MPEG4Writer.cpp revision 432ec3768cc4a3b1b01afedc456689d75c89ee2b
1/* 2 * Copyright (C) 2009 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_NDEBUG 0 18#define LOG_TAG "MPEG4Writer" 19#include <utils/Log.h> 20 21#include <arpa/inet.h> 22 23#include <pthread.h> 24#include <sys/prctl.h> 25#include <sys/resource.h> 26 27#include <media/stagefright/MPEG4Writer.h> 28#include <media/stagefright/MediaBuffer.h> 29#include <media/stagefright/MetaData.h> 30#include <media/stagefright/MediaDebug.h> 31#include <media/stagefright/MediaDefs.h> 32#include <media/stagefright/MediaErrors.h> 33#include <media/stagefright/MediaSource.h> 34#include <media/stagefright/Utils.h> 35#include <media/mediarecorder.h> 36#include <cutils/properties.h> 37#include <sys/types.h> 38#include <sys/stat.h> 39#include <fcntl.h> 40#include <unistd.h> 41 42#include "include/ESDS.h" 43 44namespace android { 45 46static const int64_t kMax32BitFileSize = 0x007fffffffLL; 47static const uint8_t kNalUnitTypeSeqParamSet = 0x07; 48static const uint8_t kNalUnitTypePicParamSet = 0x08; 49static const int64_t kInitialDelayTimeUs = 700000LL; 50 51// Using longer adjustment period to suppress fluctuations in 52// the audio encoding paths 53static const int64_t kVideoMediaTimeAdjustPeriodTimeUs = 600000000LL; // 10 minutes 54 55class MPEG4Writer::Track { 56public: 57 Track(MPEG4Writer *owner, const sp<MediaSource> &source, size_t trackId); 58 59 ~Track(); 60 61 status_t start(MetaData *params); 62 status_t stop(); 63 status_t pause(); 64 bool reachedEOS(); 65 66 int64_t getDurationUs() const; 67 int64_t getEstimatedTrackSizeBytes() const; 68 void writeTrackHeader(bool use32BitOffset = true); 69 void bufferChunk(int64_t timestampUs); 70 bool isAvc() const { return mIsAvc; } 71 bool isAudio() const { return mIsAudio; } 72 bool isMPEG4() const { return mIsMPEG4; } 73 void addChunkOffset(off64_t offset); 74 int32_t getTrackId() const { return mTrackId; } 75 status_t dump(int fd, const Vector<String16>& args) const; 76 77private: 78 MPEG4Writer *mOwner; 79 sp<MetaData> mMeta; 80 sp<MediaSource> mSource; 81 volatile bool mDone; 82 volatile bool mPaused; 83 volatile bool mResumed; 84 volatile bool mStarted; 85 bool mIsAvc; 86 bool mIsAudio; 87 bool mIsMPEG4; 88 int32_t mTrackId; 89 int64_t mTrackDurationUs; 90 int64_t mMaxChunkDurationUs; 91 92 // For realtime applications, we need to adjust the media clock 93 // for video track based on the audio media clock 94 bool mIsRealTimeRecording; 95 int64_t mMaxTimeStampUs; 96 int64_t mEstimatedTrackSizeBytes; 97 int64_t mMdatSizeBytes; 98 int32_t mTimeScale; 99 100 pthread_t mThread; 101 102 // mNumSamples is used to track how many samples in mSampleSizes List. 103 // This is to reduce the cost associated with mSampleSizes.size() call, 104 // since it is O(n). Ideally, the fix should be in List class. 105 size_t mNumSamples; 106 List<size_t> mSampleSizes; 107 bool mSamplesHaveSameSize; 108 109 List<MediaBuffer *> mChunkSamples; 110 111 size_t mNumStcoTableEntries; 112 List<off64_t> mChunkOffsets; 113 114 size_t mNumStscTableEntries; 115 struct StscTableEntry { 116 117 StscTableEntry(uint32_t chunk, uint32_t samples, uint32_t id) 118 : firstChunk(chunk), 119 samplesPerChunk(samples), 120 sampleDescriptionId(id) {} 121 122 uint32_t firstChunk; 123 uint32_t samplesPerChunk; 124 uint32_t sampleDescriptionId; 125 }; 126 List<StscTableEntry> mStscTableEntries; 127 128 size_t mNumStssTableEntries; 129 List<int32_t> mStssTableEntries; 130 131 size_t mNumSttsTableEntries; 132 struct SttsTableEntry { 133 134 SttsTableEntry(uint32_t count, uint32_t durationUs) 135 : sampleCount(count), sampleDurationUs(durationUs) {} 136 137 uint32_t sampleCount; 138 uint32_t sampleDurationUs; 139 }; 140 List<SttsTableEntry> mSttsTableEntries; 141 142 // Sequence parameter set or picture parameter set 143 struct AVCParamSet { 144 AVCParamSet(uint16_t length, const uint8_t *data) 145 : mLength(length), mData(data) {} 146 147 uint16_t mLength; 148 const uint8_t *mData; 149 }; 150 List<AVCParamSet> mSeqParamSets; 151 List<AVCParamSet> mPicParamSets; 152 uint8_t mProfileIdc; 153 uint8_t mProfileCompatible; 154 uint8_t mLevelIdc; 155 156 void *mCodecSpecificData; 157 size_t mCodecSpecificDataSize; 158 bool mGotAllCodecSpecificData; 159 bool mTrackingProgressStatus; 160 161 bool mReachedEOS; 162 int64_t mStartTimestampUs; 163 int64_t mStartTimeRealUs; 164 int64_t mFirstSampleTimeRealUs; 165 int64_t mPreviousTrackTimeUs; 166 int64_t mTrackEveryTimeDurationUs; 167 168 // Has the media time adjustment for video started? 169 bool mIsMediaTimeAdjustmentOn; 170 // The time stamp when previous media time adjustment period starts 171 int64_t mPrevMediaTimeAdjustTimestampUs; 172 // Number of vidoe frames whose time stamp may be adjusted 173 int64_t mMediaTimeAdjustNumFrames; 174 // The sample number when previous meida time adjustmnet period starts 175 int64_t mPrevMediaTimeAdjustSample; 176 // The total accumulated drift time within a period of 177 // kVideoMediaTimeAdjustPeriodTimeUs. 178 int64_t mTotalDriftTimeToAdjustUs; 179 // The total accumalated drift time since the start of the recording 180 // excluding the current time adjustment period 181 int64_t mPrevTotalAccumDriftTimeUs; 182 183 // Update the audio track's drift information. 184 void updateDriftTime(const sp<MetaData>& meta); 185 186 // Adjust the time stamp of the video track according to 187 // the drift time information from the audio track. 188 void adjustMediaTime(int64_t *timestampUs); 189 190 static void *ThreadWrapper(void *me); 191 status_t threadEntry(); 192 193 const uint8_t *parseParamSet( 194 const uint8_t *data, size_t length, int type, size_t *paramSetLen); 195 196 status_t makeAVCCodecSpecificData(const uint8_t *data, size_t size); 197 status_t copyAVCCodecSpecificData(const uint8_t *data, size_t size); 198 status_t parseAVCCodecSpecificData(const uint8_t *data, size_t size); 199 200 // Track authoring progress status 201 void trackProgressStatus(int64_t timeUs, status_t err = OK); 202 void initTrackingProgressStatus(MetaData *params); 203 204 void getCodecSpecificDataFromInputFormatIfPossible(); 205 206 // Determine the track time scale 207 // If it is an audio track, try to use the sampling rate as 208 // the time scale; however, if user chooses the overwrite 209 // value, the user-supplied time scale will be used. 210 void setTimeScale(); 211 212 // Simple validation on the codec specific data 213 status_t checkCodecSpecificData() const; 214 int32_t mRotation; 215 216 void updateTrackSizeEstimate(); 217 void addOneStscTableEntry(size_t chunkId, size_t sampleId); 218 void addOneStssTableEntry(size_t sampleId); 219 void addOneSttsTableEntry(size_t sampleCount, int64_t durationUs); 220 void sendTrackSummary(bool hasMultipleTracks); 221 222 // Write the boxes 223 void writeStcoBox(bool use32BitOffset); 224 void writeStscBox(); 225 void writeStszBox(); 226 void writeStssBox(); 227 void writeSttsBox(); 228 void writeD263Box(); 229 void writePaspBox(); 230 void writeAvccBox(); 231 void writeUrlBox(); 232 void writeDrefBox(); 233 void writeDinfBox(); 234 void writeDamrBox(); 235 void writeMdhdBox(time_t now); 236 void writeSmhdBox(); 237 void writeVmhdBox(); 238 void writeHdlrBox(); 239 void writeTkhdBox(time_t now); 240 void writeMp4aEsdsBox(); 241 void writeMp4vEsdsBox(); 242 void writeAudioFourCCBox(); 243 void writeVideoFourCCBox(); 244 void writeStblBox(bool use32BitOffset); 245 246 Track(const Track &); 247 Track &operator=(const Track &); 248}; 249 250MPEG4Writer::MPEG4Writer(const char *filename) 251 : mFd(-1), 252 mInitCheck(NO_INIT), 253 mUse4ByteNalLength(true), 254 mUse32BitOffset(true), 255 mIsFileSizeLimitExplicitlyRequested(false), 256 mPaused(false), 257 mStarted(false), 258 mOffset(0), 259 mMdatOffset(0), 260 mEstimatedMoovBoxSize(0), 261 mInterleaveDurationUs(1000000), 262 mLatitudex10000(0), 263 mLongitudex10000(0), 264 mAreGeoTagsAvailable(false), 265 mStartTimeOffsetMs(-1) { 266 267 mFd = open(filename, O_CREAT | O_LARGEFILE | O_TRUNC | O_RDWR); 268 if (mFd >= 0) { 269 mInitCheck = OK; 270 } 271} 272 273MPEG4Writer::MPEG4Writer(int fd) 274 : mFd(dup(fd)), 275 mInitCheck(mFd < 0? NO_INIT: OK), 276 mUse4ByteNalLength(true), 277 mUse32BitOffset(true), 278 mIsFileSizeLimitExplicitlyRequested(false), 279 mPaused(false), 280 mStarted(false), 281 mOffset(0), 282 mMdatOffset(0), 283 mEstimatedMoovBoxSize(0), 284 mInterleaveDurationUs(1000000), 285 mLatitudex10000(0), 286 mLongitudex10000(0), 287 mAreGeoTagsAvailable(false), 288 mStartTimeOffsetMs(-1) { 289} 290 291MPEG4Writer::~MPEG4Writer() { 292 stop(); 293 294 while (!mTracks.empty()) { 295 List<Track *>::iterator it = mTracks.begin(); 296 delete *it; 297 (*it) = NULL; 298 mTracks.erase(it); 299 } 300 mTracks.clear(); 301} 302 303status_t MPEG4Writer::dump( 304 int fd, const Vector<String16>& args) { 305 const size_t SIZE = 256; 306 char buffer[SIZE]; 307 String8 result; 308 snprintf(buffer, SIZE, " MPEG4Writer %p\n", this); 309 result.append(buffer); 310 snprintf(buffer, SIZE, " mStarted: %s\n", mStarted? "true": "false"); 311 result.append(buffer); 312 ::write(fd, result.string(), result.size()); 313 for (List<Track *>::iterator it = mTracks.begin(); 314 it != mTracks.end(); ++it) { 315 (*it)->dump(fd, args); 316 } 317 return OK; 318} 319 320status_t MPEG4Writer::Track::dump( 321 int fd, const Vector<String16>& args) const { 322 const size_t SIZE = 256; 323 char buffer[SIZE]; 324 String8 result; 325 snprintf(buffer, SIZE, " %s track\n", mIsAudio? "Audio": "Video"); 326 result.append(buffer); 327 snprintf(buffer, SIZE, " reached EOS: %s\n", 328 mReachedEOS? "true": "false"); 329 result.append(buffer); 330 ::write(fd, result.string(), result.size()); 331 return OK; 332} 333 334status_t MPEG4Writer::addSource(const sp<MediaSource> &source) { 335 Mutex::Autolock l(mLock); 336 if (mStarted) { 337 LOGE("Attempt to add source AFTER recording is started"); 338 return UNKNOWN_ERROR; 339 } 340 Track *track = new Track(this, source, mTracks.size()); 341 mTracks.push_back(track); 342 343 return OK; 344} 345 346status_t MPEG4Writer::startTracks(MetaData *params) { 347 for (List<Track *>::iterator it = mTracks.begin(); 348 it != mTracks.end(); ++it) { 349 status_t err = (*it)->start(params); 350 351 if (err != OK) { 352 for (List<Track *>::iterator it2 = mTracks.begin(); 353 it2 != it; ++it2) { 354 (*it2)->stop(); 355 } 356 357 return err; 358 } 359 } 360 return OK; 361} 362 363int64_t MPEG4Writer::estimateMoovBoxSize(int32_t bitRate) { 364 // This implementation is highly experimental/heurisitic. 365 // 366 // Statistical analysis shows that metadata usually accounts 367 // for a small portion of the total file size, usually < 0.6%. 368 369 // The default MIN_MOOV_BOX_SIZE is set to 0.6% x 1MB / 2, 370 // where 1MB is the common file size limit for MMS application. 371 // The default MAX _MOOV_BOX_SIZE value is based on about 3 372 // minute video recording with a bit rate about 3 Mbps, because 373 // statistics also show that most of the video captured are going 374 // to be less than 3 minutes. 