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indeo5: check for unsupported luma block type

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Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-04-15 21:01:35 +02:00
parent fefc65675e
commit 88a97d660d
1 changed files with 5 additions and 0 deletions
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5
libavcodec/indeo5.c
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@ -167,6 +167,11 @@ static int decode_gop_header(IVI5DecContext *ctx, AVCodecContext *avctx)
blk_size = 8 >> get_bits1(&ctx->gb);
mb_size = blk_size << !mb_size;
if (p==0 && blk_size==4) {
av_log(avctx, AV_LOG_ERROR, "4x4 luma blocks are unsupported!\n");
return AVERROR_PATCHWELCOME;
}
blk_size_changed = mb_size != band->mb_size || blk_size != band->blk_size;
if (blk_size_changed) {
band->mb_size = mb_size;