ref: 3ccbd4803bcc75be860dd67bb3a56b114251433b
dir: libvpx/vpx_dsp/psnr.c
/*
* Copyright (c) 2016 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 <math.h>
#include <assert.h>
#include "./vpx_dsp_rtcd.h"
#include "vpx_dsp/psnr.h"
#include "vpx_scale/yv12config.h"
double vpx_sse_to_psnr(double samples, double peak, double sse) {
if (sse > 0.0) {
const double psnr = 10.0 * log10(samples * peak * peak / sse);
return psnr > MAX_PSNR ? MAX_PSNR : psnr;
} else {
return MAX_PSNR;
}
}
/* TODO(yaowu): The block_variance calls the unoptimized versions of variance()
* and highbd_8_variance(). It should not.
*/
static void encoder_variance(const uint8_t *a, int a_stride, const uint8_t *b,
int b_stride, int w, int h, unsigned int *sse,
int *sum) {
int i, j;
*sum = 0;
*sse = 0;
for (i = 0; i < h; i++) {
for (j = 0; j < w; j++) {
const int diff = a[j] - b[j];
*sum += diff;
*sse += diff * diff;
}
a += a_stride;
b += b_stride;
}
}
#if CONFIG_VP9_HIGHBITDEPTH
static void encoder_highbd_variance64(const uint8_t *a8, int a_stride,
const uint8_t *b8, int b_stride, int w,
int h, uint64_t *sse, int64_t *sum) {
int i, j;
uint16_t *a = CONVERT_TO_SHORTPTR(a8);
uint16_t *b = CONVERT_TO_SHORTPTR(b8);
*sum = 0;
*sse = 0;
for (i = 0; i < h; i++) {
for (j = 0; j < w; j++) {
const int diff = a[j] - b[j];
*sum += diff;
*sse += diff * diff;
}
a += a_stride;
b += b_stride;
}
}
static void encoder_highbd_8_variance(const uint8_t *a8, int a_stride,
const uint8_t *b8, int b_stride, int w,
int h, unsigned int *sse, int *sum) {
uint64_t sse_long = 0;
int64_t sum_long = 0;
encoder_highbd_variance64(a8, a_stride, b8, b_stride, w, h, &sse_long,
&sum_long);
*sse = (unsigned int)sse_long;
*sum = (int)sum_long;
}
#endif // CONFIG_VP9_HIGHBITDEPTH
static int64_t get_sse(const uint8_t *a, int a_stride, const uint8_t *b,
int b_stride, int width, int height) {
const int dw = width % 16;
const int dh = height % 16;
int64_t total_sse = 0;
unsigned int sse = 0;
int sum = 0;
int x, y;
if (dw > 0) {
encoder_variance(&a[width - dw], a_stride, &b[width - dw], b_stride, dw,
height, &sse, &sum);
total_sse += sse;
}
if (dh > 0) {
encoder_variance(&a[(height - dh) * a_stride], a_stride,
&b[(height - dh) * b_stride], b_stride, width - dw, dh,
&sse, &sum);
total_sse += sse;
}
for (y = 0; y < height / 16; ++y) {
const uint8_t *pa = a;
const uint8_t *pb = b;
for (x = 0; x < width / 16; ++x) {
vpx_mse16x16(pa, a_stride, pb, b_stride, &sse);
total_sse += sse;
pa += 16;
pb += 16;
}
a += 16 * a_stride;
b += 16 * b_stride;
}
return total_sse;
}
#if CONFIG_VP9_HIGHBITDEPTH
static int64_t highbd_get_sse_shift(const uint8_t *a8, int a_stride,
const uint8_t *b8, int b_stride, int width,
int height, unsigned int input_shift) {
const uint16_t *a = CONVERT_TO_SHORTPTR(a8);
const uint16_t *b = CONVERT_TO_SHORTPTR(b8);
int64_t total_sse = 0;
int x, y;
for (y = 0; y < height; ++y) {
for (x = 0; x < width; ++x) {
int64_t diff;
diff = (a[x] >> input_shift) - (b[x] >> input_shift);
total_sse += diff * diff;
}
a += a_stride;
b += b_stride;
}
return total_sse;
}
static int64_t highbd_get_sse(const uint8_t *a, int a_stride, const uint8_t *b,
int b_stride, int width, int height) {
int64_t total_sse = 0;
int x, y;
const int dw = width % 16;
const int dh = height % 16;
unsigned int sse = 0;
int sum = 0;
if (dw > 0) {
encoder_highbd_8_variance(&a[width - dw], a_stride, &b[width - dw],
b_stride, dw, height, &sse, &sum);
total_sse += sse;
}
if (dh > 0) {
encoder_highbd_8_variance(&a[(height - dh) * a_stride], a_stride,
&b[(height - dh) * b_stride], b_stride,
width - dw, dh, &sse, &sum);
total_sse += sse;
}
for (y = 0; y < height / 16; ++y) {
const uint8_t *pa = a;
const uint8_t *pb = b;
