[FFmpeg-cvslog] h264: fix the check for invalid SPS:num_ref_frames.

[Laurent Aimar]

ffmpeg | branch: release/0.8 | Laurent Aimar <fenrir at videolan.org> | Sun Oct  2 16:06:38 2011 +0200| [bfd7238adbec83981ddd259e26e9e8f90d78f472] | committer: Michael Niedermayer

h264: fix the check for invalid SPS:num_ref_frames.

This patch set the limit to 16.

For information, thoses previous commits:
41f7e2d11d2dca23842ee89d530ca9fa15cec9d8
5cbb0e70a0a2ee99eb3cb09e837b9a1f7355b9bc
assumed it was either 30 or 32.

Signed-off-by: Michael Niedermayer <michaelni at gmx.at>
(cherry picked from commit bcf881a6858760ecbd9ff4352a38813dc4232dd6)

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=bfd7238adbec83981ddd259e26e9e8f90d78f472
---

 libavcodec/h264_ps.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/libavcodec/h264_ps.c b/libavcodec/h264_ps.c
index 61fb12c..4bb02e0 100644
--- a/libavcodec/h264_ps.c
+++ b/libavcodec/h264_ps.c
@@ -365,7 +365,7 @@ int ff_h264_decode_seq_parameter_set(H264Context *h){
     }
 
     sps->ref_frame_count= get_ue_golomb_31(&s->gb);
-    if(sps->ref_frame_count > MAX_PICTURE_COUNT-2 || sps->ref_frame_count >= 32U){
+    if(sps->ref_frame_count > MAX_PICTURE_COUNT-2 || sps->ref_frame_count > 16U){
         av_log(h->s.avctx, AV_LOG_ERROR, "too many reference frames\n");
         goto fail;
     }