MPEG4Writer.cpp revision 219f195159f93d627af2b243732e3f9020511a46
1/* 2 * Copyright (C) 2009 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17//#define LOG_NDEBUG 0 18#define LOG_TAG "MPEG4Writer" 19#include <utils/Log.h> 20 21#include <arpa/inet.h> 22 23#include <pthread.h> 24#include <sys/prctl.h> 25 26#include <media/stagefright/foundation/ADebug.h> 27#include <media/stagefright/MPEG4Writer.h> 28#include <media/stagefright/MediaBuffer.h> 29#include <media/stagefright/MetaData.h> 30#include <media/stagefright/MediaDefs.h> 31#include <media/stagefright/MediaErrors.h> 32#include <media/stagefright/MediaSource.h> 33#include <media/stagefright/Utils.h> 34#include <media/mediarecorder.h> 35#include <cutils/properties.h> 36#include <sys/types.h> 37#include <sys/stat.h> 38#include <fcntl.h> 39#include <unistd.h> 40 41#include "include/ESDS.h" 42 43namespace android { 44 45static const int64_t kMinStreamableFileSizeInBytes = 5 * 1024 * 1024; 46static const int64_t kMax32BitFileSize = 0x007fffffffLL; 47static const uint8_t kNalUnitTypeSeqParamSet = 0x07; 48static const uint8_t kNalUnitTypePicParamSet = 0x08; 49static const int64_t kInitialDelayTimeUs = 700000LL; 50 51class MPEG4Writer::Track { 52public: 53 Track(MPEG4Writer *owner, const sp<MediaSource> &source, size_t trackId); 54 55 ~Track(); 56 57 status_t start(MetaData *params); 58 status_t stop(); 59 status_t pause(); 60 bool reachedEOS(); 61 62 int64_t getDurationUs() const; 63 int64_t getEstimatedTrackSizeBytes() const; 64 void writeTrackHeader(bool use32BitOffset = true); 65 void bufferChunk(int64_t timestampUs); 66 bool isAvc() const { return mIsAvc; } 67 bool isAudio() const { return mIsAudio; } 68 bool isMPEG4() const { return mIsMPEG4; } 69 void addChunkOffset(off64_t offset); 70 int32_t getTrackId() const { return mTrackId; } 71 status_t dump(int fd, const Vector<String16>& args) const; 72 73private: 74 enum { 75 kMaxCttsOffsetTimeUs = 1000000LL, // 1 second 76 kSampleArraySize = 1000, 77 }; 78 79 // A helper class to handle faster write box with table entries 80 template<class TYPE> 81 struct ListTableEntries { 82 ListTableEntries(uint32_t elementCapacity, uint32_t entryCapacity) 83 : mElementCapacity(elementCapacity), 84 mEntryCapacity(entryCapacity), 85 mTotalNumTableEntries(0), 86 mNumValuesInCurrEntry(0), 87 mCurrTableEntriesElement(NULL) { 88 CHECK_GT(mElementCapacity, 0); 89 CHECK_GT(mEntryCapacity, 0); 90 } 91 92 // Free the allocated memory. 93 ~ListTableEntries() { 94 while (!mTableEntryList.empty()) { 95 typename List<TYPE *>::iterator it = mTableEntryList.begin(); 96 delete[] (*it); 97 mTableEntryList.erase(it); 98 } 99 } 100 101 // Replace the value at the given position by the given value. 102 // There must be an existing value at the given position. 103 // @arg value must be in network byte order 104 // @arg pos location the value must be in. 105 void set(const TYPE& value, uint32_t pos) { 106 CHECK_LT(pos, mTotalNumTableEntries * mEntryCapacity); 107 108 typename List<TYPE *>::iterator it = mTableEntryList.begin(); 109 uint32_t iterations = (pos / (mElementCapacity * mEntryCapacity)); 110 while (it != mTableEntryList.end() && iterations > 0) { 111 ++it; 112 --iterations; 113 } 114 CHECK(it != mTableEntryList.end()); 115 CHECK_EQ(iterations, 0); 116 117 (*it)[(pos % (mElementCapacity * mEntryCapacity))] = value; 118 } 119 120 // Get the value at the given position by the given value. 121 // @arg value the retrieved value at the position in network byte order. 122 // @arg pos location the value must be in. 123 // @return true if a value is found. 124 bool get(TYPE& value, uint32_t pos) const { 125 if (pos >= mTotalNumTableEntries * mEntryCapacity) { 126 return false; 127 } 128 129 typename List<TYPE *>::iterator it = mTableEntryList.begin(); 130 uint32_t iterations = (pos / (mElementCapacity * mEntryCapacity)); 131 while (it != mTableEntryList.end() && iterations > 0) { 132 ++it; 133 --iterations; 134 } 135 CHECK(it != mTableEntryList.end()); 136 CHECK_EQ(iterations, 0); 137 138 value = (*it)[(pos % (mElementCapacity * mEntryCapacity))]; 139 return true; 140 } 141 142 // Store a single value. 143 // @arg value must be in network byte order. 144 void add(const TYPE& value) { 145 CHECK_LT(mNumValuesInCurrEntry, mElementCapacity); 146 uint32_t nEntries = mTotalNumTableEntries % mElementCapacity; 147 uint32_t nValues = mNumValuesInCurrEntry % mEntryCapacity; 148 if (nEntries == 0 && nValues == 0) { 149 mCurrTableEntriesElement = new TYPE[mEntryCapacity * mElementCapacity]; 150 CHECK(mCurrTableEntriesElement != NULL); 151 mTableEntryList.push_back(mCurrTableEntriesElement); 152 } 153 154 uint32_t pos = nEntries * mEntryCapacity + nValues; 155 mCurrTableEntriesElement[pos] = value; 156 157 ++mNumValuesInCurrEntry; 158 if ((mNumValuesInCurrEntry % mEntryCapacity) == 0) { 159 ++mTotalNumTableEntries; 160 mNumValuesInCurrEntry = 0; 161 } 162 } 163 164 // Write out the table entries: 165 // 1. the number of entries goes first 166 // 2. followed by the values in the table enties in order 167 // @arg writer the writer to actual write to the storage 168 void write(MPEG4Writer *writer) const { 169 CHECK_EQ(mNumValuesInCurrEntry % mEntryCapacity, 0); 170 uint32_t nEntries = mTotalNumTableEntries; 171 writer->writeInt32(nEntries); 172 for (typename List<TYPE *>::iterator it = mTableEntryList.begin(); 173 it != mTableEntryList.end(); ++it) { 174 CHECK_GT(nEntries, 0); 175 if (nEntries >= mElementCapacity) { 176 writer->write(*it, sizeof(TYPE) * mEntryCapacity, mElementCapacity); 177 nEntries -= mElementCapacity; 178 } else { 179 writer->write(*it, sizeof(TYPE) * mEntryCapacity, nEntries); 180 break; 181 } 182 } 183 } 184 185 // Return the number of entries in the table. 186 uint32_t count() const { return mTotalNumTableEntries; } 187 188 private: 189 uint32_t mElementCapacity; // # entries in an element 190 uint32_t mEntryCapacity; // # of values in each entry 191 uint32_t mTotalNumTableEntries; 192 uint32_t mNumValuesInCurrEntry; // up to mEntryCapacity 193 TYPE *mCurrTableEntriesElement; 194 mutable List<TYPE *> mTableEntryList; 195 196 DISALLOW_EVIL_CONSTRUCTORS(ListTableEntries); 197 }; 198 199 200 201 MPEG4Writer *mOwner; 202 sp<MetaData> mMeta; 203 sp<MediaSource> mSource; 204 volatile bool mDone; 205 volatile bool mPaused; 206 volatile bool mResumed; 207 volatile bool mStarted; 208 bool mIsAvc; 209 bool mIsAudio; 210 bool mIsMPEG4; 211 int32_t mTrackId; 212 int64_t mTrackDurationUs; 213 int64_t mMaxChunkDurationUs; 214 215 bool mIsRealTimeRecording; 216 int64_t mEstimatedTrackSizeBytes; 217 int64_t mMdatSizeBytes; 218 int32_t mTimeScale; 219 220 pthread_t mThread; 221 222 223 List<MediaBuffer *> mChunkSamples; 224 225 bool mSamplesHaveSameSize; 226 ListTableEntries<uint32_t> *mStszTableEntries; 227 228 ListTableEntries<uint32_t> *mStcoTableEntries; 229 ListTableEntries<off64_t> *mCo64TableEntries; 230 ListTableEntries<uint32_t> *mStscTableEntries; 231 ListTableEntries<uint32_t> *mStssTableEntries; 232 ListTableEntries<uint32_t> *mSttsTableEntries; 233 ListTableEntries<uint32_t> *mCttsTableEntries; 234 235 int64_t mMinCttsOffsetTimeUs; 236 int64_t mMaxCttsOffsetTimeUs; 237 238 // Sequence parameter set or picture parameter set 239 struct AVCParamSet { 240 AVCParamSet(uint16_t length, const uint8_t *data) 241 : mLength(length), mData(data) {} 242 243 uint16_t mLength; 244 const uint8_t *mData; 245 }; 246 List<AVCParamSet> mSeqParamSets; 247 List<AVCParamSet> mPicParamSets; 248 uint8_t mProfileIdc; 249 uint8_t mProfileCompatible; 250 uint8_t mLevelIdc; 251 252 void *mCodecSpecificData; 253 size_t mCodecSpecificDataSize; 254 bool mGotAllCodecSpecificData; 255 bool mTrackingProgressStatus; 256 257 bool mReachedEOS; 258 int64_t mStartTimestampUs; 259 int64_t mStartTimeRealUs; 260 int64_t mFirstSampleTimeRealUs; 261 int64_t mPreviousTrackTimeUs; 262 int64_t mTrackEveryTimeDurationUs; 263 264 // Update the audio track's drift information. 265 void updateDriftTime(const sp<MetaData>& meta); 266 267 int32_t getStartTimeOffsetScaledTime() const; 268 269 static void *ThreadWrapper(void *me); 270 status_t threadEntry(); 271 272 const uint8_t *parseParamSet( 273 const uint8_t *data, size_t length, int type, size_t *paramSetLen); 274 275 status_t makeAVCCodecSpecificData(const uint8_t *data, size_t size); 276 status_t copyAVCCodecSpecificData(const uint8_t *data, size_t size); 277 status_t parseAVCCodecSpecificData(const uint8_t *data, size_t size); 278 279 // Track authoring progress status 280 void trackProgressStatus(int64_t timeUs, status_t err = OK); 281 void initTrackingProgressStatus(MetaData *params); 282 283 void getCodecSpecificDataFromInputFormatIfPossible(); 284 285 // Determine the track time scale 286 // If it is an audio track, try to use the sampling rate as 287 // the time scale; however, if user chooses the overwrite 288 // value, the user-supplied time scale will be used. 289 void setTimeScale(); 290 291 // Simple validation on the codec specific data 292 status_t checkCodecSpecificData() const; 293 int32_t mRotation; 294 295 void updateTrackSizeEstimate(); 296 void addOneStscTableEntry(size_t chunkId, size_t sampleId); 297 void addOneStssTableEntry(size_t sampleId); 298 299 // Duration is time scale based 300 void addOneSttsTableEntry(size_t sampleCount, int32_t timescaledDur); 301 void addOneCttsTableEntry(size_t sampleCount, int32_t timescaledDur); 302 303 bool isTrackMalFormed() const; 304 void sendTrackSummary(bool hasMultipleTracks); 305 306 // Write the boxes 307 void writeStcoBox(bool use32BitOffset); 308 void writeStscBox(); 309 void writeStszBox(); 310 void writeStssBox(); 311 void writeSttsBox(); 312 void writeCttsBox(); 313 void writeD263Box(); 314 void writePaspBox(); 315 void writeAvccBox(); 316 void writeUrlBox(); 317 void writeDrefBox(); 318 void writeDinfBox(); 319 void writeDamrBox(); 320 void writeMdhdBox(time_t now); 321 void writeSmhdBox(); 322 void writeVmhdBox(); 323 void writeHdlrBox(); 324 void writeTkhdBox(time_t now); 325 void writeMp4aEsdsBox(); 326 void writeMp4vEsdsBox(); 327 void writeAudioFourCCBox(); 328 void writeVideoFourCCBox(); 329 void writeStblBox(bool use32BitOffset); 330 331 Track(const Track &); 332 Track &operator=(const Track &); 333}; 334 335MPEG4Writer::MPEG4Writer(const char *filename) 336 : mFd(-1), 337 mInitCheck(NO_INIT), 338 mUse4ByteNalLength(true), 339 mUse32BitOffset(true), 340 mIsFileSizeLimitExplicitlyRequested(false), 341 mPaused(false), 342 mStarted(false), 343 mWriterThreadStarted(false), 344 mOffset(0), 345 mMdatOffset(0), 346 mEstimatedMoovBoxSize(0), 347 mInterleaveDurationUs(1000000), 348 mLatitudex10000(0), 349 mLongitudex10000(0), 350 mAreGeoTagsAvailable(false), 351 mStartTimeOffsetMs(-1) { 352 353 mFd = open(filename, O_CREAT | O_LARGEFILE | O_TRUNC | O_RDWR, S_IRUSR | S_IWUSR); 354 if (mFd >= 0) { 355 mInitCheck = OK; 356 } 357} 358 359MPEG4Writer::MPEG4Writer(int fd) 360 : mFd(dup(fd)), 361 mInitCheck(mFd < 0? NO_INIT: OK), 362 mUse4ByteNalLength(true), 363 mUse32BitOffset(true), 364 mIsFileSizeLimitExplicitlyRequested(false), 365 mPaused(false), 366 mStarted(false), 367 mWriterThreadStarted(false), 368 mOffset(0), 369 mMdatOffset(0), 370 