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vc1: Do not assume seek happens after decoding

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If a seek is requested before the decoding start there is no
current picture.

CC: libav-stable@libav.org
(cherry picked from commit 3e348ecfc6ab1830e43288a9e12e8f0a000afbcb)
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
This commit is contained in:
Luca Barbato
2014-10-04 12:40:35 +02:00
parent 864c0c50eb
commit 3ea49fc508
1 changed files with 1 additions and 1 deletions
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libavcodec/vc1dec.c
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@@ -5503,7 +5503,7 @@ static void vc1_sprite_flush(AVCodecContext *avctx)
Since we can't enforce it, clear to black the missing sprite. This is Since we can't enforce it, clear to black the missing sprite. This is
wrong but it looks better than doing nothing. */ wrong but it looks better than doing nothing. */
if (f->data[0]) if (f && f->data[0])
for (plane = 0; plane < (s->flags&CODEC_FLAG_GRAY ? 1 : 3); plane++) for (plane = 0; plane < (s->flags&CODEC_FLAG_GRAY ? 1 : 3); plane++)
for (i = 0; i < v->sprite_height>>!!plane; i++) for (i = 0; i < v->sprite_height>>!!plane; i++)
memset(f->data[plane] + i * f->linesize[plane], memset(f->data[plane] + i * f->linesize[plane],