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eacmv: ensure second-last frame is allocated before referencing it 

Fixes issue2513
Original patch by Daniel Kang, daniel.d.kang at gmail

Originally committed as revision 26279 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Daniel Kang 2011-01-09 08:28:40 +00:00 committed by Peter Ross
parent 5a477e5960
commit 062421e30d
1 changed files with 1 additions and 0 deletions
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libavcodec/eacmv.c
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@ -97,6 +97,7 @@ static void cmv_decode_inter(CmvContext * s, const uint8_t *buf, const uint8_t *
}else if(raw<buf_end) { /* inter using second-last frame as reference */
int xoffset = (*raw & 0xF) - 7;
int yoffset = ((*raw >> 4)) - 7;
if (s->last2_frame.data[0])
cmv_motcomp(s->frame.data[0], s->frame.linesize[0],
s->last2_frame.data[0], s->last2_frame.linesize[0],
x*4, y*4, xoffset, yoffset, s->avctx->width, s->avctx->height);