MPEG4Writer.cpp revision 68189471332964a65f0d1f47cda7724c562c566d
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/foundation/ADebug.h> 27#include <media/stagefright/MPEG4Writer.h> 28#include <media/stagefright/MediaBuffer.h> 29#include <media/stagefright/MetaData.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 43namespace android { 44 45static const int64_t kMinStreamableFileSizeInBytes = 5 * 1024 * 1024; 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 51class MPEG4Writer::Track { 52public: 53 Track(MPEG4Writer *owner, const sp<MediaSource> &source, size_t trackId); 54 55 ~Track(); 56 57 status_t start(MetaData *params); 58 status_t stop(); 59 status_t pause(); 60 bool reachedEOS(); 61 62 int64_t getDurationUs() const; 63 int64_t getEstimatedTrackSizeBytes() const; 64 void writeTrackHeader(bool use32BitOffset = true); 65 void bufferChunk(int64_t timestampUs); 66 bool isAvc() const { return mIsAvc; } 67 bool isAudio() const { return mIsAudio; } 68 bool isMPEG4() const { return mIsMPEG4; } 69 void addChunkOffset(off64_t offset); 70 int32_t getTrackId() const { return mTrackId; } 71 status_t dump(int fd, const Vector<String16>& args) const; 72 73private: 74 enum { 75 kMaxCttsOffsetTimeUs = 1000000LL, // 1 second 76 kSampleArraySize = 1000, 77 }; 78 79 // A helper class to handle faster write box with table entries 80 template<class TYPE> 81 struct ListTableEntries { 82 ListTableEntries(uint32_t elementCapacity, uint32_t entryCapacity) 83 : mElementCapacity(elementCapacity), 84 mEntryCapacity(entryCapacity), 85 mTotalNumTableEntries(0), 86 mNumValuesInCurrEntry(0), 87 mCurrTableEntriesElement(NULL) { 88 CHECK_GT(mElementCapacity, 0); 89 CHECK_GT(mEntryCapacity, 0); 90 } 91 92 // Free the allocated memory. 93 ~ListTableEntries() { 94 while (!mTableEntryList.empty()) { 95 typename List<TYPE *>::iterator it = mTableEntryList.begin(); 96 delete[] (*it); 97 mTableEntryList.erase(it); 98 } 99 } 100 101 // Replace the value at the given position by the given value. 102 // There must be an existing value at the given position. 103 // @arg value must be in network byte order 104 // @arg pos location the value must be in. 105 void set(const TYPE& value, uint32_t pos) { 106 CHECK_LT(pos, mTotalNumTableEntries * mEntryCapacity); 107 108 typename List<TYPE *>::iterator it = mTableEntryList.begin(); 109 uint32_t iterations = (pos / (mElementCapacity * mEntryCapacity)); 110 while (it != mTableEntryList.end() && iterations > 0) { 111 ++it; 112 --iterations; 113 } 114 CHECK(it != mTableEntryList.end()); 115 CHECK_EQ(iterations, 0); 116 117 (*it)[(pos % (mElementCapacity * mEntryCapacity))] = value; 118 } 119 120 // Get the value at the given position by the given value. 121 // @arg value the retrieved value at the position in network byte order. 122 // @arg pos location the value must be in. 123 // @return true if a value is found. 124 bool get(TYPE& value, uint32_t pos) const { 125 if (pos >= mTotalNumTableEntries * mEntryCapacity) { 126 return false; 127 } 128 129 typename List<TYPE *>::iterator it = mTableEntryList.begin(); 130 uint32_t iterations = (pos / (mElementCapacity * mEntryCapacity)); 131 while (it != mTableEntryList.end() && iterations > 0) { 132 ++it; 133 --iterations; 134 } 135 CHECK(it != mTableEntryList.end()); 136 CHECK_EQ(iterations, 0); 137 138 value = (*it)[(pos % (mElementCapacity * mEntryCapacity))]; 139 return true; 140 } 141 142 // Store a single value. 143 // @arg value must be in network byte order. 144 void add(const TYPE& value) { 145 CHECK_LT(mNumValuesInCurrEntry, mElementCapacity); 146 uint32_t nEntries = mTotalNumTableEntries % mElementCapacity; 147 uint32_t nValues = mNumValuesInCurrEntry % mEntryCapacity; 148 if (nEntries == 0 && nValues == 0) { 149 mCurrTableEntriesElement = new TYPE[mEntryCapacity * mElementCapacity]; 150 CHECK(mCurrTableEntriesElement != NULL); 151 mTableEntryList.push_back(mCurrTableEntriesElement); 152 } 153 154 uint32_t pos = nEntries * mEntryCapacity + nValues; 155 mCurrTableEntriesElement[pos] = value; 156 157 ++mNumValuesInCurrEntry; 158 if ((mNumValuesInCurrEntry % mEntryCapacity) == 0) { 159 ++mTotalNumTableEntries; 160 mNumValuesInCurrEntry = 0; 161 } 162 } 163 164 // Write out the table entries: 165 // 1. the number of entries goes first 166 // 2. followed by the values in the table enties in order 167 // @arg writer the writer to actual write to the storage 168 void write(MPEG4Writer *writer) const { 169 CHECK_EQ(mNumValuesInCurrEntry % mEntryCapacity, 0); 170 uint32_t nEntries = mTotalNumTableEntries; 171 writer->writeInt32(nEntries); 172 for (typename List<TYPE *>::iterator it = mTableEntryList.begin(); 173 it != mTableEntryList.end(); ++it) { 174 CHECK_GT(nEntries, 0); 175 if (nEntries >= mElementCapacity) { 176 writer->write(*it, sizeof(TYPE) * mEntryCapacity, mElementCapacity); 177 nEntries -= mElementCapacity; 178 } else { 179 writer->write(*it, sizeof(TYPE) * mEntryCapacity, nEntries); 180 break; 181 } 182 } 183 } 184 185 // Return the number of entries in the table. 186 uint32_t count() const { return mTotalNumTableEntries; } 187 188 private: 189 uint32_t mElementCapacity; // # entries in an element 190 uint32_t mEntryCapacity; // # of values in each entry 191 uint32_t mTotalNumTableEntries; 192 uint32_t mNumValuesInCurrEntry; // up to mEntryCapacity 193 TYPE *mCurrTableEntriesElement; 194 mutable List<TYPE *> mTableEntryList; 195 196 DISALLOW_EVIL_CONSTRUCTORS(ListTableEntries); 197 }; 198 199 200 201 MPEG4Writer *mOwner; 202 sp<MetaData> mMeta; 203 sp<MediaSource> mSource; 204 volatile bool mDone; 205 volatile bool mPaused; 206 volatile bool mResumed; 207 volatile bool mStarted; 208 bool mIsAvc; 209 bool mIsAudio; 210 bool mIsMPEG4; 211 int32_t mTrackId; 212 int64_t mTrackDurationUs; 213 int64_t mMaxChunkDurationUs; 214 215 bool mIsRealTimeRecording; 216 int64_t mEstimatedTrackSizeBytes; 217 int64_t mMdatSizeBytes; 218 int32_t mTimeScale; 219 220 pthread_t mThread; 221 222 223 List<MediaBuffer *> mChunkSamples; 224 225 bool mSamplesHaveSameSize; 226 ListTableEntries<uint32_t> *mStszTableEntries; 227 228 ListTableEntries<uint32_t> *mStcoTableEntries; 229 ListTableEntries<off64_t> *mCo64TableEntries; 230 ListTableEntries<uint32_t> *mStscTableEntries; 231 ListTableEntries<uint32_t> *mStssTableEntries; 232 ListTableEntries<uint32_t> *mSttsTableEntries; 233 ListTableEntries<uint32_t> *mCttsTableEntries; 234 235 int64_t mMinCttsOffsetTimeUs; 236 int64_t mMaxCttsOffsetTimeUs; 237 238 // Sequence parameter set or picture parameter set 239 struct AVCParamSet { 240 AVCParamSet(uint16_t length, const uint8_t *data) 241 : mLength(length), mData(data) {} 242 243 uint16_t mLength; 244 const uint8_t *mData; 245 }; 246 List<AVCParamSet> mSeqParamSets; 247 List<AVCParamSet> mPicParamSets; 248 uint8_t mProfileIdc; 249 uint8_t mProfileCompatible; 250 uint8_t mLevelIdc; 251 252 void *mCodecSpecificData; 253 size_t mCodecSpecificDataSize; 254 bool mGotAllCodecSpecificData; 255 bool mTrackingProgressStatus; 256 257 bool mReachedEOS; 258 int64_t mStartTimestampUs; 259 int64_t mStartTimeRealUs; 260 int64_t mFirstSampleTimeRealUs; 261 int64_t mPreviousTrackTimeUs; 262 int64_t mTrackEveryTimeDurationUs; 263 264 // Update the audio track's drift information. 265 void updateDriftTime(const sp<MetaData>& meta); 266 267 int32_t getStartTimeOffsetScaledTime() const; 268 269 static void *ThreadWrapper(void *me); 270 status_t threadEntry(); 271 272 const uint8_t *parseParamSet( 273 const uint8_t *data, size_t length, int type, size_t *paramSetLen); 274 275 status_t makeAVCCodecSpecificData(const uint8_t *data, size_t size); 276 status_t copyAVCCodecSpecificData(const uint8_t *data, size_t size); 277 status_t parseAVCCodecSpecificData(const uint8_t *data, size_t size); 278 279 // Track authoring progress status 280 void trackProgressStatus(int64_t timeUs, status_t err = OK); 281 void initTrackingProgressStatus(MetaData *params); 282 283 void getCodecSpecificDataFromInputFormatIfPossible(); 284 285 // Determine the track time scale 286 // If it is an audio track, try to use the sampling rate as 287 // the time scale; however, if user chooses the overwrite 288 // value, the user-supplied time scale will be used. 289 void setTimeScale(); 290 291 // Simple validation on the codec specific data 292 status_t checkCodecSpecificData() const; 293 int32_t mRotation; 294 295 void updateTrackSizeEstimate(); 296 void addOneStscTableEntry(size_t chunkId, size_t sampleId); 297 void addOneStssTableEntry(size_t sampleId); 298 299 // Duration is time scale based 300 void addOneSttsTableEntry(size_t sampleCount, int32_t timescaledDur); 301 void addOneCttsTableEntry(size_t sampleCount, int32_t timescaledDur); 302 303 bool isTrackMalFormed() const; 304 void sendTrackSummary(bool hasMultipleTracks); 305 306 // Write the boxes 307 void writeStcoBox(bool use32BitOffset); 308 void writeStscBox(); 309 void writeStszBox(); 310 void writeStssBox(); 311 void writeSttsBox(); 312 void writeCttsBox(); 313 void writeD263Box(); 314 void writePaspBox(); 315 void writeAvccBox(); 316 void writeUrlBox(); 317 void writeDrefBox(); 318 void writeDinfBox(); 319 void writeDamrBox(); 320 void writeMdhdBox(uint32_t now); 321 void writeSmhdBox(); 322 void writeVmhdBox(); 323 void writeHdlrBox(); 324 void writeTkhdBox(uint32_t now); 325 void writeMp4aEsdsBox(); 326 void writeMp4vEsdsBox(); 327 void writeAudioFourCCBox(); 328 void writeVideoFourCCBox(); 329 void writeStblBox(bool use32BitOffset); 330 331 Track(const Track &); 332 Track &operator=(const Track &); 333}; 334 335MPEG4Writer::MPEG4Writer(const char *filename) 336 : mFd(-1), 337 mInitCheck(NO_INIT), 338 mUse4ByteNalLength(true), 339 mUse32BitOffset(true), 340 mIsFileSizeLimitExplicitlyRequested(false), 341 mPaused(false), 342 mStarted(false), 343 mWriterThreadStarted(false), 344 mOffset(0), 345 mMdatOffset(0), 346 mEstimatedMoovBoxSize(0), 347 mInterleaveDurationUs(1000000), 348 mLatitudex10000(0), 349 mLongitudex10000(0), 350 mAreGeoTagsAvailable(false), 351 mStartTimeOffsetMs(-1) { 352 353 mFd = open(filename, O_CREAT | O_LARGEFILE | O_TRUNC | O_RDWR, S_IRUSR | S_IWUSR); 354 if (mFd >= 0) { 355 mInitCheck = OK; 356 } 357} 358 359MPEG4Writer::MPEG4Writer(int fd) 360 : mFd(dup(fd)), 361 mInitCheck(mFd < 0? NO_INIT: OK), 362 mUse4ByteNalLength(true), 363 mUse32BitOffset(true), 364 mIsFileSizeLimitExplicitlyRequested(false), 365 mPaused(false), 366 mStarted(false), 367 mWriterThreadStarted(false), 368 mOffset(0), 369 mMdatOffset(0), 370 mEstimatedMoovBoxSize(0), 371 mInterleaveDurationUs(1000000), 372 mLatitudex10000(0), 373 mLongitudex10000(0), 374 mAreGeoTagsAvailable(false), 375 mStartTimeOffsetMs(-1) { 376} 377 378MPEG4Writer::~MPEG4Writer() { 379 reset(); 380 381 while (!mTracks.empty()) { 382 List<Track *>::iterator it = mTracks.begin(); 383 delete *it; 384 (*it) = NULL; 385 mTracks.erase(it); 386 } 387 mTracks.clear(); 388} 389 390status_t MPEG4Writer::dump( 391 int fd, const Vector<String16>& args) { 392 const size_t SIZE = 256; 393 char buffer[SIZE]; 394 String8 result; 395 snprintf(buffer, SIZE, " MPEG4Writer %p\n", this); 396 result.append(buffer); 397 snprintf(buffer, SIZE, " mStarted: %s\n", mStarted? "true": "false"); 398 result.append(buffer); 399 ::write(fd, result.string(), result.size()); 400 for (List<Track *>::iterator it = mTracks.begin(); 401 it != mTracks.end(); ++it) { 402 (*it)->dump(fd, args); 403 } 404 return OK; 405} 406 407status_t MPEG4Writer::Track::dump( 408 int fd, const Vector<String16>& args) const { 409 const size_t SIZE = 256; 410 char buffer[SIZE]; 411 String8 result; 412 snprintf(buffer, SIZE, " %s track\n", mIsAudio? "Audio": "Video"); 413 result.append(buffer); 414 snprintf(buffer, SIZE, " reached EOS: %s\n", 415 mReachedEOS? "true": "false"); 416 result.append(buffer); 417 snprintf(buffer, SIZE, " frames encoded : %d\n", mStszTableEntries->count()); 418 result.append(buffer); 419 snprintf(buffer, SIZE, " duration encoded : %lld us\n", mTrackDurationUs); 420 result.append(buffer); 421 ::write(fd, result.string(), result.size()); 422 return OK; 423} 424 425status_t MPEG4Writer::addSource(const sp<MediaSource> &source) { 426 Mutex::Autolock l(mLock); 427 if (mStarted) { 428 ALOGE("Attempt to add source AFTER recording is started"); 429 return UNKNOWN_ERROR; 430 } 431 Track *track = new Track(this, source, 1 + mTracks.size()); 432 mTracks.push_back(track); 433 434 return OK; 435} 436 437status_t MPEG4Writer::startTracks(MetaData *params) { 438 for (List<Track *>::iterator it = mTracks.begin(); 439 it != mTracks.end(); ++it) { 440 status_t err = (*it)->start(params); 441 442 if (err != OK) { 443 for (List<Track *>::iterator it2 = mTracks.begin(); 444 it2 != it; ++it2) { 445 (*it2)->stop(); 446 } 447 448 return err; 449 } 450 } 451 return OK; 452} 453 454int64_t MPEG4Writer::estimateMoovBoxSize(int32_t bitRate) { 455 // This implementation is highly experimental/heurisitic. 