Google Git
Sign in
android / platform / frameworks / base / c80218a9665344a465383fd067f89778d4b6a3f1 / . / media / libstagefright / MPEG4Writer.cpp
blob: 9f712c381310d4cfae4a7a3e1bf4c6e53fdda0da [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 <utils/Log.h>
#include <arpa/inet.h>
#include <ctype.h>
#include <pthread.h>
#include <media/stagefright/MPEG4Writer.h>
#include <media/stagefright/MediaBuffer.h>
#include <media/stagefright/MetaData.h>
#include <media/stagefright/MediaDebug.h>
#include <media/stagefright/MediaDefs.h>
#include <media/stagefright/MediaErrors.h>
#include <media/stagefright/MediaSource.h>
#include <media/stagefright/Utils.h>
#include <media/mediarecorder.h>
#include <cutils/properties.h>
#include "include/ESDS.h"
namespace android {
class MPEG4Writer::Track {
public:
Track(MPEG4Writer *owner, const sp<MediaSource> &source);
~Track();
status_t start(MetaData *params);
void stop();
void pause();
bool reachedEOS();
int64_t getDurationUs() const;
int64_t getEstimatedTrackSizeBytes() const;
void writeTrackHeader(int32_t trackID, bool use32BitOffset = true);
private:
MPEG4Writer *mOwner;
sp<MetaData> mMeta;
sp<MediaSource> mSource;
volatile bool mDone;
volatile bool mPaused;
volatile bool mResumed;
int64_t mMaxTimeStampUs;
int64_t mEstimatedTrackSizeBytes;
int32_t mTimeScale;
pthread_t mThread;
// mNumSamples is used to track how many samples in mSampleSizes List.
// This is to reduce the cost associated with mSampleSizes.size() call,
// since it is O(n). Ideally, the fix should be in List class.
size_t mNumSamples;
List<size_t> mSampleSizes;
bool mSamplesHaveSameSize;
List<MediaBuffer *> mChunkSamples;
List<off_t> mChunkOffsets;
struct StscTableEntry {
StscTableEntry(uint32_t chunk, uint32_t samples, uint32_t id)
: firstChunk(chunk),
samplesPerChunk(samples),
sampleDescriptionId(id) {}
uint32_t firstChunk;
uint32_t samplesPerChunk;
uint32_t sampleDescriptionId;
};
List<StscTableEntry> mStscTableEntries;
List<int32_t> mStssTableEntries;
List<int64_t> mChunkDurations;
struct SttsTableEntry {
SttsTableEntry(uint32_t count, uint32_t durationUs)
: sampleCount(count), sampleDurationUs(durationUs) {}
uint32_t sampleCount;
uint32_t sampleDurationUs;
};
List<SttsTableEntry> mSttsTableEntries;
void *mCodecSpecificData;
size_t mCodecSpecificDataSize;
bool mGotAllCodecSpecificData;
bool mTrackingProgressStatus;
bool mReachedEOS;
int64_t mStartTimestampUs;
int64_t mPreviousTrackTimeUs;
int64_t mTrackEveryTimeDurationUs;
static void *ThreadWrapper(void *me);
void threadEntry();
status_t makeAVCCodecSpecificData(
const uint8_t *data, size_t size);
void writeOneChunk(bool isAvc);
// Track authoring progress status
void trackProgressStatus(int64_t timeUs, status_t err = OK);
void initTrackingProgressStatus(MetaData *params);
// Utilities for collecting statistical data
void logStatisticalData(bool isAudio);
void findMinAvgMaxSampleDurationMs(
int32_t *min, int32_t *avg, int32_t *max);
void findMinMaxChunkDurations(int64_t *min, int64_t *max);
void getCodecSpecificDataFromInputFormatIfPossible();
Track(const Track &);
Track &operator=(const Track &);
};
#define USE_NALLEN_FOUR 1
MPEG4Writer::MPEG4Writer(const char *filename)
: mFile(fopen(filename, "wb")),
mUse32BitOffset(true),
mPaused(false),
mStarted(false),
mOffset(0),
mMdatOffset(0),
mEstimatedMoovBoxSize(0),
mInterleaveDurationUs(1000000) {
CHECK(mFile != NULL);
}
MPEG4Writer::MPEG4Writer(int fd)
: mFile(fdopen(fd, "wb")),
mUse32BitOffset(true),
mPaused(false),
mStarted(false),
mOffset(0),
mMdatOffset(0),
mEstimatedMoovBoxSize(0),
mInterleaveDurationUs(1000000) {
CHECK(mFile != NULL);
}
MPEG4Writer::~MPEG4Writer() {
stop();
for (List<Track *>::iterator it = mTracks.begin();
it != mTracks.end(); ++it) {
delete *it;
}
mTracks.clear();
}
status_t MPEG4Writer::addSource(const sp<MediaSource> &source) {
Track *track = new Track(this, source);
mTracks.push_back(track);
return OK;
}
status_t MPEG4Writer::startTracks(MetaData *params) {
for (List<Track *>::iterator it = mTracks.begin();
it != mTracks.end(); ++it) {
status_t err = (*it)->start(params);
if (err != OK) {
for (List<Track *>::iterator it2 = mTracks.begin();
it2 != it; ++it2) {
(*it2)->stop();
}
return err;
}
}
return OK;
}
int64_t MPEG4Writer::estimateMoovBoxSize(int32_t bitRate) {
// This implementation is highly experimental/heurisitic.
//
// Statistical analysis shows that metadata usually accounts
// for a small portion of the total file size, usually < 0.6%.
// Currently, lets set to 0.4% for now.
// The default MIN_MOOV_BOX_SIZE is set to 0.4% x 1MB,
// where 1MB is the common file size limit for MMS application.
// The default MAX _MOOV_BOX_SIZE value is based on about 4
// 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 = 4 * 1024; // 4 KB
static const int64_t MAX_MOOV_BOX_SIZE = (180 * 3000000 * 6LL / 8000);
int64_t size = MIN_MOOV_BOX_SIZE;
if (mMaxFileSizeLimitBytes != 0) {
size = mMaxFileSizeLimitBytes * 4 / 1000;
} else if (mMaxFileDurationLimitUs != 0) {
if (bitRate <= 0) {
// We could not estimate the file size since bitRate is not set.
size = MIN_MOOV_BOX_SIZE;
} else {
size = ((mMaxFileDurationLimitUs * bitRate * 4) / 1000 / 8000000);
}
}
if (size < MIN_MOOV_BOX_SIZE) {
size = MIN_MOOV_BOX_SIZE;
}
// Any long duration recording will be probably end up with
// non-streamable mp4 file.
