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 = 0x007fffffffLL; 47 static const uint8_t kNalUnitTypeSeqParamSet = 0x07; 48 static const uint8_t kNalUnitTypePicParamSet = 0x08; 49 static const int64_t kInitialDelayTimeUs = 700000LL; 50 51 class MPEG4Writer::Track { 52 public: 53 Track(MPEG4Writer *owner, const sp<MediaSource> &source, size_t trackId); 54 55 ~Track(); 56 57 status_t start(MetaData *params); 58 status_t stop(); 59 status_t pause(); 60 bool reachedEOS(); 61 62 int64_t getDurationUs() const; 63 int64_t getEstimatedTrackSizeBytes() const; 64 void writeTrackHeader(bool use32BitOffset = true); 65 void bufferChunk(int64_t timestampUs); 66 bool isAvc() const { return mIsAvc; } 67 bool isAudio() const { return mIsAudio; } 68 bool isMPEG4() const { return mIsMPEG4; } 69 void addChunkOffset(off64_t offset); 70 int32_t getTrackId() const { return mTrackId; } 71 status_t dump(int fd, const Vector<String16>& args) const; 72 73 private: 74 enum { 75 kMaxCttsOffsetTimeUs = 1000000LL, // 1 second 76 kSampleArraySize = 1000, 77 }; 78 79 // A helper class to handle faster write box with table entries 80 template<class TYPE> 81 struct ListTableEntries { 82 ListTableEntries(uint32_t elementCapacity, uint32_t entryCapacity) 83 : mElementCapacity(elementCapacity), 84 mEntryCapacity(entryCapacity), 85 mTotalNumTableEntries(0), 86 mNumValuesInCurrEntry(0), 87 mCurrTableEntriesElement(NULL) { 88 CHECK_GT(mElementCapacity, 0); 89 CHECK_GT(mEntryCapacity, 0); 90 } 91 92 // Free the allocated memory. 93 ~ListTableEntries() { 94 while (!mTableEntryList.empty()) { 95 typename List<TYPE *>::iterator it = mTableEntryList.begin(); 96 delete[] (*it); 97 mTableEntryList.erase(it); 98 } 99 } 100 101 // Replace the value at the given position by the given value. 102 // There must be an existing value at the given position. 103 // @arg value must be in network byte order 104 // @arg pos location the value must be in. 105 void set(const TYPE& value, uint32_t pos) { 106 CHECK_LT(pos, mTotalNumTableEntries * mEntryCapacity); 107 108 typename List<TYPE *>::iterator it = mTableEntryList.begin(); 109 uint32_t iterations = (pos / (mElementCapacity * mEntryCapacity)); 110 while (it != mTableEntryList.end() && iterations > 0) { 111 ++it; 112 --iterations; 113 } 114 CHECK(it != mTableEntryList.end()); 115 CHECK_EQ(iterations, 0); 116 117 (*it)[(pos % (mElementCapacity * mEntryCapacity))] = value; 118 } 119 120 // Get the value at the given position by the given value. 121 // @arg value the retrieved value at the position in network byte order. 122 // @arg pos location the value must be in. 123 // @return true if a value is found. 124 bool get(TYPE& value, uint32_t pos) const { 125 if (pos >= mTotalNumTableEntries * mEntryCapacity) { 126 return false; 127 } 128 129 typename List<TYPE *>::iterator it = mTableEntryList.begin(); 130 uint32_t iterations = (pos / (mElementCapacity * mEntryCapacity)); 131 while (it != mTableEntryList.end() && iterations > 0) { 132 ++it; 133 --iterations; 134 } 135 CHECK(it != mTableEntryList.end()); 136 CHECK_EQ(iterations, 0); 137 138 value = (*it)[(pos % (mElementCapacity * mEntryCapacity))]; 139 return true; 140 } 141 142 // Store a single value. 143 // @arg value must be in network byte order. 144 void add(const TYPE& value) { 145 CHECK_LT(mNumValuesInCurrEntry, mElementCapacity); 146 uint32_t nEntries = mTotalNumTableEntries % mElementCapacity; 147 uint32_t nValues = mNumValuesInCurrEntry % mEntryCapacity; 148 if (nEntries == 0 && nValues == 0) { 149 mCurrTableEntriesElement = new TYPE[mEntryCapacity * mElementCapacity]; 150 CHECK(mCurrTableEntriesElement != NULL); 151 mTableEntryList.push_back(mCurrTableEntriesElement); 152 } 153 154 uint32_t pos = nEntries * mEntryCapacity + nValues; 155 mCurrTableEntriesElement[pos] = value; 156 157 ++mNumValuesInCurrEntry; 158 if ((mNumValuesInCurrEntry % mEntryCapacity) == 0) { 159 ++mTotalNumTableEntries; 160 mNumValuesInCurrEntry = 0; 161 } 162 } 163 164 // Write out the table entries: 165 // 1. the number of entries goes first 166 // 2. followed by the values in the table enties in order 167 // @arg writer the writer to actual write to the storage 168 void write(MPEG4Writer *writer) const { 169 CHECK_EQ(mNumValuesInCurrEntry % mEntryCapacity, 0); 170 uint32_t nEntries = mTotalNumTableEntries; 171 writer->writeInt32(nEntries); 172 for (typename List<TYPE *>::iterator it = mTableEntryList.begin(); 173 it != mTableEntryList.end(); ++it) { 174 CHECK_GT(nEntries, 0); 175 if (nEntries >= mElementCapacity) { 176 writer->write(*it, sizeof(TYPE) * mEntryCapacity, mElementCapacity); 177 nEntries -= mElementCapacity; 178 } else { 179 writer->write(*it, sizeof(TYPE) * mEntryCapacity, nEntries); 180 break; 181 } 182 } 183 } 184 185 // Return the number of entries in the table. 186 uint32_t count() const { return mTotalNumTableEntries; } 187 188 private: 189 uint32_t mElementCapacity; // # entries in an element 190 uint32_t mEntryCapacity; // # of values in each entry 191 uint32_t mTotalNumTableEntries; 192 uint32_t mNumValuesInCurrEntry; // up to mEntryCapacity 193 TYPE *mCurrTableEntriesElement; 194 mutable List<TYPE *> mTableEntryList; 195 196 DISALLOW_EVIL_CONSTRUCTORS(ListTableEntries); 197 }; 198 199 200 201 MPEG4Writer *mOwner; 202 sp<MetaData> mMeta; 203 sp<MediaSource> mSource; 204 volatile bool mDone; 205 volatile bool mPaused; 206 volatile bool mResumed; 207 volatile bool mStarted; 208 bool mIsAvc; 209 bool mIsAudio; 210 bool mIsMPEG4; 211 int32_t mTrackId; 212 int64_t mTrackDurationUs; 213 int64_t mMaxChunkDurationUs; 214 215 int64_t mEstimatedTrackSizeBytes; 216 int64_t mMdatSizeBytes; 217 int32_t mTimeScale; 218 219 pthread_t mThread; 220 221 222 List<MediaBuffer *> mChunkSamples; 223 224 bool mSamplesHaveSameSize; 225 ListTableEntries<uint32_t> *mStszTableEntries; 226 227 ListTableEntries<uint32_t> *mStcoTableEntries; 228 ListTableEntries<off64_t> *mCo64TableEntries; 229 ListTableEntries<uint32_t> *mStscTableEntries; 230 ListTableEntries<uint32_t> *mStssTableEntries; 231 ListTableEntries<uint32_t> *mSttsTableEntries; 232 ListTableEntries<uint32_t> *mCttsTableEntries; 233 234 int64_t mMinCttsOffsetTimeUs; 235 int64_t mMaxCttsOffsetTimeUs; 236 237 // Sequence parameter set or picture parameter set 238 struct AVCParamSet { 239 AVCParamSet(uint16_t length, const uint8_t *data) 240 : mLength(length), mData(data) {} 241 242 uint16_t mLength; 243 const uint8_t *mData; 244 }; 245 List<AVCParamSet> mSeqParamSets; 246 List<AVCParamSet> mPicParamSets; 247 uint8_t mProfileIdc; 248 uint8_t mProfileCompatible; 249 uint8_t mLevelIdc; 250 251 void *mCodecSpecificData; 252 size_t mCodecSpecificDataSize; 253 bool mGotAllCodecSpecificData; 254 bool mTrackingProgressStatus; 255 256 bool mReachedEOS; 257 int64_t mStartTimestampUs; 258 int64_t mStartTimeRealUs; 259 int64_t mFirstSampleTimeRealUs; 260 int64_t mPreviousTrackTimeUs; 261 int64_t mTrackEveryTimeDurationUs; 262 263 // Update the audio track's drift information. 264 void updateDriftTime(const sp<MetaData>& meta); 265 266 int32_t getStartTimeOffsetScaledTime() const; 267 268 static void *ThreadWrapper(void *me); 269 status_t threadEntry(); 270 271 const uint8_t *parseParamSet( 272 const uint8_t *data, size_t length, int type, size_t *paramSetLen); 273 274 status_t makeAVCCodecSpecificData(const uint8_t *data, size_t size); 275 status_t copyAVCCodecSpecificData(const uint8_t *data, size_t size); 276 status_t parseAVCCodecSpecificData(const uint8_t *data, size_t size); 277 278 // Track authoring progress status 279 void trackProgressStatus(int64_t timeUs, status_t err = OK); 280 void initTrackingProgressStatus(MetaData *params); 281 282 void getCodecSpecificDataFromInputFormatIfPossible(); 283 284 // Determine the track time scale 285 // If it is an audio track, try to use the sampling rate as 286 // the time scale; however, if user chooses the overwrite 287 // value, the user-supplied time scale will be used. 288 void setTimeScale(); 289 290 // Simple validation on the codec specific data 291 status_t checkCodecSpecificData() const; 292 int32_t mRotation; 293 294 void updateTrackSizeEstimate(); 295 void addOneStscTableEntry(size_t chunkId, size_t sampleId); 296 void addOneStssTableEntry(size_t sampleId); 297 298 // Duration is time scale based 299 void addOneSttsTableEntry(size_t sampleCount, int32_t timescaledDur); 300 void addOneCttsTableEntry(size_t sampleCount, int32_t timescaledDur); 301 302 bool isTrackMalFormed() const; 303 void sendTrackSummary(bool hasMultipleTracks); 304 305 // Write the boxes 306 void writeStcoBox(bool use32BitOffset); 307 void writeStscBox(); 308 void writeStszBox(); 309 void writeStssBox(); 310 void writeSttsBox(); 311 void writeCttsBox(); 312 void writeD263Box(); 313 void writePaspBox(); 314 void writeAvccBox(); 315 void writeUrlBox(); 316 void writeDrefBox(); 317 void writeDinfBox(); 318 void writeDamrBox(); 319 void writeMdhdBox(uint32_t now); 320 void writeSmhdBox(); 321 void writeVmhdBox(); 322 void writeHdlrBox(); 323 void writeTkhdBox(uint32_t now); 324 void writeMp4aEsdsBox(); 325 void writeMp4vEsdsBox(); 326 void writeAudioFourCCBox(); 327 void writeVideoFourCCBox(); 328 void writeStblBox(bool use32BitOffset); 329 330 Track(const Track &); 331 Track &operator=(const Track &); 332 }; 333 334 MPEG4Writer::MPEG4Writer(const char *filename) 335 : mFd(-1), 336 mInitCheck(NO_INIT), 337 mIsRealTimeRecording(true), 338 mUse4ByteNalLength(true), 339 mUse32BitOffset(true), 340 mIsFileSizeLimitExplicitlyRequested(false), 341 mPaused(false), 342 mStarted(false), 343 mWriterThreadStarted(false), 344 mOffset(0), 345 mMdatOffset(0), 346 mEstimatedMoovBoxSize(0), 347 mInterleaveDurationUs(1000000), 348 mLatitudex10000(0), 349 mLongitudex10000(0), 350 mAreGeoTagsAvailable(false), 351 mStartTimeOffsetMs(-1) { 352 353 mFd = open(filename, O_CREAT | O_LARGEFILE | O_TRUNC | O_RDWR, S_IRUSR | S_IWUSR); 354 if (mFd >= 0) { 355 mInitCheck = OK; 356 } 357 } 358 359 MPEG4Writer::MPEG4Writer(int fd) 360 : mFd(dup(fd)), 361 mInitCheck(mFd < 0? NO_INIT: OK), 362 mIsRealTimeRecording(true), 363 mUse4ByteNalLength(true), 364 mUse32BitOffset(true), 365 mIsFileSizeLimitExplicitlyRequested(false), 366 mPaused(false), 367 mStarted(false), 368 mWriterThreadStarted(false), 369 mOffset(0), 370 mMdatOffset(0), 371 mEstimatedMoovBoxSize(0), 372 mInterleaveDurationUs(1000000), 373 mLatitudex10000(0), 374 mLongitudex10000(0), 375 mAreGeoTagsAvailable(false), 376 mStartTimeOffsetMs(-1) { 377 } 378 379 MPEG4Writer::~MPEG4Writer() { 380 reset(); 381 382 while (!mTracks.empty()) { 383 List<Track *>::iterator it = mTracks.begin(); 384 delete *it; 385 (*it) = NULL; 386 mTracks.erase(it); 387 } 388 mTracks.clear(); 389 } 390 391 status_t MPEG4Writer::dump( 392 int fd, const Vector<String16>& args) { 393 const size_t SIZE = 256; 394 char buffer[SIZE]; 395 String8 result; 396 snprintf(buffer, SIZE, " MPEG4Writer %p\n", this); 397 result.append(buffer); 398 snprintf(buffer, SIZE, " mStarted: %s\n", mStarted? "true": "false"); 399 result.append(buffer); 400 ::write(fd, result.string(), result.size()); 401 for (List<Track *>::iterator it = mTracks.begin(); 402 it != mTracks.end(); ++it) { 403 (*it)->dump(fd, args); 404 } 405 return OK; 406 } 407 408 status_t MPEG4Writer::Track::dump( 409 int fd, const Vector<String16>& args) const { 410 const size_t SIZE = 256; 411 char buffer[SIZE]; 412 String8 result; 413 snprintf(buffer, SIZE, " %s track\n", mIsAudio? "Audio": "Video"); 414 result.append(buffer); 415 snprintf(buffer, SIZE, " reached EOS: %s\n", 416 mReachedEOS? "true": "false"); 417 result.append(buffer); 418 snprintf(buffer, SIZE, " frames encoded : %d\n", mStszTableEntries->count()); 419 result.append(buffer); 420 snprintf(buffer, SIZE, " duration encoded : %lld us\n", mTrackDurationUs); 421 result.append(buffer); 422 ::write(fd, result.string(), result.size()); 423 return OK; 424 } 425 426 status_t MPEG4Writer::addSource(const sp<MediaSource> &source) { 427 Mutex::Autolock l(mLock); 428 if (mStarted) { 429 ALOGE("Attempt to add source AFTER recording is started"); 430 return UNKNOWN_ERROR; 431 } 432 433 // At most 2 tracks can be supported. 