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fuchsia / third_party / android / platform / frameworks / av / refs/tags/android-10.0.0_r8 / . / media / libstagefright / MPEG4Writer.cpp
blob: f130c9b08289eacd657434715102cc4aa9e7245a [file] [log] [blame]
/*
* 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 <algorithm>
#include <arpa/inet.h>
#include <fcntl.h>
#include <inttypes.h>
#include <pthread.h>
#include <sys/prctl.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#include <utils/Log.h>
#include <functional>
#include <media/MediaSource.h>
#include <media/stagefright/foundation/ADebug.h>
#include <media/stagefright/foundation/AMessage.h>
#include <media/stagefright/foundation/AUtils.h>
#include <media/stagefright/foundation/ByteUtils.h>
#include <media/stagefright/foundation/ColorUtils.h>
#include <media/stagefright/foundation/avc_utils.h>
#include <media/stagefright/MPEG4Writer.h>
#include <media/stagefright/MediaBuffer.h>
#include <media/stagefright/MetaData.h>
#include <media/stagefright/MediaDefs.h>
#include <media/stagefright/MediaErrors.h>
#include <media/stagefright/Utils.h>
#include <media/mediarecorder.h>
#include <cutils/properties.h>
#include "include/ESDS.h"
#include "include/HevcUtils.h"
#ifndef __predict_false
#define __predict_false(exp) __builtin_expect((exp) != 0, 0)
#endif
#define WARN_UNLESS(condition, message, ...) \
( (__predict_false(condition)) ? false : ({ \
ALOGW("Condition %s failed " message, #condition, ##__VA_ARGS__); \
true; \
}))
namespace android {
static const int64_t kMinStreamableFileSizeInBytes = 5 * 1024 * 1024;
static const int64_t kMax32BitFileSize = 0x00ffffffffLL; // 2^32-1 : max FAT32
// filesystem file size
// used by most SD cards
static const uint8_t kNalUnitTypeSeqParamSet = 0x07;
static const uint8_t kNalUnitTypePicParamSet = 0x08;
static const int64_t kInitialDelayTimeUs = 700000LL;
static const int64_t kMaxMetadataSize = 0x4000000LL; // 64MB max per-frame metadata size
static const int64_t kMaxCttsOffsetTimeUs = 30 * 60 * 1000000LL; // 30 minutes
static const size_t kESDSScratchBufferSize = 10; // kMaxAtomSize in Mpeg4Extractor 64MB
static const char kMetaKey_Version[] = "com.android.version";
static const char kMetaKey_Manufacturer[] = "com.android.manufacturer";
static const char kMetaKey_Model[] = "com.android.model";
#ifdef SHOW_BUILD
static const char kMetaKey_Build[] = "com.android.build";
#endif
static const char kMetaKey_CaptureFps[] = "com.android.capture.fps";
static const char kMetaKey_TemporalLayerCount[] = "com.android.video.temporal_layers_count";
static const int kTimestampDebugCount = 10;
static const int kItemIdBase = 10000;
static const char kExifHeader[] = {'E', 'x', 'i', 'f', '\0', '\0'};
static const uint8_t kExifApp1Marker[] = {'E', 'x', 'i', 'f', 0xff, 0xe1};
static const uint8_t kMandatoryHevcNalUnitTypes[3] = {
kHevcNalUnitTypeVps,
kHevcNalUnitTypeSps,
kHevcNalUnitTypePps,
};
static const uint8_t kHevcNalUnitTypes[5] = {
kHevcNalUnitTypeVps,
kHevcNalUnitTypeSps,
kHevcNalUnitTypePps,
kHevcNalUnitTypePrefixSei,
kHevcNalUnitTypeSuffixSei,
};
/* uncomment to include build in meta */
//#define SHOW_MODEL_BUILD 1
class MPEG4Writer::Track {
public:
Track(MPEG4Writer *owner, const sp<MediaSource> &source, size_t trackId);
~Track();
status_t start(MetaData *params);
status_t stop(bool stopSource = true);
status_t pause();
bool reachedEOS();
int64_t getDurationUs() const;
int64_t getEstimatedTrackSizeBytes() const;
int32_t getMetaSizeIncrease(int32_t angle, int32_t trackCount) const;
void writeTrackHeader(bool use32BitOffset = true);
int64_t getMinCttsOffsetTimeUs();
void bufferChunk(int64_t timestampUs);
bool isAvc() const { return mIsAvc; }
bool isHevc() const { return mIsHevc; }
bool isHeic() const { return mIsHeic; }
bool isAudio() const { return mIsAudio; }
bool isMPEG4() const { return mIsMPEG4; }
bool usePrefix() const { return mIsAvc || mIsHevc || mIsHeic; }
bool isExifData(MediaBufferBase *buffer, uint32_t *tiffHdrOffset) const;
void addChunkOffset(off64_t offset);
void addItemOffsetAndSize(off64_t offset, size_t size, bool isExif);
void flushItemRefs();
int32_t getTrackId() const { return mTrackId; }
status_t dump(int fd, const Vector<String16>& args) const;
static const char *getFourCCForMime(const char *mime);
const char *getTrackType() const;
void resetInternal();
private:
// A helper class to handle faster write box with table entries
template<class TYPE, unsigned ENTRY_SIZE>
// ENTRY_SIZE: # of values in each entry
struct ListTableEntries {
static_assert(ENTRY_SIZE > 0, "ENTRY_SIZE must be positive");
ListTableEntries(uint32_t elementCapacity)
: mElementCapacity(elementCapacity),
mTotalNumTableEntries(0),
mNumValuesInCurrEntry(0),
mCurrTableEntriesElement(NULL) {
CHECK_GT(mElementCapacity, 0u);
// Ensure no integer overflow on allocation in add().
CHECK_LT(ENTRY_SIZE, UINT32_MAX / mElementCapacity);
}
// Free the allocated memory.
~ListTableEntries() {
while (!mTableEntryList.empty()) {
typename List<TYPE *>::iterator it = mTableEntryList.begin();
delete[] (*it);
mTableEntryList.erase(it);
}
}
// Replace the value at the given position by the given value.
// There must be an existing value at the given position.
// @arg value must be in network byte order
// @arg pos location the value must be in.
void set(const TYPE& value, uint32_t pos) {
CHECK_LT(pos, mTotalNumTableEntries * ENTRY_SIZE);
typename List<TYPE *>::iterator it = mTableEntryList.begin();
uint32_t iterations = (pos / (mElementCapacity * ENTRY_SIZE));
while (it != mTableEntryList.end() && iterations > 0) {
++it;
--iterations;
}
CHECK(it != mTableEntryList.end());
CHECK_EQ(iterations, 0u);
(*it)[(pos % (mElementCapacity * ENTRY_SIZE))] = value;
}
// Get the value at the given position by the given value.
// @arg value the retrieved value at the position in network byte order.
// @arg pos location the value must be in.
// @return true if a value is found.
bool get(TYPE& value, uint32_t pos) const {
if (pos >= mTotalNumTableEntries * ENTRY_SIZE) {
return false;
}
typename List<TYPE *>::iterator it = mTableEntryList.begin();
uint32_t iterations = (pos / (mElementCapacity * ENTRY_SIZE));
while (it != mTableEntryList.end() && iterations > 0) {
++it;
--iterations;
}
CHECK(it != mTableEntryList.end());
CHECK_EQ(iterations, 0u);
value = (*it)[(pos % (mElementCapacity * ENTRY_SIZE))];
return true;
}
// adjusts all values by |adjust(value)|
void adjustEntries(
std::function<void(size_t /* ix */, TYPE(& /* entry */)[ENTRY_SIZE])> update) {
size_t nEntries = mTotalNumTableEntries + mNumValuesInCurrEntry / ENTRY_SIZE;
size_t ix = 0;
for (TYPE *entryArray : mTableEntryList) {
size_t num = std::min(nEntries, (size_t)mElementCapacity);
for (size_t i = 0; i < num; ++i) {
update(ix++, (TYPE(&)[ENTRY_SIZE])(*entryArray));
entryArray += ENTRY_SIZE;
}
nEntries -= num;
}
}
// Store a single value.
// @arg value must be in network byte order.
void add(const TYPE& value) {
CHECK_LT(mNumValuesInCurrEntry, mElementCapacity);
uint32_t nEntries = mTotalNumTableEntries % mElementCapacity;
uint32_t nValues = mNumValuesInCurrEntry % ENTRY_SIZE;
if (nEntries == 0 && nValues == 0) {
mCurrTableEntriesElement = new TYPE[ENTRY_SIZE * mElementCapacity];
CHECK(mCurrTableEntriesElement != NULL);
mTableEntryList.push_back(mCurrTableEntriesElement);
}
uint32_t pos = nEntries * ENTRY_SIZE + nValues;
mCurrTableEntriesElement[pos] = value;
++mNumValuesInCurrEntry;
if ((mNumValuesInCurrEntry % ENTRY_SIZE) == 0) {
++mTotalNumTableEntries;
mNumValuesInCurrEntry = 0;
}
}
// Write out the table entries:
// 1. the number of entries goes first
// 2. followed by the values in the table enties in order
// @arg writer the writer to actual write to the storage
void write(MPEG4Writer *writer) const {
CHECK_EQ(mNumValuesInCurrEntry % ENTRY_SIZE, 0u);
uint32_t nEntries = mTotalNumTableEntries;
writer->writeInt32(nEntries);
for (typename List<TYPE *>::iterator it = mTableEntryList.begin();
it != mTableEntryList.end(); ++it) {
CHECK_GT(nEntries, 0u);
if (nEntries >= mElementCapacity) {
writer->write(*it, sizeof(TYPE) * ENTRY_SIZE, mElementCapacity);
nEntries -= mElementCapacity;
} else {
writer->write(*it, sizeof(TYPE) * ENTRY_SIZE, nEntries);
break;
}
}
}
// Return the number of entries in the table.
uint32_t count() const { return mTotalNumTableEntries; }
private:
uint32_t mElementCapacity; // # entries in an element
uint32_t mTotalNumTableEntries;
uint32_t mNumValuesInCurrEntry; // up to ENTRY_SIZE
TYPE *mCurrTableEntriesElement;
mutable List<TYPE *> mTableEntryList;
DISALLOW_EVIL_CONSTRUCTORS(ListTableEntries);
};
MPEG4Writer *mOwner;
sp<MetaData> mMeta;
sp<MediaSource> mSource;
volatile bool mDone;
volatile bool mPaused;
volatile bool mResumed;
volatile bool mStarted;
bool mIsAvc;
bool mIsHevc;
bool mIsAudio;
bool mIsVideo;
bool mIsHeic;
bool mIsMPEG4;
bool mGotStartKeyFrame;
bool mIsMalformed;
int32_t mTrackId;
int64_t mTrackDurationUs;
int64_t mMaxChunkDurationUs;
int64_t mLastDecodingTimeUs;
int64_t mEstimatedTrackSizeBytes;
int64_t mMdatSizeBytes;
int32_t mTimeScale;
pthread_t mThread;
List<MediaBuffer *> mChunkSamples;
bool mSamplesHaveSameSize;
ListTableEntries<uint32_t, 1> *mStszTableEntries;
ListTableEntries<uint32_t, 1> *mStcoTableEntries;
ListTableEntries<off64_t, 1> *mCo64TableEntries;
ListTableEntries<uint32_t, 3> *mStscTableEntries;
ListTableEntries<uint32_t, 1> *mStssTableEntries;
ListTableEntries<uint32_t, 2> *mSttsTableEntries;
ListTableEntries<uint32_t, 2> *mCttsTableEntries;
ListTableEntries<uint32_t, 3> *mElstTableEntries; // 3columns: segDuration, mediaTime, mediaRate
int64_t mMinCttsOffsetTimeUs;
int64_t mMinCttsOffsetTicks;
int64_t mMaxCttsOffsetTicks;
// Save the last 10 frames' timestamp and frame type for debug.
struct TimestampDebugHelperEntry {
int64_t pts;
int64_t dts;
std::string frameType;
};
std::list<TimestampDebugHelperEntry> mTimestampDebugHelper;
// 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;
int32_t mRotation;
Vector<uint16_t> mProperties;
ItemRefs mDimgRefs;
Vector<uint16_t> mExifList;
uint16_t mImageItemId;
int32_t mIsPrimary;
int32_t mWidth, mHeight;
int32_t mTileWidth, mTileHeight;
int32_t mGridRows, mGridCols;
size_t mNumTiles, mTileIndex;
// Update the audio track's drift information.
void updateDriftTime(const sp<MetaData>& meta);
void dumpTimeStamps();
int64_t getStartTimeOffsetTimeUs() const;
int32_t getStartTimeOffsetScaledTime() const;
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 copyCodecSpecificData(const uint8_t *data, size_t size, size_t minLength = 0);
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);
status_t makeHEVCCodecSpecificData(const uint8_t *data, size_t size);
status_t copyHEVCCodecSpecificData(const uint8_t *data, size_t size);
status_t parseHEVCCodecSpecificData(
const uint8_t *data, size_t size, HevcParameterSets &paramSets);
// 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;
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 addOneCttsTableEntry(size_t sampleCount, int32_t timescaledDur);
void addOneElstTableEntry(uint32_t segmentDuration, int32_t mediaTime,
int16_t mediaRate, int16_t mediaRateFraction);
bool isTrackMalFormed() const;
void sendTrackSummary(bool hasMultipleTracks);
// Write the boxes
void writeStcoBox(bool use32BitOffset);
void writeStscBox();
void writeStszBox();
void writeStssBox();
void writeSttsBox();
void writeCttsBox();
void writeD263Box();
void writePaspBox();
void writeAvccBox();
void writeHvccBox();
void writeUrlBox();
void writeDrefBox();
void writeDinfBox();
void writeDamrBox();
void writeMdhdBox(uint32_t now);
void writeSmhdBox();
void writeVmhdBox();
void writeNmhdBox();
void writeHdlrBox();
void writeTkhdBox(uint32_t now);
void writeColrBox();
void writeMp4aEsdsBox();
void writeMp4vEsdsBox();
void writeAudioFourCCBox();
void writeVideoFourCCBox();
void writeMetadataFourCCBox();
void writeStblBox(bool use32BitOffset);
void writeEdtsBox();
Track(const Track &);
Track &operator=(const Track &);
};
MPEG4Writer::MPEG4Writer(int fd) {
initInternal(dup(fd), true /*isFirstSession*/);
}
MPEG4Writer::~MPEG4Writer() {
reset();
while (!mTracks.empty()) {
List<Track *>::iterator it = mTracks.begin();
delete *it;
(*it) = NULL;
mTracks.erase(it);
}
mTracks.clear();
if (mNextFd != -1) {
close(mNextFd);
}
}
void MPEG4Writer::initInternal(int fd, bool isFirstSession) {
ALOGV("initInternal");
mFd = fd;
mNextFd = -1;
mInitCheck = mFd < 0? NO_INIT: OK;
mInterleaveDurationUs = 1000000;
mStartTimestampUs = -1LL;
mStartTimeOffsetMs = -1;
mStartTimeOffsetBFramesUs = 0;
mPaused = false;
mStarted = false;
mWriterThreadStarted = false;
mSendNotify = false;
// Reset following variables for all the sessions and they will be
// initialized in start(MetaData *param).
mIsRealTimeRecording = true;
mUse4ByteNalLength = true;
mUse32BitOffset = true;
mOffset = 0;
mMdatOffset = 0;
mInMemoryCache = NULL;
mInMemoryCacheOffset = 0;
mInMemoryCacheSize = 0;
mWriteBoxToMemory = false;
mFreeBoxOffset = 0;
mStreamableFile = false;
mTimeScale = -1;
mHasFileLevelMeta = false;
mPrimaryItemId = 0;
mAssociationEntryCount = 0;
mNumGrids = 0;
mHasRefs = false;
// Following variables only need to be set for the first recording session.
