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- /*
- * 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 */
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