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-rw-r--r--include/media/stagefright/MPEG4Writer.h1
-rw-r--r--media/libstagefright/MPEG4Writer.cpp137
2 files changed, 104 insertions, 34 deletions
diff --git a/include/media/stagefright/MPEG4Writer.h b/include/media/stagefright/MPEG4Writer.h
index 9716e98..52b93e1 100644
--- a/include/media/stagefright/MPEG4Writer.h
+++ b/include/media/stagefright/MPEG4Writer.h
@@ -144,6 +144,7 @@ private:
inline size_t write(const void *ptr, size_t size, size_t nmemb, FILE* stream);
bool exceedsFileSizeLimit();
+ bool use32BitFileOffset() const;
bool exceedsFileDurationLimit();
void trackProgressStatus(const Track* track, int64_t timeUs, status_t err = OK);
diff --git a/media/libstagefright/MPEG4Writer.cpp b/media/libstagefright/MPEG4Writer.cpp
index af2b4c4..5dcbc22 100644
--- a/media/libstagefright/MPEG4Writer.cpp
+++ b/media/libstagefright/MPEG4Writer.cpp
@@ -38,6 +38,7 @@
namespace android {
+static const int64_t kMax32BitFileSize = 0x007fffffffLL;
static const uint8_t kNalUnitTypeSeqParamSet = 0x07;
static const uint8_t kNalUnitTypePicParamSet = 0x08;
@@ -59,7 +60,7 @@ public:
bool isAvc() const { return mIsAvc; }
bool isAudio() const { return mIsAudio; }
bool isMPEG4() const { return mIsMPEG4; }
- void addChunkOffset(off_t offset) { mChunkOffsets.push_back(offset); }
+ void addChunkOffset(off_t offset);
status_t dump(int fd, const Vector<String16>& args) const;
private:
@@ -79,7 +80,7 @@ private:
bool mIsRealTimeRecording;
int64_t mMaxTimeStampUs;
int64_t mEstimatedTrackSizeBytes;
- int64_t mMaxWriteTimeUs;
+ int64_t mMdatSizeBytes;
int32_t mTimeScale;
pthread_t mThread;
@@ -92,8 +93,11 @@ private:
bool mSamplesHaveSameSize;
List<MediaBuffer *> mChunkSamples;
+
+ size_t mNumStcoTableEntries;
List<off_t> mChunkOffsets;
+ size_t mNumStscTableEntries;
struct StscTableEntry {
StscTableEntry(uint32_t chunk, uint32_t samples, uint32_t id)
@@ -107,9 +111,11 @@ private:
};
List<StscTableEntry> mStscTableEntries;
+ size_t mNumStssTableEntries;
List<int32_t> mStssTableEntries;
List<int64_t> mChunkDurations;
+ size_t mNumSttsTableEntries;
struct SttsTableEntry {
SttsTableEntry(uint32_t count, uint32_t durationUs)
@@ -178,6 +184,11 @@ private:
// 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);
+ void addOneSttsTableEntry(size_t sampleCount, int64_t durationUs);
+
Track(const Track &);
Track &operator=(const Track &);
};
@@ -211,9 +222,11 @@ MPEG4Writer::MPEG4Writer(int fd)
MPEG4Writer::~MPEG4Writer() {
stop();
- for (List<Track *>::iterator it = mTracks.begin();
- it != mTracks.end(); ++it) {
+ while (!mTracks.empty()) {
+ List<Track *>::iterator it = mTracks.begin();
delete *it;
+ (*it) = NULL;
+ mTracks.erase(it);
}
mTracks.clear();
}
@@ -332,6 +345,21 @@ status_t MPEG4Writer::start(MetaData *param) {
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) {
+ LOGE("32-bit file size limit too big: %lld bytes",
+ mMaxFileSizeLimitBytes);
+ return UNKNOWN_ERROR;
+ }
+ }
+
// System property can overwrite the file offset bits parameter
char value[PROPERTY_VALUE_MAX];
if (property_get("media.stagefright.record-64bits", value, NULL)
@@ -413,6 +441,10 @@ status_t MPEG4Writer::start(MetaData *param) {
return OK;
}
+bool MPEG4Writer::use32BitFileOffset() const {
+ return mUse32BitOffset;
+}
+
status_t MPEG4Writer::pause() {
if (mFile == NULL) {
return OK;
@@ -739,7 +771,8 @@ bool MPEG4Writer::exceedsFileSizeLimit() {
it != mTracks.end(); ++it) {
nTotalBytesEstimate += (*it)->getEstimatedTrackSizeBytes();
}
- return (nTotalBytesEstimate >= mMaxFileSizeLimitBytes);
+
+ return (nTotalBytesEstimate + 1024 >= mMaxFileSizeLimitBytes);
}
bool MPEG4Writer::exceedsFileDurationLimit() {
