blob: a58e45ad431322df223de07a6487b90b8bf9d423
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 | av_cold void ff_mpegvideodsp_init(MpegVideoDSPContext *c) |
111 | { |
112 | c->gmc1 = gmc1_c; |
113 | c->gmc = ff_gmc_c; |
114 | |
115 | if (ARCH_PPC) |
116 | ff_mpegvideodsp_init_ppc(c); |
117 | if (ARCH_X86) |
118 | ff_mpegvideodsp_init_x86(c); |
119 | } |
120 |