subtract.c revision 7ce0a1d1337c01056ba24006efab21f00e179e04 
1/*
2 *  Copyright (c) 2015 The WebM project authors. All Rights Reserved.
3 *
4 *  Use of this source code is governed by a BSD-style license
5 *  that can be found in the LICENSE file in the root of the source
6 *  tree. An additional intellectual property rights grant can be found
7 *  in the file PATENTS.  All contributing project authors may
8 *  be found in the AUTHORS file in the root of the source tree.
9 */
10
11#include <stdlib.h>
12
13#include "./vpx_config.h"
14#include "./vpx_dsp_rtcd.h"
15
16#include "vpx/vpx_integer.h"
17#include "vpx_ports/mem.h"
18
19void vpx_subtract_block_c(int rows, int cols,
20                          int16_t *diff, ptrdiff_t diff_stride,
21                          const uint8_t *src, ptrdiff_t src_stride,
22                          const uint8_t *pred, ptrdiff_t pred_stride) {
23  int r, c;
24
25  for (r = 0; r < rows; r++) {
26    for (c = 0; c < cols; c++)
27      diff[c] = src[c] - pred[c];
28
29    diff += diff_stride;
30    pred += pred_stride;
31    src  += src_stride;
32  }
33}
34
35#if CONFIG_VP9_HIGHBITDEPTH
36void vpx_highbd_subtract_block_c(int rows, int cols,
37                                 int16_t *diff, ptrdiff_t diff_stride,
38                                 const uint8_t *src8, ptrdiff_t src_stride,
39                                 const uint8_t *pred8, ptrdiff_t pred_stride,
40                                 int bd) {
41  int r, c;
42  uint16_t *src = CONVERT_TO_SHORTPTR(src8);
43  uint16_t *pred = CONVERT_TO_SHORTPTR(pred8);
44  (void) bd;
45
46  for (r = 0; r < rows; r++) {
47    for (c = 0; c < cols; c++) {
48      diff[c] = src[c] - pred[c];
49    }
50
51    diff += diff_stride;
52    pred += pred_stride;
53    src  += src_stride;
54  }
55}
56#endif  // CONFIG_VP9_HIGHBITDEPTH
57