434 if (mTracks.size() >= 2) { 435 ALOGE("Too many tracks (%d) to add", mTracks.size()); 436 return ERROR_UNSUPPORTED; 437 } 438 439 CHECK(source.get() != NULL); 440 441 // A track of type other than video or audio is not supported. 442 const char *mime; 443 source->getFormat()->findCString(kKeyMIMEType, &mime); 444 bool isAudio = !strncasecmp(mime, "audio/", 6); 445 bool isVideo = !strncasecmp(mime, "video/", 6); 446 if (!isAudio && !isVideo) { 447 ALOGE("Track (%s) other than video or audio is not supported", 448 mime); 449 return ERROR_UNSUPPORTED; 450 } 451 452 // At this point, we know the track to be added is either 453 // video or audio. Thus, we only need to check whether it 454 // is an audio track or not (if it is not, then it must be 455 // a video track). 456 457 // No more than one video or one audio track is supported. 458 for (List<Track*>::iterator it = mTracks.begin(); 459 it != mTracks.end(); ++it) { 460 if ((*it)->isAudio() == isAudio) { 461 ALOGE("%s track already exists", isAudio? "Audio": "Video"); 462 return ERROR_UNSUPPORTED; 463 } 464 } 465 466 // This is the first track of either audio or video. 467 // Go ahead to add the track. 468 Track *track = new Track(this, source, 1 + mTracks.size()); 469 mTracks.push_back(track); 470 471 return OK; 472 } 473 474 status_t MPEG4Writer::startTracks(MetaData *params) { 475 if (mTracks.empty()) { 476 ALOGE("No source added"); 477 return INVALID_OPERATION; 478 } 479 480 for (List<Track *>::iterator it = mTracks.begin(); 481 it != mTracks.end(); ++it) { 482 status_t err = (*it)->start(params); 483 484 if (err != OK) { 485 for (List<Track *>::iterator it2 = mTracks.begin(); 486 it2 != it; ++it2) { 487 (*it2)->stop(); 488 } 489 490 return err; 491 } 492 } 493 return OK; 494 } 495 496 int64_t MPEG4Writer::estimateMoovBoxSize(int32_t bitRate) { 497 // This implementation is highly experimental/heurisitic. 498 // 499 // Statistical analysis shows that metadata usually accounts 500 // for a small portion of the total file size, usually < 0.6%. 501 502 // The default MIN_MOOV_BOX_SIZE is set to 0.6% x 1MB / 2, 503 // where 1MB is the common file size limit for MMS application. 504 // The default MAX _MOOV_BOX_SIZE value is based on about 3 505 // minute video recording with a bit rate about 3 Mbps, because 506 // statistics also show that most of the video captured are going 507 // to be less than 3 minutes. 508 509 // If the estimation is wrong, we will pay the price of wasting 510 // some reserved space. This should not happen so often statistically. 511 static const int32_t factor = mUse32BitOffset? 1: 2; 512 static const int64_t MIN_MOOV_BOX_SIZE = 3 * 1024; // 3 KB 513 static const int64_t MAX_MOOV_BOX_SIZE = (180 * 3000000 * 6LL / 8000); 514 int64_t size = MIN_MOOV_BOX_SIZE; 515 516 // Max file size limit is set 517 if (mMaxFileSizeLimitBytes != 0 && mIsFileSizeLimitExplicitlyRequested) { 518 size = mMaxFileSizeLimitBytes * 6 / 1000; 519 } 520 521 // Max file duration limit is set 522 if (mMaxFileDurationLimitUs != 0) { 523 if (bitRate > 0) { 524 int64_t size2 = 525 ((mMaxFileDurationLimitUs * bitRate * 6) / 1000 / 8000000); 526 if (mMaxFileSizeLimitBytes != 0 && mIsFileSizeLimitExplicitlyRequested) { 527 // When both file size and duration limits are set, 528 // we use the smaller limit of the two. 529 if (size > size2) { 530 size = size2; 531 } 532 } else { 533 // Only max file duration limit is set 534 size = size2; 535 } 536 } 537 } 538 539 if (size < MIN_MOOV_BOX_SIZE) { 540 size = MIN_MOOV_BOX_SIZE; 541 } 542 543 // Any long duration recording will be probably end up with 544 // non-streamable mp4 file. 545 if (size > MAX_MOOV_BOX_SIZE) { 546 size = MAX_MOOV_BOX_SIZE; 547 } 548 549 ALOGI("limits: %lld/%lld bytes/us, bit rate: %d bps and the estimated" 550 " moov size %lld bytes", 551 mMaxFileSizeLimitBytes, mMaxFileDurationLimitUs, bitRate, size); 552 return factor * size; 553 } 554 555 status_t MPEG4Writer::start(MetaData *param) { 556 if (mInitCheck != OK) { 557 return UNKNOWN_ERROR; 558 } 559 560 /* 561 * Check mMaxFileSizeLimitBytes at the beginning 562 * since mMaxFileSizeLimitBytes may be implicitly 563 * changed later for 32-bit file offset even if 564 * user does not ask to set it explicitly. 565 */ 566 if (mMaxFileSizeLimitBytes != 0) { 567 mIsFileSizeLimitExplicitlyRequested = true; 568 } 569 570 int32_t use64BitOffset; 571 if (param && 572 param->findInt32(kKey64BitFileOffset, &use64BitOffset) && 573 use64BitOffset) { 574 mUse32BitOffset = false; 575 } 576 577 if (mUse32BitOffset) { 578 // Implicit 32 bit file size limit 579 if (mMaxFileSizeLimitBytes == 0) { 580 mMaxFileSizeLimitBytes = kMax32BitFileSize; 581 } 582 583 // If file size is set to be larger than the 32 bit file 584 // size limit, treat it as an error. 585 if (mMaxFileSizeLimitBytes > kMax32BitFileSize) { 586 ALOGW("32-bit file size limit (%lld bytes) too big. " 587 "It is changed to %lld bytes", 588 mMaxFileSizeLimitBytes, kMax32BitFileSize); 589 mMaxFileSizeLimitBytes = kMax32BitFileSize; 590 } 591 } 592 593 int32_t use2ByteNalLength; 594 if (param && 595 param->findInt32(kKey2ByteNalLength, &use2ByteNalLength) && 596 use2ByteNalLength) { 597 mUse4ByteNalLength = false; 598 } 599 600 int32_t isRealTimeRecording; 601 if (param && param->findInt32(kKeyRealTimeRecording, &isRealTimeRecording)) { 602 mIsRealTimeRecording = isRealTimeRecording; 603 } 604 605 mStartTimestampUs = -1; 606 607 if (mStarted) { 608 if (mPaused) { 609 mPaused = false; 610 return startTracks(param); 611 } 612 return OK; 613 } 614 615 if (!param || 616 !param->findInt32(kKeyTimeScale, &mTimeScale)) { 617 mTimeScale = 1000; 618 } 619 CHECK_GT(mTimeScale, 0); 620 ALOGV("movie time scale: %d", mTimeScale); 621 622 /* 623 * When the requested file size limit is small, the priority 624 * is to meet the file size limit requirement, rather than 625 * to make the file streamable. mStreamableFile does not tell 626 * whether the actual recorded file is streamable or not. 627 */ 628 mStreamableFile = 629 (mMaxFileSizeLimitBytes != 0 && 630 mMaxFileSizeLimitBytes >= kMinStreamableFileSizeInBytes); 631 632 /* 633 * mWriteMoovBoxToMemory is true if the amount of data in moov box is 634 * smaller than the reserved free space at the beginning of a file, AND 635 * when the content of moov box is constructed. Note that video/audio 636 * frame data is always written to the file but not in the memory. 637 * 638 * Before stop()/reset() is called, mWriteMoovBoxToMemory is always 639 * false. When reset() is called at the end of a recording session, 640 * Moov box needs to be constructed. 641 * 642 * 1) Right before a moov box is constructed, mWriteMoovBoxToMemory 643 * to set to mStreamableFile so that if 644 * the file is intended to be streamable, it is set to true; 645 * otherwise, it is set to false. When the value is set to false, 646 * all the content of the moov box is written immediately to 647 * the end of the file. When the value is set to true, all the 648 * content of the moov box is written to an in-memory cache, 649 * mMoovBoxBuffer, util the following condition happens. Note 650 * that the size of the in-memory cache is the same as the 651 * reserved free space at the beginning of the file. 652 * 653 * 2) While the data of the moov box is written to an in-memory 654 * cache, the data size is checked against the reserved space. 655 * If the data size surpasses the reserved space, subsequent moov 656 * data could no longer be hold in the in-memory cache. This also 657 * indicates that the reserved space was too small. At this point, 658 * _all_ moov data must be written to the end of the file. 659 * mWriteMoovBoxToMemory must be set to false to direct the write 660 * to the file. 661 * 662 * 3) If the data size in moov box is smaller than the reserved 663 * space after moov box is completely constructed, the in-memory 664 * cache copy of the moov box is written to the reserved free 665 * space. Thus, immediately after the moov is completedly 666 * constructed, mWriteMoovBoxToMemory is always set to false. 667 */ 668 mWriteMoovBoxToMemory = false; 669 mMoovBoxBuffer = NULL; 670 mMoovBoxBufferOffset = 0; 671 672 writeFtypBox(param); 673 674 mFreeBoxOffset = mOffset; 675 676 if (mEstimatedMoovBoxSize == 0) { 677 int32_t bitRate = -1; 678 if (param) { 679 param->findInt32(kKeyBitRate, &bitRate); 680 } 681 mEstimatedMoovBoxSize = estimateMoovBoxSize(bitRate); 682 } 683 CHECK_GE(mEstimatedMoovBoxSize, 8); 684 if (mStreamableFile) { 685 // Reserve a 'free' box only for streamable file 686 lseek64(mFd, mFreeBoxOffset, SEEK_SET); 687 writeInt32(mEstimatedMoovBoxSize); 688 write("free", 4); 689 mMdatOffset = mFreeBoxOffset + mEstimatedMoovBoxSize; 690 } else { 691 mMdatOffset = mOffset; 692 } 693 694 mOffset = mMdatOffset; 695 lseek64(mFd, mMdatOffset, SEEK_SET); 696 if (mUse32BitOffset) { 697 write("????mdat", 8); 698 } else { 699 write("\x00\x00\x00\x01mdat????????", 16); 700 } 701 702 status_t err = startWriterThread(); 703 if (err != OK) { 704 return err; 705 } 706 707 err = startTracks(param); 708 if (err != OK) { 709 return err; 710 } 711 712 mStarted = true; 713 return OK; 714 } 715 716 bool MPEG4Writer::use32BitFileOffset() const { 717 return mUse32BitOffset; 718 } 719 720 status_t MPEG4Writer::pause() { 721 if (mInitCheck != OK) { 722 return OK; 723 } 724 mPaused = true; 725 status_t err = OK; 726 for (List<Track *>::iterator it = mTracks.begin(); 727 it != mTracks.end(); ++it) { 728 status_t status = (*it)->pause(); 729 if (status != OK) { 730 err = status; 731 } 732 } 733 return err; 734 } 735 736 void MPEG4Writer::stopWriterThread() { 737 ALOGD("Stopping writer thread"); 738 if (!mWriterThreadStarted) { 739 return; 740 } 741 742 { 743 Mutex::Autolock autolock(mLock); 744 745 mDone = true; 746 mChunkReadyCondition.signal(); 747 } 748 749 void *dummy; 750 pthread_join(mThread, &dummy); 751 mWriterThreadStarted = false; 752 ALOGD("Writer thread stopped"); 753 } 754 755 /* 756 * MP4 file standard defines a composition matrix: 757 * | a b u | 758 * | c d v | 759 * | x y w | 760 * 761 * the element in the matrix is stored in the following 762 * order: {a, b, u, c, d, v, x, y, w}, 763 * where a, b, c, d, x, and y is in 16.16 format, while 764 * u, v and w is in 2.30 format. 765 */ 766 void MPEG4Writer::writeCompositionMatrix(int degrees) { 767 ALOGV("writeCompositionMatrix"); 768 uint32_t a = 0x00010000; 769 uint32_t b = 0; 770 uint32_t c = 0; 771 uint32_t d = 0x00010000; 772 switch (degrees) { 773 case 0: 774 break; 775 case 90: 776 a = 0; 777 b = 0x00010000; 778 c = 0xFFFF0000; 779 d = 0; 780 break; 781 case 180: 782 a = 0xFFFF0000; 783 d = 0xFFFF0000; 784 break; 785 case 270: 786 a = 0; 787 b = 0xFFFF0000; 788 c = 0x00010000; 789 d = 0; 790 break; 791 default: 792 CHECK(!"Should never reach this unknown rotation"); 793 break; 794 } 795 796 writeInt32(a); // a 797 writeInt32(b); // b 798 writeInt32(0); // u 799 writeInt32(c); // c 800 writeInt32(d); // d 801 writeInt32(0); // v 802 writeInt32(0); // x 803 writeInt32(0); // y 804 writeInt32(0x40000000); // w 805 } 806 807 void MPEG4Writer::release() { 808 close(mFd); 809 mFd = -1; 810 mInitCheck = NO_INIT; 811 mStarted = false; 812 } 813 814 status_t MPEG4Writer::reset() { 815 if (mInitCheck != OK) { 816 return OK; 817 } else { 818 if (!mWriterThreadStarted || 819 !mStarted) { 820 if (mWriterThreadStarted) { 821 stopWriterThread(); 822 } 823 release(); 824 return OK; 825 } 826 } 827 828 status_t err = OK; 829 int64_t maxDurationUs = 0; 830 int64_t minDurationUs = 0x7fffffffffffffffLL; 831 for (List<Track *>::iterator it = mTracks.begin(); 832 it != mTracks.end(); ++it) { 833 status_t status = (*it)->stop(); 834 if (err == OK && status != OK) { 835 err = status; 836 } 837 838 int64_t durationUs = (*it)->getDurationUs(); 839 if (durationUs > maxDurationUs) { 840 maxDurationUs = durationUs; 841 } 842 if (durationUs < minDurationUs) { 843 minDurationUs = durationUs; 844 } 845 } 846 847 if (mTracks.size() > 1) { 848 ALOGD("Duration from tracks range is [%lld, %lld] us", 849 minDurationUs, maxDurationUs); 850 } 851 852 stopWriterThread(); 853 854 // Do not write out movie header on error. 