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 26 #include <media/stagefright/MPEG4Writer.h> 27 #include <media/stagefright/MediaBuffer.h> 28 #include <media/stagefright/MetaData.h> 29 #include <media/stagefright/MediaDebug.h> 30 #include <media/stagefright/MediaDefs.h> 31 #include <media/stagefright/MediaErrors.h> 32 #include <media/stagefright/MediaSource.h> 33 #include <media/stagefright/Utils.h> 34 #include <media/mediarecorder.h> 35 #include <cutils/properties.h> 36 #include <sys/types.h> 37 #include <sys/stat.h> 38 #include <fcntl.h> 39 #include <unistd.h> 40 41 #include "include/ESDS.h" 42 43 namespace android { 44 45 static const int64_t kMax32BitFileSize = 0x007fffffffLL; 46 static const uint8_t kNalUnitTypeSeqParamSet = 0x07; 47 static const uint8_t kNalUnitTypePicParamSet = 0x08; 48 static const int64_t kInitialDelayTimeUs = 700000LL; 49 50 class MPEG4Writer::Track { 51 public: 52 Track(MPEG4Writer *owner, const sp<MediaSource> &source, size_t trackId); 53 54 ~Track(); 55 56 status_t start(MetaData *params); 57 status_t stop(); 58 status_t pause(); 59 bool reachedEOS(); 60 61 int64_t getDurationUs() const; 62 int64_t getEstimatedTrackSizeBytes() const; 63 void writeTrackHeader(bool use32BitOffset = true); 64 void bufferChunk(int64_t timestampUs); 65 bool isAvc() const { return mIsAvc; } 66 bool isAudio() const { return mIsAudio; } 67 bool isMPEG4() const { return mIsMPEG4; } 68 void addChunkOffset(off64_t offset); 69 int32_t getTrackId() const { return mTrackId; } 70 status_t dump(int fd, const Vector<String16>& args) const; 71 72 private: 73 MPEG4Writer *mOwner; 74 sp<MetaData> mMeta; 75 sp<MediaSource> mSource; 76 volatile bool mDone; 77 volatile bool mPaused; 78 volatile bool mResumed; 79 volatile bool mStarted; 80 bool mIsAvc; 81 bool mIsAudio; 82 bool mIsMPEG4; 83 int32_t mTrackId; 84 int64_t mTrackDurationUs; 85 int64_t mMaxChunkDurationUs; 86 87 bool mIsRealTimeRecording; 88 int64_t mMaxTimeStampUs; 89 int64_t mEstimatedTrackSizeBytes; 90 int64_t mMdatSizeBytes; 91 int32_t mTimeScale; 92 93 pthread_t mThread; 94 95 // mNumSamples is used to track how many samples in mSampleSizes List. 96 // This is to reduce the cost associated with mSampleSizes.size() call, 97 // since it is O(n). Ideally, the fix should be in List class. 98 size_t mNumSamples; 99 List<size_t> mSampleSizes; 100 bool mSamplesHaveSameSize; 101 102 List<MediaBuffer *> mChunkSamples; 103 104 size_t mNumStcoTableEntries; 105 List<off64_t> mChunkOffsets; 106 107 size_t mNumStscTableEntries; 108 struct StscTableEntry { 109 110 StscTableEntry(uint32_t chunk, uint32_t samples, uint32_t id) 111 : firstChunk(chunk), 112 samplesPerChunk(samples), 113 sampleDescriptionId(id) {} 114 115 uint32_t firstChunk; 116 uint32_t samplesPerChunk; 117 uint32_t sampleDescriptionId; 118 }; 119 List<StscTableEntry> mStscTableEntries; 120 121 size_t mNumStssTableEntries; 122 List<int32_t> mStssTableEntries; 123 124 struct SttsTableEntry { 125 126 SttsTableEntry(uint32_t count, uint32_t duration) 127 : sampleCount(count), sampleDuration(duration) {} 128 129 uint32_t sampleCount; 130 uint32_t sampleDuration; // time scale based 131 }; 132 size_t mNumSttsTableEntries; 133 List<SttsTableEntry> mSttsTableEntries; 134 135 struct CttsTableEntry { 136 CttsTableEntry(uint32_t count, int32_t timescaledDur) 137 : sampleCount(count), sampleDuration(timescaledDur) {} 138 139 uint32_t sampleCount; 140 int32_t sampleDuration; // time scale based 141 }; 142 bool mHasNegativeCttsDeltaDuration; 143 size_t mNumCttsTableEntries; 144 List<CttsTableEntry> mCttsTableEntries; 145 146 // Sequence parameter set or picture parameter set 147 struct AVCParamSet { 148 AVCParamSet(uint16_t length, const uint8_t *data) 149 : mLength(length), mData(data) {} 150 151 uint16_t mLength; 152 const uint8_t *mData; 153 }; 154 List<AVCParamSet> mSeqParamSets; 155 List<AVCParamSet> mPicParamSets; 156 uint8_t mProfileIdc; 157 uint8_t mProfileCompatible; 158 uint8_t mLevelIdc; 159 160 void *mCodecSpecificData; 161 size_t mCodecSpecificDataSize; 162 bool mGotAllCodecSpecificData; 163 bool mTrackingProgressStatus; 164 165 bool mReachedEOS; 166 int64_t mStartTimestampUs; 167 int64_t mStartTimeRealUs; 168 int64_t mFirstSampleTimeRealUs; 169 int64_t mPreviousTrackTimeUs; 170 int64_t mTrackEveryTimeDurationUs; 171 172 // Update the audio track's drift information. 173 void updateDriftTime(const sp<MetaData>& meta); 174 175 static void *ThreadWrapper(void *me); 176 status_t threadEntry(); 177 178 const uint8_t *parseParamSet( 179 const uint8_t *data, size_t length, int type, size_t *paramSetLen); 180 181 status_t makeAVCCodecSpecificData(const uint8_t *data, size_t size); 182 status_t copyAVCCodecSpecificData(const uint8_t *data, size_t size); 183 status_t parseAVCCodecSpecificData(const uint8_t *data, size_t size); 184 185 // Track authoring progress status 186 void trackProgressStatus(int64_t timeUs, status_t err = OK); 187 void initTrackingProgressStatus(MetaData *params); 188 189 void getCodecSpecificDataFromInputFormatIfPossible(); 190 191 // Determine the track time scale 192 // If it is an audio track, try to use the sampling rate as 193 // the time scale; however, if user chooses the overwrite 194 // value, the user-supplied time scale will be used. 195 void setTimeScale(); 196 197 // Simple validation on the codec specific data 198 status_t checkCodecSpecificData() const; 199 int32_t mRotation; 200 201 void updateTrackSizeEstimate(); 202 void addOneStscTableEntry(size_t chunkId, size_t sampleId); 203 void addOneStssTableEntry(size_t sampleId); 204 205 // Duration is time scale based 206 void addOneSttsTableEntry(size_t sampleCount, int32_t timescaledDur); 207 void addOneCttsTableEntry(size_t sampleCount, int32_t timescaledDur); 208 209 bool isTrackMalFormed() const; 210 void sendTrackSummary(bool hasMultipleTracks); 211 212 // Write the boxes 213 void writeStcoBox(bool use32BitOffset); 214 void writeStscBox(); 215 void writeStszBox(); 216 void writeStssBox(); 217 void writeSttsBox(); 218 void writeCttsBox(); 219 void writeD263Box(); 220 void writePaspBox(); 221 void writeAvccBox(); 222 void writeUrlBox(); 223 void writeDrefBox(); 224 void writeDinfBox(); 225 void writeDamrBox(); 226 void writeMdhdBox(time_t now); 227 void writeSmhdBox(); 228 void writeVmhdBox(); 229 void writeHdlrBox(); 230 void writeTkhdBox(time_t now); 231 void writeMp4aEsdsBox(); 232 void writeMp4vEsdsBox(); 233 void writeAudioFourCCBox(); 234 void writeVideoFourCCBox(); 235 void writeStblBox(bool use32BitOffset); 236 237 Track(const Track &); 238 Track &operator=(const Track &); 239 }; 240 241 MPEG4Writer::MPEG4Writer(const char *filename) 242 : mFd(-1), 243 mInitCheck(NO_INIT), 244 mUse4ByteNalLength(true), 245 mUse32BitOffset(true), 246 mIsFileSizeLimitExplicitlyRequested(false), 247 mPaused(false), 248 mStarted(false), 249 mWriterThreadStarted(false), 250 mOffset(0), 251 mMdatOffset(0), 252 mEstimatedMoovBoxSize(0), 253 mInterleaveDurationUs(1000000), 254 mLatitudex10000(0), 255 mLongitudex10000(0), 256 mAreGeoTagsAvailable(false), 257 mStartTimeOffsetMs(-1) { 258 259 mFd = open(filename, O_CREAT | O_LARGEFILE | O_TRUNC | O_RDWR); 260 if (mFd >= 0) { 261 mInitCheck = OK; 262 } 263 } 264 265 MPEG4Writer::MPEG4Writer(int fd) 266 : mFd(dup(fd)), 267 mInitCheck(mFd < 0? NO_INIT: OK), 268 mUse4ByteNalLength(true), 269 mUse32BitOffset(true), 270 mIsFileSizeLimitExplicitlyRequested(false), 271 mPaused(false), 272 mStarted(false), 273 mWriterThreadStarted(false), 274 mOffset(0), 275 mMdatOffset(0), 276 mEstimatedMoovBoxSize(0), 277 mInterleaveDurationUs(1000000), 278 mLatitudex10000(0), 279 mLongitudex10000(0), 280 mAreGeoTagsAvailable(false), 281 mStartTimeOffsetMs(-1) { 282 } 283 284 MPEG4Writer::~MPEG4Writer() { 285 stop(); 286 287 while (!mTracks.empty()) { 288 List<Track *>::iterator it = mTracks.begin(); 289 delete *it; 290 (*it) = NULL; 291 mTracks.erase(it); 292 } 293 mTracks.clear(); 294 } 295 296 status_t MPEG4Writer::dump( 297 int fd, const Vector<String16>& args) { 298 const size_t SIZE = 256; 299 char buffer[SIZE]; 300 String8 result; 301 snprintf(buffer, SIZE, " MPEG4Writer %p\n", this); 302 result.append(buffer); 303 snprintf(buffer, SIZE, " mStarted: %s\n", mStarted? "true": "false"); 304 result.append(buffer); 305 ::write(fd, result.string(), result.size()); 306 for (List<Track *>::iterator it = mTracks.begin(); 307 it != mTracks.end(); ++it) { 308 (*it)->dump(fd, args); 309 } 310 return OK; 311 } 312 313 status_t MPEG4Writer::Track::dump( 314 int fd, const Vector<String16>& args) const { 315 const size_t SIZE = 256; 316 char buffer[SIZE]; 317 String8 result; 318 snprintf(buffer, SIZE, " %s track\n", mIsAudio? "Audio": "Video"); 319 result.append(buffer); 320 snprintf(buffer, SIZE, " reached EOS: %s\n", 321 mReachedEOS? "true": "false"); 322 result.append(buffer); 323 ::write(fd, result.string(), result.size()); 324 return OK; 325 } 326 327 status_t MPEG4Writer::addSource(const sp<MediaSource> &source) { 328 Mutex::Autolock l(mLock); 329 if (mStarted) { 330 LOGE("Attempt to add source AFTER recording is started"); 331 return UNKNOWN_ERROR; 332 } 333 Track *track = new Track(this, source, mTracks.size()); 334 mTracks.push_back(track); 335 336 return OK; 337 } 338 339 status_t MPEG4Writer::startTracks(MetaData *params) { 340 for (List<Track *>::iterator it = mTracks.begin(); 341 it != mTracks.end(); ++it) { 342 status_t err = (*it)->start(params); 343 344 if (err != OK) { 345 for (List<Track *>::iterator it2 = mTracks.begin(); 346 it2 != it; ++it2) { 347 (*it2)->stop(); 348 } 349 350 return err; 351 } 352 } 353 return OK; 354 } 355 356 int64_t MPEG4Writer::estimateMoovBoxSize(int32_t bitRate) { 357 // This implementation is highly experimental/heurisitic. 358 // 359 // Statistical analysis shows that metadata usually accounts 360 // for a small portion of the total file size, usually < 0.6%. 361 362 // The default MIN_MOOV_BOX_SIZE is set to 0.6% x 1MB / 2, 363 // where 1MB is the common file size limit for MMS application. 364 // The default MAX _MOOV_BOX_SIZE value is based on about 3 365 // minute video recording with a bit rate about 3 Mbps, because 366 // statistics also show that most of the video captured are going 367 // to be less than 3 minutes. 368 369 // If the estimation is wrong, we will pay the price of wasting 370 // some reserved space. This should not happen so often statistically. 371 static const int32_t factor = mUse32BitOffset? 