mEstimatedMoovBoxSize(0), 371 mInterleaveDurationUs(1000000), 372 mLatitudex10000(0), 373 mLongitudex10000(0), 374 mAreGeoTagsAvailable(false), 375 mStartTimeOffsetMs(-1) { 376} 377 378MPEG4Writer::~MPEG4Writer() { 379 reset(); 380 381 while (!mTracks.empty()) { 382 List<Track *>::iterator it = mTracks.begin(); 383 delete *it; 384 (*it) = NULL; 385 mTracks.erase(it); 386 } 387 mTracks.clear(); 388} 389 390status_t MPEG4Writer::dump( 391 int fd, const Vector<String16>& args) { 392 const size_t SIZE = 256; 393 char buffer[SIZE]; 394 String8 result; 395 snprintf(buffer, SIZE, " MPEG4Writer %p\n", this); 396 result.append(buffer); 397 snprintf(buffer, SIZE, " mStarted: %s\n", mStarted? "true": "false"); 398 result.append(buffer); 399 ::write(fd, result.string(), result.size()); 400 for (List<Track *>::iterator it = mTracks.begin(); 401 it != mTracks.end(); ++it) { 402 (*it)->dump(fd, args); 403 } 404 return OK; 405} 406 407status_t MPEG4Writer::Track::dump( 408 int fd, const Vector<String16>& args) const { 409 const size_t SIZE = 256; 410 char buffer[SIZE]; 411 String8 result; 412 snprintf(buffer, SIZE, " %s track\n", mIsAudio? "Audio": "Video"); 413 result.append(buffer); 414 snprintf(buffer, SIZE, " reached EOS: %s\n", 415 mReachedEOS? "true": "false"); 416 result.append(buffer); 417 snprintf(buffer, SIZE, " frames encoded : %d\n", mStszTableEntries->count()); 418 result.append(buffer); 419 snprintf(buffer, SIZE, " duration encoded : %lld us\n", mTrackDurationUs); 420 result.append(buffer); 421 ::write(fd, result.string(), result.size()); 422 return OK; 423} 424 425status_t MPEG4Writer::addSource(const sp<MediaSource> &source) { 426 Mutex::Autolock l(mLock); 427 if (mStarted) { 428 ALOGE("Attempt to add source AFTER recording is started"); 429 return UNKNOWN_ERROR; 430 } 431 Track *track = new Track(this, source, 1 + mTracks.size()); 432 mTracks.push_back(track); 433 434 return OK; 435} 436 437status_t MPEG4Writer::startTracks(MetaData *params) { 438 for (List<Track *>::iterator it = mTracks.begin(); 439 it != mTracks.end(); ++it) { 440 status_t err = (*it)->start(params); 441 442 if (err != OK) { 443 for (List<Track *>::iterator it2 = mTracks.begin(); 444 it2 != it; ++it2) { 445 (*it2)->stop(); 446 } 447 448 return err; 449 } 450 } 451 return OK; 452} 453 454int64_t MPEG4Writer::estimateMoovBoxSize(int32_t bitRate) { 455 // This implementation is highly experimental/heurisitic. 456 // 457 // Statistical analysis shows that metadata usually accounts 458 // for a small portion of the total file size, usually < 0.6%. 459 460 // The default MIN_MOOV_BOX_SIZE is set to 0.6% x 1MB / 2, 461 // where 1MB is the common file size limit for MMS application. 462 // The default MAX _MOOV_BOX_SIZE value is based on about 3 463 // minute video recording with a bit rate about 3 Mbps, because 464 // statistics also show that most of the video captured are going 465 // to be less than 3 minutes. 466 467 // If the estimation is wrong, we will pay the price of wasting 468 // some reserved space. This should not happen so often statistically. 469 static const int32_t factor = mUse32BitOffset? 1: 2; 470 static const int64_t MIN_MOOV_BOX_SIZE = 3 * 1024; // 3 KB 471 static const int64_t MAX_MOOV_BOX_SIZE = (180 * 3000000 * 6LL / 8000); 472 int64_t size = MIN_MOOV_BOX_SIZE; 473 474 // Max file size limit is set 475 if (mMaxFileSizeLimitBytes != 0 && mIsFileSizeLimitExplicitlyRequested) { 476 size = mMaxFileSizeLimitBytes * 6 / 1000; 477 } 478 479 // Max file duration limit is set 480 if (mMaxFileDurationLimitUs != 0) { 481 if (bitRate > 0) { 482 int64_t size2 = 483 ((mMaxFileDurationLimitUs * bitRate * 6) / 1000 / 8000000); 484 if (mMaxFileSizeLimitBytes != 0 && mIsFileSizeLimitExplicitlyRequested) { 485 // When both file size and duration limits are set, 486 // we use the smaller limit of the two. 487 if (size > size2) { 488 size = size2; 489 } 490 } else { 491 // Only max file duration limit is set 492 size = size2; 493 } 494 } 495 } 496 497 if (size < MIN_MOOV_BOX_SIZE) { 498 size = MIN_MOOV_BOX_SIZE; 499 } 500 501 // Any long duration recording will be probably end up with 502 // non-streamable mp4 file. 503 if (size > MAX_MOOV_BOX_SIZE) { 504 size = MAX_MOOV_BOX_SIZE; 505 } 506 507 ALOGI("limits: %lld/%lld bytes/us, bit rate: %d bps and the estimated" 508 " moov size %lld bytes", 509 mMaxFileSizeLimitBytes, mMaxFileDurationLimitUs, bitRate, size); 510 return factor * size; 511} 512 513status_t MPEG4Writer::start(MetaData *param) { 514 if (mInitCheck != OK) { 515 return UNKNOWN_ERROR; 516 } 517 518 /* 519 * Check mMaxFileSizeLimitBytes at the beginning 520 * since mMaxFileSizeLimitBytes may be implicitly 521 * changed later for 32-bit file offset even if 522 * user does not ask to set it explicitly. 523 */ 524 if (mMaxFileSizeLimitBytes != 0) { 525 mIsFileSizeLimitExplicitlyRequested = true; 526 } 527 528 int32_t use64BitOffset; 529 if (param && 530 param->findInt32(kKey64BitFileOffset, &use64BitOffset) && 531 use64BitOffset) { 532 mUse32BitOffset = false; 533 } 534 535 if (mUse32BitOffset) { 536 // Implicit 32 bit file size limit 537 if (mMaxFileSizeLimitBytes == 0) { 538 mMaxFileSizeLimitBytes = kMax32BitFileSize; 539 } 540 541 // If file size is set to be larger than the 32 bit file 542 // size limit, treat it as an error. 543 if (mMaxFileSizeLimitBytes > kMax32BitFileSize) { 544 ALOGW("32-bit file size limit (%lld bytes) too big. " 545 "It is changed to %lld bytes", 546 mMaxFileSizeLimitBytes, kMax32BitFileSize); 547 mMaxFileSizeLimitBytes = kMax32BitFileSize; 548 } 549 } 550 551 int32_t use2ByteNalLength; 552 if (param && 553 param->findInt32(kKey2ByteNalLength, &use2ByteNalLength) && 554 use2ByteNalLength) { 555 mUse4ByteNalLength = false; 556 } 557 558 mStartTimestampUs = -1; 559 560 if (mStarted) { 561 if (mPaused) { 562 mPaused = false; 563 return startTracks(param); 564 } 565 return OK; 566 } 567 568 if (!param || 569 !param->findInt32(kKeyTimeScale, &mTimeScale)) { 570 mTimeScale = 1000; 571 } 572 CHECK_GT(mTimeScale, 0); 573 ALOGV("movie time scale: %d", mTimeScale); 574 575 /* 576 * When the requested file size limit is small, the priority 577 * is to meet the file size limit requirement, rather than 578 * to make the file streamable. 579 */ 580 mStreamableFile = 581 (mMaxFileSizeLimitBytes != 0 && 582 mMaxFileSizeLimitBytes >= kMinStreamableFileSizeInBytes); 583 584 mWriteMoovBoxToMemory = mStreamableFile; 585 mMoovBoxBuffer = NULL; 586 mMoovBoxBufferOffset = 0; 587 588 writeFtypBox(param); 589 590 mFreeBoxOffset = mOffset; 591 592 if (mEstimatedMoovBoxSize == 0) { 593 int32_t bitRate = -1; 594 if (param) { 595 param->findInt32(kKeyBitRate, &bitRate); 596 } 597 mEstimatedMoovBoxSize = estimateMoovBoxSize(bitRate); 598 } 599 CHECK_GE(mEstimatedMoovBoxSize, 8); 600 if (mStreamableFile) { 601 // Reserve a 'free' box only for streamable file 602 lseek64(mFd, mFreeBoxOffset, SEEK_SET); 603 writeInt32(mEstimatedMoovBoxSize); 604 write("free", 4); 605 mMdatOffset = mFreeBoxOffset + mEstimatedMoovBoxSize; 606 } else { 607 mMdatOffset = mOffset; 608 } 609 610 mOffset = mMdatOffset; 611 lseek64(mFd, mMdatOffset, SEEK_SET); 612 if (mUse32BitOffset) { 613 write("????mdat", 8); 614 } else { 615 write("\x00\x00\x00\x01mdat????????", 16); 616 } 617 618 status_t err = startWriterThread(); 619 if (err != OK) { 620 return err; 621 } 622 623 err = startTracks(param); 624 if (err != OK) { 625 return err; 626 } 627 628 mStarted = true; 629 return OK; 630} 631 632bool MPEG4Writer::use32BitFileOffset() const { 633 return mUse32BitOffset; 634} 635 636status_t MPEG4Writer::pause() { 637 if (mInitCheck != OK) { 638 return OK; 639 } 640 mPaused = true; 641 status_t err = OK; 642 for (List<Track *>::iterator it = mTracks.begin(); 643 it != mTracks.end(); ++it) { 644 status_t status = (*it)->pause(); 645 if (status != OK) { 646 err = status; 647 } 648 } 649 return err; 650} 651 652void MPEG4Writer::stopWriterThread() { 653 ALOGD("Stopping writer thread"); 654 if (!mWriterThreadStarted) { 655 return; 656 } 657 658 { 659 Mutex::Autolock autolock(mLock); 660 661 mDone = true; 662 mChunkReadyCondition.signal(); 663 } 664 665 void *dummy; 666 pthread_join(mThread, &dummy); 667 mWriterThreadStarted = false; 668 ALOGD("Writer thread stopped"); 669} 670 671/* 672 * MP4 file standard defines a composition matrix: 673 * | a b u | 674 * | c d v | 675 * | x y w | 676 * 677 * the element in the matrix is stored in the following 678 * order: {a, b, u, c, d, v, x, y, w}, 679 * where a, b, c, d, x, and y is in 16.16 format, while 680 * u, v and w is in 2.30 format. 681 */ 682void MPEG4Writer::writeCompositionMatrix(int degrees) { 683 ALOGV("writeCompositionMatrix"); 684 uint32_t a = 0x00010000; 685 uint32_t b = 0; 686 uint32_t c = 0; 687 uint32_t d = 0x00010000; 688 switch (degrees) { 689 case 0: 690 break; 691 case 90: 692 a = 0; 693 b = 0x00010000; 694 c = 0xFFFF0000; 695 d = 0; 696 break; 697 case 180: 698 a = 0xFFFF0000; 699 d = 0xFFFF0000; 700 break; 701 case 270: 702 a = 0; 703 b = 0xFFFF0000; 704 c = 0x00010000; 705 d = 0; 706 break; 707 default: 708 CHECK(!"Should never reach this unknown rotation"); 709 break; 710 } 711 712 writeInt32(a); // a 713 writeInt32(b); // b 714 writeInt32(0); // u 715 writeInt32(c); // c 716 writeInt32(d); // d 717 writeInt32(0); // v 718 writeInt32(0); // x 719 writeInt32(0); // y 720 writeInt32(0x40000000); // w 721} 722 723void MPEG4Writer::release() { 724 close(mFd); 725 mFd = -1; 726 mInitCheck = NO_INIT; 727 mStarted = false; 728} 729 730status_t MPEG4Writer::reset() { 731 if (mInitCheck != OK) { 732 return OK; 733 } else { 734 if (!mWriterThreadStarted || 735 !mStarted) { 736 if (mWriterThreadStarted) { 737 stopWriterThread(); 738 } 739 release(); 740 return OK; 741 } 742 } 743 744 status_t err = OK; 745 int64_t maxDurationUs = 0; 746 int64_t minDurationUs = 0x7fffffffffffffffLL; 747 for (List<Track *>::iterator it = mTracks.begin(); 748 it != mTracks.end(); ++it) { 749 status_t status = (*it)->stop(); 750 if (err == OK && status != OK) { 751 err = status; 752 } 753 754 int64_t durationUs = (*it)->getDurationUs(); 755 if (durationUs > maxDurationUs) { 756 maxDurationUs = durationUs; 757 } 758 if (durationUs < minDurationUs) { 759 minDurationUs = durationUs; 760 } 761 } 762 763 if (mTracks.size() > 1) { 764 ALOGD("Duration from tracks range is [%lld, %lld] us", 765 minDurationUs, maxDurationUs); 766 } 767 768 stopWriterThread(); 769 770 // Do not write out movie header on error. 771 if (err != OK) { 772 release(); 773 return err; 774 } 775 776 // Fix up the size of the 'mdat' chunk. 