855 if (err != OK) { 856 release(); 857 return err; 858 } 859 860 // Fix up the size of the 'mdat' chunk. 861 if (mUse32BitOffset) { 862 lseek64(mFd, mMdatOffset, SEEK_SET); 863 int32_t size = htonl(static_cast<int32_t>(mOffset - mMdatOffset)); 864 ::write(mFd, &size, 4); 865 } else { 866 lseek64(mFd, mMdatOffset + 8, SEEK_SET); 867 int64_t size = mOffset - mMdatOffset; 868 size = hton64(size); 869 ::write(mFd, &size, 8); 870 } 871 lseek64(mFd, mOffset, SEEK_SET); 872 873 // Construct moov box now 874 mMoovBoxBufferOffset = 0; 875 mWriteMoovBoxToMemory = mStreamableFile; 876 if (mWriteMoovBoxToMemory) { 877 // There is no need to allocate in-memory cache 878 // for moov box if the file is not streamable. 879 880 mMoovBoxBuffer = (uint8_t *) malloc(mEstimatedMoovBoxSize); 881 CHECK(mMoovBoxBuffer != NULL); 882 } 883 writeMoovBox(maxDurationUs); 884 885 // mWriteMoovBoxToMemory could be set to false in 886 // MPEG4Writer::write() method 887 if (mWriteMoovBoxToMemory) { 888 mWriteMoovBoxToMemory = false; 889 // Content of the moov box is saved in the cache, and the in-memory 890 // moov box needs to be written to the file in a single shot. 891 892 CHECK_LE(mMoovBoxBufferOffset + 8, mEstimatedMoovBoxSize); 893 894 // Moov box 895 lseek64(mFd, mFreeBoxOffset, SEEK_SET); 896 mOffset = mFreeBoxOffset; 897 write(mMoovBoxBuffer, 1, mMoovBoxBufferOffset); 898 899 // Free box 900 lseek64(mFd, mOffset, SEEK_SET); 901 writeInt32(mEstimatedMoovBoxSize - mMoovBoxBufferOffset); 902 write("free", 4); 903 } else { 904 ALOGI("The mp4 file will not be streamable."); 905 } 906 907 // Free in-memory cache for moov box 908 if (mMoovBoxBuffer != NULL) { 909 free(mMoovBoxBuffer); 910 mMoovBoxBuffer = NULL; 911 mMoovBoxBufferOffset = 0; 912 } 913 914 CHECK(mBoxes.empty()); 915 916 release(); 917 return err; 918 } 919 920 uint32_t MPEG4Writer::getMpeg4Time() { 921 time_t now = time(NULL); 922 // MP4 file uses time counting seconds since midnight, Jan. 1, 1904 923 // while time function returns Unix epoch values which starts 924 // at 1970-01-01. Lets add the number of seconds between them 925 uint32_t mpeg4Time = now + (66 * 365 + 17) * (24 * 60 * 60); 926 return mpeg4Time; 927 } 928 929 void MPEG4Writer::writeMvhdBox(int64_t durationUs) { 930 uint32_t now = getMpeg4Time(); 931 beginBox("mvhd"); 932 writeInt32(0); // version=0, flags=0 933 writeInt32(now); // creation time 934 writeInt32(now); // modification time 935 writeInt32(mTimeScale); // mvhd timescale 936 int32_t duration = (durationUs * mTimeScale + 5E5) / 1E6; 937 writeInt32(duration); 938 writeInt32(0x10000); // rate: 1.0 939 writeInt16(0x100); // volume 940 writeInt16(0); // reserved 941 writeInt32(0); // reserved 942 writeInt32(0); // reserved 943 writeCompositionMatrix(0); // matrix 944 writeInt32(0); // predefined 945 writeInt32(0); // predefined 946 writeInt32(0); // predefined 947 writeInt32(0); // predefined 948 writeInt32(0); // predefined 949 writeInt32(0); // predefined 950 writeInt32(mTracks.size() + 1); // nextTrackID 951 endBox(); // mvhd 952 } 953 954 void MPEG4Writer::writeMoovBox(int64_t durationUs) { 955 beginBox("moov"); 956 writeMvhdBox(durationUs); 957 if (mAreGeoTagsAvailable) { 958 writeUdtaBox(); 959 } 960 int32_t id = 1; 961 for (List<Track *>::iterator it = mTracks.begin(); 962 it != mTracks.end(); ++it, ++id) { 963 (*it)->writeTrackHeader(mUse32BitOffset); 964 } 965 endBox(); // moov 966 } 967 968 void MPEG4Writer::writeFtypBox(MetaData *param) { 969 beginBox("ftyp"); 970 971 int32_t fileType; 972 if (param && param->findInt32(kKeyFileType, &fileType) && 973 fileType != OUTPUT_FORMAT_MPEG_4) { 974 writeFourcc("3gp4"); 975 } else { 976 writeFourcc("isom"); 977 } 978 979 writeInt32(0); 980 writeFourcc("isom"); 981 writeFourcc("3gp4"); 982 endBox(); 983 } 984 985 static bool isTestModeEnabled() { 986 #if (PROPERTY_VALUE_MAX < 5) 987 #error "PROPERTY_VALUE_MAX must be at least 5" 988 #endif 989 990 // Test mode is enabled only if rw.media.record.test system 991 // property is enabled. 992 char value[PROPERTY_VALUE_MAX]; 993 if (property_get("rw.media.record.test", value, NULL) && 994 (!strcasecmp(value, "true") || !strcasecmp(value, "1"))) { 995 return true; 996 } 997 return false; 998 } 999 1000 void MPEG4Writer::sendSessionSummary() { 1001 // Send session summary only if test mode is enabled 1002 if (!isTestModeEnabled()) { 1003 return; 1004 } 1005 1006 for (List<ChunkInfo>::iterator it = mChunkInfos.begin(); 1007 it != mChunkInfos.end(); ++it) { 1008 int trackNum = it->mTrack->getTrackId() << 28; 1009 notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 1010 trackNum | MEDIA_RECORDER_TRACK_INTER_CHUNK_TIME_MS, 1011 it->mMaxInterChunkDurUs); 1012 } 1013 } 1014 1015 status_t MPEG4Writer::setInterleaveDuration(uint32_t durationUs) { 1016 mInterleaveDurationUs = durationUs; 1017 return OK; 1018 } 1019 1020 void MPEG4Writer::lock() { 1021 mLock.lock(); 1022 } 1023 1024 void MPEG4Writer::unlock() { 1025 mLock.unlock(); 1026 } 1027 1028 off64_t MPEG4Writer::addSample_l(MediaBuffer *buffer) { 1029 off64_t old_offset = mOffset; 1030 1031 ::write(mFd, 1032 (const uint8_t *)buffer->data() + buffer->range_offset(), 1033 buffer->range_length()); 1034 1035 mOffset += buffer->range_length(); 1036 1037 return old_offset; 1038 } 1039 1040 static void StripStartcode(MediaBuffer *buffer) { 1041 if (buffer->range_length() < 4) { 1042 return; 1043 } 1044 1045 const uint8_t *ptr = 1046 (const uint8_t *)buffer->data() + buffer->range_offset(); 1047 1048 if (!memcmp(ptr, "\x00\x00\x00\x01", 4)) { 1049 buffer->set_range( 1050 buffer->range_offset() + 4, buffer->range_length() - 4); 1051 } 1052 } 1053 1054 off64_t MPEG4Writer::addLengthPrefixedSample_l(MediaBuffer *buffer) { 1055 off64_t old_offset = mOffset; 1056 1057 size_t length = buffer->range_length(); 1058 1059 if (mUse4ByteNalLength) { 1060 uint8_t x = length >> 24; 1061 ::write(mFd, &x, 1); 1062 x = (length >> 16) & 0xff; 1063 ::write(mFd, &x, 1); 1064 x = (length >> 8) & 0xff; 1065 ::write(mFd, &x, 1); 1066 x = length & 0xff; 1067 ::write(mFd, &x, 1); 1068 1069 ::write(mFd, 1070 (const uint8_t *)buffer->data() + buffer->range_offset(), 1071 length); 1072 1073 mOffset += length + 4; 1074 } else { 1075 CHECK_LT(length, 65536); 1076 1077 uint8_t x = length >> 8; 1078 ::write(mFd, &x, 1); 1079 x = length & 0xff; 1080 ::write(mFd, &x, 1); 1081 ::write(mFd, (const uint8_t *)buffer->data() + buffer->range_offset(), length); 1082 mOffset += length + 2; 1083 } 1084 1085 return old_offset; 1086 } 1087 1088 size_t MPEG4Writer::write( 1089 const void *ptr, size_t size, size_t nmemb) { 1090 1091 const size_t bytes = size * nmemb; 1092 if (mWriteMoovBoxToMemory) { 1093 1094 off64_t moovBoxSize = 8 + mMoovBoxBufferOffset + bytes; 1095 if (moovBoxSize > mEstimatedMoovBoxSize) { 1096 // The reserved moov box at the beginning of the file 1097 // is not big enough. Moov box should be written to 1098 // the end of the file from now on, but not to the 1099 // in-memory cache. 1100 1101 // We write partial moov box that is in the memory to 1102 // the file first. 1103 for (List<off64_t>::iterator it = mBoxes.begin(); 1104 it != mBoxes.end(); ++it) { 1105 (*it) += mOffset; 1106 } 1107 lseek64(mFd, mOffset, SEEK_SET); 1108 ::write(mFd, mMoovBoxBuffer, mMoovBoxBufferOffset); 1109 ::write(mFd, ptr, bytes); 1110 mOffset += (bytes + mMoovBoxBufferOffset); 1111 1112 // All subsequent moov box content will be written 1113 // to the end of the file. 1114 mWriteMoovBoxToMemory = false; 1115 } else { 1116 memcpy(mMoovBoxBuffer + mMoovBoxBufferOffset, ptr, bytes); 1117 mMoovBoxBufferOffset += bytes; 1118 } 1119 } else { 1120 ::write(mFd, ptr, size * nmemb); 1121 mOffset += bytes; 1122 } 1123 return bytes; 1124 } 1125 1126 void MPEG4Writer::beginBox(const char *fourcc) { 1127 CHECK_EQ(strlen(fourcc), 4); 1128 1129 mBoxes.push_back(mWriteMoovBoxToMemory? 1130 mMoovBoxBufferOffset: mOffset); 1131 1132 writeInt32(0); 1133 writeFourcc(fourcc); 1134 } 1135 1136 void MPEG4Writer::endBox() { 1137 CHECK(!mBoxes.empty()); 1138 1139 off64_t offset = *--mBoxes.end(); 1140 mBoxes.erase(--mBoxes.end()); 1141 1142 if (mWriteMoovBoxToMemory) { 1143 int32_t x = htonl(mMoovBoxBufferOffset - offset); 1144 memcpy(mMoovBoxBuffer + offset, &x, 4); 1145 } else { 1146 lseek64(mFd, offset, SEEK_SET); 1147 writeInt32(mOffset - offset); 1148 mOffset -= 4; 1149 lseek64(mFd, mOffset, SEEK_SET); 1150 } 1151 } 1152 1153 void MPEG4Writer::writeInt8(int8_t x) { 1154 write(&x, 1, 1); 1155 } 1156 1157 void MPEG4Writer::writeInt16(int16_t x) { 1158 x = htons(x); 1159 write(&x, 1, 2); 1160 } 1161 1162 void MPEG4Writer::writeInt32(int32_t x) { 1163 x = htonl(x); 1164 write(&x, 1, 4); 1165 } 1166 1167 void MPEG4Writer::writeInt64(int64_t x) { 1168 x = hton64(x); 1169 write(&x, 1, 8); 1170 } 1171 1172 void MPEG4Writer::writeCString(const char *s) { 1173 size_t n = strlen(s); 1174 write(s, 1, n + 1); 1175 } 1176 1177 void MPEG4Writer::writeFourcc(const char *s) { 1178 CHECK_EQ(strlen(s), 4); 1179 write(s, 1, 4); 1180 } 1181 1182 1183 // Written in +/-DD.DDDD format 1184 void MPEG4Writer::writeLatitude(int degreex10000) { 1185 bool isNegative = (degreex10000 < 0); 1186 char sign = isNegative? '-': '+'; 1187 1188 // Handle the whole part 1189 char str[9]; 1190 int wholePart = degreex10000 / 10000; 1191 if (wholePart == 0) { 1192 snprintf(str, 5, "%c%.2d.", sign, wholePart); 1193 } else { 1194 snprintf(str, 5, "%+.2d.", wholePart); 1195 } 1196 1197 // Handle the fractional part 1198 int fractionalPart = degreex10000 - (wholePart * 10000); 1199 if (fractionalPart < 0) { 1200 fractionalPart = -fractionalPart; 1201 } 1202 snprintf(&str[4], 5, "%.4d", fractionalPart); 1203 1204 // Do not write the null terminator 1205 write(str, 1, 8); 1206 } 1207 1208 // Written in +/- DDD.DDDD format 1209 void MPEG4Writer::writeLongitude(int degreex10000) { 1210 bool isNegative = (degreex10000 < 0); 1211 char sign = isNegative? '-': '+'; 1212 1213 // Handle the whole part 1214 char str[10]; 1215 int wholePart = degreex10000 / 10000; 1216 if (wholePart == 0) { 1217 snprintf(str, 6, "%c%.3d.", sign, wholePart); 1218 } else { 1219 snprintf(str, 6, "%+.3d.", wholePart); 1220 } 1221 1222 // Handle the fractional part 1223 int fractionalPart = degreex10000 - (wholePart * 10000); 1224 if (fractionalPart < 0) { 1225 fractionalPart = -fractionalPart; 1226 } 1227 snprintf(&str[5], 5, "%.4d", fractionalPart); 1228 1229 // Do not write the null terminator 1230 write(str, 1, 9); 1231 } 1232 1233 /* 1234 * Geodata is stored according to ISO-6709 standard. 1235 * latitudex10000 is latitude in degrees times 10000, and 1236 * longitudex10000 is longitude in degrees times 10000. 1237 * The range for the latitude is in [-90, +90], and 1238 * The range for the longitude is in [-180, +180] 1239 */ 1240 status_t MPEG4Writer::setGeoData(int latitudex10000, int longitudex10000) { 1241 // Is latitude or longitude out of range? 