// And they will stay the same for all the recording sessions.
if (isFirstSession) {
mMoovExtraSize = 0;
mHasMoovBox = false;
mMetaKeys = new AMessage();
addDeviceMeta();
mLatitudex10000 = 0;
mLongitudex10000 = 0;
mAreGeoTagsAvailable = false;
mSwitchPending = false;
mIsFileSizeLimitExplicitlyRequested = false;
}
// Verify mFd is seekable
off64_t off = lseek64(mFd, 0, SEEK_SET);
if (off < 0) {
ALOGE("cannot seek mFd: %s (%d) %lld", strerror(errno), errno, (long long)mFd);
release();
}
for (List<Track *>::iterator it = mTracks.begin();
it != mTracks.end(); ++it) {
(*it)->resetInternal();
}
}
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", getTrackType());
result.append(buffer);
snprintf(buffer, SIZE, " reached EOS: %s\n",
mReachedEOS? "true": "false");
result.append(buffer);
snprintf(buffer, SIZE, " frames encoded : %d\n", mStszTableEntries->count());
result.append(buffer);
snprintf(buffer, SIZE, " duration encoded : %" PRId64 " us\n", mTrackDurationUs);
result.append(buffer);
::write(fd, result.string(), result.size());
return OK;
}
// static
const char *MPEG4Writer::Track::getFourCCForMime(const char *mime) {
if (mime == NULL) {
return NULL;
}
if (!strncasecmp(mime, "audio/", 6)) {
if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AMR_NB, mime)) {
return "samr";
} else if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AMR_WB, mime)) {
return "sawb";
} else if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AAC, mime)) {
return "mp4a";
}
} else if (!strncasecmp(mime, "video/", 6)) {
if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_MPEG4, mime)) {
return "mp4v";
} else if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_H263, mime)) {
return "s263";
} else if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_AVC, mime)) {
return "avc1";
} else if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_HEVC, mime)) {
return "hvc1";
}
} else if (!strncasecmp(mime, "application/", 12)) {
return "mett";
} else if (!strcasecmp(MEDIA_MIMETYPE_IMAGE_ANDROID_HEIC, mime)) {
return "heic";
} else {
ALOGE("Track (%s) other than video/audio/metadata is not supported", mime);
}
return NULL;
}
status_t MPEG4Writer::addSource(const sp<MediaSource> &source) {
Mutex::Autolock l(mLock);
if (mStarted) {
ALOGE("Attempt to add source AFTER recording is started");
return UNKNOWN_ERROR;
}
CHECK(source.get() != NULL);
const char *mime;
source->getFormat()->findCString(kKeyMIMEType, &mime);
if (Track::getFourCCForMime(mime) == NULL) {
ALOGE("Unsupported mime '%s'", mime);
return ERROR_UNSUPPORTED;
}
// This is a metadata track or the first track of either audio or video
// Go ahead to add the track.
Track *track = new Track(this, source, 1 + mTracks.size());
mTracks.push_back(track);
mHasMoovBox |= !track->isHeic();
mHasFileLevelMeta |= track->isHeic();
return OK;
}
status_t MPEG4Writer::startTracks(MetaData *params) {
if (mTracks.empty()) {
ALOGE("No source added");
return INVALID_OPERATION;
}
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;
}
void MPEG4Writer::addDeviceMeta() {
// add device info and estimate space in 'moov'
char val[PROPERTY_VALUE_MAX];
size_t n;
// meta size is estimated by adding up the following:
// - meta header structures, which occur only once (total 66 bytes)
// - size for each key, which consists of a fixed header (32 bytes),
// plus key length and data length.
mMoovExtraSize += 66;
if (property_get("ro.build.version.release", val, NULL)
&& (n = strlen(val)) > 0) {
mMetaKeys->setString(kMetaKey_Version, val, n + 1);
mMoovExtraSize += sizeof(kMetaKey_Version) + n + 32;
}
if (property_get_bool("media.recorder.show_manufacturer_and_model", false)) {
if (property_get("ro.product.manufacturer", val, NULL)
&& (n = strlen(val)) > 0) {
mMetaKeys->setString(kMetaKey_Manufacturer, val, n + 1);
mMoovExtraSize += sizeof(kMetaKey_Manufacturer) + n + 32;
}
if (property_get("ro.product.model", val, NULL)
&& (n = strlen(val)) > 0) {
mMetaKeys->setString(kMetaKey_Model, val, n + 1);
mMoovExtraSize += sizeof(kMetaKey_Model) + n + 32;
}
}
#ifdef SHOW_MODEL_BUILD
if (property_get("ro.build.display.id", val, NULL)
&& (n = strlen(val)) > 0) {
mMetaKeys->setString(kMetaKey_Build, val, n + 1);
mMoovExtraSize += sizeof(kMetaKey_Build) + n + 32;
}
#endif
}
int64_t MPEG4Writer::estimateFileLevelMetaSize(MetaData *params) {
int32_t rotation;
if (!params || !params->findInt32(kKeyRotation, &rotation)) {
rotation = 0;
}
// base meta size
int64_t metaSize = 12 // meta fullbox header
+ 33 // hdlr box
+ 14 // pitm box
+ 16 // iloc box (fixed size portion)
+ 14 // iinf box (fixed size portion)
+ 32 // iprp box (fixed size protion)
+ 8 // idat box (when empty)
+ 12 // iref box (when empty)
;
for (List<Track *>::iterator it = mTracks.begin();
it != mTracks.end(); ++it) {
if ((*it)->isHeic()) {
metaSize += (*it)->getMetaSizeIncrease(rotation, mTracks.size());
}
}
ALOGV("estimated meta size: %lld", (long long) metaSize);
// Need at least 8-byte padding at the end, otherwise the left-over
// freebox may become malformed
return metaSize + 8;
}
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 / 1000) * bitRate * 6) / 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;
}
// Account for the extra stuff (Geo, meta keys, etc.)
size += mMoovExtraSize;
ALOGI("limits: %" PRId64 "/%" PRId64 " bytes/us, bit rate: %d bps and the"
" estimated moov size %" PRId64 " bytes",
mMaxFileSizeLimitBytes, mMaxFileDurationLimitUs, bitRate, size);
int64_t estimatedSize = factor * size;
CHECK_GE(estimatedSize, 8);
return estimatedSize;
}
status_t MPEG4Writer::start(MetaData *param) {
if (mInitCheck != OK) {
return UNKNOWN_ERROR;
}
mStartMeta = param;
/*
* 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) {
ALOGW("32-bit file size limit (%" PRId64 " bytes) too big. "
"It is changed to %" PRId64 " bytes",
mMaxFileSizeLimitBytes, kMax32BitFileSize);
mMaxFileSizeLimitBytes = kMax32BitFileSize;
}
}
int32_t use2ByteNalLength;
if (param &&
param->findInt32(kKey2ByteNalLength, &use2ByteNalLength) &&
use2ByteNalLength) {
mUse4ByteNalLength = false;
}
int32_t isRealTimeRecording;
if (param && param->findInt32(kKeyRealTimeRecording, &isRealTimeRecording)) {
mIsRealTimeRecording = isRealTimeRecording;
}
mStartTimestampUs = -1;
if (mStarted) {
if (mPaused) {
mPaused = false;
return startTracks(param);
}
return OK;
}
if (!param ||
!param->findInt32(kKeyTimeScale, &mTimeScale)) {
mTimeScale = 1000;
}
CHECK_GT(mTimeScale, 0);
ALOGV("movie time scale: %d", mTimeScale);
/*
* When the requested file size limit is small, the priority
* is to meet the file size limit requirement, rather than
* to make the file streamable. mStreamableFile does not tell
* whether the actual recorded file is streamable or not.
*/
mStreamableFile =
(mMaxFileSizeLimitBytes != 0 &&
mMaxFileSizeLimitBytes >= kMinStreamableFileSizeInBytes);
/*
* mWriteBoxToMemory is true if the amount of data in a file-level meta or
* moov box is smaller than the reserved free space at the beginning of a
* file, AND when the content of the box is constructed. Note that video/
* audio frame data is always written to the file but not in the memory.
*
* Before stop()/reset() is called, mWriteBoxToMemory is always
* false. When reset() is called at the end of a recording session,
* file-level meta and/or moov box needs to be constructed.
*
* 1) Right before the box is constructed, mWriteBoxToMemory to set to
* mStreamableFile so that if the file is intended to be streamable, it
* is set to true; otherwise, it is set to false. When the value is set
* to false, all the content of that box is written immediately to
* the end of the file. When the value is set to true, all the
* content of that box is written to an in-memory cache,
* mInMemoryCache, util the following condition happens. Note
* that the size of the in-memory cache is the same as the
* reserved free space at the beginning of the file.
*
* 2) While the data of the box is written to an in-memory
* cache, the data size is checked against the reserved space.
* If the data size surpasses the reserved space, subsequent box data
* could no longer be hold in the in-memory cache. This also
* indicates that the reserved space was too small. At this point,
* _all_ subsequent box data must be written to the end of the file.
* mWriteBoxToMemory must be set to false to direct the write
* to the file.
*
* 3) If the data size in the box is smaller than the reserved
* space after the box is completely constructed, the in-memory
* cache copy of the box is written to the reserved free space.
* mWriteBoxToMemory is always set to false after all boxes that
* using the in-memory cache have been constructed.
*/
mWriteBoxToMemory = false;
mInMemoryCache = NULL;
mInMemoryCacheOffset = 0;
ALOGV("muxer starting: mHasMoovBox %d, mHasFileLevelMeta %d",
mHasMoovBox, mHasFileLevelMeta);
writeFtypBox(param);
mFreeBoxOffset = mOffset;
if (mInMemoryCacheSize == 0) {
int32_t bitRate = -1;
if (mHasFileLevelMeta) {
mInMemoryCacheSize += estimateFileLevelMetaSize(param);
}
if (mHasMoovBox) {
if (param) {
param->findInt32(kKeyBitRate, &bitRate);
}
mInMemoryCacheSize += estimateMoovBoxSize(bitRate);
}
}
if (mStreamableFile) {
// Reserve a 'free' box only for streamable file
lseek64(mFd, mFreeBoxOffset, SEEK_SET);
writeInt32(mInMemoryCacheSize);
write("free", 4);
mMdatOffset = mFreeBoxOffset + mInMemoryCacheSize;
} else {
mMdatOffset = mOffset;
}
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() {
ALOGW("MPEG4Writer: pause is not supported");
return ERROR_UNSUPPORTED;
}
void MPEG4Writer::stopWriterThread() {
ALOGD("Stopping writer thread");
if (!mWriterThreadStarted) {
return;
}
{
Mutex::Autolock autolock(mLock);
mDone = true;
mChunkReadyCondition.signal();
}
void *dummy;
pthread_join(mThread, &dummy);
mWriterThreadStarted = false;
ALOGD("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) {
ALOGV("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
}
void MPEG4Writer::release() {
close(mFd);
mFd = -1;
if (mNextFd != -1) {
close(mNextFd);
mNextFd = -1;
}
mInitCheck = NO_INIT;
mStarted = false;
free(mInMemoryCache);
mInMemoryCache = NULL;
}
void MPEG4Writer::finishCurrentSession() {
reset(false /* stopSource */);
}
status_t MPEG4Writer::switchFd() {
ALOGV("switchFd");
Mutex::Autolock l(mLock);
if (mSwitchPending) {
return OK;
}
if (mNextFd == -1) {
ALOGW("No FileDescripter for next recording");
return INVALID_OPERATION;
}
mSwitchPending = true;
sp<AMessage> msg = new AMessage(kWhatSwitch, mReflector);
status_t err = msg->post();
return err;
}
status_t MPEG4Writer::reset(bool stopSource) {
if (mInitCheck != OK) {
return OK;
} else {
if (!mWriterThreadStarted ||
!mStarted) {
if (mWriterThreadStarted) {
stopWriterThread();
}
release();
return OK;
}
}
status_t err = OK;
int64_t maxDurationUs = 0;
int64_t minDurationUs = 0x7fffffffffffffffLL;
int32_t nonImageTrackCount = 0;
for (List<Track *>::iterator it = mTracks.begin();
it != mTracks.end(); ++it) {
status_t status = (*it)->stop(stopSource);
if (err == OK && status != OK) {
err = status;
}
// skip image tracks
if ((*it)->isHeic()) continue;
nonImageTrackCount++;
int64_t durationUs = (*it)->getDurationUs();
if (durationUs > maxDurationUs) {
maxDurationUs = durationUs;
}
if (durationUs < minDurationUs) {
minDurationUs = durationUs;
}
}
if (nonImageTrackCount > 1) {
ALOGD("Duration from tracks range is [%" PRId64 ", %" PRId64 "] us",
minDurationUs, maxDurationUs);
}
stopWriterThread();
// Do not write out movie header on error.
if (err != OK) {
release();
return err;
}
// Fix up the size of the 'mdat' chunk.
if (mUse32BitOffset) {
lseek64(mFd, mMdatOffset, SEEK_SET);
uint32_t size = htonl(static_cast<uint32_t>(mOffset - mMdatOffset));
::write(mFd, &size, 4);
} else {
lseek64(mFd, mMdatOffset + 8, SEEK_SET);
uint64_t size = mOffset - mMdatOffset;
size = hton64(size);
::write(mFd, &size, 8);
}
lseek64(mFd, mOffset, SEEK_SET);
// Construct file-level meta and moov box now
mInMemoryCacheOffset = 0;
mWriteBoxToMemory = mStreamableFile;
if (mWriteBoxToMemory) {
// There is no need to allocate in-memory cache
// if the file is not streamable.
mInMemoryCache = (uint8_t *) malloc(mInMemoryCacheSize);
CHECK(mInMemoryCache != NULL);
}
if (mHasFileLevelMeta) {
writeFileLevelMetaBox();
if (mWriteBoxToMemory) {
writeCachedBoxToFile("meta");
} else {
ALOGI("The file meta box is written at the end.");
}
}
if (mHasMoovBox) {
writeMoovBox(maxDurationUs);
// mWriteBoxToMemory could be set to false in
// MPEG4Writer::write() method
if (mWriteBoxToMemory) {
writeCachedBoxToFile("moov");
} else {
ALOGI("The mp4 file will not be streamable.");
}
}
mWriteBoxToMemory = false;
// Free in-memory cache for box writing
if (mInMemoryCache != NULL) {
free(mInMemoryCache);
mInMemoryCache = NULL;
mInMemoryCacheOffset = 0;
}
CHECK(mBoxes.empty());
release();
return err;
}
/*
* Writes currently cached box into file.
