AudioRecord.cpp revision 864585df53eb97c31e77b3ad7c0d89e4f9b42588
1/* 2** 3** Copyright 2008, The Android Open Source Project 4** 5** Licensed under the Apache License, Version 2.0 (the "License"); 6** you may not use this file except in compliance with the License. 7** You may obtain a copy of the License at 8** 9** http://www.apache.org/licenses/LICENSE-2.0 10** 11** Unless required by applicable law or agreed to in writing, software 12** distributed under the License is distributed on an "AS IS" BASIS, 13** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14** See the License for the specific language governing permissions and 15** limitations under the License. 16*/ 17 18//#define LOG_NDEBUG 0 19#define LOG_TAG "AudioRecord" 20 21#include <sys/resource.h> 22#include <sys/types.h> 23 24#include <binder/IPCThreadState.h> 25#include <cutils/atomic.h> 26#include <cutils/compiler.h> 27#include <media/AudioRecord.h> 28#include <media/AudioSystem.h> 29#include <system/audio.h> 30#include <utils/Log.h> 31 32#include <private/media/AudioTrackShared.h> 33 34namespace android { 35// --------------------------------------------------------------------------- 36 37// static 38status_t AudioRecord::getMinFrameCount( 39 int* frameCount, 40 uint32_t sampleRate, 41 audio_format_t format, 42 audio_channel_mask_t channelMask) 43{ 44 if (frameCount == NULL) return BAD_VALUE; 45 46 // default to 0 in case of error 47 *frameCount = 0; 48 49 size_t size = 0; 50 if (AudioSystem::getInputBufferSize(sampleRate, format, channelMask, &size) 51 != NO_ERROR) { 52 ALOGE("AudioSystem could not query the input buffer size."); 53 return NO_INIT; 54 } 55 56 if (size == 0) { 57 ALOGE("Unsupported configuration: sampleRate %d, format %d, channelMask %#x", 58 sampleRate, format, channelMask); 59 return BAD_VALUE; 60 } 61 62 // We double the size of input buffer for ping pong use of record buffer. 63 size <<= 1; 64 65 if (audio_is_linear_pcm(format)) { 66 int channelCount = popcount(channelMask); 67 size /= channelCount * audio_bytes_per_sample(format); 68 } 69 70 *frameCount = size; 71 return NO_ERROR; 72} 73 74// --------------------------------------------------------------------------- 75 76AudioRecord::AudioRecord() 77 : mStatus(NO_INIT), mSessionId(0), 78 mPreviousPriority(ANDROID_PRIORITY_NORMAL), mPreviousSchedulingGroup(SP_DEFAULT) 79{ 80} 81 82AudioRecord::AudioRecord( 83 audio_source_t inputSource, 84 uint32_t sampleRate, 85 audio_format_t format, 86 audio_channel_mask_t channelMask, 87 int frameCount, 88 callback_t cbf, 89 void* user, 90 int notificationFrames, 91 int sessionId) 92 : mStatus(NO_INIT), mSessionId(0), 93 mPreviousPriority(ANDROID_PRIORITY_NORMAL), mPreviousSchedulingGroup(SP_DEFAULT) 94{ 95 mStatus = set(inputSource, sampleRate, format, channelMask, 96 frameCount, cbf, user, notificationFrames, sessionId); 97} 98 99AudioRecord::~AudioRecord() 100{ 101 if (mStatus == NO_ERROR) { 102 // Make sure that callback function exits in the case where 103 // it is looping on buffer empty condition in obtainBuffer(). 