| /* |
| * Copyright (C) 2009 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| //#define LOG_NDEBUG 0 |
| #define LOG_TAG "MPEG4Writer" |
| #include <utils/Log.h> |
| |
| #include <arpa/inet.h> |
| |
| #include <pthread.h> |
| #include <sys/prctl.h> |
| #include <sys/resource.h> |
| |
| #include <media/stagefright/MPEG4Writer.h> |
| #include <media/stagefright/MediaBuffer.h> |
| #include <media/stagefright/MetaData.h> |
| #include <media/stagefright/MediaDebug.h> |
| #include <media/stagefright/MediaDefs.h> |
| #include <media/stagefright/MediaErrors.h> |
| #include <media/stagefright/MediaSource.h> |
| #include <media/stagefright/Utils.h> |
| #include <media/mediarecorder.h> |
| #include <cutils/properties.h> |
| #include <sys/types.h> |
| #include <sys/stat.h> |
| #include <fcntl.h> |
| #include <unistd.h> |
| |
| #include "include/ESDS.h" |
| |
| namespace android { |
| |
| static const int64_t kMax32BitFileSize = 0x007fffffffLL; |
| static const uint8_t kNalUnitTypeSeqParamSet = 0x07; |
| static const uint8_t kNalUnitTypePicParamSet = 0x08; |
| static const int64_t kInitialDelayTimeUs = 700000LL; |
| |
| // Using longer adjustment period to suppress fluctuations in |
| // the audio encoding paths |
| static const int64_t kVideoMediaTimeAdjustPeriodTimeUs = 600000000LL; // 10 minutes |
| |
| class MPEG4Writer::Track { |
| public: |
| Track(MPEG4Writer *owner, const sp<MediaSource> &source, size_t trackId); |
| |
| ~Track(); |
| |
| status_t start(MetaData *params); |
| status_t stop(); |
| status_t pause(); |
| bool reachedEOS(); |
| |
| int64_t getDurationUs() const; |
| int64_t getEstimatedTrackSizeBytes() const; |
| void writeTrackHeader(bool use32BitOffset = true); |
| void bufferChunk(int64_t timestampUs); |
| bool isAvc() const { return mIsAvc; } |
| bool isAudio() const { return mIsAudio; } |
| bool isMPEG4() const { return mIsMPEG4; } |
| void addChunkOffset(off64_t offset); |
| int32_t getTrackId() const { return mTrackId; } |
| status_t dump(int fd, const Vector<String16>& args) const; |
| |
| private: |
| MPEG4Writer *mOwner; |
| sp<MetaData> mMeta; |
| sp<MediaSource> mSource; |
| volatile bool mDone; |
| volatile bool mPaused; |
| volatile bool mResumed; |
| volatile bool mStarted; |
| bool mIsAvc; |
| bool mIsAudio; |
| bool mIsMPEG4; |
| int32_t mTrackId; |
| int64_t mTrackDurationUs; |
| int64_t mMaxChunkDurationUs; |
| |
| // For realtime applications, we need to adjust the media clock |
| // for video track based on the audio media clock |
| bool mIsRealTimeRecording; |
| int64_t mMaxTimeStampUs; |
| int64_t mEstimatedTrackSizeBytes; |
| int64_t mMdatSizeBytes; |
| int32_t mTimeScale; |
| |
| pthread_t mThread; |
| |
| // mNumSamples is used to track how many samples in mSampleSizes List. |
| // This is to reduce the cost associated with mSampleSizes.size() call, |
| // since it is O(n). Ideally, the fix should be in List class. |
| size_t mNumSamples; |
| List<size_t> mSampleSizes; |
| bool mSamplesHaveSameSize; |
| |
| List<MediaBuffer *> mChunkSamples; |
| |
| size_t mNumStcoTableEntries; |
| List<off64_t> mChunkOffsets; |
| |
| size_t mNumStscTableEntries; |
| struct StscTableEntry { |
| |
| StscTableEntry(uint32_t chunk, uint32_t samples, uint32_t id) |
| : firstChunk(chunk), |
| samplesPerChunk(samples), |
| sampleDescriptionId(id) {} |
| |
| uint32_t firstChunk; |
| uint32_t samplesPerChunk; |
| uint32_t sampleDescriptionId; |
| }; |
| List<StscTableEntry> mStscTableEntries; |
| |
| size_t mNumStssTableEntries; |
| List<int32_t> mStssTableEntries; |
| |
| size_t mNumSttsTableEntries; |
| struct SttsTableEntry { |
| |
| SttsTableEntry(uint32_t count, uint32_t duration) |
| : sampleCount(count), sampleDuration(duration) {} |
| |
| uint32_t sampleCount; |
| uint32_t sampleDuration; // time scale based |
| }; |
| List<SttsTableEntry> mSttsTableEntries; |
| |
| // Sequence parameter set or picture parameter set |
| struct AVCParamSet { |
| AVCParamSet(uint16_t length, const uint8_t *data) |
| : mLength(length), mData(data) {} |
| |
| uint16_t mLength; |
| const uint8_t *mData; |
| }; |
| List<AVCParamSet> mSeqParamSets; |
| List<AVCParamSet> mPicParamSets; |
| uint8_t mProfileIdc; |
| uint8_t mProfileCompatible; |
| uint8_t mLevelIdc; |
| |
| void *mCodecSpecificData; |
| size_t mCodecSpecificDataSize; |
| bool mGotAllCodecSpecificData; |
| bool mTrackingProgressStatus; |
| |
| bool mReachedEOS; |
| int64_t mStartTimestampUs; |
| int64_t mStartTimeRealUs; |
| int64_t mFirstSampleTimeRealUs; |
| int64_t mPreviousTrackTimeUs; |
| int64_t mTrackEveryTimeDurationUs; |
| |
| // Has the media time adjustment for video started? |
| bool mIsMediaTimeAdjustmentOn; |
| // The time stamp when previous media time adjustment period starts |
| int64_t mPrevMediaTimeAdjustTimestampUs; |
| // Number of vidoe frames whose time stamp may be adjusted |
| int64_t mMediaTimeAdjustNumFrames; |
| // The sample number when previous meida time adjustmnet period starts |
| int64_t mPrevMediaTimeAdjustSample; |
| // The total accumulated drift time within a period of |
| // kVideoMediaTimeAdjustPeriodTimeUs. |
| int64_t mTotalDriftTimeToAdjustUs; |
| // The total accumalated drift time since the start of the recording |
| // excluding the current time adjustment period |
| int64_t mPrevTotalAccumDriftTimeUs; |
| |
| // Update the audio track's drift information. |
| void updateDriftTime(const sp<MetaData>& meta); |
| |
| // Adjust the time stamp of the video track according to |
| // the drift time information from the audio track. |
| void adjustMediaTime(int64_t *timestampUs); |
| |
| static void *ThreadWrapper(void *me); |
| status_t threadEntry(); |
| |
| const uint8_t *parseParamSet( |
| const uint8_t *data, size_t length, int type, size_t *paramSetLen); |
| |
| status_t makeAVCCodecSpecificData(const uint8_t *data, size_t size); |
| status_t copyAVCCodecSpecificData(const uint8_t *data, size_t size); |
| status_t parseAVCCodecSpecificData(const uint8_t *data, size_t size); |
| |
| // Track authoring progress status |
| void trackProgressStatus(int64_t timeUs, status_t err = OK); |
| void initTrackingProgressStatus(MetaData *params); |
| |
| void getCodecSpecificDataFromInputFormatIfPossible(); |
| |
| // Determine the track time scale |
| // If it is an audio track, try to use the sampling rate as |
| // the time scale; however, if user chooses the overwrite |
| // value, the user-supplied time scale will be used. |
| void setTimeScale(); |
| |
| // Simple validation on the codec specific data |
| status_t checkCodecSpecificData() const; |
| int32_t mRotation; |
| |
| void updateTrackSizeEstimate(); |
| void addOneStscTableEntry(size_t chunkId, size_t sampleId); |
| void addOneStssTableEntry(size_t sampleId); |
| |
| // Duration is time scale based |
| void addOneSttsTableEntry(size_t sampleCount, int32_t timescaledDur); |
| void sendTrackSummary(bool hasMultipleTracks); |
| |
| // Write the boxes |
| void writeStcoBox(bool use32BitOffset); |
| void writeStscBox(); |
| void writeStszBox(); |
| void writeStssBox(); |
| void writeSttsBox(); |
| void writeD263Box(); |
| void writePaspBox(); |
| void writeAvccBox(); |
| void writeUrlBox(); |
| void writeDrefBox(); |
| void writeDinfBox(); |
| void writeDamrBox(); |
| void writeMdhdBox(time_t now); |
| void writeSmhdBox(); |
| void writeVmhdBox(); |
| void writeHdlrBox(); |
| void writeTkhdBox(time_t now); |
| void writeMp4aEsdsBox(); |
| void writeMp4vEsdsBox(); |
| void writeAudioFourCCBox(); |
| void writeVideoFourCCBox(); |
| void writeStblBox(bool use32BitOffset); |
| |
| Track(const Track &); |
| Track &operator=(const Track &); |
| }; |
| |
| MPEG4Writer::MPEG4Writer(const char *filename) |
| : mFd(-1), |
| mInitCheck(NO_INIT), |
| mUse4ByteNalLength(true), |
| mUse32BitOffset(true), |
| mIsFileSizeLimitExplicitlyRequested(false), |
| mPaused(false), |
| mStarted(false), |
| mOffset(0), |
| mMdatOffset(0), |
| mEstimatedMoovBoxSize(0), |
| mInterleaveDurationUs(1000000), |
| mLatitudex10000(0), |
| mLongitudex10000(0), |
| mAreGeoTagsAvailable(false), |
| mStartTimeOffsetMs(-1) { |
| |
| mFd = open(filename, O_CREAT | O_LARGEFILE | O_TRUNC | O_RDWR); |
| if (mFd >= 0) { |
| mInitCheck = OK; |
| } |
| } |
| |
| MPEG4Writer::MPEG4Writer(int fd) |
| : mFd(dup(fd)), |
| mInitCheck(mFd < 0? NO_INIT: OK), |
| mUse4ByteNalLength(true), |
| mUse32BitOffset(true), |
| mIsFileSizeLimitExplicitlyRequested(false), |
| mPaused(false), |
| mStarted(false), |
| mOffset(0), |
| mMdatOffset(0), |
| mEstimatedMoovBoxSize(0), |
| mInterleaveDurationUs(1000000), |
| mLatitudex10000(0), |
| mLongitudex10000(0), |
| mAreGeoTagsAvailable(false), |
| mStartTimeOffsetMs(-1) { |
| } |
| |
| MPEG4Writer::~MPEG4Writer() { |
| stop(); |
| |
| while (!mTracks.empty()) { |
| List<Track *>::iterator it = mTracks.begin(); |
| delete *it; |
| (*it) = NULL; |
| mTracks.erase(it); |
| } |
| mTracks.clear(); |
| } |
| |
| status_t MPEG4Writer::dump( |
| int fd, const Vector<String16>& args) { |
| const size_t SIZE = 256; |
| char buffer[SIZE]; |
| String8 result; |
| snprintf(buffer, SIZE, " MPEG4Writer %p\n", this); |
| result.append(buffer); |
| snprintf(buffer, SIZE, " mStarted: %s\n", mStarted? "true": "false"); |
| result.append(buffer); |
| ::write(fd, result.string(), result.size()); |
| for (List<Track *>::iterator it = mTracks.begin(); |
| it != mTracks.end(); ++it) { |
| (*it)->dump(fd, args); |
| } |
| return OK; |
| } |
| |
| status_t MPEG4Writer::Track::dump( |
| int fd, const Vector<String16>& args) const { |
| const size_t SIZE = 256; |
| char buffer[SIZE]; |
| String8 result; |
| snprintf(buffer, SIZE, " %s track\n", mIsAudio? "Audio": "Video"); |
| result.append(buffer); |
| snprintf(buffer, SIZE, " reached EOS: %s\n", |
| mReachedEOS? "true": "false"); |
| result.append(buffer); |
| ::write(fd, result.string(), result.size()); |
| return OK; |
| } |
| |
| status_t MPEG4Writer::addSource(const sp<MediaSource> &source) { |
| Mutex::Autolock l(mLock); |
| if (mStarted) { |
| LOGE("Attempt to add source AFTER recording is started"); |
| return UNKNOWN_ERROR; |
| } |
| Track *track = new Track(this, source, mTracks.size()); |
| mTracks.push_back(track); |
| |
| return OK; |
| } |
| |
| status_t MPEG4Writer::startTracks(MetaData *params) { |
| for (List<Track *>::iterator it = mTracks.begin(); |
| it != mTracks.end(); ++it) { |
| status_t err = (*it)->start(params); |
| |
| if (err != OK) { |
| for (List<Track *>::iterator it2 = mTracks.begin(); |
| it2 != it; ++it2) { |
| (*it2)->stop(); |
| } |
| |
| return err; |
| } |
| } |
| return OK; |
| } |
| |
| int64_t MPEG4Writer::estimateMoovBoxSize(int32_t bitRate) { |
| // This implementation is highly experimental/heurisitic. |
| // |
| // Statistical analysis shows that metadata usually accounts |
| // for a small portion of the total file size, usually < 0.6%. |
| |
| // The default MIN_MOOV_BOX_SIZE is set to 0.6% x 1MB / 2, |
