1/* Linux driver for Philips webcam 2 (C) 2004-2006 Luc Saillard (luc@saillard.org) 3 4 NOTE: this version of pwc is an unofficial (modified) release of pwc & pcwx 5 driver and thus may have bugs that are not present in the original version. 6 Please send bug reports and support requests to <luc@saillard.org>. 7 The decompression routines have been implemented by reverse-engineering the 8 Nemosoft binary pwcx module. Caveat emptor. 9 10 This program is free software; you can redistribute it and/or modify 11 it under the terms of the GNU General Public License as published by 12 the Free Software Foundation; either version 2 of the License, or 13 (at your option) any later version. 14 15 This program is distributed in the hope that it will be useful, 16 but WITHOUT ANY WARRANTY; without even the implied warranty of 17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18 GNU General Public License for more details. 19 20 You should have received a copy of the GNU General Public License 21 along with this program; if not, write to the Free Software 22 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 23*/ 24 25#ifndef PWC_DEC23_H 26#define PWC_DEC23_H 27 28#include "pwc.h" 29 30struct pwc_dec23_private 31{ 32 unsigned int scalebits; 33 unsigned int nbitsmask, nbits; /* Number of bits of a color in the compressed stream */ 34 35 unsigned int reservoir; 36 unsigned int nbits_in_reservoir; 37 const unsigned char *stream; 38 int temp_colors[16]; 39 40 unsigned char table_0004_pass1[16][1024]; 41 unsigned char table_0004_pass2[16][1024]; 42 unsigned char table_8004_pass1[16][256]; 43 unsigned char table_8004_pass2[16][256]; 44 unsigned int table_subblock[256][12]; 45 46 unsigned char table_bitpowermask[8][256]; 47 unsigned int table_d800[256]; 48 unsigned int table_dc00[256]; 49 50}; 51 52 53int pwc_dec23_alloc(struct pwc_device *pwc); 54int pwc_dec23_init(struct pwc_device *pwc, int type, unsigned char *cmd); 55void pwc_dec23_exit(void); 56void pwc_dec23_decompress(const struct pwc_device *pwc, 57 const void *src, 58 void *dst, 59 int flags); 60 61 62 63#endif 64 65 66/* vim: set cino= formatoptions=croql cindent shiftwidth=8 tabstop=8: */ 67