1/* (C) 1999-2003 Nemosoft Unv. (webcam@smcc.demon.nl) 2 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. 7 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. 12 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 16*/ 17 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. 22 */ 23#ifndef PWC_UNCOMPRESS_H 24#define PWC_UNCOMPRESS_H 25 26#include <linux/config.h> 27#include <linux/list.h> 28 29#include "pwc.h" 30 31#ifdef __cplusplus 32extern "C" { 33#endif 34 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. 39 */ 40struct pwc_decompressor 41{ 42 int type; /* type of camera (645, 680, etc) */ 43 int table_size; /* memory needed */ 44 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 */ 52 53 struct list_head pwcd_list; 54}; 55 56 57/* Our structure version number. Is set to the version number major */ 58extern const int pwc_decompressor_version; 59 60/* Adds decompressor to list, based on its 'type' field (which matches the 'type' field in pwc_device; ignores any double requests */ 61extern void pwc_register_decompressor(struct pwc_decompressor *pwcd); 62/* Removes decompressor, based on the type number */ 63extern void pwc_unregister_decompressor(int type); 64/* Returns pointer to decompressor struct, or NULL if it doesn't exist */ 65extern struct pwc_decompressor *pwc_find_decompressor(int type); 66 67#ifdef CONFIG_USB_PWCX 68/* If the decompressor is compiled in, we must call these manually */ 69extern int usb_pwcx_init(void); 70extern void usb_pwcx_exit(void); 71#endif 72 73#ifdef __cplusplus 74} 75#endif 76 77#endif 78