*
* Must be called while mWriteBoxToMemory is true, and will not modify
* mWriteBoxToMemory. After the call, remaining cache size will be
* reduced and buffer offset will be set to the beginning of the cache.
*/
void MPEG4Writer::writeCachedBoxToFile(const char *type) {
CHECK(mWriteBoxToMemory);
mWriteBoxToMemory = false;
// Content of the box is saved in the cache, and the in-memory
// box needs to be written to the file in a single shot.
CHECK_LE(mInMemoryCacheOffset + 8, mInMemoryCacheSize);
// Cached box
lseek64(mFd, mFreeBoxOffset, SEEK_SET);
mOffset = mFreeBoxOffset;
write(mInMemoryCache, 1, mInMemoryCacheOffset);
// Free box
lseek64(mFd, mOffset, SEEK_SET);
mFreeBoxOffset = mOffset;
writeInt32(mInMemoryCacheSize - mInMemoryCacheOffset);
write("free", 4);
// Rewind buffering to the beginning, and restore mWriteBoxToMemory flag
mInMemoryCacheSize -= mInMemoryCacheOffset;
mInMemoryCacheOffset = 0;
mWriteBoxToMemory = true;
ALOGV("dumped out %s box, estimated size remaining %lld",
type, (long long)mInMemoryCacheSize);
}
uint32_t MPEG4Writer::getMpeg4Time() {
time_t now = time(NULL);
// MP4 file uses time counting seconds since midnight, Jan. 1, 1904
// while time function returns Unix epoch values which starts
// at 1970-01-01. Lets add the number of seconds between them
static const uint32_t delta = (66 * 365 + 17) * (24 * 60 * 60);
if (now < 0 || uint32_t(now) > UINT32_MAX - delta) {
return 0;
}
uint32_t mpeg4Time = uint32_t(now) + delta;
return mpeg4Time;
}
void MPEG4Writer::writeMvhdBox(int64_t durationUs) {
uint32_t now = getMpeg4Time();
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();
}
writeMoovLevelMetaBox();
// Loop through all the tracks to get the global time offset if there is
// any ctts table appears in a video track.
int64_t minCttsOffsetTimeUs = kMaxCttsOffsetTimeUs;
for (List<Track *>::iterator it = mTracks.begin();
it != mTracks.end(); ++it) {
if (!(*it)->isHeic()) {
minCttsOffsetTimeUs =
std::min(minCttsOffsetTimeUs, (*it)->getMinCttsOffsetTimeUs());
}
}
ALOGI("Ajust the moov start time from %lld us -> %lld us",
(long long)mStartTimestampUs,
(long long)(mStartTimestampUs + minCttsOffsetTimeUs - kMaxCttsOffsetTimeUs));
// Adjust the global start time.
mStartTimestampUs += minCttsOffsetTimeUs - kMaxCttsOffsetTimeUs;
// Add mStartTimeOffsetBFramesUs(-ve or zero) to the duration of first entry in STTS.
mStartTimeOffsetBFramesUs = minCttsOffsetTimeUs - kMaxCttsOffsetTimeUs;
ALOGV("mStartTimeOffsetBFramesUs :%" PRId32, mStartTimeOffsetBFramesUs);
for (List<Track *>::iterator it = mTracks.begin();
it != mTracks.end(); ++it) {
if (!(*it)->isHeic()) {
(*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;
}
if (fileType != OUTPUT_FORMAT_MPEG_4 && fileType != OUTPUT_FORMAT_HEIF) {
writeFourcc("3gp4");
writeInt32(0);
writeFourcc("isom");
writeFourcc("3gp4");
} else {
// Only write "heic" as major brand if the client specified HEIF
// AND we indeed receive some image heic tracks.
if (fileType == OUTPUT_FORMAT_HEIF && mHasFileLevelMeta) {
writeFourcc("heic");
} else {
writeFourcc("mp42");
}
writeInt32(0);
if (mHasFileLevelMeta) {
writeFourcc("mif1");
writeFourcc("heic");
}
if (mHasMoovBox) {
writeFourcc("isom");
writeFourcc("mp42");
}
}
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.
if (property_get_bool("rw.media.record.test", false)) {
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, bool usePrefix,
uint32_t tiffHdrOffset, size_t *bytesWritten) {
off64_t old_offset = mOffset;
if (usePrefix) {
addMultipleLengthPrefixedSamples_l(buffer);
} else {
if (tiffHdrOffset > 0) {
tiffHdrOffset = htonl(tiffHdrOffset);
::write(mFd, &tiffHdrOffset, 4); // exif_tiff_header_offset field
mOffset += 4;
}
::write(mFd,
(const uint8_t *)buffer->data() + buffer->range_offset(),
buffer->range_length());
mOffset += buffer->range_length();
}
*bytesWritten = mOffset - old_offset;
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);
}
}
void MPEG4Writer::addMultipleLengthPrefixedSamples_l(MediaBuffer *buffer) {
const uint8_t *dataStart = (const uint8_t *)buffer->data() + buffer->range_offset();
const uint8_t *currentNalStart = dataStart;
const uint8_t *nextNalStart;
const uint8_t *data = dataStart;
size_t nextNalSize;
size_t searchSize = buffer->range_length();
while (getNextNALUnit(&data, &searchSize, &nextNalStart,
&nextNalSize, true) == OK) {
size_t currentNalSize = nextNalStart - currentNalStart - 4 /* strip start-code */;
MediaBuffer *nalBuf = new MediaBuffer((void *)currentNalStart, currentNalSize);
addLengthPrefixedSample_l(nalBuf);
nalBuf->release();
currentNalStart = nextNalStart;
}
size_t currentNalOffset = currentNalStart - dataStart;
buffer->set_range(buffer->range_offset() + currentNalOffset,
buffer->range_length() - currentNalOffset);
addLengthPrefixedSample_l(buffer);
}
void MPEG4Writer::addLengthPrefixedSample_l(MediaBuffer *buffer) {
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_LT(length, 65536u);
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;
}
}
size_t MPEG4Writer::write(
const void *ptr, size_t size, size_t nmemb) {
const size_t bytes = size * nmemb;
if (mWriteBoxToMemory) {
off64_t boxSize = 8 + mInMemoryCacheOffset + bytes;
if (boxSize > mInMemoryCacheSize) {
// The reserved free space at the beginning of the file is not big
// enough. Boxes should be written to the end of the file from now
// on, but not to the in-memory cache.
// We write partial box that is in the memory to the file first.
for (List<off64_t>::iterator it = mBoxes.begin();
it != mBoxes.end(); ++it) {
(*it) += mOffset;
}
lseek64(mFd, mOffset, SEEK_SET);
::write(mFd, mInMemoryCache, mInMemoryCacheOffset);
::write(mFd, ptr, bytes);
mOffset += (bytes + mInMemoryCacheOffset);
// All subsequent boxes will be written to the end of the file.
mWriteBoxToMemory = false;
} else {
memcpy(mInMemoryCache + mInMemoryCacheOffset, ptr, bytes);
mInMemoryCacheOffset += bytes;
}
} else {
::write(mFd, ptr, size * nmemb);
mOffset += bytes;
}
return bytes;
}
void MPEG4Writer::beginBox(uint32_t id) {
mBoxes.push_back(mWriteBoxToMemory?
mInMemoryCacheOffset: mOffset);
writeInt32(0);
writeInt32(id);
}
void MPEG4Writer::beginBox(const char *fourcc) {
CHECK_EQ(strlen(fourcc), 4u);
mBoxes.push_back(mWriteBoxToMemory?
mInMemoryCacheOffset: mOffset);
writeInt32(0);
writeFourcc(fourcc);
}
void MPEG4Writer::endBox() {
CHECK(!mBoxes.empty());
off64_t offset = *--mBoxes.end();
mBoxes.erase(--mBoxes.end());
if (mWriteBoxToMemory) {
int32_t x = htonl(mInMemoryCacheOffset - offset);
memcpy(mInMemoryCache + 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), 4u);
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;
mMoovExtraSize += 30;
return OK;
}
status_t MPEG4Writer::setCaptureRate(float captureFps) {
if (captureFps <= 0.0f) {
return BAD_VALUE;
}
// Increase moovExtraSize once only irrespective of how many times
// setCaptureRate is called.
bool containsCaptureFps = mMetaKeys->contains(kMetaKey_CaptureFps);
mMetaKeys->setFloat(kMetaKey_CaptureFps, captureFps);
if (!containsCaptureFps) {
mMoovExtraSize += sizeof(kMetaKey_CaptureFps) + 4 + 32;
}
return OK;
}
status_t MPEG4Writer::setTemporalLayerCount(uint32_t layerCount) {
if (layerCount > 9) {
return BAD_VALUE;
}
if (layerCount > 0) {
mMetaKeys->setInt32(kMetaKey_TemporalLayerCount, layerCount);
mMoovExtraSize += sizeof(kMetaKey_TemporalLayerCount) + 4 + 32;
}
return OK;
}
void MPEG4Writer::notifyApproachingLimit() {
Mutex::Autolock autolock(mLock);
// Only notify once.
if (mSendNotify) {
return;
}
ALOGW("Recorded file size is approaching limit %" PRId64 "bytes",
mMaxFileSizeLimitBytes);
notify(MEDIA_RECORDER_EVENT_INFO, MEDIA_RECORDER_INFO_MAX_FILESIZE_APPROACHING, 0);
mSendNotify = true;
}
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>(mInMemoryCacheSize);
for (List<Track *>::iterator it = mTracks.begin();
it != mTracks.end(); ++it) {
nTotalBytesEstimate += (*it)->getEstimatedTrackSizeBytes();
}
if (!mStreamableFile) {
// Add 1024 bytes as error tolerance
return nTotalBytesEstimate + 1024 >= mMaxFileSizeLimitBytes;
}
// 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::approachingFileSizeLimit() {
// No limit
if (mMaxFileSizeLimitBytes == 0) {
return false;
}
int64_t nTotalBytesEstimate = static_cast<int64_t>(mInMemoryCacheSize);
for (List<Track *>::iterator it = mTracks.begin();
it != mTracks.end(); ++it) {
nTotalBytesEstimate += (*it)->getEstimatedTrackSizeBytes();
}
if (!mStreamableFile) {
// Add 1024 bytes as error tolerance
return nTotalBytesEstimate + 1024 >= (90 * mMaxFileSizeLimitBytes) / 100;
}
return (nTotalBytesEstimate >= (90 * 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)->isHeic() && (*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) {
ALOGI("setStartTimestampUs: %" PRId64, timeUs);
CHECK_GE(timeUs, 0LL);
Mutex::Autolock autoLock(mLock);
if (mStartTimestampUs < 0 || mStartTimestampUs > timeUs) {
mStartTimestampUs = timeUs;
ALOGI("Earliest track starting time: %" PRId64, mStartTimestampUs);
}
}
int64_t MPEG4Writer::getStartTimestampUs() {
Mutex::Autolock autoLock(mLock);
return mStartTimestampUs;
}
int32_t MPEG4Writer::getStartTimeOffsetBFramesUs() {
Mutex::Autolock autoLock(mLock);
return mStartTimeOffsetBFramesUs;
}
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),
mGotStartKeyFrame(false),
mIsMalformed(false),
mTrackId(trackId),
mTrackDurationUs(0),
mEstimatedTrackSizeBytes(0),
mSamplesHaveSameSize(true),
mStszTableEntries(new ListTableEntries<uint32_t, 1>(1000)),
mStcoTableEntries(new ListTableEntries<uint32_t, 1>(1000)),
mCo64TableEntries(new ListTableEntries<off64_t, 1>(1000)),
mStscTableEntries(new ListTableEntries<uint32_t, 3>(1000)),
mStssTableEntries(new ListTableEntries<uint32_t, 1>(1000)),
mSttsTableEntries(new ListTableEntries<uint32_t, 2>(1000)),
mCttsTableEntries(new ListTableEntries<uint32_t, 2>(1000)),
mElstTableEntries(new ListTableEntries<uint32_t, 3>(3)), // Reserve 3 rows, a row has 3 items
mMinCttsOffsetTimeUs(0),
mMinCttsOffsetTicks(0),
mMaxCttsOffsetTicks(0),
mCodecSpecificData(NULL),
mCodecSpecificDataSize(0),
mGotAllCodecSpecificData(false),
mReachedEOS(false),
mStartTimestampUs(-1),
mRotation(0),
mDimgRefs("dimg"),
mImageItemId(0),
mIsPrimary(0),
mWidth(0),
mHeight(0),
mTileWidth(0),
mTileHeight(0),
mGridRows(0),
mGridCols(0),
mNumTiles(1),
mTileIndex(0) {
getCodecSpecificDataFromInputFormatIfPossible();
const char *mime;
mMeta->findCString(kKeyMIMEType, &mime);
mIsAvc = !strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_AVC);
mIsHevc = !strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_HEVC);
mIsAudio = !strncasecmp(mime, "audio/", 6);
mIsVideo = !strncasecmp(mime, "video/", 6);
mIsHeic = !strcasecmp(mime, MEDIA_MIMETYPE_IMAGE_ANDROID_HEIC);
mIsMPEG4 = !strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_MPEG4) ||
!strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_AAC);
// store temporal layer count
if (mIsVideo) {
int32_t count;
if (mMeta->findInt32(kKeyTemporalLayerCount, &count) && count > 1) {
mOwner->setTemporalLayerCount(count);
}
}
if (!mIsHeic) {
setTimeScale();
} else {
CHECK(mMeta->findInt32(kKeyWidth, &mWidth) && (mWidth > 0));
CHECK(mMeta->findInt32(kKeyHeight, &mHeight) && (mHeight > 0));
int32_t tileWidth, tileHeight, gridRows, gridCols;
if (mMeta->findInt32(kKeyTileWidth, &tileWidth) && (tileWidth > 0) &&
mMeta->findInt32(kKeyTileHeight, &tileHeight) && (tileHeight > 0) &&
mMeta->findInt32(kKeyGridRows, &gridRows) && (gridRows > 0) &&
mMeta->findInt32(kKeyGridCols, &gridCols) && (gridCols > 0)) {
mTileWidth = tileWidth;
mTileHeight = tileHeight;
mGridRows = gridRows;
mGridCols = gridCols;
mNumTiles = gridRows * gridCols;
}
if (!mMeta->findInt32(kKeyTrackIsDefault, &mIsPrimary)) {
mIsPrimary = false;
}
}
}
// Clear all the internal states except the CSD data.
