mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-29 19:50:40 +00:00
92d3246f76
One omission: gst_allocator_sysmem_get_type() was exported but never in any public header file.
160 lines
5 KiB
C
160 lines
5 KiB
C
/* 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_EXPORT 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_EXPORT
|
|
GType gst_context_get_type (void);
|
|
|
|
|
|
/* refcounting */
|
|
/**
|
|
* gst_context_ref:
|
|
* @context: the context to ref
|
|
*
|
|
* Convenience macro to increase the reference count of the context.
|
|
*
|
|
* Returns: @context (for convenience when doing assignments)
|
|
*/
|
|
static inline GstContext *
|
|
gst_context_ref (GstContext * context)
|
|
{
|
|
return (GstContext *) gst_mini_object_ref (GST_MINI_OBJECT_CAST (context));
|
|
}
|
|
|
|
/**
|
|
* gst_context_unref:
|
|
* @context: the context to unref
|
|
*
|
|
* Convenience macro to decrease the reference count of the context, possibly
|
|
* freeing it.
|
|
*/
|
|
static inline void
|
|
gst_context_unref (GstContext * context)
|
|
{
|
|
gst_mini_object_unref (GST_MINI_OBJECT_CAST (context));
|
|
}
|
|
|
|
/* copy context */
|
|
/**
|
|
* gst_context_copy:
|
|
* @context: the context to copy
|
|
*
|
|
* Creates a copy of the context. Returns a copy of the context.
|
|
*
|
|
* Returns: (transfer full): a new copy of @context.
|
|
*
|
|
* MT safe
|
|
*/
|
|
static inline GstContext *
|
|
gst_context_copy (const GstContext * context)
|
|
{
|
|
return GST_CONTEXT_CAST (gst_mini_object_copy (GST_MINI_OBJECT_CONST_CAST (context)));
|
|
}
|
|
|
|
/**
|
|
* 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)))
|
|
/**
|
|
* gst_context_replace:
|
|
* @old_context: (inout) (transfer full): pointer to a pointer to a #GstContext
|
|
* to be replaced.
|
|
* @new_context: (allow-none) (transfer none): pointer to a #GstContext that will
|
|
* replace the context pointed to by @old_context.
|
|
*
|
|
* Modifies a pointer to a #GstContext to point to a different #GstContext. The
|
|
* modification is done atomically (so this is useful for ensuring thread safety
|
|
* in some cases), and the reference counts are updated appropriately (the old
|
|
* context is unreffed, the new one is reffed).
|
|
*
|
|
* Either @new_context or the #GstContext pointed to by @old_context may be %NULL.
|
|
*
|
|
* Returns: %TRUE if @new_context was different from @old_context
|
|
*/
|
|
static inline gboolean
|
|
gst_context_replace (GstContext **old_context, GstContext *new_context)
|
|
{
|
|
return gst_mini_object_replace ((GstMiniObject **) old_context, (GstMiniObject *) new_context);
|
|
}
|
|
|
|
GST_EXPORT
|
|
GstContext * gst_context_new (const gchar * context_type,
|
|
gboolean persistent) G_GNUC_MALLOC;
|
|
GST_EXPORT
|
|
const gchar * gst_context_get_context_type (const GstContext * context);
|
|
|
|
GST_EXPORT
|
|
gboolean gst_context_has_context_type (const GstContext * context, const gchar * context_type);
|
|
|
|
GST_EXPORT
|
|
const GstStructure * gst_context_get_structure (const GstContext * context);
|
|
|
|
GST_EXPORT
|
|
GstStructure * gst_context_writable_structure (GstContext * context);
|
|
|
|
GST_EXPORT
|
|
gboolean gst_context_is_persistent (const GstContext * context);
|
|
|
|
#ifdef G_DEFINE_AUTOPTR_CLEANUP_FUNC
|
|
G_DEFINE_AUTOPTR_CLEANUP_FUNC(GstContext, gst_context_unref)
|
|
#endif
|
|
|
|
G_END_DECLS
|
|
|
|
#endif /* __GST_CONTEXT_H__ */
|