Move the functions in h264pred.c into a new file h264pred_template.c.

Preparatory patch for high bit depth h264 decoding support.

Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>

1 files changed, 912 insertions, 0 deletions

diff --git a/libavcodec/h264pred_template.c b/libavcodec/h264pred_template.c
new file mode 100644
index 0000000000..7856315a03
--- /dev/null
+++ b/libavcodec/h264pred_template.c
@@ -0,0 +1,912 @@
+/*
+ * H.26L/H.264/AVC/JVT/14496-10/... encoder/decoder
+ * Copyright (c) 2003-2011 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * This file is part of Libav.
+ *
+ * Libav is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * Libav is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * H.264 / AVC / MPEG4 part10 prediction functions.
+ * @author Michael Niedermayer <michaelni@gmx.at>
+ */
+
+#include "mathops.h"
+#include "dsputil.h"
+
+static void pred4x4_vertical_c(uint8_t *src, const uint8_t *topright, int stride){
+    const uint32_t a= ((uint32_t*)(src-stride))[0];
+    ((uint32_t*)(src+0*stride))[0]= a;
+    ((uint32_t*)(src+1*stride))[0]= a;
+    ((uint32_t*)(src+2*stride))[0]= a;
+    ((uint32_t*)(src+3*stride))[0]= a;
+}
+
+static void pred4x4_horizontal_c(uint8_t *src, const uint8_t *topright, int stride){
+    ((uint32_t*)(src+0*stride))[0]= src[-1+0*stride]*0x01010101;
+    ((uint32_t*)(src+1*stride))[0]= src[-1+1*stride]*0x01010101;
+    ((uint32_t*)(src+2*stride))[0]= src[-1+2*stride]*0x01010101;
+    ((uint32_t*)(src+3*stride))[0]= src[-1+3*stride]*0x01010101;
+}
+
+static void pred4x4_dc_c(uint8_t *src, const uint8_t *topright, int stride){
+    const int dc= (  src[-stride] + src[1-stride] + src[2-stride] + src[3-stride]
+                   + src[-1+0*stride] + src[-1+1*stride] + src[-1+2*stride] + src[-1+3*stride] + 4) >>3;
+
+    ((uint32_t*)(src+0*stride))[0]=
+    ((uint32_t*)(src+1*stride))[0]=
+    ((uint32_t*)(src+2*stride))[0]=
+    ((uint32_t*)(src+3*stride))[0]= dc* 0x01010101;
+}
+
+static void pred4x4_left_dc_c(uint8_t *src, const uint8_t *topright, int stride){
+    const int dc= (  src[-1+0*stride] + src[-1+1*stride] + src[-1+2*stride] + src[-1+3*stride] + 2) >>2;
+
+    ((uint32_t*)(src+0*stride))[0]=
+    ((uint32_t*)(src+1*stride))[0]=
+    ((uint32_t*)(src+2*stride))[0]=
+    ((uint32_t*)(src+3*stride))[0]= dc* 0x01010101;
+}
+
+static void pred4x4_top_dc_c(uint8_t *src, const uint8_t *topright, int stride){
+    const int dc= (  src[-stride] + src[1-stride] + src[2-stride] + src[3-stride] + 2) >>2;
+
+    ((uint32_t*)(src+0*stride))[0]=
+    ((uint32_t*)(src+1*stride))[0]=
+    ((uint32_t*)(src+2*stride))[0]=
+    ((uint32_t*)(src+3*stride))[0]= dc* 0x01010101;
+}
+
+static void pred4x4_128_dc_c(uint8_t *src, const uint8_t *topright, int stride){
+    ((uint32_t*)(src+0*stride))[0]=
+    ((uint32_t*)(src+1*stride))[0]=
+    ((uint32_t*)(src+2*stride))[0]=
+    ((uint32_t*)(src+3*stride))[0]= 128U*0x01010101U;
+}
+
+static void pred4x4_127_dc_c(uint8_t *src, const uint8_t *topright, int stride){
+    ((uint32_t*)(src+0*stride))[0]=
+    ((uint32_t*)(src+1*stride))[0]=
+    ((uint32_t*)(src+2*stride))[0]=
+    ((uint32_t*)(src+3*stride))[0]= 127U*0x01010101U;
+}
+
+static void pred4x4_129_dc_c(uint8_t *src, const uint8_t *topright, int stride){
+    ((uint32_t*)(src+0*stride))[0]=
+    ((uint32_t*)(src+1*stride))[0]=
+    ((uint32_t*)(src+2*stride))[0]=
+    ((uint32_t*)(src+3*stride))[0]= 129U*0x01010101U;
+}
+
+
+#define LOAD_TOP_RIGHT_EDGE\
+    const int av_unused t4= topright[0];\
+    const int av_unused t5= topright[1];\
+    const int av_unused t6= topright[2];\
+    const int av_unused t7= topright[3];\
+
+#define LOAD_DOWN_LEFT_EDGE\
+    const int av_unused l4= src[-1+4*stride];\
+    const int av_unused l5= src[-1+5*stride];\
+    const int av_unused l6= src[-1+6*stride];\
+    const int av_unused l7= src[-1+7*stride];\
+