1242 if (latitudex10000 < -900000 || latitudex10000 > 900000 || 1243 longitudex10000 < -1800000 || longitudex10000 > 1800000) { 1244 return BAD_VALUE; 1245 } 1246 1247 mLatitudex10000 = latitudex10000; 1248 mLongitudex10000 = longitudex10000; 1249 mAreGeoTagsAvailable = true; 1250 return OK; 1251 } 1252 1253 void MPEG4Writer::write(const void *data, size_t size) { 1254 write(data, 1, size); 1255 } 1256 1257 bool MPEG4Writer::isFileStreamable() const { 1258 return mStreamableFile; 1259 } 1260 1261 bool MPEG4Writer::exceedsFileSizeLimit() { 1262 // No limit 1263 if (mMaxFileSizeLimitBytes == 0) { 1264 return false; 1265 } 1266 1267 int64_t nTotalBytesEstimate = static_cast<int64_t>(mEstimatedMoovBoxSize); 1268 for (List<Track *>::iterator it = mTracks.begin(); 1269 it != mTracks.end(); ++it) { 1270 nTotalBytesEstimate += (*it)->getEstimatedTrackSizeBytes(); 1271 } 1272 1273 if (!mStreamableFile) { 1274 // Add 1024 bytes as error tolerance 1275 return nTotalBytesEstimate + 1024 >= mMaxFileSizeLimitBytes; 1276 } 1277 // Be conservative in the estimate: do not exceed 95% of 1278 // the target file limit. For small target file size limit, though, 1279 // this will not help. 1280 return (nTotalBytesEstimate >= (95 * mMaxFileSizeLimitBytes) / 100); 1281 } 1282 1283 bool MPEG4Writer::exceedsFileDurationLimit() { 1284 // No limit 1285 if (mMaxFileDurationLimitUs == 0) { 1286 return false; 1287 } 1288 1289 for (List<Track *>::iterator it = mTracks.begin(); 1290 it != mTracks.end(); ++it) { 1291 if ((*it)->getDurationUs() >= mMaxFileDurationLimitUs) { 1292 return true; 1293 } 1294 } 1295 return false; 1296 } 1297 1298 bool MPEG4Writer::reachedEOS() { 1299 bool allDone = true; 1300 for (List<Track *>::iterator it = mTracks.begin(); 1301 it != mTracks.end(); ++it) { 1302 if (!(*it)->reachedEOS()) { 1303 allDone = false; 1304 break; 1305 } 1306 } 1307 1308 return allDone; 1309 } 1310 1311 void MPEG4Writer::setStartTimestampUs(int64_t timeUs) { 1312 ALOGI("setStartTimestampUs: %lld", timeUs); 1313 CHECK_GE(timeUs, 0ll); 1314 Mutex::Autolock autoLock(mLock); 1315 if (mStartTimestampUs < 0 || mStartTimestampUs > timeUs) { 1316 mStartTimestampUs = timeUs; 1317 ALOGI("Earliest track starting time: %lld", mStartTimestampUs); 1318 } 1319 } 1320 1321 int64_t MPEG4Writer::getStartTimestampUs() { 1322 Mutex::Autolock autoLock(mLock); 1323 return mStartTimestampUs; 1324 } 1325 1326 size_t MPEG4Writer::numTracks() { 1327 Mutex::Autolock autolock(mLock); 1328 return mTracks.size(); 1329 } 1330 1331 //////////////////////////////////////////////////////////////////////////////// 1332 1333 MPEG4Writer::Track::Track( 1334 MPEG4Writer *owner, const sp<MediaSource> &source, size_t trackId) 1335 : mOwner(owner), 1336 mMeta(source->getFormat()), 1337 mSource(source), 1338 mDone(false), 1339 mPaused(false), 1340 mResumed(false), 1341 mStarted(false), 1342 mTrackId(trackId), 1343 mTrackDurationUs(0), 1344 mEstimatedTrackSizeBytes(0), 1345 mSamplesHaveSameSize(true), 1346 mStszTableEntries(new ListTableEntries<uint32_t>(1000, 1)), 1347 mStcoTableEntries(new ListTableEntries<uint32_t>(1000, 1)), 1348 mCo64TableEntries(new ListTableEntries<off64_t>(1000, 1)), 1349 mStscTableEntries(new ListTableEntries<uint32_t>(1000, 3)), 1350 mStssTableEntries(new ListTableEntries<uint32_t>(1000, 1)), 1351 mSttsTableEntries(new ListTableEntries<uint32_t>(1000, 2)), 1352 mCttsTableEntries(new ListTableEntries<uint32_t>(1000, 2)), 1353 mCodecSpecificData(NULL), 1354 mCodecSpecificDataSize(0), 1355 mGotAllCodecSpecificData(false), 1356 mReachedEOS(false), 1357 mRotation(0) { 1358 getCodecSpecificDataFromInputFormatIfPossible(); 1359 1360 const char *mime; 1361 mMeta->findCString(kKeyMIMEType, &mime); 1362 mIsAvc = !strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_AVC); 1363 mIsAudio = !strncasecmp(mime, "audio/", 6); 1364 mIsMPEG4 = !strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_MPEG4) || 1365 !strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_AAC); 1366 1367 setTimeScale(); 1368 } 1369 1370 void MPEG4Writer::Track::updateTrackSizeEstimate() { 1371 1372 uint32_t stcoBoxCount = (mOwner->use32BitFileOffset() 1373 ? mStcoTableEntries->count() 1374 : mCo64TableEntries->count()); 1375 int64_t stcoBoxSizeBytes = stcoBoxCount * 4; 1376 int64_t stszBoxSizeBytes = mSamplesHaveSameSize? 4: (mStszTableEntries->count() * 4); 1377 1378 mEstimatedTrackSizeBytes = mMdatSizeBytes; // media data size 1379 if (!mOwner->isFileStreamable()) { 1380 // Reserved free space is not large enough to hold 1381 // all meta data and thus wasted. 1382 mEstimatedTrackSizeBytes += mStscTableEntries->count() * 12 + // stsc box size 1383 mStssTableEntries->count() * 4 + // stss box size 1384 mSttsTableEntries->count() * 8 + // stts box size 1385 mCttsTableEntries->count() * 8 + // ctts box size 1386 stcoBoxSizeBytes + // stco box size 1387 stszBoxSizeBytes; // stsz box size 1388 } 1389 } 1390 1391 void MPEG4Writer::Track::addOneStscTableEntry( 1392 size_t chunkId, size_t sampleId) { 1393 1394 mStscTableEntries->add(htonl(chunkId)); 1395 mStscTableEntries->add(htonl(sampleId)); 1396 mStscTableEntries->add(htonl(1)); 1397 } 1398 1399 void MPEG4Writer::Track::addOneStssTableEntry(size_t sampleId) { 1400 mStssTableEntries->add(htonl(sampleId)); 1401 } 1402 1403 void MPEG4Writer::Track::addOneSttsTableEntry( 1404 size_t sampleCount, int32_t duration) { 1405 1406 if (duration == 0) { 1407 ALOGW("0-duration samples found: %d", sampleCount); 1408 } 1409 mSttsTableEntries->add(htonl(sampleCount)); 1410 mSttsTableEntries->add(htonl(duration)); 1411 } 1412 1413 void MPEG4Writer::Track::addOneCttsTableEntry( 1414 size_t sampleCount, int32_t duration) { 1415 1416 if (mIsAudio) { 1417 return; 1418 } 1419 mCttsTableEntries->add(htonl(sampleCount)); 1420 mCttsTableEntries->add(htonl(duration)); 1421 } 1422 1423 void MPEG4Writer::Track::addChunkOffset(off64_t offset) { 1424 if (mOwner->use32BitFileOffset()) { 1425 uint32_t value = offset; 1426 mStcoTableEntries->add(htonl(value)); 1427 } else { 1428 mCo64TableEntries->add(hton64(offset)); 1429 } 1430 } 1431 1432 void MPEG4Writer::Track::setTimeScale() { 1433 ALOGV("setTimeScale"); 1434 // Default time scale 1435 mTimeScale = 90000; 1436 1437 if (mIsAudio) { 1438 // Use the sampling rate as the default time scale for audio track. 1439 int32_t sampleRate; 1440 bool success = mMeta->findInt32(kKeySampleRate, &sampleRate); 1441 CHECK(success); 1442 mTimeScale = sampleRate; 1443 } 1444 1445 // If someone would like to overwrite the timescale, use user-supplied value. 1446 int32_t timeScale; 1447 if (mMeta->findInt32(kKeyTimeScale, &timeScale)) { 1448 mTimeScale = timeScale; 1449 } 1450 1451 CHECK_GT(mTimeScale, 0); 1452 } 1453 1454 void MPEG4Writer::Track::getCodecSpecificDataFromInputFormatIfPossible() { 1455 const char *mime; 1456 CHECK(mMeta->findCString(kKeyMIMEType, &mime)); 1457 1458 if (!strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_AVC)) { 1459 uint32_t type; 1460 const void *data; 1461 size_t size; 1462 if (mMeta->findData(kKeyAVCC, &type, &data, &size)) { 1463 mCodecSpecificData = malloc(size); 1464 mCodecSpecificDataSize = size; 1465 memcpy(mCodecSpecificData, data, size); 1466 mGotAllCodecSpecificData = true; 1467 } 1468 } else if (!strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_MPEG4) 1469 || !strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_AAC)) { 1470 uint32_t type; 1471 const void *data; 1472 size_t size; 1473 if (mMeta->findData(kKeyESDS, &type, &data, &size)) { 1474 ESDS esds(data, size); 1475 if (esds.getCodecSpecificInfo(&data, &size) == OK) { 1476 mCodecSpecificData = malloc(size); 1477 mCodecSpecificDataSize = size; 1478 memcpy(mCodecSpecificData, data, size); 1479 mGotAllCodecSpecificData = true; 1480 } 1481 } 1482 } 1483 } 1484 1485 MPEG4Writer::Track::~Track() { 1486 stop(); 1487 1488 delete mStszTableEntries; 1489 delete mStcoTableEntries; 1490 delete mCo64TableEntries; 1491 delete mStscTableEntries; 1492 delete mSttsTableEntries; 1493 delete mStssTableEntries; 1494 delete mCttsTableEntries; 1495 1496 mStszTableEntries = NULL; 1497 mStcoTableEntries = NULL; 1498 mCo64TableEntries = NULL; 1499 mStscTableEntries = NULL; 1500 mSttsTableEntries = NULL; 1501 mStssTableEntries = NULL; 1502 mCttsTableEntries = NULL; 1503 1504 if (mCodecSpecificData != NULL) { 1505 free(mCodecSpecificData); 1506 mCodecSpecificData = NULL; 1507 } 1508 } 1509 1510 void MPEG4Writer::Track::initTrackingProgressStatus(MetaData *params) { 1511 ALOGV("initTrackingProgressStatus"); 1512 mPreviousTrackTimeUs = -1; 1513 mTrackingProgressStatus = false; 1514 mTrackEveryTimeDurationUs = 0; 1515 { 1516 int64_t timeUs; 1517 if (params && params->findInt64(kKeyTrackTimeStatus, &timeUs)) { 1518 ALOGV("Receive request to track progress status for every %lld us", timeUs); 1519 mTrackEveryTimeDurationUs = timeUs; 1520 mTrackingProgressStatus = true; 1521 } 1522 } 1523 } 1524 1525 // static 1526 void *MPEG4Writer::ThreadWrapper(void *me) { 1527 ALOGV("ThreadWrapper: %p", me); 1528 MPEG4Writer *writer = static_cast<MPEG4Writer *>(me); 1529 writer->threadFunc(); 1530 return NULL; 1531 } 1532 1533 void MPEG4Writer::bufferChunk(const Chunk& chunk) { 1534 ALOGV("bufferChunk: %p", chunk.mTrack); 1535 Mutex::Autolock autolock(mLock); 1536 CHECK_EQ(mDone, false); 1537 1538 for (List<ChunkInfo>::iterator it = mChunkInfos.begin(); 1539 it != mChunkInfos.end(); ++it) { 1540 1541 if (chunk.mTrack == it->mTrack) { // Found owner 1542 it->mChunks.push_back(chunk); 1543 mChunkReadyCondition.signal(); 1544 return; 1545 } 1546 } 1547 1548 CHECK(!"Received a chunk for a unknown track"); 1549 } 1550 1551 void MPEG4Writer::writeChunkToFile(Chunk* chunk) { 1552 ALOGV("writeChunkToFile: %lld from %s track", 1553 chunk->mTimeStampUs, chunk->mTrack->isAudio()? "audio": "video"); 1554 1555 int32_t isFirstSample = true; 1556 while (!chunk->mSamples.empty()) { 1557 List<MediaBuffer *>::iterator it = chunk->mSamples.begin(); 1558 1559 off64_t offset = chunk->mTrack->isAvc() 1560 ? addLengthPrefixedSample_l(*it) 1561 : addSample_l(*it); 1562 1563 if (isFirstSample) { 1564 chunk->mTrack->addChunkOffset(offset); 1565 isFirstSample = false; 1566 } 1567 1568 (*it)->release(); 1569 (*it) = NULL; 1570 chunk->mSamples.erase(it); 1571 } 1572 chunk->mSamples.clear(); 1573 } 1574 1575 void MPEG4Writer::writeAllChunks() { 1576 ALOGV("writeAllChunks"); 1577 size_t outstandingChunks = 0; 1578 Chunk chunk; 1579 while (findChunkToWrite(&chunk)) { 1580 writeChunkToFile(&chunk); 1581 ++outstandingChunks; 1582 } 1583 1584 sendSessionSummary(); 1585 1586 mChunkInfos.clear(); 1587 ALOGD("%d chunks are written in the last batch", outstandingChunks); 1588 } 1589 1590 bool MPEG4Writer::findChunkToWrite(Chunk *chunk) { 1591 ALOGV("findChunkToWrite"); 1592 1593 int64_t minTimestampUs = 0x7FFFFFFFFFFFFFFFLL; 1594 Track *track = NULL; 1595 for (List<ChunkInfo>::iterator it = mChunkInfos.begin(); 1596 it != mChunkInfos.end(); ++it) { 1597 if (!it->mChunks.empty()) { 1598 List<Chunk>::iterator chunkIt = it->mChunks.begin(); 1599 if (chunkIt->mTimeStampUs < minTimestampUs) { 1600 minTimestampUs = chunkIt->mTimeStampUs; 1601 track = it->mTrack; 1602 } 1603 } 1604 } 1605 1606 if (track == NULL) { 1607 ALOGV("Nothing to be written after all"); 1608 return false; 1609 } 1610 1611 if (mIsFirstChunk) { 1612 mIsFirstChunk = false; 1613 } 1614 1615 for (List<ChunkInfo>::iterator it = mChunkInfos.begin(); 1616 it != mChunkInfos.end(); ++it) { 1617 if (it->mTrack == track) { 1618 *chunk = *(it->mChunks.begin()); 1619 it->mChunks.erase(it->mChunks.begin()); 1620 CHECK_EQ(chunk->mTrack, track); 1621 1622 int64_t interChunkTimeUs = 1623 chunk->mTimeStampUs - it->mPrevChunkTimestampUs; 1624 if (interChunkTimeUs > it->mPrevChunkTimestampUs) { 1625 it->mMaxInterChunkDurUs = interChunkTimeUs; 1626 } 1627 1628 return true; 1629 } 1630 } 1631 1632 return false; 1633 } 1634 1635 void MPEG4Writer::threadFunc() { 1636 ALOGV("threadFunc"); 1637 1638 prctl(PR_SET_NAME, (unsigned long)"MPEG4Writer", 0, 0, 0); 1639 1640 Mutex::Autolock autoLock(mLock); 1641 while (!mDone) { 1642 Chunk chunk; 1643 bool chunkFound = false; 1644 1645 while (!mDone && !