 250 251 return NO_ERROR; 252 } 253 254 // DEPRECATED 255 status_t AudioSystem::getOutputFrameCount(int* frameCount, int streamType) { 256 return getOutputFrameCount(frameCount, (audio_stream_type_t)streamType); 257 } 258 259 status_t AudioSystem::getOutputFrameCount(int* frameCount, audio_stream_type_t streamType) 260 { 261 audio_io_handle_t output; 262 263 if (streamType == AUDIO_STREAM_DEFAULT) { 264 streamType = AUDIO_STREAM_MUSIC; 265 } 266 267 output = getOutput(streamType); 268 if (output == 0) { 269 return PERMISSION_DENIED; 270 } 271 272 return getFrameCount(output, streamType, frameCount); 273 } 274 275 status_t AudioSystem::getFrameCount(audio_io_handle_t output, 276 audio_stream_type_t streamType, 277 int* frameCount) 278 { 279 OutputDescriptor *outputDesc; 280 281 gLock.lock(); 282 outputDesc = AudioSystem::gOutputs.valueFor(output); 283 if (outputDesc == NULL) { 284 gLock.unlock(); 285 const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger(); 286 if (af == 0) return PERMISSION_DENIED; 287 *frameCount = af->frameCount(output); 288 } else { 289 *frameCount = outputDesc->frameCount; 290 gLock.unlock(); 291 } 292 293 ALOGV("getFrameCount() streamType %d, output %d, frameCount %d", streamType, output, *frameCount); 294 295 return NO_ERROR; 296 } 297 298 status_t AudioSystem::getOutputLatency(uint32_t* latency, audio_stream_type_t streamType) 299 { 300 audio_io_handle_t output; 301 302 if (streamType == AUDIO_STREAM_DEFAULT) { 303 streamType = AUDIO_STREAM_MUSIC; 304 } 305 306 output = getOutput(streamType); 307 if (output == 0) { 308 return PERMISSION_DENIED; 309 } 310 311 return getLatency(output, streamType, latency); 312 } 313 314 status_t AudioSystem::getLatency(audio_io_handle_t output, 315 audio_stream_type_t streamType, 316 uint32_t* latency) 317 { 318 OutputDescriptor *outputDesc; 319 320 gLock.lock(); 321 outputDesc = AudioSystem::gOutputs.valueFor(output); 322 if (outputDesc == NULL) { 323 gLock.unlock(); 324 const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger(); 325 if (af == 0) return PERMISSION_DENIED; 326 *latency = af->latency(output); 327 } else { 328 *latency = outputDesc->latency; 329 gLock.unlock(); 330 } 331 332 ALOGV("getLatency() streamType %d, output %d, latency %d", streamType, output, *latency); 333 334 return NO_ERROR; 335 } 336 337 status_t AudioSystem::getInputBufferSize(uint32_t sampleRate, audio_format_t format, int channelCount, 338 size_t* buffSize) 339 { 340 gLock.lock(); 341 // Do we have a stale gInBufferSize or are we requesting the input buffer size for new values 342 size_t inBuffSize = gInBuffSize; 343 if ((inBuffSize == 0) || (sampleRate != gPrevInSamplingRate) || (format != gPrevInFormat) 344 || (channelCount != gPrevInChannelCount)) { 345 gLock.unlock(); 346 const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger(); 347 if (af == 0) { 348 return PERMISSION_DENIED; 349 } 350 inBuffSize = af->getInputBufferSize(sampleRate, format, channelCount); 351 gLock.lock(); 352 // save the request params 353 gPrevInSamplingRate = sampleRate; 354 gPrevInFormat = format; 355 gPrevInChannelCount = channelCount; 356 357 gInBuffSize = inBuffSize; 358 } 359 gLock.unlock(); 360 *buffSize = inBuffSize; 361 362 return NO_ERROR; 363 } 364 365 status_t AudioSystem::setVoiceVolume(float value) 366 { 367 const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger(); 368 if (af == 0) return PERMISSION_DENIED; 369 return af->setVoiceVolume(value); 370 } 371 372 status_t AudioSystem::getRenderPosition(uint32_t *halFrames, uint32_t *dspFrames, audio_stream_type_t stream) 373 { 374 const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger(); 375 if (af == 0) return PERMISSION_DENIED; 376 377 if (stream == AUDIO_STREAM_DEFAULT) { 378 stream = AUDIO_STREAM_MUSIC; 379 } 380 381 return af->getRenderPosition(halFrames, dspFrames, getOutput(stream)); 382 } 383 384 unsigned int AudioSystem::getInputFramesLost(audio_io_handle_t ioHandle) { 385 