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wmadec: require block_align to be set.

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Avoids an infinite loop in the calling programs with decoder not
consuming any input and not returning output.

CC:libav-stable@libav.org
(cherry picked from commit ea1136baaf)

Signed-off-by: Reinhard Tartler <siretart@tauware.de>
(cherry picked from commit c1f479e8df)

Signed-off-by: Reinhard Tartler <siretart@tauware.de>
This commit is contained in:
Anton Khirnov 2013-03-06 09:58:00 +01:00 committed by Reinhard Tartler
parent 5025dbc577
commit f13f6f82c6
1 changed files with 5 additions and 0 deletions
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5
libavcodec/wmadec.c
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@ -85,6 +85,11 @@ static int wma_decode_init(AVCodecContext * avctx)
int i, flags2;
uint8_t *extradata;
if (!avctx->block_align) {
av_log(avctx, AV_LOG_ERROR, "block_align is not set\n");
return AVERROR(EINVAL);
}
s->avctx = avctx;
/* extract flag infos */