Imported Debian version 2.5.0~trusty1.1
[deb_ffmpeg.git] / ffmpeg / libavcodec / mjpeg.h
1 /*
2 * MJPEG encoder and decoder
3 * Copyright (c) 2000, 2001 Fabrice Bellard
4 * Copyright (c) 2003 Alex Beregszaszi
5 * Copyright (c) 2003-2004 Michael Niedermayer
6 *
7 * Support for external huffman table, various fixes (AVID workaround),
8 * aspecting, new decode_frame mechanism and apple mjpeg-b support
9 * by Alex Beregszaszi
10 *
11 * This file is part of FFmpeg.
12 *
13 * FFmpeg is free software; you can redistribute it and/or
14 * modify it under the terms of the GNU Lesser General Public
15 * License as published by the Free Software Foundation; either
16 * version 2.1 of the License, or (at your option) any later version.
17 *
18 * FFmpeg is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
21 * Lesser General Public License for more details.
22 *
23 * You should have received a copy of the GNU Lesser General Public
24 * License along with FFmpeg; if not, write to the Free Software
25 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
26 */
27
28 /**
29 * @file
30 * MJPEG encoder and decoder.
31 */
32
33 #ifndef AVCODEC_MJPEG_H
34 #define AVCODEC_MJPEG_H
35
36 #include "libavutil/internal.h"
37
38 #include "avcodec.h"
39 #include "put_bits.h"
40
41 /* JPEG marker codes */
42 typedef enum {
43 /* start of frame */
44 SOF0 = 0xc0, /* baseline */
45 SOF1 = 0xc1, /* extended sequential, huffman */
46 SOF2 = 0xc2, /* progressive, huffman */
47 SOF3 = 0xc3, /* lossless, huffman */
48
49 SOF5 = 0xc5, /* differential sequential, huffman */
50 SOF6 = 0xc6, /* differential progressive, huffman */
51 SOF7 = 0xc7, /* differential lossless, huffman */
52 JPG = 0xc8, /* reserved for JPEG extension */
53 SOF9 = 0xc9, /* extended sequential, arithmetic */
54 SOF10 = 0xca, /* progressive, arithmetic */
55 SOF11 = 0xcb, /* lossless, arithmetic */
56
57 SOF13 = 0xcd, /* differential sequential, arithmetic */
58 SOF14 = 0xce, /* differential progressive, arithmetic */
59 SOF15 = 0xcf, /* differential lossless, arithmetic */
60
61 DHT = 0xc4, /* define huffman tables */
62
63 DAC = 0xcc, /* define arithmetic-coding conditioning */
64
65 /* restart with modulo 8 count "m" */
66 RST0 = 0xd0,
67 RST1 = 0xd1,
68 RST2 = 0xd2,
69 RST3 = 0xd3,
70 RST4 = 0xd4,
71 RST5 = 0xd5,
72 RST6 = 0xd6,
73 RST7 = 0xd7,
74
75 SOI = 0xd8, /* start of image */
76 EOI = 0xd9, /* end of image */
77 SOS = 0xda, /* start of scan */
78 DQT = 0xdb, /* define quantization tables */
79 DNL = 0xdc, /* define number of lines */
80 DRI = 0xdd, /* define restart interval */
81 DHP = 0xde, /* define hierarchical progression */
82 EXP = 0xdf, /* expand reference components */
83
84 APP0 = 0xe0,
85 APP1 = 0xe1,
86 APP2 = 0xe2,
87 APP3 = 0xe3,
88 APP4 = 0xe4,
89 APP5 = 0xe5,
90 APP6 = 0xe6,
91 APP7 = 0xe7,
92 APP8 = 0xe8,
93 APP9 = 0xe9,
94 APP10 = 0xea,
95 APP11 = 0xeb,
96 APP12 = 0xec,
97 APP13 = 0xed,
98 APP14 = 0xee,
99 APP15 = 0xef,
100
101 JPG0 = 0xf0,
102 JPG1 = 0xf1,
103 JPG2 = 0xf2,
104 JPG3 = 0xf3,
105 JPG4 = 0xf4,
106 JPG5 = 0xf5,
107 JPG6 = 0xf6,
108 SOF48 = 0xf7, ///< JPEG-LS
109 LSE = 0xf8, ///< JPEG-LS extension parameters
110 JPG9 = 0xf9,
111 JPG10 = 0xfa,
112 JPG11 = 0xfb,
113 JPG12 = 0xfc,
114 JPG13 = 0xfd,
115
116 COM = 0xfe, /* comment */
117
118 TEM = 0x01, /* temporary private use for arithmetic coding */
119
120 /* 0x02 -> 0xbf reserved */
121 } JPEG_MARKER;
122
123 static inline void put_marker(PutBitContext *p, int code)
124 {
125 put_bits(p, 8, 0xff);
126 put_bits(p, 8, code);
127 }
128
129 #define PREDICT(ret, topleft, top, left, predictor)\
130 switch(predictor){\
131 case 0: ret= 0; break;\
132 case 1: ret= left; break;\
133 case 2: ret= top; break;\
134 case 3: ret= topleft; break;\
135 case 4: ret= left + top - topleft; break;\
136 case 5: ret= left + ((top - topleft)>>1); break;\
137 case 6: ret= top + ((left - topleft)>>1); break;\
138 default:\
139 case 7: ret= (left + top)>>1; break;\
140 }
141
142 extern av_export const uint8_t avpriv_mjpeg_bits_dc_luminance[];
143 extern av_export const uint8_t avpriv_mjpeg_val_dc[];
144
145 extern av_export const uint8_t avpriv_mjpeg_bits_dc_chrominance[];
146
147 extern av_export const uint8_t avpriv_mjpeg_bits_ac_luminance[];
148 extern av_export const uint8_t avpriv_mjpeg_val_ac_luminance[];
149
150 extern av_export const uint8_t avpriv_mjpeg_bits_ac_chrominance[];
151 extern av_export const uint8_t avpriv_mjpeg_val_ac_chrominance[];
152
153 void ff_mjpeg_build_huffman_codes(uint8_t *huff_size, uint16_t *huff_code,
154 const uint8_t *bits_table,
155 const uint8_t *val_table);
156
157 #endif /* AVCODEC_MJPEG_H */