| /* |
| * 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 */ |