void MPEG4Writer::Track::resetInternal() {
mDone = false;
mPaused = false;
mResumed = false;
mStarted = false;
mGotStartKeyFrame = false;
mIsMalformed = false;
mTrackDurationUs = 0;
mEstimatedTrackSizeBytes = 0;
mSamplesHaveSameSize = 0;
if (mStszTableEntries != NULL) {
delete mStszTableEntries;
mStszTableEntries = new ListTableEntries<uint32_t, 1>(1000);
}
if (mStcoTableEntries != NULL) {
delete mStcoTableEntries;
mStcoTableEntries = new ListTableEntries<uint32_t, 1>(1000);
}
if (mCo64TableEntries != NULL) {
delete mCo64TableEntries;
mCo64TableEntries = new ListTableEntries<off64_t, 1>(1000);
}
if (mStscTableEntries != NULL) {
delete mStscTableEntries;
mStscTableEntries = new ListTableEntries<uint32_t, 3>(1000);
}
if (mStssTableEntries != NULL) {
delete mStssTableEntries;
mStssTableEntries = new ListTableEntries<uint32_t, 1>(1000);
}
if (mSttsTableEntries != NULL) {
delete mSttsTableEntries;
mSttsTableEntries = new ListTableEntries<uint32_t, 2>(1000);
}
if (mCttsTableEntries != NULL) {
delete mCttsTableEntries;
mCttsTableEntries = new ListTableEntries<uint32_t, 2>(1000);
}
if (mElstTableEntries != NULL) {
delete mElstTableEntries;
mElstTableEntries = new ListTableEntries<uint32_t, 3>(3);
}
mReachedEOS = false;
}
void MPEG4Writer::Track::updateTrackSizeEstimate() {
mEstimatedTrackSizeBytes = mMdatSizeBytes; // media data size
if (!isHeic() && !mOwner->isFileStreamable()) {
uint32_t stcoBoxCount = (mOwner->use32BitFileOffset()
? mStcoTableEntries->count()
: mCo64TableEntries->count());
int64_t stcoBoxSizeBytes = stcoBoxCount * 4;
int64_t stszBoxSizeBytes = mSamplesHaveSameSize? 4: (mStszTableEntries->count() * 4);
// Reserved free space is not large enough to hold
// all meta data and thus wasted.
mEstimatedTrackSizeBytes += mStscTableEntries->count() * 12 + // stsc box size
mStssTableEntries->count() * 4 + // stss box size
mSttsTableEntries->count() * 8 + // stts box size
mCttsTableEntries->count() * 8 + // ctts box size
mElstTableEntries->count() * 12 + // elst box size
stcoBoxSizeBytes + // stco box size
stszBoxSizeBytes; // stsz box size
}
}
void MPEG4Writer::Track::addOneStscTableEntry(
size_t chunkId, size_t sampleId) {
mStscTableEntries->add(htonl(chunkId));
mStscTableEntries->add(htonl(sampleId));
mStscTableEntries->add(htonl(1));
}
void MPEG4Writer::Track::addOneStssTableEntry(size_t sampleId) {
mStssTableEntries->add(htonl(sampleId));
}
void MPEG4Writer::Track::addOneSttsTableEntry(
size_t sampleCount, int32_t duration) {
if (duration == 0) {
ALOGW("0-duration samples found: %zu", sampleCount);
}
mSttsTableEntries->add(htonl(sampleCount));
mSttsTableEntries->add(htonl(duration));
}
void MPEG4Writer::Track::addOneCttsTableEntry(
size_t sampleCount, int32_t duration) {
if (!mIsVideo) {
return;
}
mCttsTableEntries->add(htonl(sampleCount));
mCttsTableEntries->add(htonl(duration));
}
void MPEG4Writer::Track::addOneElstTableEntry(
uint32_t segmentDuration, int32_t mediaTime, int16_t mediaRate, int16_t mediaRateFraction) {
ALOGV("segmentDuration:%u, mediaTime:%d", segmentDuration, mediaTime);
ALOGV("mediaRate :%" PRId16 ", mediaRateFraction :%" PRId16 ", Ored %u", mediaRate,
mediaRateFraction, ((((uint32_t)mediaRate) << 16) | ((uint32_t)mediaRateFraction)));
mElstTableEntries->add(htonl(segmentDuration));
mElstTableEntries->add(htonl(mediaTime));
mElstTableEntries->add(htonl((((uint32_t)mediaRate) << 16) | (uint32_t)mediaRateFraction));
}
status_t MPEG4Writer::setNextFd(int fd) {
ALOGV("addNextFd");
Mutex::Autolock l(mLock);
if (mLooper == NULL) {
mReflector = new AHandlerReflector<MPEG4Writer>(this);
mLooper = new ALooper;
mLooper->registerHandler(mReflector);
mLooper->start();
}
if (mNextFd != -1) {
// No need to set a new FD yet.
return INVALID_OPERATION;
}
mNextFd = dup(fd);
return OK;
}
bool MPEG4Writer::Track::isExifData(
MediaBufferBase *buffer, uint32_t *tiffHdrOffset) const {
if (!mIsHeic) {
return false;
}
// Exif block starting with 'Exif\0\0'
size_t length = buffer->range_length();
uint8_t *data = (uint8_t *)buffer->data() + buffer->range_offset();
if ((length > sizeof(kExifHeader))
&& !memcmp(data, kExifHeader, sizeof(kExifHeader))) {
*tiffHdrOffset = sizeof(kExifHeader);
return true;
}
// Exif block starting with fourcc 'Exif' followed by APP1 marker
if ((length > sizeof(kExifApp1Marker) + 2 + sizeof(kExifHeader))
&& !memcmp(data, kExifApp1Marker, sizeof(kExifApp1Marker))
&& !memcmp(data + sizeof(kExifApp1Marker) + 2, kExifHeader, sizeof(kExifHeader))) {
// skip 'Exif' fourcc
buffer->set_range(4, buffer->range_length() - 4);
// 2-byte APP1 + 2-byte size followed by kExifHeader
*tiffHdrOffset = 2 + 2 + sizeof(kExifHeader);
return true;
}
return false;
}
void MPEG4Writer::Track::addChunkOffset(off64_t offset) {
CHECK(!mIsHeic);
if (mOwner->use32BitFileOffset()) {
uint32_t value = offset;
mStcoTableEntries->add(htonl(value));
} else {
mCo64TableEntries->add(hton64(offset));
}
}
void MPEG4Writer::Track::addItemOffsetAndSize(off64_t offset, size_t size, bool isExif) {
CHECK(mIsHeic);
if (offset > UINT32_MAX || size > UINT32_MAX) {
ALOGE("offset or size is out of range: %lld, %lld",
(long long) offset, (long long) size);
mIsMalformed = true;
}
if (mIsMalformed) {
return;
}
if (isExif) {
mExifList.push_back(mOwner->addItem_l({
.itemType = "Exif",
.isPrimary = false,
.isHidden = false,
.offset = (uint32_t)offset,
.size = (uint32_t)size,
}));
return;
}
if (mTileIndex >= mNumTiles) {
ALOGW("Ignoring excess tiles!");
return;
}
// Rotation angle in HEIF is CCW, framework angle is CW.
int32_t heifRotation = 0;
switch(mRotation) {
case 90: heifRotation = 3; break;
case 180: heifRotation = 2; break;
case 270: heifRotation = 1; break;
default: break; // don't set if invalid
}
bool hasGrid = (mTileWidth > 0);
if (mProperties.empty()) {
mProperties.push_back(mOwner->addProperty_l({
.type = FOURCC('h', 'v', 'c', 'C'),
.hvcc = ABuffer::CreateAsCopy(mCodecSpecificData, mCodecSpecificDataSize)
}));
mProperties.push_back(mOwner->addProperty_l({
.type = FOURCC('i', 's', 'p', 'e'),
.width = hasGrid ? mTileWidth : mWidth,
.height = hasGrid ? mTileHeight : mHeight,
}));
if (!hasGrid && heifRotation > 0) {
mProperties.push_back(mOwner->addProperty_l({
.type = FOURCC('i', 'r', 'o', 't'),
.rotation = heifRotation,
}));
}
}
mTileIndex++;
if (hasGrid) {
mDimgRefs.value.push_back(mOwner->addItem_l({
.itemType = "hvc1",
.isPrimary = false,
.isHidden = true,
.offset = (uint32_t)offset,
.size = (uint32_t)size,
.properties = mProperties,
}));
if (mTileIndex == mNumTiles) {
mProperties.clear();
mProperties.push_back(mOwner->addProperty_l({
.type = FOURCC('i', 's', 'p', 'e'),
.width = mWidth,
.height = mHeight,
}));
if (heifRotation > 0) {
mProperties.push_back(mOwner->addProperty_l({
.type = FOURCC('i', 'r', 'o', 't'),
.rotation = heifRotation,
}));
}
mImageItemId = mOwner->addItem_l({
.itemType = "grid",
.isPrimary = (mIsPrimary != 0),
.isHidden = false,
.rows = (uint32_t)mGridRows,
.cols = (uint32_t)mGridCols,
.width = (uint32_t)mWidth,
.height = (uint32_t)mHeight,
.properties = mProperties,
});
}
} else {
mImageItemId = mOwner->addItem_l({
.itemType = "hvc1",
.isPrimary = (mIsPrimary != 0),
.isHidden = false,
.offset = (uint32_t)offset,
.size = (uint32_t)size,
.properties = mProperties,
});
}
}
// Flush out the item refs for this track. Note that it must be called after the
// writer thread has stopped, because there might be pending items in the last
// few chunks written by the writer thread (as opposed to the track). In particular,
// it affects the 'dimg' refs for tiled image, as we only have the refs after the
// last tile sample is written.
void MPEG4Writer::Track::flushItemRefs() {
CHECK(mIsHeic);
if (mImageItemId > 0) {
mOwner->addRefs_l(mImageItemId, mDimgRefs);
if (!mExifList.empty()) {
// The "cdsc" ref is from the metadata/exif item to the image item.
// So the refs all contain the image item.
ItemRefs cdscRefs("cdsc");
cdscRefs.value.push_back(mImageItemId);
for (uint16_t exifItem : mExifList) {
mOwner->addRefs_l(exifItem, cdscRefs);
}
}
}
}
void MPEG4Writer::Track::setTimeScale() {
ALOGV("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_GT(mTimeScale, 0);
}
void MPEG4Writer::onMessageReceived(const sp<AMessage> &msg) {
switch (msg->what()) {
case kWhatSwitch:
{
mLock.lock();
int fd = mNextFd;
mNextFd = -1;
mLock.unlock();
finishCurrentSession();
initInternal(fd, false /*isFirstSession*/);
start(mStartMeta.get());
mSwitchPending = false;
notify(MEDIA_RECORDER_EVENT_INFO, MEDIA_RECORDER_INFO_NEXT_OUTPUT_FILE_STARTED, 0);
break;
}
default:
TRESPASS();
}
}
void MPEG4Writer::Track::getCodecSpecificDataFromInputFormatIfPossible() {
const char *mime;
CHECK(mMeta->findCString(kKeyMIMEType, &mime));
uint32_t type;
const void *data = NULL;
size_t size = 0;
if (!strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_AVC)) {
mMeta->findData(kKeyAVCC, &type, &data, &size);
} else if (!strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_HEVC) ||
!strcasecmp(mime, MEDIA_MIMETYPE_IMAGE_ANDROID_HEIC)) {
mMeta->findData(kKeyHVCC, &type, &data, &size);
} else if (!strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_MPEG4)
|| !strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_AAC)) {
if (mMeta->findData(kKeyESDS, &type, &data, &size)) {
ESDS esds(data, size);
if (esds.getCodecSpecificInfo(&data, &size) == OK &&
data != NULL &&
copyCodecSpecificData((uint8_t*)data, size) == OK) {
mGotAllCodecSpecificData = true;
}
return;
}
}
if (data != NULL && copyCodecSpecificData((uint8_t *)data, size) == OK) {
mGotAllCodecSpecificData = true;
}
}
MPEG4Writer::Track::~Track() {
stop();
delete mStszTableEntries;
delete mStcoTableEntries;
delete mCo64TableEntries;
delete mStscTableEntries;
delete mSttsTableEntries;
delete mStssTableEntries;
delete mCttsTableEntries;
delete mElstTableEntries;
mStszTableEntries = NULL;
mStcoTableEntries = NULL;
mCo64TableEntries = NULL;
mStscTableEntries = NULL;
mSttsTableEntries = NULL;
mStssTableEntries = NULL;
mCttsTableEntries = NULL;
mElstTableEntries = NULL;
if (mCodecSpecificData != NULL) {
free(mCodecSpecificData);
mCodecSpecificData = NULL;
}
}
void MPEG4Writer::Track::initTrackingProgressStatus(MetaData *params) {
ALOGV("initTrackingProgressStatus");
mPreviousTrackTimeUs = -1;
mTrackingProgressStatus = false;
mTrackEveryTimeDurationUs = 0;
{
int64_t timeUs;
if (params && params->findInt64(kKeyTrackTimeStatus, &timeUs)) {
ALOGV("Receive request to track progress status for every %" PRId64 " us", timeUs);
mTrackEveryTimeDurationUs = timeUs;
mTrackingProgressStatus = true;
}
}
}
// static
void *MPEG4Writer::ThreadWrapper(void *me) {
ALOGV("ThreadWrapper: %p", me);
MPEG4Writer *writer = static_cast<MPEG4Writer *>(me);
writer->threadFunc();
return NULL;
}
void MPEG4Writer::bufferChunk(const Chunk& chunk) {
ALOGV("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");
}
void MPEG4Writer::writeChunkToFile(Chunk* chunk) {
ALOGV("writeChunkToFile: %" PRId64 " from %s track",
chunk->mTimeStampUs, chunk->mTrack->getTrackType());
int32_t isFirstSample = true;
while (!chunk->mSamples.empty()) {
List<MediaBuffer *>::iterator it = chunk->mSamples.begin();
uint32_t tiffHdrOffset;
if (!(*it)->meta_data().findInt32(
kKeyExifTiffOffset, (int32_t*)&tiffHdrOffset)) {
tiffHdrOffset = 0;
}
bool isExif = (tiffHdrOffset > 0);
bool usePrefix = chunk->mTrack->usePrefix() && !isExif;
size_t bytesWritten;
off64_t offset = addSample_l(*it, usePrefix, tiffHdrOffset, &bytesWritten);
if (chunk->mTrack->isHeic()) {
chunk->mTrack->addItemOffsetAndSize(offset, bytesWritten, isExif);
} else if (isFirstSample) {
chunk->mTrack->addChunkOffset(offset);
isFirstSample = false;
}
(*it)->release();
(*it) = NULL;
chunk->mSamples.erase(it);
}
chunk->mSamples.clear();
}
void MPEG4Writer::writeAllChunks() {
ALOGV("writeAllChunks");
size_t outstandingChunks = 0;
Chunk chunk;
while (findChunkToWrite(&chunk)) {
writeChunkToFile(&chunk);
++outstandingChunks;
}
sendSessionSummary();
mChunkInfos.clear();
ALOGD("%zu chunks are written in the last batch", outstandingChunks);
}
bool MPEG4Writer::findChunkToWrite(Chunk *chunk) {
ALOGV("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) {
ALOGV("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() {
ALOGV("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);
}
// In real time recording mode, write without holding the lock in order
// to reduce the blocking time for media track threads.
