0,0 → 1,156 |
/* |
* 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 |
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#include "avcodec.h" |
#include "put_bits.h" |
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/* JPEG marker codes */ |
typedef enum { |
/* start of frame */ |
SOF0 = 0xc0, /* baseline */ |
SOF1 = 0xc1, /* extended sequential, huffman */ |
SOF2 = 0xc2, /* progressive, huffman */ |
SOF3 = 0xc3, /* lossless, huffman */ |
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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 */ |
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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" */ |
RST0 = 0xd0, |
RST1 = 0xd1, |
RST2 = 0xd2, |
RST3 = 0xd3, |
RST4 = 0xd4, |
RST5 = 0xd5, |
RST6 = 0xd6, |
RST7 = 0xd7, |
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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 */ |
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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, |
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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 */ |
} JPEG_MARKER; |
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static inline void put_marker(PutBitContext *p, int code) |
{ |
put_bits(p, 8, 0xff); |
put_bits(p, 8, code); |
} |
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#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;\ |
} |
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extern av_export const uint8_t avpriv_mjpeg_bits_dc_luminance[]; |
extern av_export const uint8_t avpriv_mjpeg_val_dc[]; |
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extern av_export const uint8_t avpriv_mjpeg_bits_dc_chrominance[]; |
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extern av_export const uint8_t avpriv_mjpeg_bits_ac_luminance[]; |
extern av_export const uint8_t avpriv_mjpeg_val_ac_luminance[]; |
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extern av_export const uint8_t avpriv_mjpeg_bits_ac_chrominance[]; |
extern av_export 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, |
const uint8_t *bits_table, |
const uint8_t *val_table); |
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#endif /* AVCODEC_MJPEG_H */ |