+#define LOAD_LEFT_EDGE\
+    const int av_unused l0= src[-1+0*stride];\
+    const int av_unused l1= src[-1+1*stride];\
+    const int av_unused l2= src[-1+2*stride];\
+    const int av_unused l3= src[-1+3*stride];\
+
+#define LOAD_TOP_EDGE\
+    const int av_unused t0= src[ 0-1*stride];\
+    const int av_unused t1= src[ 1-1*stride];\
+    const int av_unused t2= src[ 2-1*stride];\
+    const int av_unused t3= src[ 3-1*stride];\
+
+static void pred4x4_down_right_c(uint8_t *src, const uint8_t *topright, int stride){
+    const int lt= src[-1-1*stride];
+    LOAD_TOP_EDGE
+    LOAD_LEFT_EDGE
+
+    src[0+3*stride]=(l3 + 2*l2 + l1 + 2)>>2;
+    src[0+2*stride]=
+    src[1+3*stride]=(l2 + 2*l1 + l0 + 2)>>2;
+    src[0+1*stride]=
+    src[1+2*stride]=
+    src[2+3*stride]=(l1 + 2*l0 + lt + 2)>>2;
+    src[0+0*stride]=
+    src[1+1*stride]=
+    src[2+2*stride]=
+    src[3+3*stride]=(l0 + 2*lt + t0 + 2)>>2;
+    src[1+0*stride]=
+    src[2+1*stride]=
+    src[3+2*stride]=(lt + 2*t0 + t1 + 2)>>2;
+    src[2+0*stride]=
+    src[3+1*stride]=(t0 + 2*t1 + t2 + 2)>>2;
+    src[3+0*stride]=(t1 + 2*t2 + t3 + 2)>>2;
+}
+
+static void pred4x4_down_left_c(uint8_t *src, const uint8_t *topright, int stride){
+    LOAD_TOP_EDGE
+    LOAD_TOP_RIGHT_EDGE
+//    LOAD_LEFT_EDGE
+
+    src[0+0*stride]=(t0 + t2 + 2*t1 + 2)>>2;
+    src[1+0*stride]=
+    src[0+1*stride]=(t1 + t3 + 2*t2 + 2)>>2;
+    src[2+0*stride]=
+    src[1+1*stride]=
+    src[0+2*stride]=(t2 + t4 + 2*t3 + 2)>>2;
+    src[3+0*stride]=
+    src[2+1*stride]=
+    src[1+2*stride]=
+    src[0+3*stride]=(t3 + t5 + 2*t4 + 2)>>2;
+    src[3+1*stride]=
+    src[2+2*stride]=
+    src[1+3*stride]=(t4 + t6 + 2*t5 + 2)>>2;
+    src[3+2*stride]=
+    src[2+3*stride]=(t5 + t7 + 2*t6 + 2)>>2;
+    src[3+3*stride]=(t6 + 3*t7 + 2)>>2;
+}
+
+static void pred4x4_vertical_right_c(uint8_t *src, const uint8_t *topright, int stride){
+    const int lt= src[-1-1*stride];
+    LOAD_TOP_EDGE
+    LOAD_LEFT_EDGE
+
+    src[0+0*stride]=
+    src[1+2*stride]=(lt + t0 + 1)>>1;
+    src[1+0*stride]=
+    src[2+2*stride]=(t0 + t1 + 1)>>1;
+    src[2+0*stride]=
+    src[3+2*stride]=(t1 + t2 + 1)>>1;
+    src[3+0*stride]=(t2 + t3 + 1)>>1;
+    src[0+1*stride]=
+    src[1+3*stride]=(l0 + 2*lt + t0 + 2)>>2;
+    src[1+1*stride]=
+    src[2+3*stride]=(lt + 2*t0 + t1 + 2)>>2;
+    src[2+1*stride]=
+    src[3+3*stride]=(t0 + 2*t1 + t2 + 2)>>2;
+    src[3+1*stride]=(t1 + 2*t2 + t3 + 2)>>2;
+    src[0+2*stride]=(lt + 2*l0 + l1 + 2)>>2;
+    src[0+3*stride]=(l0 + 2*l1 + l2 + 2)>>2;
+}
+
+static void pred4x4_vertical_left_c(uint8_t *src, const uint8_t *topright, int stride){
+    LOAD_TOP_EDGE
+    LOAD_TOP_RIGHT_EDGE
+
+    src[0+0*stride]=(t0 + t1 + 1)>>1;
+    src[1+0*stride]=
+    src[0+2*stride]=(t1 + t2 + 1)>>1;
+    src[2+0*stride]=
+    src[1+2*stride]=(t2 + t3 + 1)>>1;
+    src[3+0*stride]=
+    src[2+2*stride]=(t3 + t4+ 1)>>1;
+    src[3+2*stride]=(t4 + t5+ 1)>>1;
+    src[0+1*stride]=(t0 + 2*t1 + t2 + 2)>>2;
+    src[1+1*stride]=
+    src[0+3*stride]=(t1 + 2*t2 + t3 + 2)>>2;
+    src[2+1*stride]=
+    src[1+3*stride]=(t2 + 2*t3 + t4 + 2)>>2;
+    src[3+1*stride]=
+    src[2+3*stride]=(t3 + 2*t4 + t5 + 2)>>2;
+    src[3+3*stride]=(t4 + 2*t5 + t6 + 2)>>2;
+}
+
+static void pred4x4_horizontal_up_c(uint8_t *src, const uint8_t *topright, int stride){
+    LOAD_LEFT_EDGE
+
+    src[0+0*stride]=(l0 + l1 + 1)>>1;
+    src[1+0*stride]=(l0 + 2*l1 + l2 + 2)>>2;
+    src[2+0*stride]=
+    src[0+1*stride]=(l1 + l2 + 1)>>1;
+    src[3+0*stride]=
+    src[1+1*stride]=(l1 + 2*l2 + l3 + 2)>>2;
+    src[2+1*stride]=
+    src[0+2*stride]=(l2 + l3 + 1)>>1;
+    src[3+1*stride]=
+    src[1+2*stride]=(l2 + 2*l3 + l3 + 2)>>2;
+    src[3+2*stride]=
+    src[1+3*stride]=
+    src[0+3*stride]=
+    src[2+2*stride]=
+    src[2+3*stride]=
+    src[3+3*stride]=l3;
+}
+
+static void pred4x4_horizontal_down_c(uint8_t *src, const uint8_t *topright, int stride){