// Otherwise, hold the lock until the existing chunks get written to the
// file.
if (chunkFound) {
if (mIsRealTimeRecording) {
mLock.unlock();
}
writeChunkToFile(&chunk);
if (mIsRealTimeRecording) {
mLock.lock();
}
}
}
writeAllChunks();
}
status_t MPEG4Writer::startWriterThread() {
ALOGV("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);
mWriterThreadStarted = true;
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 ((mIsVideo || mIsHeic) && params &&
params->findInt32(kKeyRotation, &rotationDegrees)) {
mRotation = rotationDegrees;
}
initTrackingProgressStatus(params);
sp<MetaData> meta = new MetaData;
if (mOwner->isRealTimeRecording() && 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;
ALOGI("Start time offset: %" PRId64 " 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;
mMdatSizeBytes = 0;
mMaxChunkDurationUs = 0;
mLastDecodingTimeUs = -1;
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(bool stopSource) {
ALOGD("%s track stopping. %s source", getTrackType(), stopSource ? "Stop" : "Not Stop");
if (!mStarted) {
ALOGE("Stop() called but track is not started");
return ERROR_END_OF_STREAM;
}
if (mDone) {
return OK;
}
if (stopSource) {
ALOGD("%s track source stopping", getTrackType());
mSource->stop();
ALOGD("%s track source stopped", getTrackType());
}
// Set mDone to be true after sucessfully stop mSource as mSource may be still outputting
// buffers to the writer.
mDone = true;
void *dummy;
pthread_join(mThread, &dummy);
status_t err = static_cast<status_t>(reinterpret_cast<uintptr_t>(dummy));
ALOGD("%s track stopped. %s source", getTrackType(), stopSource ? "Stop" : "Not Stop");
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 *)(uintptr_t)err;
}
static void getNalUnitType(uint8_t byte, uint8_t* type) {
ALOGV("getNalUnitType: %d", byte);
// nal_unit_type: 5-bit unsigned integer
*type = (byte & 0x1F);
}
const uint8_t *MPEG4Writer::Track::parseParamSet(
const uint8_t *data, size_t length, int type, size_t *paramSetLen) {
ALOGV("parseParamSet");
CHECK(type == kNalUnitTypeSeqParamSet ||
type == kNalUnitTypePicParamSet);
const uint8_t *nextStartCode = findNextNalStartCode(data, length);
*paramSetLen = nextStartCode - data;
if (*paramSetLen == 0) {
ALOGE("Param set is malformed, since its length is 0");
return NULL;
}
AVCParamSet paramSet(*paramSetLen, data);
if (type == kNalUnitTypeSeqParamSet) {
if (*paramSetLen < 4) {
ALOGE("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]) {
// COULD DO: set profile/level to the lowest required to support all SPSs
ALOGE("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) {
ALOGV("copyAVCCodecSpecificData");
// 2 bytes for each of the parameter set length field
// plus the 7 bytes for the header
return copyCodecSpecificData(data, size, 4 + 7);
}
status_t MPEG4Writer::Track::copyHEVCCodecSpecificData(
const uint8_t *data, size_t size) {
ALOGV("copyHEVCCodecSpecificData");
// Min length of HEVC CSD is 23. (ISO/IEC 14496-15:2014 Chapter 8.3.3.1.2)
return copyCodecSpecificData(data, size, 23);
}
status_t MPEG4Writer::Track::copyCodecSpecificData(
const uint8_t *data, size_t size, size_t minLength) {
if (size < minLength) {
ALOGE("Codec specific data length too short: %zu", size);
return ERROR_MALFORMED;
}
mCodecSpecificData = malloc(size);
if (mCodecSpecificData == NULL) {
ALOGE("Failed allocating codec specific data");
return NO_MEMORY;
}
mCodecSpecificDataSize = size;
memcpy(mCodecSpecificData, data, size);
return OK;
}
status_t MPEG4Writer::Track::parseAVCCodecSpecificData(
const uint8_t *data, size_t size) {
ALOGV("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) {
ALOGE("SPS must come before PPS");
return ERROR_MALFORMED;
}
if (!gotSps) {
gotSps = true;
}
nextStartCode = parseParamSet(tmp + 4, bytesLeft - 4, type, &paramSetLen);
} else if (type == kNalUnitTypePicParamSet) {
if (!gotSps) {
ALOGE("SPS must come before PPS");
return ERROR_MALFORMED;
}
if (!gotPps) {
gotPps = true;
}
nextStartCode = parseParamSet(tmp + 4, bytesLeft - 4, type, &paramSetLen);
} else {
ALOGE("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) {
ALOGE("Cound not find sequence parameter set");
return ERROR_MALFORMED;
}
if (nSeqParamSets > 0x1F) {
ALOGE("Too many seq parameter sets (%zu) found", nSeqParamSets);
return ERROR_MALFORMED;
}
}
{
// Check on the number of pic parameter sets
size_t nPicParamSets = mPicParamSets.size();
if (nPicParamSets == 0) {
ALOGE("Cound not find picture parameter set");
return ERROR_MALFORMED;
}
if (nPicParamSets > 0xFF) {
ALOGE("Too many pic parameter sets (%zd) found", nPicParamSets);
return ERROR_MALFORMED;
}
}
// FIXME:
// Add chromat_format_idc, bit depth values, etc for AVC/h264 high profile and above
// and remove #if 0
#if 0
{
// Check on the profiles
// These profiles requires additional parameter set extensions
if (mProfileIdc == 100 || mProfileIdc == 110 ||
mProfileIdc == 122 || mProfileIdc == 144) {
ALOGE("Sorry, no support for profile_idc: %d!", mProfileIdc);
return BAD_VALUE;
}
}
#endif
return OK;
}
status_t MPEG4Writer::Track::makeAVCCodecSpecificData(
const uint8_t *data, size_t size) {
if (mCodecSpecificData != NULL) {
ALOGE("Already have codec specific data");
return ERROR_MALFORMED;
}
if (size < 4) {
ALOGE("Codec specific data length too short: %zu", 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);
if (mCodecSpecificData == NULL) {
mCodecSpecificDataSize = 0;
ALOGE("Failed allocating codec specific data");
return NO_MEMORY;
}
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;
}
status_t MPEG4Writer::Track::parseHEVCCodecSpecificData(
const uint8_t *data, size_t size, HevcParameterSets &paramSets) {
ALOGV("parseHEVCCodecSpecificData");
const uint8_t *tmp = data;
const uint8_t *nextStartCode = data;
size_t bytesLeft = size;
while (bytesLeft > 4 && !memcmp("\x00\x00\x00\x01", tmp, 4)) {
nextStartCode = findNextNalStartCode(tmp + 4, bytesLeft - 4);
status_t err = paramSets.addNalUnit(tmp + 4, (nextStartCode - tmp) - 4);
if (err != OK) {
return ERROR_MALFORMED;
}
// Move on to find the next parameter set
bytesLeft -= nextStartCode - tmp;
tmp = nextStartCode;
}
size_t csdSize = 23;
const size_t numNalUnits = paramSets.getNumNalUnits();
for (size_t i = 0; i < ARRAY_SIZE(kMandatoryHevcNalUnitTypes); ++i) {
int type = kMandatoryHevcNalUnitTypes[i];
size_t numParamSets = paramSets.getNumNalUnitsOfType(type);
if (numParamSets == 0) {
ALOGE("Cound not find NAL unit of type %d", type);
return ERROR_MALFORMED;
}
}
for (size_t i = 0; i < ARRAY_SIZE(kHevcNalUnitTypes); ++i) {
int type = kHevcNalUnitTypes[i];
size_t numParamSets = paramSets.getNumNalUnitsOfType(type);
if (numParamSets > 0xffff) {
ALOGE("Too many seq parameter sets (%zu) found", numParamSets);
return ERROR_MALFORMED;
}
csdSize += 3;
for (size_t j = 0; j < numNalUnits; ++j) {
if (paramSets.getType(j) != type) {
continue;
}
csdSize += 2 + paramSets.getSize(j);
}
}
mCodecSpecificDataSize = csdSize;
return OK;
}
status_t MPEG4Writer::Track::makeHEVCCodecSpecificData(
const uint8_t *data, size_t size) {
if (mCodecSpecificData != NULL) {
ALOGE("Already have codec specific data");
return ERROR_MALFORMED;
}
if (size < 4) {
ALOGE("Codec specific data length too short: %zu", size);
return ERROR_MALFORMED;
}
// Data is in the form of HEVCCodecSpecificData
if (memcmp("\x00\x00\x00\x01", data, 4)) {
return copyHEVCCodecSpecificData(data, size);
}
HevcParameterSets paramSets;
if (parseHEVCCodecSpecificData(data, size, paramSets) != OK) {
ALOGE("failed parsing codec specific data");
return ERROR_MALFORMED;
}
mCodecSpecificData = malloc(mCodecSpecificDataSize);
if (mCodecSpecificData == NULL) {
mCodecSpecificDataSize = 0;
ALOGE("Failed allocating codec specific data");
return NO_MEMORY;
}
status_t err = paramSets.makeHvcc((uint8_t *)mCodecSpecificData,
&mCodecSpecificDataSize, mOwner->useNalLengthFour() ? 4 : 2);
if (err != OK) {
ALOGE("failed constructing HVCC atom");
return err;
}
return OK;
}
/*
* 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);
}
}
void MPEG4Writer::Track::dumpTimeStamps() {
if (!mTimestampDebugHelper.empty()) {
std::string timeStampString = "Dumping " + std::string(getTrackType()) + " track's last " +
std::to_string(mTimestampDebugHelper.size()) +
" frames' timestamps(pts, dts) and frame type : ";
for (const TimestampDebugHelperEntry& entry : mTimestampDebugHelper) {
timeStampString += "\n(" + std::to_string(entry.pts) + "us, " +
std::to_string(entry.dts) + "us " + entry.frameType + ") ";
}
ALOGE("%s", timeStampString.c_str());
} else {
ALOGE("0 frames to dump timeStamps in %s track ", getTrackType());
}
}
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 nActualFrames = 0; // frames containing non-CSD data (non-0 length)
int32_t nZeroLengthFrames = 0;
int64_t lastTimestampUs = 0; // Previous sample time stamp
int64_t lastDurationUs = 0; // Between the previous two samples
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 = 0;
int64_t cttsOffsetTimeUs = 0;
int64_t currCttsOffsetTimeTicks = 0; // Timescale based ticks
int64_t lastCttsOffsetTimeTicks = -1; // Timescale based ticks
int32_t cttsSampleCount = 0; // Sample count in the current ctts table entry
uint32_t lastSamplesPerChunk = 0;
if (mIsAudio) {
prctl(PR_SET_NAME, (unsigned long)"AudioTrackEncoding", 0, 0, 0);
} else if (mIsVideo) {
prctl(PR_SET_NAME, (unsigned long)"VideoTrackEncoding", 0, 0, 0);
} else {
prctl(PR_SET_NAME, (unsigned long)"MetadataTrackEncoding", 0, 0, 0);
}
if (mOwner->isRealTimeRecording()) {
androidSetThreadPriority(0, ANDROID_PRIORITY_AUDIO);
}
sp<MetaData> meta_data;
status_t err = OK;
MediaBufferBase *buffer;
const char *trackName = getTrackType();
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) {
// if config format (at track addition) already had CSD, keep that
// UNLESS we have not received any frames yet.
// TODO: for now the entire CSD has to come in one frame for encoders, even though
// they need to be spread out for decoders.
if (mGotAllCodecSpecificData && nActualFrames > 0) {
ALOGI("ignoring additional CSD for video track after first frame");
} else {
mMeta = mSource->getFormat(); // get output format after format change
status_t err;
if (mIsAvc) {
err = makeAVCCodecSpecificData(
(const uint8_t *)buffer->data()
+ buffer->range_offset(),
buffer->range_length());
} else if (mIsHevc || mIsHeic) {
err = makeHEVCCodecSpecificData(
(const uint8_t *)buffer->data()
+ buffer->range_offset(),
buffer->range_length());
} else if (mIsMPEG4) {
copyCodecSpecificData((const uint8_t *)buffer->data() + buffer->range_offset(),
buffer->range_length());
}
}
buffer->release();
buffer = NULL;
if (OK != err) {
mSource->stop();
mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_ERROR,
mTrackId | MEDIA_RECORDER_TRACK_ERROR_GENERAL, err);
break;
}
mGotAllCodecSpecificData = true;
continue;
}
// Per-frame metadata sample's size must be smaller than max allowed.
if (!mIsVideo && !mIsAudio && !mIsHeic &&
buffer->range_length() >= kMaxMetadataSize) {
ALOGW("Buffer size is %zu. Maximum metadata buffer size is %lld for %s track",
buffer->range_length(), (long long)kMaxMetadataSize, trackName);
buffer->release();
mSource->stop();
mIsMalformed = true;
break;
}
bool isExif = false;
uint32_t tiffHdrOffset = 0;
int32_t isMuxerData;
if (buffer->meta_data().findInt32(kKeyIsMuxerData, &isMuxerData) && isMuxerData) {
// We only support one type of muxer data, which is Exif data block.
isExif = isExifData(buffer, &tiffHdrOffset);
if (!isExif) {
ALOGW("Ignoring bad Exif data block");
buffer->release();
buffer = NULL;
continue;
}
}
++nActualFrames;
// 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());
buffer->release();
buffer = NULL;
if (isExif) {
copy->meta_data().setInt32(kKeyExifTiffOffset, tiffHdrOffset);
}
bool usePrefix = this->usePrefix() && !isExif;
if (usePrefix) StripStartcode(copy);
size_t sampleSize = copy->range_length();
if (usePrefix) {
if (mOwner->useNalLengthFour()) {
sampleSize += 4;
} else {
sampleSize += 2;
}
}
// Max file size or duration handling
mMdatSizeBytes += sampleSize;
updateTrackSizeEstimate();
if (mOwner->exceedsFileSizeLimit()) {
if (mOwner->switchFd() != OK) {
ALOGW("Recorded file size exceeds limit %" PRId64 "bytes",
mOwner->mMaxFileSizeLimitBytes);
mSource->stop();
mOwner->notify(
MEDIA_RECORDER_EVENT_INFO, MEDIA_RECORDER_INFO_MAX_FILESIZE_REACHED, 0);
} else {
ALOGV("%s Current recorded file size exceeds limit %" PRId64 "bytes. Switching output",
getTrackType(), mOwner->mMaxFileSizeLimitBytes);
}
copy->release();
break;
}
if (mOwner->exceedsFileDurationLimit()) {
ALOGW("Recorded file duration exceeds limit %" PRId64 "microseconds",
mOwner->mMaxFileDurationLimitUs);
mOwner->notify(MEDIA_RECORDER_EVENT_INFO, MEDIA_RECORDER_INFO_MAX_DURATION_REACHED, 0);
copy->release();
mSource->stop();
break;
}
if (mOwner->approachingFileSizeLimit()) {
mOwner->notifyApproachingLimit();
}
int32_t isSync = false;
meta_data->findInt32(kKeyIsSyncFrame, &isSync);
CHECK(meta_data->findInt64(kKeyTime, &timestampUs));
// For video, skip the first several non-key frames until getting the first key frame.