375 376 // If the estimation is wrong, we will pay the price of wasting 377 // some reserved space. This should not happen so often statistically. 378 static const int32_t factor = mUse32BitOffset? 1: 2; 379 static const int64_t MIN_MOOV_BOX_SIZE = 3 * 1024; // 3 KB 380 static const int64_t MAX_MOOV_BOX_SIZE = (180 * 3000000 * 6LL / 8000); 381 int64_t size = MIN_MOOV_BOX_SIZE; 382 383 // Max file size limit is set 384 if (mMaxFileSizeLimitBytes != 0 && mIsFileSizeLimitExplicitlyRequested) { 385 size = mMaxFileSizeLimitBytes * 6 / 1000; 386 } 387 388 // Max file duration limit is set 389 if (mMaxFileDurationLimitUs != 0) { 390 if (bitRate > 0) { 391 int64_t size2 = 392 ((mMaxFileDurationLimitUs * bitRate * 6) / 1000 / 8000000); 393 if (mMaxFileSizeLimitBytes != 0 && mIsFileSizeLimitExplicitlyRequested) { 394 // When both file size and duration limits are set, 395 // we use the smaller limit of the two. 396 if (size > size2) { 397 size = size2; 398 } 399 } else { 400 // Only max file duration limit is set 401 size = size2; 402 } 403 } 404 } 405 406 if (size < MIN_MOOV_BOX_SIZE) { 407 size = MIN_MOOV_BOX_SIZE; 408 } 409 410 // Any long duration recording will be probably end up with 411 // non-streamable mp4 file. 412 if (size > MAX_MOOV_BOX_SIZE) { 413 size = MAX_MOOV_BOX_SIZE; 414 } 415 416 LOGI("limits: %lld/%lld bytes/us, bit rate: %d bps and the estimated" 417 " moov size %lld bytes", 418 mMaxFileSizeLimitBytes, mMaxFileDurationLimitUs, bitRate, size); 419 return factor * size; 420} 421 422status_t MPEG4Writer::start(MetaData *param) { 423 if (mInitCheck != OK) { 424 return UNKNOWN_ERROR; 425 } 426 427 /* 428 * Check mMaxFileSizeLimitBytes at the beginning 429 * since mMaxFileSizeLimitBytes may be implicitly 430 * changed later for 32-bit file offset even if 431 * user does not ask to set it explicitly. 432 */ 433 if (mMaxFileSizeLimitBytes != 0) { 434 mIsFileSizeLimitExplicitlyRequested = true; 435 } 436 437 int32_t use64BitOffset; 438 if (param && 439 param->findInt32(kKey64BitFileOffset, &use64BitOffset) && 440 use64BitOffset) { 441 mUse32BitOffset = false; 442 } 443 444 if (mUse32BitOffset) { 445 // Implicit 32 bit file size limit 446 if (mMaxFileSizeLimitBytes == 0) { 447 mMaxFileSizeLimitBytes = kMax32BitFileSize; 448 } 449 450 // If file size is set to be larger than the 32 bit file 451 // size limit, treat it as an error. 452 if (mMaxFileSizeLimitBytes > kMax32BitFileSize) { 453 LOGW("32-bit file size limit (%lld bytes) too big. " 454 "It is changed to %lld bytes", 455 mMaxFileSizeLimitBytes, kMax32BitFileSize); 456 mMaxFileSizeLimitBytes = kMax32BitFileSize; 457 } 458 } 459 460 int32_t use2ByteNalLength; 461 if (param && 462 param->findInt32(kKey2ByteNalLength, &use2ByteNalLength) && 463 use2ByteNalLength) { 464 mUse4ByteNalLength = false; 465 } 466 467 mStartTimestampUs = -1; 468 469 if (mStarted) { 470 if (mPaused) { 471 mPaused = false; 472 return startTracks(param); 473 } 474 return OK; 475 } 476 477 if (!param || 478 !param->findInt32(kKeyTimeScale, &mTimeScale)) { 479 mTimeScale = 1000; 480 } 481 CHECK(mTimeScale > 0); 482 LOGV("movie time scale: %d", mTimeScale); 483 484 mStreamableFile = true; 485 mWriteMoovBoxToMemory = false; 486 mMoovBoxBuffer = NULL; 487 mMoovBoxBufferOffset = 0; 488 489 writeFtypBox(param); 490 491 mFreeBoxOffset = mOffset; 492 493 if (mEstimatedMoovBoxSize == 0) { 494 int32_t bitRate = -1; 495 if (param) { 496 param->findInt32(kKeyBitRate, &bitRate); 497 } 498 mEstimatedMoovBoxSize = estimateMoovBoxSize(bitRate); 499 } 500 CHECK(mEstimatedMoovBoxSize >= 8); 501 lseek64(mFd, mFreeBoxOffset, SEEK_SET); 502 writeInt32(mEstimatedMoovBoxSize); 503 write("free", 4); 504 505 mMdatOffset = mFreeBoxOffset + mEstimatedMoovBoxSize; 506 mOffset = mMdatOffset; 507 lseek64(mFd, mMdatOffset, SEEK_SET); 508 if (mUse32BitOffset) { 509 write("????mdat", 8); 510 } else { 511 write("\x00\x00\x00\x01mdat????????", 16); 512 } 513 514 status_t err = startWriterThread(); 515 if (err != OK) { 516 return err; 517 } 518 519 err = startTracks(param); 520 if (err != OK) { 521 return err; 522 } 523 524 mStarted = true; 525 return OK; 526} 527 528bool MPEG4Writer::use32BitFileOffset() const { 529 return mUse32BitOffset; 530} 531 532status_t MPEG4Writer::pause() { 533 if (mInitCheck != OK) { 534 return OK; 535 } 536 mPaused = true; 537 status_t err = OK; 538 for (List<Track *>::iterator it = mTracks.begin(); 539 it != mTracks.end(); ++it) { 540 status_t status = (*it)->pause(); 541 if (status != OK) { 542 err = status; 543 } 544 } 545 return err; 546} 547 548void MPEG4Writer::stopWriterThread() { 549 LOGD("Stopping writer thread"); 550 551 { 552 Mutex::Autolock autolock(mLock); 553 554 mDone = true; 555 mChunkReadyCondition.signal(); 556 } 557 558 void *dummy; 559 pthread_join(mThread, &dummy); 560 LOGD("Writer thread stopped"); 561} 562 563/* 564 * MP4 file standard defines a composition matrix: 565 * | a b u | 566 * | c d v | 567 * | x y w | 568 * 569 * the element in the matrix is stored in the following 570 * order: {a, b, u, c, d, v, x, y, w}, 571 * where a, b, c, d, x, and y is in 16.16 format, while 572 * u, v and w is in 2.30 format. 573 */ 574void MPEG4Writer::writeCompositionMatrix(int degrees) { 575 LOGV("writeCompositionMatrix"); 576 uint32_t a = 0x00010000; 577 uint32_t b = 0; 578 uint32_t c = 0; 579 uint32_t d = 0x00010000; 580 switch (degrees) { 581 case 0: 582 break; 583 case 90: 584 a = 0; 585 b = 0x00010000; 586 c = 0xFFFF0000; 587 d = 0; 588 break; 589 case 180: 590 a = 0xFFFF0000; 591 d = 0xFFFF0000; 592 break; 593 case 270: 594 a = 0; 595 b = 0xFFFF0000; 596 c = 0x00010000; 597 d = 0; 598 break; 599 default: 600 CHECK(!"Should never reach this unknown rotation"); 601 break; 602 } 603 604 writeInt32(a); // a 605 writeInt32(b); // b 606 writeInt32(0); // u 607 writeInt32(c); // c 608 writeInt32(d); // d 609 writeInt32(0); // v 610 writeInt32(0); // x 611 writeInt32(0); // y 612 writeInt32(0x40000000); // w 613} 614 615 616status_t MPEG4Writer::stop() { 617 if (mInitCheck != OK) { 618 return OK; 619 } 620 621 status_t err = OK; 622 int64_t maxDurationUs = 0; 623 int64_t minDurationUs = 0x7fffffffffffffffLL; 624 for (List<Track *>::iterator it = mTracks.begin(); 625 it != mTracks.end(); ++it) { 626 status_t status = (*it)->stop(); 627 if (err == OK && status != OK) { 628 err = status; 629 } 630 631 int64_t durationUs = (*it)->getDurationUs(); 632 if (durationUs > maxDurationUs) { 633 maxDurationUs = durationUs; 634 } 635 if (durationUs < minDurationUs) { 636 minDurationUs = durationUs; 637 } 638 } 639 640 if (mTracks.size() > 1) { 641 LOGD("Duration from tracks range is [%lld, %lld] us", 642 minDurationUs, maxDurationUs); 643 } 644 645 stopWriterThread(); 646 647 // Do not write out movie header on error. 648 if (err != OK) { 649 close(mFd); 650 mFd = -1; 651 mInitCheck = NO_INIT; 652 mStarted = false; 653 return err; 654 } 655 656 // Fix up the size of the 'mdat' chunk. 657 if (mUse32BitOffset) { 658 lseek64(mFd, mMdatOffset, SEEK_SET); 659 int32_t size = htonl(static_cast<int32_t>(mOffset - mMdatOffset)); 660 ::write(mFd, &size, 4); 661 } else { 662 lseek64(mFd, mMdatOffset + 8, SEEK_SET); 663 int64_t size = mOffset - mMdatOffset; 664 size = hton64(size); 665 ::write(mFd, &size, 8); 666 } 667 lseek64(mFd, mOffset, SEEK_SET); 668 669 const off64_t moovOffset = mOffset; 670 mWriteMoovBoxToMemory = true; 671 mMoovBoxBuffer = (uint8_t *) malloc(mEstimatedMoovBoxSize); 672 mMoovBoxBufferOffset = 0; 673 CHECK(mMoovBoxBuffer != NULL); 674 writeMoovBox(maxDurationUs); 675 676 mWriteMoovBoxToMemory = false; 677 if (mStreamableFile) { 678 CHECK(mMoovBoxBufferOffset + 8 <= mEstimatedMoovBoxSize); 679 680 // Moov box 681 lseek64(mFd, mFreeBoxOffset, SEEK_SET); 682 mOffset = mFreeBoxOffset; 683 write(mMoovBoxBuffer, 1, mMoovBoxBufferOffset); 684 685 // Free box 686 lseek64(mFd, mOffset, SEEK_SET); 687 writeInt32(mEstimatedMoovBoxSize - mMoovBoxBufferOffset); 688 write("free", 4); 689 690 // Free temp memory 691 free(mMoovBoxBuffer); 692 mMoovBoxBuffer = NULL; 693 mMoovBoxBufferOffset = 0; 694 } else { 695 LOGI("The mp4 file will not be streamable."); 696 } 697 698 CHECK(mBoxes.empty()); 699 700 close(mFd); 701 mFd = -1; 702 mInitCheck = NO_INIT; 703 mStarted = false; 704 705 return err; 706} 707 708void MPEG4Writer::writeMvhdBox(int64_t durationUs) { 709 time_t now = time(NULL); 710 beginBox("mvhd"); 711 writeInt32(0); // version=0, flags=0 712 writeInt32(now); // creation time 713 writeInt32(now); // modification time 714 writeInt32(mTimeScale); // mvhd timescale 715 int32_t duration = (durationUs * mTimeScale + 5E5) / 1E6; 716 writeInt32(duration); 717 writeInt32(0x10000); // rate: 1.0 718 writeInt16(0x100); // volume 719 writeInt16(0); // reserved 720 writeInt32(0); // reserved 721 writeInt32(0); // reserved 722 writeCompositionMatrix(0); // matrix 723 writeInt32(0); // predefined 724 writeInt32(0); // predefined 725 writeInt32(0); // predefined 726 writeInt32(0); // predefined 727 writeInt32(0); // predefined 728 writeInt32(0); // predefined 729 writeInt32(mTracks.size() + 1); // nextTrackID 730 endBox(); // mvhd 731} 732 733void MPEG4Writer::writeMoovBox(int64_t durationUs) { 734 beginBox("moov"); 735 writeMvhdBox(durationUs); 736 if (mAreGeoTagsAvailable) { 737 writeUdtaBox(); 738 } 739 int32_t id = 1; 740 for (List<Track *>::iterator it = mTracks.begin(); 741 it != mTracks.end(); ++it, ++id) { 742 (*it)->writeTrackHeader(mUse32BitOffset); 743 } 744 endBox(); // moov 745} 746 747void MPEG4Writer::writeFtypBox(MetaData *param) { 748 beginBox("ftyp"); 749 750 int32_t fileType; 751 if (param && param->findInt32(kKeyFileType, &fileType) && 752 fileType != OUTPUT_FORMAT_MPEG_4) { 753 writeFourcc("3gp4"); 754 } else { 755 writeFourcc("isom"); 756 } 757 758 writeInt32(0); 759 writeFourcc("isom"); 760 writeFourcc("3gp4"); 761 endBox(); 762} 763 764static bool isTestModeEnabled() { 765#if (PROPERTY_VALUE_MAX < 5) 766#error "PROPERTY_VALUE_MAX must be at least 5" 767#endif 768 769 // Test mode is enabled only if rw.media.record.test system 770 // property is enabled. 