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100l FastUVMC rounding was incorrect. 

This should also improve quality on WMV9Drifting.asf

Originally committed as revision 7190 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Kostya Shishkov 2006-12-01 07:24:56 +00:00
parent f7f8af46f7
commit 98ba1cfaf7
1 changed files with 6 additions and 6 deletions
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12
libavcodec/vc1.c
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@ -879,8 +879,8 @@ static void vc1_mc_1mv(VC1Context *v, int dir)
}
if(v->fastuvmc) {
uvmx = uvmx + ((uvmx<0)?(uvmx&1):-(uvmx&1));
uvmy = uvmy + ((uvmy<0)?(uvmy&1):-(uvmy&1));
uvmx = uvmx + ((uvmx<0)?-(uvmx&1):(uvmx&1));
uvmy = uvmy + ((uvmy<0)?-(uvmy&1):(uvmy&1));
}
if(s->mspel) {
@ -1103,8 +1103,8 @@ static void vc1_mc_4mv_chroma(VC1Context *v)
}
if(v->fastuvmc) {
uvmx = uvmx + ((uvmx<0)?(uvmx&1):-(uvmx&1));
uvmy = uvmy + ((uvmy<0)?(uvmy&1):-(uvmy&1));
uvmx = uvmx + ((uvmx<0)?-(uvmx&1):(uvmx&1));
uvmy = uvmy + ((uvmy<0)?-(uvmy&1):(uvmy&1));
}
/* Chroma MC always uses qpel bilinear */
@ -2124,8 +2124,8 @@ static void vc1_interp_mc(VC1Context *v)
}
if(v->fastuvmc) {
uvmx = uvmx + ((uvmx<0)?(uvmx&1):-(uvmx&1));
uvmy = uvmy + ((uvmy<0)?(uvmy&1):-(uvmy&1));
uvmx = uvmx + ((uvmx<0)?-(uvmx&1):(uvmx&1));
uvmy = uvmy + ((uvmy<0)?-(uvmy&1):(uvmy&1));
}
mx >>= 1;