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avcodec/dvdec: dont try to decode ac when theres no input

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fixes reading out of an empty bitstream

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-10-28 22:55:53 +01:00
parent f87a2e1272
commit f0b26bf0f5
1 changed files with 1 additions and 1 deletions
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2
libavcodec/dvdec.c
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@ -237,7 +237,7 @@ static int dv_decode_video_segment(AVCodecContext *avctx, void *arg)
flush_put_bits(&vs_pb);
for (mb_index = 0; mb_index < 5; mb_index++) {
for (j = 0; j < s->sys->bpm; j++) {
if (mb->pos < 64) {
if (mb->pos < 64 && get_bits_left(&gb) > 0) {
av_dlog(avctx, "start %d:%d\n", mb_index, j);
dv_decode_ac(&gb, mb, block);
}