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 "bit_depth_template.c" |
23 |
|
13511994 |
void FUNC(ff_emulated_edge_mc)(uint8_t *buf, const uint8_t *src, |
24 |
|
|
ptrdiff_t buf_linesize, |
25 |
|
|
ptrdiff_t src_linesize, |
26 |
|
|
int block_w, int block_h, |
27 |
|
|
int src_x, int src_y, int w, int h) |
28 |
|
|
{ |
29 |
|
|
int x, y; |
30 |
|
|
int start_y, start_x, end_y, end_x; |
31 |
|
|
|
32 |
|
13511994 |
if (!w || !h) |
33 |
|
|
return; |
34 |
|
|
|
35 |
|
|
av_assert2(block_w * sizeof(pixel) <= FFABS(buf_linesize)); |
36 |
|
|
|
37 |
|
13511994 |
if (src_y >= h) { |
38 |
|
130564 |
src -= src_y * src_linesize; |
39 |
|
130564 |
src += (h - 1) * src_linesize; |
40 |
|
130564 |
src_y = h - 1; |
41 |
|
13381430 |
} else if (src_y <= -block_h) { |
42 |
|
31479 |
src -= src_y * src_linesize; |
43 |
|
31479 |
src += (1 - block_h) * src_linesize; |
44 |
|
31479 |
src_y = 1 - block_h; |
45 |
|
|
} |
46 |
|
13511994 |
if (src_x >= w) { |
47 |
|
|
// The subtracted expression has an unsigned type and must thus not be negative |
48 |
|
161413 |
src -= (1 + src_x - w) * sizeof(pixel); |
49 |
|
161413 |
src_x = w - 1; |
50 |
|
13350581 |
} else if (src_x <= -block_w) { |
51 |
|
39591 |
src += (1 - block_w - src_x) * sizeof(pixel); |
52 |
|
39591 |
src_x = 1 - block_w; |
53 |
|
|
} |
54 |
|
|
|
55 |
|
13511994 |
start_y = FFMAX(0, -src_y); |
56 |
|
13511994 |
start_x = FFMAX(0, -src_x); |
57 |
|
13511994 |
end_y = FFMIN(block_h, h-src_y); |
58 |
|
13511994 |
end_x = FFMIN(block_w, w-src_x); |
59 |
|
|
av_assert2(start_y < end_y && block_h); |
60 |
|
|
av_assert2(start_x < end_x && block_w); |
61 |
|
|
|
62 |
|
13511994 |
w = end_x - start_x; |
63 |
|
13511994 |
src += start_y * src_linesize + start_x * sizeof(pixel); |
64 |
|
13511994 |
buf += start_x * sizeof(pixel); |
65 |
|
|
|
66 |
|
|
// top |
67 |
|
19823317 |
for (y = 0; y < start_y; y++) { |
68 |
|
6311323 |
memcpy(buf, src, w * sizeof(pixel)); |
69 |
|
6311323 |
buf += buf_linesize; |
70 |
|
|
} |
71 |
|
|
|
72 |
|
|
// copy existing part |
73 |
|
179597425 |
for (; y < end_y; y++) { |
74 |
|
166085431 |
memcpy(buf, src, w * sizeof(pixel)); |
75 |
|
166085431 |
src += src_linesize; |
76 |
|
166085431 |
buf += buf_linesize; |
77 |
|
|
} |
78 |
|
|
|
79 |
|
|
// bottom |
80 |
|
13511994 |
src -= src_linesize; |
81 |
|
38571969 |
for (; y < block_h; y++) { |
82 |
|
25059975 |
memcpy(buf, src, w * sizeof(pixel)); |
83 |
|
25059975 |
buf += buf_linesize; |
84 |
|
|
} |
85 |
|
|
|
86 |
|
13511994 |
buf -= block_h * buf_linesize + start_x * sizeof(pixel); |
87 |
|
210968723 |
while (block_h--) { |
88 |
|
197456729 |
pixel *bufp = (pixel *) buf; |
89 |
|
|
|
90 |
|
|
// left |
91 |
|
287392786 |
for(x = 0; x < start_x; x++) { |
92 |
|
89936057 |
bufp[x] = bufp[start_x]; |
93 |
|
|
} |
94 |
|
|
|
95 |
|
|
// right |
96 |
|
433838859 |
for (x = end_x; x < block_w; x++) { |
97 |
|
236382130 |
bufp[x] = bufp[end_x - 1]; |
98 |
|
|
} |
99 |
|
197456729 |
buf += buf_linesize; |
100 |
|
|
} |
101 |
|
|
} |