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avcodec/012v: improve stride selection

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Fixes decoding some files
Fixes Ticket2126

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-07-13 16:18:06 +02:00
parent 786b0968dd
commit 4cdb42b428
1 changed files with 6 additions and 0 deletions
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6
libavcodec/012v.c
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@ -49,6 +49,12 @@ static int zero12v_decode_frame(AVCodecContext *avctx, void *data,
av_log(avctx, AV_LOG_ERROR, "Width 1 not supported.\n");
return AVERROR_INVALIDDATA;
}
if ( avctx->codec_tag == MKTAG('0', '1', '2', 'v')
&& avpkt->size % avctx->height == 0
&& avpkt->size / avctx->height * 3 >= width * 8)
stride = avpkt->size / avctx->height;
if (avpkt->size < avctx->height * stride) {
av_log(avctx, AV_LOG_ERROR, "Packet too small: %d instead of %d\n",
avpkt->size, avctx->height * stride);