build: Split JPEG-related tables off into a separate component
[libav.git] / 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 Libav.
12 *
13 * Libav 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 * Libav 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 Libav; 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 /* JPEG marker codes */
37 enum JpegMarker {
38 /* start of frame */
39 SOF0 = 0xc0, /* baseline */
40 SOF1 = 0xc1, /* extended sequential, huffman */
41 SOF2 = 0xc2, /* progressive, huffman */
42 SOF3 = 0xc3, /* lossless, huffman */
43
44 SOF5 = 0xc5, /* differential sequential, huffman */
45 SOF6 = 0xc6, /* differential progressive, huffman */
46 SOF7 = 0xc7, /* differential lossless, huffman */
47 JPG = 0xc8, /* reserved for JPEG extension */
48 SOF9 = 0xc9, /* extended sequential, arithmetic */
49 SOF10 = 0xca, /* progressive, arithmetic */
50 SOF11 = 0xcb, /* lossless, arithmetic */
51
52 SOF13 = 0xcd, /* differential sequential, arithmetic */
53 SOF14 = 0xce, /* differential progressive, arithmetic */
54 SOF15 = 0xcf, /* differential lossless, arithmetic */
55
56 DHT = 0xc4, /* define huffman tables */
57
58 DAC = 0xcc, /* define arithmetic-coding conditioning */
59
60 /* restart with modulo 8 count "m" */
61 RST0 = 0xd0,
62 RST1 = 0xd1,
63 RST2 = 0xd2,
64 RST3 = 0xd3,
65 RST4 = 0xd4,
66 RST5 = 0xd5,
67 RST6 = 0xd6,
68 RST7 = 0xd7,
69
70 SOI = 0xd8, /* start of image */
71 EOI = 0xd9, /* end of image */
72 SOS = 0xda, /* start of scan */
73 DQT = 0xdb, /* define quantization tables */
74 DNL = 0xdc, /* define number of lines */
75 DRI = 0xdd, /* define restart interval */
76 DHP = 0xde, /* define hierarchical progression */
77 EXP = 0xdf, /* expand reference components */
78
79 APP0 = 0xe0,
80 APP1 = 0xe1,
81 APP2 = 0xe2,
82 APP3 = 0xe3,
83 APP4 = 0xe4,
84 APP5 = 0xe5,
85 APP6 = 0xe6,
86 APP7 = 0xe7,
87 APP8 = 0xe8,
88 APP9 = 0xe9,
89 APP10 = 0xea,
90 APP11 = 0xeb,
91 APP12 = 0xec,
92 APP13 = 0xed,
93 APP14 = 0xee,
94 APP15 = 0xef,
95
96 JPG0 = 0xf0,
97 JPG1 = 0xf1,
98 JPG2 = 0xf2,
99 JPG3 = 0xf3,
100 JPG4 = 0xf4,
101 JPG5 = 0xf5,
102 JPG6 = 0xf6,
103 SOF48 = 0xf7, ///< JPEG-LS
104 LSE = 0xf8, ///< JPEG-LS extension parameters
105 JPG9 = 0xf9,
106 JPG10 = 0xfa,
107 JPG11 = 0xfb,
108 JPG12 = 0xfc,
109 JPG13 = 0xfd,
110
111 COM = 0xfe, /* comment */
112
113 TEM = 0x01, /* temporary private use for arithmetic coding */
114
115 /* 0x02 -> 0xbf reserved */
116 };
117
118 #define PREDICT(ret, topleft, top, left, predictor)\
119 switch(predictor){\
120 case 1: ret= left; break;\
121 case 2: ret= top; break;\
122 case 3: ret= topleft; break;\
123 case 4: ret= left + top - topleft; break;\
124 case 5: ret= left + ((top - topleft)>>1); break;\
125 case 6: ret= top + ((left - topleft)>>1); break;\
126 default:\
127 case 7: ret= (left + top)>>1; break;\
128 }
129
130 #endif /* AVCODEC_MJPEG_H */