gstreamer/gst/gsttype.h

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/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2000 Wim Taymans <wtay@chello.be>
*
* gsttype.h: Header for type management
*
* 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/gstcaps.h>
#include <gst/gstpluginfeature.h>
#include <gst/gstbytestream.h>
G_BEGIN_DECLS
/* type of function used to check a stream for equality with type */
typedef GstCaps* (*GstTypeFindFunc) (GstByteStream *bs, gpointer priv);
typedef struct _GstType GstType;
typedef struct _GstTypeDefinition GstTypeDefinition;
typedef struct _GstTypeFactory GstTypeFactory;
typedef struct _GstTypeFactoryClass GstTypeFactoryClass;
struct _GstType {
guint16 id; /* type id (assigned) */
gchar *mime; /* MIME type */
gchar *exts; /* space-delimited list of extensions */
GSList *factories; /* factories providing this type */
GST_STRUCT_PADDING
};
struct _GstTypeDefinition {
gchar *name;
gchar *mime;
gchar *exts;
GstTypeFindFunc typefindfunc;
};
#define GST_TYPE_TYPE_FACTORY (gst_type_factory_get_type ())
#define GST_TYPE_FACTORY(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_TYPE_FACTORY, GstTypeFactory))
#define GST_IS_TYPE_FACTORY(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_TYPE_FACTORY))
#define GST_TYPE_FACTORY_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_TYPE_FACTORY, GstTypeFactoryClass))
#define GST_IS_TYPE_FACTORY_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_TYPE_FACTORY))
#define GST_TYPE_FACTORY_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_TYPE_FACTORY, GstTypeFactoryClass))
struct _GstTypeFactory {
GstPluginFeature feature;
gchar *mime;
gchar *exts;
GstTypeFindFunc typefindfunc;
GST_OBJECT_PADDING
};
struct _GstTypeFactoryClass {
GstPluginFeatureClass parent;
GST_CLASS_PADDING
};
GType gst_type_factory_get_type (void);
GstTypeFactory* gst_type_factory_new (GstTypeDefinition *definition);
GstTypeFactory* gst_type_factory_find (const gchar *name);
/* 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 (const gchar *mime);
guint16 gst_type_find_by_ext (const gchar *ext);
/* get GstType by id */
GstType* gst_type_find_by_id (guint16 id);
/* get the list of registered types (returns list of GstType!) */
const GList* gst_type_get_list (void);
/* dummy typefind function */
GstCaps* gst_type_type_find_dummy (GstByteStream *bs, gpointer priv);
G_END_DECLS
#endif /* __GST_TYPE_H__ */