mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-11-26 19:01:44 +02:00
973dc4e8d4
This requires adding includes to other files that relied on these being included implicitly.
157 lines
4.8 KiB
C
157 lines
4.8 KiB
C
/*
|
|
* 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 Libav.
|
|
*
|
|
* Libav 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.
|
|
*
|
|
* Libav 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 Libav; 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
|
|
|
|
#include "libavutil/internal.h"
|
|
|
|
#include "avcodec.h"
|
|
#include "put_bits.h"
|
|
|
|
/* JPEG marker codes */
|
|
typedef enum {
|
|
/* 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 */
|
|
} JPEG_MARKER;
|
|
|
|
static inline void put_marker(PutBitContext *p, int code)
|
|
{
|
|
put_bits(p, 8, 0xff);
|
|
put_bits(p, 8, code);
|
|
}
|
|
|
|
#define PREDICT(ret, topleft, top, left, predictor)\
|
|
switch(predictor){\
|
|
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;\
|
|
}
|
|
|
|
extern av_export const uint8_t avpriv_mjpeg_bits_dc_luminance[];
|
|
extern av_export const uint8_t avpriv_mjpeg_val_dc[];
|
|
|
|
extern av_export const uint8_t avpriv_mjpeg_bits_dc_chrominance[];
|
|
|
|
extern av_export const uint8_t avpriv_mjpeg_bits_ac_luminance[];
|
|
extern av_export const uint8_t avpriv_mjpeg_val_ac_luminance[];
|
|
|
|
extern av_export const uint8_t avpriv_mjpeg_bits_ac_chrominance[];
|
|
extern av_export const uint8_t avpriv_mjpeg_val_ac_chrominance[];
|
|
|
|
void ff_mjpeg_build_huffman_codes(uint8_t *huff_size, uint16_t *huff_code,
|
|
const uint8_t *bits_table,
|
|
const uint8_t *val_table);
|
|
|
|
#endif /* AVCODEC_MJPEG_H */
|