/* 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., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, 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) (GST_IMPLEMENTS_INTERFACE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_VIDEO_CONTEXT, GstVideoContext)) #define GST_IS_VIDEO_CONTEXT(obj) (GST_IMPLEMENTS_INTERFACE_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__ */