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156 lines
4.7 KiB
156 lines
4.7 KiB
/* |
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* MJPEG encoder and decoder |
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* Copyright (c) 2000, 2001 Fabrice Bellard |
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* Copyright (c) 2003 Alex Beregszaszi |
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* Copyright (c) 2003-2004 Michael Niedermayer |
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* |
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* Support for external huffman table, various fixes (AVID workaround), |
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* aspecting, new decode_frame mechanism and apple mjpeg-b support |
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* by Alex Beregszaszi |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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/** |
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* @file |
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* MJPEG encoder and decoder. |
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*/ |
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#ifndef AVCODEC_MJPEG_H |
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#define AVCODEC_MJPEG_H |
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#include "avcodec.h" |
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#include "put_bits.h" |
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/* JPEG marker codes */ |
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typedef enum { |
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/* start of frame */ |
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SOF0 = 0xc0, /* baseline */ |
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SOF1 = 0xc1, /* extended sequential, huffman */ |
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SOF2 = 0xc2, /* progressive, huffman */ |
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SOF3 = 0xc3, /* lossless, huffman */ |
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SOF5 = 0xc5, /* differential sequential, huffman */ |
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SOF6 = 0xc6, /* differential progressive, huffman */ |
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SOF7 = 0xc7, /* differential lossless, huffman */ |
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JPG = 0xc8, /* reserved for JPEG extension */ |
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SOF9 = 0xc9, /* extended sequential, arithmetic */ |
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SOF10 = 0xca, /* progressive, arithmetic */ |
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SOF11 = 0xcb, /* lossless, arithmetic */ |
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SOF13 = 0xcd, /* differential sequential, arithmetic */ |
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SOF14 = 0xce, /* differential progressive, arithmetic */ |
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SOF15 = 0xcf, /* differential lossless, arithmetic */ |
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DHT = 0xc4, /* define huffman tables */ |
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DAC = 0xcc, /* define arithmetic-coding conditioning */ |
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/* restart with modulo 8 count "m" */ |
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RST0 = 0xd0, |
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RST1 = 0xd1, |
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RST2 = 0xd2, |
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RST3 = 0xd3, |
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RST4 = 0xd4, |
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RST5 = 0xd5, |
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RST6 = 0xd6, |
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RST7 = 0xd7, |
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SOI = 0xd8, /* start of image */ |
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EOI = 0xd9, /* end of image */ |
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SOS = 0xda, /* start of scan */ |
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DQT = 0xdb, /* define quantization tables */ |
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DNL = 0xdc, /* define number of lines */ |
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DRI = 0xdd, /* define restart interval */ |
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DHP = 0xde, /* define hierarchical progression */ |
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EXP = 0xdf, /* expand reference components */ |
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APP0 = 0xe0, |
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APP1 = 0xe1, |
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APP2 = 0xe2, |
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APP3 = 0xe3, |
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APP4 = 0xe4, |
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APP5 = 0xe5, |
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APP6 = 0xe6, |
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APP7 = 0xe7, |
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APP8 = 0xe8, |
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APP9 = 0xe9, |
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APP10 = 0xea, |
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APP11 = 0xeb, |
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APP12 = 0xec, |
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APP13 = 0xed, |
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APP14 = 0xee, |
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APP15 = 0xef, |
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JPG0 = 0xf0, |
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JPG1 = 0xf1, |
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JPG2 = 0xf2, |
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JPG3 = 0xf3, |
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JPG4 = 0xf4, |
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JPG5 = 0xf5, |
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JPG6 = 0xf6, |
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SOF48 = 0xf7, ///< JPEG-LS |
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LSE = 0xf8, ///< JPEG-LS extension parameters |
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JPG9 = 0xf9, |
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JPG10 = 0xfa, |
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JPG11 = 0xfb, |
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JPG12 = 0xfc, |
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JPG13 = 0xfd, |
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COM = 0xfe, /* comment */ |
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TEM = 0x01, /* temporary private use for arithmetic coding */ |
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/* 0x02 -> 0xbf reserved */ |
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} JPEG_MARKER; |
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static inline void put_marker(PutBitContext *p, int code) |
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{ |
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put_bits(p, 8, 0xff); |
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put_bits(p, 8, code); |
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} |
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#define PREDICT(ret, topleft, top, left, predictor)\ |
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switch(predictor){\ |
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case 0: ret= 0; break;\ |
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case 1: ret= left; break;\ |
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case 2: ret= top; break;\ |
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case 3: ret= topleft; break;\ |
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case 4: ret= left + top - topleft; break;\ |
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case 5: ret= left + ((top - topleft)>>1); break;\ |
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case 6: ret= top + ((left - topleft)>>1); break;\ |
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default:\ |
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case 7: ret= (left + top)>>1; break;\ |
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} |
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extern const uint8_t avpriv_mjpeg_bits_dc_luminance[]; |
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extern const uint8_t avpriv_mjpeg_val_dc[]; |
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extern const uint8_t avpriv_mjpeg_bits_dc_chrominance[]; |
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extern const uint8_t avpriv_mjpeg_bits_ac_luminance[]; |
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extern const uint8_t avpriv_mjpeg_val_ac_luminance[]; |
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extern const uint8_t avpriv_mjpeg_bits_ac_chrominance[]; |
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extern const uint8_t avpriv_mjpeg_val_ac_chrominance[]; |
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void ff_mjpeg_build_huffman_codes(uint8_t *huff_size, uint16_t *huff_code, |
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const uint8_t *bits_table, |
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const uint8_t *val_table); |
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#endif /* AVCODEC_MJPEG_H */
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