(chunkFound = findChunkToWrite(&chunk))) { 1646 mChunkReadyCondition.wait(mLock); 1647 } 1648 1649 // In real time recording mode, write without holding the lock in order 1650 // to reduce the blocking time for media track threads. 1651 // Otherwise, hold the lock until the existing chunks get written to the 1652 // file. 1653 if (chunkFound) { 1654 if (mIsRealTimeRecording) { 1655 mLock.unlock(); 1656 } 1657 writeChunkToFile(&chunk); 1658 if (mIsRealTimeRecording) { 1659 mLock.lock(); 1660 } 1661 } 1662 } 1663 1664 writeAllChunks(); 1665 } 1666 1667 status_t MPEG4Writer::startWriterThread() { 1668 ALOGV("startWriterThread"); 1669 1670 mDone = false; 1671 mIsFirstChunk = true; 1672 mDriftTimeUs = 0; 1673 for (List<Track *>::iterator it = mTracks.begin(); 1674 it != mTracks.end(); ++it) { 1675 ChunkInfo info; 1676 info.mTrack = *it; 1677 info.mPrevChunkTimestampUs = 0; 1678 info.mMaxInterChunkDurUs = 0; 1679 mChunkInfos.push_back(info); 1680 } 1681 1682 pthread_attr_t attr; 1683 pthread_attr_init(&attr); 1684 pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE); 1685 pthread_create(&mThread, &attr, ThreadWrapper, this); 1686 pthread_attr_destroy(&attr); 1687 mWriterThreadStarted = true; 1688 return OK; 1689 } 1690 1691 1692 status_t MPEG4Writer::Track::start(MetaData *params) { 1693 if (!mDone && mPaused) { 1694 mPaused = false; 1695 mResumed = true; 1696 return OK; 1697 } 1698 1699 int64_t startTimeUs; 1700 if (params == NULL || !params->findInt64(kKeyTime, &startTimeUs)) { 1701 startTimeUs = 0; 1702 } 1703 mStartTimeRealUs = startTimeUs; 1704 1705 int32_t rotationDegrees; 1706 if (!mIsAudio && params && params->findInt32(kKeyRotation, &rotationDegrees)) { 1707 mRotation = rotationDegrees; 1708 } 1709 1710 initTrackingProgressStatus(params); 1711 1712 sp<MetaData> meta = new MetaData; 1713 if (mOwner->isRealTimeRecording() && mOwner->numTracks() > 1) { 1714 /* 1715 * This extra delay of accepting incoming audio/video signals 1716 * helps to align a/v start time at the beginning of a recording 1717 * session, and it also helps eliminate the "recording" sound for 1718 * camcorder applications. 1719 * 1720 * If client does not set the start time offset, we fall back to 1721 * use the default initial delay value. 1722 */ 1723 int64_t startTimeOffsetUs = mOwner->getStartTimeOffsetMs() * 1000LL; 1724 if (startTimeOffsetUs < 0) { // Start time offset was not set 1725 startTimeOffsetUs = kInitialDelayTimeUs; 1726 } 1727 startTimeUs += startTimeOffsetUs; 1728 ALOGI("Start time offset: %lld us", startTimeOffsetUs); 1729 } 1730 1731 meta->setInt64(kKeyTime, startTimeUs); 1732 1733 status_t err = mSource->start(meta.get()); 1734 if (err != OK) { 1735 mDone = mReachedEOS = true; 1736 return err; 1737 } 1738 1739 pthread_attr_t attr; 1740 pthread_attr_init(&attr); 1741 pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE); 1742 1743 mDone = false; 1744 mStarted = true; 1745 mTrackDurationUs = 0; 1746 mReachedEOS = false; 1747 mEstimatedTrackSizeBytes = 0; 1748 mMdatSizeBytes = 0; 1749 mMaxChunkDurationUs = 0; 1750 1751 pthread_create(&mThread, &attr, ThreadWrapper, this); 1752 pthread_attr_destroy(&attr); 1753 1754 return OK; 1755 } 1756 1757 status_t MPEG4Writer::Track::pause() { 1758 mPaused = true; 1759 return OK; 1760 } 1761 1762 status_t MPEG4Writer::Track::stop() { 1763 ALOGD("Stopping %s track", mIsAudio? "Audio": "Video"); 1764 if (!mStarted) { 1765 ALOGE("Stop() called but track is not started"); 1766 return ERROR_END_OF_STREAM; 1767 } 1768 1769 if (mDone) { 1770 return OK; 1771 } 1772 mDone = true; 1773 1774 void *dummy; 1775 pthread_join(mThread, &dummy); 1776 1777 status_t err = (status_t) dummy; 1778 1779 ALOGD("Stopping %s track source", mIsAudio? "Audio": "Video"); 1780 { 1781 status_t status = mSource->stop(); 1782 if (err == OK && status != OK && status != ERROR_END_OF_STREAM) { 1783 err = status; 1784 } 1785 } 1786 1787 ALOGD("%s track stopped", mIsAudio? "Audio": "Video"); 1788 return err; 1789 } 1790 1791 bool MPEG4Writer::Track::reachedEOS() { 1792 return mReachedEOS; 1793 } 1794 1795 // static 1796 void *MPEG4Writer::Track::ThreadWrapper(void *me) { 1797 Track *track = static_cast<Track *>(me); 1798 1799 status_t err = track->threadEntry(); 1800 return (void *) err; 1801 } 1802 1803 static void getNalUnitType(uint8_t byte, uint8_t* type) { 1804 ALOGV("getNalUnitType: %d", byte); 1805 1806 // nal_unit_type: 5-bit unsigned integer 1807 *type = (byte & 0x1F); 1808 } 1809 1810 static const uint8_t *findNextStartCode( 1811 const uint8_t *data, size_t length) { 1812 1813 ALOGV("findNextStartCode: %p %d", data, length); 1814 1815 size_t bytesLeft = length; 1816 while (bytesLeft > 4 && 1817 memcmp("\x00\x00\x00\x01", &data[length - bytesLeft], 4)) { 1818 --bytesLeft; 1819 } 1820 if (bytesLeft <= 4) { 1821 bytesLeft = 0; // Last parameter set 1822 } 1823 return &data[length - bytesLeft]; 1824 } 1825 1826 const uint8_t *MPEG4Writer::Track::parseParamSet( 1827 const uint8_t *data, size_t length, int type, size_t *paramSetLen) { 1828 1829 ALOGV("parseParamSet"); 1830 CHECK(type == kNalUnitTypeSeqParamSet || 1831 type == kNalUnitTypePicParamSet); 1832 1833 const uint8_t *nextStartCode = findNextStartCode(data, length); 1834 *paramSetLen = nextStartCode - data; 1835 if (*paramSetLen == 0) { 1836 ALOGE("Param set is malformed, since its length is 0"); 1837 return NULL; 1838 } 1839 1840 AVCParamSet paramSet(*paramSetLen, data); 1841 if (type == kNalUnitTypeSeqParamSet) { 1842 if (*paramSetLen < 4) { 1843 ALOGE("Seq parameter set malformed"); 1844 return NULL; 1845 } 1846 if (mSeqParamSets.empty()) { 1847 mProfileIdc = data[1]; 1848 mProfileCompatible = data[2]; 1849 mLevelIdc = data[3]; 1850 } else { 1851 if (mProfileIdc != data[1] || 1852 mProfileCompatible != data[2] || 1853 mLevelIdc != data[3]) { 1854 ALOGE("Inconsistent profile/level found in seq parameter sets"); 1855 return NULL; 1856 } 1857 } 1858 mSeqParamSets.push_back(paramSet); 1859 } else { 1860 mPicParamSets.push_back(paramSet); 1861 } 1862 return nextStartCode; 1863 } 1864 1865 status_t MPEG4Writer::Track::copyAVCCodecSpecificData( 1866 const uint8_t *data, size_t size) { 1867 ALOGV("copyAVCCodecSpecificData"); 1868 1869 // 2 bytes for each of the parameter set length field 1870 // plus the 7 bytes for the header 1871 if (size < 4 + 7) { 1872 ALOGE("Codec specific data length too short: %d", size); 1873 return ERROR_MALFORMED; 1874 } 1875 1876 mCodecSpecificDataSize = size; 1877 mCodecSpecificData = malloc(size); 1878 memcpy(mCodecSpecificData, data, size); 1879 return OK; 1880 } 1881 1882 status_t MPEG4Writer::Track::parseAVCCodecSpecificData( 1883 const uint8_t *data, size_t size) { 1884 1885 ALOGV("parseAVCCodecSpecificData"); 1886 // Data starts with a start code. 1887 // SPS and PPS are separated with start codes. 1888 // Also, SPS must come before PPS 1889 uint8_t type = kNalUnitTypeSeqParamSet; 1890 bool gotSps = false; 1891 bool gotPps = false; 1892 const uint8_t *tmp = data; 1893 const uint8_t *nextStartCode = data; 1894 size_t bytesLeft = size; 1895 size_t paramSetLen = 0; 1896 mCodecSpecificDataSize = 0; 1897 while (bytesLeft > 4 && !memcmp("\x00\x00\x00\x01", tmp, 4)) { 1898 getNalUnitType(*(tmp + 4), &type); 1899 if (type == kNalUnitTypeSeqParamSet) { 1900 if (gotPps) { 1901 ALOGE("SPS must come before PPS"); 1902 return ERROR_MALFORMED; 1903 } 1904 if (!gotSps) { 1905 gotSps = true; 1906 } 1907 nextStartCode = parseParamSet(tmp + 4, bytesLeft - 4, type, ¶mSetLen); 1908 } else if (type == kNalUnitTypePicParamSet) { 1909 if (!gotSps) { 1910 ALOGE("SPS must come before PPS"); 1911 return ERROR_MALFORMED; 1912 } 1913 if (!gotPps) { 1914 gotPps = true; 1915 } 1916 nextStartCode = parseParamSet(tmp + 4, bytesLeft - 4, type, ¶mSetLen); 1917 } else { 1918 ALOGE("Only SPS and PPS Nal units are expected"); 1919 return ERROR_MALFORMED; 1920 } 1921 1922 if (nextStartCode == NULL) { 1923 return ERROR_MALFORMED; 1924 } 1925 1926 // Move on to find the next parameter set 1927 bytesLeft -= nextStartCode - tmp; 1928 tmp = nextStartCode; 1929 mCodecSpecificDataSize += (2 + paramSetLen); 1930 } 1931 1932 { 1933 // Check on the number of seq parameter sets 1934 size_t nSeqParamSets = mSeqParamSets.size(); 1935 if (nSeqParamSets == 0) { 1936 ALOGE("Cound not find sequence parameter set"); 1937 return ERROR_MALFORMED; 1938 } 1939 1940 if (nSeqParamSets > 0x1F) { 1941 ALOGE("Too many seq parameter sets (%d) found", nSeqParamSets); 1942 return ERROR_MALFORMED; 1943 } 1944 } 1945 1946 { 1947 // Check on the number of pic parameter sets 1948 size_t nPicParamSets = mPicParamSets.size(); 1949 if (nPicParamSets == 0) { 1950 ALOGE("Cound not find picture parameter set"); 1951 return ERROR_MALFORMED; 1952 } 1953 if (nPicParamSets > 0xFF) { 1954 ALOGE("Too many pic parameter sets (%d) found", nPicParamSets); 1955 return ERROR_MALFORMED; 1956 } 1957 } 1958 // FIXME: 1959 // Add chromat_format_idc, bit depth values, etc for AVC/h264 high profile and above 1960 // and remove #if 0 1961 #if 0 1962 { 1963 // Check on the profiles 1964 // These profiles requires additional parameter set extensions 1965 if (mProfileIdc == 100 || mProfileIdc == 110 || 1966 mProfileIdc == 122 || mProfileIdc == 144) { 1967 ALOGE("Sorry, no support for profile_idc: %d!", mProfileIdc); 1968 return BAD_VALUE; 1969 } 1970 } 1971 #endif 1972 return OK; 1973 } 1974 1975 status_t MPEG4Writer::Track::makeAVCCodecSpecificData( 1976 const uint8_t *data, size_t size) { 1977 1978 if (mCodecSpecificData != NULL) { 1979 ALOGE("Already have codec specific data"); 1980 return ERROR_MALFORMED; 1981 } 1982 1983 if (size < 4) { 1984 ALOGE("Codec specific data length too short: %d", size); 1985 return ERROR_MALFORMED; 1986 } 1987 1988 // Data is in the form of AVCCodecSpecificData 1989 if (memcmp("\x00\x00\x00\x01", data, 4)) { 1990 return copyAVCCodecSpecificData(data, size); 1991 } 1992 1993 if (parseAVCCodecSpecificData(data, size) != OK) { 1994 return ERROR_MALFORMED; 1995 } 1996 1997 // ISO 14496-15: AVC file format 1998 mCodecSpecificDataSize += 7; // 7 more bytes in the header 1999 mCodecSpecificData = malloc(mCodecSpecificDataSize); 2000 uint8_t *header = (uint8_t *)mCodecSpecificData; 2001 header[0] = 1; // version 2002 header[1] = mProfileIdc; // profile indication 2003 header[2] = mProfileCompatible; // profile compatibility 2004 header[3] = mLevelIdc; 2005 2006 // 6-bit '111111' followed by 2-bit to lengthSizeMinuusOne 2007 if (mOwner->useNalLengthFour()) { 2008 header[4] = 0xfc | 3; // length size == 4 bytes 2009 } else { 2010 header[4] = 0xfc | 1; // length size == 2 bytes 2011 } 2012 2013 // 3-bit '111' followed by 5-bit numSequenceParameterSets 2014 int nSequenceParamSets = mSeqParamSets.size(); 2015 header[5] = 0xe0 | nSequenceParamSets; 2016 header += 6; 2017 for (List<AVCParamSet>::iterator it = mSeqParamSets.begin(); 2018 it != mSeqParamSets.end(); ++it) { 2019 // 16-bit sequence parameter set length 2020 uint16_t seqParamSetLength = it->mLength; 2021 header[0] = seqParamSetLength >> 8; 2022 header[1] = seqParamSetLength & 0xff; 2023 2024 // SPS NAL unit (sequence parameter length bytes) 2025 memcpy(&header[2], it->mData, seqParamSetLength); 2026 header += (2 + seqParamSetLength); 2027 } 2028 2029 // 8-bit nPictureParameterSets 2030 int nPictureParamSets = mPicParamSets.size(); 2031 header[0] = nPictureParamSets; 2032 header += 1; 2033 for (List<AVCParamSet>::iterator it = mPicParamSets.begin(); 2034 it != mPicParamSets.end(); ++it) { 2035 // 16-bit picture parameter set length 2036 uint16_t picParamSetLength = it->mLength; 2037 header[0] = picParamSetLength >> 8; 2038 header[1] = picParamSetLength & 0xff; 2039 2040 // PPS Nal unit (picture parameter set length bytes) 2041 memcpy(&header[2], it->mData, picParamSetLength); 2042 header += (2 + picParamSetLength); 2043 } 2044 2045 return OK; 2046 } 2047 2048 /* 2049 * Updates the drift time from the audio track so that 2050 * the video track can get the updated drift time information 2051 * from the file writer. The fluctuation of the drift time of the audio 2052 * encoding path is smoothed out with a simple filter by giving a larger 2053 * weight to more recently drift time. The filter coefficients, 0.5 and 0.5, 2054 * are heuristically determined. 