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 43 namespace android { 44 45 static const int64_t kMinStreamableFileSizeInBytes = 5 * 1024 * 1024; 46 static const int64_t kMax32BitFileSize = 0x00ffffffffLL; // 2^32-1 : max FAT32 47 // filesystem file size 48 // used by most SD cards 49 static const uint8_t kNalUnitTypeSeqParamSet = 0x07; 50 static const uint8_t kNalUnitTypePicParamSet = 0x08; 51 static const int64_t kInitialDelayTimeUs = 700000LL; 52 53 class MPEG4Writer::Track { 54 public: 55 Track(MPEG4Writer *owner, const sp<MediaSource> &source, size_t trackId); 56 57 ~Track(); 58 59 status_t start(MetaData *params); 60 status_t stop(); 61 status_t pause(); 62 bool reachedEOS(); 63 64 int64_t getDurationUs() const; 65 int64_t getEstimatedTrackSizeBytes() const; 66 void writeTrackHeader(bool use32BitOffset = true); 67 void bufferChunk(int64_t timestampUs); 68 bool isAvc() const { return mIsAvc; } 69 bool isAudio() const { return mIsAudio; } 70 bool isMPEG4() const { return mIsMPEG4; } 71 void addChunkOffset(off64_t offset); 72 int32_t getTrackId() const { return mTrackId; } 73 status_t dump(int fd, const Vector<String16>& args) const; 74 75 private: 76 enum { 77 kMaxCttsOffsetTimeUs = 1000000LL, // 1 second 78 kSampleArraySize = 1000, 79 }; 80 81 // A helper class to handle faster write box with table entries 82 template<class TYPE> 83 struct ListTableEntries { 84 ListTableEntries(uint32_t elementCapacity, uint32_t entryCapacity) 85 : mElementCapacity(elementCapacity), 86 mEntryCapacity(entryCapacity), 87 mTotalNumTableEntries(0), 88 mNumValuesInCurrEntry(0), 89 mCurrTableEntriesElement(NULL) { 90 CHECK_GT(mElementCapacity, 0); 91 CHECK_GT(mEntryCapacity, 0); 92 } 93 94 // Free the allocated memory. 95 ~ListTableEntries() { 96 while (!mTableEntryList.empty()) { 97 typename List<TYPE *>::iterator it = mTableEntryList.begin(); 98 delete[] (*it); 99 mTableEntryList.erase(it); 100 } 101 } 102 103 // Replace the value at the given position by the given value. 104 // There must be an existing value at the given position. 105 // @arg value must be in network byte order 106 // @arg pos location the value must be in. 107 void set(const TYPE& value, uint32_t pos) { 108 CHECK_LT(pos, mTotalNumTableEntries * mEntryCapacity); 109 110 typename List<TYPE *>::iterator it = mTableEntryList.begin(); 111 uint32_t iterations = (pos / (mElementCapacity * mEntryCapacity)); 112 while (it != mTableEntryList.end() && iterations > 0) { 113 ++it; 114 --iterations; 115 } 116 CHECK(it != mTableEntryList.end()); 117 CHECK_EQ(iterations, 0); 118 119 (*it)[(pos % (mElementCapacity * mEntryCapacity))] = value; 120 } 121 122 // Get the value at the given position by the given value. 123 // @arg value the retrieved value at the position in network byte order. 124 // @arg pos location the value must be in. 125 // @return true if a value is found. 126 bool get(TYPE& value, uint32_t pos) const { 127 if (pos >= mTotalNumTableEntries * mEntryCapacity) { 128 return false; 129 } 130 131 typename List<TYPE *>::iterator it = mTableEntryList.begin(); 132 uint32_t iterations = (pos / (mElementCapacity * mEntryCapacity)); 133 while (it != mTableEntryList.end() && iterations > 0) { 134 ++it; 135 --iterations; 136 } 137 CHECK(it != mTableEntryList.end()); 138 CHECK_EQ(iterations, 0); 139 140 value = (*it)[(pos % (mElementCapacity * mEntryCapacity))]; 141 return true; 142 } 143 144 // Store a single value. 145 // @arg value must be in network byte order. 146 void add(const TYPE& value) { 147 CHECK_LT(mNumValuesInCurrEntry, mElementCapacity); 148 uint32_t nEntries = mTotalNumTableEntries % mElementCapacity; 149 uint32_t nValues = mNumValuesInCurrEntry % mEntryCapacity; 150 if (nEntries == 0 && nValues == 0) { 151 mCurrTableEntriesElement = new TYPE[mEntryCapacity * mElementCapacity]; 152 CHECK(mCurrTableEntriesElement != NULL); 153 mTableEntryList.push_back(mCurrTableEntriesElement); 154 } 155 156 uint32_t pos = nEntries * mEntryCapacity + nValues; 157 mCurrTableEntriesElement[pos] = value; 158 159 ++mNumValuesInCurrEntry; 160 if ((mNumValuesInCurrEntry % mEntryCapacity) == 0) { 161 ++mTotalNumTableEntries; 162 mNumValuesInCurrEntry = 0; 163 } 164 } 165 166 // Write out the table entries: 167 // 1. the number of entries goes first 168 // 2. followed by the values in the table enties in order 169 // @arg writer the writer to actual write to the storage 170 void write(MPEG4Writer *writer) const { 171 CHECK_EQ(mNumValuesInCurrEntry % mEntryCapacity, 0); 172 uint32_t nEntries = mTotalNumTableEntries; 173 writer->writeInt32(nEntries); 174 for (typename List<TYPE *>::iterator it = mTableEntryList.begin(); 175 it != mTableEntryList.end(); ++it) { 176 CHECK_GT(nEntries, 0); 177 if (nEntries >= mElementCapacity) { 178 writer->write(*it, sizeof(TYPE) * mEntryCapacity, mElementCapacity); 179 nEntries -= mElementCapacity; 180 } else { 181 writer->write(*it, sizeof(TYPE) * mEntryCapacity, nEntries); 182 break; 183 } 184 } 185 } 186 187 // Return the number of entries in the table. 188 uint32_t count() const { return mTotalNumTableEntries; } 189 190 private: 191 uint32_t mElementCapacity; // # entries in an element 192 uint32_t mEntryCapacity; // # of values in each entry 193 uint32_t mTotalNumTableEntries; 194 uint32_t mNumValuesInCurrEntry; // up to mEntryCapacity 195 TYPE *mCurrTableEntriesElement; 196 mutable List<TYPE *> mTableEntryList; 197 198 DISALLOW_EVIL_CONSTRUCTORS(ListTableEntries); 199 }; 200 201 202 203 MPEG4Writer *mOwner; 204 sp<MetaData> mMeta; 205 sp<MediaSource> mSource; 206 volatile bool mDone; 207 volatile bool mPaused; 208 volatile bool mResumed; 209 volatile bool mStarted; 210 bool mIsAvc; 211 bool mIsAudio; 212 bool mIsMPEG4; 213 int32_t mTrackId; 214 int64_t mTrackDurationUs; 215 int64_t mMaxChunkDurationUs; 216 217 int64_t mEstimatedTrackSizeBytes; 218 int64_t mMdatSizeBytes; 219 int32_t mTimeScale; 220 221 pthread_t mThread; 222 223 224 List<MediaBuffer *> mChunkSamples; 225 226 bool mSamplesHaveSameSize; 227 ListTableEntries<uint32_t> *mStszTableEntries; 228 229 ListTableEntries<uint32_t> *mStcoTableEntries; 230 ListTableEntries<off64_t> *mCo64TableEntries; 231 ListTableEntries<uint32_t> *mStscTableEntries; 232 ListTableEntries<uint32_t> *mStssTableEntries; 233 ListTableEntries<uint32_t> *mSttsTableEntries; 234 ListTableEntries<uint32_t> *mCttsTableEntries; 235 236 int64_t mMinCttsOffsetTimeUs; 237 int64_t mMaxCttsOffsetTimeUs; 238 239 // Sequence parameter set or picture parameter set 240 struct AVCParamSet { 241 AVCParamSet(uint16_t length, const uint8_t *data) 242 : mLength(length), mData(data) {} 243 244 uint16_t mLength; 245 const uint8_t *mData; 246 }; 247 List<AVCParamSet> mSeqParamSets; 248 List<AVCParamSet> mPicParamSets; 249 uint8_t mProfileIdc; 250 uint8_t mProfileCompatible; 251 uint8_t mLevelIdc; 252 253 void *mCodecSpecificData; 254 size_t mCodecSpecificDataSize; 255 bool mGotAllCodecSpecificData; 256 bool mTrackingProgressStatus; 257 258 bool mReachedEOS; 259 int64_t mStartTimestampUs; 260 int64_t mStartTimeRealUs; 261 int64_t mFirstSampleTimeRealUs; 262 int64_t mPreviousTrackTimeUs; 263 int64_t mTrackEveryTimeDurationUs; 264 265 // Update the audio track's drift information. 266 void updateDriftTime(const sp<MetaData>& meta); 267 268 int32_t getStartTimeOffsetScaledTime() const; 269 270 static void *ThreadWrapper(void *me); 271 status_t threadEntry(); 272 273 const uint8_t *parseParamSet( 274 const uint8_t *data, size_t length, int type, size_t *paramSetLen); 275 276 status_t makeAVCCodecSpecificData(const uint8_t *data, size_t size); 277 status_t copyAVCCodecSpecificData(const uint8_t *data, size_t size); 278 status_t parseAVCCodecSpecificData(const uint8_t *data, size_t size); 279 280 // Track authoring progress status 281 void trackProgressStatus(int64_t timeUs, status_t err = OK); 282 void initTrackingProgressStatus(MetaData *params); 283 284 void getCodecSpecificDataFromInputFormatIfPossible(); 285 286 // Determine the track time scale 287 // If it is an audio track, try to use the sampling rate as 288 // the time scale; however, if user chooses the overwrite 289 // value, the user-supplied time scale will be used. 290 void setTimeScale(); 291 292 // Simple validation on the codec specific data 293 status_t checkCodecSpecificData() const; 294 int32_t mRotation; 295 296 void updateTrackSizeEstimate(); 297 void addOneStscTableEntry(size_t chunkId, size_t sampleId); 298 void addOneStssTableEntry(size_t sampleId); 299 300 // Duration is time scale based 301 void addOneSttsTableEntry(size_t sampleCount, int32_t timescaledDur); 302 void addOneCttsTableEntry(size_t sampleCount, int32_t timescaledDur); 303 304 bool isTrackMalFormed() const; 305 void sendTrackSummary(bool hasMultipleTracks); 306 307 // Write the boxes 308 void writeStcoBox(bool use32BitOffset); 309 void writeStscBox(); 310 void writeStszBox(); 311 void writeStssBox(); 312 void writeSttsBox(); 313 void writeCttsBox(); 314 void writeD263Box(); 315 void writePaspBox(); 316 void writeAvccBox(); 317 void writeUrlBox(); 318 void writeDrefBox(); 319 void writeDinfBox(); 320 void writeDamrBox(); 321 void writeMdhdBox(uint32_t now); 322 void writeSmhdBox(); 323 void writeVmhdBox(); 324 void writeHdlrBox(); 325 void writeTkhdBox(uint32_t now); 326 void writeMp4aEsdsBox(); 327 void writeMp4vEsdsBox(); 328 void writeAudioFourCCBox(); 329 void writeVideoFourCCBox(); 330 void writeStblBox(bool use32BitOffset); 331 332 Track(const Track &); 333 Track &operator=(const Track &); 334 }; 335 336 MPEG4Writer::MPEG4Writer(const char *filename) 337 : mFd(-1), 338 mInitCheck(NO_INIT), 339 mIsRealTimeRecording(true), 340 mUse4ByteNalLength(true), 341 mUse32BitOffset(true), 342 mIsFileSizeLimitExplicitlyRequested(false), 343 mPaused(false), 344 mStarted(false), 345 mWriterThreadStarted(false), 346 mOffset(0), 347 mMdatOffset(0), 348 mEstimatedMoovBoxSize(0), 349 mInterleaveDurationUs(1000000), 350 mLatitudex10000(0), 351 mLongitudex10000(0), 352 mAreGeoTagsAvailable(false), 353 mStartTimeOffsetMs(-1) { 354 355 mFd = open(filename, O_CREAT | O_LARGEFILE | O_TRUNC | O_RDWR, S_IRUSR | S_IWUSR); 356 if (mFd >= 0) { 357 mInitCheck = OK; 358 } 359 } 360 361 MPEG4Writer::MPEG4Writer(int fd) 362 : mFd(dup(fd)), 363 mInitCheck(mFd < 0? NO_INIT: OK), 364 mIsRealTimeRecording(true), 365 mUse4ByteNalLength(true), 366 mUse32BitOffset(true), 367 mIsFileSizeLimitExplicitlyRequested(false), 368 mPaused(false), 369 mStarted(false), 370 mWriterThreadStarted(false), 371 mOffset(0), 372 mMdatOffset(0), 373 mEstimatedMoovBoxSize(0), 374 mInterleaveDurationUs(1000000), 375 mLatitudex10000(0), 376 mLongitudex10000(0), 377 mAreGeoTagsAvailable(false), 378 mStartTimeOffsetMs(-1) { 379 } 380 381 MPEG4Writer::~MPEG4Writer() { 382 reset(); 383 384 while (!mTracks.empty()) { 385 List<Track *>::iterator it = mTracks.begin(); 386 delete *it; 387 (*it) = NULL; 388 mTracks.erase(it); 389 } 390 mTracks.clear(); 391 } 392 393 status_t MPEG4Writer::dump( 394 int fd, const Vector<String16>& args) { 395 const size_t SIZE = 256; 396 char buffer[SIZE]; 397 String8 result; 398 snprintf(buffer, SIZE, " MPEG4Writer %p\n", this); 399 result.append(buffer); 400 snprintf(buffer, SIZE, " mStarted: %s\n", mStarted? "true": "false"); 401 result.append(buffer); 402 ::write(fd, result.string(), result.size()); 403 for (List<Track *>::iterator it = mTracks.begin(); 404 it != mTracks.end(); ++it) { 405 (*it)->dump(fd, args); 406 } 407 return OK; 408 } 409 410 status_t MPEG4Writer::Track::dump( 411 int fd, const Vector<String16>& args) const { 412 const size_t SIZE = 256; 413 char buffer[SIZE]; 414 String8 result; 415 snprintf(buffer, SIZE, " %s track\n", mIsAudio? "Audio": "Video"); 416 result.append(buffer); 417 snprintf(buffer, SIZE, " reached EOS: %s\n", 418 mReachedEOS? "true": "false"); 419 result.append(buffer); 420 snprintf(buffer, SIZE, " frames encoded : %d\n", mStszTableEntries->count()); 421 result.append(buffer); 422 snprintf(buffer, SIZE, " duration encoded : %lld us\n", mTrackDurationUs); 423 result.append(buffer); 424 ::write(fd, result.string(), result.size()); 425 return OK; 426 } 427 428 status_t MPEG4Writer::addSource(const sp<MediaSource> &source) { 429 Mutex::Autolock l(mLock); 430 if (mStarted) { 431 ALOGE("Attempt to add source AFTER recording is started"); 432 return UNKNOWN_ERROR; 433 } 434 435 // At most 2 tracks can be supported. 