Imported Debian version 2.5.3~trusty1
[deb_ffmpeg.git] / ffmpeg / libavcodec / videodsp_template.c
CommitLineData
2ba45a60
DM
1/*
2 * Copyright (c) 2002-2012 Michael Niedermayer
3 * Copyright (C) 2012 Ronald S. Bultje
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg 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 * FFmpeg 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 FFmpeg; 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"
25void FUNC(ff_emulated_edge_mc)(uint8_t *buf, const uint8_t *src,
26 ptrdiff_t buf_linesize,
27 ptrdiff_t src_linesize,
28 int block_w, int block_h,
29 int src_x, int src_y, int w, int h)
30{
31 int x, y;
32 int start_y, start_x, end_y, end_x;
33
34 if (!w || !h)
35 return;
36
37 if (src_y >= h) {
38 src -= src_y * src_linesize;
39 src += (h - 1) * src_linesize;
40 src_y = h - 1;
41 } else if (src_y <= -block_h) {
42 src -= src_y * src_linesize;
43 src += (1 - block_h) * src_linesize;
44 src_y = 1 - block_h;
45 }
46 if (src_x >= w) {
47 src += (w - 1 - src_x) * sizeof(pixel);
48 src_x = w - 1;
49 } else if (src_x <= -block_w) {
50 src += (1 - block_w - src_x) * sizeof(pixel);
51 src_x = 1 - block_w;
52 }
53
54 start_y = FFMAX(0, -src_y);
55 start_x = FFMAX(0, -src_x);
56 end_y = FFMIN(block_h, h-src_y);
57 end_x = FFMIN(block_w, w-src_x);
58 av_assert2(start_y < end_y && block_h);
59 av_assert2(start_x < end_x && block_w);
60
61 w = end_x - start_x;
62 src += start_y * src_linesize + start_x * sizeof(pixel);
63 buf += start_x * sizeof(pixel);
64
65 // top
66 for (y = 0; y < start_y; y++) {
67 memcpy(buf, src, w * sizeof(pixel));
68 buf += buf_linesize;
69 }
70
71 // copy existing part
72 for (; y < end_y; y++) {
73 memcpy(buf, src, w * sizeof(pixel));
74 src += src_linesize;
75 buf += buf_linesize;
76 }
77
78 // bottom
79 src -= src_linesize;
80 for (; y < block_h; y++) {
81 memcpy(buf, src, w * sizeof(pixel));
82 buf += buf_linesize;
83 }
84
85 buf -= block_h * buf_linesize + start_x * sizeof(pixel);
86 while (block_h--) {
87 pixel *bufp = (pixel *) buf;
88
89 // left
90 for(x = 0; x < start_x; x++) {
91 bufp[x] = bufp[start_x];
92 }
93
94 // right
95 for (x = end_x; x < block_w; x++) {
96 bufp[x] = bufp[end_x - 1];
97 }
98 buf += buf_linesize;
99 }
100}