| // where 1MB is the common file size limit for MMS application. |
| // The default MAX _MOOV_BOX_SIZE value is based on about 3 |
| // minute video recording with a bit rate about 3 Mbps, because |
| // statistics also show that most of the video captured are going |
| // to be less than 3 minutes. |
| |
| // If the estimation is wrong, we will pay the price of wasting |
| // some reserved space. This should not happen so often statistically. |
| static const int32_t factor = mUse32BitOffset? 1: 2; |
| static const int64_t MIN_MOOV_BOX_SIZE = 3 * 1024; // 3 KB |
| static const int64_t MAX_MOOV_BOX_SIZE = (180 * 3000000 * 6LL / 8000); |
| int64_t size = MIN_MOOV_BOX_SIZE; |
| |
| // Max file size limit is set |
| if (mMaxFileSizeLimitBytes != 0 && mIsFileSizeLimitExplicitlyRequested) { |
| size = mMaxFileSizeLimitBytes * 6 / 1000; |
| } |
| |
| // Max file duration limit is set |
| if (mMaxFileDurationLimitUs != 0) { |
| if (bitRate > 0) { |
| int64_t size2 = |
| ((mMaxFileDurationLimitUs * bitRate * 6) / 1000 / 8000000); |
| if (mMaxFileSizeLimitBytes != 0 && mIsFileSizeLimitExplicitlyRequested) { |
| // When both file size and duration limits are set, |
| // we use the smaller limit of the two. |
| if (size > size2) { |
| size = size2; |
| } |
| } else { |
| // Only max file duration limit is set |
| size = size2; |
| } |
| } |
| } |
| |
| if (size < MIN_MOOV_BOX_SIZE) { |
| size = MIN_MOOV_BOX_SIZE; |
| } |
| |
| // Any long duration recording will be probably end up with |
| // non-streamable mp4 file. |
| if (size > MAX_MOOV_BOX_SIZE) { |
| size = MAX_MOOV_BOX_SIZE; |
| } |
| |
| LOGI("limits: %lld/%lld bytes/us, bit rate: %d bps and the estimated" |
| " moov size %lld bytes", |
| mMaxFileSizeLimitBytes, mMaxFileDurationLimitUs, bitRate, size); |
| return factor * size; |
| } |
| |
| status_t MPEG4Writer::start(MetaData *param) { |
| if (mInitCheck != OK) { |
| return UNKNOWN_ERROR; |
| } |
| |
| /* |
| * Check mMaxFileSizeLimitBytes at the beginning |
| * since mMaxFileSizeLimitBytes may be implicitly |
| * changed later for 32-bit file offset even if |
| * user does not ask to set it explicitly. |
| */ |
| if (mMaxFileSizeLimitBytes != 0) { |
| mIsFileSizeLimitExplicitlyRequested = true; |
| } |
| |
| int32_t use64BitOffset; |
| if (param && |
| param->findInt32(kKey64BitFileOffset, &use64BitOffset) && |
| use64BitOffset) { |
| mUse32BitOffset = false; |
| } |
| |
| if (mUse32BitOffset) { |
| // Implicit 32 bit file size limit |
| if (mMaxFileSizeLimitBytes == 0) { |
| mMaxFileSizeLimitBytes = kMax32BitFileSize; |
| } |
| |
| // If file size is set to be larger than the 32 bit file |
| // size limit, treat it as an error. |
| if (mMaxFileSizeLimitBytes > kMax32BitFileSize) { |
| LOGW("32-bit file size limit (%lld bytes) too big. " |
| "It is changed to %lld bytes", |
| mMaxFileSizeLimitBytes, kMax32BitFileSize); |
| mMaxFileSizeLimitBytes = kMax32BitFileSize; |
| } |
| } |
| |
| int32_t use2ByteNalLength; |
| if (param && |
| param->findInt32(kKey2ByteNalLength, &use2ByteNalLength) && |
| use2ByteNalLength) { |
| mUse4ByteNalLength = false; |
| } |
| |
| mStartTimestampUs = -1; |
| |
| if (mStarted) { |
| if (mPaused) { |
| mPaused = false; |
| return startTracks(param); |
| } |
| return OK; |
| } |
| |
| if (!param || |
| !param->findInt32(kKeyTimeScale, &mTimeScale)) { |
| mTimeScale = 1000; |
| } |
| CHECK(mTimeScale > 0); |
| LOGV("movie time scale: %d", mTimeScale); |
| |
| mStreamableFile = true; |
| mWriteMoovBoxToMemory = false; |
| mMoovBoxBuffer = NULL; |
| mMoovBoxBufferOffset = 0; |
| |
| writeFtypBox(param); |
| |
| mFreeBoxOffset = mOffset; |
| |
| if (mEstimatedMoovBoxSize == 0) { |
| int32_t bitRate = -1; |
| if (param) { |
| param->findInt32(kKeyBitRate, &bitRate); |
| } |
| mEstimatedMoovBoxSize = estimateMoovBoxSize(bitRate); |
| } |
| CHECK(mEstimatedMoovBoxSize >= 8); |
| lseek64(mFd, mFreeBoxOffset, SEEK_SET); |
| writeInt32(mEstimatedMoovBoxSize); |
| write("free", 4); |
| |
| mMdatOffset = mFreeBoxOffset + mEstimatedMoovBoxSize; |
| mOffset = mMdatOffset; |
| lseek64(mFd, mMdatOffset, SEEK_SET); |
| if (mUse32BitOffset) { |
| write("????mdat", 8); |
| } else { |
| write("\x00\x00\x00\x01mdat????????", 16); |
| } |
| |
| status_t err = startWriterThread(); |
| if (err != OK) { |
| return err; |
| } |
| |
| err = startTracks(param); |
| if (err != OK) { |
| return err; |
| } |
| |
| mStarted = true; |
| return OK; |
| } |
| |
| bool MPEG4Writer::use32BitFileOffset() const { |
| return mUse32BitOffset; |
| } |
| |
| status_t MPEG4Writer::pause() { |
| if (mInitCheck != OK) { |
| return OK; |
| } |
| mPaused = true; |
| status_t err = OK; |
| for (List<Track *>::iterator it = mTracks.begin(); |
| it != mTracks.end(); ++it) { |
| status_t status = (*it)->pause(); |
| if (status != OK) { |
| err = status; |
| } |
| } |
| return err; |
| } |
| |
| void MPEG4Writer::stopWriterThread() { |
| LOGD("Stopping writer thread"); |
| |
| { |
| Mutex::Autolock autolock(mLock); |
| |
| mDone = true; |
| mChunkReadyCondition.signal(); |
| } |
| |
| void *dummy; |
| pthread_join(mThread, &dummy); |
| LOGD("Writer thread stopped"); |
| } |
| |
| /* |
| * MP4 file standard defines a composition matrix: |
| * | a b u | |
| * | c d v | |
| * | x y w | |
| * |
| * the element in the matrix is stored in the following |
| * order: {a, b, u, c, d, v, x, y, w}, |
| * where a, b, c, d, x, and y is in 16.16 format, while |
| * u, v and w is in 2.30 format. |
| */ |
| void MPEG4Writer::writeCompositionMatrix(int degrees) { |
| LOGV("writeCompositionMatrix"); |
| uint32_t a = 0x00010000; |
| uint32_t b = 0; |
| uint32_t c = 0; |
| uint32_t d = 0x00010000; |
| switch (degrees) { |
| case 0: |
| break; |
| case 90: |
| a = 0; |
| b = 0x00010000; |
| c = 0xFFFF0000; |
| d = 0; |
| break; |
| case 180: |
| a = 0xFFFF0000; |
| d = 0xFFFF0000; |
| break; |
| case 270: |
| a = 0; |
| b = 0xFFFF0000; |
| c = 0x00010000; |
| d = 0; |
| break; |
| default: |
| CHECK(!"Should never reach this unknown rotation"); |
| break; |
| } |
| |
| writeInt32(a); // a |
| writeInt32(b); // b |
| writeInt32(0); // u |
| writeInt32(c); // c |
| writeInt32(d); // d |
| writeInt32(0); // v |
| writeInt32(0); // x |
| writeInt32(0); // y |
| writeInt32(0x40000000); // w |
| } |
| |
| |
| status_t MPEG4Writer::stop() { |
| if (mInitCheck != OK) { |
| return OK; |
| } |
| |
| status_t err = OK; |
| int64_t maxDurationUs = 0; |
| int64_t minDurationUs = 0x7fffffffffffffffLL; |
| for (List<Track *>::iterator it = mTracks.begin(); |
| it != mTracks.end(); ++it) { |
| status_t status = (*it)->stop(); |
| if (err == OK && status != OK) { |
| err = status; |
| } |
| |
| int64_t durationUs = (*it)->getDurationUs(); |
| if (durationUs > maxDurationUs) { |
| maxDurationUs = durationUs; |
| } |
| if (durationUs < minDurationUs) { |
| minDurationUs = durationUs; |
| } |
| } |
| |
| if (mTracks.size() > 1) { |
| LOGD("Duration from tracks range is [%lld, %lld] us", |
| minDurationUs, maxDurationUs); |
| } |
| |
| stopWriterThread(); |
| |
| // Do not write out movie header on error. |
| if (err != OK) { |
| close(mFd); |
| mFd = -1; |
| mInitCheck = NO_INIT; |
| mStarted = false; |
| return err; |
| } |
| |
| // Fix up the size of the 'mdat' chunk. |
| if (mUse32BitOffset) { |
| lseek64(mFd, mMdatOffset, SEEK_SET); |
| int32_t size = htonl(static_cast<int32_t>(mOffset - mMdatOffset)); |
| ::write(mFd, &size, 4); |
| } else { |
| lseek64(mFd, mMdatOffset + 8, SEEK_SET); |
| int64_t size = mOffset - mMdatOffset; |
| size = hton64(size); |
| ::write(mFd, &size, 8); |
| } |
| lseek64(mFd, mOffset, SEEK_SET); |
| |
| const off64_t moovOffset = mOffset; |
| mWriteMoovBoxToMemory = true; |
| mMoovBoxBuffer = (uint8_t *) malloc(mEstimatedMoovBoxSize); |
| mMoovBoxBufferOffset = 0; |
| CHECK(mMoovBoxBuffer != NULL); |
| writeMoovBox(maxDurationUs); |
| |
| mWriteMoovBoxToMemory = false; |
| if (mStreamableFile) { |
| CHECK(mMoovBoxBufferOffset + 8 <= mEstimatedMoovBoxSize); |
| |
| // Moov box |
| lseek64(mFd, mFreeBoxOffset, SEEK_SET); |
| mOffset = mFreeBoxOffset; |
| write(mMoovBoxBuffer, 1, mMoovBoxBufferOffset); |
| |
| // Free box |
| lseek64(mFd, mOffset, SEEK_SET); |
| writeInt32(mEstimatedMoovBoxSize - mMoovBoxBufferOffset); |
| write("free", 4); |
| |
| // Free temp memory |
| free(mMoovBoxBuffer); |
| mMoovBoxBuffer = NULL; |
| mMoovBoxBufferOffset = 0; |
| } else { |
| LOGI("The mp4 file will not be streamable."); |
| } |
| |
| CHECK(mBoxes.empty()); |
| |
| close(mFd); |
| mFd = -1; |
| mInitCheck = NO_INIT; |
| mStarted = false; |
| |
| return err; |
| } |
| |
| void MPEG4Writer::writeMvhdBox(int64_t durationUs) { |
| time_t now = time(NULL); |
| beginBox("mvhd"); |
| writeInt32(0); // version=0, flags=0 |
| writeInt32(now); // creation time |
| writeInt32(now); // modification time |
| writeInt32(mTimeScale); // mvhd timescale |
| int32_t duration = (durationUs * mTimeScale + 5E5) / 1E6; |
| writeInt32(duration); |
| writeInt32(0x10000); // rate: 1.0 |
| writeInt16(0x100); // volume |
| writeInt16(0); // reserved |
| writeInt32(0); // reserved |
| writeInt32(0); // reserved |
| writeCompositionMatrix(0); // matrix |
| writeInt32(0); // predefined |
| writeInt32(0); // predefined |
| writeInt32(0); // predefined |
| writeInt32(0); // predefined |
| writeInt32(0); // predefined |
| writeInt32(0); // predefined |
| writeInt32(mTracks.size() + 1); // nextTrackID |
| endBox(); // mvhd |
| } |
| |
| void MPEG4Writer::writeMoovBox(int64_t durationUs) { |
| beginBox("moov"); |
| writeMvhdBox(durationUs); |
| if (mAreGeoTagsAvailable) { |
| writeUdtaBox(); |
| } |
| int32_t id = 1; |
| for (List<Track *>::iterator it = mTracks.begin(); |
| it != mTracks.end(); ++it, ++id) { |
| (*it)->writeTrackHeader(mUse32BitOffset); |
| } |
| endBox(); // moov |
| } |
| |
| void MPEG4Writer::writeFtypBox(MetaData *param) { |
| beginBox("ftyp"); |
| |
| int32_t fileType; |
| if (param && param->findInt32(kKeyFileType, &fileType) && |
| fileType != OUTPUT_FORMAT_MPEG_4) { |
| writeFourcc("3gp4"); |
| } else { |
| writeFourcc("isom"); |
| } |
| |
| writeInt32(0); |
| writeFourcc("isom"); |
| writeFourcc("3gp4"); |
| endBox(); |
| } |
| |
| static bool isTestModeEnabled() { |
| #if (PROPERTY_VALUE_MAX < 5) |
| #error "PROPERTY_VALUE_MAX must be at least 5" |
| #endif |
| |
| // Test mode is enabled only if rw.media.record.test system |
| // property is enabled. |
| char value[PROPERTY_VALUE_MAX]; |
| if (property_get("rw.media.record.test", value, NULL) && |
| (!strcasecmp(value, "true") || !strcasecmp(value, "1"))) { |
| return true; |
| } |
| return false; |
| } |
| |
| void MPEG4Writer::sendSessionSummary() { |
| // Send session summary only if test mode is enabled |
| if (!isTestModeEnabled()) { |
| return; |
| } |
| |
| for (List<ChunkInfo>::iterator it = mChunkInfos.begin(); |
| it != mChunkInfos.end(); ++it) { |
