motionpixels: Prevent calling init_vlc() with invalid parameters

Signed-off-by: Janne Grunau <janne-libav@jannau.net>
13 years ago · 1cd0a55163
parent 5f05cf4ea9
commit 1cd0a55163
1 changed files with 2 additions and 0 deletions
--- a/libavcodec/motionpixels.c
+++ b/libavcodec/motionpixels.c
@ -281,6 +281,8 @@ static int mp_decode_frame(AVCodecContext *avctx,
    if (sz == 0)
        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))
        goto end;
    mp_decode_frame_helper(mp, &gb);