AudioRecord.cpp revision a011e35b22f95f558d81dc9c94b68b1465c4661d
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 <stdint.h> 22#include <sys/types.h> 23 24#include <sched.h> 25#include <sys/resource.h> 26 27#include <private/media/AudioTrackShared.h> 28 29#include <media/AudioSystem.h> 30#include <media/AudioRecord.h> 31#include <media/mediarecorder.h> 32 33#include <binder/IServiceManager.h> 34#include <utils/Log.h> 35#include <binder/Parcel.h> 36#include <binder/IPCThreadState.h> 37#include <utils/Timers.h> 38#include <utils/Atomic.h> 39 40#include <system/audio.h> 41#include <cutils/bitops.h> 42#include <cutils/compiler.h> 43 44namespace android { 45// --------------------------------------------------------------------------- 46 47// static 48status_t AudioRecord::getMinFrameCount( 49 int* frameCount, 50 uint32_t sampleRate, 51 audio_format_t format, 52 int channelCount) 53{ 54 size_t size = 0; 55 if (AudioSystem::getInputBufferSize(sampleRate, format, channelCount, &size) 56 != NO_ERROR) { 57 ALOGE("AudioSystem could not query the input buffer size."); 58 return NO_INIT; 59 } 60 61 if (size == 0) { 62 ALOGE("Unsupported configuration: sampleRate %d, format %d, channelCount %d", 63 sampleRate, format, channelCount); 64 return BAD_VALUE; 65 } 66 67 // We double the size of input buffer for ping pong use of record buffer. 68 size <<= 1; 69 70 if (audio_is_linear_pcm(format)) { 71 size /= channelCount * audio_bytes_per_sample(format); 72 } 73 74 *frameCount = size; 75 return NO_ERROR; 76} 77 78// --------------------------------------------------------------------------- 79 80AudioRecord::AudioRecord() 81 : mStatus(NO_INIT), mSessionId(0), 82 mPreviousPriority(ANDROID_PRIORITY_NORMAL), mPreviousSchedulingGroup(ANDROID_TGROUP_DEFAULT) 83{ 84} 85 86AudioRecord::AudioRecord( 87 audio_source_t inputSource, 88 uint32_t sampleRate, 89 audio_format_t format, 90 uint32_t channelMask, 91 int frameCount, 92 record_flags flags, 93 callback_t cbf, 94 void* user, 95 int notificationFrames, 96 int sessionId) 97 : mStatus(NO_INIT), mSessionId(0), 98 mPreviousPriority(ANDROID_PRIORITY_NORMAL), mPreviousSchedulingGroup(ANDROID_TGROUP_DEFAULT) 99{ 100 mStatus = set(inputSource, sampleRate, format, channelMask, 101 frameCount, flags, cbf, user, notificationFrames, sessionId); 102} 103 104AudioRecord::~AudioRecord() 105{ 106 if (mStatus == NO_ERROR) { 107 // Make sure that callback function exits in the case where 108 // it is looping on buffer empty condition in obtainBuffer(). 109 // Otherwise the callback thread will never exit. 110 stop(); 111 if (mClientRecordThread != 0) { 112 mClientRecordThread->requestExitAndWait(); 113 mClientRecordThread.clear(); 114 } 115 mAudioRecord.clear(); 116 IPCThreadState::self()->flushCommands(); 117 AudioSystem::releaseAudioSessionId(mSessionId); 118 } 119} 120 121status_t AudioRecord::set( 122 audio_source_t inputSource, 123 uint32_t sampleRate, 124 audio_format_t format, 125 uint32_t channelMask, 126 int frameCount, 127 record_flags flags, 128 callback_t cbf, 129 void* user, 130 int notificationFrames, 131 bool threadCanCallJava, 132 int sessionId) 133{ 134 135 ALOGV("set(): sampleRate %d, channelMask %d, frameCount %d",sampleRate, channelMask, frameCount); 136 137 AutoMutex lock(mLock); 