104 // Otherwise the callback thread will never exit. 105 stop(); 106 if (mAudioRecordThread != 0) { 107 mAudioRecordThread->requestExit(); // see comment in AudioRecord.h 108 mAudioRecordThread->requestExitAndWait(); 109 mAudioRecordThread.clear(); 110 } 111 mAudioRecord.clear(); 112 IPCThreadState::self()->flushCommands(); 113 AudioSystem::releaseAudioSessionId(mSessionId); 114 } 115} 116 117status_t AudioRecord::set( 118 audio_source_t inputSource, 119 uint32_t sampleRate, 120 audio_format_t format, 121 audio_channel_mask_t channelMask, 122 int frameCount, 123 callback_t cbf, 124 void* user, 125 int notificationFrames, 126 bool threadCanCallJava, 127 int sessionId) 128{ 129 130 ALOGV("set(): sampleRate %d, channelMask %#x, frameCount %d",sampleRate, channelMask, 131 frameCount); 132 133 AutoMutex lock(mLock); 134 135 if (mAudioRecord != 0) { 136 return INVALID_OPERATION; 137 } 138 139 if (inputSource == AUDIO_SOURCE_DEFAULT) { 140 inputSource = AUDIO_SOURCE_MIC; 141 } 142 143 if (sampleRate == 0) { 144 sampleRate = DEFAULT_SAMPLE_RATE; 145 } 146 // these below should probably come from the audioFlinger too... 147 if (format == AUDIO_FORMAT_DEFAULT) { 148 format = AUDIO_FORMAT_PCM_16_BIT; 149 } 150 // validate parameters 151 if (!audio_is_valid_format(format)) { 152 ALOGE("Invalid format"); 153 return BAD_VALUE; 154 } 155 156 if (!audio_is_input_channel(channelMask)) { 157 return BAD_VALUE; 158 } 159 160 int channelCount = popcount(channelMask); 161 162 if (sessionId == 0 ) { 163 mSessionId = AudioSystem::newAudioSessionId(); 164 } else { 165 mSessionId = sessionId; 166 } 167 ALOGV("set(): mSessionId %d", mSessionId); 168 169 audio_io_handle_t input = AudioSystem::getInput(inputSource, 170 sampleRate, 171 format, 172 channelMask, 173 mSessionId); 174 if (input == 0) { 175 ALOGE("Could not get audio input for record source %d", inputSource); 176 return BAD_VALUE; 177 } 178 179 // validate framecount 180 int minFrameCount = 0; 181 status_t status = getMinFrameCount(&minFrameCount, sampleRate, format, channelMask); 182 if (status != NO_ERROR) { 183 return status; 184 } 185 ALOGV("AudioRecord::set() minFrameCount = %d", minFrameCount); 186 187 if (frameCount == 0) { 188 frameCount = minFrameCount; 189 } else if (frameCount < minFrameCount) { 190 return BAD_VALUE; 191 } 192 193 if (notificationFrames == 0) { 194 notificationFrames = frameCount/2; 195 } 196 197 // create the IAudioRecord 198 status = openRecord_l(sampleRate, format, channelMask, 199 frameCount, input); 200 if (status != NO_ERROR) { 201 return status; 202 } 203 204 if (cbf != NULL) { 205 mAudioRecordThread = new AudioRecordThread(*this, threadCanCallJava); 206 mAudioRecordThread->run("AudioRecord", ANDROID_PRIORITY_AUDIO); 207 } 208 209 mStatus = NO_ERROR; 210 211 mFormat = format; 212 // Update buffer size in case it has been limited by AudioFlinger during track creation 213 mFrameCount = mCblk->frameCount; 214 mChannelCount = (uint8_t)channelCount; 215 mChannelMask = channelMask; 216 mActive = false; 217 mCbf = cbf; 218 mNotificationFrames = notificationFrames; 219 mRemainingFrames = notificationFrames; 220 mUserData = user; 221 // TODO: add audio hardware input latency here 222 mLatency = (1000*mFrameCount) / sampleRate; 223 mMarkerPosition = 0; 224 mMarkerReached = false; 225 mNewPosition = 0; 226 mUpdatePeriod = 0; 227 mInputSource = inputSource; 228 mInput = input; 229 AudioSystem::acquireAudioSessionId(mSessionId); 230 231 return NO_ERROR; 232} 233 234status_t AudioRecord::initCheck() const 235{ 236 return mStatus; 237} 238 239// ------------------------------------------------------------------------- 240 241uint32_t AudioRecord::latency() const 242{ 243 return mLatency; 244} 245 246audio_format_t AudioRecord::format() const 247{ 248 return mFormat; 249} 250 251int AudioRecord::channelCount() const 252{ 253 return mChannelCount; 254} 255 256uint32_t