nest-open-source / manifest_repos / ffmpeg / 62cf23d89db2251203d6207e2261ddc5498167c6 / . / libavcodec / mjpeg.h

/* | |

* MJPEG encoder and decoder | |

* Copyright (c) 2000, 2001 Fabrice Bellard | |

* Copyright (c) 2003 Alex Beregszaszi | |

* Copyright (c) 2003-2004 Michael Niedermayer | |

* | |

* Support for external huffman table, various fixes (AVID workaround), | |

* aspecting, new decode_frame mechanism and apple mjpeg-b support | |

* by Alex Beregszaszi | |

* | |

* This file is part of FFmpeg. | |

* | |

* FFmpeg is free software; you can redistribute it and/or | |

* modify it under the terms of the GNU Lesser General Public | |

* License as published by the Free Software Foundation; either | |

* version 2.1 of the License, or (at your option) any later version. | |

* | |

* FFmpeg is distributed in the hope that it will be useful, | |

* but WITHOUT ANY WARRANTY; without even the implied warranty of | |

* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |

* Lesser General Public License for more details. | |

* | |

* You should have received a copy of the GNU Lesser General Public | |

* License along with FFmpeg; if not, write to the Free Software | |

* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |

*/ | |

/** | |

* @file | |

* MJPEG encoder and decoder. | |

*/ | |

#ifndef AVCODEC_MJPEG_H | |

#define AVCODEC_MJPEG_H | |

/* JPEG marker codes */ | |

enum JpegMarker { | |

/* start of frame */ | |

SOF0 = 0xc0, /* baseline */ | |

SOF1 = 0xc1, /* extended sequential, huffman */ | |

SOF2 = 0xc2, /* progressive, huffman */ | |

SOF3 = 0xc3, /* lossless, huffman */ | |

SOF5 = 0xc5, /* differential sequential, huffman */ | |

SOF6 = 0xc6, /* differential progressive, huffman */ | |

SOF7 = 0xc7, /* differential lossless, huffman */ | |

JPG = 0xc8, /* reserved for JPEG extension */ | |

SOF9 = 0xc9, /* extended sequential, arithmetic */ | |

SOF10 = 0xca, /* progressive, arithmetic */ | |

SOF11 = 0xcb, /* lossless, arithmetic */ | |

SOF13 = 0xcd, /* differential sequential, arithmetic */ | |

SOF14 = 0xce, /* differential progressive, arithmetic */ | |

SOF15 = 0xcf, /* differential lossless, arithmetic */ | |

DHT = 0xc4, /* define huffman tables */ | |

DAC = 0xcc, /* define arithmetic-coding conditioning */ | |

/* restart with modulo 8 count "m" */ | |

RST0 = 0xd0, | |

RST1 = 0xd1, | |

RST2 = 0xd2, | |

RST3 = 0xd3, | |

RST4 = 0xd4, | |

RST5 = 0xd5, | |

RST6 = 0xd6, | |

RST7 = 0xd7, | |

SOI = 0xd8, /* start of image */ | |

EOI = 0xd9, /* end of image */ | |

SOS = 0xda, /* start of scan */ | |

DQT = 0xdb, /* define quantization tables */ | |

DNL = 0xdc, /* define number of lines */ | |

DRI = 0xdd, /* define restart interval */ | |

DHP = 0xde, /* define hierarchical progression */ | |

EXP = 0xdf, /* expand reference components */ | |

APP0 = 0xe0, | |

APP1 = 0xe1, | |

APP2 = 0xe2, | |

APP3 = 0xe3, | |

APP4 = 0xe4, | |

APP5 = 0xe5, | |

APP6 = 0xe6, | |

APP7 = 0xe7, | |

APP8 = 0xe8, | |

APP9 = 0xe9, | |

APP10 = 0xea, | |

APP11 = 0xeb, | |

APP12 = 0xec, | |

APP13 = 0xed, | |

APP14 = 0xee, | |

APP15 = 0xef, | |

JPG0 = 0xf0, | |

JPG1 = 0xf1, | |

JPG2 = 0xf2, | |

JPG3 = 0xf3, | |

JPG4 = 0xf4, | |

JPG5 = 0xf5, | |

JPG6 = 0xf6, | |

SOF48 = 0xf7, ///< JPEG-LS | |

LSE = 0xf8, ///< JPEG-LS extension parameters | |

JPG9 = 0xf9, | |

JPG10 = 0xfa, | |

JPG11 = 0xfb, | |

JPG12 = 0xfc, | |

JPG13 = 0xfd, | |

COM = 0xfe, /* comment */ | |

TEM = 0x01, /* temporary private use for arithmetic coding */ | |

/* 0x02 -> 0xbf reserved */ | |

}; | |

#define PREDICT(ret, topleft, top, left, predictor)\ | |

switch(predictor){\ | |

case 0: ret= 0; break;\ | |

case 1: ret= left; break;\ | |

case 2: ret= top; break;\ | |

case 3: ret= topleft; break;\ | |

case 4: ret= left + top - topleft; break;\ | |

case 5: ret= left + ((top - topleft)>>1); break;\ | |

case 6: ret= top + ((left - topleft)>>1); break;\ | |

default:\ | |

case 7: ret= (left + top)>>1; break;\ | |

} | |

#endif /* AVCODEC_MJPEG_H */ |