53d60a19eb9f18535b535fa0cf2c2ef4d6ae3123
[libav.git] / libavcodec / roqvideo.c
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 roqvideo.c
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 for(cp = 0; cp < 3; cp++) {
119 int outstride = ri->current_frame->linesize[cp];
120 int instride = ri->last_frame ->linesize[cp];
121 block_copy(ri->current_frame->data[cp] + y*outstride + x,
122 ri->last_frame->data[cp] + my*instride + mx,
123 outstride, instride, sz);
124 }
125 }
126
127
128 void ff_apply_motion_4x4(RoqContext *ri, int x, int y,
129 int deltax, int deltay)
130 {
131 apply_motion_generic(ri, x, y, deltax, deltay, 4);
132 }
133
134 void ff_apply_motion_8x8(RoqContext *ri, int x, int y,
135 int deltax, int deltay)
136 {
137 apply_motion_generic(ri, x, y, deltax, deltay, 8);
138 }