const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger(); 386 unsigned int result = 0; 387 if (af == 0) return result; 388 if (ioHandle == 0) return result; 389 390 result = af->getInputFramesLost(ioHandle); 391 return result; 392 } 393 394 int AudioSystem::newAudioSessionId() { 395 const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger(); 396 if (af == 0) return 0; 397 return af->newAudioSessionId(); 398 } 399 400 void AudioSystem::acquireAudioSessionId(int audioSession) { 401 const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger(); 402 if (af != 0) { 403 af->acquireAudioSessionId(audioSession); 404 } 405 } 406 407 void AudioSystem::releaseAudioSessionId(int audioSession) { 408 const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger(); 409 if (af != 0) { 410 af->releaseAudioSessionId(audioSession); 411 } 412 } 413 414 // --------------------------------------------------------------------------- 415 416 void AudioSystem::AudioFlingerClient::binderDied(const wp<IBinder>& who) { 417 Mutex::Autolock _l(AudioSystem::gLock); 418 419 AudioSystem::gAudioFlinger.clear(); 420 // clear output handles and stream to output map caches 421 AudioSystem::gOutputs.clear(); 422 423 if (gAudioErrorCallback) { 424 gAudioErrorCallback(DEAD_OBJECT); 425 } 426 ALOGW("AudioFlinger server died!"); 427 } 428 429 void AudioSystem::AudioFlingerClient::ioConfigChanged(int event, audio_io_handle_t ioHandle, 430 const void *param2) { 431 ALOGV("ioConfigChanged() event %d", event); 432 const OutputDescriptor *desc; 433 audio_stream_type_t stream; 434 435 if (ioHandle == 0) return; 436 437 Mutex::Autolock _l(AudioSystem::gLock); 438 439 switch (event) { 440 case STREAM_CONFIG_CHANGED: 441 break; 442 case OUTPUT_OPENED: { 443 if (gOutputs.indexOfKey(ioHandle) >= 0) { 444 ALOGV("ioConfigChanged() opening already existing output! %d", ioHandle); 445 break; 446 } 447 if (param2 == NULL) break; 448 desc = (const OutputDescriptor *)param2; 449 450 OutputDescriptor *outputDesc = new OutputDescriptor(*desc); 451 gOutputs.add(ioHandle, outputDesc); 452 ALOGV("ioConfigChanged() new output samplingRate %d, format %d channels %d frameCount %d latency %d", 453 outputDesc->samplingRate, outputDesc->format, outputDesc->channels, outputDesc->frameCount, outputDesc->latency); 454 } break; 455 case OUTPUT_CLOSED: { 456 if (gOutputs.indexOfKey(ioHandle) < 0) { 457 ALOGW("ioConfigChanged() closing unknow output! %d", ioHandle); 458 break; 459 } 460 ALOGV("ioConfigChanged() output %d closed", ioHandle); 461 462 gOutputs.removeItem(ioHandle); 463 } break; 464 465 case OUTPUT_CONFIG_CHANGED: { 466 int index = gOutputs.indexOfKey(ioHandle); 467 if (index < 0) { 468 ALOGW("ioConfigChanged() modifying unknow output! %d", ioHandle); 469 break; 470 } 471 if (param2 == NULL) break; 472 desc = (const OutputDescriptor *)param2; 473 474 ALOGV("ioConfigChanged() new config for output %d samplingRate %d, format %d channels %d frameCount %d latency %d", 475 ioHandle, desc->samplingRate, desc->format, 476 desc->channels, desc->frameCount, desc->latency); 477 OutputDescriptor *outputDesc = gOutputs.valueAt(index); 478 delete outputDesc; 479 outputDesc = new OutputDescriptor(*desc); 480 gOutputs.replaceValueFor(ioHandle, outputDesc); 481 } break; 482 case INPUT_OPENED: 483 case INPUT_CLOSED: 484 case INPUT_CONFIG_CHANGED: 485 break; 486 487 } 488 } 489 490 void AudioSystem::setErrorCallback(audio_error_callback cb) { 491 Mutex::Autolock _l(gLock); 492 gAudioErrorCallback = cb; 493 } 494 495 bool AudioSystem::routedToA2dpOutput(audio_stream_type_t streamType) { 496 switch (streamType) { 497 case AUDIO_STREAM_MUSIC: 498 case AUDIO_STREAM_VOICE_CALL: 499 case AUDIO_STREAM_BLUETOOTH_SCO: 500 case AUDIO_STREAM_SYSTEM: 501 return true; 502 default: 503 return false; 504 } 505 } 506 507 508 // client singleton for AudioPolicyService binder interface 509 sp<IAudioPolicyService> AudioSystem::gAudioPolicyService; 510 