+    const int lt= src[-1-1*stride];
+    LOAD_TOP_EDGE
+    LOAD_LEFT_EDGE
+
+    src[0+0*stride]=
+    src[2+1*stride]=(lt + l0 + 1)>>1;
+    src[1+0*stride]=
+    src[3+1*stride]=(l0 + 2*lt + t0 + 2)>>2;
+    src[2+0*stride]=(lt + 2*t0 + t1 + 2)>>2;
+    src[3+0*stride]=(t0 + 2*t1 + t2 + 2)>>2;
+    src[0+1*stride]=
+    src[2+2*stride]=(l0 + l1 + 1)>>1;
+    src[1+1*stride]=
+    src[3+2*stride]=(lt + 2*l0 + l1 + 2)>>2;
+    src[0+2*stride]=
+    src[2+3*stride]=(l1 + l2+ 1)>>1;
+    src[1+2*stride]=
+    src[3+3*stride]=(l0 + 2*l1 + l2 + 2)>>2;
+    src[0+3*stride]=(l2 + l3 + 1)>>1;
+    src[1+3*stride]=(l1 + 2*l2 + l3 + 2)>>2;
+}
+
+static void pred16x16_vertical_c(uint8_t *src, int stride){
+    int i;
+    const uint32_t a= ((uint32_t*)(src-stride))[0];
+    const uint32_t b= ((uint32_t*)(src-stride))[1];
+    const uint32_t c= ((uint32_t*)(src-stride))[2];
+    const uint32_t d= ((uint32_t*)(src-stride))[3];
+
+    for(i=0; i<16; i++){
+        ((uint32_t*)(src+i*stride))[0]= a;
+        ((uint32_t*)(src+i*stride))[1]= b;
+        ((uint32_t*)(src+i*stride))[2]= c;
+        ((uint32_t*)(src+i*stride))[3]= d;
+    }
+}
+
+static void pred16x16_horizontal_c(uint8_t *src, int stride){
+    int i;
+
+    for(i=0; i<16; i++){
+        ((uint32_t*)(src+i*stride))[0]=
+        ((uint32_t*)(src+i*stride))[1]=
+        ((uint32_t*)(src+i*stride))[2]=
+        ((uint32_t*)(src+i*stride))[3]= src[-1+i*stride]*0x01010101;
+    }
+}
+
+static void pred16x16_dc_c(uint8_t *src, int stride){
+    int i, dc=0;
+
+    for(i=0;i<16; i++){
+        dc+= src[-1+i*stride];
+    }
+
+    for(i=0;i<16; i++){
+        dc+= src[i-stride];
+    }
+
+    dc= 0x01010101*((dc + 16)>>5);
+
+    for(i=0; i<16; i++){
+        ((uint32_t*)(src+i*stride))[0]=
+        ((uint32_t*)(src+i*stride))[1]=
+        ((uint32_t*)(src+i*stride))[2]=
+        ((uint32_t*)(src+i*stride))[3]= dc;
+    }
+}
+
+static void pred16x16_left_dc_c(uint8_t *src, int stride){
+    int i, dc=0;
+
+    for(i=0;i<16; i++){
+        dc+= src[-1+i*stride];
+    }
+
+    dc= 0x01010101*((dc + 8)>>4);
+
+    for(i=0; i<16; i++){
+        ((uint32_t*)(src+i*stride))[0]=
+        ((uint32_t*)(src+i*stride))[1]=
+        ((uint32_t*)(src+i*stride))[2]=
+        ((uint32_t*)(src+i*stride))[3]= dc;
+    }
+}
+
+static void pred16x16_top_dc_c(uint8_t *src, int stride){
+    int i, dc=0;
+
+    for(i=0;i<16; i++){
+        dc+= src[i-stride];
+    }
+    dc= 0x01010101*((dc + 8)>>4);
+
+    for(i=0; i<16; i++){
+        ((uint32_t*)(src+i*stride))[0]=
+        ((uint32_t*)(src+i*stride))[1]=
+        ((uint32_t*)(src+i*stride))[2]=
+        ((uint32_t*)(src+i*stride))[3]= dc;
+    }
+}
+
+static void pred16x16_128_dc_c(uint8_t *src, int stride){
+    int i;
+
+    for(i=0; i<16; i++){
+        ((uint32_t*)(src+i*stride))[0]=
+        ((uint32_t*)(src+i*stride))[1]=
+        ((uint32_t*)(src+i*stride))[2]=
+        ((uint32_t*)(src+i*stride))[3]= 0x01010101U*128U;
+    }
+}
+
+static void pred16x16_127_dc_c(uint8_t *src, int stride){
+    int i;
+
+    for(i=0; i<16; i++){
+        ((uint32_t*)(src+i*stride))[0]=
+        ((uint32_t*)(src+i*stride))[1]=
+        ((uint32_t*)(src+i*stride))[2]=
+        ((uint32_t*)(src+i*stride))[3]= 0x01010101U*127U;
+    }
+}
+
+static void pred16x16_129_dc_c(uint8_t *src, int stride){
+    int i;
+
+    for(i=0; i<16; i++){
+        ((uint32_t*)(src+i*stride))[0]=
+        ((uint32_t*)(src+i*stride))[1]=
+        ((uint32_t*)(src+i*stride))[2]=
+        ((uint32_t*)(src+i*stride))[3]= 0x01010101U*129U;
+    }
+}
+
+static inline void pred16x16_plane_compat_c(uint8_t *src, int stride, const int svq3, const int rv40){
+  int i, j, k;
+  int a;
+  uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
+  const uint8_t * const src0 = src+7-stride;
+  const uint8_t *src1 = src+8*stride-1;
