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indeo4: check that num_mbs matches 

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-03-31 21:42:50 +02:00
parent 3768445be8
commit d3db8988d5
1 changed files with 5 additions and 0 deletions
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5
libavcodec/indeo4.c
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@ -490,6 +490,11 @@ static int decode_mb_info(IVI4DecContext *ctx, IVIBandDesc *band,
mv_scale = (ctx->planes[0].bands[0].mb_size >> 3) - (band->mb_size >> 3);
mv_x = mv_y = 0;
if (((tile->width + band->mb_size-1)/band->mb_size) * ((tile->height + band->mb_size-1)/band->mb_size) != tile->num_MBs) {
av_log(avctx, AV_LOG_ERROR, "num_MBs mismatch %d %d %d %d\n", tile->width, tile->height, band->mb_size, tile->num_MBs);
return -1;
}
for (y = tile->ypos; y < tile->ypos + tile->height; y += band->mb_size) {
mb_offset = offs;