AudioRecord::frameCount() const 257{ 258 return mFrameCount; 259} 260 261size_t AudioRecord::frameSize() const 262{ 263 if (audio_is_linear_pcm(mFormat)) { 264 return channelCount()*audio_bytes_per_sample(mFormat); 265 } else { 266 return sizeof(uint8_t); 267 } 268} 269 270audio_source_t AudioRecord::inputSource() const 271{ 272 return mInputSource; 273} 274 275// ------------------------------------------------------------------------- 276 277status_t AudioRecord::start(AudioSystem::sync_event_t event, int triggerSession) 278{ 279 status_t ret = NO_ERROR; 280 sp<AudioRecordThread> t = mAudioRecordThread; 281 282 ALOGV("start, sync event %d trigger session %d", event, triggerSession); 283 284 AutoMutex lock(mLock); 285 // acquire a strong reference on the IAudioRecord and IMemory so that they cannot be destroyed 286 // while we are accessing the cblk 287 sp<IAudioRecord> audioRecord = mAudioRecord; 288 sp<IMemory> iMem = mCblkMemory; 289 audio_track_cblk_t* cblk = mCblk; 290 291 if (!mActive) { 292 mActive = true; 293 294 cblk->lock.lock(); 295 if (!(cblk->flags & CBLK_INVALID)) { 296 cblk->lock.unlock(); 297 ALOGV("mAudioRecord->start()"); 298 ret = mAudioRecord->start(event, triggerSession); 299 cblk->lock.lock(); 300 if (ret == DEAD_OBJECT) { 301 android_atomic_or(CBLK_INVALID, &cblk->flags); 302 } 303 } 304 if (cblk->flags & CBLK_INVALID) { 305 ret = restoreRecord_l(cblk); 306 } 307 cblk->lock.unlock(); 308 if (ret == NO_ERROR) { 309 mNewPosition = cblk->user + mUpdatePeriod; 310 cblk->bufferTimeoutMs = (event == AudioSystem::SYNC_EVENT_NONE) ? MAX_RUN_TIMEOUT_MS : 311 AudioSystem::kSyncRecordStartTimeOutMs; 312 cblk->waitTimeMs = 0; 313 if (t != 0) { 314 t->resume(); 315 } else { 316 mPreviousPriority = getpriority(PRIO_PROCESS, 0); 317 get_sched_policy(0, &mPreviousSchedulingGroup); 318 androidSetThreadPriority(0, ANDROID_PRIORITY_AUDIO); 319 } 320 } else { 321 mActive = false; 322 } 323 } 324 325 return ret; 326} 327 328void AudioRecord::stop() 329{ 330 sp<AudioRecordThread> t = mAudioRecordThread; 331 332 ALOGV("stop"); 333 334 AutoMutex lock(mLock); 335 if (mActive) { 336 mActive = false; 337 mCblk->cv.signal(); 338 mAudioRecord->stop(); 339 // the record head position will reset to 0, so if a marker is set, we need 340 // to activate it again 341 mMarkerReached = false; 342 if (t != 0) { 343 t->pause(); 344 } else { 345 setpriority(PRIO_PROCESS, 0, mPreviousPriority); 346 set_sched_policy(0, mPreviousSchedulingGroup); 347 } 348 } 349} 350 351bool AudioRecord::stopped() const 352{ 353 AutoMutex lock(mLock); 354 return !mActive; 355} 356 357uint32_t AudioRecord::getSampleRate() const 358{ 359 return mCblk->sampleRate; 360} 361 362status_t AudioRecord::setMarkerPosition(uint32_t marker) 363{ 364 if (mCbf == NULL) return INVALID_OPERATION; 365 366 AutoMutex lock(mLock); 367 mMarkerPosition = marker; 368 mMarkerReached = false; 369 370 return NO_ERROR; 371} 372 373status_t AudioRecord::getMarkerPosition(uint32_t *marker) const 374{ 375 if (marker == NULL) return BAD_VALUE; 376 377 AutoMutex lock(mLock); 378 *marker = mMarkerPosition; 379 380 return NO_ERROR; 381} 382 383status_t AudioRecord::setPositionUpdatePeriod(uint32_t updatePeriod) 384{ 385 if (mCbf == NULL) return INVALID_OPERATION; 386 387 uint32_t curPosition; 388 getPosition(&curPosition); 389 390 AutoMutex lock(mLock); 391 mNewPosition = curPosition + updatePeriod; 392 mUpdatePeriod = updatePeriod; 393 394 return NO_ERROR; 395} 396 397status_t