MPEG4Writer.cpp revision 4491a4ab2d6991baa1ce15f24025aa24430d15d1
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 20#include <arpa/inet.h> 21#include <fcntl.h> 22#include <inttypes.h> 23#include <pthread.h> 24#include <sys/prctl.h> 25#include <sys/stat.h> 26#include <sys/types.h> 27#include <unistd.h> 28 29#include <utils/Log.h> 30 31#include <media/stagefright/foundation/ADebug.h> 32#include <media/stagefright/MPEG4Writer.h> 33#include <media/stagefright/MediaBuffer.h> 34#include <media/stagefright/MetaData.h> 35#include <media/stagefright/MediaDefs.h> 36#include <media/stagefright/MediaErrors.h> 37#include <media/stagefright/MediaSource.h> 38#include <media/stagefright/Utils.h> 39#include <media/mediarecorder.h> 40#include <cutils/properties.h> 41 42#include "include/ESDS.h" 43 44 45#ifndef __predict_false 46#define __predict_false(exp) __builtin_expect((exp) != 0, 0) 47#endif 48 49#define WARN_UNLESS(condition, message, ...) \ 50( (__predict_false(condition)) ? false : ({ \ 51 ALOGW("Condition %s failed " message, #condition, ##__VA_ARGS__); \ 52 true; \ 53})) 54 55namespace android { 56 57static const int64_t kMinStreamableFileSizeInBytes = 5 * 1024 * 1024; 58static const int64_t kMax32BitFileSize = 0x00ffffffffLL; // 2^32-1 : max FAT32 59 // filesystem file size 60 // used by most SD cards 61static const uint8_t kNalUnitTypeSeqParamSet = 0x07; 62static const uint8_t kNalUnitTypePicParamSet = 0x08; 63static const int64_t kInitialDelayTimeUs = 700000LL; 64 65class MPEG4Writer::Track { 66public: 67 Track(MPEG4Writer *owner, const sp<MediaSource> &source, size_t trackId); 68 69 ~Track(); 70 71 status_t start(MetaData *params); 72 status_t stop(); 73 status_t pause(); 74 bool reachedEOS(); 75 76 int64_t getDurationUs() const; 77 int64_t getEstimatedTrackSizeBytes() const; 78 void writeTrackHeader(bool use32BitOffset = true); 79 void bufferChunk(int64_t timestampUs); 80 bool isAvc() const { return mIsAvc; } 81 bool isAudio() const { return mIsAudio; } 82 bool isMPEG4() const { return mIsMPEG4; } 83 void addChunkOffset(off64_t offset); 84 int32_t getTrackId() const { return mTrackId; } 85 status_t dump(int fd, const Vector<String16>& args) const; 86 87private: 88 enum { 89 kMaxCttsOffsetTimeUs = 1000000LL, // 1 second 90 kSampleArraySize = 1000, 91 }; 92 93 // A helper class to handle faster write box with table entries 94 template<class TYPE> 95 struct ListTableEntries { 96 ListTableEntries(uint32_t elementCapacity, uint32_t entryCapacity) 97 : mElementCapacity(elementCapacity), 98 mEntryCapacity(entryCapacity), 99 mTotalNumTableEntries(0), 100 mNumValuesInCurrEntry(0), 101 mCurrTableEntriesElement(NULL) { 102 CHECK_GT(mElementCapacity, 0); 103 CHECK_GT(mEntryCapacity, 0); 104 } 105 106 // Free the allocated memory. 107 ~ListTableEntries() { 108 while (!mTableEntryList.empty()) { 109 typename List<TYPE *>::iterator it = mTableEntryList.begin(); 110 delete[] (*it); 111 mTableEntryList.erase(it); 112 } 113 } 114 115 // Replace the value at the given position by the given value. 116 // There must be an existing value at the given position. 117 // @arg value must be in network byte order 118 // @arg pos location the value must be in. 119 void set(const TYPE& value, uint32_t pos) { 120 CHECK_LT(pos, mTotalNumTableEntries * mEntryCapacity); 121 122 typename List<TYPE *>::iterator it = mTableEntryList.begin(); 123 uint32_t iterations = (pos / (mElementCapacity * mEntryCapacity)); 124 while (it != mTableEntryList.end() && iterations > 0) { 125 ++it; 126 --iterations; 127 } 128 CHECK(it != mTableEntryList.end()); 129 CHECK_EQ(iterations, 0); 130 131 (*it)[(pos % (mElementCapacity * mEntryCapacity))] = value; 132 } 133 134 // Get the value at the given position by the given value. 135 // @arg value the retrieved value at the position in network byte order. 136 // @arg pos location the value must be in. 137 // @return true if a value is found. 138 bool get(TYPE& value, uint32_t pos) const { 139 if (pos >= mTotalNumTableEntries * mEntryCapacity) { 140 return false; 141 } 142 143 typename List<TYPE *>::iterator it = mTableEntryList.begin(); 144 uint32_t iterations = (pos / (mElementCapacity * mEntryCapacity)); 145 while (it != mTableEntryList.end() && iterations > 0) { 146 ++it; 147 --iterations; 148 } 149 CHECK(it != mTableEntryList.end()); 150 CHECK_EQ(iterations, 0); 151 152 value = (*it)[(pos % (mElementCapacity * mEntryCapacity))]; 153 return true; 154 } 155 156 // Store a single value. 157 // @arg value must be in network byte order. 158 void add(const TYPE& value) { 159 CHECK_LT(mNumValuesInCurrEntry, mElementCapacity); 160 uint32_t nEntries = mTotalNumTableEntries % mElementCapacity; 161 uint32_t nValues = mNumValuesInCurrEntry % mEntryCapacity; 162 if (nEntries == 0 && nValues == 0) { 163 mCurrTableEntriesElement = new TYPE[mEntryCapacity * mElementCapacity]; 164 CHECK(mCurrTableEntriesElement != NULL); 165 mTableEntryList.push_back(mCurrTableEntriesElement); 166 } 167 168 uint32_t pos = nEntries * mEntryCapacity + nValues; 169 mCurrTableEntriesElement[pos] = value; 170 171 ++mNumValuesInCurrEntry; 172 if ((mNumValuesInCurrEntry % mEntryCapacity) == 0) { 173 ++mTotalNumTableEntries; 174 mNumValuesInCurrEntry = 0; 175 } 176 } 177 178 // Write out the table entries: 179 // 1. the number of entries goes first 180 // 2. followed by the values in the table enties in order 181 // @arg writer the writer to actual write to the storage 182 void write(MPEG4Writer *writer) const { 183 CHECK_EQ(mNumValuesInCurrEntry % mEntryCapacity, 0); 184 uint32_t nEntries = mTotalNumTableEntries; 185 writer->writeInt32(nEntries); 186 for (typename List<TYPE *>::iterator it = mTableEntryList.begin(); 187 it != mTableEntryList.end(); ++it) { 188 CHECK_GT(nEntries, 0); 189 if (nEntries >= mElementCapacity) { 190 writer->write(*it, sizeof(TYPE) * mEntryCapacity, mElementCapacity); 191 nEntries -= mElementCapacity; 192 } else { 193 writer->write(*it, sizeof(TYPE) * mEntryCapacity, nEntries); 194 break; 195 } 196 } 197 } 198 199 // Return the number of entries in the table. 200 uint32_t count() const { return mTotalNumTableEntries; } 201 202 private: 203 uint32_t mElementCapacity; // # entries in an element 204 uint32_t mEntryCapacity; // # of values in each entry 205 uint32_t mTotalNumTableEntries; 206 uint32_t mNumValuesInCurrEntry; // up to mEntryCapacity 207 TYPE *mCurrTableEntriesElement; 208 mutable List<TYPE *> mTableEntryList; 209 210 DISALLOW_EVIL_CONSTRUCTORS(ListTableEntries); 211 }; 212 213 214 215 MPEG4Writer *mOwner; 216 sp<MetaData> mMeta; 217 sp<MediaSource> mSource; 218 volatile bool mDone; 219 volatile bool mPaused; 220 volatile bool mResumed; 221 volatile bool mStarted; 222 bool mIsAvc; 223 bool mIsAudio; 224 bool mIsMPEG4; 225 int32_t mTrackId; 226 int64_t mTrackDurationUs; 227 int64_t mMaxChunkDurationUs; 228 229 int64_t mEstimatedTrackSizeBytes; 230 int64_t mMdatSizeBytes; 231 int32_t mTimeScale; 232 233 pthread_t mThread; 234 235 236 List<MediaBuffer *> mChunkSamples; 237 238 bool mSamplesHaveSameSize; 239 ListTableEntries<uint32_t> *mStszTableEntries; 240 241 ListTableEntries<uint32_t> *mStcoTableEntries; 242 ListTableEntries<off64_t> *mCo64TableEntries; 243 ListTableEntries<uint32_t> *mStscTableEntries; 244 ListTableEntries<uint32_t> *mStssTableEntries; 245 ListTableEntries<uint32_t> *mSttsTableEntries; 246 ListTableEntries<uint32_t> *mCttsTableEntries; 247 248 int64_t mMinCttsOffsetTimeUs; 249 int64_t mMaxCttsOffsetTimeUs; 250 251 // Sequence parameter set or picture parameter set 252 struct AVCParamSet { 253 AVCParamSet(uint16_t length, const uint8_t *data) 254 : mLength(length), mData(data) {} 255 256 uint16_t mLength; 257 const uint8_t *mData; 258 }; 259 List<AVCParamSet> mSeqParamSets; 260 List<AVCParamSet> mPicParamSets; 261 uint8_t mProfileIdc; 262 uint8_t mProfileCompatible; 263 uint8_t mLevelIdc; 264 265 void *mCodecSpecificData; 266 size_t mCodecSpecificDataSize; 267 bool mGotAllCodecSpecificData; 268 bool mTrackingProgressStatus; 269 270 bool mReachedEOS; 271 int64_t mStartTimestampUs; 272 int64_t mStartTimeRealUs; 273 int64_t mFirstSampleTimeRealUs; 274 int64_t mPreviousTrackTimeUs; 275 int64_t mTrackEveryTimeDurationUs; 276 277 // Update the audio track's drift information. 278 void updateDriftTime(const sp<MetaData>& meta); 279 280 int32_t getStartTimeOffsetScaledTime() const; 281 282 static void *ThreadWrapper(void *me); 283 status_t threadEntry(); 284 285 const uint8_t *parseParamSet( 286 const uint8_t *data, size_t length, int type, size_t *paramSetLen); 287 288 status_t makeAVCCodecSpecificData(const uint8_t *data, size_t size); 289 status_t copyAVCCodecSpecificData(const uint8_t *data, size_t size); 290 status_t parseAVCCodecSpecificData(const uint8_t *data, size_t size); 291 292 // Track authoring progress status 293 void trackProgressStatus(int64_t timeUs, status_t err = OK); 294 void initTrackingProgressStatus(MetaData *params); 295 296 void getCodecSpecificDataFromInputFormatIfPossible(); 297 298 // Determine the track time scale 299 // If it is an audio track, try to use the sampling rate as 300 // the time scale; however, if user chooses the overwrite 301 // value, the user-supplied time scale will be used. 302 void setTimeScale(); 303 304 // Simple validation on the codec specific data 305 status_t checkCodecSpecificData() const; 306 int32_t mRotation; 307 308 void updateTrackSizeEstimate(); 309 void addOneStscTableEntry(size_t chunkId, size_t sampleId); 310 void addOneStssTableEntry(size_t sampleId); 311 312 // Duration is time scale based 313 void addOneSttsTableEntry(size_t sampleCount, int32_t timescaledDur); 314 void addOneCttsTableEntry(size_t sampleCount, int32_t timescaledDur); 315 316 bool isTrackMalFormed() const; 317 void sendTrackSummary(bool hasMultipleTracks); 318 319 // Write the boxes 320 void writeStcoBox(bool use32BitOffset); 321 void writeStscBox(); 322 void writeStszBox(); 323 void writeStssBox(); 324 void writeSttsBox(); 325 void writeCttsBox(); 326 void writeD263Box(); 327 void writePaspBox(); 328 void writeAvccBox(); 329 void writeUrlBox(); 330 void writeDrefBox(); 331 void writeDinfBox(); 332 void writeDamrBox(); 333 void writeMdhdBox(uint32_t now); 334 void writeSmhdBox(); 335 void writeVmhdBox(); 336 void writeHdlrBox(); 337 void writeTkhdBox(uint32_t now); 338 void writeMp4aEsdsBox(); 339 void writeMp4vEsdsBox(); 340 void writeAudioFourCCBox(); 341 void writeVideoFourCCBox(); 342 void writeStblBox(bool use32BitOffset); 343 344 Track(const Track &); 345 Track &operator=(const Track &); 346}; 347 348MPEG4Writer::MPEG4Writer(const char *filename) 349 : mFd(-1), 350 mInitCheck(NO_INIT), 351 mIsRealTimeRecording(true), 352 mUse4ByteNalLength(true), 353 mUse32BitOffset(true), 354 mIsFileSizeLimitExplicitlyRequested(false), 355 mPaused(false), 356 mStarted(false), 357 mWriterThreadStarted(false), 358 mOffset(0), 359 mMdatOffset(0), 360 mEstimatedMoovBoxSize(0), 361 mInterleaveDurationUs(1000000), 362 mLatitudex10000(0), 363 mLongitudex10000(0), 364 mAreGeoTagsAvailable(false), 365 mStartTimeOffsetMs(-1) { 366 367 mFd = open(filename, O_CREAT | O_LARGEFILE | O_TRUNC | O_RDWR, S_IRUSR | S_IWUSR); 368 if (mFd >= 0) { 369 mInitCheck = OK; 370 } 371} 372 373MPEG4Writer::MPEG4Writer(int fd) 374 : mFd(dup(fd)), 375 mInitCheck(mFd < 0? NO_INIT: OK), 376 mIsRealTimeRecording(true), 377 mUse4ByteNalLength(true), 378 mUse32BitOffset(true), 379 mIsFileSizeLimitExplicitlyRequested(false), 380 mPaused(false), 381 mStarted(false), 382 mWriterThreadStarted(false), 383 mOffset(0), 384 mMdatOffset(0), 385 mEstimatedMoovBoxSize(0), 386 mInterleaveDurationUs(1000000), 387 mLatitudex10000(0), 388 mLongitudex10000(0), 389 mAreGeoTagsAvailable(false), 390 mStartTimeOffsetMs(-1) { 391} 392 393MPEG4Writer::~MPEG4Writer() { 394 reset(); 395 396 while (!mTracks.empty()) { 397 List<Track *>::iterator it = mTracks.begin(); 398 delete *it; 399 (*it) = NULL; 400 mTracks.erase(it); 401 } 402 mTracks.clear(); 403} 404 405status_t MPEG4Writer::dump( 406 int fd, const Vector<String16>& args) { 407 const size_t SIZE = 256; 408 char buffer[SIZE]; 409 String8 result; 410 snprintf(buffer, SIZE, " MPEG4Writer %p\n", this); 411 result.append(buffer); 412 snprintf(buffer, SIZE, " mStarted: %s\n", mStarted? "true": "false"); 413 result.append(buffer); 414 ::write(fd, result.string(), result.size()); 415 for (List<Track *>::iterator it = mTracks.begin(); 416 it != mTracks.end(); ++it) { 417 (*it)->dump(fd, args); 418 } 419 return OK; 420} 421 422status_t MPEG4Writer::Track::dump( 423 int fd, const Vector<String16>& /* args */) const { 424 const size_t SIZE = 256; 425 char buffer[SIZE]; 426 String8 result; 427 snprintf(buffer, SIZE, " %s track\n", mIsAudio? "Audio": "Video"); 428 result.append(buffer); 429 snprintf(buffer, SIZE, " reached EOS: %s\n", 430 mReachedEOS? "true": "false"); 431 result.append(buffer); 432 snprintf(buffer, SIZE, " frames encoded : %d\n", mStszTableEntries->count()); 433 result.append(buffer); 434 snprintf(buffer, SIZE, " duration encoded : %" PRId64 " us\n", mTrackDurationUs); 435 result.append(buffer); 436 ::write(fd, result.string(), result.size()); 437 return OK; 438} 439 440status_t MPEG4Writer::addSource(const sp<MediaSource> &source) { 441 Mutex::Autolock l(mLock); 442 if (mStarted) { 443 ALOGE("Attempt to add source AFTER recording is started"); 444 return UNKNOWN_ERROR; 445 } 446 447 // At most 2 tracks can be supported. 