771 char value[PROPERTY_VALUE_MAX]; 772 if (property_get("rw.media.record.test", value, NULL) && 773 (!strcasecmp(value, "true") || !strcasecmp(value, "1"))) { 774 return true; 775 } 776 return false; 777} 778 779void MPEG4Writer::sendSessionSummary() { 780 // Send session summary only if test mode is enabled 781 if (!isTestModeEnabled()) { 782 return; 783 } 784 785 for (List<ChunkInfo>::iterator it = mChunkInfos.begin(); 786 it != mChunkInfos.end(); ++it) { 787 int trackNum = it->mTrack->getTrackId() << 28; 788 notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 789 trackNum | MEDIA_RECORDER_TRACK_INTER_CHUNK_TIME_MS, 790 it->mMaxInterChunkDurUs); 791 } 792} 793 794status_t MPEG4Writer::setInterleaveDuration(uint32_t durationUs) { 795 mInterleaveDurationUs = durationUs; 796 return OK; 797} 798 799void MPEG4Writer::lock() { 800 mLock.lock(); 801} 802 803void MPEG4Writer::unlock() { 804 mLock.unlock(); 805} 806 807off64_t MPEG4Writer::addSample_l(MediaBuffer *buffer) { 808 off64_t old_offset = mOffset; 809 810 ::write(mFd, 811 (const uint8_t *)buffer->data() + buffer->range_offset(), 812 buffer->range_length()); 813 814 mOffset += buffer->range_length(); 815 816 return old_offset; 817} 818 819static void StripStartcode(MediaBuffer *buffer) { 820 if (buffer->range_length() < 4) { 821 return; 822 } 823 824 const uint8_t *ptr = 825 (const uint8_t *)buffer->data() + buffer->range_offset(); 826 827 if (!memcmp(ptr, "\x00\x00\x00\x01", 4)) { 828 buffer->set_range( 829 buffer->range_offset() + 4, buffer->range_length() - 4); 830 } 831} 832 833off64_t MPEG4Writer::addLengthPrefixedSample_l(MediaBuffer *buffer) { 834 off64_t old_offset = mOffset; 835 836 size_t length = buffer->range_length(); 837 838 if (mUse4ByteNalLength) { 839 uint8_t x = length >> 24; 840 ::write(mFd, &x, 1); 841 x = (length >> 16) & 0xff; 842 ::write(mFd, &x, 1); 843 x = (length >> 8) & 0xff; 844 ::write(mFd, &x, 1); 845 x = length & 0xff; 846 ::write(mFd, &x, 1); 847 848 ::write(mFd, 849 (const uint8_t *)buffer->data() + buffer->range_offset(), 850 length); 851 852 mOffset += length + 4; 853 } else { 854 CHECK(length < 65536); 855 856 uint8_t x = length >> 8; 857 ::write(mFd, &x, 1); 858 x = length & 0xff; 859 ::write(mFd, &x, 1); 860 ::write(mFd, (const uint8_t *)buffer->data() + buffer->range_offset(), length); 861 mOffset += length + 2; 862 } 863 864 return old_offset; 865} 866 867size_t MPEG4Writer::write( 868 const void *ptr, size_t size, size_t nmemb) { 869 870 const size_t bytes = size * nmemb; 871 if (mWriteMoovBoxToMemory) { 872 // This happens only when we write the moov box at the end of 873 // recording, not for each output video/audio frame we receive. 874 off64_t moovBoxSize = 8 + mMoovBoxBufferOffset + bytes; 875 if (moovBoxSize > mEstimatedMoovBoxSize) { 876 for (List<off64_t>::iterator it = mBoxes.begin(); 877 it != mBoxes.end(); ++it) { 878 (*it) += mOffset; 879 } 880 lseek64(mFd, mOffset, SEEK_SET); 881 ::write(mFd, mMoovBoxBuffer, mMoovBoxBufferOffset); 882 ::write(mFd, ptr, size * nmemb); 883 mOffset += (bytes + mMoovBoxBufferOffset); 884 free(mMoovBoxBuffer); 885 mMoovBoxBuffer = NULL; 886 mMoovBoxBufferOffset = 0; 887 mWriteMoovBoxToMemory = false; 888 mStreamableFile = false; 889 } else { 890 memcpy(mMoovBoxBuffer + mMoovBoxBufferOffset, ptr, bytes); 891 mMoovBoxBufferOffset += bytes; 892 } 893 } else { 894 ::write(mFd, ptr, size * nmemb); 895 mOffset += bytes; 896 } 897 return bytes; 898} 899 900void MPEG4Writer::beginBox(const char *fourcc) { 901 CHECK_EQ(strlen(fourcc), 4); 902 903 mBoxes.push_back(mWriteMoovBoxToMemory? 904 mMoovBoxBufferOffset: mOffset); 905 906 writeInt32(0); 907 writeFourcc(fourcc); 908} 909 910void MPEG4Writer::endBox() { 911 CHECK(!mBoxes.empty()); 912 913 off64_t offset = *--mBoxes.end(); 914 mBoxes.erase(--mBoxes.end()); 915 916 if (mWriteMoovBoxToMemory) { 917 int32_t x = htonl(mMoovBoxBufferOffset - offset); 918 memcpy(mMoovBoxBuffer + offset, &x, 4); 919 } else { 920 lseek64(mFd, offset, SEEK_SET); 921 writeInt32(mOffset - offset); 922 mOffset -= 4; 923 lseek64(mFd, mOffset, SEEK_SET); 924 } 925} 926 927void MPEG4Writer::writeInt8(int8_t x) { 928 write(&x, 1, 1); 929} 930 931void MPEG4Writer::writeInt16(int16_t x) { 932 x = htons(x); 933 write(&x, 1, 2); 934} 935 936void MPEG4Writer::writeInt32(int32_t x) { 937 x = htonl(x); 938 write(&x, 1, 4); 939} 940 941void MPEG4Writer::writeInt64(int64_t x) { 942 x = hton64(x); 943 write(&x, 1, 8); 944} 945 946void MPEG4Writer::writeCString(const char *s) { 947 size_t n = strlen(s); 948 write(s, 1, n + 1); 949} 950 951void MPEG4Writer::writeFourcc(const char *s) { 952 CHECK_EQ(strlen(s), 4); 953 write(s, 1, 4); 954} 955 956 957// Written in +/-DD.DDDD format 958void MPEG4Writer::writeLatitude(int degreex10000) { 959 bool isNegative = (degreex10000 < 0); 960 char sign = isNegative? '-': '+'; 961 962 // Handle the whole part 963 char str[9]; 964 int wholePart = degreex10000 / 10000; 965 if (wholePart == 0) { 966 snprintf(str, 5, "%c%.2d.", sign, wholePart); 967 } else { 968 snprintf(str, 5, "%+.2d.", wholePart); 969 } 970 971 // Handle the fractional part 972 int fractionalPart = degreex10000 - (wholePart * 10000); 973 if (fractionalPart < 0) { 974 fractionalPart = -fractionalPart; 975 } 976 snprintf(&str[4], 5, "%.4d", fractionalPart); 977 978 // Do not write the null terminator 979 write(str, 1, 8); 980} 981 982// Written in +/- DDD.DDDD format 983void MPEG4Writer::writeLongitude(int degreex10000) { 984 bool isNegative = (degreex10000 < 0); 985 char sign = isNegative? '-': '+'; 986 987 // Handle the whole part 988 char str[10]; 989 int wholePart = degreex10000 / 10000; 990 if (wholePart == 0) { 991 snprintf(str, 6, "%c%.3d.", sign, wholePart); 992 } else { 993 snprintf(str, 6, "%+.3d.", wholePart); 994 } 995 996 // Handle the fractional part 997 int fractionalPart = degreex10000 - (wholePart * 10000); 998 if (fractionalPart < 0) { 999 fractionalPart = -fractionalPart; 1000 } 1001 snprintf(&str[5], 5, "%.4d", fractionalPart); 1002 1003 // Do not write the null terminator 1004 write(str, 1, 9); 1005} 1006 1007/* 1008 * Geodata is stored according to ISO-6709 standard. 1009 * latitudex10000 is latitude in degrees times 10000, and 1010 * longitudex10000 is longitude in degrees times 10000. 1011 * The range for the latitude is in [-90, +90], and 1012 * The range for the longitude is in [-180, +180] 1013 */ 1014status_t MPEG4Writer::setGeoData(int latitudex10000, int longitudex10000) { 1015 // Is latitude or longitude out of range? 1016 if (latitudex10000 < -900000 || latitudex10000 > 900000 || 1017 longitudex10000 < -1800000 || longitudex10000 > 1800000) { 1018 return BAD_VALUE; 1019 } 1020 1021 mLatitudex10000 = latitudex10000; 1022 mLongitudex10000 = longitudex10000; 1023 mAreGeoTagsAvailable = true; 1024 return OK; 1025} 1026 1027void MPEG4Writer::write(const void *data, size_t size) { 1028 write(data, 1, size); 1029} 1030 1031bool MPEG4Writer::isFileStreamable() const { 1032 return mStreamableFile; 1033} 1034 1035bool MPEG4Writer::exceedsFileSizeLimit() { 1036 // No limit 1037 if (mMaxFileSizeLimitBytes == 0) { 1038 return false; 1039 } 1040 1041 int64_t nTotalBytesEstimate = static_cast<int64_t>(mEstimatedMoovBoxSize); 1042 for (List<Track *>::iterator it = mTracks.begin(); 1043 it != mTracks.end(); ++it) { 1044 nTotalBytesEstimate += (*it)->getEstimatedTrackSizeBytes(); 1045 } 1046 1047 // Be conservative in the estimate: do not exceed 95% of 1048 // the target file limit. For small target file size limit, though, 1049 // this will not help. 1050 return (nTotalBytesEstimate >= (95 * mMaxFileSizeLimitBytes) / 100); 1051} 1052 1053bool MPEG4Writer::exceedsFileDurationLimit() { 1054 // No limit 1055 if (mMaxFileDurationLimitUs == 0) { 1056 return false; 1057 } 1058 1059 for (List<Track *>::iterator it = mTracks.begin(); 1060 it != mTracks.end(); ++it) { 1061 if ((*it)->getDurationUs() >= mMaxFileDurationLimitUs) { 1062 return true; 1063 } 1064 } 1065 return false; 1066} 1067 1068bool MPEG4Writer::reachedEOS() { 1069 bool allDone = true; 1070 for (List<Track *>::iterator it = mTracks.begin(); 1071 it != mTracks.end(); ++it) { 1072 if (!(*it)->reachedEOS()) { 1073 allDone = false; 1074 break; 1075 } 1076 } 1077 1078 return allDone; 1079} 1080 1081void MPEG4Writer::setStartTimestampUs(int64_t timeUs) { 1082 LOGI("setStartTimestampUs: %lld", timeUs); 1083 CHECK(timeUs >= 0); 1084 Mutex::Autolock autoLock(mLock); 1085 if (mStartTimestampUs < 0 || mStartTimestampUs > timeUs) { 1086 mStartTimestampUs = timeUs; 1087 LOGI("Earliest track starting time: %lld", mStartTimestampUs); 1088 } 1089} 1090 1091int64_t MPEG4Writer::getStartTimestampUs() { 1092 Mutex::Autolock autoLock(mLock); 1093 return mStartTimestampUs; 1094} 1095 1096size_t MPEG4Writer::numTracks() { 1097 Mutex::Autolock autolock(mLock); 1098 return mTracks.size(); 1099} 1100 1101//////////////////////////////////////////////////////////////////////////////// 1102 1103MPEG4Writer::Track::Track( 1104 MPEG4Writer *owner, const sp<MediaSource> &source, size_t trackId) 1105 : mOwner(owner), 1106 mMeta(source->getFormat()), 1107 mSource(source), 1108 mDone(false), 1109 mPaused(false), 1110 mResumed(false), 1111 mStarted(false), 1112 mTrackId(trackId), 1113 mTrackDurationUs(0), 1114 mEstimatedTrackSizeBytes(0), 1115 mSamplesHaveSameSize(true), 1116 mCodecSpecificData(NULL), 1117 mCodecSpecificDataSize(0), 1118 mGotAllCodecSpecificData(false), 1119 mReachedEOS(false), 1120 mRotation(0) { 1121 getCodecSpecificDataFromInputFormatIfPossible(); 1122 1123 const char *mime; 1124 mMeta->findCString(kKeyMIMEType, &mime); 1125 mIsAvc = !strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_AVC); 1126 mIsAudio = !strncasecmp(mime, "audio/", 6); 1127 mIsMPEG4 = !strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_MPEG4) || 1128 !strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_AAC); 1129 1130 setTimeScale(); 1131} 1132 1133void MPEG4Writer::Track::updateTrackSizeEstimate() { 1134 1135 int64_t stcoBoxSizeBytes = mOwner->use32BitFileOffset() 1136 ? mNumStcoTableEntries * 4 1137 : mNumStcoTableEntries * 8; 1138 1139 int64_t stszBoxSizeBytes = mSamplesHaveSameSize? 4: (mNumSamples * 4); 1140 1141 mEstimatedTrackSizeBytes = mMdatSizeBytes; // media data size 1142 if (!mOwner->isFileStreamable()) { 1143 // Reserved free space is not large enough to hold 1144 // all meta data and thus wasted. 1145 mEstimatedTrackSizeBytes += mNumStscTableEntries * 12 + // stsc box size 1146 mNumStssTableEntries * 4 + // stss box size 1147 mNumSttsTableEntries * 8 + // stts box size 1148 stcoBoxSizeBytes + // stco box size 1149 stszBoxSizeBytes; // stsz box size 1150 } 1151} 1152 1153void MPEG4Writer::Track::addOneStscTableEntry( 1154 size_t chunkId, size_t sampleId) { 1155 1156 StscTableEntry stscEntry(chunkId, sampleId, 1); 1157 mStscTableEntries.push_back(stscEntry); 1158 ++mNumStscTableEntries; 1159} 1160 1161void MPEG4Writer::Track::addOneStssTableEntry(size_t sampleId) { 1162 mStssTableEntries.push_back(sampleId); 1163 ++mNumStssTableEntries; 1164} 1165 1166void MPEG4Writer::Track::addOneSttsTableEntry( 1167 size_t sampleCount, int64_t durationUs) { 1168 1169 SttsTableEntry sttsEntry(sampleCount, durationUs); 1170 mSttsTableEntries.push_back(sttsEntry); 1171 ++mNumSttsTableEntries; 1172} 1173 1174void MPEG4Writer::Track::addChunkOffset(off64_t offset) { 1175 ++mNumStcoTableEntries; 1176 mChunkOffsets.push_back(offset); 1177} 1178 1179void MPEG4Writer::Track::setTimeScale() { 1180 LOGV("setTimeScale"); 1181 // Default time scale 1182 mTimeScale = 90000; 1183 1184 if (mIsAudio) { 1185 // Use the sampling rate as the default time scale for audio track. 1186 int32_t sampleRate; 1187 bool success = mMeta->findInt32(kKeySampleRate, &sampleRate); 1188 CHECK(success); 1189 mTimeScale = sampleRate; 1190 } 1191 1192 // If someone would like to overwrite the timescale, use user-supplied value. 