MPEG4Writer.cpp revision 11f15ddbca475b5f6a3d7970b22234e04c595b37
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 <inttypes.h> 20#include <utils/Log.h> 21 22#include <arpa/inet.h> 23 24#include <pthread.h> 25#include <sys/prctl.h> 26 27#include <media/stagefright/foundation/ADebug.h> 28#include <media/stagefright/MPEG4Writer.h> 29#include <media/stagefright/MediaBuffer.h> 30#include <media/stagefright/MetaData.h> 31#include <media/stagefright/MediaDefs.h> 32#include <media/stagefright/MediaErrors.h> 33#include <media/stagefright/MediaSource.h> 34#include <media/stagefright/Utils.h> 35#include <media/mediarecorder.h> 36#include <cutils/properties.h> 37#include <sys/types.h> 38#include <sys/stat.h> 39#include <fcntl.h> 40#include <unistd.h> 41 42#include "include/ESDS.h" 43 44#define WARN_UNLESS(condition, message, ...) \ 45( (CONDITION(condition)) ? false : ({ \ 46 ALOGW("Condition %s failed " message, #condition, ##__VA_ARGS__); \ 47 true; \ 48})) 49 50namespace android { 51 52static const int64_t kMinStreamableFileSizeInBytes = 5 * 1024 * 1024; 53static const int64_t kMax32BitFileSize = 0x00ffffffffLL; // 2^32-1 : max FAT32 54 // filesystem file size 55 // used by most SD cards 56static const uint8_t kNalUnitTypeSeqParamSet = 0x07; 57static const uint8_t kNalUnitTypePicParamSet = 0x08; 58static const int64_t kInitialDelayTimeUs = 700000LL; 59 60class MPEG4Writer::Track { 61public: 62 Track(MPEG4Writer *owner, const sp<MediaSource> &source, size_t trackId); 63 64 ~Track(); 65 66 status_t start(MetaData *params); 67 status_t stop(); 68 status_t pause(); 69 bool reachedEOS(); 70 71 int64_t getDurationUs() const; 72 int64_t getEstimatedTrackSizeBytes() const; 73 void writeTrackHeader(bool use32BitOffset = true); 74 void bufferChunk(int64_t timestampUs); 75 bool isAvc() const { return mIsAvc; } 76 bool isAudio() const { return mIsAudio; } 77 bool isMPEG4() const { return mIsMPEG4; } 78 void addChunkOffset(off64_t offset); 79 int32_t getTrackId() const { return mTrackId; } 80 status_t dump(int fd, const Vector<String16>& args) const; 81 82private: 83 enum { 84 kMaxCttsOffsetTimeUs = 1000000LL, // 1 second 85 kSampleArraySize = 1000, 86 }; 87 88 // A helper class to handle faster write box with table entries 89 template<class TYPE> 90 struct ListTableEntries { 91 ListTableEntries(uint32_t elementCapacity, uint32_t entryCapacity) 92 : mElementCapacity(elementCapacity), 93 mEntryCapacity(entryCapacity), 94 mTotalNumTableEntries(0), 95 mNumValuesInCurrEntry(0), 96 mCurrTableEntriesElement(NULL) { 97 CHECK_GT(mElementCapacity, 0); 98 CHECK_GT(mEntryCapacity, 0); 99 } 100 101 // Free the allocated memory. 102 ~ListTableEntries() { 103 while (!mTableEntryList.empty()) { 104 typename List<TYPE *>::iterator it = mTableEntryList.begin(); 105 delete[] (*it); 106 mTableEntryList.erase(it); 107 } 108 } 109 110 // Replace the value at the given position by the given value. 111 // There must be an existing value at the given position. 112 // @arg value must be in network byte order 113 // @arg pos location the value must be in. 114 void set(const TYPE& value, uint32_t pos) { 115 CHECK_LT(pos, mTotalNumTableEntries * mEntryCapacity); 116 117 typename List<TYPE *>::iterator it = mTableEntryList.begin(); 118 uint32_t iterations = (pos / (mElementCapacity * mEntryCapacity)); 119 while (it != mTableEntryList.end() && iterations > 0) { 120 ++it; 121 --iterations; 122 } 123 CHECK(it != mTableEntryList.end()); 124 CHECK_EQ(iterations, 0); 125 126 (*it)[(pos % (mElementCapacity * mEntryCapacity))] = value; 127 } 128 129 // Get the value at the given position by the given value. 130 // @arg value the retrieved value at the position in network byte order. 131 // @arg pos location the value must be in. 132 // @return true if a value is found. 133 bool get(TYPE& value, uint32_t pos) const { 134 if (pos >= mTotalNumTableEntries * mEntryCapacity) { 135 return false; 136 } 137 138 typename List<TYPE *>::iterator it = mTableEntryList.begin(); 139 uint32_t iterations = (pos / (mElementCapacity * mEntryCapacity)); 140 while (it != mTableEntryList.end() && iterations > 0) { 141 ++it; 142 --iterations; 143 } 144 CHECK(it != mTableEntryList.end()); 145 CHECK_EQ(iterations, 0); 146 147 value = (*it)[(pos % (mElementCapacity * mEntryCapacity))]; 148 return true; 149 } 150 151 // Store a single value. 152 // @arg value must be in network byte order. 153 void add(const TYPE& value) { 154 CHECK_LT(mNumValuesInCurrEntry, mElementCapacity); 155 uint32_t nEntries = mTotalNumTableEntries % mElementCapacity; 156 uint32_t nValues = mNumValuesInCurrEntry % mEntryCapacity; 157 if (nEntries == 0 && nValues == 0) { 158 mCurrTableEntriesElement = new TYPE[mEntryCapacity * mElementCapacity]; 159 CHECK(mCurrTableEntriesElement != NULL); 160 mTableEntryList.push_back(mCurrTableEntriesElement); 161 } 162 163 uint32_t pos = nEntries * mEntryCapacity + nValues; 164 mCurrTableEntriesElement[pos] = value; 165 166 ++mNumValuesInCurrEntry; 167 if ((mNumValuesInCurrEntry % mEntryCapacity) == 0) { 168 ++mTotalNumTableEntries; 169 mNumValuesInCurrEntry = 0; 170 } 171 } 172 173 // Write out the table entries: 174 // 1. the number of entries goes first 175 // 2. followed by the values in the table enties in order 176 // @arg writer the writer to actual write to the storage 177 void write(MPEG4Writer *writer) const { 178 CHECK_EQ(mNumValuesInCurrEntry % mEntryCapacity, 0); 179 uint32_t nEntries = mTotalNumTableEntries; 180 writer->writeInt32(nEntries); 181 for (typename List<TYPE *>::iterator it = mTableEntryList.begin(); 182 it != mTableEntryList.end(); ++it) { 183 CHECK_GT(nEntries, 0); 184 if (nEntries >= mElementCapacity) { 185 writer->write(*it, sizeof(TYPE) * mEntryCapacity, mElementCapacity); 186 nEntries -= mElementCapacity; 187 } else { 188 writer->write(*it, sizeof(TYPE) * mEntryCapacity, nEntries); 189 break; 190 } 191 } 192 } 193 194 // Return the number of entries in the table. 195 uint32_t count() const { return mTotalNumTableEntries; } 196 197 private: 198 uint32_t mElementCapacity; // # entries in an element 199 uint32_t mEntryCapacity; // # of values in each entry 200 uint32_t mTotalNumTableEntries; 201 uint32_t mNumValuesInCurrEntry; // up to mEntryCapacity 202 TYPE *mCurrTableEntriesElement; 203 mutable List<TYPE *> mTableEntryList; 204 205 DISALLOW_EVIL_CONSTRUCTORS(ListTableEntries); 206 }; 207 208 209 210 MPEG4Writer *mOwner; 211 sp<MetaData> mMeta; 212 sp<MediaSource> mSource; 213 volatile bool mDone; 214 volatile bool mPaused; 215 volatile bool mResumed; 216 volatile bool mStarted; 217 bool mIsAvc; 218 bool mIsAudio; 219 bool mIsMPEG4; 220 int32_t mTrackId; 221 int64_t mTrackDurationUs; 222 int64_t mMaxChunkDurationUs; 223 224 int64_t mEstimatedTrackSizeBytes; 225 int64_t mMdatSizeBytes; 226 int32_t mTimeScale; 227 228 pthread_t mThread; 229 230 231 List<MediaBuffer *> mChunkSamples; 232 233 bool mSamplesHaveSameSize; 234 ListTableEntries<uint32_t> *mStszTableEntries; 235 236 ListTableEntries<uint32_t> *mStcoTableEntries; 237 ListTableEntries<off64_t> *mCo64TableEntries; 238 ListTableEntries<uint32_t> *mStscTableEntries; 239 ListTableEntries<uint32_t> *mStssTableEntries; 240 ListTableEntries<uint32_t> *mSttsTableEntries; 241 ListTableEntries<uint32_t> *mCttsTableEntries; 242 243 int64_t mMinCttsOffsetTimeUs; 244 int64_t mMaxCttsOffsetTimeUs; 245 246 // Sequence parameter set or picture parameter set 247 struct AVCParamSet { 248 AVCParamSet(uint16_t length, const uint8_t *data) 249 : mLength(length), mData(data) {} 250 251 uint16_t mLength; 252 const uint8_t *mData; 253 }; 254 List<AVCParamSet> mSeqParamSets; 255 List<AVCParamSet> mPicParamSets; 256 uint8_t mProfileIdc; 257 uint8_t mProfileCompatible; 258 uint8_t mLevelIdc; 259 260 void *mCodecSpecificData; 261 size_t mCodecSpecificDataSize; 262 bool mGotAllCodecSpecificData; 263 bool mTrackingProgressStatus; 264 265 bool mReachedEOS; 266 int64_t mStartTimestampUs; 267 int64_t mStartTimeRealUs; 268 int64_t mFirstSampleTimeRealUs; 269 int64_t mPreviousTrackTimeUs; 270 int64_t mTrackEveryTimeDurationUs; 271 272 // Update the audio track's drift information. 273 void updateDriftTime(const sp<MetaData>& meta); 274 275 int32_t getStartTimeOffsetScaledTime() const; 276 277 static void *ThreadWrapper(void *me); 278 status_t threadEntry(); 279 280 const uint8_t *parseParamSet( 281 const uint8_t *data, size_t length, int type, size_t *paramSetLen); 282 283 status_t makeAVCCodecSpecificData(const uint8_t *data, size_t size); 284 status_t copyAVCCodecSpecificData(const uint8_t *data, size_t size); 285 status_t parseAVCCodecSpecificData(const uint8_t *data, size_t size); 286 287 // Track authoring progress status 288 void trackProgressStatus(int64_t timeUs, status_t err = OK); 289 void initTrackingProgressStatus(MetaData *params); 290 291 void getCodecSpecificDataFromInputFormatIfPossible(); 292 293 // Determine the track time scale 294 // If it is an audio track, try to use the sampling rate as 295 // the time scale; however, if user chooses the overwrite 296 // value, the user-supplied time scale will be used. 297 void setTimeScale(); 298 299 // Simple validation on the codec specific data 300 status_t checkCodecSpecificData() const; 301 int32_t mRotation; 302 303 void updateTrackSizeEstimate(); 304 void addOneStscTableEntry(size_t chunkId, size_t sampleId); 305 void addOneStssTableEntry(size_t sampleId); 306 307 // Duration is time scale based 308 void addOneSttsTableEntry(size_t sampleCount, int32_t timescaledDur); 309 void addOneCttsTableEntry(size_t sampleCount, int32_t timescaledDur); 310 311 bool isTrackMalFormed() const; 312 void sendTrackSummary(bool hasMultipleTracks); 313 314 // Write the boxes 315 void writeStcoBox(bool use32BitOffset); 316 void writeStscBox(); 317 void writeStszBox(); 318 void writeStssBox(); 319 void writeSttsBox(); 320 void writeCttsBox(); 321 void writeD263Box(); 322 void writePaspBox(); 323 void writeAvccBox(); 324 void writeUrlBox(); 325 void writeDrefBox(); 326 void writeDinfBox(); 327 void writeDamrBox(); 328 void writeMdhdBox(uint32_t now); 329 void writeSmhdBox(); 330 void writeVmhdBox(); 331 void writeHdlrBox(); 332 void writeTkhdBox(uint32_t now); 333 void writeMp4aEsdsBox(); 334 void writeMp4vEsdsBox(); 335 void writeAudioFourCCBox(); 336 void writeVideoFourCCBox(); 337 void writeStblBox(bool use32BitOffset); 338 339 Track(const Track &); 340 Track &operator=(const Track &); 341}; 342 343MPEG4Writer::MPEG4Writer(const char *filename) 344 : mFd(-1), 345 mInitCheck(NO_INIT), 346 mIsRealTimeRecording(true), 347 mUse4ByteNalLength(true), 348 mUse32BitOffset(true), 349 mIsFileSizeLimitExplicitlyRequested(false), 350 mPaused(false), 351 mStarted(false), 352 mWriterThreadStarted(false), 353 mOffset(0), 354 mMdatOffset(0), 355 mEstimatedMoovBoxSize(0), 356 mInterleaveDurationUs(1000000), 357 mLatitudex10000(0), 358 mLongitudex10000(0), 359 mAreGeoTagsAvailable(false), 360 mStartTimeOffsetMs(-1) { 361 362 mFd = open(filename, O_CREAT | O_LARGEFILE | O_TRUNC | O_RDWR, S_IRUSR | S_IWUSR); 363 if (mFd >= 0) { 364 mInitCheck = OK; 365 } 366} 367 368MPEG4Writer::MPEG4Writer(int fd) 369 : mFd(dup(fd)), 370 mInitCheck(mFd < 0? NO_INIT: OK), 371 mIsRealTimeRecording(true), 372 mUse4ByteNalLength(true), 373 mUse32BitOffset(true), 374 mIsFileSizeLimitExplicitlyRequested(false), 375 mPaused(false), 376 mStarted(false), 377 mWriterThreadStarted(false), 378 mOffset(0), 379 mMdatOffset(0), 380 mEstimatedMoovBoxSize(0), 381 mInterleaveDurationUs(1000000), 382 mLatitudex10000(0), 383 mLongitudex10000(0), 384 mAreGeoTagsAvailable(false), 385 mStartTimeOffsetMs(-1) { 386} 387 388MPEG4Writer::~MPEG4Writer() { 389 reset(); 390 391 while (!mTracks.empty()) { 392 List<Track *>::iterator it = mTracks.begin(); 393 delete *it; 394 (*it) = NULL; 395 mTracks.erase(it); 396 } 397 mTracks.clear(); 398} 399 400status_t MPEG4Writer::dump( 401 int fd, const Vector<String16>& args) { 402 const size_t SIZE = 256; 403 char buffer[SIZE]; 404 String8 result; 405 snprintf(buffer, SIZE, " MPEG4Writer %p\n", this); 406 result.append(buffer); 407 snprintf(buffer, SIZE, " mStarted: %s\n", mStarted? "true": "false"); 408 result.append(buffer); 409 ::write(fd, result.string(), result.size()); 410 for (List<Track *>::iterator it = mTracks.begin(); 411 it != mTracks.end(); ++it) { 412 (*it)->dump(fd, args); 413 } 414 return OK; 415} 416 417status_t MPEG4Writer::Track::dump( 418 int fd, const Vector<String16>& /* args */) const { 419 const size_t SIZE = 256; 420 char buffer[SIZE]; 421 String8 result; 422 snprintf(buffer, SIZE, " %s track\n", mIsAudio? "Audio": "Video"); 423 result.append(buffer); 424 snprintf(buffer, SIZE, " reached EOS: %s\n", 425 mReachedEOS? "true": "false"); 426 result.append(buffer); 427 snprintf(buffer, SIZE, " frames encoded : %d\n", mStszTableEntries->count()); 428 result.append(buffer); 429 snprintf(buffer, SIZE, " duration encoded : %" PRId64 " us\n", mTrackDurationUs); 430 result.append(buffer); 431 ::write(fd, result.string(), result.size()); 432 return OK; 433} 434 435status_t MPEG4Writer::addSource(const sp<MediaSource> &source) { 436 Mutex::Autolock l(mLock); 437 if (mStarted) { 438 ALOGE("Attempt to add source AFTER recording is started"); 439 return UNKNOWN_ERROR; 440 } 441 442 // At most 2 tracks can be supported. 