448 if (mTracks.size() >= 2) { 449 ALOGE("Too many tracks (%zu) to add", mTracks.size()); 450 return ERROR_UNSUPPORTED; 451 } 452 453 CHECK(source.get() != NULL); 454 455 // A track of type other than video or audio is not supported. 456 const char *mime; 457 source->getFormat()->findCString(kKeyMIMEType, &mime); 458 bool isAudio = !strncasecmp(mime, "audio/", 6); 459 bool isVideo = !strncasecmp(mime, "video/", 6); 460 if (!isAudio && !isVideo) { 461 ALOGE("Track (%s) other than video or audio is not supported", 462 mime); 463 return ERROR_UNSUPPORTED; 464 } 465 466 // At this point, we know the track to be added is either 467 // video or audio. Thus, we only need to check whether it 468 // is an audio track or not (if it is not, then it must be 469 // a video track). 470 471 // No more than one video or one audio track is supported. 472 for (List<Track*>::iterator it = mTracks.begin(); 473 it != mTracks.end(); ++it) { 474 if ((*it)->isAudio() == isAudio) { 475 ALOGE("%s track already exists", isAudio? "Audio": "Video"); 476 return ERROR_UNSUPPORTED; 477 } 478 } 479 480 // This is the first track of either audio or video. 481 // Go ahead to add the track. 482 Track *track = new Track(this, source, 1 + mTracks.size()); 483 mTracks.push_back(track); 484 485 return OK; 486} 487 488status_t MPEG4Writer::startTracks(MetaData *params) { 489 if (mTracks.empty()) { 490 ALOGE("No source added"); 491 return INVALID_OPERATION; 492 } 493 494 for (List<Track *>::iterator it = mTracks.begin(); 495 it != mTracks.end(); ++it) { 496 status_t err = (*it)->start(params); 497 498 if (err != OK) { 499 for (List<Track *>::iterator it2 = mTracks.begin(); 500 it2 != it; ++it2) { 501 (*it2)->stop(); 502 } 503 504 return err; 505 } 506 } 507 return OK; 508} 509 510int64_t MPEG4Writer::estimateMoovBoxSize(int32_t bitRate) { 511 // This implementation is highly experimental/heurisitic. 512 // 513 // Statistical analysis shows that metadata usually accounts 514 // for a small portion of the total file size, usually < 0.6%. 515 516 // The default MIN_MOOV_BOX_SIZE is set to 0.6% x 1MB / 2, 517 // where 1MB is the common file size limit for MMS application. 518 // The default MAX _MOOV_BOX_SIZE value is based on about 3 519 // minute video recording with a bit rate about 3 Mbps, because 520 // statistics also show that most of the video captured are going 521 // to be less than 3 minutes. 522 523 // If the estimation is wrong, we will pay the price of wasting 524 // some reserved space. This should not happen so often statistically. 525 static const int32_t factor = mUse32BitOffset? 1: 2; 526 static const int64_t MIN_MOOV_BOX_SIZE = 3 * 1024; // 3 KB 527 static const int64_t MAX_MOOV_BOX_SIZE = (180 * 3000000 * 6LL / 8000); 528 int64_t size = MIN_MOOV_BOX_SIZE; 529 530 // Max file size limit is set 531 if (mMaxFileSizeLimitBytes != 0 && mIsFileSizeLimitExplicitlyRequested) { 532 size = mMaxFileSizeLimitBytes * 6 / 1000; 533 } 534 535 // Max file duration limit is set 536 if (mMaxFileDurationLimitUs != 0) { 537 if (bitRate > 0) { 538 int64_t size2 = 539 ((mMaxFileDurationLimitUs * bitRate * 6) / 1000 / 8000000); 540 if (mMaxFileSizeLimitBytes != 0 && mIsFileSizeLimitExplicitlyRequested) { 541 // When both file size and duration limits are set, 542 // we use the smaller limit of the two. 543 if (size > size2) { 544 size = size2; 545 } 546 } else { 547 // Only max file duration limit is set 548 size = size2; 549 } 550 } 551 } 552 553 if (size < MIN_MOOV_BOX_SIZE) { 554 size = MIN_MOOV_BOX_SIZE; 555 } 556 557 // Any long duration recording will be probably end up with 558 // non-streamable mp4 file. 559 if (size > MAX_MOOV_BOX_SIZE) { 560 size = MAX_MOOV_BOX_SIZE; 561 } 562 563 ALOGI("limits: %" PRId64 "/%" PRId64 " bytes/us, bit rate: %d bps and the" 564 " estimated moov size %" PRId64 " bytes", 565 mMaxFileSizeLimitBytes, mMaxFileDurationLimitUs, bitRate, size); 566 return factor * size; 567} 568 569status_t MPEG4Writer::start(MetaData *param) { 570 if (mInitCheck != OK) { 571 return UNKNOWN_ERROR; 572 } 573 574 /* 575 * Check mMaxFileSizeLimitBytes at the beginning 576 * since mMaxFileSizeLimitBytes may be implicitly 577 * changed later for 32-bit file offset even if 578 * user does not ask to set it explicitly. 579 */ 580 if (mMaxFileSizeLimitBytes != 0) { 581 mIsFileSizeLimitExplicitlyRequested = true; 582 } 583 584 int32_t use64BitOffset; 585 if (param && 586 param->findInt32(kKey64BitFileOffset, &use64BitOffset) && 587 use64BitOffset) { 588 mUse32BitOffset = false; 589 } 590 591 if (mUse32BitOffset) { 592 // Implicit 32 bit file size limit 593 if (mMaxFileSizeLimitBytes == 0) { 594 mMaxFileSizeLimitBytes = kMax32BitFileSize; 595 } 596 597 // If file size is set to be larger than the 32 bit file 598 // size limit, treat it as an error. 599 if (mMaxFileSizeLimitBytes > kMax32BitFileSize) { 600 ALOGW("32-bit file size limit (%" PRId64 " bytes) too big. " 601 "It is changed to %" PRId64 " bytes", 602 mMaxFileSizeLimitBytes, kMax32BitFileSize); 603 mMaxFileSizeLimitBytes = kMax32BitFileSize; 604 } 605 } 606 607 int32_t use2ByteNalLength; 608 if (param && 609 param->findInt32(kKey2ByteNalLength, &use2ByteNalLength) && 610 use2ByteNalLength) { 611 mUse4ByteNalLength = false; 612 } 613 614 int32_t isRealTimeRecording; 615 if (param && param->findInt32(kKeyRealTimeRecording, &isRealTimeRecording)) { 616 mIsRealTimeRecording = isRealTimeRecording; 617 } 618 619 mStartTimestampUs = -1; 620 621 if (mStarted) { 622 if (mPaused) { 623 mPaused = false; 624 return startTracks(param); 625 } 626 return OK; 627 } 628 629 if (!param || 630 !param->findInt32(kKeyTimeScale, &mTimeScale)) { 631 mTimeScale = 1000; 632 } 633 CHECK_GT(mTimeScale, 0); 634 ALOGV("movie time scale: %d", mTimeScale); 635 636 /* 637 * When the requested file size limit is small, the priority 638 * is to meet the file size limit requirement, rather than 639 * to make the file streamable. mStreamableFile does not tell 640 * whether the actual recorded file is streamable or not. 641 */ 642 mStreamableFile = 643 (mMaxFileSizeLimitBytes != 0 && 644 mMaxFileSizeLimitBytes >= kMinStreamableFileSizeInBytes); 645 646 /* 647 * mWriteMoovBoxToMemory is true if the amount of data in moov box is 648 * smaller than the reserved free space at the beginning of a file, AND 649 * when the content of moov box is constructed. Note that video/audio 650 * frame data is always written to the file but not in the memory. 651 * 652 * Before stop()/reset() is called, mWriteMoovBoxToMemory is always 653 * false. When reset() is called at the end of a recording session, 654 * Moov box needs to be constructed. 655 * 656 * 1) Right before a moov box is constructed, mWriteMoovBoxToMemory 657 * to set to mStreamableFile so that if 658 * the file is intended to be streamable, it is set to true; 659 * otherwise, it is set to false. When the value is set to false, 660 * all the content of the moov box is written immediately to 661 * the end of the file. When the value is set to true, all the 662 * content of the moov box is written to an in-memory cache, 663 * mMoovBoxBuffer, util the following condition happens. Note 664 * that the size of the in-memory cache is the same as the 665 * reserved free space at the beginning of the file. 666 * 667 * 2) While the data of the moov box is written to an in-memory 668 * cache, the data size is checked against the reserved space. 669 * If the data size surpasses the reserved space, subsequent moov 670 * data could no longer be hold in the in-memory cache. This also 671 * indicates that the reserved space was too small. At this point, 672 * _all_ moov data must be written to the end of the file. 673 * mWriteMoovBoxToMemory must be set to false to direct the write 674 * to the file. 675 * 676 * 3) If the data size in moov box is smaller than the reserved 677 * space after moov box is completely constructed, the in-memory 678 * cache copy of the moov box is written to the reserved free 679 * space. Thus, immediately after the moov is completedly 680 * constructed, mWriteMoovBoxToMemory is always set to false. 681 */ 682 mWriteMoovBoxToMemory = false; 683 mMoovBoxBuffer = NULL; 684 mMoovBoxBufferOffset = 0; 685 686 writeFtypBox(param); 687 688 mFreeBoxOffset = mOffset; 689 690 if (mEstimatedMoovBoxSize == 0) { 691 int32_t bitRate = -1; 692 if (param) { 693 param->findInt32(kKeyBitRate, &bitRate); 694 } 695 mEstimatedMoovBoxSize = estimateMoovBoxSize(bitRate); 696 } 697 CHECK_GE(mEstimatedMoovBoxSize, 8); 698 if (mStreamableFile) { 699 // Reserve a 'free' box only for streamable file 700 lseek64(mFd, mFreeBoxOffset, SEEK_SET); 701 writeInt32(mEstimatedMoovBoxSize); 702 write("free", 4); 703 mMdatOffset = mFreeBoxOffset + mEstimatedMoovBoxSize; 704 } else { 705 mMdatOffset = mOffset; 706 } 707 708 mOffset = mMdatOffset; 709 lseek64(mFd, mMdatOffset, SEEK_SET); 710 if (mUse32BitOffset) { 711 write("????mdat", 8); 712 } else { 713 write("\x00\x00\x00\x01mdat????????", 16); 714 } 715 716 status_t err = startWriterThread(); 717 if (err != OK) { 718 return err; 719 } 720 721 err = startTracks(param); 722 if (err != OK) { 723 return err; 724 } 725 726 mStarted = true; 727 return OK; 728} 729 730bool MPEG4Writer::use32BitFileOffset() const { 731 return mUse32BitOffset; 732} 733 734status_t MPEG4Writer::pause() { 735 if (mInitCheck != OK) { 736 return OK; 737 } 738 mPaused = true; 739 status_t err = OK; 740 for (List<Track *>::iterator it = mTracks.begin(); 741 it != mTracks.end(); ++it) { 742 status_t status = (*it)->pause(); 743 if (status != OK) { 744 err = status; 745 } 746 } 747 return err; 748} 749 750void MPEG4Writer::stopWriterThread() { 751 ALOGD("Stopping writer thread"); 752 if (!mWriterThreadStarted) { 753 return; 754 } 755 756 { 757 Mutex::Autolock autolock(mLock); 758 759 mDone = true; 760 mChunkReadyCondition.signal(); 761 } 762 763 void *dummy; 764 pthread_join(mThread, &dummy); 765 mWriterThreadStarted = false; 766 ALOGD("Writer thread stopped"); 767} 768 769/* 770 * MP4 file standard defines a composition matrix: 771 * | a b u | 772 * | c d v | 773 * | x y w | 774 * 775 * the element in the matrix is stored in the following 776 * order: {a, b, u, c, d, v, x, y, w}, 777 * where a, b, c, d, x, and y is in 16.16 format, while 778 * u, v and w is in 2.30 format. 