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huffyuv.h
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1 /*
2  * Copyright (c) 2002-2003 Michael Niedermayer <michaelni@gmx.at>
3  *
4  * see http://www.pcisys.net/~melanson/codecs/huffyuv.txt for a description of
5  * the algorithm used
6  *
7  * This file is part of FFmpeg.
8  *
9  * FFmpeg is free software; you can redistribute it and/or
10  * modify it under the terms of the GNU Lesser General Public
11  * License as published by the Free Software Foundation; either
12  * version 2.1 of the License, or (at your option) any later version.
13  *
14  * FFmpeg is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17  * Lesser General Public License for more details.
18  *
19  * You should have received a copy of the GNU Lesser General Public
20  * License along with FFmpeg; if not, write to the Free Software
21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22  */
23 
24 /**
25  * @file
26  * huffyuv codec for libavcodec.
27  */
28 
29 #ifndef AVCODEC_HUFFYUV_H
30 #define AVCODEC_HUFFYUV_H
31 
32 #include <stdint.h>
33 
34 #include "avcodec.h"
35 #include "dsputil.h"
36 #include "get_bits.h"
37 #include "put_bits.h"
38 
39 #define VLC_BITS 11
40 
41 #if HAVE_BIGENDIAN
42 #define B 3
43 #define G 2
44 #define R 1
45 #define A 0
46 #else
47 #define B 0
48 #define G 1
49 #define R 2
50 #define A 3
51 #endif
52 
53 typedef enum Predictor {
54  LEFT = 0,
57 } Predictor;
58 
59 typedef struct HYuvContext {
67  int version;
68  int yuy2; //use yuy2 instead of 422P
69  int bgr32; //use bgr32 instead of bgr24
70  int width, height;
71  int flags;
72  int context;
76  uint64_t stats[3][256];
77  uint8_t len[3][256];
78  uint32_t bits[3][256];
79  uint32_t pix_bgr_map[1<<VLC_BITS];
80  VLC vlc[6]; //Y,U,V,YY,YU,YV
82  unsigned int bitstream_buffer_size;
84 } HYuvContext;
85 
89 int ff_huffyuv_generate_bits_table(uint32_t *dst, const uint8_t *len_table);
90 
91 #endif /* AVCODEC_HUFFYUV_H */