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 struct pwc_device; 29 30 struct pwc_dec23_private 31 { 32 struct mutex lock; 33 34 unsigned char last_cmd, last_cmd_valid; 35 36 unsigned int scalebits; 37 unsigned int nbitsmask, nbits; /* Number of bits of a color in the compressed stream */ 38 39 unsigned int reservoir; 40 unsigned int nbits_in_reservoir; 41 42 const unsigned char *stream; 43 int temp_colors[16]; 44 45 unsigned char table_0004_pass1[16][1024]; 46 unsigned char table_0004_pass2[16][1024]; 47 unsigned char table_8004_pass1[16][256]; 48 unsigned char table_8004_pass2[16][256]; 49 unsigned int table_subblock[256][12]; 50 51 unsigned char table_bitpowermask[8][256]; 52 unsigned int table_d800[256]; 53 unsigned int table_dc00[256]; 54 55 }; 56 57 void pwc_dec23_init(struct pwc_device *pdev, const unsigned char *cmd); 58 void pwc_dec23_decompress(struct pwc_device *pdev, 59 const void *src, 60 void *dst); 61 #endif 62