sp<AudioSystem::AudioPolicyServiceClient> AudioSystem::gAudioPolicyServiceClient; 511 512 513 // establish binder interface to AudioFlinger service 514 const sp<IAudioPolicyService>& AudioSystem::get_audio_policy_service() 515 { 516 gLock.lock(); 517 if (gAudioPolicyService == 0) { 518 sp<IServiceManager> sm = defaultServiceManager(); 519 sp<IBinder> binder; 520 do { 521 binder = sm->getService(String16("media.audio_policy")); 522 if (binder != 0) 523 break; 524 ALOGW("AudioPolicyService not published, waiting..."); 525 usleep(500000); // 0.5 s 526 } while (true); 527 if (gAudioPolicyServiceClient == NULL) { 528 gAudioPolicyServiceClient = new AudioPolicyServiceClient(); 529 } 530 binder->linkToDeath(gAudioPolicyServiceClient); 531 gAudioPolicyService = interface_cast<IAudioPolicyService>(binder); 532 gLock.unlock(); 533 } else { 534 gLock.unlock(); 535 } 536 return gAudioPolicyService; 537 } 538 539 status_t AudioSystem::setDeviceConnectionState(audio_devices_t device, 540 audio_policy_dev_state_t state, 541 const char *device_address) 542 { 543 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service(); 544 const char *address = ""; 545 546 if (aps == 0) return PERMISSION_DENIED; 547 548 if (device_address != NULL) { 549 address = device_address; 550 } 551 552 return aps->setDeviceConnectionState(device, state, address); 553 } 554 555 audio_policy_dev_state_t AudioSystem::getDeviceConnectionState(audio_devices_t device, 556 const char *device_address) 557 { 558 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service(); 559 if (aps == 0) return AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE; 560 561 return aps->getDeviceConnectionState(device, device_address); 562 } 563 564 status_t AudioSystem::setPhoneState(audio_mode_t state) 565 { 566 if (uint32_t(state) >= AUDIO_MODE_CNT) return BAD_VALUE; 567 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service(); 568 if (aps == 0) return PERMISSION_DENIED; 569 570 return aps->setPhoneState(state); 571 } 572 573 status_t AudioSystem::setForceUse(audio_policy_force_use_t usage, audio_policy_forced_cfg_t config) 574 { 575 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service(); 576 if (aps == 0) return PERMISSION_DENIED; 577 return aps->setForceUse(usage, config); 578 } 579 580 audio_policy_forced_cfg_t AudioSystem::getForceUse(audio_policy_force_use_t usage) 581 { 582 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service(); 583 if (aps == 0) return AUDIO_POLICY_FORCE_NONE; 584 return aps->getForceUse(usage); 585 } 586 587 588 audio_io_handle_t AudioSystem::getOutput(audio_stream_type_t stream, 589 uint32_t samplingRate, 590 audio_format_t format, 591 uint32_t channels, 592 audio_output_flags_t flags) 593 { 594 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service(); 595 if (aps == 0) return 0; 596 return aps->getOutput(stream, samplingRate, format, channels, flags); 597 } 598 599 status_t AudioSystem::startOutput(audio_io_handle_t output, 600 audio_stream_type_t stream, 601 int session) 602 { 603 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service(); 604 if (aps == 0) return PERMISSION_DENIED; 605 return aps->startOutput(output, stream, session); 606 } 607 608 status_t AudioSystem::stopOutput(audio_io_handle_t output, 609 audio_stream_type_t stream, 610 int session) 611 { 612 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service(); 613 if (aps == 0) return PERMISSION_DENIED; 614 return aps->stopOutput(output, stream, session); 615 } 616 617 void AudioSystem::releaseOutput(audio_io_handle_t output) 618 { 619 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service(); 620 if (aps == 0) return; 621 aps->releaseOutput(output); 622 } 623 624 audio_io_handle_t AudioSystem::getInput(audio_source_t inputSource, 625 uint32_t samplingRate, 626 audio_format_t format, 627 uint32_t channels, 628 audio_in_acoustics_t acoustics, 629 int sessionId) 630 { 631 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service(); 632 if (aps == 