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/linkage.h>
28 #include <linux/list.h>
30 #include "pwc-ioctl.h"
33 #define PWCX_FLAG_PLANAR 0x0001
41 /* The decompressor structure.
42 Every type of decompressor registers itself with the main module.
43 When a device is opened, it looks up the correct compressor, and
44 uses that when a compressed video mode is requested.
46 struct pwc_decompressor
48 int type; /* type of camera (645, 680, etc) */
49 int table_size; /* memory needed */
51 void (* init)(int type, int release, void *buffer, void *table); /* Initialization routine; should be called after each set_video_mode */
52 void (* exit)(void); /* Cleanup routine */
53 void (* decompress)(struct pwc_coord *image, struct pwc_coord *view,
54 struct pwc_coord *offset,
55 void *src, void *dst, int flags,
56 void *table, int bandlength);
57 void (* lock)(void); /* make sure module cannot be unloaded */
58 void (* unlock)(void); /* release lock on module */
60 struct list_head pwcd_list;
64 /* Our structure version number. Is set to the version number major */
65 extern const int pwc_decompressor_version;
67 /* Adds decompressor to list, based on its 'type' field (which matches the 'type' field in pwc_device; ignores any double requests */
68 extern void pwc_register_decompressor(struct pwc_decompressor *pwcd);
69 /* Removes decompressor, based on the type number */
70 extern void pwc_unregister_decompressor(int type);
71 /* Returns pointer to decompressor struct, or NULL if it doesn't exist */
72 extern struct pwc_decompressor *pwc_find_decompressor(int type);
74 #ifdef CONFIG_USB_PWCX
75 /* If the decompressor is compiled in, we must call these manually */
76 extern int usb_pwcx_init(void);
77 extern void usb_pwcx_exit(void);