e63b314dea36574cb98d4763b223e3bc966a9646
[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 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 mjpeg.h
30 * MJPEG encoder and decoder.
31 */
32
33 #ifndef MJPEG_H
34 #define MJPEG_H
35
36 #include "avcodec.h"
37 #include "bitstream.h"
38
39
40 /* JPEG marker codes */
41 typedef enum {
42 /* start of frame */
43 SOF0 = 0xc0, /* baseline */
44 SOF1 = 0xc1, /* extended sequential, huffman */
45 SOF2 = 0xc2, /* progressive, huffman */
46 SOF3 = 0xc3, /* lossless, huffman */
47
48 SOF5 = 0xc5, /* differential sequential, huffman */
49 SOF6 = 0xc6, /* differential progressive, huffman */
50 SOF7 = 0xc7, /* differential lossless, huffman */
51 JPG = 0xc8, /* reserved for JPEG extension */
52 SOF9 = 0xc9, /* extended sequential, arithmetic */
53 SOF10 = 0xca, /* progressive, arithmetic */
54 SOF11 = 0xcb, /* lossless, arithmetic */
55
56 SOF13 = 0xcd, /* differential sequential, arithmetic */
57 SOF14 = 0xce, /* differential progressive, arithmetic */
58 SOF15 = 0xcf, /* differential lossless, arithmetic */
59
60 DHT = 0xc4, /* define huffman tables */
61
62 DAC = 0xcc, /* define arithmetic-coding conditioning */
63
64 /* restart with modulo 8 count "m" */
65 RST0 = 0xd0,
66 RST1 = 0xd1,
67 RST2 = 0xd2,
68 RST3 = 0xd3,
69 RST4 = 0xd4,
70 RST5 = 0xd5,
71 RST6 = 0xd6,
72 RST7 = 0xd7,
73
74 SOI = 0xd8, /* start of image */
75 EOI = 0xd9, /* end of image */
76 SOS = 0xda, /* start of scan */
77 DQT = 0xdb, /* define quantization tables */
78 DNL = 0xdc, /* define number of lines */
79 DRI = 0xdd, /* define restart interval */
80 DHP = 0xde, /* define hierarchical progression */
81 EXP = 0xdf, /* expand reference components */
82
83 APP0 = 0xe0,
84 APP1 = 0xe1,
85 APP2 = 0xe2,
86 APP3 = 0xe3,
87 APP4 = 0xe4,
88 APP5 = 0xe5,
89 APP6 = 0xe6,
90 APP7 = 0xe7,
91 APP8 = 0xe8,
92 APP9 = 0xe9,
93 APP10 = 0xea,
94 APP11 = 0xeb,
95 APP12 = 0xec,
96 APP13 = 0xed,
97 APP14 = 0xee,
98 APP15 = 0xef,
99
100 JPG0 = 0xf0,
101 JPG1 = 0xf1,
102 JPG2 = 0xf2,
103 JPG3 = 0xf3,
104 JPG4 = 0xf4,
105 JPG5 = 0xf5,
106 JPG6 = 0xf6,
107 SOF48 = 0xf7, ///< JPEG-LS
108 LSE = 0xf8, ///< JPEG-LS extension parameters
109 JPG9 = 0xf9,
110 JPG10 = 0xfa,
111 JPG11 = 0xfb,
112 JPG12 = 0xfc,
113 JPG13 = 0xfd,
114
115 COM = 0xfe, /* comment */
116
117 TEM = 0x01, /* temporary private use for arithmetic coding */
118
119 /* 0x02 -> 0xbf reserved */
120 } JPEG_MARKER;
121
122 static inline void put_marker(PutBitContext *p, int code)
123 {
124 put_bits(p, 8, 0xff);
125 put_bits(p, 8, code);
126 }
127
128 #define PREDICT(ret, topleft, top, left, predictor)\
129 switch(predictor){\
130 case 1: ret= left; break;\
131 case 2: ret= top; break;\
132 case 3: ret= topleft; break;\
133 case 4: ret= left + top - topleft; break;\
134 case 5: ret= left + ((top - topleft)>>1); break;\
135 case 6: ret= top + ((left - topleft)>>1); break;\
136 default:\
137 case 7: ret= (left + top)>>1; break;\
138 }
139
140 extern const uint8_t ff_mjpeg_bits_dc_luminance[];
141 extern const uint8_t ff_mjpeg_val_dc_luminance[];
142
143 extern const uint8_t ff_mjpeg_bits_dc_chrominance[];
144 extern const uint8_t ff_mjpeg_val_dc_chrominance[];
145
146 extern const uint8_t ff_mjpeg_bits_ac_luminance[];
147 extern const uint8_t ff_mjpeg_val_ac_luminance[];
148
149 extern const uint8_t ff_mjpeg_bits_ac_chrominance[];
150 extern const uint8_t ff_mjpeg_val_ac_chrominance[];
151
152 void ff_mjpeg_build_huffman_codes(uint8_t *huff_size, uint16_t *huff_code,
153 const uint8_t *bits_table,
154 const uint8_t *val_table);
155
156 #endif /* MJPEG_H */