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} 827 828status_t MPEG4Writer::reset() { 829 if (mInitCheck != OK) { 830 return OK; 831 } else { 832 if (!mWriterThreadStarted || 833 !mStarted) { 834 if (mWriterThreadStarted) { 835 stopWriterThread(); 836 } 837 release(); 838 return OK; 839 } 840 } 841 842 status_t err = OK; 843 int64_t maxDurationUs = 0; 844 int64_t minDurationUs = 0x7fffffffffffffffLL; 845 for (List<Track *>::iterator it = mTracks.begin(); 846 it != mTracks.end(); ++it) { 847 status_t status = (*it)->stop(); 848 if (err == OK && status != OK) { 849 err = status; 850 } 851 852 int64_t durationUs = (*it)->getDurationUs(); 853 if (durationUs > maxDurationUs) { 854 maxDurationUs = durationUs; 855 } 856 if (durationUs < minDurationUs) { 857 minDurationUs = durationUs; 858 } 859 } 860 861 if (mTracks.size() > 1) { 862 ALOGD("Duration from tracks range is [%" PRId64 ", %" PRId64 "] us", 863 minDurationUs, maxDurationUs); 864 } 865 866 stopWriterThread(); 867 868 // Do not write out movie header on error. 869 if (err != OK) { 870 release(); 871 return err; 872 } 873 874 // Fix up the size of the 'mdat' chunk. 875 if (mUse32BitOffset) { 876 lseek64(mFd, mMdatOffset, SEEK_SET); 877 uint32_t size = htonl(static_cast<uint32_t>(mOffset - mMdatOffset)); 878 ::write(mFd, &size, 4); 879 } else { 880 lseek64(mFd, mMdatOffset + 8, SEEK_SET); 881 uint64_t size = mOffset - mMdatOffset; 882 size = hton64(size); 883 ::write(mFd, &size, 8); 884 } 885 lseek64(mFd, mOffset, SEEK_SET); 886 887 // Construct moov box now 888 mMoovBoxBufferOffset = 0; 889 mWriteMoovBoxToMemory = mStreamableFile; 890 if (mWriteMoovBoxToMemory) { 891 // There is no need to allocate in-memory cache 892 // for moov box if the file is not streamable. 893 894 mMoovBoxBuffer = (uint8_t *) malloc(mEstimatedMoovBoxSize); 895 CHECK(mMoovBoxBuffer != NULL); 896 } 897 writeMoovBox(maxDurationUs); 898 899 // mWriteMoovBoxToMemory could be set to false in 900 // MPEG4Writer::write() method 901 if (mWriteMoovBoxToMemory) { 902 mWriteMoovBoxToMemory = false; 903 // Content of the moov box is saved in the cache, and the in-memory 904 // moov box needs to be written to the file in a single shot. 905 906 CHECK_LE(mMoovBoxBufferOffset + 8, mEstimatedMoovBoxSize); 907 908 // Moov box 909 lseek64(mFd, mFreeBoxOffset, SEEK_SET); 910 mOffset = mFreeBoxOffset; 911 write(mMoovBoxBuffer, 1, mMoovBoxBufferOffset); 912 913 // Free box 914 lseek64(mFd, mOffset, SEEK_SET); 915 writeInt32(mEstimatedMoovBoxSize - mMoovBoxBufferOffset); 916 write("free", 4); 917 } else { 918 ALOGI("The mp4 file will not be streamable."); 919 } 920 921 // Free in-memory cache for moov box 922 if (mMoovBoxBuffer != NULL) { 923 free(mMoovBoxBuffer); 924 mMoovBoxBuffer = NULL; 925 mMoovBoxBufferOffset = 0; 926 } 927 928 CHECK(mBoxes.empty()); 929 930 release(); 931 return err; 932} 933 934uint32_t MPEG4Writer::getMpeg4Time() { 935 time_t now = time(NULL); 936 // MP4 file uses time counting seconds since midnight, Jan. 1, 1904 937 // while time function returns Unix epoch values which starts 938 // at 1970-01-01. Lets add the number of seconds between them 939 uint32_t mpeg4Time = now + (66 * 365 + 17) * (24 * 60 * 60); 940 return mpeg4Time; 941} 942 943void MPEG4Writer::writeMvhdBox(int64_t durationUs) { 944 uint32_t now = getMpeg4Time(); 945 beginBox("mvhd"); 946 writeInt32(0); // version=0, flags=0 947 writeInt32(now); // creation time 948 writeInt32(now); // modification time 949 writeInt32(mTimeScale); // mvhd timescale 950 int32_t duration = (durationUs * mTimeScale + 5E5) / 1E6; 951 writeInt32(duration); 952 writeInt32(0x10000); // rate: 1.0 953 writeInt16(0x100); // volume 954 writeInt16(0); // reserved 955 writeInt32(0); // reserved 956 writeInt32(0); // reserved 957 writeCompositionMatrix(0); // matrix 958 writeInt32(0); // predefined 959 writeInt32(0); // predefined 960 writeInt32(0); // predefined 961 writeInt32(0); // predefined 962 writeInt32(0); // predefined 963 writeInt32(0); // predefined 964 writeInt32(mTracks.size() + 1); // nextTrackID 965 endBox(); // mvhd 966} 967 968void MPEG4Writer::writeMoovBox(int64_t durationUs) { 969 beginBox("moov"); 970 writeMvhdBox(durationUs); 971 if (mAreGeoTagsAvailable) { 972 writeUdtaBox(); 973 } 974 int32_t id = 1; 975 for (List<Track *>::iterator it = mTracks.begin(); 976 it != mTracks.end(); ++it, ++id) { 977 (*it)->writeTrackHeader(mUse32BitOffset); 978 } 979 endBox(); // moov 980} 981 982void MPEG4Writer::writeFtypBox(MetaData *param) { 983 beginBox("ftyp"); 984 985 int32_t fileType; 986 if (param && param->findInt32(kKeyFileType, &fileType) && 987 fileType != OUTPUT_FORMAT_MPEG_4) { 988 writeFourcc("3gp4"); 989 writeInt32(0); 990 writeFourcc("isom"); 991 writeFourcc("3gp4"); 992 } else { 993 writeFourcc("mp42"); 994 writeInt32(0); 995 writeFourcc("isom"); 996 writeFourcc("mp42"); 997 } 998 999 endBox(); 1000} 1001 1002static bool isTestModeEnabled() { 1003#if (PROPERTY_VALUE_MAX < 5) 1004#error "PROPERTY_VALUE_MAX must be at least 5" 1005#endif 1006 1007 // Test mode is enabled only if rw.media.record.test system 1008 // property is enabled. 1009 char value[PROPERTY_VALUE_MAX]; 1010 if (property_get("rw.media.record.test", value, NULL) && 1011 (!strcasecmp(value, "true") || !strcasecmp(value, "1"))) { 1012 return true; 1013 } 1014 return false; 1015} 1016 1017void MPEG4Writer::sendSessionSummary() { 1018 // Send session summary only if test mode is enabled 1019 if (!isTestModeEnabled()) { 1020 return; 1021 } 1022 1023 for (List<ChunkInfo>::iterator it = mChunkInfos.begin(); 1024 it != mChunkInfos.end(); ++it) { 1025 int trackNum = it->mTrack->getTrackId() << 28; 1026 notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 1027 trackNum | MEDIA_RECORDER_TRACK_INTER_CHUNK_TIME_MS, 1028 it->mMaxInterChunkDurUs); 1029 } 1030} 1031 1032status_t MPEG4Writer::setInterleaveDuration(uint32_t durationUs) { 1033 mInterleaveDurationUs = durationUs; 1034 return OK; 1035} 1036 1037void MPEG4Writer::lock() { 1038 mLock.lock(); 1039} 1040 1041void MPEG4Writer::unlock() { 1042 mLock.unlock(); 1043} 1044 1045off64_t MPEG4Writer::addSample_l(MediaBuffer *buffer) { 1046 off64_t old_offset = mOffset; 1047 1048 ::write(mFd, 1049 (const uint8_t *)buffer->data() + buffer->range_offset(), 1050 buffer->range_length()); 1051 1052 mOffset += buffer->range_length(); 1053 1054 return old_offset; 1055} 1056 1057static void StripStartcode(MediaBuffer *buffer) { 1058 if (buffer->range_length() < 4) { 1059 return; 1060 } 1061 1062 const uint8_t *ptr = 1063 (const uint8_t *)buffer->data() + buffer->range_offset(); 1064 1065 if (!memcmp(ptr, "\x00\x00\x00\x01", 4)) { 1066 buffer->set_range( 1067 buffer->range_offset() + 4, buffer->range_length() - 4); 1068 } 1069} 1070 1071off64_t MPEG4Writer::addLengthPrefixedSample_l(MediaBuffer *buffer) { 1072 off64_t old_offset = mOffset; 1073 1074 size_t length = buffer->range_length(); 1075 1076 if (mUse4ByteNalLength) { 1077 uint8_t x = length >> 24; 1078 ::write(mFd, &x, 1); 1079 x = (length >> 16) & 0xff; 1080 ::write(mFd, &x, 1); 1081 x = (length >> 8) & 0xff; 1082 ::write(mFd, &x, 1); 1083 x = length & 0xff; 1084 ::write(mFd, &x, 1); 1085 1086 ::write(mFd, 1087 (const uint8_t *)buffer->data() + buffer->range_offset(), 1088 length); 1089 1090 mOffset += length + 4; 1091 } else { 1092 CHECK_LT(length, 65536); 1093 1094 uint8_t x = length >> 8; 1095 ::write(mFd, &x, 1); 1096 x = length & 0xff; 1097 ::write(mFd, &x, 1); 1098 ::write(mFd, (const uint8_t *)buffer->data() + buffer->range_offset(), length); 1099 mOffset += length + 2; 1100 } 1101 1102 return old_offset; 1103} 1104 1105size_t MPEG4Writer::write( 1106 const void *ptr, size_t size, size_t nmemb) { 1107 1108 const size_t bytes = size * nmemb; 1109 if (mWriteMoovBoxToMemory) { 1110 1111 off64_t moovBoxSize = 8 + mMoovBoxBufferOffset + bytes; 1112 if (moovBoxSize > mEstimatedMoovBoxSize) { 1113 // The reserved moov box at the beginning of the file 1114 // is not big enough. Moov box should be written to 1115 // the end of the file from now on, but not to the 1116 // in-memory cache. 1117 1118 // We write partial moov box that is in the memory to 1119 // the file first. 1120 for (List<off64_t>::iterator it = mBoxes.begin(); 1121 it != mBoxes.end(); ++it) { 1122 (*it) += mOffset; 1123 } 1124 lseek64(mFd, mOffset, SEEK_SET); 1125 ::write(mFd, mMoovBoxBuffer, mMoovBoxBufferOffset); 1126 ::write(mFd, ptr, bytes); 1127 mOffset += (bytes + mMoovBoxBufferOffset); 1128 1129 // All subsequent moov box content will be written 1130 // to the end of the file. 1131 mWriteMoovBoxToMemory = false; 1132 } else { 1133 memcpy(mMoovBoxBuffer + mMoovBoxBufferOffset, ptr, bytes); 1134 mMoovBoxBufferOffset += bytes; 1135 } 1136 } else { 1137 ::write(mFd, ptr, size * nmemb); 1138 mOffset += bytes; 1139 } 1140 return bytes; 1141} 1142 1143void MPEG4Writer::beginBox(const char *fourcc) { 1144 CHECK_EQ(strlen(fourcc), 4); 1145 1146 mBoxes.push_back(mWriteMoovBoxToMemory? 