From e179fbc85037e49d91cb184810bd22078567fdce Mon Sep 17 00:00:00 2001
From: Kostya Shishkov <kostya.shishkov@gmail.com>
Date: Tue, 12 Sep 2006 04:35:11 +0000
Subject: Swap back and forward motion vectors to achieve correct picture
Originally committed as revision 6237 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
libavcodec/vc1.c | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)
(limited to 'libavcodec/vc1.c')
diff --git a/libavcodec/vc1.c b/libavcodec/vc1.c
index 8ce58afee7..c9c07cfcf1 100644
--- a/libavcodec/vc1.c
+++ b/libavcodec/vc1.c
@@ -2104,6 +2104,16 @@ static always_inline int scale_mv(int value, int bfrac, int inv, int qs)
*/
static inline void vc1_b_mc(VC1Context *v, int dmv_x[2], int dmv_y[2], int direct, int mode)
{
+ int t;
+
+ //XXX: more elegant solution is possible
+ t = v->s.mv[0][0][0];
+ v->s.mv[0][0][0] = v->s.mv[1][0][0];
+ v->s.mv[1][0][0] = t;
+ t = v->s.mv[0][0][1];
+ v->s.mv[0][0][1] = v->s.mv[1][0][1];
+ v->s.mv[1][0][1] = t;
+
if(direct) {
vc1_mc_1mv(v, 0);
vc1_interp_mc(v);
@@ -2115,7 +2125,7 @@ static inline void vc1_b_mc(VC1Context *v, int dmv_x[2], int dmv_y[2], int direc
return;
}
- vc1_mc_1mv(v, (mode == BMV_TYPE_FORWARD));
+ vc1_mc_1mv(v, (mode == BMV_TYPE_BACKWARD));
}
static inline void vc1_pred_b_mv(VC1Context *v, int dmv_x[2], int dmv_y[2], int direct, int mvtype)
--
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