Libav
videodsp_template.c
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1 /*
2  * Copyright (c) 2002-2004 Michael Niedermayer
3  * Copyright (C) 2012 Ronald S. Bultje
4  *
5  * This file is part of Libav.
6  *
7  * Libav is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * Libav is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with Libav; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 #include <assert.h>
23 
24 #include "bit_depth_template.c"
25 
26 static void FUNC(ff_emulated_edge_mc)(uint8_t *buf, const uint8_t *src,
27  ptrdiff_t buf_linesize,
28  ptrdiff_t src_linesize,
29  int block_w, int block_h,
30  int src_x, int src_y, int w, int h)
31 {
32  int x, y;
33  int start_y, start_x, end_y, end_x;
34 
35  if (src_y >= h) {
36  src += (h - 1 - src_y) * src_linesize;
37  src_y = h - 1;
38  } else if (src_y <= -block_h) {
39  src += (1 - block_h - src_y) * src_linesize;
40  src_y = 1 - block_h;
41  }
42  if (src_x >= w) {
43  src += (w - 1 - src_x) * sizeof(pixel);
44  src_x = w - 1;
45  } else if (src_x <= -block_w) {
46  src += (1 - block_w - src_x) * sizeof(pixel);
47  src_x = 1 - block_w;
48  }
49 
50  start_y = FFMAX(0, -src_y);
51  start_x = FFMAX(0, -src_x);
52  end_y = FFMIN(block_h, h-src_y);
53  end_x = FFMIN(block_w, w-src_x);
54  assert(start_y < end_y && block_h);
55  assert(start_x < end_x && block_w);
56 
57  w = end_x - start_x;
58  src += start_y * src_linesize + start_x * sizeof(pixel);
59  buf += start_x * sizeof(pixel);
60 
61  // top
62  for (y = 0; y < start_y; y++) {
63  memcpy(buf, src, w * sizeof(pixel));
64  buf += buf_linesize;
65  }
66 
67  // copy existing part
68  for (; y < end_y; y++) {
69  memcpy(buf, src, w * sizeof(pixel));
70  src += src_linesize;
71  buf += buf_linesize;
72  }
73 
74  // bottom
75  src -= src_linesize;
76  for (; y < block_h; y++) {
77  memcpy(buf, src, w * sizeof(pixel));
78  buf += buf_linesize;
79  }
80 
81  buf -= block_h * buf_linesize + start_x * sizeof(pixel);
82  while (block_h--) {
83  pixel *bufp = (pixel *) buf;
84 
85  // left
86  for(x = 0; x < start_x; x++) {
87  bufp[x] = bufp[start_x];
88  }
89 
90  // right
91  for (x = end_x; x < block_w; x++) {
92  bufp[x] = bufp[end_x - 1];
93  }
94  buf += buf_linesize;
95  }
96 }
uint8_t
#define FUNC(a)
#define FFMAX(a, b)
Definition: common.h:55
#define FFMIN(a, b)
Definition: common.h:57
#define pixel
static void FUNC() ff_emulated_edge_mc(uint8_t *buf, const uint8_t *src, ptrdiff_t buf_linesize, ptrdiff_t src_linesize, int block_w, int block_h, int src_x, int src_y, int w, int h)