1147 mMoovBoxBufferOffset: mOffset); 1148 1149 writeInt32(0); 1150 writeFourcc(fourcc); 1151} 1152 1153void MPEG4Writer::endBox() { 1154 CHECK(!mBoxes.empty()); 1155 1156 off64_t offset = *--mBoxes.end(); 1157 mBoxes.erase(--mBoxes.end()); 1158 1159 if (mWriteMoovBoxToMemory) { 1160 int32_t x = htonl(mMoovBoxBufferOffset - offset); 1161 memcpy(mMoovBoxBuffer + offset, &x, 4); 1162 } else { 1163 lseek64(mFd, offset, SEEK_SET); 1164 writeInt32(mOffset - offset); 1165 mOffset -= 4; 1166 lseek64(mFd, mOffset, SEEK_SET); 1167 } 1168} 1169 1170void MPEG4Writer::writeInt8(int8_t x) { 1171 write(&x, 1, 1); 1172} 1173 1174void MPEG4Writer::writeInt16(int16_t x) { 1175 x = htons(x); 1176 write(&x, 1, 2); 1177} 1178 1179void MPEG4Writer::writeInt32(int32_t x) { 1180 x = htonl(x); 1181 write(&x, 1, 4); 1182} 1183 1184void MPEG4Writer::writeInt64(int64_t x) { 1185 x = hton64(x); 1186 write(&x, 1, 8); 1187} 1188 1189void MPEG4Writer::writeCString(const char *s) { 1190 size_t n = strlen(s); 1191 write(s, 1, n + 1); 1192} 1193 1194void MPEG4Writer::writeFourcc(const char *s) { 1195 CHECK_EQ(strlen(s), 4); 1196 write(s, 1, 4); 1197} 1198 1199 1200// Written in +/-DD.DDDD format 1201void MPEG4Writer::writeLatitude(int degreex10000) { 1202 bool isNegative = (degreex10000 < 0); 1203 char sign = isNegative? '-': '+'; 1204 1205 // Handle the whole part 1206 char str[9]; 1207 int wholePart = degreex10000 / 10000; 1208 if (wholePart == 0) { 1209 snprintf(str, 5, "%c%.2d.", sign, wholePart); 1210 } else { 1211 snprintf(str, 5, "%+.2d.", wholePart); 1212 } 1213 1214 // Handle the fractional part 1215 int fractionalPart = degreex10000 - (wholePart * 10000); 1216 if (fractionalPart < 0) { 1217 fractionalPart = -fractionalPart; 1218 } 1219 snprintf(&str[4], 5, "%.4d", fractionalPart); 1220 1221 // Do not write the null terminator 1222 write(str, 1, 8); 1223} 1224 1225// Written in +/- DDD.DDDD format 1226void MPEG4Writer::writeLongitude(int degreex10000) { 1227 bool isNegative = (degreex10000 < 0); 1228 char sign = isNegative? '-': '+'; 1229 1230 // Handle the whole part 1231 char str[10]; 1232 int wholePart = degreex10000 / 10000; 1233 if (wholePart == 0) { 1234 snprintf(str, 6, "%c%.3d.", sign, wholePart); 1235 } else { 1236 snprintf(str, 6, "%+.3d.", wholePart); 1237 } 1238 1239 // Handle the fractional part 1240 int fractionalPart = degreex10000 - (wholePart * 10000); 1241 if (fractionalPart < 0) { 1242 fractionalPart = -fractionalPart; 1243 } 1244 snprintf(&str[5], 5, "%.4d", fractionalPart); 1245 1246 // Do not write the null terminator 1247 write(str, 1, 9); 1248} 1249 1250/* 1251 * Geodata is stored according to ISO-6709 standard. 1252 * latitudex10000 is latitude in degrees times 10000, and 1253 * longitudex10000 is longitude in degrees times 10000. 1254 * The range for the latitude is in [-90, +90], and 1255 * The range for the longitude is in [-180, +180] 1256 */ 1257status_t MPEG4Writer::setGeoData(int latitudex10000, int longitudex10000) { 1258 // Is latitude or longitude out of range? 1259 if (latitudex10000 < -900000 || latitudex10000 > 900000 || 1260 longitudex10000 < -1800000 || longitudex10000 > 1800000) { 1261 return BAD_VALUE; 1262 } 1263 1264 mLatitudex10000 = latitudex10000; 1265 mLongitudex10000 = longitudex10000; 1266 mAreGeoTagsAvailable = true; 1267 return OK; 1268} 1269 1270void MPEG4Writer::write(const void *data, size_t size) { 1271 write(data, 1, size); 1272} 1273 1274bool MPEG4Writer::isFileStreamable() const { 1275 return mStreamableFile; 1276} 1277 1278bool MPEG4Writer::exceedsFileSizeLimit() { 1279 // No limit 1280 if (mMaxFileSizeLimitBytes == 0) { 1281 return false; 1282 } 1283 1284 int64_t nTotalBytesEstimate = static_cast<int64_t>(mEstimatedMoovBoxSize); 1285 for (List<Track *>::iterator it = mTracks.begin(); 1286 it != mTracks.end(); ++it) { 1287 nTotalBytesEstimate += (*it)->getEstimatedTrackSizeBytes(); 1288 } 1289 1290 if (!mStreamableFile) { 1291 // Add 1024 bytes as error tolerance 1292 return nTotalBytesEstimate + 1024 >= mMaxFileSizeLimitBytes; 1293 } 1294 // Be conservative in the estimate: do not exceed 95% of 1295 // the target file limit. For small target file size limit, though, 1296 // this will not help. 1297 return (nTotalBytesEstimate >= (95 * mMaxFileSizeLimitBytes) / 100); 1298} 1299 1300bool MPEG4Writer::exceedsFileDurationLimit() { 1301 // No limit 1302 if (mMaxFileDurationLimitUs == 0) { 1303 return false; 1304 } 1305 1306 for (List<Track *>::iterator it = mTracks.begin(); 1307 it != mTracks.end(); ++it) { 1308 if ((*it)->getDurationUs() >= mMaxFileDurationLimitUs) { 1309 return true; 1310 } 1311 } 1312 return false; 1313} 1314 1315bool MPEG4Writer::reachedEOS() { 1316 bool allDone = true; 1317 for (List<Track *>::iterator it = mTracks.begin(); 1318 it != mTracks.end(); ++it) { 1319 if (!(*it)->reachedEOS()) { 1320 allDone = false; 1321 break; 1322 } 1323 } 1324 1325 return allDone; 1326} 1327 1328void MPEG4Writer::setStartTimestampUs(int64_t timeUs) { 1329 ALOGI("setStartTimestampUs: %" PRId64, timeUs); 1330 CHECK_GE(timeUs, 0ll); 1331 Mutex::Autolock autoLock(mLock); 1332 if (mStartTimestampUs < 0 || mStartTimestampUs > timeUs) { 1333 mStartTimestampUs = timeUs; 1334 ALOGI("Earliest track starting time: %" PRId64, mStartTimestampUs); 1335 } 1336} 1337 1338int64_t MPEG4Writer::getStartTimestampUs() { 1339 Mutex::Autolock autoLock(mLock); 1340 return mStartTimestampUs; 1341} 1342 1343size_t MPEG4Writer::numTracks() { 1344 Mutex::Autolock autolock(mLock); 1345 return mTracks.size(); 1346} 1347 1348//////////////////////////////////////////////////////////////////////////////// 1349 1350MPEG4Writer::Track::Track( 1351 MPEG4Writer *owner, const sp<MediaSource> &source, size_t trackId) 1352 : mOwner(owner), 1353 mMeta(source->getFormat()), 1354 mSource(source), 1355 mDone(false), 1356 mPaused(false), 1357 mResumed(false), 1358 mStarted(false), 1359 mTrackId(trackId), 1360 mTrackDurationUs(0), 1361 mEstimatedTrackSizeBytes(0), 1362 mSamplesHaveSameSize(true), 1363 mStszTableEntries(new ListTableEntries<uint32_t>(1000, 1)), 1364 mStcoTableEntries(new ListTableEntries<uint32_t>(1000, 1)), 1365 mCo64TableEntries(new ListTableEntries<off64_t>(1000, 1)), 1366 mStscTableEntries(new ListTableEntries<uint32_t>(1000, 3)), 1367 mStssTableEntries(new ListTableEntries<uint32_t>(1000, 1)), 1368 mSttsTableEntries(new ListTableEntries<uint32_t>(1000, 2)), 1369 mCttsTableEntries(new ListTableEntries<uint32_t>(1000, 2)), 1370 mCodecSpecificData(NULL), 1371 mCodecSpecificDataSize(0), 1372 mGotAllCodecSpecificData(false), 1373 mReachedEOS(false), 1374 mRotation(0) { 1375 getCodecSpecificDataFromInputFormatIfPossible(); 1376 1377 const char *mime; 1378 mMeta->findCString(kKeyMIMEType, &mime); 1379 mIsAvc = !strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_AVC); 1380 mIsAudio = !strncasecmp(mime, "audio/", 6); 1381 mIsMPEG4 = !strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_MPEG4) || 1382 !strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_AAC); 1383 1384 setTimeScale(); 1385} 1386 1387void MPEG4Writer::Track::updateTrackSizeEstimate() { 1388 1389 uint32_t stcoBoxCount = (mOwner->use32BitFileOffset() 1390 ? mStcoTableEntries->count() 1391 : mCo64TableEntries->count()); 1392 int64_t stcoBoxSizeBytes = stcoBoxCount * 4; 1393 int64_t stszBoxSizeBytes = mSamplesHaveSameSize? 4: (mStszTableEntries->count() * 4); 1394 1395 mEstimatedTrackSizeBytes = mMdatSizeBytes; // media data size 1396 if (!mOwner->isFileStreamable()) { 1397 // Reserved free space is not large enough to hold 1398 // all meta data and thus wasted. 1399 mEstimatedTrackSizeBytes += mStscTableEntries->count() * 12 + // stsc box size 1400 mStssTableEntries->count() * 4 + // stss box size 1401 mSttsTableEntries->count() * 8 + // stts box size 1402 mCttsTableEntries->count() * 8 + // ctts box size 1403 stcoBoxSizeBytes + // stco box size 1404 stszBoxSizeBytes; // stsz box size 1405 } 1406} 1407 1408void MPEG4Writer::Track::addOneStscTableEntry( 1409 size_t chunkId, size_t sampleId) { 1410 1411 mStscTableEntries->add(htonl(chunkId)); 1412 mStscTableEntries->add(htonl(sampleId)); 1413 mStscTableEntries->add(htonl(1)); 1414} 1415 1416void MPEG4Writer::Track::addOneStssTableEntry(size_t sampleId) { 1417 mStssTableEntries->add(htonl(sampleId)); 1418} 1419 1420void MPEG4Writer::Track::addOneSttsTableEntry( 1421 size_t sampleCount, int32_t duration) { 1422 1423 if (duration == 0) { 1424 ALOGW("0-duration samples found: %zu", sampleCount); 1425 } 1426 mSttsTableEntries->add(htonl(sampleCount)); 1427 mSttsTableEntries->add(htonl(duration)); 1428} 1429 1430void MPEG4Writer::Track::addOneCttsTableEntry( 1431 size_t sampleCount, int32_t duration) { 1432 1433 if (mIsAudio) { 1434 return; 1435 } 1436 mCttsTableEntries->add(htonl(sampleCount)); 1437 mCttsTableEntries->add(htonl(duration)); 1438} 1439 1440void MPEG4Writer::Track::addChunkOffset(off64_t offset) { 1441 if (mOwner->use32BitFileOffset()) { 1442 uint32_t value = offset; 1443 mStcoTableEntries->add(htonl(value)); 1444 } else { 1445 mCo64TableEntries->add(hton64(offset)); 1446 } 1447} 1448 1449void MPEG4Writer::Track::setTimeScale() { 1450 ALOGV("setTimeScale"); 1451 // Default time scale 1452 mTimeScale = 90000; 1453 1454 if (mIsAudio) { 1455 // Use the sampling rate as the default time scale for audio track. 