Better file size estimate
When the recorded file becomes large, the metadata size can
no longer be ignored. This makes it possible to save the
recorded file when the storage becomes almost full at the
end of the recording session.
Change-Id: Ief038080f825c9946ce550949c03e914aec1e31a
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 @@
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 @@
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 @@
bool mIsRealTimeRecording;
int64_t mMaxTimeStampUs;
int64_t mEstimatedTrackSizeBytes;
- int64_t mMaxWriteTimeUs;
+ int64_t mMdatSizeBytes;
int32_t mTimeScale;
pthread_t mThread;
@@ -92,8 +93,11 @@
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 @@
};
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 @@
// 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() {
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 @@
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 @@
return OK;
}
+bool MPEG4Writer::use32BitFileOffset() const {
+ return mUse32BitOffset;
+}
+
status_t MPEG4Writer::pause() {
if (mFile == NULL) {
return OK;
@@ -739,7 +771,8 @@
it != mTracks.end(); ++it) {
nTotalBytesEstimate += (*it)->getEstimatedTrackSizeBytes();
}
- return (nTotalBytesEstimate >= mMaxFileSizeLimitBytes);
+
+ return (nTotalBytesEstimate + 1024 >= mMaxFileSizeLimitBytes);
}
bool MPEG4Writer::exceedsFileDurationLimit() {
@@ -819,6 +852,48 @@
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 @@
return OK;
}
+
status_t MPEG4Writer::Track::start(MetaData *params) {
if (!mDone && mPaused) {
mPaused = false;
@@ -1077,6 +1153,11 @@
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 @@
bool collectStats = collectStatisticalData();
mNumSamples = 0;
- mMaxWriteTimeUs = 0;
status_t err = OK;
MediaBuffer *buffer;
while (!mDone && (err = mSource->read(&buffer)) == OK) {
@@ -1505,7 +1585,9 @@
: 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 @@
(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 @@
}
if (isSync != 0) {
- mStssTableEntries.push_back(mNumSamples);
+ addOneStssTableEntry(mNumSamples);
}
if (mTrackingProgressStatus) {
@@ -1624,7 +1705,7 @@
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 @@
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 @@
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 @@
// 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 @@
} 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 @@
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 @@
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 @@
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 @@
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 @@
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) {