1193 int32_t timeScale; 1194 if (mMeta->findInt32(kKeyTimeScale, &timeScale)) { 1195 mTimeScale = timeScale; 1196 } 1197 1198 CHECK(mTimeScale > 0); 1199} 1200 1201void MPEG4Writer::Track::getCodecSpecificDataFromInputFormatIfPossible() { 1202 const char *mime; 1203 CHECK(mMeta->findCString(kKeyMIMEType, &mime)); 1204 1205 if (!strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_AVC)) { 1206 uint32_t type; 1207 const void *data; 1208 size_t size; 1209 if (mMeta->findData(kKeyAVCC, &type, &data, &size)) { 1210 mCodecSpecificData = malloc(size); 1211 mCodecSpecificDataSize = size; 1212 memcpy(mCodecSpecificData, data, size); 1213 mGotAllCodecSpecificData = true; 1214 } 1215 } else if (!strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_MPEG4) 1216 || !strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_AAC)) { 1217 uint32_t type; 1218 const void *data; 1219 size_t size; 1220 if (mMeta->findData(kKeyESDS, &type, &data, &size)) { 1221 ESDS esds(data, size); 1222 if (esds.getCodecSpecificInfo(&data, &size) == OK) { 1223 mCodecSpecificData = malloc(size); 1224 mCodecSpecificDataSize = size; 1225 memcpy(mCodecSpecificData, data, size); 1226 mGotAllCodecSpecificData = true; 1227 } 1228 } 1229 } 1230} 1231 1232MPEG4Writer::Track::~Track() { 1233 stop(); 1234 1235 if (mCodecSpecificData != NULL) { 1236 free(mCodecSpecificData); 1237 mCodecSpecificData = NULL; 1238 } 1239} 1240 1241void MPEG4Writer::Track::initTrackingProgressStatus(MetaData *params) { 1242 LOGV("initTrackingProgressStatus"); 1243 mPreviousTrackTimeUs = -1; 1244 mTrackingProgressStatus = false; 1245 mTrackEveryTimeDurationUs = 0; 1246 { 1247 int64_t timeUs; 1248 if (params && params->findInt64(kKeyTrackTimeStatus, &timeUs)) { 1249 LOGV("Receive request to track progress status for every %lld us", timeUs); 1250 mTrackEveryTimeDurationUs = timeUs; 1251 mTrackingProgressStatus = true; 1252 } 1253 } 1254} 1255 1256// static 1257void *MPEG4Writer::ThreadWrapper(void *me) { 1258 LOGV("ThreadWrapper: %p", me); 1259 MPEG4Writer *writer = static_cast<MPEG4Writer *>(me); 1260 writer->threadFunc(); 1261 return NULL; 1262} 1263 1264void MPEG4Writer::bufferChunk(const Chunk& chunk) { 1265 LOGV("bufferChunk: %p", chunk.mTrack); 1266 Mutex::Autolock autolock(mLock); 1267 CHECK_EQ(mDone, false); 1268 1269 for (List<ChunkInfo>::iterator it = mChunkInfos.begin(); 1270 it != mChunkInfos.end(); ++it) { 1271 1272 if (chunk.mTrack == it->mTrack) { // Found owner 1273 it->mChunks.push_back(chunk); 1274 mChunkReadyCondition.signal(); 1275 return; 1276 } 1277 } 1278 1279 CHECK("Received a chunk for a unknown track" == 0); 1280} 1281 1282void MPEG4Writer::writeChunkToFile(Chunk* chunk) { 1283 LOGV("writeChunkToFile: %lld from %s track", 1284 chunk.mTimestampUs, chunk.mTrack->isAudio()? "audio": "video"); 1285 1286 int32_t isFirstSample = true; 1287 while (!chunk->mSamples.empty()) { 1288 List<MediaBuffer *>::iterator it = chunk->mSamples.begin(); 1289 1290 off64_t offset = chunk->mTrack->isAvc() 1291 ? addLengthPrefixedSample_l(*it) 1292 : addSample_l(*it); 1293 1294 if (isFirstSample) { 1295 chunk->mTrack->addChunkOffset(offset); 1296 isFirstSample = false; 1297 } 1298 1299 (*it)->release(); 1300 (*it) = NULL; 1301 chunk->mSamples.erase(it); 1302 } 1303 chunk->mSamples.clear(); 1304} 1305 1306void MPEG4Writer::writeAllChunks() { 1307 LOGV("writeAllChunks"); 1308 size_t outstandingChunks = 0; 1309 Chunk chunk; 1310 while (findChunkToWrite(&chunk)) { 1311 ++outstandingChunks; 1312 } 1313 1314 sendSessionSummary(); 1315 1316 mChunkInfos.clear(); 1317 LOGD("%d chunks are written in the last batch", outstandingChunks); 1318} 1319 1320bool MPEG4Writer::findChunkToWrite(Chunk *chunk) { 1321 LOGV("findChunkToWrite"); 1322 1323 int64_t minTimestampUs = 0x7FFFFFFFFFFFFFFFLL; 1324 Track *track = NULL; 1325 for (List<ChunkInfo>::iterator it = mChunkInfos.begin(); 1326 it != mChunkInfos.end(); ++it) { 1327 if (!it->mChunks.empty()) { 1328 List<Chunk>::iterator chunkIt = it->mChunks.begin(); 1329 if (chunkIt->mTimeStampUs < minTimestampUs) { 1330 minTimestampUs = chunkIt->mTimeStampUs; 1331 track = it->mTrack; 1332 } 1333 } 1334 } 1335 1336 if (track == NULL) { 1337 LOGV("Nothing to be written after all"); 1338 return false; 1339 } 1340 1341 if (mIsFirstChunk) { 1342 mIsFirstChunk = false; 1343 } 1344 1345 for (List<ChunkInfo>::iterator it = mChunkInfos.begin(); 1346 it != mChunkInfos.end(); ++it) { 1347 if (it->mTrack == track) { 1348 *chunk = *(it->mChunks.begin()); 1349 it->mChunks.erase(it->mChunks.begin()); 1350 CHECK_EQ(chunk->mTrack, track); 1351 1352 int64_t interChunkTimeUs = 1353 chunk->mTimeStampUs - it->mPrevChunkTimestampUs; 1354 if (interChunkTimeUs > it->mPrevChunkTimestampUs) { 1355 it->mMaxInterChunkDurUs = interChunkTimeUs; 1356 } 1357 1358 return true; 1359 } 1360 } 1361 1362 return false; 1363} 1364 1365void MPEG4Writer::threadFunc() { 1366 LOGV("threadFunc"); 1367 1368 prctl(PR_SET_NAME, (unsigned long)"MPEG4Writer", 0, 0, 0); 1369 1370 Mutex::Autolock autoLock(mLock); 1371 while (!mDone) { 1372 Chunk chunk; 1373 bool chunkFound = false; 1374 1375 while (!mDone && !(chunkFound = findChunkToWrite(&chunk))) { 1376 mChunkReadyCondition.wait(mLock); 1377 } 1378 1379 // Actual write without holding the lock in order to 1380 // reduce the blocking time for media track threads. 1381 if (chunkFound) { 1382 mLock.unlock(); 1383 writeChunkToFile(&chunk); 1384 mLock.lock(); 1385 } 1386 } 1387 1388 writeAllChunks(); 1389} 1390 1391status_t MPEG4Writer::startWriterThread() { 1392 LOGV("startWriterThread"); 1393 1394 mDone = false; 1395 mIsFirstChunk = true; 1396 mDriftTimeUs = 0; 1397 for (List<Track *>::iterator it = mTracks.begin(); 1398 it != mTracks.end(); ++it) { 1399 ChunkInfo info; 1400 info.mTrack = *it; 1401 info.mPrevChunkTimestampUs = 0; 1402 info.mMaxInterChunkDurUs = 0; 1403 mChunkInfos.push_back(info); 1404 } 1405 1406 pthread_attr_t attr; 1407 pthread_attr_init(&attr); 1408 pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE); 1409 pthread_create(&mThread, &attr, ThreadWrapper, this); 1410 pthread_attr_destroy(&attr); 1411 return OK; 1412} 1413 1414 1415status_t MPEG4Writer::Track::start(MetaData *params) { 1416 if (!mDone && mPaused) { 1417 mPaused = false; 1418 mResumed = true; 1419 return OK; 1420 } 1421 1422 int64_t startTimeUs; 1423 if (params == NULL || !params->findInt64(kKeyTime, &startTimeUs)) { 1424 startTimeUs = 0; 1425 } 1426 mStartTimeRealUs = startTimeUs; 1427 1428 int32_t rotationDegrees; 1429 if (!mIsAudio && params && params->findInt32(kKeyRotation, &rotationDegrees)) { 1430 mRotation = rotationDegrees; 1431 } 1432 1433 mIsRealTimeRecording = true; 1434 { 1435 int32_t isNotRealTime; 1436 if (params && params->findInt32(kKeyNotRealTime, &isNotRealTime)) { 1437 mIsRealTimeRecording = (isNotRealTime == 0); 1438 } 1439 } 1440 1441 initTrackingProgressStatus(params); 1442 1443 sp<MetaData> meta = new MetaData; 1444 if (mIsRealTimeRecording && mOwner->numTracks() > 1) { 1445 /* 1446 * This extra delay of accepting incoming audio/video signals 1447 * helps to align a/v start time at the beginning of a recording 1448 * session, and it also helps eliminate the "recording" sound for 1449 * camcorder applications. 1450 * 1451 * If client does not set the start time offset, we fall back to 1452 * use the default initial delay value. 1453 */ 1454 int64_t startTimeOffsetUs = mOwner->getStartTimeOffsetMs() * 1000LL; 1455 if (startTimeOffsetUs < 0) { // Start time offset was not set 1456 startTimeOffsetUs = kInitialDelayTimeUs; 1457 } 1458 startTimeUs += startTimeOffsetUs; 1459 LOGI("Start time offset: %lld us", startTimeOffsetUs); 1460 } 1461 1462 meta->setInt64(kKeyTime, startTimeUs); 1463 1464 status_t err = mSource->start(meta.get()); 1465 if (err != OK) { 1466 mDone = mReachedEOS = true; 1467 return err; 1468 } 1469 1470 pthread_attr_t attr; 1471 pthread_attr_init(&attr); 1472 pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE); 1473 1474 mDone = false; 1475 mStarted = true; 1476 mTrackDurationUs = 0; 1477 mReachedEOS = false; 1478 mEstimatedTrackSizeBytes = 0; 1479 mNumStcoTableEntries = 0; 1480 mNumStssTableEntries = 0; 1481 mNumStscTableEntries = 0; 1482 mNumSttsTableEntries = 0; 1483 mMdatSizeBytes = 0; 1484 mIsMediaTimeAdjustmentOn = false; 1485 mPrevMediaTimeAdjustTimestampUs = 0; 1486 mMediaTimeAdjustNumFrames = 0; 1487 mPrevMediaTimeAdjustSample = 0; 1488 mTotalDriftTimeToAdjustUs = 0; 1489 mPrevTotalAccumDriftTimeUs = 0; 1490 mMaxChunkDurationUs = 0; 1491 1492 pthread_create(&mThread, &attr, ThreadWrapper, this); 1493 pthread_attr_destroy(&attr); 1494 1495 return OK; 1496} 1497 1498status_t MPEG4Writer::Track::pause() { 1499 mPaused = true; 1500 return OK; 1501} 1502 1503status_t MPEG4Writer::Track::stop() { 1504 LOGD("Stopping %s track", mIsAudio? "Audio": "Video"); 1505 if (!mStarted) { 1506 LOGE("Stop() called but track is not started"); 1507 return ERROR_END_OF_STREAM; 1508 } 1509 1510 if (mDone) { 1511 return OK; 1512 } 1513 mDone = true; 1514 1515 void *dummy; 1516 pthread_join(mThread, &dummy); 1517 1518 status_t err = (status_t) dummy; 1519 1520 LOGD("Stopping %s track source", mIsAudio? "Audio": "Video"); 1521 { 1522 status_t status = mSource->stop(); 1523 if (err == OK && status != OK && status != ERROR_END_OF_STREAM) { 1524 err = status; 1525 } 1526 } 1527 1528 LOGD("%s track stopped", mIsAudio? "Audio": "Video"); 1529 return err; 1530} 1531 1532bool MPEG4Writer::Track::reachedEOS() { 1533 return mReachedEOS; 1534} 1535 1536// static 1537void *MPEG4Writer::Track::ThreadWrapper(void *me) { 1538 Track *track = static_cast<Track *>(me); 1539 1540 status_t err = track->threadEntry(); 1541 return (void *) err; 1542} 1543 1544static void getNalUnitType(uint8_t byte, uint8_t* type) { 1545 LOGV("getNalUnitType: %d", byte); 1546 1547 // nal_unit_type: 5-bit unsigned integer 1548 *type = (byte & 0x1F); 1549} 1550 1551static const uint8_t *findNextStartCode( 1552 const uint8_t *data, size_t length) { 1553 1554 LOGV("findNextStartCode: %p %d", data, length); 1555 1556 size_t bytesLeft = length; 1557 while (bytesLeft > 4 && 1558 memcmp("\x00\x00\x00\x01", &data[length - bytesLeft], 4)) { 1559 --bytesLeft; 1560 } 1561 if (bytesLeft <= 4) { 1562 bytesLeft = 0; // Last parameter set 1563 } 1564 return &data[length - bytesLeft]; 1565} 1566 1567const uint8_t *MPEG4Writer::Track::parseParamSet( 1568 const uint8_t *data, size_t length, int type, size_t *paramSetLen) { 1569 1570 LOGV("parseParamSet"); 1571 CHECK(type == kNalUnitTypeSeqParamSet || 1572 type == kNalUnitTypePicParamSet); 1573 1574 const uint8_t *nextStartCode = findNextStartCode(data, length); 1575 *paramSetLen = nextStartCode - data; 1576 if (*paramSetLen == 0) { 1577 LOGE("Param set is malformed, since its length is 0"); 1578 return NULL; 1579 } 1580 1581 AVCParamSet paramSet(*paramSetLen, data); 1582 if (type == kNalUnitTypeSeqParamSet) { 1583 if (*paramSetLen < 4) { 1584 LOGE("Seq parameter set malformed"); 1585 return NULL; 1586 } 1587 if (mSeqParamSets.empty()) { 1588 mProfileIdc = data[1]; 1589 mProfileCompatible = data[2]; 1590 mLevelIdc = data[3]; 1591 } else { 1592 if (mProfileIdc != data[1] || 1593 mProfileCompatible != data[2] || 1594 mLevelIdc != data[3]) { 1595 LOGE("Inconsistent profile/level found in seq parameter sets"); 1596 return NULL; 1597 } 1598 } 1599 mSeqParamSets.push_back(paramSet); 1600 } else { 1601 mPicParamSets.push_back(paramSet); 1602 } 1603 return nextStartCode; 1604} 1605 1606status_t MPEG4Writer::Track::copyAVCCodecSpecificData( 1607 const uint8_t *data, size_t size) { 1608 LOGV("copyAVCCodecSpecificData"); 1609 1610 // 2 bytes for each of the parameter set length field 1611 // plus the 7 bytes for the header 1612 if (size < 4 + 7) { 1613 LOGE("Codec specific data length too short: %d", size); 1614 return ERROR_MALFORMED; 1615 } 1616 1617 mCodecSpecificDataSize = size; 1618 mCodecSpecificData = malloc(size); 1619 memcpy(mCodecSpecificData, data, size); 1620 return OK; 1621} 1622 1623status_t MPEG4Writer::Track::parseAVCCodecSpecificData( 1624 const uint8_t *data, size_t size) { 1625 1626 LOGV("parseAVCCodecSpecificData"); 1627 // Data starts with a start code. 1628 // SPS and PPS are separated with start codes. 