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motionpixels: Prevent calling init_vlc() with invalid parameters 

Signed-off-by: Janne Grunau <janne-libav@jannau.net>
This commit is contained in:
Laurent Aimar 2011-09-29 03:12:07 +00:00 committed by Janne Grunau
parent 5f05cf4ea9
commit 1cd0a55163
1 changed files with 2 additions and 0 deletions
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2
libavcodec/motionpixels.c
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@ -281,6 +281,8 @@ static int mp_decode_frame(AVCodecContext *avctx,
if (sz == 0) if (sz == 0)
goto end; goto end;
if (mp->max_codes_bits <= 0)
goto end;
if (init_vlc(&mp->vlc, mp->max_codes_bits, mp->codes_count, &mp->codes[0].size, sizeof(HuffCode), 1, &mp->codes[0].code, sizeof(HuffCode), 4, 0)) if (init_vlc(&mp->vlc, mp->max_codes_bits, mp->codes_count, &mp->codes[0].size, sizeof(HuffCode), 1, &mp->codes[0].code, sizeof(HuffCode), 4, 0))
goto end; goto end;
mp_decode_frame_helper(mp, &gb); mp_decode_frame_helper(mp, &gb);