if (mIsVideo && !mGotStartKeyFrame && !isSync) {
ALOGD("Video skip non-key frame");
copy->release();
continue;
}
if (mIsVideo && isSync) {
mGotStartKeyFrame = true;
}
////////////////////////////////////////////////////////////////////////////////
if (!mIsHeic) {
if (mStszTableEntries->count() == 0) {
mFirstSampleTimeRealUs = systemTime() / 1000;
mOwner->setStartTimestampUs(timestampUs);
mStartTimestampUs = timestampUs;
previousPausedDurationUs = mStartTimestampUs;
}
if (mResumed) {
int64_t durExcludingEarlierPausesUs = timestampUs - previousPausedDurationUs;
if (WARN_UNLESS(durExcludingEarlierPausesUs >= 0LL, "for %s track", trackName)) {
copy->release();
mSource->stop();
mIsMalformed = true;
break;
}
int64_t pausedDurationUs = durExcludingEarlierPausesUs - mTrackDurationUs;
if (WARN_UNLESS(pausedDurationUs >= lastDurationUs, "for %s track", trackName)) {
copy->release();
mSource->stop();
mIsMalformed = true;
break;
}
previousPausedDurationUs += pausedDurationUs - lastDurationUs;
mResumed = false;
}
TimestampDebugHelperEntry timestampDebugEntry;
timestampUs -= previousPausedDurationUs;
timestampDebugEntry.pts = timestampUs;
if (WARN_UNLESS(timestampUs >= 0LL, "for %s track", trackName)) {
copy->release();
mSource->stop();
mIsMalformed = true;
break;
}
if (mIsVideo) {
/*
* Composition time: timestampUs
* Decoding time: decodingTimeUs
* Composition time offset = composition time - decoding time
*/
int64_t decodingTimeUs;
CHECK(meta_data->findInt64(kKeyDecodingTime, &decodingTimeUs));
decodingTimeUs -= previousPausedDurationUs;
// ensure non-negative, monotonic decoding time
if (mLastDecodingTimeUs < 0) {
decodingTimeUs = std::max((int64_t)0, decodingTimeUs);
} else {
// increase decoding time by at least the larger vaule of 1 tick and
// 0.1 milliseconds. This needs to take into account the possible
// delta adjustment in DurationTicks in below.
decodingTimeUs = std::max(mLastDecodingTimeUs +
std::max(100, divUp(1000000, mTimeScale)), decodingTimeUs);
}
mLastDecodingTimeUs = decodingTimeUs;
timestampDebugEntry.dts = decodingTimeUs;
timestampDebugEntry.frameType = isSync ? "Key frame" : "Non-Key frame";
// Insert the timestamp into the mTimestampDebugHelper
if (mTimestampDebugHelper.size() >= kTimestampDebugCount) {
mTimestampDebugHelper.pop_front();
}
mTimestampDebugHelper.push_back(timestampDebugEntry);
cttsOffsetTimeUs =
timestampUs + kMaxCttsOffsetTimeUs - decodingTimeUs;
if (WARN_UNLESS(cttsOffsetTimeUs >= 0LL, "for %s track", trackName)) {
copy->release();
mSource->stop();
mIsMalformed = true;
break;
}
timestampUs = decodingTimeUs;
ALOGV("decoding time: %" PRId64 " and ctts offset time: %" PRId64,
timestampUs, cttsOffsetTimeUs);
// Update ctts box table if necessary
currCttsOffsetTimeTicks =
(cttsOffsetTimeUs * mTimeScale + 500000LL) / 1000000LL;
if (WARN_UNLESS(currCttsOffsetTimeTicks <= 0x0FFFFFFFFLL, "for %s track", trackName)) {
copy->release();
mSource->stop();
mIsMalformed = true;
break;
}
if (mStszTableEntries->count() == 0) {
// Force the first ctts table entry to have one single entry
// so that we can do adjustment for the initial track start
// time offset easily in writeCttsBox().
lastCttsOffsetTimeTicks = currCttsOffsetTimeTicks;
addOneCttsTableEntry(1, currCttsOffsetTimeTicks);
cttsSampleCount = 0; // No sample in ctts box is pending
} else {
if (currCttsOffsetTimeTicks != lastCttsOffsetTimeTicks) {
addOneCttsTableEntry(cttsSampleCount, lastCttsOffsetTimeTicks);
lastCttsOffsetTimeTicks = currCttsOffsetTimeTicks;
cttsSampleCount = 1; // One sample in ctts box is pending
} else {
++cttsSampleCount;
}
}
// Update ctts time offset range
if (mStszTableEntries->count() == 0) {
mMinCttsOffsetTicks = currCttsOffsetTimeTicks;
mMaxCttsOffsetTicks = currCttsOffsetTimeTicks;
} else {
if (currCttsOffsetTimeTicks > mMaxCttsOffsetTicks) {
mMaxCttsOffsetTicks = currCttsOffsetTimeTicks;
} else if (currCttsOffsetTimeTicks < mMinCttsOffsetTicks) {
mMinCttsOffsetTicks = currCttsOffsetTimeTicks;
mMinCttsOffsetTimeUs = cttsOffsetTimeUs;
}
}
}
if (mOwner->isRealTimeRecording()) {
if (mIsAudio) {
updateDriftTime(meta_data);
}
}
if (WARN_UNLESS(timestampUs >= 0LL, "for %s track", trackName)) {
copy->release();
mSource->stop();
mIsMalformed = true;
break;
}
ALOGV("%s media time stamp: %" PRId64 " and previous paused duration %" PRId64,
trackName, timestampUs, previousPausedDurationUs);
if (timestampUs > mTrackDurationUs) {
mTrackDurationUs = timestampUs;
}
// 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);
if (currDurationTicks < 0LL) {
ALOGE("do not support out of order frames (timestamp: %lld < last: %lld for %s track",
(long long)timestampUs, (long long)lastTimestampUs, trackName);
copy->release();
mSource->stop();
mIsMalformed = true;
break;
}
// if the duration is different for this sample, see if it is close enough to the previous
// duration that we can fudge it and use the same value, to avoid filling the stts table
// with lots of near-identical entries.
// "close enough" here means that the current duration needs to be adjusted by less
// than 0.1 milliseconds
if (lastDurationTicks && (currDurationTicks != lastDurationTicks)) {
int64_t deltaUs = ((lastDurationTicks - currDurationTicks) * 1000000LL
+ (mTimeScale / 2)) / mTimeScale;
if (deltaUs > -100 && deltaUs < 100) {
// use previous ticks, and adjust timestamp as if it was actually that number
// of ticks
currDurationTicks = lastDurationTicks;
timestampUs += deltaUs;
}
}
mStszTableEntries->add(htonl(sampleSize));
if (mStszTableEntries->count() > 2) {
// 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 (mStszTableEntries->count() == 3 || currDurationTicks != lastDurationTicks) {
addOneSttsTableEntry(sampleCount, lastDurationTicks);
sampleCount = 1;
} else {
++sampleCount;
}
}
if (mSamplesHaveSameSize) {
if (mStszTableEntries->count() >= 2 && previousSampleSize != sampleSize) {
mSamplesHaveSameSize = false;
}
previousSampleSize = sampleSize;
}
ALOGV("%s timestampUs/lastTimestampUs: %" PRId64 "/%" PRId64,
trackName, timestampUs, lastTimestampUs);
lastDurationUs = timestampUs - lastTimestampUs;
lastDurationTicks = currDurationTicks;
lastTimestampUs = timestampUs;
if (isSync != 0) {
addOneStssTableEntry(mStszTableEntries->count());
}
if (mTrackingProgressStatus) {
if (mPreviousTrackTimeUs <= 0) {
mPreviousTrackTimeUs = mStartTimestampUs;
}
trackProgressStatus(timestampUs);
}
}
if (!hasMultipleTracks) {
size_t bytesWritten;
off64_t offset = mOwner->addSample_l(
copy, usePrefix, tiffHdrOffset, &bytesWritten);
if (mIsHeic) {
addItemOffsetAndSize(offset, bytesWritten, isExif);
} else {
uint32_t count = (mOwner->use32BitFileOffset()
? mStcoTableEntries->count()
: mCo64TableEntries->count());
if (count == 0) {
addChunkOffset(offset);
}
}
copy->release();
copy = NULL;
continue;
}
mChunkSamples.push_back(copy);
if (mIsHeic) {
bufferChunk(0 /*timestampUs*/);
++nChunks;
} else 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
lastSamplesPerChunk != mChunkSamples.size()) {
lastSamplesPerChunk = mChunkSamples.size();
addOneStscTableEntry(nChunks, lastSamplesPerChunk);
}
bufferChunk(timestampUs);
chunkTimestampUs = timestampUs;
}
}
}
}
if (isTrackMalFormed()) {
dumpTimeStamps();
err = ERROR_MALFORMED;
}
mOwner->trackProgressStatus(mTrackId, -1, err);
if (mIsHeic) {
if (!mChunkSamples.empty()) {
bufferChunk(0);
++nChunks;
}
} else {
// Last chunk
if (!hasMultipleTracks) {
addOneStscTableEntry(1, mStszTableEntries->count());
} 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 (mStszTableEntries->count() == 1) {
lastDurationUs = 0; // A single sample's duration
lastDurationTicks = 0;
} else {
++sampleCount; // Count for the last sample
}
if (mStszTableEntries->count() <= 2) {
addOneSttsTableEntry(1, lastDurationTicks);
if (sampleCount - 1 > 0) {
addOneSttsTableEntry(sampleCount - 1, lastDurationTicks);
}
} else {
addOneSttsTableEntry(sampleCount, lastDurationTicks);
}
// The last ctts box may not have been written yet, and this
// is to make sure that we write out the last ctts box.
if (currCttsOffsetTimeTicks == lastCttsOffsetTimeTicks) {
if (cttsSampleCount > 0) {
addOneCttsTableEntry(cttsSampleCount, lastCttsOffsetTimeTicks);
}
}
mTrackDurationUs += lastDurationUs;
}
mReachedEOS = true;
sendTrackSummary(hasMultipleTracks);
ALOGI("Received total/0-length (%d/%d) buffers and encoded %d frames. - %s",
count, nZeroLengthFrames, mStszTableEntries->count(), trackName);
if (mIsAudio) {
ALOGI("Audio track drift time: %" PRId64 " us", mOwner->getDriftTimeUs());
}
if (err == ERROR_END_OF_STREAM) {
return OK;
}
return err;
}
bool MPEG4Writer::Track::isTrackMalFormed() const {
if (mIsMalformed) {
return true;
}
if (!mIsHeic && mStszTableEntries->count() == 0) { // no samples written
ALOGE("The number of recorded samples is 0");
return true;
}
if (mIsVideo && mStssTableEntries->count() == 0) { // no sync frames for video
ALOGE("There are no sync frames for video track");
return true;
}
if (OK != checkCodecSpecificData()) { // no codec specific data
return true;
}
return false;
}
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,
mStszTableEntries->count());
{
// 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) {
ALOGV("trackProgressStatus: %" PRId64 " us", timeUs);
if (mTrackEveryTimeDurationUs > 0 &&
timeUs - mPreviousTrackTimeUs >= mTrackEveryTimeDurationUs) {
ALOGV("Fire time tracking progress status at %" PRId64 " 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) {
ALOGV("setDriftTimeUs: %" PRId64 " us", driftTimeUs);
Mutex::Autolock autolock(mLock);
mDriftTimeUs = driftTimeUs;
}
int64_t MPEG4Writer::getDriftTimeUs() {
ALOGV("getDriftTimeUs: %" PRId64 " us", mDriftTimeUs);
Mutex::Autolock autolock(mLock);
return mDriftTimeUs;
}
bool MPEG4Writer::isRealTimeRecording() const {
return mIsRealTimeRecording;
}
bool MPEG4Writer::useNalLengthFour() {
return mUse4ByteNalLength;
}
void MPEG4Writer::Track::bufferChunk(int64_t timestampUs) {
ALOGV("bufferChunk");
Chunk chunk(this, timestampUs, mChunkSamples);
mOwner->bufferChunk(chunk);
mChunkSamples.clear();
}
int64_t MPEG4Writer::Track::getDurationUs() const {
return mTrackDurationUs + getStartTimeOffsetTimeUs() + mOwner->getStartTimeOffsetBFramesUs();
}
int64_t MPEG4Writer::Track::getEstimatedTrackSizeBytes() const {
return mEstimatedTrackSizeBytes;
}
int32_t MPEG4Writer::Track::getMetaSizeIncrease(
int32_t angle, int32_t trackCount) const {
CHECK(mIsHeic);
int32_t grid = (mTileWidth > 0);
int32_t rotate = (angle > 0);
// Note that the rotation angle is in the file meta, and we don't have
// it until start, so here the calculation has to assume rotation.
// increase to ipco
int32_t increase = 20 * (grid + 1) // 'ispe' property
+ (8 + mCodecSpecificDataSize) // 'hvcC' property
;
if (rotate) {
increase += 9; // 'irot' property (worst case)
}
// increase to iref and idat
if (grid) {
increase += (12 + mNumTiles * 2) // 'dimg' in iref
+ 12; // ImageGrid in 'idat' (worst case)
}
increase += (12 + 2); // 'cdsc' in iref
// increase to iloc, iinf
increase += (16 // increase to 'iloc'
+ 21) // increase to 'iinf'
* (mNumTiles + grid + 1); // "+1" is for 'Exif'
// When total # of properties is > 127, the properties id becomes 2-byte.
// We write 4 properties at most for each image (2x'ispe', 1x'hvcC', 1x'irot').