+  const uint8_t *src2 = src1-2*stride;      // == src+6*stride-1;
+  int H = src0[1] - src0[-1];
+  int V = src1[0] - src2[ 0];
+  for(k=2; k<=8; ++k) {
+    src1 += stride; src2 -= stride;
+    H += k*(src0[k] - src0[-k]);
+    V += k*(src1[0] - src2[ 0]);
+  }
+  if(svq3){
+    H = ( 5*(H/4) ) / 16;
+    V = ( 5*(V/4) ) / 16;
+
+    /* required for 100% accuracy */
+    i = H; H = V; V = i;
+  }else if(rv40){
+    H = ( H + (H>>2) ) >> 4;
+    V = ( V + (V>>2) ) >> 4;
+  }else{
+    H = ( 5*H+32 ) >> 6;
+    V = ( 5*V+32 ) >> 6;
+  }
+
+  a = 16*(src1[0] + src2[16] + 1) - 7*(V+H);
+  for(j=16; j>0; --j) {
+    int b = a;
+    a += V;
+    for(i=-16; i<0; i+=4) {
+      src[16+i] = cm[ (b    ) >> 5 ];
+      src[17+i] = cm[ (b+  H) >> 5 ];
+      src[18+i] = cm[ (b+2*H) >> 5 ];
+      src[19+i] = cm[ (b+3*H) >> 5 ];
+      b += 4*H;
+    }
+    src += stride;
+  }
+}
+
+static void pred16x16_plane_c(uint8_t *src, int stride){
+    pred16x16_plane_compat_c(src, stride, 0, 0);
+}
+
+static void pred8x8_vertical_c(uint8_t *src, int stride){
+    int i;
+    const uint32_t a= ((uint32_t*)(src-stride))[0];
+    const uint32_t b= ((uint32_t*)(src-stride))[1];
+
+    for(i=0; i<8; i++){
+        ((uint32_t*)(src+i*stride))[0]= a;
+        ((uint32_t*)(src+i*stride))[1]= b;
+    }
+}
+
+static void pred8x8_horizontal_c(uint8_t *src, int stride){
+    int i;
+
+    for(i=0; i<8; i++){
+        ((uint32_t*)(src+i*stride))[0]=
+        ((uint32_t*)(src+i*stride))[1]= src[-1+i*stride]*0x01010101;
+    }
+}
+
+static void pred8x8_128_dc_c(uint8_t *src, int stride){
+    int i;
+
+    for(i=0; i<8; i++){
+        ((uint32_t*)(src+i*stride))[0]=
+        ((uint32_t*)(src+i*stride))[1]= 0x01010101U*128U;
+    }
+}
+
+static void pred8x8_127_dc_c(uint8_t *src, int stride){
+    int i;
+
+    for(i=0; i<8; i++){
+        ((uint32_t*)(src+i*stride))[0]=
+        ((uint32_t*)(src+i*stride))[1]= 0x01010101U*127U;
+    }
+}
+static void pred8x8_129_dc_c(uint8_t *src, int stride){
+    int i;
+
+    for(i=0; i<8; i++){
+        ((uint32_t*)(src+i*stride))[0]=
+        ((uint32_t*)(src+i*stride))[1]= 0x01010101U*129U;
+    }
+}
+
+static void pred8x8_left_dc_c(uint8_t *src, int stride){
+    int i;
+    int dc0, dc2;
+
+    dc0=dc2=0;
+    for(i=0;i<4; i++){
+        dc0+= src[-1+i*stride];
+        dc2+= src[-1+(i+4)*stride];
+    }
+    dc0= 0x01010101*((dc0 + 2)>>2);
+    dc2= 0x01010101*((dc2 + 2)>>2);
+
+    for(i=0; i<4; i++){
+        ((uint32_t*)(src+i*stride))[0]=
+        ((uint32_t*)(src+i*stride))[1]= dc0;
+    }
+    for(i=4; i<8; i++){
+        ((uint32_t*)(src+i*stride))[0]=
+        ((uint32_t*)(src+i*stride))[1]= dc2;
+    }
+}
+
+static void pred8x8_top_dc_c(uint8_t *src, int stride){
+    int i;
+    int dc0, dc1;
+
+    dc0=dc1=0;
+    for(i=0;i<4; i++){
+        dc0+= src[i-stride];
+        dc1+= src[4+i-stride];
+    }
+    dc0= 0x01010101*((dc0 + 2)>>2);
+    dc1= 0x01010101*((dc1 + 2)>>2);
+
+    for(i=0; i<4; i++){
+        ((uint32_t*)(src+i*stride))[0]= dc0;
+        ((uint32_t*)(src+i*stride))[1]= dc1;
+    }
+    for(i=4; i<8; i++){
+        ((uint32_t*)(src+i*stride))[0]= dc0;
+        ((uint32_t*)(src+i*stride))[1]= dc1;
+    }
+}
+
+static void pred8x8_dc_c(uint8_t *src, int stride){
+    int i;
+    int dc0, dc1, dc2, dc3;
+
+    dc0=dc1=dc2=0;
+    for(i=0;i<4; i++){
+        dc0+= src[-1+i*stride] + src[i-stride];
+        dc1+= src[4+i-stride];
+        dc2+= src[-1+(i+4)*stride];
+    }
+    dc3= 0x01010101*((dc1 + dc2 + 4)>>3);
+    dc0= 0x01010101*((dc0 + 4)>>3);
+    dc1= 0x01010101*((dc1 + 2)>>2);
+    dc2= 0x01010101*((dc2 + 2)>>2);
+
+    for(i=0; i<4; i++){
+        ((uint32_t*)(src+i*stride))[0]= dc0;
+        ((uint32_t*)(src+i*stride))[1]= dc1;
+    }
+    for(i=4; i<8; i++){
+        ((uint32_t*)(src+i*stride))[0]= dc2;
+        ((uint32_t*)(src+i*stride))[1]= dc3;
+    }
+}
+