AudioRecord::getPositionUpdatePeriod(uint32_t *updatePeriod) const 398{ 399 if (updatePeriod == NULL) return BAD_VALUE; 400 401 AutoMutex lock(mLock); 402 *updatePeriod = mUpdatePeriod; 403 404 return NO_ERROR; 405} 406 407status_t AudioRecord::getPosition(uint32_t *position) const 408{ 409 if (position == NULL) return BAD_VALUE; 410 411 AutoMutex lock(mLock); 412 *position = mCblk->user; 413 414 return NO_ERROR; 415} 416 417unsigned int AudioRecord::getInputFramesLost() const 418{ 419 // no need to check mActive, because if inactive this will return 0, which is what we want 420 return AudioSystem::getInputFramesLost(mInput); 421} 422 423// ------------------------------------------------------------------------- 424 425// must be called with mLock held 426status_t AudioRecord::openRecord_l( 427 uint32_t sampleRate, 428 audio_format_t format, 429 audio_channel_mask_t channelMask, 430 int frameCount, 431 audio_io_handle_t input) 432{ 433 status_t status; 434 const sp<IAudioFlinger>& audioFlinger = AudioSystem::get_audio_flinger(); 435 if (audioFlinger == 0) { 436 return NO_INIT; 437 } 438 439 pid_t tid = -1; 440 // FIXME see similar logic at AudioTrack 441 442 int originalSessionId = mSessionId; 443 sp<IAudioRecord> record = audioFlinger->openRecord(getpid(), input, 444 sampleRate, format, 445 channelMask, 446 frameCount, 447 IAudioFlinger::TRACK_DEFAULT, 448 tid, 449 &mSessionId, 450 &status); 451 ALOGE_IF(originalSessionId != 0 && mSessionId != originalSessionId, 452 "session ID changed from %d to %d", originalSessionId, mSessionId); 453 454 if (record == 0) { 455 ALOGE("AudioFlinger could not create record track, status: %d", status); 456 return status; 457 } 458 sp<IMemory> cblk = record->getCblk(); 459 if (cblk == 0) { 460 ALOGE("Could not get control block"); 461 return NO_INIT; 462 } 463 mAudioRecord.clear(); 464 mAudioRecord = record; 465 mCblkMemory.clear(); 466 mCblkMemory = cblk; 467 mCblk = static_cast<audio_track_cblk_t*>(cblk->pointer()); 468 mCblk->buffers = (char*)mCblk + sizeof(audio_track_cblk_t); 469 mCblk->bufferTimeoutMs = MAX_RUN_TIMEOUT_MS; 470 mCblk->waitTimeMs = 0; 471 return NO_ERROR; 472} 473 474status_t AudioRecord::obtainBuffer(Buffer* audioBuffer, int32_t waitCount) 475{ 476 AutoMutex lock(mLock); 477 bool active; 478 status_t result = NO_ERROR; 479 audio_track_cblk_t* cblk = mCblk; 480 uint32_t framesReq = audioBuffer->frameCount; 481 uint32_t waitTimeMs = (waitCount < 0) ? cblk->bufferTimeoutMs : WAIT_PERIOD_MS; 482 483 audioBuffer->frameCount = 0; 484 audioBuffer->size = 0; 485 486 uint32_t framesReady = cblk->framesReadyIn(); 487 488 if (framesReady == 0) { 489 cblk->lock.lock(); 490 goto start_loop_here; 491 while (framesReady == 0) { 492 active = mActive; 493 if (CC_UNLIKELY(!active)) { 494 cblk->lock.unlock(); 495 return NO_MORE_BUFFERS; 496 } 497 if (CC_UNLIKELY(!waitCount)) { 498 cblk->lock.unlock(); 499 return WOULD_BLOCK; 500 } 501 if (!(cblk->flags & CBLK_INVALID)) { 502 mLock.unlock(); 503 result = cblk->cv.waitRelative(cblk->lock, milliseconds(waitTimeMs)); 504 cblk->lock.unlock(); 505 mLock.lock(); 506 if (!mActive) { 507 return status_t(STOPPED); 508 } 509 cblk->lock.lock(); 510 } 511 if (cblk->flags & CBLK_INVALID) { 512 goto create_new_record; 513 } 514 if (CC_UNLIKELY(result != NO_ERROR)) { 515 cblk->waitTimeMs += waitTimeMs; 516 if (cblk->waitTimeMs >= cblk->bufferTimeoutMs) { 517 ALOGW( "obtainBuffer timed out (is the CPU pegged?) " 518 "user=%08x, server=%08x", cblk->user, cblk->server); 