779 */ 780void MPEG4Writer::writeCompositionMatrix(int degrees) { 781 ALOGV("writeCompositionMatrix"); 782 uint32_t a = 0x00010000; 783 uint32_t b = 0; 784 uint32_t c = 0; 785 uint32_t d = 0x00010000; 786 switch (degrees) { 787 case 0: 788 break; 789 case 90: 790 a = 0; 791 b = 0x00010000; 792 c = 0xFFFF0000; 793 d = 0; 794 break; 795 case 180: 796 a = 0xFFFF0000; 797 d = 0xFFFF0000; 798 break; 799 case 270: 800 a = 0; 801 b = 0xFFFF0000; 802 c = 0x00010000; 803 d = 0; 804 break; 805 default: 806 CHECK(!"Should never reach this unknown rotation"); 807 break; 808 } 809 810 writeInt32(a); // a 811 writeInt32(b); // b 812 writeInt32(0); // u 813 writeInt32(c); // c 814 writeInt32(d); // d 815 writeInt32(0); // v 816 writeInt32(0); // x 817 writeInt32(0); // y 818 writeInt32(0x40000000); // w 819} 820 821void MPEG4Writer::release() { 822 close(mFd); 823 mFd = -1; 824 mInitCheck = NO_INIT; 825 mStarted = false; 826 free(mMoovBoxBuffer); 827 mMoovBoxBuffer = NULL; 828} 829 830status_t MPEG4Writer::reset() { 831 if (mInitCheck != OK) { 832 return OK; 833 } else { 834 if (!mWriterThreadStarted || 835 !mStarted) { 836 if (mWriterThreadStarted) { 837 stopWriterThread(); 838 } 839 release(); 840 return OK; 841 } 842 } 843 844 status_t err = OK; 845 int64_t maxDurationUs = 0; 846 int64_t minDurationUs = 0x7fffffffffffffffLL; 847 for (List<Track *>::iterator it = mTracks.begin(); 848 it != mTracks.end(); ++it) { 849 status_t status = (*it)->stop(); 850 if (err == OK && status != OK) { 851 err = status; 852 } 853 854 int64_t durationUs = (*it)->getDurationUs(); 855 if (durationUs > maxDurationUs) { 856 maxDurationUs = durationUs; 857 } 858 if (durationUs < minDurationUs) { 859 minDurationUs = durationUs; 860 } 861 } 862 863 if (mTracks.size() > 1) { 864 ALOGD("Duration from tracks range is [%" PRId64 ", %" PRId64 "] us", 865 minDurationUs, maxDurationUs); 866 } 867 868 stopWriterThread(); 869 870 // Do not write out movie header on error. 871 if (err != OK) { 872 release(); 873 return err; 874 } 875 876 // Fix up the size of the 'mdat' chunk. 877 if (mUse32BitOffset) { 878 lseek64(mFd, mMdatOffset, SEEK_SET); 879 uint32_t size = htonl(static_cast<uint32_t>(mOffset - mMdatOffset)); 880 ::write(mFd, &size, 4); 881 } else { 882 lseek64(mFd, mMdatOffset + 8, SEEK_SET); 883 uint64_t size = mOffset - mMdatOffset; 884 size = hton64(size); 885 ::write(mFd, &size, 8); 886 } 887 lseek64(mFd, mOffset, SEEK_SET); 888 889 // Construct moov box now 890 mMoovBoxBufferOffset = 0; 891 mWriteMoovBoxToMemory = mStreamableFile; 892 if (mWriteMoovBoxToMemory) { 893 // There is no need to allocate in-memory cache 894 // for moov box if the file is not streamable. 895 896 mMoovBoxBuffer = (uint8_t *) malloc(mEstimatedMoovBoxSize); 897 CHECK(mMoovBoxBuffer != NULL); 898 } 899 writeMoovBox(maxDurationUs); 900 901 // mWriteMoovBoxToMemory could be set to false in 902 // MPEG4Writer::write() method 903 if (mWriteMoovBoxToMemory) { 904 mWriteMoovBoxToMemory = false; 905 // Content of the moov box is saved in the cache, and the in-memory 906 // moov box needs to be written to the file in a single shot. 907 908 CHECK_LE(mMoovBoxBufferOffset + 8, mEstimatedMoovBoxSize); 909 910 // Moov box 911 lseek64(mFd, mFreeBoxOffset, SEEK_SET); 912 mOffset = mFreeBoxOffset; 913 write(mMoovBoxBuffer, 1, mMoovBoxBufferOffset); 914 915 // Free box 916 lseek64(mFd, mOffset, SEEK_SET); 917 writeInt32(mEstimatedMoovBoxSize - mMoovBoxBufferOffset); 918 write("free", 4); 919 } else { 920 ALOGI("The mp4 file will not be streamable."); 921 } 922 923 // Free in-memory cache for moov box 924 if (mMoovBoxBuffer != NULL) { 925 free(mMoovBoxBuffer); 926 mMoovBoxBuffer = NULL; 927 mMoovBoxBufferOffset = 0; 928 } 929 930 CHECK(mBoxes.empty()); 931 932 release(); 933 return err; 934} 935 936uint32_t MPEG4Writer::getMpeg4Time() { 937 time_t now = time(NULL); 938 // MP4 file uses time counting seconds since midnight, Jan. 1, 1904 939 // while time function returns Unix epoch values which starts 940 // at 1970-01-01. Lets add the number of seconds between them 941 uint32_t mpeg4Time = now + (66 * 365 + 17) * (24 * 60 * 60); 942 return mpeg4Time; 943} 944 945void MPEG4Writer::writeMvhdBox(int64_t durationUs) { 946 uint32_t now = getMpeg4Time(); 947 beginBox("mvhd"); 948 writeInt32(0); // version=0, flags=0 949 writeInt32(now); // creation time 950 writeInt32(now); // modification time 951 writeInt32(mTimeScale); // mvhd timescale 952 int32_t duration = (durationUs * mTimeScale + 5E5) / 1E6; 953 writeInt32(duration); 954 writeInt32(0x10000); // rate: 1.0 955 writeInt16(0x100); // volume 956 writeInt16(0); // reserved 957 writeInt32(0); // reserved 958 writeInt32(0); // reserved 959 writeCompositionMatrix(0); // matrix 960 writeInt32(0); // predefined 961 writeInt32(0); // predefined 962 writeInt32(0); // predefined 963 writeInt32(0); // predefined 964 writeInt32(0); // predefined 965 writeInt32(0); // predefined 966 writeInt32(mTracks.size() + 1); // nextTrackID 967 endBox(); // mvhd 968} 969 970void MPEG4Writer::writeMoovBox(int64_t durationUs) { 971 beginBox("moov"); 972 writeMvhdBox(durationUs); 973 if (mAreGeoTagsAvailable) { 974 writeUdtaBox(); 975 } 976 int32_t id = 1; 977 for (List<Track *>::iterator it = mTracks.begin(); 978 it != mTracks.end(); ++it, ++id) { 979 (*it)->writeTrackHeader(mUse32BitOffset); 980 } 981 endBox(); // moov 982} 983 984void MPEG4Writer::writeFtypBox(MetaData *param) { 985 beginBox("ftyp"); 986 987 int32_t fileType; 988 if (param && param->findInt32(kKeyFileType, &fileType) && 989 fileType != OUTPUT_FORMAT_MPEG_4) { 990 writeFourcc("3gp4"); 991 writeInt32(0); 992 writeFourcc("isom"); 993 writeFourcc("3gp4"); 994 } else { 995 writeFourcc("mp42"); 996 writeInt32(0); 997 writeFourcc("isom"); 998 writeFourcc("mp42"); 999 } 1000 1001 endBox(); 1002} 1003 1004static bool isTestModeEnabled() { 1005#if (PROPERTY_VALUE_MAX < 5) 1006#error "PROPERTY_VALUE_MAX must be at least 5" 1007#endif 1008 1009 // Test mode is enabled only if rw.media.record.test system 1010 // property is enabled. 1011 char value[PROPERTY_VALUE_MAX]; 1012 if (property_get("rw.media.record.test", value, NULL) && 1013 (!strcasecmp(value, "true") || !strcasecmp(value, "1"))) { 1014 return true; 1015 } 1016 return false; 1017} 1018 1019void MPEG4Writer::sendSessionSummary() { 1020 // Send session summary only if test mode is enabled 1021 if (!isTestModeEnabled()) { 1022 return; 1023 } 1024 1025 for (List<ChunkInfo>::iterator it = mChunkInfos.begin(); 1026 it != mChunkInfos.end(); ++it) { 1027 int trackNum = it->mTrack->getTrackId() << 28; 1028 notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 1029 trackNum | MEDIA_RECORDER_TRACK_INTER_CHUNK_TIME_MS, 1030 it->mMaxInterChunkDurUs); 1031 } 1032} 1033 1034status_t MPEG4Writer::setInterleaveDuration(uint32_t durationUs) { 1035 mInterleaveDurationUs = durationUs; 1036 return OK; 1037} 1038 1039void MPEG4Writer::lock() { 1040 mLock.lock(); 1041} 1042 1043void MPEG4Writer::unlock() { 1044 mLock.unlock(); 1045} 1046 1047off64_t MPEG4Writer::addSample_l(MediaBuffer *buffer) { 1048 off64_t old_offset = mOffset; 1049 1050 ::write(mFd, 1051 (const uint8_t *)buffer->data() + buffer->range_offset(), 1052 buffer->range_length()); 1053 1054 mOffset += buffer->range_length(); 1055 1056 return old_offset; 1057} 1058 1059static void StripStartcode(MediaBuffer *buffer) { 1060 if (buffer->range_length() < 4) { 1061 return; 1062 } 1063 1064 const uint8_t *ptr = 1065 (const uint8_t *)buffer->data() + buffer->range_offset(); 1066 1067 if (!memcmp(ptr, "\x00\x00\x00\x01", 4)) { 1068 buffer->set_range( 1069 buffer->range_offset() + 4, buffer->range_length() - 4); 1070 } 1071} 1072 1073off64_t MPEG4Writer::addLengthPrefixedSample_l(MediaBuffer *buffer) { 1074 off64_t old_offset = mOffset; 1075 1076 size_t length = buffer->range_length(); 1077 1078 if (mUse4ByteNalLength) { 1079 uint8_t x = length >> 24; 1080 ::write(mFd, &x, 1); 1081 x = (length >> 16) & 0xff; 1082 ::write(mFd, &x, 1); 1083 x = (length >> 8) & 0xff; 1084 ::write(mFd, &x, 1); 1085 x = length & 0xff; 1086 ::write(mFd, &x, 1); 1087 1088 ::write(mFd, 1089 (const uint8_t *)buffer->data() + buffer->range_offset(), 1090 length); 1091 1092 mOffset += length + 4; 1093 } else { 1094 CHECK_LT(length, 65536); 1095 1096 uint8_t x = length >> 8; 1097 ::write(mFd, &x, 1); 1098 x = length & 0xff; 1099 ::write(mFd, &x, 1); 1100 ::write(mFd, (const uint8_t *)buffer->data() + buffer->range_offset(), length); 1101 mOffset += length + 2; 1102 } 1103 1104 return old_offset; 1105} 1106 1107size_t MPEG4Writer::write( 1108 const void *ptr, size_t size, size_t nmemb) { 1109 1110 const size_t bytes = size * nmemb; 1111 if (mWriteMoovBoxToMemory) { 1112 1113 off64_t moovBoxSize = 8 + mMoovBoxBufferOffset + bytes; 1114 if (moovBoxSize > mEstimatedMoovBoxSize) { 1115 // The reserved moov box at the beginning of the file 1116 // is not big enough. Moov box should be written to 1117 // the end of the file from now on, but not to the 1118 // in-memory cache. 1119 1120 // We write partial moov box that is in the memory to 1121 // the file first. 1122 for (List<off64_t>::iterator it = mBoxes.begin(); 1123 it != mBoxes.end(); ++it) { 1124 (*it) += mOffset; 1125 } 1126 lseek64(mFd, mOffset, SEEK_SET); 1127 ::write(mFd, mMoovBoxBuffer, mMoovBoxBufferOffset); 1128 ::write(mFd, ptr, bytes); 1129 mOffset += (bytes + mMoovBoxBufferOffset); 1130 1131 // All subsequent moov box content will be written 1132 // to the end of the file. 1133 mWriteMoovBoxToMemory = false; 1134 } else { 1135 memcpy(mMoovBoxBuffer + mMoovBoxBufferOffset, ptr, bytes); 1136 mMoovBoxBufferOffset += bytes; 1137 } 1138 } else { 1139 ::write(mFd, ptr, size * nmemb); 1140 mOffset += bytes; 1141 } 1142 return bytes; 1143} 1144 1145void MPEG4Writer::beginBox(const char *fourcc) { 1146 CHECK_EQ(strlen(fourcc), 4); 1147 1148 mBoxes.push_back(mWriteMoovBoxToMemory? 1149 mMoovBoxBufferOffset: mOffset); 1150 1151 writeInt32(0); 1152 writeFourcc(fourcc); 1153} 1154 1155void MPEG4Writer::endBox() { 1156 CHECK(!mBoxes.empty()); 1157 1158 off64_t offset = *--mBoxes.end(); 1159 mBoxes.erase(--mBoxes.end()); 1160 1161 if (mWriteMoovBoxToMemory) { 1162 int32_t x = htonl(mMoovBoxBufferOffset - offset); 1163 memcpy(mMoovBoxBuffer + offset, &x, 4); 1164 } else { 1165 lseek64(mFd, offset, SEEK_SET); 1166 writeInt32(mOffset - offset); 1167 mOffset -= 4; 1168 lseek64(mFd, mOffset, SEEK_SET); 1169 } 1170} 1171 1172void MPEG4Writer::writeInt8(int8_t x) { 1173 write(&x, 1, 1); 1174} 1175 1176void MPEG4Writer::writeInt16(int16_t x) { 1177 x = htons(x); 1178 write(&x, 1, 2); 1179} 1180 1181void MPEG4Writer::writeInt32(int32_t x) { 1182 x = htonl(x); 1183 write(&x, 1, 4); 1184} 1185 1186void MPEG4Writer::writeInt64(int64_t x) { 1187 x = hton64(x); 1188 write(&x, 1, 8); 1189} 1190 1191void MPEG4Writer::writeCString(const char *s) { 1192 size_t n = strlen(s); 1193 write(s, 1, n + 1); 1194} 1195 1196void MPEG4Writer::writeFourcc(const char *s) { 1197 CHECK_EQ(strlen(s), 4); 1198 write(s, 1, 4); 1199} 1200 1201 1202// Written in +/-DD.DDDD format 1203void MPEG4Writer::writeLatitude(int degreex10000) { 1204 bool isNegative = (degreex10000 < 0); 1205 char sign = isNegative? '-': '+'; 1206 1207 // Handle the whole part 1208 char str[9]; 1209 int wholePart = degreex10000 / 10000; 1210 if (wholePart == 0) { 1211 snprintf(str, 5, "%c%.2d.", sign, wholePart); 1212 } else { 1213 snprintf(str, 5, "%+.2d.", wholePart); 1214 } 1215 1216 // Handle the fractional part 1217 int fractionalPart = degreex10000 - (wholePart * 10000); 1218 if (fractionalPart < 0) { 1219 fractionalPart = -fractionalPart; 1220 } 1221 snprintf(&str[4], 5, "%.4d", fractionalPart); 1222 1223 // Do not write the null terminator 1224 write(str, 1, 8); 1225} 1226 1227// Written in +/- DDD.DDDD format 1228void MPEG4Writer::writeLongitude(int degreex10000) { 1229 bool isNegative = (degreex10000 < 0); 1230 char sign = isNegative? '-': '+'; 1231 1232 // Handle the whole part 1233 char str[10]; 1234 int wholePart = degreex10000 / 10000; 1235 if (wholePart == 0) { 1236 snprintf(str, 6, "%c%.3d.", sign, wholePart); 1237 } else { 1238 snprintf(str, 6, "%+.3d.", wholePart); 1239 } 1240 1241 // Handle the fractional part 1242 int fractionalPart = degreex10000 - (wholePart * 10000); 1243 if (fractionalPart < 0) { 1244 fractionalPart = -fractionalPart; 1245 } 1246 snprintf(&str[5], 5, "%.4d", fractionalPart); 1247 1248 // Do not write the null terminator 1249 write(str, 1, 9); 1250} 1251 1252/* 1253 * Geodata is stored according to ISO-6709 standard. 