| int trackNum = it->mTrack->getTrackId() << 28; |
| notify(MEDIA_RECORDER_TRACK_EVENT_INFO, |
| trackNum | MEDIA_RECORDER_TRACK_INTER_CHUNK_TIME_MS, |
| it->mMaxInterChunkDurUs); |
| } |
| } |
| |
| status_t MPEG4Writer::setInterleaveDuration(uint32_t durationUs) { |
| mInterleaveDurationUs = durationUs; |
| return OK; |
| } |
| |
| void MPEG4Writer::lock() { |
| mLock.lock(); |
| } |
| |
| void MPEG4Writer::unlock() { |
| mLock.unlock(); |
| } |
| |
| off64_t MPEG4Writer::addSample_l(MediaBuffer *buffer) { |
| off64_t old_offset = mOffset; |
| |
| ::write(mFd, |
| (const uint8_t *)buffer->data() + buffer->range_offset(), |
| buffer->range_length()); |
| |
| mOffset += buffer->range_length(); |
| |
| return old_offset; |
| } |
| |
| static void StripStartcode(MediaBuffer *buffer) { |
| if (buffer->range_length() < 4) { |
| return; |
| } |
| |
| const uint8_t *ptr = |
| (const uint8_t *)buffer->data() + buffer->range_offset(); |
| |
| if (!memcmp(ptr, "\x00\x00\x00\x01", 4)) { |
| buffer->set_range( |
| buffer->range_offset() + 4, buffer->range_length() - 4); |
| } |
| } |
| |
| off64_t MPEG4Writer::addLengthPrefixedSample_l(MediaBuffer *buffer) { |
| off64_t old_offset = mOffset; |
| |
| size_t length = buffer->range_length(); |
| |
| if (mUse4ByteNalLength) { |
| uint8_t x = length >> 24; |
| ::write(mFd, &x, 1); |
| x = (length >> 16) & 0xff; |
| ::write(mFd, &x, 1); |
| x = (length >> 8) & 0xff; |
| ::write(mFd, &x, 1); |
| x = length & 0xff; |
| ::write(mFd, &x, 1); |
| |
| ::write(mFd, |
| (const uint8_t *)buffer->data() + buffer->range_offset(), |
| length); |
| |
| mOffset += length + 4; |
| } else { |
| CHECK(length < 65536); |
| |
| uint8_t x = length >> 8; |
| ::write(mFd, &x, 1); |
| x = length & 0xff; |
| ::write(mFd, &x, 1); |
| ::write(mFd, (const uint8_t *)buffer->data() + buffer->range_offset(), length); |
| mOffset += length + 2; |
| } |
| |
| return old_offset; |
| } |
| |
| size_t MPEG4Writer::write( |
| const void *ptr, size_t size, size_t nmemb) { |
| |
| const size_t bytes = size * nmemb; |
| if (mWriteMoovBoxToMemory) { |
| // This happens only when we write the moov box at the end of |
| // recording, not for each output video/audio frame we receive. |
| off64_t moovBoxSize = 8 + mMoovBoxBufferOffset + bytes; |
| if (moovBoxSize > mEstimatedMoovBoxSize) { |
| for (List<off64_t>::iterator it = mBoxes.begin(); |
| it != mBoxes.end(); ++it) { |
| (*it) += mOffset; |
| } |
| lseek64(mFd, mOffset, SEEK_SET); |
| ::write(mFd, mMoovBoxBuffer, mMoovBoxBufferOffset); |
| ::write(mFd, ptr, size * nmemb); |
| mOffset += (bytes + mMoovBoxBufferOffset); |
| free(mMoovBoxBuffer); |
| mMoovBoxBuffer = NULL; |
| mMoovBoxBufferOffset = 0; |
| mWriteMoovBoxToMemory = false; |
| mStreamableFile = false; |
| } else { |
| memcpy(mMoovBoxBuffer + mMoovBoxBufferOffset, ptr, bytes); |
| mMoovBoxBufferOffset += bytes; |
| } |
| } else { |
| ::write(mFd, ptr, size * nmemb); |
| mOffset += bytes; |
| } |
| return bytes; |
| } |
| |
| void MPEG4Writer::beginBox(const char *fourcc) { |
| CHECK_EQ(strlen(fourcc), 4); |
| |
| mBoxes.push_back(mWriteMoovBoxToMemory? |
| mMoovBoxBufferOffset: mOffset); |
| |
| writeInt32(0); |
| writeFourcc(fourcc); |
| } |
| |
| void MPEG4Writer::endBox() { |
| CHECK(!mBoxes.empty()); |
| |
| off64_t offset = *--mBoxes.end(); |
| mBoxes.erase(--mBoxes.end()); |
| |
| if (mWriteMoovBoxToMemory) { |
| int32_t x = htonl(mMoovBoxBufferOffset - offset); |
| memcpy(mMoovBoxBuffer + offset, &x, 4); |
| } else { |
| lseek64(mFd, offset, SEEK_SET); |
| writeInt32(mOffset - offset); |
| mOffset -= 4; |
| lseek64(mFd, mOffset, SEEK_SET); |
| } |
| } |
| |
| void MPEG4Writer::writeInt8(int8_t x) { |
| write(&x, 1, 1); |
| } |
| |
| void MPEG4Writer::writeInt16(int16_t x) { |
| x = htons(x); |
| write(&x, 1, 2); |
| } |
| |
| void MPEG4Writer::writeInt32(int32_t x) { |
| x = htonl(x); |
| write(&x, 1, 4); |
| } |
| |
| void MPEG4Writer::writeInt64(int64_t x) { |
| x = hton64(x); |
| write(&x, 1, 8); |
| } |
| |
| void MPEG4Writer::writeCString(const char *s) { |
| size_t n = strlen(s); |
| write(s, 1, n + 1); |
| } |
| |
| void MPEG4Writer::writeFourcc(const char *s) { |
| CHECK_EQ(strlen(s), 4); |
| write(s, 1, 4); |
| } |
| |
| |
| // Written in +/-DD.DDDD format |
| void MPEG4Writer::writeLatitude(int degreex10000) { |
| bool isNegative = (degreex10000 < 0); |
| char sign = isNegative? '-': '+'; |
| |
| // Handle the whole part |
| char str[9]; |
| int wholePart = degreex10000 / 10000; |
| if (wholePart == 0) { |
| snprintf(str, 5, "%c%.2d.", sign, wholePart); |
| } else { |
| snprintf(str, 5, "%+.2d.", wholePart); |
| } |
| |
| // Handle the fractional part |
| int fractionalPart = degreex10000 - (wholePart * 10000); |
| if (fractionalPart < 0) { |
| fractionalPart = -fractionalPart; |
| } |
| snprintf(&str[4], 5, "%.4d", fractionalPart); |
| |
| // Do not write the null terminator |
| write(str, 1, 8); |
| } |
| |
| // Written in +/- DDD.DDDD format |
| void MPEG4Writer::writeLongitude(int degreex10000) { |
| bool isNegative = (degreex10000 < 0); |
| char sign = isNegative? '-': '+'; |
| |
| // Handle the whole part |
| char str[10]; |
| int wholePart = degreex10000 / 10000; |
| if (wholePart == 0) { |
| snprintf(str, 6, "%c%.3d.", sign, wholePart); |
| } else { |
| snprintf(str, 6, "%+.3d.", wholePart); |
| } |
| |
| // Handle the fractional part |
| int fractionalPart = degreex10000 - (wholePart * 10000); |
| if (fractionalPart < 0) { |
| fractionalPart = -fractionalPart; |
| } |
| snprintf(&str[5], 5, "%.4d", fractionalPart); |
| |
| // Do not write the null terminator |
| write(str, 1, 9); |
| } |
| |
| /* |
| * Geodata is stored according to ISO-6709 standard. |
| * latitudex10000 is latitude in degrees times 10000, and |
| * longitudex10000 is longitude in degrees times 10000. |
| * The range for the latitude is in [-90, +90], and |
| * The range for the longitude is in [-180, +180] |
| */ |
| status_t MPEG4Writer::setGeoData(int latitudex10000, int longitudex10000) { |
| // Is latitude or longitude out of range? |
| if (latitudex10000 < -900000 || latitudex10000 > 900000 || |
| longitudex10000 < -1800000 || longitudex10000 > 1800000) { |
| return BAD_VALUE; |
| } |
| |
| mLatitudex10000 = latitudex10000; |
| mLongitudex10000 = longitudex10000; |
| mAreGeoTagsAvailable = true; |
| return OK; |
| } |
| |
| void MPEG4Writer::write(const void *data, size_t size) { |
| write(data, 1, size); |
| } |
| |
| bool MPEG4Writer::isFileStreamable() const { |
| return mStreamableFile; |
| } |
| |
| bool MPEG4Writer::exceedsFileSizeLimit() { |
| // No limit |
| if (mMaxFileSizeLimitBytes == 0) { |
| return false; |
| } |
| |
| int64_t nTotalBytesEstimate = static_cast<int64_t>(mEstimatedMoovBoxSize); |
| for (List<Track *>::iterator it = mTracks.begin(); |
| it != mTracks.end(); ++it) { |
| nTotalBytesEstimate += (*it)->getEstimatedTrackSizeBytes(); |
| } |
| |
| // Be conservative in the estimate: do not exceed 95% of |
| // the target file limit. For small target file size limit, though, |
| // this will not help. |
| return (nTotalBytesEstimate >= (95 * mMaxFileSizeLimitBytes) / 100); |
| } |
| |
| bool MPEG4Writer::exceedsFileDurationLimit() { |
| // No limit |
| if (mMaxFileDurationLimitUs == 0) { |
| return false; |
| } |
| |
| for (List<Track *>::iterator it = mTracks.begin(); |
| it != mTracks.end(); ++it) { |
| if ((*it)->getDurationUs() >= mMaxFileDurationLimitUs) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| bool MPEG4Writer::reachedEOS() { |
| bool allDone = true; |
| for (List<Track *>::iterator it = mTracks.begin(); |
| it != mTracks.end(); ++it) { |
| if (!(*it)->reachedEOS()) { |
| allDone = false; |
| break; |
| } |
| } |
| |
| return allDone; |
| } |
| |
| void MPEG4Writer::setStartTimestampUs(int64_t timeUs) { |
| LOGI("setStartTimestampUs: %lld", timeUs); |
| CHECK(timeUs >= 0); |
| Mutex::Autolock autoLock(mLock); |
| if (mStartTimestampUs < 0 || mStartTimestampUs > timeUs) { |
| mStartTimestampUs = timeUs; |
| LOGI("Earliest track starting time: %lld", mStartTimestampUs); |
| } |
| } |
| |
| int64_t MPEG4Writer::getStartTimestampUs() { |
| Mutex::Autolock autoLock(mLock); |
| return mStartTimestampUs; |
| } |
| |
| size_t MPEG4Writer::numTracks() { |
| Mutex::Autolock autolock(mLock); |
| return mTracks.size(); |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| |
| MPEG4Writer::Track::Track( |
| MPEG4Writer *owner, const sp<MediaSource> &source, size_t trackId) |
| : mOwner(owner), |
| mMeta(source->getFormat()), |
| mSource(source), |
| mDone(false), |
| mPaused(false), |
| mResumed(false), |
| mStarted(false), |
| mTrackId(trackId), |
| mTrackDurationUs(0), |
| mEstimatedTrackSizeBytes(0), |
| mSamplesHaveSameSize(true), |
| mCodecSpecificData(NULL), |
| mCodecSpecificDataSize(0), |
| mGotAllCodecSpecificData(false), |
| mReachedEOS(false), |
| mRotation(0) { |
| getCodecSpecificDataFromInputFormatIfPossible(); |
| |
| const char *mime; |
| mMeta->findCString(kKeyMIMEType, &mime); |
| mIsAvc = !strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_AVC); |
| mIsAudio = !strncasecmp(mime, "audio/", 6); |
| mIsMPEG4 = !strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_MPEG4) || |
| !strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_AAC); |
| |
| setTimeScale(); |
| } |
| |
| void MPEG4Writer::Track::updateTrackSizeEstimate() { |
| |
| int64_t stcoBoxSizeBytes = mOwner->use32BitFileOffset() |
| ? mNumStcoTableEntries * 4 |
| : mNumStcoTableEntries * 8; |
| |
| int64_t stszBoxSizeBytes = mSamplesHaveSameSize? 4: (mNumSamples * 4); |
| |
| mEstimatedTrackSizeBytes = mMdatSizeBytes; // media data size |
| if (!mOwner->isFileStreamable()) { |
| // Reserved free space is not large enough to hold |
| // all meta data and thus wasted. |
| mEstimatedTrackSizeBytes += mNumStscTableEntries * 12 + // stsc box size |
| mNumStssTableEntries * 4 + // stss box size |
| mNumSttsTableEntries * 8 + // stts box size |
| stcoBoxSizeBytes + // stco box size |
| stszBoxSizeBytes; // stsz box size |
| } |
| } |
| |
| void MPEG4Writer::Track::addOneStscTableEntry( |
| size_t chunkId, size_t sampleId) { |
| |
| StscTableEntry stscEntry(chunkId, sampleId, 1); |
| mStscTableEntries.push_back(stscEntry); |
| ++mNumStscTableEntries; |
| } |
| |
| void MPEG4Writer::Track::addOneStssTableEntry(size_t sampleId) { |
| mStssTableEntries.push_back(sampleId); |
| ++mNumStssTableEntries; |
| } |
| |
| void MPEG4Writer::Track::addOneSttsTableEntry( |
| size_t sampleCount, int32_t duration) { |
| |
| SttsTableEntry sttsEntry(sampleCount, duration); |
| mSttsTableEntries.push_back(sttsEntry); |
| ++mNumSttsTableEntries; |
| } |
| |
| void MPEG4Writer::Track::addChunkOffset(off64_t offset) { |
| ++mNumStcoTableEntries; |
| mChunkOffsets.push_back(offset); |
| } |
| |
| void MPEG4Writer::Track::setTimeScale() { |
| LOGV("setTimeScale"); |
| // Default time scale |
| mTimeScale = 90000; |
