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Merge "Depending on our preference to write 2-byte or 4-byte NALs, patch the codec specific data 'avcC' accordingly." into gingerbread

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This commit is contained in:
Andreas Huber
2010-09-23 14:16:48 -07:00
committed by Android (Google) Code Review
parent 045398e624 e7635933b6
commit 7b2ed5d7d6
1 changed files with 9 additions and 1 deletions
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10
media/libstagefright/MPEG4Writer.cpp
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@@ -2111,7 +2111,15 @@ void MPEG4Writer::Track::writeTrackHeader(
mOwner->endBox(); // d263
} else if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_AVC, mime)) {
CHECK(mCodecSpecificData);
CHECK(mCodecSpecificDataSize > 0);
CHECK(mCodecSpecificDataSize >= 5);
// 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