777 if (mUse32BitOffset) { 778 lseek64(mFd, mMdatOffset, SEEK_SET); 779 int32_t size = htonl(static_cast<int32_t>(mOffset - mMdatOffset)); 780 ::write(mFd, &size, 4); 781 } else { 782 lseek64(mFd, mMdatOffset + 8, SEEK_SET); 783 int64_t size = mOffset - mMdatOffset; 784 size = hton64(size); 785 ::write(mFd, &size, 8); 786 } 787 lseek64(mFd, mOffset, SEEK_SET); 788 789 const off64_t moovOffset = mOffset; 790 mWriteMoovBoxToMemory = mStreamableFile; 791 mMoovBoxBuffer = (uint8_t *) malloc(mEstimatedMoovBoxSize); 792 mMoovBoxBufferOffset = 0; 793 CHECK(mMoovBoxBuffer != NULL); 794 writeMoovBox(maxDurationUs); 795 796 mWriteMoovBoxToMemory = false; 797 if (mStreamableFile) { 798 CHECK_LE(mMoovBoxBufferOffset + 8, mEstimatedMoovBoxSize); 799 800 // Moov box 801 lseek64(mFd, mFreeBoxOffset, SEEK_SET); 802 mOffset = mFreeBoxOffset; 803 write(mMoovBoxBuffer, 1, mMoovBoxBufferOffset); 804 805 // Free box 806 lseek64(mFd, mOffset, SEEK_SET); 807 writeInt32(mEstimatedMoovBoxSize - mMoovBoxBufferOffset); 808 write("free", 4); 809 810 // Free temp memory 811 free(mMoovBoxBuffer); 812 mMoovBoxBuffer = NULL; 813 mMoovBoxBufferOffset = 0; 814 } else { 815 ALOGI("The mp4 file will not be streamable."); 816 } 817 818 CHECK(mBoxes.empty()); 819 820 release(); 821 return err; 822} 823 824void MPEG4Writer::writeMvhdBox(int64_t durationUs) { 825 time_t now = time(NULL); 826 beginBox("mvhd"); 827 writeInt32(0); // version=0, flags=0 828 writeInt32(now); // creation time 829 writeInt32(now); // modification time 830 writeInt32(mTimeScale); // mvhd timescale 831 int32_t duration = (durationUs * mTimeScale + 5E5) / 1E6; 832 writeInt32(duration); 833 writeInt32(0x10000); // rate: 1.0 834 writeInt16(0x100); // volume 835 writeInt16(0); // reserved 836 writeInt32(0); // reserved 837 writeInt32(0); // reserved 838 writeCompositionMatrix(0); // matrix 839 writeInt32(0); // predefined 840 writeInt32(0); // predefined 841 writeInt32(0); // predefined 842 writeInt32(0); // predefined 843 writeInt32(0); // predefined 844 writeInt32(0); // predefined 845 writeInt32(mTracks.size() + 1); // nextTrackID 846 endBox(); // mvhd 847} 848 849void MPEG4Writer::writeMoovBox(int64_t durationUs) { 850 beginBox("moov"); 851 writeMvhdBox(durationUs); 852 if (mAreGeoTagsAvailable) { 853 writeUdtaBox(); 854 } 855 int32_t id = 1; 856 for (List<Track *>::iterator it = mTracks.begin(); 857 it != mTracks.end(); ++it, ++id) { 858 (*it)->writeTrackHeader(mUse32BitOffset); 859 } 860 endBox(); // moov 861} 862 863void MPEG4Writer::writeFtypBox(MetaData *param) { 864 beginBox("ftyp"); 865 866 int32_t fileType; 867 if (param && param->findInt32(kKeyFileType, &fileType) && 868 fileType != OUTPUT_FORMAT_MPEG_4) { 869 writeFourcc("3gp4"); 870 } else { 871 writeFourcc("isom"); 872 } 873 874 writeInt32(0); 875 writeFourcc("isom"); 876 writeFourcc("3gp4"); 877 endBox(); 878} 879 880static bool isTestModeEnabled() { 881#if (PROPERTY_VALUE_MAX < 5) 882#error "PROPERTY_VALUE_MAX must be at least 5" 883#endif 884 885 // Test mode is enabled only if rw.media.record.test system 886 // property is enabled. 887 char value[PROPERTY_VALUE_MAX]; 888 if (property_get("rw.media.record.test", value, NULL) && 889 (!strcasecmp(value, "true") || !strcasecmp(value, "1"))) { 890 return true; 891 } 892 return false; 893} 894 895void MPEG4Writer::sendSessionSummary() { 896 // Send session summary only if test mode is enabled 897 if (!isTestModeEnabled()) { 898 return; 899 } 900 901 for (List<ChunkInfo>::iterator it = mChunkInfos.begin(); 902 it != mChunkInfos.end(); ++it) { 903 int trackNum = it->mTrack->getTrackId() << 28; 904 notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 905 trackNum | MEDIA_RECORDER_TRACK_INTER_CHUNK_TIME_MS, 906 it->mMaxInterChunkDurUs); 907 } 908} 909 910status_t MPEG4Writer::setInterleaveDuration(uint32_t durationUs) { 911 mInterleaveDurationUs = durationUs; 912 return OK; 913} 914 915void MPEG4Writer::lock() { 916 mLock.lock(); 917} 918 919void MPEG4Writer::unlock() { 920 mLock.unlock(); 921} 922 923off64_t MPEG4Writer::addSample_l(MediaBuffer *buffer) { 924 off64_t old_offset = mOffset; 925 926 ::write(mFd, 927 (const uint8_t *)buffer->data() + buffer->range_offset(), 928 buffer->range_length()); 929 930 mOffset += buffer->range_length(); 931 932 return old_offset; 933} 934 935static void StripStartcode(MediaBuffer *buffer) { 936 if (buffer->range_length() < 4) { 937 return; 938 } 939 940 const uint8_t *ptr = 941 (const uint8_t *)buffer->data() + buffer->range_offset(); 942 943 if (!memcmp(ptr, "\x00\x00\x00\x01", 4)) { 944 buffer->set_range( 945 buffer->range_offset() + 4, buffer->range_length() - 4); 946 } 947} 948 949off64_t MPEG4Writer::addLengthPrefixedSample_l(MediaBuffer *buffer) { 950 off64_t old_offset = mOffset; 951 952 size_t length = buffer->range_length(); 953 954 if (mUse4ByteNalLength) { 955 uint8_t x = length >> 24; 956 ::write(mFd, &x, 1); 957 x = (length >> 16) & 0xff; 958 ::write(mFd, &x, 1); 959 x = (length >> 8) & 0xff; 960 ::write(mFd, &x, 1); 961 x = length & 0xff; 962 ::write(mFd, &x, 1); 963 964 ::write(mFd, 965 (const uint8_t *)buffer->data() + buffer->range_offset(), 966 length); 967 968 mOffset += length + 4; 969 } else { 970 CHECK_LT(length, 65536); 971 972 uint8_t x = length >> 8; 973 ::write(mFd, &x, 1); 974 x = length & 0xff; 975 ::write(mFd, &x, 1); 976 ::write(mFd, (const uint8_t *)buffer->data() + buffer->range_offset(), length); 977 mOffset += length + 2; 978 } 979 980 return old_offset; 981} 982 983size_t MPEG4Writer::write( 984 const void *ptr, size_t size, size_t nmemb) { 985 986 const size_t bytes = size * nmemb; 987 if (mWriteMoovBoxToMemory) { 988 // This happens only when we write the moov box at the end of 989 // recording, not for each output video/audio frame we receive. 990 off64_t moovBoxSize = 8 + mMoovBoxBufferOffset + bytes; 991 if (moovBoxSize > mEstimatedMoovBoxSize) { 992 for (List<off64_t>::iterator it = mBoxes.begin(); 993 it != mBoxes.end(); ++it) { 994 (*it) += mOffset; 995 } 996 lseek64(mFd, mOffset, SEEK_SET); 997 ::write(mFd, mMoovBoxBuffer, mMoovBoxBufferOffset); 998 ::write(mFd, ptr, size * nmemb); 999 mOffset += (bytes + mMoovBoxBufferOffset); 1000 free(mMoovBoxBuffer); 1001 mMoovBoxBuffer = NULL; 1002 mMoovBoxBufferOffset = 0; 1003 mWriteMoovBoxToMemory = false; 1004 mStreamableFile = false; 1005 } else { 1006 memcpy(mMoovBoxBuffer + mMoovBoxBufferOffset, ptr, bytes); 1007 mMoovBoxBufferOffset += bytes; 1008 } 1009 } else { 1010 ::write(mFd, ptr, size * nmemb); 1011 mOffset += bytes; 1012 } 1013 return bytes; 1014} 1015 1016void MPEG4Writer::beginBox(const char *fourcc) { 1017 CHECK_EQ(strlen(fourcc), 4); 1018 1019 mBoxes.push_back(mWriteMoovBoxToMemory? 1020 mMoovBoxBufferOffset: mOffset); 1021 1022 writeInt32(0); 1023 writeFourcc(fourcc); 1024} 1025 1026void MPEG4Writer::endBox() { 1027 CHECK(!mBoxes.empty()); 1028 1029 off64_t offset = *--mBoxes.end(); 1030 mBoxes.erase(--mBoxes.end()); 1031 1032 if (mWriteMoovBoxToMemory) { 1033 int32_t x = htonl(mMoovBoxBufferOffset - offset); 1034 memcpy(mMoovBoxBuffer + offset, &x, 4); 1035 } else { 1036 lseek64(mFd, offset, SEEK_SET); 1037 writeInt32(mOffset - offset); 1038 mOffset -= 4; 1039 lseek64(mFd, mOffset, SEEK_SET); 1040 } 1041} 1042 1043void MPEG4Writer::writeInt8(int8_t x) { 1044 write(&x, 1, 1); 1045} 1046 1047void MPEG4Writer::writeInt16(int16_t x) { 1048 x = htons(x); 1049 write(&x, 1, 2); 1050} 1051 1052void MPEG4Writer::writeInt32(int32_t x) { 1053 x = htonl(x); 1054 write(&x, 1, 4); 1055} 1056 1057void MPEG4Writer::writeInt64(int64_t x) { 1058 x = hton64(x); 1059 write(&x, 1, 8); 1060} 1061 1062void MPEG4Writer::writeCString(const char *s) { 1063 size_t n = strlen(s); 1064 write(s, 1, n + 1); 1065} 1066 1067void MPEG4Writer::writeFourcc(const char *s) { 1068 CHECK_EQ(strlen(s), 4); 1069 write(s, 1, 4); 1070} 1071 1072 1073// Written in +/-DD.DDDD format 1074void MPEG4Writer::writeLatitude(int degreex10000) { 1075 bool isNegative = (degreex10000 < 0); 1076 char sign = isNegative? '-': '+'; 1077 1078 // Handle the whole part 1079 char str[9]; 1080 int wholePart = degreex10000 / 10000; 1081 if (wholePart == 0) { 1082 snprintf(str, 5, "%c%.2d.", sign, wholePart); 1083 } else { 1084 snprintf(str, 5, "%+.2d.", wholePart); 1085 } 1086 1087 // Handle the fractional part 1088 int fractionalPart = degreex10000 - (wholePart * 10000); 1089 if (fractionalPart < 0) { 1090 fractionalPart = -fractionalPart; 1091 } 1092 snprintf(&str[4], 5, "%.4d", fractionalPart); 1093 1094 // Do not write the null terminator 1095 write(str, 1, 8); 1096} 1097 1098// Written in +/- DDD.DDDD format 1099void MPEG4Writer::writeLongitude(int degreex10000) { 1100 bool isNegative = (degreex10000 < 0); 1101 char sign = isNegative? '-': '+'; 1102 1103 // Handle the whole part 1104 char str[10]; 1105 int wholePart = degreex10000 / 10000; 1106 if (wholePart == 0) { 1107 snprintf(str, 6, "%c%.3d.", sign, wholePart); 1108 } else { 1109 snprintf(str, 6, "%+.3d.", wholePart); 1110 } 1111 1112 // Handle the fractional part 1113 int fractionalPart = degreex10000 - (wholePart * 10000); 1114 if (fractionalPart < 0) { 1115 fractionalPart = -fractionalPart; 1116 } 1117 snprintf(&str[5], 5, "%.4d", fractionalPart); 1118 1119 // Do not write the null terminator 1120 write(str, 1, 9); 1121} 1122 1123/* 1124 * Geodata is stored according to ISO-6709 standard. 1125 * latitudex10000 is latitude in degrees times 10000, and 1126 * longitudex10000 is longitude in degrees times 10000. 1127 * The range for the latitude is in [-90, +90], and 1128 * The range for the longitude is in [-180, +180] 1129 */ 1130status_t MPEG4Writer::setGeoData(int latitudex10000, int longitudex10000) { 1131 // Is latitude or longitude out of range? 1132 if (latitudex10000 < -900000 || latitudex10000 > 900000 || 1133 longitudex10000 < -1800000 || longitudex10000 > 1800000) { 1134 return BAD_VALUE; 1135 } 1136 1137 mLatitudex10000 = latitudex10000; 1138 mLongitudex10000 = longitudex10000; 1139 mAreGeoTagsAvailable = true; 1140 return OK; 1141} 1142 1143void MPEG4Writer::write(const void *data, size_t size) { 1144 write(data, 1, size); 1145} 1146 1147bool MPEG4Writer::isFileStreamable() const { 1148 return mStreamableFile; 1149} 1150 1151bool MPEG4Writer::exceedsFileSizeLimit() { 1152 // No limit 1153 if (mMaxFileSizeLimitBytes == 0) { 1154 return false; 1155 } 1156 1157 int64_t nTotalBytesEstimate = static_cast<int64_t>(mEstimatedMoovBoxSize); 1158 for (List<Track *>::iterator it = mTracks.begin(); 1159 it != mTracks.end(); ++it) { 1160 nTotalBytesEstimate += (*it)->getEstimatedTrackSizeBytes(); 1161 } 1162 1163 if (!mStreamableFile) { 1164 // Add 1024 bytes as error tolerance 1165 return nTotalBytesEstimate + 1024 >= mMaxFileSizeLimitBytes; 1166 } 1167 // Be conservative in the estimate: do not exceed 95% of 1168 // the target file limit. For small target file size limit, though, 1169 // this will not help. 1170 return (nTotalBytesEstimate >= (95 * mMaxFileSizeLimitBytes) / 100); 1171} 1172 1173bool MPEG4Writer::exceedsFileDurationLimit() { 1174 // No limit 1175 if (mMaxFileDurationLimitUs == 0) { 1176 return false; 1177 } 1178 1179 for (List<Track *>::iterator it = mTracks.begin(); 1180 it != mTracks.end(); ++it) { 1181 if ((*it)->getDurationUs() >= mMaxFileDurationLimitUs) { 1182 return true; 1183 } 1184 } 1185 return false; 1186} 1187 1188bool MPEG4Writer::reachedEOS() { 1189 bool allDone = true; 1190 for (List<Track *>::iterator it = mTracks.begin(); 1191 it != mTracks.end(); ++it) { 1192 if (!