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/*
* Copyright (c) 2023 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.
*/
/*
* Sum the square of the difference between every corresponding element of the
* buffers.
*/
#include <stdlib.h>
#include "./vpx_config.h"
#include "./vpx_dsp_rtcd.h"
#include "vpx/vpx_integer.h"
#include "vpx_ports/mem.h"
int64_t vpx_sse_c(const uint8_t *a, int a_stride, const uint8_t *b,
int b_stride, int width, int height) {
int y, x;
int64_t sse = 0;
for (y = 0; y < height; y++) {
for (x = 0; x < width; x++) {
const int32_t diff = abs(a[x] - b[x]);
sse += diff * diff;
}
a += a_stride;
b += b_stride;
}
return sse;
}
#if CONFIG_VP9_HIGHBITDEPTH
int64_t vpx_highbd_sse_c(const uint8_t *a8, int a_stride, const uint8_t *b8,
int b_stride, int width, int height) {
int y, x;
int64_t sse = 0;
uint16_t *a = CONVERT_TO_SHORTPTR(a8);
uint16_t *b = CONVERT_TO_SHORTPTR(b8);
for (y = 0; y < height; y++) {
for (x = 0; x < width; x++) {
const int32_t diff = (int32_t)(a[x]) - (int32_t)(b[x]);
sse += diff * diff;
}
a += a_stride;
b += b_stride;
}
return sse;
}
#endif