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144 lines
4.6 KiB
C
144 lines
4.6 KiB
C
/* GStreamer
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* Copyright (C) 2013 Collabora Ltd.
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* Author: Sebastian Dröge <sebastian.droege@collabora.co.uk>
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* Copyright (C) 2013 Sebastian Dröge <slomo@circular-chaos.org>
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*
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* gstcontext.h: Header for GstContext subsystem
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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., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef __GST_CONTEXT_H__
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#define __GST_CONTEXT_H__
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#include <glib.h>
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G_BEGIN_DECLS
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typedef struct _GstContext GstContext;
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#include <gst/gstminiobject.h>
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#include <gst/gststructure.h>
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GST_API GType _gst_context_type;
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#define GST_TYPE_CONTEXT (_gst_context_type)
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#define GST_IS_CONTEXT(obj) (GST_IS_MINI_OBJECT_TYPE (obj, GST_TYPE_CONTEXT))
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#define GST_CONTEXT_CAST(obj) ((GstContext*)(obj))
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#define GST_CONTEXT(obj) (GST_CONTEXT_CAST(obj))
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GST_API
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GType gst_context_get_type (void);
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#ifndef GST_DISABLE_MINIOBJECT_INLINE_FUNCTIONS
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/* refcounting */
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static inline GstContext *
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gst_context_ref (GstContext * context)
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{
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return (GstContext *) gst_mini_object_ref (GST_MINI_OBJECT_CAST (context));
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}
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static inline void
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gst_context_unref (GstContext * context)
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{
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gst_mini_object_unref (GST_MINI_OBJECT_CAST (context));
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}
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static inline void
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gst_clear_context (GstContext ** context_ptr)
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{
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gst_clear_mini_object ((GstMiniObject **) context_ptr);
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}
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/* copy context */
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static inline GstContext *
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gst_context_copy (const GstContext * context)
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{
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return GST_CONTEXT_CAST (gst_mini_object_copy (GST_MINI_OBJECT_CONST_CAST (context)));
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}
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#else /* GST_DISABLE_MINIOBJECT_INLINE_FUNCTIONS */
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GST_API
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GstContext * gst_context_ref (GstContext * context);
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GST_API
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void gst_context_unref (GstContext * context);
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GST_API
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void gst_clear_context (GstContext ** context_ptr);
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GST_API
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GstContext * gst_context_copy (const GstContext * context);
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#endif /* GST_DISABLE_MINIOBJECT_INLINE_FUNCTIONS */
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/**
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* gst_context_is_writable:
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* @context: a #GstContext
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*
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* Tests if you can safely write into a context's structure or validly
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* modify the seqnum and timestamp fields.
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*/
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#define gst_context_is_writable(context) gst_mini_object_is_writable (GST_MINI_OBJECT_CAST (context))
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/**
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* gst_context_make_writable:
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* @context: (transfer full): the context to make writable
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*
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* Checks if a context is writable. If not, a writable copy is made and
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* returned.
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*
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* Returns: (transfer full): a context (possibly a duplicate) that is writable.
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*
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* MT safe
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*/
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#define gst_context_make_writable(context) GST_CONTEXT_CAST (gst_mini_object_make_writable (GST_MINI_OBJECT_CAST (context)))
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#ifndef GST_DISABLE_MINIOBJECT_INLINE_FUNCTIONS
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static inline gboolean
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gst_context_replace (GstContext **old_context, GstContext *new_context)
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{
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return gst_mini_object_replace ((GstMiniObject **) old_context, (GstMiniObject *) new_context);
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}
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#else /* GST_DISABLE_MINIOBJECT_INLINE_FUNCTIONS */
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GST_API
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gboolean gst_context_replace (GstContext ** old_context,
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GstContext * new_context);
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#endif /* GST_DISABLE_MINIOBJECT_INLINE_FUNCTIONS */
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GST_API
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GstContext * gst_context_new (const gchar * context_type,
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gboolean persistent) G_GNUC_MALLOC;
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GST_API
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const gchar * gst_context_get_context_type (const GstContext * context);
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GST_API
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gboolean gst_context_has_context_type (const GstContext * context, const gchar * context_type);
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GST_API
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const GstStructure * gst_context_get_structure (const GstContext * context);
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GST_API
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GstStructure * gst_context_writable_structure (GstContext * context);
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GST_API
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gboolean gst_context_is_persistent (const GstContext * context);
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G_DEFINE_AUTOPTR_CLEANUP_FUNC(GstContext, gst_context_unref)
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G_END_DECLS
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#endif /* __GST_CONTEXT_H__ */
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