1: 2; 372 static const int64_t MIN_MOOV_BOX_SIZE = 3 * 1024; // 3 KB 373 static const int64_t MAX_MOOV_BOX_SIZE = (180 * 3000000 * 6LL / 8000); 374 int64_t size = MIN_MOOV_BOX_SIZE; 375 376 // Max file size limit is set 377 if (mMaxFileSizeLimitBytes != 0 && mIsFileSizeLimitExplicitlyRequested) { 378 size = mMaxFileSizeLimitBytes * 6 / 1000; 379 } 380 381 // Max file duration limit is set 382 if (mMaxFileDurationLimitUs != 0) { 383 if (bitRate > 0) { 384 int64_t size2 = 385 ((mMaxFileDurationLimitUs * bitRate * 6) / 1000 / 8000000); 386 if (mMaxFileSizeLimitBytes != 0 && mIsFileSizeLimitExplicitlyRequested) { 387 // When both file size and duration limits are set, 388 // we use the smaller limit of the two. 389 if (size > size2) { 390 size = size2; 391 } 392 } else { 393 // Only max file duration limit is set 394 size = size2; 395 } 396 } 397 } 398 399 if (size < MIN_MOOV_BOX_SIZE) { 400 size = MIN_MOOV_BOX_SIZE; 401 } 402 403 // Any long duration recording will be probably end up with 404 // non-streamable mp4 file. 405 if (size > MAX_MOOV_BOX_SIZE) { 406 size = MAX_MOOV_BOX_SIZE; 407 } 408 409 LOGI("limits: %lld/%lld bytes/us, bit rate: %d bps and the estimated" 410 " moov size %lld bytes", 411 mMaxFileSizeLimitBytes, mMaxFileDurationLimitUs, bitRate, size); 412 return factor * size; 413 } 414 415 status_t MPEG4Writer::start(MetaData *param) { 416 if (mInitCheck != OK) { 417 return UNKNOWN_ERROR; 418 } 419 420 /* 421 * Check mMaxFileSizeLimitBytes at the beginning 422 * since mMaxFileSizeLimitBytes may be implicitly 423 * changed later for 32-bit file offset even if 424 * user does not ask to set it explicitly. 425 */ 426 if (mMaxFileSizeLimitBytes != 0) { 427 mIsFileSizeLimitExplicitlyRequested = true; 428 } 429 430 int32_t use64BitOffset; 431 if (param && 432 param->findInt32(kKey64BitFileOffset, &use64BitOffset) && 433 use64BitOffset) { 434 mUse32BitOffset = false; 435 } 436 437 if (mUse32BitOffset) { 438 // Implicit 32 bit file size limit 439 if (mMaxFileSizeLimitBytes == 0) { 440 mMaxFileSizeLimitBytes = kMax32BitFileSize; 441 } 442 443 // If file size is set to be larger than the 32 bit file 444 // size limit, treat it as an error. 445 if (mMaxFileSizeLimitBytes > kMax32BitFileSize) { 446 LOGW("32-bit file size limit (%lld bytes) too big. " 447 "It is changed to %lld bytes", 448 mMaxFileSizeLimitBytes, kMax32BitFileSize); 449 mMaxFileSizeLimitBytes = kMax32BitFileSize; 450 } 451 } 452 453 int32_t use2ByteNalLength; 454 if (param && 455 param->findInt32(kKey2ByteNalLength, &use2ByteNalLength) && 456 use2ByteNalLength) { 457 mUse4ByteNalLength = false; 458 } 459 460 mStartTimestampUs = -1; 461 462 if (mStarted) { 463 if (mPaused) { 464 mPaused = false; 465 return startTracks(param); 466 } 467 return OK; 468 } 469 470 if (!param || 471 !param->findInt32(kKeyTimeScale, &mTimeScale)) { 472 mTimeScale = 1000; 473 } 474 CHECK(mTimeScale > 0); 475 LOGV("movie time scale: %d", mTimeScale); 476 477 mStreamableFile = true; 478 mWriteMoovBoxToMemory = false; 479 mMoovBoxBuffer = NULL; 480 mMoovBoxBufferOffset = 0; 481 482 writeFtypBox(param); 483 484 mFreeBoxOffset = mOffset; 485 486 if (mEstimatedMoovBoxSize == 0) { 487 int32_t bitRate = -1; 488 if (param) { 489 param->findInt32(kKeyBitRate, &bitRate); 490 } 491 mEstimatedMoovBoxSize = estimateMoovBoxSize(bitRate); 492 } 493 CHECK(mEstimatedMoovBoxSize >= 8); 494 lseek64(mFd, mFreeBoxOffset, SEEK_SET); 495 writeInt32(mEstimatedMoovBoxSize); 496 write("free", 4); 497 498 mMdatOffset = mFreeBoxOffset + mEstimatedMoovBoxSize; 499 mOffset = mMdatOffset; 500 lseek64(mFd, mMdatOffset, SEEK_SET); 501 if (mUse32BitOffset) { 502 write("????mdat", 8); 503 } else { 504 write("\x00\x00\x00\x01mdat????????", 16); 505 } 506 507 status_t err = startWriterThread(); 508 if (err != OK) { 509 return err; 510 } 511 512 err = startTracks(param); 513 if (err != OK) { 514 return err; 515 } 516 517 mStarted = true; 518 return OK; 519 } 520 521 bool MPEG4Writer::use32BitFileOffset() const { 522 return mUse32BitOffset; 523 } 524 525 status_t MPEG4Writer::pause() { 526 if (mInitCheck != OK) { 527 return OK; 528 } 529 mPaused = true; 530 status_t err = OK; 531 for (List<Track *>::iterator it = mTracks.begin(); 532 it != mTracks.end(); ++it) { 533 status_t status = (*it)->pause(); 534 if (status != OK) { 535 err = status; 536 } 537 } 538 return err; 539 } 540 541 void MPEG4Writer::stopWriterThread() { 542 LOGD("Stopping writer thread"); 543 if (!mWriterThreadStarted) { 544 return; 545 } 546 547 { 548 Mutex::Autolock autolock(mLock); 549 550 mDone = true; 551 mChunkReadyCondition.signal(); 552 } 553 554 void *dummy; 555 pthread_join(mThread, &dummy); 556 mWriterThreadStarted = false; 557 LOGD("Writer thread stopped"); 558 } 559 560 /* 561 * MP4 file standard defines a composition matrix: 562 * | a b u | 563 * | c d v | 564 * | x y w | 565 * 566 * the element in the matrix is stored in the following 567 * order: {a, b, u, c, d, v, x, y, w}, 568 * where a, b, c, d, x, and y is in 16.16 format, while 569 * u, v and w is in 2.30 format. 570 */ 571 void MPEG4Writer::writeCompositionMatrix(int degrees) { 572 LOGV("writeCompositionMatrix"); 573 uint32_t a = 0x00010000; 574 uint32_t b = 0; 575 uint32_t c = 0; 576 uint32_t d = 0x00010000; 577 switch (degrees) { 578 case 0: 579 break; 580 case 90: 581 a = 0; 582 b = 0x00010000; 583 c = 0xFFFF0000; 584 d = 0; 585 break; 586 case 180: 587 a = 0xFFFF0000; 588 d = 0xFFFF0000; 589 break; 590 case 270: 591 a = 0; 592 b = 0xFFFF0000; 593 c = 0x00010000; 594 d = 0; 595 break; 596 default: 597 CHECK(!"Should never reach this unknown rotation"); 598 break; 599 } 600 601 writeInt32(a); // a 602 writeInt32(b); // b 603 writeInt32(0); // u 604 writeInt32(c); // c 605 writeInt32(d); // d 606 writeInt32(0); // v 607 writeInt32(0); // x 608 writeInt32(0); // y 609 writeInt32(0x40000000); // w 610 } 611 612 void MPEG4Writer::release() { 613 close(mFd); 614 mFd = -1; 615 mInitCheck = NO_INIT; 616 mStarted = false; 617 } 618 619 status_t MPEG4Writer::stop() { 620 if (mInitCheck != OK) { 621 return OK; 622 } else { 623 if (!mWriterThreadStarted || 624 !mStarted) { 625 if (mWriterThreadStarted) { 626 stopWriterThread(); 627 } 628 release(); 629 return OK; 630 } 631 } 632 633 status_t err = OK; 634 int64_t maxDurationUs = 0; 635 int64_t minDurationUs = 0x7fffffffffffffffLL; 636 for (List<Track *>::iterator it = mTracks.begin(); 637 it != mTracks.end(); ++it) { 638 status_t status = (*it)->stop(); 639 if (err == OK && status != OK) { 640 err = status; 641 } 642 643 int64_t durationUs = (*it)->getDurationUs(); 644 if (durationUs > maxDurationUs) { 645 maxDurationUs = durationUs; 646 } 647 if (durationUs < minDurationUs) { 648 minDurationUs = durationUs; 649 } 650 } 651 652 if (mTracks.size() > 1) { 653 LOGD("Duration from tracks range is [%lld, %lld] us", 654 minDurationUs, maxDurationUs); 655 } 656 657 stopWriterThread(); 658 659 // Do not write out movie header on error. 660 if (err != OK) { 661 release(); 662 return err; 663 } 664 665 // Fix up the size of the 'mdat' chunk. 666 if (mUse32BitOffset) { 667 lseek64(mFd, mMdatOffset, SEEK_SET); 668 int32_t size = htonl(static_cast<int32_t>(mOffset - mMdatOffset)); 669 ::write(mFd, &size, 4); 670 } else { 671 lseek64(mFd, mMdatOffset + 8, SEEK_SET); 672 int64_t size = mOffset - mMdatOffset; 673 size = hton64(size); 674 ::write(mFd, &size, 8); 675 } 676 lseek64(mFd, mOffset, SEEK_SET); 677 678 const off64_t moovOffset = mOffset; 679 mWriteMoovBoxToMemory = true; 680 mMoovBoxBuffer = (uint8_t *) malloc(mEstimatedMoovBoxSize); 681 mMoovBoxBufferOffset = 0; 682 CHECK(mMoovBoxBuffer != NULL); 683 writeMoovBox(maxDurationUs); 684 685 mWriteMoovBoxToMemory = false; 686 if (mStreamableFile) { 687 CHECK(mMoovBoxBufferOffset + 8 <= mEstimatedMoovBoxSize); 688 689 // Moov box 690 lseek64(mFd, mFreeBoxOffset, SEEK_SET); 691 mOffset = mFreeBoxOffset; 692 write(mMoovBoxBuffer, 1, mMoovBoxBufferOffset); 693 694 // Free box 695 lseek64(mFd, mOffset, SEEK_SET); 696 writeInt32(mEstimatedMoovBoxSize - mMoovBoxBufferOffset); 697 write("free", 4); 698 699 // Free temp memory 700 free(mMoovBoxBuffer); 701 mMoovBoxBuffer = NULL; 702 mMoovBoxBufferOffset = 0; 703 } else { 704 LOGI("The mp4 file will not be streamable."); 705 } 706 707 CHECK(mBoxes.empty()); 708 709 release(); 710 return err; 711 } 712 713 void MPEG4Writer::writeMvhdBox(int64_t durationUs) { 714 time_t now = time(NULL); 715 beginBox("mvhd"); 716 writeInt32(0); // version=0, flags=0 717 writeInt32(now); // creation time 718 writeInt32(now); // modification time 719 writeInt32(mTimeScale); // mvhd timescale 720 int32_t duration = (durationUs * mTimeScale + 5E5) / 1E6; 721 writeInt32(duration); 722 writeInt32(0x10000); // rate: 1.0 723 writeInt16(0x100); // volume 724 writeInt16(0); // reserved 725 writeInt32(0); // reserved 726 writeInt32(0); // reserved 727 writeCompositionMatrix(0); // matrix 728 writeInt32(0); // predefined 729 writeInt32(0); // predefined 730 writeInt32(0); // predefined 731 writeInt32(0); // predefined 732 writeInt32(0); // predefined 733 writeInt32(0); // predefined 734 writeInt32(mTracks.size() + 1); // nextTrackID 735 endBox(); // mvhd 736 } 737 738 void MPEG4Writer::writeMoovBox(int64_t durationUs) { 739 beginBox("moov"); 740 writeMvhdBox(durationUs); 741 if (mAreGeoTagsAvailable) { 742 writeUdtaBox(); 743 } 744 int32_t id = 1; 745 for (List<Track *>::iterator it = mTracks.begin(); 746 it != mTracks.end(); ++it, ++id) { 747 (*it)->writeTrackHeader(mUse32BitOffset); 748 } 749 endBox(); // moov 750 } 751 752 void MPEG4Writer::writeFtypBox(MetaData *param) { 753 beginBox("ftyp"); 754 755 int32_t fileType; 756 if (param && param->findInt32(kKeyFileType, &fileType) && 757 fileType != OUTPUT_FORMAT_MPEG_4) { 758 writeFourcc("3gp4"); 759 } else { 760 writeFourcc("isom"); 761 } 762 763 writeInt32(0); 764 writeFourcc("isom"); 765 writeFourcc("3gp4"); 766 endBox(); 767 } 768 769 static bool isTestModeEnabled() { 770 #if (PROPERTY_VALUE_MAX < 5) 771 #error "PROPERTY_VALUE_MAX must be at least 5" 772 #endif 773 774 // Test mode is enabled only if rw.media.record.test system 775 // property is enabled. 