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Improve chroma MC: correct case for FASTUVMC=1, use slower but correct /2, and always use halfpel MC.

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Not quite there yet but a bit better picture on some files.

Originally committed as revision 5652 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Kostya Shishkov 2006-07-07 05:02:01 +00:00
parent 50af2fd30d
commit 913e93d5f2
1 changed files with 22 additions and 17 deletions
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39
libavcodec/vc1.c
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@ -928,11 +928,6 @@ static void vc1_mc_1mv(VC1Context *v)
srcU = s->last_picture.data[1];
srcV = s->last_picture.data[2];
if(v->fastuvmc) { // XXX: 8.3.5.4.5 specifies something different
uvmx = (uvmx + 1) & ~1;
uvmy = (uvmy + 1) & ~1;
}
src_x = s->mb_x * 16 + (mx >> 2);
src_y = s->mb_y * 16 + (my >> 2);
uvsrc_x = s->mb_x * 8 + (uvmx >> 2);
@ -983,19 +978,25 @@ static void vc1_mc_1mv(VC1Context *v)
}
}
if(v->fastuvmc) {
uvmx = uvmx + ((uvmx<0)?(uvmx&1):-(uvmx&1));
uvmy = uvmy + ((uvmy<0)?(uvmy&1):-(uvmy&1));
}
if(!s->quarter_sample) { // hpel mc
mx >>= 1;
my >>= 1;
dxy = ((my & 1) << 1) | (mx & 1);
uvdxy = 0;
dsp->put_no_rnd_pixels_tab[0][dxy](s->dest[0], srcY, s->linesize, 16);
} else {
dxy = ((my & 3) << 2) | (mx & 3);
uvdxy = ((uvmy & 1) << 1) | (uvmx & 1);
dsp->put_no_rnd_qpel_pixels_tab[0][dxy](s->dest[0], srcY, s->linesize);
}
uvmx >>= 1;
uvmy >>= 1;
uvdxy = ((uvmy & 1) << 1) | (uvmx & 1);
dsp->put_no_rnd_pixels_tab[1][uvdxy](s->dest[1], srcU, s->uvlinesize, 8);
dsp->put_no_rnd_pixels_tab[1][uvdxy](s->dest[2], srcV, s->uvlinesize, 8);
// dsp->put_mspel_pixels_tab[uvdxy](s->dest[1], srcU, s->uvlinesize);
@ -1050,11 +1051,11 @@ static void vc1_mc_4mv_luma(VC1Context *v, int n)
static inline int median4(int a, int b, int c, int d)
{
if(a < b) {
if(c < d) return (FFMIN(b, d) + FFMAX(a, c)) >> 1;
else return (FFMIN(b, c) + FFMAX(a, d)) >> 1;
if(c < d) return (FFMIN(b, d) + FFMAX(a, c)) / 2;
else return (FFMIN(b, c) + FFMAX(a, d)) / 2;
} else {
if(c < d) return (FFMIN(a, d) + FFMAX(b, c)) >> 1;
else return (FFMIN(a, c) + FFMAX(b, d)) >> 1;
if(c < d) return (FFMIN(a, d) + FFMAX(b, c)) / 2;
else return (FFMIN(a, c) + FFMAX(b, d)) / 2;
}
}
@ -1107,8 +1108,8 @@ static void vc1_mc_4mv_chroma(VC1Context *v)
int t1 = 0, t2 = 0;
for(i=0; i<3;i++) if(!intra[i]) {t1 = i; break;}
for(i= t1+1; i<4; i++)if(!intra[i]) {t2 = i; break;}
tx = (mvx[t1] + mvx[t2]) >> 1;
ty = (mvy[t1] + mvy[t2]) >> 1;
tx = (mvx[t1] + mvx[t2]) / 2;
ty = (mvy[t1] + mvy[t2]) / 2;
} else
return; //no need to do MC for inter blocks
@ -1132,10 +1133,14 @@ static void vc1_mc_4mv_chroma(VC1Context *v)
srcV = s->edge_emu_buffer + 16;
}
if(!s->quarter_sample) // hpel mc
uvdxy = 0;
else
uvdxy = ((uvmy & 1) << 1) | (uvmx & 1);
if(v->fastuvmc) {
uvmx = uvmx + ((uvmx<0)?(uvmx&1):-(uvmx&1));
uvmy = uvmy + ((uvmy<0)?(uvmy&1):-(uvmy&1));
}
uvmx >>= 1;
uvmy >>= 1;
uvdxy = ((uvmy & 1) << 1) | (uvmx & 1);
dsp->put_no_rnd_pixels_tab[1][uvdxy](s->dest[1], srcU, s->uvlinesize, 8);
dsp->put_no_rnd_pixels_tab[1][uvdxy](s->dest[2], srcV, s->uvlinesize, 8);
}