456 // 457 // Statistical analysis shows that metadata usually accounts 458 // for a small portion of the total file size, usually < 0.6%. 459 460 // The default MIN_MOOV_BOX_SIZE is set to 0.6% x 1MB / 2, 461 // where 1MB is the common file size limit for MMS application. 462 // The default MAX _MOOV_BOX_SIZE value is based on about 3 463 // minute video recording with a bit rate about 3 Mbps, because 464 // statistics also show that most of the video captured are going 465 // to be less than 3 minutes. 466 467 // If the estimation is wrong, we will pay the price of wasting 468 // some reserved space. This should not happen so often statistically. 469 static const int32_t factor = mUse32BitOffset? 1: 2; 470 static const int64_t MIN_MOOV_BOX_SIZE = 3 * 1024; // 3 KB 471 static const int64_t MAX_MOOV_BOX_SIZE = (180 * 3000000 * 6LL / 8000); 472 int64_t size = MIN_MOOV_BOX_SIZE; 473 474 // Max file size limit is set 475 if (mMaxFileSizeLimitBytes != 0 && mIsFileSizeLimitExplicitlyRequested) { 476 size = mMaxFileSizeLimitBytes * 6 / 1000; 477 } 478 479 // Max file duration limit is set 480 if (mMaxFileDurationLimitUs != 0) { 481 if (bitRate > 0) { 482 int64_t size2 = 483 ((mMaxFileDurationLimitUs * bitRate * 6) / 1000 / 8000000); 484 if (mMaxFileSizeLimitBytes != 0 && mIsFileSizeLimitExplicitlyRequested) { 485 // When both file size and duration limits are set, 486 // we use the smaller limit of the two. 487 if (size > size2) { 488 size = size2; 489 } 490 } else { 491 // Only max file duration limit is set 492 size = size2; 493 } 494 } 495 } 496 497 if (size < MIN_MOOV_BOX_SIZE) { 498 size = MIN_MOOV_BOX_SIZE; 499 } 500 501 // Any long duration recording will be probably end up with 502 // non-streamable mp4 file. 503 if (size > MAX_MOOV_BOX_SIZE) { 504 size = MAX_MOOV_BOX_SIZE; 505 } 506 507 ALOGI("limits: %lld/%lld bytes/us, bit rate: %d bps and the estimated" 508 " moov size %lld bytes", 509 mMaxFileSizeLimitBytes, mMaxFileDurationLimitUs, bitRate, size); 510 return factor * size; 511} 512 513status_t MPEG4Writer::start(MetaData *param) { 514 if (mInitCheck != OK) { 515 return UNKNOWN_ERROR; 516 } 517 518 /* 519 * Check mMaxFileSizeLimitBytes at the beginning 520 * since mMaxFileSizeLimitBytes may be implicitly 521 * changed later for 32-bit file offset even if 522 * user does not ask to set it explicitly. 523 */ 524 if (mMaxFileSizeLimitBytes != 0) { 525 mIsFileSizeLimitExplicitlyRequested = true; 526 } 527 528 int32_t use64BitOffset; 529 if (param && 530 param->findInt32(kKey64BitFileOffset, &use64BitOffset) && 531 use64BitOffset) { 532 mUse32BitOffset = false; 533 } 534 535 if (mUse32BitOffset) { 536 // Implicit 32 bit file size limit 537 if (mMaxFileSizeLimitBytes == 0) { 538 mMaxFileSizeLimitBytes = kMax32BitFileSize; 539 } 540 541 // If file size is set to be larger than the 32 bit file 542 // size limit, treat it as an error. 543 if (mMaxFileSizeLimitBytes > kMax32BitFileSize) { 544 ALOGW("32-bit file size limit (%lld bytes) too big. " 545 "It is changed to %lld bytes", 546 mMaxFileSizeLimitBytes, kMax32BitFileSize); 547 mMaxFileSizeLimitBytes = kMax32BitFileSize; 548 } 549 } 550 551 int32_t use2ByteNalLength; 552 if (param && 553 param->findInt32(kKey2ByteNalLength, &use2ByteNalLength) && 554 use2ByteNalLength) { 555 mUse4ByteNalLength = false; 556 } 557 558 mStartTimestampUs = -1; 559 560 if (mStarted) { 561 if (mPaused) { 562 mPaused = false; 563 return startTracks(param); 564 } 565 return OK; 566 } 567 568 if (!param || 569 !param->findInt32(kKeyTimeScale, &mTimeScale)) { 570 mTimeScale = 1000; 571 } 572 CHECK_GT(mTimeScale, 0); 573 ALOGV("movie time scale: %d", mTimeScale); 574 575 /* 576 * When the requested file size limit is small, the priority 577 * is to meet the file size limit requirement, rather than 578 * to make the file streamable. mStreamableFile does not tell 579 * whether the actual recorded file is streamable or not. 580 */ 581 mStreamableFile = 582 (mMaxFileSizeLimitBytes != 0 && 583 mMaxFileSizeLimitBytes >= kMinStreamableFileSizeInBytes); 584 585 /* 586 * mWriteMoovBoxToMemory is true if the amount of data in moov box is 587 * smaller than the reserved free space at the beginning of a file, AND 588 * when the content of moov box is constructed. Note that video/audio 589 * frame data is always written to the file but not in the memory. 590 * 591 * Before stop()/reset() is called, mWriteMoovBoxToMemory is always 592 * false. When reset() is called at the end of a recording session, 593 * Moov box needs to be constructed. 594 * 595 * 1) Right before a moov box is constructed, mWriteMoovBoxToMemory 596 * to set to mStreamableFile so that if 597 * the file is intended to be streamable, it is set to true; 598 * otherwise, it is set to false. When the value is set to false, 599 * all the content of the moov box is written immediately to 600 * the end of the file. When the value is set to true, all the 601 * content of the moov box is written to an in-memory cache, 602 * mMoovBoxBuffer, util the following condition happens. Note 603 * that the size of the in-memory cache is the same as the 604 * reserved free space at the beginning of the file. 605 * 606 * 2) While the data of the moov box is written to an in-memory 607 * cache, the data size is checked against the reserved space. 608 * If the data size surpasses the reserved space, subsequent moov 609 * data could no longer be hold in the in-memory cache. This also 610 * indicates that the reserved space was too small. At this point, 611 * _all_ moov data must be written to the end of the file. 612 * mWriteMoovBoxToMemory must be set to false to direct the write 613 * to the file. 614 * 615 * 3) If the data size in moov box is smaller than the reserved 616 * space after moov box is completely constructed, the in-memory 617 * cache copy of the moov box is written to the reserved free 618 * space. Thus, immediately after the moov is completedly 619 * constructed, mWriteMoovBoxToMemory is always set to false. 620 */ 621 mWriteMoovBoxToMemory = false; 622 mMoovBoxBuffer = NULL; 623 mMoovBoxBufferOffset = 0; 624 625 writeFtypBox(param); 626 627 mFreeBoxOffset = mOffset; 628 629 if (mEstimatedMoovBoxSize == 0) { 630 int32_t bitRate = -1; 631 if (param) { 632 param->findInt32(kKeyBitRate, &bitRate); 633 } 634 mEstimatedMoovBoxSize = estimateMoovBoxSize(bitRate); 635 } 636 CHECK_GE(mEstimatedMoovBoxSize, 8); 637 if (mStreamableFile) { 638 // Reserve a 'free' box only for streamable file 639 lseek64(mFd, mFreeBoxOffset, SEEK_SET); 640 writeInt32(mEstimatedMoovBoxSize); 641 write("free", 4); 642 mMdatOffset = mFreeBoxOffset + mEstimatedMoovBoxSize; 643 } else { 644 mMdatOffset = mOffset; 645 } 646 647 mOffset = mMdatOffset; 648 lseek64(mFd, mMdatOffset, SEEK_SET); 649 if (mUse32BitOffset) { 650 write("????mdat", 8); 651 } else { 652 write("\x00\x00\x00\x01mdat????????", 16); 653 } 654 655 status_t err = startWriterThread(); 656 if (err != OK) { 657 return err; 658 } 659 660 err = startTracks(param); 661 if (err != OK) { 662 return err; 663 } 664 665 mStarted = true; 666 return OK; 667} 668 669bool MPEG4Writer::use32BitFileOffset() const { 670 return mUse32BitOffset; 671} 672 673status_t MPEG4Writer::pause() { 674 if (mInitCheck != OK) { 675 return OK; 676 } 677 mPaused = true; 678 status_t err = OK; 679 for (List<Track *>::iterator it = mTracks.begin(); 680 it != mTracks.end(); ++it) { 681 status_t status = (*it)->pause(); 682 if (status != OK) { 683 err = status; 684 } 685 } 686 return err; 687} 688 689void MPEG4Writer::stopWriterThread() { 690 ALOGD("Stopping writer thread"); 691 if (!mWriterThreadStarted) { 692 return; 693 } 694 695 { 696 Mutex::Autolock autolock(mLock); 697 698 mDone = true; 699 mChunkReadyCondition.signal(); 700 } 701 702 void *dummy; 703 pthread_join(mThread, &dummy); 704 mWriterThreadStarted = false; 705 ALOGD("Writer thread stopped"); 706} 707 708/* 709 * MP4 file standard defines a composition matrix: 710 * | a b u | 711 * | c d v | 712 * | x y w | 713 * 714 * the element in the matrix is stored in the following 715 * order: {a, b, u, c, d, v, x, y, w}, 716 * where a, b, c, d, x, and y is in 16.16 format, while 717 * u, v and w is in 2.30 format. 718 */ 719void MPEG4Writer::writeCompositionMatrix(int degrees) { 720 ALOGV("writeCompositionMatrix"); 721 uint32_t a = 0x00010000; 722 uint32_t b = 0; 723 uint32_t c = 0; 724 uint32_t d = 0x00010000; 725 switch (degrees) { 726 case 0: 727 break; 728 case 90: 729 a = 0; 730 b = 0x00010000; 731 c = 0xFFFF0000; 732 d = 0; 733 break; 734 case 180: 735 a = 0xFFFF0000; 736 d = 0xFFFF0000; 737 break; 738 case 270: 739 a = 0; 740 b = 0xFFFF0000; 741 c = 0x00010000; 742 d = 0; 743 break; 744 default: 745 CHECK(!"Should never reach this unknown rotation"); 746 break; 747 } 748 749 writeInt32(a); // a 750 writeInt32(b); // b 751 writeInt32(0); // u 752 writeInt32(c); // c 753 writeInt32(d); // d 754 writeInt32(0); // v 755 writeInt32(0); // x 756 writeInt32(0); // y 757 writeInt32(0x40000000); // w 758} 759 760void MPEG4Writer::release() { 761 close(mFd); 762 mFd = -1; 763 mInitCheck = NO_INIT; 764 mStarted = false; 765} 766 767status_t MPEG4Writer::reset() { 768 if (mInitCheck != OK) { 769 return OK; 770 } else { 771 if (!mWriterThreadStarted || 772 !mStarted) { 773 if (mWriterThreadStarted) { 774 stopWriterThread(); 775 } 776 release(); 777 return OK; 778 } 779 } 780 781 status_t err = OK; 782 int64_t maxDurationUs = 0; 783 int64_t minDurationUs = 0x7fffffffffffffffLL; 784 for (List<Track *>::iterator it = mTracks.begin(); 785 it != mTracks.end(); ++it) { 786 status_t status = (*it)->stop(); 787 if (err == OK && status != OK) { 788 err = status; 789 } 790 791 int64_t durationUs = (*it)->getDurationUs(); 792 if (durationUs > maxDurationUs) { 793 maxDurationUs = durationUs; 794 } 795 if (durationUs < minDurationUs) { 796 minDurationUs = durationUs; 797 } 798 } 799 800 if (mTracks.size() > 1) { 801 ALOGD("Duration from tracks range is [%lld, %lld] us", 802 minDurationUs, maxDurationUs); 803 } 804 805 stopWriterThread(); 806 807 // Do not write out movie header on error. 