Use FLG pseudo-random number generator in RoQ and ELBG
[libav.git] / libavcodec / roqvideo.h
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 #ifndef AVCODEC_ROQVIDEO_H
23 #define AVCODEC_ROQVIDEO_H
24
25 #include "libavutil/lfg.h"
26 #include "avcodec.h"
27 #include "dsputil.h"
28
29 typedef struct {
30 unsigned char y[4];
31 unsigned char u, v;
32 } roq_cell;
33
34 typedef struct {
35 int idx[4];
36 } roq_qcell;
37
38 typedef struct {
39 int d[2];
40 } motion_vect;
41
42 struct RoqTempData;
43
44 typedef struct RoqContext {
45
46 AVCodecContext *avctx;
47 DSPContext dsp;
48 AVFrame frames[2];
49 AVFrame *last_frame;
50 AVFrame *current_frame;
51 int first_frame;
52
53 roq_cell cb2x2[256];
54 roq_qcell cb4x4[256];
55
56 const unsigned char *buf;
57 int size;
58 int width, height;
59
60 /* Encoder only data */
61 AVLFG randctx;
62 uint64_t lambda;
63
64 motion_vect *this_motion4;
65 motion_vect *last_motion4;
66
67 motion_vect *this_motion8;
68 motion_vect *last_motion8;
69
70 unsigned int framesSinceKeyframe;
71
72 AVFrame *frame_to_enc;
73 uint8_t *out_buf;
74 struct RoqTempData *tmpData;
75 } RoqContext;
76
77 #define RoQ_INFO 0x1001
78 #define RoQ_QUAD_CODEBOOK 0x1002
79 #define RoQ_QUAD_VQ 0x1011
80 #define RoQ_SOUND_MONO 0x1020
81 #define RoQ_SOUND_STEREO 0x1021
82
83 #define RoQ_ID_MOT 0x00
84 #define RoQ_ID_FCC 0x01
85 #define RoQ_ID_SLD 0x02
86 #define RoQ_ID_CCC 0x03
87
88 void ff_apply_vector_2x2(RoqContext *ri, int x, int y, roq_cell *cell);
89 void ff_apply_vector_4x4(RoqContext *ri, int x, int y, roq_cell *cell);
90
91 void ff_apply_motion_4x4(RoqContext *ri, int x, int y, int deltax, int deltay);
92
93 void ff_apply_motion_8x8(RoqContext *ri, int x, int y, int deltax, int deltay);
94
95 #endif /* AVCODEC_ROQVIDEO_H */