0) return 0; 633 return aps->getInput(inputSource, samplingRate, format, channels, acoustics, sessionId); 634 } 635 636 status_t AudioSystem::startInput(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->startInput(input); 641 } 642 643 status_t AudioSystem::stopInput(audio_io_handle_t input) 644 { 645 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service(); 646 if (aps == 0) return PERMISSION_DENIED; 647 return aps->stopInput(input); 648 } 649 650 void AudioSystem::releaseInput(audio_io_handle_t input) 651 { 652 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service(); 653 if (aps == 0) return; 654 aps->releaseInput(input); 655 } 656 657 status_t AudioSystem::initStreamVolume(audio_stream_type_t stream, 658 int indexMin, 659 int indexMax) 660 { 661 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service(); 662 if (aps == 0) return PERMISSION_DENIED; 663 return aps->initStreamVolume(stream, indexMin, indexMax); 664 } 665 666 status_t AudioSystem::setStreamVolumeIndex(audio_stream_type_t stream, 667 int index, 668 audio_devices_t device) 669 { 670 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service(); 671 if (aps == 0) return PERMISSION_DENIED; 672 return aps->setStreamVolumeIndex(stream, index, device); 673 } 674 675 status_t AudioSystem::getStreamVolumeIndex(audio_stream_type_t stream, 676 int *index, 677 audio_devices_t device) 678 { 679 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service(); 680 if (aps == 0) return PERMISSION_DENIED; 681 return aps->getStreamVolumeIndex(stream, index, device); 682 } 683 684 uint32_t AudioSystem::getStrategyForStream(audio_stream_type_t stream) 685 { 686 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service(); 687 if (aps == 0) return 0; 688 return aps->getStrategyForStream(stream); 689 } 690 691 audio_devices_t AudioSystem::getDevicesForStream(audio_stream_type_t stream) 692 { 693 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service(); 694 if (aps == 0) return (audio_devices_t)0; 695 return aps->getDevicesForStream(stream); 696 } 697 698 audio_io_handle_t AudioSystem::getOutputForEffect(effect_descriptor_t *desc) 699 { 700 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service(); 701 if (aps == 0) return PERMISSION_DENIED; 702 return aps->getOutputForEffect(desc); 703 } 704 705 status_t AudioSystem::registerEffect(effect_descriptor_t *desc, 706 audio_io_handle_t io, 707 uint32_t strategy, 708 int session, 709 int id) 710 { 711 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service(); 712 if (aps == 0) return PERMISSION_DENIED; 713 return aps->registerEffect(desc, io, strategy, session, id); 714 } 715 716 status_t AudioSystem::unregisterEffect(int id) 717 { 718 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service(); 719 if (aps == 0) return PERMISSION_DENIED; 720 return aps->unregisterEffect(id); 721 } 722 723 status_t AudioSystem::setEffectEnabled(int id, bool enabled) 724 { 725 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service(); 726 if (aps == 0) return PERMISSION_DENIED; 727 return aps->setEffectEnabled(id, enabled); 728 } 729 730 status_t AudioSystem::isStreamActive(audio_stream_type_t stream, bool* state, uint32_t inPastMs) 731 { 732 const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service(); 733 if (aps == 0) return PERMISSION_DENIED; 734 if (state == NULL) return BAD_VALUE; 735 *state = aps->isStreamActive(stream, inPastMs); 736 return NO_ERROR; 737 } 738 739 740 void AudioSystem::clearAudioConfigCache() 741 { 742 Mutex::Autolock _l(gLock); 743 ALOGV("clearAudioConfigCache()"); 744 gOutputs.clear(); 745 } 746 747 // --------------------------------------------------------------------------- 748 749 void AudioSystem::AudioPolicyServiceClient::binderDied(const wp<IBinder>& who) { 750 Mutex::Autolock _l(AudioSystem::gLock); 751 AudioSystem::gAudioPolicyService.clear(); 752 753 ALOGW("AudioPolicyService server died!"); 754 } 755 756 }; // namespace android 757