138 139 if (mAudioRecord != 0) { 140 return INVALID_OPERATION; 141 } 142 143 if (inputSource == AUDIO_SOURCE_DEFAULT) { 144 inputSource = AUDIO_SOURCE_MIC; 145 } 146 147 if (sampleRate == 0) { 148 sampleRate = DEFAULT_SAMPLE_RATE; 149 } 150 // these below should probably come from the audioFlinger too... 151 if (format == AUDIO_FORMAT_DEFAULT) { 152 format = AUDIO_FORMAT_PCM_16_BIT; 153 } 154 // validate parameters 155 if (!audio_is_valid_format(format)) { 156 ALOGE("Invalid format"); 157 return BAD_VALUE; 158 } 159 160 if (!audio_is_input_channel(channelMask)) { 161 return BAD_VALUE; 162 } 163 164 int channelCount = popcount(channelMask); 165 166 if (sessionId == 0 ) { 167 mSessionId = AudioSystem::newAudioSessionId(); 168 } else { 169 mSessionId = sessionId; 170 } 171 ALOGV("set(): mSessionId %d", mSessionId); 172 173 audio_io_handle_t input = AudioSystem::getInput(inputSource, 174 sampleRate, 175 format, 176 channelMask, 177 (audio_in_acoustics_t)flags, 178 mSessionId); 179 if (input == 0) { 180 ALOGE("Could not get audio input for record source %d", inputSource); 181 return BAD_VALUE; 182 } 183 184 // validate framecount 185 int minFrameCount = 0; 186 status_t status = getMinFrameCount(&minFrameCount, sampleRate, format, channelCount); 187 if (status != NO_ERROR) { 188 return status; 189 } 190 ALOGV("AudioRecord::set() minFrameCount = %d", minFrameCount); 191 192 if (frameCount == 0) { 193 frameCount = minFrameCount; 194 } else if (frameCount < minFrameCount) { 195 return BAD_VALUE; 196 } 197 198 if (notificationFrames == 0) { 199 notificationFrames = frameCount/2; 200 } 201 202 // create the IAudioRecord 203 status = openRecord_l(sampleRate, format, channelMask, 204 frameCount, input); 205 if (status != NO_ERROR) { 206 return status; 207 } 208 209 if (cbf != NULL) { 210 mClientRecordThread = new ClientRecordThread(*this, threadCanCallJava); 211 } 212 213 mStatus = NO_ERROR; 214 215 mFormat = format; 216 // Update buffer size in case it has been limited by AudioFlinger during track creation 217 mFrameCount = mCblk->frameCount; 218 mChannelCount = (uint8_t)channelCount; 219 mChannelMask = channelMask; 220 mActive = 0; 221 mCbf = cbf; 222 mNotificationFrames = notificationFrames; 223 mRemainingFrames = notificationFrames; 224 mUserData = user; 225 // TODO: add audio hardware input latency here 226 mLatency = (1000*mFrameCount) / sampleRate; 227 mMarkerPosition = 0; 228 mMarkerReached = false; 229 mNewPosition = 0; 230 mUpdatePeriod = 0; 231 mInputSource = inputSource; 232 mFlags = flags; 233 mInput = input; 234 AudioSystem::acquireAudioSessionId(mSessionId); 235 236 return NO_ERROR; 237} 238 239status_t AudioRecord::initCheck() const 240{ 241 return mStatus; 242} 243 244// ------------------------------------------------------------------------- 245 246uint32_t AudioRecord::latency() const 247{ 248 return mLatency; 249} 250 251audio_format_t AudioRecord::format() const 252{ 253 return mFormat; 254} 255 256int AudioRecord::channelCount() const 257{ 258 return mChannelCount; 259} 260 261uint32_t AudioRecord::frameCount() const 262{ 263 return mFrameCount; 264} 265 266size_t AudioRecord::frameSize() const 267{ 268 if (audio_is_linear_pcm(mFormat)) { 269 return channelCount()*audio_bytes_per_sample(mFormat); 