1629 // Also, SPS must come before PPS 1630 uint8_t type = kNalUnitTypeSeqParamSet; 1631 bool gotSps = false; 1632 bool gotPps = false; 1633 const uint8_t *tmp = data; 1634 const uint8_t *nextStartCode = data; 1635 size_t bytesLeft = size; 1636 size_t paramSetLen = 0; 1637 mCodecSpecificDataSize = 0; 1638 while (bytesLeft > 4 && !memcmp("\x00\x00\x00\x01", tmp, 4)) { 1639 getNalUnitType(*(tmp + 4), &type); 1640 if (type == kNalUnitTypeSeqParamSet) { 1641 if (gotPps) { 1642 LOGE("SPS must come before PPS"); 1643 return ERROR_MALFORMED; 1644 } 1645 if (!gotSps) { 1646 gotSps = true; 1647 } 1648 nextStartCode = parseParamSet(tmp + 4, bytesLeft - 4, type, ¶mSetLen); 1649 } else if (type == kNalUnitTypePicParamSet) { 1650 if (!gotSps) { 1651 LOGE("SPS must come before PPS"); 1652 return ERROR_MALFORMED; 1653 } 1654 if (!gotPps) { 1655 gotPps = true; 1656 } 1657 nextStartCode = parseParamSet(tmp + 4, bytesLeft - 4, type, ¶mSetLen); 1658 } else { 1659 LOGE("Only SPS and PPS Nal units are expected"); 1660 return ERROR_MALFORMED; 1661 } 1662 1663 if (nextStartCode == NULL) { 1664 return ERROR_MALFORMED; 1665 } 1666 1667 // Move on to find the next parameter set 1668 bytesLeft -= nextStartCode - tmp; 1669 tmp = nextStartCode; 1670 mCodecSpecificDataSize += (2 + paramSetLen); 1671 } 1672 1673 { 1674 // Check on the number of seq parameter sets 1675 size_t nSeqParamSets = mSeqParamSets.size(); 1676 if (nSeqParamSets == 0) { 1677 LOGE("Cound not find sequence parameter set"); 1678 return ERROR_MALFORMED; 1679 } 1680 1681 if (nSeqParamSets > 0x1F) { 1682 LOGE("Too many seq parameter sets (%d) found", nSeqParamSets); 1683 return ERROR_MALFORMED; 1684 } 1685 } 1686 1687 { 1688 // Check on the number of pic parameter sets 1689 size_t nPicParamSets = mPicParamSets.size(); 1690 if (nPicParamSets == 0) { 1691 LOGE("Cound not find picture parameter set"); 1692 return ERROR_MALFORMED; 1693 } 1694 if (nPicParamSets > 0xFF) { 1695 LOGE("Too many pic parameter sets (%d) found", nPicParamSets); 1696 return ERROR_MALFORMED; 1697 } 1698 } 1699 1700 { 1701 // Check on the profiles 1702 // These profiles requires additional parameter set extensions 1703 if (mProfileIdc == 100 || mProfileIdc == 110 || 1704 mProfileIdc == 122 || mProfileIdc == 144) { 1705 LOGE("Sorry, no support for profile_idc: %d!", mProfileIdc); 1706 return BAD_VALUE; 1707 } 1708 } 1709 1710 return OK; 1711} 1712 1713status_t MPEG4Writer::Track::makeAVCCodecSpecificData( 1714 const uint8_t *data, size_t size) { 1715 1716 if (mCodecSpecificData != NULL) { 1717 LOGE("Already have codec specific data"); 1718 return ERROR_MALFORMED; 1719 } 1720 1721 if (size < 4) { 1722 LOGE("Codec specific data length too short: %d", size); 1723 return ERROR_MALFORMED; 1724 } 1725 1726 // Data is in the form of AVCCodecSpecificData 1727 if (memcmp("\x00\x00\x00\x01", data, 4)) { 1728 return copyAVCCodecSpecificData(data, size); 1729 } 1730 1731 if (parseAVCCodecSpecificData(data, size) != OK) { 1732 return ERROR_MALFORMED; 1733 } 1734 1735 // ISO 14496-15: AVC file format 1736 mCodecSpecificDataSize += 7; // 7 more bytes in the header 1737 mCodecSpecificData = malloc(mCodecSpecificDataSize); 1738 uint8_t *header = (uint8_t *)mCodecSpecificData; 1739 header[0] = 1; // version 1740 header[1] = mProfileIdc; // profile indication 1741 header[2] = mProfileCompatible; // profile compatibility 1742 header[3] = mLevelIdc; 1743 1744 // 6-bit '111111' followed by 2-bit to lengthSizeMinuusOne 1745 if (mOwner->useNalLengthFour()) { 1746 header[4] = 0xfc | 3; // length size == 4 bytes 1747 } else { 1748 header[4] = 0xfc | 1; // length size == 2 bytes 1749 } 1750 1751 // 3-bit '111' followed by 5-bit numSequenceParameterSets 1752 int nSequenceParamSets = mSeqParamSets.size(); 1753 header[5] = 0xe0 | nSequenceParamSets; 1754 header += 6; 1755 for (List<AVCParamSet>::iterator it = mSeqParamSets.begin(); 1756 it != mSeqParamSets.end(); ++it) { 1757 // 16-bit sequence parameter set length 1758 uint16_t seqParamSetLength = it->mLength; 1759 header[0] = seqParamSetLength >> 8; 1760 header[1] = seqParamSetLength & 0xff; 1761 1762 // SPS NAL unit (sequence parameter length bytes) 1763 memcpy(&header[2], it->mData, seqParamSetLength); 1764 header += (2 + seqParamSetLength); 1765 } 1766 1767 // 8-bit nPictureParameterSets 1768 int nPictureParamSets = mPicParamSets.size(); 1769 header[0] = nPictureParamSets; 1770 header += 1; 1771 for (List<AVCParamSet>::iterator it = mPicParamSets.begin(); 1772 it != mPicParamSets.end(); ++it) { 1773 // 16-bit picture parameter set length 1774 uint16_t picParamSetLength = it->mLength; 1775 header[0] = picParamSetLength >> 8; 1776 header[1] = picParamSetLength & 0xff; 1777 1778 // PPS Nal unit (picture parameter set length bytes) 1779 memcpy(&header[2], it->mData, picParamSetLength); 1780 header += (2 + picParamSetLength); 1781 } 1782 1783 return OK; 1784} 1785 1786/* 1787* The video track's media time adjustment for real-time applications 1788* is described as follows: 1789* 1790* First, the media time adjustment is done for every period of 1791* kVideoMediaTimeAdjustPeriodTimeUs. kVideoMediaTimeAdjustPeriodTimeUs 1792* is currently a fixed value chosen heuristically. The value of 1793* kVideoMediaTimeAdjustPeriodTimeUs should not be very large or very small 1794* for two considerations: on one hand, a relatively large value 1795* helps reduce large fluctuation of drift time in the audio encoding 1796* path; while on the other hand, a relatively small value helps keep 1797* restoring synchronization in audio/video more frequently. Note for the 1798* very first period of kVideoMediaTimeAdjustPeriodTimeUs, there is 1799* no media time adjustment for the video track. 1800* 1801* Second, the total accumulated audio track time drift found 1802* in a period of kVideoMediaTimeAdjustPeriodTimeUs is distributed 1803* over a stream of incoming video frames. The number of video frames 1804* affected is determined based on the number of recorded video frames 1805* within the past kVideoMediaTimeAdjustPeriodTimeUs period. 1806* We choose to distribute the drift time over only a portion 1807* (rather than all) of the total number of recorded video frames 1808* in order to make sure that the video track media time adjustment is 1809* completed for the current period before the next video track media 1810* time adjustment period starts. Currently, the portion chosen is a 1811* half (0.5). 1812* 1813* Last, various additional checks are performed to ensure that 1814* the actual audio encoding path does not have too much drift. 1815* In particular, 1) we want to limit the average incremental time 1816* adjustment for each video frame to be less than a threshold 1817* for a single period of kVideoMediaTimeAdjustPeriodTimeUs. 1818* Currently, the threshold is set to 5 ms. If the average incremental 1819* media time adjustment for a video frame is larger than the 1820* threshold, the audio encoding path has too much time drift. 1821* 2) We also want to limit the total time drift in the audio 1822* encoding path to be less than a threshold for a period of 1823* kVideoMediaTimeAdjustPeriodTimeUs. Currently, the threshold 1824* is 0.5% of kVideoMediaTimeAdjustPeriodTimeUs. If the time drift of 1825* the audio encoding path is larger than the threshold, the audio 1826* encoding path has too much time drift. We treat the large time 1827* drift of the audio encoding path as errors, since there is no 1828* way to keep audio/video in synchronization for real-time 1829* applications if the time drift is too large unless we drop some 1830* video frames, which has its own problems that we don't want 1831* to get into for the time being. 1832*/ 1833void MPEG4Writer::Track::adjustMediaTime(int64_t *timestampUs) { 1834 if (*timestampUs - mPrevMediaTimeAdjustTimestampUs >= 1835 kVideoMediaTimeAdjustPeriodTimeUs) { 1836 1837 LOGV("New media time adjustment period at %lld us", *timestampUs); 1838 mIsMediaTimeAdjustmentOn = true; 1839 mMediaTimeAdjustNumFrames = 1840 (mNumSamples - mPrevMediaTimeAdjustSample) >> 1; 1841 1842 mPrevMediaTimeAdjustTimestampUs = *timestampUs; 1843 mPrevMediaTimeAdjustSample = mNumSamples; 1844 int64_t totalAccumDriftTimeUs = mOwner->getDriftTimeUs(); 1845 mTotalDriftTimeToAdjustUs = 1846 totalAccumDriftTimeUs - mPrevTotalAccumDriftTimeUs; 1847 1848 mPrevTotalAccumDriftTimeUs = totalAccumDriftTimeUs; 1849 1850 // Check on incremental adjusted time per frame 1851 int64_t adjustTimePerFrameUs = 1852 mTotalDriftTimeToAdjustUs / mMediaTimeAdjustNumFrames; 1853 1854 if (adjustTimePerFrameUs < 0) { 1855 adjustTimePerFrameUs = -adjustTimePerFrameUs; 1856 } 1857 if (adjustTimePerFrameUs >= 5000) { 1858 LOGE("Adjusted time per video frame is %lld us", 1859 adjustTimePerFrameUs); 1860 CHECK(!"Video frame time adjustment is too large!"); 1861 } 1862 1863 // Check on total accumulated time drift within a period of 1864 // kVideoMediaTimeAdjustPeriodTimeUs. 1865 int64_t driftPercentage = (mTotalDriftTimeToAdjustUs * 1000) 1866 / kVideoMediaTimeAdjustPeriodTimeUs; 1867 1868 if (driftPercentage < 0) { 1869 driftPercentage = -driftPercentage; 1870 } 1871 if (driftPercentage > 5) { 1872 LOGE("Audio track has time drift %lld us over %lld us", 1873 mTotalDriftTimeToAdjustUs, 1874 kVideoMediaTimeAdjustPeriodTimeUs); 1875 1876 CHECK(!"The audio track media time drifts too much!"); 1877 } 1878 1879 } 1880 1881 if (mIsMediaTimeAdjustmentOn) { 1882 if (mNumSamples - mPrevMediaTimeAdjustSample <= 1883 mMediaTimeAdjustNumFrames) { 1884 1885 // Do media time incremental adjustment 1886 int64_t incrementalAdjustTimeUs = 1887 (mTotalDriftTimeToAdjustUs * 1888 (mNumSamples - mPrevMediaTimeAdjustSample)) 1889 / mMediaTimeAdjustNumFrames; 1890 1891 *timestampUs += 1892 (incrementalAdjustTimeUs + mPrevTotalAccumDriftTimeUs); 1893 1894 LOGV("Incremental video frame media time adjustment: %lld us", 1895 (incrementalAdjustTimeUs + mPrevTotalAccumDriftTimeUs)); 1896 } else { 1897 // Within the remaining adjustment period, 1898 // no incremental adjustment is needed. 