| |
| if (mIsAudio) { |
| // Use the sampling rate as the default time scale for audio track. |
| int32_t sampleRate; |
| bool success = mMeta->findInt32(kKeySampleRate, &sampleRate); |
| CHECK(success); |
| mTimeScale = sampleRate; |
| } |
| |
| // If someone would like to overwrite the timescale, use user-supplied value. |
| int32_t timeScale; |
| if (mMeta->findInt32(kKeyTimeScale, &timeScale)) { |
| mTimeScale = timeScale; |
| } |
| |
| CHECK(mTimeScale > 0); |
| } |
| |
| void MPEG4Writer::Track::getCodecSpecificDataFromInputFormatIfPossible() { |
| const char *mime; |
| CHECK(mMeta->findCString(kKeyMIMEType, &mime)); |
| |
| if (!strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_AVC)) { |
| uint32_t type; |
| const void *data; |
| size_t size; |
| if (mMeta->findData(kKeyAVCC, &type, &data, &size)) { |
| mCodecSpecificData = malloc(size); |
| mCodecSpecificDataSize = size; |
| memcpy(mCodecSpecificData, data, size); |
| mGotAllCodecSpecificData = true; |
| } |
| } else if (!strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_MPEG4) |
| || !strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_AAC)) { |
| uint32_t type; |
| const void *data; |
| size_t size; |
| if (mMeta->findData(kKeyESDS, &type, &data, &size)) { |
| ESDS esds(data, size); |
| if (esds.getCodecSpecificInfo(&data, &size) == OK) { |
| mCodecSpecificData = malloc(size); |
| mCodecSpecificDataSize = size; |
| memcpy(mCodecSpecificData, data, size); |
| mGotAllCodecSpecificData = true; |
| } |
| } |
| } |
| } |
| |
| MPEG4Writer::Track::~Track() { |
| stop(); |
| |
| if (mCodecSpecificData != NULL) { |
| free(mCodecSpecificData); |
| mCodecSpecificData = NULL; |
| } |
| } |
| |
| void MPEG4Writer::Track::initTrackingProgressStatus(MetaData *params) { |
| LOGV("initTrackingProgressStatus"); |
| mPreviousTrackTimeUs = -1; |
| mTrackingProgressStatus = false; |
| mTrackEveryTimeDurationUs = 0; |
| { |
| int64_t timeUs; |
| if (params && params->findInt64(kKeyTrackTimeStatus, &timeUs)) { |
| LOGV("Receive request to track progress status for every %lld us", timeUs); |
| mTrackEveryTimeDurationUs = timeUs; |
| mTrackingProgressStatus = true; |
| } |
| } |
| } |
| |
| // static |
| void *MPEG4Writer::ThreadWrapper(void *me) { |
| LOGV("ThreadWrapper: %p", me); |
| MPEG4Writer *writer = static_cast<MPEG4Writer *>(me); |
| writer->threadFunc(); |
| return NULL; |
| } |
| |
| void MPEG4Writer::bufferChunk(const Chunk& chunk) { |
| LOGV("bufferChunk: %p", chunk.mTrack); |
| Mutex::Autolock autolock(mLock); |
| CHECK_EQ(mDone, false); |
| |
| for (List<ChunkInfo>::iterator it = mChunkInfos.begin(); |
| it != mChunkInfos.end(); ++it) { |
| |
| if (chunk.mTrack == it->mTrack) { // Found owner |
| it->mChunks.push_back(chunk); |
| mChunkReadyCondition.signal(); |
| return; |
| } |
| } |
| |
| CHECK("Received a chunk for a unknown track" == 0); |
| } |
| |
| void MPEG4Writer::writeChunkToFile(Chunk* chunk) { |
| LOGV("writeChunkToFile: %lld from %s track", |
| chunk.mTimestampUs, chunk.mTrack->isAudio()? "audio": "video"); |
| |
| int32_t isFirstSample = true; |
| while (!chunk->mSamples.empty()) { |
| List<MediaBuffer *>::iterator it = chunk->mSamples.begin(); |
| |
| off64_t offset = chunk->mTrack->isAvc() |
| ? addLengthPrefixedSample_l(*it) |
| : addSample_l(*it); |
| |
| if (isFirstSample) { |
| chunk->mTrack->addChunkOffset(offset); |
| isFirstSample = false; |
| } |
| |
| (*it)->release(); |
| (*it) = NULL; |
| chunk->mSamples.erase(it); |
| } |
| chunk->mSamples.clear(); |
| } |
| |
| void MPEG4Writer::writeAllChunks() { |
| LOGV("writeAllChunks"); |
| size_t outstandingChunks = 0; |
| Chunk chunk; |
| while (findChunkToWrite(&chunk)) { |
| writeChunkToFile(&chunk); |
| ++outstandingChunks; |
| } |
| |
| sendSessionSummary(); |
| |
| mChunkInfos.clear(); |
| LOGD("%d chunks are written in the last batch", outstandingChunks); |
| } |
| |
| bool MPEG4Writer::findChunkToWrite(Chunk *chunk) { |
| LOGV("findChunkToWrite"); |
| |
| int64_t minTimestampUs = 0x7FFFFFFFFFFFFFFFLL; |
| Track *track = NULL; |
| for (List<ChunkInfo>::iterator it = mChunkInfos.begin(); |
| it != mChunkInfos.end(); ++it) { |
| if (!it->mChunks.empty()) { |
| List<Chunk>::iterator chunkIt = it->mChunks.begin(); |
| if (chunkIt->mTimeStampUs < minTimestampUs) { |
| minTimestampUs = chunkIt->mTimeStampUs; |
| track = it->mTrack; |
| } |
| } |
| } |
| |
| if (track == NULL) { |
| LOGV("Nothing to be written after all"); |
| return false; |
| } |
| |
| if (mIsFirstChunk) { |
| mIsFirstChunk = false; |
| } |
| |
| for (List<ChunkInfo>::iterator it = mChunkInfos.begin(); |
| it != mChunkInfos.end(); ++it) { |
| if (it->mTrack == track) { |
| *chunk = *(it->mChunks.begin()); |
| it->mChunks.erase(it->mChunks.begin()); |
| CHECK_EQ(chunk->mTrack, track); |
| |
| int64_t interChunkTimeUs = |
| chunk->mTimeStampUs - it->mPrevChunkTimestampUs; |
| if (interChunkTimeUs > it->mPrevChunkTimestampUs) { |
| it->mMaxInterChunkDurUs = interChunkTimeUs; |
| } |
| |
| return true; |
| } |
| } |
| |
| return false; |
| } |
| |
| void MPEG4Writer::threadFunc() { |
| LOGV("threadFunc"); |
| |
| prctl(PR_SET_NAME, (unsigned long)"MPEG4Writer", 0, 0, 0); |
| |
| Mutex::Autolock autoLock(mLock); |
| while (!mDone) { |
| Chunk chunk; |
| bool chunkFound = false; |
| |
| while (!mDone && !(chunkFound = findChunkToWrite(&chunk))) { |
| mChunkReadyCondition.wait(mLock); |
| } |
| |
| // Actual write without holding the lock in order to |
| // reduce the blocking time for media track threads. |
| if (chunkFound) { |
| mLock.unlock(); |
| writeChunkToFile(&chunk); |
| mLock.lock(); |
| } |
| } |
| |
| writeAllChunks(); |
| } |
| |
| status_t MPEG4Writer::startWriterThread() { |
| LOGV("startWriterThread"); |
| |
| mDone = false; |
| mIsFirstChunk = true; |
| mDriftTimeUs = 0; |
| for (List<Track *>::iterator it = mTracks.begin(); |
| it != mTracks.end(); ++it) { |
| ChunkInfo info; |
| info.mTrack = *it; |
| info.mPrevChunkTimestampUs = 0; |
| info.mMaxInterChunkDurUs = 0; |
| mChunkInfos.push_back(info); |
| } |
| |
| pthread_attr_t attr; |
| pthread_attr_init(&attr); |
| pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE); |
| pthread_create(&mThread, &attr, ThreadWrapper, this); |
| pthread_attr_destroy(&attr); |
| return OK; |
| } |
| |
| |
| status_t MPEG4Writer::Track::start(MetaData *params) { |
| if (!mDone && mPaused) { |
| mPaused = false; |
| mResumed = true; |
| return OK; |
| } |
| |
| int64_t startTimeUs; |
| if (params == NULL || !params->findInt64(kKeyTime, &startTimeUs)) { |
| startTimeUs = 0; |
| } |
| mStartTimeRealUs = startTimeUs; |
| |
| int32_t rotationDegrees; |
| if (!mIsAudio && params && params->findInt32(kKeyRotation, &rotationDegrees)) { |
| mRotation = rotationDegrees; |
| } |
| |
| mIsRealTimeRecording = true; |
| { |
| int32_t isNotRealTime; |
| if (params && params->findInt32(kKeyNotRealTime, &isNotRealTime)) { |
| mIsRealTimeRecording = (isNotRealTime == 0); |
| } |
| } |
| |
| initTrackingProgressStatus(params); |
| |
| sp<MetaData> meta = new MetaData; |
| if (mIsRealTimeRecording && mOwner->numTracks() > 1) { |
| /* |
| * This extra delay of accepting incoming audio/video signals |
| * helps to align a/v start time at the beginning of a recording |
| * session, and it also helps eliminate the "recording" sound for |
| * camcorder applications. |
| * |
| * If client does not set the start time offset, we fall back to |
| * use the default initial delay value. |
| */ |
| int64_t startTimeOffsetUs = mOwner->getStartTimeOffsetMs() * 1000LL; |
| if (startTimeOffsetUs < 0) { // Start time offset was not set |
| startTimeOffsetUs = kInitialDelayTimeUs; |
| } |
| startTimeUs += startTimeOffsetUs; |
| LOGI("Start time offset: %lld us", startTimeOffsetUs); |
| } |
| |
| meta->setInt64(kKeyTime, startTimeUs); |
| |
| status_t err = mSource->start(meta.get()); |
| if (err != OK) { |
| mDone = mReachedEOS = true; |
| return err; |
| } |
| |
| pthread_attr_t attr; |
| pthread_attr_init(&attr); |
| pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE); |
| |
| mDone = false; |
| mStarted = true; |
| mTrackDurationUs = 0; |
| mReachedEOS = false; |
| mEstimatedTrackSizeBytes = 0; |
| mNumStcoTableEntries = 0; |
| mNumStssTableEntries = 0; |
| mNumStscTableEntries = 0; |
| mNumSttsTableEntries = 0; |
| mMdatSizeBytes = 0; |
| mIsMediaTimeAdjustmentOn = false; |
| mPrevMediaTimeAdjustTimestampUs = 0; |
| mMediaTimeAdjustNumFrames = 0; |
| mPrevMediaTimeAdjustSample = 0; |
| mTotalDriftTimeToAdjustUs = 0; |
| mPrevTotalAccumDriftTimeUs = 0; |
| mMaxChunkDurationUs = 0; |
| |
| pthread_create(&mThread, &attr, ThreadWrapper, this); |
| pthread_attr_destroy(&attr); |
| |
| return OK; |
| } |
| |
| status_t MPEG4Writer::Track::pause() { |
| mPaused = true; |
| return OK; |
| } |
| |
| status_t MPEG4Writer::Track::stop() { |
| LOGD("Stopping %s track", mIsAudio? "Audio": "Video"); |
| if (!mStarted) { |
| LOGE("Stop() called but track is not started"); |
| return ERROR_END_OF_STREAM; |
| } |
| |
| if (mDone) { |
| return OK; |
| } |
| mDone = true; |
| |
| void *dummy; |
| pthread_join(mThread, &dummy); |
| |
| status_t err = (status_t) dummy; |
| |
| LOGD("Stopping %s track source", mIsAudio? "Audio": "Video"); |
| { |
| status_t status = mSource->stop(); |
| if (err == OK && status != OK && status != ERROR_END_OF_STREAM) { |
| err = status; |
| } |
| } |
| |
| LOGD("%s track stopped", mIsAudio? "Audio": "Video"); |
| return err; |
| } |
| |
| bool MPEG4Writer::Track::reachedEOS() { |
| return mReachedEOS; |
| } |
| |
| // static |
| void *MPEG4Writer::Track::ThreadWrapper(void *me) { |
| Track *track = static_cast<Track *>(me); |
| |
| status_t err = track->threadEntry(); |
| return (void *) err; |
| } |
| |
| static void getNalUnitType(uint8_t byte, uint8_t* type) { |
| LOGV("getNalUnitType: %d", byte); |
| |
| // nal_unit_type: 5-bit unsigned integer |
| *type = (byte & 0x1F); |
| } |
| |
| static const uint8_t *findNextStartCode( |
| const uint8_t *data, size_t length) { |
| |
| LOGV("findNextStartCode: %p %d", data, length); |
| |
| size_t bytesLeft = length; |
| while (bytesLeft > 4 && |
| memcmp("\x00\x00\x00\x01", &data[length - bytesLeft], 4)) { |
| --bytesLeft; |
| } |
| if (bytesLeft <= 4) { |
| bytesLeft = 0; // Last parameter set |
| } |
| return &data[length - bytesLeft]; |
| } |
| |
| const uint8_t *MPEG4Writer::Track::parseParamSet( |
| const uint8_t *data, size_t length, int type, size_t *paramSetLen) { |
| |
| LOGV("parseParamSet"); |
| CHECK(type == kNalUnitTypeSeqParamSet || |
| type == kNalUnitTypePicParamSet); |
| |
| const uint8_t *nextStartCode = findNextStartCode(data, length); |
| *paramSetLen = nextStartCode - data; |
| if (*paramSetLen == 0) { |
| LOGE("Param set is malformed, since its length is 0"); |
| return NULL; |
| } |
| |
| AVCParamSet paramSet(*paramSetLen, data); |
| if (type == kNalUnitTypeSeqParamSet) { |
