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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
This commit is contained in:
Luca Barbato 2014-10-04 12:40:35 +02:00
parent 36f3aec363
commit 68211c70af
1 changed files with 1 additions and 1 deletions
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2
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
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 (i = 0; i < v->sprite_height>>!!plane; i++)
memset(f->data[plane] + i * f->linesize[plane],