1899 *timestampUs += 1900 (mTotalDriftTimeToAdjustUs + mPrevTotalAccumDriftTimeUs); 1901 1902 LOGV("Fixed video frame media time adjustment: %lld us", 1903 (mTotalDriftTimeToAdjustUs + mPrevTotalAccumDriftTimeUs)); 1904 } 1905 } 1906} 1907 1908/* 1909 * Updates the drift time from the audio track so that 1910 * the video track can get the updated drift time information 1911 * from the file writer. The fluctuation of the drift time of the audio 1912 * encoding path is smoothed out with a simple filter by giving a larger 1913 * weight to more recently drift time. The filter coefficients, 0.5 and 0.5, 1914 * are heuristically determined. 1915 */ 1916void MPEG4Writer::Track::updateDriftTime(const sp<MetaData>& meta) { 1917 int64_t driftTimeUs = 0; 1918 if (meta->findInt64(kKeyDriftTime, &driftTimeUs)) { 1919 int64_t prevDriftTimeUs = mOwner->getDriftTimeUs(); 1920 int64_t timeUs = (driftTimeUs + prevDriftTimeUs) >> 1; 1921 mOwner->setDriftTimeUs(timeUs); 1922 } 1923} 1924 1925status_t MPEG4Writer::Track::threadEntry() { 1926 int32_t count = 0; 1927 const int64_t interleaveDurationUs = mOwner->interleaveDuration(); 1928 const bool hasMultipleTracks = (mOwner->numTracks() > 1); 1929 int64_t chunkTimestampUs = 0; 1930 int32_t nChunks = 0; 1931 int32_t nZeroLengthFrames = 0; 1932 int64_t lastTimestampUs = 0; // Previous sample time stamp in ms 1933 int64_t lastDurationUs = 0; // Between the previous two samples in ms 1934 int64_t currDurationTicks = 0; // Timescale based ticks 1935 int64_t lastDurationTicks = 0; // Timescale based ticks 1936 int32_t sampleCount = 1; // Sample count in the current stts table entry 1937 uint32_t previousSampleSize = 0; // Size of the previous sample 1938 int64_t previousPausedDurationUs = 0; 1939 int64_t timestampUs; 1940 1941 if (mIsAudio) { 1942 prctl(PR_SET_NAME, (unsigned long)"AudioTrackEncoding", 0, 0, 0); 1943 } else { 1944 prctl(PR_SET_NAME, (unsigned long)"VideoTrackEncoding", 0, 0, 0); 1945 } 1946 setpriority(PRIO_PROCESS, 0, ANDROID_PRIORITY_AUDIO); 1947 1948 sp<MetaData> meta_data; 1949 1950 mNumSamples = 0; 1951 status_t err = OK; 1952 MediaBuffer *buffer; 1953 while (!mDone && (err = mSource->read(&buffer)) == OK) { 1954 if (buffer->range_length() == 0) { 1955 buffer->release(); 1956 buffer = NULL; 1957 ++nZeroLengthFrames; 1958 continue; 1959 } 1960 1961 // If the codec specific data has not been received yet, delay pause. 1962 // After the codec specific data is received, discard what we received 1963 // when the track is to be paused. 1964 if (mPaused && !mResumed) { 1965 buffer->release(); 1966 buffer = NULL; 1967 continue; 1968 } 1969 1970 ++count; 1971 1972 int32_t isCodecConfig; 1973 if (buffer->meta_data()->findInt32(kKeyIsCodecConfig, &isCodecConfig) 1974 && isCodecConfig) { 1975 CHECK(!mGotAllCodecSpecificData); 1976 1977 if (mIsAvc) { 1978 status_t err = makeAVCCodecSpecificData( 1979 (const uint8_t *)buffer->data() 1980 + buffer->range_offset(), 1981 buffer->range_length()); 1982 CHECK_EQ(OK, err); 1983 } else if (mIsMPEG4) { 1984 mCodecSpecificDataSize = buffer->range_length(); 1985 mCodecSpecificData = malloc(mCodecSpecificDataSize); 1986 memcpy(mCodecSpecificData, 1987 (const uint8_t *)buffer->data() 1988 + buffer->range_offset(), 1989 buffer->range_length()); 1990 } 1991 1992 buffer->release(); 1993 buffer = NULL; 1994 1995 mGotAllCodecSpecificData = true; 1996 continue; 1997 } 1998 1999 // Make a deep copy of the MediaBuffer and Metadata and release 2000 // the original as soon as we can 2001 MediaBuffer *copy = new MediaBuffer(buffer->range_length()); 2002 memcpy(copy->data(), (uint8_t *)buffer->data() + buffer->range_offset(), 2003 buffer->range_length()); 2004 copy->set_range(0, buffer->range_length()); 2005 meta_data = new MetaData(*buffer->meta_data().get()); 2006 buffer->release(); 2007 buffer = NULL; 2008 2009 if (mIsAvc) StripStartcode(copy); 2010 2011 size_t sampleSize = copy->range_length(); 2012 if (mIsAvc) { 2013 if (mOwner->useNalLengthFour()) { 2014 sampleSize += 4; 2015 } else { 2016 sampleSize += 2; 2017 } 2018 } 2019 2020 // Max file size or duration handling 2021 mMdatSizeBytes += sampleSize; 2022 updateTrackSizeEstimate(); 2023 2024 if (mOwner->exceedsFileSizeLimit()) { 2025 mOwner->notify(MEDIA_RECORDER_EVENT_INFO, MEDIA_RECORDER_INFO_MAX_FILESIZE_REACHED, 0); 2026 break; 2027 } 2028 if (mOwner->exceedsFileDurationLimit()) { 2029 mOwner->notify(MEDIA_RECORDER_EVENT_INFO, MEDIA_RECORDER_INFO_MAX_DURATION_REACHED, 0); 2030 break; 2031 } 2032 2033 2034 int32_t isSync = false; 2035 meta_data->findInt32(kKeyIsSyncFrame, &isSync); 2036 2037 /* 2038 * The original timestamp found in the data buffer will be modified as below: 2039 * 2040 * There is a playback offset into this track if the track's start time 2041 * is not the same as the movie start time, which will be recorded in edst 2042 * box of the output file. The playback offset is to make sure that the 2043 * starting time of the audio/video tracks are synchronized. Although the 2044 * track's media timestamp may be subject to various modifications 2045 * as outlined below, the track's playback offset time remains unchanged 2046 * once the first data buffer of the track is received. 2047 * 2048 * The media time stamp will be calculated by subtracting the playback offset 2049 * (and potential pause durations) from the original timestamp in the buffer. 2050 * 2051 * If this track is a video track for a real-time recording application with 2052 * both audio and video tracks, its media timestamp will subject to further 2053 * modification based on the media clock of the audio track. This modification 2054 * is needed for the purpose of maintaining good audio/video synchronization. 2055 * 2056 * If the recording session is paused and resumed multiple times, the track 2057 * media timestamp will be modified as if the recording session had never been 2058 * paused at all during playback of the recorded output file. In other words, 2059 * the output file will have no memory of pause/resume durations. 2060 * 2061 */ 2062 CHECK(meta_data->findInt64(kKeyTime, ×tampUs)); 2063 LOGV("%s timestampUs: %lld", mIsAudio? "Audio": "Video", timestampUs); 2064 2065//////////////////////////////////////////////////////////////////////////////// 2066 if (mNumSamples == 0) { 2067 mFirstSampleTimeRealUs = systemTime() / 1000; 2068 mStartTimestampUs = timestampUs; 2069 mOwner->setStartTimestampUs(mStartTimestampUs); 2070 previousPausedDurationUs = mStartTimestampUs; 2071 } 2072 2073 if (mResumed) { 2074 int64_t durExcludingEarlierPausesUs = timestampUs - previousPausedDurationUs; 2075 CHECK(durExcludingEarlierPausesUs >= 0); 2076 int64_t pausedDurationUs = durExcludingEarlierPausesUs - mTrackDurationUs; 2077 CHECK(pausedDurationUs >= lastDurationUs); 2078 previousPausedDurationUs += pausedDurationUs - lastDurationUs; 2079 mResumed = false; 2080 } 2081 2082 timestampUs -= previousPausedDurationUs; 2083 CHECK(timestampUs >= 0); 2084 2085 // Media time adjustment for real-time applications 2086 if (mIsRealTimeRecording) { 2087 if (mIsAudio) { 2088 updateDriftTime(meta_data); 2089 } else { 2090 adjustMediaTime(×tampUs); 2091 } 2092 } 2093 2094 CHECK(timestampUs >= 0); 2095 if (mNumSamples > 1) { 2096 if (timestampUs <= lastTimestampUs) { 2097 LOGW("Frame arrives too late!"); 2098 // Don't drop the late frame, since dropping a frame may cause 2099 // problems later during playback 2100 2101 // The idea here is to avoid having two or more samples with the 2102 // same timestamp in the output file. 2103 if (mTimeScale >= 1000000LL) { 2104 timestampUs = lastTimestampUs + 1; 2105 } else { 2106 timestampUs = lastTimestampUs + (1000000LL + (mTimeScale >> 1)) / mTimeScale; 2107 } 2108 } 2109 } 2110 2111 LOGV("%s media time stamp: %lld and previous paused duration %lld", 2112 mIsAudio? "Audio": "Video", timestampUs, previousPausedDurationUs); 2113 if (timestampUs > mTrackDurationUs) { 2114 mTrackDurationUs = timestampUs; 2115 } 2116 2117 mSampleSizes.push_back(sampleSize); 2118 ++mNumSamples; 2119 if (mNumSamples > 2) { 2120 // We need to use the time scale based ticks, rather than the 2121 // timestamp itself to determine whether we have to use a new 2122 // stts entry, since we may have rounding errors. 2123 // The calculation is intended to reduce the accumulated 2124 // rounding errors. 2125 currDurationTicks = 2126 ((timestampUs * mTimeScale + 500000LL) / 1000000LL - 2127 (lastTimestampUs * mTimeScale + 500000LL) / 1000000LL); 2128 2129 // Force the first sample to have its own stts entry so that 2130 // we can adjust its value later to maintain the A/V sync. 2131 if (mNumSamples == 3 || currDurationTicks != lastDurationTicks) { 2132 LOGV("%s lastDurationUs: %lld us, currDurationTicks: %lld us", 2133 mIsAudio? "Audio": "Video", lastDurationUs, currDurationTicks); 2134 addOneSttsTableEntry(sampleCount, lastDurationUs); 2135 sampleCount = 1; 2136 } else { 2137 ++sampleCount; 2138 } 2139 } 2140 if (mSamplesHaveSameSize) { 2141 if (mNumSamples >= 2 && previousSampleSize != sampleSize) { 2142 mSamplesHaveSameSize = false; 2143 } 2144 previousSampleSize = sampleSize; 2145 } 2146 LOGV("%s timestampUs/lastTimestampUs: %lld/%lld", 2147 mIsAudio? "Audio": "Video", timestampUs, lastTimestampUs); 2148 lastDurationUs = timestampUs - lastTimestampUs; 2149 lastDurationTicks = currDurationTicks; 2150 lastTimestampUs = timestampUs; 2151 2152 if (isSync != 0) { 2153 addOneStssTableEntry(mNumSamples); 2154 } 2155 2156 if (mTrackingProgressStatus) { 2157 if (mPreviousTrackTimeUs <= 0) { 2158 mPreviousTrackTimeUs = mStartTimestampUs; 2159 } 2160 trackProgressStatus(timestampUs); 2161 } 2162 if (!hasMultipleTracks) { 2163 off64_t offset = mIsAvc? mOwner->addLengthPrefixedSample_l(copy) 2164 : mOwner->addSample_l(copy); 2165 if (mChunkOffsets.empty()) { 2166 addChunkOffset(offset); 2167 } 2168 copy->release(); 2169 copy = NULL; 2170 continue; 2171 } 2172 2173 mChunkSamples.push_back(copy); 2174 if (interleaveDurationUs == 0) { 2175 addOneStscTableEntry(++nChunks, 1); 2176 bufferChunk(timestampUs); 2177 } else { 2178 if (chunkTimestampUs == 0) { 2179 chunkTimestampUs = timestampUs; 2180 } else { 2181 int64_t chunkDurationUs = timestampUs - chunkTimestampUs; 2182 if (chunkDurationUs > interleaveDurationUs) { 2183 if (chunkDurationUs > mMaxChunkDurationUs) { 2184 mMaxChunkDurationUs = chunkDurationUs; 2185 } 2186 ++nChunks; 2187 if (nChunks == 1 || // First chunk 2188 (--(mStscTableEntries.end()))->samplesPerChunk != 2189 mChunkSamples.size()) { 2190 addOneStscTableEntry(nChunks, mChunkSamples.size()); 2191 } 2192 bufferChunk(timestampUs); 2193 chunkTimestampUs = timestampUs; 2194 } 2195 } 2196 } 2197 2198 } 2199 2200 if (mSampleSizes.empty() || // no samples written 2201 (!mIsAudio && mNumStssTableEntries == 0) || // no sync frames for video 2202 (OK != checkCodecSpecificData())) { // no codec specific data 2203 err = ERROR_MALFORMED; 2204 } 2205 mOwner->trackProgressStatus(mTrackId, -1, err); 2206 2207 // Last chunk 2208 if (!hasMultipleTracks) { 2209 addOneStscTableEntry(1, mNumSamples); 2210 } else if (!mChunkSamples.empty()) { 2211 addOneStscTableEntry(++nChunks, mChunkSamples.size()); 2212 bufferChunk(timestampUs); 2213 } 2214 2215 // We don't really know how long the last frame lasts, since 2216 // there is no frame time after it, just repeat the previous 2217 // frame's duration. 