808 if (err != OK) { 809 release(); 810 return err; 811 } 812 813 // Fix up the size of the 'mdat' chunk. 814 if (mUse32BitOffset) { 815 lseek64(mFd, mMdatOffset, SEEK_SET); 816 int32_t size = htonl(static_cast<int32_t>(mOffset - mMdatOffset)); 817 ::write(mFd, &size, 4); 818 } else { 819 lseek64(mFd, mMdatOffset + 8, SEEK_SET); 820 int64_t size = mOffset - mMdatOffset; 821 size = hton64(size); 822 ::write(mFd, &size, 8); 823 } 824 lseek64(mFd, mOffset, SEEK_SET); 825 826 // Construct moov box now 827 mMoovBoxBufferOffset = 0; 828 mWriteMoovBoxToMemory = mStreamableFile; 829 if (mWriteMoovBoxToMemory) { 830 // There is no need to allocate in-memory cache 831 // for moov box if the file is not streamable. 832 833 mMoovBoxBuffer = (uint8_t *) malloc(mEstimatedMoovBoxSize); 834 CHECK(mMoovBoxBuffer != NULL); 835 } 836 writeMoovBox(maxDurationUs); 837 838 // mWriteMoovBoxToMemory could be set to false in 839 // MPEG4Writer::write() method 840 if (mWriteMoovBoxToMemory) { 841 mWriteMoovBoxToMemory = false; 842 // Content of the moov box is saved in the cache, and the in-memory 843 // moov box needs to be written to the file in a single shot. 844 845 CHECK_LE(mMoovBoxBufferOffset + 8, mEstimatedMoovBoxSize); 846 847 // Moov box 848 lseek64(mFd, mFreeBoxOffset, SEEK_SET); 849 mOffset = mFreeBoxOffset; 850 write(mMoovBoxBuffer, 1, mMoovBoxBufferOffset); 851 852 // Free box 853 lseek64(mFd, mOffset, SEEK_SET); 854 writeInt32(mEstimatedMoovBoxSize - mMoovBoxBufferOffset); 855 write("free", 4); 856 } else { 857 ALOGI("The mp4 file will not be streamable."); 858 } 859 860 // Free in-memory cache for moov box 861 if (mMoovBoxBuffer != NULL) { 862 free(mMoovBoxBuffer); 863 mMoovBoxBuffer = NULL; 864 mMoovBoxBufferOffset = 0; 865 } 866 867 CHECK(mBoxes.empty()); 868 869 release(); 870 return err; 871} 872 873uint32_t MPEG4Writer::getMpeg4Time() { 874 time_t now = time(NULL); 875 // MP4 file uses time counting seconds since midnight, Jan. 1, 1904 876 // while time function returns Unix epoch values which starts 877 // at 1970-01-01. Lets add the number of seconds between them 878 uint32_t mpeg4Time = now + (66 * 365 + 17) * (24 * 60 * 60); 879 return mpeg4Time; 880} 881 882void MPEG4Writer::writeMvhdBox(int64_t durationUs) { 883 uint32_t now = getMpeg4Time(); 884 beginBox("mvhd"); 885 writeInt32(0); // version=0, flags=0 886 writeInt32(now); // creation time 887 writeInt32(now); // modification time 888 writeInt32(mTimeScale); // mvhd timescale 889 int32_t duration = (durationUs * mTimeScale + 5E5) / 1E6; 890 writeInt32(duration); 891 writeInt32(0x10000); // rate: 1.0 892 writeInt16(0x100); // volume 893 writeInt16(0); // reserved 894 writeInt32(0); // reserved 895 writeInt32(0); // reserved 896 writeCompositionMatrix(0); // matrix 897 writeInt32(0); // predefined 898 writeInt32(0); // predefined 899 writeInt32(0); // predefined 900 writeInt32(0); // predefined 901 writeInt32(0); // predefined 902 writeInt32(0); // predefined 903 writeInt32(mTracks.size() + 1); // nextTrackID 904 endBox(); // mvhd 905} 906 907void MPEG4Writer::writeMoovBox(int64_t durationUs) { 908 beginBox("moov"); 909 writeMvhdBox(durationUs); 910 if (mAreGeoTagsAvailable) { 911 writeUdtaBox(); 912 } 913 int32_t id = 1; 914 for (List<Track *>::iterator it = mTracks.begin(); 915 it != mTracks.end(); ++it, ++id) { 916 (*it)->writeTrackHeader(mUse32BitOffset); 917 } 918 endBox(); // moov 919} 920 921void MPEG4Writer::writeFtypBox(MetaData *param) { 922 beginBox("ftyp"); 923 924 int32_t fileType; 925 if (param && param->findInt32(kKeyFileType, &fileType) && 926 fileType != OUTPUT_FORMAT_MPEG_4) { 927 writeFourcc("3gp4"); 928 } else { 929 writeFourcc("isom"); 930 } 931 932 writeInt32(0); 933 writeFourcc("isom"); 934 writeFourcc("3gp4"); 935 endBox(); 936} 937 938static bool isTestModeEnabled() { 939#if (PROPERTY_VALUE_MAX < 5) 940#error "PROPERTY_VALUE_MAX must be at least 5" 941#endif 942 943 // Test mode is enabled only if rw.media.record.test system 944 // property is enabled. 945 char value[PROPERTY_VALUE_MAX]; 946 if (property_get("rw.media.record.test", value, NULL) && 947 (!strcasecmp(value, "true") || !strcasecmp(value, "1"))) { 948 return true; 949 } 950 return false; 951} 952 953void MPEG4Writer::sendSessionSummary() { 954 // Send session summary only if test mode is enabled 955 if (!isTestModeEnabled()) { 956 return; 957 } 958 959 for (List<ChunkInfo>::iterator it = mChunkInfos.begin(); 960 it != mChunkInfos.end(); ++it) { 961 int trackNum = it->mTrack->getTrackId() << 28; 962 notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 963 trackNum | MEDIA_RECORDER_TRACK_INTER_CHUNK_TIME_MS, 964 it->mMaxInterChunkDurUs); 965 } 966} 967 968status_t MPEG4Writer::setInterleaveDuration(uint32_t durationUs) { 969 mInterleaveDurationUs = durationUs; 970 return OK; 971} 972 973void MPEG4Writer::lock() { 974 mLock.lock(); 975} 976 977void MPEG4Writer::unlock() { 978 mLock.unlock(); 979} 980 981off64_t MPEG4Writer::addSample_l(MediaBuffer *buffer) { 982 off64_t old_offset = mOffset; 983 984 ::write(mFd, 985 (const uint8_t *)buffer->data() + buffer->range_offset(), 986 buffer->range_length()); 987 988 mOffset += buffer->range_length(); 989 990 return old_offset; 991} 992 993static void StripStartcode(MediaBuffer *buffer) { 994 if (buffer->range_length() < 4) { 995 return; 996 } 997 998 const uint8_t *ptr = 999 (const uint8_t *)buffer->data() + buffer->range_offset(); 1000 1001 if (!memcmp(ptr, "\x00\x00\x00\x01", 4)) { 1002 buffer->set_range( 1003 buffer->range_offset() + 4, buffer->range_length() - 4); 1004 } 1005} 1006 1007off64_t MPEG4Writer::addLengthPrefixedSample_l(MediaBuffer *buffer) { 1008 off64_t old_offset = mOffset; 1009 1010 size_t length = buffer->range_length(); 1011 1012 if (mUse4ByteNalLength) { 1013 uint8_t x = length >> 24; 1014 ::write(mFd, &x, 1); 1015 x = (length >> 16) & 0xff; 1016 ::write(mFd, &x, 1); 1017 x = (length >> 8) & 0xff; 1018 ::write(mFd, &x, 1); 1019 x = length & 0xff; 1020 ::write(mFd, &x, 1); 1021 1022 ::write(mFd, 1023 (const uint8_t *)buffer->data() + buffer->range_offset(), 1024 length); 1025 1026 mOffset += length + 4; 1027 } else { 1028 CHECK_LT(length, 65536); 1029 1030 uint8_t x = length >> 8; 1031 ::write(mFd, &x, 1); 1032 x = length & 0xff; 1033 ::write(mFd, &x, 1); 1034 ::write(mFd, (const uint8_t *)buffer->data() + buffer->range_offset(), length); 1035 mOffset += length + 2; 1036 } 1037 1038 return old_offset; 1039} 1040 1041size_t MPEG4Writer::write( 1042 const void *ptr, size_t size, size_t nmemb) { 1043 1044 const size_t bytes = size * nmemb; 1045 if (mWriteMoovBoxToMemory) { 1046 1047 off64_t moovBoxSize = 8 + mMoovBoxBufferOffset + bytes; 1048 if (moovBoxSize > mEstimatedMoovBoxSize) { 1049 // The reserved moov box at the beginning of the file 1050 // is not big enough. Moov box should be written to 1051 // the end of the file from now on, but not to the 1052 // in-memory cache. 1053 1054 // We write partial moov box that is in the memory to 1055 // the file first. 1056 for (List<off64_t>::iterator it = mBoxes.begin(); 1057 it != mBoxes.end(); ++it) { 1058 (*it) += mOffset; 1059 } 1060 lseek64(mFd, mOffset, SEEK_SET); 1061 ::write(mFd, mMoovBoxBuffer, mMoovBoxBufferOffset); 1062 ::write(mFd, ptr, bytes); 1063 mOffset += (bytes + mMoovBoxBufferOffset); 1064 1065 // All subsequent moov box content will be written 1066 // to the end of the file. 1067 mWriteMoovBoxToMemory = false; 1068 } else { 1069 memcpy(mMoovBoxBuffer + mMoovBoxBufferOffset, ptr, bytes); 1070 mMoovBoxBufferOffset += bytes; 1071 } 1072 } else { 1073 ::write(mFd, ptr, size * nmemb); 1074 mOffset += bytes; 1075 } 1076 return bytes; 1077} 1078 1079void MPEG4Writer::beginBox(const char *fourcc) { 1080 CHECK_EQ(strlen(fourcc), 4); 1081 1082 mBoxes.push_back(mWriteMoovBoxToMemory? 1083 mMoovBoxBufferOffset: mOffset); 1084 1085 writeInt32(0); 1086 writeFourcc(fourcc); 1087} 1088 1089void MPEG4Writer::endBox() { 1090 CHECK(!mBoxes.empty()); 1091 1092 off64_t offset = *--mBoxes.end(); 1093 mBoxes.erase(--mBoxes.end()); 1094 1095 if (mWriteMoovBoxToMemory) { 1096 int32_t x = htonl(mMoovBoxBufferOffset - offset); 1097 memcpy(mMoovBoxBuffer + offset, &x, 4); 1098 } else { 1099 lseek64(mFd, offset, SEEK_SET); 1100 writeInt32(mOffset - offset); 1101 mOffset -= 4; 1102 lseek64(mFd, mOffset, SEEK_SET); 1103 } 1104} 1105 1106void MPEG4Writer::writeInt8(int8_t x) { 1107 write(&x, 1, 1); 1108} 1109 1110void MPEG4Writer::writeInt16(int16_t x) { 1111 x = htons(x); 1112 write(&x, 1, 2); 1113} 1114 1115void MPEG4Writer::writeInt32(int32_t x) { 1116 x = htonl(x); 1117 write(&x, 1, 4); 1118} 1119 1120void MPEG4Writer::writeInt64(int64_t x) { 1121 x = hton64(x); 1122 write(&x, 1, 8); 1123} 1124 1125void MPEG4Writer::writeCString(const char *s) { 1126 size_t n = strlen(s); 1127 write(s, 1, n + 1); 1128} 1129 1130void MPEG4Writer::writeFourcc(const char *s) { 1131 CHECK_EQ(strlen(s), 4); 1132 write(s, 1, 4); 1133} 1134 1135 1136// Written in +/-DD.DDDD format 1137void MPEG4Writer::writeLatitude(int degreex10000) { 1138 bool isNegative = (degreex10000 < 0); 1139 char sign = isNegative? '-': '+'; 1140 1141 // Handle the whole part 1142 char str[9]; 1143 int wholePart = degreex10000 / 10000; 1144 if (wholePart == 0) { 1145 snprintf(str, 5, "%c%.2d.", sign, wholePart); 1146 } else { 1147 snprintf(str, 5, "%+.2d.", wholePart); 1148 } 1149 1150 // Handle the fractional part 1151 int fractionalPart = degreex10000 - (wholePart * 10000); 1152 if (fractionalPart < 0) { 1153 fractionalPart = -fractionalPart; 1154 } 1155 snprintf(&str[4], 5, "%.4d", fractionalPart); 1156 1157 // Do not write the null terminator 1158 write(str, 1, 8); 1159} 1160 1161// Written in +/- DDD.DDDD format 1162void MPEG4Writer::writeLongitude(int degreex10000) { 1163 bool isNegative = (degreex10000 < 0); 1164 char sign = isNegative? '-': '+'; 1165 1166 // Handle the whole part 1167 char str[10]; 1168 int wholePart = degreex10000 / 10000; 1169 if (wholePart == 0) { 1170 snprintf(str, 6, "%c%.3d.", sign, wholePart); 1171 } else { 1172 snprintf(str, 6, "%+.3d.", wholePart); 1173 } 1174 1175 // Handle the fractional part 1176 int fractionalPart = degreex10000 - (wholePart * 10000); 1177 if (fractionalPart < 0) { 1178 fractionalPart = -fractionalPart; 1179 } 1180 snprintf(&str[5], 5, "%.4d", fractionalPart); 1181 1182 // Do not write the null terminator 1183 write(str, 1, 9); 1184} 1185 1186/* 1187 * Geodata is stored according to ISO-6709 standard. 1188 * latitudex10000 is latitude in degrees times 10000, and 1189 * longitudex10000 is longitude in degrees times 10000. 1190 * The range for the latitude is in [-90, +90], and 1191 * The range for the longitude is in [-180, +180] 1192 */ 1193status_t MPEG4Writer::setGeoData(int latitudex10000, int longitudex10000) { 1194 // Is latitude or longitude out of range? 