FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/videodsp_template.c
Date: 2022-07-04 19:11:22
Exec Total Coverage
Lines: 42 43 97.7%
Branches: 0 0 -%

Line Branch Exec Source
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 #if BIT_DEPTH != 8
24 // ff_emulated_edge_mc_8 is used by the x86 MpegVideoDSP API.
25 static
26 #endif
27 13442950 void FUNC(ff_emulated_edge_mc)(uint8_t *buf, const uint8_t *src,
28 ptrdiff_t buf_linesize,
29 ptrdiff_t src_linesize,
30 int block_w, int block_h,
31 int src_x, int src_y, int w, int h)
32 {
33 int x, y;
34 int start_y, start_x, end_y, end_x;
35
36 13442950 if (!w || !h)
37 return;
38
39 av_assert2(block_w * sizeof(pixel) <= FFABS(buf_linesize));
40
41 13442950 if (src_y >= h) {
42 130709 src -= src_y * src_linesize;
43 130709 src += (h - 1) * src_linesize;
44 130709 src_y = h - 1;
45 13312241 } else if (src_y <= -block_h) {
46 31423 src -= src_y * src_linesize;
47 31423 src += (1 - block_h) * src_linesize;
48 31423 src_y = 1 - block_h;
49 }
50 13442950 if (src_x >= w) {
51 // The subtracted expression has an unsigned type and must thus not be negative
52 161476 src -= (1 + src_x - w) * sizeof(pixel);
53 161476 src_x = w - 1;
54 13281474 } else if (src_x <= -block_w) {
55 39631 src += (1 - block_w - src_x) * sizeof(pixel);
56 39631 src_x = 1 - block_w;
57 }
58
59 13442950 start_y = FFMAX(0, -src_y);
60 13442950 start_x = FFMAX(0, -src_x);
61 13442950 end_y = FFMIN(block_h, h-src_y);
62 13442950 end_x = FFMIN(block_w, w-src_x);
63 av_assert2(start_y < end_y && block_h);
64 av_assert2(start_x < end_x && block_w);
65
66 13442950 w = end_x - start_x;
67 13442950 src += start_y * src_linesize + start_x * sizeof(pixel);
68 13442950 buf += start_x * sizeof(pixel);
69
70 // top
71 19732567 for (y = 0; y < start_y; y++) {
72 6289617 memcpy(buf, src, w * sizeof(pixel));
73 6289617 buf += buf_linesize;
74 }
75
76 // copy existing part
77 178811874 for (; y < end_y; y++) {
78 165368924 memcpy(buf, src, w * sizeof(pixel));
79 165368924 src += src_linesize;
80 165368924 buf += buf_linesize;
81 }
82
83 // bottom
84 13442950 src -= src_linesize;
85 38427314 for (; y < block_h; y++) {
86 24984364 memcpy(buf, src, w * sizeof(pixel));
87 24984364 buf += buf_linesize;
88 }
89
90 13442950 buf -= block_h * buf_linesize + start_x * sizeof(pixel);
91 210085855 while (block_h--) {
92 196642905 pixel *bufp = (pixel *) buf;
93
94 // left
95 285981103 for(x = 0; x < start_x; x++) {
96 89338198 bufp[x] = bufp[start_x];
97 }
98
99 // right
100 432579218 for (x = end_x; x < block_w; x++) {
101 235936313 bufp[x] = bufp[end_x - 1];
102 }
103 196642905 buf += buf_linesize;
104 }
105 }
106