2218 if (mNumSamples == 1) { 2219 lastDurationUs = 0; // A single sample's duration 2220 } else { 2221 ++sampleCount; // Count for the last sample 2222 } 2223 2224 if (mNumSamples <= 2) { 2225 addOneSttsTableEntry(1, lastDurationUs); 2226 if (sampleCount - 1 > 0) { 2227 addOneSttsTableEntry(sampleCount - 1, lastDurationUs); 2228 } 2229 } else { 2230 addOneSttsTableEntry(sampleCount, lastDurationUs); 2231 } 2232 2233 mTrackDurationUs += lastDurationUs; 2234 mReachedEOS = true; 2235 2236 sendTrackSummary(hasMultipleTracks); 2237 2238 LOGI("Received total/0-length (%d/%d) buffers and encoded %d frames. - %s", 2239 count, nZeroLengthFrames, mNumSamples, mIsAudio? "audio": "video"); 2240 if (mIsAudio) { 2241 LOGI("Audio track drift time: %lld us", mOwner->getDriftTimeUs()); 2242 } 2243 2244 if (err == ERROR_END_OF_STREAM) { 2245 return OK; 2246 } 2247 return err; 2248} 2249 2250void MPEG4Writer::Track::sendTrackSummary(bool hasMultipleTracks) { 2251 2252 // Send track summary only if test mode is enabled. 2253 if (!isTestModeEnabled()) { 2254 return; 2255 } 2256 2257 int trackNum = (mTrackId << 28); 2258 2259 mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2260 trackNum | MEDIA_RECORDER_TRACK_INFO_TYPE, 2261 mIsAudio? 0: 1); 2262 2263 mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2264 trackNum | MEDIA_RECORDER_TRACK_INFO_DURATION_MS, 2265 mTrackDurationUs / 1000); 2266 2267 mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2268 trackNum | MEDIA_RECORDER_TRACK_INFO_ENCODED_FRAMES, 2269 mNumSamples); 2270 2271 { 2272 // The system delay time excluding the requested initial delay that 2273 // is used to eliminate the recording sound. 2274 int64_t startTimeOffsetUs = mOwner->getStartTimeOffsetMs() * 1000LL; 2275 if (startTimeOffsetUs < 0) { // Start time offset was not set 2276 startTimeOffsetUs = kInitialDelayTimeUs; 2277 } 2278 int64_t initialDelayUs = 2279 mFirstSampleTimeRealUs - mStartTimeRealUs - startTimeOffsetUs; 2280 2281 mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2282 trackNum | MEDIA_RECORDER_TRACK_INFO_INITIAL_DELAY_MS, 2283 (initialDelayUs) / 1000); 2284 } 2285 2286 mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2287 trackNum | MEDIA_RECORDER_TRACK_INFO_DATA_KBYTES, 2288 mMdatSizeBytes / 1024); 2289 2290 if (hasMultipleTracks) { 2291 mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2292 trackNum | MEDIA_RECORDER_TRACK_INFO_MAX_CHUNK_DUR_MS, 2293 mMaxChunkDurationUs / 1000); 2294 2295 int64_t moovStartTimeUs = mOwner->getStartTimestampUs(); 2296 if (mStartTimestampUs != moovStartTimeUs) { 2297 int64_t startTimeOffsetUs = mStartTimestampUs - moovStartTimeUs; 2298 mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2299 trackNum | MEDIA_RECORDER_TRACK_INFO_START_OFFSET_MS, 2300 startTimeOffsetUs / 1000); 2301 } 2302 } 2303} 2304 2305void MPEG4Writer::Track::trackProgressStatus(int64_t timeUs, status_t err) { 2306 LOGV("trackProgressStatus: %lld us", timeUs); 2307 if (mTrackEveryTimeDurationUs > 0 && 2308 timeUs - mPreviousTrackTimeUs >= mTrackEveryTimeDurationUs) { 2309 LOGV("Fire time tracking progress status at %lld us", timeUs); 2310 mOwner->trackProgressStatus(mTrackId, timeUs - mPreviousTrackTimeUs, err); 2311 mPreviousTrackTimeUs = timeUs; 2312 } 2313} 2314 2315void MPEG4Writer::trackProgressStatus( 2316 size_t trackId, int64_t timeUs, status_t err) { 2317 Mutex::Autolock lock(mLock); 2318 int32_t trackNum = (trackId << 28); 2319 2320 // Error notification 2321 // Do not consider ERROR_END_OF_STREAM an error 2322 if (err != OK && err != ERROR_END_OF_STREAM) { 2323 notify(MEDIA_RECORDER_TRACK_EVENT_ERROR, 2324 trackNum | MEDIA_RECORDER_TRACK_ERROR_GENERAL, 2325 err); 2326 return; 2327 } 2328 2329 if (timeUs == -1) { 2330 // Send completion notification 2331 notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2332 trackNum | MEDIA_RECORDER_TRACK_INFO_COMPLETION_STATUS, 2333 err); 2334 } else { 2335 // Send progress status 2336 notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2337 trackNum | MEDIA_RECORDER_TRACK_INFO_PROGRESS_IN_TIME, 2338 timeUs / 1000); 2339 } 2340} 2341 2342void MPEG4Writer::setDriftTimeUs(int64_t driftTimeUs) { 2343 LOGV("setDriftTimeUs: %lld us", driftTimeUs); 2344 Mutex::Autolock autolock(mLock); 2345 mDriftTimeUs = driftTimeUs; 2346} 2347 2348int64_t MPEG4Writer::getDriftTimeUs() { 2349 LOGV("getDriftTimeUs: %lld us", mDriftTimeUs); 2350 Mutex::Autolock autolock(mLock); 2351 return mDriftTimeUs; 2352} 2353 2354bool MPEG4Writer::useNalLengthFour() { 2355 return mUse4ByteNalLength; 2356} 2357 2358void MPEG4Writer::Track::bufferChunk(int64_t timestampUs) { 2359 LOGV("bufferChunk"); 2360 2361 Chunk chunk(this, timestampUs, mChunkSamples); 2362 mOwner->bufferChunk(chunk); 2363 mChunkSamples.clear(); 2364} 2365 2366int64_t MPEG4Writer::Track::getDurationUs() const { 2367 return mTrackDurationUs; 2368} 2369 2370int64_t MPEG4Writer::Track::getEstimatedTrackSizeBytes() const { 2371 return mEstimatedTrackSizeBytes; 2372} 2373 2374status_t MPEG4Writer::Track::checkCodecSpecificData() const { 2375 const char *mime; 2376 CHECK(mMeta->findCString(kKeyMIMEType, &mime)); 2377 if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AAC, mime) || 2378 !strcasecmp(MEDIA_MIMETYPE_VIDEO_MPEG4, mime) || 2379 !strcasecmp(MEDIA_MIMETYPE_VIDEO_AVC, mime)) { 2380 if (!mCodecSpecificData || 2381 mCodecSpecificDataSize <= 0) { 2382 LOGE("Missing codec specific data"); 2383 return ERROR_MALFORMED; 2384 } 2385 } else { 2386 if (mCodecSpecificData || 2387 mCodecSpecificDataSize > 0) { 2388 LOGE("Unexepected codec specific data found"); 2389 return ERROR_MALFORMED; 2390 } 2391 } 2392 return OK; 2393} 2394 2395void MPEG4Writer::Track::writeTrackHeader(bool use32BitOffset) { 2396 2397 LOGV("%s track time scale: %d", 2398 mIsAudio? "Audio": "Video", mTimeScale); 2399 2400 time_t now = time(NULL); 2401 mOwner->beginBox("trak"); 2402 writeTkhdBox(now); 2403 mOwner->beginBox("mdia"); 2404 writeMdhdBox(now); 2405 writeHdlrBox(); 2406 mOwner->beginBox("minf"); 2407 if (mIsAudio) { 2408 writeSmhdBox(); 2409 } else { 2410 writeVmhdBox(); 2411 } 2412 writeDinfBox(); 2413 writeStblBox(use32BitOffset); 2414 mOwner->endBox(); // minf 2415 mOwner->endBox(); // mdia 2416 mOwner->endBox(); // trak 2417} 2418 2419void MPEG4Writer::Track::writeStblBox(bool use32BitOffset) { 2420 mOwner->beginBox("stbl"); 2421 mOwner->beginBox("stsd"); 2422 mOwner->writeInt32(0); // version=0, flags=0 2423 mOwner->writeInt32(1); // entry count 2424 if (mIsAudio) { 2425 writeAudioFourCCBox(); 2426 } else { 2427 writeVideoFourCCBox(); 2428 } 2429 mOwner->endBox(); // stsd 2430 writeSttsBox(); 2431 if (!mIsAudio) { 2432 writeStssBox(); 2433 } 2434 writeStszBox(); 2435 writeStscBox(); 2436 writeStcoBox(use32BitOffset); 2437 mOwner->endBox(); // stbl 2438} 2439 2440void MPEG4Writer::Track::writeVideoFourCCBox() { 2441 const char *mime; 2442 bool success = mMeta->findCString(kKeyMIMEType, &mime); 2443 CHECK(success); 2444 if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_MPEG4, mime)) { 2445 mOwner->beginBox("mp4v"); 2446 } else if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_H263, mime)) { 2447 mOwner->beginBox("s263"); 2448 } else if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_AVC, mime)) { 2449 mOwner->beginBox("avc1"); 2450 } else { 2451 LOGE("Unknown mime type '%s'.", mime); 2452 CHECK(!"should not be here, unknown mime type."); 2453 } 2454 2455 mOwner->writeInt32(0); // reserved 2456 mOwner->writeInt16(0); // reserved 2457 mOwner->writeInt16(1); // data ref index 2458 mOwner->writeInt16(0); // predefined 2459 mOwner->writeInt16(0); // reserved 2460 mOwner->writeInt32(0); // predefined 2461 mOwner->writeInt32(0); // predefined 2462 mOwner->writeInt32(0); // predefined 2463 2464 int32_t width, height; 2465 success = mMeta->findInt32(kKeyWidth, &width); 2466 success = success && mMeta->findInt32(kKeyHeight, &height); 2467 CHECK(success); 2468 2469 mOwner->writeInt16(width); 2470 mOwner->writeInt16(height); 2471 mOwner->writeInt32(0x480000); // horiz resolution 2472 mOwner->writeInt32(0x480000); // vert resolution 2473 mOwner->writeInt32(0); // reserved 2474 mOwner->writeInt16(1); // frame count 2475 mOwner->write(" ", 32); 2476 mOwner->writeInt16(0x18); // depth 2477 mOwner->writeInt16(-1); // predefined 2478 2479 CHECK(23 + mCodecSpecificDataSize < 128); 2480 2481 if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_MPEG4, mime)) { 2482 writeMp4vEsdsBox(); 2483 } else if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_H263, mime)) { 2484 writeD263Box(); 2485 } else if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_AVC, mime)) { 2486 writeAvccBox(); 2487 } 2488 2489 writePaspBox(); 2490 mOwner->endBox(); // mp4v, s263 or avc1 2491} 2492 2493void MPEG4Writer::Track::writeAudioFourCCBox() { 2494 const char *mime; 2495 bool success = mMeta->findCString(kKeyMIMEType, &mime); 2496 CHECK(success); 2497 const char *fourcc = NULL; 2498 if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AMR_NB, mime)) { 2499 fourcc = "samr"; 2500 } else if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AMR_WB, mime)) { 2501 fourcc = "sawb"; 2502 } else if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AAC, mime)) { 2503 fourcc = "mp4a"; 2504 } else { 2505 LOGE("Unknown mime type '%s'.", mime); 2506 CHECK(!"should not be here, unknown mime type."); 2507 } 2508 2509 mOwner->beginBox(fourcc); // audio format 2510 mOwner->writeInt32(0); // reserved 2511 mOwner->writeInt16(0); // reserved 2512 mOwner->writeInt16(0x1); // data ref index 2513 mOwner->writeInt32(0); // reserved 2514 mOwner->writeInt32(0); // reserved 2515 int32_t nChannels; 2516 CHECK_EQ(true, mMeta->findInt32(kKeyChannelCount, &nChannels)); 2517 mOwner->writeInt16(nChannels); // channel count 2518 mOwner->writeInt16(16); // sample size 2519 mOwner->writeInt16(0); // predefined 2520 mOwner->writeInt16(0); // reserved 2521 2522 int32_t samplerate; 2523 success = mMeta->findInt32(kKeySampleRate, &samplerate); 2524 CHECK(success); 2525 mOwner->writeInt32(samplerate << 16); 2526 if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AAC, mime)) { 2527 writeMp4aEsdsBox(); 2528 } else if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AMR_NB, mime) || 2529 !strcasecmp(MEDIA_MIMETYPE_AUDIO_AMR_WB, mime)) { 2530 writeDamrBox(); 2531 } 2532 mOwner->endBox(); 2533} 2534 2535void MPEG4Writer::Track::writeMp4aEsdsBox() { 2536 mOwner->beginBox("esds"); 2537 CHECK(mCodecSpecificData); 2538 CHECK(mCodecSpecificDataSize > 0); 2539 2540 // Make sure all sizes encode to a single byte. 2541 CHECK(mCodecSpecificDataSize + 23 < 128); 2542 2543 mOwner->writeInt32(0); // version=0, flags=0 2544 mOwner->writeInt8(0x03); // ES_DescrTag 2545 mOwner->writeInt8(23 + mCodecSpecificDataSize); 2546 mOwner->writeInt16(0x0000);// ES_ID 2547 mOwner->writeInt8(0x00); 2548 2549 mOwner->writeInt8(0x04); // DecoderConfigDescrTag 2550 mOwner->writeInt8(15 + mCodecSpecificDataSize); 2551 mOwner->writeInt8(0x40); // objectTypeIndication ISO/IEC 14492-2 2552 mOwner->writeInt8(0x15); // streamType AudioStream 2553 2554 mOwner->writeInt16(0x03); // XXX 2555 mOwner->writeInt8(0x00); // buffer