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huffyuv.h
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1 /*
2  * Copyright (c) 2002-2014 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 #include "lossless_videodsp.h"
39 
40 #define VLC_BITS 11
41 
42 #define MAX_BITS 16
43 #define MAX_N (1<<MAX_BITS)
44 #define MAX_VLC_N 16384
45 
46 #if HAVE_BIGENDIAN
47 #define B 3
48 #define G 2
49 #define R 1
50 #define A 0
51 #else
52 #define B 0
53 #define G 1
54 #define R 2
55 #define A 3
56 #endif
57 
58 typedef enum Predictor {
59  LEFT = 0,
62 } Predictor;
63 
64 typedef struct HYuvContext {
72  int version;
73  int yuy2; //use yuy2 instead of 422P
74  int bgr32; //use bgr32 instead of bgr24
75  int bps;
76  int n; // 1<<bps
77  int vlc_n; // number of vlc codes (FFMIN(1<<bps, MAX_VLC_N))
78  int alpha;
79  int chroma;
80  int yuv;
83  int width, height;
84  int flags;
85  int context;
89  uint16_t *temp16[3]; ///< identical to temp but 16bit type
90  uint64_t stats[4][MAX_VLC_N];
92  uint32_t bits[4][MAX_VLC_N];
93  uint32_t pix_bgr_map[1<<VLC_BITS];
94  VLC vlc[8]; //Y,U,V,A,YY,YU,YV,AA
96  unsigned int bitstream_buffer_size;
99 } HYuvContext;
100 
104 int ff_huffyuv_generate_bits_table(uint32_t *dst, const uint8_t *len_table, int n);
105 
106 #endif /* AVCODEC_HUFFYUV_H */