| if (*paramSetLen < 4) { |
| LOGE("Seq parameter set malformed"); |
| return NULL; |
| } |
| if (mSeqParamSets.empty()) { |
| mProfileIdc = data[1]; |
| mProfileCompatible = data[2]; |
| mLevelIdc = data[3]; |
| } else { |
| if (mProfileIdc != data[1] || |
| mProfileCompatible != data[2] || |
| mLevelIdc != data[3]) { |
| LOGE("Inconsistent profile/level found in seq parameter sets"); |
| return NULL; |
| } |
| } |
| mSeqParamSets.push_back(paramSet); |
| } else { |
| mPicParamSets.push_back(paramSet); |
| } |
| return nextStartCode; |
| } |
| |
| status_t MPEG4Writer::Track::copyAVCCodecSpecificData( |
| const uint8_t *data, size_t size) { |
| LOGV("copyAVCCodecSpecificData"); |
| |
| // 2 bytes for each of the parameter set length field |
| // plus the 7 bytes for the header |
| if (size < 4 + 7) { |
| LOGE("Codec specific data length too short: %d", size); |
| return ERROR_MALFORMED; |
| } |
| |
| mCodecSpecificDataSize = size; |
| mCodecSpecificData = malloc(size); |
| memcpy(mCodecSpecificData, data, size); |
| return OK; |
| } |
| |
| status_t MPEG4Writer::Track::parseAVCCodecSpecificData( |
| const uint8_t *data, size_t size) { |
| |
| LOGV("parseAVCCodecSpecificData"); |
| // Data starts with a start code. |
| // SPS and PPS are separated with start codes. |
| // Also, SPS must come before PPS |
| uint8_t type = kNalUnitTypeSeqParamSet; |
| bool gotSps = false; |
| bool gotPps = false; |
| const uint8_t *tmp = data; |
| const uint8_t *nextStartCode = data; |
| size_t bytesLeft = size; |
| size_t paramSetLen = 0; |
| mCodecSpecificDataSize = 0; |
| while (bytesLeft > 4 && !memcmp("\x00\x00\x00\x01", tmp, 4)) { |
| getNalUnitType(*(tmp + 4), &type); |
| if (type == kNalUnitTypeSeqParamSet) { |
| if (gotPps) { |
| LOGE("SPS must come before PPS"); |
| return ERROR_MALFORMED; |
| } |
| if (!gotSps) { |
| gotSps = true; |
| } |
| nextStartCode = parseParamSet(tmp + 4, bytesLeft - 4, type, ¶mSetLen); |
| } else if (type == kNalUnitTypePicParamSet) { |
| if (!gotSps) { |
| LOGE("SPS must come before PPS"); |
| return ERROR_MALFORMED; |
| } |
| if (!gotPps) { |
| gotPps = true; |
| } |
| nextStartCode = parseParamSet(tmp + 4, bytesLeft - 4, type, ¶mSetLen); |
| } else { |
| LOGE("Only SPS and PPS Nal units are expected"); |
| return ERROR_MALFORMED; |
| } |
| |
| if (nextStartCode == NULL) { |
| return ERROR_MALFORMED; |
| } |
| |
| // Move on to find the next parameter set |
| bytesLeft -= nextStartCode - tmp; |
| tmp = nextStartCode; |
| mCodecSpecificDataSize += (2 + paramSetLen); |
| } |
| |
| { |
| // Check on the number of seq parameter sets |
| size_t nSeqParamSets = mSeqParamSets.size(); |
| if (nSeqParamSets == 0) { |
| LOGE("Cound not find sequence parameter set"); |
| return ERROR_MALFORMED; |
| } |
| |
| if (nSeqParamSets > 0x1F) { |
| LOGE("Too many seq parameter sets (%d) found", nSeqParamSets); |
| return ERROR_MALFORMED; |
| } |
| } |
| |
| { |
| // Check on the number of pic parameter sets |
| size_t nPicParamSets = mPicParamSets.size(); |
| if (nPicParamSets == 0) { |
| LOGE("Cound not find picture parameter set"); |
| return ERROR_MALFORMED; |
| } |
| if (nPicParamSets > 0xFF) { |
| LOGE("Too many pic parameter sets (%d) found", nPicParamSets); |
| return ERROR_MALFORMED; |
| } |
| } |
| |
| { |
| // Check on the profiles |
| // These profiles requires additional parameter set extensions |
| if (mProfileIdc == 100 || mProfileIdc == 110 || |
| mProfileIdc == 122 || mProfileIdc == 144) { |
| LOGE("Sorry, no support for profile_idc: %d!", mProfileIdc); |
| return BAD_VALUE; |
| } |
| } |
| |
| return OK; |
| } |
| |
| status_t MPEG4Writer::Track::makeAVCCodecSpecificData( |
| const uint8_t *data, size_t size) { |
| |
| if (mCodecSpecificData != NULL) { |
| LOGE("Already have codec specific data"); |
| return ERROR_MALFORMED; |
| } |
| |
| if (size < 4) { |
| LOGE("Codec specific data length too short: %d", size); |
| return ERROR_MALFORMED; |
| } |
| |
| // Data is in the form of AVCCodecSpecificData |
| if (memcmp("\x00\x00\x00\x01", data, 4)) { |
| return copyAVCCodecSpecificData(data, size); |
| } |
| |
| if (parseAVCCodecSpecificData(data, size) != OK) { |
| return ERROR_MALFORMED; |
| } |
| |
| // ISO 14496-15: AVC file format |
| mCodecSpecificDataSize += 7; // 7 more bytes in the header |
| mCodecSpecificData = malloc(mCodecSpecificDataSize); |
| uint8_t *header = (uint8_t *)mCodecSpecificData; |
| header[0] = 1; // version |
| header[1] = mProfileIdc; // profile indication |
| header[2] = mProfileCompatible; // profile compatibility |
| header[3] = mLevelIdc; |
| |
| // 6-bit '111111' followed by 2-bit to lengthSizeMinuusOne |
| if (mOwner->useNalLengthFour()) { |
| header[4] = 0xfc | 3; // length size == 4 bytes |
| } else { |
| header[4] = 0xfc | 1; // length size == 2 bytes |
| } |
| |
| // 3-bit '111' followed by 5-bit numSequenceParameterSets |
| int nSequenceParamSets = mSeqParamSets.size(); |
| header[5] = 0xe0 | nSequenceParamSets; |
| header += 6; |
| for (List<AVCParamSet>::iterator it = mSeqParamSets.begin(); |
| it != mSeqParamSets.end(); ++it) { |
| // 16-bit sequence parameter set length |
| uint16_t seqParamSetLength = it->mLength; |
| header[0] = seqParamSetLength >> 8; |
| header[1] = seqParamSetLength & 0xff; |
| |
| // SPS NAL unit (sequence parameter length bytes) |
| memcpy(&header[2], it->mData, seqParamSetLength); |
| header += (2 + seqParamSetLength); |
| } |
| |
| // 8-bit nPictureParameterSets |
| int nPictureParamSets = mPicParamSets.size(); |
| header[0] = nPictureParamSets; |
| header += 1; |
| for (List<AVCParamSet>::iterator it = mPicParamSets.begin(); |
| it != mPicParamSets.end(); ++it) { |
| // 16-bit picture parameter set length |
| uint16_t picParamSetLength = it->mLength; |
| header[0] = picParamSetLength >> 8; |
| header[1] = picParamSetLength & 0xff; |
| |
| // PPS Nal unit (picture parameter set length bytes) |
| memcpy(&header[2], it->mData, picParamSetLength); |
| header += (2 + picParamSetLength); |
| } |
| |
| return OK; |
| } |
| |
| /* |
| * The video track's media time adjustment for real-time applications |
| * is described as follows: |
| * |
| * First, the media time adjustment is done for every period of |
| * kVideoMediaTimeAdjustPeriodTimeUs. kVideoMediaTimeAdjustPeriodTimeUs |
| * is currently a fixed value chosen heuristically. The value of |
| * kVideoMediaTimeAdjustPeriodTimeUs should not be very large or very small |
| * for two considerations: on one hand, a relatively large value |
| * helps reduce large fluctuation of drift time in the audio encoding |
| * path; while on the other hand, a relatively small value helps keep |
| * restoring synchronization in audio/video more frequently. Note for the |
| * very first period of kVideoMediaTimeAdjustPeriodTimeUs, there is |
| * no media time adjustment for the video track. |
| * |
| * Second, the total accumulated audio track time drift found |
| * in a period of kVideoMediaTimeAdjustPeriodTimeUs is distributed |
| * over a stream of incoming video frames. The number of video frames |
| * affected is determined based on the number of recorded video frames |
| * within the past kVideoMediaTimeAdjustPeriodTimeUs period. |
| * We choose to distribute the drift time over only a portion |
| * (rather than all) of the total number of recorded video frames |
| * in order to make sure that the video track media time adjustment is |
| * completed for the current period before the next video track media |
| * time adjustment period starts. Currently, the portion chosen is a |
| * half (0.5). |
| * |
| * Last, various additional checks are performed to ensure that |
| * the actual audio encoding path does not have too much drift. |
| * In particular, 1) we want to limit the average incremental time |
| * adjustment for each video frame to be less than a threshold |
| * for a single period of kVideoMediaTimeAdjustPeriodTimeUs. |
| * Currently, the threshold is set to 5 ms. If the average incremental |
| * media time adjustment for a video frame is larger than the |
| * threshold, the audio encoding path has too much time drift. |
| * 2) We also want to limit the total time drift in the audio |
| * encoding path to be less than a threshold for a period of |
| * kVideoMediaTimeAdjustPeriodTimeUs. Currently, the threshold |
| * is 0.5% of kVideoMediaTimeAdjustPeriodTimeUs. If the time drift of |
| * the audio encoding path is larger than the threshold, the audio |
| * encoding path has too much time drift. We treat the large time |
| * drift of the audio encoding path as errors, since there is no |
| * way to keep audio/video in synchronization for real-time |
| * applications if the time drift is too large unless we drop some |
| * video frames, which has its own problems that we don't want |
| * to get into for the time being. |
| */ |
| void MPEG4Writer::Track::adjustMediaTime(int64_t *timestampUs) { |
| if (*timestampUs - mPrevMediaTimeAdjustTimestampUs >= |
| kVideoMediaTimeAdjustPeriodTimeUs) { |
| |
| LOGV("New media time adjustment period at %lld us", *timestampUs); |
| mIsMediaTimeAdjustmentOn = true; |
| mMediaTimeAdjustNumFrames = |
| (mNumSamples - mPrevMediaTimeAdjustSample) >> 1; |
| |
| mPrevMediaTimeAdjustTimestampUs = *timestampUs; |
| mPrevMediaTimeAdjustSample = mNumSamples; |
| int64_t totalAccumDriftTimeUs = mOwner->getDriftTimeUs(); |
| mTotalDriftTimeToAdjustUs = |
| totalAccumDriftTimeUs - mPrevTotalAccumDriftTimeUs; |
| |
| mPrevTotalAccumDriftTimeUs = totalAccumDriftTimeUs; |
| |
| // Check on incremental adjusted time per frame |
| int64_t adjustTimePerFrameUs = |
| mTotalDriftTimeToAdjustUs / mMediaTimeAdjustNumFrames; |
| |
| if (adjustTimePerFrameUs < 0) { |
| adjustTimePerFrameUs = -adjustTimePerFrameUs; |
| } |
| if (adjustTimePerFrameUs >= 5000) { |
| LOGE("Adjusted time per video frame is %lld us", |
| adjustTimePerFrameUs); |
| CHECK(!"Video frame time adjustment is too large!"); |
| } |
| |
| // Check on total accumulated time drift within a period of |
| // kVideoMediaTimeAdjustPeriodTimeUs. |
| int64_t driftPercentage = (mTotalDriftTimeToAdjustUs * 1000) |
| / kVideoMediaTimeAdjustPeriodTimeUs; |
| |
| if (driftPercentage < 0) { |
| driftPercentage = -driftPercentage; |
| } |
| if (driftPercentage > 5) { |
| LOGE("Audio track has time drift %lld us over %lld us", |
| mTotalDriftTimeToAdjustUs, |
| kVideoMediaTimeAdjustPeriodTimeUs); |
| |
| CHECK(!"The audio track media time drifts too much!"); |
| } |
| |
| } |
| |
| if (mIsMediaTimeAdjustmentOn) { |
| if (mNumSamples - mPrevMediaTimeAdjustSample <= |
| mMediaTimeAdjustNumFrames) { |
| |
| // Do media time incremental adjustment |
| int64_t incrementalAdjustTimeUs = |
| (mTotalDriftTimeToAdjustUs * |
| (mNumSamples - mPrevMediaTimeAdjustSample)) |
| / mMediaTimeAdjustNumFrames; |
| |
| *timestampUs += |
| (incrementalAdjustTimeUs + mPrevTotalAccumDriftTimeUs); |
| |
| LOGV("Incremental video frame media time adjustment: %lld us", |
