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Ensure that we don't read from invalid memory with B-frame qpel

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Originally committed as revision 18839 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
David Conrad 2009-05-15 07:49:59 +00:00
parent e1316b19ea
commit ebcf3b742b
1 changed files with 2 additions and 2 deletions
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4
libavcodec/vc1.c
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@ -1818,8 +1818,8 @@ static void vc1_interp_mc(VC1Context *v)
}
if(v->rangeredfrm
|| (unsigned)src_x > s->h_edge_pos - (mx&3) - 16
|| (unsigned)src_y > s->v_edge_pos - (my&3) - 16){
|| (unsigned)src_x > s->h_edge_pos - (mx&3) - 16 - s->mspel*3
|| (unsigned)src_y > s->v_edge_pos - (my&3) - 16 - s->mspel*3){
uint8_t *uvbuf= s->edge_emu_buffer + 19 * s->linesize;
srcY -= s->mspel * (1 + s->linesize);