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Diffstat (limited to 'subprojects/gstreamer/gst/gstcontext.h')
| -rw-r--r-- | subprojects/gstreamer/gst/gstcontext.h | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/subprojects/gstreamer/gst/gstcontext.h b/subprojects/gstreamer/gst/gstcontext.h new file mode 100644 index 0000000000..92d8502b83 --- /dev/null +++ b/subprojects/gstreamer/gst/gstcontext.h @@ -0,0 +1,134 @@ +/* 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__ */ |