if (size > MAX_MOOV_BOX_SIZE) {
size = MAX_MOOV_BOX_SIZE;
}
LOGI("limits: %lld/%lld bytes/us, bit rate: %d bps and the estimated"
" moov size %lld bytes",
mMaxFileSizeLimitBytes, mMaxFileDurationLimitUs, bitRate, size);
return factor * size;
}
status_t MPEG4Writer::start(MetaData *param) {
if (mFile == NULL) {
return UNKNOWN_ERROR;
}
int32_t use64BitOffset;
if (param &&
param->findInt32(kKey64BitFileOffset, &use64BitOffset) &&
use64BitOffset) {
mUse32BitOffset = false;
}
// System property can overwrite the file offset bits parameter
char value[PROPERTY_VALUE_MAX];
if (property_get("media.stagefright.record-64bits", value, NULL)
&& (!strcmp(value, "1") || !strcasecmp(value, "true"))) {
mUse32BitOffset = false;
}
mStartTimestampUs = -1;
if (mStarted) {
if (mPaused) {
mPaused = false;
return startTracks(param);
}
return OK;
}
if (!param ||
!param->findInt32(kKeyTimeScale, &mTimeScale)) {
mTimeScale = 1000;
}
CHECK(mTimeScale > 0);
LOGV("movie time scale: %d", mTimeScale);
mStreamableFile = true;
mWriteMoovBoxToMemory = false;
mMoovBoxBuffer = NULL;
mMoovBoxBufferOffset = 0;
beginBox("ftyp");
{
int32_t fileType;
if (param && param->findInt32(kKeyFileType, &fileType) &&
fileType != OUTPUT_FORMAT_MPEG_4) {
writeFourcc("3gp4");
} else {
writeFourcc("isom");
}
}
writeInt32(0);
writeFourcc("isom");
writeFourcc("3gp4");
endBox();
mFreeBoxOffset = mOffset;
if (mEstimatedMoovBoxSize == 0) {
int32_t bitRate = -1;
if (param) {
param->findInt32(kKeyBitRate, &bitRate);
}
mEstimatedMoovBoxSize = estimateMoovBoxSize(bitRate);
}
CHECK(mEstimatedMoovBoxSize >= 8);
fseeko(mFile, mFreeBoxOffset, SEEK_SET);
writeInt32(mEstimatedMoovBoxSize);
write("free", 4);
mMdatOffset = mFreeBoxOffset + mEstimatedMoovBoxSize;
mOffset = mMdatOffset;
fseeko(mFile, mMdatOffset, SEEK_SET);
if (mUse32BitOffset) {
write("????mdat", 8);
} else {
write("\x00\x00\x00\x01mdat????????", 16);
}
status_t err = startTracks(param);
if (err != OK) {
return err;
}
mStarted = true;
return OK;
}
void MPEG4Writer::pause() {
if (mFile == NULL) {
return;
}
mPaused = true;
for (List<Track *>::iterator it = mTracks.begin();
it != mTracks.end(); ++it) {
(*it)->pause();
}
}
void MPEG4Writer::stop() {
if (mFile == NULL) {
return;
}
int64_t maxDurationUs = 0;
for (List<Track *>::iterator it = mTracks.begin();
it != mTracks.end(); ++it) {
(*it)->stop();
int64_t durationUs = (*it)->getDurationUs();
if (durationUs > maxDurationUs) {
maxDurationUs = durationUs;
}
}
// Fix up the size of the 'mdat' chunk.
if (mUse32BitOffset) {
fseeko(mFile, mMdatOffset, SEEK_SET);
int32_t size = htonl(static_cast<int32_t>(mOffset - mMdatOffset));
fwrite(&size, 1, 4, mFile);
} else {
fseeko(mFile, mMdatOffset + 8, SEEK_SET);
int64_t size = mOffset - mMdatOffset;
size = hton64(size);
fwrite(&size, 1, 8, mFile);
}
fseeko(mFile, mOffset, SEEK_SET);
time_t now = time(NULL);
const off_t moovOffset = mOffset;
mWriteMoovBoxToMemory = true;
mMoovBoxBuffer = (uint8_t *) malloc(mEstimatedMoovBoxSize);
mMoovBoxBufferOffset = 0;
CHECK(mMoovBoxBuffer != NULL);
int32_t duration = (maxDurationUs * mTimeScale) / 1E6;
beginBox("moov");
beginBox("mvhd");
writeInt32(0); // version=0, flags=0
writeInt32(now); // creation time
writeInt32(now); // modification time
writeInt32(mTimeScale); // mvhd timescale
writeInt32(duration);
writeInt32(0x10000); // rate: 1.0
writeInt16(0x100); // volume
writeInt16(0); // reserved
writeInt32(0); // reserved
writeInt32(0); // reserved
writeInt32(0x10000); // matrix
writeInt32(0);
writeInt32(0);
writeInt32(0);
writeInt32(0x10000);
writeInt32(0);
writeInt32(0);
writeInt32(0);
writeInt32(0x40000000);
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
int32_t id = 1;
for (List<Track *>::iterator it = mTracks.begin();
it != mTracks.end(); ++it, ++id) {
(*it)->writeTrackHeader(id, mUse32BitOffset);
}
endBox(); // moov
mWriteMoovBoxToMemory = false;
if (mStreamableFile) {
CHECK(mMoovBoxBufferOffset + 8 <= mEstimatedMoovBoxSize);
// Moov box
fseeko(mFile, mFreeBoxOffset, SEEK_SET);
mOffset = mFreeBoxOffset;
write(mMoovBoxBuffer, 1, mMoovBoxBufferOffset, mFile);
// Free box
fseeko(mFile, mOffset, SEEK_SET);
writeInt32(mEstimatedMoovBoxSize - mMoovBoxBufferOffset);
write("free", 4);
// Free temp memory
free(mMoovBoxBuffer);
mMoovBoxBuffer = NULL;
mMoovBoxBufferOffset = 0;
} else {
LOGI("The mp4 file will not be streamable.");
}
CHECK(mBoxes.empty());
fflush(mFile);
fclose(mFile);
mFile = NULL;
mStarted = false;
}
status_t MPEG4Writer::setInterleaveDuration(uint32_t durationUs) {
mInterleaveDurationUs = durationUs;
return OK;
}
void MPEG4Writer::lock() {
mLock.lock();
}
void MPEG4Writer::unlock() {
mLock.unlock();
}
off_t MPEG4Writer::addSample_l(MediaBuffer *buffer) {
off_t old_offset = mOffset;
fwrite((const uint8_t *)buffer->data() + buffer->range_offset(),
1, buffer->range_length(), mFile);
mOffset += buffer->range_length();
return old_offset;
}
static void StripStartcode(MediaBuffer *buffer) {
if (buffer->range_length() < 4) {
return;
}
const uint8_t *ptr =
(const uint8_t *)buffer->data() + buffer->range_offset();
if (!memcmp(ptr, "\x00\x00\x00\x01", 4)) {
buffer->set_range(