1254 * latitudex10000 is latitude in degrees times 10000, and 1255 * longitudex10000 is longitude in degrees times 10000. 1256 * The range for the latitude is in [-90, +90], and 1257 * The range for the longitude is in [-180, +180] 1258 */ 1259status_t MPEG4Writer::setGeoData(int latitudex10000, int longitudex10000) { 1260 // Is latitude or longitude out of range? 1261 if (latitudex10000 < -900000 || latitudex10000 > 900000 || 1262 longitudex10000 < -1800000 || longitudex10000 > 1800000) { 1263 return BAD_VALUE; 1264 } 1265 1266 mLatitudex10000 = latitudex10000; 1267 mLongitudex10000 = longitudex10000; 1268 mAreGeoTagsAvailable = true; 1269 return OK; 1270} 1271 1272void MPEG4Writer::write(const void *data, size_t size) { 1273 write(data, 1, size); 1274} 1275 1276bool MPEG4Writer::isFileStreamable() const { 1277 return mStreamableFile; 1278} 1279 1280bool MPEG4Writer::exceedsFileSizeLimit() { 1281 // No limit 1282 if (mMaxFileSizeLimitBytes == 0) { 1283 return false; 1284 } 1285 1286 int64_t nTotalBytesEstimate = static_cast<int64_t>(mEstimatedMoovBoxSize); 1287 for (List<Track *>::iterator it = mTracks.begin(); 1288 it != mTracks.end(); ++it) { 1289 nTotalBytesEstimate += (*it)->getEstimatedTrackSizeBytes(); 1290 } 1291 1292 if (!mStreamableFile) { 1293 // Add 1024 bytes as error tolerance 1294 return nTotalBytesEstimate + 1024 >= mMaxFileSizeLimitBytes; 1295 } 1296 // Be conservative in the estimate: do not exceed 95% of 1297 // the target file limit. For small target file size limit, though, 1298 // this will not help. 1299 return (nTotalBytesEstimate >= (95 * mMaxFileSizeLimitBytes) / 100); 1300} 1301 1302bool MPEG4Writer::exceedsFileDurationLimit() { 1303 // No limit 1304 if (mMaxFileDurationLimitUs == 0) { 1305 return false; 1306 } 1307 1308 for (List<Track *>::iterator it = mTracks.begin(); 1309 it != mTracks.end(); ++it) { 1310 if ((*it)->getDurationUs() >= mMaxFileDurationLimitUs) { 1311 return true; 1312 } 1313 } 1314 return false; 1315} 1316 1317bool MPEG4Writer::reachedEOS() { 1318 bool allDone = true; 1319 for (List<Track *>::iterator it = mTracks.begin(); 1320 it != mTracks.end(); ++it) { 1321 if (!(*it)->reachedEOS()) { 1322 allDone = false; 1323 break; 1324 } 1325 } 1326 1327 return allDone; 1328} 1329 1330void MPEG4Writer::setStartTimestampUs(int64_t timeUs) { 1331 ALOGI("setStartTimestampUs: %" PRId64, timeUs); 1332 CHECK_GE(timeUs, 0ll); 1333 Mutex::Autolock autoLock(mLock); 1334 if (mStartTimestampUs < 0 || mStartTimestampUs > timeUs) { 1335 mStartTimestampUs = timeUs; 1336 ALOGI("Earliest track starting time: %" PRId64, mStartTimestampUs); 1337 } 1338} 1339 1340int64_t MPEG4Writer::getStartTimestampUs() { 1341 Mutex::Autolock autoLock(mLock); 1342 return mStartTimestampUs; 1343} 1344 1345size_t MPEG4Writer::numTracks() { 1346 Mutex::Autolock autolock(mLock); 1347 return mTracks.size(); 1348} 1349 1350//////////////////////////////////////////////////////////////////////////////// 1351 1352MPEG4Writer::Track::Track( 1353 MPEG4Writer *owner, const sp<MediaSource> &source, size_t trackId) 1354 : mOwner(owner), 1355 mMeta(source->getFormat()), 1356 mSource(source), 1357 mDone(false), 1358 mPaused(false), 1359 mResumed(false), 1360 mStarted(false), 1361 mTrackId(trackId), 1362 mTrackDurationUs(0), 1363 mEstimatedTrackSizeBytes(0), 1364 mSamplesHaveSameSize(true), 1365 mStszTableEntries(new ListTableEntries<uint32_t>(1000, 1)), 1366 mStcoTableEntries(new ListTableEntries<uint32_t>(1000, 1)), 1367 mCo64TableEntries(new ListTableEntries<off64_t>(1000, 1)), 1368 mStscTableEntries(new ListTableEntries<uint32_t>(1000, 3)), 1369 mStssTableEntries(new ListTableEntries<uint32_t>(1000, 1)), 1370 mSttsTableEntries(new ListTableEntries<uint32_t>(1000, 2)), 1371 mCttsTableEntries(new ListTableEntries<uint32_t>(1000, 2)), 1372 mCodecSpecificData(NULL), 1373 mCodecSpecificDataSize(0), 1374 mGotAllCodecSpecificData(false), 1375 mReachedEOS(false), 1376 mRotation(0) { 1377 getCodecSpecificDataFromInputFormatIfPossible(); 1378 1379 const char *mime; 1380 mMeta->findCString(kKeyMIMEType, &mime); 1381 mIsAvc = !strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_AVC); 1382 mIsAudio = !strncasecmp(mime, "audio/", 6); 1383 mIsMPEG4 = !strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_MPEG4) || 1384 !strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_AAC); 1385 1386 setTimeScale(); 1387} 1388 1389void MPEG4Writer::Track::updateTrackSizeEstimate() { 1390 1391 uint32_t stcoBoxCount = (mOwner->use32BitFileOffset() 1392 ? mStcoTableEntries->count() 1393 : mCo64TableEntries->count()); 1394 int64_t stcoBoxSizeBytes = stcoBoxCount * 4; 1395 int64_t stszBoxSizeBytes = mSamplesHaveSameSize? 4: (mStszTableEntries->count() * 4); 1396 1397 mEstimatedTrackSizeBytes = mMdatSizeBytes; // media data size 1398 if (!mOwner->isFileStreamable()) { 1399 // Reserved free space is not large enough to hold 1400 // all meta data and thus wasted. 1401 mEstimatedTrackSizeBytes += mStscTableEntries->count() * 12 + // stsc box size 1402 mStssTableEntries->count() * 4 + // stss box size 1403 mSttsTableEntries->count() * 8 + // stts box size 1404 mCttsTableEntries->count() * 8 + // ctts box size 1405 stcoBoxSizeBytes + // stco box size 1406 stszBoxSizeBytes; // stsz box size 1407 } 1408} 1409 1410void MPEG4Writer::Track::addOneStscTableEntry( 1411 size_t chunkId, size_t sampleId) { 1412 1413 mStscTableEntries->add(htonl(chunkId)); 1414 mStscTableEntries->add(htonl(sampleId)); 1415 mStscTableEntries->add(htonl(1)); 1416} 1417 1418void MPEG4Writer::Track::addOneStssTableEntry(size_t sampleId) { 1419 mStssTableEntries->add(htonl(sampleId)); 1420} 1421 1422void MPEG4Writer::Track::addOneSttsTableEntry( 1423 size_t sampleCount, int32_t duration) { 1424 1425 if (duration == 0) { 1426 ALOGW("0-duration samples found: %zu", sampleCount); 1427 } 1428 mSttsTableEntries->add(htonl(sampleCount)); 1429 mSttsTableEntries->add(htonl(duration)); 1430} 1431 1432void MPEG4Writer::Track::addOneCttsTableEntry( 1433 size_t sampleCount, int32_t duration) { 1434 1435 if (mIsAudio) { 1436 return; 1437 } 1438 mCttsTableEntries->add(htonl(sampleCount)); 1439 mCttsTableEntries->add(htonl(duration)); 1440} 1441 1442void MPEG4Writer::Track::addChunkOffset(off64_t offset) { 1443 if (mOwner->use32BitFileOffset()) { 1444 uint32_t value = offset; 1445 mStcoTableEntries->add(htonl(value)); 1446 } else { 1447 mCo64TableEntries->add(hton64(offset)); 1448 } 1449} 1450 1451void MPEG4Writer::Track::setTimeScale() { 1452 ALOGV("setTimeScale"); 1453 // Default time scale 1454 mTimeScale = 90000; 1455 1456 if (mIsAudio) { 1457 // Use the sampling rate as the default time scale for audio track. 1458 int32_t sampleRate; 1459 bool success = mMeta->findInt32(kKeySampleRate, &sampleRate); 1460 CHECK(success); 1461 mTimeScale = sampleRate; 1462 } 1463 1464 // If someone would like to overwrite the timescale, use user-supplied value. 1465 int32_t timeScale; 1466 if (mMeta->findInt32(kKeyTimeScale, &timeScale)) { 1467 mTimeScale = timeScale; 1468 } 1469 1470 CHECK_GT(mTimeScale, 0); 1471} 1472 1473void MPEG4Writer::Track::getCodecSpecificDataFromInputFormatIfPossible() { 1474 const char *mime; 1475 CHECK(mMeta->findCString(kKeyMIMEType, &mime)); 1476 1477 if (!strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_AVC)) { 1478 uint32_t type; 1479 const void *data; 1480 size_t size; 1481 if (mMeta->findData(kKeyAVCC, &type, &data, &size)) { 1482 mCodecSpecificData = malloc(size); 1483 mCodecSpecificDataSize = size; 1484 memcpy(mCodecSpecificData, data, size); 1485 mGotAllCodecSpecificData = true; 1486 } 1487 } else if (!strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_MPEG4) 1488 || !strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_AAC)) { 1489 uint32_t type; 1490 const void *data; 1491 size_t size; 1492 if (mMeta->findData(kKeyESDS, &type, &data, &size)) { 1493 ESDS esds(data, size); 1494 if (esds.getCodecSpecificInfo(&data, &size) == OK) { 1495 mCodecSpecificData = malloc(size); 1496 mCodecSpecificDataSize = size; 1497 memcpy(mCodecSpecificData, data, size); 1498 mGotAllCodecSpecificData = true; 1499 } 1500 } 1501 } 1502} 1503 1504MPEG4Writer::Track::~Track() { 1505 stop(); 1506 1507 delete mStszTableEntries; 1508 delete mStcoTableEntries; 1509 delete mCo64TableEntries; 1510 delete mStscTableEntries; 1511 delete mSttsTableEntries; 1512 delete mStssTableEntries; 1513 delete mCttsTableEntries; 1514 1515 mStszTableEntries = NULL; 1516 mStcoTableEntries = NULL; 1517 mCo64TableEntries = NULL; 1518 mStscTableEntries = NULL; 1519 mSttsTableEntries = NULL; 1520 mStssTableEntries = NULL; 1521 mCttsTableEntries = NULL; 1522 1523 if (mCodecSpecificData != NULL) { 1524 free(mCodecSpecificData); 1525 mCodecSpecificData = NULL; 1526 } 1527} 1528 1529void MPEG4Writer::Track::initTrackingProgressStatus(MetaData *params) { 1530 ALOGV("initTrackingProgressStatus"); 1531 mPreviousTrackTimeUs = -1; 1532 mTrackingProgressStatus = false; 1533 mTrackEveryTimeDurationUs = 0; 1534 { 1535 int64_t timeUs; 1536 if (params && params->findInt64(kKeyTrackTimeStatus, &timeUs)) { 1537 ALOGV("Receive request to track progress status for every %" PRId64 " us", timeUs); 1538 mTrackEveryTimeDurationUs = timeUs; 1539 mTrackingProgressStatus = true; 1540 } 1541 } 1542} 1543 1544// static 1545void *MPEG4Writer::ThreadWrapper(void *me) { 1546 ALOGV("ThreadWrapper: %p", me); 1547 MPEG4Writer *writer = static_cast<MPEG4Writer *>(me); 1548 writer->threadFunc(); 1549 return NULL; 1550} 1551 1552void MPEG4Writer::bufferChunk(const Chunk& chunk) { 1553 ALOGV("bufferChunk: %p", chunk.mTrack); 1554 Mutex::Autolock autolock(mLock); 1555 CHECK_EQ(mDone, false); 1556 1557 for (List<ChunkInfo>::iterator it = mChunkInfos.begin(); 1558 it != mChunkInfos.end(); ++it) { 1559 1560 if (chunk.mTrack == it->mTrack) { // Found owner 1561 it->mChunks.push_back(chunk); 1562 mChunkReadyCondition.signal(); 1563 return; 1564 } 1565 } 1566 1567 CHECK(!"Received a chunk for a unknown track"); 1568} 1569 1570void MPEG4Writer::writeChunkToFile(Chunk* chunk) { 1571 ALOGV("writeChunkToFile: %" PRId64 " from %s track", 1572 chunk->mTimeStampUs, chunk->mTrack->isAudio()? "audio": "video"); 1573 1574 int32_t isFirstSample = true; 1575 while (!chunk->mSamples.empty()) { 1576 List<MediaBuffer *>::iterator it = chunk->mSamples.begin(); 1577 1578 off64_t offset = chunk->mTrack->isAvc() 1579 ? addLengthPrefixedSample_l(*it) 1580 : addSample_l(*it); 1581 1582 if (isFirstSample) { 1583 chunk->mTrack->addChunkOffset(offset); 1584 isFirstSample = false; 1585 } 1586 1587 (*it)->release(); 1588 (*it) = NULL; 1589 chunk->mSamples.erase(it); 1590 } 1591 chunk->mSamples.clear(); 1592} 1593 1594void MPEG4Writer::writeAllChunks() { 1595 ALOGV("writeAllChunks"); 1596 size_t outstandingChunks = 0; 1597 Chunk chunk; 1598 while (findChunkToWrite(&chunk)) { 1599 writeChunkToFile(&chunk); 1600 ++outstandingChunks; 1601 } 1602 1603 sendSessionSummary(); 1604 1605 mChunkInfos.clear(); 1606 ALOGD("%zu chunks are written in the last batch", outstandingChunks); 1607} 1608 1609bool MPEG4Writer::findChunkToWrite(Chunk *chunk) { 1610 ALOGV("findChunkToWrite"); 1611 1612 int64_t minTimestampUs = 0x7FFFFFFFFFFFFFFFLL; 1613 Track *track = NULL; 1614 for (List<ChunkInfo>::iterator it = mChunkInfos.begin(); 1615 it != mChunkInfos.end(); ++it) { 1616 if (!it->mChunks.empty()) { 1617 List<Chunk>::iterator chunkIt = it->mChunks.begin(); 1618 if (chunkIt->mTimeStampUs < minTimestampUs) { 1619 minTimestampUs = chunkIt->mTimeStampUs; 1620 track = it->mTrack; 1621 } 1622 } 1623 } 1624 1625 if (track == NULL) { 1626 ALOGV("Nothing to be written after all"); 1627 return false; 1628 } 1629 1630 if (mIsFirstChunk) { 1631 mIsFirstChunk = false; 1632 } 1633 1634 for (List<ChunkInfo>::iterator it = mChunkInfos.begin(); 1635 it != mChunkInfos.end(); ++it) { 1636 if (it->mTrack == track) { 1637 *chunk = *(it->mChunks.begin()); 1638 it->mChunks.erase(it->mChunks.begin()); 1639 CHECK_EQ(chunk->mTrack, track); 1640 1641 int64_t interChunkTimeUs = 1642 chunk->mTimeStampUs - it->mPrevChunkTimestampUs; 1643 if (interChunkTimeUs > it->mPrevChunkTimestampUs) { 1644 it->mMaxInterChunkDurUs = interChunkTimeUs; 1645 } 1646 1647 return true; 1648 } 1649 } 1650 1651 return false; 1652} 1653 1654void MPEG4Writer::threadFunc() { 1655 ALOGV("threadFunc"); 1656 1657 prctl(PR_SET_NAME, (unsigned long)"MPEG4Writer", 0, 0, 0); 1658 1659 Mutex::Autolock autoLock(mLock); 1660 while (!mDone) { 1661 Chunk chunk; 1662 bool chunkFound = false; 1663 1664 while (!mDone && !