1195 if (latitudex10000 < -900000 || latitudex10000 > 900000 || 1196 longitudex10000 < -1800000 || longitudex10000 > 1800000) { 1197 return BAD_VALUE; 1198 } 1199 1200 mLatitudex10000 = latitudex10000; 1201 mLongitudex10000 = longitudex10000; 1202 mAreGeoTagsAvailable = true; 1203 return OK; 1204} 1205 1206void MPEG4Writer::write(const void *data, size_t size) { 1207 write(data, 1, size); 1208} 1209 1210bool MPEG4Writer::isFileStreamable() const { 1211 return mStreamableFile; 1212} 1213 1214bool MPEG4Writer::exceedsFileSizeLimit() { 1215 // No limit 1216 if (mMaxFileSizeLimitBytes == 0) { 1217 return false; 1218 } 1219 1220 int64_t nTotalBytesEstimate = static_cast<int64_t>(mEstimatedMoovBoxSize); 1221 for (List<Track *>::iterator it = mTracks.begin(); 1222 it != mTracks.end(); ++it) { 1223 nTotalBytesEstimate += (*it)->getEstimatedTrackSizeBytes(); 1224 } 1225 1226 if (!mStreamableFile) { 1227 // Add 1024 bytes as error tolerance 1228 return nTotalBytesEstimate + 1024 >= mMaxFileSizeLimitBytes; 1229 } 1230 // Be conservative in the estimate: do not exceed 95% of 1231 // the target file limit. For small target file size limit, though, 1232 // this will not help. 1233 return (nTotalBytesEstimate >= (95 * mMaxFileSizeLimitBytes) / 100); 1234} 1235 1236bool MPEG4Writer::exceedsFileDurationLimit() { 1237 // No limit 1238 if (mMaxFileDurationLimitUs == 0) { 1239 return false; 1240 } 1241 1242 for (List<Track *>::iterator it = mTracks.begin(); 1243 it != mTracks.end(); ++it) { 1244 if ((*it)->getDurationUs() >= mMaxFileDurationLimitUs) { 1245 return true; 1246 } 1247 } 1248 return false; 1249} 1250 1251bool MPEG4Writer::reachedEOS() { 1252 bool allDone = true; 1253 for (List<Track *>::iterator it = mTracks.begin(); 1254 it != mTracks.end(); ++it) { 1255 if (!(*it)->reachedEOS()) { 1256 allDone = false; 1257 break; 1258 } 1259 } 1260 1261 return allDone; 1262} 1263 1264void MPEG4Writer::setStartTimestampUs(int64_t timeUs) { 1265 ALOGI("setStartTimestampUs: %lld", timeUs); 1266 CHECK_GE(timeUs, 0ll); 1267 Mutex::Autolock autoLock(mLock); 1268 if (mStartTimestampUs < 0 || mStartTimestampUs > timeUs) { 1269 mStartTimestampUs = timeUs; 1270 ALOGI("Earliest track starting time: %lld", mStartTimestampUs); 1271 } 1272} 1273 1274int64_t MPEG4Writer::getStartTimestampUs() { 1275 Mutex::Autolock autoLock(mLock); 1276 return mStartTimestampUs; 1277} 1278 1279size_t MPEG4Writer::numTracks() { 1280 Mutex::Autolock autolock(mLock); 1281 return mTracks.size(); 1282} 1283 1284//////////////////////////////////////////////////////////////////////////////// 1285 1286MPEG4Writer::Track::Track( 1287 MPEG4Writer *owner, const sp<MediaSource> &source, size_t trackId) 1288 : mOwner(owner), 1289 mMeta(source->getFormat()), 1290 mSource(source), 1291 mDone(false), 1292 mPaused(false), 1293 mResumed(false), 1294 mStarted(false), 1295 mTrackId(trackId), 1296 mTrackDurationUs(0), 1297 mEstimatedTrackSizeBytes(0), 1298 mSamplesHaveSameSize(true), 1299 mStszTableEntries(new ListTableEntries<uint32_t>(1000, 1)), 1300 mStcoTableEntries(new ListTableEntries<uint32_t>(1000, 1)), 1301 mCo64TableEntries(new ListTableEntries<off64_t>(1000, 1)), 1302 mStscTableEntries(new ListTableEntries<uint32_t>(1000, 3)), 1303 mStssTableEntries(new ListTableEntries<uint32_t>(1000, 1)), 1304 mSttsTableEntries(new ListTableEntries<uint32_t>(1000, 2)), 1305 mCttsTableEntries(new ListTableEntries<uint32_t>(1000, 2)), 1306 mCodecSpecificData(NULL), 1307 mCodecSpecificDataSize(0), 1308 mGotAllCodecSpecificData(false), 1309 mReachedEOS(false), 1310 mRotation(0) { 1311 getCodecSpecificDataFromInputFormatIfPossible(); 1312 1313 const char *mime; 1314 mMeta->findCString(kKeyMIMEType, &mime); 1315 mIsAvc = !strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_AVC); 1316 mIsAudio = !strncasecmp(mime, "audio/", 6); 1317 mIsMPEG4 = !strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_MPEG4) || 1318 !strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_AAC); 1319 1320 setTimeScale(); 1321} 1322 1323void MPEG4Writer::Track::updateTrackSizeEstimate() { 1324 1325 uint32_t stcoBoxCount = (mOwner->use32BitFileOffset() 1326 ? mStcoTableEntries->count() 1327 : mCo64TableEntries->count()); 1328 int64_t stcoBoxSizeBytes = stcoBoxCount * 4; 1329 int64_t stszBoxSizeBytes = mSamplesHaveSameSize? 4: (mStszTableEntries->count() * 4); 1330 1331 mEstimatedTrackSizeBytes = mMdatSizeBytes; // media data size 1332 if (!mOwner->isFileStreamable()) { 1333 // Reserved free space is not large enough to hold 1334 // all meta data and thus wasted. 1335 mEstimatedTrackSizeBytes += mStscTableEntries->count() * 12 + // stsc box size 1336 mStssTableEntries->count() * 4 + // stss box size 1337 mSttsTableEntries->count() * 8 + // stts box size 1338 mCttsTableEntries->count() * 8 + // ctts box size 1339 stcoBoxSizeBytes + // stco box size 1340 stszBoxSizeBytes; // stsz box size 1341 } 1342} 1343 1344void MPEG4Writer::Track::addOneStscTableEntry( 1345 size_t chunkId, size_t sampleId) { 1346 1347 mStscTableEntries->add(htonl(chunkId)); 1348 mStscTableEntries->add(htonl(sampleId)); 1349 mStscTableEntries->add(htonl(1)); 1350} 1351 1352void MPEG4Writer::Track::addOneStssTableEntry(size_t sampleId) { 1353 mStssTableEntries->add(htonl(sampleId)); 1354} 1355 1356void MPEG4Writer::Track::addOneSttsTableEntry( 1357 size_t sampleCount, int32_t duration) { 1358 1359 if (duration == 0) { 1360 ALOGW("0-duration samples found: %d", sampleCount); 1361 } 1362 mSttsTableEntries->add(htonl(sampleCount)); 1363 mSttsTableEntries->add(htonl(duration)); 1364} 1365 1366void MPEG4Writer::Track::addOneCttsTableEntry( 1367 size_t sampleCount, int32_t duration) { 1368 1369 if (mIsAudio) { 1370 return; 1371 } 1372 mCttsTableEntries->add(htonl(sampleCount)); 1373 mCttsTableEntries->add(htonl(duration)); 1374} 1375 1376void MPEG4Writer::Track::addChunkOffset(off64_t offset) { 1377 if (mOwner->use32BitFileOffset()) { 1378 uint32_t value = offset; 1379 mStcoTableEntries->add(htonl(value)); 1380 } else { 1381 mCo64TableEntries->add(hton64(offset)); 1382 } 1383} 1384 1385void MPEG4Writer::Track::setTimeScale() { 1386 ALOGV("setTimeScale"); 1387 // Default time scale 1388 mTimeScale = 90000; 1389 1390 if (mIsAudio) { 1391 // Use the sampling rate as the default time scale for audio track. 1392 int32_t sampleRate; 1393 bool success = mMeta->findInt32(kKeySampleRate, &sampleRate); 1394 CHECK(success); 1395 mTimeScale = sampleRate; 1396 } 1397 1398 // If someone would like to overwrite the timescale, use user-supplied value. 1399 int32_t timeScale; 1400 if (mMeta->findInt32(kKeyTimeScale, &timeScale)) { 1401 mTimeScale = timeScale; 1402 } 1403 1404 CHECK_GT(mTimeScale, 0); 1405} 1406 1407void MPEG4Writer::Track::getCodecSpecificDataFromInputFormatIfPossible() { 1408 const char *mime; 1409 CHECK(mMeta->findCString(kKeyMIMEType, &mime)); 1410 1411 if (!strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_AVC)) { 1412 uint32_t type; 1413 const void *data; 1414 size_t size; 1415 if (mMeta->findData(kKeyAVCC, &type, &data, &size)) { 1416 mCodecSpecificData = malloc(size); 1417 mCodecSpecificDataSize = size; 1418 memcpy(mCodecSpecificData, data, size); 1419 mGotAllCodecSpecificData = true; 1420 } 1421 } else if (!strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_MPEG4) 1422 || !strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_AAC)) { 1423 uint32_t type; 1424 const void *data; 1425 size_t size; 1426 if (mMeta->findData(kKeyESDS, &type, &data, &size)) { 1427 ESDS esds(data, size); 1428 if (esds.getCodecSpecificInfo(&data, &size) == OK) { 1429 mCodecSpecificData = malloc(size); 1430 mCodecSpecificDataSize = size; 1431 memcpy(mCodecSpecificData, data, size); 1432 mGotAllCodecSpecificData = true; 1433 } 1434 } 1435 } 1436} 1437 1438MPEG4Writer::Track::~Track() { 1439 stop(); 1440 1441 delete mStszTableEntries; 1442 delete mStcoTableEntries; 1443 delete mCo64TableEntries; 1444 delete mStscTableEntries; 1445 delete mSttsTableEntries; 1446 delete mStssTableEntries; 1447 delete mCttsTableEntries; 1448 1449 mStszTableEntries = NULL; 1450 mStcoTableEntries = NULL; 1451 mCo64TableEntries = NULL; 1452 mStscTableEntries = NULL; 1453 mSttsTableEntries = NULL; 1454 mStssTableEntries = NULL; 1455 mCttsTableEntries = NULL; 1456 1457 if (mCodecSpecificData != NULL) { 1458 free(mCodecSpecificData); 1459 mCodecSpecificData = NULL; 1460 } 1461} 1462 1463void MPEG4Writer::Track::initTrackingProgressStatus(MetaData *params) { 1464 ALOGV("initTrackingProgressStatus"); 1465 mPreviousTrackTimeUs = -1; 1466 mTrackingProgressStatus = false; 1467 mTrackEveryTimeDurationUs = 0; 1468 { 1469 int64_t timeUs; 1470 if (params && params->findInt64(kKeyTrackTimeStatus, &timeUs)) { 1471 ALOGV("Receive request to track progress status for every %lld us", timeUs); 1472 mTrackEveryTimeDurationUs = timeUs; 1473 mTrackingProgressStatus = true; 1474 } 1475 } 1476} 1477 1478// static 1479void *MPEG4Writer::ThreadWrapper(void *me) { 1480 ALOGV("ThreadWrapper: %p", me); 1481 MPEG4Writer *writer = static_cast<MPEG4Writer *>(me); 1482 writer->threadFunc(); 1483 return NULL; 1484} 1485 1486void MPEG4Writer::bufferChunk(const Chunk& chunk) { 1487 ALOGV("bufferChunk: %p", chunk.mTrack); 1488 Mutex::Autolock autolock(mLock); 1489 CHECK_EQ(mDone, false); 1490 1491 for (List<ChunkInfo>::iterator it = mChunkInfos.begin(); 1492 it != mChunkInfos.end(); ++it) { 1493 1494 if (chunk.mTrack == it->mTrack) { // Found owner 1495 it->mChunks.push_back(chunk); 1496 mChunkReadyCondition.signal(); 1497 return; 1498 } 1499 } 1500 1501 CHECK(!"Received a chunk for a unknown track"); 1502} 1503 1504void MPEG4Writer::writeChunkToFile(Chunk* chunk) { 1505 ALOGV("writeChunkToFile: %lld from %s track", 1506 chunk->mTimeStampUs, chunk->mTrack->isAudio()? "audio": "video"); 1507 1508 int32_t isFirstSample = true; 1509 while (!chunk->mSamples.empty()) { 1510 List<MediaBuffer *>::iterator it = chunk->mSamples.begin(); 1511 1512 off64_t offset = chunk->mTrack->isAvc() 1513 ? addLengthPrefixedSample_l(*it) 1514 : addSample_l(*it); 1515 1516 if (isFirstSample) { 1517 chunk->mTrack->addChunkOffset(offset); 1518 isFirstSample = false; 1519 } 1520 1521 (*it)->release(); 1522 (*it) = NULL; 1523 chunk->mSamples.erase(it); 1524 } 1525 chunk->mSamples.clear(); 1526} 1527 1528void MPEG4Writer::writeAllChunks() { 1529 ALOGV("writeAllChunks"); 1530 size_t outstandingChunks = 0; 1531 Chunk chunk; 1532 while (findChunkToWrite(&chunk)) { 1533 writeChunkToFile(&chunk); 1534 ++outstandingChunks; 1535 } 1536 1537 sendSessionSummary(); 1538 1539 mChunkInfos.clear(); 1540 ALOGD("%d chunks are written in the last batch", outstandingChunks); 1541} 1542 1543bool MPEG4Writer::findChunkToWrite(Chunk *chunk) { 1544 ALOGV("findChunkToWrite"); 1545 1546 int64_t minTimestampUs = 0x7FFFFFFFFFFFFFFFLL; 1547 Track *track = NULL; 1548 for (List<ChunkInfo>::iterator it = mChunkInfos.begin(); 1549 it != mChunkInfos.end(); ++it) { 1550 if (!it->mChunks.empty()) { 1551 List<Chunk>::iterator chunkIt = it->mChunks.begin(); 1552 if (chunkIt->mTimeStampUs < minTimestampUs) { 1553 minTimestampUs = chunkIt->mTimeStampUs; 1554 track = it->mTrack; 1555 } 1556 } 1557 } 1558 1559 if (track == NULL) { 1560 ALOGV("Nothing to be written after all"); 1561 return false; 1562 } 1563 1564 if (mIsFirstChunk) { 1565 mIsFirstChunk = false; 1566 } 1567 1568 for (List<ChunkInfo>::iterator it = mChunkInfos.begin(); 1569 it != mChunkInfos.end(); ++it) { 1570 if (it->mTrack == track) { 1571 *chunk = *(it->mChunks.begin()); 1572 it->mChunks.erase(it->mChunks.begin()); 1573 CHECK_EQ(chunk->mTrack, track); 1574 1575 int64_t interChunkTimeUs = 1576 chunk->mTimeStampUs - it->mPrevChunkTimestampUs; 1577 if (interChunkTimeUs > it->mPrevChunkTimestampUs) { 1578 it->mMaxInterChunkDurUs = interChunkTimeUs; 1579 } 1580 1581 return true; 1582 } 1583 } 1584 1585 return false; 1586} 1587 1588void MPEG4Writer::threadFunc() { 1589 ALOGV("threadFunc"); 1590 1591 prctl(PR_SET_NAME, (unsigned long)"MPEG4Writer", 0, 0, 0); 1592 1593 Mutex::Autolock autoLock(mLock); 1594 while (!mDone) { 1595 Chunk chunk; 1596 bool chunkFound = false; 1597 1598 while (!mDone && !