436 if (mTracks.size() >= 2) { 437 ALOGE("Too many tracks (%d) to add", mTracks.size()); 438 return ERROR_UNSUPPORTED; 439 } 440 441 CHECK(source.get() != NULL); 442 443 // A track of type other than video or audio is not supported. 444 const char *mime; 445 source->getFormat()->findCString(kKeyMIMEType, &mime); 446 bool isAudio = !strncasecmp(mime, "audio/", 6); 447 bool isVideo = !strncasecmp(mime, "video/", 6); 448 if (!isAudio && !isVideo) { 449 ALOGE("Track (%s) other than video or audio is not supported", 450 mime); 451 return ERROR_UNSUPPORTED; 452 } 453 454 // At this point, we know the track to be added is either 455 // video or audio. Thus, we only need to check whether it 456 // is an audio track or not (if it is not, then it must be 457 // a video track). 458 459 // No more than one video or one audio track is supported. 460 for (List<Track*>::iterator it = mTracks.begin(); 461 it != mTracks.end(); ++it) { 462 if ((*it)->isAudio() == isAudio) { 463 ALOGE("%s track already exists", isAudio? "Audio": "Video"); 464 return ERROR_UNSUPPORTED; 465 } 466 } 467 468 // This is the first track of either audio or video. 469 // Go ahead to add the track. 470 Track *track = new Track(this, source, 1 + mTracks.size()); 471 mTracks.push_back(track); 472 473 return OK; 474 } 475 476 status_t MPEG4Writer::startTracks(MetaData *params) { 477 if (mTracks.empty()) { 478 ALOGE("No source added"); 479 return INVALID_OPERATION; 480 } 481 482 for (List<Track *>::iterator it = mTracks.begin(); 483 it != mTracks.end(); ++it) { 484 status_t err = (*it)->start(params); 485 486 if (err != OK) { 487 for (List<Track *>::iterator it2 = mTracks.begin(); 488 it2 != it; ++it2) { 489 (*it2)->stop(); 490 } 491 492 return err; 493 } 494 } 495 return OK; 496 } 497 498 int64_t MPEG4Writer::estimateMoovBoxSize(int32_t bitRate) { 499 // This implementation is highly experimental/heurisitic. 500 // 501 // Statistical analysis shows that metadata usually accounts 502 // for a small portion of the total file size, usually < 0.6%. 503 504 // The default MIN_MOOV_BOX_SIZE is set to 0.6% x 1MB / 2, 505 // where 1MB is the common file size limit for MMS application. 506 // The default MAX _MOOV_BOX_SIZE value is based on about 3 507 // minute video recording with a bit rate about 3 Mbps, because 508 // statistics also show that most of the video captured are going 509 // to be less than 3 minutes. 510 511 // If the estimation is wrong, we will pay the price of wasting 512 // some reserved space. This should not happen so often statistically. 513 static const int32_t factor = mUse32BitOffset? 1: 2; 514 static const int64_t MIN_MOOV_BOX_SIZE = 3 * 1024; // 3 KB 515 static const int64_t MAX_MOOV_BOX_SIZE = (180 * 3000000 * 6LL / 8000); 516 int64_t size = MIN_MOOV_BOX_SIZE; 517 518 // Max file size limit is set 519 if (mMaxFileSizeLimitBytes != 0 && mIsFileSizeLimitExplicitlyRequested) { 520 size = mMaxFileSizeLimitBytes * 6 / 1000; 521 } 522 523 // Max file duration limit is set 524 if (mMaxFileDurationLimitUs != 0) { 525 if (bitRate > 0) { 526 int64_t size2 = 527 ((mMaxFileDurationLimitUs * bitRate * 6) / 1000 / 8000000); 528 if (mMaxFileSizeLimitBytes != 0 && mIsFileSizeLimitExplicitlyRequested) { 529 // When both file size and duration limits are set, 530 // we use the smaller limit of the two. 531 if (size > size2) { 532 size = size2; 533 } 534 } else { 535 // Only max file duration limit is set 536 size = size2; 537 } 538 } 539 } 540 541 if (size < MIN_MOOV_BOX_SIZE) { 542 size = MIN_MOOV_BOX_SIZE; 543 } 544 545 // Any long duration recording will be probably end up with 546 // non-streamable mp4 file. 547 if (size > MAX_MOOV_BOX_SIZE) { 548 size = MAX_MOOV_BOX_SIZE; 549 } 550 551 ALOGI("limits: %lld/%lld bytes/us, bit rate: %d bps and the estimated" 552 " moov size %lld bytes", 553 mMaxFileSizeLimitBytes, mMaxFileDurationLimitUs, bitRate, size); 554 return factor * size; 555 } 556 557 status_t MPEG4Writer::start(MetaData *param) { 558 if (mInitCheck != OK) { 559 return UNKNOWN_ERROR; 560 } 561 562 /* 563 * Check mMaxFileSizeLimitBytes at the beginning 564 * since mMaxFileSizeLimitBytes may be implicitly 565 * changed later for 32-bit file offset even if 566 * user does not ask to set it explicitly. 567 */ 568 if (mMaxFileSizeLimitBytes != 0) { 569 mIsFileSizeLimitExplicitlyRequested = true; 570 } 571 572 int32_t use64BitOffset; 573 if (param && 574 param->findInt32(kKey64BitFileOffset, &use64BitOffset) && 575 use64BitOffset) { 576 mUse32BitOffset = false; 577 } 578 579 if (mUse32BitOffset) { 580 // Implicit 32 bit file size limit 581 if (mMaxFileSizeLimitBytes == 0) { 582 mMaxFileSizeLimitBytes = kMax32BitFileSize; 583 } 584 585 // If file size is set to be larger than the 32 bit file 586 // size limit, treat it as an error. 587 if (mMaxFileSizeLimitBytes > kMax32BitFileSize) { 588 ALOGW("32-bit file size limit (%lld bytes) too big. " 589 "It is changed to %lld bytes", 590 mMaxFileSizeLimitBytes, kMax32BitFileSize); 591 mMaxFileSizeLimitBytes = kMax32BitFileSize; 592 } 593 } 594 595 int32_t use2ByteNalLength; 596 if (param && 597 param->findInt32(kKey2ByteNalLength, &use2ByteNalLength) && 598 use2ByteNalLength) { 599 mUse4ByteNalLength = false; 600 } 601 602 int32_t isRealTimeRecording; 603 if (param && param->findInt32(kKeyRealTimeRecording, &isRealTimeRecording)) { 604 mIsRealTimeRecording = isRealTimeRecording; 605 } 606 607 mStartTimestampUs = -1; 608 609 if (mStarted) { 610 if (mPaused) { 611 mPaused = false; 612 return startTracks(param); 613 } 614 return OK; 615 } 616 617 if (!param || 618 !param->findInt32(kKeyTimeScale, &mTimeScale)) { 619 mTimeScale = 1000; 620 } 621 CHECK_GT(mTimeScale, 0); 622 ALOGV("movie time scale: %d", mTimeScale); 623 624 /* 625 * When the requested file size limit is small, the priority 626 * is to meet the file size limit requirement, rather than 627 * to make the file streamable. mStreamableFile does not tell 628 * whether the actual recorded file is streamable or not. 629 */ 630 mStreamableFile = 631 (mMaxFileSizeLimitBytes != 0 && 632 mMaxFileSizeLimitBytes >= kMinStreamableFileSizeInBytes); 633 634 /* 635 * mWriteMoovBoxToMemory is true if the amount of data in moov box is 636 * smaller than the reserved free space at the beginning of a file, AND 637 * when the content of moov box is constructed. Note that video/audio 638 * frame data is always written to the file but not in the memory. 639 * 640 * Before stop()/reset() is called, mWriteMoovBoxToMemory is always 641 * false. When reset() is called at the end of a recording session, 642 * Moov box needs to be constructed. 643 * 644 * 1) Right before a moov box is constructed, mWriteMoovBoxToMemory 645 * to set to mStreamableFile so that if 646 * the file is intended to be streamable, it is set to true; 647 * otherwise, it is set to false. When the value is set to false, 648 * all the content of the moov box is written immediately to 649 * the end of the file. When the value is set to true, all the 650 * content of the moov box is written to an in-memory cache, 651 * mMoovBoxBuffer, util the following condition happens. Note 652 * that the size of the in-memory cache is the same as the 653 * reserved free space at the beginning of the file. 654 * 655 * 2) While the data of the moov box is written to an in-memory 656 * cache, the data size is checked against the reserved space. 657 * If the data size surpasses the reserved space, subsequent moov 658 * data could no longer be hold in the in-memory cache. This also 659 * indicates that the reserved space was too small. At this point, 660 * _all_ moov data must be written to the end of the file. 661 * mWriteMoovBoxToMemory must be set to false to direct the write 662 * to the file. 663 * 664 * 3) If the data size in moov box is smaller than the reserved 665 * space after moov box is completely constructed, the in-memory 666 * cache copy of the moov box is written to the reserved free 667 * space. Thus, immediately after the moov is completedly 668 * constructed, mWriteMoovBoxToMemory is always set to false. 669 */ 670 mWriteMoovBoxToMemory = false; 671 mMoovBoxBuffer = NULL; 672 mMoovBoxBufferOffset = 0; 673 674 writeFtypBox(param); 675 676 mFreeBoxOffset = mOffset; 677 678 if (mEstimatedMoovBoxSize == 0) { 679 int32_t bitRate = -1; 680 if (param) { 681 param->findInt32(kKeyBitRate, &bitRate); 682 } 683 mEstimatedMoovBoxSize = estimateMoovBoxSize(bitRate); 684 } 685 CHECK_GE(mEstimatedMoovBoxSize, 8); 686 if (mStreamableFile) { 687 // Reserve a 'free' box only for streamable file 688 lseek64(mFd, mFreeBoxOffset, SEEK_SET); 689 writeInt32(mEstimatedMoovBoxSize); 690 write("free", 4); 691 mMdatOffset = mFreeBoxOffset + mEstimatedMoovBoxSize; 692 } else { 693 mMdatOffset = mOffset; 694 } 695 696 mOffset = mMdatOffset; 697 lseek64(mFd, mMdatOffset, SEEK_SET); 698 if (mUse32BitOffset) { 699 write("????mdat", 8); 700 } else { 701 write("\x00\x00\x00\x01mdat????????", 16); 702 } 703 704 status_t err = startWriterThread(); 705 if (err != OK) { 706 return err; 707 } 708 709 err = startTracks(param); 710 if (err != OK) { 711 return err; 712 } 713 714 mStarted = true; 715 return OK; 716 } 717 718 bool MPEG4Writer::use32BitFileOffset() const { 719 return mUse32BitOffset; 720 } 721 722 status_t MPEG4Writer::pause() { 723 if (mInitCheck != OK) { 724 return OK; 725 } 726 mPaused = true; 727 status_t err = OK; 728 for (List<Track *>::iterator it = mTracks.begin(); 729 it != mTracks.end(); ++it) { 730 status_t status = (*it)->pause(); 731 if (status != OK) { 732 err = status; 733 } 734 } 735 return err; 736 } 737 738 void MPEG4Writer::stopWriterThread() { 739 ALOGD("Stopping writer thread"); 740 if (!mWriterThreadStarted) { 741 return; 742 } 743 744 { 745 Mutex::Autolock autolock(mLock); 746 747 mDone = true; 748 mChunkReadyCondition.signal(); 749 } 750 751 void *dummy; 752 pthread_join(mThread, &dummy); 753 mWriterThreadStarted = false; 754 ALOGD("Writer thread stopped"); 755 } 756 757 /* 758 * MP4 file standard defines a composition matrix: 759 * | a b u | 760 * | c d v | 761 * | x y w | 762 * 763 * the element in the matrix is stored in the following 764 * order: {a, b, u, c, d, v, x, y, w}, 765 * where a, b, c, d, x, and y is in 16.16 format, while 766 * u, v and w is in 2.30 format. 