// Set the threshold to be 30.
int32_t propBytes = trackCount > 30 ? 2 : 1;
// increase to ipma
increase += (3 + 2 * propBytes) * mNumTiles // 'ispe' + 'hvcC'
+ grid * (3 + propBytes) // 'ispe' for grid
+ rotate * propBytes; // 'irot' (either on grid or tile)
return increase;
}
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) ||
!strcasecmp(MEDIA_MIMETYPE_VIDEO_HEVC, mime) ||
!strcasecmp(MEDIA_MIMETYPE_IMAGE_ANDROID_HEIC, mime)) {
if (!mCodecSpecificData ||
mCodecSpecificDataSize <= 0) {
ALOGE("Missing codec specific data");
return ERROR_MALFORMED;
}
} else {
if (mCodecSpecificData ||
mCodecSpecificDataSize > 0) {
ALOGE("Unexepected codec specific data found");
return ERROR_MALFORMED;
}
}
return OK;
}
const char *MPEG4Writer::Track::getTrackType() const {
return mIsAudio ? "Audio" :
mIsVideo ? "Video" :
mIsHeic ? "Image" :
"Metadata";
}
void MPEG4Writer::Track::writeTrackHeader(bool use32BitOffset) {
uint32_t now = getMpeg4Time();
mOwner->beginBox("trak");
writeTkhdBox(now);
writeEdtsBox();
mOwner->beginBox("mdia");
writeMdhdBox(now);
writeHdlrBox();
mOwner->beginBox("minf");
if (mIsAudio) {
writeSmhdBox();
} else if (mIsVideo) {
writeVmhdBox();
} else {
writeNmhdBox();
}
writeDinfBox();
writeStblBox(use32BitOffset);
mOwner->endBox(); // minf
mOwner->endBox(); // mdia
mOwner->endBox(); // trak
}
int64_t MPEG4Writer::Track::getMinCttsOffsetTimeUs() {
// For video tracks with ctts table, this should return the minimum ctts
// offset in the table. For non-video tracks or video tracks without ctts
// table, this will return kMaxCttsOffsetTimeUs.
if (mMinCttsOffsetTicks == mMaxCttsOffsetTicks) {
return kMaxCttsOffsetTimeUs;
}
return mMinCttsOffsetTimeUs;
}
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 if (mIsVideo) {
writeVideoFourCCBox();
} else {
writeMetadataFourCCBox();
}
mOwner->endBox(); // stsd
writeSttsBox();
if (mIsVideo) {
writeCttsBox();
writeStssBox();
}
writeStszBox();
writeStscBox();
writeStcoBox(use32BitOffset);
mOwner->endBox(); // stbl
}
void MPEG4Writer::Track::writeMetadataFourCCBox() {
const char *mime;
bool success = mMeta->findCString(kKeyMIMEType, &mime);
CHECK(success);
const char *fourcc = getFourCCForMime(mime);
if (fourcc == NULL) {
ALOGE("Unknown mime type '%s'.", mime);
TRESPASS();
}
mOwner->beginBox(fourcc); // TextMetaDataSampleEntry
// HACK to make the metadata track compliant with the ISO standard.
//
// Metadata track is added from API 26 and the original implementation does not
// fully followed the TextMetaDataSampleEntry specified in ISO/IEC 14496-12-2015
// in that only the mime_format is written out. content_encoding and
// data_reference_index have not been written out. This leads to the failure
// when some MP4 parser tries to parse the metadata track according to the
// standard. The hack here will make the metadata track compliant with the
// standard while still maintaining backwards compatibility. This would enable
// Android versions before API 29 to be able to read out the standard compliant
// Metadata track generated with Android API 29 and upward. The trick is based
// on the fact that the Metadata track must start with prefix “application/” and
// those missing fields are not used in Android's Metadata track. By writting
// out the mime_format twice, the first mime_format will be used to fill out the
// missing reserved, data_reference_index and content encoding fields. On the
// parser side, the extracter before API 29 will read out the first mime_format
// correctly and drop the second mime_format. The extractor from API 29 will
// check if the reserved, data_reference_index and content encoding are filled
// with “application” to detect if this is a standard compliant metadata track
// and read out the data accordingly.
mOwner->writeCString(mime);
mOwner->writeCString(mime); // metadata mime_format
mOwner->endBox(); // mett
}
void MPEG4Writer::Track::writeVideoFourCCBox() {
const char *mime;
bool success = mMeta->findCString(kKeyMIMEType, &mime);
CHECK(success);
const char *fourcc = getFourCCForMime(mime);
if (fourcc == NULL) {
ALOGE("Unknown mime type '%s'.", mime);
TRESPASS();
}
mOwner->beginBox(fourcc); // video format
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->writeInt8(0); // compressor string length
mOwner->write(" ", 31);
mOwner->writeInt16(0x18); // depth
mOwner->writeInt16(-1); // predefined
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();
} else if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_HEVC, mime)) {
writeHvccBox();
}
writePaspBox();
writeColrBox();
mOwner->endBox(); // mp4v, s263 or avc1
}
void MPEG4Writer::Track::writeColrBox() {
ColorAspects aspects;
memset(&aspects, 0, sizeof(aspects));
// TRICKY: using | instead of || because we want to execute all findInt32-s
if (mMeta->findInt32(kKeyColorPrimaries, (int32_t*)&aspects.mPrimaries)
| mMeta->findInt32(kKeyTransferFunction, (int32_t*)&aspects.mTransfer)
| mMeta->findInt32(kKeyColorMatrix, (int32_t*)&aspects.mMatrixCoeffs)
| mMeta->findInt32(kKeyColorRange, (int32_t*)&aspects.mRange)) {
int32_t primaries, transfer, coeffs;
bool fullRange;
ColorUtils::convertCodecColorAspectsToIsoAspects(
aspects, &primaries, &transfer, &coeffs, &fullRange);
mOwner->beginBox("colr");
mOwner->writeFourcc("nclx");
mOwner->writeInt16(primaries);
mOwner->writeInt16(transfer);
mOwner->writeInt16(coeffs);
mOwner->writeInt8(int8_t(fullRange ? 0x80 : 0x0));
mOwner->endBox(); // colr
}
}
void MPEG4Writer::Track::writeAudioFourCCBox() {
const char *mime;
bool success = mMeta->findCString(kKeyMIMEType, &mime);
CHECK(success);
const char *fourcc = getFourCCForMime(mime);
if (fourcc == NULL) {
ALOGE("Unknown mime type '%s'.", mime);
TRESPASS();
}
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();
}
static void generateEsdsSize(size_t dataLength, size_t* sizeGenerated, uint8_t* buffer) {
size_t offset = 0, cur = 0;
size_t more = 0x00;
*sizeGenerated = 0;
/* Start with the LSB(7 bits) of dataLength and build the byte sequence upto MSB.
* Continuation flag(most significant bit) will be set on the first N-1 bytes.
*/
do {
buffer[cur++] = (dataLength & 0x7f) | more;
dataLength >>= 7;
more = 0x80;
++(*sizeGenerated);
} while (dataLength > 0u);
--cur;
// Reverse the newly formed byte sequence.
while (cur > offset) {
uint8_t tmp = buffer[cur];
buffer[cur--] = buffer[offset];
buffer[offset++] = tmp;
}
}
void MPEG4Writer::Track::writeMp4aEsdsBox() {
CHECK(mCodecSpecificData);
CHECK_GT(mCodecSpecificDataSize, 0u);
uint8_t sizeESDBuffer[kESDSScratchBufferSize];
uint8_t sizeDCDBuffer[kESDSScratchBufferSize];
uint8_t sizeDSIBuffer[kESDSScratchBufferSize];
size_t sizeESD = 0;
size_t sizeDCD = 0;
size_t sizeDSI = 0;
generateEsdsSize(mCodecSpecificDataSize, &sizeDSI, sizeDSIBuffer);
generateEsdsSize(mCodecSpecificDataSize + sizeDSI + 14, &sizeDCD, sizeDCDBuffer);
generateEsdsSize(mCodecSpecificDataSize + sizeDSI + sizeDCD + 21, &sizeESD, sizeESDBuffer);
mOwner->beginBox("esds");
mOwner->writeInt32(0); // version=0, flags=0
mOwner->writeInt8(0x03); // ES_DescrTag
mOwner->write(sizeESDBuffer, sizeESD);
mOwner->writeInt16(0x0000);// ES_ID
mOwner->writeInt8(0x00);
mOwner->writeInt8(0x04); // DecoderConfigDescrTag
mOwner->write(sizeDCDBuffer, sizeDCD);
mOwner->writeInt8(0x40); // objectTypeIndication ISO/IEC 14492-2
mOwner->writeInt8(0x15); // streamType AudioStream
mOwner->writeInt16(0x03); // XXX
mOwner->writeInt8(0x00); // buffer size 24-bit (0x300)
int32_t avgBitrate = 0;
(void)mMeta->findInt32(kKeyBitRate, &avgBitrate);
int32_t maxBitrate = 0;
(void)mMeta->findInt32(kKeyMaxBitRate, &maxBitrate);
mOwner->writeInt32(maxBitrate);
mOwner->writeInt32(avgBitrate);
mOwner->writeInt8(0x05); // DecoderSpecificInfoTag
mOwner->write(sizeDSIBuffer, sizeDSI);
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_GT(mCodecSpecificDataSize, 0u);
uint8_t sizeESDBuffer[kESDSScratchBufferSize];
uint8_t sizeDCDBuffer[kESDSScratchBufferSize];
uint8_t sizeDSIBuffer[kESDSScratchBufferSize];
size_t sizeESD = 0;
size_t sizeDCD = 0;
size_t sizeDSI = 0;
generateEsdsSize(mCodecSpecificDataSize, &sizeDSI, sizeDSIBuffer);
generateEsdsSize(mCodecSpecificDataSize + sizeDSI + 14, &sizeDCD, sizeDCDBuffer);
generateEsdsSize(mCodecSpecificDataSize + sizeDSI + sizeDCD + 21, &sizeESD, sizeESDBuffer);
mOwner->beginBox("esds");
mOwner->writeInt32(0); // version=0, flags=0
mOwner->writeInt8(0x03); // ES_DescrTag
mOwner->write(sizeESDBuffer, sizeESD);
mOwner->writeInt16(0x0000); // ES_ID
mOwner->writeInt8(0x1f);
mOwner->writeInt8(0x04); // DecoderConfigDescrTag
mOwner->write(sizeDCDBuffer, sizeDCD);
mOwner->writeInt8(0x20); // objectTypeIndication ISO/IEC 14492-2
mOwner->writeInt8(0x11); // streamType VisualStream
static const uint8_t kData[] = {
0x01, 0x77, 0x00, // buffer size 96000 bytes
};
mOwner->write(kData, sizeof(kData));
int32_t avgBitrate = 0;
(void)mMeta->findInt32(kKeyBitRate, &avgBitrate);
int32_t maxBitrate = 0;
(void)mMeta->findInt32(kKeyMaxBitRate, &maxBitrate);
mOwner->writeInt32(maxBitrate);
mOwner->writeInt32(avgBitrate);
mOwner->writeInt8(0x05); // DecoderSpecificInfoTag
mOwner->write(sizeDSIBuffer, sizeDSI);
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(uint32_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); // 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 (!mIsVideo) {
mOwner->writeInt32(0);
mOwner->writeInt32(0);
} else {
int32_t width, height;
bool success = mMeta->findInt32(kKeyDisplayWidth, &width);
success = success && mMeta->findInt32(kKeyDisplayHeight, &height);
// Use width/height if display width/height are not present.
if (!success) {
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::writeNmhdBox() {
mOwner->beginBox("nmhd");
mOwner->writeInt32(0); // version=0, flags=0
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" : (mIsVideo ? "vide" : "meta")); // 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": (mIsVideo ? "VideoHandle" : "MetadHandle"));
mOwner->endBox();
}
void MPEG4Writer::Track::writeEdtsBox(){
ALOGV("%s : getStartTimeOffsetTimeUs of track:%" PRId64 " us", getTrackType(),
getStartTimeOffsetTimeUs());
// Prepone video playback.
if (mMinCttsOffsetTicks != mMaxCttsOffsetTicks) {
int32_t mvhdTimeScale = mOwner->getTimeScale();
uint32_t tkhdDuration = (getDurationUs() * mvhdTimeScale + 5E5) / 1E6;
int64_t mediaTime = ((kMaxCttsOffsetTimeUs - getMinCttsOffsetTimeUs())
* mTimeScale + 5E5) / 1E6;
if (tkhdDuration > 0 && mediaTime > 0) {
addOneElstTableEntry(tkhdDuration, mediaTime, 1, 0);
}
}
if (mElstTableEntries->count() == 0) {
return;
}
mOwner->beginBox("edts");
mOwner->beginBox("elst");
mOwner->writeInt32(0); // version=0, flags=0
mElstTableEntries->write(mOwner);
mOwner->endBox(); // elst;
mOwner->endBox(); // edts
}
void MPEG4Writer::Track::writeMdhdBox(uint32_t now) {
int64_t trakDurationUs = getDurationUs();
int64_t mdhdDuration = (trakDurationUs * mTimeScale + 5E5) / 1E6;
mOwner->beginBox("mdhd");
if (mdhdDuration > UINT32_MAX) {
mOwner->writeInt32((1 << 24)); // version=1, flags=0
mOwner->writeInt64((int64_t)now); // creation time
mOwner->writeInt64((int64_t)now); // modification time
mOwner->writeInt32(mTimeScale); // media timescale
mOwner->writeInt64(mdhdDuration); // media timescale
} else {
mOwner->writeInt32(0); // version=0, flags=0
mOwner->writeInt32(now); // creation time
mOwner->writeInt32(now); // modification time
mOwner->writeInt32(mTimeScale); // media timescale
mOwner->writeInt32((int32_t)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?
const char *lang = NULL;
int16_t langCode = 0;
if (mMeta->findCString(kKeyMediaLanguage, &lang) && lang && strnlen(lang, 3) > 2) {
langCode = ((lang[0] & 0x1f) << 10) | ((lang[1] & 0x1f) << 5) | (lang[2] & 0x1f);
}
mOwner->writeInt16(langCode); // 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_GE(mCodecSpecificDataSize, 5u);
// 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::writeHvccBox() {
CHECK(mCodecSpecificData);
CHECK_GE(mCodecSpecificDataSize, 5u);
// 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[21] = (ptr[21] & 0xfc) | (mOwner->useNalLengthFour() ? 3 : 1);
mOwner->beginBox("hvcC");
mOwner->write(mCodecSpecificData, mCodecSpecificDataSize);
mOwner->endBox(); // hvcC
}
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
}
int64_t MPEG4Writer::Track::getStartTimeOffsetTimeUs() const {
int64_t trackStartTimeOffsetUs = 0;
int64_t moovStartTimeUs = mOwner->getStartTimestampUs();
if (mStartTimestampUs != -1 && mStartTimestampUs != moovStartTimeUs) {
CHECK_GT(mStartTimestampUs, moovStartTimeUs);
trackStartTimeOffsetUs = mStartTimestampUs - moovStartTimeUs;
}
return trackStartTimeOffsetUs;
}
int32_t MPEG4Writer::Track::getStartTimeOffsetScaledTime() const {
return (getStartTimeOffsetTimeUs() * mTimeScale + 500000LL) / 1000000LL;
}
void MPEG4Writer::Track::writeSttsBox() {
mOwner->beginBox("stts");
mOwner->writeInt32(0); // version=0, flags=0
if (mMinCttsOffsetTicks == mMaxCttsOffsetTicks) {
// For non-vdeio tracks or video tracks without ctts table,
// adjust duration of first sample for tracks to account for
// first sample not starting at the media start time.