776 char value[PROPERTY_VALUE_MAX]; 777 if (property_get("rw.media.record.test", value, NULL) && 778 (!strcasecmp(value, "true") || !strcasecmp(value, "1"))) { 779 return true; 780 } 781 return false; 782 } 783 784 void MPEG4Writer::sendSessionSummary() { 785 // Send session summary only if test mode is enabled 786 if (!isTestModeEnabled()) { 787 return; 788 } 789 790 for (List<ChunkInfo>::iterator it = mChunkInfos.begin(); 791 it != mChunkInfos.end(); ++it) { 792 int trackNum = it->mTrack->getTrackId() << 28; 793 notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 794 trackNum | MEDIA_RECORDER_TRACK_INTER_CHUNK_TIME_MS, 795 it->mMaxInterChunkDurUs); 796 } 797 } 798 799 status_t MPEG4Writer::setInterleaveDuration(uint32_t durationUs) { 800 mInterleaveDurationUs = durationUs; 801 return OK; 802 } 803 804 void MPEG4Writer::lock() { 805 mLock.lock(); 806 } 807 808 void MPEG4Writer::unlock() { 809 mLock.unlock(); 810 } 811 812 off64_t MPEG4Writer::addSample_l(MediaBuffer *buffer) { 813 off64_t old_offset = mOffset; 814 815 ::write(mFd, 816 (const uint8_t *)buffer->data() + buffer->range_offset(), 817 buffer->range_length()); 818 819 mOffset += buffer->range_length(); 820 821 return old_offset; 822 } 823 824 static void StripStartcode(MediaBuffer *buffer) { 825 if (buffer->range_length() < 4) { 826 return; 827 } 828 829 const uint8_t *ptr = 830 (const uint8_t *)buffer->data() + buffer->range_offset(); 831 832 if (!memcmp(ptr, "\x00\x00\x00\x01", 4)) { 833 buffer->set_range( 834 buffer->range_offset() + 4, buffer->range_length() - 4); 835 } 836 } 837 838 off64_t MPEG4Writer::addLengthPrefixedSample_l(MediaBuffer *buffer) { 839 off64_t old_offset = mOffset; 840 841 size_t length = buffer->range_length(); 842 843 if (mUse4ByteNalLength) { 844 uint8_t x = length >> 24; 845 ::write(mFd, &x, 1); 846 x = (length >> 16) & 0xff; 847 ::write(mFd, &x, 1); 848 x = (length >> 8) & 0xff; 849 ::write(mFd, &x, 1); 850 x = length & 0xff; 851 ::write(mFd, &x, 1); 852 853 ::write(mFd, 854 (const uint8_t *)buffer->data() + buffer->range_offset(), 855 length); 856 857 mOffset += length + 4; 858 } else { 859 CHECK(length < 65536); 860 861 uint8_t x = length >> 8; 862 ::write(mFd, &x, 1); 863 x = length & 0xff; 864 ::write(mFd, &x, 1); 865 ::write(mFd, (const uint8_t *)buffer->data() + buffer->range_offset(), length); 866 mOffset += length + 2; 867 } 868 869 return old_offset; 870 } 871 872 size_t MPEG4Writer::write( 873 const void *ptr, size_t size, size_t nmemb) { 874 875 const size_t bytes = size * nmemb; 876 if (mWriteMoovBoxToMemory) { 877 // This happens only when we write the moov box at the end of 878 // recording, not for each output video/audio frame we receive. 879 off64_t moovBoxSize = 8 + mMoovBoxBufferOffset + bytes; 880 if (moovBoxSize > mEstimatedMoovBoxSize) { 881 for (List<off64_t>::iterator it = mBoxes.begin(); 882 it != mBoxes.end(); ++it) { 883 (*it) += mOffset; 884 } 885 lseek64(mFd, mOffset, SEEK_SET); 886 ::write(mFd, mMoovBoxBuffer, mMoovBoxBufferOffset); 887 ::write(mFd, ptr, size * nmemb); 888 mOffset += (bytes + mMoovBoxBufferOffset); 889 free(mMoovBoxBuffer); 890 mMoovBoxBuffer = NULL; 891 mMoovBoxBufferOffset = 0; 892 mWriteMoovBoxToMemory = false; 893 mStreamableFile = false; 894 } else { 895 memcpy(mMoovBoxBuffer + mMoovBoxBufferOffset, ptr, bytes); 896 mMoovBoxBufferOffset += bytes; 897 } 898 } else { 899 ::write(mFd, ptr, size * nmemb); 900 mOffset += bytes; 901 } 902 return bytes; 903 } 904 905 void MPEG4Writer::beginBox(const char *fourcc) { 906 CHECK_EQ(strlen(fourcc), 4); 907 908 mBoxes.push_back(mWriteMoovBoxToMemory? 909 mMoovBoxBufferOffset: mOffset); 910 911 writeInt32(0); 912 writeFourcc(fourcc); 913 } 914 915 void MPEG4Writer::endBox() { 916 CHECK(!mBoxes.empty()); 917 918 off64_t offset = *--mBoxes.end(); 919 mBoxes.erase(--mBoxes.end()); 920 921 if (mWriteMoovBoxToMemory) { 922 int32_t x = htonl(mMoovBoxBufferOffset - offset); 923 memcpy(mMoovBoxBuffer + offset, &x, 4); 924 } else { 925 lseek64(mFd, offset, SEEK_SET); 926 writeInt32(mOffset - offset); 927 mOffset -= 4; 928 lseek64(mFd, mOffset, SEEK_SET); 929 } 930 } 931 932 void MPEG4Writer::writeInt8(int8_t x) { 933 write(&x, 1, 1); 934 } 935 936 void MPEG4Writer::writeInt16(int16_t x) { 937 x = htons(x); 938 write(&x, 1, 2); 939 } 940 941 void MPEG4Writer::writeInt32(int32_t x) { 942 x = htonl(x); 943 write(&x, 1, 4); 944 } 945 946 void MPEG4Writer::writeInt64(int64_t x) { 947 x = hton64(x); 948 write(&x, 1, 8); 949 } 950 951 void MPEG4Writer::writeCString(const char *s) { 952 size_t n = strlen(s); 953 write(s, 1, n + 1); 954 } 955 956 void MPEG4Writer::writeFourcc(const char *s) { 957 CHECK_EQ(strlen(s), 4); 958 write(s, 1, 4); 959 } 960 961 962 // Written in +/-DD.DDDD format 963 void MPEG4Writer::writeLatitude(int degreex10000) { 964 bool isNegative = (degreex10000 < 0); 965 char sign = isNegative? '-': '+'; 966 967 // Handle the whole part 968 char str[9]; 969 int wholePart = degreex10000 / 10000; 970 if (wholePart == 0) { 971 snprintf(str, 5, "%c%.2d.", sign, wholePart); 972 } else { 973 snprintf(str, 5, "%+.2d.", wholePart); 974 } 975 976 // Handle the fractional part 977 int fractionalPart = degreex10000 - (wholePart * 10000); 978 if (fractionalPart < 0) { 979 fractionalPart = -fractionalPart; 980 } 981 snprintf(&str[4], 5, "%.4d", fractionalPart); 982 983 // Do not write the null terminator 984 write(str, 1, 8); 985 } 986 987 // Written in +/- DDD.DDDD format 988 void MPEG4Writer::writeLongitude(int degreex10000) { 989 bool isNegative = (degreex10000 < 0); 990 char sign = isNegative? '-': '+'; 991 992 // Handle the whole part 993 char str[10]; 994 int wholePart = degreex10000 / 10000; 995 if (wholePart == 0) { 996 snprintf(str, 6, "%c%.3d.", sign, wholePart); 997 } else { 998 snprintf(str, 6, "%+.3d.", wholePart); 999 } 1000 1001 // Handle the fractional part 1002 int fractionalPart = degreex10000 - (wholePart * 10000); 1003 if (fractionalPart < 0) { 1004 fractionalPart = -fractionalPart; 1005 } 1006 snprintf(&str[5], 5, "%.4d", fractionalPart); 1007 1008 // Do not write the null terminator 1009 write(str, 1, 9); 1010 } 1011 1012 /* 1013 * Geodata is stored according to ISO-6709 standard. 1014 * latitudex10000 is latitude in degrees times 10000, and 1015 * longitudex10000 is longitude in degrees times 10000. 1016 * The range for the latitude is in [-90, +90], and 1017 * The range for the longitude is in [-180, +180] 1018 */ 1019 status_t MPEG4Writer::setGeoData(int latitudex10000, int longitudex10000) { 1020 // Is latitude or longitude out of range? 1021 if (latitudex10000 < -900000 || latitudex10000 > 900000 || 1022 longitudex10000 < -1800000 || longitudex10000 > 1800000) { 1023 return BAD_VALUE; 1024 } 1025 1026 mLatitudex10000 = latitudex10000; 1027 mLongitudex10000 = longitudex10000; 1028 mAreGeoTagsAvailable = true; 1029 return OK; 1030 } 1031 1032 void MPEG4Writer::write(const void *data, size_t size) { 1033 write(data, 1, size); 1034 } 1035 1036 bool MPEG4Writer::isFileStreamable() const { 1037 return mStreamableFile; 1038 } 1039 1040 bool MPEG4Writer::exceedsFileSizeLimit() { 1041 // No limit 1042 if (mMaxFileSizeLimitBytes == 0) { 1043 return false; 1044 } 1045 1046 int64_t nTotalBytesEstimate = static_cast<int64_t>(mEstimatedMoovBoxSize); 1047 for (List<Track *>::iterator it = mTracks.begin(); 1048 it != mTracks.end(); ++it) { 1049 nTotalBytesEstimate += (*it)->getEstimatedTrackSizeBytes(); 1050 } 1051 1052 // Be conservative in the estimate: do not exceed 95% of 1053 // the target file limit. For small target file size limit, though, 1054 // this will not help. 1055 return (nTotalBytesEstimate >= (95 * mMaxFileSizeLimitBytes) / 100); 1056 } 1057 1058 bool MPEG4Writer::exceedsFileDurationLimit() { 1059 // No limit 1060 if (mMaxFileDurationLimitUs == 0) { 1061 return false; 1062 } 1063 1064 for (List<Track *>::iterator it = mTracks.begin(); 1065 it != mTracks.end(); ++it) { 1066 if ((*it)->getDurationUs() >= mMaxFileDurationLimitUs) { 1067 return true; 1068 } 1069 } 1070 return false; 1071 } 1072 1073 bool MPEG4Writer::reachedEOS() { 1074 bool allDone = true; 1075 for (List<Track *>::iterator it = mTracks.begin(); 1076 it != mTracks.end(); ++it) { 1077 if (!(*it)->reachedEOS()) { 1078 allDone = false; 1079 break; 1080 } 1081 } 1082 1083 return allDone; 1084 } 1085 1086 void MPEG4Writer::setStartTimestampUs(int64_t timeUs) { 1087 LOGI("setStartTimestampUs: %lld", timeUs); 1088 CHECK(timeUs >= 0); 1089 Mutex::Autolock autoLock(mLock); 1090 if (mStartTimestampUs < 0 || mStartTimestampUs > timeUs) { 1091 mStartTimestampUs = timeUs; 1092 LOGI("Earliest track starting time: %lld", mStartTimestampUs); 1093 } 1094 } 1095 1096 int64_t MPEG4Writer::getStartTimestampUs() { 1097 Mutex::Autolock autoLock(mLock); 1098 return mStartTimestampUs; 1099 } 1100 1101 size_t MPEG4Writer::numTracks() { 1102 Mutex::Autolock autolock(mLock); 1103 return mTracks.size(); 1104 } 1105 1106 //////////////////////////////////////////////////////////////////////////////// 1107 1108 MPEG4Writer::Track::Track( 1109 MPEG4Writer *owner, const sp<MediaSource> &source, size_t trackId) 1110 : mOwner(owner), 1111 mMeta(source->getFormat()), 1112 mSource(source), 1113 mDone(false), 1114 mPaused(false), 1115 mResumed(false), 1116 mStarted(false), 1117 mTrackId(trackId), 1118 mTrackDurationUs(0), 1119 mEstimatedTrackSizeBytes(0), 1120 mSamplesHaveSameSize(true), 1121 mCodecSpecificData(NULL), 1122 mCodecSpecificDataSize(0), 1123 mGotAllCodecSpecificData(false), 1124 mReachedEOS(false), 1125 mRotation(0) { 1126 getCodecSpecificDataFromInputFormatIfPossible(); 1127 1128 const char *mime; 1129 mMeta->findCString(kKeyMIMEType, &mime); 1130 mIsAvc = !strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_AVC); 1131 mIsAudio = !strncasecmp(mime, "audio/", 6); 1132 mIsMPEG4 = !strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_MPEG4) || 1133 !strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_AAC); 1134 1135 setTimeScale(); 1136 } 1137 1138 void MPEG4Writer::Track::updateTrackSizeEstimate() { 1139 1140 int64_t stcoBoxSizeBytes = mOwner->use32BitFileOffset() 1141 ? mNumStcoTableEntries * 4 1142 : mNumStcoTableEntries * 8; 1143 1144 int64_t stszBoxSizeBytes = mSamplesHaveSameSize? 4: (mNumSamples * 4); 1145 1146 mEstimatedTrackSizeBytes = mMdatSizeBytes; // media data size 1147 if (!mOwner->isFileStreamable()) { 1148 // Reserved free space is not large enough to hold 1149 // all meta data and thus wasted. 