From e34350a376d4c28a6770e34fe4afb42a28fc00f0 Mon Sep 17 00:00:00 2001
From: Kostya Shishkov <kostya.shishkov@gmail.com>
Date: Sat, 2 Sep 2006 04:52:00 +0000
Subject: [PATCH] New function for chroma MC (will be used in VC-1)
Originally committed as revision 6150 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
libavcodec/dsputil.c | 25 +++++++++++++++++++++++++
libavcodec/dsputil.h | 2 ++
2 files changed, 27 insertions(+)
diff --git a/libavcodec/dsputil.c b/libavcodec/dsputil.c
index 89d2c15c491..44bad803d5d 100644
--- a/libavcodec/dsputil.c
+++ b/libavcodec/dsputil.c
@@ -1487,6 +1487,30 @@ H264_CHROMA_MC(avg_ , op_avg)
#undef op_avg
#undef op_put
+static void put_no_rnd_h264_chroma_mc8_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] = (A*src[0] + B*src[1] + C*src[stride+0] + D*src[stride+1] + 32 - 4) >> 6;
+ dst[1] = (A*src[1] + B*src[2] + C*src[stride+1] + D*src[stride+2] + 32 - 4) >> 6;
+ dst[2] = (A*src[2] + B*src[3] + C*src[stride+2] + D*src[stride+3] + 32 - 4) >> 6;
+ dst[3] = (A*src[3] + B*src[4] + C*src[stride+3] + D*src[stride+4] + 32 - 4) >> 6;
+ dst[4] = (A*src[4] + B*src[5] + C*src[stride+4] + D*src[stride+5] + 32 - 4) >> 6;
+ dst[5] = (A*src[5] + B*src[6] + C*src[stride+5] + D*src[stride+6] + 32 - 4) >> 6;
+ dst[6] = (A*src[6] + B*src[7] + C*src[stride+6] + D*src[stride+7] + 32 - 4) >> 6;
+ dst[7] = (A*src[7] + B*src[8] + C*src[stride+7] + D*src[stride+8] + 32 - 4) >> 6;
+ dst+= stride;
+ src+= stride;
+ }
+}
+
static inline void copy_block2(uint8_t *dst, uint8_t *src, int dstStride, int srcStride, int h)
{
int i;
@@ -4034,6 +4058,7 @@ void dsputil_init(DSPContext* c, AVCodecContext *avctx)
c->avg_h264_chroma_pixels_tab[0]= avg_h264_chroma_mc8_c;
c->avg_h264_chroma_pixels_tab[1]= avg_h264_chroma_mc4_c;
c->avg_h264_chroma_pixels_tab[2]= avg_h264_chroma_mc2_c;
+ c->put_no_rnd_h264_chroma_pixels_tab[0]= put_no_rnd_h264_chroma_mc8_c;
c->weight_h264_pixels_tab[0]= weight_h264_pixels16x16_c;
c->weight_h264_pixels_tab[1]= weight_h264_pixels16x8_c;
diff --git a/libavcodec/dsputil.h b/libavcodec/dsputil.h
index 3e47901dc00..204ee08895a 100644
--- a/libavcodec/dsputil.h
+++ b/libavcodec/dsputil.h
@@ -270,6 +270,8 @@ typedef struct DSPContext {
* h264 Chram MC
*/
h264_chroma_mc_func put_h264_chroma_pixels_tab[3];
+ /* This is really one func used in VC-1 decoding */
+ h264_chroma_mc_func put_no_rnd_h264_chroma_pixels_tab[3];
h264_chroma_mc_func avg_h264_chroma_pixels_tab[3];
qpel_mc_func put_h264_qpel_pixels_tab[4][16];
--
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