270 } else { 271 return sizeof(uint8_t); 272 } 273} 274 275audio_source_t AudioRecord::inputSource() const 276{ 277 return mInputSource; 278} 279 280// ------------------------------------------------------------------------- 281 282status_t AudioRecord::start(AudioSystem::sync_event_t event, int triggerSession) 283{ 284 status_t ret = NO_ERROR; 285 sp<ClientRecordThread> t = mClientRecordThread; 286 287 ALOGV("start, sync event %d trigger session %d", event, triggerSession); 288 289 if (t != 0) { 290 if (t->exitPending()) { 291 if (t->requestExitAndWait() == WOULD_BLOCK) { 292 ALOGE("AudioRecord::start called from thread"); 293 return WOULD_BLOCK; 294 } 295 } 296 } 297 298 AutoMutex lock(mLock); 299 // acquire a strong reference on the IAudioRecord and IMemory so that they cannot be destroyed 300 // while we are accessing the cblk 301 sp<IAudioRecord> audioRecord = mAudioRecord; 302 sp<IMemory> iMem = mCblkMemory; 303 audio_track_cblk_t* cblk = mCblk; 304 if (mActive == 0) { 305 mActive = 1; 306 307 pid_t tid; 308 if (t != 0) { 309 mReadyToRun = WOULD_BLOCK; 310 t->run("AudioRecord", ANDROID_PRIORITY_AUDIO); 311 tid = t->getTid(); // pid_t is unknown until run() 312 ALOGV("getTid=%d", tid); 313 if (tid == -1) { 314 tid = 0; 315 } 316 // thread blocks in readyToRun() 317 } else { 318 tid = 0; // not gettid() 319 } 320 321 cblk->lock.lock(); 322 if (!(cblk->flags & CBLK_INVALID_MSK)) { 323 cblk->lock.unlock(); 324 ALOGV("mAudioRecord->start(tid=%d)", tid); 325 ret = mAudioRecord->start(tid, event, triggerSession); 326 cblk->lock.lock(); 327 if (ret == DEAD_OBJECT) { 328 android_atomic_or(CBLK_INVALID_ON, &cblk->flags); 329 } 330 } 331 if (cblk->flags & CBLK_INVALID_MSK) { 332 ret = restoreRecord_l(cblk); 333 } 334 cblk->lock.unlock(); 335 if (ret == NO_ERROR) { 336 mNewPosition = cblk->user + mUpdatePeriod; 337 cblk->bufferTimeoutMs = MAX_RUN_TIMEOUT_MS; 338 cblk->waitTimeMs = 0; 339 if (t != 0) { 340 // thread unblocks in readyToRun() and returns NO_ERROR 341 mReadyToRun = NO_ERROR; 342 mCondition.signal(); 343 } else { 344 mPreviousPriority = getpriority(PRIO_PROCESS, 0); 345 mPreviousSchedulingGroup = androidGetThreadSchedulingGroup(0); 346 androidSetThreadPriority(0, ANDROID_PRIORITY_AUDIO); 347 } 348 } else { 349 mActive = 0; 350 // thread unblocks in readyToRun() and returns NO_INIT 351 mReadyToRun = NO_INIT; 352 mCondition.signal(); 353 } 354 } 355 356 return ret; 357} 358 359status_t AudioRecord::stop() 360{ 361 sp<ClientRecordThread> t = mClientRecordThread; 362 363 ALOGV("stop"); 364 365 AutoMutex lock(mLock); 366 if (mActive == 1) { 367 mActive = 0; 368 mCblk->cv.signal(); 369 mAudioRecord->stop(); 370 // the record head position will reset to 0, so if a marker is set, we need 371 // to activate it again 372 mMarkerReached = false; 373 if (t != 0) { 374 t->requestExit(); 375 } else { 376 setpriority(PRIO_PROCESS, 0, mPreviousPriority); 377 androidSetThreadSchedulingGroup(0, mPreviousSchedulingGroup); 378 } 379 } 380 381 return NO_ERROR; 382} 383 384bool AudioRecord::stopped() const 385{ 386 return !mActive; 387} 388 389uint32_t AudioRecord::getSampleRate() const 390{ 391 AutoMutex lock(mLock); 392 return mCblk->sampleRate; 393} 394 395status_t AudioRecord::setMarkerPosition(uint32_t marker) 396{ 