@@ -819,6 +852,48 @@ MPEG4Writer::Track::Track(
setTimeScale();
}
+void MPEG4Writer::Track::updateTrackSizeEstimate() {
+
+ int64_t stcoBoxSizeBytes = mOwner->use32BitFileOffset()
+ ? mNumStcoTableEntries * 4
+ : mNumStcoTableEntries * 8;
+
+ int64_t stszBoxSizeBytes = mSamplesHaveSameSize? 4: (mNumSamples * 4);
+
+ mEstimatedTrackSizeBytes = mMdatSizeBytes + // media data size
+ mNumStscTableEntries * 12 + // stsc box size
+ mNumStssTableEntries * 4 + // stss box size
+ mNumSttsTableEntries * 8 + // stts box size
+ stcoBoxSizeBytes + // stco box size
+ stszBoxSizeBytes; // stsz box size
+}
+
+void MPEG4Writer::Track::addOneStscTableEntry(
+ size_t chunkId, size_t sampleId) {
+
+ StscTableEntry stscEntry(chunkId, sampleId, 1);
+ mStscTableEntries.push_back(stscEntry);
+ ++mNumStscTableEntries;
+}
+
+void MPEG4Writer::Track::addOneStssTableEntry(size_t sampleId) {
+ mStssTableEntries.push_back(sampleId);
+ ++mNumStssTableEntries;
+}
+
+void MPEG4Writer::Track::addOneSttsTableEntry(
+ size_t sampleCount, int64_t durationUs) {
+
+ SttsTableEntry sttsEntry(sampleCount, durationUs);
+ mSttsTableEntries.push_back(sttsEntry);
+ ++mNumSttsTableEntries;
+}
+
+void MPEG4Writer::Track::addChunkOffset(off_t offset) {
+ ++mNumStcoTableEntries;
+ mChunkOffsets.push_back(offset);
+}
+
void MPEG4Writer::Track::setTimeScale() {
LOGV("setTimeScale");
// Default time scale
@@ -1039,6 +1114,7 @@ status_t MPEG4Writer::startWriterThread() {
return OK;
}
+
status_t MPEG4Writer::Track::start(MetaData *params) {
if (!mDone && mPaused) {
mPaused = false;
@@ -1077,6 +1153,11 @@ status_t MPEG4Writer::Track::start(MetaData *params) {
mTrackDurationUs = 0;
mReachedEOS = false;
mEstimatedTrackSizeBytes = 0;
+ mNumStcoTableEntries = 0;
+ mNumStssTableEntries = 0;
+ mNumStscTableEntries = 0;
+ mNumSttsTableEntries = 0;
+ mMdatSizeBytes = 0;
pthread_create(&mThread, &attr, ThreadWrapper, this);
pthread_attr_destroy(&attr);
@@ -1434,7 +1515,6 @@ status_t MPEG4Writer::Track::threadEntry() {
bool collectStats = collectStatisticalData();
mNumSamples = 0;
- mMaxWriteTimeUs = 0;
status_t err = OK;
MediaBuffer *buffer;
while (!mDone && (err = mSource->read(&buffer)) == OK) {
@@ -1505,7 +1585,9 @@ status_t MPEG4Writer::Track::threadEntry() {
: copy->range_length();
// Max file size or duration handling
- mEstimatedTrackSizeBytes += sampleSize;
+ mMdatSizeBytes += sampleSize;
+ updateTrackSizeEstimate();
+
if (mOwner->exceedsFileSizeLimit()) {
mOwner->notify(MEDIA_RECORDER_EVENT_INFO, MEDIA_RECORDER_INFO_MAX_FILESIZE_REACHED, 0);
break;
@@ -1587,8 +1669,7 @@ status_t MPEG4Writer::Track::threadEntry() {
(lastTimestampUs * mTimeScale + 500000LL) / 1000000LL);
if (currDurationTicks != lastDurationTicks) {
- SttsTableEntry sttsEntry(sampleCount, lastDurationUs);
- mSttsTableEntries.push_back(sttsEntry);
+ addOneSttsTableEntry(sampleCount, lastDurationUs);
sampleCount = 1;
} else {
++sampleCount;
@@ -1611,7 +1692,7 @@ status_t MPEG4Writer::Track::threadEntry() {
}
if (isSync != 0) {
- mStssTableEntries.push_back(mNumSamples);
+ addOneStssTableEntry(mNumSamples);
}
if (mTrackingProgressStatus) {
@@ -1624,7 +1705,7 @@ status_t MPEG4Writer::Track::threadEntry() {
off_t offset = mIsAvc? mOwner->addLengthPrefixedSample_l(copy)
: mOwner->addSample_l(copy);
if (mChunkOffsets.empty()) {
- mChunkOffsets.push_back(offset);
+ addChunkOffset(offset);
}
copy->release();
copy = NULL;
@@ -1633,8 +1714,7 @@ status_t MPEG4Writer::Track::threadEntry() {
mChunkSamples.push_back(copy);
if (interleaveDurationUs == 0) {
- StscTableEntry stscEntry(++nChunks, 1, 1);
- mStscTableEntries.push_back(stscEntry);
+ addOneStscTableEntry(++nChunks, 1);
bufferChunk(timestampUs);
} else {
if (chunkTimestampUs == 0) {