| (incrementalAdjustTimeUs + mPrevTotalAccumDriftTimeUs)); |
| } else { |
| // Within the remaining adjustment period, |
| // no incremental adjustment is needed. |
| *timestampUs += |
| (mTotalDriftTimeToAdjustUs + mPrevTotalAccumDriftTimeUs); |
| |
| LOGV("Fixed video frame media time adjustment: %lld us", |
| (mTotalDriftTimeToAdjustUs + mPrevTotalAccumDriftTimeUs)); |
| } |
| } |
| } |
| |
| /* |
| * Updates the drift time from the audio track so that |
| * the video track can get the updated drift time information |
| * from the file writer. The fluctuation of the drift time of the audio |
| * encoding path is smoothed out with a simple filter by giving a larger |
| * weight to more recently drift time. The filter coefficients, 0.5 and 0.5, |
| * are heuristically determined. |
| */ |
| void MPEG4Writer::Track::updateDriftTime(const sp<MetaData>& meta) { |
| int64_t driftTimeUs = 0; |
| if (meta->findInt64(kKeyDriftTime, &driftTimeUs)) { |
| int64_t prevDriftTimeUs = mOwner->getDriftTimeUs(); |
| int64_t timeUs = (driftTimeUs + prevDriftTimeUs) >> 1; |
| mOwner->setDriftTimeUs(timeUs); |
| } |
| } |
| |
| status_t MPEG4Writer::Track::threadEntry() { |
| int32_t count = 0; |
| const int64_t interleaveDurationUs = mOwner->interleaveDuration(); |
| const bool hasMultipleTracks = (mOwner->numTracks() > 1); |
| int64_t chunkTimestampUs = 0; |
| int32_t nChunks = 0; |
| int32_t nZeroLengthFrames = 0; |
| int64_t lastTimestampUs = 0; // Previous sample time stamp in ms |
| int64_t lastDurationUs = 0; // Between the previous two samples in ms |
| int64_t currDurationTicks = 0; // Timescale based ticks |
| int64_t lastDurationTicks = 0; // Timescale based ticks |
| int32_t sampleCount = 1; // Sample count in the current stts table entry |
| uint32_t previousSampleSize = 0; // Size of the previous sample |
| int64_t previousPausedDurationUs = 0; |
| int64_t timestampUs; |
| |
| if (mIsAudio) { |
| prctl(PR_SET_NAME, (unsigned long)"AudioTrackEncoding", 0, 0, 0); |
| } else { |
| prctl(PR_SET_NAME, (unsigned long)"VideoTrackEncoding", 0, 0, 0); |
| } |
| setpriority(PRIO_PROCESS, 0, ANDROID_PRIORITY_AUDIO); |
| |
| sp<MetaData> meta_data; |
| |
| mNumSamples = 0; |
| status_t err = OK; |
| MediaBuffer *buffer; |
| while (!mDone && (err = mSource->read(&buffer)) == OK) { |
| if (buffer->range_length() == 0) { |
| buffer->release(); |
| buffer = NULL; |
| ++nZeroLengthFrames; |
| continue; |
| } |
| |
| // If the codec specific data has not been received yet, delay pause. |
| // After the codec specific data is received, discard what we received |
| // when the track is to be paused. |
| if (mPaused && !mResumed) { |
| buffer->release(); |
| buffer = NULL; |
| continue; |
| } |
| |
| ++count; |
| |
| int32_t isCodecConfig; |
| if (buffer->meta_data()->findInt32(kKeyIsCodecConfig, &isCodecConfig) |
| && isCodecConfig) { |
| CHECK(!mGotAllCodecSpecificData); |
| |
| if (mIsAvc) { |
| status_t err = makeAVCCodecSpecificData( |
| (const uint8_t *)buffer->data() |
| + buffer->range_offset(), |
| buffer->range_length()); |
| CHECK_EQ(OK, err); |
| } else if (mIsMPEG4) { |
| mCodecSpecificDataSize = buffer->range_length(); |
| mCodecSpecificData = malloc(mCodecSpecificDataSize); |
| memcpy(mCodecSpecificData, |
| (const uint8_t *)buffer->data() |
| + buffer->range_offset(), |
| buffer->range_length()); |
| } |
| |
| buffer->release(); |
| buffer = NULL; |
| |
| mGotAllCodecSpecificData = true; |
| continue; |
| } |
| |
| // Make a deep copy of the MediaBuffer and Metadata and release |
| // the original as soon as we can |
| MediaBuffer *copy = new MediaBuffer(buffer->range_length()); |
| memcpy(copy->data(), (uint8_t *)buffer->data() + buffer->range_offset(), |
| buffer->range_length()); |
| copy->set_range(0, buffer->range_length()); |
| meta_data = new MetaData(*buffer->meta_data().get()); |
| buffer->release(); |
| buffer = NULL; |
| |
| if (mIsAvc) StripStartcode(copy); |
| |
| size_t sampleSize = copy->range_length(); |
| if (mIsAvc) { |
| if (mOwner->useNalLengthFour()) { |
| sampleSize += 4; |
| } else { |
| sampleSize += 2; |
| } |
| } |
| |
| // Max file size or duration handling |
| mMdatSizeBytes += sampleSize; |
| updateTrackSizeEstimate(); |
| |
| if (mOwner->exceedsFileSizeLimit()) { |
| mOwner->notify(MEDIA_RECORDER_EVENT_INFO, MEDIA_RECORDER_INFO_MAX_FILESIZE_REACHED, 0); |
| break; |
| } |
| if (mOwner->exceedsFileDurationLimit()) { |
| mOwner->notify(MEDIA_RECORDER_EVENT_INFO, MEDIA_RECORDER_INFO_MAX_DURATION_REACHED, 0); |
| break; |
| } |
| |
| |
| int32_t isSync = false; |
| meta_data->findInt32(kKeyIsSyncFrame, &isSync); |
| |
| /* |
| * The original timestamp found in the data buffer will be modified as below: |
| * |
| * There is a playback offset into this track if the track's start time |
| * is not the same as the movie start time, which will be recorded in edst |
| * box of the output file. The playback offset is to make sure that the |
| * starting time of the audio/video tracks are synchronized. Although the |
| * track's media timestamp may be subject to various modifications |
| * as outlined below, the track's playback offset time remains unchanged |
| * once the first data buffer of the track is received. |
| * |
| * The media time stamp will be calculated by subtracting the playback offset |
| * (and potential pause durations) from the original timestamp in the buffer. |
| * |
| * If this track is a video track for a real-time recording application with |
| * both audio and video tracks, its media timestamp will subject to further |
| * modification based on the media clock of the audio track. This modification |
| * is needed for the purpose of maintaining good audio/video synchronization. |
| * |
| * If the recording session is paused and resumed multiple times, the track |
| * media timestamp will be modified as if the recording session had never been |
| * paused at all during playback of the recorded output file. In other words, |
| * the output file will have no memory of pause/resume durations. |
| * |
| */ |
| CHECK(meta_data->findInt64(kKeyTime, ×tampUs)); |
| LOGV("%s timestampUs: %lld", mIsAudio? "Audio": "Video", timestampUs); |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| if (mNumSamples == 0) { |
| mFirstSampleTimeRealUs = systemTime() / 1000; |
| mStartTimestampUs = timestampUs; |
| mOwner->setStartTimestampUs(mStartTimestampUs); |
| previousPausedDurationUs = mStartTimestampUs; |
| } |
| |
| if (mResumed) { |
| int64_t durExcludingEarlierPausesUs = timestampUs - previousPausedDurationUs; |
| CHECK(durExcludingEarlierPausesUs >= 0); |
| int64_t pausedDurationUs = durExcludingEarlierPausesUs - mTrackDurationUs; |
| CHECK(pausedDurationUs >= lastDurationUs); |
| previousPausedDurationUs += pausedDurationUs - lastDurationUs; |
| mResumed = false; |
| } |
| |
| timestampUs -= previousPausedDurationUs; |
| CHECK(timestampUs >= 0); |
| |
| // Media time adjustment for real-time applications |
| if (mIsRealTimeRecording) { |
| if (mIsAudio) { |
| updateDriftTime(meta_data); |
| } else { |
| adjustMediaTime(×tampUs); |
| } |
| } |
| |
| CHECK(timestampUs >= 0); |
| if (mNumSamples > 1) { |
| if (timestampUs <= lastTimestampUs) { |
| LOGW("Frame arrives too late!"); |
| // Don't drop the late frame, since dropping a frame may cause |
| // problems later during playback |
| |
| // The idea here is to avoid having two or more samples with the |
| // same timestamp in the output file. |
| if (mTimeScale >= 1000000LL) { |
| timestampUs = lastTimestampUs + 1; |
| } else { |
| timestampUs = lastTimestampUs + (1000000LL + (mTimeScale >> 1)) / mTimeScale; |
| } |
| } |
| } |
| |
| LOGV("%s media time stamp: %lld and previous paused duration %lld", |
| mIsAudio? "Audio": "Video", timestampUs, previousPausedDurationUs); |
| if (timestampUs > mTrackDurationUs) { |
| mTrackDurationUs = timestampUs; |
| } |
| |
| mSampleSizes.push_back(sampleSize); |
| ++mNumSamples; |
| if (mNumSamples > 2) { |
| // We need to use the time scale based ticks, rather than the |
| // timestamp itself to determine whether we have to use a new |
| // stts entry, since we may have rounding errors. |
| // The calculation is intended to reduce the accumulated |
| // rounding errors. |
| currDurationTicks = |
| ((timestampUs * mTimeScale + 500000LL) / 1000000LL - |
| (lastTimestampUs * mTimeScale + 500000LL) / 1000000LL); |
| |
| // Force the first sample to have its own stts entry so that |
| // we can adjust its value later to maintain the A/V sync. |
| if (mNumSamples == 3 || currDurationTicks != lastDurationTicks) { |
| LOGV("%s lastDurationUs: %lld us, currDurationTicks: %lld us", |
| mIsAudio? "Audio": "Video", lastDurationUs, currDurationTicks); |
| addOneSttsTableEntry(sampleCount, lastDurationTicks); |
| sampleCount = 1; |
| } else { |
| ++sampleCount; |
| } |
| } |
| if (mSamplesHaveSameSize) { |
| if (mNumSamples >= 2 && previousSampleSize != sampleSize) { |
| mSamplesHaveSameSize = false; |
| } |
| previousSampleSize = sampleSize; |
| } |
| LOGV("%s timestampUs/lastTimestampUs: %lld/%lld", |
| mIsAudio? "Audio": "Video", timestampUs, lastTimestampUs); |
| lastDurationUs = timestampUs - lastTimestampUs; |
| lastDurationTicks = currDurationTicks; |
| lastTimestampUs = timestampUs; |
| |
| if (isSync != 0) { |
| addOneStssTableEntry(mNumSamples); |
| } |
| |
| if (mTrackingProgressStatus) { |
| if (mPreviousTrackTimeUs <= 0) { |
| mPreviousTrackTimeUs = mStartTimestampUs; |
| } |
| trackProgressStatus(timestampUs); |
| } |
| if (!hasMultipleTracks) { |
| off64_t offset = mIsAvc? mOwner->addLengthPrefixedSample_l(copy) |
| : mOwner->addSample_l(copy); |
| if (mChunkOffsets.empty()) { |
| addChunkOffset(offset); |
| } |
| copy->release(); |
| copy = NULL; |
| continue; |
| } |
| |
| mChunkSamples.push_back(copy); |
| if (interleaveDurationUs == 0) { |
| addOneStscTableEntry(++nChunks, 1); |
| bufferChunk(timestampUs); |
| } else { |
| if (chunkTimestampUs == 0) { |
| chunkTimestampUs = timestampUs; |
| } else { |
| int64_t chunkDurationUs = timestampUs - chunkTimestampUs; |
| if (chunkDurationUs > interleaveDurationUs) { |
| if (chunkDurationUs > mMaxChunkDurationUs) { |
| mMaxChunkDurationUs = chunkDurationUs; |
| } |
| ++nChunks; |
| if (nChunks == 1 || // First chunk |
| (--(mStscTableEntries.end()))->samplesPerChunk != |
| mChunkSamples.size()) { |
| addOneStscTableEntry(nChunks, mChunkSamples.size()); |
| } |
| bufferChunk(timestampUs); |
| chunkTimestampUs = timestampUs; |
| } |
| } |
| } |
| |
| } |
| |
| if (mSampleSizes.empty() || // no samples written |
| (!mIsAudio && mNumStssTableEntries == 0) || // no sync frames for video |
| (OK != checkCodecSpecificData())) { // no codec specific data |
| err = ERROR_MALFORMED; |
| } |
| mOwner->trackProgressStatus(mTrackId, -1, err); |
| |
| // Last chunk |
| if (!hasMultipleTracks) { |
