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8983cce9f6
We need different export decorators for the different libs. For now no actual change though, just rename before the release, and add prelude headers to define the new decorator to GST_EXPORT.
160 lines
5 KiB
C
160 lines
5 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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/* refcounting */
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/**
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* gst_context_ref:
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* @context: the context to ref
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*
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* Convenience macro to increase the reference count of the context.
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*
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* Returns: @context (for convenience when doing assignments)
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*/
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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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/**
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* gst_context_unref:
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* @context: the context to unref
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*
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* Convenience macro to decrease the reference count of the context, possibly
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* freeing it.
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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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/* copy context */
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/**
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* gst_context_copy:
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* @context: the context to copy
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*
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* Creates a copy of the context. Returns a copy of the context.
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*
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* Returns: (transfer full): a new copy of @context.
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*
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* MT safe
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*/
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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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/**
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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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/**
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* gst_context_replace:
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* @old_context: (inout) (transfer full): pointer to a pointer to a #GstContext
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* to be replaced.
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* @new_context: (allow-none) (transfer none): pointer to a #GstContext that will
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* replace the context pointed to by @old_context.
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*
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* Modifies a pointer to a #GstContext to point to a different #GstContext. The
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* modification is done atomically (so this is useful for ensuring thread safety
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* in some cases), and the reference counts are updated appropriately (the old
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* context is unreffed, the new one is reffed).
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*
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* Either @new_context or the #GstContext pointed to by @old_context may be %NULL.
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*
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* Returns: %TRUE if @new_context was different from @old_context
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*/
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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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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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#ifdef G_DEFINE_AUTOPTR_CLEANUP_FUNC
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G_DEFINE_AUTOPTR_CLEANUP_FUNC(GstContext, gst_context_unref)
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#endif
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G_END_DECLS
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#endif /* __GST_CONTEXT_H__ */
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