+//the following 4 function should not be optimized!
+static void pred8x8_mad_cow_dc_l0t(uint8_t *src, int stride){
+    pred8x8_top_dc_c(src, stride);
+    pred4x4_dc_c(src, NULL, stride);
+}
+
+static void pred8x8_mad_cow_dc_0lt(uint8_t *src, int stride){
+    pred8x8_dc_c(src, stride);
+    pred4x4_top_dc_c(src, NULL, stride);
+}
+
+static void pred8x8_mad_cow_dc_l00(uint8_t *src, int stride){
+    pred8x8_left_dc_c(src, stride);
+    pred4x4_128_dc_c(src + 4*stride    , NULL, stride);
+    pred4x4_128_dc_c(src + 4*stride + 4, NULL, stride);
+}
+
+static void pred8x8_mad_cow_dc_0l0(uint8_t *src, int stride){
+    pred8x8_left_dc_c(src, stride);
+    pred4x4_128_dc_c(src    , NULL, stride);
+    pred4x4_128_dc_c(src + 4, NULL, stride);
+}
+
+static void pred8x8_plane_c(uint8_t *src, int stride){
+  int j, k;
+  int a;
+  uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
+  const uint8_t * const src0 = src+3-stride;
+  const uint8_t *src1 = src+4*stride-1;
+  const uint8_t *src2 = src1-2*stride;      // == src+2*stride-1;
+  int H = src0[1] - src0[-1];
+  int V = src1[0] - src2[ 0];
+  for(k=2; k<=4; ++k) {
+    src1 += stride; src2 -= stride;
+    H += k*(src0[k] - src0[-k]);
+    V += k*(src1[0] - src2[ 0]);
+  }
+  H = ( 17*H+16 ) >> 5;
+  V = ( 17*V+16 ) >> 5;
+
+  a = 16*(src1[0] + src2[8]+1) - 3*(V+H);
+  for(j=8; j>0; --j) {
+    int b = a;
+    a += V;
+    src[0] = cm[ (b    ) >> 5 ];
+    src[1] = cm[ (b+  H) >> 5 ];
+    src[2] = cm[ (b+2*H) >> 5 ];
+    src[3] = cm[ (b+3*H) >> 5 ];
+    src[4] = cm[ (b+4*H) >> 5 ];
+    src[5] = cm[ (b+5*H) >> 5 ];
+    src[6] = cm[ (b+6*H) >> 5 ];
+    src[7] = cm[ (b+7*H) >> 5 ];
+    src += stride;
+  }
+}
+
+#define SRC(x,y) src[(x)+(y)*stride]
+#define PL(y) \
+    const int l##y = (SRC(-1,y-1) + 2*SRC(-1,y) + SRC(-1,y+1) + 2) >> 2;
+#define PREDICT_8x8_LOAD_LEFT \
+    const int l0 = ((has_topleft ? SRC(-1,-1) : SRC(-1,0)) \
+                     + 2*SRC(-1,0) + SRC(-1,1) + 2) >> 2; \
+    PL(1) PL(2) PL(3) PL(4) PL(5) PL(6) \
+    const int l7 av_unused = (SRC(-1,6) + 3*SRC(-1,7) + 2) >> 2
+
+#define PT(x) \
+    const int t##x = (SRC(x-1,-1) + 2*SRC(x,-1) + SRC(x+1,-1) + 2) >> 2;
+#define PREDICT_8x8_LOAD_TOP \
+    const int t0 = ((has_topleft ? SRC(-1,-1) : SRC(0,-1)) \
+                     + 2*SRC(0,-1) + SRC(1,-1) + 2) >> 2; \
+    PT(1) PT(2) PT(3) PT(4) PT(5) PT(6) \
+    const int t7 av_unused = ((has_topright ? SRC(8,-1) : SRC(7,-1)) \
+                     + 2*SRC(7,-1) + SRC(6,-1) + 2) >> 2
+
+#define PTR(x) \
+    t##x = (SRC(x-1,-1) + 2*SRC(x,-1) + SRC(x+1,-1) + 2) >> 2;
+#define PREDICT_8x8_LOAD_TOPRIGHT \
+    int t8, t9, t10, t11, t12, t13, t14, t15; \
+    if(has_topright) { \
+        PTR(8) PTR(9) PTR(10) PTR(11) PTR(12) PTR(13) PTR(14) \
+        t15 = (SRC(14,-1) + 3*SRC(15,-1) + 2) >> 2; \
+    } else t8=t9=t10=t11=t12=t13=t14=t15= SRC(7,-1);
+
+#define PREDICT_8x8_LOAD_TOPLEFT \
+    const int lt = (SRC(-1,0) + 2*SRC(-1,-1) + SRC(0,-1) + 2) >> 2
+
+#define PREDICT_8x8_DC(v) \
+    int y; \
+    for( y = 0; y < 8; y++ ) { \
+        ((uint32_t*)src)[0] = \
+        ((uint32_t*)src)[1] = v; \
+        src += stride; \
+    }
+
+static void pred8x8l_128_dc_c(uint8_t *src, int has_topleft, int has_topright, int stride)
+{
+    PREDICT_8x8_DC(0x80808080);
+}
+static void pred8x8l_left_dc_c(uint8_t *src, int has_topleft, int has_topright, int stride)
+{
+    PREDICT_8x8_LOAD_LEFT;
+    const uint32_t dc = ((l0+l1+l2+l3+l4+l5+l6+l7+4) >> 3) * 0x01010101;
+    PREDICT_8x8_DC(dc);
+}
+static void pred8x8l_top_dc_c(uint8_t *src, int has_topleft, int has_topright, int stride)
+{
+    PREDICT_8x8_LOAD_TOP;
+    const uint32_t dc = ((t0+t1+t2+t3+t4+t5+t6+t7+4) >> 3) * 0x01010101;
+    PREDICT_8x8_DC(dc);
+}
+static void pred8x8l_dc_c(uint8_t *src, int has_topleft, int has_topright, int stride)
+{
+    PREDICT_8x8_LOAD_LEFT;
