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Motion compensation for luma always use halfpel precision.

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Originally committed as revision 6137 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Kostya Shishkov 2006-08-31 04:39:27 +00:00
parent e8a42081d2
commit 66ff2c1f52
1 changed files with 8 additions and 33 deletions
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41
libavcodec/vc1.c
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@ -867,22 +867,13 @@ static void vc1_mc_1mv(VC1Context *v, int dir)
srcY += s->linesize * 8;
dsp->put_vc1_mspel_pixels_tab[dxy](s->dest[0] + 8 * s->linesize , srcY , s->linesize, v->rnd);
dsp->put_vc1_mspel_pixels_tab[dxy](s->dest[0] + 8 * s->linesize + 8, srcY + 8, s->linesize, v->rnd);
} else if(!s->quarter_sample) { // hpel mc
mx >>= 1;
my >>= 1;
dxy = ((my & 1) << 1) | (mx & 1);
} else { // hpel mc - always used for luma
dxy = (my & 2) | ((mx & 2) >> 1);
if(!v->rnd)
dsp->put_pixels_tab[0][dxy](s->dest[0], srcY, s->linesize, 16);
else
dsp->put_no_rnd_pixels_tab[0][dxy](s->dest[0], srcY, s->linesize, 16);
} else {
dxy = ((my & 3) << 2) | (mx & 3);
if(!v->rnd)
dsp->put_qpel_pixels_tab[0][dxy](s->dest[0], srcY, s->linesize);
else
dsp->put_no_rnd_qpel_pixels_tab[0][dxy](s->dest[0], srcY, s->linesize);
}
if(s->flags & CODEC_FLAG_GRAY) return;
@ -957,22 +948,12 @@ static void vc1_mc_4mv_luma(VC1Context *v, int n)
if(s->mspel) {
dxy = ((my & 3) << 2) | (mx & 3);
dsp->put_vc1_mspel_pixels_tab[dxy](s->dest[0] + off, srcY, s->linesize, v->rnd);
} else if(!s->quarter_sample) { // hpel mc
mx >>= 1;
my >>= 1;
dxy = ((my & 1) << 1) | (mx & 1);
} else { // hpel mc - always used for luma
dxy = (my & 2) | ((mx & 2) >> 1);
if(!v->rnd)
dsp->put_pixels_tab[1][dxy](s->dest[0] + off, srcY, s->linesize, 8);
else
dsp->put_no_rnd_pixels_tab[1][dxy](s->dest[0] + off, srcY, s->linesize, 8);
} else {
dxy = ((my & 3) << 2) | (mx & 3);
if(!v->rnd)
dsp->put_qpel_pixels_tab[1][dxy](s->dest[0] + off, srcY, s->linesize);
else
dsp->put_no_rnd_qpel_pixels_tab[1][dxy](s->dest[0] + off, srcY, s->linesize);
}
}
@ -1765,17 +1746,11 @@ static void vc1_interp_mc(VC1Context *v)
uvmy = uvmy + ((uvmy<0)?(uvmy&1):-(uvmy&1));
}
if(!s->quarter_sample) { // hpel mc
mx >>= 1;
my >>= 1;
dxy = ((my & 1) << 1) | (mx & 1);
mx >>= 1;
my >>= 1;
dxy = ((my & 1) << 1) | (mx & 1);
dsp->avg_pixels_tab[0][dxy](s->dest[0], srcY, s->linesize, 16);
} else {
dxy = ((my & 3) << 2) | (mx & 3);
dsp->avg_qpel_pixels_tab[0][dxy](s->dest[0], srcY, s->linesize);
}
dsp->avg_pixels_tab[0][dxy](s->dest[0], srcY, s->linesize, 16);
if(s->flags & CODEC_FLAG_GRAY) return;
/* Chroma MC always uses qpel blilinear */