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/*
* Xilinx Video Library
*
* 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_VIDEO_H__
#define __XLNX_VIDEO_H__
/**
* \file
* \brief Xilinx Video Library
*/
struct xlnx_video;
struct xlnx_video_component;
struct xlnx_video_pipeline;
struct xlnx_video *xlnx_video_create(void);
int xlnx_video_setup(struct xlnx_video *xv);
void xlnx_video_destroy(struct xlnx_video *xv);
/**
* \brief Library log level
*
* Only messages with a log level lower than or equal to the library context
* log level are logged, all other messages are dropped silently.
*
* \sa xlnx_log_set_level()
*/
enum xlnx_log_level {
/** Don't log any message */
XLNX_LOG_NONE = 0,
/** Log error messages */
XLNX_LOG_ERROR = 1,
/** Log warning messages */
XLNX_LOG_WARNING = 2,
/** Log informational messages */
XLNX_LOG_INFO = 3,
/** Log debug messages */
XLNX_LOG_DEBUG = 4,
};
void xlnx_video_set_log_level(struct xlnx_video *xv, enum xlnx_log_level level);
/**
* \brief Event handler operations
*
* The library requires a set of event handling operations whose implementation
* can vary between applications depending on their architecture. To avoid
* restricting applications to a particular programming model, those operations
* are not implemented by the library directly but must be provided by
* applications in the form of callback functions.
*
* The xlnx_video_event_operations structure contains callback function
* pointers for all event handling operations. Applications must supply an
* implementation for each operation.
*
* All event handling operations are called by the library with the handler
* parameter set to the event handler passed to the
* xlnx_video_set_event_handler() function.
*/
struct xlnx_video_event_operations {
/**
* \param handler event handler private data
* \param fd the file descriptor number
* \param events the types of events to watch for
* \param callback callback event handler
* \param priv private token passed to the callback event handler
*
* Start watching the file descriptor \a fd for events of type
* \a events, and call the \a callback function with the priv parameter
* set to \a priv when such an event is detected.
*/
void (*watch)(void *handler, int fd, int events,
void(*callback)(void *priv), void *priv);
/**
* \param handler event handler private data
* \param fd the file descriptor number
*
* Stop watching the file descriptor \a fd for events.
*/
void (*unwatch)(void *handler, int fd);
};
void xlnx_video_set_event_handler(struct xlnx_video *xv,
const struct xlnx_video_event_operations *ops,
void *handler);
void *xlnx_video_get_event_handler_data(struct xlnx_video *xv);
int xlnx_video_plugin_load_directory(struct xlnx_video *xv, const char *path);
/**
* \brief Video component type
*/
enum xlnx_video_component_type {
/** Video capture component (input) */
XLNX_VIDEO_COMPONENT_CAPTURE = 1 << 0,
/** Video processing component (memory to memory) */
XLNX_VIDEO_COMPONENT_PROCESS = 1 << 1,
/** Video display component (output) */
XLNX_VIDEO_COMPONENT_DISPLAY = 1 << 2,
/** Any component type */
XLNX_VIDEO_COMPONENT_ANY = XLNX_VIDEO_COMPONENT_CAPTURE
| XLNX_VIDEO_COMPONENT_PROCESS
| XLNX_VIDEO_COMPONENT_DISPLAY,
};
int xlnx_video_component_enumerate(struct xlnx_video *xv);
int xlnx_video_component_list(struct xlnx_video *xv,
enum xlnx_video_component_type type,
struct xlnx_video_component ***components);
const char *xlnx_video_component_name(const struct xlnx_video_component *xvcomp);
enum xlnx_video_component_type
xlnx_video_component_type(const struct xlnx_video_component *xvcomp);
#endif
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