// TODO: consider signaling this using some offset
// as this is not quite correct.
uint32_t duration;
CHECK(mSttsTableEntries->get(duration, 1));
duration = htonl(duration); // Back to host byte order
int32_t startTimeOffsetScaled = (((getStartTimeOffsetTimeUs() +
mOwner->getStartTimeOffsetBFramesUs()) * mTimeScale) + 500000LL) / 1000000LL;
mSttsTableEntries->set(htonl((int32_t)duration + startTimeOffsetScaled), 1);
}
mSttsTableEntries->write(mOwner);
mOwner->endBox(); // stts
}
void MPEG4Writer::Track::writeCttsBox() {
// There is no B frame at all
if (mMinCttsOffsetTicks == mMaxCttsOffsetTicks) {
return;
}
// Do not write ctts box when there is no need to have it.
if (mCttsTableEntries->count() == 0) {
return;
}
ALOGV("ctts box has %d entries with range [%" PRId64 ", %" PRId64 "]",
mCttsTableEntries->count(), mMinCttsOffsetTicks, mMaxCttsOffsetTicks);
mOwner->beginBox("ctts");
mOwner->writeInt32(0); // version=0, flags=0
int64_t deltaTimeUs = kMaxCttsOffsetTimeUs - getStartTimeOffsetTimeUs();
int64_t delta = (deltaTimeUs * mTimeScale + 500000LL) / 1000000LL;
mCttsTableEntries->adjustEntries([delta](size_t /* ix */, uint32_t (&value)[2]) {
// entries are <count, ctts> pairs; adjust only ctts
uint32_t duration = htonl(value[1]); // back to host byte order
// Prevent overflow and underflow
if (delta > duration) {
duration = 0;
} else if (delta < 0 && UINT32_MAX + delta < duration) {
duration = UINT32_MAX;
} else {
duration -= delta;
}
value[1] = htonl(duration);
});
mCttsTableEntries->write(mOwner);
mOwner->endBox(); // ctts
}
void MPEG4Writer::Track::writeStssBox() {
mOwner->beginBox("stss");
mOwner->writeInt32(0); // version=0, flags=0
mStssTableEntries->write(mOwner);
mOwner->endBox(); // stss
}
void MPEG4Writer::Track::writeStszBox() {
mOwner->beginBox("stsz");
mOwner->writeInt32(0); // version=0, flags=0
mOwner->writeInt32(0);
mStszTableEntries->write(mOwner);
mOwner->endBox(); // stsz
}
void MPEG4Writer::Track::writeStscBox() {
mOwner->beginBox("stsc");
mOwner->writeInt32(0); // version=0, flags=0
mStscTableEntries->write(mOwner);
mOwner->endBox(); // stsc
}
void MPEG4Writer::Track::writeStcoBox(bool use32BitOffset) {
mOwner->beginBox(use32BitOffset? "stco": "co64");
mOwner->writeInt32(0); // version=0, flags=0
if (use32BitOffset) {
mStcoTableEntries->write(mOwner);
} else {
mCo64TableEntries->write(mOwner);
}
mOwner->endBox(); // stco or co64
}
void MPEG4Writer::writeUdtaBox() {
beginBox("udta");
writeGeoDataBox();
endBox();
}
void MPEG4Writer::writeHdlr(const char *handlerType) {
beginBox("hdlr");
writeInt32(0); // Version, Flags
writeInt32(0); // Predefined
writeFourcc(handlerType);
writeInt32(0); // Reserved[0]
writeInt32(0); // Reserved[1]
writeInt32(0); // Reserved[2]
writeInt8(0); // Name (empty)
endBox();
}
void MPEG4Writer::writeKeys() {
size_t count = mMetaKeys->countEntries();
beginBox("keys");
writeInt32(0); // Version, Flags
writeInt32(count); // Entry_count
for (size_t i = 0; i < count; i++) {
AMessage::Type type;
const char *key = mMetaKeys->getEntryNameAt(i, &type);
size_t n = strlen(key);
writeInt32(n + 8);
writeFourcc("mdta");
write(key, n); // write without the \0
}
endBox();
}
void MPEG4Writer::writeIlst() {
size_t count = mMetaKeys->countEntries();
beginBox("ilst");
for (size_t i = 0; i < count; i++) {
beginBox(i + 1); // key id (1-based)
beginBox("data");
AMessage::Type type;
const char *key = mMetaKeys->getEntryNameAt(i, &type);
switch (type) {
case AMessage::kTypeString:
{
AString val;
CHECK(mMetaKeys->findString(key, &val));
writeInt32(1); // type = UTF8
writeInt32(0); // default country/language
write(val.c_str(), strlen(val.c_str())); // write without \0
break;
}
case AMessage::kTypeFloat:
{
float val;
CHECK(mMetaKeys->findFloat(key, &val));
writeInt32(23); // type = float32
writeInt32(0); // default country/language
writeInt32(*reinterpret_cast<int32_t *>(&val));
break;
}
case AMessage::kTypeInt32:
{
int32_t val;
CHECK(mMetaKeys->findInt32(key, &val));
writeInt32(67); // type = signed int32
writeInt32(0); // default country/language
writeInt32(val);
break;
}
default:
{
ALOGW("Unsupported key type, writing 0 instead");
writeInt32(77); // type = unsigned int32
writeInt32(0); // default country/language
writeInt32(0);
break;
}
}
endBox(); // data
endBox(); // key id
}
endBox(); // ilst
}
void MPEG4Writer::writeMoovLevelMetaBox() {
size_t count = mMetaKeys->countEntries();
if (count == 0) {
return;
}
beginBox("meta");
writeHdlr("mdta");
writeKeys();
writeIlst();
endBox();
}
void MPEG4Writer::writeIlocBox() {
beginBox("iloc");
// Use version 1 to allow construction method 1 that refers to
// data in idat box inside meta box.
writeInt32(0x01000000); // Version = 1, Flags = 0
writeInt16(0x4400); // offset_size = length_size = 4
// base_offset_size = index_size = 0
// 16-bit item_count
size_t itemCount = mItems.size();
if (itemCount > 65535) {
ALOGW("Dropping excess items: itemCount %zu", itemCount);
itemCount = 65535;
}
writeInt16((uint16_t)itemCount);
for (size_t i = 0; i < itemCount; i++) {
writeInt16(mItems[i].itemId);
bool isGrid = mItems[i].isGrid();
writeInt16(isGrid ? 1 : 0); // construction_method
writeInt16(0); // data_reference_index = 0
writeInt16(1); // extent_count = 1
if (isGrid) {
// offset into the 'idat' box
writeInt32(mNumGrids++ * 8);
writeInt32(8);
} else {
writeInt32(mItems[i].offset);
writeInt32(mItems[i].size);
}
}
endBox();
}
void MPEG4Writer::writeInfeBox(
uint16_t itemId, const char *itemType, uint32_t flags) {
beginBox("infe");
writeInt32(0x02000000 | flags); // Version = 2, Flags = 0
writeInt16(itemId);
writeInt16(0); //item_protection_index = 0
writeFourcc(itemType);
writeCString(""); // item_name
endBox();
}
void MPEG4Writer::writeIinfBox() {
beginBox("iinf");
writeInt32(0); // Version = 0, Flags = 0
// 16-bit item_count
size_t itemCount = mItems.size();
if (itemCount > 65535) {
ALOGW("Dropping excess items: itemCount %zu", itemCount);
itemCount = 65535;
}
writeInt16((uint16_t)itemCount);
for (size_t i = 0; i < itemCount; i++) {
writeInfeBox(mItems[i].itemId, mItems[i].itemType,
(mItems[i].isImage() && mItems[i].isHidden) ? 1 : 0);
}
endBox();
}
void MPEG4Writer::writeIdatBox() {
beginBox("idat");
for (size_t i = 0; i < mItems.size(); i++) {
if (mItems[i].isGrid()) {
writeInt8(0); // version
// flags == 1 means 32-bit width,height
int8_t flags = (mItems[i].width > 65535 || mItems[i].height > 65535);
writeInt8(flags);
writeInt8(mItems[i].rows - 1);
writeInt8(mItems[i].cols - 1);
if (flags) {
writeInt32(mItems[i].width);
writeInt32(mItems[i].height);
} else {
writeInt16((uint16_t)mItems[i].width);
writeInt16((uint16_t)mItems[i].height);
}
}
}
endBox();
}
void MPEG4Writer::writeIrefBox() {
beginBox("iref");
writeInt32(0); // Version = 0, Flags = 0
{
for (size_t i = 0; i < mItems.size(); i++) {
for (size_t r = 0; r < mItems[i].refsList.size(); r++) {
const ItemRefs &refs = mItems[i].refsList[r];
beginBox(refs.key);
writeInt16(mItems[i].itemId);
size_t refCount = refs.value.size();
if (refCount > 65535) {
ALOGW("too many entries in %s", refs.key);
refCount = 65535;
}
writeInt16((uint16_t)refCount);
for (size_t refIndex = 0; refIndex < refCount; refIndex++) {
writeInt16(refs.value[refIndex]);
}
endBox();
}
}
}
endBox();
}
void MPEG4Writer::writePitmBox() {
beginBox("pitm");
writeInt32(0); // Version = 0, Flags = 0
writeInt16(mPrimaryItemId);
endBox();
}
void MPEG4Writer::writeIpcoBox() {
beginBox("ipco");
size_t numProperties = mProperties.size();
if (numProperties > 32767) {
ALOGW("Dropping excess properties: numProperties %zu", numProperties);
numProperties = 32767;
}
for (size_t propIndex = 0; propIndex < numProperties; propIndex++) {
switch (mProperties[propIndex].type) {
case FOURCC('h', 'v', 'c', 'C'):
{
beginBox("hvcC");
sp<ABuffer> hvcc = mProperties[propIndex].hvcc;
// 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 *)hvcc->data();
ptr[21] = (ptr[21] & 0xfc) | (useNalLengthFour() ? 3 : 1);
write(hvcc->data(), hvcc->size());
endBox();
break;
}
case FOURCC('i', 's', 'p', 'e'):
{
beginBox("ispe");
writeInt32(0); // Version = 0, Flags = 0
writeInt32(mProperties[propIndex].width);
writeInt32(mProperties[propIndex].height);
endBox();
break;
}
case FOURCC('i', 'r', 'o', 't'):
{
beginBox("irot");
writeInt8(mProperties[propIndex].rotation);
endBox();
break;
}
default:
ALOGW("Skipping unrecognized property: type 0x%08x",
mProperties[propIndex].type);
}
}
endBox();
}
void MPEG4Writer::writeIpmaBox() {
beginBox("ipma");
uint32_t flags = (mProperties.size() > 127) ? 1 : 0;
writeInt32(flags); // Version = 0
writeInt32(mAssociationEntryCount);
for (size_t itemIndex = 0; itemIndex < mItems.size(); itemIndex++) {
const Vector<uint16_t> &properties = mItems[itemIndex].properties;
if (properties.empty()) {
continue;
}
writeInt16(mItems[itemIndex].itemId);
size_t entryCount = properties.size();
if (entryCount > 255) {
ALOGW("Dropping excess associations: entryCount %zu", entryCount);
entryCount = 255;
}
writeInt8((uint8_t)entryCount);
for (size_t propIndex = 0; propIndex < entryCount; propIndex++) {
if (flags & 1) {
writeInt16((1 << 15) | properties[propIndex]);
} else {
writeInt8((1 << 7) | properties[propIndex]);
}
}
}
endBox();
}
void MPEG4Writer::writeIprpBox() {
beginBox("iprp");
writeIpcoBox();
writeIpmaBox();
endBox();
}
void MPEG4Writer::writeFileLevelMetaBox() {
// patch up the mPrimaryItemId and count items with prop associations
uint16_t firstVisibleItemId = 0;
uint16_t firstImageItemId = 0;
for (size_t index = 0; index < mItems.size(); index++) {
if (!mItems[index].isImage()) continue;
if (mItems[index].isPrimary) {
mPrimaryItemId = mItems[index].itemId;
}
if (!firstImageItemId) {
firstImageItemId = mItems[index].itemId;
}
if (!firstVisibleItemId && !mItems[index].isHidden) {
firstVisibleItemId = mItems[index].itemId;
}
if (!mItems[index].properties.empty()) {
mAssociationEntryCount++;
}
}
if (!firstImageItemId) {
ALOGE("no valid image was found");
return;
}
if (mPrimaryItemId == 0) {
if (firstVisibleItemId > 0) {
ALOGW("didn't find primary, using first visible image");
mPrimaryItemId = firstVisibleItemId;
} else {
ALOGW("no primary and no visible item, using first image");
mPrimaryItemId = firstImageItemId;
}
}
for (List<Track *>::iterator it = mTracks.begin();
it != mTracks.end(); ++it) {
if ((*it)->isHeic()) {
(*it)->flushItemRefs();
}
}
beginBox("meta");
writeInt32(0); // Version = 0, Flags = 0
writeHdlr("pict");
writeIlocBox();
writeIinfBox();
writePitmBox();
writeIprpBox();
if (mNumGrids > 0) {
writeIdatBox();
}
if (mHasRefs) {
writeIrefBox();
}
endBox();
}
uint16_t MPEG4Writer::addProperty_l(const ItemProperty &prop) {
char typeStr[5];
MakeFourCCString(prop.type, typeStr);
ALOGV("addProperty_l: %s", typeStr);
mProperties.push_back(prop);
// returning 1-based property index
return mProperties.size();
}
uint16_t MPEG4Writer::addItem_l(const ItemInfo &info) {
ALOGV("addItem_l: type %s, offset %u, size %u",
info.itemType, info.offset, info.size);
size_t index = mItems.size();
mItems.push_back(info);
// make the item id start at kItemIdBase
mItems.editItemAt(index).itemId = index + kItemIdBase;
#if (LOG_NDEBUG==0)
if (!info.properties.empty()) {
AString str;
for (size_t i = 0; i < info.properties.size(); i++) {
if (i > 0) {
str.append(", ");
}
str.append(info.properties[i]);
}
ALOGV("addItem_l: id %d, properties: %s", mItems[index].itemId, str.c_str());
}
#endif // (LOG_NDEBUG==0)
return mItems[index].itemId;
}
void MPEG4Writer::addRefs_l(uint16_t itemId, const ItemRefs &refs) {
if (refs.value.empty()) {
return;
}
if (itemId < kItemIdBase) {
ALOGW("itemId shouldn't be smaller than kItemIdBase");
return;
}
size_t index = itemId - kItemIdBase;
mItems.editItemAt(index).refsList.push_back(refs);
mHasRefs = true;
}
/*
* 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