1150 mEstimatedTrackSizeBytes += mNumStscTableEntries * 12 + // stsc box size 1151 mNumStssTableEntries * 4 + // stss box size 1152 mNumSttsTableEntries * 8 + // stts box size 1153 mNumCttsTableEntries * 8 + // ctts box size 1154 stcoBoxSizeBytes + // stco box size 1155 stszBoxSizeBytes; // stsz box size 1156 } 1157 } 1158 1159 void MPEG4Writer::Track::addOneStscTableEntry( 1160 size_t chunkId, size_t sampleId) { 1161 1162 StscTableEntry stscEntry(chunkId, sampleId, 1); 1163 mStscTableEntries.push_back(stscEntry); 1164 ++mNumStscTableEntries; 1165 } 1166 1167 void MPEG4Writer::Track::addOneStssTableEntry(size_t sampleId) { 1168 mStssTableEntries.push_back(sampleId); 1169 ++mNumStssTableEntries; 1170 } 1171 1172 void MPEG4Writer::Track::addOneSttsTableEntry( 1173 size_t sampleCount, int32_t duration) { 1174 1175 if (duration == 0) { 1176 LOGW("0-duration samples found: %d", sampleCount); 1177 } 1178 SttsTableEntry sttsEntry(sampleCount, duration); 1179 mSttsTableEntries.push_back(sttsEntry); 1180 ++mNumSttsTableEntries; 1181 } 1182 1183 void MPEG4Writer::Track::addOneCttsTableEntry( 1184 size_t sampleCount, int32_t duration) { 1185 1186 if (mIsAudio) { 1187 return; 1188 } 1189 if (duration < 0 && !mHasNegativeCttsDeltaDuration) { 1190 mHasNegativeCttsDeltaDuration = true; 1191 } 1192 CttsTableEntry cttsEntry(sampleCount, duration); 1193 mCttsTableEntries.push_back(cttsEntry); 1194 ++mNumCttsTableEntries; 1195 } 1196 1197 void MPEG4Writer::Track::addChunkOffset(off64_t offset) { 1198 ++mNumStcoTableEntries; 1199 mChunkOffsets.push_back(offset); 1200 } 1201 1202 void MPEG4Writer::Track::setTimeScale() { 1203 LOGV("setTimeScale"); 1204 // Default time scale 1205 mTimeScale = 90000; 1206 1207 if (mIsAudio) { 1208 // Use the sampling rate as the default time scale for audio track. 1209 int32_t sampleRate; 1210 bool success = mMeta->findInt32(kKeySampleRate, &sampleRate); 1211 CHECK(success); 1212 mTimeScale = sampleRate; 1213 } 1214 1215 // If someone would like to overwrite the timescale, use user-supplied value. 1216 int32_t timeScale; 1217 if (mMeta->findInt32(kKeyTimeScale, &timeScale)) { 1218 mTimeScale = timeScale; 1219 } 1220 1221 CHECK(mTimeScale > 0); 1222 } 1223 1224 void MPEG4Writer::Track::getCodecSpecificDataFromInputFormatIfPossible() { 1225 const char *mime; 1226 CHECK(mMeta->findCString(kKeyMIMEType, &mime)); 1227 1228 if (!strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_AVC)) { 1229 uint32_t type; 1230 const void *data; 1231 size_t size; 1232 if (mMeta->findData(kKeyAVCC, &type, &data, &size)) { 1233 mCodecSpecificData = malloc(size); 1234 mCodecSpecificDataSize = size; 1235 memcpy(mCodecSpecificData, data, size); 1236 mGotAllCodecSpecificData = true; 1237 } 1238 } else if (!strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_MPEG4) 1239 || !strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_AAC)) { 1240 uint32_t type; 1241 const void *data; 1242 size_t size; 1243 if (mMeta->findData(kKeyESDS, &type, &data, &size)) { 1244 ESDS esds(data, size); 1245 if (esds.getCodecSpecificInfo(&data, &size) == OK) { 1246 mCodecSpecificData = malloc(size); 1247 mCodecSpecificDataSize = size; 1248 memcpy(mCodecSpecificData, data, size); 1249 mGotAllCodecSpecificData = true; 1250 } 1251 } 1252 } 1253 } 1254 1255 MPEG4Writer::Track::~Track() { 1256 stop(); 1257 1258 if (mCodecSpecificData != NULL) { 1259 free(mCodecSpecificData); 1260 mCodecSpecificData = NULL; 1261 } 1262 } 1263 1264 void MPEG4Writer::Track::initTrackingProgressStatus(MetaData *params) { 1265 LOGV("initTrackingProgressStatus"); 1266 mPreviousTrackTimeUs = -1; 1267 mTrackingProgressStatus = false; 1268 mTrackEveryTimeDurationUs = 0; 1269 { 1270 int64_t timeUs; 1271 if (params && params->findInt64(kKeyTrackTimeStatus, &timeUs)) { 1272 LOGV("Receive request to track progress status for every %lld us", timeUs); 1273 mTrackEveryTimeDurationUs = timeUs; 1274 mTrackingProgressStatus = true; 1275 } 1276 } 1277 } 1278 1279 // static 1280 void *MPEG4Writer::ThreadWrapper(void *me) { 1281 LOGV("ThreadWrapper: %p", me); 1282 MPEG4Writer *writer = static_cast<MPEG4Writer *>(me); 1283 writer->threadFunc(); 1284 return NULL; 1285 } 1286 1287 void MPEG4Writer::bufferChunk(const Chunk& chunk) { 1288 LOGV("bufferChunk: %p", chunk.mTrack); 1289 Mutex::Autolock autolock(mLock); 1290 CHECK_EQ(mDone, false); 1291 1292 for (List<ChunkInfo>::iterator it = mChunkInfos.begin(); 1293 it != mChunkInfos.end(); ++it) { 1294 1295 if (chunk.mTrack == it->mTrack) { // Found owner 1296 it->mChunks.push_back(chunk); 1297 mChunkReadyCondition.signal(); 1298 return; 1299 } 1300 } 1301 1302 CHECK("Received a chunk for a unknown track" == 0); 1303 } 1304 1305 void MPEG4Writer::writeChunkToFile(Chunk* chunk) { 1306 LOGV("writeChunkToFile: %lld from %s track", 1307 chunk->mTimeStampUs, chunk->mTrack->isAudio()? "audio": "video"); 1308 1309 int32_t isFirstSample = true; 1310 while (!chunk->mSamples.empty()) { 1311 List<MediaBuffer *>::iterator it = chunk->mSamples.begin(); 1312 1313 off64_t offset = chunk->mTrack->isAvc() 1314 ? addLengthPrefixedSample_l(*it) 1315 : addSample_l(*it); 1316 1317 if (isFirstSample) { 1318 chunk->mTrack->addChunkOffset(offset); 1319 isFirstSample = false; 1320 } 1321 1322 (*it)->release(); 1323 (*it) = NULL; 1324 chunk->mSamples.erase(it); 1325 } 1326 chunk->mSamples.clear(); 1327 } 1328 1329 void MPEG4Writer::writeAllChunks() { 1330 LOGV("writeAllChunks"); 1331 size_t outstandingChunks = 0; 1332 Chunk chunk; 1333 while (findChunkToWrite(&chunk)) { 1334 writeChunkToFile(&chunk); 1335 ++outstandingChunks; 1336 } 1337 1338 sendSessionSummary(); 1339 1340 mChunkInfos.clear(); 1341 LOGD("%d chunks are written in the last batch", outstandingChunks); 1342 } 1343 1344 bool MPEG4Writer::findChunkToWrite(Chunk *chunk) { 1345 LOGV("findChunkToWrite"); 1346 1347 int64_t minTimestampUs = 0x7FFFFFFFFFFFFFFFLL; 1348 Track *track = NULL; 1349 for (List<ChunkInfo>::iterator it = mChunkInfos.begin(); 1350 it != mChunkInfos.end(); ++it) { 1351 if (!it->mChunks.empty()) { 1352 List<Chunk>::iterator chunkIt = it->mChunks.begin(); 1353 if (chunkIt->mTimeStampUs < minTimestampUs) { 1354 minTimestampUs = chunkIt->mTimeStampUs; 1355 track = it->mTrack; 1356 } 1357 } 1358 } 1359 1360 if (track == NULL) { 1361 LOGV("Nothing to be written after all"); 1362 return false; 1363 } 1364 1365 if (mIsFirstChunk) { 1366 mIsFirstChunk = false; 1367 } 1368 1369 for (List<ChunkInfo>::iterator it = mChunkInfos.begin(); 1370 it != mChunkInfos.end(); ++it) { 1371 if (it->mTrack == track) { 1372 *chunk = *(it->mChunks.begin()); 1373 it->mChunks.erase(it->mChunks.begin()); 1374 CHECK_EQ(chunk->mTrack, track); 1375 1376 int64_t interChunkTimeUs = 1377 chunk->mTimeStampUs - it->mPrevChunkTimestampUs; 1378 if (interChunkTimeUs > it->mPrevChunkTimestampUs) { 1379 it->mMaxInterChunkDurUs = interChunkTimeUs; 1380 } 1381 1382 return true; 1383 } 1384 } 1385 1386 return false; 1387 } 1388 1389 void MPEG4Writer::threadFunc() { 1390 LOGV("threadFunc"); 1391 1392 prctl(PR_SET_NAME, (unsigned long)"MPEG4Writer", 0, 0, 0); 1393 1394 Mutex::Autolock autoLock(mLock); 1395 while (!mDone) { 1396 Chunk chunk; 1397 bool chunkFound = false; 1398 1399 while (!mDone && !(chunkFound = findChunkToWrite(&chunk))) { 1400 mChunkReadyCondition.wait(mLock); 1401 } 1402 1403 // Actual write without holding the lock in order to 1404 // reduce the blocking time for media track threads. 1405 if (chunkFound) { 1406 mLock.unlock(); 1407 writeChunkToFile(&chunk); 1408 mLock.lock(); 1409 } 1410 } 1411 1412 writeAllChunks(); 1413 } 1414 1415 status_t MPEG4Writer::startWriterThread() { 1416 LOGV("startWriterThread"); 1417 1418 mDone = false; 1419 mIsFirstChunk = true; 1420 mDriftTimeUs = 0; 1421 for (List<Track *>::iterator it = mTracks.begin(); 1422 it != mTracks.end(); ++it) { 1423 ChunkInfo info; 1424 info.mTrack = *it; 1425 info.mPrevChunkTimestampUs = 0; 1426 info.mMaxInterChunkDurUs = 0; 1427 mChunkInfos.push_back(info); 1428 } 1429 1430 pthread_attr_t attr; 1431 pthread_attr_init(&attr); 1432 pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE); 1433 pthread_create(&mThread, &attr, ThreadWrapper, this); 1434 pthread_attr_destroy(&attr); 1435 mWriterThreadStarted = true; 1436 return OK; 1437 } 1438 1439 1440 status_t MPEG4Writer::Track::start(MetaData *params) { 1441 if (!mDone && mPaused) { 1442 mPaused = false; 1443 mResumed = true; 1444 return OK; 1445 } 1446 1447 int64_t startTimeUs; 1448 if (params == NULL || !params->findInt64(kKeyTime, &startTimeUs)) { 1449 startTimeUs = 0; 1450 } 1451 mStartTimeRealUs = startTimeUs; 1452 1453 int32_t rotationDegrees; 1454 if (!mIsAudio && params && params->findInt32(kKeyRotation, &rotationDegrees)) { 1455 mRotation = rotationDegrees; 1456 } 1457 1458 mIsRealTimeRecording = true; 1459 { 1460 int32_t isNotRealTime; 1461 if (params && params->findInt32(kKeyNotRealTime, &isNotRealTime)) { 1462 mIsRealTimeRecording = (isNotRealTime == 0); 1463 } 1464 } 1465 1466 initTrackingProgressStatus(params); 1467 1468 sp<MetaData> meta = new MetaData; 1469 if (mIsRealTimeRecording && mOwner->numTracks() > 1) { 1470 /* 1471 * This extra delay of accepting incoming audio/video signals 1472 * helps to align a/v start time at the beginning of a recording 1473 * session, and it also helps eliminate the "recording" sound for 1474 * camcorder applications. 1475 * 1476 * If client does not set the start time offset, we fall back to 1477 * use the default initial delay value. 1478 */ 1479 int64_t startTimeOffsetUs = mOwner->getStartTimeOffsetMs() * 1000LL; 1480 if (startTimeOffsetUs < 0) { // Start time offset was not set 1481 startTimeOffsetUs = kInitialDelayTimeUs; 1482 } 1483 startTimeUs += startTimeOffsetUs; 1484 LOGI("Start time offset: %lld us", startTimeOffsetUs); 1485 } 1486 1487 meta->setInt64(kKeyTime, startTimeUs); 1488 1489 status_t err = mSource->start(meta.get()); 1490 if (err != OK) { 1491 mDone = mReachedEOS = true; 1492 return err; 1493 } 1494 1495 pthread_attr_t attr; 1496 pthread_attr_init(&attr); 1497 pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE); 1498 1499 mDone = false; 1500 mStarted = true; 1501 mTrackDurationUs = 0; 1502 mReachedEOS = false; 1503 mEstimatedTrackSizeBytes = 0; 1504 mNumStcoTableEntries = 0; 1505 mNumStssTableEntries = 0; 1506 mNumStscTableEntries = 0; 1507 mNumSttsTableEntries = 0; 1508 mNumCttsTableEntries = 0; 1509 mMdatSizeBytes = 0; 1510 1511 mMaxChunkDurationUs = 0; 1512 mHasNegativeCttsDeltaDuration = false; 1513 1514 pthread_create(&mThread, &attr, ThreadWrapper, this); 1515 pthread_attr_destroy(&attr); 1516 1517 return OK; 1518 } 1519 1520 status_t MPEG4Writer::Track::pause() { 1521 mPaused = true; 1522 return OK; 1523 } 1524 1525 status_t MPEG4Writer::Track::stop() { 1526 LOGD("Stopping %s track", mIsAudio? "Audio": "Video"); 1527 if (!mStarted) { 1528 LOGE("Stop() called but track is not started"); 1529 return ERROR_END_OF_STREAM; 1530 } 1531 1532 if (mDone) { 1533 return OK; 1534 } 1535 mDone = true; 1536 1537 void *dummy; 1538 pthread_join(mThread, &dummy); 1539 1540 status_t err = (status_t) dummy; 1541 1542 LOGD("Stopping %s track source", mIsAudio? "Audio": "Video"); 1543 { 1544 status_t status = mSource->stop(); 1545 if (err == OK && status != OK && status != ERROR_END_OF_STREAM) { 1546 err = status; 1547 } 1548 } 1549 1550 LOGD("%s track stopped", mIsAudio? "Audio": "Video"); 