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avformat/av1: Initialize padding in ff_isom_write_av1c

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Otherwise, AV1 encodes with FFmpeg trigger use-of-uninitialized-value
warnings under MemorySanitizer, and the output buffer potentially
changes from run to run.

Signed-off-by: James Almer <jamrial@gmail.com>
(cherry picked from commit bb5efd1727eeecc9be8f1402810c7ab72344eed3)
This commit is contained in:
Jeremy Dorfman 2019-04-08 08:14:27 -04:00 committed by James Almer
parent ec82b3ecbb
commit 420fe39aff
1 changed files with 1 additions and 0 deletions
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libavformat/av1.c
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@ -372,6 +372,7 @@ int ff_isom_write_av1c(AVIOContext *pb, const uint8_t *buf, int size)
put_bits(&pbc, 1, seq_params.chroma_subsampling_x); put_bits(&pbc, 1, seq_params.chroma_subsampling_x);
put_bits(&pbc, 1, seq_params.chroma_subsampling_y); put_bits(&pbc, 1, seq_params.chroma_subsampling_y);
put_bits(&pbc, 2, seq_params.chroma_sample_position); put_bits(&pbc, 2, seq_params.chroma_sample_position);
put_bits(&pbc, 8, 0); // padding
flush_put_bits(&pbc); flush_put_bits(&pbc);
avio_write(pb, header, sizeof(header)); avio_write(pb, header, sizeof(header));