ref: 023304e4fe75d0799b1e9d79e839ea9e70b48e50
parent: 5cf8a3272b57f40aa29768fe5f98f72a858a5803
parent: 7968d29fedfda970bf49b20c5ef1a227df2b745a
author: Yaowu Xu <yaowu@google.com>
date: Mon May 14 15:28:21 EDT 2012
Merge "Reversible WHT pair" into experimental
--- a/vp8/common/idctllm.c
+++ b/vp8/common/idctllm.c
@@ -138,65 +138,60 @@
{int i;
int a1, b1, c1, d1;
- int a2, b2, c2, d2;
short *ip = input;
short *op = output;
for (i = 0; i < 4; i++)
{- a1 = ip[0] + ip[12];
- b1 = ip[4] + ip[8];
- c1 = ip[4] - ip[8];
- d1 = ip[0] - ip[12];
+ a1 = ((ip[0] + ip[3]));
+ b1 = ((ip[1] + ip[2]));
+ c1 = ((ip[1] - ip[2]));
+ d1 = ((ip[0] - ip[3]));
- op[0] = a1 + b1;
- op[4] = c1 + d1;
- op[8] = a1 - b1;
- op[12] = d1 - c1;
- ip++;
- op++;
+ op[0] = (a1 + b1 + 1)>>1;
+ op[1] = (c1 + d1)>>1;
+ op[2] = (a1 - b1)>>1;
+ op[3] = (d1 - c1)>>1;
+
+ ip += 4;
+ op += 4;
}
ip = output;
op = output;
-
for (i = 0; i < 4; i++)
{- a1 = ip[0] + ip[3];
- b1 = ip[1] + ip[2];
- c1 = ip[1] - ip[2];
- d1 = ip[0] - ip[3];
-
- a2 = a1 + b1;
- b2 = c1 + d1;
- c2 = a1 - b1;
- d2 = d1 - c1;
-
- op[0] = (a2 + 1) >> 2;
- op[1] = (b2 + 1) >> 2;
- op[2] = (c2 + 1) >> 2;
- op[3] = (d2 + 1) >> 2;
-
- ip += 4;
- op += 4;
+ a1 = ip[0] + ip[12];
+ b1 = ip[4] + ip[8];
+ c1 = ip[4] - ip[8];
+ d1 = ip[0] - ip[12];
+ op[0] = (a1 + b1 + 1)>>1;
+ op[4] = (c1 + d1)>>1;
+ op[8] = (a1 - b1)>>1;
+ op[12]= (d1 - c1)>>1;
+ ip++;
+ op++;
}
}
-void vp8_short_inv_walsh4x4_1_c(short *input, short *output)
+void vp8_short_inv_walsh4x4_1_c(short *in, short *out)
{int i;
- int a1;
- short *op = output;
+ short tmp[4];
+ short *ip = in;
+ short *op = tmp;
- a1 = (input[0] + 1 )>> 2;
+ op[0] =(ip[0]+ 1)>>1;
+ op[1] = op[2] = op[3] = (ip[0]>>1);
- for (i = 0; i < 4; i++)
+ ip = tmp;
+ op = out;
+ for(i = 0; i<4; i++)
{- op[0] = a1;
- op[1] = a1;
- op[2] = a1;
- op[3] = a1;
- op += 4;
+ op[0] =(ip[0]+ 1)>>1;
+ op[4] = op[8] = op[12] = (ip[0]>>1);
+ ip ++;
+ op ++;
}
}
--- a/vp8/encoder/dct.c
+++ b/vp8/encoder/dct.c
@@ -13,10 +13,6 @@
#include "vpx_ports/config.h"
-
-
-
-
void vp8_short_fdct8x8_c(short *block, short *coefs, int pitch)
{int j1, i, j, k;
@@ -181,52 +177,41 @@
{int i;
int a1, b1, c1, d1;
- int a2, b2, c2, d2;
short *ip = input;
short *op = output;
+ int pitch_short = pitch >>1;
-
for (i = 0; i < 4; i++)
{- a1 = ((ip[0] + ip[2]));
- d1 = ((ip[1] + ip[3]));
- c1 = ((ip[1] - ip[3]));
- b1 = ((ip[0] - ip[2]));
+ a1 = ip[0 * pitch_short] + ip[3 * pitch_short];
+ b1 = ip[1 * pitch_short] + ip[2 * pitch_short];
+ c1 = ip[1 * pitch_short] - ip[2 * pitch_short];
+ d1 = ip[0 * pitch_short] - ip[3 * pitch_short];
- op[0] = a1 + d1;
- op[1] = b1 + c1;
- op[2] = b1 - c1;
- op[3] = a1 - d1;
- ip += pitch / 2;
- op += 4;
- }
+ op[0] = (a1 + b1 + 1)>>1;
+ op[4] = (c1 + d1)>>1;
+ op[8] = (a1 - b1)>>1;
+ op[12]= (d1 - c1)>>1;
+ ip++;
+ op++;
+ }
ip = output;
op = output;
for (i = 0; i < 4; i++)
{- a1 = ip[0] + ip[8];
- d1 = ip[4] + ip[12];
- c1 = ip[4] - ip[12];
- b1 = ip[0] - ip[8];
+ a1 = ip[0] + ip[3];
+ b1 = ip[1] + ip[2];
+ c1 = ip[1] - ip[2];
+ d1 = ip[0] - ip[3];
- a2 = a1 + d1;
- b2 = b1 + c1;
- c2 = b1 - c1;
- d2 = a1 - d1;
+ op[0] = (a1 + b1 + 1)>>1;
+ op[1] = (c1 + d1)>>1;
+ op[2] = (a1 - b1)>>1;
+ op[3] = (d1 - c1)>>1;
- a2 += a2<0;
- b2 += b2<0;
- c2 += c2<0;
- d2 += d2<0;
-
- op[0] = (a2+1) >> 2;
- op[4] = (b2+1) >> 2;
- op[8] = (c2+1) >> 2;
- op[12]= (d2+1) >> 2;
-
- ip++;
- op++;
+ ip += 4;
+ op += 4;
}
}