1456 int32_t sampleRate; 1457 bool success = mMeta->findInt32(kKeySampleRate, &sampleRate); 1458 CHECK(success); 1459 mTimeScale = sampleRate; 1460 } 1461 1462 // If someone would like to overwrite the timescale, use user-supplied value. 1463 int32_t timeScale; 1464 if (mMeta->findInt32(kKeyTimeScale, &timeScale)) { 1465 mTimeScale = timeScale; 1466 } 1467 1468 CHECK_GT(mTimeScale, 0); 1469} 1470 1471void MPEG4Writer::Track::getCodecSpecificDataFromInputFormatIfPossible() { 1472 const char *mime; 1473 CHECK(mMeta->findCString(kKeyMIMEType, &mime)); 1474 1475 if (!strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_AVC)) { 1476 uint32_t type; 1477 const void *data; 1478 size_t size; 1479 if (mMeta->findData(kKeyAVCC, &type, &data, &size)) { 1480 mCodecSpecificData = malloc(size); 1481 mCodecSpecificDataSize = size; 1482 memcpy(mCodecSpecificData, data, size); 1483 mGotAllCodecSpecificData = true; 1484 } 1485 } else if (!strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_MPEG4) 1486 || !strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_AAC)) { 1487 uint32_t type; 1488 const void *data; 1489 size_t size; 1490 if (mMeta->findData(kKeyESDS, &type, &data, &size)) { 1491 ESDS esds(data, size); 1492 if (esds.getCodecSpecificInfo(&data, &size) == OK) { 1493 mCodecSpecificData = malloc(size); 1494 mCodecSpecificDataSize = size; 1495 memcpy(mCodecSpecificData, data, size); 1496 mGotAllCodecSpecificData = true; 1497 } 1498 } 1499 } 1500} 1501 1502MPEG4Writer::Track::~Track() { 1503 stop(); 1504 1505 delete mStszTableEntries; 1506 delete mStcoTableEntries; 1507 delete mCo64TableEntries; 1508 delete mStscTableEntries; 1509 delete mSttsTableEntries; 1510 delete mStssTableEntries; 1511 delete mCttsTableEntries; 1512 1513 mStszTableEntries = NULL; 1514 mStcoTableEntries = NULL; 1515 mCo64TableEntries = NULL; 1516 mStscTableEntries = NULL; 1517 mSttsTableEntries = NULL; 1518 mStssTableEntries = NULL; 1519 mCttsTableEntries = NULL; 1520 1521 if (mCodecSpecificData != NULL) { 1522 free(mCodecSpecificData); 1523 mCodecSpecificData = NULL; 1524 } 1525} 1526 1527void MPEG4Writer::Track::initTrackingProgressStatus(MetaData *params) { 1528 ALOGV("initTrackingProgressStatus"); 1529 mPreviousTrackTimeUs = -1; 1530 mTrackingProgressStatus = false; 1531 mTrackEveryTimeDurationUs = 0; 1532 { 1533 int64_t timeUs; 1534 if (params && params->findInt64(kKeyTrackTimeStatus, &timeUs)) { 1535 ALOGV("Receive request to track progress status for every %" PRId64 " us", timeUs); 1536 mTrackEveryTimeDurationUs = timeUs; 1537 mTrackingProgressStatus = true; 1538 } 1539 } 1540} 1541 1542// static 1543void *MPEG4Writer::ThreadWrapper(void *me) { 1544 ALOGV("ThreadWrapper: %p", me); 1545 MPEG4Writer *writer = static_cast<MPEG4Writer *>(me); 1546 writer->threadFunc(); 1547 return NULL; 1548} 1549 1550void MPEG4Writer::bufferChunk(const Chunk& chunk) { 1551 ALOGV("bufferChunk: %p", chunk.mTrack); 1552 Mutex::Autolock autolock(mLock); 1553 CHECK_EQ(mDone, false); 1554 1555 for (List<ChunkInfo>::iterator it = mChunkInfos.begin(); 1556 it != mChunkInfos.end(); ++it) { 1557 1558 if (chunk.mTrack == it->mTrack) { // Found owner 1559 it->mChunks.push_back(chunk); 1560 mChunkReadyCondition.signal(); 1561 return; 1562 } 1563 } 1564 1565 CHECK(!"Received a chunk for a unknown track"); 1566} 1567 1568void MPEG4Writer::writeChunkToFile(Chunk* chunk) { 1569 ALOGV("writeChunkToFile: %" PRId64 " from %s track", 1570 chunk->mTimeStampUs, chunk->mTrack->isAudio()? "audio": "video"); 1571 1572 int32_t isFirstSample = true; 1573 while (!chunk->mSamples.empty()) { 1574 List<MediaBuffer *>::iterator it = chunk->mSamples.begin(); 1575 1576 off64_t offset = chunk->mTrack->isAvc() 1577 ? addLengthPrefixedSample_l(*it) 1578 : addSample_l(*it); 1579 1580 if (isFirstSample) { 1581 chunk->mTrack->addChunkOffset(offset); 1582 isFirstSample = false; 1583 } 1584 1585 (*it)->release(); 1586 (*it) = NULL; 1587 chunk->mSamples.erase(it); 1588 } 1589 chunk->mSamples.clear(); 1590} 1591 1592void MPEG4Writer::writeAllChunks() { 1593 ALOGV("writeAllChunks"); 1594 size_t outstandingChunks = 0; 1595 Chunk chunk; 1596 while (findChunkToWrite(&chunk)) { 1597 writeChunkToFile(&chunk); 1598 ++outstandingChunks; 1599 } 1600 1601 sendSessionSummary(); 1602 1603 mChunkInfos.clear(); 1604 ALOGD("%zu chunks are written in the last batch", outstandingChunks); 1605} 1606 1607bool MPEG4Writer::findChunkToWrite(Chunk *chunk) { 1608 ALOGV("findChunkToWrite"); 1609 1610 int64_t minTimestampUs = 0x7FFFFFFFFFFFFFFFLL; 1611 Track *track = NULL; 1612 for (List<ChunkInfo>::iterator it = mChunkInfos.begin(); 1613 it != mChunkInfos.end(); ++it) { 1614 if (!it->mChunks.empty()) { 1615 List<Chunk>::iterator chunkIt = it->mChunks.begin(); 1616 if (chunkIt->mTimeStampUs < minTimestampUs) { 1617 minTimestampUs = chunkIt->mTimeStampUs; 1618 track = it->mTrack; 1619 } 1620 } 1621 } 1622 1623 if (track == NULL) { 1624 ALOGV("Nothing to be written after all"); 1625 return false; 1626 } 1627 1628 if (mIsFirstChunk) { 1629 mIsFirstChunk = false; 1630 } 1631 1632 for (List<ChunkInfo>::iterator it = mChunkInfos.begin(); 1633 it != mChunkInfos.end(); ++it) { 1634 if (it->mTrack == track) { 1635 *chunk = *(it->mChunks.begin()); 1636 it->mChunks.erase(it->mChunks.begin()); 1637 CHECK_EQ(chunk->mTrack, track); 1638 1639 int64_t interChunkTimeUs = 1640 chunk->mTimeStampUs - it->mPrevChunkTimestampUs; 1641 if (interChunkTimeUs > it->mPrevChunkTimestampUs) { 1642 it->mMaxInterChunkDurUs = interChunkTimeUs; 1643 } 1644 1645 return true; 1646 } 1647 } 1648 1649 return false; 1650} 1651 1652void MPEG4Writer::threadFunc() { 1653 ALOGV("threadFunc"); 1654 1655 prctl(PR_SET_NAME, (unsigned long)"MPEG4Writer", 0, 0, 0); 1656 1657 Mutex::Autolock autoLock(mLock); 1658 while (!mDone) { 1659 Chunk chunk; 1660 bool chunkFound = false; 1661 1662 while (!mDone && !(chunkFound = findChunkToWrite(&chunk))) { 1663 mChunkReadyCondition.wait(mLock); 1664 } 1665 1666 // In real time recording mode, write without holding the lock in order 1667 // to reduce the blocking time for media track threads. 1668 // Otherwise, hold the lock until the existing chunks get written to the 1669 // file. 1670 if (chunkFound) { 1671 if (mIsRealTimeRecording) { 1672 mLock.unlock(); 1673 } 1674 writeChunkToFile(&chunk); 1675 if (mIsRealTimeRecording) { 1676 mLock.lock(); 1677 } 1678 } 1679 } 1680 1681 writeAllChunks(); 1682} 1683 1684status_t MPEG4Writer::startWriterThread() { 1685 ALOGV("startWriterThread"); 1686 1687 mDone = false; 1688 mIsFirstChunk = true; 1689 mDriftTimeUs = 0; 1690 for (List<Track *>::iterator it = mTracks.begin(); 1691 it != mTracks.end(); ++it) { 1692 ChunkInfo info; 1693 info.mTrack = *it; 1694 info.mPrevChunkTimestampUs = 0; 1695 info.mMaxInterChunkDurUs = 0; 1696 mChunkInfos.push_back(info); 1697 } 1698 1699 pthread_attr_t attr; 1700 pthread_attr_init(&attr); 1701 pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE); 1702 pthread_create(&mThread, &attr, ThreadWrapper, this); 1703 pthread_attr_destroy(&attr); 1704 mWriterThreadStarted = true; 1705 return OK; 1706} 1707 1708 1709status_t MPEG4Writer::Track::start(MetaData *params) { 1710 if (!mDone && mPaused) { 1711 mPaused = false; 1712 mResumed = true; 1713 return OK; 1714 } 1715 1716 int64_t startTimeUs; 1717 if (params == NULL || !params->findInt64(kKeyTime, &startTimeUs)) { 1718 startTimeUs = 0; 1719 } 1720 mStartTimeRealUs = startTimeUs; 1721 1722 int32_t rotationDegrees; 1723 if (!mIsAudio && params && params->findInt32(kKeyRotation, &rotationDegrees)) { 1724 mRotation = rotationDegrees; 1725 } 1726 1727 initTrackingProgressStatus(params); 1728 1729 sp<MetaData> meta = new MetaData; 1730 if (mOwner->isRealTimeRecording() && mOwner->numTracks() > 1) { 1731 /* 1732 * This extra delay of accepting incoming audio/video signals 1733 * helps to align a/v start time at the beginning of a recording 1734 * session, and it also helps eliminate the "recording" sound for 1735 * camcorder applications. 1736 * 1737 * If client does not set the start time offset, we fall back to 1738 * use the default initial delay value. 