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