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
7 * Support for external huffman table, various fixes (AVID workaround),
8 * aspecting, new decode_frame mechanism and apple mjpeg-b support
11 * This file is part of FFmpeg.
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.
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.
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
30 * MJPEG encoder and decoder.
33 #ifndef AVCODEC_MJPEG_H
34 #define AVCODEC_MJPEG_H
36 /* JPEG marker codes */
39 SOF0 = 0xc0, /* baseline */
40 SOF1 = 0xc1, /* extended sequential, huffman */
41 SOF2 = 0xc2, /* progressive, huffman */
42 SOF3 = 0xc3, /* lossless, huffman */
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 */
52 SOF13 = 0xcd, /* differential sequential, arithmetic */
53 SOF14 = 0xce, /* differential progressive, arithmetic */
54 SOF15 = 0xcf, /* differential lossless, arithmetic */
56 DHT = 0xc4, /* define huffman tables */
58 DAC = 0xcc, /* define arithmetic-coding conditioning */
60 /* restart with modulo 8 count "m" */
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 */
103 SOF48 = 0xf7, ///< JPEG-LS
104 LSE = 0xf8, ///< JPEG-LS extension parameters
111 COM = 0xfe, /* comment */
113 TEM = 0x01, /* temporary private use for arithmetic coding */
115 /* 0x02 -> 0xbf reserved */
118 #define PREDICT(ret, topleft, top, left, predictor)\
120 case 0: ret= 0; break;\
121 case 1: ret= left; break;\
122 case 2: ret= top; break;\
123 case 3: ret= topleft; break;\
124 case 4: ret= left + top - topleft; break;\
125 case 5: ret= left + ((top - topleft)>>1); break;\
126 case 6: ret= top + ((left - topleft)>>1); break;\
128 case 7: ret= (left + top)>>1; break;\
131 #endif /* AVCODEC_MJPEG_H */