1739 */ 1740 int64_t startTimeOffsetUs = mOwner->getStartTimeOffsetMs() * 1000LL; 1741 if (startTimeOffsetUs < 0) { // Start time offset was not set 1742 startTimeOffsetUs = kInitialDelayTimeUs; 1743 } 1744 startTimeUs += startTimeOffsetUs; 1745 ALOGI("Start time offset: %" PRId64 " us", startTimeOffsetUs); 1746 } 1747 1748 meta->setInt64(kKeyTime, startTimeUs); 1749 1750 status_t err = mSource->start(meta.get()); 1751 if (err != OK) { 1752 mDone = mReachedEOS = true; 1753 return err; 1754 } 1755 1756 pthread_attr_t attr; 1757 pthread_attr_init(&attr); 1758 pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE); 1759 1760 mDone = false; 1761 mStarted = true; 1762 mTrackDurationUs = 0; 1763 mReachedEOS = false; 1764 mEstimatedTrackSizeBytes = 0; 1765 mMdatSizeBytes = 0; 1766 mMaxChunkDurationUs = 0; 1767 1768 pthread_create(&mThread, &attr, ThreadWrapper, this); 1769 pthread_attr_destroy(&attr); 1770 1771 return OK; 1772} 1773 1774status_t MPEG4Writer::Track::pause() { 1775 mPaused = true; 1776 return OK; 1777} 1778 1779status_t MPEG4Writer::Track::stop() { 1780 ALOGD("%s track stopping", mIsAudio? "Audio": "Video"); 1781 if (!mStarted) { 1782 ALOGE("Stop() called but track is not started"); 1783 return ERROR_END_OF_STREAM; 1784 } 1785 1786 if (mDone) { 1787 return OK; 1788 } 1789 mDone = true; 1790 1791 ALOGD("%s track source stopping", mIsAudio? "Audio": "Video"); 1792 mSource->stop(); 1793 ALOGD("%s track source stopped", mIsAudio? "Audio": "Video"); 1794 1795 void *dummy; 1796 pthread_join(mThread, &dummy); 1797 status_t err = static_cast<status_t>(reinterpret_cast<uintptr_t>(dummy)); 1798 1799 ALOGD("%s track stopped", mIsAudio? "Audio": "Video"); 1800 return err; 1801} 1802 1803bool MPEG4Writer::Track::reachedEOS() { 1804 return mReachedEOS; 1805} 1806 1807// static 1808void *MPEG4Writer::Track::ThreadWrapper(void *me) { 1809 Track *track = static_cast<Track *>(me); 1810 1811 status_t err = track->threadEntry(); 1812 return (void *)(uintptr_t)err; 1813} 1814 1815static void getNalUnitType(uint8_t byte, uint8_t* type) { 1816 ALOGV("getNalUnitType: %d", byte); 1817 1818 // nal_unit_type: 5-bit unsigned integer 1819 *type = (byte & 0x1F); 1820} 1821 1822static const uint8_t *findNextStartCode( 1823 const uint8_t *data, size_t length) { 1824 1825 ALOGV("findNextStartCode: %p %zu", data, length); 1826 1827 size_t bytesLeft = length; 1828 while (bytesLeft > 4 && 1829 memcmp("\x00\x00\x00\x01", &data[length - bytesLeft], 4)) { 1830 --bytesLeft; 1831 } 1832 if (bytesLeft <= 4) { 1833 bytesLeft = 0; // Last parameter set 1834 } 1835 return &data[length - bytesLeft]; 1836} 1837 1838const uint8_t *MPEG4Writer::Track::parseParamSet( 1839 const uint8_t *data, size_t length, int type, size_t *paramSetLen) { 1840 1841 ALOGV("parseParamSet"); 1842 CHECK(type == kNalUnitTypeSeqParamSet || 1843 type == kNalUnitTypePicParamSet); 1844 1845 const uint8_t *nextStartCode = findNextStartCode(data, length); 1846 *paramSetLen = nextStartCode - data; 1847 if (*paramSetLen == 0) { 1848 ALOGE("Param set is malformed, since its length is 0"); 1849 return NULL; 1850 } 1851 1852 AVCParamSet paramSet(*paramSetLen, data); 1853 if (type == kNalUnitTypeSeqParamSet) { 1854 if (*paramSetLen < 4) { 1855 ALOGE("Seq parameter set malformed"); 1856 return NULL; 1857 } 1858 if (mSeqParamSets.empty()) { 1859 mProfileIdc = data[1]; 1860 mProfileCompatible = data[2]; 1861 mLevelIdc = data[3]; 1862 } else { 1863 if (mProfileIdc != data[1] || 1864 mProfileCompatible != data[2] || 1865 mLevelIdc != data[3]) { 1866 ALOGE("Inconsistent profile/level found in seq parameter sets"); 1867 return NULL; 1868 } 1869 } 1870 mSeqParamSets.push_back(paramSet); 1871 } else { 1872 mPicParamSets.push_back(paramSet); 1873 } 1874 return nextStartCode; 1875} 1876 1877status_t MPEG4Writer::Track::copyAVCCodecSpecificData( 1878 const uint8_t *data, size_t size) { 1879 ALOGV("copyAVCCodecSpecificData"); 1880 1881 // 2 bytes for each of the parameter set length field 1882 // plus the 7 bytes for the header 1883 if (size < 4 + 7) { 1884 ALOGE("Codec specific data length too short: %zu", size); 1885 return ERROR_MALFORMED; 1886 } 1887 1888 mCodecSpecificDataSize = size; 1889 mCodecSpecificData = malloc(size); 1890 memcpy(mCodecSpecificData, data, size); 1891 return OK; 1892} 1893 1894status_t MPEG4Writer::Track::parseAVCCodecSpecificData( 1895 const uint8_t *data, size_t size) { 1896 1897 ALOGV("parseAVCCodecSpecificData"); 1898 // Data starts with a start code. 1899 // SPS and PPS are separated with start codes. 1900 // Also, SPS must come before PPS 1901 uint8_t type = kNalUnitTypeSeqParamSet; 1902 bool gotSps = false; 1903 bool gotPps = false; 1904 const uint8_t *tmp = data; 1905 const uint8_t *nextStartCode = data; 1906 size_t bytesLeft = size; 1907 size_t paramSetLen = 0; 1908 mCodecSpecificDataSize = 0; 1909 while (bytesLeft > 4 && !memcmp("\x00\x00\x00\x01", tmp, 4)) { 1910 getNalUnitType(*(tmp + 4), &type); 1911 if (type == kNalUnitTypeSeqParamSet) { 1912 if (gotPps) { 1913 ALOGE("SPS must come before PPS"); 1914 return ERROR_MALFORMED; 1915 } 1916 if (!gotSps) { 1917 gotSps = true; 1918 } 1919 nextStartCode = parseParamSet(tmp + 4, bytesLeft - 4, type, ¶mSetLen); 1920 } else if (type == kNalUnitTypePicParamSet) { 1921 if (!gotSps) { 1922 ALOGE("SPS must come before PPS"); 1923 return ERROR_MALFORMED; 1924 } 1925 if (!gotPps) { 1926 gotPps = true; 1927 } 1928 nextStartCode = parseParamSet(tmp + 4, bytesLeft - 4, type, ¶mSetLen); 1929 } else { 1930 ALOGE("Only SPS and PPS Nal units are expected"); 1931 return ERROR_MALFORMED; 1932 } 1933 1934 if (nextStartCode == NULL) { 1935 return ERROR_MALFORMED; 1936 } 1937 1938 // Move on to find the next parameter set 1939 bytesLeft -= nextStartCode - tmp; 1940 tmp = nextStartCode; 1941 mCodecSpecificDataSize += (2 + paramSetLen); 1942 } 1943 1944 { 1945 // Check on the number of seq parameter sets 1946 size_t nSeqParamSets = mSeqParamSets.size(); 1947 if (nSeqParamSets == 0) { 1948 ALOGE("Cound not find sequence parameter set"); 1949 return ERROR_MALFORMED; 1950 } 1951 1952 if (nSeqParamSets > 0x1F) { 1953 ALOGE("Too many seq parameter sets (%zu) found", nSeqParamSets); 1954 return ERROR_MALFORMED; 1955 } 1956 } 1957 1958 { 1959 // Check on the number of pic parameter sets 1960 size_t nPicParamSets = mPicParamSets.size(); 1961 if (nPicParamSets == 0) { 1962 ALOGE("Cound not find picture parameter set"); 1963 return ERROR_MALFORMED; 1964 } 1965 if (nPicParamSets > 0xFF) { 1966 ALOGE("Too many pic parameter sets (%zd) found", nPicParamSets); 1967 return ERROR_MALFORMED; 1968 } 1969 } 1970// FIXME: 1971// Add chromat_format_idc, bit depth values, etc for AVC/h264 high profile and above 1972// and remove #if 0 1973#if 0 1974 { 1975 // Check on the profiles 1976 // These profiles requires additional parameter set extensions 1977 if (mProfileIdc == 100 || mProfileIdc == 110 || 1978 mProfileIdc == 122 || mProfileIdc == 144) { 1979 ALOGE("Sorry, no support for profile_idc: %d!", mProfileIdc); 1980 return BAD_VALUE; 1981 } 1982 } 1983#endif 1984 return OK; 1985} 1986 1987status_t MPEG4Writer::Track::makeAVCCodecSpecificData( 1988 const uint8_t *data, size_t size) { 1989 1990 if (mCodecSpecificData != NULL) { 1991 ALOGE("Already have codec specific data"); 1992 return ERROR_MALFORMED; 1993 } 1994 1995 if (size < 4) { 1996 ALOGE("Codec specific data length too short: %zu", size); 1997 return ERROR_MALFORMED; 1998 } 1999 2000 // Data is in the form of AVCCodecSpecificData 2001 if (memcmp("\x00\x00\x00\x01", data, 4)) { 2002 return copyAVCCodecSpecificData(data, size); 2003 } 2004 2005 if (parseAVCCodecSpecificData(data, size) != OK) { 2006 return ERROR_MALFORMED; 2007 } 2008 2009 // ISO 14496-15: AVC file format 2010 mCodecSpecificDataSize += 7; // 7 more bytes in the header 2011 mCodecSpecificData = malloc(mCodecSpecificDataSize); 2012 uint8_t *header = (uint8_t *)mCodecSpecificData; 2013 header[0] = 1; // version 2014 header[1] = mProfileIdc; // profile indication 2015 header[2] = mProfileCompatible; // profile compatibility 2016 header[3] = mLevelIdc; 2017 2018 // 6-bit '111111' followed by 2-bit to lengthSizeMinuusOne 2019 if (mOwner->useNalLengthFour()) { 2020 header[4] = 0xfc | 3; // length size == 4 bytes 2021 } else { 2022 header[4] = 0xfc | 1; // length size == 2 bytes 2023 } 2024 2025 // 3-bit '111' followed by 5-bit numSequenceParameterSets 2026 int nSequenceParamSets = mSeqParamSets.size(); 2027 header[5] = 0xe0 | nSequenceParamSets; 2028 header += 6; 2029 for (List<AVCParamSet>::iterator it = mSeqParamSets.begin(); 2030 it != mSeqParamSets.end(); ++it) { 2031 // 16-bit sequence parameter set length 2032 uint16_t seqParamSetLength = it->mLength; 2033 header[0] = seqParamSetLength >> 8; 2034 header[1] = seqParamSetLength & 0xff; 2035 2036 // SPS NAL unit (sequence parameter length bytes) 2037 memcpy(&header[2], it->mData, seqParamSetLength); 2038 header += (2 + seqParamSetLength); 2039 } 2040 2041 // 8-bit nPictureParameterSets 2042 int nPictureParamSets = mPicParamSets.size(); 2043 header[0] = nPictureParamSets; 2044 header += 1; 2045 for (List<AVCParamSet>::iterator it = mPicParamSets.begin(); 2046 it != mPicParamSets.end(); ++it) { 2047 // 16-bit picture parameter set length 2048 uint16_t picParamSetLength = it->mLength; 2049 header[0] = picParamSetLength >> 8; 2050 header[1] = picParamSetLength & 0xff; 2051 2052 // PPS Nal unit (picture parameter set length bytes) 2053 memcpy(&header[2], it->mData, picParamSetLength); 2054 header += (2 + picParamSetLength); 2055 } 2056 2057 return OK; 2058} 2059 2060/* 2061 * Updates the drift time from the audio track so that 2062 * the video track can get the updated drift time information 2063 * from the file writer. The fluctuation of the drift time of the audio 2064 * encoding path is smoothed out with a simple filter by giving a larger 2065 * weight to more recently drift time. The filter coefficients, 0.5 and 0.5, 2066 * are heuristically determined. 