| addOneStscTableEntry(1, mNumSamples); |
| } else if (!mChunkSamples.empty()) { |
| addOneStscTableEntry(++nChunks, mChunkSamples.size()); |
| bufferChunk(timestampUs); |
| } |
| |
| // We don't really know how long the last frame lasts, since |
| // there is no frame time after it, just repeat the previous |
| // frame's duration. |
| if (mNumSamples == 1) { |
| lastDurationUs = 0; // A single sample's duration |
| lastDurationTicks = 0; |
| } else { |
| ++sampleCount; // Count for the last sample |
| } |
| |
| if (mNumSamples <= 2) { |
| addOneSttsTableEntry(1, lastDurationTicks); |
| if (sampleCount - 1 > 0) { |
| addOneSttsTableEntry(sampleCount - 1, lastDurationTicks); |
| } |
| } else { |
| addOneSttsTableEntry(sampleCount, lastDurationTicks); |
| } |
| |
| mTrackDurationUs += lastDurationUs; |
| mReachedEOS = true; |
| |
| sendTrackSummary(hasMultipleTracks); |
| |
| LOGI("Received total/0-length (%d/%d) buffers and encoded %d frames. - %s", |
| count, nZeroLengthFrames, mNumSamples, mIsAudio? "audio": "video"); |
| if (mIsAudio) { |
| LOGI("Audio track drift time: %lld us", mOwner->getDriftTimeUs()); |
| } |
| |
| if (err == ERROR_END_OF_STREAM) { |
| return OK; |
| } |
| return err; |
| } |
| |
| void MPEG4Writer::Track::sendTrackSummary(bool hasMultipleTracks) { |
| |
| // Send track summary only if test mode is enabled. |
| if (!isTestModeEnabled()) { |
| return; |
| } |
| |
| int trackNum = (mTrackId << 28); |
| |
| mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO, |
| trackNum | MEDIA_RECORDER_TRACK_INFO_TYPE, |
| mIsAudio? 0: 1); |
| |
| mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO, |
| trackNum | MEDIA_RECORDER_TRACK_INFO_DURATION_MS, |
| mTrackDurationUs / 1000); |
| |
| mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO, |
| trackNum | MEDIA_RECORDER_TRACK_INFO_ENCODED_FRAMES, |
| mNumSamples); |
| |
| { |
| // The system delay time excluding the requested initial delay that |
| // is used to eliminate the recording sound. |
| int64_t startTimeOffsetUs = mOwner->getStartTimeOffsetMs() * 1000LL; |
| if (startTimeOffsetUs < 0) { // Start time offset was not set |
| startTimeOffsetUs = kInitialDelayTimeUs; |
| } |
| int64_t initialDelayUs = |
| mFirstSampleTimeRealUs - mStartTimeRealUs - startTimeOffsetUs; |
| |
| mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO, |
| trackNum | MEDIA_RECORDER_TRACK_INFO_INITIAL_DELAY_MS, |
| (initialDelayUs) / 1000); |
| } |
| |
| mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO, |
| trackNum | MEDIA_RECORDER_TRACK_INFO_DATA_KBYTES, |
| mMdatSizeBytes / 1024); |
| |
| if (hasMultipleTracks) { |
| mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO, |
| trackNum | MEDIA_RECORDER_TRACK_INFO_MAX_CHUNK_DUR_MS, |
| mMaxChunkDurationUs / 1000); |
| |
| int64_t moovStartTimeUs = mOwner->getStartTimestampUs(); |
| if (mStartTimestampUs != moovStartTimeUs) { |
| int64_t startTimeOffsetUs = mStartTimestampUs - moovStartTimeUs; |
| mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO, |
| trackNum | MEDIA_RECORDER_TRACK_INFO_START_OFFSET_MS, |
| startTimeOffsetUs / 1000); |
| } |
| } |
| } |
| |
| void MPEG4Writer::Track::trackProgressStatus(int64_t timeUs, status_t err) { |
| LOGV("trackProgressStatus: %lld us", timeUs); |
| if (mTrackEveryTimeDurationUs > 0 && |
| timeUs - mPreviousTrackTimeUs >= mTrackEveryTimeDurationUs) { |
| LOGV("Fire time tracking progress status at %lld us", timeUs); |
| mOwner->trackProgressStatus(mTrackId, timeUs - mPreviousTrackTimeUs, err); |
| mPreviousTrackTimeUs = timeUs; |
| } |
| } |
| |
| void MPEG4Writer::trackProgressStatus( |
| size_t trackId, int64_t timeUs, status_t err) { |
| Mutex::Autolock lock(mLock); |
| int32_t trackNum = (trackId << 28); |
| |
| // Error notification |
| // Do not consider ERROR_END_OF_STREAM an error |
| if (err != OK && err != ERROR_END_OF_STREAM) { |
| notify(MEDIA_RECORDER_TRACK_EVENT_ERROR, |
| trackNum | MEDIA_RECORDER_TRACK_ERROR_GENERAL, |
| err); |
| return; |
| } |
| |
| if (timeUs == -1) { |
| // Send completion notification |
| notify(MEDIA_RECORDER_TRACK_EVENT_INFO, |
| trackNum | MEDIA_RECORDER_TRACK_INFO_COMPLETION_STATUS, |
| err); |
| } else { |
| // Send progress status |
| notify(MEDIA_RECORDER_TRACK_EVENT_INFO, |
| trackNum | MEDIA_RECORDER_TRACK_INFO_PROGRESS_IN_TIME, |
| timeUs / 1000); |
| } |
| } |
| |
| void MPEG4Writer::setDriftTimeUs(int64_t driftTimeUs) { |
| LOGV("setDriftTimeUs: %lld us", driftTimeUs); |
| Mutex::Autolock autolock(mLock); |
| mDriftTimeUs = driftTimeUs; |
| } |
| |
| int64_t MPEG4Writer::getDriftTimeUs() { |
| LOGV("getDriftTimeUs: %lld us", mDriftTimeUs); |
| Mutex::Autolock autolock(mLock); |
| return mDriftTimeUs; |
| } |
| |
| bool MPEG4Writer::useNalLengthFour() { |
| return mUse4ByteNalLength; |
| } |
| |
| void MPEG4Writer::Track::bufferChunk(int64_t timestampUs) { |
| LOGV("bufferChunk"); |
| |
| Chunk chunk(this, timestampUs, mChunkSamples); |
| mOwner->bufferChunk(chunk); |
| mChunkSamples.clear(); |
| } |
| |
| int64_t MPEG4Writer::Track::getDurationUs() const { |
| return mTrackDurationUs; |
| } |
| |
| int64_t MPEG4Writer::Track::getEstimatedTrackSizeBytes() const { |
| return mEstimatedTrackSizeBytes; |
| } |
| |
| status_t MPEG4Writer::Track::checkCodecSpecificData() const { |
| const char *mime; |
| CHECK(mMeta->findCString(kKeyMIMEType, &mime)); |
| if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AAC, mime) || |
| !strcasecmp(MEDIA_MIMETYPE_VIDEO_MPEG4, mime) || |
| !strcasecmp(MEDIA_MIMETYPE_VIDEO_AVC, mime)) { |
| if (!mCodecSpecificData || |
| mCodecSpecificDataSize <= 0) { |
| LOGE("Missing codec specific data"); |
| return ERROR_MALFORMED; |
| } |
| } else { |
| if (mCodecSpecificData || |
| mCodecSpecificDataSize > 0) { |
| LOGE("Unexepected codec specific data found"); |
| return ERROR_MALFORMED; |
| } |
| } |
| return OK; |
| } |
| |
| void MPEG4Writer::Track::writeTrackHeader(bool use32BitOffset) { |
| |
| LOGV("%s track time scale: %d", |
| mIsAudio? "Audio": "Video", mTimeScale); |
| |
| time_t now = time(NULL); |
| mOwner->beginBox("trak"); |
| writeTkhdBox(now); |
| mOwner->beginBox("mdia"); |
| writeMdhdBox(now); |
| writeHdlrBox(); |
| mOwner->beginBox("minf"); |
| if (mIsAudio) { |
| writeSmhdBox(); |
| } else { |
| writeVmhdBox(); |
| } |
| writeDinfBox(); |
| writeStblBox(use32BitOffset); |
| mOwner->endBox(); // minf |
| mOwner->endBox(); // mdia |
| mOwner->endBox(); // trak |
| } |
| |
| void MPEG4Writer::Track::writeStblBox(bool use32BitOffset) { |
| mOwner->beginBox("stbl"); |
| mOwner->beginBox("stsd"); |
| mOwner->writeInt32(0); // version=0, flags=0 |
| mOwner->writeInt32(1); // entry count |
| if (mIsAudio) { |
| writeAudioFourCCBox(); |
| } else { |
| writeVideoFourCCBox(); |
| } |
| mOwner->endBox(); // stsd |
| writeSttsBox(); |
| if (!mIsAudio) { |
| writeStssBox(); |
| } |
| writeStszBox(); |
| writeStscBox(); |
| writeStcoBox(use32BitOffset); |
| mOwner->endBox(); // stbl |
| } |
| |
| void MPEG4Writer::Track::writeVideoFourCCBox() { |
| const char *mime; |
| bool success = mMeta->findCString(kKeyMIMEType, &mime); |
| CHECK(success); |
| if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_MPEG4, mime)) { |
| mOwner->beginBox("mp4v"); |
| } else if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_H263, mime)) { |
| mOwner->beginBox("s263"); |
| } else if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_AVC, mime)) { |
| mOwner->beginBox("avc1"); |
| } else { |
| LOGE("Unknown mime type '%s'.", mime); |
| CHECK(!"should not be here, unknown mime type."); |
| } |
| |
| mOwner->writeInt32(0); // reserved |
| mOwner->writeInt16(0); // reserved |
| mOwner->writeInt16(1); // data ref index |
| mOwner->writeInt16(0); // predefined |
| mOwner->writeInt16(0); // reserved |
| mOwner->writeInt32(0); // predefined |
| mOwner->writeInt32(0); // predefined |
| mOwner->writeInt32(0); // predefined |
| |
| int32_t width, height; |
| success = mMeta->findInt32(kKeyWidth, &width); |
| success = success && mMeta->findInt32(kKeyHeight, &height); |
| CHECK(success); |
| |
| mOwner->writeInt16(width); |
| mOwner->writeInt16(height); |
| mOwner->writeInt32(0x480000); // horiz resolution |
| mOwner->writeInt32(0x480000); // vert resolution |
| mOwner->writeInt32(0); // reserved |
| mOwner->writeInt16(1); // frame count |
| mOwner->write(" ", 32); |
| mOwner->writeInt16(0x18); // depth |
| mOwner->writeInt16(-1); // predefined |
| |
| CHECK(23 + mCodecSpecificDataSize < 128); |
| |
| if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_MPEG4, mime)) { |
| writeMp4vEsdsBox(); |
| } else if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_H263, mime)) { |
| writeD263Box(); |
| } else if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_AVC, mime)) { |
| writeAvccBox(); |
| } |
| |
| writePaspBox(); |
| mOwner->endBox(); // mp4v, s263 or avc1 |
| } |
| |
| void MPEG4Writer::Track::writeAudioFourCCBox() { |
| const char *mime; |
| bool success = mMeta->findCString(kKeyMIMEType, &mime); |
| CHECK(success); |
| const char *fourcc = NULL; |
| if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AMR_NB, mime)) { |
| fourcc = "samr"; |
| } else if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AMR_WB, mime)) { |
| fourcc = "sawb"; |
| } else if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AAC, mime)) { |
| fourcc = "mp4a"; |
| } else { |
| LOGE("Unknown mime type '%s'.", mime); |
| CHECK(!"should not be here, unknown mime type."); |
| } |
| |
| mOwner->beginBox(fourcc); // audio format |
| mOwner->writeInt32(0); // reserved |
| mOwner->writeInt16(0); // reserved |
| mOwner->writeInt16(0x1); // data ref index |
| mOwner->writeInt32(0); // reserved |
| mOwner->writeInt32(0); // reserved |
| int32_t nChannels; |
| CHECK_EQ(true, mMeta->findInt32(kKeyChannelCount, &nChannels)); |
| mOwner->writeInt16(nChannels); // channel count |
| mOwner->writeInt16(16); // sample size |
| mOwner->writeInt16(0); // predefined |
| mOwner->writeInt16(0); // reserved |
| |
| int32_t samplerate; |
| success = mMeta->findInt32(kKeySampleRate, &samplerate); |
| CHECK(success); |
| mOwner->writeInt32(samplerate << 16); |
| if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AAC, mime)) { |
| writeMp4aEsdsBox(); |
| } else if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AMR_NB, mime) || |
| !strcasecmp(MEDIA_MIMETYPE_AUDIO_AMR_WB, mime)) { |
| writeDamrBox(); |
| } |
| mOwner->endBox(); |
| } |
| |
| void MPEG4Writer::Track::writeMp4aEsdsBox() { |
| mOwner->beginBox("esds"); |
| CHECK(mCodecSpecificData); |
| CHECK(mCodecSpecificDataSize > 0); |
| |
| // Make sure all sizes encode to a single byte. |
| CHECK(mCodecSpecificDataSize + 23 < 128); |
| |
| mOwner->writeInt32(0); // version=0, flags=0 |
| mOwner->writeInt8(0x03); // ES_DescrTag |
| mOwner->writeInt8(23 + mCodecSpecificDataSize); |
| mOwner->writeInt16(0x0000);// ES_ID |
| mOwner->writeInt8(0x00); |
| |