(chunkFound = findChunkToWrite(&chunk))) { 1665 mChunkReadyCondition.wait(mLock); 1666 } 1667 1668 // In real time recording mode, write without holding the lock in order 1669 // to reduce the blocking time for media track threads. 1670 // Otherwise, hold the lock until the existing chunks get written to the 1671 // file. 1672 if (chunkFound) { 1673 if (mIsRealTimeRecording) { 1674 mLock.unlock(); 1675 } 1676 writeChunkToFile(&chunk); 1677 if (mIsRealTimeRecording) { 1678 mLock.lock(); 1679 } 1680 } 1681 } 1682 1683 writeAllChunks(); 1684} 1685 1686status_t MPEG4Writer::startWriterThread() { 1687 ALOGV("startWriterThread"); 1688 1689 mDone = false; 1690 mIsFirstChunk = true; 1691 mDriftTimeUs = 0; 1692 for (List<Track *>::iterator it = mTracks.begin(); 1693 it != mTracks.end(); ++it) { 1694 ChunkInfo info; 1695 info.mTrack = *it; 1696 info.mPrevChunkTimestampUs = 0; 1697 info.mMaxInterChunkDurUs = 0; 1698 mChunkInfos.push_back(info); 1699 } 1700 1701 pthread_attr_t attr; 1702 pthread_attr_init(&attr); 1703 pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE); 1704 pthread_create(&mThread, &attr, ThreadWrapper, this); 1705 pthread_attr_destroy(&attr); 1706 mWriterThreadStarted = true; 1707 return OK; 1708} 1709 1710 1711status_t MPEG4Writer::Track::start(MetaData *params) { 1712 if (!mDone && mPaused) { 1713 mPaused = false; 1714 mResumed = true; 1715 return OK; 1716 } 1717 1718 int64_t startTimeUs; 1719 if (params == NULL || !params->findInt64(kKeyTime, &startTimeUs)) { 1720 startTimeUs = 0; 1721 } 1722 mStartTimeRealUs = startTimeUs; 1723 1724 int32_t rotationDegrees; 1725 if (!mIsAudio && params && params->findInt32(kKeyRotation, &rotationDegrees)) { 1726 mRotation = rotationDegrees; 1727 } 1728 1729 initTrackingProgressStatus(params); 1730 1731 sp<MetaData> meta = new MetaData; 1732 if (mOwner->isRealTimeRecording() && mOwner->numTracks() > 1) { 1733 /* 1734 * This extra delay of accepting incoming audio/video signals 1735 * helps to align a/v start time at the beginning of a recording 1736 * session, and it also helps eliminate the "recording" sound for 1737 * camcorder applications. 1738 * 1739 * If client does not set the start time offset, we fall back to 1740 * use the default initial delay value. 1741 */ 1742 int64_t startTimeOffsetUs = mOwner->getStartTimeOffsetMs() * 1000LL; 1743 if (startTimeOffsetUs < 0) { // Start time offset was not set 1744 startTimeOffsetUs = kInitialDelayTimeUs; 1745 } 1746 startTimeUs += startTimeOffsetUs; 1747 ALOGI("Start time offset: %" PRId64 " us", startTimeOffsetUs); 1748 } 1749 1750 meta->setInt64(kKeyTime, startTimeUs); 1751 1752 status_t err = mSource->start(meta.get()); 1753 if (err != OK) { 1754 mDone = mReachedEOS = true; 1755 return err; 1756 } 1757 1758 pthread_attr_t attr; 1759 pthread_attr_init(&attr); 1760 pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE); 1761 1762 mDone = false; 1763 mStarted = true; 1764 mTrackDurationUs = 0; 1765 mReachedEOS = false; 1766 mEstimatedTrackSizeBytes = 0; 1767 mMdatSizeBytes = 0; 1768 mMaxChunkDurationUs = 0; 1769 1770 pthread_create(&mThread, &attr, ThreadWrapper, this); 1771 pthread_attr_destroy(&attr); 1772 1773 return OK; 1774} 1775 1776status_t MPEG4Writer::Track::pause() { 1777 mPaused = true; 1778 return OK; 1779} 1780 1781status_t MPEG4Writer::Track::stop() { 1782 ALOGD("%s track stopping", mIsAudio? "Audio": "Video"); 1783 if (!mStarted) { 1784 ALOGE("Stop() called but track is not started"); 1785 return ERROR_END_OF_STREAM; 1786 } 1787 1788 if (mDone) { 1789 return OK; 1790 } 1791 mDone = true; 1792 1793 ALOGD("%s track source stopping", mIsAudio? "Audio": "Video"); 1794 mSource->stop(); 1795 ALOGD("%s track source stopped", mIsAudio? "Audio": "Video"); 1796 1797 void *dummy; 1798 pthread_join(mThread, &dummy); 1799 status_t err = static_cast<status_t>(reinterpret_cast<uintptr_t>(dummy)); 1800 1801 ALOGD("%s track stopped", mIsAudio? "Audio": "Video"); 1802 return err; 1803} 1804 1805bool MPEG4Writer::Track::reachedEOS() { 1806 return mReachedEOS; 1807} 1808 1809// static 1810void *MPEG4Writer::Track::ThreadWrapper(void *me) { 1811 Track *track = static_cast<Track *>(me); 1812 1813 status_t err = track->threadEntry(); 1814 return (void *)(uintptr_t)err; 1815} 1816 1817static void getNalUnitType(uint8_t byte, uint8_t* type) { 1818 ALOGV("getNalUnitType: %d", byte); 1819 1820 // nal_unit_type: 5-bit unsigned integer 1821 *type = (byte & 0x1F); 1822} 1823 1824static const uint8_t *findNextStartCode( 1825 const uint8_t *data, size_t length) { 1826 1827 ALOGV("findNextStartCode: %p %zu", data, length); 1828 1829 size_t bytesLeft = length; 1830 while (bytesLeft > 4 && 1831 memcmp("\x00\x00\x00\x01", &data[length - bytesLeft], 4)) { 1832 --bytesLeft; 1833 } 1834 if (bytesLeft <= 4) { 1835 bytesLeft = 0; // Last parameter set 1836 } 1837 return &data[length - bytesLeft]; 1838} 1839 1840const uint8_t *MPEG4Writer::Track::parseParamSet( 1841 const uint8_t *data, size_t length, int type, size_t *paramSetLen) { 1842 1843 ALOGV("parseParamSet"); 1844 CHECK(type == kNalUnitTypeSeqParamSet || 1845 type == kNalUnitTypePicParamSet); 1846 1847 const uint8_t *nextStartCode = findNextStartCode(data, length); 1848 *paramSetLen = nextStartCode - data; 1849 if (*paramSetLen == 0) { 1850 ALOGE("Param set is malformed, since its length is 0"); 1851 return NULL; 1852 } 1853 1854 AVCParamSet paramSet(*paramSetLen, data); 1855 if (type == kNalUnitTypeSeqParamSet) { 1856 if (*paramSetLen < 4) { 1857 ALOGE("Seq parameter set malformed"); 1858 return NULL; 1859 } 1860 if (mSeqParamSets.empty()) { 1861 mProfileIdc = data[1]; 1862 mProfileCompatible = data[2]; 1863 mLevelIdc = data[3]; 1864 } else { 1865 if (mProfileIdc != data[1] || 1866 mProfileCompatible != data[2] || 1867 mLevelIdc != data[3]) { 1868 ALOGE("Inconsistent profile/level found in seq parameter sets"); 1869 return NULL; 1870 } 1871 } 1872 mSeqParamSets.push_back(paramSet); 1873 } else { 1874 mPicParamSets.push_back(paramSet); 1875 } 1876 return nextStartCode; 1877} 1878 1879status_t MPEG4Writer::Track::copyAVCCodecSpecificData( 1880 const uint8_t *data, size_t size) { 1881 ALOGV("copyAVCCodecSpecificData"); 1882 1883 // 2 bytes for each of the parameter set length field 1884 // plus the 7 bytes for the header 1885 if (size < 4 + 7) { 1886 ALOGE("Codec specific data length too short: %zu", size); 1887 return ERROR_MALFORMED; 1888 } 1889 1890 mCodecSpecificDataSize = size; 1891 mCodecSpecificData = malloc(size); 1892 memcpy(mCodecSpecificData, data, size); 1893 return OK; 1894} 1895 1896status_t MPEG4Writer::Track::parseAVCCodecSpecificData( 1897 const uint8_t *data, size_t size) { 1898 1899 ALOGV("parseAVCCodecSpecificData"); 1900 // Data starts with a start code. 1901 // SPS and PPS are separated with start codes. 1902 // Also, SPS must come before PPS 1903 uint8_t type = kNalUnitTypeSeqParamSet; 1904 bool gotSps = false; 1905 bool gotPps = false; 1906 const uint8_t *tmp = data; 1907 const uint8_t *nextStartCode = data; 1908 size_t bytesLeft = size; 1909 size_t paramSetLen = 0; 1910 mCodecSpecificDataSize = 0; 1911 while (bytesLeft > 4 && !memcmp("\x00\x00\x00\x01", tmp, 4)) { 1912 getNalUnitType(*(tmp + 4), &type); 1913 if (type == kNalUnitTypeSeqParamSet) { 1914 if (gotPps) { 1915 ALOGE("SPS must come before PPS"); 1916 return ERROR_MALFORMED; 1917 } 1918 if (!gotSps) { 1919 gotSps = true; 1920 } 1921 nextStartCode = parseParamSet(tmp + 4, bytesLeft - 4, type, ¶mSetLen); 1922 } else if (type == kNalUnitTypePicParamSet) { 1923 if (!gotSps) { 1924 ALOGE("SPS must come before PPS"); 1925 return ERROR_MALFORMED; 1926 } 1927 if (!gotPps) { 1928 gotPps = true; 1929 } 1930 nextStartCode = parseParamSet(tmp + 4, bytesLeft - 4, type, ¶mSetLen); 1931 } else { 1932 ALOGE("Only SPS and PPS Nal units are expected"); 1933 return ERROR_MALFORMED; 1934 } 1935 1936 if (nextStartCode == NULL) { 1937 return ERROR_MALFORMED; 1938 } 1939 1940 // Move on to find the next parameter set 1941 bytesLeft -= nextStartCode - tmp; 1942 tmp = nextStartCode; 1943 mCodecSpecificDataSize += (2 + paramSetLen); 1944 } 1945 1946 { 1947 // Check on the number of seq parameter sets 1948 size_t nSeqParamSets = mSeqParamSets.size(); 1949 if (nSeqParamSets == 0) { 1950 ALOGE("Cound not find sequence parameter set"); 1951 return ERROR_MALFORMED; 1952 } 1953 1954 if (nSeqParamSets > 0x1F) { 1955 ALOGE("Too many seq parameter sets (%zu) found", nSeqParamSets); 1956 return ERROR_MALFORMED; 1957 } 1958 } 1959 1960 { 1961 // Check on the number of pic parameter sets 1962 size_t nPicParamSets = mPicParamSets.size(); 1963 if (nPicParamSets == 0) { 1964 ALOGE("Cound not find picture parameter set"); 1965 return ERROR_MALFORMED; 1966 } 1967 if (nPicParamSets > 0xFF) { 1968 ALOGE("Too many pic parameter sets (%zd) found", nPicParamSets); 1969 return ERROR_MALFORMED; 1970 } 1971 } 1972// FIXME: 1973// Add chromat_format_idc, bit depth values, etc for AVC/h264 high profile and above 1974// and remove #if 0 1975#if 0 1976 { 1977 // Check on the profiles 1978 // These profiles requires additional parameter set extensions 1979 if (mProfileIdc == 100 || mProfileIdc == 110 || 1980 mProfileIdc == 122 || mProfileIdc == 144) { 1981 ALOGE("Sorry, no support for profile_idc: %d!", mProfileIdc); 1982 return BAD_VALUE; 1983 } 1984 } 1985#endif 1986 return OK; 1987} 1988 1989status_t MPEG4Writer::Track::makeAVCCodecSpecificData( 1990 const uint8_t *data, size_t size) { 1991 1992 if (mCodecSpecificData != NULL) { 1993 ALOGE("Already have codec specific data"); 1994 return ERROR_MALFORMED; 1995 } 1996 1997 if (size < 4) { 1998 ALOGE("Codec specific data length too short: %zu", size); 1999 return ERROR_MALFORMED; 2000 } 2001 2002 // Data is in the form of AVCCodecSpecificData 2003 if (memcmp("\x00\x00\x00\x01", data, 4)) { 2004 return copyAVCCodecSpecificData(data, size); 2005 } 2006 2007 if (parseAVCCodecSpecificData(data, size) != OK) { 2008 return ERROR_MALFORMED; 2009 } 2010 2011 // ISO 14496-15: AVC file format 2012 mCodecSpecificDataSize += 7; // 7 more bytes in the header 2013 mCodecSpecificData = malloc(mCodecSpecificDataSize); 2014 uint8_t *header = (uint8_t *)mCodecSpecificData; 2015 header[0] = 1; // version 2016 header[1] = mProfileIdc; // profile indication 2017 header[2] = mProfileCompatible; // profile compatibility 2018 header[3] = mLevelIdc; 2019 2020 // 6-bit '111111' followed by 2-bit to lengthSizeMinuusOne 2021 if (mOwner->useNalLengthFour()) { 2022 header[4] = 0xfc | 3; // length size == 4 bytes 2023 } else { 2024 header[4] = 0xfc | 1; // length size == 2 bytes 2025 } 2026 2027 // 3-bit '111' followed by 5-bit numSequenceParameterSets 2028 int nSequenceParamSets = mSeqParamSets.size(); 2029 header[5] = 0xe0 | nSequenceParamSets; 2030 header += 6; 2031 for (List<AVCParamSet>::iterator it = mSeqParamSets.begin(); 2032 it != mSeqParamSets.end(); ++it) { 2033 // 16-bit sequence parameter set length 2034 uint16_t seqParamSetLength = it->mLength; 2035 header[0] = seqParamSetLength >> 8; 2036 header[1] = seqParamSetLength & 0xff; 2037 2038 // SPS NAL unit (sequence parameter length bytes) 2039 memcpy(&header[2], it->mData, seqParamSetLength); 2040 header += (2 + seqParamSetLength); 2041 } 2042 2043 // 8-bit nPictureParameterSets 2044 int nPictureParamSets = mPicParamSets.size(); 2045 header[0] = nPictureParamSets; 2046 header += 1; 2047 for (List<AVCParamSet>::iterator it = mPicParamSets.begin(); 2048 it != mPicParamSets.end(); ++it) { 2049 // 16-bit picture parameter set length 2050 uint16_t picParamSetLength = it->mLength; 2051 header[0] = picParamSetLength >> 8; 2052 header[1] = picParamSetLength & 0xff; 2053 2054 // PPS Nal unit (picture parameter set length bytes) 2055 memcpy(&header[2], it->mData, picParamSetLength); 2056 header += (2 + picParamSetLength); 2057 } 2058 2059 return OK; 2060} 2061 2062/* 2063 * Updates the drift time from the audio track so that 2064 * the video track can get the updated drift time information 2065 * from the file writer. The fluctuation of the drift time of the audio 2066 * encoding path is smoothed out with a simple filter by giving a larger 2067 * weight to more recently drift time. The filter coefficients, 0.5 and 0.5, 2068 * are heuristically determined. 