2067 */ 2068void MPEG4Writer::Track::updateDriftTime(const sp<MetaData>& meta) { 2069 int64_t driftTimeUs = 0; 2070 if (meta->findInt64(kKeyDriftTime, &driftTimeUs)) { 2071 int64_t prevDriftTimeUs = mOwner->getDriftTimeUs(); 2072 int64_t timeUs = (driftTimeUs + prevDriftTimeUs) >> 1; 2073 mOwner->setDriftTimeUs(timeUs); 2074 } 2075} 2076 2077status_t MPEG4Writer::Track::threadEntry() { 2078 int32_t count = 0; 2079 const int64_t interleaveDurationUs = mOwner->interleaveDuration(); 2080 const bool hasMultipleTracks = (mOwner->numTracks() > 1); 2081 int64_t chunkTimestampUs = 0; 2082 int32_t nChunks = 0; 2083 int32_t nZeroLengthFrames = 0; 2084 int64_t lastTimestampUs = 0; // Previous sample time stamp 2085 int64_t lastDurationUs = 0; // Between the previous two samples 2086 int64_t currDurationTicks = 0; // Timescale based ticks 2087 int64_t lastDurationTicks = 0; // Timescale based ticks 2088 int32_t sampleCount = 1; // Sample count in the current stts table entry 2089 uint32_t previousSampleSize = 0; // Size of the previous sample 2090 int64_t previousPausedDurationUs = 0; 2091 int64_t timestampUs = 0; 2092 int64_t cttsOffsetTimeUs = 0; 2093 int64_t currCttsOffsetTimeTicks = 0; // Timescale based ticks 2094 int64_t lastCttsOffsetTimeTicks = -1; // Timescale based ticks 2095 int32_t cttsSampleCount = 0; // Sample count in the current ctts table entry 2096 uint32_t lastSamplesPerChunk = 0; 2097 2098 if (mIsAudio) { 2099 prctl(PR_SET_NAME, (unsigned long)"AudioTrackEncoding", 0, 0, 0); 2100 } else { 2101 prctl(PR_SET_NAME, (unsigned long)"VideoTrackEncoding", 0, 0, 0); 2102 } 2103 2104 if (mOwner->isRealTimeRecording()) { 2105 androidSetThreadPriority(0, ANDROID_PRIORITY_AUDIO); 2106 } 2107 2108 sp<MetaData> meta_data; 2109 2110 status_t err = OK; 2111 MediaBuffer *buffer; 2112 const char *trackName = mIsAudio ? "Audio" : "Video"; 2113 while (!mDone && (err = mSource->read(&buffer)) == OK) { 2114 if (buffer->range_length() == 0) { 2115 buffer->release(); 2116 buffer = NULL; 2117 ++nZeroLengthFrames; 2118 continue; 2119 } 2120 2121 // If the codec specific data has not been received yet, delay pause. 2122 // After the codec specific data is received, discard what we received 2123 // when the track is to be paused. 2124 if (mPaused && !mResumed) { 2125 buffer->release(); 2126 buffer = NULL; 2127 continue; 2128 } 2129 2130 ++count; 2131 2132 int32_t isCodecConfig; 2133 if (buffer->meta_data()->findInt32(kKeyIsCodecConfig, &isCodecConfig) 2134 && isCodecConfig) { 2135 CHECK(!mGotAllCodecSpecificData); 2136 2137 if (mIsAvc) { 2138 status_t err = makeAVCCodecSpecificData( 2139 (const uint8_t *)buffer->data() 2140 + buffer->range_offset(), 2141 buffer->range_length()); 2142 CHECK_EQ((status_t)OK, err); 2143 } else if (mIsMPEG4) { 2144 mCodecSpecificDataSize = buffer->range_length(); 2145 mCodecSpecificData = malloc(mCodecSpecificDataSize); 2146 memcpy(mCodecSpecificData, 2147 (const uint8_t *)buffer->data() 2148 + buffer->range_offset(), 2149 buffer->range_length()); 2150 } 2151 2152 buffer->release(); 2153 buffer = NULL; 2154 2155 mGotAllCodecSpecificData = true; 2156 continue; 2157 } 2158 2159 // Make a deep copy of the MediaBuffer and Metadata and release 2160 // the original as soon as we can 2161 MediaBuffer *copy = new MediaBuffer(buffer->range_length()); 2162 memcpy(copy->data(), (uint8_t *)buffer->data() + buffer->range_offset(), 2163 buffer->range_length()); 2164 copy->set_range(0, buffer->range_length()); 2165 meta_data = new MetaData(*buffer->meta_data().get()); 2166 buffer->release(); 2167 buffer = NULL; 2168 2169 if (mIsAvc) StripStartcode(copy); 2170 2171 size_t sampleSize = copy->range_length(); 2172 if (mIsAvc) { 2173 if (mOwner->useNalLengthFour()) { 2174 sampleSize += 4; 2175 } else { 2176 sampleSize += 2; 2177 } 2178 } 2179 2180 // Max file size or duration handling 2181 mMdatSizeBytes += sampleSize; 2182 updateTrackSizeEstimate(); 2183 2184 if (mOwner->exceedsFileSizeLimit()) { 2185 mOwner->notify(MEDIA_RECORDER_EVENT_INFO, MEDIA_RECORDER_INFO_MAX_FILESIZE_REACHED, 0); 2186 break; 2187 } 2188 if (mOwner->exceedsFileDurationLimit()) { 2189 mOwner->notify(MEDIA_RECORDER_EVENT_INFO, MEDIA_RECORDER_INFO_MAX_DURATION_REACHED, 0); 2190 break; 2191 } 2192 2193 2194 int32_t isSync = false; 2195 meta_data->findInt32(kKeyIsSyncFrame, &isSync); 2196 CHECK(meta_data->findInt64(kKeyTime, ×tampUs)); 2197 2198//////////////////////////////////////////////////////////////////////////////// 2199 if (mStszTableEntries->count() == 0) { 2200 mFirstSampleTimeRealUs = systemTime() / 1000; 2201 mStartTimestampUs = timestampUs; 2202 mOwner->setStartTimestampUs(mStartTimestampUs); 2203 previousPausedDurationUs = mStartTimestampUs; 2204 } 2205 2206 if (mResumed) { 2207 int64_t durExcludingEarlierPausesUs = timestampUs - previousPausedDurationUs; 2208 if (WARN_UNLESS(durExcludingEarlierPausesUs >= 0ll, "for %s track", trackName)) { 2209 copy->release(); 2210 return ERROR_MALFORMED; 2211 } 2212 2213 int64_t pausedDurationUs = durExcludingEarlierPausesUs - mTrackDurationUs; 2214 if (WARN_UNLESS(pausedDurationUs >= lastDurationUs, "for %s track", trackName)) { 2215 copy->release(); 2216 return ERROR_MALFORMED; 2217 } 2218 2219 previousPausedDurationUs += pausedDurationUs - lastDurationUs; 2220 mResumed = false; 2221 } 2222 2223 timestampUs -= previousPausedDurationUs; 2224 if (WARN_UNLESS(timestampUs >= 0ll, "for %s track", trackName)) { 2225 copy->release(); 2226 return ERROR_MALFORMED; 2227 } 2228 2229 if (!mIsAudio) { 2230 /* 2231 * Composition time: timestampUs 2232 * Decoding time: decodingTimeUs 2233 * Composition time offset = composition time - decoding time 2234 */ 2235 int64_t decodingTimeUs; 2236 CHECK(meta_data->findInt64(kKeyDecodingTime, &decodingTimeUs)); 2237 decodingTimeUs -= previousPausedDurationUs; 2238 cttsOffsetTimeUs = 2239 timestampUs + kMaxCttsOffsetTimeUs - decodingTimeUs; 2240 if (WARN_UNLESS(cttsOffsetTimeUs >= 0ll, "for %s track", trackName)) { 2241 copy->release(); 2242 return ERROR_MALFORMED; 2243 } 2244 2245 timestampUs = decodingTimeUs; 2246 ALOGV("decoding time: %" PRId64 " and ctts offset time: %" PRId64, 2247 timestampUs, cttsOffsetTimeUs); 2248 2249 // Update ctts box table if necessary 2250 currCttsOffsetTimeTicks = 2251 (cttsOffsetTimeUs * mTimeScale + 500000LL) / 1000000LL; 2252 if (WARN_UNLESS(currCttsOffsetTimeTicks <= 0x0FFFFFFFFLL, "for %s track", trackName)) { 2253 copy->release(); 2254 return ERROR_MALFORMED; 2255 } 2256 2257 if (mStszTableEntries->count() == 0) { 2258 // Force the first ctts table entry to have one single entry 2259 // so that we can do adjustment for the initial track start 2260 // time offset easily in writeCttsBox(). 2261 lastCttsOffsetTimeTicks = currCttsOffsetTimeTicks; 2262 addOneCttsTableEntry(1, currCttsOffsetTimeTicks); 2263 cttsSampleCount = 0; // No sample in ctts box is pending 2264 } else { 2265 if (currCttsOffsetTimeTicks != lastCttsOffsetTimeTicks) { 2266 addOneCttsTableEntry(cttsSampleCount, lastCttsOffsetTimeTicks); 2267 lastCttsOffsetTimeTicks = currCttsOffsetTimeTicks; 2268 cttsSampleCount = 1; // One sample in ctts box is pending 2269 } else { 2270 ++cttsSampleCount; 2271 } 2272 } 2273 2274 // Update ctts time offset range 2275 if (mStszTableEntries->count() == 0) { 2276 mMinCttsOffsetTimeUs = currCttsOffsetTimeTicks; 2277 mMaxCttsOffsetTimeUs = currCttsOffsetTimeTicks; 2278 } else { 2279 if (currCttsOffsetTimeTicks > mMaxCttsOffsetTimeUs) { 2280 mMaxCttsOffsetTimeUs = currCttsOffsetTimeTicks; 2281 } else if (currCttsOffsetTimeTicks < mMinCttsOffsetTimeUs) { 2282 mMinCttsOffsetTimeUs = currCttsOffsetTimeTicks; 2283 } 2284 } 2285 2286 } 2287 2288 if (mOwner->isRealTimeRecording()) { 2289 if (mIsAudio) { 2290 updateDriftTime(meta_data); 2291 } 2292 } 2293 2294 if (WARN_UNLESS(timestampUs >= 0ll, "for %s track", trackName)) { 2295 copy->release(); 2296 return ERROR_MALFORMED; 2297 } 2298 2299 ALOGV("%s media time stamp: %" PRId64 " and previous paused duration %" PRId64, 2300 trackName, timestampUs, previousPausedDurationUs); 2301 if (timestampUs > mTrackDurationUs) { 2302 mTrackDurationUs = timestampUs; 2303 } 2304 2305 // We need to use the time scale based ticks, rather than the 2306 // timestamp itself to determine whether we have to use a new 2307 // stts entry, since we may have rounding errors. 2308 // The calculation is intended to reduce the accumulated 2309 // rounding errors. 