+    PREDICT_8x8_LOAD_TOP;
+    const uint32_t dc = ((l0+l1+l2+l3+l4+l5+l6+l7
+                         +t0+t1+t2+t3+t4+t5+t6+t7+8) >> 4) * 0x01010101;
+    PREDICT_8x8_DC(dc);
+}
+static void pred8x8l_horizontal_c(uint8_t *src, int has_topleft, int has_topright, int stride)
+{
+    PREDICT_8x8_LOAD_LEFT;
+#define ROW(y) ((uint32_t*)(src+y*stride))[0] =\
+               ((uint32_t*)(src+y*stride))[1] = 0x01010101 * l##y
+    ROW(0); ROW(1); ROW(2); ROW(3); ROW(4); ROW(5); ROW(6); ROW(7);
+#undef ROW
+}
+static void pred8x8l_vertical_c(uint8_t *src, int has_topleft, int has_topright, int stride)
+{
+    int y;
+    PREDICT_8x8_LOAD_TOP;
+    src[0] = t0;
+    src[1] = t1;
+    src[2] = t2;
+    src[3] = t3;
+    src[4] = t4;
+    src[5] = t5;
+    src[6] = t6;
+    src[7] = t7;
+    for( y = 1; y < 8; y++ )
+        *(uint64_t*)(src+y*stride) = *(uint64_t*)src;
+}
+static void pred8x8l_down_left_c(uint8_t *src, int has_topleft, int has_topright, int stride)
+{
+    PREDICT_8x8_LOAD_TOP;
+    PREDICT_8x8_LOAD_TOPRIGHT;
+    SRC(0,0)= (t0 + 2*t1 + t2 + 2) >> 2;
+    SRC(0,1)=SRC(1,0)= (t1 + 2*t2 + t3 + 2) >> 2;
+    SRC(0,2)=SRC(1,1)=SRC(2,0)= (t2 + 2*t3 + t4 + 2) >> 2;
+    SRC(0,3)=SRC(1,2)=SRC(2,1)=SRC(3,0)= (t3 + 2*t4 + t5 + 2) >> 2;
+    SRC(0,4)=SRC(1,3)=SRC(2,2)=SRC(3,1)=SRC(4,0)= (t4 + 2*t5 + t6 + 2) >> 2;
+    SRC(0,5)=SRC(1,4)=SRC(2,3)=SRC(3,2)=SRC(4,1)=SRC(5,0)= (t5 + 2*t6 + t7 + 2) >> 2;
+    SRC(0,6)=SRC(1,5)=SRC(2,4)=SRC(3,3)=SRC(4,2)=SRC(5,1)=SRC(6,0)= (t6 + 2*t7 + t8 + 2) >> 2;
+    SRC(0,7)=SRC(1,6)=SRC(2,5)=SRC(3,4)=SRC(4,3)=SRC(5,2)=SRC(6,1)=SRC(7,0)= (t7 + 2*t8 + t9 + 2) >> 2;
+    SRC(1,7)=SRC(2,6)=SRC(3,5)=SRC(4,4)=SRC(5,3)=SRC(6,2)=SRC(7,1)= (t8 + 2*t9 + t10 + 2) >> 2;
+    SRC(2,7)=SRC(3,6)=SRC(4,5)=SRC(5,4)=SRC(6,3)=SRC(7,2)= (t9 + 2*t10 + t11 + 2) >> 2;
+    SRC(3,7)=SRC(4,6)=SRC(5,5)=SRC(6,4)=SRC(7,3)= (t10 + 2*t11 + t12 + 2) >> 2;
+    SRC(4,7)=SRC(5,6)=SRC(6,5)=SRC(7,4)= (t11 + 2*t12 + t13 + 2) >> 2;
+    SRC(5,7)=SRC(6,6)=SRC(7,5)= (t12 + 2*t13 + t14 + 2) >> 2;
+    SRC(6,7)=SRC(7,6)= (t13 + 2*t14 + t15 + 2) >> 2;
+    SRC(7,7)= (t14 + 3*t15 + 2) >> 2;
+}
+static void pred8x8l_down_right_c(uint8_t *src, int has_topleft, int has_topright, int stride)
+{
+    PREDICT_8x8_LOAD_TOP;
+    PREDICT_8x8_LOAD_LEFT;
+    PREDICT_8x8_LOAD_TOPLEFT;
+    SRC(0,7)= (l7 + 2*l6 + l5 + 2) >> 2;
+    SRC(0,6)=SRC(1,7)= (l6 + 2*l5 + l4 + 2) >> 2;
+    SRC(0,5)=SRC(1,6)=SRC(2,7)= (l5 + 2*l4 + l3 + 2) >> 2;
+    SRC(0,4)=SRC(1,5)=SRC(2,6)=SRC(3,7)= (l4 + 2*l3 + l2 + 2) >> 2;
+    SRC(0,3)=SRC(1,4)=SRC(2,5)=SRC(3,6)=SRC(4,7)= (l3 + 2*l2 + l1 + 2) >> 2;
+    SRC(0,2)=SRC(1,3)=SRC(2,4)=SRC(3,5)=SRC(4,6)=SRC(5,7)= (l2 + 2*l1 + l0 + 2) >> 2;
+    SRC(0,1)=SRC(1,2)=SRC(2,3)=SRC(3,4)=SRC(4,5)=SRC(5,6)=SRC(6,7)= (l1 + 2*l0 + lt + 2) >> 2;
+    SRC(0,0)=SRC(1,1)=SRC(2,2)=SRC(3,3)=SRC(4,4)=SRC(5,5)=SRC(6,6)=SRC(7,7)= (l0 + 2*lt + t0 + 2) >> 2;
+    SRC(1,0)=SRC(2,1)=SRC(3,2)=SRC(4,3)=SRC(5,4)=SRC(6,5)=SRC(7,6)= (lt + 2*t0 + t1 + 2) >> 2;
+    SRC(2,0)=SRC(3,1)=SRC(4,2)=SRC(5,3)=SRC(6,4)=SRC(7,5)= (t0 + 2*t1 + t2 + 2) >> 2;
+    SRC(3,0)=SRC(4,1)=SRC(5,2)=SRC(6,3)=SRC(7,4)= (t1 + 2*t2 + t3 + 2) >> 2;
+    SRC(4,0)=SRC(5,1)=SRC(6,2)=SRC(7,3)= (t2 + 2*t3 + t4 + 2) >> 2;
+    SRC(5,0)=SRC(6,1)=SRC(7,2)= (t3 + 2*t4 + t5 + 2) >> 2;
+    SRC(6,0)=SRC(7,1)= (t4 + 2*t5 + t6 + 2) >> 2;
+    SRC(7,0)= (t5 + 2*t6 + t7 + 2) >> 2;
+
+}
+static void pred8x8l_vertical_right_c(uint8_t *src, int has_topleft, int has_topright, int stride)
+{
+    PREDICT_8x8_LOAD_TOP;
+    PREDICT_8x8_LOAD_LEFT;
+    PREDICT_8x8_LOAD_TOPLEFT;
+    SRC(0,6)= (l5 + 2*l4 + l3 + 2) >> 2;
+    SRC(0,7)= (l6 + 2*l5 + l4 + 2) >> 2;
+    SRC(0,4)=SRC(1,6)= (l3 + 2*l2 + l1 + 2) >> 2;
+    SRC(0,5)=SRC(1,7)= (l4 + 2*l3 + l2 + 2) >> 2;
+    SRC(0,2)=SRC(1,4)=SRC(2,6)= (l1 + 2*l0 + lt + 2) >> 2;
+    SRC(0,3)=SRC(1,5)=SRC(2,7)= (l2 + 2*l1 + l0 + 2) >> 2;