size 24-bit 2556 mOwner->writeInt32(96000); // max bit rate 2557 mOwner->writeInt32(96000); // avg bit rate 2558 2559 mOwner->writeInt8(0x05); // DecoderSpecificInfoTag 2560 mOwner->writeInt8(mCodecSpecificDataSize); 2561 mOwner->write(mCodecSpecificData, mCodecSpecificDataSize); 2562 2563 static const uint8_t kData2[] = { 2564 0x06, // SLConfigDescriptorTag 2565 0x01, 2566 0x02 2567 }; 2568 mOwner->write(kData2, sizeof(kData2)); 2569 2570 mOwner->endBox(); // esds 2571} 2572 2573void MPEG4Writer::Track::writeMp4vEsdsBox() { 2574 CHECK(mCodecSpecificData); 2575 CHECK(mCodecSpecificDataSize > 0); 2576 mOwner->beginBox("esds"); 2577 2578 mOwner->writeInt32(0); // version=0, flags=0 2579 2580 mOwner->writeInt8(0x03); // ES_DescrTag 2581 mOwner->writeInt8(23 + mCodecSpecificDataSize); 2582 mOwner->writeInt16(0x0000); // ES_ID 2583 mOwner->writeInt8(0x1f); 2584 2585 mOwner->writeInt8(0x04); // DecoderConfigDescrTag 2586 mOwner->writeInt8(15 + mCodecSpecificDataSize); 2587 mOwner->writeInt8(0x20); // objectTypeIndication ISO/IEC 14492-2 2588 mOwner->writeInt8(0x11); // streamType VisualStream 2589 2590 static const uint8_t kData[] = { 2591 0x01, 0x77, 0x00, 2592 0x00, 0x03, 0xe8, 0x00, 2593 0x00, 0x03, 0xe8, 0x00 2594 }; 2595 mOwner->write(kData, sizeof(kData)); 2596 2597 mOwner->writeInt8(0x05); // DecoderSpecificInfoTag 2598 2599 mOwner->writeInt8(mCodecSpecificDataSize); 2600 mOwner->write(mCodecSpecificData, mCodecSpecificDataSize); 2601 2602 static const uint8_t kData2[] = { 2603 0x06, // SLConfigDescriptorTag 2604 0x01, 2605 0x02 2606 }; 2607 mOwner->write(kData2, sizeof(kData2)); 2608 2609 mOwner->endBox(); // esds 2610} 2611 2612void MPEG4Writer::Track::writeTkhdBox(time_t now) { 2613 mOwner->beginBox("tkhd"); 2614 // Flags = 7 to indicate that the track is enabled, and 2615 // part of the presentation 2616 mOwner->writeInt32(0x07); // version=0, flags=7 2617 mOwner->writeInt32(now); // creation time 2618 mOwner->writeInt32(now); // modification time 2619 mOwner->writeInt32(mTrackId + 1); // track id starts with 1 2620 mOwner->writeInt32(0); // reserved 2621 int64_t trakDurationUs = getDurationUs(); 2622 int32_t mvhdTimeScale = mOwner->getTimeScale(); 2623 int32_t tkhdDuration = 2624 (trakDurationUs * mvhdTimeScale + 5E5) / 1E6; 2625 mOwner->writeInt32(tkhdDuration); // in mvhd timescale 2626 mOwner->writeInt32(0); // reserved 2627 mOwner->writeInt32(0); // reserved 2628 mOwner->writeInt16(0); // layer 2629 mOwner->writeInt16(0); // alternate group 2630 mOwner->writeInt16(mIsAudio ? 0x100 : 0); // volume 2631 mOwner->writeInt16(0); // reserved 2632 2633 mOwner->writeCompositionMatrix(mRotation); // matrix 2634 2635 if (mIsAudio) { 2636 mOwner->writeInt32(0); 2637 mOwner->writeInt32(0); 2638 } else { 2639 int32_t width, height; 2640 bool success = mMeta->findInt32(kKeyWidth, &width); 2641 success = success && mMeta->findInt32(kKeyHeight, &height); 2642 CHECK(success); 2643 2644 mOwner->writeInt32(width << 16); // 32-bit fixed-point value 2645 mOwner->writeInt32(height << 16); // 32-bit fixed-point value 2646 } 2647 mOwner->endBox(); // tkhd 2648} 2649 2650void MPEG4Writer::Track::writeVmhdBox() { 2651 mOwner->beginBox("vmhd"); 2652 mOwner->writeInt32(0x01); // version=0, flags=1 2653 mOwner->writeInt16(0); // graphics mode 2654 mOwner->writeInt16(0); // opcolor 2655 mOwner->writeInt16(0); 2656 mOwner->writeInt16(0); 2657 mOwner->endBox(); 2658} 2659 2660void MPEG4Writer::Track::writeSmhdBox() { 2661 mOwner->beginBox("smhd"); 2662 mOwner->writeInt32(0); // version=0, flags=0 2663 mOwner->writeInt16(0); // balance 2664 mOwner->writeInt16(0); // reserved 2665 mOwner->endBox(); 2666} 2667 2668void MPEG4Writer::Track::writeHdlrBox() { 2669 mOwner->beginBox("hdlr"); 2670 mOwner->writeInt32(0); // version=0, flags=0 2671 mOwner->writeInt32(0); // component type: should be mhlr 2672 mOwner->writeFourcc(mIsAudio ? "soun" : "vide"); // component subtype 2673 mOwner->writeInt32(0); // reserved 2674 mOwner->writeInt32(0); // reserved 2675 mOwner->writeInt32(0); // reserved 2676 // Removing "r" for the name string just makes the string 4 byte aligned 2677 mOwner->writeCString(mIsAudio ? "SoundHandle": "VideoHandle"); // name 2678 mOwner->endBox(); 2679} 2680 2681void MPEG4Writer::Track::writeMdhdBox(time_t now) { 2682 int64_t trakDurationUs = getDurationUs(); 2683 mOwner->beginBox("mdhd"); 2684 mOwner->writeInt32(0); // version=0, flags=0 2685 mOwner->writeInt32(now); // creation time 2686 mOwner->writeInt32(now); // modification time 2687 mOwner->writeInt32(mTimeScale); // media timescale 2688 int32_t mdhdDuration = (trakDurationUs * mTimeScale + 5E5) / 1E6; 2689 mOwner->writeInt32(mdhdDuration); // use media timescale 2690 // Language follows the three letter standard ISO-639-2/T 2691 // 'e', 'n', 'g' for "English", for instance. 2692 // Each character is packed as the difference between its ASCII value and 0x60. 2693 // For "English", these are 00101, 01110, 00111. 2694 // XXX: Where is the padding bit located: 0x15C7? 2695 mOwner->writeInt16(0); // language code 2696 mOwner->writeInt16(0); // predefined 2697 mOwner->endBox(); 2698} 2699 2700void MPEG4Writer::Track::writeDamrBox() { 2701 // 3gpp2 Spec AMRSampleEntry fields 2702 mOwner->beginBox("damr"); 2703 mOwner->writeCString(" "); // vendor: 4 bytes 2704 mOwner->writeInt8(0); // decoder version 2705 mOwner->writeInt16(0x83FF); // mode set: all enabled 2706 mOwner->writeInt8(0); // mode change period 2707 mOwner->writeInt8(1); // frames per sample 2708 mOwner->endBox(); 2709} 2710 2711void MPEG4Writer::Track::writeUrlBox() { 2712 // The table index here refers to the sample description index 2713 // in the sample table entries. 2714 mOwner->beginBox("url "); 2715 mOwner->writeInt32(1); // version=0, flags=1 (self-contained) 2716 mOwner->endBox(); // url 2717} 2718 2719void MPEG4Writer::Track::writeDrefBox() { 2720 mOwner->beginBox("dref"); 2721 mOwner->writeInt32(0); // version=0, flags=0 2722 mOwner->writeInt32(1); // entry count (either url or urn) 2723 writeUrlBox(); 2724 mOwner->endBox(); // dref 2725} 2726 2727void MPEG4Writer::Track::writeDinfBox() { 2728 mOwner->beginBox("dinf"); 2729 writeDrefBox(); 2730 mOwner->endBox(); // dinf 2731} 2732 2733void MPEG4Writer::Track::writeAvccBox() { 2734 CHECK(mCodecSpecificData); 2735 CHECK(mCodecSpecificDataSize >= 5); 2736 2737 // Patch avcc's lengthSize field to match the number 2738 // of bytes we use to indicate the size of a nal unit. 2739 uint8_t *ptr = (uint8_t *)mCodecSpecificData; 2740 ptr[4] = (ptr[4] & 0xfc) | (mOwner->useNalLengthFour() ? 3 : 1); 2741 mOwner->beginBox("avcC"); 2742 mOwner->write(mCodecSpecificData, mCodecSpecificDataSize); 2743 mOwner->endBox(); // avcC 2744} 2745 2746void MPEG4Writer::Track::writeD263Box() { 2747 mOwner->beginBox("d263"); 2748 mOwner->writeInt32(0); // vendor 2749 mOwner->writeInt8(0); // decoder version 2750 mOwner->writeInt8(10); // level: 10 2751 mOwner->writeInt8(0); // profile: 0 2752 mOwner->endBox(); // d263 2753} 2754 2755// This is useful if the pixel is not square 2756void MPEG4Writer::Track::writePaspBox() { 2757 mOwner->beginBox("pasp"); 2758 mOwner->writeInt32(1 << 16); // hspacing 2759 mOwner->writeInt32(1 << 16); // vspacing 2760 mOwner->endBox(); // pasp 2761} 2762 2763void MPEG4Writer::Track::writeSttsBox() { 2764 mOwner->beginBox("stts"); 2765 mOwner->writeInt32(0); // version=0, flags=0 2766 mOwner->writeInt32(mNumSttsTableEntries); 2767 2768 // Compensate for small start time difference from different media tracks 2769 int64_t trackStartTimeOffsetUs = 0; 2770 int64_t moovStartTimeUs = mOwner->getStartTimestampUs(); 2771 if (mStartTimestampUs != moovStartTimeUs) { 2772 CHECK(mStartTimestampUs > moovStartTimeUs); 2773 trackStartTimeOffsetUs = mStartTimestampUs - moovStartTimeUs; 2774 } 2775 int64_t prevTimestampUs = trackStartTimeOffsetUs; 2776 for (List<SttsTableEntry>::iterator it = mSttsTableEntries.begin(); 2777 it != mSttsTableEntries.end(); ++it) { 2778 mOwner->writeInt32(it->sampleCount); 2779 2780 // Make sure that we are calculating the sample duration the exactly 2781 // same way as we made decision on how to create stts entries. 2782 int64_t currTimestampUs = prevTimestampUs + it->sampleDurationUs; 2783 int32_t dur = ((currTimestampUs * mTimeScale + 500000LL) / 1000000LL - 2784 (prevTimestampUs * mTimeScale + 500000LL) / 1000000LL); 2785 prevTimestampUs += (it->sampleCount * it->sampleDurationUs); 2786 2787 mOwner->writeInt32(dur); 2788 } 2789 mOwner->endBox(); // stts 2790} 2791 2792void MPEG4Writer::Track::writeStssBox() { 2793 mOwner->beginBox("stss"); 2794 mOwner->writeInt32(0); // version=0, flags=0 2795 mOwner->writeInt32(mNumStssTableEntries); // number of sync frames 2796 for (List<int32_t>::iterator it = mStssTableEntries.begin(); 2797 it != mStssTableEntries.end(); ++it) { 2798 mOwner->writeInt32(*it); 2799 } 2800 mOwner->endBox(); // stss 2801} 2802 2803void MPEG4Writer::Track::writeStszBox() { 2804 mOwner->beginBox("stsz"); 2805 mOwner->writeInt32(0); // version=0, flags=0 2806 if (mSamplesHaveSameSize) { 2807 List<size_t>::iterator it = mSampleSizes.begin(); 2808 mOwner->writeInt32(*it); // default sample size 2809 } else { 2810 mOwner->writeInt32(0); 2811 } 2812 mOwner->writeInt32(mNumSamples); 2813 if (!mSamplesHaveSameSize) { 2814 for (List<size_t>::iterator it = mSampleSizes.begin(); 2815 it != mSampleSizes.end(); ++it) { 2816 mOwner->writeInt32(*it); 2817 } 2818 } 2819 mOwner->endBox(); // stsz 2820} 2821 2822void MPEG4Writer::Track::writeStscBox() { 2823 mOwner->beginBox("stsc"); 2824 mOwner->writeInt32(0); // version=0, flags=0 2825 mOwner->writeInt32(mNumStscTableEntries); 2826 for (List<StscTableEntry>::iterator it = mStscTableEntries.begin(); 2827 it != mStscTableEntries.end(); ++it) { 2828 mOwner->writeInt32(it->firstChunk); 2829 mOwner->writeInt32(it->samplesPerChunk); 2830 mOwner->writeInt32(it->sampleDescriptionId); 2831 } 2832 mOwner->endBox(); // stsc 2833} 2834 2835void MPEG4Writer::Track::writeStcoBox(bool use32BitOffset) { 2836 mOwner->beginBox(use32BitOffset? "stco": "co64"); 2837 mOwner->writeInt32(0); // version=0, flags=0 2838 mOwner->writeInt32(mNumStcoTableEntries); 2839 for (List<off64_t>::iterator it = mChunkOffsets.begin(); 2840 it != mChunkOffsets.end(); ++it) { 2841 if (use32BitOffset) { 2842 mOwner->writeInt32(static_cast<int32_t>(*it)); 2843 } else { 2844 mOwner->writeInt64((*it)); 2845 } 2846 } 2847 mOwner->endBox(); // stco or co64 2848} 2849 2850void MPEG4Writer::writeUdtaBox() { 2851 beginBox("udta"); 2852 writeGeoDataBox(); 2853 endBox(); 2854} 2855 2856/* 2857 * Geodata is stored according to ISO-6709 standard. 2858 */ 2859void MPEG4Writer::writeGeoDataBox() { 2860 beginBox("\xA9xyz"); 2861 /* 2862 * For historical reasons, any user data start 2863 * with "\0xA9", must be followed by its assoicated 2864 * language code. 2865 * 0x0012: text string length 2866 * 0x15c7: lang (locale) code: en 2867 */ 2868 writeInt32(0x001215c7); 2869 writeLatitude(mLatitudex10000); 2870 writeLongitude(mLongitudex10000); 2871 writeInt8(0x2F); 2872 endBox(); 2873} 2874 2875} // namespace android 2876