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117 lines
5.2 KiB
C
117 lines
5.2 KiB
C
/* GStreamer
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*
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* Copyright (C) 2011 Intel
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* Copyright (C) 2011 Collabora Ltd.
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* Author: Nicolas Dufresne <nicolas.dufresne@collabora.co.uk>
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*
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* video-context.h: Video Context interface and helpers
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*
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifndef __GST_VIDEO_CONTEXT_H__
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#define __GST_VIDEO_CONTEXT_H__
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#ifndef GST_USE_UNSTABLE_API
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#warning "The GstVideoContext interface is unstable API and may change in future."
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#warning "You can define GST_USE_UNSTABLE_API to avoid this warning."
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#endif
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#include <gst/gst.h>
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G_BEGIN_DECLS
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#define GST_TYPE_VIDEO_CONTEXT (gst_video_context_iface_get_type ())
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#define GST_VIDEO_CONTEXT(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_VIDEO_CONTEXT, GstVideoContext))
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#define GST_IS_VIDEO_CONTEXT(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_VIDEO_CONTEXT))
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#define GST_VIDEO_CONTEXT_GET_IFACE(inst) (G_TYPE_INSTANCE_GET_INTERFACE ((inst), GST_TYPE_VIDEO_CONTEXT, GstVideoContextInterface))
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/**
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* GstVideoContext:
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*
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* Opaque #GstVideoContext data structure.
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*/
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typedef struct _GstVideoContext GstVideoContext;
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typedef struct _GstVideoContextInterface GstVideoContextInterface;
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/**
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* GstVideoContextInterface:
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* @parent: parent interface type.
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* @set_context: vmethod to set video context.
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*
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* #GstVideoContextInterface interface.
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*/
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struct _GstVideoContextInterface
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{
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GTypeInterface parent;
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/* virtual functions */
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void (*set_context) (GstVideoContext * context,
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const gchar * type,
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const GValue * value);
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};
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GType gst_video_context_iface_get_type (void);
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/* virtual class method and associated helpers */
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void gst_video_context_set_context (GstVideoContext * context,
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const gchar * type,
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const GValue * value);
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void gst_video_context_set_context_string (GstVideoContext * context,
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const gchar * type,
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const gchar * value);
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void gst_video_context_set_context_pointer (GstVideoContext * context,
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const gchar * type,
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gpointer value);
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void gst_video_context_set_context_object (GstVideoContext * context,
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const gchar * type,
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GObject * value);
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/* message helpers */
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void gst_video_context_prepare (GstVideoContext *context,
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const gchar ** types);
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gboolean gst_video_context_message_parse_prepare (GstMessage * message,
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const gchar *** types,
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GstVideoContext ** ctx);
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/* query helpers */
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GstQuery * gst_video_context_query_new (const gchar ** types);
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gboolean gst_video_context_run_query (GstElement *element,
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GstQuery *query);
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const gchar ** gst_video_context_query_get_supported_types (GstQuery * query);
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void gst_video_context_query_parse_value (GstQuery * query,
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const gchar ** type,
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const GValue ** value);
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void gst_video_context_query_set_value (GstQuery * query,
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const gchar * type,
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GValue * value);
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void gst_video_context_query_set_string (GstQuery * query,
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const gchar * type,
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const gchar * value);
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void gst_video_context_query_set_pointer (GstQuery * query,
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const gchar * type,
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gpointer value);
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void gst_video_context_query_set_object (GstQuery * query,
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const gchar * type,
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GObject * value);
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G_END_DECLS
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#endif /* __GST_VIDEO_CONTEXT_H__ */
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