2069 */ 2070void MPEG4Writer::Track::updateDriftTime(const sp<MetaData>& meta) { 2071 int64_t driftTimeUs = 0; 2072 if (meta->findInt64(kKeyDriftTime, &driftTimeUs)) { 2073 int64_t prevDriftTimeUs = mOwner->getDriftTimeUs(); 2074 int64_t timeUs = (driftTimeUs + prevDriftTimeUs) >> 1; 2075 mOwner->setDriftTimeUs(timeUs); 2076 } 2077} 2078 2079status_t MPEG4Writer::Track::threadEntry() { 2080 int32_t count = 0; 2081 const int64_t interleaveDurationUs = mOwner->interleaveDuration(); 2082 const bool hasMultipleTracks = (mOwner->numTracks() > 1); 2083 int64_t chunkTimestampUs = 0; 2084 int32_t nChunks = 0; 2085 int32_t nZeroLengthFrames = 0; 2086 int64_t lastTimestampUs = 0; // Previous sample time stamp 2087 int64_t lastDurationUs = 0; // Between the previous two samples 2088 int64_t currDurationTicks = 0; // Timescale based ticks 2089 int64_t lastDurationTicks = 0; // Timescale based ticks 2090 int32_t sampleCount = 1; // Sample count in the current stts table entry 2091 uint32_t previousSampleSize = 0; // Size of the previous sample 2092 int64_t previousPausedDurationUs = 0; 2093 int64_t timestampUs = 0; 2094 int64_t cttsOffsetTimeUs = 0; 2095 int64_t currCttsOffsetTimeTicks = 0; // Timescale based ticks 2096 int64_t lastCttsOffsetTimeTicks = -1; // Timescale based ticks 2097 int32_t cttsSampleCount = 0; // Sample count in the current ctts table entry 2098 uint32_t lastSamplesPerChunk = 0; 2099 2100 if (mIsAudio) { 2101 prctl(PR_SET_NAME, (unsigned long)"AudioTrackEncoding", 0, 0, 0); 2102 } else { 2103 prctl(PR_SET_NAME, (unsigned long)"VideoTrackEncoding", 0, 0, 0); 2104 } 2105 2106 if (mOwner->isRealTimeRecording()) { 2107 androidSetThreadPriority(0, ANDROID_PRIORITY_AUDIO); 2108 } 2109 2110 sp<MetaData> meta_data; 2111 2112 status_t err = OK; 2113 MediaBuffer *buffer; 2114 const char *trackName = mIsAudio ? "Audio" : "Video"; 2115 while (!mDone && (err = mSource->read(&buffer)) == OK) { 2116 if (buffer->range_length() == 0) { 2117 buffer->release(); 2118 buffer = NULL; 2119 ++nZeroLengthFrames; 2120 continue; 2121 } 2122 2123 // If the codec specific data has not been received yet, delay pause. 2124 // After the codec specific data is received, discard what we received 2125 // when the track is to be paused. 2126 if (mPaused && !mResumed) { 2127 buffer->release(); 2128 buffer = NULL; 2129 continue; 2130 } 2131 2132 ++count; 2133 2134 int32_t isCodecConfig; 2135 if (buffer->meta_data()->findInt32(kKeyIsCodecConfig, &isCodecConfig) 2136 && isCodecConfig) { 2137 CHECK(!mGotAllCodecSpecificData); 2138 2139 if (mIsAvc) { 2140 status_t err = makeAVCCodecSpecificData( 2141 (const uint8_t *)buffer->data() 2142 + buffer->range_offset(), 2143 buffer->range_length()); 2144 CHECK_EQ((status_t)OK, err); 2145 } else if (mIsMPEG4) { 2146 mCodecSpecificDataSize = buffer->range_length(); 2147 mCodecSpecificData = malloc(mCodecSpecificDataSize); 2148 memcpy(mCodecSpecificData, 2149 (const uint8_t *)buffer->data() 2150 + buffer->range_offset(), 2151 buffer->range_length()); 2152 } 2153 2154 buffer->release(); 2155 buffer = NULL; 2156 2157 mGotAllCodecSpecificData = true; 2158 continue; 2159 } 2160 2161 // Make a deep copy of the MediaBuffer and Metadata and release 2162 // the original as soon as we can 2163 MediaBuffer *copy = new MediaBuffer(buffer->range_length()); 2164 memcpy(copy->data(), (uint8_t *)buffer->data() + buffer->range_offset(), 2165 buffer->range_length()); 2166 copy->set_range(0, buffer->range_length()); 2167 meta_data = new MetaData(*buffer->meta_data().get()); 2168 buffer->release(); 2169 buffer = NULL; 2170 2171 if (mIsAvc) StripStartcode(copy); 2172 2173 size_t sampleSize = copy->range_length(); 2174 if (mIsAvc) { 2175 if (mOwner->useNalLengthFour()) { 2176 sampleSize += 4; 2177 } else { 2178 sampleSize += 2; 2179 } 2180 } 2181 2182 // Max file size or duration handling 2183 mMdatSizeBytes += sampleSize; 2184 updateTrackSizeEstimate(); 2185 2186 if (mOwner->exceedsFileSizeLimit()) { 2187 mOwner->notify(MEDIA_RECORDER_EVENT_INFO, MEDIA_RECORDER_INFO_MAX_FILESIZE_REACHED, 0); 2188 break; 2189 } 2190 if (mOwner->exceedsFileDurationLimit()) { 2191 mOwner->notify(MEDIA_RECORDER_EVENT_INFO, MEDIA_RECORDER_INFO_MAX_DURATION_REACHED, 0); 2192 break; 2193 } 2194 2195 2196 int32_t isSync = false; 2197 meta_data->findInt32(kKeyIsSyncFrame, &isSync); 2198 CHECK(meta_data->findInt64(kKeyTime, ×tampUs)); 2199 2200//////////////////////////////////////////////////////////////////////////////// 2201 if (mStszTableEntries->count() == 0) { 2202 mFirstSampleTimeRealUs = systemTime() / 1000; 2203 mStartTimestampUs = timestampUs; 2204 mOwner->setStartTimestampUs(mStartTimestampUs); 2205 previousPausedDurationUs = mStartTimestampUs; 2206 } 2207 2208 if (mResumed) { 2209 int64_t durExcludingEarlierPausesUs = timestampUs - previousPausedDurationUs; 2210 if (WARN_UNLESS(durExcludingEarlierPausesUs >= 0ll, "for %s track", trackName)) { 2211 copy->release(); 2212 return ERROR_MALFORMED; 2213 } 2214 2215 int64_t pausedDurationUs = durExcludingEarlierPausesUs - mTrackDurationUs; 2216 if (WARN_UNLESS(pausedDurationUs >= lastDurationUs, "for %s track", trackName)) { 2217 copy->release(); 2218 return ERROR_MALFORMED; 2219 } 2220 2221 previousPausedDurationUs += pausedDurationUs - lastDurationUs; 2222 mResumed = false; 2223 } 2224 2225 timestampUs -= previousPausedDurationUs; 2226 if (WARN_UNLESS(timestampUs >= 0ll, "for %s track", trackName)) { 2227 copy->release(); 2228 return ERROR_MALFORMED; 2229 } 2230 2231 if (!mIsAudio) { 2232 /* 2233 * Composition time: timestampUs 2234 * Decoding time: decodingTimeUs 2235 * Composition time offset = composition time - decoding time 2236 */ 2237 int64_t decodingTimeUs; 2238 CHECK(meta_data->findInt64(kKeyDecodingTime, &decodingTimeUs)); 2239 decodingTimeUs -= previousPausedDurationUs; 2240 cttsOffsetTimeUs = 2241 timestampUs + kMaxCttsOffsetTimeUs - decodingTimeUs; 2242 if (WARN_UNLESS(cttsOffsetTimeUs >= 0ll, "for %s track", trackName)) { 2243 copy->release(); 2244 return ERROR_MALFORMED; 2245 } 2246 2247 timestampUs = decodingTimeUs; 2248 ALOGV("decoding time: %" PRId64 " and ctts offset time: %" PRId64, 2249 timestampUs, cttsOffsetTimeUs); 2250 2251 // Update ctts box table if necessary 2252 currCttsOffsetTimeTicks = 2253 (cttsOffsetTimeUs * mTimeScale + 500000LL) / 1000000LL; 2254 if (WARN_UNLESS(currCttsOffsetTimeTicks <= 0x0FFFFFFFFLL, "for %s track", trackName)) { 2255 copy->release(); 2256 return ERROR_MALFORMED; 2257 } 2258 2259 if (mStszTableEntries->count() == 0) { 2260 // Force the first ctts table entry to have one single entry 2261 // so that we can do adjustment for the initial track start 2262 // time offset easily in writeCttsBox(). 2263 lastCttsOffsetTimeTicks = currCttsOffsetTimeTicks; 2264 addOneCttsTableEntry(1, currCttsOffsetTimeTicks); 2265 cttsSampleCount = 0; // No sample in ctts box is pending 2266 } else { 2267 if (currCttsOffsetTimeTicks != lastCttsOffsetTimeTicks) { 2268 addOneCttsTableEntry(cttsSampleCount, lastCttsOffsetTimeTicks); 2269 lastCttsOffsetTimeTicks = currCttsOffsetTimeTicks; 2270 cttsSampleCount = 1; // One sample in ctts box is pending 2271 } else { 2272 ++cttsSampleCount; 2273 } 2274 } 2275 2276 // Update ctts time offset range 2277 if (mStszTableEntries->count() == 0) { 2278 mMinCttsOffsetTimeUs = currCttsOffsetTimeTicks; 2279 mMaxCttsOffsetTimeUs = currCttsOffsetTimeTicks; 2280 } else { 2281 if (currCttsOffsetTimeTicks > mMaxCttsOffsetTimeUs) { 2282 mMaxCttsOffsetTimeUs = currCttsOffsetTimeTicks; 2283 } else if (currCttsOffsetTimeTicks < mMinCttsOffsetTimeUs) { 2284 mMinCttsOffsetTimeUs = currCttsOffsetTimeTicks; 2285 } 2286 } 2287 2288 } 2289 2290 if (mOwner->isRealTimeRecording()) { 2291 if (mIsAudio) { 2292 updateDriftTime(meta_data); 2293 } 2294 } 2295 2296 if (WARN_UNLESS(timestampUs >= 0ll, "for %s track", trackName)) { 2297 copy->release(); 2298 return ERROR_MALFORMED; 2299 } 2300 2301 ALOGV("%s media time stamp: %" PRId64 " and previous paused duration %" PRId64, 2302 trackName, timestampUs, previousPausedDurationUs); 2303 if (timestampUs > mTrackDurationUs) { 2304 mTrackDurationUs = timestampUs; 2305 } 2306 2307 // We need to use the time scale based ticks, rather than the 2308 // timestamp itself to determine whether we have to use a new 2309 // stts entry, since we may have rounding errors. 2310 // The calculation is intended to reduce the accumulated 2311 // rounding errors. 2312 currDurationTicks = 2313 ((timestampUs * mTimeScale + 500000LL) / 1000000LL - 2314 (lastTimestampUs * mTimeScale + 500000LL) / 1000000LL); 2315 if (currDurationTicks < 0ll) { 2316 ALOGE("timestampUs %" PRId64 " < lastTimestampUs %" PRId64 " for %s track", 2317 timestampUs, lastTimestampUs, trackName); 2318 copy->release(); 2319 return UNKNOWN_ERROR; 2320 } 2321 2322 // if the duration is different for this sample, see if it is close enough to the previous 2323 // duration that we can fudge it and use the same value, to avoid filling the stts table 2324 // with lots of near-identical entries. 2325 // "close enough" here means that the current duration needs to be adjusted by less 2326 // than 0.1 milliseconds 2327 if (lastDurationTicks && (currDurationTicks != lastDurationTicks)) { 2328 int64_t deltaUs = ((lastDurationTicks - currDurationTicks) * 1000000LL 2329 + (mTimeScale / 2)) / mTimeScale; 2330 if (deltaUs > -100 && deltaUs < 100) { 2331 // use previous ticks, and adjust timestamp as if it was actually that number 2332 // of ticks 2333 currDurationTicks = lastDurationTicks; 2334 timestampUs += deltaUs; 2335 } 2336 } 2337 2338 mStszTableEntries->add(htonl(sampleSize)); 2339 if (mStszTableEntries->count() > 2) { 2340 2341 // Force the first sample to have its own stts entry so that 2342 // we can adjust its value later to maintain the A/V sync. 2343 if (mStszTableEntries->count() == 3 || currDurationTicks != lastDurationTicks) { 2344 addOneSttsTableEntry(sampleCount, lastDurationTicks); 2345 sampleCount = 1; 2346 } else { 2347 ++sampleCount; 2348 } 2349 2350 } 2351 if (mSamplesHaveSameSize) { 2352 if (mStszTableEntries->count() >= 2 && previousSampleSize != sampleSize) { 2353 mSamplesHaveSameSize = false; 2354 } 2355 previousSampleSize = sampleSize; 2356 } 2357 ALOGV("%s timestampUs/lastTimestampUs: %" PRId64 "/%" PRId64, 2358 trackName, timestampUs, lastTimestampUs); 2359 lastDurationUs = timestampUs - lastTimestampUs; 2360 lastDurationTicks = currDurationTicks; 2361 lastTimestampUs = timestampUs; 2362 2363 if (isSync != 0) { 2364 addOneStssTableEntry(mStszTableEntries->count()); 2365 } 2366 2367 if (mTrackingProgressStatus) { 2368 if (mPreviousTrackTimeUs <= 0) { 2369 mPreviousTrackTimeUs = mStartTimestampUs; 2370 } 2371 trackProgressStatus(timestampUs); 2372 } 2373 if (!hasMultipleTracks) { 2374 off64_t offset = mIsAvc? mOwner->addLengthPrefixedSample_l(copy) 2375 : mOwner->addSample_l(copy); 2376 2377 uint32_t count = (mOwner->use32BitFileOffset() 2378 ? mStcoTableEntries->count() 2379 : mCo64TableEntries->count()); 2380 2381 if (count == 0) { 2382 addChunkOffset(offset); 2383 } 2384 copy->release(); 2385 copy = NULL; 2386 continue; 2387 } 2388 2389 mChunkSamples.push_back(copy); 2390 if (interleaveDurationUs == 0) { 2391 addOneStscTableEntry(++nChunks, 1); 2392 bufferChunk(timestampUs); 2393 } else { 2394 if (chunkTimestampUs == 0) { 2395 chunkTimestampUs = timestampUs; 2396 } else { 2397 int64_t chunkDurationUs = timestampUs - chunkTimestampUs; 2398 if (chunkDurationUs > interleaveDurationUs) { 2399 if (chunkDurationUs > mMaxChunkDurationUs) { 2400 mMaxChunkDurationUs = chunkDurationUs; 2401 } 2402 ++nChunks; 2403 if (nChunks == 1 || // First chunk 2404 lastSamplesPerChunk != mChunkSamples.size()) { 2405 lastSamplesPerChunk = mChunkSamples.size(); 2406 addOneStscTableEntry(nChunks, lastSamplesPerChunk); 2407 } 2408 bufferChunk(timestampUs); 2409 chunkTimestampUs = timestampUs; 2410 } 2411 } 2412 } 2413 2414 } 2415 2416 if (isTrackMalFormed()) { 2417 err = ERROR_MALFORMED; 2418 } 2419 2420 mOwner->trackProgressStatus(mTrackId, -1, err); 2421 2422 // Last chunk 2423 if (!hasMultipleTracks) { 2424 addOneStscTableEntry(1, mStszTableEntries->count()); 2425 } else if (!mChunkSamples.empty()) { 2426 addOneStscTableEntry(++nChunks, mChunkSamples.size()); 2427 bufferChunk(timestampUs); 2428 } 2429 2430 // We don't really know how long the last frame lasts, since 2431 // there is no frame time after it, just repeat the previous 2432 // frame's duration. 