[FFmpeg-cvslog] vc1: Always reset numref when parsing a new frame header.

[Michael Niedermayer]

ffmpeg | branch: release/0.10 | Michael Niedermayer <michaelni at gmx.at> | Sun Jan 19 15:28:25 2014 +0000| [30c8a5e4f6c096eabb82c45177b945ebc85144fb] | committer: Reinhard Tartler

vc1: Always reset numref when parsing a new frame header.

Fixes an issue where the B-frame coding mode switches from interlaced
fields to interlaced frames, causing incorrect decisions in the motion
compensation code and resulting in visual artifacts.

CC: libav-stable at libav.org
Signed-off-by: Tim Walker <tdskywalker at gmail.com>
(cherry picked from commit dd2d0039b6405dc724e4fef0d5b8f49530eea3aa)
Signed-off-by: Reinhard Tartler <siretart at tauware.de>
(cherry picked from commit 3cc8d9bc1ffc6c0888960fb009f12fa3047bb663)
Signed-off-by: Reinhard Tartler <siretart at tauware.de>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=30c8a5e4f6c096eabb82c45177b945ebc85144fb
---

 libavcodec/vc1.c |    1 +
 1 file changed, 1 insertion(+)

diff --git a/libavcodec/vc1.c b/libavcodec/vc1.c
index 6135ebd..68e0d0d 100644
--- a/libavcodec/vc1.c
+++ b/libavcodec/vc1.c
@@ -822,6 +822,7 @@ int vc1_parse_frame_header_adv(VC1Context *v, GetBitContext* gb)
     int mbmodetab, imvtab, icbptab, twomvbptab, fourmvbptab; /* useful only for debugging */
     int scale, shift, i; /* for initializing LUT for intensity compensation */
 
+    v->numref          = 0;
     v->p_frame_skipped = 0;
     if (v->second_field) {
         v->s.pict_type = (v->fptype & 1) ? AV_PICTURE_TYPE_P : AV_PICTURE_TYPE_I;