for (x = 0; x < width / 16; ++x) {
vpx_highbd_8_mse16x16(pa, a_stride, pb, b_stride, &sse);
total_sse += sse;
pa += 16;
pb += 16;
}
a += 16 * a_stride;
b += 16 * b_stride;
}
return total_sse;
}
#endif // CONFIG_VP9_HIGHBITDEPTH
int64_t vpx_get_y_sse(const YV12_BUFFER_CONFIG *a,
const YV12_BUFFER_CONFIG *b) {
assert(a->y_crop_width == b->y_crop_width);
assert(a->y_crop_height == b->y_crop_height);
return get_sse(a->y_buffer, a->y_stride, b->y_buffer, b->y_stride,
a->y_crop_width, a->y_crop_height);
}
#if CONFIG_VP9_HIGHBITDEPTH
int64_t vpx_highbd_get_y_sse(const YV12_BUFFER_CONFIG *a,
const YV12_BUFFER_CONFIG *b) {
assert(a->y_crop_width == b->y_crop_width);
assert(a->y_crop_height == b->y_crop_height);
assert((a->flags & YV12_FLAG_HIGHBITDEPTH) != 0);
assert((b->flags & YV12_FLAG_HIGHBITDEPTH) != 0);
return highbd_get_sse(a->y_buffer, a->y_stride, b->y_buffer, b->y_stride,
a->y_crop_width, a->y_crop_height);
}
#endif // CONFIG_VP9_HIGHBITDEPTH
#if CONFIG_VP9_HIGHBITDEPTH
void vpx_calc_highbd_psnr(const YV12_BUFFER_CONFIG *a,
const YV12_BUFFER_CONFIG *b, PSNR_STATS *psnr,
uint32_t bit_depth, uint32_t in_bit_depth) {
const int widths[3] = { a->y_crop_width, a->uv_crop_width, a->uv_crop_width };
const int heights[3] = { a->y_crop_height, a->uv_crop_height,
a->uv_crop_height };
const uint8_t *a_planes[3] = { a->y_buffer, a->u_buffer, a->v_buffer };
const int a_strides[3] = { a->y_stride, a->uv_stride, a->uv_stride };
const uint8_t *b_planes[3] = { b->y_buffer, b->u_buffer, b->v_buffer };
const int b_strides[3] = { b->y_stride, b->uv_stride, b->uv_stride };
int i;
uint64_t total_sse = 0;
uint32_t total_samples = 0;
const double peak = (double)((1 << in_bit_depth) - 1);
const unsigned int input_shift = bit_depth - in_bit_depth;
for (i = 0; i < 3; ++i) {
const int w = widths[i];
const int h = heights[i];
const uint32_t samples = w * h;
uint64_t sse;
if (a->flags & YV12_FLAG_HIGHBITDEPTH) {
if (input_shift) {
sse = highbd_get_sse_shift(a_planes[i], a_strides[i], b_planes[i],
b_strides[i], w, h, input_shift);
} else {
sse = highbd_get_sse(a_planes[i], a_strides[i], b_planes[i],
b_strides[i], w, h);
}
} else {
sse = get_sse(a_planes[i], a_strides[i], b_planes[i], b_strides[i], w, h);
}
psnr->sse[1 + i] = sse;
psnr->samples[1 + i] = samples;
psnr->psnr[1 + i] = vpx_sse_to_psnr(samples, peak, (double)sse);
total_sse += sse;
total_samples += samples;
}
psnr->sse[0] = total_sse;
psnr->samples[0] = total_samples;
psnr->psnr[0] =
vpx_sse_to_psnr((double)total_samples, peak, (double)total_sse);
}
#endif // !CONFIG_VP9_HIGHBITDEPTH
void vpx_calc_psnr(const YV12_BUFFER_CONFIG *a, const YV12_BUFFER_CONFIG *b,
PSNR_STATS *psnr) {
static const double peak = 255.0;
const int widths[3] = { a->y_crop_width, a->uv_crop_width, a->uv_crop_width };
const int heights[3] = { a->y_crop_height, a->uv_crop_height,
a->uv_crop_height };
const uint8_t *a_planes[3] = { a->y_buffer, a->u_buffer, a->v_buffer };
const int a_strides[3] = { a->y_stride, a->uv_stride, a->uv_stride };
const uint8_t *b_planes[3] = { b->y_buffer, b->u_buffer, b->v_buffer };
const int b_strides[3] = { b->y_stride, b->uv_stride, b->uv_stride };
int i;
uint64_t total_sse = 0;
uint32_t total_samples = 0;
for (i = 0; i < 3; ++i) {
const int w = widths[i];
const int h = heights[i];
const uint32_t samples = w * h;
const uint64_t sse =
get_sse(a_planes[i], a_strides[i], b_planes[i], b_strides[i], w, h);
psnr->sse[1 + i] = sse;
psnr->samples[1 + i] = samples;
psnr->psnr[1 + i] = vpx_sse_to_psnr(samples, peak, (double)sse);
total_sse += sse;
total_samples += samples;
}
psnr->sse[0] = total_sse;
psnr->samples[0] = total_samples;
psnr->psnr[0] =
vpx_sse_to_psnr((double)total_samples, peak, (double)total_sse);
}