2433 if (mStszTableEntries->count() == 1) { 2434 lastDurationUs = 0; // A single sample's duration 2435 lastDurationTicks = 0; 2436 } else { 2437 ++sampleCount; // Count for the last sample 2438 } 2439 2440 if (mStszTableEntries->count() <= 2) { 2441 addOneSttsTableEntry(1, lastDurationTicks); 2442 if (sampleCount - 1 > 0) { 2443 addOneSttsTableEntry(sampleCount - 1, lastDurationTicks); 2444 } 2445 } else { 2446 addOneSttsTableEntry(sampleCount, lastDurationTicks); 2447 } 2448 2449 // The last ctts box may not have been written yet, and this 2450 // is to make sure that we write out the last ctts box. 2451 if (currCttsOffsetTimeTicks == lastCttsOffsetTimeTicks) { 2452 if (cttsSampleCount > 0) { 2453 addOneCttsTableEntry(cttsSampleCount, lastCttsOffsetTimeTicks); 2454 } 2455 } 2456 2457 mTrackDurationUs += lastDurationUs; 2458 mReachedEOS = true; 2459 2460 sendTrackSummary(hasMultipleTracks); 2461 2462 ALOGI("Received total/0-length (%d/%d) buffers and encoded %d frames. - %s", 2463 count, nZeroLengthFrames, mStszTableEntries->count(), trackName); 2464 if (mIsAudio) { 2465 ALOGI("Audio track drift time: %" PRId64 " us", mOwner->getDriftTimeUs()); 2466 } 2467 2468 if (err == ERROR_END_OF_STREAM) { 2469 return OK; 2470 } 2471 return err; 2472} 2473 2474bool MPEG4Writer::Track::isTrackMalFormed() const { 2475 if (mStszTableEntries->count() == 0) { // no samples written 2476 ALOGE("The number of recorded samples is 0"); 2477 return true; 2478 } 2479 2480 if (!mIsAudio && mStssTableEntries->count() == 0) { // no sync frames for video 2481 ALOGE("There are no sync frames for video track"); 2482 return true; 2483 } 2484 2485 if (OK != checkCodecSpecificData()) { // no codec specific data 2486 return true; 2487 } 2488 2489 return false; 2490} 2491 2492void MPEG4Writer::Track::sendTrackSummary(bool hasMultipleTracks) { 2493 2494 // Send track summary only if test mode is enabled. 2495 if (!isTestModeEnabled()) { 2496 return; 2497 } 2498 2499 int trackNum = (mTrackId << 28); 2500 2501 mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2502 trackNum | MEDIA_RECORDER_TRACK_INFO_TYPE, 2503 mIsAudio? 0: 1); 2504 2505 mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2506 trackNum | MEDIA_RECORDER_TRACK_INFO_DURATION_MS, 2507 mTrackDurationUs / 1000); 2508 2509 mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2510 trackNum | MEDIA_RECORDER_TRACK_INFO_ENCODED_FRAMES, 2511 mStszTableEntries->count()); 2512 2513 { 2514 // The system delay time excluding the requested initial delay that 2515 // is used to eliminate the recording sound. 2516 int64_t startTimeOffsetUs = mOwner->getStartTimeOffsetMs() * 1000LL; 2517 if (startTimeOffsetUs < 0) { // Start time offset was not set 2518 startTimeOffsetUs = kInitialDelayTimeUs; 2519 } 2520 int64_t initialDelayUs = 2521 mFirstSampleTimeRealUs - mStartTimeRealUs - startTimeOffsetUs; 2522 2523 mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2524 trackNum | MEDIA_RECORDER_TRACK_INFO_INITIAL_DELAY_MS, 2525 (initialDelayUs) / 1000); 2526 } 2527 2528 mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2529 trackNum | MEDIA_RECORDER_TRACK_INFO_DATA_KBYTES, 2530 mMdatSizeBytes / 1024); 2531 2532 if (hasMultipleTracks) { 2533 mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2534 trackNum | MEDIA_RECORDER_TRACK_INFO_MAX_CHUNK_DUR_MS, 2535 mMaxChunkDurationUs / 1000); 2536 2537 int64_t moovStartTimeUs = mOwner->getStartTimestampUs(); 2538 if (mStartTimestampUs != moovStartTimeUs) { 2539 int64_t startTimeOffsetUs = mStartTimestampUs - moovStartTimeUs; 2540 mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2541 trackNum | MEDIA_RECORDER_TRACK_INFO_START_OFFSET_MS, 2542 startTimeOffsetUs / 1000); 2543 } 2544 } 2545} 2546 2547void MPEG4Writer::Track::trackProgressStatus(int64_t timeUs, status_t err) { 2548 ALOGV("trackProgressStatus: %" PRId64 " us", timeUs); 2549 2550 if (mTrackEveryTimeDurationUs > 0 && 2551 timeUs - mPreviousTrackTimeUs >= mTrackEveryTimeDurationUs) { 2552 ALOGV("Fire time tracking progress status at %" PRId64 " us", timeUs); 2553 mOwner->trackProgressStatus(mTrackId, timeUs - mPreviousTrackTimeUs, err); 2554 mPreviousTrackTimeUs = timeUs; 2555 } 2556} 2557 2558void MPEG4Writer::trackProgressStatus( 2559 size_t trackId, int64_t timeUs, status_t err) { 2560 Mutex::Autolock lock(mLock); 2561 int32_t trackNum = (trackId << 28); 2562 2563 // Error notification 2564 // Do not consider ERROR_END_OF_STREAM an error 2565 if (err != OK && err != ERROR_END_OF_STREAM) { 2566 notify(MEDIA_RECORDER_TRACK_EVENT_ERROR, 2567 trackNum | MEDIA_RECORDER_TRACK_ERROR_GENERAL, 2568 err); 2569 return; 2570 } 2571 2572 if (timeUs == -1) { 2573 // Send completion notification 2574 notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2575 trackNum | MEDIA_RECORDER_TRACK_INFO_COMPLETION_STATUS, 2576 err); 2577 } else { 2578 // Send progress status 2579 notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2580 trackNum | MEDIA_RECORDER_TRACK_INFO_PROGRESS_IN_TIME, 2581 timeUs / 1000); 2582 } 2583} 2584 2585void MPEG4Writer::setDriftTimeUs(int64_t driftTimeUs) { 2586 ALOGV("setDriftTimeUs: %" PRId64 " us", driftTimeUs); 2587 Mutex::Autolock autolock(mLock); 2588 mDriftTimeUs = driftTimeUs; 2589} 2590 2591int64_t MPEG4Writer::getDriftTimeUs() { 2592 ALOGV("getDriftTimeUs: %" PRId64 " us", mDriftTimeUs); 2593 Mutex::Autolock autolock(mLock); 2594 return mDriftTimeUs; 2595} 2596 2597bool MPEG4Writer::isRealTimeRecording() const { 2598 return mIsRealTimeRecording; 2599} 2600 2601bool MPEG4Writer::useNalLengthFour() { 2602 return mUse4ByteNalLength; 2603} 2604 2605void MPEG4Writer::Track::bufferChunk(int64_t timestampUs) { 2606 ALOGV("bufferChunk"); 2607 2608 Chunk chunk(this, timestampUs, mChunkSamples); 2609 mOwner->bufferChunk(chunk); 2610 mChunkSamples.clear(); 2611} 2612 2613int64_t MPEG4Writer::Track::getDurationUs() const { 2614 return mTrackDurationUs; 2615} 2616 2617int64_t MPEG4Writer::Track::getEstimatedTrackSizeBytes() const { 2618 return mEstimatedTrackSizeBytes; 2619} 2620 2621status_t MPEG4Writer::Track::checkCodecSpecificData() const { 2622 const char *mime; 2623 CHECK(mMeta->findCString(kKeyMIMEType, &mime)); 2624 if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AAC, mime) || 2625 !strcasecmp(MEDIA_MIMETYPE_VIDEO_MPEG4, mime) || 2626 !strcasecmp(MEDIA_MIMETYPE_VIDEO_AVC, mime)) { 2627 if (!mCodecSpecificData || 2628 mCodecSpecificDataSize <= 0) { 2629 ALOGE("Missing codec specific data"); 2630 return ERROR_MALFORMED; 2631 } 2632 } else { 2633 if (mCodecSpecificData || 2634 mCodecSpecificDataSize > 0) { 2635 ALOGE("Unexepected codec specific data found"); 2636 return ERROR_MALFORMED; 2637 } 2638 } 2639 return OK; 2640} 2641 2642void MPEG4Writer::Track::writeTrackHeader(bool use32BitOffset) { 2643 2644 ALOGV("%s track time scale: %d", 2645 mIsAudio? "Audio": "Video", mTimeScale); 2646 2647 uint32_t now = getMpeg4Time(); 2648 mOwner->beginBox("trak"); 2649 writeTkhdBox(now); 2650 mOwner->beginBox("mdia"); 2651 writeMdhdBox(now); 2652 writeHdlrBox(); 2653 mOwner->beginBox("minf"); 2654 if (mIsAudio) { 2655 writeSmhdBox(); 2656 } else { 2657 writeVmhdBox(); 2658 } 2659 writeDinfBox(); 2660 writeStblBox(use32BitOffset); 2661 mOwner->endBox(); // minf 2662 mOwner->endBox(); // mdia 2663 mOwner->endBox(); // trak 2664} 2665 2666void MPEG4Writer::Track::writeStblBox(bool use32BitOffset) { 2667 mOwner->beginBox("stbl"); 2668 mOwner->beginBox("stsd"); 2669 mOwner->writeInt32(0); // version=0, flags=0 2670 mOwner->writeInt32(1); // entry count 2671 if (mIsAudio) { 2672 writeAudioFourCCBox(); 2673 } else { 2674 writeVideoFourCCBox(); 2675 } 2676 mOwner->endBox(); // stsd 2677 writeSttsBox(); 2678 writeCttsBox(); 2679 if (!mIsAudio) { 2680 writeStssBox(); 2681 } 2682 writeStszBox(); 2683 writeStscBox(); 2684 writeStcoBox(use32BitOffset); 2685 mOwner->endBox(); // stbl 2686} 2687 2688void MPEG4Writer::Track::writeVideoFourCCBox() { 2689 const char *mime; 2690 bool success = mMeta->findCString(kKeyMIMEType, &mime); 2691 CHECK(success); 2692 if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_MPEG4, mime)) { 2693 mOwner->beginBox("mp4v"); 2694 } else if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_H263, mime)) { 2695 mOwner->beginBox("s263"); 2696 } else if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_AVC, mime)) { 2697 mOwner->beginBox("avc1"); 2698 } else { 2699 ALOGE("Unknown mime type '%s'.", mime); 2700 CHECK(!"should not be here, unknown mime type."); 2701 } 2702 2703 mOwner->writeInt32(0); // reserved 2704 mOwner->writeInt16(0); // reserved 2705 mOwner->writeInt16(1); // data ref index 2706 mOwner->writeInt16(0); // predefined 2707 mOwner->writeInt16(0); // reserved 2708 mOwner->writeInt32(0); // predefined 2709 mOwner->writeInt32(0); // predefined 2710 mOwner->writeInt32(0); // predefined 2711 2712 int32_t width, height; 2713 success = mMeta->findInt32(kKeyWidth, &width); 2714 success = success && mMeta->findInt32(kKeyHeight, &height); 2715 CHECK(success); 2716 2717 mOwner->writeInt16(width); 2718 mOwner->writeInt16(height); 2719 mOwner->writeInt32(0x480000); // horiz resolution 2720 mOwner->writeInt32(0x480000); // vert resolution 2721 mOwner->writeInt32(0); // reserved 2722 mOwner->writeInt16(1); // frame count 2723 mOwner->writeInt8(0); // compressor string length 2724 mOwner->write(" ", 31); 2725 mOwner->writeInt16(0x18); // depth 2726 mOwner->writeInt16(-1); // predefined 2727 2728 CHECK_LT(23 + mCodecSpecificDataSize, 128); 2729 2730 if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_MPEG4, mime)) { 2731 writeMp4vEsdsBox(); 2732 } else if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_H263, mime)) { 2733 writeD263Box(); 2734 } else if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_AVC, mime)) { 2735 writeAvccBox(); 2736 } 2737 2738 writePaspBox(); 2739 mOwner->endBox(); // mp4v, s263 or avc1 2740} 2741 2742void MPEG4Writer::Track::writeAudioFourCCBox() { 2743 const char *mime; 2744 bool success = mMeta->findCString(kKeyMIMEType, &mime); 2745 CHECK(success); 2746 const char *fourcc = NULL; 2747 if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AMR_NB, mime)) { 2748 fourcc = "samr"; 2749 } else if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AMR_WB, mime)) { 2750 fourcc = "sawb"; 2751 } else if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AAC, mime)) { 2752 fourcc = "mp4a"; 2753 } else { 2754 ALOGE("Unknown mime type '%s'.", mime); 2755 CHECK(!"should not be here, unknown mime type."); 2756 } 2757 2758 mOwner->beginBox(fourcc); // audio format 2759 mOwner->writeInt32(0); // reserved 2760 mOwner->writeInt16(0); // reserved 2761 mOwner->writeInt16(0x1); // data ref index 2762 mOwner->writeInt32(0); // reserved 2763 mOwner->writeInt32(0); // reserved 2764 int32_t nChannels; 2765 CHECK_EQ(true, mMeta->findInt32(kKeyChannelCount, &nChannels)); 2766 mOwner->writeInt16(nChannels); // channel count 2767 mOwner->writeInt16(16); // sample size 2768 mOwner->writeInt16(0); // predefined 2769 mOwner->writeInt16(0); // reserved 2770 2771 