From 6ba04c2b033942a66ee2af5fde67e091febd9aaa Mon Sep 17 00:00:00 2001 From: Aurelien Jacobs Date: Sun, 13 May 2007 23:16:56 +0000 Subject: split jpeg_ls into jpeglsdec, jpeglsenc and jpegls Originally committed as revision 9021 to svn://svn.ffmpeg.org/ffmpeg/trunk --- libavcodec/mjpeg.h | 195 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 195 insertions(+) create mode 100644 libavcodec/mjpeg.h (limited to 'libavcodec/mjpeg.h') diff --git a/libavcodec/mjpeg.h b/libavcodec/mjpeg.h new file mode 100644 index 0000000000..ab546edd18 --- /dev/null +++ b/libavcodec/mjpeg.h @@ -0,0 +1,195 @@ +/* + * MJPEG encoder and decoder + * Copyright (c) 2000, 2001 Fabrice Bellard. + * Copyright (c) 2003 Alex Beregszaszi + * Copyright (c) 2003-2004 Michael Niedermayer + * + * 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 + * + * Support for external huffman table, various fixes (AVID workaround), + * aspecting, new decode_frame mechanism and apple mjpeg-b support + * by Alex Beregszaszi + */ + +/** + * @file mjpeg.h + * MJPEG encoder and decoder. + */ + +#ifndef MJPEG_H +#define MJPEG_H + +#include "avcodec.h" +#include "bitstream.h" +#include "dsputil.h" +#include "mpegvideo.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 MAX_COMPONENTS 4 + +typedef struct MJpegDecodeContext { + AVCodecContext *avctx; + GetBitContext gb; + + int start_code; /* current start code */ + int buffer_size; + uint8_t *buffer; + + int16_t quant_matrixes[4][64]; + VLC vlcs[2][4]; + int qscale[4]; ///< quantizer scale calculated from quant_matrixes + + int org_height; /* size given at codec init */ + int first_picture; /* true if decoding first picture */ + int interlaced; /* true if interlaced */ + int bottom_field; /* true if bottom field */ + int lossless; + int ls; + int progressive; + int rgb; + int rct; /* standard rct */ + int pegasus_rct; /* pegasus reversible colorspace transform */ + int bits; /* bits per component */ + + int maxval; + int near; ///< near lossless bound (si 0 for lossless) + int t1,t2,t3; + int reset; ///< context halfing intervall ?rename + + int width, height; + int mb_width, mb_height; + int nb_components; + int component_id[MAX_COMPONENTS]; + int h_count[MAX_COMPONENTS]; /* horizontal and vertical count for each component */ + int v_count[MAX_COMPONENTS]; + int comp_index[MAX_COMPONENTS]; + int dc_index[MAX_COMPONENTS]; + int ac_index[MAX_COMPONENTS]; + int nb_blocks[MAX_COMPONENTS]; + int h_scount[MAX_COMPONENTS]; + int v_scount[MAX_COMPONENTS]; + int h_max, v_max; /* maximum h and v counts */ + int quant_index[4]; /* quant table index for each component */ + int last_dc[MAX_COMPONENTS]; /* last DEQUANTIZED dc (XXX: am I right to do that ?) */ + AVFrame picture; /* picture structure */ + int linesize[MAX_COMPONENTS]; ///< linesize << interlaced + int8_t *qscale_table; + DECLARE_ALIGNED_8(DCTELEM, block[64]); + ScanTable scantable; + DSPContext dsp; + + int restart_interval; + int restart_count; + + int buggy_avid; + int cs_itu601; + int interlace_polarity; + + int mjpb_skiptosod; + + int cur_scan; /* current scan, used by JPEG-LS */ +} MJpegDecodeContext; + +#endif /* MJPEG_H */ -- cgit v1.2.3