(chunkFound = findChunkToWrite(&chunk))) { 1599 mChunkReadyCondition.wait(mLock); 1600 } 1601 1602 // Actual write without holding the lock in order to 1603 // reduce the blocking time for media track threads. 1604 if (chunkFound) { 1605 mLock.unlock(); 1606 writeChunkToFile(&chunk); 1607 mLock.lock(); 1608 } 1609 } 1610 1611 writeAllChunks(); 1612} 1613 1614status_t MPEG4Writer::startWriterThread() { 1615 ALOGV("startWriterThread"); 1616 1617 mDone = false; 1618 mIsFirstChunk = true; 1619 mDriftTimeUs = 0; 1620 for (List<Track *>::iterator it = mTracks.begin(); 1621 it != mTracks.end(); ++it) { 1622 ChunkInfo info; 1623 info.mTrack = *it; 1624 info.mPrevChunkTimestampUs = 0; 1625 info.mMaxInterChunkDurUs = 0; 1626 mChunkInfos.push_back(info); 1627 } 1628 1629 pthread_attr_t attr; 1630 pthread_attr_init(&attr); 1631 pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE); 1632 pthread_create(&mThread, &attr, ThreadWrapper, this); 1633 pthread_attr_destroy(&attr); 1634 mWriterThreadStarted = true; 1635 return OK; 1636} 1637 1638 1639status_t MPEG4Writer::Track::start(MetaData *params) { 1640 if (!mDone && mPaused) { 1641 mPaused = false; 1642 mResumed = true; 1643 return OK; 1644 } 1645 1646 int64_t startTimeUs; 1647 if (params == NULL || !params->findInt64(kKeyTime, &startTimeUs)) { 1648 startTimeUs = 0; 1649 } 1650 mStartTimeRealUs = startTimeUs; 1651 1652 int32_t rotationDegrees; 1653 if (!mIsAudio && params && params->findInt32(kKeyRotation, &rotationDegrees)) { 1654 mRotation = rotationDegrees; 1655 } 1656 1657 mIsRealTimeRecording = true; 1658 { 1659 int32_t isNotRealTime; 1660 if (params && params->findInt32(kKeyNotRealTime, &isNotRealTime)) { 1661 mIsRealTimeRecording = (isNotRealTime == 0); 1662 } 1663 } 1664 1665 initTrackingProgressStatus(params); 1666 1667 sp<MetaData> meta = new MetaData; 1668 if (mIsRealTimeRecording && mOwner->numTracks() > 1) { 1669 /* 1670 * This extra delay of accepting incoming audio/video signals 1671 * helps to align a/v start time at the beginning of a recording 1672 * session, and it also helps eliminate the "recording" sound for 1673 * camcorder applications. 1674 * 1675 * If client does not set the start time offset, we fall back to 1676 * use the default initial delay value. 1677 */ 1678 int64_t startTimeOffsetUs = mOwner->getStartTimeOffsetMs() * 1000LL; 1679 if (startTimeOffsetUs < 0) { // Start time offset was not set 1680 startTimeOffsetUs = kInitialDelayTimeUs; 1681 } 1682 startTimeUs += startTimeOffsetUs; 1683 ALOGI("Start time offset: %lld us", startTimeOffsetUs); 1684 } 1685 1686 meta->setInt64(kKeyTime, startTimeUs); 1687 1688 status_t err = mSource->start(meta.get()); 1689 if (err != OK) { 1690 mDone = mReachedEOS = true; 1691 return err; 1692 } 1693 1694 pthread_attr_t attr; 1695 pthread_attr_init(&attr); 1696 pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE); 1697 1698 mDone = false; 1699 mStarted = true; 1700 mTrackDurationUs = 0; 1701 mReachedEOS = false; 1702 mEstimatedTrackSizeBytes = 0; 1703 mMdatSizeBytes = 0; 1704 mMaxChunkDurationUs = 0; 1705 1706 pthread_create(&mThread, &attr, ThreadWrapper, this); 1707 pthread_attr_destroy(&attr); 1708 1709 return OK; 1710} 1711 1712status_t MPEG4Writer::Track::pause() { 1713 mPaused = true; 1714 return OK; 1715} 1716 1717status_t MPEG4Writer::Track::stop() { 1718 ALOGD("Stopping %s track", mIsAudio? "Audio": "Video"); 1719 if (!mStarted) { 1720 ALOGE("Stop() called but track is not started"); 1721 return ERROR_END_OF_STREAM; 1722 } 1723 1724 if (mDone) { 1725 return OK; 1726 } 1727 mDone = true; 1728 1729 void *dummy; 1730 pthread_join(mThread, &dummy); 1731 1732 status_t err = (status_t) dummy; 1733 1734 ALOGD("Stopping %s track source", mIsAudio? "Audio": "Video"); 1735 { 1736 status_t status = mSource->stop(); 1737 if (err == OK && status != OK && status != ERROR_END_OF_STREAM) { 1738 err = status; 1739 } 1740 } 1741 1742 ALOGD("%s track stopped", mIsAudio? "Audio": "Video"); 1743 return err; 1744} 1745 1746bool MPEG4Writer::Track::reachedEOS() { 1747 return mReachedEOS; 1748} 1749 1750// static 1751void *MPEG4Writer::Track::ThreadWrapper(void *me) { 1752 Track *track = static_cast<Track *>(me); 1753 1754 status_t err = track->threadEntry(); 1755 return (void *) err; 1756} 1757 1758static void getNalUnitType(uint8_t byte, uint8_t* type) { 1759 ALOGV("getNalUnitType: %d", byte); 1760 1761 // nal_unit_type: 5-bit unsigned integer 1762 *type = (byte & 0x1F); 1763} 1764 1765static const uint8_t *findNextStartCode( 1766 const uint8_t *data, size_t length) { 1767 1768 ALOGV("findNextStartCode: %p %d", data, length); 1769 1770 size_t bytesLeft = length; 1771 while (bytesLeft > 4 && 1772 memcmp("\x00\x00\x00\x01", &data[length - bytesLeft], 4)) { 1773 --bytesLeft; 1774 } 1775 if (bytesLeft <= 4) { 1776 bytesLeft = 0; // Last parameter set 1777 } 1778 return &data[length - bytesLeft]; 1779} 1780 1781const uint8_t *MPEG4Writer::Track::parseParamSet( 1782 const uint8_t *data, size_t length, int type, size_t *paramSetLen) { 1783 1784 ALOGV("parseParamSet"); 1785 CHECK(type == kNalUnitTypeSeqParamSet || 1786 type == kNalUnitTypePicParamSet); 1787 1788 const uint8_t *nextStartCode = findNextStartCode(data, length); 1789 *paramSetLen = nextStartCode - data; 1790 if (*paramSetLen == 0) { 1791 ALOGE("Param set is malformed, since its length is 0"); 1792 return NULL; 1793 } 1794 1795 AVCParamSet paramSet(*paramSetLen, data); 1796 if (type == kNalUnitTypeSeqParamSet) { 1797 if (*paramSetLen < 4) { 1798 ALOGE("Seq parameter set malformed"); 1799 return NULL; 1800 } 1801 if (mSeqParamSets.empty()) { 1802 mProfileIdc = data[1]; 1803 mProfileCompatible = data[2]; 1804 mLevelIdc = data[3]; 1805 } else { 1806 if (mProfileIdc != data[1] || 1807 mProfileCompatible != data[2] || 1808 mLevelIdc != data[3]) { 1809 ALOGE("Inconsistent profile/level found in seq parameter sets"); 1810 return NULL; 1811 } 1812 } 1813 mSeqParamSets.push_back(paramSet); 1814 } else { 1815 mPicParamSets.push_back(paramSet); 1816 } 1817 return nextStartCode; 1818} 1819 1820status_t MPEG4Writer::Track::copyAVCCodecSpecificData( 1821 const uint8_t *data, size_t size) { 1822 ALOGV("copyAVCCodecSpecificData"); 1823 1824 // 2 bytes for each of the parameter set length field 1825 // plus the 7 bytes for the header 1826 if (size < 4 + 7) { 1827 ALOGE("Codec specific data length too short: %d", size); 1828 return ERROR_MALFORMED; 1829 } 1830 1831 mCodecSpecificDataSize = size; 1832 mCodecSpecificData = malloc(size); 1833 memcpy(mCodecSpecificData, data, size); 1834 return OK; 1835} 1836 1837status_t MPEG4Writer::Track::parseAVCCodecSpecificData( 1838 const uint8_t *data, size_t size) { 1839 1840 ALOGV("parseAVCCodecSpecificData"); 1841 // Data starts with a start code. 1842 // SPS and PPS are separated with start codes. 1843 // Also, SPS must come before PPS 1844 uint8_t type = kNalUnitTypeSeqParamSet; 1845 bool gotSps = false; 1846 bool gotPps = false; 1847 const uint8_t *tmp = data; 1848 const uint8_t *nextStartCode = data; 1849 size_t bytesLeft = size; 1850 size_t paramSetLen = 0; 1851 mCodecSpecificDataSize = 0; 1852 while (bytesLeft > 4 && !memcmp("\x00\x00\x00\x01", tmp, 4)) { 1853 getNalUnitType(*(tmp + 4), &type); 1854 if (type == kNalUnitTypeSeqParamSet) { 1855 if (gotPps) { 1856 ALOGE("SPS must come before PPS"); 1857 return ERROR_MALFORMED; 1858 } 1859 if (!gotSps) { 1860 gotSps = true; 1861 } 1862 nextStartCode = parseParamSet(tmp + 4, bytesLeft - 4, type, ¶mSetLen); 1863 } else if (type == kNalUnitTypePicParamSet) { 1864 if (!gotSps) { 1865 ALOGE("SPS must come before PPS"); 1866 return ERROR_MALFORMED; 1867 } 1868 if (!gotPps) { 1869 gotPps = true; 1870 } 1871 nextStartCode = parseParamSet(tmp + 4, bytesLeft - 4, type, ¶mSetLen); 1872 } else { 1873 ALOGE("Only SPS and PPS Nal units are expected"); 1874 return ERROR_MALFORMED; 1875 } 1876 1877 if (nextStartCode == NULL) { 1878 return ERROR_MALFORMED; 1879 } 1880 1881 // Move on to find the next parameter set 1882 bytesLeft -= nextStartCode - tmp; 1883 tmp = nextStartCode; 1884 mCodecSpecificDataSize += (2 + paramSetLen); 1885 } 1886 1887 { 1888 // Check on the number of seq parameter sets 1889 size_t nSeqParamSets = mSeqParamSets.size(); 1890 if (nSeqParamSets == 0) { 1891 ALOGE("Cound not find sequence parameter set"); 1892 return ERROR_MALFORMED; 1893 } 1894 1895 if (nSeqParamSets > 0x1F) { 1896 ALOGE("Too many seq parameter sets (%d) found", nSeqParamSets); 1897 return ERROR_MALFORMED; 1898 } 1899 } 1900 1901 { 1902 // Check on the number of pic parameter sets 1903 size_t nPicParamSets = mPicParamSets.size(); 1904 if (nPicParamSets == 0) { 1905 ALOGE("Cound not find picture parameter set"); 1906 return ERROR_MALFORMED; 1907 } 1908 if (nPicParamSets > 0xFF) { 1909 ALOGE("Too many pic parameter sets (%d) found", nPicParamSets); 1910 return ERROR_MALFORMED; 1911 } 1912 } 1913// FIXME: 1914// Add chromat_format_idc, bit depth values, etc for AVC/h264 high profile and above 1915// and remove #if 0 1916#if 0 1917 { 1918 // Check on the profiles 1919 // These profiles requires additional parameter set extensions 1920 if (mProfileIdc == 100 || mProfileIdc == 110 || 1921 mProfileIdc == 122 || mProfileIdc == 144) { 1922 ALOGE("Sorry, no support for profile_idc: %d!", mProfileIdc); 1923 return BAD_VALUE; 1924 } 1925 } 1926#endif 1927 return OK; 1928} 1929 1930status_t MPEG4Writer::Track::makeAVCCodecSpecificData( 1931 const uint8_t *data, size_t size) { 1932 1933 if (mCodecSpecificData != NULL) { 1934 ALOGE("Already have codec specific data"); 1935 return ERROR_MALFORMED; 1936 } 1937 1938 if (size < 4) { 1939 ALOGE("Codec specific data length too short: %d", size); 1940 return ERROR_MALFORMED; 1941 } 1942 1943 // Data is in the form of AVCCodecSpecificData 1944 if (memcmp("\x00\x00\x00\x01", data, 4)) { 1945 return copyAVCCodecSpecificData(data, size); 1946 } 1947 1948 if (parseAVCCodecSpecificData(data, size) != OK) { 1949 return ERROR_MALFORMED; 1950 } 1951 1952 // ISO 14496-15: AVC file format 1953 mCodecSpecificDataSize += 7; // 7 more bytes in the header 1954 mCodecSpecificData = malloc(mCodecSpecificDataSize); 1955 uint8_t *header = (uint8_t *)mCodecSpecificData; 1956 header[0] = 1; // version 1957 header[1] = mProfileIdc; // profile indication 1958 header[2] = mProfileCompatible; // profile compatibility 1959 header[3] = mLevelIdc; 1960 1961 // 6-bit '111111' followed by 2-bit to lengthSizeMinuusOne 1962 if (mOwner->useNalLengthFour()) { 1963 header[4] = 0xfc | 3; // length size == 4 bytes 1964 } else { 1965 header[4] = 0xfc | 1; // length size == 2 bytes 1966 } 1967 1968 // 3-bit '111' followed by 5-bit numSequenceParameterSets 1969 int nSequenceParamSets = mSeqParamSets.size(); 1970 header[5] = 0xe0 | nSequenceParamSets; 1971 header += 6; 1972 for (List<AVCParamSet>::iterator it = mSeqParamSets.begin(); 1973 it != mSeqParamSets.end(); ++it) { 1974 // 16-bit sequence parameter set length 1975 uint16_t seqParamSetLength = it->mLength; 1976 header[0] = seqParamSetLength >> 8; 1977 header[1] = seqParamSetLength & 0xff; 1978 1979 // SPS NAL unit (sequence parameter length bytes) 1980 memcpy(&header[2], it->mData, seqParamSetLength); 1981 header += (2 + seqParamSetLength); 1982 } 1983 1984 // 8-bit nPictureParameterSets 1985 int nPictureParamSets = mPicParamSets.size(); 1986 header[0] = nPictureParamSets; 1987 header += 1; 1988 for (List<AVCParamSet>::iterator it = mPicParamSets.begin(); 1989 it != mPicParamSets.end(); ++it) { 1990 // 16-bit picture parameter set length 1991 uint16_t picParamSetLength = it->mLength; 1992 header[0] = picParamSetLength >> 8; 1993 header[1] = picParamSetLength & 0xff; 1994 1995 // PPS Nal unit (picture parameter set length bytes) 1996 memcpy(&header[2], it->mData, picParamSetLength); 1997 header += (2 + picParamSetLength); 1998 } 1999 2000 return OK; 2001} 2002 2003/* 2004 * Updates the drift time from the audio track so that 2005 * the video track can get the updated drift time information 2006 * from the file writer. The fluctuation of the drift time of the audio 2007 * encoding path is smoothed out with a simple filter by giving a larger 2008 * weight to more recently drift time. The filter coefficients, 0.5 and 0.5, 2009 * are heuristically determined. 