obs-studio/plugins/linux-v4l2/v4l2-udev.h

81 lines
2.1 KiB
C

/*
Copyright (C) 2014 by Leonhard Oelke <leonhard@in-verted.de>
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, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include <inttypes.h>
#ifdef __cplusplus
extern "C" {
#endif
/**
* Initialize udev system to watch for device events
*
* @return monitor object, or NULL on error
*/
void *v4l2_init_udev(void);
/**
* Unref the udev system
*
* This will also remove any registered callbacks if there are any
*
* @param monitor monitor object
*/
void v4l2_unref_udev(void *monitor);
/**
* Callback when a device was added.
*
* @param dev device node of the device that was added
* @param userdata pointer to userdata specified when registered
*/
typedef void (*v4l2_device_added_cb)(const char *dev, void *userdata);
/**
* Callback when a device was removed.
*
* @param dev device node of the device that was removed
* @param userdata pointer to userdata specified when registered
*/
typedef void (*v4l2_device_removed_cb)(const char *dev, void *userdata);
/**
* Register the device added callback
*
* @param monitor monitor object
* @param cb the function that should be called
* @param userdata pointer to userdata that should be passed to the callback
*/
void v4l2_set_device_added_callback(void *monitor, v4l2_device_added_cb cb,
void *userdata);
/**
* Register the device remove callback
*
* @param monitor monitor object
* @param cb the function that should be called
* @param userdata pointer to userdata that should be passed to the callback
*/
void v4l2_set_device_removed_callback(void *monitor, v4l2_device_removed_cb cb,
void *userdata);
#ifdef __cplusplus
}
#endif