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vc1: Add avg_no_rnd_vc1_chroma_mc4_c()

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Needed for proper interlaced support.

Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
This commit is contained in:
Michael Niedermayer 2013-04-25 21:31:18 +02:00 committed by Luca Barbato
parent c798a6fedc
commit 6d98959c8a
1 changed files with 23 additions and 0 deletions
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23
libavcodec/vc1dsp.c
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@ -758,6 +758,28 @@ static void avg_no_rnd_vc1_chroma_mc8_c(uint8_t *dst /* align 8 */,
}
}
static void avg_no_rnd_vc1_chroma_mc4_c(uint8_t *dst /* align 8 */,
uint8_t *src /* align 1 */,
int stride, int h, int x, int y)
{
const int A = (8 - x) * (8 - y);
const int B = ( x) * (8 - y);
const int C = (8 - x) * ( y);
const int D = ( x) * ( y);
int i;
assert(x < 8 && y < 8 && x >= 0 && y >= 0);
for (i = 0; i < h; i++) {
dst[0] = avg2(dst[0], chroma_mc(0));
dst[1] = avg2(dst[1], chroma_mc(1));
dst[2] = avg2(dst[2], chroma_mc(2));
dst[3] = avg2(dst[3], chroma_mc(3));
dst += stride;
src += stride;
}
}
#if CONFIG_WMV3IMAGE_DECODER || CONFIG_VC1IMAGE_DECODER
static void sprite_h_c(uint8_t *dst, const uint8_t *src, int offset,
@ -902,6 +924,7 @@ av_cold void ff_vc1dsp_init(VC1DSPContext *dsp)
dsp->put_no_rnd_vc1_chroma_pixels_tab[0] = put_no_rnd_vc1_chroma_mc8_c;
dsp->avg_no_rnd_vc1_chroma_pixels_tab[0] = avg_no_rnd_vc1_chroma_mc8_c;
dsp->put_no_rnd_vc1_chroma_pixels_tab[1] = put_no_rnd_vc1_chroma_mc4_c;
dsp->avg_no_rnd_vc1_chroma_pixels_tab[1] = avg_no_rnd_vc1_chroma_mc4_c;
#if CONFIG_WMV3IMAGE_DECODER || CONFIG_VC1IMAGE_DECODER
dsp->sprite_h = sprite_h_c;