(*it)->reachedEOS()) { 1193 allDone = false; 1194 break; 1195 } 1196 } 1197 1198 return allDone; 1199} 1200 1201void MPEG4Writer::setStartTimestampUs(int64_t timeUs) { 1202 ALOGI("setStartTimestampUs: %lld", timeUs); 1203 CHECK_GE(timeUs, 0ll); 1204 Mutex::Autolock autoLock(mLock); 1205 if (mStartTimestampUs < 0 || mStartTimestampUs > timeUs) { 1206 mStartTimestampUs = timeUs; 1207 ALOGI("Earliest track starting time: %lld", mStartTimestampUs); 1208 } 1209} 1210 1211int64_t MPEG4Writer::getStartTimestampUs() { 1212 Mutex::Autolock autoLock(mLock); 1213 return mStartTimestampUs; 1214} 1215 1216size_t MPEG4Writer::numTracks() { 1217 Mutex::Autolock autolock(mLock); 1218 return mTracks.size(); 1219} 1220 1221//////////////////////////////////////////////////////////////////////////////// 1222 1223MPEG4Writer::Track::Track( 1224 MPEG4Writer *owner, const sp<MediaSource> &source, size_t trackId) 1225 : mOwner(owner), 1226 mMeta(source->getFormat()), 1227 mSource(source), 1228 mDone(false), 1229 mPaused(false), 1230 mResumed(false), 1231 mStarted(false), 1232 mTrackId(trackId), 1233 mTrackDurationUs(0), 1234 mEstimatedTrackSizeBytes(0), 1235 mSamplesHaveSameSize(true), 1236 mStszTableEntries(new ListTableEntries<uint32_t>(1000, 1)), 1237 mStcoTableEntries(new ListTableEntries<uint32_t>(1000, 1)), 1238 mCo64TableEntries(new ListTableEntries<off64_t>(1000, 1)), 1239 mStscTableEntries(new ListTableEntries<uint32_t>(1000, 3)), 1240 mStssTableEntries(new ListTableEntries<uint32_t>(1000, 1)), 1241 mSttsTableEntries(new ListTableEntries<uint32_t>(1000, 2)), 1242 mCttsTableEntries(new ListTableEntries<uint32_t>(1000, 2)), 1243 mCodecSpecificData(NULL), 1244 mCodecSpecificDataSize(0), 1245 mGotAllCodecSpecificData(false), 1246 mReachedEOS(false), 1247 mRotation(0) { 1248 getCodecSpecificDataFromInputFormatIfPossible(); 1249 1250 const char *mime; 1251 mMeta->findCString(kKeyMIMEType, &mime); 1252 mIsAvc = !strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_AVC); 1253 mIsAudio = !strncasecmp(mime, "audio/", 6); 1254 mIsMPEG4 = !strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_MPEG4) || 1255 !strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_AAC); 1256 1257 setTimeScale(); 1258} 1259 1260void MPEG4Writer::Track::updateTrackSizeEstimate() { 1261 1262 uint32_t stcoBoxCount = (mOwner->use32BitFileOffset() 1263 ? mStcoTableEntries->count() 1264 : mCo64TableEntries->count()); 1265 int64_t stcoBoxSizeBytes = stcoBoxCount * 4; 1266 int64_t stszBoxSizeBytes = mSamplesHaveSameSize? 4: (mStszTableEntries->count() * 4); 1267 1268 mEstimatedTrackSizeBytes = mMdatSizeBytes; // media data size 1269 if (!mOwner->isFileStreamable()) { 1270 // Reserved free space is not large enough to hold 1271 // all meta data and thus wasted. 1272 mEstimatedTrackSizeBytes += mStscTableEntries->count() * 12 + // stsc box size 1273 mStssTableEntries->count() * 4 + // stss box size 1274 mSttsTableEntries->count() * 8 + // stts box size 1275 mCttsTableEntries->count() * 8 + // ctts box size 1276 stcoBoxSizeBytes + // stco box size 1277 stszBoxSizeBytes; // stsz box size 1278 } 1279} 1280 1281void MPEG4Writer::Track::addOneStscTableEntry( 1282 size_t chunkId, size_t sampleId) { 1283 1284 mStscTableEntries->add(htonl(chunkId)); 1285 mStscTableEntries->add(htonl(sampleId)); 1286 mStscTableEntries->add(htonl(1)); 1287} 1288 1289void MPEG4Writer::Track::addOneStssTableEntry(size_t sampleId) { 1290 mStssTableEntries->add(htonl(sampleId)); 1291} 1292 1293void MPEG4Writer::Track::addOneSttsTableEntry( 1294 size_t sampleCount, int32_t duration) { 1295 1296 if (duration == 0) { 1297 ALOGW("0-duration samples found: %d", sampleCount); 1298 } 1299 mSttsTableEntries->add(htonl(sampleCount)); 1300 mSttsTableEntries->add(htonl(duration)); 1301} 1302 1303void MPEG4Writer::Track::addOneCttsTableEntry( 1304 size_t sampleCount, int32_t duration) { 1305 1306 if (mIsAudio) { 1307 return; 1308 } 1309 mCttsTableEntries->add(htonl(sampleCount)); 1310 mCttsTableEntries->add(htonl(duration)); 1311} 1312 1313void MPEG4Writer::Track::addChunkOffset(off64_t offset) { 1314 if (mOwner->use32BitFileOffset()) { 1315 uint32_t value = offset; 1316 mStcoTableEntries->add(htonl(value)); 1317 } else { 1318 mCo64TableEntries->add(hton64(offset)); 1319 } 1320} 1321 1322void MPEG4Writer::Track::setTimeScale() { 1323 ALOGV("setTimeScale"); 1324 // Default time scale 1325 mTimeScale = 90000; 1326 1327 if (mIsAudio) { 1328 // Use the sampling rate as the default time scale for audio track. 1329 int32_t sampleRate; 1330 bool success = mMeta->findInt32(kKeySampleRate, &sampleRate); 1331 CHECK(success); 1332 mTimeScale = sampleRate; 1333 } 1334 1335 // If someone would like to overwrite the timescale, use user-supplied value. 1336 int32_t timeScale; 1337 if (mMeta->findInt32(kKeyTimeScale, &timeScale)) { 1338 mTimeScale = timeScale; 1339 } 1340 1341 CHECK_GT(mTimeScale, 0); 1342} 1343 1344void MPEG4Writer::Track::getCodecSpecificDataFromInputFormatIfPossible() { 1345 const char *mime; 1346 CHECK(mMeta->findCString(kKeyMIMEType, &mime)); 1347 1348 if (!strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_AVC)) { 1349 uint32_t type; 1350 const void *data; 1351 size_t size; 1352 if (mMeta->findData(kKeyAVCC, &type, &data, &size)) { 1353 mCodecSpecificData = malloc(size); 1354 mCodecSpecificDataSize = size; 1355 memcpy(mCodecSpecificData, data, size); 1356 mGotAllCodecSpecificData = true; 1357 } 1358 } else if (!strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_MPEG4) 1359 || !strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_AAC)) { 1360 uint32_t type; 1361 const void *data; 1362 size_t size; 1363 if (mMeta->findData(kKeyESDS, &type, &data, &size)) { 1364 ESDS esds(data, size); 1365 if (esds.getCodecSpecificInfo(&data, &size) == OK) { 1366 mCodecSpecificData = malloc(size); 1367 mCodecSpecificDataSize = size; 1368 memcpy(mCodecSpecificData, data, size); 1369 mGotAllCodecSpecificData = true; 1370 } 1371 } 1372 } 1373} 1374 1375MPEG4Writer::Track::~Track() { 1376 stop(); 1377 1378 delete mStszTableEntries; 1379 delete mStcoTableEntries; 1380 delete mCo64TableEntries; 1381 delete mStscTableEntries; 1382 delete mSttsTableEntries; 1383 delete mStssTableEntries; 1384 delete mCttsTableEntries; 1385 1386 mStszTableEntries = NULL; 1387 mStcoTableEntries = NULL; 1388 mCo64TableEntries = NULL; 1389 mStscTableEntries = NULL; 1390 mSttsTableEntries = NULL; 1391 mStssTableEntries = NULL; 1392 mCttsTableEntries = NULL; 1393 1394 if (mCodecSpecificData != NULL) { 1395 free(mCodecSpecificData); 1396 mCodecSpecificData = NULL; 1397 } 1398} 1399 1400void MPEG4Writer::Track::initTrackingProgressStatus(MetaData *params) { 1401 ALOGV("initTrackingProgressStatus"); 1402 mPreviousTrackTimeUs = -1; 1403 mTrackingProgressStatus = false; 1404 mTrackEveryTimeDurationUs = 0; 1405 { 1406 int64_t timeUs; 1407 if (params && params->findInt64(kKeyTrackTimeStatus, &timeUs)) { 1408 ALOGV("Receive request to track progress status for every %lld us", timeUs); 1409 mTrackEveryTimeDurationUs = timeUs; 1410 mTrackingProgressStatus = true; 1411 } 1412 } 1413} 1414 1415// static 1416void *MPEG4Writer::ThreadWrapper(void *me) { 1417 ALOGV("ThreadWrapper: %p", me); 1418 MPEG4Writer *writer = static_cast<MPEG4Writer *>(me); 1419 writer->threadFunc(); 1420 return NULL; 1421} 1422 1423void MPEG4Writer::bufferChunk(const Chunk& chunk) { 1424 ALOGV("bufferChunk: %p", chunk.mTrack); 1425 Mutex::Autolock autolock(mLock); 1426 CHECK_EQ(mDone, false); 1427 1428 for (List<ChunkInfo>::iterator it = mChunkInfos.begin(); 1429 it != mChunkInfos.end(); ++it) { 1430 1431 if (chunk.mTrack == it->mTrack) { // Found owner 1432 it->mChunks.push_back(chunk); 1433 mChunkReadyCondition.signal(); 1434 return; 1435 } 1436 } 1437 1438 CHECK(!"Received a chunk for a unknown track"); 1439} 1440 1441void MPEG4Writer::writeChunkToFile(Chunk* chunk) { 1442 ALOGV("writeChunkToFile: %lld from %s track", 1443 chunk->mTimeStampUs, chunk->mTrack->isAudio()? "audio": "video"); 1444 1445 int32_t isFirstSample = true; 1446 while (!chunk->mSamples.empty()) { 1447 List<MediaBuffer *>::iterator it = chunk->mSamples.begin(); 1448 1449 off64_t offset = chunk->mTrack->isAvc() 1450 ? addLengthPrefixedSample_l(*it) 1451 : addSample_l(*it); 1452 1453 if (isFirstSample) { 1454 chunk->mTrack->addChunkOffset(offset); 1455 isFirstSample = false; 1456 } 1457 1458 (*it)->release(); 1459 (*it) = NULL; 1460 chunk->mSamples.erase(it); 1461 } 1462 chunk->mSamples.clear(); 1463} 1464 1465void MPEG4Writer::writeAllChunks() { 1466 ALOGV("writeAllChunks"); 1467 size_t outstandingChunks = 0; 1468 Chunk chunk; 1469 while (findChunkToWrite(&chunk)) { 1470 writeChunkToFile(&chunk); 1471 ++outstandingChunks; 1472 } 1473 1474 sendSessionSummary(); 1475 1476 mChunkInfos.clear(); 1477 ALOGD("%d chunks are written in the last batch", outstandingChunks); 1478} 1479 1480bool MPEG4Writer::findChunkToWrite(Chunk *chunk) { 1481 ALOGV("findChunkToWrite"); 1482 1483 int64_t minTimestampUs = 0x7FFFFFFFFFFFFFFFLL; 1484 Track *track = NULL; 1485 for (List<ChunkInfo>::iterator it = mChunkInfos.begin(); 1486 it != mChunkInfos.end(); ++it) { 1487 if (!it->mChunks.empty()) { 1488 List<Chunk>::iterator chunkIt = it->mChunks.begin(); 1489 if (chunkIt->mTimeStampUs < minTimestampUs) { 1490 minTimestampUs = chunkIt->mTimeStampUs; 1491 track = it->mTrack; 1492 } 1493 } 1494 } 1495 1496 if (track == NULL) { 1497 ALOGV("Nothing to be written after all"); 1498 return false; 1499 } 1500 1501 if (mIsFirstChunk) { 1502 mIsFirstChunk = false; 1503 } 1504 1505 for (List<ChunkInfo>::iterator it = mChunkInfos.begin(); 1506 it != mChunkInfos.end(); ++it) { 1507 if (it->mTrack == track) { 1508 *chunk = *(it->mChunks.begin()); 1509 it->mChunks.erase(it->mChunks.begin()); 1510 CHECK_EQ(chunk->mTrack, track); 1511 1512 int64_t interChunkTimeUs = 1513 chunk->mTimeStampUs - it->mPrevChunkTimestampUs; 1514 if (interChunkTimeUs > it->mPrevChunkTimestampUs) { 1515 it->mMaxInterChunkDurUs = interChunkTimeUs; 1516 } 1517 1518 return true; 1519 } 1520 } 1521 1522 return false; 1523} 1524 1525void MPEG4Writer::threadFunc() { 1526 ALOGV("threadFunc"); 1527 1528 prctl(PR_SET_NAME, (unsigned long)"MPEG4Writer", 0, 0, 0); 1529 1530 Mutex::Autolock autoLock(mLock); 1531 while (!mDone) { 1532 Chunk chunk; 1533 bool chunkFound = false; 1534 1535 while (!mDone && !(chunkFound = findChunkToWrite(&chunk))) { 1536 mChunkReadyCondition.wait(mLock); 1537 } 1538 1539 // Actual write without holding the lock in order to 1540 // reduce the blocking time for media track threads. 