443 if (mTracks.size() >= 2) { 444 ALOGE("Too many tracks (%d) to add", mTracks.size()); 445 return ERROR_UNSUPPORTED; 446 } 447 448 CHECK(source.get() != NULL); 449 450 // A track of type other than video or audio is not supported. 451 const char *mime; 452 source->getFormat()->findCString(kKeyMIMEType, &mime); 453 bool isAudio = !strncasecmp(mime, "audio/", 6); 454 bool isVideo = !strncasecmp(mime, "video/", 6); 455 if (!isAudio && !isVideo) { 456 ALOGE("Track (%s) other than video or audio is not supported", 457 mime); 458 return ERROR_UNSUPPORTED; 459 } 460 461 // At this point, we know the track to be added is either 462 // video or audio. Thus, we only need to check whether it 463 // is an audio track or not (if it is not, then it must be 464 // a video track). 465 466 // No more than one video or one audio track is supported. 467 for (List<Track*>::iterator it = mTracks.begin(); 468 it != mTracks.end(); ++it) { 469 if ((*it)->isAudio() == isAudio) { 470 ALOGE("%s track already exists", isAudio? "Audio": "Video"); 471 return ERROR_UNSUPPORTED; 472 } 473 } 474 475 // This is the first track of either audio or video. 476 // Go ahead to add the track. 477 Track *track = new Track(this, source, 1 + mTracks.size()); 478 mTracks.push_back(track); 479 480 return OK; 481} 482 483status_t MPEG4Writer::startTracks(MetaData *params) { 484 if (mTracks.empty()) { 485 ALOGE("No source added"); 486 return INVALID_OPERATION; 487 } 488 489 for (List<Track *>::iterator it = mTracks.begin(); 490 it != mTracks.end(); ++it) { 491 status_t err = (*it)->start(params); 492 493 if (err != OK) { 494 for (List<Track *>::iterator it2 = mTracks.begin(); 495 it2 != it; ++it2) { 496 (*it2)->stop(); 497 } 498 499 return err; 500 } 501 } 502 return OK; 503} 504 505int64_t MPEG4Writer::estimateMoovBoxSize(int32_t bitRate) { 506 // This implementation is highly experimental/heurisitic. 507 // 508 // Statistical analysis shows that metadata usually accounts 509 // for a small portion of the total file size, usually < 0.6%. 510 511 // The default MIN_MOOV_BOX_SIZE is set to 0.6% x 1MB / 2, 512 // where 1MB is the common file size limit for MMS application. 513 // The default MAX _MOOV_BOX_SIZE value is based on about 3 514 // minute video recording with a bit rate about 3 Mbps, because 515 // statistics also show that most of the video captured are going 516 // to be less than 3 minutes. 517 518 // If the estimation is wrong, we will pay the price of wasting 519 // some reserved space. This should not happen so often statistically. 520 static const int32_t factor = mUse32BitOffset? 1: 2; 521 static const int64_t MIN_MOOV_BOX_SIZE = 3 * 1024; // 3 KB 522 static const int64_t MAX_MOOV_BOX_SIZE = (180 * 3000000 * 6LL / 8000); 523 int64_t size = MIN_MOOV_BOX_SIZE; 524 525 // Max file size limit is set 526 if (mMaxFileSizeLimitBytes != 0 && mIsFileSizeLimitExplicitlyRequested) { 527 size = mMaxFileSizeLimitBytes * 6 / 1000; 528 } 529 530 // Max file duration limit is set 531 if (mMaxFileDurationLimitUs != 0) { 532 if (bitRate > 0) { 533 int64_t size2 = 534 ((mMaxFileDurationLimitUs * bitRate * 6) / 1000 / 8000000); 535 if (mMaxFileSizeLimitBytes != 0 && mIsFileSizeLimitExplicitlyRequested) { 536 // When both file size and duration limits are set, 537 // we use the smaller limit of the two. 538 if (size > size2) { 539 size = size2; 540 } 541 } else { 542 // Only max file duration limit is set 543 size = size2; 544 } 545 } 546 } 547 548 if (size < MIN_MOOV_BOX_SIZE) { 549 size = MIN_MOOV_BOX_SIZE; 550 } 551 552 // Any long duration recording will be probably end up with 553 // non-streamable mp4 file. 554 if (size > MAX_MOOV_BOX_SIZE) { 555 size = MAX_MOOV_BOX_SIZE; 556 } 557 558 ALOGI("limits: %lld/%lld bytes/us, bit rate: %d bps and the estimated" 559 " moov size %lld bytes", 560 mMaxFileSizeLimitBytes, mMaxFileDurationLimitUs, bitRate, size); 561 return factor * size; 562} 563 564status_t MPEG4Writer::start(MetaData *param) { 565 if (mInitCheck != OK) { 566 return UNKNOWN_ERROR; 567 } 568 569 /* 570 * Check mMaxFileSizeLimitBytes at the beginning 571 * since mMaxFileSizeLimitBytes may be implicitly 572 * changed later for 32-bit file offset even if 573 * user does not ask to set it explicitly. 574 */ 575 if (mMaxFileSizeLimitBytes != 0) { 576 mIsFileSizeLimitExplicitlyRequested = true; 577 } 578 579 int32_t use64BitOffset; 580 if (param && 581 param->findInt32(kKey64BitFileOffset, &use64BitOffset) && 582 use64BitOffset) { 583 mUse32BitOffset = false; 584 } 585 586 if (mUse32BitOffset) { 587 // Implicit 32 bit file size limit 588 if (mMaxFileSizeLimitBytes == 0) { 589 mMaxFileSizeLimitBytes = kMax32BitFileSize; 590 } 591 592 // If file size is set to be larger than the 32 bit file 593 // size limit, treat it as an error. 594 if (mMaxFileSizeLimitBytes > kMax32BitFileSize) { 595 ALOGW("32-bit file size limit (%lld bytes) too big. " 596 "It is changed to %lld bytes", 597 mMaxFileSizeLimitBytes, kMax32BitFileSize); 598 mMaxFileSizeLimitBytes = kMax32BitFileSize; 599 } 600 } 601 602 int32_t use2ByteNalLength; 603 if (param && 604 param->findInt32(kKey2ByteNalLength, &use2ByteNalLength) && 605 use2ByteNalLength) { 606 mUse4ByteNalLength = false; 607 } 608 609 int32_t isRealTimeRecording; 610 if (param && param->findInt32(kKeyRealTimeRecording, &isRealTimeRecording)) { 611 mIsRealTimeRecording = isRealTimeRecording; 612 } 613 614 mStartTimestampUs = -1; 615 616 if (mStarted) { 617 if (mPaused) { 618 mPaused = false; 619 return startTracks(param); 620 } 621 return OK; 622 } 623 624 if (!param || 625 !param->findInt32(kKeyTimeScale, &mTimeScale)) { 626 mTimeScale = 1000; 627 } 628 CHECK_GT(mTimeScale, 0); 629 ALOGV("movie time scale: %d", mTimeScale); 630 631 /* 632 * When the requested file size limit is small, the priority 633 * is to meet the file size limit requirement, rather than 634 * to make the file streamable. mStreamableFile does not tell 635 * whether the actual recorded file is streamable or not. 636 */ 637 mStreamableFile = 638 (mMaxFileSizeLimitBytes != 0 && 639 mMaxFileSizeLimitBytes >= kMinStreamableFileSizeInBytes); 640 641 /* 642 * mWriteMoovBoxToMemory is true if the amount of data in moov box is 643 * smaller than the reserved free space at the beginning of a file, AND 644 * when the content of moov box is constructed. Note that video/audio 645 * frame data is always written to the file but not in the memory. 646 * 647 * Before stop()/reset() is called, mWriteMoovBoxToMemory is always 648 * false. When reset() is called at the end of a recording session, 649 * Moov box needs to be constructed. 650 * 651 * 1) Right before a moov box is constructed, mWriteMoovBoxToMemory 652 * to set to mStreamableFile so that if 653 * the file is intended to be streamable, it is set to true; 654 * otherwise, it is set to false. When the value is set to false, 655 * all the content of the moov box is written immediately to 656 * the end of the file. When the value is set to true, all the 657 * content of the moov box is written to an in-memory cache, 658 * mMoovBoxBuffer, util the following condition happens. Note 659 * that the size of the in-memory cache is the same as the 660 * reserved free space at the beginning of the file. 661 * 662 * 2) While the data of the moov box is written to an in-memory 663 * cache, the data size is checked against the reserved space. 664 * If the data size surpasses the reserved space, subsequent moov 665 * data could no longer be hold in the in-memory cache. This also 666 * indicates that the reserved space was too small. At this point, 667 * _all_ moov data must be written to the end of the file. 668 * mWriteMoovBoxToMemory must be set to false to direct the write 669 * to the file. 670 * 671 * 3) If the data size in moov box is smaller than the reserved 672 * space after moov box is completely constructed, the in-memory 673 * cache copy of the moov box is written to the reserved free 674 * space. Thus, immediately after the moov is completedly 675 * constructed, mWriteMoovBoxToMemory is always set to false. 676 */ 677 mWriteMoovBoxToMemory = false; 678 mMoovBoxBuffer = NULL; 679 mMoovBoxBufferOffset = 0; 680 681 writeFtypBox(param); 682 683 mFreeBoxOffset = mOffset; 684 685 if (mEstimatedMoovBoxSize == 0) { 686 int32_t bitRate = -1; 687 if (param) { 688 param->findInt32(kKeyBitRate, &bitRate); 689 } 690 mEstimatedMoovBoxSize = estimateMoovBoxSize(bitRate); 691 } 692 CHECK_GE(mEstimatedMoovBoxSize, 8); 693 if (mStreamableFile) { 694 // Reserve a 'free' box only for streamable file 695 lseek64(mFd, mFreeBoxOffset, SEEK_SET); 696 writeInt32(mEstimatedMoovBoxSize); 697 write("free", 4); 698 mMdatOffset = mFreeBoxOffset + mEstimatedMoovBoxSize; 699 } else { 700 mMdatOffset = mOffset; 701 } 702 703 mOffset = mMdatOffset; 704 lseek64(mFd, mMdatOffset, SEEK_SET); 705 if (mUse32BitOffset) { 706 write("????mdat", 8); 707 } else { 708 write("\x00\x00\x00\x01mdat????????", 16); 709 } 710 711 status_t err = startWriterThread(); 712 if (err != OK) { 713 return err; 714 } 715 716 err = startTracks(param); 717 if (err != OK) { 718 return err; 719 } 720 721 mStarted = true; 722 return OK; 723} 724 725bool MPEG4Writer::use32BitFileOffset() const { 726 return mUse32BitOffset; 727} 728 729status_t MPEG4Writer::pause() { 730 if (mInitCheck != OK) { 731 return OK; 732 } 733 mPaused = true; 734 status_t err = OK; 735 for (List<Track *>::iterator it = mTracks.begin(); 736 it != mTracks.end(); ++it) { 737 status_t status = (*it)->pause(); 738 if (status != OK) { 739 err = status; 740 } 741 } 742 return err; 743} 744 745void MPEG4Writer::stopWriterThread() { 746 ALOGD("Stopping writer thread"); 747 if (!mWriterThreadStarted) { 748 return; 749 } 750 751 { 752 Mutex::Autolock autolock(mLock); 753 754 mDone = true; 755 mChunkReadyCondition.signal(); 756 } 757 758 void *dummy; 759 pthread_join(mThread, &dummy); 760 mWriterThreadStarted = false; 761 ALOGD("Writer thread stopped"); 762} 763 764/* 765 * MP4 file standard defines a composition matrix: 766 * | a b u | 767 * | c d v | 768 * | x y w | 769 * 770 * the element in the matrix is stored in the following 771 * order: {a, b, u, c, d, v, x, y, w}, 772 * where a, b, c, d, x, and y is in 16.16 format, while 773 * u, v and w is in 2.30 format. 