1551 return err; 1552 } 1553 1554 bool MPEG4Writer::Track::reachedEOS() { 1555 return mReachedEOS; 1556 } 1557 1558 // static 1559 void *MPEG4Writer::Track::ThreadWrapper(void *me) { 1560 Track *track = static_cast<Track *>(me); 1561 1562 status_t err = track->threadEntry(); 1563 return (void *) err; 1564 } 1565 1566 static void getNalUnitType(uint8_t byte, uint8_t* type) { 1567 LOGV("getNalUnitType: %d", byte); 1568 1569 // nal_unit_type: 5-bit unsigned integer 1570 *type = (byte & 0x1F); 1571 } 1572 1573 static const uint8_t *findNextStartCode( 1574 const uint8_t *data, size_t length) { 1575 1576 LOGV("findNextStartCode: %p %d", data, length); 1577 1578 size_t bytesLeft = length; 1579 while (bytesLeft > 4 && 1580 memcmp("\x00\x00\x00\x01", &data[length - bytesLeft], 4)) { 1581 --bytesLeft; 1582 } 1583 if (bytesLeft <= 4) { 1584 bytesLeft = 0; // Last parameter set 1585 } 1586 return &data[length - bytesLeft]; 1587 } 1588 1589 const uint8_t *MPEG4Writer::Track::parseParamSet( 1590 const uint8_t *data, size_t length, int type, size_t *paramSetLen) { 1591 1592 LOGV("parseParamSet"); 1593 CHECK(type == kNalUnitTypeSeqParamSet || 1594 type == kNalUnitTypePicParamSet); 1595 1596 const uint8_t *nextStartCode = findNextStartCode(data, length); 1597 *paramSetLen = nextStartCode - data; 1598 if (*paramSetLen == 0) { 1599 LOGE("Param set is malformed, since its length is 0"); 1600 return NULL; 1601 } 1602 1603 AVCParamSet paramSet(*paramSetLen, data); 1604 if (type == kNalUnitTypeSeqParamSet) { 1605 if (*paramSetLen < 4) { 1606 LOGE("Seq parameter set malformed"); 1607 return NULL; 1608 } 1609 if (mSeqParamSets.empty()) { 1610 mProfileIdc = data[1]; 1611 mProfileCompatible = data[2]; 1612 mLevelIdc = data[3]; 1613 } else { 1614 if (mProfileIdc != data[1] || 1615 mProfileCompatible != data[2] || 1616 mLevelIdc != data[3]) { 1617 LOGE("Inconsistent profile/level found in seq parameter sets"); 1618 return NULL; 1619 } 1620 } 1621 mSeqParamSets.push_back(paramSet); 1622 } else { 1623 mPicParamSets.push_back(paramSet); 1624 } 1625 return nextStartCode; 1626 } 1627 1628 status_t MPEG4Writer::Track::copyAVCCodecSpecificData( 1629 const uint8_t *data, size_t size) { 1630 LOGV("copyAVCCodecSpecificData"); 1631 1632 // 2 bytes for each of the parameter set length field 1633 // plus the 7 bytes for the header 1634 if (size < 4 + 7) { 1635 LOGE("Codec specific data length too short: %d", size); 1636 return ERROR_MALFORMED; 1637 } 1638 1639 mCodecSpecificDataSize = size; 1640 mCodecSpecificData = malloc(size); 1641 memcpy(mCodecSpecificData, data, size); 1642 return OK; 1643 } 1644 1645 status_t MPEG4Writer::Track::parseAVCCodecSpecificData( 1646 const uint8_t *data, size_t size) { 1647 1648 LOGV("parseAVCCodecSpecificData"); 1649 // Data starts with a start code. 1650 // SPS and PPS are separated with start codes. 1651 // Also, SPS must come before PPS 1652 uint8_t type = kNalUnitTypeSeqParamSet; 1653 bool gotSps = false; 1654 bool gotPps = false; 1655 const uint8_t *tmp = data; 1656 const uint8_t *nextStartCode = data; 1657 size_t bytesLeft = size; 1658 size_t paramSetLen = 0; 1659 mCodecSpecificDataSize = 0; 1660 while (bytesLeft > 4 && !memcmp("\x00\x00\x00\x01", tmp, 4)) { 1661 getNalUnitType(*(tmp + 4), &type); 1662 if (type == kNalUnitTypeSeqParamSet) { 1663 if (gotPps) { 1664 LOGE("SPS must come before PPS"); 1665 return ERROR_MALFORMED; 1666 } 1667 if (!gotSps) { 1668 gotSps = true; 1669 } 1670 nextStartCode = parseParamSet(tmp + 4, bytesLeft - 4, type, ¶mSetLen); 1671 } else if (type == kNalUnitTypePicParamSet) { 1672 if (!gotSps) { 1673 LOGE("SPS must come before PPS"); 1674 return ERROR_MALFORMED; 1675 } 1676 if (!gotPps) { 1677 gotPps = true; 1678 } 1679 nextStartCode = parseParamSet(tmp + 4, bytesLeft - 4, type, ¶mSetLen); 1680 } else { 1681 LOGE("Only SPS and PPS Nal units are expected"); 1682 return ERROR_MALFORMED; 1683 } 1684 1685 if (nextStartCode == NULL) { 1686 return ERROR_MALFORMED; 1687 } 1688 1689 // Move on to find the next parameter set 1690 bytesLeft -= nextStartCode - tmp; 1691 tmp = nextStartCode; 1692 mCodecSpecificDataSize += (2 + paramSetLen); 1693 } 1694 1695 { 1696 // Check on the number of seq parameter sets 1697 size_t nSeqParamSets = mSeqParamSets.size(); 1698 if (nSeqParamSets == 0) { 1699 LOGE("Cound not find sequence parameter set"); 1700 return ERROR_MALFORMED; 1701 } 1702 1703 if (nSeqParamSets > 0x1F) { 1704 LOGE("Too many seq parameter sets (%d) found", nSeqParamSets); 1705 return ERROR_MALFORMED; 1706 } 1707 } 1708 1709 { 1710 // Check on the number of pic parameter sets 1711 size_t nPicParamSets = mPicParamSets.size(); 1712 if (nPicParamSets == 0) { 1713 LOGE("Cound not find picture parameter set"); 1714 return ERROR_MALFORMED; 1715 } 1716 if (nPicParamSets > 0xFF) { 1717 LOGE("Too many pic parameter sets (%d) found", nPicParamSets); 1718 return ERROR_MALFORMED; 1719 } 1720 } 1721 // FIXME: 1722 // Add chromat_format_idc, bit depth values, etc for AVC/h264 high profile and above 1723 // and remove #if 0 1724 #if 0 1725 { 1726 // Check on the profiles 1727 // These profiles requires additional parameter set extensions 1728 if (mProfileIdc == 100 || mProfileIdc == 110 || 1729 mProfileIdc == 122 || mProfileIdc == 144) { 1730 LOGE("Sorry, no support for profile_idc: %d!", mProfileIdc); 1731 return BAD_VALUE; 1732 } 1733 } 1734 #endif 1735 return OK; 1736 } 1737 1738 status_t MPEG4Writer::Track::makeAVCCodecSpecificData( 1739 const uint8_t *data, size_t size) { 1740 1741 if (mCodecSpecificData != NULL) { 1742 LOGE("Already have codec specific data"); 1743 return ERROR_MALFORMED; 1744 } 1745 1746 if (size < 4) { 1747 LOGE("Codec specific data length too short: %d", size); 1748 return ERROR_MALFORMED; 1749 } 1750 1751 // Data is in the form of AVCCodecSpecificData 1752 if (memcmp("\x00\x00\x00\x01", data, 4)) { 1753 return copyAVCCodecSpecificData(data, size); 1754 } 1755 1756 if (parseAVCCodecSpecificData(data, size) != OK) { 1757 return ERROR_MALFORMED; 1758 } 1759 1760 // ISO 14496-15: AVC file format 1761 mCodecSpecificDataSize += 7; // 7 more bytes in the header 1762 mCodecSpecificData = malloc(mCodecSpecificDataSize); 1763 uint8_t *header = (uint8_t *)mCodecSpecificData; 1764 header[0] = 1; // version 1765 header[1] = mProfileIdc; // profile indication 1766 header[2] = mProfileCompatible; // profile compatibility 1767 header[3] = mLevelIdc; 1768 1769 // 6-bit '111111' followed by 2-bit to lengthSizeMinuusOne 1770 if (mOwner->useNalLengthFour()) { 1771 header[4] = 0xfc | 3; // length size == 4 bytes 1772 } else { 1773 header[4] = 0xfc | 1; // length size == 2 bytes 1774 } 1775 1776 // 3-bit '111' followed by 5-bit numSequenceParameterSets 1777 int nSequenceParamSets = mSeqParamSets.size(); 1778 header[5] = 0xe0 | nSequenceParamSets; 1779 header += 6; 1780 for (List<AVCParamSet>::iterator it = mSeqParamSets.begin(); 1781 it != mSeqParamSets.end(); ++it) { 1782 // 16-bit sequence parameter set length 1783 uint16_t seqParamSetLength = it->mLength; 1784 header[0] = seqParamSetLength >> 8; 1785 header[1] = seqParamSetLength & 0xff; 1786 1787 // SPS NAL unit (sequence parameter length bytes) 1788 memcpy(&header[2], it->mData, seqParamSetLength); 1789 header += (2 + seqParamSetLength); 1790 } 1791 1792 // 8-bit nPictureParameterSets 1793 int nPictureParamSets = mPicParamSets.size(); 1794 header[0] = nPictureParamSets; 1795 header += 1; 1796 for (List<AVCParamSet>::iterator it = mPicParamSets.begin(); 1797 it != mPicParamSets.end(); ++it) { 1798 // 16-bit picture parameter set length 1799 uint16_t picParamSetLength = it->mLength; 1800 header[0] = picParamSetLength >> 8; 1801 header[1] = picParamSetLength & 0xff; 1802 1803 // PPS Nal unit (picture parameter set length bytes) 1804 memcpy(&header[2], it->mData, picParamSetLength); 1805 header += (2 + picParamSetLength); 1806 } 1807 1808 return OK; 1809 } 1810 1811 /* 1812 * Updates the drift time from the audio track so that 1813 * the video track can get the updated drift time information 1814 * from the file writer. The fluctuation of the drift time of the audio 1815 * encoding path is smoothed out with a simple filter by giving a larger 1816 * weight to more recently drift time. The filter coefficients, 0.5 and 0.5, 1817 * are heuristically determined. 1818 */ 1819 void MPEG4Writer::Track::updateDriftTime(const sp<MetaData>& meta) { 1820 int64_t driftTimeUs = 0; 1821 if (meta->findInt64(kKeyDriftTime, &driftTimeUs)) { 1822 int64_t prevDriftTimeUs = mOwner->getDriftTimeUs(); 1823 int64_t timeUs = (driftTimeUs + prevDriftTimeUs) >> 1; 1824 mOwner->setDriftTimeUs(timeUs); 1825 } 1826 } 1827 1828 status_t MPEG4Writer::Track::threadEntry() { 1829 int32_t count = 0; 1830 const int64_t interleaveDurationUs = mOwner->interleaveDuration(); 1831 const bool hasMultipleTracks = (mOwner->numTracks() > 1); 1832 int64_t chunkTimestampUs = 0; 1833 int32_t nChunks = 0; 1834 int32_t nZeroLengthFrames = 0; 1835 int64_t lastTimestampUs = 0; // Previous sample time stamp 1836 int64_t lastCttsTimeUs = 0; // Previous sample time stamp 1837 int64_t lastDurationUs = 0; // Between the previous two samples 1838 int64_t currDurationTicks = 0; // Timescale based ticks 1839 int64_t lastDurationTicks = 0; // Timescale based ticks 1840 int32_t sampleCount = 1; // Sample count in the current stts table entry 1841 int64_t currCttsDurTicks = 0; // Timescale based ticks 1842 int64_t lastCttsDurTicks = 0; // Timescale based ticks 1843 int32_t cttsSampleCount = 1; // Sample count in the current ctts table entry 1844 uint32_t previousSampleSize = 0; // Size of the previous sample 1845 int64_t previousPausedDurationUs = 0; 1846 int64_t timestampUs = 0; 1847 int64_t cttsDeltaTimeUs = 0; 1848 bool hasBFrames = false; 1849 1850 #if 1 1851 // XXX: Samsung's video encoder's output buffer timestamp 1852 // is not correct. see bug 4724339 1853 char value[PROPERTY_VALUE_MAX]; 1854 if (property_get("rw.media.record.hasb", value, NULL) && 1855 (!strcasecmp(value, "true") || !strcasecmp(value, "1"))) { 1856 hasBFrames = true; 1857 } 1858 #endif 1859 if (mIsAudio) { 1860 prctl(PR_SET_NAME, (unsigned long)"AudioTrackEncoding", 0, 0, 0); 1861 } else { 1862 prctl(PR_SET_NAME, (unsigned long)"VideoTrackEncoding", 0, 0, 0); 1863 } 1864 androidSetThreadPriority(0, ANDROID_PRIORITY_AUDIO); 1865 1866 sp<MetaData> meta_data; 1867 1868 mNumSamples = 0; 1869 status_t err = OK; 1870 MediaBuffer *buffer; 1871 while (!mDone && (err = mSource->read(&buffer)) == OK) { 1872 if (buffer->range_length() == 0) { 1873 buffer->release(); 1874 buffer = NULL; 1875 ++nZeroLengthFrames; 1876 continue; 1877 } 1878 1879 // If the codec specific data has not been received yet, delay pause. 