buffer->range_offset() + 4, buffer->range_length() - 4);
}
}
off_t MPEG4Writer::addLengthPrefixedSample_l(MediaBuffer *buffer) {
off_t old_offset = mOffset;
size_t length = buffer->range_length();
#if USE_NALLEN_FOUR
uint8_t x = length >> 24;
fwrite(&x, 1, 1, mFile);
x = (length >> 16) & 0xff;
fwrite(&x, 1, 1, mFile);
x = (length >> 8) & 0xff;
fwrite(&x, 1, 1, mFile);
x = length & 0xff;
fwrite(&x, 1, 1, mFile);
#else
CHECK(length < 65536);
uint8_t x = length >> 8;
fwrite(&x, 1, 1, mFile);
x = length & 0xff;
fwrite(&x, 1, 1, mFile);
#endif
fwrite((const uint8_t *)buffer->data() + buffer->range_offset(),
1, length, mFile);
#if USE_NALLEN_FOUR
mOffset += length + 4;
#else
mOffset += length + 2;
#endif
return old_offset;
}
size_t MPEG4Writer::write(
const void *ptr, size_t size, size_t nmemb, FILE *stream) {
const size_t bytes = size * nmemb;
if (mWriteMoovBoxToMemory) {
off_t moovBoxSize = 8 + mMoovBoxBufferOffset + bytes;
if (moovBoxSize > mEstimatedMoovBoxSize) {
for (List<off_t>::iterator it = mBoxes.begin();
it != mBoxes.end(); ++it) {
(*it) += mOffset;
}
fseeko(mFile, mOffset, SEEK_SET);
fwrite(mMoovBoxBuffer, 1, mMoovBoxBufferOffset, stream);
fwrite(ptr, size, nmemb, stream);
mOffset += (bytes + mMoovBoxBufferOffset);
free(mMoovBoxBuffer);
mMoovBoxBuffer = NULL;
mMoovBoxBufferOffset = 0;
mWriteMoovBoxToMemory = false;
mStreamableFile = false;
} else {
memcpy(mMoovBoxBuffer + mMoovBoxBufferOffset, ptr, bytes);
mMoovBoxBufferOffset += bytes;
}
} else {
fwrite(ptr, size, nmemb, stream);
mOffset += bytes;
}
return bytes;
}
void MPEG4Writer::beginBox(const char *fourcc) {
CHECK_EQ(strlen(fourcc), 4);
mBoxes.push_back(mWriteMoovBoxToMemory?
mMoovBoxBufferOffset: mOffset);
writeInt32(0);
writeFourcc(fourcc);
}
void MPEG4Writer::endBox() {
CHECK(!mBoxes.empty());
off_t offset = *--mBoxes.end();
mBoxes.erase(--mBoxes.end());
if (mWriteMoovBoxToMemory) {
int32_t x = htonl(mMoovBoxBufferOffset - offset);
memcpy(mMoovBoxBuffer + offset, &x, 4);
} else {
fseeko(mFile, offset, SEEK_SET);
writeInt32(mOffset - offset);
mOffset -= 4;
fseeko(mFile, mOffset, SEEK_SET);
}
}
void MPEG4Writer::writeInt8(int8_t x) {
write(&x, 1, 1, mFile);
}
void MPEG4Writer::writeInt16(int16_t x) {
x = htons(x);
write(&x, 1, 2, mFile);
}
void MPEG4Writer::writeInt32(int32_t x) {
x = htonl(x);
write(&x, 1, 4, mFile);
}
void MPEG4Writer::writeInt64(int64_t x) {
x = hton64(x);
write(&x, 1, 8, mFile);
}
void MPEG4Writer::writeCString(const char *s) {
size_t n = strlen(s);
write(s, 1, n + 1, mFile);
}
void MPEG4Writer::writeFourcc(const char *s) {
CHECK_EQ(strlen(s), 4);
write(s, 1, 4, mFile);
}
void MPEG4Writer::write(const void *data, size_t size) {
write(data, 1, size, mFile);
}
bool MPEG4Writer::exceedsFileSizeLimit() {
// No limit
if (mMaxFileSizeLimitBytes == 0) {
return false;
}
int64_t nTotalBytesEstimate = static_cast<int64_t>(mEstimatedMoovBoxSize);
for (List<Track *>::iterator it = mTracks.begin();
it != mTracks.end(); ++it) {
nTotalBytesEstimate += (*it)->getEstimatedTrackSizeBytes();
}
return (nTotalBytesEstimate >= mMaxFileSizeLimitBytes);
}
bool MPEG4Writer::exceedsFileDurationLimit() {
// No limit
if (mMaxFileDurationLimitUs == 0) {
return false;
}
for (List<Track *>::iterator it = mTracks.begin();
it != mTracks.end(); ++it) {
if ((*it)->getDurationUs() >= mMaxFileDurationLimitUs) {
return true;
}
}
return false;
}
bool MPEG4Writer::reachedEOS() {
bool allDone = true;
for (List<Track *>::iterator it = mTracks.begin();
it != mTracks.end(); ++it) {
if (!(*it)->reachedEOS()) {
allDone = false;
break;
}
}
return allDone;
}
void MPEG4Writer::setStartTimestampUs(int64_t timeUs) {
LOGI("setStartTimestampUs: %lld", timeUs);
CHECK(timeUs >= 0);
Mutex::Autolock autoLock(mLock);
if (mStartTimestampUs < 0 || mStartTimestampUs > timeUs) {
mStartTimestampUs = timeUs;
LOGI("Earliest track starting time: %lld", mStartTimestampUs);
}
}
int64_t MPEG4Writer::getStartTimestampUs() {
Mutex::Autolock autoLock(mLock);
return mStartTimestampUs;
}
size_t MPEG4Writer::numTracks() {
Mutex::Autolock autolock(mLock);
return mTracks.size();
}
////////////////////////////////////////////////////////////////////////////////
MPEG4Writer::Track::Track(
MPEG4Writer *owner, const sp<MediaSource> &source)
: mOwner(owner),
mMeta(source->getFormat()),
mSource(source),
mDone(false),
mPaused(false),
mResumed(false),
mMaxTimeStampUs(0),
mEstimatedTrackSizeBytes(0),
mSamplesHaveSameSize(true),
mCodecSpecificData(NULL),
mCodecSpecificDataSize(0),
mGotAllCodecSpecificData(false),
mReachedEOS(false) {
getCodecSpecificDataFromInputFormatIfPossible();
if (!mMeta->findInt32(kKeyTimeScale, &mTimeScale)) {
mTimeScale = 1000;
}
CHECK(mTimeScale > 0);
}
void MPEG4Writer::Track::getCodecSpecificDataFromInputFormatIfPossible() {
const char *mime;
CHECK(mMeta->findCString(kKeyMIMEType, &mime));
if (!strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_AVC)) {
uint32_t type;
const void *data;
size_t size;
if (mMeta->findData(kKeyAVCC, &type, &data, &size)) {
mCodecSpecificData = malloc(size);
mCodecSpecificDataSize = size;
memcpy(mCodecSpecificData, data, size);
mGotAllCodecSpecificData = true;
}
