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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