1 /* (C) 1999-2003 Nemosoft Unv. (webcam@smcc.demon.nl)
3 This program is free software; you can redistribute it and/or modify
4 it under the terms of the GNU General Public License as published by
5 the Free Software Foundation; either version 2 of the License, or
6 (at your option) any later version.
8 This program is distributed in the hope that it will be useful,
9 but WITHOUT ANY WARRANTY; without even the implied warranty of
10 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 GNU General Public License for more details.
13 You should have received a copy of the GNU General Public License
14 along with this program; if not, write to the Free Software
15 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 /* This file is the bridge between the kernel module and the plugin; it
19 describes the structures and datatypes used in both modules. Any
20 significant change should be reflected by increasing the
21 pwc_decompressor_version major number.
23 #ifndef PWC_UNCOMPRESS_H
24 #define PWC_UNCOMPRESS_H
26 #include <linux/config.h>
27 #include <linux/list.h>
35 /* The decompressor structure.
36 Every type of decompressor registers itself with the main module.
37 When a device is opened, it looks up the correct compressor, and
38 uses that when a compressed video mode is requested.
40 struct pwc_decompressor
42 int type; /* type of camera (645, 680, etc) */
43 int table_size; /* memory needed */
45 void (* init)(int release, void *buffer, void *table); /* Initialization routine; should be called after each set_video_mode */
46 void (* exit)(void); /* Cleanup routine */
47 void (* decompress)(struct pwc_coord *image, struct pwc_coord *view, struct pwc_coord *offset,
48 void *src, void *dst, int planar,
49 void *table, int bandlength);
50 void (* lock)(void); /* make sure module cannot be unloaded */
51 void (* unlock)(void); /* release lock on module */
53 struct list_head pwcd_list;
57 /* Our structure version number. Is set to the version number major */
58 extern const int pwc_decompressor_version;
60 /* Adds decompressor to list, based on its 'type' field (which matches the 'type' field in pwc_device; ignores any double requests */
61 extern void pwc_register_decompressor(struct pwc_decompressor *pwcd);
62 /* Removes decompressor, based on the type number */
63 extern void pwc_unregister_decompressor(int type);
64 /* Returns pointer to decompressor struct, or NULL if it doesn't exist */
65 extern struct pwc_decompressor *pwc_find_decompressor(int type);
67 #ifdef CONFIG_USB_PWCX
68 /* If the decompressor is compiled in, we must call these manually */
69 extern int usb_pwcx_init(void);
70 extern void usb_pwcx_exit(void);