767 */ 768 void MPEG4Writer::writeCompositionMatrix(int degrees) { 769 ALOGV("writeCompositionMatrix"); 770 uint32_t a = 0x00010000; 771 uint32_t b = 0; 772 uint32_t c = 0; 773 uint32_t d = 0x00010000; 774 switch (degrees) { 775 case 0: 776 break; 777 case 90: 778 a = 0; 779 b = 0x00010000; 780 c = 0xFFFF0000; 781 d = 0; 782 break; 783 case 180: 784 a = 0xFFFF0000; 785 d = 0xFFFF0000; 786 break; 787 case 270: 788 a = 0; 789 b = 0xFFFF0000; 790 c = 0x00010000; 791 d = 0; 792 break; 793 default: 794 CHECK(!"Should never reach this unknown rotation"); 795 break; 796 } 797 798 writeInt32(a); // a 799 writeInt32(b); // b 800 writeInt32(0); // u 801 writeInt32(c); // c 802 writeInt32(d); // d 803 writeInt32(0); // v 804 writeInt32(0); // x 805 writeInt32(0); // y 806 writeInt32(0x40000000); // w 807 } 808 809 void MPEG4Writer::release() { 810 close(mFd); 811 mFd = -1; 812 mInitCheck = NO_INIT; 813 mStarted = false; 814 } 815 816 status_t MPEG4Writer::reset() { 817 if (mInitCheck != OK) { 818 return OK; 819 } else { 820 if (!mWriterThreadStarted || 821 !mStarted) { 822 if (mWriterThreadStarted) { 823 stopWriterThread(); 824 } 825 release(); 826 return OK; 827 } 828 } 829 830 status_t err = OK; 831 int64_t maxDurationUs = 0; 832 int64_t minDurationUs = 0x7fffffffffffffffLL; 833 for (List<Track *>::iterator it = mTracks.begin(); 834 it != mTracks.end(); ++it) { 835 status_t status = (*it)->stop(); 836 if (err == OK && status != OK) { 837 err = status; 838 } 839 840 int64_t durationUs = (*it)->getDurationUs(); 841 if (durationUs > maxDurationUs) { 842 maxDurationUs = durationUs; 843 } 844 if (durationUs < minDurationUs) { 845 minDurationUs = durationUs; 846 } 847 } 848 849 if (mTracks.size() > 1) { 850 ALOGD("Duration from tracks range is [%lld, %lld] us", 851 minDurationUs, maxDurationUs); 852 } 853 854 stopWriterThread(); 855 856 // Do not write out movie header on error. 857 if (err != OK) { 858 release(); 859 return err; 860 } 861 862 // Fix up the size of the 'mdat' chunk. 863 if (mUse32BitOffset) { 864 lseek64(mFd, mMdatOffset, SEEK_SET); 865 uint32_t size = htonl(static_cast<uint32_t>(mOffset - mMdatOffset)); 866 ::write(mFd, &size, 4); 867 } else { 868 lseek64(mFd, mMdatOffset + 8, SEEK_SET); 869 uint64_t size = mOffset - mMdatOffset; 870 size = hton64(size); 871 ::write(mFd, &size, 8); 872 } 873 lseek64(mFd, mOffset, SEEK_SET); 874 875 // Construct moov box now 876 mMoovBoxBufferOffset = 0; 877 mWriteMoovBoxToMemory = mStreamableFile; 878 if (mWriteMoovBoxToMemory) { 879 // There is no need to allocate in-memory cache 880 // for moov box if the file is not streamable. 881 882 mMoovBoxBuffer = (uint8_t *) malloc(mEstimatedMoovBoxSize); 883 CHECK(mMoovBoxBuffer != NULL); 884 } 885 writeMoovBox(maxDurationUs); 886 887 // mWriteMoovBoxToMemory could be set to false in 888 // MPEG4Writer::write() method 889 if (mWriteMoovBoxToMemory) { 890 mWriteMoovBoxToMemory = false; 891 // Content of the moov box is saved in the cache, and the in-memory 892 // moov box needs to be written to the file in a single shot. 893 894 CHECK_LE(mMoovBoxBufferOffset + 8, mEstimatedMoovBoxSize); 895 896 // Moov box 897 lseek64(mFd, mFreeBoxOffset, SEEK_SET); 898 mOffset = mFreeBoxOffset; 899 write(mMoovBoxBuffer, 1, mMoovBoxBufferOffset); 900 901 // Free box 902 lseek64(mFd, mOffset, SEEK_SET); 903 writeInt32(mEstimatedMoovBoxSize - mMoovBoxBufferOffset); 904 write("free", 4); 905 } else { 906 ALOGI("The mp4 file will not be streamable."); 907 } 908 909 // Free in-memory cache for moov box 910 if (mMoovBoxBuffer != NULL) { 911 free(mMoovBoxBuffer); 912 mMoovBoxBuffer = NULL; 913 mMoovBoxBufferOffset = 0; 914 } 915 916 CHECK(mBoxes.empty()); 917 918 release(); 919 return err; 920 } 921 922 uint32_t MPEG4Writer::getMpeg4Time() { 923 time_t now = time(NULL); 924 // MP4 file uses time counting seconds since midnight, Jan. 1, 1904 925 // while time function returns Unix epoch values which starts 926 // at 1970-01-01. Lets add the number of seconds between them 927 uint32_t mpeg4Time = now + (66 * 365 + 17) * (24 * 60 * 60); 928 return mpeg4Time; 929 } 930 931 void MPEG4Writer::writeMvhdBox(int64_t durationUs) { 932 uint32_t now = getMpeg4Time(); 933 beginBox("mvhd"); 934 writeInt32(0); // version=0, flags=0 935 writeInt32(now); // creation time 936 writeInt32(now); // modification time 937 writeInt32(mTimeScale); // mvhd timescale 938 int32_t duration = (durationUs * mTimeScale + 5E5) / 1E6; 939 writeInt32(duration); 940 writeInt32(0x10000); // rate: 1.0 941 writeInt16(0x100); // volume 942 writeInt16(0); // reserved 943 writeInt32(0); // reserved 944 writeInt32(0); // reserved 945 writeCompositionMatrix(0); // matrix 946 writeInt32(0); // predefined 947 writeInt32(0); // predefined 948 writeInt32(0); // predefined 949 writeInt32(0); // predefined 950 writeInt32(0); // predefined 951 writeInt32(0); // predefined 952 writeInt32(mTracks.size() + 1); // nextTrackID 953 endBox(); // mvhd 954 } 955 956 void MPEG4Writer::writeMoovBox(int64_t durationUs) { 957 beginBox("moov"); 958 writeMvhdBox(durationUs); 959 if (mAreGeoTagsAvailable) { 960 writeUdtaBox(); 961 } 962 int32_t id = 1; 963 for (List<Track *>::iterator it = mTracks.begin(); 964 it != mTracks.end(); ++it, ++id) { 965 (*it)->writeTrackHeader(mUse32BitOffset); 966 } 967 endBox(); // moov 968 } 969 970 void MPEG4Writer::writeFtypBox(MetaData *param) { 971 beginBox("ftyp"); 972 973 int32_t fileType; 974 if (param && param->findInt32(kKeyFileType, &fileType) && 975 fileType != OUTPUT_FORMAT_MPEG_4) { 976 writeFourcc("3gp4"); 977 } else { 978 writeFourcc("isom"); 979 } 980 981 writeInt32(0); 982 writeFourcc("isom"); 983 writeFourcc("3gp4"); 984 endBox(); 985 } 986 987 static bool isTestModeEnabled() { 988 #if (PROPERTY_VALUE_MAX < 5) 989 #error "PROPERTY_VALUE_MAX must be at least 5" 990 #endif 991 992 // Test mode is enabled only if rw.media.record.test system 993 // property is enabled. 994 char value[PROPERTY_VALUE_MAX]; 995 if (property_get("rw.media.record.test", value, NULL) && 996 (!strcasecmp(value, "true") || !strcasecmp(value, "1"))) { 997 return true; 998 } 999 return false; 1000 } 1001 1002 void MPEG4Writer::sendSessionSummary() { 1003 // Send session summary only if test mode is enabled 1004 if (!isTestModeEnabled()) { 1005 return; 1006 } 1007 1008 for (List<ChunkInfo>::iterator it = mChunkInfos.begin(); 1009 it != mChunkInfos.end(); ++it) { 1010 int trackNum = it->mTrack->getTrackId() << 28; 1011 notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 1012 trackNum | MEDIA_RECORDER_TRACK_INTER_CHUNK_TIME_MS, 1013 it->mMaxInterChunkDurUs); 1014 } 1015 } 1016 1017 status_t MPEG4Writer::setInterleaveDuration(uint32_t durationUs) { 1018 mInterleaveDurationUs = durationUs; 1019 return OK; 1020 } 1021 1022 void MPEG4Writer::lock() { 1023 mLock.lock(); 1024 } 1025 1026 void MPEG4Writer::unlock() { 1027 mLock.unlock(); 1028 } 1029 1030 off64_t MPEG4Writer::addSample_l(MediaBuffer *buffer) { 1031 off64_t old_offset = mOffset; 1032 1033 ::write(mFd, 1034 (const uint8_t *)buffer->data() + buffer->range_offset(), 1035 buffer->range_length()); 1036 1037 mOffset += buffer->range_length(); 1038 1039 return old_offset; 1040 } 1041 1042 static void StripStartcode(MediaBuffer *buffer) { 1043 if (buffer->range_length() < 4) { 1044 return; 1045 } 1046 1047 const uint8_t *ptr = 1048 (const uint8_t *)buffer->data() + buffer->range_offset(); 1049 1050 if (!memcmp(ptr, "\x00\x00\x00\x01", 4)) { 1051 buffer->set_range( 1052 buffer->range_offset() + 4, buffer->range_length() - 4); 1053 } 1054 } 1055 1056 off64_t MPEG4Writer::addLengthPrefixedSample_l(MediaBuffer *buffer) { 1057 off64_t old_offset = mOffset; 1058 1059 size_t length = buffer->range_length(); 1060 1061 if (mUse4ByteNalLength) { 1062 uint8_t x = length >> 24; 1063 ::write(mFd, &x, 1); 1064 x = (length >> 16) & 0xff; 1065 ::write(mFd, &x, 1); 1066 x = (length >> 8) & 0xff; 1067 ::write(mFd, &x, 1); 1068 x = length & 0xff; 1069 ::write(mFd, &x, 1); 1070 1071 ::write(mFd, 1072 (const uint8_t *)buffer->data() + buffer->range_offset(), 1073 length); 1074 1075 mOffset += length + 4; 1076 } else { 1077 CHECK_LT(length, 65536); 1078 1079 uint8_t x = length >> 8; 1080 ::write(mFd, &x, 1); 1081 x = length & 0xff; 1082 ::write(mFd, &x, 1); 1083 ::write(mFd, (const uint8_t *)buffer->data() + buffer->range_offset(), length); 1084 mOffset += length + 2; 1085 } 1086 1087 return old_offset; 1088 } 1089 1090 size_t MPEG4Writer::write( 1091 const void *ptr, size_t size, size_t nmemb) { 1092 1093 const size_t bytes = size * nmemb; 1094 if (mWriteMoovBoxToMemory) { 1095 1096 off64_t moovBoxSize = 8 + mMoovBoxBufferOffset + bytes; 1097 if (moovBoxSize > mEstimatedMoovBoxSize) { 1098 // The reserved moov box at the beginning of the file 1099 // is not big enough. Moov box should be written to 1100 // the end of the file from now on, but not to the 1101 // in-memory cache. 1102 1103 // We write partial moov box that is in the memory to 1104 // the file first. 1105 for (List<off64_t>::iterator it = mBoxes.begin(); 1106 it != mBoxes.end(); ++it) { 1107 (*it) += mOffset; 1108 } 1109 lseek64(mFd, mOffset, SEEK_SET); 1110 ::write(mFd, mMoovBoxBuffer, mMoovBoxBufferOffset); 1111 ::write(mFd, ptr, bytes); 1112 mOffset += (bytes + mMoovBoxBufferOffset); 1113 1114 // All subsequent moov box content will be written 1115 // to the end of the file. 1116 mWriteMoovBoxToMemory = false; 1117 } else { 1118 memcpy(mMoovBoxBuffer + mMoovBoxBufferOffset, ptr, bytes); 1119 mMoovBoxBufferOffset += bytes; 1120 } 1121 } else { 1122 ::write(mFd, ptr, size * nmemb); 1123 mOffset += bytes; 1124 } 1125 return bytes; 1126 } 1127 1128 void MPEG4Writer::beginBox(const char *fourcc) { 1129 CHECK_EQ(strlen(fourcc), 4); 1130 1131 mBoxes.push_back(mWriteMoovBoxToMemory? 1132 mMoovBoxBufferOffset: mOffset); 1133 1134 writeInt32(0); 1135 writeFourcc(fourcc); 1136 } 1137 1138 void MPEG4Writer::endBox() { 1139 CHECK(!mBoxes.empty()); 1140 1141 off64_t offset = *--mBoxes.end(); 1142 mBoxes.erase(--mBoxes.end()); 1143 1144 if (mWriteMoovBoxToMemory) { 1145 int32_t x = htonl(mMoovBoxBufferOffset - offset); 1146 memcpy(mMoovBoxBuffer + offset, &x, 4); 1147 } else { 1148 lseek64(mFd, offset, SEEK_SET); 1149 writeInt32(mOffset - offset); 1150 mOffset -= 4; 1151 lseek64(mFd, mOffset, SEEK_SET); 1152 } 1153 } 1154 1155 void MPEG4Writer::writeInt8(int8_t x) { 1156 write(&x, 1, 1); 1157 } 1158 1159 void MPEG4Writer::writeInt16(int16_t x) { 1160 x = htons(x); 1161 write(&x, 1, 2); 1162 } 1163 1164 void MPEG4Writer::writeInt32(int32_t x) { 1165 x = htonl(x); 1166 write(&x, 1, 4); 1167 } 1168 1169 void MPEG4Writer::writeInt64(int64_t x) { 1170 x = hton64(x); 1171 write(&x, 1, 8); 1172 } 1173 1174 void MPEG4Writer::writeCString(const char *s) { 1175 size_t n = strlen(s); 1176 write(s, 1, n + 1); 1177 } 1178 1179 void MPEG4Writer::writeFourcc(const char *s) { 1180 CHECK_EQ(strlen(s), 4); 1181 write(s, 1, 4); 1182 } 1183 1184 1185 // Written in +/-DD.DDDD format 1186 void MPEG4Writer::writeLatitude(int degreex10000) { 1187 bool isNegative = (degreex10000 < 0); 1188 char sign = isNegative? '-': '+'; 1189 1190 // Handle the whole part 1191 char str[9]; 1192 int wholePart = degreex10000 / 10000; 1193 if (wholePart == 0) { 1194 snprintf(str, 5, "%c%.2d.", sign, wholePart); 1195 } else { 1196 snprintf(str, 5, "%+.2d.", wholePart); 1197 } 1198 1199 // Handle the fractional part 1200 int fractionalPart = degreex10000 - (wholePart * 10000); 1201 if (fractionalPart < 0) { 1202 fractionalPart = -fractionalPart; 1203 } 1204 snprintf(&str[4], 5, "%.4d", fractionalPart); 1205 1206 // Do not write the null terminator 1207 write(str, 1, 8); 1208 } 1209 1210 // Written in +/- DDD.DDDD format 1211 void MPEG4Writer::writeLongitude(int degreex10000) { 1212 bool isNegative = (degreex10000 < 0); 1213 char sign = isNegative? '-': '+'; 1214 1215 // Handle the whole part 1216 char str[10]; 1217 int wholePart = degreex10000 / 10000; 1218 if (wholePart == 0) { 1219 snprintf(str, 6, "%c%.3d.", sign, wholePart); 1220 } else { 1221 snprintf(str, 6, "%+.3d.", wholePart); 1222 } 1223 1224 // Handle the fractional part 1225 int fractionalPart = degreex10000 - (wholePart * 10000); 1226 if (fractionalPart < 0) { 1227 fractionalPart = -fractionalPart; 1228 } 1229 snprintf(&str[5], 5, "%.4d", fractionalPart); 1230 1231 // Do not write the null terminator 1232 write(str, 1, 9); 1233 } 1234 1235 /* 1236 * Geodata is stored according to ISO-6709 standard. 1237 * latitudex10000 is latitude in degrees times 10000, and 1238 * longitudex10000 is longitude in degrees times 10000. 