| mOwner->writeInt8(0x04); // DecoderConfigDescrTag |
| mOwner->writeInt8(15 + mCodecSpecificDataSize); |
| mOwner->writeInt8(0x40); // objectTypeIndication ISO/IEC 14492-2 |
| mOwner->writeInt8(0x15); // streamType AudioStream |
| |
| mOwner->writeInt16(0x03); // XXX |
| mOwner->writeInt8(0x00); // buffer size 24-bit |
| mOwner->writeInt32(96000); // max bit rate |
| mOwner->writeInt32(96000); // avg bit rate |
| |
| mOwner->writeInt8(0x05); // DecoderSpecificInfoTag |
| mOwner->writeInt8(mCodecSpecificDataSize); |
| mOwner->write(mCodecSpecificData, mCodecSpecificDataSize); |
| |
| static const uint8_t kData2[] = { |
| 0x06, // SLConfigDescriptorTag |
| 0x01, |
| 0x02 |
| }; |
| mOwner->write(kData2, sizeof(kData2)); |
| |
| mOwner->endBox(); // esds |
| } |
| |
| void MPEG4Writer::Track::writeMp4vEsdsBox() { |
| CHECK(mCodecSpecificData); |
| CHECK(mCodecSpecificDataSize > 0); |
| mOwner->beginBox("esds"); |
| |
| mOwner->writeInt32(0); // version=0, flags=0 |
| |
| mOwner->writeInt8(0x03); // ES_DescrTag |
| mOwner->writeInt8(23 + mCodecSpecificDataSize); |
| mOwner->writeInt16(0x0000); // ES_ID |
| mOwner->writeInt8(0x1f); |
| |
| mOwner->writeInt8(0x04); // DecoderConfigDescrTag |
| mOwner->writeInt8(15 + mCodecSpecificDataSize); |
| mOwner->writeInt8(0x20); // objectTypeIndication ISO/IEC 14492-2 |
| mOwner->writeInt8(0x11); // streamType VisualStream |
| |
| static const uint8_t kData[] = { |
| 0x01, 0x77, 0x00, |
| 0x00, 0x03, 0xe8, 0x00, |
| 0x00, 0x03, 0xe8, 0x00 |
| }; |
| mOwner->write(kData, sizeof(kData)); |
| |
| mOwner->writeInt8(0x05); // DecoderSpecificInfoTag |
| |
| mOwner->writeInt8(mCodecSpecificDataSize); |
| mOwner->write(mCodecSpecificData, mCodecSpecificDataSize); |
| |
| static const uint8_t kData2[] = { |
| 0x06, // SLConfigDescriptorTag |
| 0x01, |
| 0x02 |
| }; |
| mOwner->write(kData2, sizeof(kData2)); |
| |
| mOwner->endBox(); // esds |
| } |
| |
| void MPEG4Writer::Track::writeTkhdBox(time_t now) { |
| mOwner->beginBox("tkhd"); |
| // Flags = 7 to indicate that the track is enabled, and |
| // part of the presentation |
| mOwner->writeInt32(0x07); // version=0, flags=7 |
| mOwner->writeInt32(now); // creation time |
| mOwner->writeInt32(now); // modification time |
| mOwner->writeInt32(mTrackId + 1); // track id starts with 1 |
| mOwner->writeInt32(0); // reserved |
| int64_t trakDurationUs = getDurationUs(); |
| int32_t mvhdTimeScale = mOwner->getTimeScale(); |
| int32_t tkhdDuration = |
| (trakDurationUs * mvhdTimeScale + 5E5) / 1E6; |
| mOwner->writeInt32(tkhdDuration); // in mvhd timescale |
| mOwner->writeInt32(0); // reserved |
| mOwner->writeInt32(0); // reserved |
| mOwner->writeInt16(0); // layer |
| mOwner->writeInt16(0); // alternate group |
| mOwner->writeInt16(mIsAudio ? 0x100 : 0); // volume |
| mOwner->writeInt16(0); // reserved |
| |
| mOwner->writeCompositionMatrix(mRotation); // matrix |
| |
| if (mIsAudio) { |
| mOwner->writeInt32(0); |
| mOwner->writeInt32(0); |
| } else { |
| int32_t width, height; |
| bool success = mMeta->findInt32(kKeyWidth, &width); |
| success = success && mMeta->findInt32(kKeyHeight, &height); |
| CHECK(success); |
| |
| mOwner->writeInt32(width << 16); // 32-bit fixed-point value |
| mOwner->writeInt32(height << 16); // 32-bit fixed-point value |
| } |
| mOwner->endBox(); // tkhd |
| } |
| |
| void MPEG4Writer::Track::writeVmhdBox() { |
| mOwner->beginBox("vmhd"); |
| mOwner->writeInt32(0x01); // version=0, flags=1 |
| mOwner->writeInt16(0); // graphics mode |
| mOwner->writeInt16(0); // opcolor |
| mOwner->writeInt16(0); |
| mOwner->writeInt16(0); |
| mOwner->endBox(); |
| } |
| |
| void MPEG4Writer::Track::writeSmhdBox() { |
| mOwner->beginBox("smhd"); |
| mOwner->writeInt32(0); // version=0, flags=0 |
| mOwner->writeInt16(0); // balance |
| mOwner->writeInt16(0); // reserved |
| mOwner->endBox(); |
| } |
| |
| void MPEG4Writer::Track::writeHdlrBox() { |
| mOwner->beginBox("hdlr"); |
| mOwner->writeInt32(0); // version=0, flags=0 |
| mOwner->writeInt32(0); // component type: should be mhlr |
| mOwner->writeFourcc(mIsAudio ? "soun" : "vide"); // component subtype |
| mOwner->writeInt32(0); // reserved |
| mOwner->writeInt32(0); // reserved |
| mOwner->writeInt32(0); // reserved |
| // Removing "r" for the name string just makes the string 4 byte aligned |
| mOwner->writeCString(mIsAudio ? "SoundHandle": "VideoHandle"); // name |
| mOwner->endBox(); |
| } |
| |
| void MPEG4Writer::Track::writeMdhdBox(time_t now) { |
| int64_t trakDurationUs = getDurationUs(); |
| mOwner->beginBox("mdhd"); |
| mOwner->writeInt32(0); // version=0, flags=0 |
| mOwner->writeInt32(now); // creation time |
| mOwner->writeInt32(now); // modification time |
| mOwner->writeInt32(mTimeScale); // media timescale |
| int32_t mdhdDuration = (trakDurationUs * mTimeScale + 5E5) / 1E6; |
| mOwner->writeInt32(mdhdDuration); // use media timescale |
| // Language follows the three letter standard ISO-639-2/T |
| // 'e', 'n', 'g' for "English", for instance. |
| // Each character is packed as the difference between its ASCII value and 0x60. |
| // For "English", these are 00101, 01110, 00111. |
| // XXX: Where is the padding bit located: 0x15C7? |
| mOwner->writeInt16(0); // language code |
| mOwner->writeInt16(0); // predefined |
| mOwner->endBox(); |
| } |
| |
| void MPEG4Writer::Track::writeDamrBox() { |
| // 3gpp2 Spec AMRSampleEntry fields |
| mOwner->beginBox("damr"); |
| mOwner->writeCString(" "); // vendor: 4 bytes |
| mOwner->writeInt8(0); // decoder version |
| mOwner->writeInt16(0x83FF); // mode set: all enabled |
| mOwner->writeInt8(0); // mode change period |
| mOwner->writeInt8(1); // frames per sample |
| mOwner->endBox(); |
| } |
| |
| void MPEG4Writer::Track::writeUrlBox() { |
| // The table index here refers to the sample description index |
| // in the sample table entries. |
| mOwner->beginBox("url "); |
| mOwner->writeInt32(1); // version=0, flags=1 (self-contained) |
| mOwner->endBox(); // url |
| } |
| |
| void MPEG4Writer::Track::writeDrefBox() { |
| mOwner->beginBox("dref"); |
| mOwner->writeInt32(0); // version=0, flags=0 |
| mOwner->writeInt32(1); // entry count (either url or urn) |
| writeUrlBox(); |
| mOwner->endBox(); // dref |
| } |
| |
| void MPEG4Writer::Track::writeDinfBox() { |
| mOwner->beginBox("dinf"); |
| writeDrefBox(); |
| mOwner->endBox(); // dinf |
| } |
| |
| void MPEG4Writer::Track::writeAvccBox() { |
| CHECK(mCodecSpecificData); |
| CHECK(mCodecSpecificDataSize >= 5); |
| |
| // Patch avcc's lengthSize field to match the number |
| // of bytes we use to indicate the size of a nal unit. |
| uint8_t *ptr = (uint8_t *)mCodecSpecificData; |
| ptr[4] = (ptr[4] & 0xfc) | (mOwner->useNalLengthFour() ? 3 : 1); |
| mOwner->beginBox("avcC"); |
| mOwner->write(mCodecSpecificData, mCodecSpecificDataSize); |
| mOwner->endBox(); // avcC |
| } |
| |
| void MPEG4Writer::Track::writeD263Box() { |
| mOwner->beginBox("d263"); |
| mOwner->writeInt32(0); // vendor |
| mOwner->writeInt8(0); // decoder version |
| mOwner->writeInt8(10); // level: 10 |
| mOwner->writeInt8(0); // profile: 0 |
| mOwner->endBox(); // d263 |
| } |
| |
| // This is useful if the pixel is not square |
| void MPEG4Writer::Track::writePaspBox() { |
| mOwner->beginBox("pasp"); |
| mOwner->writeInt32(1 << 16); // hspacing |
| mOwner->writeInt32(1 << 16); // vspacing |
| mOwner->endBox(); // pasp |
| } |
| |
| void MPEG4Writer::Track::writeSttsBox() { |
| mOwner->beginBox("stts"); |
| mOwner->writeInt32(0); // version=0, flags=0 |
| mOwner->writeInt32(mNumSttsTableEntries); |
| |
| // Compensate for small start time difference from different media tracks |
| int64_t trackStartTimeOffsetUs = 0; |
| int64_t moovStartTimeUs = mOwner->getStartTimestampUs(); |
| if (mStartTimestampUs != moovStartTimeUs) { |
| CHECK(mStartTimestampUs > moovStartTimeUs); |
| trackStartTimeOffsetUs = mStartTimestampUs - moovStartTimeUs; |
| } |
| List<SttsTableEntry>::iterator it = mSttsTableEntries.begin(); |
| CHECK(it != mSttsTableEntries.end() && it->sampleCount == 1); |
| mOwner->writeInt32(it->sampleCount); |
| int32_t dur = (trackStartTimeOffsetUs * mTimeScale + 500000LL) / 1000000LL; |
| mOwner->writeInt32(dur + it->sampleDuration); |
| |
| while (++it != mSttsTableEntries.end()) { |
| mOwner->writeInt32(it->sampleCount); |
| mOwner->writeInt32(it->sampleDuration); |
| } |
| mOwner->endBox(); // stts |
| } |
| |
| void MPEG4Writer::Track::writeStssBox() { |
| mOwner->beginBox("stss"); |
| mOwner->writeInt32(0); // version=0, flags=0 |
| mOwner->writeInt32(mNumStssTableEntries); // number of sync frames |
| for (List<int32_t>::iterator it = mStssTableEntries.begin(); |
| it != mStssTableEntries.end(); ++it) { |
| mOwner->writeInt32(*it); |
| } |
| mOwner->endBox(); // stss |
| } |
| |
| void MPEG4Writer::Track::writeStszBox() { |
| mOwner->beginBox("stsz"); |
| mOwner->writeInt32(0); // version=0, flags=0 |
| if (mSamplesHaveSameSize) { |
| List<size_t>::iterator it = mSampleSizes.begin(); |
| mOwner->writeInt32(*it); // default sample size |
| } else { |
| mOwner->writeInt32(0); |
| } |
| mOwner->writeInt32(mNumSamples); |
| if (!mSamplesHaveSameSize) { |
| for (List<size_t>::iterator it = mSampleSizes.begin(); |
| it != mSampleSizes.end(); ++it) { |
| mOwner->writeInt32(*it); |
| } |
| } |
| mOwner->endBox(); // stsz |
| } |
| |
| void MPEG4Writer::Track::writeStscBox() { |
| mOwner->beginBox("stsc"); |
| mOwner->writeInt32(0); // version=0, flags=0 |
| mOwner->writeInt32(mNumStscTableEntries); |
| for (List<StscTableEntry>::iterator it = mStscTableEntries.begin(); |
| it != mStscTableEntries.end(); ++it) { |
| mOwner->writeInt32(it->firstChunk); |
| mOwner->writeInt32(it->samplesPerChunk); |
| mOwner->writeInt32(it->sampleDescriptionId); |
| } |
| mOwner->endBox(); // stsc |
| } |
| |
| void MPEG4Writer::Track::writeStcoBox(bool use32BitOffset) { |
| mOwner->beginBox(use32BitOffset? "stco": "co64"); |
| mOwner->writeInt32(0); // version=0, flags=0 |
| mOwner->writeInt32(mNumStcoTableEntries); |
| for (List<off64_t>::iterator it = mChunkOffsets.begin(); |
| it != mChunkOffsets.end(); ++it) { |
| if (use32BitOffset) { |
| mOwner->writeInt32(static_cast<int32_t>(*it)); |
| } else { |
| mOwner->writeInt64((*it)); |
| } |
| } |
| mOwner->endBox(); // stco or co64 |
| } |
| |
| void MPEG4Writer::writeUdtaBox() { |
| beginBox("udta"); |
| writeGeoDataBox(); |
| endBox(); |
| } |
| |
| /* |
| * Geodata is stored according to ISO-6709 standard. |
| */ |
| void MPEG4Writer::writeGeoDataBox() { |
| beginBox("\xA9xyz"); |
| /* |
| * For historical reasons, any user data start |
| * with "\0xA9", must be followed by its assoicated |
| * language code. |
| * 0x0012: text string length |
| * 0x15c7: lang (locale) code: en |
| */ |
| writeInt32(0x001215c7); |
| writeLatitude(mLatitudex10000); |
| writeLongitude(mLongitudex10000); |
| writeInt8(0x2F); |
| endBox(); |
| } |
| |
| } // namespace android |