519 cblk->lock.unlock(); 520 // callback thread or sync event hasn't changed 521 result = mAudioRecord->start(AudioSystem::SYNC_EVENT_SAME, 0); 522 cblk->lock.lock(); 523 if (result == DEAD_OBJECT) { 524 android_atomic_or(CBLK_INVALID, &cblk->flags); 525create_new_record: 526 result = AudioRecord::restoreRecord_l(cblk); 527 } 528 if (result != NO_ERROR) { 529 ALOGW("obtainBuffer create Track error %d", result); 530 cblk->lock.unlock(); 531 return result; 532 } 533 cblk->waitTimeMs = 0; 534 } 535 if (--waitCount == 0) { 536 cblk->lock.unlock(); 537 return TIMED_OUT; 538 } 539 } 540 // read the server count again 541 start_loop_here: 542 framesReady = cblk->framesReadyIn(); 543 } 544 cblk->lock.unlock(); 545 } 546 547 cblk->waitTimeMs = 0; 548 // reset time out to running value after obtaining a buffer 549 cblk->bufferTimeoutMs = MAX_RUN_TIMEOUT_MS; 550 551 if (framesReq > framesReady) { 552 framesReq = framesReady; 553 } 554 555 uint32_t u = cblk->user; 556 uint32_t bufferEnd = cblk->userBase + cblk->frameCount; 557 558 if (framesReq > bufferEnd - u) { 559 framesReq = bufferEnd - u; 560 } 561 562 audioBuffer->frameCount = framesReq; 563 audioBuffer->size = framesReq*cblk->frameSize; 564 audioBuffer->raw = (int8_t*)cblk->buffer(u); 565 active = mActive; 566 return active ? status_t(NO_ERROR) : status_t(STOPPED); 567} 568 569void AudioRecord::releaseBuffer(Buffer* audioBuffer) 570{ 571 AutoMutex lock(mLock); 572 mCblk->stepUserIn(audioBuffer->frameCount); 573} 574 575audio_io_handle_t AudioRecord::getInput() const 576{ 577 AutoMutex lock(mLock); 578 return mInput; 579} 580 581// must be called with mLock held 582audio_io_handle_t AudioRecord::getInput_l() 583{ 584 mInput = AudioSystem::getInput(mInputSource, 585 mCblk->sampleRate, 586 mFormat, 587 mChannelMask, 588 mSessionId); 589 return mInput; 590} 591 592int AudioRecord::getSessionId() const 593{ 594 // no lock needed because session ID doesn't change after first set() 595 return mSessionId; 596} 597 598// ------------------------------------------------------------------------- 599 600ssize_t AudioRecord::read(void* buffer, size_t userSize) 601{ 602 ssize_t read = 0; 603 Buffer audioBuffer; 604 int8_t *dst = static_cast<int8_t*>(buffer); 605 606 if (ssize_t(userSize) < 0) { 607 // sanity-check. user is most-likely passing an error code. 608 ALOGE("AudioRecord::read(buffer=%p, size=%u (%d)", 609 buffer, userSize, userSize); 610 return BAD_VALUE; 611 } 612 613 mLock.lock(); 614 // acquire a strong reference on the IAudioRecord and IMemory so that they cannot be destroyed 615 // while we are accessing the cblk 616 sp<IAudioRecord> audioRecord = mAudioRecord; 617 sp<IMemory> iMem = mCblkMemory; 618 mLock.unlock(); 619 620 do { 621 622 audioBuffer.frameCount = userSize/frameSize(); 623 624 // By using a wait count corresponding to twice the timeout period in 625 // obtainBuffer() we give a chance to recover once for a read timeout 626 // (if media_server crashed for instance) before returning a length of 627 // 0 bytes read to the client 628 status_t err = obtainBuffer(&audioBuffer, ((2 * MAX_RUN_TIMEOUT_MS) / WAIT_PERIOD_MS)); 629 if (err < 0) { 630 // out of buffers, return #bytes written 631 if (err == status_t(NO_MORE_BUFFERS)) 632 break; 633 if (err == status_t(TIMED_OUT)) 634 err = 0; 635 return ssize_t(err); 636 } 637 638 size_t bytesRead = audioBuffer.size; 639 memcpy(dst, audioBuffer.i8, bytesRead); 640 641 dst += bytesRead; 642 userSize -= bytesRead; 643 read += bytesRead; 644 645 releaseBuffer(&audioBuffer); 646 } while (userSize); 647 648 return read; 649} 650 651// ------------------------------------------------------------------------- 652 653bool AudioRecord::processAudioBuffer(const sp<AudioRecordThread>& thread) 654{ 655 Buffer audioBuffer; 656 uint32_t frames = mRemainingFrames; 657 size_t readSize; 658 659 mLock.lock(); 660 // acquire a strong reference on the IAudioRecord and IMemory so that they cannot be destroyed 661 // while we are accessing the cblk 662 sp<IAudioRecord> audioRecord = mAudioRecord; 663 sp<IMemory> iMem = mCblkMemory; 664 audio_track_cblk_t* cblk = mCblk; 665 bool active = mActive; 666 uint32_t markerPosition = mMarkerPosition; 667 uint32_t newPosition = mNewPosition; 668 uint32_t user = cblk->user; 669 // determine whether a marker callback will be needed, while locked 670 bool needMarker = !mMarkerReached && (mMarkerPosition > 0) && (user >= mMarkerPosition); 671 if (needMarker) { 672 mMarkerReached = true; 673 } 674 // determine the number of new position callback(s) that will be needed, while locked 675 uint32_t updatePeriod = mUpdatePeriod; 676 uint32_t needNewPos = updatePeriod > 0 && user >= newPosition ? 677 ((user - newPosition) / updatePeriod) + 1 : 0; 678 mNewPosition = newPosition + updatePeriod * needNewPos; 679 mLock.unlock(); 680 681 // perform marker callback, while unlocked 682 if (needMarker) { 683 mCbf(EVENT_MARKER, mUserData, &markerPosition); 684 } 685 686 // perform new position callback(s), while unlocked 687 for (; needNewPos > 0; --needNewPos) { 688 uint32_t temp = newPosition; 689 mCbf(EVENT_NEW_POS, mUserData, &temp); 690 newPosition += updatePeriod; 691 } 692 693 do { 694 audioBuffer.frameCount = frames; 695 // Calling obtainBuffer() with a wait count of 1 696 // limits wait time to WAIT_PERIOD_MS. This prevents from being 697 // stuck here not being able to handle timed events (position, markers). 698 status_t err = obtainBuffer(&audioBuffer, 1); 699 if (err < NO_ERROR) { 700 if (err != TIMED_OUT) { 701 ALOGE_IF(err != status_t(NO_MORE_BUFFERS), 702 "Error obtaining an audio buffer, giving up."); 703 return false; 704 } 705 break; 706 } 707 if (err == status_t(STOPPED)) return false; 708 709 size_t reqSize = audioBuffer.size; 710 mCbf(EVENT_MORE_DATA, mUserData, &audioBuffer); 711 readSize = audioBuffer.size; 712 713 // Sanity check on returned size 714 if (ssize_t(readSize) <= 0) { 715 // The callback is done filling buffers 716 // Keep this thread going to handle timed events and 717 // still try to get more data in intervals of WAIT_PERIOD_MS 718 // but don't just loop and block the CPU, so wait 719 usleep(WAIT_PERIOD_MS*1000); 720 break; 721 } 722 if (readSize > reqSize) readSize = reqSize; 723 724 audioBuffer.size = readSize; 725 audioBuffer.frameCount = readSize/frameSize(); 726 frames -= audioBuffer.frameCount; 727 728 releaseBuffer(&audioBuffer); 729 730 } while (frames); 731 732 733 // Manage overrun callback 734 if (active && (cblk->framesAvailableIn() == 0)) { 735 // The value of active is stale, but we are almost sure to be active here because 736 // otherwise we would have exited when obtainBuffer returned STOPPED earlier. 737 ALOGV("Overrun user: %x, server: %x, flags %04x", cblk->user, cblk->server, cblk->flags); 738 if (!