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Merge "Expose average video frame rate via MPEG4Extractor" into honeycomb

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This commit is contained in:
James Dong
2011-01-19 10:29:04 -08:00
committed by Android (Google) Code Review
parent b90bd293c2 cbb488d678
commit 8e7d626385
1 changed files with 16 additions and 1 deletions
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17
media/libstagefright/MPEG4Extractor.cpp
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@@ -1040,8 +1040,23 @@ status_t MPEG4Extractor::parseChunk(off64_t *offset, int depth) {
// have a 4 byte header (0x00 0x00 0x00 0x01) after conversion,
// and thus will grow by 2 bytes per fragment.
mLastTrack->meta->setInt32(kKeyMaxInputSize, max_size + 10 * 2);
*offset += chunk_size;
// Calculate average frame rate.
const char *mime;
CHECK(mLastTrack->meta->findCString(kKeyMIMEType, &mime));
if (!strncasecmp("video/", mime, 6)) {
size_t nSamples = mLastTrack->sampleTable->countSamples();
int64_t durationUs;
if (mLastTrack->meta->findInt64(kKeyDuration, &durationUs)) {
if (durationUs > 0) {
int32_t frameRate = (nSamples * 1000000LL +
(durationUs >> 1)) / durationUs;
mLastTrack->meta->setInt32(kKeyFrameRate, frameRate);
}
}
}
break;
}