2010 */ 2011void MPEG4Writer::Track::updateDriftTime(const sp<MetaData>& meta) { 2012 int64_t driftTimeUs = 0; 2013 if (meta->findInt64(kKeyDriftTime, &driftTimeUs)) { 2014 int64_t prevDriftTimeUs = mOwner->getDriftTimeUs(); 2015 int64_t timeUs = (driftTimeUs + prevDriftTimeUs) >> 1; 2016 mOwner->setDriftTimeUs(timeUs); 2017 } 2018} 2019 2020status_t MPEG4Writer::Track::threadEntry() { 2021 int32_t count = 0; 2022 const int64_t interleaveDurationUs = mOwner->interleaveDuration(); 2023 const bool hasMultipleTracks = (mOwner->numTracks() > 1); 2024 int64_t chunkTimestampUs = 0; 2025 int32_t nChunks = 0; 2026 int32_t nZeroLengthFrames = 0; 2027 int64_t lastTimestampUs = 0; // Previous sample time stamp 2028 int64_t lastDurationUs = 0; // Between the previous two samples 2029 int64_t currDurationTicks = 0; // Timescale based ticks 2030 int64_t lastDurationTicks = 0; // Timescale based ticks 2031 int32_t sampleCount = 1; // Sample count in the current stts table entry 2032 uint32_t previousSampleSize = 0; // Size of the previous sample 2033 int64_t previousPausedDurationUs = 0; 2034 int64_t timestampUs = 0; 2035 int64_t cttsOffsetTimeUs = 0; 2036 int64_t currCttsOffsetTimeTicks = 0; // Timescale based ticks 2037 int64_t lastCttsOffsetTimeTicks = -1; // Timescale based ticks 2038 int32_t cttsSampleCount = 0; // Sample count in the current ctts table entry 2039 uint32_t lastSamplesPerChunk = 0; 2040 2041 if (mIsAudio) { 2042 prctl(PR_SET_NAME, (unsigned long)"AudioTrackEncoding", 0, 0, 0); 2043 } else { 2044 prctl(PR_SET_NAME, (unsigned long)"VideoTrackEncoding", 0, 0, 0); 2045 } 2046 androidSetThreadPriority(0, ANDROID_PRIORITY_AUDIO); 2047 2048 sp<MetaData> meta_data; 2049 2050 status_t err = OK; 2051 MediaBuffer *buffer; 2052 while (!mDone && (err = mSource->read(&buffer)) == OK) { 2053 if (buffer->range_length() == 0) { 2054 buffer->release(); 2055 buffer = NULL; 2056 ++nZeroLengthFrames; 2057 continue; 2058 } 2059 2060 // If the codec specific data has not been received yet, delay pause. 2061 // After the codec specific data is received, discard what we received 2062 // when the track is to be paused. 2063 if (mPaused && !mResumed) { 2064 buffer->release(); 2065 buffer = NULL; 2066 continue; 2067 } 2068 2069 ++count; 2070 2071 int32_t isCodecConfig; 2072 if (buffer->meta_data()->findInt32(kKeyIsCodecConfig, &isCodecConfig) 2073 && isCodecConfig) { 2074 CHECK(!mGotAllCodecSpecificData); 2075 2076 if (mIsAvc) { 2077 status_t err = makeAVCCodecSpecificData( 2078 (const uint8_t *)buffer->data() 2079 + buffer->range_offset(), 2080 buffer->range_length()); 2081 CHECK_EQ((status_t)OK, err); 2082 } else if (mIsMPEG4) { 2083 mCodecSpecificDataSize = buffer->range_length(); 2084 mCodecSpecificData = malloc(mCodecSpecificDataSize); 2085 memcpy(mCodecSpecificData, 2086 (const uint8_t *)buffer->data() 2087 + buffer->range_offset(), 2088 buffer->range_length()); 2089 } 2090 2091 buffer->release(); 2092 buffer = NULL; 2093 2094 mGotAllCodecSpecificData = true; 2095 continue; 2096 } 2097 2098 // Make a deep copy of the MediaBuffer and Metadata and release 2099 // the original as soon as we can 2100 MediaBuffer *copy = new MediaBuffer(buffer->range_length()); 2101 memcpy(copy->data(), (uint8_t *)buffer->data() + buffer->range_offset(), 2102 buffer->range_length()); 2103 copy->set_range(0, buffer->range_length()); 2104 meta_data = new MetaData(*buffer->meta_data().get()); 2105 buffer->release(); 2106 buffer = NULL; 2107 2108 if (mIsAvc) StripStartcode(copy); 2109 2110 size_t sampleSize = copy->range_length(); 2111 if (mIsAvc) { 2112 if (mOwner->useNalLengthFour()) { 2113 sampleSize += 4; 2114 } else { 2115 sampleSize += 2; 2116 } 2117 } 2118 2119 // Max file size or duration handling 2120 mMdatSizeBytes += sampleSize; 2121 updateTrackSizeEstimate(); 2122 2123 if (mOwner->exceedsFileSizeLimit()) { 2124 mOwner->notify(MEDIA_RECORDER_EVENT_INFO, MEDIA_RECORDER_INFO_MAX_FILESIZE_REACHED, 0); 2125 break; 2126 } 2127 if (mOwner->exceedsFileDurationLimit()) { 2128 mOwner->notify(MEDIA_RECORDER_EVENT_INFO, MEDIA_RECORDER_INFO_MAX_DURATION_REACHED, 0); 2129 break; 2130 } 2131 2132 2133 int32_t isSync = false; 2134 meta_data->findInt32(kKeyIsSyncFrame, &isSync); 2135 CHECK(meta_data->findInt64(kKeyTime, ×tampUs)); 2136 2137//////////////////////////////////////////////////////////////////////////////// 2138 if (mStszTableEntries->count() == 0) { 2139 mFirstSampleTimeRealUs = systemTime() / 1000; 2140 mStartTimestampUs = timestampUs; 2141 mOwner->setStartTimestampUs(mStartTimestampUs); 2142 previousPausedDurationUs = mStartTimestampUs; 2143 } 2144 2145 if (mResumed) { 2146 int64_t durExcludingEarlierPausesUs = timestampUs - previousPausedDurationUs; 2147 CHECK_GE(durExcludingEarlierPausesUs, 0ll); 2148 int64_t pausedDurationUs = durExcludingEarlierPausesUs - mTrackDurationUs; 2149 CHECK_GE(pausedDurationUs, lastDurationUs); 2150 previousPausedDurationUs += pausedDurationUs - lastDurationUs; 2151 mResumed = false; 2152 } 2153 2154 timestampUs -= previousPausedDurationUs; 2155 CHECK_GE(timestampUs, 0ll); 2156 if (!mIsAudio) { 2157 /* 2158 * Composition time: timestampUs 2159 * Decoding time: decodingTimeUs 2160 * Composition time offset = composition time - decoding time 2161 */ 2162 int64_t decodingTimeUs; 2163 CHECK(meta_data->findInt64(kKeyDecodingTime, &decodingTimeUs)); 2164 decodingTimeUs -= previousPausedDurationUs; 2165 cttsOffsetTimeUs = 2166 timestampUs + kMaxCttsOffsetTimeUs - decodingTimeUs; 2167 CHECK_GE(cttsOffsetTimeUs, 0ll); 2168 timestampUs = decodingTimeUs; 2169 ALOGV("decoding time: %lld and ctts offset time: %lld", 2170 timestampUs, cttsOffsetTimeUs); 2171 2172 // Update ctts box table if necessary 2173 currCttsOffsetTimeTicks = 2174 (cttsOffsetTimeUs * mTimeScale + 500000LL) / 1000000LL; 2175 CHECK_LE(currCttsOffsetTimeTicks, 0x0FFFFFFFFLL); 2176 if (mStszTableEntries->count() == 0) { 2177 // Force the first ctts table entry to have one single entry 2178 // so that we can do adjustment for the initial track start 2179 // time offset easily in writeCttsBox(). 2180 lastCttsOffsetTimeTicks = currCttsOffsetTimeTicks; 2181 addOneCttsTableEntry(1, currCttsOffsetTimeTicks); 2182 cttsSampleCount = 0; // No sample in ctts box is pending 2183 } else { 2184 if (currCttsOffsetTimeTicks != lastCttsOffsetTimeTicks) { 2185 addOneCttsTableEntry(cttsSampleCount, lastCttsOffsetTimeTicks); 2186 lastCttsOffsetTimeTicks = currCttsOffsetTimeTicks; 2187 cttsSampleCount = 1; // One sample in ctts box is pending 2188 } else { 2189 ++cttsSampleCount; 2190 } 2191 } 2192 2193 // Update ctts time offset range 2194 if (mStszTableEntries->count() == 0) { 2195 mMinCttsOffsetTimeUs = currCttsOffsetTimeTicks; 2196 mMaxCttsOffsetTimeUs = currCttsOffsetTimeTicks; 2197 } else { 2198 if (currCttsOffsetTimeTicks > mMaxCttsOffsetTimeUs) { 2199 mMaxCttsOffsetTimeUs = currCttsOffsetTimeTicks; 2200 } else if (currCttsOffsetTimeTicks < mMinCttsOffsetTimeUs) { 2201 mMinCttsOffsetTimeUs = currCttsOffsetTimeTicks; 2202 } 2203 } 2204 2205 } 2206 2207 if (mIsRealTimeRecording) { 2208 if (mIsAudio) { 2209 updateDriftTime(meta_data); 2210 } 2211 } 2212 2213 CHECK_GE(timestampUs, 0ll); 2214 ALOGV("%s media time stamp: %lld and previous paused duration %lld", 2215 mIsAudio? "Audio": "Video", timestampUs, previousPausedDurationUs); 2216 if (timestampUs > mTrackDurationUs) { 2217 mTrackDurationUs = timestampUs; 2218 } 2219 2220 // We need to use the time scale based ticks, rather than the 2221 // timestamp itself to determine whether we have to use a new 2222 // stts entry, since we may have rounding errors. 2223 // The calculation is intended to reduce the accumulated 2224 // rounding errors. 2225 currDurationTicks = 2226 ((timestampUs * mTimeScale + 500000LL) / 1000000LL - 2227 (lastTimestampUs * mTimeScale + 500000LL) / 1000000LL); 2228 if (currDurationTicks < 0ll) { 2229 ALOGE("timestampUs %lld < lastTimestampUs %lld for %s track", 2230 timestampUs, lastTimestampUs, mIsAudio? "Audio": "Video"); 2231 return UNKNOWN_ERROR; 2232 } 2233 2234 mStszTableEntries->add(htonl(sampleSize)); 2235 if (mStszTableEntries->count() > 2) { 2236 2237 // Force the first sample to have its own stts entry so that 2238 // we can adjust its value later to maintain the A/V sync. 2239 if (mStszTableEntries->count() == 3 || currDurationTicks != lastDurationTicks) { 2240 addOneSttsTableEntry(sampleCount, lastDurationTicks); 2241 sampleCount = 1; 2242 } else { 2243 ++sampleCount; 2244 } 2245 2246 } 2247 if (mSamplesHaveSameSize) { 2248 if (mStszTableEntries->count() >= 2 && previousSampleSize != sampleSize) { 2249 mSamplesHaveSameSize = false; 2250 } 2251 previousSampleSize = sampleSize; 2252 } 2253 ALOGV("%s timestampUs/lastTimestampUs: %lld/%lld", 2254 mIsAudio? "Audio": "Video", timestampUs, lastTimestampUs); 2255 lastDurationUs = timestampUs - lastTimestampUs; 2256 lastDurationTicks = currDurationTicks; 2257 lastTimestampUs = timestampUs; 2258 2259 if (isSync != 0) { 2260 addOneStssTableEntry(mStszTableEntries->count()); 2261 } 2262 2263 if (mTrackingProgressStatus) { 2264 if (mPreviousTrackTimeUs <= 0) { 2265 mPreviousTrackTimeUs = mStartTimestampUs; 2266 } 2267 trackProgressStatus(timestampUs); 2268 } 2269 if (!hasMultipleTracks) { 2270 off64_t offset = mIsAvc? mOwner->addLengthPrefixedSample_l(copy) 2271 : mOwner->addSample_l(copy); 2272 2273 uint32_t count = (mOwner->use32BitFileOffset() 2274 ? mStcoTableEntries->count() 2275 : mCo64TableEntries->count()); 2276 2277 if (count == 0) { 2278 addChunkOffset(offset); 2279 } 2280 copy->release(); 2281 copy = NULL; 2282 continue; 2283 } 2284 2285 mChunkSamples.push_back(copy); 2286 if (interleaveDurationUs == 0) { 2287 addOneStscTableEntry(++nChunks, 1); 2288 bufferChunk(timestampUs); 2289 } else { 2290 if (chunkTimestampUs == 0) { 2291 chunkTimestampUs = timestampUs; 2292 } else { 2293 int64_t chunkDurationUs = timestampUs - chunkTimestampUs; 2294 if (chunkDurationUs > interleaveDurationUs) { 2295 if (chunkDurationUs > mMaxChunkDurationUs) { 2296 mMaxChunkDurationUs = chunkDurationUs; 2297 } 2298 ++nChunks; 2299 if (nChunks == 1 || // First chunk 2300 lastSamplesPerChunk != mChunkSamples.size()) { 2301 lastSamplesPerChunk = mChunkSamples.size(); 2302 addOneStscTableEntry(nChunks, lastSamplesPerChunk); 2303 } 2304 bufferChunk(timestampUs); 2305 chunkTimestampUs = timestampUs; 2306 } 2307 } 2308 } 2309 2310 } 2311 2312 if (isTrackMalFormed()) { 2313 err = ERROR_MALFORMED; 2314 } 2315 2316 mOwner->trackProgressStatus(mTrackId, -1, err); 2317 2318 // Last chunk 2319 if (!hasMultipleTracks) { 2320 addOneStscTableEntry(1, mStszTableEntries->count()); 2321 } else if (!mChunkSamples.empty()) { 2322 addOneStscTableEntry(++nChunks, mChunkSamples.size()); 2323 bufferChunk(timestampUs); 2324 } 2325 2326 // We don't really know how long the last frame lasts, since 2327 // there is no frame time after it, just repeat the previous 2328 // frame's duration. 