gstreamer/gst/gsttype.h

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/* Gnome-Streamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
*
* 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., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __GST_TYPE_H__
#define __GST_TYPE_H__
#include <gst/gstbuffer.h>
#include <gst/gstelement.h>
/* type of function used to check a stream for equality with type */
typedef gboolean (*GstTypeFindFunc) (GstBuffer *buf,gpointer priv);
typedef struct _GstType GstType;
typedef struct _GstTypeFactory GstTypeFactory;
struct _GstType {
guint16 id; /* type id (assigned) */
gchar *mime; /* MIME type */
gchar *exts; /* space-delimited list of extensions */
GstTypeFindFunc typefindfunc; /* typefind function */
GList *srcs; /* list of src objects for this type */
GList *sinks; /* list of sink objects for type */
GHashTable *converters; /* a hashtable of factories that can convert
from this type to destination type. The
factories are indexed by destination type */
};
struct _GstTypeFactory {
gchar *mime;
gchar *exts;
GstTypeFindFunc typefindfunc;
};
/* initialize the subsystem */
void _gst_type_initialize();
/* create a new type, or find/merge an existing one */
guint16 gst_type_register(GstTypeFactory *factory);
/* look up a type by mime or extension */
guint16 gst_type_find_by_mime(gchar *mime);
guint16 gst_type_find_by_ext(gchar *ext);
/* add src or sink object */
void gst_type_add_src(guint16 id,GstElementFactory *src);
void gst_type_add_sink(guint16 id,GstElementFactory *sink);
/* get list of src or sink objects */
GList *gst_type_get_srcs(guint16 id);
GList *gst_type_get_sinks(guint16 id);
/* get GstType by id */
GstType *gst_type_find_by_id(guint16 id);
GList *gst_type_get_sink_to_src(guint16 sinkid, guint16 srcid);
/* get the list of registered types (returns list of GstType!) */
GList *gst_type_get_list();
void gst_type_dump();
xmlNodePtr gst_type_save_thyself(GstType *type, xmlNodePtr parent);
guint16 gst_type_load_thyself(xmlNodePtr parent);
xmlNodePtr gst_typefactory_save_thyself(GstTypeFactory *factory, xmlNodePtr parent);
GstTypeFactory *gst_typefactory_load_thyself(xmlNodePtr parent);
#endif /* __GST_TYPE_H__ */