1239 * The range for the latitude is in [-90, +90], and 1240 * The range for the longitude is in [-180, +180] 1241 */ 1242 status_t MPEG4Writer::setGeoData(int latitudex10000, int longitudex10000) { 1243 // Is latitude or longitude out of range? 1244 if (latitudex10000 < -900000 || latitudex10000 > 900000 || 1245 longitudex10000 < -1800000 || longitudex10000 > 1800000) { 1246 return BAD_VALUE; 1247 } 1248 1249 mLatitudex10000 = latitudex10000; 1250 mLongitudex10000 = longitudex10000; 1251 mAreGeoTagsAvailable = true; 1252 return OK; 1253 } 1254 1255 void MPEG4Writer::write(const void *data, size_t size) { 1256 write(data, 1, size); 1257 } 1258 1259 bool MPEG4Writer::isFileStreamable() const { 1260 return mStreamableFile; 1261 } 1262 1263 bool MPEG4Writer::exceedsFileSizeLimit() { 1264 // No limit 1265 if (mMaxFileSizeLimitBytes == 0) { 1266 return false; 1267 } 1268 1269 int64_t nTotalBytesEstimate = static_cast<int64_t>(mEstimatedMoovBoxSize); 1270 for (List<Track *>::iterator it = mTracks.begin(); 1271 it != mTracks.end(); ++it) { 1272 nTotalBytesEstimate += (*it)->getEstimatedTrackSizeBytes(); 1273 } 1274 1275 if (!mStreamableFile) { 1276 // Add 1024 bytes as error tolerance 1277 return nTotalBytesEstimate + 1024 >= mMaxFileSizeLimitBytes; 1278 } 1279 // Be conservative in the estimate: do not exceed 95% of 1280 // the target file limit. For small target file size limit, though, 1281 // this will not help. 1282 return (nTotalBytesEstimate >= (95 * mMaxFileSizeLimitBytes) / 100); 1283 } 1284 1285 bool MPEG4Writer::exceedsFileDurationLimit() { 1286 // No limit 1287 if (mMaxFileDurationLimitUs == 0) { 1288 return false; 1289 } 1290 1291 for (List<Track *>::iterator it = mTracks.begin(); 1292 it != mTracks.end(); ++it) { 1293 if ((*it)->getDurationUs() >= mMaxFileDurationLimitUs) { 1294 return true; 1295 } 1296 } 1297 return false; 1298 } 1299 1300 bool MPEG4Writer::reachedEOS() { 1301 bool allDone = true; 1302 for (List<Track *>::iterator it = mTracks.begin(); 1303 it != mTracks.end(); ++it) { 1304 if (!(*it)->reachedEOS()) { 1305 allDone = false; 1306 break; 1307 } 1308 } 1309 1310 return allDone; 1311 } 1312 1313 void MPEG4Writer::setStartTimestampUs(int64_t timeUs) { 1314 ALOGI("setStartTimestampUs: %lld", timeUs); 1315 CHECK_GE(timeUs, 0ll); 1316 Mutex::Autolock autoLock(mLock); 1317 if (mStartTimestampUs < 0 || mStartTimestampUs > timeUs) { 1318 mStartTimestampUs = timeUs; 1319 ALOGI("Earliest track starting time: %lld", mStartTimestampUs); 1320 } 1321 } 1322 1323 int64_t MPEG4Writer::getStartTimestampUs() { 1324 Mutex::Autolock autoLock(mLock); 1325 return mStartTimestampUs; 1326 } 1327 1328 size_t MPEG4Writer::numTracks() { 1329 Mutex::Autolock autolock(mLock); 1330 return mTracks.size(); 1331 } 1332 1333 //////////////////////////////////////////////////////////////////////////////// 1334 1335 MPEG4Writer::Track::Track( 1336 MPEG4Writer *owner, const sp<MediaSource> &source, size_t trackId) 1337 : mOwner(owner), 1338 mMeta(source->getFormat()), 1339 mSource(source), 1340 mDone(false), 1341 mPaused(false), 1342 mResumed(false), 1343 mStarted(false), 1344 mTrackId(trackId), 1345 mTrackDurationUs(0), 1346 mEstimatedTrackSizeBytes(0), 1347 mSamplesHaveSameSize(true), 1348 mStszTableEntries(new ListTableEntries<uint32_t>(1000, 1)), 1349 mStcoTableEntries(new ListTableEntries<uint32_t>(1000, 1)), 1350 mCo64TableEntries(new ListTableEntries<off64_t>(1000, 1)), 1351 mStscTableEntries(new ListTableEntries<uint32_t>(1000, 3)), 1352 mStssTableEntries(new ListTableEntries<uint32_t>(1000, 1)), 1353 mSttsTableEntries(new ListTableEntries<uint32_t>(1000, 2)), 1354 mCttsTableEntries(new ListTableEntries<uint32_t>(1000, 2)), 1355 mCodecSpecificData(NULL), 1356 mCodecSpecificDataSize(0), 1357 mGotAllCodecSpecificData(false), 1358 mReachedEOS(false), 1359 mRotation(0) { 1360 getCodecSpecificDataFromInputFormatIfPossible(); 1361 1362 const char *mime; 1363 mMeta->findCString(kKeyMIMEType, &mime); 1364 mIsAvc = !strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_AVC); 1365 mIsAudio = !strncasecmp(mime, "audio/", 6); 1366 mIsMPEG4 = !strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_MPEG4) || 1367 !strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_AAC); 1368 1369 setTimeScale(); 1370 } 1371 1372 void MPEG4Writer::Track::updateTrackSizeEstimate() { 1373 1374 uint32_t stcoBoxCount = (mOwner->use32BitFileOffset() 1375 ? mStcoTableEntries->count() 1376 : mCo64TableEntries->count()); 1377 int64_t stcoBoxSizeBytes = stcoBoxCount * 4; 1378 int64_t stszBoxSizeBytes = mSamplesHaveSameSize? 4: (mStszTableEntries->count() * 4); 1379 1380 mEstimatedTrackSizeBytes = mMdatSizeBytes; // media data size 1381 if (!mOwner->isFileStreamable()) { 1382 // Reserved free space is not large enough to hold 1383 // all meta data and thus wasted. 1384 mEstimatedTrackSizeBytes += mStscTableEntries->count() * 12 + // stsc box size 1385 mStssTableEntries->count() * 4 + // stss box size 1386 mSttsTableEntries->count() * 8 + // stts box size 1387 mCttsTableEntries->count() * 8 + // ctts box size 1388 stcoBoxSizeBytes + // stco box size 1389 stszBoxSizeBytes; // stsz box size 1390 } 1391 } 1392 1393 void MPEG4Writer::Track::addOneStscTableEntry( 1394 size_t chunkId, size_t sampleId) { 1395 1396 mStscTableEntries->add(htonl(chunkId)); 1397 mStscTableEntries->add(htonl(sampleId)); 1398 mStscTableEntries->add(htonl(1)); 1399 } 1400 1401 void MPEG4Writer::Track::addOneStssTableEntry(size_t sampleId) { 1402 mStssTableEntries->add(htonl(sampleId)); 1403 } 1404 1405 void MPEG4Writer::Track::addOneSttsTableEntry( 1406 size_t sampleCount, int32_t duration) { 1407 1408 if (duration == 0) { 1409 ALOGW("0-duration samples found: %d", sampleCount); 1410 } 1411 mSttsTableEntries->add(htonl(sampleCount)); 1412 mSttsTableEntries->add(htonl(duration)); 1413 } 1414 1415 void MPEG4Writer::Track::addOneCttsTableEntry( 1416 size_t sampleCount, int32_t duration) { 1417 1418 if (mIsAudio) { 1419 return; 1420 } 1421 mCttsTableEntries->add(htonl(sampleCount)); 1422 mCttsTableEntries->add(htonl(duration)); 1423 } 1424 1425 void MPEG4Writer::Track::addChunkOffset(off64_t offset) { 1426 if (mOwner->use32BitFileOffset()) { 1427 uint32_t value = offset; 1428 mStcoTableEntries->add(htonl(value)); 1429 } else { 1430 mCo64TableEntries->add(hton64(offset)); 1431 } 1432 } 1433 1434 void MPEG4Writer::Track::setTimeScale() { 1435 ALOGV("setTimeScale"); 1436 // Default time scale 1437 mTimeScale = 90000; 1438 1439 if (mIsAudio) { 1440 // Use the sampling rate as the default time scale for audio track. 1441 int32_t sampleRate; 1442 bool success = mMeta->findInt32(kKeySampleRate, &sampleRate); 1443 CHECK(success); 1444 mTimeScale = sampleRate; 1445 } 1446 1447 // If someone would like to overwrite the timescale, use user-supplied value. 1448 int32_t timeScale; 1449 if (mMeta->findInt32(kKeyTimeScale, &timeScale)) { 1450 mTimeScale = timeScale; 1451 } 1452 1453 CHECK_GT(mTimeScale, 0); 1454 } 1455 1456 void MPEG4Writer::Track::getCodecSpecificDataFromInputFormatIfPossible() { 1457 const char *mime; 1458 CHECK(mMeta->findCString(kKeyMIMEType, &mime)); 1459 1460 if (!strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_AVC)) { 1461 uint32_t type; 1462 const void *data; 1463 size_t size; 1464 if (mMeta->findData(kKeyAVCC, &type, &data, &size)) { 1465 mCodecSpecificData = malloc(size); 1466 mCodecSpecificDataSize = size; 1467 memcpy(mCodecSpecificData, data, size); 1468 mGotAllCodecSpecificData = true; 1469 } 1470 } else if (!strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_MPEG4) 1471 || !strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_AAC)) { 1472 uint32_t type; 1473 const void *data; 1474 size_t size; 1475 if (mMeta->findData(kKeyESDS, &type, &data, &size)) { 1476 ESDS esds(data, size); 1477 if (esds.getCodecSpecificInfo(&data, &size) == OK) { 1478 mCodecSpecificData = malloc(size); 1479 mCodecSpecificDataSize = size; 1480 memcpy(mCodecSpecificData, data, size); 1481 mGotAllCodecSpecificData = true; 1482 } 1483 } 1484 } 1485 } 1486 1487 MPEG4Writer::Track::~Track() { 1488 stop(); 1489 1490 delete mStszTableEntries; 1491 delete mStcoTableEntries; 1492 delete mCo64TableEntries; 1493 delete mStscTableEntries; 1494 delete mSttsTableEntries; 1495 delete mStssTableEntries; 1496 delete mCttsTableEntries; 1497 1498 mStszTableEntries = NULL; 1499 mStcoTableEntries = NULL; 1500 mCo64TableEntries = NULL; 1501 mStscTableEntries = NULL; 1502 mSttsTableEntries = NULL; 1503 mStssTableEntries = NULL; 1504 mCttsTableEntries = NULL; 1505 1506 if (mCodecSpecificData != NULL) { 1507 free(mCodecSpecificData); 1508 mCodecSpecificData = NULL; 1509 } 1510 } 1511 1512 void MPEG4Writer::Track::initTrackingProgressStatus(MetaData *params) { 1513 ALOGV("initTrackingProgressStatus"); 1514 mPreviousTrackTimeUs = -1; 1515 mTrackingProgressStatus = false; 1516 mTrackEveryTimeDurationUs = 0; 1517 { 1518 int64_t timeUs; 1519 if (params && params->findInt64(kKeyTrackTimeStatus, &timeUs)) { 1520 ALOGV("Receive request to track progress status for every %lld us", timeUs); 1521 mTrackEveryTimeDurationUs = timeUs; 1522 mTrackingProgressStatus = true; 1523 } 1524 } 1525 } 1526 1527 // static 1528 void *MPEG4Writer::ThreadWrapper(void *me) { 1529 ALOGV("ThreadWrapper: %p", me); 1530 MPEG4Writer *writer = static_cast<MPEG4Writer *>(me); 1531 writer->threadFunc(); 1532 return NULL; 1533 } 1534 1535 void MPEG4Writer::bufferChunk(const Chunk& chunk) { 1536 ALOGV("bufferChunk: %p", chunk.mTrack); 1537 Mutex::Autolock autolock(mLock); 1538 CHECK_EQ(mDone, false); 1539 1540 for (List<ChunkInfo>::iterator it = mChunkInfos.begin(); 1541 it != mChunkInfos.end(); ++it) { 1542 1543 if (chunk.mTrack == it->mTrack) { // Found owner 1544 it->mChunks.push_back(chunk); 1545 mChunkReadyCondition.signal(); 1546 return; 1547 } 1548 } 1549 1550 CHECK(!"Received a chunk for a unknown track"); 1551 } 1552 1553 void MPEG4Writer::writeChunkToFile(Chunk* chunk) { 1554 ALOGV("writeChunkToFile: %lld from %s track", 1555 chunk->mTimeStampUs, chunk->mTrack->isAudio()? "audio": "video"); 1556 1557 int32_t isFirstSample = true; 1558 while (!chunk->mSamples.empty()) { 1559 List<MediaBuffer *>::iterator it = chunk->mSamples.begin(); 1560 1561 off64_t offset = chunk->mTrack->isAvc() 1562 ? addLengthPrefixedSample_l(*it) 1563 : addSample_l(*it); 1564 1565 if (isFirstSample) { 1566 chunk->mTrack->addChunkOffset(offset); 1567 isFirstSample = false; 1568 } 1569 1570 (*it)->release(); 1571 (*it) = NULL; 1572 chunk->mSamples.erase(it); 1573 } 1574 chunk->mSamples.clear(); 1575 } 1576 1577 void MPEG4Writer::writeAllChunks() { 1578 ALOGV("writeAllChunks"); 1579 size_t outstandingChunks = 0; 1580 Chunk chunk; 1581 while (findChunkToWrite(&chunk)) { 1582 writeChunkToFile(&chunk); 1583 ++outstandingChunks; 1584 } 1585 1586 sendSessionSummary(); 1587 1588 mChunkInfos.clear(); 1589 ALOGD("%d chunks are written in the last batch", outstandingChunks); 1590 } 1591 1592 bool MPEG4Writer::findChunkToWrite(Chunk *chunk) { 1593 ALOGV("findChunkToWrite"); 1594 1595 int64_t minTimestampUs = 0x7FFFFFFFFFFFFFFFLL; 1596 Track *track = NULL; 1597 for (List<ChunkInfo>::iterator it = mChunkInfos.begin(); 1598 it != mChunkInfos.end(); ++it) { 1599 if (!it->mChunks.empty()) { 1600 List<Chunk>::iterator chunkIt = it->mChunks.begin(); 1601 if (chunkIt->mTimeStampUs < minTimestampUs) { 1602 minTimestampUs = chunkIt->mTimeStampUs; 1603 track = it->mTrack; 1604 } 1605 } 1606 } 1607 1608 if (track == NULL) { 1609 ALOGV("Nothing to be written after all"); 1610 return false; 1611 } 1612 1613 if (mIsFirstChunk) { 1614 mIsFirstChunk = false; 1615 } 1616 1617 for (List<ChunkInfo>::iterator it = mChunkInfos.begin(); 1618 it != mChunkInfos.end(); ++it) { 1619 if (it->mTrack == track) { 1620 *chunk = *(it->mChunks.begin()); 1621 it->mChunks.erase(it->mChunks.begin()); 1622 CHECK_EQ(chunk->mTrack, track); 1623 1624 int64_t interChunkTimeUs = 1625 chunk->mTimeStampUs - it->mPrevChunkTimestampUs; 1626 if (interChunkTimeUs > it->mPrevChunkTimestampUs) { 1627 it->mMaxInterChunkDurUs = interChunkTimeUs; 1628 } 1629 1630 return true; 1631 } 1632 } 1633 1634 return false; 1635 } 1636 1637 void MPEG4Writer::threadFunc() { 1638 ALOGV("threadFunc"); 1639 1640 prctl(PR_SET_NAME, (unsigned long)"MPEG4Writer", 0, 0, 0); 1641 1642 Mutex::Autolock autoLock(mLock); 1643 while (!mDone) { 1644 Chunk chunk; 1645 bool chunkFound = false; 1646 1647 while (!mDone && !