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 */ 42typedef 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 123static 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 142extern av_export const uint8_t avpriv_mjpeg_bits_dc_luminance[]; 143extern av_export const uint8_t avpriv_mjpeg_val_dc[]; 144 145extern av_export const uint8_t avpriv_mjpeg_bits_dc_chrominance[]; 146 147extern av_export const uint8_t avpriv_mjpeg_bits_ac_luminance[]; 148extern av_export const uint8_t avpriv_mjpeg_val_ac_luminance[]; 149 150extern av_export const uint8_t avpriv_mjpeg_bits_ac_chrominance[]; 151extern av_export const uint8_t avpriv_mjpeg_val_ac_chrominance[]; 152 153void 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 */ 158