774 */ 775void MPEG4Writer::writeCompositionMatrix(int degrees) { 776 ALOGV("writeCompositionMatrix"); 777 uint32_t a = 0x00010000; 778 uint32_t b = 0; 779 uint32_t c = 0; 780 uint32_t d = 0x00010000; 781 switch (degrees) { 782 case 0: 783 break; 784 case 90: 785 a = 0; 786 b = 0x00010000; 787 c = 0xFFFF0000; 788 d = 0; 789 break; 790 case 180: 791 a = 0xFFFF0000; 792 d = 0xFFFF0000; 793 break; 794 case 270: 795 a = 0; 796 b = 0xFFFF0000; 797 c = 0x00010000; 798 d = 0; 799 break; 800 default: 801 CHECK(!"Should never reach this unknown rotation"); 802 break; 803 } 804 805 writeInt32(a); // a 806 writeInt32(b); // b 807 writeInt32(0); // u 808 writeInt32(c); // c 809 writeInt32(d); // d 810 writeInt32(0); // v 811 writeInt32(0); // x 812 writeInt32(0); // y 813 writeInt32(0x40000000); // w 814} 815 816void MPEG4Writer::release() { 817 close(mFd); 818 mFd = -1; 819 mInitCheck = NO_INIT; 820 mStarted = false; 821} 822 823status_t MPEG4Writer::reset() { 824 if (mInitCheck != OK) { 825 return OK; 826 } else { 827 if (!mWriterThreadStarted || 828 !mStarted) { 829 if (mWriterThreadStarted) { 830 stopWriterThread(); 831 } 832 release(); 833 return OK; 834 } 835 } 836 837 status_t err = OK; 838 int64_t maxDurationUs = 0; 839 int64_t minDurationUs = 0x7fffffffffffffffLL; 840 for (List<Track *>::iterator it = mTracks.begin(); 841 it != mTracks.end(); ++it) { 842 status_t status = (*it)->stop(); 843 if (err == OK && status != OK) { 844 err = status; 845 } 846 847 int64_t durationUs = (*it)->getDurationUs(); 848 if (durationUs > maxDurationUs) { 849 maxDurationUs = durationUs; 850 } 851 if (durationUs < minDurationUs) { 852 minDurationUs = durationUs; 853 } 854 } 855 856 if (mTracks.size() > 1) { 857 ALOGD("Duration from tracks range is [%lld, %lld] us", 858 minDurationUs, maxDurationUs); 859 } 860 861 stopWriterThread(); 862 863 // Do not write out movie header on error. 864 if (err != OK) { 865 release(); 866 return err; 867 } 868 869 // Fix up the size of the 'mdat' chunk. 870 if (mUse32BitOffset) { 871 lseek64(mFd, mMdatOffset, SEEK_SET); 872 uint32_t size = htonl(static_cast<uint32_t>(mOffset - mMdatOffset)); 873 ::write(mFd, &size, 4); 874 } else { 875 lseek64(mFd, mMdatOffset + 8, SEEK_SET); 876 uint64_t size = mOffset - mMdatOffset; 877 size = hton64(size); 878 ::write(mFd, &size, 8); 879 } 880 lseek64(mFd, mOffset, SEEK_SET); 881 882 // Construct moov box now 883 mMoovBoxBufferOffset = 0; 884 mWriteMoovBoxToMemory = mStreamableFile; 885 if (mWriteMoovBoxToMemory) { 886 // There is no need to allocate in-memory cache 887 // for moov box if the file is not streamable. 888 889 mMoovBoxBuffer = (uint8_t *) malloc(mEstimatedMoovBoxSize); 890 CHECK(mMoovBoxBuffer != NULL); 891 } 892 writeMoovBox(maxDurationUs); 893 894 // mWriteMoovBoxToMemory could be set to false in 895 // MPEG4Writer::write() method 896 if (mWriteMoovBoxToMemory) { 897 mWriteMoovBoxToMemory = false; 898 // Content of the moov box is saved in the cache, and the in-memory 899 // moov box needs to be written to the file in a single shot. 900 901 CHECK_LE(mMoovBoxBufferOffset + 8, mEstimatedMoovBoxSize); 902 903 // Moov box 904 lseek64(mFd, mFreeBoxOffset, SEEK_SET); 905 mOffset = mFreeBoxOffset; 906 write(mMoovBoxBuffer, 1, mMoovBoxBufferOffset); 907 908 // Free box 909 lseek64(mFd, mOffset, SEEK_SET); 910 writeInt32(mEstimatedMoovBoxSize - mMoovBoxBufferOffset); 911 write("free", 4); 912 } else { 913 ALOGI("The mp4 file will not be streamable."); 914 } 915 916 // Free in-memory cache for moov box 917 if (mMoovBoxBuffer != NULL) { 918 free(mMoovBoxBuffer); 919 mMoovBoxBuffer = NULL; 920 mMoovBoxBufferOffset = 0; 921 } 922 923 CHECK(mBoxes.empty()); 924 925 release(); 926 return err; 927} 928 929uint32_t MPEG4Writer::getMpeg4Time() { 930 time_t now = time(NULL); 931 // MP4 file uses time counting seconds since midnight, Jan. 1, 1904 932 // while time function returns Unix epoch values which starts 933 // at 1970-01-01. Lets add the number of seconds between them 934 uint32_t mpeg4Time = now + (66 * 365 + 17) * (24 * 60 * 60); 935 return mpeg4Time; 936} 937 938void MPEG4Writer::writeMvhdBox(int64_t durationUs) { 939 uint32_t now = getMpeg4Time(); 940 beginBox("mvhd"); 941 writeInt32(0); // version=0, flags=0 942 writeInt32(now); // creation time 943 writeInt32(now); // modification time 944 writeInt32(mTimeScale); // mvhd timescale 945 int32_t duration = (durationUs * mTimeScale + 5E5) / 1E6; 946 writeInt32(duration); 947 writeInt32(0x10000); // rate: 1.0 948 writeInt16(0x100); // volume 949 writeInt16(0); // reserved 950 writeInt32(0); // reserved 951 writeInt32(0); // reserved 952 writeCompositionMatrix(0); // matrix 953 writeInt32(0); // predefined 954 writeInt32(0); // predefined 955 writeInt32(0); // predefined 956 writeInt32(0); // predefined 957 writeInt32(0); // predefined 958 writeInt32(0); // predefined 959 writeInt32(mTracks.size() + 1); // nextTrackID 960 endBox(); // mvhd 961} 962 963void MPEG4Writer::writeMoovBox(int64_t durationUs) { 964 beginBox("moov"); 965 writeMvhdBox(durationUs); 966 if (mAreGeoTagsAvailable) { 967 writeUdtaBox(); 968 } 969 int32_t id = 1; 970 for (List<Track *>::iterator it = mTracks.begin(); 971 it != mTracks.end(); ++it, ++id) { 972 (*it)->writeTrackHeader(mUse32BitOffset); 973 } 974 endBox(); // moov 975} 976 977void MPEG4Writer::writeFtypBox(MetaData *param) { 978 beginBox("ftyp"); 979 980 int32_t fileType; 981 if (param && param->findInt32(kKeyFileType, &fileType) && 982 fileType != OUTPUT_FORMAT_MPEG_4) { 983 writeFourcc("3gp4"); 984 writeInt32(0); 985 writeFourcc("isom"); 986 writeFourcc("3gp4"); 987 } else { 988 writeFourcc("mp42"); 989 writeInt32(0); 990 writeFourcc("isom"); 991 writeFourcc("mp42"); 992 } 993 994 endBox(); 995} 996 997static bool isTestModeEnabled() { 998#if (PROPERTY_VALUE_MAX < 5) 999#error "PROPERTY_VALUE_MAX must be at least 5" 1000#endif 1001 1002 // Test mode is enabled only if rw.media.record.test system 1003 // property is enabled. 1004 char value[PROPERTY_VALUE_MAX]; 1005 if (property_get("rw.media.record.test", value, NULL) && 1006 (!strcasecmp(value, "true") || !strcasecmp(value, "1"))) { 1007 return true; 1008 } 1009 return false; 1010} 1011 1012void MPEG4Writer::sendSessionSummary() { 1013 // Send session summary only if test mode is enabled 1014 if (!isTestModeEnabled()) { 1015 return; 1016 } 1017 1018 for (List<ChunkInfo>::iterator it = mChunkInfos.begin(); 1019 it != mChunkInfos.end(); ++it) { 1020 int trackNum = it->mTrack->getTrackId() << 28; 1021 notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 1022 trackNum | MEDIA_RECORDER_TRACK_INTER_CHUNK_TIME_MS, 1023 it->mMaxInterChunkDurUs); 1024 } 1025} 1026 1027status_t MPEG4Writer::setInterleaveDuration(uint32_t durationUs) { 1028 mInterleaveDurationUs = durationUs; 1029 return OK; 1030} 1031 1032void MPEG4Writer::lock() { 1033 mLock.lock(); 1034} 1035 1036void MPEG4Writer::unlock() { 1037 mLock.unlock(); 1038} 1039 1040off64_t MPEG4Writer::addSample_l(MediaBuffer *buffer) { 1041 off64_t old_offset = mOffset; 1042 1043 ::write(mFd, 1044 (const uint8_t *)buffer->data() + buffer->range_offset(), 1045 buffer->range_length()); 1046 1047 mOffset += buffer->range_length(); 1048 1049 return old_offset; 1050} 1051 1052static void StripStartcode(MediaBuffer *buffer) { 1053 if (buffer->range_length() < 4) { 1054 return; 1055 } 1056 1057 const uint8_t *ptr = 1058 (const uint8_t *)buffer->data() + buffer->range_offset(); 1059 1060 if (!memcmp(ptr, "\x00\x00\x00\x01", 4)) { 1061 buffer->set_range( 1062 buffer->range_offset() + 4, buffer->range_length() - 4); 1063 } 1064} 1065 1066off64_t MPEG4Writer::addLengthPrefixedSample_l(MediaBuffer *buffer) { 1067 off64_t old_offset = mOffset; 1068 1069 size_t length = buffer->range_length(); 1070 1071 if (mUse4ByteNalLength) { 1072 uint8_t x = length >> 24; 1073 ::write(mFd, &x, 1); 1074 x = (length >> 16) & 0xff; 1075 ::write(mFd, &x, 1); 1076 x = (length >> 8) & 0xff; 1077 ::write(mFd, &x, 1); 1078 x = length & 0xff; 1079 ::write(mFd, &x, 1); 1080 1081 ::write(mFd, 1082 (const uint8_t *)buffer->data() + buffer->range_offset(), 1083 length); 1084 1085 mOffset += length + 4; 1086 } else { 1087 CHECK_LT(length, 65536); 1088 1089 uint8_t x = length >> 8; 1090 ::write(mFd, &x, 1); 1091 x = length & 0xff; 1092 ::write(mFd, &x, 1); 1093 ::write(mFd, (const uint8_t *)buffer->data() + buffer->range_offset(), length); 1094 mOffset += length + 2; 1095 } 1096 1097 return old_offset; 1098} 1099 1100size_t MPEG4Writer::write( 1101 const void *ptr, size_t size, size_t nmemb) { 1102 1103 const size_t bytes = size * nmemb; 1104 if (mWriteMoovBoxToMemory) { 1105 1106 off64_t moovBoxSize = 8 + mMoovBoxBufferOffset + bytes; 1107 if (moovBoxSize > mEstimatedMoovBoxSize) { 1108 // The reserved moov box at the beginning of the file 1109 // is not big enough. Moov box should be written to 1110 // the end of the file from now on, but not to the 1111 // in-memory cache. 1112 1113 // We write partial moov box that is in the memory to 1114 // the file first. 1115 for (List<off64_t>::iterator it = mBoxes.begin(); 1116 it != mBoxes.end(); ++it) { 1117 (*it) += mOffset; 1118 } 1119 lseek64(mFd, mOffset, SEEK_SET); 1120 ::write(mFd, mMoovBoxBuffer, mMoovBoxBufferOffset); 1121 ::write(mFd, ptr, bytes); 1122 mOffset += (bytes + mMoovBoxBufferOffset); 1123 1124 // All subsequent moov box content will be written 1125 // to the end of the file. 1126 mWriteMoovBoxToMemory = false; 1127 } else { 1128 memcpy(mMoovBoxBuffer + mMoovBoxBufferOffset, ptr, bytes); 1129 mMoovBoxBufferOffset += bytes; 1130 } 1131 } else { 1132 ::write(mFd, ptr, size * nmemb); 1133 mOffset += bytes; 1134 } 1135 return bytes; 1136} 1137 1138void MPEG4Writer::beginBox(const char *fourcc) { 1139 CHECK_EQ(strlen(fourcc), 4); 1140 1141 mBoxes.push_back(mWriteMoovBoxToMemory? 1142 mMoovBoxBufferOffset: mOffset); 1143 1144 writeInt32(0); 1145 writeFourcc(fourcc); 1146} 1147 1148void MPEG4Writer::endBox() { 1149 CHECK(!mBoxes.empty()); 1150 1151 off64_t offset = *--mBoxes.end(); 1152 mBoxes.erase(--mBoxes.end()); 1153 1154 if (mWriteMoovBoxToMemory) { 1155 int32_t x = htonl(mMoovBoxBufferOffset - offset); 1156 memcpy(mMoovBoxBuffer + offset, &x, 4); 1157 } else { 1158 lseek64(mFd, offset, SEEK_SET); 1159 writeInt32(mOffset - offset); 1160 mOffset -= 4; 1161 lseek64(mFd, mOffset, SEEK_SET); 1162 } 1163} 1164 1165void MPEG4Writer::writeInt8(int8_t x) { 1166 write(&x, 1, 1); 1167} 1168 1169void MPEG4Writer::writeInt16(int16_t x) { 1170 x = htons(x); 1171 write(&x, 1, 2); 1172} 1173 1174void MPEG4Writer::writeInt32(int32_t x) { 1175 x = htonl(x); 1176 write(&x, 1, 4); 1177} 1178 1179void MPEG4Writer::writeInt64(int64_t x) { 1180 x = hton64(x); 1181 write(&x, 1, 8); 1182} 1183 1184void MPEG4Writer::writeCString(const char *s) { 1185 size_t n = strlen(s); 1186 write(s, 1, n + 1); 1187} 1188 1189void MPEG4Writer::writeFourcc(const char *s) { 1190 CHECK_EQ(strlen(s), 4); 1191 write(s, 1, 4); 1192} 1193 1194 1195// Written in +/-DD.DDDD format 1196void MPEG4Writer::writeLatitude(int degreex10000) { 1197 bool isNegative = (degreex10000 < 0); 1198 char sign = isNegative? '-': '+'; 1199 1200 // Handle the whole part 1201 char str[9]; 1202 int wholePart = degreex10000 / 10000; 1203 if (wholePart == 0) { 1204 snprintf(str, 5, "%c%.2d.", sign, wholePart); 1205 } else { 1206 snprintf(str, 5, "%+.2d.", wholePart); 1207 } 1208 1209 // Handle the fractional part 1210 int fractionalPart = degreex10000 - (wholePart * 10000); 1211 if (fractionalPart < 0) { 1212 fractionalPart = -fractionalPart; 1213 } 1214 snprintf(&str[4], 5, "%.4d", fractionalPart); 1215 1216 // Do not write the null terminator 1217 write(str, 1, 8); 1218} 1219 1220// Written in +/- DDD.DDDD format 1221void MPEG4Writer::writeLongitude(int degreex10000) { 1222 bool isNegative = (degreex10000 < 0); 1223 char sign = isNegative? '-': '+'; 1224 1225 // Handle the whole part 1226 char str[10]; 1227 int wholePart = degreex10000 / 10000; 1228 if (wholePart == 0) { 1229 snprintf(str, 6, "%c%.3d.", sign, wholePart); 1230 } else { 1231 snprintf(str, 6, "%+.3d.", wholePart); 1232 } 1233 1234 // Handle the fractional part 1235 int fractionalPart = degreex10000 - (wholePart * 10000); 1236 if (fractionalPart < 0) { 1237 fractionalPart = -fractionalPart; 1238 } 1239 snprintf(&str[5], 5, "%.4d", fractionalPart); 1240 1241 // Do not write the null terminator 1242 write(str, 1, 9); 1243} 1244 1245/* 1246 * Geodata is stored according to ISO-6709 standard. 