yading@10: /* yading@10: * MJPEG encoder and decoder yading@10: * Copyright (c) 2000, 2001 Fabrice Bellard yading@10: * Copyright (c) 2003 Alex Beregszaszi yading@10: * Copyright (c) 2003-2004 Michael Niedermayer yading@10: * yading@10: * Support for external huffman table, various fixes (AVID workaround), yading@10: * aspecting, new decode_frame mechanism and apple mjpeg-b support yading@10: * by Alex Beregszaszi yading@10: * yading@10: * This file is part of FFmpeg. yading@10: * yading@10: * FFmpeg is free software; you can redistribute it and/or yading@10: * modify it under the terms of the GNU Lesser General Public yading@10: * License as published by the Free Software Foundation; either yading@10: * version 2.1 of the License, or (at your option) any later version. yading@10: * yading@10: * FFmpeg is distributed in the hope that it will be useful, yading@10: * but WITHOUT ANY WARRANTY; without even the implied warranty of yading@10: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU yading@10: * Lesser General Public License for more details. yading@10: * yading@10: * You should have received a copy of the GNU Lesser General Public yading@10: * License along with FFmpeg; if not, write to the Free Software yading@10: * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA yading@10: */ yading@10: yading@10: /** yading@10: * @file yading@10: * MJPEG encoder and decoder. yading@10: */ yading@10: yading@10: #ifndef AVCODEC_MJPEG_H yading@10: #define AVCODEC_MJPEG_H yading@10: yading@10: #include "avcodec.h" yading@10: #include "put_bits.h" yading@10: yading@10: yading@10: /* JPEG marker codes */ yading@10: typedef enum { yading@10: /* start of frame */ yading@10: SOF0 = 0xc0, /* baseline */ yading@10: SOF1 = 0xc1, /* extended sequential, huffman */ yading@10: SOF2 = 0xc2, /* progressive, huffman */ yading@10: SOF3 = 0xc3, /* lossless, huffman */ yading@10: yading@10: SOF5 = 0xc5, /* differential sequential, huffman */ yading@10: SOF6 = 0xc6, /* differential progressive, huffman */ yading@10: SOF7 = 0xc7, /* differential lossless, huffman */ yading@10: JPG = 0xc8, /* reserved for JPEG extension */ yading@10: SOF9 = 0xc9, /* extended sequential, arithmetic */ yading@10: SOF10 = 0xca, /* progressive, arithmetic */ yading@10: SOF11 = 0xcb, /* lossless, arithmetic */ yading@10: yading@10: SOF13 = 0xcd, /* differential sequential, arithmetic */ yading@10: SOF14 = 0xce, /* differential progressive, arithmetic */ yading@10: SOF15 = 0xcf, /* differential lossless, arithmetic */ yading@10: yading@10: DHT = 0xc4, /* define huffman tables */ yading@10: yading@10: DAC = 0xcc, /* define arithmetic-coding conditioning */ yading@10: yading@10: /* restart with modulo 8 count "m" */ yading@10: RST0 = 0xd0, yading@10: RST1 = 0xd1, yading@10: RST2 = 0xd2, yading@10: RST3 = 0xd3, yading@10: RST4 = 0xd4, yading@10: RST5 = 0xd5, yading@10: RST6 = 0xd6, yading@10: RST7 = 0xd7, yading@10: yading@10: SOI = 0xd8, /* start of image */ yading@10: EOI = 0xd9, /* end of image */ yading@10: SOS = 0xda, /* start of scan */ yading@10: DQT = 0xdb, /* define quantization tables */ yading@10: DNL = 0xdc, /* define number of lines */ yading@10: DRI = 0xdd, /* define restart interval */ yading@10: DHP = 0xde, /* define hierarchical progression */ yading@10: EXP = 0xdf, /* expand reference components */ yading@10: yading@10: APP0 = 0xe0, yading@10: APP1 = 0xe1, yading@10: APP2 = 0xe2, yading@10: APP3 = 0xe3, yading@10: APP4 = 0xe4, yading@10: APP5 = 0xe5, yading@10: APP6 = 0xe6, yading@10: APP7 = 0xe7, yading@10: APP8 = 0xe8, yading@10: APP9 = 0xe9, yading@10: APP10 = 0xea, yading@10: APP11 = 0xeb, yading@10: APP12 = 0xec, yading@10: APP13 = 0xed, yading@10: APP14 = 0xee, yading@10: APP15 = 0xef, yading@10: yading@10: JPG0 = 0xf0, yading@10: JPG1 = 0xf1, yading@10: JPG2 = 0xf2, yading@10: JPG3 = 0xf3, yading@10: JPG4 = 0xf4, yading@10: JPG5 = 0xf5, yading@10: JPG6 = 0xf6, yading@10: SOF48 = 0xf7, ///< JPEG-LS yading@10: LSE = 0xf8, ///< JPEG-LS extension parameters yading@10: JPG9 = 0xf9, yading@10: JPG10 = 0xfa, yading@10: JPG11 = 0xfb, yading@10: JPG12 = 0xfc, yading@10: JPG13 = 0xfd, yading@10: yading@10: COM = 0xfe, /* comment */ yading@10: yading@10: TEM = 0x01, /* temporary private use for arithmetic coding */ yading@10: yading@10: /* 0x02 -> 0xbf reserved */ yading@10: } JPEG_MARKER; yading@10: yading@10: static inline void put_marker(PutBitContext *p, int code) yading@10: { yading@10: put_bits(p, 8, 0xff); yading@10: put_bits(p, 8, code); yading@10: } yading@10: yading@10: #define PREDICT(ret, topleft, top, left, predictor)\ yading@10: switch(predictor){\ yading@10: case 0: ret= 0; break;\ yading@10: case 1: ret= left; break;\ yading@10: case 2: ret= top; break;\ yading@10: case 3: ret= topleft; break;\ yading@10: case 4: ret= left + top - topleft; break;\ yading@10: case 5: ret= left + ((top - topleft)>>1); break;\ yading@10: case 6: ret= top + ((left - topleft)>>1); break;\ yading@10: default:\ yading@10: case 7: ret= (left + top)>>1; break;\ yading@10: } yading@10: yading@10: extern av_export const uint8_t avpriv_mjpeg_bits_dc_luminance[]; yading@10: extern av_export const uint8_t avpriv_mjpeg_val_dc[]; yading@10: yading@10: extern av_export const uint8_t avpriv_mjpeg_bits_dc_chrominance[]; yading@10: yading@10: extern av_export const uint8_t avpriv_mjpeg_bits_ac_luminance[]; yading@10: extern av_export const uint8_t avpriv_mjpeg_val_ac_luminance[]; yading@10: yading@10: extern av_export const uint8_t avpriv_mjpeg_bits_ac_chrominance[]; yading@10: extern av_export const uint8_t avpriv_mjpeg_val_ac_chrominance[]; yading@10: yading@10: void ff_mjpeg_build_huffman_codes(uint8_t *huff_size, uint16_t *huff_code, yading@10: const uint8_t *bits_table, yading@10: const uint8_t *val_table); yading@10: yading@10: #endif /* AVCODEC_MJPEG_H */