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