1247 * latitudex10000 is latitude in degrees times 10000, and 1248 * longitudex10000 is longitude in degrees times 10000. 1249 * The range for the latitude is in [-90, +90], and 1250 * The range for the longitude is in [-180, +180] 1251 */ 1252status_t MPEG4Writer::setGeoData(int latitudex10000, int longitudex10000) { 1253 // Is latitude or longitude out of range? 1254 if (latitudex10000 < -900000 || latitudex10000 > 900000 || 1255 longitudex10000 < -1800000 || longitudex10000 > 1800000) { 1256 return BAD_VALUE; 1257 } 1258 1259 mLatitudex10000 = latitudex10000; 1260 mLongitudex10000 = longitudex10000; 1261 mAreGeoTagsAvailable = true; 1262 return OK; 1263} 1264 1265void MPEG4Writer::write(const void *data, size_t size) { 1266 write(data, 1, size); 1267} 1268 1269bool MPEG4Writer::isFileStreamable() const { 1270 return mStreamableFile; 1271} 1272 1273bool MPEG4Writer::exceedsFileSizeLimit() { 1274 // No limit 1275 if (mMaxFileSizeLimitBytes == 0) { 1276 return false; 1277 } 1278 1279 int64_t nTotalBytesEstimate = static_cast<int64_t>(mEstimatedMoovBoxSize); 1280 for (List<Track *>::iterator it = mTracks.begin(); 1281 it != mTracks.end(); ++it) { 1282 nTotalBytesEstimate += (*it)->getEstimatedTrackSizeBytes(); 1283 } 1284 1285 if (!mStreamableFile) { 1286 // Add 1024 bytes as error tolerance 1287 return nTotalBytesEstimate + 1024 >= mMaxFileSizeLimitBytes; 1288 } 1289 // Be conservative in the estimate: do not exceed 95% of 1290 // the target file limit. For small target file size limit, though, 1291 // this will not help. 1292 return (nTotalBytesEstimate >= (95 * mMaxFileSizeLimitBytes) / 100); 1293} 1294 1295bool MPEG4Writer::exceedsFileDurationLimit() { 1296 // No limit 1297 if (mMaxFileDurationLimitUs == 0) { 1298 return false; 1299 } 1300 1301 for (List<Track *>::iterator it = mTracks.begin(); 1302 it != mTracks.end(); ++it) { 1303 if ((*it)->getDurationUs() >= mMaxFileDurationLimitUs) { 1304 return true; 1305 } 1306 } 1307 return false; 1308} 1309 1310bool MPEG4Writer::reachedEOS() { 1311 bool allDone = true; 1312 for (List<Track *>::iterator it = mTracks.begin(); 1313 it != mTracks.end(); ++it) { 1314 if (!(*it)->reachedEOS()) { 1315 allDone = false; 1316 break; 1317 } 1318 } 1319 1320 return allDone; 1321} 1322 1323void MPEG4Writer::setStartTimestampUs(int64_t timeUs) { 1324 ALOGI("setStartTimestampUs: %lld", timeUs); 1325 CHECK_GE(timeUs, 0ll); 1326 Mutex::Autolock autoLock(mLock); 1327 if (mStartTimestampUs < 0 || mStartTimestampUs > timeUs) { 1328 mStartTimestampUs = timeUs; 1329 ALOGI("Earliest track starting time: %lld", mStartTimestampUs); 1330 } 1331} 1332 1333int64_t MPEG4Writer::getStartTimestampUs() { 1334 Mutex::Autolock autoLock(mLock); 1335 return mStartTimestampUs; 1336} 1337 1338size_t MPEG4Writer::numTracks() { 1339 Mutex::Autolock autolock(mLock); 1340 return mTracks.size(); 1341} 1342 1343//////////////////////////////////////////////////////////////////////////////// 1344 1345MPEG4Writer::Track::Track( 1346 MPEG4Writer *owner, const sp<MediaSource> &source, size_t trackId) 1347 : mOwner(owner), 1348 mMeta(source->getFormat()), 1349 mSource(source), 1350 mDone(false), 1351 mPaused(false), 1352 mResumed(false), 1353 mStarted(false), 1354 mTrackId(trackId), 1355 mTrackDurationUs(0), 1356 mEstimatedTrackSizeBytes(0), 1357 mSamplesHaveSameSize(true), 1358 mStszTableEntries(new ListTableEntries<uint32_t>(1000, 1)), 1359 mStcoTableEntries(new ListTableEntries<uint32_t>(1000, 1)), 1360 mCo64TableEntries(new ListTableEntries<off64_t>(1000, 1)), 1361 mStscTableEntries(new ListTableEntries<uint32_t>(1000, 3)), 1362 mStssTableEntries(new ListTableEntries<uint32_t>(1000, 1)), 1363 mSttsTableEntries(new ListTableEntries<uint32_t>(1000, 2)), 1364 mCttsTableEntries(new ListTableEntries<uint32_t>(1000, 2)), 1365 mCodecSpecificData(NULL), 1366 mCodecSpecificDataSize(0), 1367 mGotAllCodecSpecificData(false), 1368 mReachedEOS(false), 1369 mRotation(0) { 1370 getCodecSpecificDataFromInputFormatIfPossible(); 1371 1372 const char *mime; 1373 mMeta->findCString(kKeyMIMEType, &mime); 1374 mIsAvc = !strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_AVC); 1375 mIsAudio = !strncasecmp(mime, "audio/", 6); 1376 mIsMPEG4 = !strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_MPEG4) || 1377 !strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_AAC); 1378 1379 setTimeScale(); 1380} 1381 1382void MPEG4Writer::Track::updateTrackSizeEstimate() { 1383 1384 uint32_t stcoBoxCount = (mOwner->use32BitFileOffset() 1385 ? mStcoTableEntries->count() 1386 : mCo64TableEntries->count()); 1387 int64_t stcoBoxSizeBytes = stcoBoxCount * 4; 1388 int64_t stszBoxSizeBytes = mSamplesHaveSameSize? 4: (mStszTableEntries->count() * 4); 1389 1390 mEstimatedTrackSizeBytes = mMdatSizeBytes; // media data size 1391 if (!mOwner->isFileStreamable()) { 1392 // Reserved free space is not large enough to hold 1393 // all meta data and thus wasted. 1394 mEstimatedTrackSizeBytes += mStscTableEntries->count() * 12 + // stsc box size 1395 mStssTableEntries->count() * 4 + // stss box size 1396 mSttsTableEntries->count() * 8 + // stts box size 1397 mCttsTableEntries->count() * 8 + // ctts box size 1398 stcoBoxSizeBytes + // stco box size 1399 stszBoxSizeBytes; // stsz box size 1400 } 1401} 1402 1403void MPEG4Writer::Track::addOneStscTableEntry( 1404 size_t chunkId, size_t sampleId) { 1405 1406 mStscTableEntries->add(htonl(chunkId)); 1407 mStscTableEntries->add(htonl(sampleId)); 1408 mStscTableEntries->add(htonl(1)); 1409} 1410 1411void MPEG4Writer::Track::addOneStssTableEntry(size_t sampleId) { 1412 mStssTableEntries->add(htonl(sampleId)); 1413} 1414 1415void MPEG4Writer::Track::addOneSttsTableEntry( 1416 size_t sampleCount, int32_t duration) { 1417 1418 if (duration == 0) { 1419 ALOGW("0-duration samples found: %zu", sampleCount); 1420 } 1421 mSttsTableEntries->add(htonl(sampleCount)); 1422 mSttsTableEntries->add(htonl(duration)); 1423} 1424 1425void MPEG4Writer::Track::addOneCttsTableEntry( 1426 size_t sampleCount, int32_t duration) { 1427 1428 if (mIsAudio) { 1429 return; 1430 } 1431 mCttsTableEntries->add(htonl(sampleCount)); 1432 mCttsTableEntries->add(htonl(duration)); 1433} 1434 1435void MPEG4Writer::Track::addChunkOffset(off64_t offset) { 1436 if (mOwner->use32BitFileOffset()) { 1437 uint32_t value = offset; 1438 mStcoTableEntries->add(htonl(value)); 1439 } else { 1440 mCo64TableEntries->add(hton64(offset)); 1441 } 1442} 1443 1444void MPEG4Writer::Track::setTimeScale() { 1445 ALOGV("setTimeScale"); 1446 // Default time scale 1447 mTimeScale = 90000; 1448 1449 if (mIsAudio) { 1450 // Use the sampling rate as the default time scale for audio track. 1451 int32_t sampleRate; 1452 bool success = mMeta->findInt32(kKeySampleRate, &sampleRate); 1453 CHECK(success); 1454 mTimeScale = sampleRate; 1455 } 1456 1457 // If someone would like to overwrite the timescale, use user-supplied value. 1458 int32_t timeScale; 1459 if (mMeta->findInt32(kKeyTimeScale, &timeScale)) { 1460 mTimeScale = timeScale; 1461 } 1462 1463 CHECK_GT(mTimeScale, 0); 1464} 1465 1466void MPEG4Writer::Track::getCodecSpecificDataFromInputFormatIfPossible() { 1467 const char *mime; 1468 CHECK(mMeta->findCString(kKeyMIMEType, &mime)); 1469 1470 if (!strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_AVC)) { 1471 uint32_t type; 1472 const void *data; 1473 size_t size; 1474 if (mMeta->findData(kKeyAVCC, &type, &data, &size)) { 1475 mCodecSpecificData = malloc(size); 1476 mCodecSpecificDataSize = size; 1477 memcpy(mCodecSpecificData, data, size); 1478 mGotAllCodecSpecificData = true; 1479 } 1480 } else if (!strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_MPEG4) 1481 || !strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_AAC)) { 1482 uint32_t type; 1483 const void *data; 1484 size_t size; 1485 if (mMeta->findData(kKeyESDS, &type, &data, &size)) { 1486 ESDS esds(data, size); 1487 if (esds.getCodecSpecificInfo(&data, &size) == OK) { 1488 mCodecSpecificData = malloc(size); 1489 mCodecSpecificDataSize = size; 1490 memcpy(mCodecSpecificData, data, size); 1491 mGotAllCodecSpecificData = true; 1492 } 1493 } 1494 } 1495} 1496 1497MPEG4Writer::Track::~Track() { 1498 stop(); 1499 1500 delete mStszTableEntries; 1501 delete mStcoTableEntries; 1502 delete mCo64TableEntries; 1503 delete mStscTableEntries; 1504 delete mSttsTableEntries; 1505 delete mStssTableEntries; 1506 delete mCttsTableEntries; 1507 1508 mStszTableEntries = NULL; 1509 mStcoTableEntries = NULL; 1510 mCo64TableEntries = NULL; 1511 mStscTableEntries = NULL; 1512 mSttsTableEntries = NULL; 1513 mStssTableEntries = NULL; 1514 mCttsTableEntries = NULL; 1515 1516 if (mCodecSpecificData != NULL) { 1517 free(mCodecSpecificData); 1518 mCodecSpecificData = NULL; 1519 } 1520} 1521 1522void MPEG4Writer::Track::initTrackingProgressStatus(MetaData *params) { 1523 ALOGV("initTrackingProgressStatus"); 1524 mPreviousTrackTimeUs = -1; 1525 mTrackingProgressStatus = false; 1526 mTrackEveryTimeDurationUs = 0; 1527 { 1528 int64_t timeUs; 1529 if (params && params->findInt64(kKeyTrackTimeStatus, &timeUs)) { 1530 ALOGV("Receive request to track progress status for every %lld us", timeUs); 1531 mTrackEveryTimeDurationUs = timeUs; 1532 mTrackingProgressStatus = true; 1533 } 1534 } 1535} 1536 1537// static 1538void *MPEG4Writer::ThreadWrapper(void *me) { 1539 ALOGV("ThreadWrapper: %p", me); 1540 MPEG4Writer *writer = static_cast<MPEG4Writer *>(me); 1541 writer->threadFunc(); 1542 return NULL; 1543} 1544 1545void MPEG4Writer::bufferChunk(const Chunk& chunk) { 1546 ALOGV("bufferChunk: %p", chunk.mTrack); 1547 Mutex::Autolock autolock(mLock); 1548 CHECK_EQ(mDone, false); 1549 1550 for (List<ChunkInfo>::iterator it = mChunkInfos.begin(); 1551 it != mChunkInfos.end(); ++it) { 1552 1553 if (chunk.mTrack == it->mTrack) { // Found owner 1554 it->mChunks.push_back(chunk); 1555 mChunkReadyCondition.signal(); 1556 return; 1557 } 1558 } 1559 1560 CHECK(!"Received a chunk for a unknown track"); 1561} 1562 1563void MPEG4Writer::writeChunkToFile(Chunk* chunk) { 1564 ALOGV("writeChunkToFile: %lld from %s track", 1565 chunk->mTimeStampUs, chunk->mTrack->isAudio()? "audio": "video"); 1566 1567 int32_t isFirstSample = true; 1568 while (!chunk->mSamples.empty()) { 1569 List<MediaBuffer *>::iterator it = chunk->mSamples.begin(); 1570 1571 off64_t offset = chunk->mTrack->isAvc() 1572 ? addLengthPrefixedSample_l(*it) 1573 : addSample_l(*it); 1574 1575 if (isFirstSample) { 1576 chunk->mTrack->addChunkOffset(offset); 1577 isFirstSample = false; 1578 } 1579 1580 (*it)->release(); 1581 (*it) = NULL; 1582 chunk->mSamples.erase(it); 1583 } 1584 chunk->mSamples.clear(); 1585} 1586 1587void MPEG4Writer::writeAllChunks() { 1588 ALOGV("writeAllChunks"); 1589 size_t outstandingChunks = 0; 1590 Chunk chunk; 1591 while (findChunkToWrite(&chunk)) { 1592 writeChunkToFile(&chunk); 1593 ++outstandingChunks; 1594 } 1595 1596 sendSessionSummary(); 1597 1598 mChunkInfos.clear(); 1599 ALOGD("%zu chunks are written in the last batch", outstandingChunks); 1600} 1601 1602bool MPEG4Writer::findChunkToWrite(Chunk *chunk) { 1603 ALOGV("findChunkToWrite"); 1604 1605 int64_t minTimestampUs = 0x7FFFFFFFFFFFFFFFLL; 1606 Track *track = NULL; 1607 for (List<ChunkInfo>::iterator it = mChunkInfos.begin(); 1608 it != mChunkInfos.end(); ++it) { 1609 if (!it->mChunks.empty()) { 1610 List<Chunk>::iterator chunkIt = it->mChunks.begin(); 1611 if (chunkIt->mTimeStampUs < minTimestampUs) { 1612 minTimestampUs = chunkIt->mTimeStampUs; 1613 track = it->mTrack; 1614 } 1615 } 1616 } 1617 1618 if (track == NULL) { 1619 ALOGV("Nothing to be written after all"); 1620 return false; 1621 } 1622 1623 if (mIsFirstChunk) { 1624 mIsFirstChunk = false; 1625 } 1626 1627 for (List<ChunkInfo>::iterator it = mChunkInfos.begin(); 1628 it != mChunkInfos.end(); ++it) { 1629 if (it->mTrack == track) { 1630 *chunk = *(it->mChunks.begin()); 1631 it->mChunks.erase(it->mChunks.begin()); 1632 CHECK_EQ(chunk->mTrack, track); 1633 1634 int64_t interChunkTimeUs = 1635 chunk->mTimeStampUs - it->mPrevChunkTimestampUs; 1636 if (interChunkTimeUs > it->mPrevChunkTimestampUs) { 1637 it->mMaxInterChunkDurUs = interChunkTimeUs; 1638 } 1639 1640 return true; 1641 } 1642 } 1643 1644 return false; 1645} 1646 1647void MPEG4Writer::threadFunc() { 1648 ALOGV("threadFunc"); 1649 1650 prctl(PR_SET_NAME, (unsigned long)"MPEG4Writer", 0, 0, 0); 1651 1652 Mutex::Autolock autoLock(mLock); 1653 while (!mDone) { 1654 Chunk chunk; 1655 bool chunkFound = false; 1656 1657 while (!mDone && !