} else if (!strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_MPEG4)
|| !strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_AAC)) {
uint32_t type;
const void *data;
size_t size;
if (mMeta->findData(kKeyESDS, &type, &data, &size)) {
ESDS esds(data, size);
if (esds.getCodecSpecificInfo(&data, &size) == OK) {
mCodecSpecificData = malloc(size);
mCodecSpecificDataSize = size;
memcpy(mCodecSpecificData, data, size);
mGotAllCodecSpecificData = true;
}
}
}
}
MPEG4Writer::Track::~Track() {
stop();
if (mCodecSpecificData != NULL) {
free(mCodecSpecificData);
mCodecSpecificData = NULL;
}
}
void MPEG4Writer::Track::initTrackingProgressStatus(MetaData *params) {
LOGV("initTrackingProgressStatus");
mPreviousTrackTimeUs = -1;
mTrackingProgressStatus = false;
mTrackEveryTimeDurationUs = 0;
{
int64_t timeUs;
if (params && params->findInt64(kKeyTrackTimeStatus, &timeUs)) {
LOGV("Receive request to track progress status for every %lld us", timeUs);
mTrackEveryTimeDurationUs = timeUs;
mTrackingProgressStatus = true;
}
}
}
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;
}
initTrackingProgressStatus(params);
sp<MetaData> meta = new MetaData;
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;
mMaxTimeStampUs = 0;
mReachedEOS = false;
mEstimatedTrackSizeBytes = 0;
pthread_create(&mThread, &attr, ThreadWrapper, this);
pthread_attr_destroy(&attr);
return OK;
}
void MPEG4Writer::Track::pause() {
mPaused = true;
}
void MPEG4Writer::Track::stop() {
if (mDone) {
return;
}
mDone = true;
void *dummy;
pthread_join(mThread, &dummy);
mSource->stop();
}
bool MPEG4Writer::Track::reachedEOS() {
return mReachedEOS;
}
// static
void *MPEG4Writer::Track::ThreadWrapper(void *me) {
Track *track = static_cast<Track *>(me);
track->threadEntry();
return NULL;
}
#include <ctype.h>
static void hexdump(const void *_data, size_t size) {
const uint8_t *data = (const uint8_t *)_data;
size_t offset = 0;
while (offset < size) {
printf("0x%04x ", offset);
size_t n = size - offset;
if (n > 16) {
n = 16;
}
for (size_t i = 0; i < 16; ++i) {
if (i == 8) {
printf(" ");
}
if (offset + i < size) {
printf("%02x ", data[offset + i]);
} else {
printf(" ");
}
}
printf(" ");
for (size_t i = 0; i < n; ++i) {
if (isprint(data[offset + i])) {
printf("%c", data[offset + i]);
} else {
printf(".");
}
}
printf("\n");
offset += 16;
}
}
status_t MPEG4Writer::Track::makeAVCCodecSpecificData(
const uint8_t *data, size_t size) {
// hexdump(data, size);
if (mCodecSpecificData != NULL) {
LOGE("Already have codec specific data");
return ERROR_MALFORMED;
}
if (size < 4 || memcmp("\x00\x00\x00\x01", data, 4)) {
LOGE("Must start with a start code");
return ERROR_MALFORMED;
}
size_t picParamOffset = 4;
while (picParamOffset + 3 < size
&& memcmp("\x00\x00\x00\x01", &data[picParamOffset], 4)) {
++picParamOffset;
}
if (picParamOffset + 3 >= size) {
LOGE("Could not find start-code for pictureParameterSet");
return ERROR_MALFORMED;
}
size_t seqParamSetLength = picParamOffset - 4;
size_t picParamSetLength = size - picParamOffset - 4;
mCodecSpecificDataSize =
6 + 1 + seqParamSetLength + 2 + picParamSetLength + 2;
mCodecSpecificData = malloc(mCodecSpecificDataSize);
uint8_t *header = (uint8_t *)mCodecSpecificData;
header[0] = 1;
header[1] = 0x42; // profile
header[2] = 0x80;
header[3] = 0x1e; // level
#if USE_NALLEN_FOUR
header[4] = 0xfc | 3; // length size == 4 bytes
#else
header[4] = 0xfc | 1; // length size == 2 bytes
#endif
header[5] = 0xe0 | 1;
header[6] = seqParamSetLength >> 8;
header[7] = seqParamSetLength & 0xff;
memcpy(&header[8], &data[4], seqParamSetLength);
header += 8 + seqParamSetLength;
header[0] = 1;
header[1] = picParamSetLength >> 8;
header[2] = picParamSetLength & 0xff;
memcpy(&header[3], &data[picParamOffset + 4], picParamSetLength);
return OK;
}
static bool collectStatisticalData() {
char value[PROPERTY_VALUE_MAX];
if (property_get("media.stagefright.record-stats", value, NULL)
&& (!strcmp(value, "1") || !strcasecmp(value, "true"))) {
return true;
}
return false;
}
void MPEG4Writer::Track::threadEntry() {
sp<MetaData> meta = mSource->getFormat();
const char *mime;
meta->findCString(kKeyMIMEType, &mime);
bool is_mpeg4 = !strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_MPEG4) ||
!strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_AAC);
bool is_avc = !strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_AVC);
bool is_audio = !strncasecmp(mime, "audio/", 6);
int32_t count = 0;
const int64_t interleaveDurationUs = mOwner->interleaveDuration();
int64_t chunkTimestampUs = 0;
int32_t nChunks = 0;
int32_t nZeroLengthFrames = 0;
int64_t lastTimestampUs = 0; // Previous sample time stamp in ms
int64_t lastDurationUs = 0; // Between the previous two samples in ms
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;
sp<MetaData> meta_data;
bool collectStats = collectStatisticalData();
mNumSamples = 0;
status_t err = OK;
MediaBuffer *buffer;
while (!mDone && (err = mSource->read(&buffer)) == OK) {
if (buffer->range_length() == 0) {
buffer->release();
buffer = NULL;
++nZeroLengthFrames;
continue;
}
// If the codec specific data has not been received yet, delay pause.