1541 if (chunkFound) { 1542 mLock.unlock(); 1543 writeChunkToFile(&chunk); 1544 mLock.lock(); 1545 } 1546 } 1547 1548 writeAllChunks(); 1549} 1550 1551status_t MPEG4Writer::startWriterThread() { 1552 ALOGV("startWriterThread"); 1553 1554 mDone = false; 1555 mIsFirstChunk = true; 1556 mDriftTimeUs = 0; 1557 for (List<Track *>::iterator it = mTracks.begin(); 1558 it != mTracks.end(); ++it) { 1559 ChunkInfo info; 1560 info.mTrack = *it; 1561 info.mPrevChunkTimestampUs = 0; 1562 info.mMaxInterChunkDurUs = 0; 1563 mChunkInfos.push_back(info); 1564 } 1565 1566 pthread_attr_t attr; 1567 pthread_attr_init(&attr); 1568 pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE); 1569 pthread_create(&mThread, &attr, ThreadWrapper, this); 1570 pthread_attr_destroy(&attr); 1571 mWriterThreadStarted = true; 1572 return OK; 1573} 1574 1575 1576status_t MPEG4Writer::Track::start(MetaData *params) { 1577 if (!mDone && mPaused) { 1578 mPaused = false; 1579 mResumed = true; 1580 return OK; 1581 } 1582 1583 int64_t startTimeUs; 1584 if (params == NULL || !params->findInt64(kKeyTime, &startTimeUs)) { 1585 startTimeUs = 0; 1586 } 1587 mStartTimeRealUs = startTimeUs; 1588 1589 int32_t rotationDegrees; 1590 if (!mIsAudio && params && params->findInt32(kKeyRotation, &rotationDegrees)) { 1591 mRotation = rotationDegrees; 1592 } 1593 1594 mIsRealTimeRecording = true; 1595 { 1596 int32_t isNotRealTime; 1597 if (params && params->findInt32(kKeyNotRealTime, &isNotRealTime)) { 1598 mIsRealTimeRecording = (isNotRealTime == 0); 1599 } 1600 } 1601 1602 initTrackingProgressStatus(params); 1603 1604 sp<MetaData> meta = new MetaData; 1605 if (mIsRealTimeRecording && mOwner->numTracks() > 1) { 1606 /* 1607 * This extra delay of accepting incoming audio/video signals 1608 * helps to align a/v start time at the beginning of a recording 1609 * session, and it also helps eliminate the "recording" sound for 1610 * camcorder applications. 1611 * 1612 * If client does not set the start time offset, we fall back to 1613 * use the default initial delay value. 1614 */ 1615 int64_t startTimeOffsetUs = mOwner->getStartTimeOffsetMs() * 1000LL; 1616 if (startTimeOffsetUs < 0) { // Start time offset was not set 1617 startTimeOffsetUs = kInitialDelayTimeUs; 1618 } 1619 startTimeUs += startTimeOffsetUs; 1620 ALOGI("Start time offset: %lld us", startTimeOffsetUs); 1621 } 1622 1623 meta->setInt64(kKeyTime, startTimeUs); 1624 1625 status_t err = mSource->start(meta.get()); 1626 if (err != OK) { 1627 mDone = mReachedEOS = true; 1628 return err; 1629 } 1630 1631 pthread_attr_t attr; 1632 pthread_attr_init(&attr); 1633 pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE); 1634 1635 mDone = false; 1636 mStarted = true; 1637 mTrackDurationUs = 0; 1638 mReachedEOS = false; 1639 mEstimatedTrackSizeBytes = 0; 1640 mMdatSizeBytes = 0; 1641 mMaxChunkDurationUs = 0; 1642 1643 pthread_create(&mThread, &attr, ThreadWrapper, this); 1644 pthread_attr_destroy(&attr); 1645 1646 return OK; 1647} 1648 1649status_t MPEG4Writer::Track::pause() { 1650 mPaused = true; 1651 return OK; 1652} 1653 1654status_t MPEG4Writer::Track::stop() { 1655 ALOGD("Stopping %s track", mIsAudio? "Audio": "Video"); 1656 if (!mStarted) { 1657 ALOGE("Stop() called but track is not started"); 1658 return ERROR_END_OF_STREAM; 1659 } 1660 1661 if (mDone) { 1662 return OK; 1663 } 1664 mDone = true; 1665 1666 void *dummy; 1667 pthread_join(mThread, &dummy); 1668 1669 status_t err = (status_t) dummy; 1670 1671 ALOGD("Stopping %s track source", mIsAudio? "Audio": "Video"); 1672 { 1673 status_t status = mSource->stop(); 1674 if (err == OK && status != OK && status != ERROR_END_OF_STREAM) { 1675 err = status; 1676 } 1677 } 1678 1679 ALOGD("%s track stopped", mIsAudio? "Audio": "Video"); 1680 return err; 1681} 1682 1683bool MPEG4Writer::Track::reachedEOS() { 1684 return mReachedEOS; 1685} 1686 1687// static 1688void *MPEG4Writer::Track::ThreadWrapper(void *me) { 1689 Track *track = static_cast<Track *>(me); 1690 1691 status_t err = track->threadEntry(); 1692 return (void *) err; 1693} 1694 1695static void getNalUnitType(uint8_t byte, uint8_t* type) { 1696 ALOGV("getNalUnitType: %d", byte); 1697 1698 // nal_unit_type: 5-bit unsigned integer 1699 *type = (byte & 0x1F); 1700} 1701 1702static const uint8_t *findNextStartCode( 1703 const uint8_t *data, size_t length) { 1704 1705 ALOGV("findNextStartCode: %p %d", data, length); 1706 1707 size_t bytesLeft = length; 1708 while (bytesLeft > 4 && 1709 memcmp("\x00\x00\x00\x01", &data[length - bytesLeft], 4)) { 1710 --bytesLeft; 1711 } 1712 if (bytesLeft <= 4) { 1713 bytesLeft = 0; // Last parameter set 1714 } 1715 return &data[length - bytesLeft]; 1716} 1717 1718const uint8_t *MPEG4Writer::Track::parseParamSet( 1719 const uint8_t *data, size_t length, int type, size_t *paramSetLen) { 1720 1721 ALOGV("parseParamSet"); 1722 CHECK(type == kNalUnitTypeSeqParamSet || 1723 type == kNalUnitTypePicParamSet); 1724 1725 const uint8_t *nextStartCode = findNextStartCode(data, length); 1726 *paramSetLen = nextStartCode - data; 1727 if (*paramSetLen == 0) { 1728 ALOGE("Param set is malformed, since its length is 0"); 1729 return NULL; 1730 } 1731 1732 AVCParamSet paramSet(*paramSetLen, data); 1733 if (type == kNalUnitTypeSeqParamSet) { 1734 if (*paramSetLen < 4) { 1735 ALOGE("Seq parameter set malformed"); 1736 return NULL; 1737 } 1738 if (mSeqParamSets.empty()) { 1739 mProfileIdc = data[1]; 1740 mProfileCompatible = data[2]; 1741 mLevelIdc = data[3]; 1742 } else { 1743 if (mProfileIdc != data[1] || 1744 mProfileCompatible != data[2] || 1745 mLevelIdc != data[3]) { 1746 ALOGE("Inconsistent profile/level found in seq parameter sets"); 1747 return NULL; 1748 } 1749 } 1750 mSeqParamSets.push_back(paramSet); 1751 } else { 1752 mPicParamSets.push_back(paramSet); 1753 } 1754 return nextStartCode; 1755} 1756 1757status_t MPEG4Writer::Track::copyAVCCodecSpecificData( 1758 const uint8_t *data, size_t size) { 1759 ALOGV("copyAVCCodecSpecificData"); 1760 1761 // 2 bytes for each of the parameter set length field 1762 // plus the 7 bytes for the header 1763 if (size < 4 + 7) { 1764 ALOGE("Codec specific data length too short: %d", size); 1765 return ERROR_MALFORMED; 1766 } 1767 1768 mCodecSpecificDataSize = size; 1769 mCodecSpecificData = malloc(size); 1770 memcpy(mCodecSpecificData, data, size); 1771 return OK; 1772} 1773 1774status_t MPEG4Writer::Track::parseAVCCodecSpecificData( 1775 const uint8_t *data, size_t size) { 1776 1777 ALOGV("parseAVCCodecSpecificData"); 1778 // Data starts with a start code. 1779 // SPS and PPS are separated with start codes. 1780 // Also, SPS must come before PPS 1781 uint8_t type = kNalUnitTypeSeqParamSet; 1782 bool gotSps = false; 1783 bool gotPps = false; 1784 const uint8_t *tmp = data; 1785 const uint8_t *nextStartCode = data; 1786 size_t bytesLeft = size; 1787 size_t paramSetLen = 0; 1788 mCodecSpecificDataSize = 0; 1789 while (bytesLeft > 4 && !memcmp("\x00\x00\x00\x01", tmp, 4)) { 1790 getNalUnitType(*(tmp + 4), &type); 1791 if (type == kNalUnitTypeSeqParamSet) { 1792 if (gotPps) { 1793 ALOGE("SPS must come before PPS"); 1794 return ERROR_MALFORMED; 1795 } 1796 if (!gotSps) { 1797 gotSps = true; 1798 } 1799 nextStartCode = parseParamSet(tmp + 4, bytesLeft - 4, type, ¶mSetLen); 1800 } else if (type == kNalUnitTypePicParamSet) { 1801 if (!gotSps) { 1802 ALOGE("SPS must come before PPS"); 1803 return ERROR_MALFORMED; 1804 } 1805 if (!gotPps) { 1806 gotPps = true; 1807 } 1808 nextStartCode = parseParamSet(tmp + 4, bytesLeft - 4, type, ¶mSetLen); 1809 } else { 1810 ALOGE("Only SPS and PPS Nal units are expected"); 1811 return ERROR_MALFORMED; 1812 } 1813 1814 if (nextStartCode == NULL) { 1815 return ERROR_MALFORMED; 1816 } 1817 1818 // Move on to find the next parameter set 1819 bytesLeft -= nextStartCode - tmp; 1820 tmp = nextStartCode; 1821 mCodecSpecificDataSize += (2 + paramSetLen); 1822 } 1823 1824 { 1825 // Check on the number of seq parameter sets 1826 size_t nSeqParamSets = mSeqParamSets.size(); 1827 if (nSeqParamSets == 0) { 1828 ALOGE("Cound not find sequence parameter set"); 1829 return ERROR_MALFORMED; 1830 } 1831 1832 if (nSeqParamSets > 0x1F) { 1833 ALOGE("Too many seq parameter sets (%d) found", nSeqParamSets); 1834 return ERROR_MALFORMED; 1835 } 1836 } 1837 1838 { 1839 // Check on the number of pic parameter sets 1840 size_t nPicParamSets = mPicParamSets.size(); 1841 if (nPicParamSets == 0) { 1842 ALOGE("Cound not find picture parameter set"); 1843 return ERROR_MALFORMED; 1844 } 1845 if (nPicParamSets > 0xFF) { 1846 ALOGE("Too many pic parameter sets (%d) found", nPicParamSets); 1847 return ERROR_MALFORMED; 1848 } 1849 } 1850// FIXME: 1851// Add chromat_format_idc, bit depth values, etc for AVC/h264 high profile and above 1852// and remove #if 0 1853#if 0 1854 { 1855 // Check on the profiles 1856 // These profiles requires additional parameter set extensions 1857 if (mProfileIdc == 100 || mProfileIdc == 110 || 1858 mProfileIdc == 122 || mProfileIdc == 144) { 1859 ALOGE("Sorry, no support for profile_idc: %d!", mProfileIdc); 1860 return BAD_VALUE; 1861 } 1862 } 1863#endif 1864 return OK; 1865} 1866 1867status_t MPEG4Writer::Track::makeAVCCodecSpecificData( 1868 const uint8_t *data, size_t size) { 1869 1870 if (mCodecSpecificData != NULL) { 1871 ALOGE("Already have codec specific data"); 1872 return ERROR_MALFORMED; 1873 } 1874 1875 if (size < 4) { 1876 ALOGE("Codec specific data length too short: %d", size); 1877 return ERROR_MALFORMED; 1878 } 1879 1880 // Data is in the form of AVCCodecSpecificData 1881 if (memcmp("\x00\x00\x00\x01", data, 4)) { 1882 return copyAVCCodecSpecificData(data, size); 1883 } 1884 1885 if (parseAVCCodecSpecificData(data, size) != OK) { 1886 return ERROR_MALFORMED; 1887 } 1888 1889 // ISO 14496-15: AVC file format 1890 mCodecSpecificDataSize += 7; // 7 more bytes in the header 1891 mCodecSpecificData = malloc(mCodecSpecificDataSize); 1892 uint8_t *header = (uint8_t *)mCodecSpecificData; 1893 header[0] = 1; // version 1894 header[1] = mProfileIdc; // profile indication 1895 header[2] = mProfileCompatible; // profile compatibility 1896 header[3] = mLevelIdc; 1897 1898 // 6-bit '111111' followed by 2-bit to lengthSizeMinuusOne 1899 if (mOwner->useNalLengthFour()) { 1900 header[4] = 0xfc | 3; // length size == 4 bytes 1901 } else { 1902 header[4] = 0xfc | 1; // length size == 2 bytes 1903 } 1904 1905 // 3-bit '111' followed by 5-bit numSequenceParameterSets 1906 int nSequenceParamSets = mSeqParamSets.size(); 1907 header[5] = 0xe0 | nSequenceParamSets; 1908 header += 6; 1909 for (List<AVCParamSet>::iterator it = mSeqParamSets.begin(); 1910 it != mSeqParamSets.end(); ++it) { 1911 // 16-bit sequence parameter set length 1912 uint16_t seqParamSetLength = it->mLength; 1913 header[0] = seqParamSetLength >> 8; 1914 header[1] = seqParamSetLength & 0xff; 1915 1916 // SPS NAL unit (sequence parameter length bytes) 1917 memcpy(&header[2], it->mData, seqParamSetLength); 1918 header += (2 + seqParamSetLength); 1919 } 1920 1921 // 8-bit nPictureParameterSets 1922 int nPictureParamSets = mPicParamSets.size(); 1923 header[0] = nPictureParamSets; 1924 header += 1; 1925 for (List<AVCParamSet>::iterator it = mPicParamSets.begin(); 1926 it != mPicParamSets.end(); ++it) { 1927 // 16-bit picture parameter set length 1928 uint16_t picParamSetLength = it->mLength; 1929 header[0] = picParamSetLength >> 8; 1930 header[1] = picParamSetLength & 0xff; 1931 1932 // PPS Nal unit (picture parameter set length bytes) 1933 memcpy(&header[2], it->mData, picParamSetLength); 1934 header += (2 + picParamSetLength); 1935 } 1936 1937 return OK; 1938} 1939 1940/* 1941 * Updates the drift time from the audio track so that 1942 * the video track can get the updated drift time information 1943 * from the file writer. The fluctuation of the drift time of the audio 1944 * encoding path is smoothed out with a simple filter by giving a larger 1945 * weight to more recently drift time. The filter coefficients, 0.5 and 0.5, 1946 * are heuristically determined. 