1880 // After the codec specific data is received, discard what we received 1881 // when the track is to be paused. 1882 if (mPaused && !mResumed) { 1883 buffer->release(); 1884 buffer = NULL; 1885 continue; 1886 } 1887 1888 ++count; 1889 1890 int32_t isCodecConfig; 1891 if (buffer->meta_data()->findInt32(kKeyIsCodecConfig, &isCodecConfig) 1892 && isCodecConfig) { 1893 CHECK(!mGotAllCodecSpecificData); 1894 1895 if (mIsAvc) { 1896 status_t err = makeAVCCodecSpecificData( 1897 (const uint8_t *)buffer->data() 1898 + buffer->range_offset(), 1899 buffer->range_length()); 1900 CHECK_EQ(OK, err); 1901 } else if (mIsMPEG4) { 1902 mCodecSpecificDataSize = buffer->range_length(); 1903 mCodecSpecificData = malloc(mCodecSpecificDataSize); 1904 memcpy(mCodecSpecificData, 1905 (const uint8_t *)buffer->data() 1906 + buffer->range_offset(), 1907 buffer->range_length()); 1908 } 1909 1910 buffer->release(); 1911 buffer = NULL; 1912 1913 mGotAllCodecSpecificData = true; 1914 continue; 1915 } 1916 1917 // Make a deep copy of the MediaBuffer and Metadata and release 1918 // the original as soon as we can 1919 MediaBuffer *copy = new MediaBuffer(buffer->range_length()); 1920 memcpy(copy->data(), (uint8_t *)buffer->data() + buffer->range_offset(), 1921 buffer->range_length()); 1922 copy->set_range(0, buffer->range_length()); 1923 meta_data = new MetaData(*buffer->meta_data().get()); 1924 buffer->release(); 1925 buffer = NULL; 1926 1927 if (mIsAvc) StripStartcode(copy); 1928 1929 size_t sampleSize = copy->range_length(); 1930 if (mIsAvc) { 1931 if (mOwner->useNalLengthFour()) { 1932 sampleSize += 4; 1933 } else { 1934 sampleSize += 2; 1935 } 1936 } 1937 1938 // Max file size or duration handling 1939 mMdatSizeBytes += sampleSize; 1940 updateTrackSizeEstimate(); 1941 1942 if (mOwner->exceedsFileSizeLimit()) { 1943 mOwner->notify(MEDIA_RECORDER_EVENT_INFO, MEDIA_RECORDER_INFO_MAX_FILESIZE_REACHED, 0); 1944 break; 1945 } 1946 if (mOwner->exceedsFileDurationLimit()) { 1947 mOwner->notify(MEDIA_RECORDER_EVENT_INFO, MEDIA_RECORDER_INFO_MAX_DURATION_REACHED, 0); 1948 break; 1949 } 1950 1951 1952 int32_t isSync = false; 1953 meta_data->findInt32(kKeyIsSyncFrame, &isSync); 1954 CHECK(meta_data->findInt64(kKeyTime, ×tampUs)); 1955 1956 //////////////////////////////////////////////////////////////////////////////// 1957 if (mNumSamples == 0) { 1958 mFirstSampleTimeRealUs = systemTime() / 1000; 1959 mStartTimestampUs = timestampUs; 1960 mOwner->setStartTimestampUs(mStartTimestampUs); 1961 previousPausedDurationUs = mStartTimestampUs; 1962 } 1963 1964 if (mResumed) { 1965 int64_t durExcludingEarlierPausesUs = timestampUs - previousPausedDurationUs; 1966 CHECK(durExcludingEarlierPausesUs >= 0); 1967 int64_t pausedDurationUs = durExcludingEarlierPausesUs - mTrackDurationUs; 1968 CHECK(pausedDurationUs >= lastDurationUs); 1969 previousPausedDurationUs += pausedDurationUs - lastDurationUs; 1970 mResumed = false; 1971 } 1972 1973 timestampUs -= previousPausedDurationUs; 1974 CHECK(timestampUs >= 0); 1975 if (!mIsAudio && hasBFrames) { 1976 /* 1977 * Composition time: timestampUs 1978 * Decoding time: decodingTimeUs 1979 * Composition time delta = composition time - decoding time 1980 * 1981 * We save picture decoding time stamp delta in stts table entries, 1982 * and composition time delta duration in ctts table entries. 1983 */ 1984 int64_t decodingTimeUs; 1985 CHECK(meta_data->findInt64(kKeyDecodingTime, &decodingTimeUs)); 1986 decodingTimeUs -= previousPausedDurationUs; 1987 int64_t timeUs = decodingTimeUs; 1988 cttsDeltaTimeUs = timestampUs - decodingTimeUs; 1989 timestampUs = decodingTimeUs; 1990 LOGV("decoding time: %lld and ctts delta time: %lld", 1991 timestampUs, cttsDeltaTimeUs); 1992 } 1993 1994 if (mIsRealTimeRecording) { 1995 if (mIsAudio) { 1996 updateDriftTime(meta_data); 1997 } 1998 } 1999 2000 CHECK(timestampUs >= 0); 2001 LOGV("%s media time stamp: %lld and previous paused duration %lld", 2002 mIsAudio? "Audio": "Video", timestampUs, previousPausedDurationUs); 2003 if (timestampUs > mTrackDurationUs) { 2004 mTrackDurationUs = timestampUs; 2005 } 2006 2007 // We need to use the time scale based ticks, rather than the 2008 // timestamp itself to determine whether we have to use a new 2009 // stts entry, since we may have rounding errors. 2010 // The calculation is intended to reduce the accumulated 2011 // rounding errors. 2012 currDurationTicks = 2013 ((timestampUs * mTimeScale + 500000LL) / 1000000LL - 2014 (lastTimestampUs * mTimeScale + 500000LL) / 1000000LL); 2015 2016 mSampleSizes.push_back(sampleSize); 2017 ++mNumSamples; 2018 if (mNumSamples > 2) { 2019 2020 // Force the first sample to have its own stts entry so that 2021 // we can adjust its value later to maintain the A/V sync. 2022 if (mNumSamples == 3 || currDurationTicks != lastDurationTicks) { 2023 LOGV("%s lastDurationUs: %lld us, currDurationTicks: %lld us", 2024 mIsAudio? "Audio": "Video", lastDurationUs, currDurationTicks); 2025 addOneSttsTableEntry(sampleCount, lastDurationTicks); 2026 sampleCount = 1; 2027 } else { 2028 ++sampleCount; 2029 } 2030 2031 if (!mIsAudio) { 2032 currCttsDurTicks = 2033 ((cttsDeltaTimeUs * mTimeScale + 500000LL) / 1000000LL - 2034 (lastCttsTimeUs * mTimeScale + 500000LL) / 1000000LL); 2035 if (currCttsDurTicks != lastCttsDurTicks) { 2036 addOneCttsTableEntry(cttsSampleCount, lastCttsDurTicks); 2037 cttsSampleCount = 1; 2038 } else { 2039 ++cttsSampleCount; 2040 } 2041 } 2042 } 2043 if (mSamplesHaveSameSize) { 2044 if (mNumSamples >= 2 && previousSampleSize != sampleSize) { 2045 mSamplesHaveSameSize = false; 2046 } 2047 previousSampleSize = sampleSize; 2048 } 2049 LOGV("%s timestampUs/lastTimestampUs: %lld/%lld", 2050 mIsAudio? "Audio": "Video", timestampUs, lastTimestampUs); 2051 lastDurationUs = timestampUs - lastTimestampUs; 2052 lastDurationTicks = currDurationTicks; 2053 lastTimestampUs = timestampUs; 2054 2055 if (!mIsAudio) { 2056 lastCttsDurTicks = currCttsDurTicks; 2057 lastCttsTimeUs = cttsDeltaTimeUs; 2058 } 2059 2060 if (isSync != 0) { 2061 addOneStssTableEntry(mNumSamples); 2062 } 2063 2064 if (mTrackingProgressStatus) { 2065 if (mPreviousTrackTimeUs <= 0) { 2066 mPreviousTrackTimeUs = mStartTimestampUs; 2067 } 2068 trackProgressStatus(timestampUs); 2069 } 2070 if (!hasMultipleTracks) { 2071 off64_t offset = mIsAvc? mOwner->addLengthPrefixedSample_l(copy) 2072 : mOwner->addSample_l(copy); 2073 if (mChunkOffsets.empty()) { 2074 addChunkOffset(offset); 2075 } 2076 copy->release(); 2077 copy = NULL; 2078 continue; 2079 } 2080 2081 mChunkSamples.push_back(copy); 2082 if (interleaveDurationUs == 0) { 2083 addOneStscTableEntry(++nChunks, 1); 2084 bufferChunk(timestampUs); 2085 } else { 2086 if (chunkTimestampUs == 0) { 2087 chunkTimestampUs = timestampUs; 2088 } else { 2089 int64_t chunkDurationUs = timestampUs - chunkTimestampUs; 2090 if (chunkDurationUs > interleaveDurationUs) { 2091 if (chunkDurationUs > mMaxChunkDurationUs) { 2092 mMaxChunkDurationUs = chunkDurationUs; 2093 } 2094 ++nChunks; 2095 if (nChunks == 1 || // First chunk 2096 (--(mStscTableEntries.end()))->samplesPerChunk != 2097 mChunkSamples.size()) { 2098 addOneStscTableEntry(nChunks, mChunkSamples.size()); 2099 } 2100 bufferChunk(timestampUs); 2101 chunkTimestampUs = timestampUs; 2102 } 2103 } 2104 } 2105 2106 } 2107 2108 if (isTrackMalFormed()) { 2109 err = ERROR_MALFORMED; 2110 } 2111 2112 mOwner->trackProgressStatus(mTrackId, -1, err); 2113 2114 // Last chunk 2115 if (!hasMultipleTracks) { 2116 addOneStscTableEntry(1, mNumSamples); 2117 } else if (!mChunkSamples.empty()) { 2118 addOneStscTableEntry(++nChunks, mChunkSamples.size()); 2119 bufferChunk(timestampUs); 2120 } 2121 2122 // We don't really know how long the last frame lasts, since 2123 // there is no frame time after it, just repeat the previous 2124 // frame's duration. 2125 if (mNumSamples == 1) { 2126 lastDurationUs = 0; // A single sample's duration 2127 lastDurationTicks = 0; 2128 lastCttsDurTicks = 0; 2129 } else { 2130 ++sampleCount; // Count for the last sample 2131 ++cttsSampleCount; 2132 } 2133 2134 if (mNumSamples <= 2) { 2135 addOneSttsTableEntry(1, lastDurationTicks); 2136 if (sampleCount - 1 > 0) { 2137 addOneSttsTableEntry(sampleCount - 1, lastDurationTicks); 2138 } 2139 } else { 2140 addOneSttsTableEntry(sampleCount, lastDurationTicks); 2141 } 2142 2143 addOneCttsTableEntry(cttsSampleCount, lastCttsDurTicks); 2144 mTrackDurationUs += lastDurationUs; 2145 mReachedEOS = true; 2146 2147 sendTrackSummary(hasMultipleTracks); 2148 2149 LOGI("Received total/0-length (%d/%d) buffers and encoded %d frames. - %s", 2150 count, nZeroLengthFrames, mNumSamples, mIsAudio? "audio": "video"); 2151 if (mIsAudio) { 2152 LOGI("Audio track drift time: %lld us", mOwner->getDriftTimeUs()); 2153 } 2154 2155 if (err == ERROR_END_OF_STREAM) { 2156 return OK; 2157 } 2158 return err; 2159 } 2160 2161 bool MPEG4Writer::Track::isTrackMalFormed() const { 2162 if (mSampleSizes.empty()) { // no samples written 2163 LOGE("The number of recorded samples is 0"); 2164 return true; 2165 } 2166 2167 if (!mIsAudio && mNumStssTableEntries == 0) { // no sync frames for video 2168 LOGE("There are no sync frames for video track"); 2169 return true; 2170 } 2171 2172 if (OK != checkCodecSpecificData()) { // no codec specific data 2173 return true; 2174 } 2175 2176 return false; 2177 } 2178 2179 void MPEG4Writer::Track::sendTrackSummary(bool hasMultipleTracks) { 2180 2181 // Send track summary only if test mode is enabled. 2182 if (!isTestModeEnabled()) { 2183 return; 2184 } 2185 2186 int trackNum = (mTrackId << 28); 2187 2188 mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2189 trackNum | MEDIA_RECORDER_TRACK_INFO_TYPE, 2190 mIsAudio? 0: 1); 2191 2192 mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2193 trackNum | MEDIA_RECORDER_TRACK_INFO_DURATION_MS, 2194 mTrackDurationUs / 1000); 2195 2196 mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2197 trackNum | MEDIA_RECORDER_TRACK_INFO_ENCODED_FRAMES, 2198 mNumSamples); 2199 2200 { 2201 // The system delay time excluding the requested initial delay that 2202 // is used to eliminate the recording sound. 