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1 | /* |
2 | * Copyright (C) 2003 Mike Melanson | |
3 | * Copyright (C) 2003 Dr. Tim Ferguson | |
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 | /** | |
23 | * @file | |
24 | * id RoQ Video common functions based on work by Dr. Tim Ferguson | |
25 | */ | |
26 | ||
27 | #include "avcodec.h" | |
28 | #include "roqvideo.h" | |
29 | ||
30 | static inline void block_copy(unsigned char *out, unsigned char *in, | |
31 | int outstride, int instride, int sz) | |
32 | { | |
33 | int rows = sz; | |
34 | while(rows--) { | |
35 | memcpy(out, in, sz); | |
36 | out += outstride; | |
37 | in += instride; | |
38 | } | |
39 | } | |
40 | ||
41 | void ff_apply_vector_2x2(RoqContext *ri, int x, int y, roq_cell *cell) | |
42 | { | |
43 | unsigned char *bptr; | |
44 | int boffs,stride; | |
45 | ||
46 | stride = ri->current_frame->linesize[0]; | |
47 | boffs = y*stride + x; | |
48 | ||
49 | bptr = ri->current_frame->data[0] + boffs; | |
50 | bptr[0 ] = cell->y[0]; | |
51 | bptr[1 ] = cell->y[1]; | |
52 | bptr[stride ] = cell->y[2]; | |
53 | bptr[stride+1] = cell->y[3]; | |
54 | ||
55 | stride = ri->current_frame->linesize[1]; | |
56 | boffs = y*stride + x; | |
57 | ||
58 | bptr = ri->current_frame->data[1] + boffs; | |
59 | bptr[0 ] = | |
60 | bptr[1 ] = | |
61 | bptr[stride ] = | |
62 | bptr[stride+1] = cell->u; | |
63 | ||
64 | bptr = ri->current_frame->data[2] + boffs; | |
65 | bptr[0 ] = | |
66 | bptr[1 ] = | |
67 | bptr[stride ] = | |
68 | bptr[stride+1] = cell->v; | |
69 | } | |
70 | ||
71 | void ff_apply_vector_4x4(RoqContext *ri, int x, int y, roq_cell *cell) | |
72 | { | |
73 | unsigned char *bptr; | |
74 | int boffs,stride; | |
75 | ||
76 | stride = ri->current_frame->linesize[0]; | |
77 | boffs = y*stride + x; | |
78 | ||
79 | bptr = ri->current_frame->data[0] + boffs; | |
80 | bptr[ 0] = bptr[ 1] = bptr[stride ] = bptr[stride +1] = cell->y[0]; | |
81 | bptr[ 2] = bptr[ 3] = bptr[stride +2] = bptr[stride +3] = cell->y[1]; | |
82 | bptr[stride*2 ] = bptr[stride*2+1] = bptr[stride*3 ] = bptr[stride*3+1] = cell->y[2]; | |
83 | bptr[stride*2+2] = bptr[stride*2+3] = bptr[stride*3+2] = bptr[stride*3+3] = cell->y[3]; | |
84 | ||
85 | stride = ri->current_frame->linesize[1]; | |
86 | boffs = y*stride + x; | |
87 | ||
88 | bptr = ri->current_frame->data[1] + boffs; | |
89 | bptr[ 0] = bptr[ 1] = bptr[stride ] = bptr[stride +1] = | |
90 | bptr[ 2] = bptr[ 3] = bptr[stride +2] = bptr[stride +3] = | |
91 | bptr[stride*2 ] = bptr[stride*2+1] = bptr[stride*3 ] = bptr[stride*3+1] = | |
92 | bptr[stride*2+2] = bptr[stride*2+3] = bptr[stride*3+2] = bptr[stride*3+3] = cell->u; | |
93 | ||
94 | bptr = ri->current_frame->data[2] + boffs; | |
95 | bptr[ 0] = bptr[ 1] = bptr[stride ] = bptr[stride +1] = | |
96 | bptr[ 2] = bptr[ 3] = bptr[stride +2] = bptr[stride +3] = | |
97 | bptr[stride*2 ] = bptr[stride*2+1] = bptr[stride*3 ] = bptr[stride*3+1] = | |
98 | bptr[stride*2+2] = bptr[stride*2+3] = bptr[stride*3+2] = bptr[stride*3+3] = cell->v; | |
99 | } | |
100 | ||
101 | ||
102 | static inline void apply_motion_generic(RoqContext *ri, int x, int y, int deltax, | |
103 | int deltay, int sz) | |
104 | { | |
105 | int mx, my, cp; | |
106 | ||
107 | mx = x + deltax; | |
108 | my = y + deltay; | |
109 | ||
110 | /* check MV against frame boundaries */ | |
111 | if ((mx < 0) || (mx > ri->width - sz) || | |
112 | (my < 0) || (my > ri->height - sz)) { | |
113 | av_log(ri->avctx, AV_LOG_ERROR, "motion vector out of bounds: MV = (%d, %d), boundaries = (0, 0, %d, %d)\n", | |
114 | mx, my, ri->width, ri->height); | |
115 | return; | |
116 | } | |
117 | ||
118 | if (!ri->last_frame->data[0]) { | |
119 | av_log(ri->avctx, AV_LOG_ERROR, "Invalid decode type. Invalid header?\n"); | |
120 | return; | |
121 | } | |
122 | ||
123 | for(cp = 0; cp < 3; cp++) { | |
124 | int outstride = ri->current_frame->linesize[cp]; | |
125 | int instride = ri->last_frame ->linesize[cp]; | |
126 | block_copy(ri->current_frame->data[cp] + y*outstride + x, | |
127 | ri->last_frame->data[cp] + my*instride + mx, | |
128 | outstride, instride, sz); | |
129 | } | |
130 | } | |
131 | ||
132 | ||
133 | void ff_apply_motion_4x4(RoqContext *ri, int x, int y, | |
134 | int deltax, int deltay) | |
135 | { | |
136 | apply_motion_generic(ri, x, y, deltax, deltay, 4); | |
137 | } | |
138 | ||
139 | void ff_apply_motion_8x8(RoqContext *ri, int x, int y, | |
140 | int deltax, int deltay) | |
141 | { | |
142 | apply_motion_generic(ri, x, y, deltax, deltay, 8); | |
143 | } |