1947 */ 1948void MPEG4Writer::Track::updateDriftTime(const sp<MetaData>& meta) { 1949 int64_t driftTimeUs = 0; 1950 if (meta->findInt64(kKeyDriftTime, &driftTimeUs)) { 1951 int64_t prevDriftTimeUs = mOwner->getDriftTimeUs(); 1952 int64_t timeUs = (driftTimeUs + prevDriftTimeUs) >> 1; 1953 mOwner->setDriftTimeUs(timeUs); 1954 } 1955} 1956 1957status_t MPEG4Writer::Track::threadEntry() { 1958 int32_t count = 0; 1959 const int64_t interleaveDurationUs = mOwner->interleaveDuration(); 1960 const bool hasMultipleTracks = (mOwner->numTracks() > 1); 1961 int64_t chunkTimestampUs = 0; 1962 int32_t nChunks = 0; 1963 int32_t nZeroLengthFrames = 0; 1964 int64_t lastTimestampUs = 0; // Previous sample time stamp 1965 int64_t lastDurationUs = 0; // Between the previous two samples 1966 int64_t currDurationTicks = 0; // Timescale based ticks 1967 int64_t lastDurationTicks = 0; // Timescale based ticks 1968 int32_t sampleCount = 1; // Sample count in the current stts table entry 1969 uint32_t previousSampleSize = 0; // Size of the previous sample 1970 int64_t previousPausedDurationUs = 0; 1971 int64_t timestampUs = 0; 1972 int64_t cttsOffsetTimeUs = 0; 1973 int64_t currCttsOffsetTimeTicks = 0; // Timescale based ticks 1974 int64_t lastCttsOffsetTimeTicks = -1; // Timescale based ticks 1975 int32_t cttsSampleCount = 0; // Sample count in the current ctts table entry 1976 uint32_t lastSamplesPerChunk = 0; 1977 1978 if (mIsAudio) { 1979 prctl(PR_SET_NAME, (unsigned long)"AudioTrackEncoding", 0, 0, 0); 1980 } else { 1981 prctl(PR_SET_NAME, (unsigned long)"VideoTrackEncoding", 0, 0, 0); 1982 } 1983 androidSetThreadPriority(0, ANDROID_PRIORITY_AUDIO); 1984 1985 sp<MetaData> meta_data; 1986 1987 status_t err = OK; 1988 MediaBuffer *buffer; 1989 while (!mDone && (err = mSource->read(&buffer)) == OK) { 1990 if (buffer->range_length() == 0) { 1991 buffer->release(); 1992 buffer = NULL; 1993 ++nZeroLengthFrames; 1994 continue; 1995 } 1996 1997 // If the codec specific data has not been received yet, delay pause. 1998 // After the codec specific data is received, discard what we received 1999 // when the track is to be paused. 2000 if (mPaused && !mResumed) { 2001 buffer->release(); 2002 buffer = NULL; 2003 continue; 2004 } 2005 2006 ++count; 2007 2008 int32_t isCodecConfig; 2009 if (buffer->meta_data()->findInt32(kKeyIsCodecConfig, &isCodecConfig) 2010 && isCodecConfig) { 2011 CHECK(!mGotAllCodecSpecificData); 2012 2013 if (mIsAvc) { 2014 status_t err = makeAVCCodecSpecificData( 2015 (const uint8_t *)buffer->data() 2016 + buffer->range_offset(), 2017 buffer->range_length()); 2018 CHECK_EQ((status_t)OK, err); 2019 } else if (mIsMPEG4) { 2020 mCodecSpecificDataSize = buffer->range_length(); 2021 mCodecSpecificData = malloc(mCodecSpecificDataSize); 2022 memcpy(mCodecSpecificData, 2023 (const uint8_t *)buffer->data() 2024 + buffer->range_offset(), 2025 buffer->range_length()); 2026 } 2027 2028 buffer->release(); 2029 buffer = NULL; 2030 2031 mGotAllCodecSpecificData = true; 2032 continue; 2033 } 2034 2035 // Make a deep copy of the MediaBuffer and Metadata and release 2036 // the original as soon as we can 2037 MediaBuffer *copy = new MediaBuffer(buffer->range_length()); 2038 memcpy(copy->data(), (uint8_t *)buffer->data() + buffer->range_offset(), 2039 buffer->range_length()); 2040 copy->set_range(0, buffer->range_length()); 2041 meta_data = new MetaData(*buffer->meta_data().get()); 2042 buffer->release(); 2043 buffer = NULL; 2044 2045 if (mIsAvc) StripStartcode(copy); 2046 2047 size_t sampleSize = copy->range_length(); 2048 if (mIsAvc) { 2049 if (mOwner->useNalLengthFour()) { 2050 sampleSize += 4; 2051 } else { 2052 sampleSize += 2; 2053 } 2054 } 2055 2056 // Max file size or duration handling 2057 mMdatSizeBytes += sampleSize; 2058 updateTrackSizeEstimate(); 2059 2060 if (mOwner->exceedsFileSizeLimit()) { 2061 mOwner->notify(MEDIA_RECORDER_EVENT_INFO, MEDIA_RECORDER_INFO_MAX_FILESIZE_REACHED, 0); 2062 break; 2063 } 2064 if (mOwner->exceedsFileDurationLimit()) { 2065 mOwner->notify(MEDIA_RECORDER_EVENT_INFO, MEDIA_RECORDER_INFO_MAX_DURATION_REACHED, 0); 2066 break; 2067 } 2068 2069 2070 int32_t isSync = false; 2071 meta_data->findInt32(kKeyIsSyncFrame, &isSync); 2072 CHECK(meta_data->findInt64(kKeyTime, ×tampUs)); 2073 2074//////////////////////////////////////////////////////////////////////////////// 2075 if (mStszTableEntries->count() == 0) { 2076 mFirstSampleTimeRealUs = systemTime() / 1000; 2077 mStartTimestampUs = timestampUs; 2078 mOwner->setStartTimestampUs(mStartTimestampUs); 2079 previousPausedDurationUs = mStartTimestampUs; 2080 } 2081 2082 if (mResumed) { 2083 int64_t durExcludingEarlierPausesUs = timestampUs - previousPausedDurationUs; 2084 CHECK_GE(durExcludingEarlierPausesUs, 0ll); 2085 int64_t pausedDurationUs = durExcludingEarlierPausesUs - mTrackDurationUs; 2086 CHECK_GE(pausedDurationUs, lastDurationUs); 2087 previousPausedDurationUs += pausedDurationUs - lastDurationUs; 2088 mResumed = false; 2089 } 2090 2091 timestampUs -= previousPausedDurationUs; 2092 CHECK_GE(timestampUs, 0ll); 2093 if (!mIsAudio) { 2094 /* 2095 * Composition time: timestampUs 2096 * Decoding time: decodingTimeUs 2097 * Composition time offset = composition time - decoding time 2098 */ 2099 int64_t decodingTimeUs; 2100 CHECK(meta_data->findInt64(kKeyDecodingTime, &decodingTimeUs)); 2101 decodingTimeUs -= previousPausedDurationUs; 2102 cttsOffsetTimeUs = 2103 timestampUs + kMaxCttsOffsetTimeUs - decodingTimeUs; 2104 CHECK_GE(cttsOffsetTimeUs, 0ll); 2105 timestampUs = decodingTimeUs; 2106 ALOGV("decoding time: %lld and ctts offset time: %lld", 2107 timestampUs, cttsOffsetTimeUs); 2108 2109 // Update ctts box table if necessary 2110 currCttsOffsetTimeTicks = 2111 (cttsOffsetTimeUs * mTimeScale + 500000LL) / 1000000LL; 2112 CHECK_LE(currCttsOffsetTimeTicks, 0x0FFFFFFFFLL); 2113 if (mStszTableEntries->count() == 0) { 2114 // Force the first ctts table entry to have one single entry 2115 // so that we can do adjustment for the initial track start 2116 // time offset easily in writeCttsBox(). 2117 lastCttsOffsetTimeTicks = currCttsOffsetTimeTicks; 2118 addOneCttsTableEntry(1, currCttsOffsetTimeTicks); 2119 cttsSampleCount = 0; // No sample in ctts box is pending 2120 } else { 2121 if (currCttsOffsetTimeTicks != lastCttsOffsetTimeTicks) { 2122 addOneCttsTableEntry(cttsSampleCount, lastCttsOffsetTimeTicks); 2123 lastCttsOffsetTimeTicks = currCttsOffsetTimeTicks; 2124 cttsSampleCount = 1; // One sample in ctts box is pending 2125 } else { 2126 ++cttsSampleCount; 2127 } 2128 } 2129 2130 // Update ctts time offset range 2131 if (mStszTableEntries->count() == 0) { 2132 mMinCttsOffsetTimeUs = currCttsOffsetTimeTicks; 2133 mMaxCttsOffsetTimeUs = currCttsOffsetTimeTicks; 2134 } else { 2135 if (currCttsOffsetTimeTicks > mMaxCttsOffsetTimeUs) { 2136 mMaxCttsOffsetTimeUs = currCttsOffsetTimeTicks; 2137 } else if (currCttsOffsetTimeTicks < mMinCttsOffsetTimeUs) { 2138 mMinCttsOffsetTimeUs = currCttsOffsetTimeTicks; 2139 } 2140 } 2141 2142 } 2143 2144 if (mIsRealTimeRecording) { 2145 if (mIsAudio) { 2146 updateDriftTime(meta_data); 2147 } 2148 } 2149 2150 CHECK_GE(timestampUs, 0ll); 2151 ALOGV("%s media time stamp: %lld and previous paused duration %lld", 2152 mIsAudio? "Audio": "Video", timestampUs, previousPausedDurationUs); 2153 if (timestampUs > mTrackDurationUs) { 2154 mTrackDurationUs = timestampUs; 2155 } 2156 2157 // We need to use the time scale based ticks, rather than the 2158 // timestamp itself to determine whether we have to use a new 2159 // stts entry, since we may have rounding errors. 2160 // The calculation is intended to reduce the accumulated 2161 // rounding errors. 2162 currDurationTicks = 2163 ((timestampUs * mTimeScale + 500000LL) / 1000000LL - 2164 (lastTimestampUs * mTimeScale + 500000LL) / 1000000LL); 2165 if (currDurationTicks < 0ll) { 2166 ALOGE("timestampUs %lld < lastTimestampUs %lld for %s track", 2167 timestampUs, lastTimestampUs, mIsAudio? "Audio": "Video"); 2168 return UNKNOWN_ERROR; 2169 } 2170 2171 mStszTableEntries->add(htonl(sampleSize)); 2172 if (mStszTableEntries->count() > 2) { 2173 2174 // Force the first sample to have its own stts entry so that 2175 // we can adjust its value later to maintain the A/V sync. 2176 if (mStszTableEntries->count() == 3 || currDurationTicks != lastDurationTicks) { 2177 addOneSttsTableEntry(sampleCount, lastDurationTicks); 2178 sampleCount = 1; 2179 } else { 2180 ++sampleCount; 2181 } 2182 2183 } 2184 if (mSamplesHaveSameSize) { 2185 if (mStszTableEntries->count() >= 2 && previousSampleSize != sampleSize) { 2186 mSamplesHaveSameSize = false; 2187 } 2188 previousSampleSize = sampleSize; 2189 } 2190 ALOGV("%s timestampUs/lastTimestampUs: %lld/%lld", 2191 mIsAudio? "Audio": "Video", timestampUs, lastTimestampUs); 2192 lastDurationUs = timestampUs - lastTimestampUs; 2193 lastDurationTicks = currDurationTicks; 2194 lastTimestampUs = timestampUs; 2195 2196 if (isSync != 0) { 2197 addOneStssTableEntry(mStszTableEntries->count()); 2198 } 2199 2200 if (mTrackingProgressStatus) { 2201 if (mPreviousTrackTimeUs <= 0) { 2202 mPreviousTrackTimeUs = mStartTimestampUs; 2203 } 2204 trackProgressStatus(timestampUs); 2205 } 2206 if (!hasMultipleTracks) { 2207 off64_t offset = mIsAvc? mOwner->addLengthPrefixedSample_l(copy) 2208 : mOwner->addSample_l(copy); 2209 2210 uint32_t count = (mOwner->use32BitFileOffset() 2211 ? mStcoTableEntries->count() 2212 : mCo64TableEntries->count()); 2213 2214 if (count == 0) { 2215 addChunkOffset(offset); 2216 } 2217 copy->release(); 2218 copy = NULL; 2219 continue; 2220 } 2221 2222 mChunkSamples.push_back(copy); 2223 if (interleaveDurationUs == 0) { 2224 addOneStscTableEntry(++nChunks, 1); 2225 bufferChunk(timestampUs); 2226 } else { 2227 if (chunkTimestampUs == 0) { 2228 chunkTimestampUs = timestampUs; 2229 } else { 2230 int64_t chunkDurationUs = timestampUs - chunkTimestampUs; 2231 if (chunkDurationUs > interleaveDurationUs) { 2232 if (chunkDurationUs > mMaxChunkDurationUs) { 2233 mMaxChunkDurationUs = chunkDurationUs; 2234 } 2235 ++nChunks; 2236 if (nChunks == 1 || // First chunk 2237 lastSamplesPerChunk != mChunkSamples.size()) { 2238 lastSamplesPerChunk = mChunkSamples.size(); 2239 addOneStscTableEntry(nChunks, lastSamplesPerChunk); 2240 } 2241 bufferChunk(timestampUs); 2242 chunkTimestampUs = timestampUs; 2243 } 2244 } 2245 } 2246 2247 } 2248 2249 if (isTrackMalFormed()) { 2250 err = ERROR_MALFORMED; 2251 } 2252 2253 mOwner->trackProgressStatus(mTrackId, -1, err); 2254 2255 // Last chunk 2256 if (!hasMultipleTracks) { 2257 addOneStscTableEntry(1, mStszTableEntries->count()); 2258 } else if (!mChunkSamples.empty()) { 2259 addOneStscTableEntry(++nChunks, mChunkSamples.size()); 2260 bufferChunk(timestampUs); 2261 } 2262 2263 // We don't really know how long the last frame lasts, since 2264 // there is no frame time after it, just repeat the previous 2265 // frame's duration. 