(chunkFound = findChunkToWrite(&chunk))) { 1658 mChunkReadyCondition.wait(mLock); 1659 } 1660 1661 // In real time recording mode, write without holding the lock in order 1662 // to reduce the blocking time for media track threads. 1663 // Otherwise, hold the lock until the existing chunks get written to the 1664 // file. 1665 if (chunkFound) { 1666 if (mIsRealTimeRecording) { 1667 mLock.unlock(); 1668 } 1669 writeChunkToFile(&chunk); 1670 if (mIsRealTimeRecording) { 1671 mLock.lock(); 1672 } 1673 } 1674 } 1675 1676 writeAllChunks(); 1677} 1678 1679status_t MPEG4Writer::startWriterThread() { 1680 ALOGV("startWriterThread"); 1681 1682 mDone = false; 1683 mIsFirstChunk = true; 1684 mDriftTimeUs = 0; 1685 for (List<Track *>::iterator it = mTracks.begin(); 1686 it != mTracks.end(); ++it) { 1687 ChunkInfo info; 1688 info.mTrack = *it; 1689 info.mPrevChunkTimestampUs = 0; 1690 info.mMaxInterChunkDurUs = 0; 1691 mChunkInfos.push_back(info); 1692 } 1693 1694 pthread_attr_t attr; 1695 pthread_attr_init(&attr); 1696 pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE); 1697 pthread_create(&mThread, &attr, ThreadWrapper, this); 1698 pthread_attr_destroy(&attr); 1699 mWriterThreadStarted = true; 1700 return OK; 1701} 1702 1703 1704status_t MPEG4Writer::Track::start(MetaData *params) { 1705 if (!mDone && mPaused) { 1706 mPaused = false; 1707 mResumed = true; 1708 return OK; 1709 } 1710 1711 int64_t startTimeUs; 1712 if (params == NULL || !params->findInt64(kKeyTime, &startTimeUs)) { 1713 startTimeUs = 0; 1714 } 1715 mStartTimeRealUs = startTimeUs; 1716 1717 int32_t rotationDegrees; 1718 if (!mIsAudio && params && params->findInt32(kKeyRotation, &rotationDegrees)) { 1719 mRotation = rotationDegrees; 1720 } 1721 1722 initTrackingProgressStatus(params); 1723 1724 sp<MetaData> meta = new MetaData; 1725 if (mOwner->isRealTimeRecording() && mOwner->numTracks() > 1) { 1726 /* 1727 * This extra delay of accepting incoming audio/video signals 1728 * helps to align a/v start time at the beginning of a recording 1729 * session, and it also helps eliminate the "recording" sound for 1730 * camcorder applications. 1731 * 1732 * If client does not set the start time offset, we fall back to 1733 * use the default initial delay value. 1734 */ 1735 int64_t startTimeOffsetUs = mOwner->getStartTimeOffsetMs() * 1000LL; 1736 if (startTimeOffsetUs < 0) { // Start time offset was not set 1737 startTimeOffsetUs = kInitialDelayTimeUs; 1738 } 1739 startTimeUs += startTimeOffsetUs; 1740 ALOGI("Start time offset: %lld us", startTimeOffsetUs); 1741 } 1742 1743 meta->setInt64(kKeyTime, startTimeUs); 1744 1745 status_t err = mSource->start(meta.get()); 1746 if (err != OK) { 1747 mDone = mReachedEOS = true; 1748 return err; 1749 } 1750 1751 pthread_attr_t attr; 1752 pthread_attr_init(&attr); 1753 pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE); 1754 1755 mDone = false; 1756 mStarted = true; 1757 mTrackDurationUs = 0; 1758 mReachedEOS = false; 1759 mEstimatedTrackSizeBytes = 0; 1760 mMdatSizeBytes = 0; 1761 mMaxChunkDurationUs = 0; 1762 1763 pthread_create(&mThread, &attr, ThreadWrapper, this); 1764 pthread_attr_destroy(&attr); 1765 1766 return OK; 1767} 1768 1769status_t MPEG4Writer::Track::pause() { 1770 mPaused = true; 1771 return OK; 1772} 1773 1774status_t MPEG4Writer::Track::stop() { 1775 ALOGD("%s track stopping", mIsAudio? "Audio": "Video"); 1776 if (!mStarted) { 1777 ALOGE("Stop() called but track is not started"); 1778 return ERROR_END_OF_STREAM; 1779 } 1780 1781 if (mDone) { 1782 return OK; 1783 } 1784 mDone = true; 1785 1786 ALOGD("%s track source stopping", mIsAudio? "Audio": "Video"); 1787 mSource->stop(); 1788 ALOGD("%s track source stopped", mIsAudio? "Audio": "Video"); 1789 1790 void *dummy; 1791 pthread_join(mThread, &dummy); 1792 status_t err = static_cast<status_t>(reinterpret_cast<uintptr_t>(dummy)); 1793 1794 ALOGD("%s track stopped", mIsAudio? "Audio": "Video"); 1795 return err; 1796} 1797 1798bool MPEG4Writer::Track::reachedEOS() { 1799 return mReachedEOS; 1800} 1801 1802// static 1803void *MPEG4Writer::Track::ThreadWrapper(void *me) { 1804 Track *track = static_cast<Track *>(me); 1805 1806 status_t err = track->threadEntry(); 1807 return (void *)(uintptr_t)err; 1808} 1809 1810static void getNalUnitType(uint8_t byte, uint8_t* type) { 1811 ALOGV("getNalUnitType: %d", byte); 1812 1813 // nal_unit_type: 5-bit unsigned integer 1814 *type = (byte & 0x1F); 1815} 1816 1817static const uint8_t *findNextStartCode( 1818 const uint8_t *data, size_t length) { 1819 1820 ALOGV("findNextStartCode: %p %d", data, length); 1821 1822 size_t bytesLeft = length; 1823 while (bytesLeft > 4 && 1824 memcmp("\x00\x00\x00\x01", &data[length - bytesLeft], 4)) { 1825 --bytesLeft; 1826 } 1827 if (bytesLeft <= 4) { 1828 bytesLeft = 0; // Last parameter set 1829 } 1830 return &data[length - bytesLeft]; 1831} 1832 1833const uint8_t *MPEG4Writer::Track::parseParamSet( 1834 const uint8_t *data, size_t length, int type, size_t *paramSetLen) { 1835 1836 ALOGV("parseParamSet"); 1837 CHECK(type == kNalUnitTypeSeqParamSet || 1838 type == kNalUnitTypePicParamSet); 1839 1840 const uint8_t *nextStartCode = findNextStartCode(data, length); 1841 *paramSetLen = nextStartCode - data; 1842 if (*paramSetLen == 0) { 1843 ALOGE("Param set is malformed, since its length is 0"); 1844 return NULL; 1845 } 1846 1847 AVCParamSet paramSet(*paramSetLen, data); 1848 if (type == kNalUnitTypeSeqParamSet) { 1849 if (*paramSetLen < 4) { 1850 ALOGE("Seq parameter set malformed"); 1851 return NULL; 1852 } 1853 if (mSeqParamSets.empty()) { 1854 mProfileIdc = data[1]; 1855 mProfileCompatible = data[2]; 1856 mLevelIdc = data[3]; 1857 } else { 1858 if (mProfileIdc != data[1] || 1859 mProfileCompatible != data[2] || 1860 mLevelIdc != data[3]) { 1861 ALOGE("Inconsistent profile/level found in seq parameter sets"); 1862 return NULL; 1863 } 1864 } 1865 mSeqParamSets.push_back(paramSet); 1866 } else { 1867 mPicParamSets.push_back(paramSet); 1868 } 1869 return nextStartCode; 1870} 1871 1872status_t MPEG4Writer::Track::copyAVCCodecSpecificData( 1873 const uint8_t *data, size_t size) { 1874 ALOGV("copyAVCCodecSpecificData"); 1875 1876 // 2 bytes for each of the parameter set length field 1877 // plus the 7 bytes for the header 1878 if (size < 4 + 7) { 1879 ALOGE("Codec specific data length too short: %zu", size); 1880 return ERROR_MALFORMED; 1881 } 1882 1883 mCodecSpecificDataSize = size; 1884 mCodecSpecificData = malloc(size); 1885 memcpy(mCodecSpecificData, data, size); 1886 return OK; 1887} 1888 1889status_t MPEG4Writer::Track::parseAVCCodecSpecificData( 1890 const uint8_t *data, size_t size) { 1891 1892 ALOGV("parseAVCCodecSpecificData"); 1893 // Data starts with a start code. 1894 // SPS and PPS are separated with start codes. 1895 // Also, SPS must come before PPS 1896 uint8_t type = kNalUnitTypeSeqParamSet; 1897 bool gotSps = false; 1898 bool gotPps = false; 1899 const uint8_t *tmp = data; 1900 const uint8_t *nextStartCode = data; 1901 size_t bytesLeft = size; 1902 size_t paramSetLen = 0; 1903 mCodecSpecificDataSize = 0; 1904 while (bytesLeft > 4 && !memcmp("\x00\x00\x00\x01", tmp, 4)) { 1905 getNalUnitType(*(tmp + 4), &type); 1906 if (type == kNalUnitTypeSeqParamSet) { 1907 if (gotPps) { 1908 ALOGE("SPS must come before PPS"); 1909 return ERROR_MALFORMED; 1910 } 1911 if (!gotSps) { 1912 gotSps = true; 1913 } 1914 nextStartCode = parseParamSet(tmp + 4, bytesLeft - 4, type, ¶mSetLen); 1915 } else if (type == kNalUnitTypePicParamSet) { 1916 if (!gotSps) { 1917 ALOGE("SPS must come before PPS"); 1918 return ERROR_MALFORMED; 1919 } 1920 if (!gotPps) { 1921 gotPps = true; 1922 } 1923 nextStartCode = parseParamSet(tmp + 4, bytesLeft - 4, type, ¶mSetLen); 1924 } else { 1925 ALOGE("Only SPS and PPS Nal units are expected"); 1926 return ERROR_MALFORMED; 1927 } 1928 1929 if (nextStartCode == NULL) { 1930 return ERROR_MALFORMED; 1931 } 1932 1933 // Move on to find the next parameter set 1934 bytesLeft -= nextStartCode - tmp; 1935 tmp = nextStartCode; 1936 mCodecSpecificDataSize += (2 + paramSetLen); 1937 } 1938 1939 { 1940 // Check on the number of seq parameter sets 1941 size_t nSeqParamSets = mSeqParamSets.size(); 1942 if (nSeqParamSets == 0) { 1943 ALOGE("Cound not find sequence parameter set"); 1944 return ERROR_MALFORMED; 1945 } 1946 1947 if (nSeqParamSets > 0x1F) { 1948 ALOGE("Too many seq parameter sets (%zu) found", nSeqParamSets); 1949 return ERROR_MALFORMED; 1950 } 1951 } 1952 1953 { 1954 // Check on the number of pic parameter sets 1955 size_t nPicParamSets = mPicParamSets.size(); 1956 if (nPicParamSets == 0) { 1957 ALOGE("Cound not find picture parameter set"); 1958 return ERROR_MALFORMED; 1959 } 1960 if (nPicParamSets > 0xFF) { 1961 ALOGE("Too many pic parameter sets (%zd) found", nPicParamSets); 1962 return ERROR_MALFORMED; 1963 } 1964 } 1965// FIXME: 1966// Add chromat_format_idc, bit depth values, etc for AVC/h264 high profile and above 1967// and remove #if 0 1968#if 0 1969 { 1970 // Check on the profiles 1971 // These profiles requires additional parameter set extensions 1972 if (mProfileIdc == 100 || mProfileIdc == 110 || 1973 mProfileIdc == 122 || mProfileIdc == 144) { 1974 ALOGE("Sorry, no support for profile_idc: %d!", mProfileIdc); 1975 return BAD_VALUE; 1976 } 1977 } 1978#endif 1979 return OK; 1980} 1981 1982status_t MPEG4Writer::Track::makeAVCCodecSpecificData( 1983 const uint8_t *data, size_t size) { 1984 1985 if (mCodecSpecificData != NULL) { 1986 ALOGE("Already have codec specific data"); 1987 return ERROR_MALFORMED; 1988 } 1989 1990 if (size < 4) { 1991 ALOGE("Codec specific data length too short: %zu", size); 1992 return ERROR_MALFORMED; 1993 } 1994 1995 // Data is in the form of AVCCodecSpecificData 1996 if (memcmp("\x00\x00\x00\x01", data, 4)) { 1997 return copyAVCCodecSpecificData(data, size); 1998 } 1999 2000 if (parseAVCCodecSpecificData(data, size) != OK) { 2001 return ERROR_MALFORMED; 2002 } 2003 2004 // ISO 14496-15: AVC file format 2005 mCodecSpecificDataSize += 7; // 7 more bytes in the header 2006 mCodecSpecificData = malloc(mCodecSpecificDataSize); 2007 uint8_t *header = (uint8_t *)mCodecSpecificData; 2008 header[0] = 1; // version 2009 header[1] = mProfileIdc; // profile indication 2010 header[2] = mProfileCompatible; // profile compatibility 2011 header[3] = mLevelIdc; 2012 2013 // 6-bit '111111' followed by 2-bit to lengthSizeMinuusOne 2014 if (mOwner->useNalLengthFour()) { 2015 header[4] = 0xfc | 3; // length size == 4 bytes 2016 } else { 2017 header[4] = 0xfc | 1; // length size == 2 bytes 2018 } 2019 2020 // 3-bit '111' followed by 5-bit numSequenceParameterSets 2021 int nSequenceParamSets = mSeqParamSets.size(); 2022 header[5] = 0xe0 | nSequenceParamSets; 2023 header += 6; 2024 for (List<AVCParamSet>::iterator it = mSeqParamSets.begin(); 2025 it != mSeqParamSets.end(); ++it) { 2026 // 16-bit sequence parameter set length 2027 uint16_t seqParamSetLength = it->mLength; 2028 header[0] = seqParamSetLength >> 8; 2029 header[1] = seqParamSetLength & 0xff; 2030 2031 // SPS NAL unit (sequence parameter length bytes) 2032 memcpy(&header[2], it->mData, seqParamSetLength); 2033 header += (2 + seqParamSetLength); 2034 } 2035 2036 // 8-bit nPictureParameterSets 2037 int nPictureParamSets = mPicParamSets.size(); 2038 header[0] = nPictureParamSets; 2039 header += 1; 2040 for (List<AVCParamSet>::iterator it = mPicParamSets.begin(); 2041 it != mPicParamSets.end(); ++it) { 2042 // 16-bit picture parameter set length 2043 uint16_t picParamSetLength = it->mLength; 2044 header[0] = picParamSetLength >> 8; 2045 header[1] = picParamSetLength & 0xff; 2046 2047 // PPS Nal unit (picture parameter set length bytes) 2048 memcpy(&header[2], it->mData, picParamSetLength); 2049 header += (2 + picParamSetLength); 2050 } 2051 2052 return OK; 2053} 2054 2055/* 2056 * Updates the drift time from the audio track so that 2057 * the video track can get the updated drift time information 2058 * from the file writer. The fluctuation of the drift time of the audio 2059 * encoding path is smoothed out with a simple filter by giving a larger 2060 * weight to more recently drift time. The filter coefficients, 0.5 and 0.5, 2061 * are heuristically determined. 