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| author | Michael Niedermayer <michaelni@gmx.at> | 2013-01-29 19:22:33 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2013-03-20 22:02:28 +0100 |
| commit | 864a7e73b9604f3db1dd58f4580a1c8f05219ea4 (patch) | |
| tree | c93cd698ed4a02ea2528880a3f291feabb7d788d /libavcodec | |
| parent | 562aa82d2a22cba39caede1d7b1243fdb6311ce5 (diff) | |
| download | ffmpeg-864a7e73b9604f3db1dd58f4580a1c8f05219ea4.tar.gz | |
huffyuvdec: Skip len==0 cases
Fixes vlc decoding for hypothetical files that would contain such cases.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit 0dfc01c2bbf4b71bb56201bc4a393321e15d1b31)
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit 5ff41ffeb4cb9ea6df49757dc859619dc3d3ab4f)
Conflicts:
libavcodec/huffyuv.c
Diffstat (limited to 'libavcodec')
| -rw-r--r-- | libavcodec/huffyuv.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/libavcodec/huffyuv.c b/libavcodec/huffyuv.c index 80203eccb1..0afd2ab5f4 100644 --- a/libavcodec/huffyuv.c +++ b/libavcodec/huffyuv.c @@ -314,11 +314,11 @@ static void generate_joint_tables(HYuvContext *s){ for(i=y=0; y<256; y++){ int len0 = s->len[0][y]; int limit = VLC_BITS - len0; - if(limit <= 0) + if(limit <= 0 || !len0) continue; for(u=0; u<256; u++){ int len1 = s->len[p][u]; - if(len1 > limit) + if (len1 > limit || !len1) continue; av_assert0(i < (1 << VLC_BITS)); len[i] = len0 + len1; @@ -342,17 +342,17 @@ static void generate_joint_tables(HYuvContext *s){ for(i=0, g=-16; g<16; g++){ int len0 = s->len[p0][g&255]; int limit0 = VLC_BITS - len0; - if(limit0 < 2) + if (limit0 < 2 || !len0) continue; for(b=-16; b<16; b++){ int len1 = s->len[p1][b&255]; int limit1 = limit0 - len1; - if(limit1 < 1) + if (limit1 < 1 || !len1) continue; code = (s->bits[p0][g&255] << len1) + s->bits[p1][b&255]; for(r=-16; r<16; r++){ int len2 = s->len[2][r&255]; - if(len2 > limit1) + if (len2 > limit1 || !len2) continue; av_assert0(i < (1 << VLC_BITS)); len[i] = len0 + len1 + len2; |