739a7ae0e9
Change-Id: I520c14131ec1e12013f106c13cba00aac058ad83 Reviewed-on: http://gerrit.rockbox.org/391 Reviewed-by: Dominik Riebeling <Dominik.Riebeling@gmail.com>
118 lines
3.4 KiB
C
118 lines
3.4 KiB
C
/* This file is part of libmspack.
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* (C) 2003-2010 Stuart Caie.
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*
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* libmspack is free software; you can redistribute it and/or modify it under
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* the terms of the GNU Lesser General Public License (LGPL) version 2.1
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*
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* For further details, see the file COPYING.LIB distributed with libmspack
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*/
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#ifndef MSPACK_KWAJ_H
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#define MSPACK_KWAJ_H 1
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#include <lzss.h>
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/* generic KWAJ definitions */
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#define kwajh_Signature1 (0x00)
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#define kwajh_Signature2 (0x04)
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#define kwajh_CompMethod (0x08)
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#define kwajh_DataOffset (0x0a)
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#define kwajh_Flags (0x0c)
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#define kwajh_SIZEOF (0x0e)
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/* KWAJ compression definitions */
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struct mskwaj_compressor_p {
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struct mskwaj_compressor base;
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struct mspack_system *system;
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/* todo */
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int param[2]; /* !!! MATCH THIS TO NUM OF PARAMS IN MSPACK.H !!! */
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int error;
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};
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/* KWAJ decompression definitions */
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struct mskwaj_decompressor_p {
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struct mskwaj_decompressor base;
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struct mspack_system *system;
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int error;
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};
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struct mskwajd_header_p {
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struct mskwajd_header base;
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struct mspack_file *fh;
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};
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/* input buffer size during decompression - not worth parameterising IMHO */
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#define KWAJ_INPUT_SIZE (2048)
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/* huffman codes that are 9 bits or less are decoded immediately */
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#define KWAJ_TABLEBITS (9)
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/* number of codes in each huffman table */
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#define KWAJ_MATCHLEN1_SYMS (16)
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#define KWAJ_MATCHLEN2_SYMS (16)
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#define KWAJ_LITLEN_SYMS (32)
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#define KWAJ_OFFSET_SYMS (64)
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#define KWAJ_LITERAL_SYMS (256)
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/* define decoding table sizes */
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#define KWAJ_TABLESIZE (1 << KWAJ_TABLEBITS)
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#if KWAJ_TABLESIZE < (KWAJ_MATCHLEN1_SYMS * 2)
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# define KWAJ_MATCHLEN1_TBLSIZE (KWAJ_MATCHLEN1_SYMS * 4)
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#else
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# define KWAJ_MATCHLEN1_TBLSIZE (KWAJ_TABLESIZE + (KWAJ_MATCHLEN1_SYMS * 2))
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#endif
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#if KWAJ_TABLESIZE < (KWAJ_MATCHLEN2_SYMS * 2)
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# define KWAJ_MATCHLEN2_TBLSIZE (KWAJ_MATCHLEN2_SYMS * 4)
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#else
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# define KWAJ_MATCHLEN2_TBLSIZE (KWAJ_TABLESIZE + (KWAJ_MATCHLEN2_SYMS * 2))
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#endif
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#if KWAJ_TABLESIZE < (KWAJ_LITLEN_SYMS * 2)
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# define KWAJ_LITLEN_TBLSIZE (KWAJ_LITLEN_SYMS * 4)
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#else
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# define KWAJ_LITLEN_TBLSIZE (KWAJ_TABLESIZE + (KWAJ_LITLEN_SYMS * 2))
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#endif
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#if KWAJ_TABLESIZE < (KWAJ_OFFSET_SYMS * 2)
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# define KWAJ_OFFSET_TBLSIZE (KWAJ_OFFSET_SYMS * 4)
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#else
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# define KWAJ_OFFSET_TBLSIZE (KWAJ_TABLESIZE + (KWAJ_OFFSET_SYMS * 2))
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#endif
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#if KWAJ_TABLESIZE < (KWAJ_LITERAL_SYMS * 2)
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# define KWAJ_LITERAL_TBLSIZE (KWAJ_LITERAL_SYMS * 4)
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#else
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# define KWAJ_LITERAL_TBLSIZE (KWAJ_TABLESIZE + (KWAJ_LITERAL_SYMS * 2))
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#endif
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struct kwajd_stream {
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/* I/O buffering */
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struct mspack_system *sys;
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struct mspack_file *input;
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struct mspack_file *output;
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unsigned char *i_ptr, *i_end;
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unsigned int bit_buffer, bits_left;
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int input_end;
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/* huffman code lengths */
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unsigned char MATCHLEN1_len [KWAJ_MATCHLEN1_SYMS];
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unsigned char MATCHLEN2_len [KWAJ_MATCHLEN2_SYMS];
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unsigned char LITLEN_len [KWAJ_LITLEN_SYMS];
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unsigned char OFFSET_len [KWAJ_OFFSET_SYMS];
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unsigned char LITERAL_len [KWAJ_LITERAL_SYMS];
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/* huffman decoding tables */
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unsigned short MATCHLEN1_table [KWAJ_MATCHLEN1_TBLSIZE];
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unsigned short MATCHLEN2_table [KWAJ_MATCHLEN2_TBLSIZE];
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unsigned short LITLEN_table [KWAJ_LITLEN_TBLSIZE];
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unsigned short OFFSET_table [KWAJ_OFFSET_TBLSIZE];
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unsigned short LITERAL_table [KWAJ_LITERAL_TBLSIZE];
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/* input buffer */
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unsigned char inbuf[KWAJ_INPUT_SIZE];
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/* history window */
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unsigned char window[LZSS_WINDOW_SIZE];
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};
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#endif
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