1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /* Linux driver for Philips webcam
3    (C) 2004-2006 Luc Saillard (luc@saillard.org)
4 
5    NOTE: this version of pwc is an unofficial (modified) release of pwc & pcwx
6    driver and thus may have bugs that are not present in the original version.
7    Please send bug reports and support requests to <luc@saillard.org>.
8    The decompression routines have been implemented by reverse-engineering the
9    Nemosoft binary pwcx module. Caveat emptor.
10 
11 */
12 
13 #ifndef PWC_DEC23_H
14 #define PWC_DEC23_H
15 
16 struct pwc_device;
17 
18 struct pwc_dec23_private
19 {
20 	struct mutex lock;
21 
22 	unsigned char last_cmd, last_cmd_valid;
23 
24   unsigned int scalebits;
25   unsigned int nbitsmask, nbits; /* Number of bits of a color in the compressed stream */
26 
27   unsigned int reservoir;
28   unsigned int nbits_in_reservoir;
29 
30   const unsigned char *stream;
31   int temp_colors[16];
32 
33   unsigned char table_0004_pass1[16][1024];
34   unsigned char table_0004_pass2[16][1024];
35   unsigned char table_8004_pass1[16][256];
36   unsigned char table_8004_pass2[16][256];
37   unsigned int  table_subblock[256][12];
38 
39   unsigned char table_bitpowermask[8][256];
40   unsigned int  table_d800[256];
41   unsigned int  table_dc00[256];
42 
43 };
44 
45 void pwc_dec23_init(struct pwc_device *pdev, const unsigned char *cmd);
46 void pwc_dec23_decompress(struct pwc_device *pdev,
47 			  const void *src,
48 			  void *dst);
49 #endif
50