FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/mpegvideodsp.c
Date: 2021-09-16 08:47:15
Exec Total Coverage
Lines: 5 62 8.1%
Branches: 0 12 0.0%

Line Branch Exec Source
1 /*
2 * This file is part of FFmpeg.
3 *
4 * FFmpeg is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
8 *
9 * FFmpeg is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
13 *
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with FFmpeg; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18
19 #include "config.h"
20 #include "libavutil/attributes.h"
21 #include "libavutil/common.h"
22 #include "mpegvideodsp.h"
23
24 static void gmc1_c(uint8_t *dst, uint8_t *src, int stride, int h,
25 int x16, int y16, int rounder)
26 {
27 const int A = (16 - x16) * (16 - y16);
28 const int B = (x16) * (16 - y16);
29 const int C = (16 - x16) * (y16);
30 const int D = (x16) * (y16);
31 int i;
32
33 for (i = 0; i < h; i++) {
34 dst[0] = (A * src[0] + B * src[1] + C * src[stride + 0] + D * src[stride + 1] + rounder) >> 8;
35 dst[1] = (A * src[1] + B * src[2] + C * src[stride + 1] + D * src[stride + 2] + rounder) >> 8;
36 dst[2] = (A * src[2] + B * src[3] + C * src[stride + 2] + D * src[stride + 3] + rounder) >> 8;
37 dst[3] = (A * src[3] + B * src[4] + C * src[stride + 3] + D * src[stride + 4] + rounder) >> 8;
38 dst[4] = (A * src[4] + B * src[5] + C * src[stride + 4] + D * src[stride + 5] + rounder) >> 8;
39 dst[5] = (A * src[5] + B * src[6] + C * src[stride + 5] + D * src[stride + 6] + rounder) >> 8;
40 dst[6] = (A * src[6] + B * src[7] + C * src[stride + 6] + D * src[stride + 7] + rounder) >> 8;
41 dst[7] = (A * src[7] + B * src[8] + C * src[stride + 7] + D * src[stride + 8] + rounder) >> 8;
42 dst += stride;
43 src += stride;
44 }
45 }
46
47 void ff_gmc_c(uint8_t *dst, uint8_t *src, int stride, int h, int ox, int oy,
48 int dxx, int dxy, int dyx, int dyy, int shift, int r,
49 int width, int height)
50 {
51 int y, vx, vy;
52 const int s = 1 << shift;
53
54 width--;
55 height--;
56
57 for (y = 0; y < h; y++) {
58 int x;
59
60 vx = ox;
61 vy = oy;
62 for (x = 0; x < 8; x++) { // FIXME: optimize
63 int index;
64 int src_x = vx >> 16;
65 int src_y = vy >> 16;
66 int frac_x = src_x & (s - 1);
67 int frac_y = src_y & (s - 1);
68
69 src_x >>= shift;
70 src_y >>= shift;
71
72 if ((unsigned) src_x < width) {
73 if ((unsigned) src_y < height) {
74 index = src_x + src_y * stride;
75 dst[y * stride + x] =
76 ((src[index] * (s - frac_x) +
77 src[index + 1] * frac_x) * (s - frac_y) +
78 (src[index + stride] * (s - frac_x) +
79 src[index + stride + 1] * frac_x) * frac_y +
80 r) >> (shift * 2);
81 } else {
82 index = src_x + av_clip(src_y, 0, height) * stride;
83 dst[y * stride + x] =
84 ((src[index] * (s - frac_x) +
85 src[index + 1] * frac_x) * s +
86 r) >> (shift * 2);
87 }
88 } else {
89 if ((unsigned) src_y < height) {
90 index = av_clip(src_x, 0, width) + src_y * stride;
91 dst[y * stride + x] =
92 ((src[index] * (s - frac_y) +
93 src[index + stride] * frac_y) * s +
94 r) >> (shift * 2);
95 } else {
96 index = av_clip(src_x, 0, width) +
97 av_clip(src_y, 0, height) * stride;
98 dst[y * stride + x] = src[index];
99 }
100 }
101
102 vx += dxx;
103 vy += dyx;
104 }
105 ox += dxy;
106 oy += dyy;
107 }
108 }
109
110 749 av_cold void ff_mpegvideodsp_init(MpegVideoDSPContext *c)
111 {
112 749 c->gmc1 = gmc1_c;
113 749 c->gmc = ff_gmc_c;
114
115 if (ARCH_PPC)
116 ff_mpegvideodsp_init_ppc(c);
117 if (ARCH_X86)
118 749 ff_mpegvideodsp_init_x86(c);
119 749 }
120