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/*
* Copyright (c) 2016, Alliance for Open Media. All rights reserved
*
* This source code is subject to the terms of the BSD 2 Clause License and
* the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
* was not distributed with this source code in the LICENSE file, you can
* obtain it at www.aomedia.org/license/software. If the Alliance for Open
* Media Patent License 1.0 was not distributed with this source code in the
* PATENTS file, you can obtain it at www.aomedia.org/license/patent.
*/
#include <assert.h>
#include "config/aom_dsp_rtcd.h"
uint64_t aom_sum_squares_2d_i16_c(const int16_t *src, int src_stride, int width,
int height) {
int r, c;
uint64_t ss = 0;
for (r = 0; r < height; r++) {
for (c = 0; c < width; c++) {
const int16_t v = src[c];
ss += v * v;
}
src += src_stride;
}
return ss;
}
uint64_t aom_sum_squares_i16_c(const int16_t *src, uint32_t n) {
uint64_t ss = 0;
do {
const int16_t v = *src++;
ss += v * v;
} while (--n);
return ss;
}
uint64_t aom_var_2d_u8_c(uint8_t *src, int src_stride, int width, int height) {
int r, c;
uint64_t ss = 0, s = 0;
for (r = 0; r < height; r++) {
for (c = 0; c < width; c++) {
const uint8_t v = src[c];
ss += v * v;
s += v;
}
src += src_stride;
}
return (ss - s * s / (width * height));
}
uint64_t aom_var_2d_u16_c(uint8_t *src, int src_stride, int width, int height) {
uint16_t *srcp = CONVERT_TO_SHORTPTR(src);
int r, c;
uint64_t ss = 0, s = 0;
for (r = 0; r < height; r++) {
for (c = 0; c < width; c++) {
const uint16_t v = srcp[c];
ss += v * v;
s += v;
}
srcp += src_stride;
}
return (ss - s * s / (width * height));
}
uint64_t aom_sum_sse_2d_i16_c(const int16_t *src, int src_stride, int width,
int height, int *sum) {
int r, c;
int16_t *srcp = (int16_t *)src;
int64_t ss = 0;
for (r = 0; r < height; r++) {
for (c = 0; c < width; c++) {
const int16_t v = srcp[c];
ss += v * v;
*sum += v;
}
srcp += src_stride;
}
return ss;
}
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