[FFmpeg-cvslog] vc1dec: use get_bits_long and limit the read bits to 32
Andreas Cadhalpun
git at videolan.org
Sun Jul 19 18:28:04 CEST 2015
ffmpeg | branch: release/2.7 | Andreas Cadhalpun <Andreas.Cadhalpun at googlemail.com> | Thu Jun 25 22:47:38 2015 +0200| [2e1226a695dd2faada939e0bdc3ee166b05c3579] | committer: Andreas Cadhalpun
vc1dec: use get_bits_long and limit the read bits to 32
get_bits should not be used with more than 25 bits.
Reviewed-by: Michael Niedermayer <michaelni at gmx.at>
Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun at googlemail.com>
(cherry picked from commit 1f1e0a2971b2a01f275bb5088c2e36166514be64)
Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun at googlemail.com>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=2e1226a695dd2faada939e0bdc3ee166b05c3579
---
libavcodec/vc1dec.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavcodec/vc1dec.c b/libavcodec/vc1dec.c
index 3fa39a5..d7a0cef 100644
--- a/libavcodec/vc1dec.c
+++ b/libavcodec/vc1dec.c
@@ -469,7 +469,7 @@ static av_cold int vc1_decode_init(AVCodecContext *avctx)
count = avctx->extradata_size*8 - get_bits_count(&gb);
if (count > 0) {
av_log(avctx, AV_LOG_INFO, "Extra data: %i bits left, value: %X\n",
- count, get_bits(&gb, count));
+ count, get_bits_long(&gb, FFMIN(count, 32)));
} else if (count < 0) {
av_log(avctx, AV_LOG_INFO, "Read %i bits in overflow\n", -count);
}
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