V4L/DVB (3835): [PATCH] update pwc driver

Add v4l2 compatibility
Include the decompressor (legal problem has been resolv by Alan Cox)
Faster decoder and easier to maintain, optimize, ...
Can export to userland compressed stream
Support more cameras, lot of bugs are fixed.

Signed-off-by: Luc Saillard <luc@saillard.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 67 insertions, 0 deletions

diff --git a/drivers/media/video/pwc/pwc-dec23.h b/drivers/media/video/pwc/pwc-dec23.h
new file mode 100644
index 00000000000000..1c55298ad15378
--- /dev/null
+++ b/drivers/media/video/pwc/pwc-dec23.h
@@ -0,0 +1,67 @@
+/* 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.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+*/
+
+#ifndef PWC_DEC23_H
+#define PWC_DEC23_H
+
+#include "pwc.h"
+
+struct pwc_dec23_private
+{
+  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];
+
+};
+
+
+int pwc_dec23_alloc(struct pwc_device *pwc);
+int pwc_dec23_init(struct pwc_device *pwc, int type, unsigned char *cmd);
+void pwc_dec23_exit(void);
+void pwc_dec23_decompress(const struct pwc_device *pwc,
+			  const void *src,
+			  void *dst,
+			  int flags);
+
+
+
+#endif
+
+
+/* vim: set cino= formatoptions=croql cindent shiftwidth=8 tabstop=8: */
+