diff options
Diffstat (limited to '')
-rw-r--r-- | third_party/aom/aom_dsp/sum_squares.c | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/third_party/aom/aom_dsp/sum_squares.c b/third_party/aom/aom_dsp/sum_squares.c new file mode 100644 index 0000000000..f58defaa11 --- /dev/null +++ b/third_party/aom/aom_dsp/sum_squares.c @@ -0,0 +1,90 @@ +/* + * 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; +} |