2062 */ 2063void MPEG4Writer::Track::updateDriftTime(const sp<MetaData>& meta) { 2064 int64_t driftTimeUs = 0; 2065 if (meta->findInt64(kKeyDriftTime, &driftTimeUs)) { 2066 int64_t prevDriftTimeUs = mOwner->getDriftTimeUs(); 2067 int64_t timeUs = (driftTimeUs + prevDriftTimeUs) >> 1; 2068 mOwner->setDriftTimeUs(timeUs); 2069 } 2070} 2071 2072status_t MPEG4Writer::Track::threadEntry() { 2073 int32_t count = 0; 2074 const int64_t interleaveDurationUs = mOwner->interleaveDuration(); 2075 const bool hasMultipleTracks = (mOwner->numTracks() > 1); 2076 int64_t chunkTimestampUs = 0; 2077 int32_t nChunks = 0; 2078 int32_t nZeroLengthFrames = 0; 2079 int64_t lastTimestampUs = 0; // Previous sample time stamp 2080 int64_t lastDurationUs = 0; // Between the previous two samples 2081 int64_t currDurationTicks = 0; // Timescale based ticks 2082 int64_t lastDurationTicks = 0; // Timescale based ticks 2083 int32_t sampleCount = 1; // Sample count in the current stts table entry 2084 uint32_t previousSampleSize = 0; // Size of the previous sample 2085 int64_t previousPausedDurationUs = 0; 2086 int64_t timestampUs = 0; 2087 int64_t cttsOffsetTimeUs = 0; 2088 int64_t currCttsOffsetTimeTicks = 0; // Timescale based ticks 2089 int64_t lastCttsOffsetTimeTicks = -1; // Timescale based ticks 2090 int32_t cttsSampleCount = 0; // Sample count in the current ctts table entry 2091 uint32_t lastSamplesPerChunk = 0; 2092 2093 if (mIsAudio) { 2094 prctl(PR_SET_NAME, (unsigned long)"AudioTrackEncoding", 0, 0, 0); 2095 } else { 2096 prctl(PR_SET_NAME, (unsigned long)"VideoTrackEncoding", 0, 0, 0); 2097 } 2098 2099 if (mOwner->isRealTimeRecording()) { 2100 androidSetThreadPriority(0, ANDROID_PRIORITY_AUDIO); 2101 } 2102 2103 sp<MetaData> meta_data; 2104 2105 status_t err = OK; 2106 MediaBuffer *buffer; 2107 const char *trackName = mIsAudio ? "Audio" : "Video"; 2108 while (!mDone && (err = mSource->read(&buffer)) == OK) { 2109 if (buffer->range_length() == 0) { 2110 buffer->release(); 2111 buffer = NULL; 2112 ++nZeroLengthFrames; 2113 continue; 2114 } 2115 2116 // If the codec specific data has not been received yet, delay pause. 2117 // After the codec specific data is received, discard what we received 2118 // when the track is to be paused. 2119 if (mPaused && !mResumed) { 2120 buffer->release(); 2121 buffer = NULL; 2122 continue; 2123 } 2124 2125 ++count; 2126 2127 int32_t isCodecConfig; 2128 if (buffer->meta_data()->findInt32(kKeyIsCodecConfig, &isCodecConfig) 2129 && isCodecConfig) { 2130 CHECK(!mGotAllCodecSpecificData); 2131 2132 if (mIsAvc) { 2133 status_t err = makeAVCCodecSpecificData( 2134 (const uint8_t *)buffer->data() 2135 + buffer->range_offset(), 2136 buffer->range_length()); 2137 CHECK_EQ((status_t)OK, err); 2138 } else if (mIsMPEG4) { 2139 mCodecSpecificDataSize = buffer->range_length(); 2140 mCodecSpecificData = malloc(mCodecSpecificDataSize); 2141 memcpy(mCodecSpecificData, 2142 (const uint8_t *)buffer->data() 2143 + buffer->range_offset(), 2144 buffer->range_length()); 2145 } 2146 2147 buffer->release(); 2148 buffer = NULL; 2149 2150 mGotAllCodecSpecificData = true; 2151 continue; 2152 } 2153 2154 // Make a deep copy of the MediaBuffer and Metadata and release 2155 // the original as soon as we can 2156 MediaBuffer *copy = new MediaBuffer(buffer->range_length()); 2157 memcpy(copy->data(), (uint8_t *)buffer->data() + buffer->range_offset(), 2158 buffer->range_length()); 2159 copy->set_range(0, buffer->range_length()); 2160 meta_data = new MetaData(*buffer->meta_data().get()); 2161 buffer->release(); 2162 buffer = NULL; 2163 2164 if (mIsAvc) StripStartcode(copy); 2165 2166 size_t sampleSize = copy->range_length(); 2167 if (mIsAvc) { 2168 if (mOwner->useNalLengthFour()) { 2169 sampleSize += 4; 2170 } else { 2171 sampleSize += 2; 2172 } 2173 } 2174 2175 // Max file size or duration handling 2176 mMdatSizeBytes += sampleSize; 2177 updateTrackSizeEstimate(); 2178 2179 if (mOwner->exceedsFileSizeLimit()) { 2180 mOwner->notify(MEDIA_RECORDER_EVENT_INFO, MEDIA_RECORDER_INFO_MAX_FILESIZE_REACHED, 0); 2181 break; 2182 } 2183 if (mOwner->exceedsFileDurationLimit()) { 2184 mOwner->notify(MEDIA_RECORDER_EVENT_INFO, MEDIA_RECORDER_INFO_MAX_DURATION_REACHED, 0); 2185 break; 2186 } 2187 2188 2189 int32_t isSync = false; 2190 meta_data->findInt32(kKeyIsSyncFrame, &isSync); 2191 CHECK(meta_data->findInt64(kKeyTime, ×tampUs)); 2192 2193//////////////////////////////////////////////////////////////////////////////// 2194 if (mStszTableEntries->count() == 0) { 2195 mFirstSampleTimeRealUs = systemTime() / 1000; 2196 mStartTimestampUs = timestampUs; 2197 mOwner->setStartTimestampUs(mStartTimestampUs); 2198 previousPausedDurationUs = mStartTimestampUs; 2199 } 2200 2201 if (mResumed) { 2202 int64_t durExcludingEarlierPausesUs = timestampUs - previousPausedDurationUs; 2203 if (WARN_UNLESS(durExcludingEarlierPausesUs >= 0ll, "for %s track", trackName)) { 2204 copy->release(); 2205 return ERROR_MALFORMED; 2206 } 2207 2208 int64_t pausedDurationUs = durExcludingEarlierPausesUs - mTrackDurationUs; 2209 if (WARN_UNLESS(pausedDurationUs >= lastDurationUs, "for %s track", trackName)) { 2210 copy->release(); 2211 return ERROR_MALFORMED; 2212 } 2213 2214 previousPausedDurationUs += pausedDurationUs - lastDurationUs; 2215 mResumed = false; 2216 } 2217 2218 timestampUs -= previousPausedDurationUs; 2219 if (WARN_UNLESS(timestampUs >= 0ll, "for %s track", trackName)) { 2220 copy->release(); 2221 return ERROR_MALFORMED; 2222 } 2223 2224 if (!mIsAudio) { 2225 /* 2226 * Composition time: timestampUs 2227 * Decoding time: decodingTimeUs 2228 * Composition time offset = composition time - decoding time 2229 */ 2230 int64_t decodingTimeUs; 2231 CHECK(meta_data->findInt64(kKeyDecodingTime, &decodingTimeUs)); 2232 decodingTimeUs -= previousPausedDurationUs; 2233 cttsOffsetTimeUs = 2234 timestampUs + kMaxCttsOffsetTimeUs - decodingTimeUs; 2235 if (WARN_UNLESS(cttsOffsetTimeUs >= 0ll, "for %s track", trackName)) { 2236 copy->release(); 2237 return ERROR_MALFORMED; 2238 } 2239 2240 timestampUs = decodingTimeUs; 2241 ALOGV("decoding time: %lld and ctts offset time: %lld", 2242 timestampUs, cttsOffsetTimeUs); 2243 2244 // Update ctts box table if necessary 2245 currCttsOffsetTimeTicks = 2246 (cttsOffsetTimeUs * mTimeScale + 500000LL) / 1000000LL; 2247 if (WARN_UNLESS(currCttsOffsetTimeTicks <= 0x0FFFFFFFFLL, "for %s track", trackName)) { 2248 copy->release(); 2249 return ERROR_MALFORMED; 2250 } 2251 2252 if (mStszTableEntries->count() == 0) { 2253 // Force the first ctts table entry to have one single entry 2254 // so that we can do adjustment for the initial track start 2255 // time offset easily in writeCttsBox(). 2256 lastCttsOffsetTimeTicks = currCttsOffsetTimeTicks; 2257 addOneCttsTableEntry(1, currCttsOffsetTimeTicks); 2258 cttsSampleCount = 0; // No sample in ctts box is pending 2259 } else { 2260 if (currCttsOffsetTimeTicks != lastCttsOffsetTimeTicks) { 2261 addOneCttsTableEntry(cttsSampleCount, lastCttsOffsetTimeTicks); 2262 lastCttsOffsetTimeTicks = currCttsOffsetTimeTicks; 2263 cttsSampleCount = 1; // One sample in ctts box is pending 2264 } else { 2265 ++cttsSampleCount; 2266 } 2267 } 2268 2269 // Update ctts time offset range 2270 if (mStszTableEntries->count() == 0) { 2271 mMinCttsOffsetTimeUs = currCttsOffsetTimeTicks; 2272 mMaxCttsOffsetTimeUs = currCttsOffsetTimeTicks; 2273 } else { 2274 if (currCttsOffsetTimeTicks > mMaxCttsOffsetTimeUs) { 2275 mMaxCttsOffsetTimeUs = currCttsOffsetTimeTicks; 2276 } else if (currCttsOffsetTimeTicks < mMinCttsOffsetTimeUs) { 2277 mMinCttsOffsetTimeUs = currCttsOffsetTimeTicks; 2278 } 2279 } 2280 2281 } 2282 2283 if (mOwner->isRealTimeRecording()) { 2284 if (mIsAudio) { 2285 updateDriftTime(meta_data); 2286 } 2287 } 2288 2289 if (WARN_UNLESS(timestampUs >= 0ll, "for %s track", trackName)) { 2290 copy->release(); 2291 return ERROR_MALFORMED; 2292 } 2293 2294 ALOGV("%s media time stamp: %lld and previous paused duration %lld", 2295 trackName, timestampUs, previousPausedDurationUs); 2296 if (timestampUs > mTrackDurationUs) { 2297 mTrackDurationUs = timestampUs; 2298 } 2299 2300 // We need to use the time scale based ticks, rather than the 2301 // timestamp itself to determine whether we have to use a new 2302 // stts entry, since we may have rounding errors. 2303 // The calculation is intended to reduce the accumulated 2304 // rounding errors. 2305 currDurationTicks = 2306 ((timestampUs * mTimeScale + 500000LL) / 1000000LL - 2307 (lastTimestampUs * mTimeScale + 500000LL) / 1000000LL); 2308 if (currDurationTicks < 0ll) { 2309 ALOGE("timestampUs %lld < lastTimestampUs %lld for %s track", 2310 timestampUs, lastTimestampUs, trackName); 2311 copy->release(); 2312 return UNKNOWN_ERROR; 2313 } 2314 2315 // if the duration is different for this sample, see if it is close enough to the previous 2316 // duration that we can fudge it and use the same value, to avoid filling the stts table 2317 // with lots of near-identical entries. 2318 // "close enough" here means that the current duration needs to be adjusted by less 2319 // than 0.1 milliseconds 2320 if (lastDurationTicks && (currDurationTicks != lastDurationTicks)) { 2321 int64_t deltaUs = ((lastDurationTicks - currDurationTicks) * 1000000LL 2322 + (mTimeScale / 2)) / mTimeScale; 2323 if (deltaUs > -100 && deltaUs < 100) { 2324 // use previous ticks, and adjust timestamp as if it was actually that number 2325 // of ticks 2326 currDurationTicks = lastDurationTicks; 2327 timestampUs += deltaUs; 2328 } 2329 } 2330 2331 mStszTableEntries->add(htonl(sampleSize)); 2332 if (mStszTableEntries->count() > 2) { 2333 2334 // Force the first sample to have its own stts entry so that 2335 // we can adjust its value later to maintain the A/V sync. 2336 if (mStszTableEntries->count() == 3 || currDurationTicks != lastDurationTicks) { 2337 addOneSttsTableEntry(sampleCount, lastDurationTicks); 2338 sampleCount = 1; 2339 } else { 2340 ++sampleCount; 2341 } 2342 2343 } 2344 if (mSamplesHaveSameSize) { 2345 if (mStszTableEntries->count() >= 2 && previousSampleSize != sampleSize) { 2346 mSamplesHaveSameSize = false; 2347 } 2348 previousSampleSize = sampleSize; 2349 } 2350 ALOGV("%s timestampUs/lastTimestampUs: %lld/%lld", 2351 trackName, timestampUs, lastTimestampUs); 2352 lastDurationUs = timestampUs - lastTimestampUs; 2353 lastDurationTicks = currDurationTicks; 2354 lastTimestampUs = timestampUs; 2355 2356 if (isSync != 0) { 2357 addOneStssTableEntry(mStszTableEntries->count()); 2358 } 2359 2360 if (mTrackingProgressStatus) { 2361 if (mPreviousTrackTimeUs <= 0) { 2362 mPreviousTrackTimeUs = mStartTimestampUs; 2363 } 2364 trackProgressStatus(timestampUs); 2365 } 2366 if (!hasMultipleTracks) { 2367 off64_t offset = mIsAvc? mOwner->addLengthPrefixedSample_l(copy) 2368 : mOwner->addSample_l(copy); 2369 2370 uint32_t count = (mOwner->use32BitFileOffset() 2371 ? mStcoTableEntries->count() 2372 : mCo64TableEntries->count()); 2373 2374 if (count == 0) { 2375 addChunkOffset(offset); 2376 } 2377 copy->release(); 2378 copy = NULL; 2379 continue; 2380 } 2381 2382 mChunkSamples.push_back(copy); 2383 if (interleaveDurationUs == 0) { 2384 addOneStscTableEntry(++nChunks, 1); 2385 bufferChunk(timestampUs); 2386 } else { 2387 if (chunkTimestampUs == 0) { 2388 chunkTimestampUs = timestampUs; 2389 } else { 2390 int64_t chunkDurationUs = timestampUs - chunkTimestampUs; 2391 if (chunkDurationUs > interleaveDurationUs) { 2392 if (chunkDurationUs > mMaxChunkDurationUs) { 2393 mMaxChunkDurationUs = chunkDurationUs; 2394 } 2395 ++nChunks; 2396 if (nChunks == 1 || // First chunk 2397 lastSamplesPerChunk != mChunkSamples.size()) { 2398 lastSamplesPerChunk = mChunkSamples.size(); 2399 addOneStscTableEntry(nChunks, lastSamplesPerChunk); 2400 } 2401 bufferChunk(timestampUs); 2402 chunkTimestampUs = timestampUs; 2403 } 2404 } 2405 } 2406 2407 } 2408 2409 if (isTrackMalFormed()) { 2410 err = ERROR_MALFORMED; 2411 } 2412 2413 mOwner->trackProgressStatus(mTrackId, -1, err); 2414 2415 // Last chunk 2416 if (!hasMultipleTracks) { 2417 addOneStscTableEntry(1, mStszTableEntries->count()); 2418 } else if (!mChunkSamples.empty()) { 2419 addOneStscTableEntry(++nChunks, mChunkSamples.size()); 2420 bufferChunk(timestampUs); 2421 } 2422 2423 // We don't really know how long the last frame lasts, since 2424 // there is no frame time after it, just repeat the previous 2425 // frame's duration. 