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/*
* Xilinx Video Library - Plugin API
*
* Copyright (C) 2014-2016 Ideas on board Oy
*
* Contact: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or (at
* your option) any later version.
*
* This library 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.
*/
#ifndef __XLNX_PLUGIN_H__
#define __XLNX_PLUGIN_H__
/**
* \file
* \brief Library plugin support
*
* To be discovered by the Xilinx video library, plugins must export a plugin
* operations structure with a well-defined symbol name. Plugins should use the
* EXPORT_XLNX_VIDEO_PLUGIN() macro to declare the strucure and initialize its
* members with function pointers.
*
* \code{.c}
* EXPORT_XLNX_VIDEO_PLUGIN(myplugin) = {
* .info = myplugin_info,
* .scan = myplugin_scan,
* }
* \endcode
*/
#include <xlnx-video.h>
struct media_device;
struct xlnx_video_compoment;
/**
* \brief Type of video component supported by the plugin
*/
enum xlnx_video_plugin_type {
/**
* Hardware video component, handled automatically when the plugin is
* loaded or the component discovered.
*/
XLNX_VIDEO_PLUGIN_TYPE_HARDWARE,
/**
* Software video component, instantiated manually.
*/
XLNX_VIDEO_PLUGIN_TYPE_SOFTWARE,
};
/**
* \brief Plugin information
*/
struct xlnx_video_plugin_info {
/** Plugin name */
const char *name;
/** Plugin type, one of XLNX_VIDEO_PLUGIN_TYPE_* */
enum xlnx_video_plugin_type type;
};
/**
* \brief Xilinx video plugin operations
*/
struct xlnx_video_plugin_ops {
/**
* Query plugin information. The returned structure must be valid for
* the lifetime of the plugin.
*/
const struct xlnx_video_plugin_info *(*info)(void);
struct xlnx_video_component *(*scan)(struct xlnx_video *xv,
struct media_device *mdev);
struct xlnx_video_component *(*create_component)(struct xlnx_video *xv);
void (*destroy_component)(struct xlnx_video *xv,
struct xlnx_video_compoment *xvcomp);
/** Reserved fields for ABI compatibility, must be set to NULL. */
void (*reserved[10])(void);
};
/** \cond IGNORE */
#define XLNX_VIDEO_PLUGIN_SYMBOL __xlnx_video_plugin
#define EXPORT_XLNX_VIDEO_PLUGIN(name) \
const struct xlnx_video_plugin_ops XLNX_VIDEO_PLUGIN_SYMBOL
/** \endcond */
#endif /* __XLNX_PLUGIN_H__ */
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