2203 int64_t startTimeOffsetUs = mOwner->getStartTimeOffsetMs() * 1000LL; 2204 if (startTimeOffsetUs < 0) { // Start time offset was not set 2205 startTimeOffsetUs = kInitialDelayTimeUs; 2206 } 2207 int64_t initialDelayUs = 2208 mFirstSampleTimeRealUs - mStartTimeRealUs - startTimeOffsetUs; 2209 2210 mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2211 trackNum | MEDIA_RECORDER_TRACK_INFO_INITIAL_DELAY_MS, 2212 (initialDelayUs) / 1000); 2213 } 2214 2215 mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2216 trackNum | MEDIA_RECORDER_TRACK_INFO_DATA_KBYTES, 2217 mMdatSizeBytes / 1024); 2218 2219 if (hasMultipleTracks) { 2220 mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2221 trackNum | MEDIA_RECORDER_TRACK_INFO_MAX_CHUNK_DUR_MS, 2222 mMaxChunkDurationUs / 1000); 2223 2224 int64_t moovStartTimeUs = mOwner->getStartTimestampUs(); 2225 if (mStartTimestampUs != moovStartTimeUs) { 2226 int64_t startTimeOffsetUs = mStartTimestampUs - moovStartTimeUs; 2227 mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2228 trackNum | MEDIA_RECORDER_TRACK_INFO_START_OFFSET_MS, 2229 startTimeOffsetUs / 1000); 2230 } 2231 } 2232 } 2233 2234 void MPEG4Writer::Track::trackProgressStatus(int64_t timeUs, status_t err) { 2235 LOGV("trackProgressStatus: %lld us", timeUs); 2236 if (mTrackEveryTimeDurationUs > 0 && 2237 timeUs - mPreviousTrackTimeUs >= mTrackEveryTimeDurationUs) { 2238 LOGV("Fire time tracking progress status at %lld us", timeUs); 2239 mOwner->trackProgressStatus(mTrackId, timeUs - mPreviousTrackTimeUs, err); 2240 mPreviousTrackTimeUs = timeUs; 2241 } 2242 } 2243 2244 void MPEG4Writer::trackProgressStatus( 2245 size_t trackId, int64_t timeUs, status_t err) { 2246 Mutex::Autolock lock(mLock); 2247 int32_t trackNum = (trackId << 28); 2248 2249 // Error notification 2250 // Do not consider ERROR_END_OF_STREAM an error 2251 if (err != OK && err != ERROR_END_OF_STREAM) { 2252 notify(MEDIA_RECORDER_TRACK_EVENT_ERROR, 2253 trackNum | MEDIA_RECORDER_TRACK_ERROR_GENERAL, 2254 err); 2255 return; 2256 } 2257 2258 if (timeUs == -1) { 2259 // Send completion notification 2260 notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2261 trackNum | MEDIA_RECORDER_TRACK_INFO_COMPLETION_STATUS, 2262 err); 2263 } else { 2264 // Send progress status 2265 notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2266 trackNum | MEDIA_RECORDER_TRACK_INFO_PROGRESS_IN_TIME, 2267 timeUs / 1000); 2268 } 2269 } 2270 2271 void MPEG4Writer::setDriftTimeUs(int64_t driftTimeUs) { 2272 LOGV("setDriftTimeUs: %lld us", driftTimeUs); 2273 Mutex::Autolock autolock(mLock); 2274 mDriftTimeUs = driftTimeUs; 2275 } 2276 2277 int64_t MPEG4Writer::getDriftTimeUs() { 2278 LOGV("getDriftTimeUs: %lld us", mDriftTimeUs); 2279 Mutex::Autolock autolock(mLock); 2280 return mDriftTimeUs; 2281 } 2282 2283 bool MPEG4Writer::useNalLengthFour() { 2284 return mUse4ByteNalLength; 2285 } 2286 2287 void MPEG4Writer::Track::bufferChunk(int64_t timestampUs) { 2288 LOGV("bufferChunk"); 2289 2290 Chunk chunk(this, timestampUs, mChunkSamples); 2291 mOwner->bufferChunk(chunk); 2292 mChunkSamples.clear(); 2293 } 2294 2295 int64_t MPEG4Writer::Track::getDurationUs() const { 2296 return mTrackDurationUs; 2297 } 2298 2299 int64_t MPEG4Writer::Track::getEstimatedTrackSizeBytes() const { 2300 return mEstimatedTrackSizeBytes; 2301 } 2302 2303 status_t MPEG4Writer::Track::checkCodecSpecificData() const { 2304 const char *mime; 2305 CHECK(mMeta->findCString(kKeyMIMEType, &mime)); 2306 if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AAC, mime) || 2307 !strcasecmp(MEDIA_MIMETYPE_VIDEO_MPEG4, mime) || 2308 !strcasecmp(MEDIA_MIMETYPE_VIDEO_AVC, mime)) { 2309 if (!mCodecSpecificData || 2310 mCodecSpecificDataSize <= 0) { 2311 LOGE("Missing codec specific data"); 2312 return ERROR_MALFORMED; 2313 } 2314 } else { 2315 if (mCodecSpecificData || 2316 mCodecSpecificDataSize > 0) { 2317 LOGE("Unexepected codec specific data found"); 2318 return ERROR_MALFORMED; 2319 } 2320 } 2321 return OK; 2322 } 2323 2324 void MPEG4Writer::Track::writeTrackHeader(bool use32BitOffset) { 2325 2326 LOGV("%s track time scale: %d", 2327 mIsAudio? "Audio": "Video", mTimeScale); 2328 2329 time_t now = time(NULL); 2330 mOwner->beginBox("trak"); 2331 writeTkhdBox(now); 2332 mOwner->beginBox("mdia"); 2333 writeMdhdBox(now); 2334 writeHdlrBox(); 2335 mOwner->beginBox("minf"); 2336 if (mIsAudio) { 2337 writeSmhdBox(); 2338 } else { 2339 writeVmhdBox(); 2340 } 2341 writeDinfBox(); 2342 writeStblBox(use32BitOffset); 2343 mOwner->endBox(); // minf 2344 mOwner->endBox(); // mdia 2345 mOwner->endBox(); // trak 2346 } 2347 2348 void MPEG4Writer::Track::writeStblBox(bool use32BitOffset) { 2349 mOwner->beginBox("stbl"); 2350 mOwner->beginBox("stsd"); 2351 mOwner->writeInt32(0); // version=0, flags=0 2352 mOwner->writeInt32(1); // entry count 2353 if (mIsAudio) { 2354 writeAudioFourCCBox(); 2355 } else { 2356 writeVideoFourCCBox(); 2357 } 2358 mOwner->endBox(); // stsd 2359 writeSttsBox(); 2360 writeCttsBox(); 2361 if (!mIsAudio) { 2362 writeStssBox(); 2363 } 2364 writeStszBox(); 2365 writeStscBox(); 2366 writeStcoBox(use32BitOffset); 2367 mOwner->endBox(); // stbl 2368 } 2369 2370 void MPEG4Writer::Track::writeVideoFourCCBox() { 2371 const char *mime; 2372 bool success = mMeta->findCString(kKeyMIMEType, &mime); 2373 CHECK(success); 2374 if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_MPEG4, mime)) { 2375 mOwner->beginBox("mp4v"); 2376 } else if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_H263, mime)) { 2377 mOwner->beginBox("s263"); 2378 } else if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_AVC, mime)) { 2379 mOwner->beginBox("avc1"); 2380 } else { 2381 LOGE("Unknown mime type '%s'.", mime); 2382 CHECK(!"should not be here, unknown mime type."); 2383 } 2384 2385 mOwner->writeInt32(0); // reserved 2386 mOwner->writeInt16(0); // reserved 2387 mOwner->writeInt16(1); // data ref index 2388 mOwner->writeInt16(0); // predefined 2389 mOwner->writeInt16(0); // reserved 2390 mOwner->writeInt32(0); // predefined 2391 mOwner->writeInt32(0); // predefined 2392 mOwner->writeInt32(0); // predefined 2393 2394 int32_t width, height; 2395 success = mMeta->findInt32(kKeyWidth, &width); 2396 success = success && mMeta->findInt32(kKeyHeight, &height); 2397 CHECK(success); 2398 2399 mOwner->writeInt16(width); 2400 mOwner->writeInt16(height); 2401 mOwner->writeInt32(0x480000); // horiz resolution 2402 mOwner->writeInt32(0x480000); // vert resolution 2403 mOwner->writeInt32(0); // reserved 2404 mOwner->writeInt16(1); // frame count 2405 mOwner->write(" ", 32); 2406 mOwner->writeInt16(0x18); // depth 2407 mOwner->writeInt16(-1); // predefined 2408 2409 CHECK(23 + mCodecSpecificDataSize < 128); 2410 2411 if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_MPEG4, mime)) { 2412 writeMp4vEsdsBox(); 2413 } else if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_H263, mime)) { 2414 writeD263Box(); 2415 } else if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_AVC, mime)) { 2416 writeAvccBox(); 2417 } 2418 2419 writePaspBox(); 2420 mOwner->endBox(); // mp4v, s263 or avc1 2421 } 2422 2423 void MPEG4Writer::Track::writeAudioFourCCBox() { 2424 const char *mime; 2425 bool success = mMeta->findCString(kKeyMIMEType, &mime); 2426 CHECK(success); 2427 const char *fourcc = NULL; 2428 if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AMR_NB, mime)) { 2429 fourcc = "samr"; 2430 } else if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AMR_WB, mime)) { 2431 fourcc = "sawb"; 2432 } else if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AAC, mime)) { 2433 fourcc = "mp4a"; 2434 } else { 2435 LOGE("Unknown mime type '%s'.", mime); 2436 CHECK(!"should not be here, unknown mime type."); 2437 } 2438 2439 mOwner->beginBox(fourcc); // audio format 2440 mOwner->writeInt32(0); // reserved 2441 mOwner->writeInt16(0); // reserved 2442 mOwner->writeInt16(0x1); // data ref index 2443 mOwner->writeInt32(0); // reserved 2444 mOwner->writeInt32(0); // reserved 2445 int32_t nChannels; 2446 CHECK_EQ(true, mMeta->findInt32(kKeyChannelCount, &nChannels)); 2447 mOwner->writeInt16(nChannels); // channel count 2448 mOwner->writeInt16(16); // sample size 2449 mOwner->writeInt16(0); // predefined 2450 mOwner->writeInt16(0); // reserved 2451 2452 int32_t samplerate; 2453 success = mMeta->findInt32(kKeySampleRate, &samplerate); 2454 CHECK(success); 2455 mOwner->writeInt32(samplerate << 16); 2456 if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AAC, mime)) { 2457 writeMp4aEsdsBox(); 2458 } else if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AMR_NB, mime) || 2459 !strcasecmp(MEDIA_MIMETYPE_AUDIO_AMR_WB, mime)) { 2460 writeDamrBox(); 2461 } 2462 mOwner->endBox(); 2463 } 2464 2465 void MPEG4Writer::Track::writeMp4aEsdsBox() { 2466 mOwner->beginBox("esds"); 2467 CHECK(mCodecSpecificData); 2468 CHECK(mCodecSpecificDataSize > 0); 2469 2470 // Make sure all sizes encode to a single byte. 2471 CHECK(mCodecSpecificDataSize + 23 < 128); 2472 2473 mOwner->writeInt32(0); // version=0, flags=0 2474 mOwner->writeInt8(0x03); // ES_DescrTag 2475 mOwner->writeInt8(23 + mCodecSpecificDataSize); 2476 mOwner->writeInt16(0x0000);// ES_ID 2477 mOwner->writeInt8(0x00); 2478 2479 mOwner->writeInt8(0x04); // DecoderConfigDescrTag 2480 mOwner->writeInt8(15 + mCodecSpecificDataSize); 2481 mOwner->writeInt8(0x40); // objectTypeIndication ISO/IEC 14492-2 2482 mOwner->writeInt8(0x15); // streamType AudioStream 2483 2484 mOwner->writeInt16(0x03); // XXX 2485 mOwner->writeInt8(0x00); // buffer size 24-bit 2486 mOwner->writeInt32(96000); // max bit rate 2487 mOwner->writeInt32(96000); // avg bit rate 2488 2489 mOwner->writeInt8(0x05); // DecoderSpecificInfoTag 2490 mOwner->writeInt8(mCodecSpecificDataSize); 2491 mOwner->write(mCodecSpecificData, mCodecSpecificDataSize); 2492 2493 static const uint8_t kData2[] = { 2494 0x06, // SLConfigDescriptorTag 2495 0x01, 2496 0x02 2497 }; 2498 mOwner->write(kData2, sizeof(kData2)); 2499 2500 mOwner->endBox(); // esds 2501 } 2502 2503 void MPEG4Writer::Track::writeMp4vEsdsBox() { 2504 CHECK(mCodecSpecificData); 2505 CHECK(mCodecSpecificDataSize > 0); 2506 mOwner->beginBox("esds"); 2507 2508 mOwner->writeInt32(0); // version=0, flags=0 2509 2510 mOwner->writeInt8(0x03); // ES_DescrTag 2511 mOwner->writeInt8(23 + mCodecSpecificDataSize); 2512 mOwner->writeInt16(0x0000); // ES_ID 2513 mOwner->writeInt8(0x1f); 2514 2515 mOwner->writeInt8(0x04); // DecoderConfigDescrTag 2516 mOwner->writeInt8(15 + mCodecSpecificDataSize); 2517 mOwner->writeInt8(0x20); // objectTypeIndication ISO/IEC 14492-2 2518 mOwner->writeInt8(0x11); // streamType VisualStream 2519 2520 static const uint8_t kData[] = { 2521 0x01, 0x77, 0x00, 2522 0x00, 0x03, 0xe8, 0x00, 2523 0x00, 0x03, 0xe8, 0x00 2524 }; 2525 mOwner->write(kData, sizeof(kData)); 2526 2527 mOwner->writeInt8(0x05); // DecoderSpecificInfoTag 2528 2529 mOwner->writeInt8(mCodecSpecificDataSize); 2530 mOwner->write(mCodecSpecificData, mCodecSpecificDataSize); 2531 2532 static const uint8_t kData2[] = { 2533 0x06, // SLConfigDescriptorTag 2534 0x01, 2535 0x02 2536 }; 2537 mOwner->write(kData2, sizeof(kData2)); 2538 2539 mOwner->endBox(); // esds 2540 } 2541 2542 void MPEG4Writer::Track::writeTkhdBox(time_t now) { 2543 mOwner->beginBox("tkhd"); 2544 // Flags = 7 to indicate that the track is enabled, and 2545 // part of the presentation 2546 mOwner->writeInt32(0x07); // version=0, flags=7 2547 mOwner->writeInt32(now); // creation time 2548 mOwner->writeInt32(now); // modification time 2549 mOwner->writeInt32(mTrackId + 1); // track id starts with 1 2550 mOwner->writeInt32(0); // reserved 2551 int64_t trakDurationUs = getDurationUs(); 2552 int32_t mvhdTimeScale = mOwner->getTimeScale(); 2553 int32_t tkhdDuration = 2554 (trakDurationUs * mvhdTimeScale + 5E5) / 1E6; 2555 mOwner->writeInt32(tkhdDuration); // in mvhd timescale 2556 mOwner->writeInt32(0); // reserved 2557 mOwner->writeInt32(0); // reserved 2558 mOwner->writeInt16(0); // layer 2559 mOwner->writeInt16(0); // alternate group 2560 mOwner->writeInt16(mIsAudio ? 