// After the codec specific data is received, discard what we received
// when the track is to be paused.
if (mPaused && !mResumed) {
buffer->release();
buffer = NULL;
continue;
}
++count;
int32_t isCodecConfig;
if (buffer->meta_data()->findInt32(kKeyIsCodecConfig, &isCodecConfig)
&& isCodecConfig) {
CHECK(!mGotAllCodecSpecificData);
if (is_avc) {
status_t err = makeAVCCodecSpecificData(
(const uint8_t *)buffer->data()
+ buffer->range_offset(),
buffer->range_length());
CHECK_EQ(OK, err);
} else if (is_mpeg4) {
mCodecSpecificDataSize = buffer->range_length();
mCodecSpecificData = malloc(mCodecSpecificDataSize);
memcpy(mCodecSpecificData,
(const uint8_t *)buffer->data()
+ buffer->range_offset(),
buffer->range_length());
}
buffer->release();
buffer = NULL;
mGotAllCodecSpecificData = true;
continue;
} else if (!mGotAllCodecSpecificData &&
count == 1 && is_mpeg4 && mCodecSpecificData == NULL) {
// The TI mpeg4 encoder does not properly set the
// codec-specific-data flag.
const uint8_t *data =
(const uint8_t *)buffer->data() + buffer->range_offset();
const size_t size = buffer->range_length();
size_t offset = 0;
while (offset + 3 < size) {
if (data[offset] == 0x00 && data[offset + 1] == 0x00
&& data[offset + 2] == 0x01 && data[offset + 3] == 0xb6) {
break;
}
++offset;
}
// CHECK(offset + 3 < size);
if (offset + 3 >= size) {
// XXX assume the entire first chunk of data is the codec specific
// data.
offset = size;
}
mCodecSpecificDataSize = offset;
mCodecSpecificData = malloc(offset);
memcpy(mCodecSpecificData, data, offset);
buffer->set_range(buffer->range_offset() + offset, size - offset);
if (size == offset) {
buffer->release();
buffer = NULL;
continue;
}
mGotAllCodecSpecificData = true;
} else if (!mGotAllCodecSpecificData && is_avc && count < 3) {
// The TI video encoder does not flag codec specific data
// as such and also splits up SPS and PPS across two buffers.
const uint8_t *data =
(const uint8_t *)buffer->data() + buffer->range_offset();
size_t size = buffer->range_length();
CHECK(count == 2 || mCodecSpecificData == NULL);
size_t offset = mCodecSpecificDataSize;
mCodecSpecificDataSize += size + 4;
mCodecSpecificData =
realloc(mCodecSpecificData, mCodecSpecificDataSize);
memcpy((uint8_t *)mCodecSpecificData + offset,
"\x00\x00\x00\x01", 4);
memcpy((uint8_t *)mCodecSpecificData + offset + 4, data, size);
buffer->release();
buffer = NULL;
if (count == 2) {
void *tmp = mCodecSpecificData;
size = mCodecSpecificDataSize;
mCodecSpecificData = NULL;
mCodecSpecificDataSize = 0;
status_t err = makeAVCCodecSpecificData(
(const uint8_t *)tmp, size);
free(tmp);
tmp = NULL;
CHECK_EQ(OK, err);
mGotAllCodecSpecificData = true;
}
continue;
}
if (!mGotAllCodecSpecificData) {
mGotAllCodecSpecificData = true;
}
// Make a deep copy of the MediaBuffer and Metadata and release
// the original as soon as we can
MediaBuffer *copy = new MediaBuffer(buffer->range_length());
memcpy(copy->data(), (uint8_t *)buffer->data() + buffer->range_offset(),
buffer->range_length());
copy->set_range(0, buffer->range_length());
meta_data = new MetaData(*buffer->meta_data().get());
buffer->release();
buffer = NULL;
if (is_avc) StripStartcode(copy);
size_t sampleSize;
sampleSize = is_avc
#if USE_NALLEN_FOUR
? copy->range_length() + 4
#else
? copy->range_length() + 2
#endif
: copy->range_length();
// Max file size or duration handling
mEstimatedTrackSizeBytes += sampleSize;
if (mOwner->exceedsFileSizeLimit()) {
mOwner->notify(MEDIA_RECORDER_EVENT_INFO, MEDIA_RECORDER_INFO_MAX_FILESIZE_REACHED, 0);
break;
}
if (mOwner->exceedsFileDurationLimit()) {
mOwner->notify(MEDIA_RECORDER_EVENT_INFO, MEDIA_RECORDER_INFO_MAX_DURATION_REACHED, 0);
break;
}
int32_t isSync = false;
meta_data->findInt32(kKeyIsSyncFrame, &isSync);
int64_t timestampUs;
CHECK(meta_data->findInt64(kKeyTime, &timestampUs));
////////////////////////////////////////////////////////////////////////////////
if (mSampleSizes.empty()) {
mStartTimestampUs = timestampUs;
mOwner->setStartTimestampUs(mStartTimestampUs);
}
if (mResumed) {
previousPausedDurationUs += (timestampUs - mMaxTimeStampUs - lastDurationUs);
mResumed = false;
}
timestampUs -= previousPausedDurationUs;
LOGV("time stamp: %lld and previous paused duration %lld",
timestampUs, previousPausedDurationUs);
if (timestampUs > mMaxTimeStampUs) {
mMaxTimeStampUs = timestampUs;
}
mSampleSizes.push_back(sampleSize);
++mNumSamples;
if (mNumSamples > 2) {
if (lastDurationUs != timestampUs - lastTimestampUs) {
SttsTableEntry sttsEntry(sampleCount, lastDurationUs);
mSttsTableEntries.push_back(sttsEntry);
sampleCount = 1;
} else {
++sampleCount;
}
}
if (mSamplesHaveSameSize) {
if (mNumSamples >= 2 && previousSampleSize != sampleSize) {
mSamplesHaveSameSize = false;
}
previousSampleSize = sampleSize;
}
lastDurationUs = timestampUs - lastTimestampUs;
lastTimestampUs = timestampUs;
if (isSync != 0) {
mStssTableEntries.push_back(mNumSamples);
}
if (mTrackingProgressStatus) {
if (mPreviousTrackTimeUs <= 0) {
mPreviousTrackTimeUs = mStartTimestampUs;
}
trackProgressStatus(timestampUs);
}
if (mOwner->numTracks() == 1) {
off_t offset = is_avc? mOwner->addLengthPrefixedSample_l(copy)
: mOwner->addSample_l(copy);
if (mChunkOffsets.empty()) {
mChunkOffsets.push_back(offset);
}
copy->release();
copy = NULL;
continue;
}
mChunkSamples.push_back(copy);
if (interleaveDurationUs == 0) {
StscTableEntry stscEntry(++nChunks, 1, 1);
mStscTableEntries.push_back(stscEntry);
writeOneChunk(is_avc);
} else {
if (chunkTimestampUs == 0) {
chunkTimestampUs = timestampUs;
} else {
if (timestampUs - chunkTimestampUs > interleaveDurationUs) {
++nChunks;
if (collectStats) {
mChunkDurations.push_back(timestampUs - chunkTimestampUs);
}
if (nChunks == 1 || // First chunk
(--(mStscTableEntries.end()))->samplesPerChunk !=
mChunkSamples.size()) {
StscTableEntry stscEntry(nChunks,
mChunkSamples.size(), 1);
mStscTableEntries.push_back(stscEntry);
}
writeOneChunk(is_avc);
chunkTimestampUs = timestampUs;
}
}
}
}
if (mSampleSizes.empty()) {
err = UNKNOWN_ERROR;
}
mOwner->trackProgressStatus(this, -1, err);
// Last chunk
if (mOwner->numTracks() == 1) {
StscTableEntry stscEntry(1, mNumSamples, 1);
mStscTableEntries.push_back(stscEntry);
} else if (!mChunkSamples.empty()) {
++nChunks;
StscTableEntry stscEntry(nChunks, mChunkSamples.size(), 1);
mStscTableEntries.push_back(stscEntry);
writeOneChunk(is_avc);
}
// We don't really know how long the last frame lasts, since
// there is no frame time after it, just repeat the previous
// frame's duration.