2055 */ 2056 void MPEG4Writer::Track::updateDriftTime(const sp<MetaData>& meta) { 2057 int64_t driftTimeUs = 0; 2058 if (meta->findInt64(kKeyDriftTime, &driftTimeUs)) { 2059 int64_t prevDriftTimeUs = mOwner->getDriftTimeUs(); 2060 int64_t timeUs = (driftTimeUs + prevDriftTimeUs) >> 1; 2061 mOwner->setDriftTimeUs(timeUs); 2062 } 2063 } 2064 2065 status_t MPEG4Writer::Track::threadEntry() { 2066 int32_t count = 0; 2067 const int64_t interleaveDurationUs = mOwner->interleaveDuration(); 2068 const bool hasMultipleTracks = (mOwner->numTracks() > 1); 2069 int64_t chunkTimestampUs = 0; 2070 int32_t nChunks = 0; 2071 int32_t nZeroLengthFrames = 0; 2072 int64_t lastTimestampUs = 0; // Previous sample time stamp 2073 int64_t lastDurationUs = 0; // Between the previous two samples 2074 int64_t currDurationTicks = 0; // Timescale based ticks 2075 int64_t lastDurationTicks = 0; // Timescale based ticks 2076 int32_t sampleCount = 1; // Sample count in the current stts table entry 2077 uint32_t previousSampleSize = 0; // Size of the previous sample 2078 int64_t previousPausedDurationUs = 0; 2079 int64_t timestampUs = 0; 2080 int64_t cttsOffsetTimeUs = 0; 2081 int64_t currCttsOffsetTimeTicks = 0; // Timescale based ticks 2082 int64_t lastCttsOffsetTimeTicks = -1; // Timescale based ticks 2083 int32_t cttsSampleCount = 0; // Sample count in the current ctts table entry 2084 uint32_t lastSamplesPerChunk = 0; 2085 2086 if (mIsAudio) { 2087 prctl(PR_SET_NAME, (unsigned long)"AudioTrackEncoding", 0, 0, 0); 2088 } else { 2089 prctl(PR_SET_NAME, (unsigned long)"VideoTrackEncoding", 0, 0, 0); 2090 } 2091 2092 if (mOwner->isRealTimeRecording()) { 2093 androidSetThreadPriority(0, ANDROID_PRIORITY_AUDIO); 2094 } 2095 2096 sp<MetaData> meta_data; 2097 2098 status_t err = OK; 2099 MediaBuffer *buffer; 2100 while (!mDone && (err = mSource->read(&buffer)) == OK) { 2101 if (buffer->range_length() == 0) { 2102 buffer->release(); 2103 buffer = NULL; 2104 ++nZeroLengthFrames; 2105 continue; 2106 } 2107 2108 // If the codec specific data has not been received yet, delay pause. 2109 // After the codec specific data is received, discard what we received 2110 // when the track is to be paused. 2111 if (mPaused && !mResumed) { 2112 buffer->release(); 2113 buffer = NULL; 2114 continue; 2115 } 2116 2117 ++count; 2118 2119 int32_t isCodecConfig; 2120 if (buffer->meta_data()->findInt32(kKeyIsCodecConfig, &isCodecConfig) 2121 && isCodecConfig) { 2122 CHECK(!mGotAllCodecSpecificData); 2123 2124 if (mIsAvc) { 2125 status_t err = makeAVCCodecSpecificData( 2126 (const uint8_t *)buffer->data() 2127 + buffer->range_offset(), 2128 buffer->range_length()); 2129 CHECK_EQ((status_t)OK, err); 2130 } else if (mIsMPEG4) { 2131 mCodecSpecificDataSize = buffer->range_length(); 2132 mCodecSpecificData = malloc(mCodecSpecificDataSize); 2133 memcpy(mCodecSpecificData, 2134 (const uint8_t *)buffer->data() 2135 + buffer->range_offset(), 2136 buffer->range_length()); 2137 } 2138 2139 buffer->release(); 2140 buffer = NULL; 2141 2142 mGotAllCodecSpecificData = true; 2143 continue; 2144 } 2145 2146 // Make a deep copy of the MediaBuffer and Metadata and release 2147 // the original as soon as we can 2148 MediaBuffer *copy = new MediaBuffer(buffer->range_length()); 2149 memcpy(copy->data(), (uint8_t *)buffer->data() + buffer->range_offset(), 2150 buffer->range_length()); 2151 copy->set_range(0, buffer->range_length()); 2152 meta_data = new MetaData(*buffer->meta_data().get()); 2153 buffer->release(); 2154 buffer = NULL; 2155 2156 if (mIsAvc) StripStartcode(copy); 2157 2158 size_t sampleSize = copy->range_length(); 2159 if (mIsAvc) { 2160 if (mOwner->useNalLengthFour()) { 2161 sampleSize += 4; 2162 } else { 2163 sampleSize += 2; 2164 } 2165 } 2166 2167 // Max file size or duration handling 2168 mMdatSizeBytes += sampleSize; 2169 updateTrackSizeEstimate(); 2170 2171 if (mOwner->exceedsFileSizeLimit()) { 2172 mOwner->notify(MEDIA_RECORDER_EVENT_INFO, MEDIA_RECORDER_INFO_MAX_FILESIZE_REACHED, 0); 2173 break; 2174 } 2175 if (mOwner->exceedsFileDurationLimit()) { 2176 mOwner->notify(MEDIA_RECORDER_EVENT_INFO, MEDIA_RECORDER_INFO_MAX_DURATION_REACHED, 0); 2177 break; 2178 } 2179 2180 2181 int32_t isSync = false; 2182 meta_data->findInt32(kKeyIsSyncFrame, &isSync); 2183 CHECK(meta_data->findInt64(kKeyTime, ×tampUs)); 2184 2185 //////////////////////////////////////////////////////////////////////////////// 2186 if (mStszTableEntries->count() == 0) { 2187 mFirstSampleTimeRealUs = systemTime() / 1000; 2188 mStartTimestampUs = timestampUs; 2189 mOwner->setStartTimestampUs(mStartTimestampUs); 2190 previousPausedDurationUs = mStartTimestampUs; 2191 } 2192 2193 if (mResumed) { 2194 int64_t durExcludingEarlierPausesUs = timestampUs - previousPausedDurationUs; 2195 CHECK_GE(durExcludingEarlierPausesUs, 0ll); 2196 int64_t pausedDurationUs = durExcludingEarlierPausesUs - mTrackDurationUs; 2197 CHECK_GE(pausedDurationUs, lastDurationUs); 2198 previousPausedDurationUs += pausedDurationUs - lastDurationUs; 2199 mResumed = false; 2200 } 2201 2202 timestampUs -= previousPausedDurationUs; 2203 CHECK_GE(timestampUs, 0ll); 2204 if (!mIsAudio) { 2205 /* 2206 * Composition time: timestampUs 2207 * Decoding time: decodingTimeUs 2208 * Composition time offset = composition time - decoding time 2209 */ 2210 int64_t decodingTimeUs; 2211 CHECK(meta_data->findInt64(kKeyDecodingTime, &decodingTimeUs)); 2212 decodingTimeUs -= previousPausedDurationUs; 2213 cttsOffsetTimeUs = 2214 timestampUs + kMaxCttsOffsetTimeUs - decodingTimeUs; 2215 CHECK_GE(cttsOffsetTimeUs, 0ll); 2216 timestampUs = decodingTimeUs; 2217 ALOGV("decoding time: %lld and ctts offset time: %lld", 2218 timestampUs, cttsOffsetTimeUs); 2219 2220 // Update ctts box table if necessary 2221 currCttsOffsetTimeTicks = 2222 (cttsOffsetTimeUs * mTimeScale + 500000LL) / 1000000LL; 2223 CHECK_LE(currCttsOffsetTimeTicks, 0x0FFFFFFFFLL); 2224 if (mStszTableEntries->count() == 0) { 2225 // Force the first ctts table entry to have one single entry 2226 // so that we can do adjustment for the initial track start 2227 // time offset easily in writeCttsBox(). 2228 lastCttsOffsetTimeTicks = currCttsOffsetTimeTicks; 2229 addOneCttsTableEntry(1, currCttsOffsetTimeTicks); 2230 cttsSampleCount = 0; // No sample in ctts box is pending 2231 } else { 2232 if (currCttsOffsetTimeTicks != lastCttsOffsetTimeTicks) { 2233 addOneCttsTableEntry(cttsSampleCount, lastCttsOffsetTimeTicks); 2234 lastCttsOffsetTimeTicks = currCttsOffsetTimeTicks; 2235 cttsSampleCount = 1; // One sample in ctts box is pending 2236 } else { 2237 ++cttsSampleCount; 2238 } 2239 } 2240 2241 // Update ctts time offset range 2242 if (mStszTableEntries->count() == 0) { 2243 mMinCttsOffsetTimeUs = currCttsOffsetTimeTicks; 2244 mMaxCttsOffsetTimeUs = currCttsOffsetTimeTicks; 2245 } else { 2246 if (currCttsOffsetTimeTicks > mMaxCttsOffsetTimeUs) { 2247 mMaxCttsOffsetTimeUs = currCttsOffsetTimeTicks; 2248 } else if (currCttsOffsetTimeTicks < mMinCttsOffsetTimeUs) { 2249 mMinCttsOffsetTimeUs = currCttsOffsetTimeTicks; 2250 } 2251 } 2252 2253 } 2254 2255 if (mOwner->isRealTimeRecording()) { 2256 if (mIsAudio) { 2257 updateDriftTime(meta_data); 2258 } 2259 } 2260 2261 CHECK_GE(timestampUs, 0ll); 2262 ALOGV("%s media time stamp: %lld and previous paused duration %lld", 2263 mIsAudio? "Audio": "Video", timestampUs, previousPausedDurationUs); 2264 if (timestampUs > mTrackDurationUs) { 2265 mTrackDurationUs = timestampUs; 2266 } 2267 2268 // We need to use the time scale based ticks, rather than the 2269 // timestamp itself to determine whether we have to use a new 2270 // stts entry, since we may have rounding errors. 2271 // The calculation is intended to reduce the accumulated 2272 // rounding errors. 2273 currDurationTicks = 2274 ((timestampUs * mTimeScale + 500000LL) / 1000000LL - 2275 (lastTimestampUs * mTimeScale + 500000LL) / 1000000LL); 2276 if (currDurationTicks < 0ll) { 2277 ALOGE("timestampUs %lld < lastTimestampUs %lld for %s track", 2278 timestampUs, lastTimestampUs, mIsAudio? "Audio": "Video"); 2279 return UNKNOWN_ERROR; 2280 } 2281 2282 mStszTableEntries->add(htonl(sampleSize)); 2283 if (mStszTableEntries->count() > 2) { 2284 2285 // Force the first sample to have its own stts entry so that 2286 // we can adjust its value later to maintain the A/V sync. 2287 if (mStszTableEntries->count() == 3 || currDurationTicks != lastDurationTicks) { 2288 addOneSttsTableEntry(sampleCount, lastDurationTicks); 2289 sampleCount = 1; 2290 } else { 2291 ++sampleCount; 2292 } 2293 2294 } 2295 if (mSamplesHaveSameSize) { 2296 if (mStszTableEntries->count() >= 2 && previousSampleSize != sampleSize) { 2297 mSamplesHaveSameSize = false; 2298 } 2299 previousSampleSize = sampleSize; 2300 } 2301 ALOGV("%s timestampUs/lastTimestampUs: %lld/%lld", 2302 mIsAudio? "Audio": "Video", timestampUs, lastTimestampUs); 2303 lastDurationUs = timestampUs - lastTimestampUs; 2304 lastDurationTicks = currDurationTicks; 2305 lastTimestampUs = timestampUs; 2306 2307 if (isSync != 0) { 2308 addOneStssTableEntry(mStszTableEntries->count()); 2309 } 2310 2311 if (mTrackingProgressStatus) { 2312 if (mPreviousTrackTimeUs <= 0) { 2313 mPreviousTrackTimeUs = mStartTimestampUs; 2314 } 2315 trackProgressStatus(timestampUs); 2316 } 2317 if (!hasMultipleTracks) { 2318 off64_t offset = mIsAvc? mOwner->addLengthPrefixedSample_l(copy) 2319 : mOwner->addSample_l(copy); 2320 2321 uint32_t count = (mOwner->use32BitFileOffset() 2322 ? mStcoTableEntries->count() 2323 : mCo64TableEntries->count()); 2324 2325 if (count == 0) { 2326 addChunkOffset(offset); 2327 } 2328 copy->release(); 2329 copy = NULL; 2330 continue; 2331 } 2332 2333 mChunkSamples.push_back(copy); 2334 if (interleaveDurationUs == 0) { 2335 addOneStscTableEntry(++nChunks, 1); 2336 bufferChunk(timestampUs); 2337 } else { 2338 if (chunkTimestampUs == 0) { 2339 chunkTimestampUs = timestampUs; 2340 } else { 2341 int64_t chunkDurationUs = timestampUs - chunkTimestampUs; 2342 if (chunkDurationUs > interleaveDurationUs) { 2343 if (chunkDurationUs > mMaxChunkDurationUs) { 2344 mMaxChunkDurationUs = chunkDurationUs; 2345 } 2346 ++nChunks; 2347 if (nChunks == 1 || // First chunk 2348 lastSamplesPerChunk != mChunkSamples.size()) { 2349 lastSamplesPerChunk = mChunkSamples.size(); 2350 addOneStscTableEntry(nChunks, lastSamplesPerChunk); 2351 } 2352 bufferChunk(timestampUs); 2353 chunkTimestampUs = timestampUs; 2354 } 2355 } 2356 } 2357 2358 } 2359 2360 if (isTrackMalFormed()) { 2361 err = ERROR_MALFORMED; 2362 } 2363 2364 mOwner->trackProgressStatus(mTrackId, -1, err); 2365 2366 // Last chunk 2367 if (!hasMultipleTracks) { 2368 addOneStscTableEntry(1, mStszTableEntries->count()); 2369 } else if (!mChunkSamples.empty()) { 2370 addOneStscTableEntry(++nChunks, mChunkSamples.size()); 2371 bufferChunk(timestampUs); 2372 } 2373 2374 // We don't really know how long the last frame lasts, since 2375 // there is no frame time after it, just repeat the previous 2376 // frame's duration. 