1 /*
2 * Copyright (c) 2016, Alliance for Open Media. All rights reserved
3 *
4 * This source code is subject to the terms of the BSD 2 Clause License and
5 * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
6 * was not distributed with this source code in the LICENSE file, you can
7 * obtain it at www.aomedia.org/license/software. If the Alliance for Open
8 * Media Patent License 1.0 was not distributed with this source code in the
9 * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
10 */
11
12 #include <assert.h>
13
14 #include "config/aom_dsp_rtcd.h"
15
aom_sum_squares_2d_i16_c(const int16_t * src,int src_stride,int width,int height)16 uint64_t aom_sum_squares_2d_i16_c(const int16_t *src, int src_stride, int width,
17 int height) {
18 int r, c;
19 uint64_t ss = 0;
20
21 for (r = 0; r < height; r++) {
22 for (c = 0; c < width; c++) {
23 const int16_t v = src[c];
24 ss += v * v;
25 }
26 src += src_stride;
27 }
28
29 return ss;
30 }
31
aom_sum_squares_i16_c(const int16_t * src,uint32_t n)32 uint64_t aom_sum_squares_i16_c(const int16_t *src, uint32_t n) {
33 uint64_t ss = 0;
34 do {
35 const int16_t v = *src++;
36 ss += v * v;
37 } while (--n);
38
39 return ss;
40 }
41
aom_var_2d_u8_c(uint8_t * src,int src_stride,int width,int height)42 uint64_t aom_var_2d_u8_c(uint8_t *src, int src_stride, int width, int height) {
43 int r, c;
44 uint64_t ss = 0, s = 0;
45
46 for (r = 0; r < height; r++) {
47 for (c = 0; c < width; c++) {
48 const uint8_t v = src[c];
49 ss += v * v;
50 s += v;
51 }
52 src += src_stride;
53 }
54
55 return (ss - s * s / (width * height));
56 }
57
aom_var_2d_u16_c(uint8_t * src,int src_stride,int width,int height)58 uint64_t aom_var_2d_u16_c(uint8_t *src, int src_stride, int width, int height) {
59 uint16_t *srcp = CONVERT_TO_SHORTPTR(src);
60 int r, c;
61 uint64_t ss = 0, s = 0;
62
63 for (r = 0; r < height; r++) {
64 for (c = 0; c < width; c++) {
65 const uint16_t v = srcp[c];
66 ss += v * v;
67 s += v;
68 }
69 srcp += src_stride;
70 }
71
72 return (ss - s * s / (width * height));
73 }
74
aom_sum_sse_2d_i16_c(const int16_t * src,int src_stride,int width,int height,int * sum)75 uint64_t aom_sum_sse_2d_i16_c(const int16_t *src, int src_stride, int width,
76 int height, int *sum) {
77 int r, c;
78 int16_t *srcp = (int16_t *)src;
79 int64_t ss = 0;
80
81 for (r = 0; r < height; r++) {
82 for (c = 0; c < width; c++) {
83 const int16_t v = srcp[c];
84 ss += v * v;
85 *sum += v;
86 }
87 srcp += src_stride;
88 }
89 return ss;
90 }
91