@@ -1648,9 +1728,7 @@ status_t MPEG4Writer::Track::threadEntry() {
if (nChunks == 1 || // First chunk
(--(mStscTableEntries.end()))->samplesPerChunk !=
mChunkSamples.size()) {
- StscTableEntry stscEntry(nChunks,
- mChunkSamples.size(), 1);
- mStscTableEntries.push_back(stscEntry);
+ addOneStscTableEntry(nChunks, mChunkSamples.size());
}
bufferChunk(timestampUs);
chunkTimestampUs = timestampUs;
@@ -1669,12 +1747,9 @@ status_t MPEG4Writer::Track::threadEntry() {
// Last chunk
if (mOwner->numTracks() == 1) {
- StscTableEntry stscEntry(1, mNumSamples, 1);
- mStscTableEntries.push_back(stscEntry);
+ addOneStscTableEntry(1, mNumSamples);
} else if (!mChunkSamples.empty()) {
- ++nChunks;
- StscTableEntry stscEntry(nChunks, mChunkSamples.size(), 1);
- mStscTableEntries.push_back(stscEntry);
+ addOneStscTableEntry(++nChunks, mChunkSamples.size());
bufferChunk(timestampUs);
}
@@ -1686,12 +1761,11 @@ status_t MPEG4Writer::Track::threadEntry() {
} else {
++sampleCount; // Count for the last sample
}
- SttsTableEntry sttsEntry(sampleCount, lastDurationUs);
- mSttsTableEntries.push_back(sttsEntry);
+ addOneSttsTableEntry(sampleCount, lastDurationUs);
mTrackDurationUs += lastDurationUs;
mReachedEOS = true;
- LOGI("Received total/0-length (%d/%d) buffers and encoded %d frames. Max write time: %lld us - %s",
- count, nZeroLengthFrames, mNumSamples, mMaxWriteTimeUs, mIsAudio? "audio": "video");
+ LOGI("Received total/0-length (%d/%d) buffers and encoded %d frames. - %s",
+ count, nZeroLengthFrames, mNumSamples, mIsAudio? "audio": "video");
logStatisticalData(mIsAudio);
if (err == ERROR_END_OF_STREAM) {
@@ -1855,14 +1929,9 @@ int64_t MPEG4Writer::getDriftTimeUs() {
void MPEG4Writer::Track::bufferChunk(int64_t timestampUs) {
LOGV("bufferChunk");
- int64_t startTimeUs = systemTime() / 1000;
Chunk chunk(this, timestampUs, mChunkSamples);
mOwner->bufferChunk(chunk);
mChunkSamples.clear();
- int64_t endTimeUs = systemTime() / 1000;
- if (mMaxWriteTimeUs < endTimeUs - startTimeUs) {
- mMaxWriteTimeUs = endTimeUs - startTimeUs;
- }
}
int64_t MPEG4Writer::Track::getDurationUs() const {
@@ -2215,7 +2284,7 @@ void MPEG4Writer::Track::writeTrackHeader(
mOwner->beginBox("stts");
mOwner->writeInt32(0); // version=0, flags=0
- mOwner->writeInt32(mSttsTableEntries.size());
+ mOwner->writeInt32(mNumSttsTableEntries);
int64_t prevTimestampUs = 0;
for (List<SttsTableEntry>::iterator it = mSttsTableEntries.begin();
it != mSttsTableEntries.end(); ++it) {
@@ -2235,7 +2304,7 @@ void MPEG4Writer::Track::writeTrackHeader(
if (!mIsAudio) {
mOwner->beginBox("stss");
mOwner->writeInt32(0); // version=0, flags=0
- mOwner->writeInt32(mStssTableEntries.size()); // number of sync frames
+ mOwner->writeInt32(mNumStssTableEntries); // number of sync frames
for (List<int32_t>::iterator it = mStssTableEntries.begin();
it != mStssTableEntries.end(); ++it) {
mOwner->writeInt32(*it);
@@ -2262,7 +2331,7 @@ void MPEG4Writer::Track::writeTrackHeader(
mOwner->beginBox("stsc");
mOwner->writeInt32(0); // version=0, flags=0
- mOwner->writeInt32(mStscTableEntries.size());
+ mOwner->writeInt32(mNumStscTableEntries);
for (List<StscTableEntry>::iterator it = mStscTableEntries.begin();
it != mStscTableEntries.end(); ++it) {
mOwner->writeInt32(it->firstChunk);
@@ -2272,7 +2341,7 @@ void MPEG4Writer::Track::writeTrackHeader(
mOwner->endBox(); // stsc
mOwner->beginBox(use32BitOffset? "stco": "co64");
mOwner->writeInt32(0); // version=0, flags=0
- mOwner->writeInt32(mChunkOffsets.size());
+ mOwner->writeInt32(mNumStcoTableEntries);
for (List<off_t>::iterator it = mChunkOffsets.begin();
it != mChunkOffsets.end(); ++it) {
if (use32BitOffset) {
generated by cgit v1.1 at 2025-03-09 00:48:40 +0000