int32_t samplerate; 2772 success = mMeta->findInt32(kKeySampleRate, &samplerate); 2773 CHECK(success); 2774 mOwner->writeInt32(samplerate << 16); 2775 if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AAC, mime)) { 2776 writeMp4aEsdsBox(); 2777 } else if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AMR_NB, mime) || 2778 !strcasecmp(MEDIA_MIMETYPE_AUDIO_AMR_WB, mime)) { 2779 writeDamrBox(); 2780 } 2781 mOwner->endBox(); 2782} 2783 2784void MPEG4Writer::Track::writeMp4aEsdsBox() { 2785 mOwner->beginBox("esds"); 2786 CHECK(mCodecSpecificData); 2787 CHECK_GT(mCodecSpecificDataSize, 0); 2788 2789 // Make sure all sizes encode to a single byte. 2790 CHECK_LT(mCodecSpecificDataSize + 23, 128); 2791 2792 mOwner->writeInt32(0); // version=0, flags=0 2793 mOwner->writeInt8(0x03); // ES_DescrTag 2794 mOwner->writeInt8(23 + mCodecSpecificDataSize); 2795 mOwner->writeInt16(0x0000);// ES_ID 2796 mOwner->writeInt8(0x00); 2797 2798 mOwner->writeInt8(0x04); // DecoderConfigDescrTag 2799 mOwner->writeInt8(15 + mCodecSpecificDataSize); 2800 mOwner->writeInt8(0x40); // objectTypeIndication ISO/IEC 14492-2 2801 mOwner->writeInt8(0x15); // streamType AudioStream 2802 2803 mOwner->writeInt16(0x03); // XXX 2804 mOwner->writeInt8(0x00); // buffer size 24-bit 2805 int32_t bitRate; 2806 bool success = mMeta->findInt32(kKeyBitRate, &bitRate); 2807 mOwner->writeInt32(success ? bitRate : 96000); // max bit rate 2808 mOwner->writeInt32(success ? bitRate : 96000); // avg bit rate 2809 2810 mOwner->writeInt8(0x05); // DecoderSpecificInfoTag 2811 mOwner->writeInt8(mCodecSpecificDataSize); 2812 mOwner->write(mCodecSpecificData, mCodecSpecificDataSize); 2813 2814 static const uint8_t kData2[] = { 2815 0x06, // SLConfigDescriptorTag 2816 0x01, 2817 0x02 2818 }; 2819 mOwner->write(kData2, sizeof(kData2)); 2820 2821 mOwner->endBox(); // esds 2822} 2823 2824void MPEG4Writer::Track::writeMp4vEsdsBox() { 2825 CHECK(mCodecSpecificData); 2826 CHECK_GT(mCodecSpecificDataSize, 0); 2827 mOwner->beginBox("esds"); 2828 2829 mOwner->writeInt32(0); // version=0, flags=0 2830 2831 mOwner->writeInt8(0x03); // ES_DescrTag 2832 mOwner->writeInt8(23 + mCodecSpecificDataSize); 2833 mOwner->writeInt16(0x0000); // ES_ID 2834 mOwner->writeInt8(0x1f); 2835 2836 mOwner->writeInt8(0x04); // DecoderConfigDescrTag 2837 mOwner->writeInt8(15 + mCodecSpecificDataSize); 2838 mOwner->writeInt8(0x20); // objectTypeIndication ISO/IEC 14492-2 2839 mOwner->writeInt8(0x11); // streamType VisualStream 2840 2841 static const uint8_t kData[] = { 2842 0x01, 0x77, 0x00, 2843 0x00, 0x03, 0xe8, 0x00, 2844 0x00, 0x03, 0xe8, 0x00 2845 }; 2846 mOwner->write(kData, sizeof(kData)); 2847 2848 mOwner->writeInt8(0x05); // DecoderSpecificInfoTag 2849 2850 mOwner->writeInt8(mCodecSpecificDataSize); 2851 mOwner->write(mCodecSpecificData, mCodecSpecificDataSize); 2852 2853 static const uint8_t kData2[] = { 2854 0x06, // SLConfigDescriptorTag 2855 0x01, 2856 0x02 2857 }; 2858 mOwner->write(kData2, sizeof(kData2)); 2859 2860 mOwner->endBox(); // esds 2861} 2862 2863void MPEG4Writer::Track::writeTkhdBox(uint32_t now) { 2864 mOwner->beginBox("tkhd"); 2865 // Flags = 7 to indicate that the track is enabled, and 2866 // part of the presentation 2867 mOwner->writeInt32(0x07); // version=0, flags=7 2868 mOwner->writeInt32(now); // creation time 2869 mOwner->writeInt32(now); // modification time 2870 mOwner->writeInt32(mTrackId); // track id starts with 1 2871 mOwner->writeInt32(0); // reserved 2872 int64_t trakDurationUs = getDurationUs(); 2873 int32_t mvhdTimeScale = mOwner->getTimeScale(); 2874 int32_t tkhdDuration = 2875 (trakDurationUs * mvhdTimeScale + 5E5) / 1E6; 2876 mOwner->writeInt32(tkhdDuration); // in mvhd timescale 2877 mOwner->writeInt32(0); // reserved 2878 mOwner->writeInt32(0); // reserved 2879 mOwner->writeInt16(0); // layer 2880 mOwner->writeInt16(0); // alternate group 2881 mOwner->writeInt16(mIsAudio ? 0x100 : 0); // volume 2882 mOwner->writeInt16(0); // reserved 2883 2884 mOwner->writeCompositionMatrix(mRotation); // matrix 2885 2886 if (mIsAudio) { 2887 mOwner->writeInt32(0); 2888 mOwner->writeInt32(0); 2889 } else { 2890 int32_t width, height; 2891 bool success = mMeta->findInt32(kKeyWidth, &width); 2892 success = success && mMeta->findInt32(kKeyHeight, &height); 2893 CHECK(success); 2894 2895 mOwner->writeInt32(width << 16); // 32-bit fixed-point value 2896 mOwner->writeInt32(height << 16); // 32-bit fixed-point value 2897 } 2898 mOwner->endBox(); // tkhd 2899} 2900 2901void MPEG4Writer::Track::writeVmhdBox() { 2902 mOwner->beginBox("vmhd"); 2903 mOwner->writeInt32(0x01); // version=0, flags=1 2904 mOwner->writeInt16(0); // graphics mode 2905 mOwner->writeInt16(0); // opcolor 2906 mOwner->writeInt16(0); 2907 mOwner->writeInt16(0); 2908 mOwner->endBox(); 2909} 2910 2911void MPEG4Writer::Track::writeSmhdBox() { 2912 mOwner->beginBox("smhd"); 2913 mOwner->writeInt32(0); // version=0, flags=0 2914 mOwner->writeInt16(0); // balance 2915 mOwner->writeInt16(0); // reserved 2916 mOwner->endBox(); 2917} 2918 2919void MPEG4Writer::Track::writeHdlrBox() { 2920 mOwner->beginBox("hdlr"); 2921 mOwner->writeInt32(0); // version=0, flags=0 2922 mOwner->writeInt32(0); // component type: should be mhlr 2923 mOwner->writeFourcc(mIsAudio ? "soun" : "vide"); // component subtype 2924 mOwner->writeInt32(0); // reserved 2925 mOwner->writeInt32(0); // reserved 2926 mOwner->writeInt32(0); // reserved 2927 // Removing "r" for the name string just makes the string 4 byte aligned 2928 mOwner->writeCString(mIsAudio ? "SoundHandle": "VideoHandle"); // name 2929 mOwner->endBox(); 2930} 2931 2932void MPEG4Writer::Track::writeMdhdBox(uint32_t now) { 2933 int64_t trakDurationUs = getDurationUs(); 2934 mOwner->beginBox("mdhd"); 2935 mOwner->writeInt32(0); // version=0, flags=0 2936 mOwner->writeInt32(now); // creation time 2937 mOwner->writeInt32(now); // modification time 2938 mOwner->writeInt32(mTimeScale); // media timescale 2939 int32_t mdhdDuration = (trakDurationUs * mTimeScale + 5E5) / 1E6; 2940 mOwner->writeInt32(mdhdDuration); // use media timescale 2941 // Language follows the three letter standard ISO-639-2/T 2942 // 'e', 'n', 'g' for "English", for instance. 2943 // Each character is packed as the difference between its ASCII value and 0x60. 2944 // For "English", these are 00101, 01110, 00111. 2945 // XXX: Where is the padding bit located: 0x15C7? 2946 mOwner->writeInt16(0); // language code 2947 mOwner->writeInt16(0); // predefined 2948 mOwner->endBox(); 2949} 2950 2951void MPEG4Writer::Track::writeDamrBox() { 2952 // 3gpp2 Spec AMRSampleEntry fields 2953 mOwner->beginBox("damr"); 2954 mOwner->writeCString(" "); // vendor: 4 bytes 2955 mOwner->writeInt8(0); // decoder version 2956 mOwner->writeInt16(0x83FF); // mode set: all enabled 2957 mOwner->writeInt8(0); // mode change period 2958 mOwner->writeInt8(1); // frames per sample 2959 mOwner->endBox(); 2960} 2961 2962void MPEG4Writer::Track::writeUrlBox() { 2963 // The table index here refers to the sample description index 2964 // in the sample table entries. 2965 mOwner->beginBox("url "); 2966 mOwner->writeInt32(1); // version=0, flags=1 (self-contained) 2967 mOwner->endBox(); // url 2968} 2969 2970void MPEG4Writer::Track::writeDrefBox() { 2971 mOwner->beginBox("dref"); 2972 mOwner->writeInt32(0); // version=0, flags=0 2973 mOwner->writeInt32(1); // entry count (either url or urn) 2974 writeUrlBox(); 2975 mOwner->endBox(); // dref 2976} 2977 2978void MPEG4Writer::Track::writeDinfBox() { 2979 mOwner->beginBox("dinf"); 2980 writeDrefBox(); 2981 mOwner->endBox(); // dinf 2982} 2983 2984void MPEG4Writer::Track::writeAvccBox() { 2985 CHECK(mCodecSpecificData); 2986 CHECK_GE(mCodecSpecificDataSize, 5); 2987 2988 // Patch avcc's lengthSize field to match the number 2989 // of bytes we use to indicate the size of a nal unit. 2990 uint8_t *ptr = (uint8_t *)mCodecSpecificData; 2991 ptr[4] = (ptr[4] & 0xfc) | (mOwner->useNalLengthFour() ? 3 : 1); 2992 mOwner->beginBox("avcC"); 2993 mOwner->write(mCodecSpecificData, mCodecSpecificDataSize); 2994 mOwner->endBox(); // avcC 2995} 2996 2997void MPEG4Writer::Track::writeD263Box() { 2998 mOwner->beginBox("d263"); 2999 mOwner->writeInt32(0); // vendor 3000 mOwner->writeInt8(0); // decoder version 3001 mOwner->writeInt8(10); // level: 10 3002 mOwner->writeInt8(0); // profile: 0 3003 mOwner->endBox(); // d263 3004} 3005 3006// This is useful if the pixel is not square 3007void MPEG4Writer::Track::writePaspBox() { 3008 mOwner->beginBox("pasp"); 3009 mOwner->writeInt32(1 << 16); // hspacing 3010 mOwner->writeInt32(1 << 16); // vspacing 3011 mOwner->endBox(); // pasp 3012} 3013 3014int32_t MPEG4Writer::Track::getStartTimeOffsetScaledTime() const { 3015 int64_t trackStartTimeOffsetUs = 0; 3016 int64_t moovStartTimeUs = mOwner->getStartTimestampUs(); 3017 if (mStartTimestampUs != moovStartTimeUs) { 3018 CHECK_GT(mStartTimestampUs, moovStartTimeUs); 3019 trackStartTimeOffsetUs = mStartTimestampUs - moovStartTimeUs; 3020 } 3021 return (trackStartTimeOffsetUs * mTimeScale + 500000LL) / 1000000LL; 3022} 3023 3024void MPEG4Writer::Track::writeSttsBox() { 3025 mOwner->beginBox("stts"); 3026 mOwner->writeInt32(0); // version=0, flags=0 3027 uint32_t duration; 3028 CHECK(mSttsTableEntries->get(duration, 1)); 3029 duration = htonl(duration); // Back to host byte order 3030 mSttsTableEntries->set(htonl(duration + getStartTimeOffsetScaledTime()), 1); 3031 mSttsTableEntries->write(mOwner); 3032 mOwner->endBox(); // stts 3033} 3034 3035void MPEG4Writer::Track::writeCttsBox() { 3036 if (mIsAudio) { // ctts is not for audio 3037 return; 3038 } 3039 3040 // There is no B frame at all 3041 if (mMinCttsOffsetTimeUs == mMaxCttsOffsetTimeUs) { 3042 return; 3043 } 3044 3045 // Do not write ctts box when there is no need to have it. 3046 if (mCttsTableEntries->count() == 0) { 3047 return; 3048 } 3049 3050 ALOGV("ctts box has %d entries with range [%" PRId64 ", %" PRId64 "]", 3051 mCttsTableEntries->count(), mMinCttsOffsetTimeUs, mMaxCttsOffsetTimeUs); 3052 3053 mOwner->beginBox("ctts"); 3054 mOwner->writeInt32(0); // version=0, flags=0 3055 uint32_t duration; 3056 CHECK(mCttsTableEntries->get(duration, 1)); 3057 duration = htonl(duration); // Back host byte order 3058 mCttsTableEntries->set(htonl(duration + getStartTimeOffsetScaledTime() - mMinCttsOffsetTimeUs), 1); 3059 mCttsTableEntries->write(mOwner); 3060 mOwner->endBox(); // ctts 3061} 3062 3063void MPEG4Writer::Track::writeStssBox() { 3064 mOwner->beginBox("stss"); 3065 mOwner->writeInt32(0); // version=0, flags=0 3066 mStssTableEntries->write(mOwner); 3067 mOwner->endBox(); // stss 3068} 3069 3070void MPEG4Writer::Track::writeStszBox() { 3071 mOwner->beginBox("stsz"); 3072 mOwner->writeInt32(0); // version=0, flags=0 3073 mOwner->writeInt32(0); 3074 mStszTableEntries->write(mOwner); 3075 mOwner->endBox(); // stsz 3076} 3077 3078void MPEG4Writer::Track::writeStscBox() { 3079 mOwner->beginBox("stsc"); 3080 mOwner->writeInt32(0); // version=0, flags=0 3081 mStscTableEntries->write(mOwner); 3082 mOwner->endBox(); // stsc 3083} 3084 3085void MPEG4Writer::Track::writeStcoBox(bool use32BitOffset) { 3086 mOwner->beginBox(use32BitOffset? "stco": "co64"); 3087 mOwner->writeInt32(0); // version=0, flags=0 3088 if (use32BitOffset) { 3089 mStcoTableEntries->write(mOwner); 3090 } else { 3091 mCo64TableEntries->write(mOwner); 3092 } 3093 mOwner->endBox(); // stco or co64 3094} 3095 3096void MPEG4Writer::writeUdtaBox() { 3097 beginBox("udta"); 3098 writeGeoDataBox(); 3099 endBox(); 3100} 3101 3102/* 3103 * Geodata is stored according to ISO-6709 standard. 3104 */ 3105void MPEG4Writer::writeGeoDataBox() { 3106 beginBox("\xA9xyz"); 3107 /* 3108 * For historical reasons, any user data start 3109 * with "\0xA9", must be followed by its assoicated 3110 * language code. 3111 * 0x0012: text string length 3112 * 0x15c7: lang (locale) code: en 3113 */ 3114 writeInt32(0x001215c7); 3115 writeLatitude(mLatitudex10000); 3116 writeLongitude(mLongitudex10000); 3117 writeInt8(0x2F); 3118 endBox(); 3119} 3120 3121} // namespace android 3122