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/* GStreamer
* Copyright (C) 2013 Collabora Ltd.
* Author: Sebastian Dröge <sebastian.droege@collabora.co.uk>
* Copyright (C) 2013 Sebastian Dröge <slomo@circular-chaos.org>
*
* gstcontext.h: Header for GstContext subsystem
*
* 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_CONTEXT_H__
#define __GST_CONTEXT_H__
#include <glib.h>
G_BEGIN_DECLS
typedef struct _GstContext GstContext;
#include <gst/gstminiobject.h>
#include <gst/gststructure.h>
GST_API GType _gst_context_type;
#define GST_TYPE_CONTEXT (_gst_context_type)
#define GST_IS_CONTEXT(obj) (GST_IS_MINI_OBJECT_TYPE (obj, GST_TYPE_CONTEXT))
#define GST_CONTEXT_CAST(obj) ((GstContext*)(obj))
#define GST_CONTEXT(obj) (GST_CONTEXT_CAST(obj))
GST_API
GType gst_context_get_type (void);
#ifndef GST_DISABLE_MINIOBJECT_INLINE_FUNCTIONS
/* refcounting */
static inline GstContext *
gst_context_ref (GstContext * context)
{
return (GstContext *) gst_mini_object_ref (GST_MINI_OBJECT_CAST (context));
}
static inline void
gst_context_unref (GstContext * context)
{
gst_mini_object_unref (GST_MINI_OBJECT_CAST (context));
}
/* copy context */
static inline GstContext *
gst_context_copy (const GstContext * context)
{
return GST_CONTEXT_CAST (gst_mini_object_copy (GST_MINI_OBJECT_CONST_CAST (context)));
}
#else /* GST_DISABLE_MINIOBJECT_INLINE_FUNCTIONS */
GST_API
GstContext * gst_context_ref (GstContext * context);
GST_API
void gst_context_unref (GstContext * context);
GST_API
GstContext * gst_context_copy (const GstContext * context);
#endif /* GST_DISABLE_MINIOBJECT_INLINE_FUNCTIONS */
/**
* gst_context_is_writable:
* @context: a #GstContext
*
* Tests if you can safely write into a context's structure or validly
* modify the seqnum and timestamp fields.
*/
#define gst_context_is_writable(context) gst_mini_object_is_writable (GST_MINI_OBJECT_CAST (context))
/**
* gst_context_make_writable:
* @context: (transfer full): the context to make writable
*
* Checks if a context is writable. If not, a writable copy is made and
* returned.
*
* Returns: (transfer full): a context (possibly a duplicate) that is writable.
*
* MT safe
*/
#define gst_context_make_writable(context) GST_CONTEXT_CAST (gst_mini_object_make_writable (GST_MINI_OBJECT_CAST (context)))
#ifndef GST_DISABLE_MINIOBJECT_INLINE_FUNCTIONS
static inline gboolean
gst_context_replace (GstContext **old_context, GstContext *new_context)
{
return gst_mini_object_replace ((GstMiniObject **) old_context, (GstMiniObject *) new_context);
}
#else /* GST_DISABLE_MINIOBJECT_INLINE_FUNCTIONS */
GST_API
gboolean gst_context_replace (GstContext ** old_context,
GstContext * new_context);
#endif /* GST_DISABLE_MINIOBJECT_INLINE_FUNCTIONS */
GST_API
GstContext * gst_context_new (const gchar * context_type,
gboolean persistent) G_GNUC_MALLOC;
GST_API
const gchar * gst_context_get_context_type (const GstContext * context);
GST_API
gboolean gst_context_has_context_type (const GstContext * context, const gchar * context_type);
GST_API
const GstStructure * gst_context_get_structure (const GstContext * context);
GST_API
GstStructure * gst_context_writable_structure (GstContext * context);
GST_API
gboolean gst_context_is_persistent (const GstContext * context);
G_DEFINE_AUTOPTR_CLEANUP_FUNC(GstContext, gst_context_unref)
G_END_DECLS
#endif /* __GST_CONTEXT_H__ */
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