+    SRC(0,1)=SRC(1,3)=SRC(2,5)=SRC(3,7)= (l0 + 2*lt + t0 + 2) >> 2;
+    SRC(0,0)=SRC(1,2)=SRC(2,4)=SRC(3,6)= (lt + t0 + 1) >> 1;
+    SRC(1,1)=SRC(2,3)=SRC(3,5)=SRC(4,7)= (lt + 2*t0 + t1 + 2) >> 2;
+    SRC(1,0)=SRC(2,2)=SRC(3,4)=SRC(4,6)= (t0 + t1 + 1) >> 1;
+    SRC(2,1)=SRC(3,3)=SRC(4,5)=SRC(5,7)= (t0 + 2*t1 + t2 + 2) >> 2;
+    SRC(2,0)=SRC(3,2)=SRC(4,4)=SRC(5,6)= (t1 + t2 + 1) >> 1;
+    SRC(3,1)=SRC(4,3)=SRC(5,5)=SRC(6,7)= (t1 + 2*t2 + t3 + 2) >> 2;
+    SRC(3,0)=SRC(4,2)=SRC(5,4)=SRC(6,6)= (t2 + t3 + 1) >> 1;
+    SRC(4,1)=SRC(5,3)=SRC(6,5)=SRC(7,7)= (t2 + 2*t3 + t4 + 2) >> 2;
+    SRC(4,0)=SRC(5,2)=SRC(6,4)=SRC(7,6)= (t3 + t4 + 1) >> 1;
+    SRC(5,1)=SRC(6,3)=SRC(7,5)= (t3 + 2*t4 + t5 + 2) >> 2;
+    SRC(5,0)=SRC(6,2)=SRC(7,4)= (t4 + t5 + 1) >> 1;
+    SRC(6,1)=SRC(7,3)= (t4 + 2*t5 + t6 + 2) >> 2;
+    SRC(6,0)=SRC(7,2)= (t5 + t6 + 1) >> 1;
+    SRC(7,1)= (t5 + 2*t6 + t7 + 2) >> 2;
+    SRC(7,0)= (t6 + t7 + 1) >> 1;
+}
+static void pred8x8l_horizontal_down_c(uint8_t *src, int has_topleft, int has_topright, int stride)
+{
+    PREDICT_8x8_LOAD_TOP;
+    PREDICT_8x8_LOAD_LEFT;
+    PREDICT_8x8_LOAD_TOPLEFT;
+    SRC(0,7)= (l6 + l7 + 1) >> 1;
+    SRC(1,7)= (l5 + 2*l6 + l7 + 2) >> 2;
+    SRC(0,6)=SRC(2,7)= (l5 + l6 + 1) >> 1;
+    SRC(1,6)=SRC(3,7)= (l4 + 2*l5 + l6 + 2) >> 2;
+    SRC(0,5)=SRC(2,6)=SRC(4,7)= (l4 + l5 + 1) >> 1;
+    SRC(1,5)=SRC(3,6)=SRC(5,7)= (l3 + 2*l4 + l5 + 2) >> 2;
+    SRC(0,4)=SRC(2,5)=SRC(4,6)=SRC(6,7)= (l3 + l4 + 1) >> 1;
+    SRC(1,4)=SRC(3,5)=SRC(5,6)=SRC(7,7)= (l2 + 2*l3 + l4 + 2) >> 2;
+    SRC(0,3)=SRC(2,4)=SRC(4,5)=SRC(6,6)= (l2 + l3 + 1) >> 1;
+    SRC(1,3)=SRC(3,4)=SRC(5,5)=SRC(7,6)= (l1 + 2*l2 + l3 + 2) >> 2;
+    SRC(0,2)=SRC(2,3)=SRC(4,4)=SRC(6,5)= (l1 + l2 + 1) >> 1;
+    SRC(1,2)=SRC(3,3)=SRC(5,4)=SRC(7,5)= (l0 + 2*l1 + l2 + 2) >> 2;
+    SRC(0,1)=SRC(2,2)=SRC(4,3)=SRC(6,4)= (l0 + l1 + 1) >> 1;
+    SRC(1,1)=SRC(3,2)=SRC(5,3)=SRC(7,4)= (lt + 2*l0 + l1 + 2) >> 2;
+    SRC(0,0)=SRC(2,1)=SRC(4,2)=SRC(6,3)= (lt + l0 + 1) >> 1;
+    SRC(1,0)=SRC(3,1)=SRC(5,2)=SRC(7,3)= (l0 + 2*lt + t0 + 2) >> 2;
+    SRC(2,0)=SRC(4,1)=SRC(6,2)= (t1 + 2*t0 + lt + 2) >> 2;
+    SRC(3,0)=SRC(5,1)=SRC(7,2)= (t2 + 2*t1 + t0 + 2) >> 2;
+    SRC(4,0)=SRC(6,1)= (t3 + 2*t2 + t1 + 2) >> 2;
+    SRC(5,0)=SRC(7,1)= (t4 + 2*t3 + t2 + 2) >> 2;
+    SRC(6,0)= (t5 + 2*t4 + t3 + 2) >> 2;
+    SRC(7,0)= (t6 + 2*t5 + t4 + 2) >> 2;
+}
+static void pred8x8l_vertical_left_c(uint8_t *src, int has_topleft, int has_topright, int stride)
+{
+    PREDICT_8x8_LOAD_TOP;
+    PREDICT_8x8_LOAD_TOPRIGHT;
+    SRC(0,0)= (t0 + t1 + 1) >> 1;
+    SRC(0,1)= (t0 + 2*t1 + t2 + 2) >> 2;
+    SRC(0,2)=SRC(1,0)= (t1 + t2 + 1) >> 1;
+    SRC(0,3)=SRC(1,1)= (t1 + 2*t2 + t3 + 2) >> 2;
+    SRC(0,4)=SRC(1,2)=SRC(2,0)= (t2 + t3 + 1) >> 1;
+    SRC(0,5)=SRC(1,3)=SRC(2,1)= (t2 + 2*t3 + t4 + 2) >> 2;
+    SRC(0,6)=SRC(1,4)=SRC(2,2)=SRC(3,0)= (t3 + t4 + 1) >> 1;
+    SRC(0,7)=SRC(1,5)=SRC(2,3)=SRC(3,1)= (t3 + 2*t4 + t5 + 2) >> 2;
+    SRC(1,6)=SRC(2,4)=SRC(3,2)=SRC(4,0)= (t4 + t5 + 1) >> 1;
+    SRC(1,7)=SRC(2,5)=SRC(3,3)=SRC(4,1)= (t4 + 2*t5 + t6 + 2) >> 2;
+    SRC(2,6)=SRC(3,4)=SRC(4,2)=SRC(5,0)= (t5 + t6 + 1) >> 1;
+    SRC(2,7)=SRC(3,5)=SRC(4,3)=SRC(5,1)= (t5 + 2*t6 + t7 + 2) >> 2;
+    SRC(3,6)=SRC(4,4)=SRC(5,2)=SRC(6,0)= (t6 + t7 + 1) >> 1;
+    SRC(3,7)=SRC(4,5)=SRC(5,3)=SRC(6,1)= (t6 + 2*t7 + t8 + 2) >> 2;
+    SRC(4,6)=SRC(5,4)=SRC(6,2)=SRC(7,0)= (t7 + t8 + 1) >> 1;
+    SRC(4,7)=SRC(5,5)=SRC(6,3)=SRC(7,1)= (t7 + 2*t8 + t9 + 2) >> 2;
+    SRC(5,6)=SRC(6,4)=SRC(7,2)= (t8 + t9 + 1) >> 1;
+    SRC(5,7)=SRC(6,5)=SRC(7,3)= (t8 + 2*t9 + t10 + 2) >> 2;
+    SRC(6,6)=SRC(7,4)= (t9 + t10 + 1) >> 1;
+    SRC(6,7)=SRC(7,5)= (t9 + 2*t10 + t11 + 2) >> 2;
+    SRC(7,6)= (t10 + t11 + 1) >> 1;
+    SRC(7,7)= (t10 + 2*t11 + t12 + 2) >> 2;
+}
+static void pred8x8l_horizontal_up_c(uint8_t *src, int has_topleft, int has_topright, int stride)
+{