2310 currDurationTicks = 2311 ((timestampUs * mTimeScale + 500000LL) / 1000000LL - 2312 (lastTimestampUs * mTimeScale + 500000LL) / 1000000LL); 2313 if (currDurationTicks < 0ll) { 2314 ALOGE("timestampUs %" PRId64 " < lastTimestampUs %" PRId64 " for %s track", 2315 timestampUs, lastTimestampUs, trackName); 2316 copy->release(); 2317 return UNKNOWN_ERROR; 2318 } 2319 2320 // if the duration is different for this sample, see if it is close enough to the previous 2321 // duration that we can fudge it and use the same value, to avoid filling the stts table 2322 // with lots of near-identical entries. 2323 // "close enough" here means that the current duration needs to be adjusted by less 2324 // than 0.1 milliseconds 2325 if (lastDurationTicks && (currDurationTicks != lastDurationTicks)) { 2326 int64_t deltaUs = ((lastDurationTicks - currDurationTicks) * 1000000LL 2327 + (mTimeScale / 2)) / mTimeScale; 2328 if (deltaUs > -100 && deltaUs < 100) { 2329 // use previous ticks, and adjust timestamp as if it was actually that number 2330 // of ticks 2331 currDurationTicks = lastDurationTicks; 2332 timestampUs += deltaUs; 2333 } 2334 } 2335 2336 mStszTableEntries->add(htonl(sampleSize)); 2337 if (mStszTableEntries->count() > 2) { 2338 2339 // Force the first sample to have its own stts entry so that 2340 // we can adjust its value later to maintain the A/V sync. 2341 if (mStszTableEntries->count() == 3 || currDurationTicks != lastDurationTicks) { 2342 addOneSttsTableEntry(sampleCount, lastDurationTicks); 2343 sampleCount = 1; 2344 } else { 2345 ++sampleCount; 2346 } 2347 2348 } 2349 if (mSamplesHaveSameSize) { 2350 if (mStszTableEntries->count() >= 2 && previousSampleSize != sampleSize) { 2351 mSamplesHaveSameSize = false; 2352 } 2353 previousSampleSize = sampleSize; 2354 } 2355 ALOGV("%s timestampUs/lastTimestampUs: %" PRId64 "/%" PRId64, 2356 trackName, timestampUs, lastTimestampUs); 2357 lastDurationUs = timestampUs - lastTimestampUs; 2358 lastDurationTicks = currDurationTicks; 2359 lastTimestampUs = timestampUs; 2360 2361 if (isSync != 0) { 2362 addOneStssTableEntry(mStszTableEntries->count()); 2363 } 2364 2365 if (mTrackingProgressStatus) { 2366 if (mPreviousTrackTimeUs <= 0) { 2367 mPreviousTrackTimeUs = mStartTimestampUs; 2368 } 2369 trackProgressStatus(timestampUs); 2370 } 2371 if (!hasMultipleTracks) { 2372 off64_t offset = mIsAvc? mOwner->addLengthPrefixedSample_l(copy) 2373 : mOwner->addSample_l(copy); 2374 2375 uint32_t count = (mOwner->use32BitFileOffset() 2376 ? mStcoTableEntries->count() 2377 : mCo64TableEntries->count()); 2378 2379 if (count == 0) { 2380 addChunkOffset(offset); 2381 } 2382 copy->release(); 2383 copy = NULL; 2384 continue; 2385 } 2386 2387 mChunkSamples.push_back(copy); 2388 if (interleaveDurationUs == 0) { 2389 addOneStscTableEntry(++nChunks, 1); 2390 bufferChunk(timestampUs); 2391 } else { 2392 if (chunkTimestampUs == 0) { 2393 chunkTimestampUs = timestampUs; 2394 } else { 2395 int64_t chunkDurationUs = timestampUs - chunkTimestampUs; 2396 if (chunkDurationUs > interleaveDurationUs) { 2397 if (chunkDurationUs > mMaxChunkDurationUs) { 2398 mMaxChunkDurationUs = chunkDurationUs; 2399 } 2400 ++nChunks; 2401 if (nChunks == 1 || // First chunk 2402 lastSamplesPerChunk != mChunkSamples.size()) { 2403 lastSamplesPerChunk = mChunkSamples.size(); 2404 addOneStscTableEntry(nChunks, lastSamplesPerChunk); 2405 } 2406 bufferChunk(timestampUs); 2407 chunkTimestampUs = timestampUs; 2408 } 2409 } 2410 } 2411 2412 } 2413 2414 if (isTrackMalFormed()) { 2415 err = ERROR_MALFORMED; 2416 } 2417 2418 mOwner->trackProgressStatus(mTrackId, -1, err); 2419 2420 // Last chunk 2421 if (!hasMultipleTracks) { 2422 addOneStscTableEntry(1, mStszTableEntries->count()); 2423 } else if (!mChunkSamples.empty()) { 2424 addOneStscTableEntry(++nChunks, mChunkSamples.size()); 2425 bufferChunk(timestampUs); 2426 } 2427 2428 // We don't really know how long the last frame lasts, since 2429 // there is no frame time after it, just repeat the previous 2430 // frame's duration. 2431 if (mStszTableEntries->count() == 1) { 2432 lastDurationUs = 0; // A single sample's duration 2433 lastDurationTicks = 0; 2434 } else { 2435 ++sampleCount; // Count for the last sample 2436 } 2437 2438 if (mStszTableEntries->count() <= 2) { 2439 addOneSttsTableEntry(1, lastDurationTicks); 2440 if (sampleCount - 1 > 0) { 2441 addOneSttsTableEntry(sampleCount - 1, lastDurationTicks); 2442 } 2443 } else { 2444 addOneSttsTableEntry(sampleCount, lastDurationTicks); 2445 } 2446 2447 // The last ctts box may not have been written yet, and this 2448 // is to make sure that we write out the last ctts box. 2449 if (currCttsOffsetTimeTicks == lastCttsOffsetTimeTicks) { 2450 if (cttsSampleCount > 0) { 2451 addOneCttsTableEntry(cttsSampleCount, lastCttsOffsetTimeTicks); 2452 } 2453 } 2454 2455 mTrackDurationUs += lastDurationUs; 2456 mReachedEOS = true; 2457 2458 sendTrackSummary(hasMultipleTracks); 2459 2460 ALOGI("Received total/0-length (%d/%d) buffers and encoded %d frames. - %s", 2461 count, nZeroLengthFrames, mStszTableEntries->count(), trackName); 2462 if (mIsAudio) { 2463 ALOGI("Audio track drift time: %" PRId64 " us", mOwner->getDriftTimeUs()); 2464 } 2465 2466 if (err == ERROR_END_OF_STREAM) { 2467 return OK; 2468 } 2469 return err; 2470} 2471 2472bool MPEG4Writer::Track::isTrackMalFormed() const { 2473 if (mStszTableEntries->count() == 0) { // no samples written 2474 ALOGE("The number of recorded samples is 0"); 2475 return true; 2476 } 2477 2478 if (!mIsAudio && mStssTableEntries->count() == 0) { // no sync frames for video 2479 ALOGE("There are no sync frames for video track"); 2480 return true; 2481 } 2482 2483 if (OK != checkCodecSpecificData()) { // no codec specific data 2484 return true; 2485 } 2486 2487 return false; 2488} 2489 2490void MPEG4Writer::Track::sendTrackSummary(bool hasMultipleTracks) { 2491 2492 // Send track summary only if test mode is enabled. 2493 if (!isTestModeEnabled()) { 2494 return; 2495 } 2496 2497 int trackNum = (mTrackId << 28); 2498 2499 mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2500 trackNum | MEDIA_RECORDER_TRACK_INFO_TYPE, 2501 mIsAudio? 0: 1); 2502 2503 mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2504 trackNum | MEDIA_RECORDER_TRACK_INFO_DURATION_MS, 2505 mTrackDurationUs / 1000); 2506 2507 mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2508 trackNum | MEDIA_RECORDER_TRACK_INFO_ENCODED_FRAMES, 2509 mStszTableEntries->count()); 2510 2511 { 2512 // The system delay time excluding the requested initial delay that 2513 // is used to eliminate the recording sound. 2514 int64_t startTimeOffsetUs = mOwner->getStartTimeOffsetMs() * 1000LL; 2515 if (startTimeOffsetUs < 0) { // Start time offset was not set 2516 startTimeOffsetUs = kInitialDelayTimeUs; 2517 } 2518 int64_t initialDelayUs = 2519 mFirstSampleTimeRealUs - mStartTimeRealUs - startTimeOffsetUs; 2520 2521 mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2522 trackNum | MEDIA_RECORDER_TRACK_INFO_INITIAL_DELAY_MS, 2523 (initialDelayUs) / 1000); 2524 } 2525 2526 mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2527 trackNum | MEDIA_RECORDER_TRACK_INFO_DATA_KBYTES, 2528 mMdatSizeBytes / 1024); 2529 2530 if (hasMultipleTracks) { 2531 mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2532 trackNum | MEDIA_RECORDER_TRACK_INFO_MAX_CHUNK_DUR_MS, 2533 mMaxChunkDurationUs / 1000); 2534 2535 int64_t moovStartTimeUs = mOwner->getStartTimestampUs(); 2536 if (mStartTimestampUs != moovStartTimeUs) { 2537 int64_t startTimeOffsetUs = mStartTimestampUs - moovStartTimeUs; 2538 mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2539 trackNum | MEDIA_RECORDER_TRACK_INFO_START_OFFSET_MS, 2540 startTimeOffsetUs / 1000); 2541 } 2542 } 2543} 2544 2545void MPEG4Writer::Track::trackProgressStatus(int64_t timeUs, status_t err) { 2546 ALOGV("trackProgressStatus: %" PRId64 " us", timeUs); 2547 2548 if (mTrackEveryTimeDurationUs > 0 && 2549 timeUs - mPreviousTrackTimeUs >= mTrackEveryTimeDurationUs) { 2550 ALOGV("Fire time tracking progress status at %" PRId64 " us", timeUs); 2551 mOwner->trackProgressStatus(mTrackId, timeUs - mPreviousTrackTimeUs, err); 2552 mPreviousTrackTimeUs = timeUs; 2553 } 2554} 2555 2556void MPEG4Writer::trackProgressStatus( 2557 size_t trackId, int64_t timeUs, status_t err) { 2558 Mutex::Autolock lock(mLock); 2559 int32_t trackNum = (trackId << 28); 2560 2561 // Error notification 2562 // Do not consider ERROR_END_OF_STREAM an error 2563 if (err != OK && err != ERROR_END_OF_STREAM) { 2564 notify(MEDIA_RECORDER_TRACK_EVENT_ERROR, 2565 trackNum | MEDIA_RECORDER_TRACK_ERROR_GENERAL, 2566 err); 2567 return; 2568 } 2569 2570 if (timeUs == -1) { 2571 // Send completion notification 2572 notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2573 trackNum | MEDIA_RECORDER_TRACK_INFO_COMPLETION_STATUS, 2574 err); 2575 } else { 2576 // Send progress status 2577 notify(MEDIA_RECORDER_TRACK_EVENT_INFO, 2578 trackNum | MEDIA_RECORDER_TRACK_INFO_PROGRESS_IN_TIME, 2579 timeUs / 1000); 2580 } 2581} 2582 2583void