ref: c9976b32b4397360192caef74a1bfee026d52b9c
dir: /vp9/encoder/vp9_variance.h/
/*
* 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.
*/
#ifndef VP9_ENCODER_VP9_VARIANCE_H_
#define VP9_ENCODER_VP9_VARIANCE_H_
#include "vpx/vpx_integer.h"
#include "vpx_ports/mem.h"
#ifdef __cplusplus
extern "C" {
#endif
// TODO(johannkoenig): All functions which depend on
// [highbd_][8|10|12_]variance should be refactored or moved to vpx_dsp.
static void 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 highbd_variance64(const uint8_t *a8, int a_stride,
const uint8_t *b8, int b_stride,
int w, int h, uint64_t *sse, uint64_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 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;
uint64_t sum_long = 0;
highbd_variance64(a8, a_stride, b8, b_stride, w, h, &sse_long, &sum_long);
*sse = (unsigned int)sse_long;
*sum = (int)sum_long;
}
#endif
typedef unsigned int(*vp9_sad_fn_t)(const uint8_t *src_ptr,
int source_stride,
const uint8_t *ref_ptr,
int ref_stride);
typedef unsigned int(*vp9_sad_avg_fn_t)(const uint8_t *src_ptr,
int source_stride,
const uint8_t *ref_ptr,
int ref_stride,
const uint8_t *second_pred);
typedef void (*vp9_sad_multi_fn_t)(const uint8_t *src_ptr,
int source_stride,
const uint8_t *ref_ptr,
int ref_stride,
unsigned int *sad_array);
typedef void (*vp9_sad_multi_d_fn_t)(const uint8_t *src_ptr,
int source_stride,
const uint8_t* const ref_ptr[],
int ref_stride, unsigned int *sad_array);
typedef unsigned int (*vp9_variance_fn_t)(const uint8_t *src_ptr,
int source_stride,
const uint8_t *ref_ptr,
int ref_stride,
unsigned int *sse);
typedef unsigned int (*vp9_subpixvariance_fn_t)(const uint8_t *src_ptr,
int source_stride,
int xoffset,
int yoffset,
const uint8_t *ref_ptr,
int Refstride,
unsigned int *sse);
typedef unsigned int (*vp9_subp_avg_variance_fn_t)(const uint8_t *src_ptr,
int source_stride,
int xoffset,
int yoffset,
const uint8_t *ref_ptr,
int Refstride,
unsigned int *sse,
const uint8_t *second_pred);
typedef struct vp9_variance_vtable {
vp9_sad_fn_t sdf;
vp9_sad_avg_fn_t sdaf;
vp9_variance_fn_t vf;
vp9_subpixvariance_fn_t svf;
vp9_subp_avg_variance_fn_t svaf;
vp9_sad_multi_fn_t sdx3f;
vp9_sad_multi_fn_t sdx8f;
vp9_sad_multi_d_fn_t sdx4df;
} vp9_variance_fn_ptr_t;
#ifdef __cplusplus
} // extern "C"
#endif
#endif // VP9_ENCODER_VP9_VARIANCE_H_