234 строки
6.0 KiB
C
234 строки
6.0 KiB
C
/*
|
|
* Copyright (c) 2010 The WebM project authors. All Rights Reserved.
|
|
*
|
|
* Use of this source code is governed by a BSD-style license
|
|
* that can be found in the LICENSE file in the root of the source
|
|
* tree. An additional intellectual property rights grant can be found
|
|
* in the file PATENTS. All contributing project authors may
|
|
* be found in the AUTHORS file in the root of the source tree.
|
|
*/
|
|
|
|
|
|
#include "onyx_int.h"
|
|
|
|
void vp8_ssim_parms_16x16_c
|
|
(
|
|
unsigned char *s,
|
|
int sp,
|
|
unsigned char *r,
|
|
int rp,
|
|
unsigned long *sum_s,
|
|
unsigned long *sum_r,
|
|
unsigned long *sum_sq_s,
|
|
unsigned long *sum_sq_r,
|
|
unsigned long *sum_sxr
|
|
)
|
|
{
|
|
int i,j;
|
|
for(i=0;i<16;i++,s+=sp,r+=rp)
|
|
{
|
|
for(j=0;j<16;j++)
|
|
{
|
|
*sum_s += s[j];
|
|
*sum_r += r[j];
|
|
*sum_sq_s += s[j] * s[j];
|
|
*sum_sq_r += r[j] * r[j];
|
|
*sum_sxr += s[j] * r[j];
|
|
}
|
|
}
|
|
}
|
|
void vp8_ssim_parms_8x8_c
|
|
(
|
|
unsigned char *s,
|
|
int sp,
|
|
unsigned char *r,
|
|
int rp,
|
|
unsigned long *sum_s,
|
|
unsigned long *sum_r,
|
|
unsigned long *sum_sq_s,
|
|
unsigned long *sum_sq_r,
|
|
unsigned long *sum_sxr
|
|
)
|
|
{
|
|
int i,j;
|
|
for(i=0;i<8;i++,s+=sp,r+=rp)
|
|
{
|
|
for(j=0;j<8;j++)
|
|
{
|
|
*sum_s += s[j];
|
|
*sum_r += r[j];
|
|
*sum_sq_s += s[j] * s[j];
|
|
*sum_sq_r += r[j] * r[j];
|
|
*sum_sxr += s[j] * r[j];
|
|
}
|
|
}
|
|
}
|
|
|
|
const static int64_t cc1 = 26634; // (64^2*(.01*255)^2
|
|
const static int64_t cc2 = 239708; // (64^2*(.03*255)^2
|
|
|
|
static double similarity
|
|
(
|
|
unsigned long sum_s,
|
|
unsigned long sum_r,
|
|
unsigned long sum_sq_s,
|
|
unsigned long sum_sq_r,
|
|
unsigned long sum_sxr,
|
|
int count
|
|
)
|
|
{
|
|
int64_t ssim_n, ssim_d;
|
|
int64_t c1, c2;
|
|
|
|
//scale the constants by number of pixels
|
|
c1 = (cc1*count*count)>>12;
|
|
c2 = (cc2*count*count)>>12;
|
|
|
|
ssim_n = (2*sum_s*sum_r+ c1)*((int64_t) 2*count*sum_sxr-
|
|
(int64_t) 2*sum_s*sum_r+c2);
|
|
|
|
ssim_d = (sum_s*sum_s +sum_r*sum_r+c1)*
|
|
((int64_t)count*sum_sq_s-(int64_t)sum_s*sum_s +
|
|
(int64_t)count*sum_sq_r-(int64_t) sum_r*sum_r +c2) ;
|
|
|
|
return ssim_n * 1.0 / ssim_d;
|
|
}
|
|
|
|
static double ssim_16x16(unsigned char *s,int sp, unsigned char *r,int rp)
|
|
{
|
|
unsigned long sum_s=0,sum_r=0,sum_sq_s=0,sum_sq_r=0,sum_sxr=0;
|
|
vp8_ssim_parms_16x16(s, sp, r, rp, &sum_s, &sum_r, &sum_sq_s, &sum_sq_r, &sum_sxr);
|
|
return similarity(sum_s, sum_r, sum_sq_s, sum_sq_r, sum_sxr, 256);
|
|
}
|
|
static double ssim_8x8(unsigned char *s,int sp, unsigned char *r,int rp)
|
|
{
|
|
unsigned long sum_s=0,sum_r=0,sum_sq_s=0,sum_sq_r=0,sum_sxr=0;
|
|
vp8_ssim_parms_8x8(s, sp, r, rp, &sum_s, &sum_r, &sum_sq_s, &sum_sq_r, &sum_sxr);
|
|
return similarity(sum_s, sum_r, sum_sq_s, sum_sq_r, sum_sxr, 64);
|
|
}
|
|
|
|
// TODO: (jbb) tried to scale this function such that we may be able to use it
|
|
// for distortion metric in mode selection code ( provided we do a reconstruction)
|
|
