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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 | } |