drivers/media/usb/pwc/pwc-dec23.h

   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