2329 if (mStszTableEntries->count() == 1) { 2330 lastDurationUs = 0; // A single sample's duration 2331 lastDurationTicks = 0; 2332 } else { 2333 ++sampleCount; // Count for the last sample 2334 } 2335 2336 if (mStszTableEntries->count() <= 2) { 2337 addOneSttsTableEntry(1, lastDurationTicks); 2338 if (sampleCount - 1 > 0) { 2339 addOneSttsTableEntry(sampleCount - 1, lastDurationTicks); 2340 } 2341 } else { 2342 addOneSttsTableEntry(sampleCount, lastDurationTicks); 2343 } 2344 2345 // The last ctts box may not have been written yet, and this 2346 // is to make sure that we write out the last ctts box. 2347 if (currCttsOffsetTimeTicks == lastCttsOffsetTimeTicks) { 2348 if (cttsSampleCount > 0) { 2349 addOneCttsTableEntry(cttsSampleCount, lastCttsOffsetTimeTicks); 2350 } 2351 } 2352 2353 mTrackDurationUs += lastDurationUs; 2354 mReachedEOS = true; 2355 2356 sendTrackSummary(hasMultipleTracks); 2357 2358 ALOGI("Received total/0-length (%d/%d) buffers and encoded %d frames. - %s", 2359 count, nZeroLengthFrames, mStszTableEntries->count(), mIsAudio? "audio": "video"); 2360 if (mIsAudio) { 2361 ALOGI("Audio track drift time: %lld us", mOwner->getDriftTimeUs()); 2362 } 2363 2364 if (err == ERROR_END_OF_STREAM) { 2365 return OK; 2366 } 2367 return err; 2368} 2369 2370bool MPEG4Writer::Track::isTrackMalFormed() const { 2371 if (mStszTableEntries->count() == 0) { // no samples written 2372 ALOGE("The number of recorded samples is 0"); 2373 return true; 2374 } 2375 2376 if (!mIsAudio && mStssTableEntries->count() == 0) { // no sync frames for video 2377 ALOGE("There are no sync frames for video track"); 2378 return true; 2379 } 2380 2381 if (OK != checkCodecSpecificData()) { // no codec specific data 2382 return true; 2383 } 2384 2385 return false; 2386} 2387 2388void MPEG4Writer::Track::sendTrackSummary(bool hasMultipleTracks) { 2389 2390 // Send track summary only if test mode is enabled. 2391 if (!isTestModeEnabled()) { 2392 return; 2393 } 2394 2395 int trackNum = (mTrackId << 28); 2396 2397 mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2398 trackNum | MEDIA_RECORDER_TRACK_INFO_TYPE, 2399 mIsAudio? 0: 1); 2400 2401 mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2402 trackNum | MEDIA_RECORDER_TRACK_INFO_DURATION_MS, 2403 mTrackDurationUs / 1000); 2404 2405 mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2406 trackNum | MEDIA_RECORDER_TRACK_INFO_ENCODED_FRAMES, 2407 mStszTableEntries->count()); 2408 2409 { 2410 // The system delay time excluding the requested initial delay that 2411 // is used to eliminate the recording sound. 2412 int64_t startTimeOffsetUs = mOwner->getStartTimeOffsetMs() * 1000LL; 2413 if (startTimeOffsetUs < 0) { // Start time offset was not set 2414 startTimeOffsetUs = kInitialDelayTimeUs; 2415 } 2416 int64_t initialDelayUs = 2417 mFirstSampleTimeRealUs - mStartTimeRealUs - startTimeOffsetUs; 2418 2419 mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2420 trackNum | MEDIA_RECORDER_TRACK_INFO_INITIAL_DELAY_MS, 2421 (initialDelayUs) / 1000); 2422 } 2423 2424 mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2425 trackNum | MEDIA_RECORDER_TRACK_INFO_DATA_KBYTES, 2426 mMdatSizeBytes / 1024); 2427 2428 if (hasMultipleTracks) { 2429 mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2430 trackNum | MEDIA_RECORDER_TRACK_INFO_MAX_CHUNK_DUR_MS, 2431 mMaxChunkDurationUs / 1000); 2432 2433 int64_t moovStartTimeUs = mOwner->getStartTimestampUs(); 2434 if (mStartTimestampUs != moovStartTimeUs) { 2435 int64_t startTimeOffsetUs = mStartTimestampUs - moovStartTimeUs; 2436 mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2437 trackNum | MEDIA_RECORDER_TRACK_INFO_START_OFFSET_MS, 2438 startTimeOffsetUs / 1000); 2439 } 2440 } 2441} 2442 2443void MPEG4Writer::Track::trackProgressStatus(int64_t timeUs, status_t err) { 2444 ALOGV("trackProgressStatus: %lld us", timeUs); 2445 2446 if (mTrackEveryTimeDurationUs > 0 && 2447 timeUs - mPreviousTrackTimeUs >= mTrackEveryTimeDurationUs) { 2448 ALOGV("Fire time tracking progress status at %lld us", timeUs); 2449 mOwner->trackProgressStatus(mTrackId, timeUs - mPreviousTrackTimeUs, err); 2450 mPreviousTrackTimeUs = timeUs; 2451 } 2452} 2453 2454void MPEG4Writer::trackProgressStatus( 2455 size_t trackId, int64_t timeUs, status_t err) { 2456 Mutex::Autolock lock(mLock); 2457 int32_t trackNum = (trackId << 28); 2458 2459 // Error notification 2460 // Do not consider ERROR_END_OF_STREAM an error 2461 if (err != OK && err != ERROR_END_OF_STREAM) { 2462 notify(MEDIA_RECORDER_TRACK_EVENT_ERROR, 2463 trackNum | MEDIA_RECORDER_TRACK_ERROR_GENERAL, 2464 err); 2465 return; 2466 } 2467 2468 if (timeUs == -1) { 2469 // Send completion notification 2470 notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2471 trackNum | MEDIA_RECORDER_TRACK_INFO_COMPLETION_STATUS, 2472 err); 2473 } else { 2474 // Send progress status 2475 notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2476 trackNum | MEDIA_RECORDER_TRACK_INFO_PROGRESS_IN_TIME, 2477 timeUs / 1000); 2478 } 2479} 2480 2481void MPEG4Writer::setDriftTimeUs(int64_t driftTimeUs) { 2482 ALOGV("setDriftTimeUs: %lld us", driftTimeUs); 2483 Mutex::Autolock autolock(mLock); 2484 mDriftTimeUs = driftTimeUs; 2485} 2486 2487int64_t MPEG4Writer::getDriftTimeUs() { 2488 ALOGV("getDriftTimeUs: %lld us", mDriftTimeUs); 2489 Mutex::Autolock autolock(mLock); 2490 return mDriftTimeUs; 2491} 2492 2493bool MPEG4Writer::useNalLengthFour() { 2494 return mUse4ByteNalLength; 2495} 2496 2497void MPEG4Writer::Track::bufferChunk(int64_t timestampUs) { 2498 ALOGV("bufferChunk"); 2499 2500 Chunk chunk(this, timestampUs, mChunkSamples); 2501 mOwner->bufferChunk(chunk); 2502 mChunkSamples.clear(); 2503} 2504 2505int64_t MPEG4Writer::Track::getDurationUs() const { 2506 return mTrackDurationUs; 2507} 2508 2509int64_t MPEG4Writer::Track::getEstimatedTrackSizeBytes() const { 2510 return mEstimatedTrackSizeBytes; 2511} 2512 2513status_t MPEG4Writer::Track::checkCodecSpecificData() const { 2514 const char *mime; 2515 CHECK(mMeta->findCString(kKeyMIMEType, &mime)); 2516 if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AAC, mime) || 2517 !strcasecmp(MEDIA_MIMETYPE_VIDEO_MPEG4, mime) || 2518 !strcasecmp(MEDIA_MIMETYPE_VIDEO_AVC, mime)) { 2519 if (!mCodecSpecificData || 2520 mCodecSpecificDataSize <= 0) { 2521 ALOGE("Missing codec specific data"); 2522 return ERROR_MALFORMED; 2523 } 2524 } else { 2525 if (mCodecSpecificData || 2526 mCodecSpecificDataSize > 0) { 2527 ALOGE("Unexepected codec specific data found"); 2528 return ERROR_MALFORMED; 2529 } 2530 } 2531 return OK; 2532} 2533 2534void MPEG4Writer::Track::writeTrackHeader(bool use32BitOffset) { 2535 2536 ALOGV("%s track time scale: %d", 2537 mIsAudio? "Audio": "Video", mTimeScale); 2538 2539 uint32_t now = getMpeg4Time(); 2540 mOwner->beginBox("trak"); 2541 writeTkhdBox(now); 2542 mOwner->beginBox("mdia"); 2543 writeMdhdBox(now); 2544 writeHdlrBox(); 2545 mOwner->beginBox("minf"); 2546 if (mIsAudio) { 2547 writeSmhdBox(); 2548 } else { 2549 writeVmhdBox(); 2550 } 2551 writeDinfBox(); 2552 writeStblBox(use32BitOffset); 2553 mOwner->endBox(); // minf 2554 mOwner->endBox(); // mdia 2555 mOwner->endBox(); // trak 2556} 2557 2558void MPEG4Writer::Track::writeStblBox(bool use32BitOffset) { 2559 mOwner->beginBox("stbl"); 2560 mOwner->beginBox("stsd"); 2561 mOwner->writeInt32(0); // version=0, flags=0 2562 mOwner->writeInt32(1); // entry count 2563 if (mIsAudio) { 2564 writeAudioFourCCBox(); 2565 } else { 2566 writeVideoFourCCBox(); 2567 } 2568 mOwner->endBox(); // stsd 2569 writeSttsBox(); 2570 writeCttsBox(); 2571 if (!mIsAudio) { 2572 writeStssBox(); 2573 } 2574 writeStszBox(); 2575 writeStscBox(); 2576 writeStcoBox(use32BitOffset); 2577 mOwner->endBox(); // stbl 2578} 2579 2580void MPEG4Writer::Track::writeVideoFourCCBox() { 2581 const char *mime; 2582 bool success = mMeta->findCString(kKeyMIMEType, &mime); 2583 CHECK(success); 2584 if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_MPEG4, mime)) { 2585 mOwner->beginBox("mp4v"); 2586 } else if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_H263, mime)) { 2587 mOwner->beginBox("s263"); 2588 } else if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_AVC, mime)) { 2589 mOwner->beginBox("avc1"); 2590 } else { 2591 ALOGE("Unknown mime type '%s'.", mime); 2592 CHECK(!"should not be here, unknown mime type."); 2593 } 2594 2595 mOwner->writeInt32(0); // reserved 2596 mOwner->writeInt16(0); // reserved 2597 mOwner->writeInt16(1); // data ref index 2598 mOwner->writeInt16(0); // predefined 2599 mOwner->writeInt16(0); // reserved 2600 mOwner->writeInt32(0); // predefined 2601 mOwner->writeInt32(0); // predefined 2602 mOwner->writeInt32(0); // predefined 2603 2604 int32_t width, height; 2605 success = mMeta->findInt32(kKeyWidth, &width); 2606 success = success && mMeta->findInt32(kKeyHeight, &height); 2607 CHECK(success); 2608 2609 mOwner->writeInt16(width); 2610 mOwner->writeInt16(height); 2611 mOwner->writeInt32(0x480000); // horiz resolution 2612 mOwner->writeInt32(0x480000); // vert resolution 2613 mOwner->writeInt32(0); // reserved 2614 mOwner->writeInt16(1); // frame count 2615 mOwner->writeInt8(0); // compressor string length 2616 mOwner->write(" ", 31); 2617 mOwner->writeInt16(0x18); // depth 2618 mOwner->writeInt16(-1); // predefined 2619 2620 CHECK_LT(23 + mCodecSpecificDataSize, 128); 2621 2622 if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_MPEG4, mime)) { 2623 writeMp4vEsdsBox(); 2624 } else if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_H263, mime)) { 2625 writeD263Box(); 2626 } else if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_AVC, mime)) { 2627 writeAvccBox(); 2628 } 2629 2630 writePaspBox(); 2631 mOwner->endBox(); // mp4v, s263 or avc1 2632} 2633 2634void MPEG4Writer::Track::writeAudioFourCCBox() { 2635 const char *mime; 2636 bool success = mMeta->findCString(kKeyMIMEType, &mime); 2637 CHECK(success); 2638 const char *fourcc = NULL; 2639 if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AMR_NB, mime)) { 2640 fourcc = "samr"; 2641 } else if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AMR_WB, mime)) { 2642 fourcc = "sawb"; 2643 } else if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AAC, mime)) { 2644 fourcc = "mp4a"; 2645 } else { 2646 ALOGE("Unknown mime type '%s'.", mime); 2647 CHECK(!"should not be here, unknown mime type."); 2648 } 2649 2650 mOwner->beginBox(fourcc); // audio format 2651 mOwner->writeInt32(0); // reserved 2652 mOwner->writeInt16(0); // reserved 2653 mOwner->writeInt16(0x1); // data ref index 2654 mOwner->writeInt32(0); // reserved 2655 mOwner->writeInt32(0); // reserved 2656 int32_t nChannels; 2657 CHECK_EQ(true, mMeta->findInt32(kKeyChannelCount, &nChannels)); 2658 mOwner->writeInt16(nChannels); // channel count 2659 mOwner->writeInt16(16); // sample size 2660 mOwner->writeInt16(0); // predefined 2661 mOwner->writeInt16(0); // reserved 2662 2663 int32_t samplerate; 2664 success = mMeta->findInt32(kKeySampleRate, &samplerate); 2665 CHECK(success); 2666 mOwner->writeInt32(samplerate << 16); 2667 if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AAC, mime)) { 2668 writeMp4aEsdsBox(); 2669 } else if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AMR_NB, mime) || 2670 !strcasecmp(MEDIA_MIMETYPE_AUDIO_AMR_WB, mime)) { 2671 writeDamrBox(); 2672 } 2673 mOwner->endBox(); 2674} 