(chunkFound = findChunkToWrite(&chunk))) { 1648 mChunkReadyCondition.wait(mLock); 1649 } 1650 1651 // In real time recording mode, write without holding the lock in order 1652 // to reduce the blocking time for media track threads. 1653 // Otherwise, hold the lock until the existing chunks get written to the 1654 // file. 1655 if (chunkFound) { 1656 if (mIsRealTimeRecording) { 1657 mLock.unlock(); 1658 } 1659 writeChunkToFile(&chunk); 1660 if (mIsRealTimeRecording) { 1661 mLock.lock(); 1662 } 1663 } 1664 } 1665 1666 writeAllChunks(); 1667 } 1668 1669 status_t MPEG4Writer::startWriterThread() { 1670 ALOGV("startWriterThread"); 1671 1672 mDone = false; 1673 mIsFirstChunk = true; 1674 mDriftTimeUs = 0; 1675 for (List<Track *>::iterator it = mTracks.begin(); 1676 it != mTracks.end(); ++it) { 1677 ChunkInfo info; 1678 info.mTrack = *it; 1679 info.mPrevChunkTimestampUs = 0; 1680 info.mMaxInterChunkDurUs = 0; 1681 mChunkInfos.push_back(info); 1682 } 1683 1684 pthread_attr_t attr; 1685 pthread_attr_init(&attr); 1686 pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE); 1687 pthread_create(&mThread, &attr, ThreadWrapper, this); 1688 pthread_attr_destroy(&attr); 1689 mWriterThreadStarted = true; 1690 return OK; 1691 } 1692 1693 1694 status_t MPEG4Writer::Track::start(MetaData *params) { 1695 if (!mDone && mPaused) { 1696 mPaused = false; 1697 mResumed = true; 1698 return OK; 1699 } 1700 1701 int64_t startTimeUs; 1702 if (params == NULL || !params->findInt64(kKeyTime, &startTimeUs)) { 1703 startTimeUs = 0; 1704 } 1705 mStartTimeRealUs = startTimeUs; 1706 1707 int32_t rotationDegrees; 1708 if (!mIsAudio && params && params->findInt32(kKeyRotation, &rotationDegrees)) { 1709 mRotation = rotationDegrees; 1710 } 1711 1712 initTrackingProgressStatus(params); 1713 1714 sp<MetaData> meta = new MetaData; 1715 if (mOwner->isRealTimeRecording() && mOwner->numTracks() > 1) { 1716 /* 1717 * This extra delay of accepting incoming audio/video signals 1718 * helps to align a/v start time at the beginning of a recording 1719 * session, and it also helps eliminate the "recording" sound for 1720 * camcorder applications. 1721 * 1722 * If client does not set the start time offset, we fall back to 1723 * use the default initial delay value. 1724 */ 1725 int64_t startTimeOffsetUs = mOwner->getStartTimeOffsetMs() * 1000LL; 1726 if (startTimeOffsetUs < 0) { // Start time offset was not set 1727 startTimeOffsetUs = kInitialDelayTimeUs; 1728 } 1729 startTimeUs += startTimeOffsetUs; 1730 ALOGI("Start time offset: %lld us", startTimeOffsetUs); 1731 } 1732 1733 meta->setInt64(kKeyTime, startTimeUs); 1734 1735 status_t err = mSource->start(meta.get()); 1736 if (err != OK) { 1737 mDone = mReachedEOS = true; 1738 return err; 1739 } 1740 1741 pthread_attr_t attr; 1742 pthread_attr_init(&attr); 1743 pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE); 1744 1745 mDone = false; 1746 mStarted = true; 1747 mTrackDurationUs = 0; 1748 mReachedEOS = false; 1749 mEstimatedTrackSizeBytes = 0; 1750 mMdatSizeBytes = 0; 1751 mMaxChunkDurationUs = 0; 1752 1753 pthread_create(&mThread, &attr, ThreadWrapper, this); 1754 pthread_attr_destroy(&attr); 1755 1756 return OK; 1757 } 1758 1759 status_t MPEG4Writer::Track::pause() { 1760 mPaused = true; 1761 return OK; 1762 } 1763 1764 status_t MPEG4Writer::Track::stop() { 1765 ALOGD("Stopping %s track", mIsAudio? "Audio": "Video"); 1766 if (!mStarted) { 1767 ALOGE("Stop() called but track is not started"); 1768 return ERROR_END_OF_STREAM; 1769 } 1770 1771 if (mDone) { 1772 return OK; 1773 } 1774 mDone = true; 1775 1776 void *dummy; 1777 pthread_join(mThread, &dummy); 1778 1779 status_t err = (status_t) dummy; 1780 1781 ALOGD("Stopping %s track source", mIsAudio? "Audio": "Video"); 1782 { 1783 status_t status = mSource->stop(); 1784 if (err == OK && status != OK && status != ERROR_END_OF_STREAM) { 1785 err = status; 1786 } 1787 } 1788 1789 ALOGD("%s track stopped", mIsAudio? "Audio": "Video"); 1790 return err; 1791 } 1792 1793 bool MPEG4Writer::Track::reachedEOS() { 1794 return mReachedEOS; 1795 } 1796 1797 // static 1798 void *MPEG4Writer::Track::ThreadWrapper(void *me) { 1799 Track *track = static_cast<Track *>(me); 1800 1801 status_t err = track->threadEntry(); 1802 return (void *) err; 1803 } 1804 1805 static void getNalUnitType(uint8_t byte, uint8_t* type) { 1806 ALOGV("getNalUnitType: %d", byte); 1807 1808 // nal_unit_type: 5-bit unsigned integer 1809 *type = (byte & 0x1F); 1810 } 1811 1812 static const uint8_t *findNextStartCode( 1813 const uint8_t *data, size_t length) { 1814 1815 ALOGV("findNextStartCode: %p %d", data, length); 1816 1817 size_t bytesLeft = length; 1818 while (bytesLeft > 4 && 1819 memcmp("\x00\x00\x00\x01", &data[length - bytesLeft], 4)) { 1820 --bytesLeft; 1821 } 1822 if (bytesLeft <= 4) { 1823 bytesLeft = 0; // Last parameter set 1824 } 1825 return &data[length - bytesLeft]; 1826 } 1827 1828 const uint8_t *MPEG4Writer::Track::parseParamSet( 1829 const uint8_t *data, size_t length, int type, size_t *paramSetLen) { 1830 1831 ALOGV("parseParamSet"); 1832 CHECK(type == kNalUnitTypeSeqParamSet || 1833 type == kNalUnitTypePicParamSet); 1834 1835 const uint8_t *nextStartCode = findNextStartCode(data, length); 1836 *paramSetLen = nextStartCode - data; 1837 if (*paramSetLen == 0) { 1838 ALOGE("Param set is malformed, since its length is 0"); 1839 return NULL; 1840 } 1841 1842 AVCParamSet paramSet(*paramSetLen, data); 1843 if (type == kNalUnitTypeSeqParamSet) { 1844 if (*paramSetLen < 4) { 1845 ALOGE("Seq parameter set malformed"); 1846 return NULL; 1847 } 1848 if (mSeqParamSets.empty()) { 1849 mProfileIdc = data[1]; 1850 mProfileCompatible = data[2]; 1851 mLevelIdc = data[3]; 1852 } else { 1853 if (mProfileIdc != data[1] || 1854 mProfileCompatible != data[2] || 1855 mLevelIdc != data[3]) { 1856 ALOGE("Inconsistent profile/level found in seq parameter sets"); 1857 return NULL; 1858 } 1859 } 1860 mSeqParamSets.push_back(paramSet); 1861 } else { 1862 mPicParamSets.push_back(paramSet); 1863 } 1864 return nextStartCode; 1865 } 1866 1867 status_t MPEG4Writer::Track::copyAVCCodecSpecificData( 1868 const uint8_t *data, size_t size) { 1869 ALOGV("copyAVCCodecSpecificData"); 1870 1871 // 2 bytes for each of the parameter set length field 1872 // plus the 7 bytes for the header 1873 if (size < 4 + 7) { 1874 ALOGE("Codec specific data length too short: %d", size); 1875 return ERROR_MALFORMED; 1876 } 1877 1878 mCodecSpecificDataSize = size; 1879 mCodecSpecificData = malloc(size); 1880 memcpy(mCodecSpecificData, data, size); 1881 return OK; 1882 } 1883 1884 status_t MPEG4Writer::Track::parseAVCCodecSpecificData( 1885 const uint8_t *data, size_t size) { 1886 1887 ALOGV("parseAVCCodecSpecificData"); 1888 // Data starts with a start code. 1889 // SPS and PPS are separated with start codes. 1890 // Also, SPS must come before PPS 1891 uint8_t type = kNalUnitTypeSeqParamSet; 1892 bool gotSps = false; 1893 bool gotPps = false; 1894 const uint8_t *tmp = data; 1895 const uint8_t *nextStartCode = data; 1896 size_t bytesLeft = size; 1897 size_t paramSetLen = 0; 1898 mCodecSpecificDataSize = 0; 1899 while (bytesLeft > 4 && !memcmp("\x00\x00\x00\x01", tmp, 4)) { 1900 getNalUnitType(*(tmp + 4), &type); 1901 if (type == kNalUnitTypeSeqParamSet) { 1902 if (gotPps) { 1903 ALOGE("SPS must come before PPS"); 1904 return ERROR_MALFORMED; 1905 } 1906 if (!gotSps) { 1907 gotSps = true; 1908 } 1909 nextStartCode = parseParamSet(tmp + 4, bytesLeft - 4, type, ¶mSetLen); 1910 } else if (type == kNalUnitTypePicParamSet) { 1911 if (!gotSps) { 1912 ALOGE("SPS must come before PPS"); 1913 return ERROR_MALFORMED; 1914 } 1915 if (!gotPps) { 1916 gotPps = true; 1917 } 1918 nextStartCode = parseParamSet(tmp + 4, bytesLeft - 4, type, ¶mSetLen); 1919 } else { 1920 ALOGE("Only SPS and PPS Nal units are expected"); 1921 return ERROR_MALFORMED; 1922 } 1923 1924 if (nextStartCode == NULL) { 1925 return ERROR_MALFORMED; 1926 } 1927 1928 // Move on to find the next parameter set 1929 bytesLeft -= nextStartCode - tmp; 1930 tmp = nextStartCode; 1931 mCodecSpecificDataSize += (2 + paramSetLen); 1932 } 1933 1934 { 1935 // Check on the number of seq parameter sets 1936 size_t nSeqParamSets = mSeqParamSets.size(); 1937 if (nSeqParamSets == 0) { 1938 ALOGE("Cound not find sequence parameter set"); 1939 return ERROR_MALFORMED; 1940 } 1941 1942 if (nSeqParamSets > 0x1F) { 1943 ALOGE("Too many seq parameter sets (%d) found", nSeqParamSets); 1944 return ERROR_MALFORMED; 1945 } 1946 } 1947 1948 { 1949 // Check on the number of pic parameter sets 1950 size_t nPicParamSets = mPicParamSets.size(); 1951 if (nPicParamSets == 0) { 1952 ALOGE("Cound not find picture parameter set"); 1953 return ERROR_MALFORMED; 1954 } 1955 if (nPicParamSets > 0xFF) { 1956 ALOGE("Too many pic parameter sets (%d) found", nPicParamSets); 1957 return ERROR_MALFORMED; 1958 } 1959 } 1960 // FIXME: 1961 // Add chromat_format_idc, bit depth values, etc for AVC/h264 high profile and above 1962 // and remove #if 0 1963 #if 0 1964 { 1965 // Check on the profiles 1966 // These profiles requires additional parameter set extensions 1967 if (mProfileIdc == 100 || mProfileIdc == 110 || 1968 mProfileIdc == 122 || mProfileIdc == 144) { 1969 ALOGE("Sorry, no support for profile_idc: %d!", mProfileIdc); 1970 return BAD_VALUE; 1971 } 1972 } 1973 #endif 1974 return OK; 1975 } 1976 1977 status_t MPEG4Writer::Track::makeAVCCodecSpecificData( 1978 const uint8_t *data, size_t size) { 1979 1980 if (mCodecSpecificData != NULL) { 1981 ALOGE("Already have codec specific data"); 1982 return ERROR_MALFORMED; 1983 } 1984 1985 if (size < 4) { 1986 ALOGE("Codec specific data length too short: %d", size); 1987 return ERROR_MALFORMED; 1988 } 1989 1990 // Data is in the form of AVCCodecSpecificData 1991 if (memcmp("\x00\x00\x00\x01", data, 4)) { 1992 return copyAVCCodecSpecificData(data, size); 1993 } 1994 1995 if (parseAVCCodecSpecificData(data, size) != OK) { 1996 return ERROR_MALFORMED; 1997 } 1998 1999 // ISO 14496-15: AVC file format 2000 mCodecSpecificDataSize += 7; // 7 more bytes in the header 2001 mCodecSpecificData = malloc(mCodecSpecificDataSize); 2002 uint8_t *header = (uint8_t *)mCodecSpecificData; 2003 header[0] = 1; // version 2004 header[1] = mProfileIdc; // profile indication 2005 header[2] = mProfileCompatible; // profile compatibility 2006 header[3] = mLevelIdc; 2007 2008 // 6-bit '111111' followed by 2-bit to lengthSizeMinuusOne 2009 if (mOwner->useNalLengthFour()) { 2010 header[4] = 0xfc | 3; // length size == 4 bytes 2011 } else { 2012 header[4] = 0xfc | 1; // length size == 2 bytes 2013 } 2014 2015 // 3-bit '111' followed by 5-bit numSequenceParameterSets 2016 int nSequenceParamSets = mSeqParamSets.size(); 2017 header[5] = 0xe0 | nSequenceParamSets; 2018 header += 6; 2019 for (List<AVCParamSet>::iterator it = mSeqParamSets.begin(); 2020 it != mSeqParamSets.end(); ++it) { 2021 // 16-bit sequence parameter set length 2022 uint16_t seqParamSetLength = it->mLength; 2023 header[0] = seqParamSetLength >> 8; 2024 header[1] = seqParamSetLength & 0xff; 2025 2026 // SPS NAL unit (sequence parameter length bytes) 2027 memcpy(&header[2], it->mData, seqParamSetLength); 2028 header += (2 + seqParamSetLength); 2029 } 2030 2031 // 8-bit nPictureParameterSets 2032 int nPictureParamSets = mPicParamSets.size(); 2033 header[0] = nPictureParamSets; 2034 header += 1; 2035 for (List<AVCParamSet>::iterator it = mPicParamSets.begin(); 2036 it != mPicParamSets.end(); ++it) { 2037 // 16-bit picture parameter set length 2038 uint16_t picParamSetLength = it->mLength; 2039 header[0] = picParamSetLength >> 8; 2040 header[1] = picParamSetLength & 0xff; 2041 2042 // PPS Nal unit (picture parameter set length bytes) 2043 memcpy(&header[2], it->mData, picParamSetLength); 2044 header += (2 + picParamSetLength); 2045 } 2046 2047 return OK; 2048 } 2049 2050 /* 2051 * Updates the drift time from the audio track so that 2052 * the video track can get the updated drift time information 2053 * from the file writer. The fluctuation of the drift time of the audio 2054 * encoding path is smoothed out with a simple filter by giving a larger 2055 * weight to more recently drift time. The filter coefficients, 0.5 and 0.5, 2056 * are heuristically determined. 