if (mNumSamples == 1) {
lastDurationUs = 0; // A single sample's duration
} else {
++sampleCount; // Count for the last sample
}
SttsTableEntry sttsEntry(sampleCount, lastDurationUs);
mSttsTableEntries.push_back(sttsEntry);
mReachedEOS = true;
LOGI("Received total/0-length (%d/%d) buffers and encoded %d frames - %s",
count, nZeroLengthFrames, mNumSamples, is_audio? "audio": "video");
logStatisticalData(is_audio);
}
void MPEG4Writer::Track::trackProgressStatus(int64_t timeUs, status_t err) {
LOGV("trackProgressStatus: %lld us", timeUs);
if (mTrackEveryTimeDurationUs > 0 &&
timeUs - mPreviousTrackTimeUs >= mTrackEveryTimeDurationUs) {
LOGV("Fire time tracking progress status at %lld us", timeUs);
mOwner->trackProgressStatus(this, timeUs - mPreviousTrackTimeUs, err);
mPreviousTrackTimeUs = timeUs;
}
}
void MPEG4Writer::trackProgressStatus(
const MPEG4Writer::Track* track, int64_t timeUs, status_t err) {
Mutex::Autolock lock(mLock);
int32_t nTracks = mTracks.size();
CHECK(nTracks >= 1);
CHECK(nTracks < 64); // Arbitrary number
int32_t trackNum = 0;
#if 0
// In the worst case, we can put the trackNum
// along with MEDIA_RECORDER_INFO_COMPLETION_STATUS
// to report the progress.
for (List<Track *>::iterator it = mTracks.begin();
it != mTracks.end(); ++it, ++trackNum) {
if (track == (*it)) {
break;
}
}
#endif
CHECK(trackNum < nTracks);
trackNum <<= 16;
// Error notification
// Do not consider ERROR_END_OF_STREAM an error
if (err != OK && err != ERROR_END_OF_STREAM) {
notify(MEDIA_RECORDER_EVENT_ERROR,
trackNum | MEDIA_RECORDER_ERROR_UNKNOWN,
err);
return;
}
if (timeUs == -1) {
// Send completion notification
notify(MEDIA_RECORDER_EVENT_INFO,
trackNum | MEDIA_RECORDER_INFO_COMPLETION_STATUS,
err);
return;
} else {
// Send progress status
notify(MEDIA_RECORDER_EVENT_INFO,
trackNum | MEDIA_RECORDER_INFO_PROGRESS_TIME_STATUS,
timeUs / 1000);
}
}
void MPEG4Writer::Track::findMinAvgMaxSampleDurationMs(
int32_t *min, int32_t *avg, int32_t *max) {
CHECK(!mSampleSizes.empty());
int32_t avgSampleDurationMs = mMaxTimeStampUs / 1000 / mNumSamples;
int32_t minSampleDurationMs = 0x7FFFFFFF;
int32_t maxSampleDurationMs = 0;
for (List<SttsTableEntry>::iterator it = mSttsTableEntries.begin();
it != mSttsTableEntries.end(); ++it) {
int32_t sampleDurationMs =
(static_cast<int32_t>(it->sampleDurationUs) + 500) / 1000;
if (sampleDurationMs > maxSampleDurationMs) {
maxSampleDurationMs = sampleDurationMs;
} else if (sampleDurationMs < minSampleDurationMs) {
minSampleDurationMs = sampleDurationMs;
}
LOGI("sample duration: %d ms", sampleDurationMs);
}
CHECK(minSampleDurationMs != 0);
CHECK(avgSampleDurationMs != 0);
CHECK(maxSampleDurationMs != 0);
*min = minSampleDurationMs;
*avg = avgSampleDurationMs;
*max = maxSampleDurationMs;
}
// Don't count the last duration
void MPEG4Writer::Track::findMinMaxChunkDurations(int64_t *min, int64_t *max) {
int64_t duration = mOwner->interleaveDuration();
int64_t minChunkDuration = duration;
int64_t maxChunkDuration = duration;
if (mChunkDurations.size() > 1) {
for (List<int64_t>::iterator it = mChunkDurations.begin();
it != --mChunkDurations.end(); ++it) {
if (minChunkDuration > (*it)) {
minChunkDuration = (*it);
} else if (maxChunkDuration < (*it)) {
maxChunkDuration = (*it);
}
}
}
*min = minChunkDuration;
*max = maxChunkDuration;
}
void MPEG4Writer::Track::logStatisticalData(bool isAudio) {
if (mMaxTimeStampUs <= 0 || mSampleSizes.empty()) {
LOGI("nothing is recorded");
return;
}
bool collectStats = collectStatisticalData();
if (collectStats) {
LOGI("%s track - duration %lld us, total %d frames",
isAudio? "audio": "video", mMaxTimeStampUs,
mNumSamples);
int32_t min, avg, max;
findMinAvgMaxSampleDurationMs(&min, &avg, &max);
LOGI("min/avg/max sample duration (ms): %d/%d/%d", min, avg, max);
if (!isAudio) {
float avgFps = 1000.0 / avg;
float minFps = 1000.0 / max;
float maxFps = 1000.0 / min;
LOGI("min/avg/max frame rate (fps): %.2f/%.2f/%.2f",
minFps, avgFps, maxFps);
}
int64_t totalBytes = 0;
for (List<size_t>::iterator it = mSampleSizes.begin();
it != mSampleSizes.end(); ++it) {
totalBytes += (*it);
}
float bitRate = (totalBytes * 8000000.0) / mMaxTimeStampUs;
LOGI("avg bit rate (bps): %.2f", bitRate);
int64_t duration = mOwner->interleaveDuration();
if (duration != 0) { // If interleaving is enabled
int64_t minChunk, maxChunk;
findMinMaxChunkDurations(&minChunk, &maxChunk);
LOGI("min/avg/max chunk duration (ms): %lld/%lld/%lld",
minChunk, duration, maxChunk);
}
}
}
void MPEG4Writer::Track::writeOneChunk(bool isAvc) {
mOwner->lock();
for (List<MediaBuffer *>::iterator it = mChunkSamples.begin();
it != mChunkSamples.end(); ++it) {
off_t offset = isAvc? mOwner->addLengthPrefixedSample_l(*it)
: mOwner->addSample_l(*it);
if (it == mChunkSamples.begin()) {
mChunkOffsets.push_back(offset);
}
}
mOwner->unlock();
while (!mChunkSamples.empty()) {
List<MediaBuffer *>::iterator it = mChunkSamples.begin();
(*it)->release();
(*it) = NULL;
mChunkSamples.erase(it);
}
mChunkSamples.clear();
}
int64_t MPEG4Writer::Track::getDurationUs() const {
return mMaxTimeStampUs;
}
int64_t MPEG4Writer::Track::getEstimatedTrackSizeBytes() const {
return mEstimatedTrackSizeBytes;
}
void MPEG4Writer::Track::writeTrackHeader(
int32_t trackID, bool use32BitOffset) {
const char *mime;
bool success = mMeta->findCString(kKeyMIMEType, &mime);
CHECK(success);
