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Merge "Reversible WHT pair" into experimental

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This commit is contained in:
Yaowu Xu
2012-05-14 19:28:21 +00:00
committed by On2 (Google) Code Review
parent 5cf8a3272b 7968d29fed
commit 023304e4fe
2 changed files with 57 additions and 77 deletions
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75
vp8/common/idctllm.c
View File

@@ -138,65 +138,60 @@ void vp8_short_inv_walsh4x4_c(short *input, short *output)
{
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[3]));
b1 = ((ip[1] + ip[2]));
c1 = ((ip[1] - ip[2]));
d1 = ((ip[0] - ip[3]));
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[12];
b1 = ip[4] + ip[8];
c1 = ip[4] - ip[8];
d1 = ip[0] - ip[12];
op[0] = a1 + b1;
op[4] = c1 + d1;
op[8] = a1 - b1;
op[12] = d1 - c1;
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[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;
}
}
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 ++;
}
}

59
vp8/encoder/dct.c
View File

@@ -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 @@ void vp8_short_walsh4x4_c(short *input, short *output, int pitch)
{
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;
}
}