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/* (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
*/
/* This file is the bridge between the kernel module and the plugin; it
describes the structures and datatypes used in both modules. Any
significant change should be reflected by increasing the
pwc_decompressor_version major number.
*/
#ifndef PWC_DEC_H
#define PWC_DEC_H
#include <linux/config.h>
#include <linux/list.h>
#include "pwc.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, 680, etc) */
int table_size; /* memory needed */
void (* init)(int release, void *buffer, void *table); /* Initialization routine; should be called after each set_video_mode */
void (* exit)(void); /* Cleanup routine */
void (* decompress)(struct pwc_coord *image, struct pwc_coord *view, struct pwc_coord *offset,
void *src, void *dst, int planar,
void *table, int bandlength);
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
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