bool is_audio = !strncasecmp(mime, "audio/", 6);
LOGV("%s track time scale: %d",
is_audio? "Audio": "Video", mTimeScale);
time_t now = time(NULL);
int32_t mvhdTimeScale = mOwner->getTimeScale();
int64_t trakDurationUs = getDurationUs();
mOwner->beginBox("trak");
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(trackID);
mOwner->writeInt32(0); // reserved
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(is_audio ? 0x100 : 0); // volume
mOwner->writeInt16(0); // reserved
mOwner->writeInt32(0x10000); // matrix
mOwner->writeInt32(0);
mOwner->writeInt32(0);
mOwner->writeInt32(0);
mOwner->writeInt32(0x10000);
mOwner->writeInt32(0);
mOwner->writeInt32(0);
mOwner->writeInt32(0);
mOwner->writeInt32(0x40000000);
if (is_audio) {
mOwner->writeInt32(0);
mOwner->writeInt32(0);
} else {
int32_t width, height;
bool success = mMeta->findInt32(kKeyWidth, &width);
success = success && mMeta->findInt32(kKeyHeight, &height);
CHECK(success);
mOwner->writeInt32(width << 16); // 32-bit fixed-point value
mOwner->writeInt32(height << 16); // 32-bit fixed-point value
}
mOwner->endBox(); // tkhd
int64_t moovStartTimeUs = mOwner->getStartTimestampUs();
if (mStartTimestampUs != moovStartTimeUs) {
mOwner->beginBox("edts");
mOwner->beginBox("elst");
mOwner->writeInt32(0); // version=0, flags=0: 32-bit time
mOwner->writeInt32(2); // never ends with an empty list
// First elst entry: specify the starting time offset
int64_t offsetUs = mStartTimestampUs - moovStartTimeUs;
int32_t seg = (offsetUs * mvhdTimeScale + 5E5) / 1E6;
mOwner->writeInt32(seg); // in mvhd timecale
mOwner->writeInt32(-1); // starting time offset
mOwner->writeInt32(1 << 16); // rate = 1.0
// Second elst entry: specify the track duration
seg = (trakDurationUs * mvhdTimeScale + 5E5) / 1E6;
mOwner->writeInt32(seg); // in mvhd timescale
mOwner->writeInt32(0);
mOwner->writeInt32(1 << 16);
mOwner->endBox();
mOwner->endBox();
}
mOwner->beginBox("mdia");
mOwner->beginBox("mdhd");
mOwner->writeInt32(0); // version=0, flags=0
mOwner->writeInt32(now); // creation time
mOwner->writeInt32(now); // modification time
mOwner->writeInt32(mTimeScale); // media timescale
int32_t mdhdDuration = (trakDurationUs * mTimeScale + 5E5) / 1E6;
mOwner->writeInt32(mdhdDuration); // use media timescale
// Language follows the three letter standard ISO-639-2/T
// 'e', 'n', 'g' for "English", for instance.
// Each character is packed as the difference between its ASCII value and 0x60.
// For "English", these are 00101, 01110, 00111.
// XXX: Where is the padding bit located: 0x15C7?
mOwner->writeInt16(0); // language code
mOwner->writeInt16(0); // predefined
mOwner->endBox();
mOwner->beginBox("hdlr");
mOwner->writeInt32(0); // version=0, flags=0
mOwner->writeInt32(0); // component type: should be mhlr
mOwner->writeFourcc(is_audio ? "soun" : "vide"); // component subtype
mOwner->writeInt32(0); // reserved
mOwner->writeInt32(0); // reserved
mOwner->writeInt32(0); // reserved
// Removing "r" for the name string just makes the string 4 byte aligned
mOwner->writeCString(is_audio ? "SoundHandle": "VideoHandle"); // name
mOwner->endBox();
mOwner->beginBox("minf");
if (is_audio) {
mOwner->beginBox("smhd");
mOwner->writeInt32(0); // version=0, flags=0
mOwner->writeInt16(0); // balance
mOwner->writeInt16(0); // reserved
mOwner->endBox();
} else {
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();
}
mOwner->beginBox("dinf");
mOwner->beginBox("dref");
mOwner->writeInt32(0); // version=0, flags=0
mOwner->writeInt32(1); // entry count (either url or urn)
// 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
mOwner->endBox(); // dref
mOwner->endBox(); // dinf
mOwner->beginBox("stbl");
mOwner->beginBox("stsd");
mOwner->writeInt32(0); // version=0, flags=0
mOwner->writeInt32(1); // entry count
if (is_audio) {
const char *fourcc = NULL;
if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AMR_NB, mime)) {
fourcc = "samr";
} else if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AMR_WB, mime)) {
fourcc = "sawb";
} else if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AAC, mime)) {
fourcc = "mp4a";
} else {
LOGE("Unknown mime type '%s'.", mime);
CHECK(!"should not be here, unknown mime type.");
}
mOwner->beginBox(fourcc); // audio format
mOwner->writeInt32(0); // reserved
mOwner->writeInt16(0); // reserved
mOwner->writeInt16(0x1); // data ref index
mOwner->writeInt32(0); // reserved
mOwner->writeInt32(0); // reserved
int32_t nChannels;
CHECK_EQ(true, mMeta->findInt32(kKeyChannelCount, &nChannels));
mOwner->writeInt16(nChannels); // channel count
mOwner->writeInt16(16); // sample size
mOwner->writeInt16(0); // predefined
mOwner->writeInt16(0); // reserved
int32_t samplerate;
bool success = mMeta->findInt32(kKeySampleRate, &samplerate);
CHECK(success);
mOwner->writeInt32(samplerate << 16);
if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AAC, mime)) {
mOwner->beginBox("esds");
mOwner->writeInt32(0); // version=0, flags=0
mOwner->writeInt8(0x03); // ES_DescrTag
mOwner->writeInt8(23 + mCodecSpecificDataSize);
mOwner->writeInt16(0x0000);// ES_ID
mOwner->writeInt8(0x00);
mOwner->writeInt8(0x04); // DecoderConfigDescrTag
mOwner->writeInt8(15 + mCodecSpecificDataSize);
mOwner->writeInt8(0x40); // objectTypeIndication ISO/IEC 14492-2
mOwner->writeInt8(0x15); // streamType AudioStream
mOwner->writeInt16(0x03); // XXX
mOwner->writeInt8(0x00); // buffer size 24-bit