397 if (mCbf == NULL) return INVALID_OPERATION; 398 399 mMarkerPosition = marker; 400 mMarkerReached = false; 401 402 return NO_ERROR; 403} 404 405status_t AudioRecord::getMarkerPosition(uint32_t *marker) const 406{ 407 if (marker == NULL) return BAD_VALUE; 408 409 *marker = mMarkerPosition; 410 411 return NO_ERROR; 412} 413 414status_t AudioRecord::setPositionUpdatePeriod(uint32_t updatePeriod) 415{ 416 if (mCbf == NULL) return INVALID_OPERATION; 417 418 uint32_t curPosition; 419 getPosition(&curPosition); 420 mNewPosition = curPosition + updatePeriod; 421 mUpdatePeriod = updatePeriod; 422 423 return NO_ERROR; 424} 425 426status_t AudioRecord::getPositionUpdatePeriod(uint32_t *updatePeriod) const 427{ 428 if (updatePeriod == NULL) return BAD_VALUE; 429 430 *updatePeriod = mUpdatePeriod; 431 432 return NO_ERROR; 433} 434 435status_t AudioRecord::getPosition(uint32_t *position) const 436{ 437 if (position == NULL) return BAD_VALUE; 438 439 AutoMutex lock(mLock); 440 *position = mCblk->user; 441 442 return NO_ERROR; 443} 444 445unsigned int AudioRecord::getInputFramesLost() const 446{ 447 if (mActive) 448 return AudioSystem::getInputFramesLost(mInput); 449 else 450 return 0; 451} 452 453// ------------------------------------------------------------------------- 454 455// must be called with mLock held 456status_t AudioRecord::openRecord_l( 457 uint32_t sampleRate, 458 audio_format_t format, 459 uint32_t channelMask, 460 int frameCount, 461 audio_io_handle_t input) 462{ 463 status_t status; 464 const sp<IAudioFlinger>& audioFlinger = AudioSystem::get_audio_flinger(); 465 if (audioFlinger == 0) { 466 return NO_INIT; 467 } 468 469 sp<IAudioRecord> record = audioFlinger->openRecord(getpid(), input, 470 sampleRate, format, 471 channelMask, 472 frameCount, 473 IAudioFlinger::TRACK_DEFAULT, 474 &mSessionId, 475 &status); 476 477 if (record == 0) { 478 ALOGE("AudioFlinger could not create record track, status: %d", status); 479 return status; 480 } 481 sp<IMemory> cblk = record->getCblk(); 482 if (cblk == 0) { 483 ALOGE("Could not get control block"); 484 return NO_INIT; 485 } 486 mAudioRecord.clear(); 487 mAudioRecord = record; 488 mCblkMemory.clear(); 489 mCblkMemory = cblk; 490 mCblk = static_cast<audio_track_cblk_t*>(cblk->pointer()); 491 mCblk->buffers = (char*)mCblk + sizeof(audio_track_cblk_t); 492 android_atomic_and(~CBLK_DIRECTION_MSK, &mCblk->flags); 493 mCblk->bufferTimeoutMs = MAX_RUN_TIMEOUT_MS; 494 mCblk->waitTimeMs = 0; 495 return NO_ERROR; 496} 497 498status_t AudioRecord::obtainBuffer(Buffer* audioBuffer, int32_t waitCount) 499{ 500 AutoMutex lock(mLock); 501 int active; 502 status_t result = NO_ERROR; 503 audio_track_cblk_t* cblk = mCblk; 504 uint32_t framesReq = audioBuffer->frameCount; 505 uint32_t waitTimeMs = (waitCount < 0) ? cblk->bufferTimeoutMs : WAIT_PERIOD_MS; 506 507 audioBuffer->frameCount = 0; 508 audioBuffer->size = 0; 509 510 uint32_t framesReady = cblk->framesReady(); 511 512 if (framesReady == 0) { 513 cblk->lock.lock(); 514 goto start_loop_here; 515 while (framesReady == 0) { 516 active = mActive; 517 if (CC_UNLIKELY(!active)) { 518 cblk->lock.unlock(); 519 return NO_MORE_BUFFERS; 520 } 521 if (CC_UNLIKELY(!waitCount)) { 522 cblk->lock.unlock(); 523 return WOULD_BLOCK; 524 } 525 if (!