MPEG4Writer::setDriftTimeUs(int64_t driftTimeUs) { 2584 ALOGV("setDriftTimeUs: %" PRId64 " us", driftTimeUs); 2585 Mutex::Autolock autolock(mLock); 2586 mDriftTimeUs = driftTimeUs; 2587} 2588 2589int64_t MPEG4Writer::getDriftTimeUs() { 2590 ALOGV("getDriftTimeUs: %" PRId64 " us", mDriftTimeUs); 2591 Mutex::Autolock autolock(mLock); 2592 return mDriftTimeUs; 2593} 2594 2595bool MPEG4Writer::isRealTimeRecording() const { 2596 return mIsRealTimeRecording; 2597} 2598 2599bool MPEG4Writer::useNalLengthFour() { 2600 return mUse4ByteNalLength; 2601} 2602 2603void MPEG4Writer::Track::bufferChunk(int64_t timestampUs) { 2604 ALOGV("bufferChunk"); 2605 2606 Chunk chunk(this, timestampUs, mChunkSamples); 2607 mOwner->bufferChunk(chunk); 2608 mChunkSamples.clear(); 2609} 2610 2611int64_t MPEG4Writer::Track::getDurationUs() const { 2612 return mTrackDurationUs; 2613} 2614 2615int64_t MPEG4Writer::Track::getEstimatedTrackSizeBytes() const { 2616 return mEstimatedTrackSizeBytes; 2617} 2618 2619status_t MPEG4Writer::Track::checkCodecSpecificData() const { 2620 const char *mime; 2621 CHECK(mMeta->findCString(kKeyMIMEType, &mime)); 2622 if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AAC, mime) || 2623 !strcasecmp(MEDIA_MIMETYPE_VIDEO_MPEG4, mime) || 2624 !strcasecmp(MEDIA_MIMETYPE_VIDEO_AVC, mime)) { 2625 if (!mCodecSpecificData || 2626 mCodecSpecificDataSize <= 0) { 2627 ALOGE("Missing codec specific data"); 2628 return ERROR_MALFORMED; 2629 } 2630 } else { 2631 if (mCodecSpecificData || 2632 mCodecSpecificDataSize > 0) { 2633 ALOGE("Unexepected codec specific data found"); 2634 return ERROR_MALFORMED; 2635 } 2636 } 2637 return OK; 2638} 2639 2640void MPEG4Writer::Track::writeTrackHeader(bool use32BitOffset) { 2641 2642 ALOGV("%s track time scale: %d", 2643 mIsAudio? "Audio": "Video", mTimeScale); 2644 2645 uint32_t now = getMpeg4Time(); 2646 mOwner->beginBox("trak"); 2647 writeTkhdBox(now); 2648 mOwner->beginBox("mdia"); 2649 writeMdhdBox(now); 2650 writeHdlrBox(); 2651 mOwner->beginBox("minf"); 2652 if (mIsAudio) { 2653 writeSmhdBox(); 2654 } else { 2655 writeVmhdBox(); 2656 } 2657 writeDinfBox(); 2658 writeStblBox(use32BitOffset); 2659 mOwner->endBox(); // minf 2660 mOwner->endBox(); // mdia 2661 mOwner->endBox(); // trak 2662} 2663 2664void MPEG4Writer::Track::writeStblBox(bool use32BitOffset) { 2665 mOwner->beginBox("stbl"); 2666 mOwner->beginBox("stsd"); 2667 mOwner->writeInt32(0); // version=0, flags=0 2668 mOwner->writeInt32(1); // entry count 2669 if (mIsAudio) { 2670 writeAudioFourCCBox(); 2671 } else { 2672 writeVideoFourCCBox(); 2673 } 2674 mOwner->endBox(); // stsd 2675 writeSttsBox(); 2676 writeCttsBox(); 2677 if (!mIsAudio) { 2678 writeStssBox(); 2679 } 2680 writeStszBox(); 2681 writeStscBox(); 2682 writeStcoBox(use32BitOffset); 2683 mOwner->endBox(); // stbl 2684} 2685 2686void MPEG4Writer::Track::writeVideoFourCCBox() { 2687 const char *mime; 2688 bool success = mMeta->findCString(kKeyMIMEType, &mime); 2689 CHECK(success); 2690 if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_MPEG4, mime)) { 2691 mOwner->beginBox("mp4v"); 2692 } else if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_H263, mime)) { 2693 mOwner->beginBox("s263"); 2694 } else if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_AVC, mime)) { 2695 mOwner->beginBox("avc1"); 2696 } else { 2697 ALOGE("Unknown mime type '%s'.", mime); 2698 CHECK(!"should not be here, unknown mime type."); 2699 } 2700 2701 mOwner->writeInt32(0); // reserved 2702 mOwner->writeInt16(0); // reserved 2703 mOwner->writeInt16(1); // data ref index 2704 mOwner->writeInt16(0); // predefined 2705 mOwner->writeInt16(0); // reserved 2706 mOwner->writeInt32(0); // predefined 2707 mOwner->writeInt32(0); // predefined 2708 mOwner->writeInt32(0); // predefined 2709 2710 int32_t width, height; 2711 success = mMeta->findInt32(kKeyWidth, &width); 2712 success = success && mMeta->findInt32(kKeyHeight, &height); 2713 CHECK(success); 2714 2715 mOwner->writeInt16(width); 2716 mOwner->writeInt16(height); 2717 mOwner->writeInt32(0x480000); // horiz resolution 2718 mOwner->writeInt32(0x480000); // vert resolution 2719 mOwner->writeInt32(0); // reserved 2720 mOwner->writeInt16(1); // frame count 2721 mOwner->writeInt8(0); // compressor string length 2722 mOwner->write(" ", 31); 2723 mOwner->writeInt16(0x18); // depth 2724 mOwner->writeInt16(-1); // predefined 2725 2726 CHECK_LT(23 + mCodecSpecificDataSize, 128); 2727 2728 if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_MPEG4, mime)) { 2729 writeMp4vEsdsBox(); 2730 } else if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_H263, mime)) { 2731 writeD263Box(); 2732 } else if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_AVC, mime)) { 2733 writeAvccBox(); 2734 } 2735 2736 writePaspBox(); 2737 mOwner->endBox(); // mp4v, s263 or avc1 2738} 2739 2740void MPEG4Writer::Track::writeAudioFourCCBox() { 2741 const char *mime; 2742 bool success = mMeta->findCString(kKeyMIMEType, &mime); 2743 CHECK(success); 2744 const char *fourcc = NULL; 2745 if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AMR_NB, mime)) { 2746 fourcc = "samr"; 2747 } else if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AMR_WB, mime)) { 2748 fourcc = "sawb"; 2749 } else if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AAC, mime)) { 2750 fourcc = "mp4a"; 2751 } else { 2752 ALOGE("Unknown mime type '%s'.", mime); 2753 CHECK(!"should not be here, unknown mime type."); 2754 } 2755 2756 mOwner->beginBox(fourcc); // audio format 2757 mOwner->writeInt32(0); // reserved 2758 mOwner->writeInt16(0); // reserved 2759 mOwner->writeInt16(0x1); // data ref index 2760 mOwner->writeInt32(0); // reserved 2761 mOwner->writeInt32(0); // reserved 2762 int32_t nChannels; 2763 CHECK_EQ(true, mMeta->findInt32(kKeyChannelCount, &nChannels)); 2764 mOwner->writeInt16(nChannels); // channel count 2765 mOwner->writeInt16(16); // sample size 2766 mOwner->writeInt16(0); // predefined 2767 mOwner->writeInt16(0); // reserved 2768 2769 int32_t samplerate; 2770 success = mMeta->findInt32(kKeySampleRate, &samplerate); 2771 CHECK(success); 2772 mOwner->writeInt32(samplerate << 16); 2773 if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AAC, mime)) { 2774 writeMp4aEsdsBox(); 2775 } else if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AMR_NB, mime) || 2776 !strcasecmp(MEDIA_MIMETYPE_AUDIO_AMR_WB, mime)) { 2777 writeDamrBox(); 2778 } 2779 mOwner->endBox(); 2780} 2781 2782void MPEG4Writer::Track::writeMp4aEsdsBox() { 2783 mOwner->beginBox("esds"); 2784 CHECK(mCodecSpecificData); 2785 CHECK_GT(mCodecSpecificDataSize, 0); 2786 2787 // Make sure all sizes encode to a single byte. 2788 CHECK_LT(mCodecSpecificDataSize + 23, 128); 2789 2790 mOwner->writeInt32(0); // version=0, flags=0 2791 mOwner->writeInt8(0x03); // ES_DescrTag 2792 mOwner->writeInt8(23 + mCodecSpecificDataSize); 2793 mOwner->writeInt16(0x0000);// ES_ID 2794 mOwner->writeInt8(0x00); 2795 2796 mOwner->writeInt8(0x04); // DecoderConfigDescrTag 2797 mOwner->writeInt8(15 + mCodecSpecificDataSize); 2798 mOwner->writeInt8(0x40); // objectTypeIndication ISO/IEC 14492-2 2799 mOwner->writeInt8(0x15); // streamType AudioStream 2800 2801 mOwner->writeInt16(0x03); // XXX 2802 mOwner->writeInt8(0x00); // buffer size 24-bit 2803 mOwner->writeInt32(96000); // max bit rate 2804 mOwner->writeInt32(96000); // avg bit rate 2805 2806 mOwner->writeInt8(0x05); // DecoderSpecificInfoTag 2807 mOwner->writeInt8(mCodecSpecificDataSize); 2808 mOwner->write(mCodecSpecificData, mCodecSpecificDataSize); 2809 2810 static const uint8_t kData2[] = { 2811 0x06, // SLConfigDescriptorTag 2812 0x01, 2813 0x02 2814 }; 2815 mOwner->write(kData2, sizeof(kData2)); 2816 2817 mOwner->endBox(); // esds 2818} 2819 2820void MPEG4Writer::Track::writeMp4vEsdsBox() { 2821 CHECK(mCodecSpecificData); 2822 CHECK_GT(mCodecSpecificDataSize, 0); 2823 mOwner->beginBox("esds"); 2824 2825 mOwner->writeInt32(0); // version=0, flags=0 2826 2827 mOwner->writeInt8(0x03); // ES_DescrTag 2828 mOwner->writeInt8(23 + mCodecSpecificDataSize); 2829 mOwner->writeInt16(0x0000); // ES_ID 2830 mOwner->writeInt8(0x1f); 2831 2832 mOwner->writeInt8(0x04); // DecoderConfigDescrTag 2833 mOwner->writeInt8(15 + mCodecSpecificDataSize); 2834 mOwner->writeInt8(0x20); // objectTypeIndication ISO/IEC 14492-2 2835 mOwner->writeInt8(0x11); // streamType VisualStream 2836 2837 static const uint8_t kData[] = { 2838 0x01, 0x77, 0x00, 2839 0x00, 0x03, 0xe8, 0x00, 2840 0x00, 0x03, 0xe8, 0x00 2841 }; 2842 mOwner->write(kData, sizeof(kData)); 2843 2844 mOwner->writeInt8(0x05); // DecoderSpecificInfoTag 2845 2846 mOwner->writeInt8(mCodecSpecificDataSize); 2847 mOwner->write(mCodecSpecificData, mCodecSpecificDataSize); 2848 2849 static const uint8_t kData2[] = { 2850 0x06, // SLConfigDescriptorTag 2851 0x01, 2852 0x02 2853 }; 2854 mOwner->write(kData2, sizeof(kData2)); 2855 2856 mOwner->endBox(); // esds 2857} 2858 2859void MPEG4Writer::Track::writeTkhdBox(uint32_t now) { 2860 mOwner->beginBox("tkhd"); 2861 // Flags = 7 to indicate that the track is enabled, and 2862 // part of the presentation 2863 mOwner->writeInt32(0x07); // version=0, flags=7 2864 mOwner->writeInt32(now); // creation time 2865 mOwner->writeInt32(now); // modification time 2866 mOwner->writeInt32(mTrackId); // track id starts with 1 2867 mOwner->writeInt32(0); // reserved 2868 int64_t trakDurationUs = getDurationUs(); 2869 int32_t mvhdTimeScale = mOwner->getTimeScale(); 2870 int32_t tkhdDuration = 2871 (trakDurationUs * mvhdTimeScale + 5E5) / 1E6; 2872 mOwner->writeInt32(tkhdDuration); // in mvhd timescale 2873 mOwner->writeInt32(0); // reserved 2874 mOwner->writeInt32(0); // reserved 2875 mOwner->writeInt16(0); // layer 2876 mOwner->writeInt16(0); // alternate group 2877 mOwner->writeInt16(mIsAudio ? 