2377 if (mStszTableEntries->count() == 1) { 2378 lastDurationUs = 0; // A single sample's duration 2379 lastDurationTicks = 0; 2380 } else { 2381 ++sampleCount; // Count for the last sample 2382 } 2383 2384 if (mStszTableEntries->count() <= 2) { 2385 addOneSttsTableEntry(1, lastDurationTicks); 2386 if (sampleCount - 1 > 0) { 2387 addOneSttsTableEntry(sampleCount - 1, lastDurationTicks); 2388 } 2389 } else { 2390 addOneSttsTableEntry(sampleCount, lastDurationTicks); 2391 } 2392 2393 // The last ctts box may not have been written yet, and this 2394 // is to make sure that we write out the last ctts box. 2395 if (currCttsOffsetTimeTicks == lastCttsOffsetTimeTicks) { 2396 if (cttsSampleCount > 0) { 2397 addOneCttsTableEntry(cttsSampleCount, lastCttsOffsetTimeTicks); 2398 } 2399 } 2400 2401 mTrackDurationUs += lastDurationUs; 2402 mReachedEOS = true; 2403 2404 sendTrackSummary(hasMultipleTracks); 2405 2406 ALOGI("Received total/0-length (%d/%d) buffers and encoded %d frames. - %s", 2407 count, nZeroLengthFrames, mStszTableEntries->count(), mIsAudio? "audio": "video"); 2408 if (mIsAudio) { 2409 ALOGI("Audio track drift time: %lld us", mOwner->getDriftTimeUs()); 2410 } 2411 2412 if (err == ERROR_END_OF_STREAM) { 2413 return OK; 2414 } 2415 return err; 2416 } 2417 2418 bool MPEG4Writer::Track::isTrackMalFormed() const { 2419 if (mStszTableEntries->count() == 0) { // no samples written 2420 ALOGE("The number of recorded samples is 0"); 2421 return true; 2422 } 2423 2424 if (!mIsAudio && mStssTableEntries->count() == 0) { // no sync frames for video 2425 ALOGE("There are no sync frames for video track"); 2426 return true; 2427 } 2428 2429 if (OK != checkCodecSpecificData()) { // no codec specific data 2430 return true; 2431 } 2432 2433 return false; 2434 } 2435 2436 void MPEG4Writer::Track::sendTrackSummary(bool hasMultipleTracks) { 2437 2438 // Send track summary only if test mode is enabled. 2439 if (!isTestModeEnabled()) { 2440 return; 2441 } 2442 2443 int trackNum = (mTrackId << 28); 2444 2445 mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2446 trackNum | MEDIA_RECORDER_TRACK_INFO_TYPE, 2447 mIsAudio? 0: 1); 2448 2449 mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2450 trackNum | MEDIA_RECORDER_TRACK_INFO_DURATION_MS, 2451 mTrackDurationUs / 1000); 2452 2453 mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2454 trackNum | MEDIA_RECORDER_TRACK_INFO_ENCODED_FRAMES, 2455 mStszTableEntries->count()); 2456 2457 { 2458 // The system delay time excluding the requested initial delay that 2459 // is used to eliminate the recording sound. 2460 int64_t startTimeOffsetUs = mOwner->getStartTimeOffsetMs() * 1000LL; 2461 if (startTimeOffsetUs < 0) { // Start time offset was not set 2462 startTimeOffsetUs = kInitialDelayTimeUs; 2463 } 2464 int64_t initialDelayUs = 2465 mFirstSampleTimeRealUs - mStartTimeRealUs - startTimeOffsetUs; 2466 2467 mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2468 trackNum | MEDIA_RECORDER_TRACK_INFO_INITIAL_DELAY_MS, 2469 (initialDelayUs) / 1000); 2470 } 2471 2472 mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2473 trackNum | MEDIA_RECORDER_TRACK_INFO_DATA_KBYTES, 2474 mMdatSizeBytes / 1024); 2475 2476 if (hasMultipleTracks) { 2477 mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2478 trackNum | MEDIA_RECORDER_TRACK_INFO_MAX_CHUNK_DUR_MS, 2479 mMaxChunkDurationUs / 1000); 2480 2481 int64_t moovStartTimeUs = mOwner->getStartTimestampUs(); 2482 if (mStartTimestampUs != moovStartTimeUs) { 2483 int64_t startTimeOffsetUs = mStartTimestampUs - moovStartTimeUs; 2484 mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2485 trackNum | MEDIA_RECORDER_TRACK_INFO_START_OFFSET_MS, 2486 startTimeOffsetUs / 1000); 2487 } 2488 } 2489 } 2490 2491 void MPEG4Writer::Track::trackProgressStatus(int64_t timeUs, status_t err) { 2492 ALOGV("trackProgressStatus: %lld us", timeUs); 2493 2494 if (mTrackEveryTimeDurationUs > 0 && 2495 timeUs - mPreviousTrackTimeUs >= mTrackEveryTimeDurationUs) { 2496 ALOGV("Fire time tracking progress status at %lld us", timeUs); 2497 mOwner->trackProgressStatus(mTrackId, timeUs - mPreviousTrackTimeUs, err); 2498 mPreviousTrackTimeUs = timeUs; 2499 } 2500 } 2501 2502 void MPEG4Writer::trackProgressStatus( 2503 size_t trackId, int64_t timeUs, status_t err) { 2504 Mutex::Autolock lock(mLock); 2505 int32_t trackNum = (trackId << 28); 2506 2507 // Error notification 2508 // Do not consider ERROR_END_OF_STREAM an error 2509 if (err != OK && err != ERROR_END_OF_STREAM) { 2510 notify(MEDIA_RECORDER_TRACK_EVENT_ERROR, 2511 trackNum | MEDIA_RECORDER_TRACK_ERROR_GENERAL, 2512 err); 2513 return; 2514 } 2515 2516 if (timeUs == -1) { 2517 // Send completion notification 2518 notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2519 trackNum | MEDIA_RECORDER_TRACK_INFO_COMPLETION_STATUS, 2520 err); 2521 } else { 2522 // Send progress status 2523 notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2524 trackNum | MEDIA_RECORDER_TRACK_INFO_PROGRESS_IN_TIME, 2525 timeUs / 1000); 2526 } 2527 } 2528 2529 void MPEG4Writer::setDriftTimeUs(int64_t driftTimeUs) { 2530 ALOGV("setDriftTimeUs: %lld us", driftTimeUs); 2531 Mutex::Autolock autolock(mLock); 2532 mDriftTimeUs = driftTimeUs; 2533 } 2534 2535 int64_t MPEG4Writer::getDriftTimeUs() { 2536 ALOGV("getDriftTimeUs: %lld us", mDriftTimeUs); 2537 Mutex::Autolock autolock(mLock); 2538 return mDriftTimeUs; 2539 } 2540 2541 bool MPEG4Writer::isRealTimeRecording() const { 2542 return mIsRealTimeRecording; 2543 } 2544 2545 bool MPEG4Writer::useNalLengthFour() { 2546 return mUse4ByteNalLength; 2547 } 2548 2549 void MPEG4Writer::Track::bufferChunk(int64_t timestampUs) { 2550 ALOGV("bufferChunk"); 2551 2552 Chunk chunk(this, timestampUs, mChunkSamples); 2553 mOwner->bufferChunk(chunk); 2554 mChunkSamples.clear(); 2555 } 2556 2557 int64_t MPEG4Writer::Track::getDurationUs() const { 2558 return mTrackDurationUs; 2559 } 2560 2561 int64_t MPEG4Writer::Track::getEstimatedTrackSizeBytes() const { 2562 return mEstimatedTrackSizeBytes; 2563 } 2564 2565 status_t MPEG4Writer::Track::checkCodecSpecificData() const { 2566 const char *mime; 2567 CHECK(mMeta->findCString(kKeyMIMEType, &mime)); 2568 if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AAC, mime) || 2569 !strcasecmp(MEDIA_MIMETYPE_VIDEO_MPEG4, mime) || 2570 !strcasecmp(MEDIA_MIMETYPE_VIDEO_AVC, mime)) { 2571 if (!mCodecSpecificData || 2572 mCodecSpecificDataSize <= 0) { 2573 ALOGE("Missing codec specific data"); 2574 return ERROR_MALFORMED; 2575 } 2576 } else { 2577 if (mCodecSpecificData || 2578 mCodecSpecificDataSize > 0) { 2579 ALOGE("Unexepected codec specific data found"); 2580 return ERROR_MALFORMED; 2581 } 2582 } 2583 return OK; 2584 } 2585 2586 void MPEG4Writer::Track::writeTrackHeader(bool use32BitOffset) { 2587 2588 ALOGV("%s track time scale: %d", 2589 mIsAudio? "Audio": "Video", mTimeScale); 2590 2591 uint32_t now = getMpeg4Time(); 2592 mOwner->beginBox("trak"); 2593 writeTkhdBox(now); 2594 mOwner->beginBox("mdia"); 2595 writeMdhdBox(now); 2596 writeHdlrBox(); 2597 mOwner->beginBox("minf"); 2598 if (mIsAudio) { 2599 writeSmhdBox(); 2600 } else { 2601 writeVmhdBox(); 2602 } 2603 writeDinfBox(); 2604 writeStblBox(use32BitOffset); 2605 mOwner->endBox(); // minf 2606 mOwner->endBox(); // mdia 2607 mOwner->endBox(); // trak 2608 } 2609 2610 void MPEG4Writer::Track::writeStblBox(bool use32BitOffset) { 2611 mOwner->beginBox("stbl"); 2612 mOwner->beginBox("stsd"); 2613 mOwner->writeInt32(0); // version=0, flags=0 2614 mOwner->writeInt32(1); // entry count 2615 if (mIsAudio) { 2616 writeAudioFourCCBox(); 2617 } else { 2618 writeVideoFourCCBox(); 2619 } 2620 mOwner->endBox(); // stsd 2621 writeSttsBox(); 2622 writeCttsBox(); 2623 if (!mIsAudio) { 2624 writeStssBox(); 2625 } 2626 writeStszBox(); 2627 writeStscBox(); 2628 writeStcoBox(use32BitOffset); 2629 mOwner->endBox(); // stbl 2630 } 2631 2632 void MPEG4Writer::Track::writeVideoFourCCBox() { 2633 const char *mime; 2634 bool success = mMeta->findCString(kKeyMIMEType, &mime); 2635 CHECK(success); 2636 if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_MPEG4, mime)) { 2637 mOwner->beginBox("mp4v"); 2638 } else if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_H263, mime)) { 2639 mOwner->beginBox("s263"); 2640 } else if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_AVC, mime)) { 2641 mOwner->beginBox("avc1"); 2642 } else { 2643 ALOGE("Unknown mime type '%s'.", mime); 2644 CHECK(!"should not be here, unknown mime type."); 2645 } 2646 2647 mOwner->writeInt32(0); // reserved 2648 mOwner->writeInt16(0); // reserved 2649 mOwner->writeInt16(1); // data ref index 2650 mOwner->writeInt16(0); // predefined 2651 mOwner->writeInt16(0); // reserved 2652 mOwner->writeInt32(0); // predefined 2653 mOwner->writeInt32(0); // predefined 2654 mOwner->writeInt32(0); // predefined 2655 2656 int32_t width, height; 2657 success = mMeta->findInt32(kKeyWidth, &width); 2658 success = success && mMeta->findInt32(kKeyHeight, &height); 2659 CHECK(success); 2660 2661 mOwner->writeInt16(width); 2662 mOwner->writeInt16(height); 2663 mOwner->writeInt32(0x480000); // horiz resolution 2664 mOwner->writeInt32(0x480000); // vert resolution 2665 mOwner->writeInt32(0); // reserved 2666 mOwner->writeInt16(1); // frame count 2667 mOwner->writeInt8(0); // compressor string length 2668 mOwner->write(" ", 31); 2669 mOwner->writeInt16(0x18); // depth 2670 mOwner->writeInt16(-1); // predefined 2671 2672 CHECK_LT(23 + mCodecSpecificDataSize, 128); 2673 2674 if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_MPEG4, mime)) { 2675 writeMp4vEsdsBox(); 2676 } else if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_H263, mime)) { 2677 writeD263Box(); 2678 } else if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_AVC, mime)) { 2679 writeAvccBox(); 2680 } 2681 2682 writePaspBox(); 2683 mOwner->endBox(); // mp4v, s263 or avc1 2684 } 2685 2686 void MPEG4Writer::Track::writeAudioFourCCBox() { 2687 const char *mime; 2688 bool success = mMeta->findCString(kKeyMIMEType, &mime); 2689 CHECK(success); 2690 const char *fourcc = NULL; 2691 if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AMR_NB, mime)) { 2692 fourcc = "samr"; 2693 } else if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AMR_WB, mime)) { 2694 fourcc = "sawb"; 2695 } else if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AAC, mime)) { 2696 fourcc = "mp4a"; 2697 } else { 2698 ALOGE("Unknown mime type '%s'.", mime); 2699 CHECK(!"should not be here, unknown mime type."); 2700 } 2701 2702 mOwner->beginBox(fourcc); // audio format 2703 mOwner->writeInt32(0); // reserved 2704 mOwner->writeInt16(0); // reserved 2705 mOwner->writeInt16(0x1); // data ref index 2706 mOwner->writeInt32(0); // reserved 2707 mOwner->writeInt32(0); // reserved 2708 int32_t nChannels; 2709 CHECK_EQ(true, mMeta->findInt32(kKeyChannelCount, &nChannels)); 2710 mOwner->writeInt16(nChannels); // channel count 2711 mOwner->writeInt16(16); // sample size 2712 mOwner->writeInt16(0); // predefined 2713 mOwner->writeInt16(0); // reserved 2714 2715 int32_t samplerate; 2716 success = mMeta->findInt32(kKeySampleRate, &samplerate); 2717 CHECK(success); 2718 mOwner->writeInt32(samplerate << 16); 2719 if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AAC, mime)) { 2720 writeMp4aEsdsBox(); 2721 } else