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/* SPDX-License-Identifier: GPL-2.0-or-later */
/* Linux driver for Philips webcam
(C) 2004-2006 Luc Saillard (luc@saillard.org)
NOTE: this version of pwc is an unofficial (modified) release of pwc & pcwx
driver and thus may have bugs that are not present in the original version.
Please send bug reports and support requests to <luc@saillard.org>.
The decompression routines have been implemented by reverse-engineering the
Nemosoft binary pwcx module. Caveat emptor.
*/
#ifndef PWC_DEC23_H
#define PWC_DEC23_H
struct pwc_device;
struct pwc_dec23_private
{
struct mutex lock;
unsigned char last_cmd, last_cmd_valid;
unsigned int scalebits;
unsigned int nbitsmask, nbits; /* Number of bits of a color in the compressed stream */
unsigned int reservoir;
unsigned int nbits_in_reservoir;
const unsigned char *stream;
int temp_colors[16];
unsigned char table_0004_pass1[16][1024];
unsigned char table_0004_pass2[16][1024];
unsigned char table_8004_pass1[16][256];
unsigned char table_8004_pass2[16][256];
unsigned int table_subblock[256][12];
unsigned char table_bitpowermask[8][256];
unsigned int table_d800[256];
unsigned int table_dc00[256];
};
void pwc_dec23_init(struct pwc_device *pdev, const unsigned char *cmd);
void pwc_dec23_decompress(struct pwc_device *pdev,
const void *src,
void *dst);
#endif
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