gstreamer/gst-libs/gst/video/videocontext.h
2012-11-04 00:09:59 +00:00

117 lines
5.2 KiB
C

/* GStreamer
*
* Copyright (C) 2011 Intel
* Copyright (C) 2011 Collabora Ltd.
* Author: Nicolas Dufresne <nicolas.dufresne@collabora.co.uk>
*
* video-context.h: Video Context interface and helpers
*
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef __GST_VIDEO_CONTEXT_H__
#define __GST_VIDEO_CONTEXT_H__
#ifndef GST_USE_UNSTABLE_API
#warning "The GstVideoContext interface is unstable API and may change in future."
#warning "You can define GST_USE_UNSTABLE_API to avoid this warning."
#endif
#include <gst/gst.h>
G_BEGIN_DECLS
#define GST_TYPE_VIDEO_CONTEXT (gst_video_context_iface_get_type ())
#define GST_VIDEO_CONTEXT(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_VIDEO_CONTEXT, GstVideoContext))
#define GST_IS_VIDEO_CONTEXT(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_VIDEO_CONTEXT))
#define GST_VIDEO_CONTEXT_GET_IFACE(inst) (G_TYPE_INSTANCE_GET_INTERFACE ((inst), GST_TYPE_VIDEO_CONTEXT, GstVideoContextInterface))
/**
* GstVideoContext:
*
* Opaque #GstVideoContext data structure.
*/
typedef struct _GstVideoContext GstVideoContext;
typedef struct _GstVideoContextInterface GstVideoContextInterface;
/**
* GstVideoContextInterface:
* @parent: parent interface type.
* @set_context: vmethod to set video context.
*
* #GstVideoContextInterface interface.
*/
struct _GstVideoContextInterface
{
GTypeInterface parent;
/* virtual functions */
void (*set_context) (GstVideoContext * context,
const gchar * type,
const GValue * value);
};
GType gst_video_context_iface_get_type (void);
/* virtual class method and associated helpers */
void gst_video_context_set_context (GstVideoContext * context,
const gchar * type,
const GValue * value);
void gst_video_context_set_context_string (GstVideoContext * context,
const gchar * type,
const gchar * value);
void gst_video_context_set_context_pointer (GstVideoContext * context,
const gchar * type,
gpointer value);
void gst_video_context_set_context_object (GstVideoContext * context,
const gchar * type,
GObject * value);
/* message helpers */
void gst_video_context_prepare (GstVideoContext *context,
const gchar ** types);
gboolean gst_video_context_message_parse_prepare (GstMessage * message,
const gchar *** types,
GstVideoContext ** ctx);
/* query helpers */
GstQuery * gst_video_context_query_new (const gchar ** types);
gboolean gst_video_context_run_query (GstElement *element,
GstQuery *query);
const gchar ** gst_video_context_query_get_supported_types (GstQuery * query);
void gst_video_context_query_parse_value (GstQuery * query,
const gchar ** type,
const GValue ** value);
void gst_video_context_query_set_value (GstQuery * query,
const gchar * type,
GValue * value);
void gst_video_context_query_set_string (GstQuery * query,
const gchar * type,
const gchar * value);
void gst_video_context_query_set_pointer (GstQuery * query,
const gchar * type,
gpointer value);
void gst_video_context_query_set_object (GstQuery * query,
const gchar * type,
GObject * value);
G_END_DECLS
#endif /* __GST_VIDEO_CONTEXT_H__ */