(cblk->flags & CBLK_INVALID_MSK)) { 526 mLock.unlock(); 527 result = cblk->cv.waitRelative(cblk->lock, milliseconds(waitTimeMs)); 528 cblk->lock.unlock(); 529 mLock.lock(); 530 if (mActive == 0) { 531 return status_t(STOPPED); 532 } 533 cblk->lock.lock(); 534 } 535 if (cblk->flags & CBLK_INVALID_MSK) { 536 goto create_new_record; 537 } 538 if (CC_UNLIKELY(result != NO_ERROR)) { 539 cblk->waitTimeMs += waitTimeMs; 540 if (cblk->waitTimeMs >= cblk->bufferTimeoutMs) { 541 ALOGW( "obtainBuffer timed out (is the CPU pegged?) " 542 "user=%08x, server=%08x", cblk->user, cblk->server); 543 cblk->lock.unlock(); 544 // callback thread or sync event hasn't changed 545 result = mAudioRecord->start(0, AudioSystem::SYNC_EVENT_SAME, 0); 546 cblk->lock.lock(); 547 if (result == DEAD_OBJECT) { 548 android_atomic_or(CBLK_INVALID_ON, &cblk->flags); 549create_new_record: 550 result = AudioRecord::restoreRecord_l(cblk); 551 } 552 if (result != NO_ERROR) { 553 ALOGW("obtainBuffer create Track error %d", result); 554 cblk->lock.unlock(); 555 return result; 556 } 557 cblk->waitTimeMs = 0; 558 } 559 if (--waitCount == 0) { 560 cblk->lock.unlock(); 561 return TIMED_OUT; 562 } 563 } 564 // read the server count again 565 start_loop_here: 566 framesReady = cblk->framesReady(); 567 } 568 cblk->lock.unlock(); 569 } 570 571 cblk->waitTimeMs = 0; 572 573 if (framesReq > framesReady) { 574 framesReq = framesReady; 575 } 576 577 uint32_t u = cblk->user; 578 uint32_t bufferEnd = cblk->userBase + cblk->frameCount; 579 580 if (u + framesReq > bufferEnd) { 581 framesReq = bufferEnd - u; 582 } 583 584 audioBuffer->flags = 0; 585 audioBuffer->channelCount= mChannelCount; 586 audioBuffer->format = mFormat; 587 audioBuffer->frameCount = framesReq; 588 audioBuffer->size = framesReq*cblk->frameSize; 589 audioBuffer->raw = (int8_t*)cblk->buffer(u); 590 active = mActive; 591 return active ? status_t(NO_ERROR) : status_t(STOPPED); 592} 593 594void AudioRecord::releaseBuffer(Buffer* audioBuffer) 595{ 596 AutoMutex lock(mLock); 597 mCblk->stepUser(audioBuffer->frameCount); 598} 599 600audio_io_handle_t AudioRecord::getInput() const 601{ 602 AutoMutex lock(mLock); 603 return mInput; 604} 605 606// must be called with mLock held 607audio_io_handle_t AudioRecord::getInput_l() 608{ 609 mInput = AudioSystem::getInput(mInputSource, 610 mCblk->sampleRate, 611 mFormat, 612 mChannelMask, 613 (audio_in_acoustics_t)mFlags, 614 mSessionId); 615 return mInput; 616} 617 618int AudioRecord::getSessionId() const 619{ 620 return mSessionId; 621} 622 623// ------------------------------------------------------------------------- 624 625ssize_t AudioRecord::read(void* buffer, size_t userSize) 626{ 627 ssize_t read = 0; 628 Buffer audioBuffer; 629 int8_t *dst = static_cast<int8_t*>(buffer); 630 631 if (ssize_t(userSize) < 0) { 632 // sanity-check. user is most-likely passing an error code. 633 ALOGE("AudioRecord::read(buffer=%p, size=%u (%d)", 634 buffer, userSize, userSize); 635 return BAD_VALUE; 636 } 637 638 mLock.lock(); 639 // acquire a strong reference on the IAudioRecord and IMemory so that they cannot be destroyed 640 // while we are accessing the cblk 641 sp<IAudioRecord> audioRecord = mAudioRecord; 642 sp<IMemory> iMem = mCblkMemory; 643 mLock.unlock(); 644 645 do { 646 647 audioBuffer.frameCount = userSize/frameSize(); 648 649 // By using a wait count corresponding to twice the timeout period in 650 // obtainBuffer() we give a chance to recover once for a read timeout 651 // (if media_server crashed for instance) before returning a length of 652 // 0 bytes read to the client 653 status_t err = obtainBuffer(&audioBuffer, ((2 * MAX_RUN_TIMEOUT_MS) / WAIT_PERIOD_MS)); 654 if (err < 0) { 655 // out of buffers, return #bytes written 656 if (err == status_t(NO_MORE_BUFFERS)) 657 break; 658 if (err == status_t(TIMED_OUT)) 659 err = 0; 660 return ssize_t(err); 661 } 662 663 size_t bytesRead = audioBuffer.size; 664 memcpy(dst, audioBuffer.i8, bytesRead); 665 666 dst += bytesRead; 667 userSize -= bytesRead; 668 read += bytesRead; 669 670 releaseBuffer(&audioBuffer); 671 } while (userSize); 672 673 return read; 674} 675 676// ------------------------------------------------------------------------- 677 678bool AudioRecord::processAudioBuffer(const sp<ClientRecordThread>& thread) 679{ 680 Buffer audioBuffer; 681 uint32_t frames = mRemainingFrames; 682 size_t readSize; 683 684 mLock.lock(); 685 // acquire a strong reference on the IAudioRecord and IMemory so that they cannot be destroyed 686 // while we are accessing the cblk 687 sp<IAudioRecord> audioRecord = mAudioRecord; 688 sp<IMemory> iMem = mCblkMemory; 689 audio_track_cblk_t* cblk = mCblk; 690 mLock.unlock(); 691 692 // Manage marker callback 693 if (!mMarkerReached && (mMarkerPosition > 0)) { 694 if (cblk->user >= mMarkerPosition) { 695 mCbf(EVENT_MARKER, mUserData, (void *)&mMarkerPosition); 696 mMarkerReached = true; 697 } 698 } 699 700 // Manage new position callback 701 if (mUpdatePeriod > 0) { 702 while (cblk->user >= mNewPosition) { 703 mCbf(EVENT_NEW_POS, mUserData, (void *)&mNewPosition); 704 mNewPosition += mUpdatePeriod; 705 } 706 } 707 708 do { 709 audioBuffer.frameCount = frames; 710 // Calling obtainBuffer() with a wait count of 1 711 // limits wait time to WAIT_PERIOD_MS. This prevents from being 712 // stuck here not being able to handle timed events (position, markers). 713 status_t err = obtainBuffer(&audioBuffer, 1); 714 if (err < NO_ERROR) { 715 if (err != TIMED_OUT) { 716 ALOGE_IF(err != status_t(NO_MORE_BUFFERS), "Error obtaining an audio buffer, giving up."); 717 return false; 718 } 719 break; 720 } 721 if (err == status_t(STOPPED)) return false; 722 723 size_t reqSize = audioBuffer.size; 724 mCbf(EVENT_MORE_DATA, mUserData, &audioBuffer); 725 readSize = audioBuffer.size; 726 727 // Sanity check on returned size 728 if (ssize_t(readSize) <= 0) { 729 // The callback is done filling buffers 730 // Keep this thread going to handle timed events and 731 // still try to get more data in intervals of WAIT_PERIOD_MS 732 // but don't just loop and block the CPU, so wait 733 usleep(WAIT_PERIOD_MS*1000); 734 break; 735 } 736 if (readSize > reqSize) readSize = reqSize; 737 738 audioBuffer.size = readSize; 739 audioBuffer.frameCount = readSize/frameSize(); 740 frames -= audioBuffer.frameCount; 741 742 releaseBuffer(&audioBuffer); 743 744 } while (frames); 745 746 747 // Manage overrun callback 748 if (mActive && (cblk->framesAvailable() == 0)) { 749 ALOGV("Overrun user: %x, server: %x, flags %04x", cblk->user, cblk->server, cblk->flags); 750 if (!