blob: 8eda93c13cc93d4aba3812dc079aa1007fcceb0e
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 | } |
144 |