2426 if (mStszTableEntries->count() == 1) { 2427 lastDurationUs = 0; // A single sample's duration 2428 lastDurationTicks = 0; 2429 } else { 2430 ++sampleCount; // Count for the last sample 2431 } 2432 2433 if (mStszTableEntries->count() <= 2) { 2434 addOneSttsTableEntry(1, lastDurationTicks); 2435 if (sampleCount - 1 > 0) { 2436 addOneSttsTableEntry(sampleCount - 1, lastDurationTicks); 2437 } 2438 } else { 2439 addOneSttsTableEntry(sampleCount, lastDurationTicks); 2440 } 2441 2442 // The last ctts box may not have been written yet, and this 2443 // is to make sure that we write out the last ctts box. 2444 if (currCttsOffsetTimeTicks == lastCttsOffsetTimeTicks) { 2445 if (cttsSampleCount > 0) { 2446 addOneCttsTableEntry(cttsSampleCount, lastCttsOffsetTimeTicks); 2447 } 2448 } 2449 2450 mTrackDurationUs += lastDurationUs; 2451 mReachedEOS = true; 2452 2453 sendTrackSummary(hasMultipleTracks); 2454 2455 ALOGI("Received total/0-length (%d/%d) buffers and encoded %d frames. - %s", 2456 count, nZeroLengthFrames, mStszTableEntries->count(), trackName); 2457 if (mIsAudio) { 2458 ALOGI("Audio track drift time: %lld us", mOwner->getDriftTimeUs()); 2459 } 2460 2461 if (err == ERROR_END_OF_STREAM) { 2462 return OK; 2463 } 2464 return err; 2465} 2466 2467bool MPEG4Writer::Track::isTrackMalFormed() const { 2468 if (mStszTableEntries->count() == 0) { // no samples written 2469 ALOGE("The number of recorded samples is 0"); 2470 return true; 2471 } 2472 2473 if (!mIsAudio && mStssTableEntries->count() == 0) { // no sync frames for video 2474 ALOGE("There are no sync frames for video track"); 2475 return true; 2476 } 2477 2478 if (OK != checkCodecSpecificData()) { // no codec specific data 2479 return true; 2480 } 2481 2482 return false; 2483} 2484 2485void MPEG4Writer::Track::sendTrackSummary(bool hasMultipleTracks) { 2486 2487 // Send track summary only if test mode is enabled. 2488 if (!isTestModeEnabled()) { 2489 return; 2490 } 2491 2492 int trackNum = (mTrackId << 28); 2493 2494 mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2495 trackNum | MEDIA_RECORDER_TRACK_INFO_TYPE, 2496 mIsAudio? 0: 1); 2497 2498 mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2499 trackNum | MEDIA_RECORDER_TRACK_INFO_DURATION_MS, 2500 mTrackDurationUs / 1000); 2501 2502 mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2503 trackNum | MEDIA_RECORDER_TRACK_INFO_ENCODED_FRAMES, 2504 mStszTableEntries->count()); 2505 2506 { 2507 // The system delay time excluding the requested initial delay that 2508 // is used to eliminate the recording sound. 2509 int64_t startTimeOffsetUs = mOwner->getStartTimeOffsetMs() * 1000LL; 2510 if (startTimeOffsetUs < 0) { // Start time offset was not set 2511 startTimeOffsetUs = kInitialDelayTimeUs; 2512 } 2513 int64_t initialDelayUs = 2514 mFirstSampleTimeRealUs - mStartTimeRealUs - startTimeOffsetUs; 2515 2516 mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2517 trackNum | MEDIA_RECORDER_TRACK_INFO_INITIAL_DELAY_MS, 2518 (initialDelayUs) / 1000); 2519 } 2520 2521 mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2522 trackNum | MEDIA_RECORDER_TRACK_INFO_DATA_KBYTES, 2523 mMdatSizeBytes / 1024); 2524 2525 if (hasMultipleTracks) { 2526 mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2527 trackNum | MEDIA_RECORDER_TRACK_INFO_MAX_CHUNK_DUR_MS, 2528 mMaxChunkDurationUs / 1000); 2529 2530 int64_t moovStartTimeUs = mOwner->getStartTimestampUs(); 2531 if (mStartTimestampUs != moovStartTimeUs) { 2532 int64_t startTimeOffsetUs = mStartTimestampUs - moovStartTimeUs; 2533 mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2534 trackNum | MEDIA_RECORDER_TRACK_INFO_START_OFFSET_MS, 2535 startTimeOffsetUs / 1000); 2536 } 2537 } 2538} 2539 2540void MPEG4Writer::Track::trackProgressStatus(int64_t timeUs, status_t err) { 2541 ALOGV("trackProgressStatus: %lld us", timeUs); 2542 2543 if (mTrackEveryTimeDurationUs > 0 && 2544 timeUs - mPreviousTrackTimeUs >= mTrackEveryTimeDurationUs) { 2545 ALOGV("Fire time tracking progress status at %lld us", timeUs); 2546 mOwner->trackProgressStatus(mTrackId, timeUs - mPreviousTrackTimeUs, err); 2547 mPreviousTrackTimeUs = timeUs; 2548 } 2549} 2550 2551void MPEG4Writer::trackProgressStatus( 2552 size_t trackId, int64_t timeUs, status_t err) { 2553 Mutex::Autolock lock(mLock); 2554 int32_t trackNum = (trackId << 28); 2555 2556 // Error notification 2557 // Do not consider ERROR_END_OF_STREAM an error 2558 if (err != OK && err != ERROR_END_OF_STREAM) { 2559 notify(MEDIA_RECORDER_TRACK_EVENT_ERROR, 2560 trackNum | MEDIA_RECORDER_TRACK_ERROR_GENERAL, 2561 err); 2562 return; 2563 } 2564 2565 if (timeUs == -1) { 2566 // Send completion notification 2567 notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2568 trackNum | MEDIA_RECORDER_TRACK_INFO_COMPLETION_STATUS, 2569 err); 2570 } else { 2571 // Send progress status 2572 notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2573 trackNum | MEDIA_RECORDER_TRACK_INFO_PROGRESS_IN_TIME, 2574 timeUs / 1000); 2575 } 2576} 2577 2578void MPEG4Writer::setDriftTimeUs(int64_t driftTimeUs) { 2579 ALOGV("setDriftTimeUs: %lld us", driftTimeUs); 2580 Mutex::Autolock autolock(mLock); 2581 mDriftTimeUs = driftTimeUs; 2582} 2583 2584int64_t MPEG4Writer::getDriftTimeUs() { 2585 ALOGV("getDriftTimeUs: %lld us", mDriftTimeUs); 2586 Mutex::Autolock autolock(mLock); 2587 return mDriftTimeUs; 2588} 2589 2590bool MPEG4Writer::isRealTimeRecording() const { 2591 return mIsRealTimeRecording; 2592} 2593 2594bool MPEG4Writer::useNalLengthFour() { 2595 return mUse4ByteNalLength; 2596} 2597 2598void MPEG4Writer::Track::bufferChunk(int64_t timestampUs) { 2599 ALOGV("bufferChunk"); 2600 2601 Chunk chunk(this, timestampUs, mChunkSamples); 2602 mOwner->bufferChunk(chunk); 2603 mChunkSamples.clear(); 2604} 2605 2606int64_t MPEG4Writer::Track::getDurationUs() const { 2607 return mTrackDurationUs; 2608} 2609 2610int64_t MPEG4Writer::Track::getEstimatedTrackSizeBytes() const { 2611 return mEstimatedTrackSizeBytes; 2612} 2613 2614status_t MPEG4Writer::Track::checkCodecSpecificData() const { 2615 const char *mime; 2616 CHECK(mMeta->findCString(kKeyMIMEType, &mime)); 2617 if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AAC, mime) || 2618 !strcasecmp(MEDIA_MIMETYPE_VIDEO_MPEG4, mime) || 2619 !strcasecmp(MEDIA_MIMETYPE_VIDEO_AVC, mime)) { 2620 if (!mCodecSpecificData || 2621 mCodecSpecificDataSize <= 0) { 2622 ALOGE("Missing codec specific data"); 2623 return ERROR_MALFORMED; 2624 } 2625 } else { 2626 if (mCodecSpecificData || 2627 mCodecSpecificDataSize > 0) { 2628 ALOGE("Unexepected codec specific data found"); 2629 return ERROR_MALFORMED; 2630 } 2631 } 2632 return OK; 2633} 2634 2635void MPEG4Writer::Track::writeTrackHeader(bool use32BitOffset) { 2636 2637 ALOGV("%s track time scale: %d", 2638 mIsAudio? "Audio": "Video", mTimeScale); 2639 2640 uint32_t now = getMpeg4Time(); 2641 mOwner->beginBox("trak"); 2642 writeTkhdBox(now); 2643 mOwner->beginBox("mdia"); 2644 writeMdhdBox(now); 2645 writeHdlrBox(); 2646 mOwner->beginBox("minf"); 2647 if (mIsAudio) { 2648 writeSmhdBox(); 2649 } else { 2650 writeVmhdBox(); 2651 } 2652 writeDinfBox(); 2653 writeStblBox(use32BitOffset); 2654 mOwner->endBox(); // minf 2655 mOwner->endBox(); // mdia 2656 mOwner->endBox(); // trak 2657} 2658 2659void MPEG4Writer::Track::writeStblBox(bool use32BitOffset) { 2660 mOwner->beginBox("stbl"); 2661 mOwner->beginBox("stsd"); 2662 mOwner->writeInt32(0); // version=0, flags=0 2663 mOwner->writeInt32(1); // entry count 2664 if (mIsAudio) { 2665 writeAudioFourCCBox(); 2666 } else { 2667 writeVideoFourCCBox(); 2668 } 2669 mOwner->endBox(); // stsd 2670 writeSttsBox(); 2671 writeCttsBox(); 2672 if (!mIsAudio) { 2673 writeStssBox(); 2674 } 2675 writeStszBox(); 2676 writeStscBox(); 2677 writeStcoBox(use32BitOffset); 2678 mOwner->endBox(); // stbl 2679} 2680 2681void MPEG4Writer::Track::writeVideoFourCCBox() { 2682 const char *mime; 2683 bool success = mMeta->findCString(kKeyMIMEType, &mime); 2684 CHECK(success); 2685 if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_MPEG4, mime)) { 2686 mOwner->beginBox("mp4v"); 2687 } else if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_H263, mime)) { 2688 mOwner->beginBox("s263"); 2689 } else if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_AVC, mime)) { 2690 mOwner->beginBox("avc1"); 2691 } else { 2692 ALOGE("Unknown mime type '%s'.", mime); 2693 CHECK(!"should not be here, unknown mime type."); 2694 } 2695 2696 mOwner->writeInt32(0); // reserved 2697 mOwner->writeInt16(0); // reserved 2698 mOwner->writeInt16(1); // data ref index 2699 mOwner->writeInt16(0); // predefined 2700 mOwner->writeInt16(0); // reserved 2701 mOwner->writeInt32(0); // predefined 2702 mOwner->writeInt32(0); // predefined 2703 mOwner->writeInt32(0); // predefined 2704 2705 int32_t width, height; 2706 success = mMeta->findInt32(kKeyWidth, &width); 2707 success = success && mMeta->findInt32(kKeyHeight, &height); 2708 CHECK(success); 2709 2710 mOwner->writeInt16(width); 2711 mOwner->writeInt16(height); 2712 mOwner->writeInt32(0x480000); // horiz resolution 2713 mOwner->writeInt32(0x480000); // vert resolution 2714 mOwner->writeInt32(0); // reserved 2715 mOwner->writeInt16(1); // frame count 2716 mOwner->writeInt8(0); // compressor string length 2717 mOwner->write(" ", 31); 2718 mOwner->writeInt16(0x18); // depth 2719 mOwner->writeInt16(-1); // predefined 2720 2721 CHECK_LT(23 + mCodecSpecificDataSize, 128); 2722 2723 if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_MPEG4, mime)) { 2724 writeMp4vEsdsBox(); 2725 } else if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_H263, mime)) { 2726 writeD263Box(); 2727 } else if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_AVC, mime)) { 2728 writeAvccBox(); 2729 } 2730 2731 writePaspBox(); 2732 mOwner->endBox(); // mp4v, s263 or avc1 2733} 2734 2735void MPEG4Writer::Track::writeAudioFourCCBox() { 2736 const char *mime; 2737 bool success = mMeta->findCString(kKeyMIMEType, &mime); 2738 CHECK(success); 2739 const char *fourcc = NULL; 2740 if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AMR_NB, mime)) { 2741 fourcc = "samr"; 2742 } else if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AMR_WB, mime)) { 2743 fourcc = "sawb"; 2744 } else if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AAC, mime)) { 2745 fourcc = "mp4a"; 2746 } else { 2747 ALOGE("Unknown mime type '%s'.", mime); 2748 CHECK(!"should not be here, unknown mime type."); 2749 } 2750 2751 mOwner->beginBox(fourcc); // audio format 2752 mOwner->writeInt32(0); // reserved 2753 mOwner->writeInt16(0); // reserved 2754 mOwner->writeInt16(0x1); // data ref index 2755 mOwner->writeInt32(0); // reserved 2756 mOwner->writeInt32(0); // reserved 2757 int32_t nChannels; 2758 CHECK_EQ(true, mMeta->findInt32(kKeyChannelCount, &nChannels)); 2759 mOwner->writeInt16(nChannels); // channel count 2760 mOwner->writeInt16(16); // sample size 2761 