(android_atomic_or(CBLK_UNDERRUN_ON, &cblk->flags) & CBLK_UNDERRUN_MSK)) { 751 mCbf(EVENT_OVERRUN, mUserData, 0); 752 } 753 } 754 755 if (frames == 0) { 756 mRemainingFrames = mNotificationFrames; 757 } else { 758 mRemainingFrames = frames; 759 } 760 return true; 761} 762 763// must be called with mLock and cblk.lock held. Callers must also hold strong references on 764// the IAudioRecord and IMemory in case they are recreated here. 765// If the IAudioRecord is successfully restored, the cblk pointer is updated 766status_t AudioRecord::restoreRecord_l(audio_track_cblk_t*& cblk) 767{ 768 status_t result; 769 770 if (!(android_atomic_or(CBLK_RESTORING_ON, &cblk->flags) & CBLK_RESTORING_MSK)) { 771 ALOGW("dead IAudioRecord, creating a new one"); 772 // signal old cblk condition so that other threads waiting for available buffers stop 773 // waiting now 774 cblk->cv.broadcast(); 775 cblk->lock.unlock(); 776 777 // if the new IAudioRecord is created, openRecord_l() will modify the 778 // following member variables: mAudioRecord, mCblkMemory and mCblk. 779 // It will also delete the strong references on previous IAudioRecord and IMemory 780 result = openRecord_l(cblk->sampleRate, mFormat, mChannelMask, 781 mFrameCount, getInput_l()); 782 if (result == NO_ERROR) { 783 // callback thread or sync event hasn't changed 784 result = mAudioRecord->start(0, AudioSystem::SYNC_EVENT_SAME, 0); 785 } 786 if (result != NO_ERROR) { 787 mActive = false; 788 } 789 790 // signal old cblk condition for other threads waiting for restore completion 791 android_atomic_or(CBLK_RESTORED_ON, &cblk->flags); 792 cblk->cv.broadcast(); 793 } else { 794 if (!(cblk->flags & CBLK_RESTORED_MSK)) { 795 ALOGW("dead IAudioRecord, waiting for a new one to be created"); 796 mLock.unlock(); 797 result = cblk->cv.waitRelative(cblk->lock, milliseconds(RESTORE_TIMEOUT_MS)); 798 cblk->lock.unlock(); 799 mLock.lock(); 800 } else { 801 ALOGW("dead IAudioRecord, already restored"); 802 result = NO_ERROR; 803 cblk->lock.unlock(); 804 } 805 if (result != NO_ERROR || mActive == 0) { 806 result = status_t(STOPPED); 807 } 808 } 809 ALOGV("restoreRecord_l() status %d mActive %d cblk %p, old cblk %p flags %08x old flags %08x", 810 result, mActive, mCblk, cblk, mCblk->flags, cblk->flags); 811 812 if (result == NO_ERROR) { 813 // from now on we switch to the newly created cblk 814 cblk = mCblk; 815 } 816 cblk->lock.lock(); 817 818 ALOGW_IF(result != NO_ERROR, "restoreRecord_l() error %d", result); 819 820 return result; 821} 822 823// ========================================================================= 824 825AudioRecord::ClientRecordThread::ClientRecordThread(AudioRecord& receiver, bool bCanCallJava) 826 : Thread(bCanCallJava), mReceiver(receiver) 827{ 828} 829 830bool AudioRecord::ClientRecordThread::threadLoop() 831{ 832 return mReceiver.processAudioBuffer(this); 833} 834 835status_t AudioRecord::ClientRecordThread::readyToRun() 836{ 837 AutoMutex(mReceiver.mLock); 838 while (mReceiver.mReadyToRun == WOULD_BLOCK) { 839 mReceiver.mCondition.wait(mReceiver.mLock); 840 } 841 return mReceiver.mReadyToRun; 842} 843 844// ------------------------------------------------------------------------- 845 846}; // namespace android 847