2266 if (mStszTableEntries->count() == 1) { 2267 lastDurationUs = 0; // A single sample's duration 2268 lastDurationTicks = 0; 2269 } else { 2270 ++sampleCount; // Count for the last sample 2271 } 2272 2273 if (mStszTableEntries->count() <= 2) { 2274 addOneSttsTableEntry(1, lastDurationTicks); 2275 if (sampleCount - 1 > 0) { 2276 addOneSttsTableEntry(sampleCount - 1, lastDurationTicks); 2277 } 2278 } else { 2279 addOneSttsTableEntry(sampleCount, lastDurationTicks); 2280 } 2281 2282 // The last ctts box may not have been written yet, and this 2283 // is to make sure that we write out the last ctts box. 2284 if (currCttsOffsetTimeTicks == lastCttsOffsetTimeTicks) { 2285 if (cttsSampleCount > 0) { 2286 addOneCttsTableEntry(cttsSampleCount, lastCttsOffsetTimeTicks); 2287 } 2288 } 2289 2290 mTrackDurationUs += lastDurationUs; 2291 mReachedEOS = true; 2292 2293 sendTrackSummary(hasMultipleTracks); 2294 2295 ALOGI("Received total/0-length (%d/%d) buffers and encoded %d frames. - %s", 2296 count, nZeroLengthFrames, mStszTableEntries->count(), mIsAudio? "audio": "video"); 2297 if (mIsAudio) { 2298 ALOGI("Audio track drift time: %lld us", mOwner->getDriftTimeUs()); 2299 } 2300 2301 if (err == ERROR_END_OF_STREAM) { 2302 return OK; 2303 } 2304 return err; 2305} 2306 2307bool MPEG4Writer::Track::isTrackMalFormed() const { 2308 if (mStszTableEntries->count() == 0) { // no samples written 2309 ALOGE("The number of recorded samples is 0"); 2310 return true; 2311 } 2312 2313 if (!mIsAudio && mStssTableEntries->count() == 0) { // no sync frames for video 2314 ALOGE("There are no sync frames for video track"); 2315 return true; 2316 } 2317 2318 if (OK != checkCodecSpecificData()) { // no codec specific data 2319 return true; 2320 } 2321 2322 return false; 2323} 2324 2325void MPEG4Writer::Track::sendTrackSummary(bool hasMultipleTracks) { 2326 2327 // Send track summary only if test mode is enabled. 2328 if (!isTestModeEnabled()) { 2329 return; 2330 } 2331 2332 int trackNum = (mTrackId << 28); 2333 2334 mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2335 trackNum | MEDIA_RECORDER_TRACK_INFO_TYPE, 2336 mIsAudio? 0: 1); 2337 2338 mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2339 trackNum | MEDIA_RECORDER_TRACK_INFO_DURATION_MS, 2340 mTrackDurationUs / 1000); 2341 2342 mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2343 trackNum | MEDIA_RECORDER_TRACK_INFO_ENCODED_FRAMES, 2344 mStszTableEntries->count()); 2345 2346 { 2347 // The system delay time excluding the requested initial delay that 2348 // is used to eliminate the recording sound. 2349 int64_t startTimeOffsetUs = mOwner->getStartTimeOffsetMs() * 1000LL; 2350 if (startTimeOffsetUs < 0) { // Start time offset was not set 2351 startTimeOffsetUs = kInitialDelayTimeUs; 2352 } 2353 int64_t initialDelayUs = 2354 mFirstSampleTimeRealUs - mStartTimeRealUs - startTimeOffsetUs; 2355 2356 mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2357 trackNum | MEDIA_RECORDER_TRACK_INFO_INITIAL_DELAY_MS, 2358 (initialDelayUs) / 1000); 2359 } 2360 2361 mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2362 trackNum | MEDIA_RECORDER_TRACK_INFO_DATA_KBYTES, 2363 mMdatSizeBytes / 1024); 2364 2365 if (hasMultipleTracks) { 2366 mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2367 trackNum | MEDIA_RECORDER_TRACK_INFO_MAX_CHUNK_DUR_MS, 2368 mMaxChunkDurationUs / 1000); 2369 2370 int64_t moovStartTimeUs = mOwner->getStartTimestampUs(); 2371 if (mStartTimestampUs != moovStartTimeUs) { 2372 int64_t startTimeOffsetUs = mStartTimestampUs - moovStartTimeUs; 2373 mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2374 trackNum | MEDIA_RECORDER_TRACK_INFO_START_OFFSET_MS, 2375 startTimeOffsetUs / 1000); 2376 } 2377 } 2378} 2379 2380void MPEG4Writer::Track::trackProgressStatus(int64_t timeUs, status_t err) { 2381 ALOGV("trackProgressStatus: %lld us", timeUs); 2382 2383 if (mTrackEveryTimeDurationUs > 0 && 2384 timeUs - mPreviousTrackTimeUs >= mTrackEveryTimeDurationUs) { 2385 ALOGV("Fire time tracking progress status at %lld us", timeUs); 2386 mOwner->trackProgressStatus(mTrackId, timeUs - mPreviousTrackTimeUs, err); 2387 mPreviousTrackTimeUs = timeUs; 2388 } 2389} 2390 2391void MPEG4Writer::trackProgressStatus( 2392 size_t trackId, int64_t timeUs, status_t err) { 2393 Mutex::Autolock lock(mLock); 2394 int32_t trackNum = (trackId << 28); 2395 2396 // Error notification 2397 // Do not consider ERROR_END_OF_STREAM an error 2398 if (err != OK && err != ERROR_END_OF_STREAM) { 2399 notify(MEDIA_RECORDER_TRACK_EVENT_ERROR, 2400 trackNum | MEDIA_RECORDER_TRACK_ERROR_GENERAL, 2401 err); 2402 return; 2403 } 2404 2405 if (timeUs == -1) { 2406 // Send completion notification 2407 notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2408 trackNum | MEDIA_RECORDER_TRACK_INFO_COMPLETION_STATUS, 2409 err); 2410 } else { 2411 // Send progress status 2412 notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2413 trackNum | MEDIA_RECORDER_TRACK_INFO_PROGRESS_IN_TIME, 2414 timeUs / 1000); 2415 } 2416} 2417 2418void MPEG4Writer::setDriftTimeUs(int64_t driftTimeUs) { 2419 ALOGV("setDriftTimeUs: %lld us", driftTimeUs); 2420 Mutex::Autolock autolock(mLock); 2421 mDriftTimeUs = driftTimeUs; 2422} 2423 2424int64_t MPEG4Writer::getDriftTimeUs() { 2425 ALOGV("getDriftTimeUs: %lld us", mDriftTimeUs); 2426 Mutex::Autolock autolock(mLock); 2427 return mDriftTimeUs; 2428} 2429 2430bool MPEG4Writer::useNalLengthFour() { 2431 return mUse4ByteNalLength; 2432} 2433 2434void MPEG4Writer::Track::bufferChunk(int64_t timestampUs) { 2435 ALOGV("bufferChunk"); 2436 2437 Chunk chunk(this, timestampUs, mChunkSamples); 2438 mOwner->bufferChunk(chunk); 2439 mChunkSamples.clear(); 2440} 2441 2442int64_t MPEG4Writer::Track::getDurationUs() const { 2443 return mTrackDurationUs; 2444} 2445 2446int64_t MPEG4Writer::Track::getEstimatedTrackSizeBytes() const { 2447 return mEstimatedTrackSizeBytes; 2448} 2449 2450status_t MPEG4Writer::Track::checkCodecSpecificData() const { 2451 const char *mime; 2452 CHECK(mMeta->findCString(kKeyMIMEType, &mime)); 2453 if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AAC, mime) || 2454 !strcasecmp(MEDIA_MIMETYPE_VIDEO_MPEG4, mime) || 2455 !strcasecmp(MEDIA_MIMETYPE_VIDEO_AVC, mime)) { 2456 if (!mCodecSpecificData || 2457 mCodecSpecificDataSize <= 0) { 2458 ALOGE("Missing codec specific data"); 2459 return ERROR_MALFORMED; 2460 } 2461 } else { 2462 if (mCodecSpecificData || 2463 mCodecSpecificDataSize > 0) { 2464 ALOGE("Unexepected codec specific data found"); 2465 return ERROR_MALFORMED; 2466 } 2467 } 2468 return OK; 2469} 2470 2471void MPEG4Writer::Track::writeTrackHeader(bool use32BitOffset) { 2472 2473 ALOGV("%s track time scale: %d", 2474 mIsAudio? "Audio": "Video", mTimeScale); 2475 2476 time_t now = time(NULL); 2477 mOwner->beginBox("trak"); 2478 writeTkhdBox(now); 2479 mOwner->beginBox("mdia"); 2480 writeMdhdBox(now); 2481 writeHdlrBox(); 2482 mOwner->beginBox("minf"); 2483 if (mIsAudio) { 2484 writeSmhdBox(); 2485 } else { 2486 writeVmhdBox(); 2487 } 2488 writeDinfBox(); 2489 writeStblBox(use32BitOffset); 2490 mOwner->endBox(); // minf 2491 mOwner->endBox(); // mdia 2492 mOwner->endBox(); // trak 2493} 2494 2495void MPEG4Writer::Track::writeStblBox(bool use32BitOffset) { 2496 mOwner->beginBox("stbl"); 2497 mOwner->beginBox("stsd"); 2498 mOwner->writeInt32(0); // version=0, flags=0 2499 mOwner->writeInt32(1); // entry count 2500 if (mIsAudio) { 2501 writeAudioFourCCBox(); 2502 } else { 2503 writeVideoFourCCBox(); 2504 } 2505 mOwner->endBox(); // stsd 2506 writeSttsBox(); 2507 writeCttsBox(); 2508 if (!mIsAudio) { 2509 writeStssBox(); 2510 } 2511 writeStszBox(); 2512 writeStscBox(); 2513 writeStcoBox(use32BitOffset); 2514 mOwner->endBox(); // stbl 2515} 2516 2517void MPEG4Writer::Track::writeVideoFourCCBox() { 2518 const char *mime; 2519 bool success = mMeta->findCString(kKeyMIMEType, &mime); 2520 CHECK(success); 2521 if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_MPEG4, mime)) { 2522 mOwner->beginBox("mp4v"); 2523 } else if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_H263, mime)) { 2524 mOwner->beginBox("s263"); 2525 } else if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_AVC, mime)) { 2526 mOwner->beginBox("avc1"); 2527 } else { 2528 ALOGE("Unknown mime type '%s'.", mime); 2529 CHECK(!"should not be here, unknown mime type."); 2530 } 2531 2532 mOwner->writeInt32(0); // reserved 2533 mOwner->writeInt16(0); // reserved 2534 mOwner->writeInt16(1); // data ref index 2535 mOwner->writeInt16(0); // predefined 2536 mOwner->writeInt16(0); // reserved 2537 mOwner->writeInt32(0); // predefined 2538 mOwner->writeInt32(0); // predefined 2539 mOwner->writeInt32(0); // predefined 2540 2541 int32_t width, height; 2542 success = mMeta->findInt32(kKeyWidth, &width); 2543 success = success && mMeta->findInt32(kKeyHeight, &height); 2544 CHECK(success); 2545 2546 mOwner->writeInt16(width); 2547 mOwner->writeInt16(height); 2548 mOwner->writeInt32(0x480000); // horiz resolution 2549 mOwner->writeInt32(0x480000); // vert resolution 2550 mOwner->writeInt32(0); // reserved 2551 mOwner->writeInt16(1); // frame count 2552 mOwner->write(" ", 32); 2553 mOwner->writeInt16(0x18); // depth 2554 mOwner->writeInt16(-1); // predefined 2555 2556 CHECK_LT(23 + mCodecSpecificDataSize, 128); 2557 2558 if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_MPEG4, mime)) { 2559 writeMp4vEsdsBox(); 2560 } else if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_H263, mime)) { 2561 writeD263Box(); 2562 } else if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_AVC, mime)) { 2563 writeAvccBox(); 2564 } 2565 2566 writePaspBox(); 2567 mOwner->endBox(); // mp4v, s263 or avc1 2568} 2569 2570void MPEG4Writer::Track::writeAudioFourCCBox() { 2571 const char *mime; 2572 bool success = mMeta->findCString(kKeyMIMEType, &mime); 2573 CHECK(success); 2574 const char *fourcc = NULL; 2575 if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AMR_NB, mime)) { 2576 fourcc = "samr"; 2577 } else if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AMR_WB, mime)) { 2578 fourcc = "sawb"; 2579 } else if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AAC, mime)) { 2580 fourcc = "mp4a"; 2581 } else { 2582 ALOGE("Unknown mime type '%s'.", mime); 2583 CHECK(!"should not be here, unknown mime type."); 2584 } 2585 2586 mOwner->beginBox(fourcc); // audio format 2587 mOwner->writeInt32(0); // reserved 2588 mOwner->writeInt16(0); // reserved 2589 mOwner->writeInt16(0x1); // data ref index 2590 mOwner->writeInt32(0); // reserved 2591 mOwner->writeInt32(0); // reserved 2592 int32_t nChannels; 2593 CHECK_EQ(true, mMeta->findInt32(kKeyChannelCount, &nChannels)); 2594 mOwner->writeInt16(nChannels); // channel count 2595 mOwner->writeInt16(16); // sample size 2596 mOwner->writeInt16(0); // predefined 2597 mOwner->writeInt16(0); // reserved 2598 2599 int32_t samplerate; 2600 success = mMeta->findInt32(kKeySampleRate, &samplerate); 2601 CHECK(success); 2602 mOwner->writeInt32(samplerate << 16); 2603 if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AAC, mime)) { 2604 writeMp4aEsdsBox(); 2605 } else if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AMR_NB, mime) || 2606 !strcasecmp(MEDIA_MIMETYPE_AUDIO_AMR_WB, mime)) { 2607 writeDamrBox(); 2608 } 2609 mOwner->endBox(); 2610} 2611 2612void MPEG4Writer::Track::writeMp4aEsdsBox() { 2613 mOwner->beginBox("esds"); 2614 CHECK(mCodecSpecificData); 2615 CHECK_GT(mCodecSpecificDataSize, 0); 2616 2617 // Make sure all sizes encode to a single byte. 2618 CHECK_LT(mCodecSpecificDataSize + 23, 128); 2619 2620 