0x100 : 0); // volume 2561 mOwner->writeInt16(0); // reserved 2562 2563 mOwner->writeCompositionMatrix(mRotation); // matrix 2564 2565 if (mIsAudio) { 2566 mOwner->writeInt32(0); 2567 mOwner->writeInt32(0); 2568 } else { 2569 int32_t width, height; 2570 bool success = mMeta->findInt32(kKeyWidth, &width); 2571 success = success && mMeta->findInt32(kKeyHeight, &height); 2572 CHECK(success); 2573 2574 mOwner->writeInt32(width << 16); // 32-bit fixed-point value 2575 mOwner->writeInt32(height << 16); // 32-bit fixed-point value 2576 } 2577 mOwner->endBox(); // tkhd 2578 } 2579 2580 void MPEG4Writer::Track::writeVmhdBox() { 2581 mOwner->beginBox("vmhd"); 2582 mOwner->writeInt32(0x01); // version=0, flags=1 2583 mOwner->writeInt16(0); // graphics mode 2584 mOwner->writeInt16(0); // opcolor 2585 mOwner->writeInt16(0); 2586 mOwner->writeInt16(0); 2587 mOwner->endBox(); 2588 } 2589 2590 void MPEG4Writer::Track::writeSmhdBox() { 2591 mOwner->beginBox("smhd"); 2592 mOwner->writeInt32(0); // version=0, flags=0 2593 mOwner->writeInt16(0); // balance 2594 mOwner->writeInt16(0); // reserved 2595 mOwner->endBox(); 2596 } 2597 2598 void MPEG4Writer::Track::writeHdlrBox() { 2599 mOwner->beginBox("hdlr"); 2600 mOwner->writeInt32(0); // version=0, flags=0 2601 mOwner->writeInt32(0); // component type: should be mhlr 2602 mOwner->writeFourcc(mIsAudio ? "soun" : "vide"); // component subtype 2603 mOwner->writeInt32(0); // reserved 2604 mOwner->writeInt32(0); // reserved 2605 mOwner->writeInt32(0); // reserved 2606 // Removing "r" for the name string just makes the string 4 byte aligned 2607 mOwner->writeCString(mIsAudio ? "SoundHandle": "VideoHandle"); // name 2608 mOwner->endBox(); 2609 } 2610 2611 void MPEG4Writer::Track::writeMdhdBox(time_t now) { 2612 int64_t trakDurationUs = getDurationUs(); 2613 mOwner->beginBox("mdhd"); 2614 mOwner->writeInt32(0); // version=0, flags=0 2615 mOwner->writeInt32(now); // creation time 2616 mOwner->writeInt32(now); // modification time 2617 mOwner->writeInt32(mTimeScale); // media timescale 2618 int32_t mdhdDuration = (trakDurationUs * mTimeScale + 5E5) / 1E6; 2619 mOwner->writeInt32(mdhdDuration); // use media timescale 2620 // Language follows the three letter standard ISO-639-2/T 2621 // 'e', 'n', 'g' for "English", for instance. 2622 // Each character is packed as the difference between its ASCII value and 0x60. 2623 // For "English", these are 00101, 01110, 00111. 2624 // XXX: Where is the padding bit located: 0x15C7? 2625 mOwner->writeInt16(0); // language code 2626 mOwner->writeInt16(0); // predefined 2627 mOwner->endBox(); 2628 } 2629 2630 void MPEG4Writer::Track::writeDamrBox() { 2631 // 3gpp2 Spec AMRSampleEntry fields 2632 mOwner->beginBox("damr"); 2633 mOwner->writeCString(" "); // vendor: 4 bytes 2634 mOwner->writeInt8(0); // decoder version 2635 mOwner->writeInt16(0x83FF); // mode set: all enabled 2636 mOwner->writeInt8(0); // mode change period 2637 mOwner->writeInt8(1); // frames per sample 2638 mOwner->endBox(); 2639 } 2640 2641 void MPEG4Writer::Track::writeUrlBox() { 2642 // The table index here refers to the sample description index 2643 // in the sample table entries. 2644 mOwner->beginBox("url "); 2645 mOwner->writeInt32(1); // version=0, flags=1 (self-contained) 2646 mOwner->endBox(); // url 2647 } 2648 2649 void MPEG4Writer::Track::writeDrefBox() { 2650 mOwner->beginBox("dref"); 2651 mOwner->writeInt32(0); // version=0, flags=0 2652 mOwner->writeInt32(1); // entry count (either url or urn) 2653 writeUrlBox(); 2654 mOwner->endBox(); // dref 2655 } 2656 2657 void MPEG4Writer::Track::writeDinfBox() { 2658 mOwner->beginBox("dinf"); 2659 writeDrefBox(); 2660 mOwner->endBox(); // dinf 2661 } 2662 2663 void MPEG4Writer::Track::writeAvccBox() { 2664 CHECK(mCodecSpecificData); 2665 CHECK(mCodecSpecificDataSize >= 5); 2666 2667 // Patch avcc's lengthSize field to match the number 2668 // of bytes we use to indicate the size of a nal unit. 2669 uint8_t *ptr = (uint8_t *)mCodecSpecificData; 2670 ptr[4] = (ptr[4] & 0xfc) | (mOwner->useNalLengthFour() ? 3 : 1); 2671 mOwner->beginBox("avcC"); 2672 mOwner->write(mCodecSpecificData, mCodecSpecificDataSize); 2673 mOwner->endBox(); // avcC 2674 } 2675 2676 void MPEG4Writer::Track::writeD263Box() { 2677 mOwner->beginBox("d263"); 2678 mOwner->writeInt32(0); // vendor 2679 mOwner->writeInt8(0); // decoder version 2680 mOwner->writeInt8(10); // level: 10 2681 mOwner->writeInt8(0); // profile: 0 2682 mOwner->endBox(); // d263 2683 } 2684 2685 // This is useful if the pixel is not square 2686 void MPEG4Writer::Track::writePaspBox() { 2687 mOwner->beginBox("pasp"); 2688 mOwner->writeInt32(1 << 16); // hspacing 2689 mOwner->writeInt32(1 << 16); // vspacing 2690 mOwner->endBox(); // pasp 2691 } 2692 2693 void MPEG4Writer::Track::writeSttsBox() { 2694 mOwner->beginBox("stts"); 2695 mOwner->writeInt32(0); // version=0, flags=0 2696 mOwner->writeInt32(mNumSttsTableEntries); 2697 2698 // Compensate for small start time difference from different media tracks 2699 int64_t trackStartTimeOffsetUs = 0; 2700 int64_t moovStartTimeUs = mOwner->getStartTimestampUs(); 2701 if (mStartTimestampUs != moovStartTimeUs) { 2702 CHECK(mStartTimestampUs > moovStartTimeUs); 2703 trackStartTimeOffsetUs = mStartTimestampUs - moovStartTimeUs; 2704 } 2705 List<SttsTableEntry>::iterator it = mSttsTableEntries.begin(); 2706 CHECK(it != mSttsTableEntries.end() && it->sampleCount == 1); 2707 mOwner->writeInt32(it->sampleCount); 2708 int32_t dur = (trackStartTimeOffsetUs * mTimeScale + 500000LL) / 1000000LL; 2709 mOwner->writeInt32(dur + it->sampleDuration); 2710 2711 int64_t totalCount = 1; 2712 while (++it != mSttsTableEntries.end()) { 2713 mOwner->writeInt32(it->sampleCount); 2714 mOwner->writeInt32(it->sampleDuration); 2715 totalCount += it->sampleCount; 2716 } 2717 CHECK(totalCount == mNumSamples); 2718 mOwner->endBox(); // stts 2719 } 2720 2721 void MPEG4Writer::Track::writeCttsBox() { 2722 if (mIsAudio) { // ctts is not for audio 2723 return; 2724 } 2725 2726 // Do not write ctts box when there is no need to have it. 2727 if ((mNumCttsTableEntries == 1 && 2728 mCttsTableEntries.begin()->sampleDuration == 0) || 2729 mNumCttsTableEntries == 0) { 2730 return; 2731 } 2732 2733 LOGV("ctts box has %d entries", mNumCttsTableEntries); 2734 2735 mOwner->beginBox("ctts"); 2736 if (mHasNegativeCttsDeltaDuration) { 2737 mOwner->writeInt32(0x00010000); // version=1, flags=0 2738 } else { 2739 mOwner->writeInt32(0); // version=0, flags=0 2740 } 2741 mOwner->writeInt32(mNumCttsTableEntries); 2742 2743 int64_t totalCount = 0; 2744 for (List<CttsTableEntry>::iterator it = mCttsTableEntries.begin(); 2745 it != mCttsTableEntries.end(); ++it) { 2746 mOwner->writeInt32(it->sampleCount); 2747 mOwner->writeInt32(it->sampleDuration); 2748 totalCount += it->sampleCount; 2749 } 2750 CHECK(totalCount == mNumSamples); 2751 mOwner->endBox(); // ctts 2752 } 2753 2754 void MPEG4Writer::Track::writeStssBox() { 2755 mOwner->beginBox("stss"); 2756 mOwner->writeInt32(0); // version=0, flags=0 2757 mOwner->writeInt32(mNumStssTableEntries); // number of sync frames 2758 for (List<int32_t>::iterator it = mStssTableEntries.begin(); 2759 it != mStssTableEntries.end(); ++it) { 2760 mOwner->writeInt32(*it); 2761 } 2762 mOwner->endBox(); // stss 2763 } 2764 2765 void MPEG4Writer::Track::writeStszBox() { 2766 mOwner->beginBox("stsz"); 2767 mOwner->writeInt32(0); // version=0, flags=0 2768 if (mSamplesHaveSameSize) { 2769 List<size_t>::iterator it = mSampleSizes.begin(); 2770 mOwner->writeInt32(*it); // default sample size 2771 } else { 2772 mOwner->writeInt32(0); 2773 } 2774 mOwner->writeInt32(mNumSamples); 2775 if (!mSamplesHaveSameSize) { 2776 for (List<size_t>::iterator it = mSampleSizes.begin(); 2777 it != mSampleSizes.end(); ++it) { 2778 mOwner->writeInt32(*it); 2779 } 2780 } 2781 mOwner->endBox(); // stsz 2782 } 2783 2784 void MPEG4Writer::Track::writeStscBox() { 2785 mOwner->beginBox("stsc"); 2786 mOwner->writeInt32(0); // version=0, flags=0 2787 mOwner->writeInt32(mNumStscTableEntries); 2788 for (List<StscTableEntry>::iterator it = mStscTableEntries.begin(); 2789 it != mStscTableEntries.end(); ++it) { 2790 mOwner->writeInt32(it->firstChunk); 2791 mOwner->writeInt32(it->samplesPerChunk); 2792 mOwner->writeInt32(it->sampleDescriptionId); 2793 } 2794 mOwner->endBox(); // stsc 2795 } 2796 2797 void MPEG4Writer::Track::writeStcoBox(bool use32BitOffset) { 2798 mOwner->beginBox(use32BitOffset? "stco": "co64"); 2799 mOwner->writeInt32(0); // version=0, flags=0 2800 mOwner->writeInt32(mNumStcoTableEntries); 2801 for (List<off64_t>::iterator it = mChunkOffsets.begin(); 2802 it != mChunkOffsets.end(); ++it) { 2803 if (use32BitOffset) { 2804 mOwner->writeInt32(static_cast<int32_t>(*it)); 2805 } else { 2806 mOwner->writeInt64((*it)); 2807 } 2808 } 2809 mOwner->endBox(); // stco or co64 2810 } 2811 2812 void MPEG4Writer::writeUdtaBox() { 2813 beginBox("udta"); 2814 writeGeoDataBox(); 2815 endBox(); 2816 } 2817 2818 /* 2819 * Geodata is stored according to ISO-6709 standard. 2820 */ 2821 void MPEG4Writer::writeGeoDataBox() { 2822 beginBox("\xA9xyz"); 2823 /* 2824 * For historical reasons, any user data start 2825 * with "\0xA9", must be followed by its assoicated 2826 * language code. 2827 * 0x0012: text string length 2828 * 0x15c7: lang (locale) code: en 2829 */ 2830 writeInt32(0x001215c7); 2831 writeLatitude(mLatitudex10000); 2832 writeLongitude(mLongitudex10000); 2833 writeInt8(0x2F); 2834 endBox(); 2835 } 2836 2837 } // namespace android 2838