if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AMR_NB, mime) || 2722 !strcasecmp(MEDIA_MIMETYPE_AUDIO_AMR_WB, mime)) { 2723 writeDamrBox(); 2724 } 2725 mOwner->endBox(); 2726 } 2727 2728 void MPEG4Writer::Track::writeMp4aEsdsBox() { 2729 mOwner->beginBox("esds"); 2730 CHECK(mCodecSpecificData); 2731 CHECK_GT(mCodecSpecificDataSize, 0); 2732 2733 // Make sure all sizes encode to a single byte. 2734 CHECK_LT(mCodecSpecificDataSize + 23, 128); 2735 2736 mOwner->writeInt32(0); // version=0, flags=0 2737 mOwner->writeInt8(0x03); // ES_DescrTag 2738 mOwner->writeInt8(23 + mCodecSpecificDataSize); 2739 mOwner->writeInt16(0x0000);// ES_ID 2740 mOwner->writeInt8(0x00); 2741 2742 mOwner->writeInt8(0x04); // DecoderConfigDescrTag 2743 mOwner->writeInt8(15 + mCodecSpecificDataSize); 2744 mOwner->writeInt8(0x40); // objectTypeIndication ISO/IEC 14492-2 2745 mOwner->writeInt8(0x15); // streamType AudioStream 2746 2747 mOwner->writeInt16(0x03); // XXX 2748 mOwner->writeInt8(0x00); // buffer size 24-bit 2749 mOwner->writeInt32(96000); // max bit rate 2750 mOwner->writeInt32(96000); // avg bit rate 2751 2752 mOwner->writeInt8(0x05); // DecoderSpecificInfoTag 2753 mOwner->writeInt8(mCodecSpecificDataSize); 2754 mOwner->write(mCodecSpecificData, mCodecSpecificDataSize); 2755 2756 static const uint8_t kData2[] = { 2757 0x06, // SLConfigDescriptorTag 2758 0x01, 2759 0x02 2760 }; 2761 mOwner->write(kData2, sizeof(kData2)); 2762 2763 mOwner->endBox(); // esds 2764 } 2765 2766 void MPEG4Writer::Track::writeMp4vEsdsBox() { 2767 CHECK(mCodecSpecificData); 2768 CHECK_GT(mCodecSpecificDataSize, 0); 2769 mOwner->beginBox("esds"); 2770 2771 mOwner->writeInt32(0); // version=0, flags=0 2772 2773 mOwner->writeInt8(0x03); // ES_DescrTag 2774 mOwner->writeInt8(23 + mCodecSpecificDataSize); 2775 mOwner->writeInt16(0x0000); // ES_ID 2776 mOwner->writeInt8(0x1f); 2777 2778 mOwner->writeInt8(0x04); // DecoderConfigDescrTag 2779 mOwner->writeInt8(15 + mCodecSpecificDataSize); 2780 mOwner->writeInt8(0x20); // objectTypeIndication ISO/IEC 14492-2 2781 mOwner->writeInt8(0x11); // streamType VisualStream 2782 2783 static const uint8_t kData[] = { 2784 0x01, 0x77, 0x00, 2785 0x00, 0x03, 0xe8, 0x00, 2786 0x00, 0x03, 0xe8, 0x00 2787 }; 2788 mOwner->write(kData, sizeof(kData)); 2789 2790 mOwner->writeInt8(0x05); // DecoderSpecificInfoTag 2791 2792 mOwner->writeInt8(mCodecSpecificDataSize); 2793 mOwner->write(mCodecSpecificData, mCodecSpecificDataSize); 2794 2795 static const uint8_t kData2[] = { 2796 0x06, // SLConfigDescriptorTag 2797 0x01, 2798 0x02 2799 }; 2800 mOwner->write(kData2, sizeof(kData2)); 2801 2802 mOwner->endBox(); // esds 2803 } 2804 2805 void MPEG4Writer::Track::writeTkhdBox(uint32_t now) { 2806 mOwner->beginBox("tkhd"); 2807 // Flags = 7 to indicate that the track is enabled, and 2808 // part of the presentation 2809 mOwner->writeInt32(0x07); // version=0, flags=7 2810 mOwner->writeInt32(now); // creation time 2811 mOwner->writeInt32(now); // modification time 2812 mOwner->writeInt32(mTrackId); // track id starts with 1 2813 mOwner->writeInt32(0); // reserved 2814 int64_t trakDurationUs = getDurationUs(); 2815 int32_t mvhdTimeScale = mOwner->getTimeScale(); 2816 int32_t tkhdDuration = 2817 (trakDurationUs * mvhdTimeScale + 5E5) / 1E6; 2818 mOwner->writeInt32(tkhdDuration); // in mvhd timescale 2819 mOwner->writeInt32(0); // reserved 2820 mOwner->writeInt32(0); // reserved 2821 mOwner->writeInt16(0); // layer 2822 mOwner->writeInt16(0); // alternate group 2823 mOwner->writeInt16(mIsAudio ? 0x100 : 0); // volume 2824 mOwner->writeInt16(0); // reserved 2825 2826 mOwner->writeCompositionMatrix(mRotation); // matrix 2827 2828 if (mIsAudio) { 2829 mOwner->writeInt32(0); 2830 mOwner->writeInt32(0); 2831 } else { 2832 int32_t width, height; 2833 bool success = mMeta->findInt32(kKeyWidth, &width); 2834 success = success && mMeta->findInt32(kKeyHeight, &height); 2835 CHECK(success); 2836 2837 mOwner->writeInt32(width << 16); // 32-bit fixed-point value 2838 mOwner->writeInt32(height << 16); // 32-bit fixed-point value 2839 } 2840 mOwner->endBox(); // tkhd 2841 } 2842 2843 void MPEG4Writer::Track::writeVmhdBox() { 2844 mOwner->beginBox("vmhd"); 2845 mOwner->writeInt32(0x01); // version=0, flags=1 2846 mOwner->writeInt16(0); // graphics mode 2847 mOwner->writeInt16(0); // opcolor 2848 mOwner->writeInt16(0); 2849 mOwner->writeInt16(0); 2850 mOwner->endBox(); 2851 } 2852 2853 void MPEG4Writer::Track::writeSmhdBox() { 2854 mOwner->beginBox("smhd"); 2855 mOwner->writeInt32(0); // version=0, flags=0 2856 mOwner->writeInt16(0); // balance 2857 mOwner->writeInt16(0); // reserved 2858 mOwner->endBox(); 2859 } 2860 2861 void MPEG4Writer::Track::writeHdlrBox() { 2862 mOwner->beginBox("hdlr"); 2863 mOwner->writeInt32(0); // version=0, flags=0 2864 mOwner->writeInt32(0); // component type: should be mhlr 2865 mOwner->writeFourcc(mIsAudio ? "soun" : "vide"); // component subtype 2866 mOwner->writeInt32(0); // reserved 2867 mOwner->writeInt32(0); // reserved 2868 mOwner->writeInt32(0); // reserved 2869 // Removing "r" for the name string just makes the string 4 byte aligned 2870 mOwner->writeCString(mIsAudio ? "SoundHandle": "VideoHandle"); // name 2871 mOwner->endBox(); 2872 } 2873 2874 void MPEG4Writer::Track::writeMdhdBox(uint32_t now) { 2875 int64_t trakDurationUs = getDurationUs(); 2876 mOwner->beginBox("mdhd"); 2877 mOwner->writeInt32(0); // version=0, flags=0 2878 mOwner->writeInt32(now); // creation time 2879 mOwner->writeInt32(now); // modification time 2880 mOwner->writeInt32(mTimeScale); // media timescale 2881 int32_t mdhdDuration = (trakDurationUs * mTimeScale + 5E5) / 1E6; 2882 mOwner->writeInt32(mdhdDuration); // use media timescale 2883 // Language follows the three letter standard ISO-639-2/T 2884 // 'e', 'n', 'g' for "English", for instance. 2885 // Each character is packed as the difference between its ASCII value and 0x60. 2886 // For "English", these are 00101, 01110, 00111. 2887 // XXX: Where is the padding bit located: 0x15C7? 2888 mOwner->writeInt16(0); // language code 2889 mOwner->writeInt16(0); // predefined 2890 mOwner->endBox(); 2891 } 2892 2893 void MPEG4Writer::Track::writeDamrBox() { 2894 // 3gpp2 Spec AMRSampleEntry fields 2895 mOwner->beginBox("damr"); 2896 mOwner->writeCString(" "); // vendor: 4 bytes 2897 mOwner->writeInt8(0); // decoder version 2898 mOwner->writeInt16(0x83FF); // mode set: all enabled 2899 mOwner->writeInt8(0); // mode change period 2900 mOwner->writeInt8(1); // frames per sample 2901 mOwner->endBox(); 2902 } 2903 2904 void MPEG4Writer::Track::writeUrlBox() { 2905 // The table index here refers to the sample description index 2906 // in the sample table entries. 2907 mOwner->beginBox("url "); 2908 mOwner->writeInt32(1); // version=0, flags=1 (self-contained) 2909 mOwner->endBox(); // url 2910 } 2911 2912 void MPEG4Writer::Track::writeDrefBox() { 2913 mOwner->beginBox("dref"); 2914 mOwner->writeInt32(0); // version=0, flags=0 2915 mOwner->writeInt32(1); // entry count (either url or urn) 2916 writeUrlBox(); 2917 mOwner->endBox(); // dref 2918 } 2919 2920 void MPEG4Writer::Track::writeDinfBox() { 2921 mOwner->beginBox("dinf"); 2922 writeDrefBox(); 2923 mOwner->endBox(); // dinf 2924 } 2925 2926 void MPEG4Writer::Track::writeAvccBox() { 2927 CHECK(mCodecSpecificData); 2928 CHECK_GE(mCodecSpecificDataSize, 5); 2929 2930 // Patch avcc's lengthSize field to match the number 2931 // of bytes we use to indicate the size of a nal unit. 2932 uint8_t *ptr = (uint8_t *)mCodecSpecificData; 2933 ptr[4] = (ptr[4] & 0xfc) | (mOwner->useNalLengthFour() ? 3 : 1); 2934 mOwner->beginBox("avcC"); 2935 mOwner->write(mCodecSpecificData, mCodecSpecificDataSize); 2936 mOwner->endBox(); // avcC 2937 } 2938 2939 void MPEG4Writer::Track::writeD263Box() { 2940 mOwner->beginBox("d263"); 2941 mOwner->writeInt32(0); // vendor 2942 mOwner->writeInt8(0); // decoder version 2943 mOwner->writeInt8(10); // level: 10 2944 mOwner->writeInt8(0); // profile: 0 2945 mOwner->endBox(); // d263 2946 } 2947 2948 // This is useful if the pixel is not square 2949 void MPEG4Writer::Track::writePaspBox() { 2950 mOwner->beginBox("pasp"); 2951 mOwner->writeInt32(1 << 16); // hspacing 2952 mOwner->writeInt32(1 << 16); // vspacing 2953 mOwner->endBox(); // pasp 2954 } 2955 2956 int32_t MPEG4Writer::Track::getStartTimeOffsetScaledTime() const { 2957 int64_t trackStartTimeOffsetUs = 0; 2958 int64_t moovStartTimeUs = mOwner->getStartTimestampUs(); 2959 if (mStartTimestampUs != moovStartTimeUs) { 2960 CHECK_GT(mStartTimestampUs, moovStartTimeUs); 2961 trackStartTimeOffsetUs = mStartTimestampUs - moovStartTimeUs; 2962 } 2963 return (trackStartTimeOffsetUs * mTimeScale + 500000LL) / 1000000LL; 2964 } 2965 2966 void MPEG4Writer::Track::writeSttsBox() { 2967 mOwner->beginBox("stts"); 2968 mOwner->writeInt32(0); // version=0, flags=0 2969 uint32_t duration; 2970 CHECK(mSttsTableEntries->get(duration, 1)); 2971 duration = htonl(duration); // Back to host byte order 2972 mSttsTableEntries->set(htonl(duration + getStartTimeOffsetScaledTime()), 1); 2973 mSttsTableEntries->write(mOwner); 2974 mOwner->endBox(); // stts 2975 } 2976 2977 void MPEG4Writer::Track::writeCttsBox() { 2978 if (mIsAudio) { // ctts is not for audio 2979 return; 2980 } 2981 2982 // There is no B frame at all 2983 if (mMinCttsOffsetTimeUs == mMaxCttsOffsetTimeUs) { 2984 return; 2985 } 2986 2987 // Do not write ctts box when there is no need to have it. 2988 if (mCttsTableEntries->count() == 0) { 2989 return; 2990 } 2991 2992 ALOGV("ctts box has %d entries with range [%lld, %lld]", 2993 mCttsTableEntries->count(), mMinCttsOffsetTimeUs, mMaxCttsOffsetTimeUs); 2994 2995 mOwner->beginBox("ctts"); 2996 mOwner->writeInt32(0); // version=0, flags=0 2997 uint32_t duration; 2998 CHECK(mCttsTableEntries->get(duration, 1)); 2999 duration = htonl(duration); // Back host byte order 3000 mCttsTableEntries->set(htonl(duration + getStartTimeOffsetScaledTime() - mMinCttsOffsetTimeUs), 1); 3001 mCttsTableEntries->write(mOwner); 3002 mOwner->endBox(); // ctts 3003 } 3004 3005 void MPEG4Writer::Track::writeStssBox() { 3006 mOwner->beginBox("stss"); 3007 mOwner->writeInt32(0); // version=0, flags=0 3008 mStssTableEntries->write(mOwner); 3009 mOwner->endBox(); // stss 3010 } 3011 3012 void MPEG4Writer::Track::writeStszBox() { 3013 mOwner->beginBox("stsz"); 3014 mOwner->writeInt32(0); // version=0, flags=0 3015 mOwner->writeInt32(0); 3016 mStszTableEntries->write(mOwner); 3017 mOwner->endBox(); // stsz 3018 } 3019 3020 void MPEG4Writer::Track::writeStscBox() { 3021 mOwner->beginBox("stsc"); 3022 mOwner->writeInt32(0); // version=0, flags=0 3023 mStscTableEntries->write(mOwner); 3024 mOwner->endBox(); // stsc 3025 } 3026 3027 void MPEG4Writer::Track::writeStcoBox(bool use32BitOffset) { 3028 mOwner->beginBox(use32BitOffset? "stco": "co64"); 3029 mOwner->writeInt32(0); // version=0, flags=0 3030 if (use32BitOffset) { 3031 mStcoTableEntries->write(mOwner); 3032 } else { 3033 mCo64TableEntries->write(mOwner); 3034 } 3035 mOwner->endBox(); // stco or co64 3036 } 3037 3038 void MPEG4Writer::writeUdtaBox() { 3039 beginBox("udta"); 3040 writeGeoDataBox(); 3041 endBox(); 3042 } 3043 3044 /* 3045 * Geodata is stored according to ISO-6709 standard. 3046 */ 3047 void MPEG4Writer::writeGeoDataBox() { 3048 beginBox("\xA9xyz"); 3049 /* 3050 * For historical reasons, any user data start 3051 * with "\0xA9", must be followed by its assoicated 3052 * language code. 3053 * 0x0012: text string length 3054 * 0x15c7: lang (locale) code: en 3055 */ 3056 writeInt32(0x001215c7); 3057 writeLatitude(mLatitudex10000); 3058 writeLongitude(mLongitudex10000); 3059 writeInt8(0x2F); 3060 endBox(); 3061 } 3062 3063 } // namespace android 3064
