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dxa: Make sure the reference frame exists 

Reported-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-stable@libav.org
This commit is contained in:
Luca Barbato 2013-08-14 16:51:53 +02:00
parent c59967fa7c
commit 5ef7c84a93
1 changed files with 4 additions and 0 deletions
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4
libavcodec/dxa.c
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@ -255,6 +255,10 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPac
case 3:
case 4:
case 5:
if (!tmpptr) {
av_log(avctx, AV_LOG_ERROR, "Missing reference frame.\n");
return AVERROR_INVALIDDATA;
}
frame->key_frame = !(compr & 1);
frame->pict_type = (compr & 1) ? AV_PICTURE_TYPE_P : AV_PICTURE_TYPE_I;
for(j = 0; j < avctx->height; j++){