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
30 struct 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
53 int pwc_dec23_alloc(struct pwc_device *pwc);
54 int pwc_dec23_init(struct pwc_device *pwc, int type, unsigned char *cmd);
55 void pwc_dec23_exit(void);
56 void 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
68
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