2057 */ 2058 void MPEG4Writer::Track::updateDriftTime(const sp<MetaData>& meta) { 2059 int64_t driftTimeUs = 0; 2060 if (meta->findInt64(kKeyDriftTime, &driftTimeUs)) { 2061 int64_t prevDriftTimeUs = mOwner->getDriftTimeUs(); 2062 int64_t timeUs = (driftTimeUs + prevDriftTimeUs) >> 1; 2063 mOwner->setDriftTimeUs(timeUs); 2064 } 2065 } 2066 2067 status_t MPEG4Writer::Track::threadEntry() { 2068 int32_t count = 0; 2069 const int64_t interleaveDurationUs = mOwner->interleaveDuration(); 2070 const bool hasMultipleTracks = (mOwner->numTracks() > 1); 2071 int64_t chunkTimestampUs = 0; 2072 int32_t nChunks = 0; 2073 int32_t nZeroLengthFrames = 0; 2074 int64_t lastTimestampUs = 0; // Previous sample time stamp 2075 int64_t lastDurationUs = 0; // Between the previous two samples 2076 int64_t currDurationTicks = 0; // Timescale based ticks 2077 int64_t lastDurationTicks = 0; // Timescale based ticks 2078 int32_t sampleCount = 1; // Sample count in the current stts table entry 2079 uint32_t previousSampleSize = 0; // Size of the previous sample 2080 int64_t previousPausedDurationUs = 0; 2081 int64_t timestampUs = 0; 2082 int64_t cttsOffsetTimeUs = 0; 2083 int64_t currCttsOffsetTimeTicks = 0; // Timescale based ticks 2084 int64_t lastCttsOffsetTimeTicks = -1; // Timescale based ticks 2085 int32_t cttsSampleCount = 0; // Sample count in the current ctts table entry 2086 uint32_t lastSamplesPerChunk = 0; 2087 2088 if (mIsAudio) { 2089 prctl(PR_SET_NAME, (unsigned long)"AudioTrackEncoding", 0, 0, 0); 2090 } else { 2091 prctl(PR_SET_NAME, (unsigned long)"VideoTrackEncoding", 0, 0, 0); 2092 } 2093 2094 if (mOwner->isRealTimeRecording()) { 2095 androidSetThreadPriority(0, ANDROID_PRIORITY_AUDIO); 2096 } 2097 2098 sp<MetaData> meta_data; 2099 2100 status_t err = OK; 2101 MediaBuffer *buffer; 2102 while (!mDone && (err = mSource->read(&buffer)) == OK) { 2103 if (buffer->range_length() == 0) { 2104 buffer->release(); 2105 buffer = NULL; 2106 ++nZeroLengthFrames; 2107 continue; 2108 } 2109 2110 // If the codec specific data has not been received yet, delay pause. 2111 // After the codec specific data is received, discard what we received 2112 // when the track is to be paused. 2113 if (mPaused && !mResumed) { 2114 buffer->release(); 2115 buffer = NULL; 2116 continue; 2117 } 2118 2119 ++count; 2120 2121 int32_t isCodecConfig; 2122 if (buffer->meta_data()->findInt32(kKeyIsCodecConfig, &isCodecConfig) 2123 && isCodecConfig) { 2124 CHECK(!mGotAllCodecSpecificData); 2125 2126 if (mIsAvc) { 2127 status_t err = makeAVCCodecSpecificData( 2128 (const uint8_t *)buffer->data() 2129 + buffer->range_offset(), 2130 buffer->range_length()); 2131 CHECK_EQ((status_t)OK, err); 2132 } else if (mIsMPEG4) { 2133 mCodecSpecificDataSize = buffer->range_length(); 2134 mCodecSpecificData = malloc(mCodecSpecificDataSize); 2135 memcpy(mCodecSpecificData, 2136 (const uint8_t *)buffer->data() 2137 + buffer->range_offset(), 2138 buffer->range_length()); 2139 } 2140 2141 buffer->release(); 2142 buffer = NULL; 2143 2144 mGotAllCodecSpecificData = true; 2145 continue; 2146 } 2147 2148 // Make a deep copy of the MediaBuffer and Metadata and release 2149 // the original as soon as we can 2150 MediaBuffer *copy = new MediaBuffer(buffer->range_length()); 2151 memcpy(copy->data(), (uint8_t *)buffer->data() + buffer->range_offset(), 2152 buffer->range_length()); 2153 copy->set_range(0, buffer->range_length()); 2154 meta_data = new MetaData(*buffer->meta_data().get()); 2155 buffer->release(); 2156 buffer = NULL; 2157 2158 if (mIsAvc) StripStartcode(copy); 2159 2160 size_t sampleSize = copy->range_length(); 2161 if (mIsAvc) { 2162 if (mOwner->useNalLengthFour()) { 2163 sampleSize += 4; 2164 } else { 2165 sampleSize += 2; 2166 } 2167 } 2168 2169 // Max file size or duration handling 2170 mMdatSizeBytes += sampleSize; 2171 updateTrackSizeEstimate(); 2172 2173 if (mOwner->exceedsFileSizeLimit()) { 2174 mOwner->notify(MEDIA_RECORDER_EVENT_INFO, MEDIA_RECORDER_INFO_MAX_FILESIZE_REACHED, 0); 2175 break; 2176 } 2177 if (mOwner->exceedsFileDurationLimit()) { 2178 mOwner->notify(MEDIA_RECORDER_EVENT_INFO, MEDIA_RECORDER_INFO_MAX_DURATION_REACHED, 0); 2179 break; 2180 } 2181 2182 2183 int32_t isSync = false; 2184 meta_data->findInt32(kKeyIsSyncFrame, &isSync); 2185 CHECK(meta_data->findInt64(kKeyTime, ×tampUs)); 2186 2187 //////////////////////////////////////////////////////////////////////////////// 2188 if (mStszTableEntries->count() == 0) { 2189 mFirstSampleTimeRealUs = systemTime() / 1000; 2190 mStartTimestampUs = timestampUs; 2191 mOwner->setStartTimestampUs(mStartTimestampUs); 2192 previousPausedDurationUs = mStartTimestampUs; 2193 } 2194 2195 if (mResumed) { 2196 int64_t durExcludingEarlierPausesUs = timestampUs - previousPausedDurationUs; 2197 CHECK_GE(durExcludingEarlierPausesUs, 0ll); 2198 int64_t pausedDurationUs = durExcludingEarlierPausesUs - mTrackDurationUs; 2199 CHECK_GE(pausedDurationUs, lastDurationUs); 2200 previousPausedDurationUs += pausedDurationUs - lastDurationUs; 2201 mResumed = false; 2202 } 2203 2204 timestampUs -= previousPausedDurationUs; 2205 CHECK_GE(timestampUs, 0ll); 2206 if (!mIsAudio) { 2207 /* 2208 * Composition time: timestampUs 2209 * Decoding time: decodingTimeUs 2210 * Composition time offset = composition time - decoding time 2211 */ 2212 int64_t decodingTimeUs; 2213 CHECK(meta_data->findInt64(kKeyDecodingTime, &decodingTimeUs)); 2214 decodingTimeUs -= previousPausedDurationUs; 2215 cttsOffsetTimeUs = 2216 timestampUs + kMaxCttsOffsetTimeUs - decodingTimeUs; 2217 CHECK_GE(cttsOffsetTimeUs, 0ll); 2218 timestampUs = decodingTimeUs; 2219 ALOGV("decoding time: %lld and ctts offset time: %lld", 2220 timestampUs, cttsOffsetTimeUs); 2221 2222 // Update ctts box table if necessary 2223 currCttsOffsetTimeTicks = 2224 (cttsOffsetTimeUs * mTimeScale + 500000LL) / 1000000LL; 2225 CHECK_LE(currCttsOffsetTimeTicks, 0x0FFFFFFFFLL); 2226 if (mStszTableEntries->count() == 0) { 2227 // Force the first ctts table entry to have one single entry 2228 // so that we can do adjustment for the initial track start 2229 // time offset easily in writeCttsBox(). 2230 lastCttsOffsetTimeTicks = currCttsOffsetTimeTicks; 2231 addOneCttsTableEntry(1, currCttsOffsetTimeTicks); 2232 cttsSampleCount = 0; // No sample in ctts box is pending 2233 } else { 2234 if (currCttsOffsetTimeTicks != lastCttsOffsetTimeTicks) { 2235 addOneCttsTableEntry(cttsSampleCount, lastCttsOffsetTimeTicks); 2236 lastCttsOffsetTimeTicks = currCttsOffsetTimeTicks; 2237 cttsSampleCount = 1; // One sample in ctts box is pending 2238 } else { 2239 ++cttsSampleCount; 2240 } 2241 } 2242 2243 // Update ctts time offset range 2244 if (mStszTableEntries->count() == 0) { 2245 mMinCttsOffsetTimeUs = currCttsOffsetTimeTicks; 2246 mMaxCttsOffsetTimeUs = currCttsOffsetTimeTicks; 2247 } else { 2248 if (currCttsOffsetTimeTicks > mMaxCttsOffsetTimeUs) { 2249 mMaxCttsOffsetTimeUs = currCttsOffsetTimeTicks; 2250 } else if (currCttsOffsetTimeTicks < mMinCttsOffsetTimeUs) { 2251 mMinCttsOffsetTimeUs = currCttsOffsetTimeTicks; 2252 } 2253 } 2254 2255 } 2256 2257 if (mOwner->isRealTimeRecording()) { 2258 if (mIsAudio) { 2259 updateDriftTime(meta_data); 2260 } 2261 } 2262 2263 CHECK_GE(timestampUs, 0ll); 2264 ALOGV("%s media time stamp: %lld and previous paused duration %lld", 2265 mIsAudio? "Audio": "Video", timestampUs, previousPausedDurationUs); 2266 if (timestampUs > mTrackDurationUs) { 2267 mTrackDurationUs = timestampUs; 2268 } 2269 2270 // We need to use the time scale based ticks, rather than the 2271 // timestamp itself to determine whether we have to use a new 2272 // stts entry, since we may have rounding errors. 2273 // The calculation is intended to reduce the accumulated 2274 // rounding errors. 2275 currDurationTicks = 2276 ((timestampUs * mTimeScale + 500000LL) / 1000000LL - 2277 (lastTimestampUs * mTimeScale + 500000LL) / 1000000LL); 2278 if (currDurationTicks < 0ll) { 2279 ALOGE("timestampUs %lld < lastTimestampUs %lld for %s track", 2280 timestampUs, lastTimestampUs, mIsAudio? "Audio": "Video"); 2281 return UNKNOWN_ERROR; 2282 } 2283 2284 mStszTableEntries->add(htonl(sampleSize)); 2285 if (mStszTableEntries->count() > 2) { 2286 2287 // Force the first sample to have its own stts entry so that 2288 // we can adjust its value later to maintain the A/V sync. 2289 if (mStszTableEntries->count() == 3 || currDurationTicks != lastDurationTicks) { 2290 addOneSttsTableEntry(sampleCount, lastDurationTicks); 2291 sampleCount = 1; 2292 } else { 2293 ++sampleCount; 2294 } 2295 2296 } 2297 if (mSamplesHaveSameSize) { 2298 if (mStszTableEntries->count() >= 2 && previousSampleSize != sampleSize) { 2299 mSamplesHaveSameSize = false; 2300 } 2301 previousSampleSize = sampleSize; 2302 } 2303 ALOGV("%s timestampUs/lastTimestampUs: %lld/%lld", 2304 mIsAudio? "Audio": "Video", timestampUs, lastTimestampUs); 2305 lastDurationUs = timestampUs - lastTimestampUs; 2306 lastDurationTicks = currDurationTicks; 2307 lastTimestampUs = timestampUs; 2308 2309 if (isSync != 0) { 2310 addOneStssTableEntry(mStszTableEntries->count()); 2311 } 2312 2313 if (mTrackingProgressStatus) { 2314 if (mPreviousTrackTimeUs <= 0) { 2315 mPreviousTrackTimeUs = mStartTimestampUs; 2316 } 2317 trackProgressStatus(timestampUs); 2318 } 2319 if (!hasMultipleTracks) { 2320 off64_t offset = mIsAvc? mOwner->addLengthPrefixedSample_l(copy) 2321 : mOwner->addSample_l(copy); 2322 2323 uint32_t count = (mOwner->use32BitFileOffset() 2324 ? mStcoTableEntries->count() 2325 : mCo64TableEntries->count()); 2326 2327 if (count == 0) { 2328 addChunkOffset(offset); 2329 } 2330 copy->release(); 2331 copy = NULL; 2332 continue; 2333 } 2334 2335 mChunkSamples.push_back(copy); 2336 if (interleaveDurationUs == 0) { 2337 addOneStscTableEntry(++nChunks, 1); 2338 bufferChunk(timestampUs); 2339 } else { 2340 if (chunkTimestampUs == 0) { 2341 chunkTimestampUs = timestampUs; 2342 } else { 2343 int64_t chunkDurationUs = timestampUs - chunkTimestampUs; 2344 if (chunkDurationUs > interleaveDurationUs) { 2345 if (chunkDurationUs > mMaxChunkDurationUs) { 2346 mMaxChunkDurationUs = chunkDurationUs; 2347 } 2348 ++nChunks; 2349 if (nChunks == 1 || // First chunk 2350 lastSamplesPerChunk != mChunkSamples.size()) { 2351 lastSamplesPerChunk = mChunkSamples.size(); 2352 addOneStscTableEntry(nChunks, lastSamplesPerChunk); 2353 } 2354 bufferChunk(timestampUs); 2355 chunkTimestampUs = timestampUs; 2356 } 2357 } 2358 } 2359 2360 } 2361 2362 if (isTrackMalFormed()) { 2363 err = ERROR_MALFORMED; 2364 } 2365 2366 mOwner->trackProgressStatus(mTrackId, -1, err); 2367 2368 // Last chunk 2369 if (!hasMultipleTracks) { 2370 addOneStscTableEntry(1, mStszTableEntries->count()); 2371 } else if (!mChunkSamples.empty()) { 2372 addOneStscTableEntry(++nChunks, mChunkSamples.size()); 2373 bufferChunk(timestampUs); 2374 } 2375 2376 // We don't really know how long the last frame lasts, since 2377 // there is no frame time after it, just repeat the previous 2378 // frame's duration. 