0x100 : 0); // volume 2878 mOwner->writeInt16(0); // reserved 2879 2880 mOwner->writeCompositionMatrix(mRotation); // matrix 2881 2882 if (mIsAudio) { 2883 mOwner->writeInt32(0); 2884 mOwner->writeInt32(0); 2885 } else { 2886 int32_t width, height; 2887 bool success = mMeta->findInt32(kKeyWidth, &width); 2888 success = success && mMeta->findInt32(kKeyHeight, &height); 2889 CHECK(success); 2890 2891 mOwner->writeInt32(width << 16); // 32-bit fixed-point value 2892 mOwner->writeInt32(height << 16); // 32-bit fixed-point value 2893 } 2894 mOwner->endBox(); // tkhd 2895} 2896 2897void MPEG4Writer::Track::writeVmhdBox() { 2898 mOwner->beginBox("vmhd"); 2899 mOwner->writeInt32(0x01); // version=0, flags=1 2900 mOwner->writeInt16(0); // graphics mode 2901 mOwner->writeInt16(0); // opcolor 2902 mOwner->writeInt16(0); 2903 mOwner->writeInt16(0); 2904 mOwner->endBox(); 2905} 2906 2907void MPEG4Writer::Track::writeSmhdBox() { 2908 mOwner->beginBox("smhd"); 2909 mOwner->writeInt32(0); // version=0, flags=0 2910 mOwner->writeInt16(0); // balance 2911 mOwner->writeInt16(0); // reserved 2912 mOwner->endBox(); 2913} 2914 2915void MPEG4Writer::Track::writeHdlrBox() { 2916 mOwner->beginBox("hdlr"); 2917 mOwner->writeInt32(0); // version=0, flags=0 2918 mOwner->writeInt32(0); // component type: should be mhlr 2919 mOwner->writeFourcc(mIsAudio ? "soun" : "vide"); // component subtype 2920 mOwner->writeInt32(0); // reserved 2921 mOwner->writeInt32(0); // reserved 2922 mOwner->writeInt32(0); // reserved 2923 // Removing "r" for the name string just makes the string 4 byte aligned 2924 mOwner->writeCString(mIsAudio ? "SoundHandle": "VideoHandle"); // name 2925 mOwner->endBox(); 2926} 2927 2928void MPEG4Writer::Track::writeMdhdBox(uint32_t now) { 2929 int64_t trakDurationUs = getDurationUs(); 2930 mOwner->beginBox("mdhd"); 2931 mOwner->writeInt32(0); // version=0, flags=0 2932 mOwner->writeInt32(now); // creation time 2933 mOwner->writeInt32(now); // modification time 2934 mOwner->writeInt32(mTimeScale); // media timescale 2935 int32_t mdhdDuration = (trakDurationUs * mTimeScale + 5E5) / 1E6; 2936 mOwner->writeInt32(mdhdDuration); // use media timescale 2937 // Language follows the three letter standard ISO-639-2/T 2938 // 'e', 'n', 'g' for "English", for instance. 2939 // Each character is packed as the difference between its ASCII value and 0x60. 2940 // For "English", these are 00101, 01110, 00111. 2941 // XXX: Where is the padding bit located: 0x15C7? 2942 mOwner->writeInt16(0); // language code 2943 mOwner->writeInt16(0); // predefined 2944 mOwner->endBox(); 2945} 2946 2947void MPEG4Writer::Track::writeDamrBox() { 2948 // 3gpp2 Spec AMRSampleEntry fields 2949 mOwner->beginBox("damr"); 2950 mOwner->writeCString(" "); // vendor: 4 bytes 2951 mOwner->writeInt8(0); // decoder version 2952 mOwner->writeInt16(0x83FF); // mode set: all enabled 2953 mOwner->writeInt8(0); // mode change period 2954 mOwner->writeInt8(1); // frames per sample 2955 mOwner->endBox(); 2956} 2957 2958void MPEG4Writer::Track::writeUrlBox() { 2959 // The table index here refers to the sample description index 2960 // in the sample table entries. 2961 mOwner->beginBox("url "); 2962 mOwner->writeInt32(1); // version=0, flags=1 (self-contained) 2963 mOwner->endBox(); // url 2964} 2965 2966void MPEG4Writer::Track::writeDrefBox() { 2967 mOwner->beginBox("dref"); 2968 mOwner->writeInt32(0); // version=0, flags=0 2969 mOwner->writeInt32(1); // entry count (either url or urn) 2970 writeUrlBox(); 2971 mOwner->endBox(); // dref 2972} 2973 2974void MPEG4Writer::Track::writeDinfBox() { 2975 mOwner->beginBox("dinf"); 2976 writeDrefBox(); 2977 mOwner->endBox(); // dinf 2978} 2979 2980void MPEG4Writer::Track::writeAvccBox() { 2981 CHECK(mCodecSpecificData); 2982 CHECK_GE(mCodecSpecificDataSize, 5); 2983 2984 // Patch avcc's lengthSize field to match the number 2985 // of bytes we use to indicate the size of a nal unit. 2986 uint8_t *ptr = (uint8_t *)mCodecSpecificData; 2987 ptr[4] = (ptr[4] & 0xfc) | (mOwner->useNalLengthFour() ? 3 : 1); 2988 mOwner->beginBox("avcC"); 2989 mOwner->write(mCodecSpecificData, mCodecSpecificDataSize); 2990 mOwner->endBox(); // avcC 2991} 2992 2993void MPEG4Writer::Track::writeD263Box() { 2994 mOwner->beginBox("d263"); 2995 mOwner->writeInt32(0); // vendor 2996 mOwner->writeInt8(0); // decoder version 2997 mOwner->writeInt8(10); // level: 10 2998 mOwner->writeInt8(0); // profile: 0 2999 mOwner->endBox(); // d263 3000} 3001 3002// This is useful if the pixel is not square 3003void MPEG4Writer::Track::writePaspBox() { 3004 mOwner->beginBox("pasp"); 3005 mOwner->writeInt32(1 << 16); // hspacing 3006 mOwner->writeInt32(1 << 16); // vspacing 3007 mOwner->endBox(); // pasp 3008} 3009 3010int32_t MPEG4Writer::Track::getStartTimeOffsetScaledTime() const { 3011 int64_t trackStartTimeOffsetUs = 0; 3012 int64_t moovStartTimeUs = mOwner->getStartTimestampUs(); 3013 if (mStartTimestampUs != moovStartTimeUs) { 3014 CHECK_GT(mStartTimestampUs, moovStartTimeUs); 3015 trackStartTimeOffsetUs = mStartTimestampUs - moovStartTimeUs; 3016 } 3017 return (trackStartTimeOffsetUs * mTimeScale + 500000LL) / 1000000LL; 3018} 3019 3020void MPEG4Writer::Track::writeSttsBox() { 3021 mOwner->beginBox("stts"); 3022 mOwner->writeInt32(0); // version=0, flags=0 3023 uint32_t duration; 3024 CHECK(mSttsTableEntries->get(duration, 1)); 3025 duration = htonl(duration); // Back to host byte order 3026 mSttsTableEntries->set(htonl(duration + getStartTimeOffsetScaledTime()), 1); 3027 mSttsTableEntries->write(mOwner); 3028 mOwner->endBox(); // stts 3029} 3030 3031void MPEG4Writer::Track::writeCttsBox() { 3032 if (mIsAudio) { // ctts is not for audio 3033 return; 3034 } 3035 3036 // There is no B frame at all 3037 if (mMinCttsOffsetTimeUs == mMaxCttsOffsetTimeUs) { 3038 return; 3039 } 3040 3041 // Do not write ctts box when there is no need to have it. 3042 if (mCttsTableEntries->count() == 0) { 3043 return; 3044 } 3045 3046 ALOGV("ctts box has %d entries with range [%" PRId64 ", %" PRId64 "]", 3047 mCttsTableEntries->count(), mMinCttsOffsetTimeUs, mMaxCttsOffsetTimeUs); 3048 3049 mOwner->beginBox("ctts"); 3050 mOwner->writeInt32(0); // version=0, flags=0 3051 uint32_t duration; 3052 CHECK(mCttsTableEntries->get(duration, 1)); 3053 duration = htonl(duration); // Back host byte order 3054 mCttsTableEntries->set(htonl(duration + getStartTimeOffsetScaledTime() - mMinCttsOffsetTimeUs), 1); 3055 mCttsTableEntries->write(mOwner); 3056 mOwner->endBox(); // ctts 3057} 3058 3059void MPEG4Writer::Track::writeStssBox() { 3060 mOwner->beginBox("stss"); 3061 mOwner->writeInt32(0); // version=0, flags=0 3062 mStssTableEntries->write(mOwner); 3063 mOwner->endBox(); // stss 3064} 3065 3066void MPEG4Writer::Track::writeStszBox() { 3067 mOwner->beginBox("stsz"); 3068 mOwner->writeInt32(0); // version=0, flags=0 3069 mOwner->writeInt32(0); 3070 mStszTableEntries->write(mOwner); 3071 mOwner->endBox(); // stsz 3072} 3073 3074void MPEG4Writer::Track::writeStscBox() { 3075 mOwner->beginBox("stsc"); 3076 mOwner->writeInt32(0); // version=0, flags=0 3077 mStscTableEntries->write(mOwner); 3078 mOwner->endBox(); // stsc 3079} 3080 3081void MPEG4Writer::Track::writeStcoBox(bool use32BitOffset) { 3082 mOwner->beginBox(use32BitOffset? "stco": "co64"); 3083 mOwner->writeInt32(0); // version=0, flags=0 3084 if (use32BitOffset) { 3085 mStcoTableEntries->write(mOwner); 3086 } else { 3087 mCo64TableEntries->write(mOwner); 3088 } 3089 mOwner->endBox(); // stco or co64 3090} 3091 3092void MPEG4Writer::writeUdtaBox() { 3093 beginBox("udta"); 3094 writeGeoDataBox(); 3095 endBox(); 3096} 3097 3098/* 3099 * Geodata is stored according to ISO-6709 standard. 3100 */ 3101void MPEG4Writer::writeGeoDataBox() { 3102 beginBox("\xA9xyz"); 3103 /* 3104 * For historical reasons, any user data start 3105 * with "\0xA9", must be followed by its assoicated 3106 * language code. 3107 * 0x0012: text string length 3108 * 0x15c7: lang (locale) code: en 3109 */ 3110 writeInt32(0x001215c7); 3111 writeLatitude(mLatitudex10000); 3112 writeLongitude(mLongitudex10000); 3113 writeInt8(0x2F); 3114 endBox(); 3115} 3116 3117} // namespace android 3118