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| author | Dai, Jianhui J <jianhui.j.dai-at-intel.com@ffmpeg.org> | 2024-03-19 06:05:17 +0000 |
|---|---|---|
| committer | Ronald S. Bultje <rsbultje@gmail.com> | 2024-03-26 09:05:04 -0400 |
| commit | 61afe4d98ce62d9dfc6f0548e18730ba2f621cc2 (patch) | |
| tree | c23251f5d33ba55c272533a882f3aca48a849b41 | |
| parent | 63dea3c1e10a0692bbdadd0916335bbf9dc8147d (diff) | |
| download | ffmpeg-61afe4d98ce62d9dfc6f0548e18730ba2f621cc2.tar.gz | |
avcodec/cbs_vp8: Improve the bitstream position check
The VP8 compressed header may not be byte-aligned due to boolean
coding. Round up byte count for accurate data positioning.
Signed-off-by: Jianhui Dai <jianhui.j.dai@intel.com>
Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>
| -rw-r--r-- | libavcodec/cbs_vp8.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/libavcodec/cbs_vp8.c b/libavcodec/cbs_vp8.c index afa2e4f980..1f80f34faf 100644 --- a/libavcodec/cbs_vp8.c +++ b/libavcodec/cbs_vp8.c @@ -339,7 +339,9 @@ static int cbs_vp8_read_unit(CodedBitstreamContext *ctx, return err; pos = get_bits_count(&gbc); - pos /= 8; + // Position may not be byte-aligned after compressed header; Round up byte + // count for accurate data positioning. + pos = (pos + 7) / 8; av_assert0(pos <= unit->data_size); frame->data_ref = av_buffer_ref(unit->data_ref); |