2379 if (mStszTableEntries->count() == 1) { 2380 lastDurationUs = 0; // A single sample's duration 2381 lastDurationTicks = 0; 2382 } else { 2383 ++sampleCount; // Count for the last sample 2384 } 2385 2386 if (mStszTableEntries->count() <= 2) { 2387 addOneSttsTableEntry(1, lastDurationTicks); 2388 if (sampleCount - 1 > 0) { 2389 addOneSttsTableEntry(sampleCount - 1, lastDurationTicks); 2390 } 2391 } else { 2392 addOneSttsTableEntry(sampleCount, lastDurationTicks); 2393 } 2394 2395 // The last ctts box may not have been written yet, and this 2396 // is to make sure that we write out the last ctts box. 2397 if (currCttsOffsetTimeTicks == lastCttsOffsetTimeTicks) { 2398 if (cttsSampleCount > 0) { 2399 addOneCttsTableEntry(cttsSampleCount, lastCttsOffsetTimeTicks); 2400 } 2401 } 2402 2403 mTrackDurationUs += lastDurationUs; 2404 mReachedEOS = true; 2405 2406 sendTrackSummary(hasMultipleTracks); 2407 2408 ALOGI("Received total/0-length (%d/%d) buffers and encoded %d frames. - %s", 2409 count, nZeroLengthFrames, mStszTableEntries->count(), mIsAudio? "audio": "video"); 2410 if (mIsAudio) { 2411 ALOGI("Audio track drift time: %lld us", mOwner->getDriftTimeUs()); 2412 } 2413 2414 if (err == ERROR_END_OF_STREAM) { 2415 return OK; 2416 } 2417 return err; 2418 } 2419 2420 bool MPEG4Writer::Track::isTrackMalFormed() const { 2421 if (mStszTableEntries->count() == 0) { // no samples written 2422 ALOGE("The number of recorded samples is 0"); 2423 return true; 2424 } 2425 2426 if (!mIsAudio && mStssTableEntries->count() == 0) { // no sync frames for video 2427 ALOGE("There are no sync frames for video track"); 2428 return true; 2429 } 2430 2431 if (OK != checkCodecSpecificData()) { // no codec specific data 2432 return true; 2433 } 2434 2435 return false; 2436 } 2437 2438 void MPEG4Writer::Track::sendTrackSummary(bool hasMultipleTracks) { 2439 2440 // Send track summary only if test mode is enabled. 2441 if (!isTestModeEnabled()) { 2442 return; 2443 } 2444 2445 int trackNum = (mTrackId << 28); 2446 2447 mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2448 trackNum | MEDIA_RECORDER_TRACK_INFO_TYPE, 2449 mIsAudio? 0: 1); 2450 2451 mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2452 trackNum | MEDIA_RECORDER_TRACK_INFO_DURATION_MS, 2453 mTrackDurationUs / 1000); 2454 2455 mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2456 trackNum | MEDIA_RECORDER_TRACK_INFO_ENCODED_FRAMES, 2457 mStszTableEntries->count()); 2458 2459 { 2460 // The system delay time excluding the requested initial delay that 2461 // is used to eliminate the recording sound. 2462 int64_t startTimeOffsetUs = mOwner->getStartTimeOffsetMs() * 1000LL; 2463 if (startTimeOffsetUs < 0) { // Start time offset was not set 2464 startTimeOffsetUs = kInitialDelayTimeUs; 2465 } 2466 int64_t initialDelayUs = 2467 mFirstSampleTimeRealUs - mStartTimeRealUs - startTimeOffsetUs; 2468 2469 mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2470 trackNum | MEDIA_RECORDER_TRACK_INFO_INITIAL_DELAY_MS, 2471 (initialDelayUs) / 1000); 2472 } 2473 2474 mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2475 trackNum | MEDIA_RECORDER_TRACK_INFO_DATA_KBYTES, 2476 mMdatSizeBytes / 1024); 2477 2478 if (hasMultipleTracks) { 2479 mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2480 trackNum | MEDIA_RECORDER_TRACK_INFO_MAX_CHUNK_DUR_MS, 2481 mMaxChunkDurationUs / 1000); 2482 2483 int64_t moovStartTimeUs = mOwner->getStartTimestampUs(); 2484 if (mStartTimestampUs != moovStartTimeUs) { 2485 int64_t startTimeOffsetUs = mStartTimestampUs - moovStartTimeUs; 2486 mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2487 trackNum | MEDIA_RECORDER_TRACK_INFO_START_OFFSET_MS, 2488 startTimeOffsetUs / 1000); 2489 } 2490 } 2491 } 2492 2493 void MPEG4Writer::Track::trackProgressStatus(int64_t timeUs, status_t err) { 2494 ALOGV("trackProgressStatus: %lld us", timeUs); 2495 2496 if (mTrackEveryTimeDurationUs > 0 && 2497 timeUs - mPreviousTrackTimeUs >= mTrackEveryTimeDurationUs) { 2498 ALOGV("Fire time tracking progress status at %lld us", timeUs); 2499 mOwner->trackProgressStatus(mTrackId, timeUs - mPreviousTrackTimeUs, err); 2500 mPreviousTrackTimeUs = timeUs; 2501 } 2502 } 2503 2504 void MPEG4Writer::trackProgressStatus( 2505 size_t trackId, int64_t timeUs, status_t err) { 2506 Mutex::Autolock lock(mLock); 2507 int32_t trackNum = (trackId << 28); 2508 2509 // Error notification 2510 // Do not consider ERROR_END_OF_STREAM an error 2511 if (err != OK && err != ERROR_END_OF_STREAM) { 2512 notify(MEDIA_RECORDER_TRACK_EVENT_ERROR, 2513 trackNum | MEDIA_RECORDER_TRACK_ERROR_GENERAL, 2514 err); 2515 return; 2516 } 2517 2518 if (timeUs == -1) { 2519 // Send completion notification 2520 notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2521 trackNum | MEDIA_RECORDER_TRACK_INFO_COMPLETION_STATUS, 2522 err); 2523 } else { 2524 // Send progress status 2525 notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2526 trackNum | MEDIA_RECORDER_TRACK_INFO_PROGRESS_IN_TIME, 2527 timeUs / 1000); 2528 } 2529 } 2530 2531 void MPEG4Writer::setDriftTimeUs(int64_t driftTimeUs) { 2532 ALOGV("setDriftTimeUs: %lld us", driftTimeUs); 2533 Mutex::Autolock autolock(mLock); 2534 mDriftTimeUs = driftTimeUs; 2535 } 2536 2537 int64_t MPEG4Writer::getDriftTimeUs() { 2538 ALOGV("getDriftTimeUs: %lld us", mDriftTimeUs); 2539 Mutex::Autolock autolock(mLock); 2540 return mDriftTimeUs; 2541 } 2542 2543 bool MPEG4Writer::isRealTimeRecording() const { 2544 return mIsRealTimeRecording; 2545 } 2546 2547 bool MPEG4Writer::useNalLengthFour() { 2548 return mUse4ByteNalLength; 2549 } 2550 2551 void MPEG4Writer::Track::bufferChunk(int64_t timestampUs) { 2552 ALOGV("bufferChunk"); 2553 2554 Chunk chunk(this, timestampUs, mChunkSamples); 2555 mOwner->bufferChunk(chunk); 2556 mChunkSamples.clear(); 2557 } 2558 2559 int64_t MPEG4Writer::Track::getDurationUs() const { 2560 return mTrackDurationUs; 2561 } 2562 2563 int64_t MPEG4Writer::Track::getEstimatedTrackSizeBytes() const { 2564 return mEstimatedTrackSizeBytes; 2565 } 2566 2567 status_t MPEG4Writer::Track::checkCodecSpecificData() const { 2568 const char *mime; 2569 CHECK(mMeta->findCString(kKeyMIMEType, &mime)); 2570 if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AAC, mime) || 2571 !strcasecmp(MEDIA_MIMETYPE_VIDEO_MPEG4, mime) || 2572 !strcasecmp(MEDIA_MIMETYPE_VIDEO_AVC, mime)) { 2573 if (!mCodecSpecificData || 2574 mCodecSpecificDataSize <= 0) { 2575 ALOGE("Missing codec specific data"); 2576 return ERROR_MALFORMED; 2577 } 2578 } else { 2579 if (mCodecSpecificData || 2580 mCodecSpecificDataSize > 0) { 2581 ALOGE("Unexepected codec specific data found"); 2582 return ERROR_MALFORMED; 2583 } 2584 } 2585 return OK; 2586 } 2587 2588 void MPEG4Writer::Track::writeTrackHeader(bool use32BitOffset) { 2589 2590 ALOGV("%s track time scale: %d", 2591 mIsAudio? "Audio": "Video", mTimeScale); 2592 2593 uint32_t now = getMpeg4Time(); 2594 mOwner->beginBox("trak"); 2595 writeTkhdBox(now); 2596 mOwner->beginBox("mdia"); 2597 writeMdhdBox(now); 2598 writeHdlrBox(); 2599 mOwner->beginBox("minf"); 2600 if (mIsAudio) { 2601 writeSmhdBox(); 2602 } else { 2603 writeVmhdBox(); 2604 } 2605 writeDinfBox(); 2606 writeStblBox(use32BitOffset); 2607 mOwner->endBox(); // minf 2608 mOwner->endBox(); // mdia 2609 mOwner->endBox(); // trak 2610 } 2611 2612 void MPEG4Writer::Track::writeStblBox(bool use32BitOffset) { 2613 mOwner->beginBox("stbl"); 2614 mOwner->beginBox("stsd"); 2615 mOwner->writeInt32(0); // version=0, flags=0 2616 mOwner->writeInt32(1); // entry count 2617 if (mIsAudio) { 2618 writeAudioFourCCBox(); 2619 } else { 2620 writeVideoFourCCBox(); 2621 } 2622 mOwner->endBox(); // stsd 2623 writeSttsBox(); 2624 writeCttsBox(); 2625 if (!mIsAudio) { 2626 writeStssBox(); 2627 } 2628 writeStszBox(); 2629 writeStscBox(); 2630 writeStcoBox(use32BitOffset); 2631 mOwner->endBox(); // stbl 2632 } 2633 2634 void MPEG4Writer::Track::writeVideoFourCCBox() { 2635 const char *mime; 2636 bool success = mMeta->findCString(kKeyMIMEType, &mime); 2637 CHECK(success); 2638 if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_MPEG4, mime)) { 2639 mOwner->beginBox("mp4v"); 2640 } else if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_H263, mime)) { 2641 mOwner->beginBox("s263"); 2642 } else if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_AVC, mime)) { 2643 mOwner->beginBox("avc1"); 2644 } else { 2645 ALOGE("Unknown mime type '%s'.", mime); 2646 CHECK(!"should not be here, unknown mime type."); 2647 } 2648 2649 mOwner->writeInt32(0); // reserved 2650 mOwner->writeInt16(0); // reserved 2651 mOwner->writeInt16(1); // data ref index 2652 mOwner->writeInt16(0); // predefined 2653 mOwner->writeInt16(0); // reserved 2654 mOwner->writeInt32(0); // predefined 2655 mOwner->writeInt32(0); // predefined 2656 mOwner->writeInt32(0); // predefined 2657 2658 int32_t width, height; 2659 success = mMeta->findInt32(kKeyWidth, &width); 2660 success = success && mMeta->findInt32(kKeyHeight, &height); 2661 CHECK(success); 2662 2663 mOwner->writeInt16(width); 2664 mOwner->writeInt16(height); 2665 mOwner->writeInt32(0x480000); // horiz resolution 2666 mOwner->writeInt32(0x480000); // vert resolution 2667 mOwner->writeInt32(0); // reserved 2668 mOwner->writeInt16(1); // frame count 2669 mOwner->writeInt8(0); // compressor string length 2670 mOwner->write(" ", 31); 2671 mOwner->writeInt16(0x18); // depth 2672 mOwner->writeInt16(-1); // predefined 2673 2674 CHECK_LT(23 + mCodecSpecificDataSize, 128); 2675 2676 if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_MPEG4, mime)) { 2677 writeMp4vEsdsBox(); 2678 } else if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_H263, mime)) { 2679 writeD263Box(); 2680 } else if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_AVC, mime)) { 2681 writeAvccBox(); 2682 } 2683 2684 writePaspBox(); 2685 mOwner->endBox(); // mp4v, s263 or avc1 2686 } 2687 2688 void MPEG4Writer::Track::writeAudioFourCCBox() { 2689 const char *mime; 2690 bool success = mMeta->findCString(kKeyMIMEType, &mime); 2691 CHECK(success); 2692 const char *fourcc = NULL; 2693 if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AMR_NB, mime)) { 2694 fourcc = "samr"; 2695 } else if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AMR_WB, mime)) { 2696 fourcc = "sawb"; 2697 } else if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AAC, mime)) { 2698 fourcc = "mp4a"; 2699 } else { 2700 ALOGE("Unknown mime type '%s'.", mime); 2701 CHECK(!"should not be here, unknown mime type."); 2702 } 2703 2704 mOwner->beginBox(fourcc); // audio format 2705 mOwner->writeInt32(0); // reserved 2706 mOwner->writeInt16(0); // reserved 2707 mOwner->writeInt16(0x1); // data ref index 2708 mOwner->writeInt32(0); // reserved 2709 mOwner->writeInt32(0); // reserved 2710 int32_t nChannels; 2711 CHECK_EQ(true, mMeta->findInt32(kKeyChannelCount, &nChannels)); 2712 mOwner->writeInt16(nChannels); // channel count 2713 mOwner->writeInt16(16); // sample size 2714 mOwner->writeInt16(0); // predefined 2715 mOwner->writeInt16(0); // reserved 2716 2717 int32_t samplerate; 2718 success = mMeta->findInt32(kKeySampleRate, &samplerate); 2719 CHECK(success); 2720 mOwner->writeInt32(samplerate << 16); 2721 if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AAC, mime)) { 2722 writeMp4aEsdsBox(); 