patch-2.4.5 linux/drivers/usb/pwc-uncompress.h

• Lines: 68
• Date: Tue May 22 10:25:36 2001
• Orig file: v2.4.4/linux/drivers/usb/pwc-uncompress.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.4/linux/drivers/usb/pwc-uncompress.h linux/drivers/usb/pwc-uncompress.h
@@ -0,0 +1,67 @@
+/* (C) 1999-2001 Nemosoft Unv. (webcam@smcc.demon.nl)
+
+   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_DEC_H
+#define PWC_DEC_H
+
+#include <linux/config.h>
+
+#include <linux/list.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* The decompressor structure. 
+   Every type of decompressor registers itself with the main module. 
+   When a device is opened, it looks up the correct compressor, and
+   uses that when a compressed video mode is requested.
+ */
+struct pwc_decompressor
+{
+	int  type;	/* type of camera (645, 646, etc) */
+	int  (* init)(int release, void *buffer, void **data);	/* Initialization routine; should be called after each set_video_mode */
+	void (* exit)(void **data);	/* Cleanup routine */
+	int  (* decompress)(void *data, int width, int height, int bandlength, void *dst, void *src, int planar); /* The decompression routine itself */
+	void (* lock)(void); /* make sure module cannot be unloaded */
+	void (* unlock)(void); /* release lock on module */
+
+	struct list_head pwcd_list;
+};
+
+
+/* Our structure version number. Is set to the version number major */
+extern const int pwc_decompressor_version;
+
+/* Adds decompressor to list, based on its 'type' field (which matches the 'type' field in pwc_device; ignores any double requests */
+extern void pwc_register_decompressor(struct pwc_decompressor *pwcd);
+/* Removes decompressor, based on the type number */
+extern void pwc_unregister_decompressor(int type);
+/* Returns pointer to decompressor struct, or NULL if it doesn't exist */
+extern struct pwc_decompressor *pwc_find_decompressor(int type);
+
+#ifdef CONFIG_USB_PWCX
+/* If the decompressor is compiled in, we must call these manually */
+extern int usb_pwcx_init(void);
+extern void usb_pwcx_exit(void);
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif