*
* 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., 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA.
+ * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
*/
#ifndef __GST_META_H__
#define __GST_META_H__
+#include <glib.h>
+
G_BEGIN_DECLS
typedef struct _GstMeta GstMeta;
#define GST_META_FLAG_UNSET(meta,flag) (GST_META_FLAGS (meta) &= ~(flag))
/**
+ * GST_META_TAG_MEMORY_STR:
+ *
+ * This metadata stays relevant as long as memory layout is unchanged.
+ *
+ * Since: 1.2
+ */
+#define GST_META_TAG_MEMORY_STR "memory"
+
+/**
* GstMeta:
* @flags: extra flags for the metadata
* @info: pointer to the #GstMetaInfo
const GstMetaInfo *info;
};
+#include <gst/gstbuffer.h>
+
/**
* GstMetaInitFunction:
* @meta: a #GstMeta
*
* GQuark for the "gst-copy" transform.
*/
-GST_EXPORT GQuark _gst_meta_transform_copy;
+
+GST_API GQuark _gst_meta_transform_copy;
/**
* GST_META_TRANSFORM_IS_COPY:
/**
* GstMetaInfo:
- * @api: tag indentifying the metadata structure and api
- * @type: type indentifying the implementor of the api
+ * @api: tag identifying the metadata structure and api
+ * @type: type identifying the implementor of the api
* @size: size of the metadata
* @init_func: function for initializing the metadata
* @free_func: function for freeing the metadata
GstMetaFreeFunction free_func;
GstMetaTransformFunction transform_func;
- /*< private >*/
- gpointer _gst_reserved[GST_PADDING];
+ /* No padding needed, GstMetaInfo is always allocated by GStreamer and is
+ * not subclassable or stack-allocatable, so we can extend it as we please
+ * just like interfaces */
};
+GST_API
GType gst_meta_api_type_register (const gchar *api,
const gchar **tags);
+GST_API
gboolean gst_meta_api_type_has_tag (GType api, GQuark tag);
+GST_API
const GstMetaInfo * gst_meta_register (GType api, const gchar *impl,
gsize size,
GstMetaInitFunction init_func,
GstMetaFreeFunction free_func,
GstMetaTransformFunction transform_func);
+GST_API
const GstMetaInfo * gst_meta_get_info (const gchar * impl);
+GST_API
+const gchar* const* gst_meta_api_type_get_tags (GType api);
+
+GST_API
+guint64 gst_meta_get_seqnum (const GstMeta * meta);
+
+GST_API
+gint gst_meta_compare_seqnum (const GstMeta * meta1,
+ const GstMeta * meta2);
+
/* some default tags */
-GST_EXPORT GQuark _gst_meta_tag_memory;
+
+GST_API GQuark _gst_meta_tag_memory;
/**
* GST_META_TAG_MEMORY:
*
* Metadata tagged with this tag depends on the particular memory
* or buffer that it is on.
+ *
+ * Deprecated: The GQuarks are not exported by any public API, use
+ * GST_META_TAG_MEMORY_STR instead.
*/
+#ifndef GST_DISABLE_DEPRECATED
#define GST_META_TAG_MEMORY (_gst_meta_tag_memory)
+#endif
G_END_DECLS