(android_atomic_or(CBLK_UNDERRUN, &cblk->flags) & CBLK_UNDERRUN)) { 739 mCbf(EVENT_OVERRUN, mUserData, NULL); 740 } 741 } 742 743 if (frames == 0) { 744 mRemainingFrames = mNotificationFrames; 745 } else { 746 mRemainingFrames = frames; 747 } 748 return true; 749} 750 751// must be called with mLock and cblk.lock held. Callers must also hold strong references on 752// the IAudioRecord and IMemory in case they are recreated here. 753// If the IAudioRecord is successfully restored, the cblk pointer is updated 754status_t AudioRecord::restoreRecord_l(audio_track_cblk_t*& cblk) 755{ 756 status_t result; 757 758 if (!(android_atomic_or(CBLK_RESTORING, &cblk->flags) & CBLK_RESTORING)) { 759 ALOGW("dead IAudioRecord, creating a new one"); 760 // signal old cblk condition so that other threads waiting for available buffers stop 761 // waiting now 762 cblk->cv.broadcast(); 763 cblk->lock.unlock(); 764 765 // if the new IAudioRecord is created, openRecord_l() will modify the 766 // following member variables: mAudioRecord, mCblkMemory and mCblk. 767 // It will also delete the strong references on previous IAudioRecord and IMemory 768 result = openRecord_l(cblk->sampleRate, mFormat, mChannelMask, 769 mFrameCount, getInput_l()); 770 if (result == NO_ERROR) { 771 // callback thread or sync event hasn't changed 772 result = mAudioRecord->start(AudioSystem::SYNC_EVENT_SAME, 0); 773 } 774 if (result != NO_ERROR) { 775 mActive = false; 776 } 777 778 // signal old cblk condition for other threads waiting for restore completion 779 android_atomic_or(CBLK_RESTORED, &cblk->flags); 780 cblk->cv.broadcast(); 781 } else { 782 if (!(cblk->flags & CBLK_RESTORED)) { 783 ALOGW("dead IAudioRecord, waiting for a new one to be created"); 784 mLock.unlock(); 785 result = cblk->cv.waitRelative(cblk->lock, milliseconds(RESTORE_TIMEOUT_MS)); 786 cblk->lock.unlock(); 787 mLock.lock(); 788 } else { 789 ALOGW("dead IAudioRecord, already restored"); 790 result = NO_ERROR; 791 cblk->lock.unlock(); 792 } 793 if (result != NO_ERROR || !mActive) { 794 result = status_t(STOPPED); 795 } 796 } 797 ALOGV("restoreRecord_l() status %d mActive %d cblk %p, old cblk %p flags %08x old flags %08x", 798 result, mActive, mCblk, cblk, mCblk->flags, cblk->flags); 799 800 if (result == NO_ERROR) { 801 // from now on we switch to the newly created cblk 802 cblk = mCblk; 803 } 804 cblk->lock.lock(); 805 806 ALOGW_IF(result != NO_ERROR, "restoreRecord_l() error %d", result); 807 808 return result; 809} 810 811// ========================================================================= 812 813AudioRecord::AudioRecordThread::AudioRecordThread(AudioRecord& receiver, bool bCanCallJava) 814 : Thread(bCanCallJava), mReceiver(receiver), mPaused(true) 815{ 816} 817 818AudioRecord::AudioRecordThread::~AudioRecordThread() 819{ 820} 821 822bool AudioRecord::AudioRecordThread::threadLoop() 823{ 824 { 825 AutoMutex _l(mMyLock); 826 if (mPaused) { 827 mMyCond.wait(mMyLock); 828 // caller will check for exitPending() 829 return true; 830 } 831 } 832 if (!mReceiver.processAudioBuffer(this)) { 833 pause(); 834 } 835 return true; 836} 837 838void AudioRecord::AudioRecordThread::requestExit() 839{ 840 // must be in this order to avoid a race condition 841 Thread::requestExit(); 842 resume(); 843} 844 845void AudioRecord::AudioRecordThread::pause() 846{ 847 AutoMutex _l(mMyLock); 848 mPaused = true; 849} 850 851void AudioRecord::AudioRecordThread::resume() 852{ 853 AutoMutex _l(mMyLock); 854 if (mPaused) { 855 mPaused = false; 856 mMyCond.signal(); 857 } 858} 859 860// ------------------------------------------------------------------------- 861 862}; // namespace android 863