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avcodec/motionpixels: Be more strict when parsing Huffman trees

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This ensures that the number of leafs in the Huffman tree equals the
number it is supposed to be and therefore ensures that the VLC tree is
complete, allowing us to remove checks.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
This commit is contained in:
Andreas Rheinhardt 2020-10-29 10:41:01 +01:00
parent e246ea2535
commit 3d95b1a828
1 changed files with 1 additions and 1 deletions
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2
libavcodec/motionpixels.c
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@ -133,7 +133,7 @@ static int mp_get_code(MotionPixelsContext *mp, GetBitContext *gb, int size, int
if (mp_get_code(mp, gb, size, code + 1) < 0)
return AVERROR_INVALIDDATA;
}
if (mp->current_codes_count >= MAX_HUFF_CODES) {
if (mp->current_codes_count >= mp->codes_count) {
av_log(mp->avctx, AV_LOG_ERROR, "too many codes\n");
return AVERROR_INVALIDDATA;
}