2675 2676void MPEG4Writer::Track::writeMp4aEsdsBox() { 2677 mOwner->beginBox("esds"); 2678 CHECK(mCodecSpecificData); 2679 CHECK_GT(mCodecSpecificDataSize, 0); 2680 2681 // Make sure all sizes encode to a single byte. 2682 CHECK_LT(mCodecSpecificDataSize + 23, 128); 2683 2684 mOwner->writeInt32(0); // version=0, flags=0 2685 mOwner->writeInt8(0x03); // ES_DescrTag 2686 mOwner->writeInt8(23 + mCodecSpecificDataSize); 2687 mOwner->writeInt16(0x0000);// ES_ID 2688 mOwner->writeInt8(0x00); 2689 2690 mOwner->writeInt8(0x04); // DecoderConfigDescrTag 2691 mOwner->writeInt8(15 + mCodecSpecificDataSize); 2692 mOwner->writeInt8(0x40); // objectTypeIndication ISO/IEC 14492-2 2693 mOwner->writeInt8(0x15); // streamType AudioStream 2694 2695 mOwner->writeInt16(0x03); // XXX 2696 mOwner->writeInt8(0x00); // buffer size 24-bit 2697 mOwner->writeInt32(96000); // max bit rate 2698 mOwner->writeInt32(96000); // avg bit rate 2699 2700 mOwner->writeInt8(0x05); // DecoderSpecificInfoTag 2701 mOwner->writeInt8(mCodecSpecificDataSize); 2702 mOwner->write(mCodecSpecificData, mCodecSpecificDataSize); 2703 2704 static const uint8_t kData2[] = { 2705 0x06, // SLConfigDescriptorTag 2706 0x01, 2707 0x02 2708 }; 2709 mOwner->write(kData2, sizeof(kData2)); 2710 2711 mOwner->endBox(); // esds 2712} 2713 2714void MPEG4Writer::Track::writeMp4vEsdsBox() { 2715 CHECK(mCodecSpecificData); 2716 CHECK_GT(mCodecSpecificDataSize, 0); 2717 mOwner->beginBox("esds"); 2718 2719 mOwner->writeInt32(0); // version=0, flags=0 2720 2721 mOwner->writeInt8(0x03); // ES_DescrTag 2722 mOwner->writeInt8(23 + mCodecSpecificDataSize); 2723 mOwner->writeInt16(0x0000); // ES_ID 2724 mOwner->writeInt8(0x1f); 2725 2726 mOwner->writeInt8(0x04); // DecoderConfigDescrTag 2727 mOwner->writeInt8(15 + mCodecSpecificDataSize); 2728 mOwner->writeInt8(0x20); // objectTypeIndication ISO/IEC 14492-2 2729 mOwner->writeInt8(0x11); // streamType VisualStream 2730 2731 static const uint8_t kData[] = { 2732 0x01, 0x77, 0x00, 2733 0x00, 0x03, 0xe8, 0x00, 2734 0x00, 0x03, 0xe8, 0x00 2735 }; 2736 mOwner->write(kData, sizeof(kData)); 2737 2738 mOwner->writeInt8(0x05); // DecoderSpecificInfoTag 2739 2740 mOwner->writeInt8(mCodecSpecificDataSize); 2741 mOwner->write(mCodecSpecificData, mCodecSpecificDataSize); 2742 2743 static const uint8_t kData2[] = { 2744 0x06, // SLConfigDescriptorTag 2745 0x01, 2746 0x02 2747 }; 2748 mOwner->write(kData2, sizeof(kData2)); 2749 2750 mOwner->endBox(); // esds 2751} 2752 2753void MPEG4Writer::Track::writeTkhdBox(uint32_t now) { 2754 mOwner->beginBox("tkhd"); 2755 // Flags = 7 to indicate that the track is enabled, and 2756 // part of the presentation 2757 mOwner->writeInt32(0x07); // version=0, flags=7 2758 mOwner->writeInt32(now); // creation time 2759 mOwner->writeInt32(now); // modification time 2760 mOwner->writeInt32(mTrackId); // track id starts with 1 2761 mOwner->writeInt32(0); // reserved 2762 int64_t trakDurationUs = getDurationUs(); 2763 int32_t mvhdTimeScale = mOwner->getTimeScale(); 2764 int32_t tkhdDuration = 2765 (trakDurationUs * mvhdTimeScale + 5E5) / 1E6; 2766 mOwner->writeInt32(tkhdDuration); // in mvhd timescale 2767 mOwner->writeInt32(0); // reserved 2768 mOwner->writeInt32(0); // reserved 2769 mOwner->writeInt16(0); // layer 2770 mOwner->writeInt16(0); // alternate group 2771 mOwner->writeInt16(mIsAudio ? 0x100 : 0); // volume 2772 mOwner->writeInt16(0); // reserved 2773 2774 mOwner->writeCompositionMatrix(mRotation); // matrix 2775 2776 if (mIsAudio) { 2777 mOwner->writeInt32(0); 2778 mOwner->writeInt32(0); 2779 } else { 2780 int32_t width, height; 2781 bool success = mMeta->findInt32(kKeyWidth, &width); 2782 success = success && mMeta->findInt32(kKeyHeight, &height); 2783 CHECK(success); 2784 2785 mOwner->writeInt32(width << 16); // 32-bit fixed-point value 2786 mOwner->writeInt32(height << 16); // 32-bit fixed-point value 2787 } 2788 mOwner->endBox(); // tkhd 2789} 2790 2791void MPEG4Writer::Track::writeVmhdBox() { 2792 mOwner->beginBox("vmhd"); 2793 mOwner->writeInt32(0x01); // version=0, flags=1 2794 mOwner->writeInt16(0); // graphics mode 2795 mOwner->writeInt16(0); // opcolor 2796 mOwner->writeInt16(0); 2797 mOwner->writeInt16(0); 2798 mOwner->endBox(); 2799} 2800 2801void MPEG4Writer::Track::writeSmhdBox() { 2802 mOwner->beginBox("smhd"); 2803 mOwner->writeInt32(0); // version=0, flags=0 2804 mOwner->writeInt16(0); // balance 2805 mOwner->writeInt16(0); // reserved 2806 mOwner->endBox(); 2807} 2808 2809void MPEG4Writer::Track::writeHdlrBox() { 2810 mOwner->beginBox("hdlr"); 2811 mOwner->writeInt32(0); // version=0, flags=0 2812 mOwner->writeInt32(0); // component type: should be mhlr 2813 mOwner->writeFourcc(mIsAudio ? "soun" : "vide"); // component subtype 2814 mOwner->writeInt32(0); // reserved 2815 mOwner->writeInt32(0); // reserved 2816 mOwner->writeInt32(0); // reserved 2817 // Removing "r" for the name string just makes the string 4 byte aligned 2818 mOwner->writeCString(mIsAudio ? "SoundHandle": "VideoHandle"); // name 2819 mOwner->endBox(); 2820} 2821 2822void MPEG4Writer::Track::writeMdhdBox(uint32_t now) { 2823 int64_t trakDurationUs = getDurationUs(); 2824 mOwner->beginBox("mdhd"); 2825 mOwner->writeInt32(0); // version=0, flags=0 2826 mOwner->writeInt32(now); // creation time 2827 mOwner->writeInt32(now); // modification time 2828 mOwner->writeInt32(mTimeScale); // media timescale 2829 int32_t mdhdDuration = (trakDurationUs * mTimeScale + 5E5) / 1E6; 2830 mOwner->writeInt32(mdhdDuration); // use media timescale 2831 // Language follows the three letter standard ISO-639-2/T 2832 // 'e', 'n', 'g' for "English", for instance. 2833 // Each character is packed as the difference between its ASCII value and 0x60. 2834 // For "English", these are 00101, 01110, 00111. 2835 // XXX: Where is the padding bit located: 0x15C7? 2836 mOwner->writeInt16(0); // language code 2837 mOwner->writeInt16(0); // predefined 2838 mOwner->endBox(); 2839} 2840 2841void MPEG4Writer::Track::writeDamrBox() { 2842 // 3gpp2 Spec AMRSampleEntry fields 2843 mOwner->beginBox("damr"); 2844 mOwner->writeCString(" "); // vendor: 4 bytes 2845 mOwner->writeInt8(0); // decoder version 2846 mOwner->writeInt16(0x83FF); // mode set: all enabled 2847 mOwner->writeInt8(0); // mode change period 2848 mOwner->writeInt8(1); // frames per sample 2849 mOwner->endBox(); 2850} 2851 2852void MPEG4Writer::Track::writeUrlBox() { 2853 // The table index here refers to the sample description index 2854 // in the sample table entries. 2855 mOwner->beginBox("url "); 2856 mOwner->writeInt32(1); // version=0, flags=1 (self-contained) 2857 mOwner->endBox(); // url 2858} 2859 2860void MPEG4Writer::Track::writeDrefBox() { 2861 mOwner->beginBox("dref"); 2862 mOwner->writeInt32(0); // version=0, flags=0 2863 mOwner->writeInt32(1); // entry count (either url or urn) 2864 writeUrlBox(); 2865 mOwner->endBox(); // dref 2866} 2867 2868void MPEG4Writer::Track::writeDinfBox() { 2869 mOwner->beginBox("dinf"); 2870 writeDrefBox(); 2871 mOwner->endBox(); // dinf 2872} 2873 2874void MPEG4Writer::Track::writeAvccBox() { 2875 CHECK(mCodecSpecificData); 2876 CHECK_GE(mCodecSpecificDataSize, 5); 2877 2878 // Patch avcc's lengthSize field to match the number 2879 // of bytes we use to indicate the size of a nal unit. 2880 uint8_t *ptr = (uint8_t *)mCodecSpecificData; 2881 ptr[4] = (ptr[4] & 0xfc) | (mOwner->useNalLengthFour() ? 3 : 1); 2882 mOwner->beginBox("avcC"); 2883 mOwner->write(mCodecSpecificData, mCodecSpecificDataSize); 2884 mOwner->endBox(); // avcC 2885} 2886 2887void MPEG4Writer::Track::writeD263Box() { 2888 mOwner->beginBox("d263"); 2889 mOwner->writeInt32(0); // vendor 2890 mOwner->writeInt8(0); // decoder version 2891 mOwner->writeInt8(10); // level: 10 2892 mOwner->writeInt8(0); // profile: 0 2893 mOwner->endBox(); // d263 2894} 2895 2896// This is useful if the pixel is not square 2897void MPEG4Writer::Track::writePaspBox() { 2898 mOwner->beginBox("pasp"); 2899 mOwner->writeInt32(1 << 16); // hspacing 2900 mOwner->writeInt32(1 << 16); // vspacing 2901 mOwner->endBox(); // pasp 2902} 2903 2904int32_t MPEG4Writer::Track::getStartTimeOffsetScaledTime() const { 2905 int64_t trackStartTimeOffsetUs = 0; 2906 int64_t moovStartTimeUs = mOwner->getStartTimestampUs(); 2907 if (mStartTimestampUs != moovStartTimeUs) { 2908 CHECK_GT(mStartTimestampUs, moovStartTimeUs); 2909 trackStartTimeOffsetUs = mStartTimestampUs - moovStartTimeUs; 2910 } 2911 return (trackStartTimeOffsetUs * mTimeScale + 500000LL) / 1000000LL; 2912} 2913 2914void MPEG4Writer::Track::writeSttsBox() { 2915 mOwner->beginBox("stts"); 2916 mOwner->writeInt32(0); // version=0, flags=0 2917 uint32_t duration; 2918 CHECK(mSttsTableEntries->get(duration, 1)); 2919 duration = htonl(duration); // Back to host byte order 2920 mSttsTableEntries->set(htonl(duration + getStartTimeOffsetScaledTime()), 1); 2921 mSttsTableEntries->write(mOwner); 2922 mOwner->endBox(); // stts 2923} 2924 2925void MPEG4Writer::Track::writeCttsBox() { 2926 if (mIsAudio) { // ctts is not for audio 2927 return; 2928 } 2929 2930 // There is no B frame at all 2931 if (mMinCttsOffsetTimeUs == mMaxCttsOffsetTimeUs) { 2932 return; 2933 } 2934 2935 // Do not write ctts box when there is no need to have it. 2936 if (mCttsTableEntries->count() == 0) { 2937 return; 2938 } 2939 2940 ALOGV("ctts box has %d entries with range [%lld, %lld]", 2941 mCttsTableEntries->count(), mMinCttsOffsetTimeUs, mMaxCttsOffsetTimeUs); 2942 2943 mOwner->beginBox("ctts"); 2944 mOwner->writeInt32(0); // version=0, flags=0 2945 uint32_t duration; 2946 CHECK(mCttsTableEntries->get(duration, 1)); 2947 duration = htonl(duration); // Back host byte order 2948 mCttsTableEntries->set(htonl(duration + getStartTimeOffsetScaledTime() - mMinCttsOffsetTimeUs), 1); 2949 mCttsTableEntries->write(mOwner); 2950 mOwner->endBox(); // ctts 2951} 2952 2953void MPEG4Writer::Track::writeStssBox() { 2954 mOwner->beginBox("stss"); 2955 mOwner->writeInt32(0); // version=0, flags=0 2956 mStssTableEntries->write(mOwner); 2957 mOwner->endBox(); // stss 2958} 2959 2960void MPEG4Writer::Track::writeStszBox() { 2961 mOwner->beginBox("stsz"); 2962 mOwner->writeInt32(0); // version=0, flags=0 2963 mOwner->writeInt32(0); 2964 mStszTableEntries->write(mOwner); 2965 mOwner->endBox(); // stsz 2966} 2967 2968void MPEG4Writer::Track::writeStscBox() { 2969 mOwner->beginBox("stsc"); 2970 mOwner->writeInt32(0); // version=0, flags=0 2971 mStscTableEntries->write(mOwner); 2972 mOwner->endBox(); // stsc 2973} 2974 2975void MPEG4Writer::Track::writeStcoBox(bool use32BitOffset) { 2976 mOwner->beginBox(use32BitOffset? "stco": "co64"); 2977 mOwner->writeInt32(0); // version=0, flags=0 2978 if (use32BitOffset) { 2979 mStcoTableEntries->write(mOwner); 2980 } else { 2981 mCo64TableEntries->write(mOwner); 2982 } 2983 mOwner->endBox(); // stco or co64 2984} 2985 2986void MPEG4Writer::writeUdtaBox() { 2987 beginBox("udta"); 2988 writeGeoDataBox(); 2989 endBox(); 2990} 2991 2992/* 2993 * Geodata is stored according to ISO-6709 standard. 2994 */ 2995void MPEG4Writer::writeGeoDataBox() { 2996 beginBox("\xA9xyz"); 2997 /* 2998 * For historical reasons, any user data start 2999 * with "\0xA9", must be followed by its assoicated 3000 * language code. 3001 * 0x0012: text string length 3002 * 0x15c7: lang (locale) code: en 3003 */ 3004 writeInt32(0x001215c7); 3005 writeLatitude(mLatitudex10000); 3006 writeLongitude(mLongitudex10000); 3007 writeInt8(0x2F); 3008 endBox(); 3009} 3010 3011} // namespace android 3012