mOwner->writeInt32(0); // version=0, flags=0 2621 mOwner->writeInt8(0x03); // ES_DescrTag 2622 mOwner->writeInt8(23 + mCodecSpecificDataSize); 2623 mOwner->writeInt16(0x0000);// ES_ID 2624 mOwner->writeInt8(0x00); 2625 2626 mOwner->writeInt8(0x04); // DecoderConfigDescrTag 2627 mOwner->writeInt8(15 + mCodecSpecificDataSize); 2628 mOwner->writeInt8(0x40); // objectTypeIndication ISO/IEC 14492-2 2629 mOwner->writeInt8(0x15); // streamType AudioStream 2630 2631 mOwner->writeInt16(0x03); // XXX 2632 mOwner->writeInt8(0x00); // buffer size 24-bit 2633 mOwner->writeInt32(96000); // max bit rate 2634 mOwner->writeInt32(96000); // avg bit rate 2635 2636 mOwner->writeInt8(0x05); // DecoderSpecificInfoTag 2637 mOwner->writeInt8(mCodecSpecificDataSize); 2638 mOwner->write(mCodecSpecificData, mCodecSpecificDataSize); 2639 2640 static const uint8_t kData2[] = { 2641 0x06, // SLConfigDescriptorTag 2642 0x01, 2643 0x02 2644 }; 2645 mOwner->write(kData2, sizeof(kData2)); 2646 2647 mOwner->endBox(); // esds 2648} 2649 2650void MPEG4Writer::Track::writeMp4vEsdsBox() { 2651 CHECK(mCodecSpecificData); 2652 CHECK_GT(mCodecSpecificDataSize, 0); 2653 mOwner->beginBox("esds"); 2654 2655 mOwner->writeInt32(0); // version=0, flags=0 2656 2657 mOwner->writeInt8(0x03); // ES_DescrTag 2658 mOwner->writeInt8(23 + mCodecSpecificDataSize); 2659 mOwner->writeInt16(0x0000); // ES_ID 2660 mOwner->writeInt8(0x1f); 2661 2662 mOwner->writeInt8(0x04); // DecoderConfigDescrTag 2663 mOwner->writeInt8(15 + mCodecSpecificDataSize); 2664 mOwner->writeInt8(0x20); // objectTypeIndication ISO/IEC 14492-2 2665 mOwner->writeInt8(0x11); // streamType VisualStream 2666 2667 static const uint8_t kData[] = { 2668 0x01, 0x77, 0x00, 2669 0x00, 0x03, 0xe8, 0x00, 2670 0x00, 0x03, 0xe8, 0x00 2671 }; 2672 mOwner->write(kData, sizeof(kData)); 2673 2674 mOwner->writeInt8(0x05); // DecoderSpecificInfoTag 2675 2676 mOwner->writeInt8(mCodecSpecificDataSize); 2677 mOwner->write(mCodecSpecificData, mCodecSpecificDataSize); 2678 2679 static const uint8_t kData2[] = { 2680 0x06, // SLConfigDescriptorTag 2681 0x01, 2682 0x02 2683 }; 2684 mOwner->write(kData2, sizeof(kData2)); 2685 2686 mOwner->endBox(); // esds 2687} 2688 2689void MPEG4Writer::Track::writeTkhdBox(time_t now) { 2690 mOwner->beginBox("tkhd"); 2691 // Flags = 7 to indicate that the track is enabled, and 2692 // part of the presentation 2693 mOwner->writeInt32(0x07); // version=0, flags=7 2694 mOwner->writeInt32(now); // creation time 2695 mOwner->writeInt32(now); // modification time 2696 mOwner->writeInt32(mTrackId); // track id starts with 1 2697 mOwner->writeInt32(0); // reserved 2698 int64_t trakDurationUs = getDurationUs(); 2699 int32_t mvhdTimeScale = mOwner->getTimeScale(); 2700 int32_t tkhdDuration = 2701 (trakDurationUs * mvhdTimeScale + 5E5) / 1E6; 2702 mOwner->writeInt32(tkhdDuration); // in mvhd timescale 2703 mOwner->writeInt32(0); // reserved 2704 mOwner->writeInt32(0); // reserved 2705 mOwner->writeInt16(0); // layer 2706 mOwner->writeInt16(0); // alternate group 2707 mOwner->writeInt16(mIsAudio ? 0x100 : 0); // volume 2708 mOwner->writeInt16(0); // reserved 2709 2710 mOwner->writeCompositionMatrix(mRotation); // matrix 2711 2712 if (mIsAudio) { 2713 mOwner->writeInt32(0); 2714 mOwner->writeInt32(0); 2715 } else { 2716 int32_t width, height; 2717 bool success = mMeta->findInt32(kKeyWidth, &width); 2718 success = success && mMeta->findInt32(kKeyHeight, &height); 2719 CHECK(success); 2720 2721 mOwner->writeInt32(width << 16); // 32-bit fixed-point value 2722 mOwner->writeInt32(height << 16); // 32-bit fixed-point value 2723 } 2724 mOwner->endBox(); // tkhd 2725} 2726 2727void MPEG4Writer::Track::writeVmhdBox() { 2728 mOwner->beginBox("vmhd"); 2729 mOwner->writeInt32(0x01); // version=0, flags=1 2730 mOwner->writeInt16(0); // graphics mode 2731 mOwner->writeInt16(0); // opcolor 2732 mOwner->writeInt16(0); 2733 mOwner->writeInt16(0); 2734 mOwner->endBox(); 2735} 2736 2737void MPEG4Writer::Track::writeSmhdBox() { 2738 mOwner->beginBox("smhd"); 2739 mOwner->writeInt32(0); // version=0, flags=0 2740 mOwner->writeInt16(0); // balance 2741 mOwner->writeInt16(0); // reserved 2742 mOwner->endBox(); 2743} 2744 2745void MPEG4Writer::Track::writeHdlrBox() { 2746 mOwner->beginBox("hdlr"); 2747 mOwner->writeInt32(0); // version=0, flags=0 2748 mOwner->writeInt32(0); // component type: should be mhlr 2749 mOwner->writeFourcc(mIsAudio ? "soun" : "vide"); // component subtype 2750 mOwner->writeInt32(0); // reserved 2751 mOwner->writeInt32(0); // reserved 2752 mOwner->writeInt32(0); // reserved 2753 // Removing "r" for the name string just makes the string 4 byte aligned 2754 mOwner->writeCString(mIsAudio ? "SoundHandle": "VideoHandle"); // name 2755 mOwner->endBox(); 2756} 2757 2758void MPEG4Writer::Track::writeMdhdBox(time_t now) { 2759 int64_t trakDurationUs = getDurationUs(); 2760 mOwner->beginBox("mdhd"); 2761 mOwner->writeInt32(0); // version=0, flags=0 2762 mOwner->writeInt32(now); // creation time 2763 mOwner->writeInt32(now); // modification time 2764 mOwner->writeInt32(mTimeScale); // media timescale 2765 int32_t mdhdDuration = (trakDurationUs * mTimeScale + 5E5) / 1E6; 2766 mOwner->writeInt32(mdhdDuration); // use media timescale 2767 // Language follows the three letter standard ISO-639-2/T 2768 // 'e', 'n', 'g' for "English", for instance. 2769 // Each character is packed as the difference between its ASCII value and 0x60. 2770 // For "English", these are 00101, 01110, 00111. 2771 // XXX: Where is the padding bit located: 0x15C7? 2772 mOwner->writeInt16(0); // language code 2773 mOwner->writeInt16(0); // predefined 2774 mOwner->endBox(); 2775} 2776 2777void MPEG4Writer::Track::writeDamrBox() { 2778 // 3gpp2 Spec AMRSampleEntry fields 2779 mOwner->beginBox("damr"); 2780 mOwner->writeCString(" "); // vendor: 4 bytes 2781 mOwner->writeInt8(0); // decoder version 2782 mOwner->writeInt16(0x83FF); // mode set: all enabled 2783 mOwner->writeInt8(0); // mode change period 2784 mOwner->writeInt8(1); // frames per sample 2785 mOwner->endBox(); 2786} 2787 2788void MPEG4Writer::Track::writeUrlBox() { 2789 // The table index here refers to the sample description index 2790 // in the sample table entries. 2791 mOwner->beginBox("url "); 2792 mOwner->writeInt32(1); // version=0, flags=1 (self-contained) 2793 mOwner->endBox(); // url 2794} 2795 2796void MPEG4Writer::Track::writeDrefBox() { 2797 mOwner->beginBox("dref"); 2798 mOwner->writeInt32(0); // version=0, flags=0 2799 mOwner->writeInt32(1); // entry count (either url or urn) 2800 writeUrlBox(); 2801 mOwner->endBox(); // dref 2802} 2803 2804void MPEG4Writer::Track::writeDinfBox() { 2805 mOwner->beginBox("dinf"); 2806 writeDrefBox(); 2807 mOwner->endBox(); // dinf 2808} 2809 2810void MPEG4Writer::Track::writeAvccBox() { 2811 CHECK(mCodecSpecificData); 2812 CHECK_GE(mCodecSpecificDataSize, 5); 2813 2814 // Patch avcc's lengthSize field to match the number 2815 // of bytes we use to indicate the size of a nal unit. 2816 uint8_t *ptr = (uint8_t *)mCodecSpecificData; 2817 ptr[4] = (ptr[4] & 0xfc) | (mOwner->useNalLengthFour() ? 3 : 1); 2818 mOwner->beginBox("avcC"); 2819 mOwner->write(mCodecSpecificData, mCodecSpecificDataSize); 2820 mOwner->endBox(); // avcC 2821} 2822 2823void MPEG4Writer::Track::writeD263Box() { 2824 mOwner->beginBox("d263"); 2825 mOwner->writeInt32(0); // vendor 2826 mOwner->writeInt8(0); // decoder version 2827 mOwner->writeInt8(10); // level: 10 2828 mOwner->writeInt8(0); // profile: 0 2829 mOwner->endBox(); // d263 2830} 2831 2832// This is useful if the pixel is not square 2833void MPEG4Writer::Track::writePaspBox() { 2834 mOwner->beginBox("pasp"); 2835 mOwner->writeInt32(1 << 16); // hspacing 2836 mOwner->writeInt32(1 << 16); // vspacing 2837 mOwner->endBox(); // pasp 2838} 2839 2840int32_t MPEG4Writer::Track::getStartTimeOffsetScaledTime() const { 2841 int64_t trackStartTimeOffsetUs = 0; 2842 int64_t moovStartTimeUs = mOwner->getStartTimestampUs(); 2843 if (mStartTimestampUs != moovStartTimeUs) { 2844 CHECK_GT(mStartTimestampUs, moovStartTimeUs); 2845 trackStartTimeOffsetUs = mStartTimestampUs - moovStartTimeUs; 2846 } 2847 return (trackStartTimeOffsetUs * mTimeScale + 500000LL) / 1000000LL; 2848} 2849 2850void MPEG4Writer::Track::writeSttsBox() { 2851 mOwner->beginBox("stts"); 2852 mOwner->writeInt32(0); // version=0, flags=0 2853 uint32_t duration; 2854 CHECK(mSttsTableEntries->get(duration, 1)); 2855 duration = htonl(duration); // Back to host byte order 2856 mSttsTableEntries->set(htonl(duration + getStartTimeOffsetScaledTime()), 1); 2857 mSttsTableEntries->write(mOwner); 2858 mOwner->endBox(); // stts 2859} 2860 2861void MPEG4Writer::Track::writeCttsBox() { 2862 if (mIsAudio) { // ctts is not for audio 2863 return; 2864 } 2865 2866 // There is no B frame at all 2867 if (mMinCttsOffsetTimeUs == mMaxCttsOffsetTimeUs) { 2868 return; 2869 } 2870 2871 // Do not write ctts box when there is no need to have it. 2872 if (mCttsTableEntries->count() == 0) { 2873 return; 2874 } 2875 2876 ALOGV("ctts box has %d entries with range [%lld, %lld]", 2877 mCttsTableEntries->count(), mMinCttsOffsetTimeUs, mMaxCttsOffsetTimeUs); 2878 2879 mOwner->beginBox("ctts"); 2880 mOwner->writeInt32(0); // version=0, flags=0 2881 uint32_t duration; 2882 CHECK(mCttsTableEntries->get(duration, 1)); 2883 duration = htonl(duration); // Back host byte order 2884 mCttsTableEntries->set(htonl(duration + getStartTimeOffsetScaledTime() - mMinCttsOffsetTimeUs), 1); 2885 mCttsTableEntries->write(mOwner); 2886 mOwner->endBox(); // ctts 2887} 2888 2889void MPEG4Writer::Track::writeStssBox() { 2890 mOwner->beginBox("stss"); 2891 mOwner->writeInt32(0); // version=0, flags=0 2892 mStssTableEntries->write(mOwner); 2893 mOwner->endBox(); // stss 2894} 2895 2896void MPEG4Writer::Track::writeStszBox() { 2897 mOwner->beginBox("stsz"); 2898 mOwner->writeInt32(0); // version=0, flags=0 2899 mOwner->writeInt32(0); 2900 mStszTableEntries->write(mOwner); 2901 mOwner->endBox(); // stsz 2902} 2903 2904void MPEG4Writer::Track::writeStscBox() { 2905 mOwner->beginBox("stsc"); 2906 mOwner->writeInt32(0); // version=0, flags=0 2907 mStscTableEntries->write(mOwner); 2908 mOwner->endBox(); // stsc 2909} 2910 2911void MPEG4Writer::Track::writeStcoBox(bool use32BitOffset) { 2912 mOwner->beginBox(use32BitOffset? "stco": "co64"); 2913 mOwner->writeInt32(0); // version=0, flags=0 2914 if (use32BitOffset) { 2915 mStcoTableEntries->write(mOwner); 2916 } else { 2917 mCo64TableEntries->write(mOwner); 2918 } 2919 mOwner->endBox(); // stco or co64 2920} 2921 2922void MPEG4Writer::writeUdtaBox() { 2923 beginBox("udta"); 2924 writeGeoDataBox(); 2925 endBox(); 2926} 2927 2928/* 2929 * Geodata is stored according to ISO-6709 standard. 2930 */ 2931void MPEG4Writer::writeGeoDataBox() { 2932 beginBox("\xA9xyz"); 2933 /* 2934 * For historical reasons, any user data start 2935 * with "\0xA9", must be followed by its assoicated 2936 * language code. 2937 * 0x0012: text string length 2938 * 0x15c7: lang (locale) code: en 2939 */ 2940 writeInt32(0x001215c7); 2941 writeLatitude(mLatitudex10000); 2942 writeLongitude(mLongitudex10000); 2943 writeInt8(0x2F); 2944 endBox(); 2945} 2946 2947} // namespace android 2948