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mpeg12: check for available bits to avoid an infinite loop

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Signed-off-by: Jindrich Makovicka <makovick@gmail.com>
Signed-off-by: Diego Biurrun <diego@biurrun.de>
This commit is contained in:
Jindřich Makovička 2012-01-18 22:07:22 +01:00 committed by Diego Biurrun
parent e5903e2972
commit a85ce653fb
1 changed files with 1 additions and 1 deletions
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2
libavcodec/mpeg12.c
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@ -1658,7 +1658,7 @@ static int mpeg_decode_slice(MpegEncContext *s, int mb_y,
if (mb_y == 0 && s->codec_tag == AV_RL32("SLIF")) { if (mb_y == 0 && s->codec_tag == AV_RL32("SLIF")) {
skip_bits1(&s->gb); skip_bits1(&s->gb);
} else { } else {
for (;;) { while (get_bits_left(&s->gb) > 0) {
int code = get_vlc2(&s->gb, mbincr_vlc.table, MBINCR_VLC_BITS, 2); int code = get_vlc2(&s->gb, mbincr_vlc.table, MBINCR_VLC_BITS, 2);
if (code < 0) { if (code < 0) {
av_log(s->avctx, AV_LOG_ERROR, "first mb_incr damaged\n"); av_log(s->avctx, AV_LOG_ERROR, "first mb_incr damaged\n");