mOwner->writeInt32(96000); // max bit rate
mOwner->writeInt32(96000); // avg bit rate
mOwner->writeInt8(0x05); // DecoderSpecificInfoTag
mOwner->writeInt8(mCodecSpecificDataSize);
mOwner->write(mCodecSpecificData, mCodecSpecificDataSize);
static const uint8_t kData2[] = {
0x06, // SLConfigDescriptorTag
0x01,
0x02
};
mOwner->write(kData2, sizeof(kData2));
mOwner->endBox(); // esds
} else if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AMR_NB, mime) ||
!strcasecmp(MEDIA_MIMETYPE_AUDIO_AMR_WB, mime)) {
// 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();
}
mOwner->endBox();
} else {
if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_MPEG4, mime)) {
mOwner->beginBox("mp4v");
} else if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_H263, mime)) {
mOwner->beginBox("s263");
} else if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_AVC, mime)) {
mOwner->beginBox("avc1");
} else {
LOGE("Unknown mime type '%s'.", mime);
CHECK(!"should not be here, unknown mime type.");
}
mOwner->writeInt32(0); // reserved
mOwner->writeInt16(0); // reserved
mOwner->writeInt16(1); // data ref index
mOwner->writeInt16(0); // predefined
mOwner->writeInt16(0); // reserved
mOwner->writeInt32(0); // predefined
mOwner->writeInt32(0); // predefined
mOwner->writeInt32(0); // predefined
int32_t width, height;
bool success = mMeta->findInt32(kKeyWidth, &width);
success = success && mMeta->findInt32(kKeyHeight, &height);
CHECK(success);
mOwner->writeInt16(width);
mOwner->writeInt16(height);
mOwner->writeInt32(0x480000); // horiz resolution
mOwner->writeInt32(0x480000); // vert resolution
mOwner->writeInt32(0); // reserved
mOwner->writeInt16(1); // frame count
mOwner->write(" ", 32);
mOwner->writeInt16(0x18); // depth
mOwner->writeInt16(-1); // predefined
CHECK(23 + mCodecSpecificDataSize < 128);
if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_MPEG4, mime)) {
mOwner->beginBox("esds");
mOwner->writeInt32(0); // version=0, flags=0
mOwner->writeInt8(0x03); // ES_DescrTag
mOwner->writeInt8(23 + mCodecSpecificDataSize);
mOwner->writeInt16(0x0000); // ES_ID
mOwner->writeInt8(0x1f);
mOwner->writeInt8(0x04); // DecoderConfigDescrTag
mOwner->writeInt8(15 + mCodecSpecificDataSize);
mOwner->writeInt8(0x20); // objectTypeIndication ISO/IEC 14492-2
mOwner->writeInt8(0x11); // streamType VisualStream
static const uint8_t kData[] = {
0x01, 0x77, 0x00,
0x00, 0x03, 0xe8, 0x00,
0x00, 0x03, 0xe8, 0x00
};
mOwner->write(kData, sizeof(kData));
mOwner->writeInt8(0x05); // DecoderSpecificInfoTag
mOwner->writeInt8(mCodecSpecificDataSize);
mOwner->write(mCodecSpecificData, mCodecSpecificDataSize);
static const uint8_t kData2[] = {
0x06, // SLConfigDescriptorTag
0x01,
0x02
};
mOwner->write(kData2, sizeof(kData2));
mOwner->endBox(); // esds
} else if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_H263, mime)) {
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
} else if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_AVC, mime)) {
mOwner->beginBox("avcC");
mOwner->write(mCodecSpecificData, mCodecSpecificDataSize);
mOwner->endBox(); // avcC
}
mOwner->beginBox("pasp");
// This is useful if the pixel is not square
mOwner->writeInt32(1 << 16); // hspacing
mOwner->writeInt32(1 << 16); // vspacing
mOwner->endBox(); // pasp
mOwner->endBox(); // mp4v, s263 or avc1
}
mOwner->endBox(); // stsd
mOwner->beginBox("stts");
mOwner->writeInt32(0); // version=0, flags=0
mOwner->writeInt32(mSttsTableEntries.size());
for (List<SttsTableEntry>::iterator it = mSttsTableEntries.begin();
it != mSttsTableEntries.end(); ++it) {
mOwner->writeInt32(it->sampleCount);
int32_t dur = (it->sampleDurationUs * mTimeScale + 5E5) / 1E6;
mOwner->writeInt32(dur);
}
mOwner->endBox(); // stts
if (!is_audio) {
mOwner->beginBox("stss");
mOwner->writeInt32(0); // version=0, flags=0
mOwner->writeInt32(mStssTableEntries.size()); // number of sync frames
for (List<int32_t>::iterator it = mStssTableEntries.begin();
it != mStssTableEntries.end(); ++it) {
mOwner->writeInt32(*it);
}
mOwner->endBox(); // stss
}
mOwner->beginBox("stsz");
mOwner->writeInt32(0); // version=0, flags=0
if (mSamplesHaveSameSize) {
List<size_t>::iterator it = mSampleSizes.begin();
mOwner->writeInt32(*it); // default sample size
} else {
mOwner->writeInt32(0);
}
mOwner->writeInt32(mNumSamples);
if (!mSamplesHaveSameSize) {
for (List<size_t>::iterator it = mSampleSizes.begin();
it != mSampleSizes.end(); ++it) {
mOwner->writeInt32(*it);
}
}
mOwner->endBox(); // stsz
mOwner->beginBox("stsc");
mOwner->writeInt32(0); // version=0, flags=0
mOwner->writeInt32(mStscTableEntries.size());
for (List<StscTableEntry>::iterator it = mStscTableEntries.begin();
it != mStscTableEntries.end(); ++it) {
mOwner->writeInt32(it->firstChunk);
mOwner->writeInt32(it->samplesPerChunk);
mOwner->writeInt32(it->sampleDescriptionId);
}
mOwner->endBox(); // stsc
mOwner->beginBox(use32BitOffset? "stco": "co64");
mOwner->writeInt32(0); // version=0, flags=0
mOwner->writeInt32(mChunkOffsets.size());
for (List<off_t>::iterator it = mChunkOffsets.begin();
it != mChunkOffsets.end(); ++it) {
if (use32BitOffset) {
mOwner->writeInt32(static_cast<int32_t>(*it));
} else {
mOwner->writeInt64((*it));
}
}
mOwner->endBox(); // stco or co64
mOwner->endBox(); // stbl
mOwner->endBox(); // minf
mOwner->endBox(); // mdia
mOwner->endBox(); // trak
}
} // namespace android