long dssim(unsigned char *s,int sp, unsigned char *r,int rp)
|
|
{
|
|
unsigned long sum_s=0,sum_r=0,sum_sq_s=0,sum_sq_r=0,sum_sxr=0;
|
|
int64_t ssim3;
|
|
int64_t ssim_n1,ssim_n2;
|
|
int64_t ssim_d1,ssim_d2;
|
|
int64_t ssim_t1,ssim_t2;
|
|
int64_t c1, c2;
|
|
|
|
// normalize by 256/64
|
|
c1 = cc1*16;
|
|
c2 = cc2*16;
|
|
|
|
vp8_ssim_parms_16x16(s, sp, r, rp, &sum_s, &sum_r, &sum_sq_s, &sum_sq_r, &sum_sxr);
|
|
ssim_n1 = (2*sum_s*sum_r+ c1);
|
|
|
|
ssim_n2 =((int64_t) 2*256*sum_sxr-(int64_t) 2*sum_s*sum_r+c2);
|
|
|
|
ssim_d1 =((int64_t)sum_s*sum_s +(int64_t)sum_r*sum_r+c1);
|
|
|
|
ssim_d2 = (256 * (int64_t) sum_sq_s-(int64_t) sum_s*sum_s +
|
|
(int64_t) 256*sum_sq_r-(int64_t) sum_r*sum_r +c2) ;
|
|
|
|
ssim_t1 = 256 - 256 * ssim_n1 / ssim_d1;
|
|
ssim_t2 = 256 - 256 * ssim_n2 / ssim_d2;
|
|
|
|
ssim3 = 256 *ssim_t1 * ssim_t2;
|
|
if(ssim3 <0 )
|
|
ssim3=0;
|
|
return (long)( ssim3 );
|
|
}
|
|
|
|
// We are using a 8x8 moving window with starting location of each 8x8 window
|
|
// on the 4x4 pixel grid. Such arrangement allows the windows to overlap
|
|
// block boundaries to penalize blocking artifacts.
|
|
double vp8_ssim2
|
|
(
|
|
unsigned char *img1,
|
|
unsigned char *img2,
|
|
int stride_img1,
|
|
int stride_img2,
|
|
int width,
|
|
int height
|
|
)
|
|
{
|
|
int i,j;
|
|
int samples =0;
|
|
double ssim_total=0;
|
|
|
|
// sample point start with each 4x4 location
|
|
for(i=0; i < height-8; i+=4, img1 += stride_img1*4, img2 += stride_img2*4)
|
|
{
|
|
for(j=0; j < width-8; j+=4 )
|
|
{
|
|
double v = ssim_8x8(img1+j, stride_img1, img2+j, stride_img2);
|
|
ssim_total += v;
|
|
samples++;
|
|
}
|
|
}
|
|
ssim_total /= samples;
|
|
return ssim_total;
|
|
}
|
|
double vp8_calc_ssim
|
|
(
|
|
YV12_BUFFER_CONFIG *source,
|
|
YV12_BUFFER_CONFIG *dest,
|
|
int lumamask,
|
|
double *weight
|
|
)
|
|
{
|
|
double a, b, c;
|
|
double ssimv;
|
|
|
|
a = vp8_ssim2(source->y_buffer, dest->y_buffer,
|
|
source->y_stride, dest->y_stride, source->y_width,
|
|
source->y_height);
|
|
|
|
b = vp8_ssim2(source->u_buffer, dest->u_buffer,
|
|
source->uv_stride, dest->uv_stride, source->uv_width,
|
|
source->uv_height);
|
|
|
|
c = vp8_ssim2(source->v_buffer, dest->v_buffer,
|
|
source->uv_stride, dest->uv_stride, source->uv_width,
|
|
source->uv_height);
|
|
|
|
ssimv = a * .8 + .1 * (b + c);
|
|
|
|
*weight = 1;
|
|
|
|
return ssimv;
|
|
}
|
|
|
|
double vp8_calc_ssimg
|
|
(
|
|
YV12_BUFFER_CONFIG *source,
|
|
YV12_BUFFER_CONFIG *dest,
|
|
double *ssim_y,
|
|
double *ssim_u,
|
|
double *ssim_v
|
|
)
|
|
{
|
|
double ssim_all = 0;
|
|
double a, b, c;
|
|
|
|
a = vp8_ssim2(source->y_buffer, dest->y_buffer,
|
|
source->y_stride, dest->y_stride, source->y_width,
|
|
source->y_height);
|
|
|
|
b = vp8_ssim2(source->u_buffer, dest->u_buffer,
|
|
source->uv_stride, dest->uv_stride, source->uv_width,
|
|
source->uv_height);
|
|
|
|
c = vp8_ssim2(source->v_buffer, dest->v_buffer,
|
|
source->uv_stride, dest->uv_stride, source->uv_width,
|
|
source->uv_height);
|
|
*ssim_y = a;
|
|
*ssim_u = b;
|
|
*ssim_v = c;
|
|
ssim_all = (a * 4 + b + c) /6;
|
|
|
|
return ssim_all;
|
|
}
|