2723 } else if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AMR_NB, mime) || 2724 !strcasecmp(MEDIA_MIMETYPE_AUDIO_AMR_WB, mime)) { 2725 writeDamrBox(); 2726 } 2727 mOwner->endBox(); 2728 } 2729 2730 void MPEG4Writer::Track::writeMp4aEsdsBox() { 2731 mOwner->beginBox("esds"); 2732 CHECK(mCodecSpecificData); 2733 CHECK_GT(mCodecSpecificDataSize, 0); 2734 2735 // Make sure all sizes encode to a single byte. 2736 CHECK_LT(mCodecSpecificDataSize + 23, 128); 2737 2738 mOwner->writeInt32(0); // version=0, flags=0 2739 mOwner->writeInt8(0x03); // ES_DescrTag 2740 mOwner->writeInt8(23 + mCodecSpecificDataSize); 2741 mOwner->writeInt16(0x0000);// ES_ID 2742 mOwner->writeInt8(0x00); 2743 2744 mOwner->writeInt8(0x04); // DecoderConfigDescrTag 2745 mOwner->writeInt8(15 + mCodecSpecificDataSize); 2746 mOwner->writeInt8(0x40); // objectTypeIndication ISO/IEC 14492-2 2747 mOwner->writeInt8(0x15); // streamType AudioStream 2748 2749 mOwner->writeInt16(0x03); // XXX 2750 mOwner->writeInt8(0x00); // buffer size 24-bit 2751 mOwner->writeInt32(96000); // max bit rate 2752 mOwner->writeInt32(96000); // avg bit rate 2753 2754 mOwner->writeInt8(0x05); // DecoderSpecificInfoTag 2755 mOwner->writeInt8(mCodecSpecificDataSize); 2756 mOwner->write(mCodecSpecificData, mCodecSpecificDataSize); 2757 2758 static const uint8_t kData2[] = { 2759 0x06, // SLConfigDescriptorTag 2760 0x01, 2761 0x02 2762 }; 2763 mOwner->write(kData2, sizeof(kData2)); 2764 2765 mOwner->endBox(); // esds 2766 } 2767 2768 void MPEG4Writer::Track::writeMp4vEsdsBox() { 2769 CHECK(mCodecSpecificData); 2770 CHECK_GT(mCodecSpecificDataSize, 0); 2771 mOwner->beginBox("esds"); 2772 2773 mOwner->writeInt32(0); // version=0, flags=0 2774 2775 mOwner->writeInt8(0x03); // ES_DescrTag 2776 mOwner->writeInt8(23 + mCodecSpecificDataSize); 2777 mOwner->writeInt16(0x0000); // ES_ID 2778 mOwner->writeInt8(0x1f); 2779 2780 mOwner->writeInt8(0x04); // DecoderConfigDescrTag 2781 mOwner->writeInt8(15 + mCodecSpecificDataSize); 2782 mOwner->writeInt8(0x20); // objectTypeIndication ISO/IEC 14492-2 2783 mOwner->writeInt8(0x11); // streamType VisualStream 2784 2785 static const uint8_t kData[] = { 2786 0x01, 0x77, 0x00, 2787 0x00, 0x03, 0xe8, 0x00, 2788 0x00, 0x03, 0xe8, 0x00 2789 }; 2790 mOwner->write(kData, sizeof(kData)); 2791 2792 mOwner->writeInt8(0x05); // DecoderSpecificInfoTag 2793 2794 mOwner->writeInt8(mCodecSpecificDataSize); 2795 mOwner->write(mCodecSpecificData, mCodecSpecificDataSize); 2796 2797 static const uint8_t kData2[] = { 2798 0x06, // SLConfigDescriptorTag 2799 0x01, 2800 0x02 2801 }; 2802 mOwner->write(kData2, sizeof(kData2)); 2803 2804 mOwner->endBox(); // esds 2805 } 2806 2807 void MPEG4Writer::Track::writeTkhdBox(uint32_t now) { 2808 mOwner->beginBox("tkhd"); 2809 // Flags = 7 to indicate that the track is enabled, and 2810 // part of the presentation 2811 mOwner->writeInt32(0x07); // version=0, flags=7 2812 mOwner->writeInt32(now); // creation time 2813 mOwner->writeInt32(now); // modification time 2814 mOwner->writeInt32(mTrackId); // track id starts with 1 2815 mOwner->writeInt32(0); // reserved 2816 int64_t trakDurationUs = getDurationUs(); 2817 int32_t mvhdTimeScale = mOwner->getTimeScale(); 2818 int32_t tkhdDuration = 2819 (trakDurationUs * mvhdTimeScale + 5E5) / 1E6; 2820 mOwner->writeInt32(tkhdDuration); // in mvhd timescale 2821 mOwner->writeInt32(0); // reserved 2822 mOwner->writeInt32(0); // reserved 2823 mOwner->writeInt16(0); // layer 2824 mOwner->writeInt16(0); // alternate group 2825 mOwner->writeInt16(mIsAudio ? 0x100 : 0); // volume 2826 mOwner->writeInt16(0); // reserved 2827 2828 mOwner->writeCompositionMatrix(mRotation); // matrix 2829 2830 if (mIsAudio) { 2831 mOwner->writeInt32(0); 2832 mOwner->writeInt32(0); 2833 } else { 2834 int32_t width, height; 2835 bool success = mMeta->findInt32(kKeyWidth, &width); 2836 success = success && mMeta->findInt32(kKeyHeight, &height); 2837 CHECK(success); 2838 2839 mOwner->writeInt32(width << 16); // 32-bit fixed-point value 2840 mOwner->writeInt32(height << 16); // 32-bit fixed-point value 2841 } 2842 mOwner->endBox(); // tkhd 2843 } 2844 2845 void MPEG4Writer::Track::writeVmhdBox() { 2846 mOwner->beginBox("vmhd"); 2847 mOwner->writeInt32(0x01); // version=0, flags=1 2848 mOwner->writeInt16(0); // graphics mode 2849 mOwner->writeInt16(0); // opcolor 2850 mOwner->writeInt16(0); 2851 mOwner->writeInt16(0); 2852 mOwner->endBox(); 2853 } 2854 2855 void MPEG4Writer::Track::writeSmhdBox() { 2856 mOwner->beginBox("smhd"); 2857 mOwner->writeInt32(0); // version=0, flags=0 2858 mOwner->writeInt16(0); // balance 2859 mOwner->writeInt16(0); // reserved 2860 mOwner->endBox(); 2861 } 2862 2863 void MPEG4Writer::Track::writeHdlrBox() { 2864 mOwner->beginBox("hdlr"); 2865 mOwner->writeInt32(0); // version=0, flags=0 2866 mOwner->writeInt32(0); // component type: should be mhlr 2867 mOwner->writeFourcc(mIsAudio ? "soun" : "vide"); // component subtype 2868 mOwner->writeInt32(0); // reserved 2869 mOwner->writeInt32(0); // reserved 2870 mOwner->writeInt32(0); // reserved 2871 // Removing "r" for the name string just makes the string 4 byte aligned 2872 mOwner->writeCString(mIsAudio ? "SoundHandle": "VideoHandle"); // name 2873 mOwner->endBox(); 2874 } 2875 2876 void MPEG4Writer::Track::writeMdhdBox(uint32_t now) { 2877 int64_t trakDurationUs = getDurationUs(); 2878 mOwner->beginBox("mdhd"); 2879 mOwner->writeInt32(0); // version=0, flags=0 2880 mOwner->writeInt32(now); // creation time 2881 mOwner->writeInt32(now); // modification time 2882 mOwner->writeInt32(mTimeScale); // media timescale 2883 int32_t mdhdDuration = (trakDurationUs * mTimeScale + 5E5) / 1E6; 2884 mOwner->writeInt32(mdhdDuration); // use media timescale 2885 // Language follows the three letter standard ISO-639-2/T 2886 // 'e', 'n', 'g' for "English", for instance. 2887 // Each character is packed as the difference between its ASCII value and 0x60. 2888 // For "English", these are 00101, 01110, 00111. 2889 // XXX: Where is the padding bit located: 0x15C7? 2890 mOwner->writeInt16(0); // language code 2891 mOwner->writeInt16(0); // predefined 2892 mOwner->endBox(); 2893 } 2894 2895 void MPEG4Writer::Track::writeDamrBox() { 2896 // 3gpp2 Spec AMRSampleEntry fields 2897 mOwner->beginBox("damr"); 2898 mOwner->writeCString(" "); // vendor: 4 bytes 2899 mOwner->writeInt8(0); // decoder version 2900 mOwner->writeInt16(0x83FF); // mode set: all enabled 2901 mOwner->writeInt8(0); // mode change period 2902 mOwner->writeInt8(1); // frames per sample 2903 mOwner->endBox(); 2904 } 2905 2906 void MPEG4Writer::Track::writeUrlBox() { 2907 // The table index here refers to the sample description index 2908 // in the sample table entries. 2909 mOwner->beginBox("url "); 2910 mOwner->writeInt32(1); // version=0, flags=1 (self-contained) 2911 mOwner->endBox(); // url 2912 } 2913 2914 void MPEG4Writer::Track::writeDrefBox() { 2915 mOwner->beginBox("dref"); 2916 mOwner->writeInt32(0); // version=0, flags=0 2917 mOwner->writeInt32(1); // entry count (either url or urn) 2918 writeUrlBox(); 2919 mOwner->endBox(); // dref 2920 } 2921 2922 void MPEG4Writer::Track::writeDinfBox() { 2923 mOwner->beginBox("dinf"); 2924 writeDrefBox(); 2925 mOwner->endBox(); // dinf 2926 } 2927 2928 void MPEG4Writer::Track::writeAvccBox() { 2929 CHECK(mCodecSpecificData); 2930 CHECK_GE(mCodecSpecificDataSize, 5); 2931 2932 // Patch avcc's lengthSize field to match the number 2933 // of bytes we use to indicate the size of a nal unit. 2934 uint8_t *ptr = (uint8_t *)mCodecSpecificData; 2935 ptr[4] = (ptr[4] & 0xfc) | (mOwner->useNalLengthFour() ? 3 : 1); 2936 mOwner->beginBox("avcC"); 2937 mOwner->write(mCodecSpecificData, mCodecSpecificDataSize); 2938 mOwner->endBox(); // avcC 2939 } 2940 2941 void MPEG4Writer::Track::writeD263Box() { 2942 mOwner->beginBox("d263"); 2943 mOwner->writeInt32(0); // vendor 2944 mOwner->writeInt8(0); // decoder version 2945 mOwner->writeInt8(10); // level: 10 2946 mOwner->writeInt8(0); // profile: 0 2947 mOwner->endBox(); // d263 2948 } 2949 2950 // This is useful if the pixel is not square 2951 void MPEG4Writer::Track::writePaspBox() { 2952 mOwner->beginBox("pasp"); 2953 mOwner->writeInt32(1 << 16); // hspacing 2954 mOwner->writeInt32(1 << 16); // vspacing 2955 mOwner->endBox(); // pasp 2956 } 2957 2958 int32_t MPEG4Writer::Track::getStartTimeOffsetScaledTime() const { 2959 int64_t trackStartTimeOffsetUs = 0; 2960 int64_t moovStartTimeUs = mOwner->getStartTimestampUs(); 2961 if (mStartTimestampUs != moovStartTimeUs) { 2962 CHECK_GT(mStartTimestampUs, moovStartTimeUs); 2963 trackStartTimeOffsetUs = mStartTimestampUs - moovStartTimeUs; 2964 } 2965 return (trackStartTimeOffsetUs * mTimeScale + 500000LL) / 1000000LL; 2966 } 2967 2968 void MPEG4Writer::Track::writeSttsBox() { 2969 mOwner->beginBox("stts"); 2970 mOwner->writeInt32(0); // version=0, flags=0 2971 uint32_t duration; 2972 CHECK(mSttsTableEntries->get(duration, 1)); 2973 duration = htonl(duration); // Back to host byte order 2974 mSttsTableEntries->set(htonl(duration + getStartTimeOffsetScaledTime()), 1); 2975 mSttsTableEntries->write(mOwner); 2976 mOwner->endBox(); // stts 2977 } 2978 2979 void MPEG4Writer::Track::writeCttsBox() { 2980 if (mIsAudio) { // ctts is not for audio 2981 return; 2982 } 2983 2984 // There is no B frame at all 2985 if (mMinCttsOffsetTimeUs == mMaxCttsOffsetTimeUs) { 2986 return; 2987 } 2988 2989 // Do not write ctts box when there is no need to have it. 2990 if (mCttsTableEntries->count() == 0) { 2991 return; 2992 } 2993 2994 ALOGV("ctts box has %d entries with range [%lld, %lld]", 2995 mCttsTableEntries->count(), mMinCttsOffsetTimeUs, mMaxCttsOffsetTimeUs); 2996 2997 mOwner->beginBox("ctts"); 2998 mOwner->writeInt32(0); // version=0, flags=0 2999 uint32_t duration; 3000 CHECK(mCttsTableEntries->get(duration, 1)); 3001 duration = htonl(duration); // Back host byte order 3002 mCttsTableEntries->set(htonl(duration + getStartTimeOffsetScaledTime() - mMinCttsOffsetTimeUs), 1); 3003 mCttsTableEntries->write(mOwner); 3004 mOwner->endBox(); // ctts 3005 } 3006 3007 void MPEG4Writer::Track::writeStssBox() { 3008 mOwner->beginBox("stss"); 3009 mOwner->writeInt32(0); // version=0, flags=0 3010 mStssTableEntries->write(mOwner); 3011 mOwner->endBox(); // stss 3012 } 3013 3014 void MPEG4Writer::Track::writeStszBox() { 3015 mOwner->beginBox("stsz"); 3016 mOwner->writeInt32(0); // version=0, flags=0 3017 mOwner->writeInt32(0); 3018 mStszTableEntries->write(mOwner); 3019 mOwner->endBox(); // stsz 3020 } 3021 3022 void MPEG4Writer::Track::writeStscBox() { 3023 mOwner->beginBox("stsc"); 3024 mOwner->writeInt32(0); // version=0, flags=0 3025 mStscTableEntries->write(mOwner); 3026 mOwner->endBox(); // stsc 3027 } 3028 3029 void MPEG4Writer::Track::writeStcoBox(bool use32BitOffset) { 3030 mOwner->beginBox(use32BitOffset? "stco": "co64"); 3031 mOwner->writeInt32(0); // version=0, flags=0 3032 if (use32BitOffset) { 3033 mStcoTableEntries->write(mOwner); 3034 } else { 3035 mCo64TableEntries->write(mOwner); 3036 } 3037 mOwner->endBox(); // stco or co64 3038 } 3039 3040 void MPEG4Writer::writeUdtaBox() { 3041 beginBox("udta"); 3042 writeGeoDataBox(); 3043 endBox(); 3044 } 3045 3046 /* 3047 * Geodata is stored according to ISO-6709 standard. 3048 */ 3049 void MPEG4Writer::writeGeoDataBox() { 3050 beginBox("\xA9xyz"); 3051 /* 3052 * For historical reasons, any user data start 3053 * with "\0xA9", must be followed by its assoicated 3054 * language code. 3055 * 0x0012: text string length 3056 * 0x15c7: lang (locale) code: en 3057 */ 3058 writeInt32(0x001215c7); 3059 writeLatitude(mLatitudex10000); 3060 writeLongitude(mLongitudex10000); 3061 writeInt8(0x2F); 3062 endBox(); 3063 } 3064 3065 } // namespace android 3066