+    PREDICT_8x8_LOAD_LEFT;
+    SRC(0,0)= (l0 + l1 + 1) >> 1;
+    SRC(1,0)= (l0 + 2*l1 + l2 + 2) >> 2;
+    SRC(0,1)=SRC(2,0)= (l1 + l2 + 1) >> 1;
+    SRC(1,1)=SRC(3,0)= (l1 + 2*l2 + l3 + 2) >> 2;
+    SRC(0,2)=SRC(2,1)=SRC(4,0)= (l2 + l3 + 1) >> 1;
+    SRC(1,2)=SRC(3,1)=SRC(5,0)= (l2 + 2*l3 + l4 + 2) >> 2;
+    SRC(0,3)=SRC(2,2)=SRC(4,1)=SRC(6,0)= (l3 + l4 + 1) >> 1;
+    SRC(1,3)=SRC(3,2)=SRC(5,1)=SRC(7,0)= (l3 + 2*l4 + l5 + 2) >> 2;
+    SRC(0,4)=SRC(2,3)=SRC(4,2)=SRC(6,1)= (l4 + l5 + 1) >> 1;
+    SRC(1,4)=SRC(3,3)=SRC(5,2)=SRC(7,1)= (l4 + 2*l5 + l6 + 2) >> 2;
+    SRC(0,5)=SRC(2,4)=SRC(4,3)=SRC(6,2)= (l5 + l6 + 1) >> 1;
+    SRC(1,5)=SRC(3,4)=SRC(5,3)=SRC(7,2)= (l5 + 2*l6 + l7 + 2) >> 2;
+    SRC(0,6)=SRC(2,5)=SRC(4,4)=SRC(6,3)= (l6 + l7 + 1) >> 1;
+    SRC(1,6)=SRC(3,5)=SRC(5,4)=SRC(7,3)= (l6 + 3*l7 + 2) >> 2;
+    SRC(0,7)=SRC(1,7)=SRC(2,6)=SRC(2,7)=SRC(3,6)=
+    SRC(3,7)=SRC(4,5)=SRC(4,6)=SRC(4,7)=SRC(5,5)=
+    SRC(5,6)=SRC(5,7)=SRC(6,4)=SRC(6,5)=SRC(6,6)=
+    SRC(6,7)=SRC(7,4)=SRC(7,5)=SRC(7,6)=SRC(7,7)= l7;
+}
+#undef PREDICT_8x8_LOAD_LEFT
+#undef PREDICT_8x8_LOAD_TOP
+#undef PREDICT_8x8_LOAD_TOPLEFT
+#undef PREDICT_8x8_LOAD_TOPRIGHT
+#undef PREDICT_8x8_DC
+#undef PTR
+#undef PT
+#undef PL
+#undef SRC
+
+static void pred4x4_vertical_add_c(uint8_t *pix, const DCTELEM *block, int stride){
+    int i;
+    pix -= stride;
+    for(i=0; i<4; i++){
+        uint8_t v = pix[0];
+        pix[1*stride]= v += block[0];
+        pix[2*stride]= v += block[4];
+        pix[3*stride]= v += block[8];
+        pix[4*stride]= v +  block[12];
+        pix++;
+        block++;
+    }
+}
+
+static void pred4x4_horizontal_add_c(uint8_t *pix, const DCTELEM *block, int stride){
+    int i;
+    for(i=0; i<4; i++){
+        uint8_t v = pix[-1];
+        pix[0]= v += block[0];
+        pix[1]= v += block[1];
+        pix[2]= v += block[2];
+        pix[3]= v +  block[3];
+        pix+= stride;
+        block+= 4;
+    }
+}
+
+static void pred8x8l_vertical_add_c(uint8_t *pix, const DCTELEM *block, int stride){
+    int i;
+    pix -= stride;
+    for(i=0; i<8; i++){
+        uint8_t v = pix[0];
+        pix[1*stride]= v += block[0];
+        pix[2*stride]= v += block[8];
+        pix[3*stride]= v += block[16];
+        pix[4*stride]= v += block[24];
+        pix[5*stride]= v += block[32];
+        pix[6*stride]= v += block[40];
+        pix[7*stride]= v += block[48];
+        pix[8*stride]= v +  block[56];
+        pix++;
+        block++;
+    }
+}
+
+static void pred8x8l_horizontal_add_c(uint8_t *pix, const DCTELEM *block, int stride){
+    int i;
+    for(i=0; i<8; i++){
+        uint8_t v = pix[-1];
+        pix[0]= v += block[0];
+        pix[1]= v += block[1];
+        pix[2]= v += block[2];
+        pix[3]= v += block[3];
+        pix[4]= v += block[4];
+        pix[5]= v += block[5];
+        pix[6]= v += block[6];
+        pix[7]= v +  block[7];
+        pix+= stride;
+        block+= 8;
+    }
+}
+
+static void pred16x16_vertical_add_c(uint8_t *pix, const int *block_offset, const DCTELEM *block, int stride){
+    int i;
+    for(i=0; i<16; i++)
+        pred4x4_vertical_add_c(pix + block_offset[i], block + i*16, stride);
+}
+
+static void pred16x16_horizontal_add_c(uint8_t *pix, const int *block_offset, const DCTELEM *block, int stride){
+    int i;
+    for(i=0; i<16; i++)
+        pred4x4_horizontal_add_c(pix + block_offset[i], block + i*16, stride);
+}
+
+static void pred8x8_vertical_add_c(uint8_t *pix, const int *block_offset, const DCTELEM *block, int stride){
+    int i;
+    for(i=0; i<4; i++)
+        pred4x4_vertical_add_c(pix + block_offset[i], block + i*16, stride);
+}
+
+static void pred8x8_horizontal_add_c(uint8_t *pix, const int *block_offset, const DCTELEM *block, int stride){
+    int i;
+    for(i=0; i<4; i++)
+        pred4x4_horizontal_add_c(pix + block_offset[i], block + i*16, stride);
+}