mOwner->writeInt16(0); // predefined 2762 mOwner->writeInt16(0); // reserved 2763 2764 int32_t samplerate; 2765 success = mMeta->findInt32(kKeySampleRate, &samplerate); 2766 CHECK(success); 2767 mOwner->writeInt32(samplerate << 16); 2768 if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AAC, mime)) { 2769 writeMp4aEsdsBox(); 2770 } else if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AMR_NB, mime) || 2771 !strcasecmp(MEDIA_MIMETYPE_AUDIO_AMR_WB, mime)) { 2772 writeDamrBox(); 2773 } 2774 mOwner->endBox(); 2775} 2776 2777void MPEG4Writer::Track::writeMp4aEsdsBox() { 2778 mOwner->beginBox("esds"); 2779 CHECK(mCodecSpecificData); 2780 CHECK_GT(mCodecSpecificDataSize, 0); 2781 2782 // Make sure all sizes encode to a single byte. 2783 CHECK_LT(mCodecSpecificDataSize + 23, 128); 2784 2785 mOwner->writeInt32(0); // version=0, flags=0 2786 mOwner->writeInt8(0x03); // ES_DescrTag 2787 mOwner->writeInt8(23 + mCodecSpecificDataSize); 2788 mOwner->writeInt16(0x0000);// ES_ID 2789 mOwner->writeInt8(0x00); 2790 2791 mOwner->writeInt8(0x04); // DecoderConfigDescrTag 2792 mOwner->writeInt8(15 + mCodecSpecificDataSize); 2793 mOwner->writeInt8(0x40); // objectTypeIndication ISO/IEC 14492-2 2794 mOwner->writeInt8(0x15); // streamType AudioStream 2795 2796 mOwner->writeInt16(0x03); // XXX 2797 mOwner->writeInt8(0x00); // buffer size 24-bit 2798 mOwner->writeInt32(96000); // max bit rate 2799 mOwner->writeInt32(96000); // avg bit rate 2800 2801 mOwner->writeInt8(0x05); // DecoderSpecificInfoTag 2802 mOwner->writeInt8(mCodecSpecificDataSize); 2803 mOwner->write(mCodecSpecificData, mCodecSpecificDataSize); 2804 2805 static const uint8_t kData2[] = { 2806 0x06, // SLConfigDescriptorTag 2807 0x01, 2808 0x02 2809 }; 2810 mOwner->write(kData2, sizeof(kData2)); 2811 2812 mOwner->endBox(); // esds 2813} 2814 2815void MPEG4Writer::Track::writeMp4vEsdsBox() { 2816 CHECK(mCodecSpecificData); 2817 CHECK_GT(mCodecSpecificDataSize, 0); 2818 mOwner->beginBox("esds"); 2819 2820 mOwner->writeInt32(0); // version=0, flags=0 2821 2822 mOwner->writeInt8(0x03); // ES_DescrTag 2823 mOwner->writeInt8(23 + mCodecSpecificDataSize); 2824 mOwner->writeInt16(0x0000); // ES_ID 2825 mOwner->writeInt8(0x1f); 2826 2827 mOwner->writeInt8(0x04); // DecoderConfigDescrTag 2828 mOwner->writeInt8(15 + mCodecSpecificDataSize); 2829 mOwner->writeInt8(0x20); // objectTypeIndication ISO/IEC 14492-2 2830 mOwner->writeInt8(0x11); // streamType VisualStream 2831 2832 static const uint8_t kData[] = { 2833 0x01, 0x77, 0x00, 2834 0x00, 0x03, 0xe8, 0x00, 2835 0x00, 0x03, 0xe8, 0x00 2836 }; 2837 mOwner->write(kData, sizeof(kData)); 2838 2839 mOwner->writeInt8(0x05); // DecoderSpecificInfoTag 2840 2841 mOwner->writeInt8(mCodecSpecificDataSize); 2842 mOwner->write(mCodecSpecificData, mCodecSpecificDataSize); 2843 2844 static const uint8_t kData2[] = { 2845 0x06, // SLConfigDescriptorTag 2846 0x01, 2847 0x02 2848 }; 2849 mOwner->write(kData2, sizeof(kData2)); 2850 2851 mOwner->endBox(); // esds 2852} 2853 2854void MPEG4Writer::Track::writeTkhdBox(uint32_t now) { 2855 mOwner->beginBox("tkhd"); 2856 // Flags = 7 to indicate that the track is enabled, and 2857 // part of the presentation 2858 mOwner->writeInt32(0x07); // version=0, flags=7 2859 mOwner->writeInt32(now); // creation time 2860 mOwner->writeInt32(now); // modification time 2861 mOwner->writeInt32(mTrackId); // track id starts with 1 2862 mOwner->writeInt32(0); // reserved 2863 int64_t trakDurationUs = getDurationUs(); 2864 int32_t mvhdTimeScale = mOwner->getTimeScale(); 2865 int32_t tkhdDuration = 2866 (trakDurationUs * mvhdTimeScale + 5E5) / 1E6; 2867 mOwner->writeInt32(tkhdDuration); // in mvhd timescale 2868 mOwner->writeInt32(0); // reserved 2869 mOwner->writeInt32(0); // reserved 2870 mOwner->writeInt16(0); // layer 2871 mOwner->writeInt16(0); // alternate group 2872 mOwner->writeInt16(mIsAudio ? 0x100 : 0); // volume 2873 mOwner->writeInt16(0); // reserved 2874 2875 mOwner->writeCompositionMatrix(mRotation); // matrix 2876 2877 if (mIsAudio) { 2878 mOwner->writeInt32(0); 2879 mOwner->writeInt32(0); 2880 } else { 2881 int32_t width, height; 2882 bool success = mMeta->findInt32(kKeyWidth, &width); 2883 success = success && mMeta->findInt32(kKeyHeight, &height); 2884 CHECK(success); 2885 2886 mOwner->writeInt32(width << 16); // 32-bit fixed-point value 2887 mOwner->writeInt32(height << 16); // 32-bit fixed-point value 2888 } 2889 mOwner->endBox(); // tkhd 2890} 2891 2892void MPEG4Writer::Track::writeVmhdBox() { 2893 mOwner->beginBox("vmhd"); 2894 mOwner->writeInt32(0x01); // version=0, flags=1 2895 mOwner->writeInt16(0); // graphics mode 2896 mOwner->writeInt16(0); // opcolor 2897 mOwner->writeInt16(0); 2898 mOwner->writeInt16(0); 2899 mOwner->endBox(); 2900} 2901 2902void MPEG4Writer::Track::writeSmhdBox() { 2903 mOwner->beginBox("smhd"); 2904 mOwner->writeInt32(0); // version=0, flags=0 2905 mOwner->writeInt16(0); // balance 2906 mOwner->writeInt16(0); // reserved 2907 mOwner->endBox(); 2908} 2909 2910void MPEG4Writer::Track::writeHdlrBox() { 2911 mOwner->beginBox("hdlr"); 2912 mOwner->writeInt32(0); // version=0, flags=0 2913 mOwner->writeInt32(0); // component type: should be mhlr 2914 mOwner->writeFourcc(mIsAudio ? "soun" : "vide"); // component subtype 2915 mOwner->writeInt32(0); // reserved 2916 mOwner->writeInt32(0); // reserved 2917 mOwner->writeInt32(0); // reserved 2918 // Removing "r" for the name string just makes the string 4 byte aligned 2919 mOwner->writeCString(mIsAudio ? "SoundHandle": "VideoHandle"); // name 2920 mOwner->endBox(); 2921} 2922 2923void MPEG4Writer::Track::writeMdhdBox(uint32_t now) { 2924 int64_t trakDurationUs = getDurationUs(); 2925 mOwner->beginBox("mdhd"); 2926 mOwner->writeInt32(0); // version=0, flags=0 2927 mOwner->writeInt32(now); // creation time 2928 mOwner->writeInt32(now); // modification time 2929 mOwner->writeInt32(mTimeScale); // media timescale 2930 int32_t mdhdDuration = (trakDurationUs * mTimeScale + 5E5) / 1E6; 2931 mOwner->writeInt32(mdhdDuration); // use media timescale 2932 // Language follows the three letter standard ISO-639-2/T 2933 // 'e', 'n', 'g' for "English", for instance. 2934 // Each character is packed as the difference between its ASCII value and 0x60. 2935 // For "English", these are 00101, 01110, 00111. 2936 // XXX: Where is the padding bit located: 0x15C7? 2937 mOwner->writeInt16(0); // language code 2938 mOwner->writeInt16(0); // predefined 2939 mOwner->endBox(); 2940} 2941 2942void MPEG4Writer::Track::writeDamrBox() { 2943 // 3gpp2 Spec AMRSampleEntry fields 2944 mOwner->beginBox("damr"); 2945 mOwner->writeCString(" "); // vendor: 4 bytes 2946 mOwner->writeInt8(0); // decoder version 2947 mOwner->writeInt16(0x83FF); // mode set: all enabled 2948 mOwner->writeInt8(0); // mode change period 2949 mOwner->writeInt8(1); // frames per sample 2950 mOwner->endBox(); 2951} 2952 2953void MPEG4Writer::Track::writeUrlBox() { 2954 // The table index here refers to the sample description index 2955 // in the sample table entries. 2956 mOwner->beginBox("url "); 2957 mOwner->writeInt32(1); // version=0, flags=1 (self-contained) 2958 mOwner->endBox(); // url 2959} 2960 2961void MPEG4Writer::Track::writeDrefBox() { 2962 mOwner->beginBox("dref"); 2963 mOwner->writeInt32(0); // version=0, flags=0 2964 mOwner->writeInt32(1); // entry count (either url or urn) 2965 writeUrlBox(); 2966 mOwner->endBox(); // dref 2967} 2968 2969void MPEG4Writer::Track::writeDinfBox() { 2970 mOwner->beginBox("dinf"); 2971 writeDrefBox(); 2972 mOwner->endBox(); // dinf 2973} 2974 2975void MPEG4Writer::Track::writeAvccBox() { 2976 CHECK(mCodecSpecificData); 2977 CHECK_GE(mCodecSpecificDataSize, 5); 2978 2979 // Patch avcc's lengthSize field to match the number 2980 // of bytes we use to indicate the size of a nal unit. 2981 uint8_t *ptr = (uint8_t *)mCodecSpecificData; 2982 ptr[4] = (ptr[4] & 0xfc) | (mOwner->useNalLengthFour() ? 3 : 1); 2983 mOwner->beginBox("avcC"); 2984 mOwner->write(mCodecSpecificData, mCodecSpecificDataSize); 2985 mOwner->endBox(); // avcC 2986} 2987 2988void MPEG4Writer::Track::writeD263Box() { 2989 mOwner->beginBox("d263"); 2990 mOwner->writeInt32(0); // vendor 2991 mOwner->writeInt8(0); // decoder version 2992 mOwner->writeInt8(10); // level: 10 2993 mOwner->writeInt8(0); // profile: 0 2994 mOwner->endBox(); // d263 2995} 2996 2997// This is useful if the pixel is not square 2998void MPEG4Writer::Track::writePaspBox() { 2999 mOwner->beginBox("pasp"); 3000 mOwner->writeInt32(1 << 16); // hspacing 3001 mOwner->writeInt32(1 << 16); // vspacing 3002 mOwner->endBox(); // pasp 3003} 3004 3005int32_t MPEG4Writer::Track::getStartTimeOffsetScaledTime() const { 3006 int64_t trackStartTimeOffsetUs = 0; 3007 int64_t moovStartTimeUs = mOwner->getStartTimestampUs(); 3008 if (mStartTimestampUs != moovStartTimeUs) { 3009 CHECK_GT(mStartTimestampUs, moovStartTimeUs); 3010 trackStartTimeOffsetUs = mStartTimestampUs - moovStartTimeUs; 3011 } 3012 return (trackStartTimeOffsetUs * mTimeScale + 500000LL) / 1000000LL; 3013} 3014 3015void MPEG4Writer::Track::writeSttsBox() { 3016 mOwner->beginBox("stts"); 3017 mOwner->writeInt32(0); // version=0, flags=0 3018 uint32_t duration; 3019 CHECK(mSttsTableEntries->get(duration, 1)); 3020 duration = htonl(duration); // Back to host byte order 3021 mSttsTableEntries->set(htonl(duration + getStartTimeOffsetScaledTime()), 1); 3022 mSttsTableEntries->write(mOwner); 3023 mOwner->endBox(); // stts 3024} 3025 3026void MPEG4Writer::Track::writeCttsBox() { 3027 if (mIsAudio) { // ctts is not for audio 3028 return; 3029 } 3030 3031 // There is no B frame at all 3032 if (mMinCttsOffsetTimeUs == mMaxCttsOffsetTimeUs) { 3033 return; 3034 } 3035 3036 // Do not write ctts box when there is no need to have it. 3037 if (mCttsTableEntries->count() == 0) { 3038 return; 3039 } 3040 3041 ALOGV("ctts box has %d entries with range [%lld, %lld]", 3042 mCttsTableEntries->count(), mMinCttsOffsetTimeUs, mMaxCttsOffsetTimeUs); 3043 3044 mOwner->beginBox("ctts"); 3045 mOwner->writeInt32(0); // version=0, flags=0 3046 uint32_t duration; 3047 CHECK(mCttsTableEntries->get(duration, 1)); 3048 duration = htonl(duration); // Back host byte order 3049 mCttsTableEntries->set(htonl(duration + getStartTimeOffsetScaledTime() - mMinCttsOffsetTimeUs), 1); 3050 mCttsTableEntries->write(mOwner); 3051 mOwner->endBox(); // ctts 3052} 3053 3054void MPEG4Writer::Track::writeStssBox() { 3055 mOwner->beginBox("stss"); 3056 mOwner->writeInt32(0); // version=0, flags=0 3057 mStssTableEntries->write(mOwner); 3058 mOwner->endBox(); // stss 3059} 3060 3061void MPEG4Writer::Track::writeStszBox() { 3062 mOwner->beginBox("stsz"); 3063 mOwner->writeInt32(0); // version=0, flags=0 3064 mOwner->writeInt32(0); 3065 mStszTableEntries->write(mOwner); 3066 mOwner->endBox(); // stsz 3067} 3068 3069void MPEG4Writer::Track::writeStscBox() { 3070 mOwner->beginBox("stsc"); 3071 mOwner->writeInt32(0); // version=0, flags=0 3072 mStscTableEntries->write(mOwner); 3073 mOwner->endBox(); // stsc 3074} 3075 3076void MPEG4Writer::Track::writeStcoBox(bool use32BitOffset) { 3077 mOwner->beginBox(use32BitOffset? "stco": "co64"); 3078 mOwner->writeInt32(0); // version=0, flags=0 3079 if (use32BitOffset) { 3080 mStcoTableEntries->write(mOwner); 3081 } else { 3082 mCo64TableEntries->write(mOwner); 3083 } 3084 mOwner->endBox(); // stco or co64 3085} 3086 3087void MPEG4Writer::writeUdtaBox() { 3088 beginBox("udta"); 3089 writeGeoDataBox(); 3090 endBox(); 3091} 3092 3093/* 3094 * Geodata is stored according to ISO-6709 standard. 3095 */ 3096void MPEG4Writer::writeGeoDataBox() { 3097 beginBox("\xA9xyz"); 3098 /* 3099 * For historical reasons, any user data start 3100 * with "\0xA9", must be followed by its assoicated 3101 * language code. 3102 * 0x0012: text string length 3103 * 0x15c7: lang (locale) code: en 3104 */ 3105 writeInt32(0x001215c7); 3106 writeLatitude(mLatitudex10000); 3107 writeLongitude(mLongitudex10000); 3108 writeInt8(0x2F); 3109 endBox(); 3110} 3111 3112} // namespace android 3113