gstreamer/gst/gstelementfactory.h
Wim Taymans 920ef127ce element: rework GstElementDetails
Clean up the GstElement structure
Replace GstElementDetails with metadata
2010-12-07 15:33:04 +01:00

248 lines
10 KiB
C

/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2000,2004 Wim Taymans <wim@fluendo.com>
*
* gstelement.h: Header for GstElement
*
* 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_ELEMENT_FACTORY_H__
#define __GST_ELEMENT_FACTORY_H__
typedef struct _GstElementFactory GstElementFactory;
typedef struct _GstElementFactoryClass GstElementFactoryClass;
#include <gst/gstconfig.h>
#include <gst/gstelement.h>
#include <gst/gstobject.h>
#include <gst/gstplugin.h>
#include <gst/gstpluginfeature.h>
#include <gst/gstiterator.h>
G_BEGIN_DECLS
#define GST_TYPE_ELEMENT_FACTORY (gst_element_factory_get_type())
#define GST_ELEMENT_FACTORY(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_ELEMENT_FACTORY,\
GstElementFactory))
#define GST_ELEMENT_FACTORY_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_ELEMENT_FACTORY,\
GstElementFactoryClass))
#define GST_IS_ELEMENT_FACTORY(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_ELEMENT_FACTORY))
#define GST_IS_ELEMENT_FACTORY_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_ELEMENT_FACTORY))
#define GST_ELEMENT_FACTORY_CAST(obj) ((GstElementFactory *)(obj))
/**
* GstElementFactory:
*
* The opaque #GstElementFactory data structure.
*/
struct _GstElementFactory {
GstPluginFeature parent;
GType type; /* unique GType of element or 0 if not loaded */
gpointer metadata;
GList * staticpadtemplates; /* GstStaticPadTemplate list */
guint numpadtemplates;
/* URI interface stuff */
guint uri_type;
gchar ** uri_protocols;
GList * interfaces; /* interface type names this element implements */
/*< private >*/
gpointer _gst_reserved[GST_PADDING];
};
struct _GstElementFactoryClass {
GstPluginFeatureClass parent_class;
gpointer _gst_reserved[GST_PADDING];
};
GType gst_element_factory_get_type (void);
GstElementFactory * gst_element_factory_find (const gchar *name);
GType gst_element_factory_get_element_type (GstElementFactory *factory);
G_CONST_RETURN gchar * gst_element_factory_get_metadata (GstElementFactory *factoryi, const gchar *key);
guint gst_element_factory_get_num_pad_templates (GstElementFactory *factory);
G_CONST_RETURN GList * gst_element_factory_get_static_pad_templates (GstElementFactory *factory);
gint gst_element_factory_get_uri_type (GstElementFactory *factory);
gchar ** gst_element_factory_get_uri_protocols (GstElementFactory *factory);
gboolean gst_element_factory_has_interface (GstElementFactory *factory,
const gchar *interfacename);
GstElement* gst_element_factory_create (GstElementFactory *factory,
const gchar *name);
GstElement* gst_element_factory_make (const gchar *factoryname, const gchar *name);
/* FIXME 0.11: move these two into our private headers */
void __gst_element_factory_add_static_pad_template (GstElementFactory *elementfactory,
GstStaticPadTemplate *templ);
void __gst_element_factory_add_interface (GstElementFactory *elementfactory,
const gchar *interfacename);
gboolean gst_element_register (GstPlugin *plugin, const gchar *name,
guint rank, GType type);
/* Factory list functions */
/**
* GstFactoryListType:
* @GST_ELEMENT_FACTORY_TYPE_DECODER: Decoder elements
* @GST_ELEMENT_FACTORY_TYPE_ENCODER: Encoder elements
* @GST_ELEMENT_FACTORY_TYPE_SINK: Sink elements
* @GST_ELEMENT_FACTORY_TYPE_SRC: Source elements
* @GST_ELEMENT_FACTORY_TYPE_MUXER: Muxer elements
* @GST_ELEMENT_FACTORY_TYPE_DEMUXER: Demuxer elements
* @GST_ELEMENT_FACTORY_TYPE_PARSER: Parser elements
* @GST_ELEMENT_FACTORY_TYPE_PAYLOADER: Payloader elements
* @GST_ELEMENT_FACTORY_TYPE_DEPAYLOADER: Depayloader elements
* @GST_ELEMENT_FACTORY_TYPE_MAX_ELEMENTS: Private, do not use
* @GST_ELEMENT_FACTORY_TYPE_MEDIA_VIDEO: Elements handling video media types
* @GST_ELEMENT_FACTORY_TYPE_MEDIA_AUDIO: Elements handling audio media types
* @GST_ELEMENT_FACTORY_TYPE_MEDIA_IMAGE: Elements handling image media types
* @GST_ELEMENT_FACTORY_TYPE_MEDIA_SUBTITLE: Elements handling subtitle media types
* @GST_ELEMENT_FACTORY_TYPE_MEDIA_METADATA: Elements handling metadata media types
*
* The type of #GstElementFactory to filter.
*
* All @GstFactoryListType up to @GST_ELEMENT_FACTORY_TYPE_MAX_ELEMENTS are exclusive.
*
* If one or more of the MEDIA types are specified, then only elements
* matching the specified media types will be selected.
*
* Since: 0.10.31
*/
typedef guint64 GstElementFactoryListType;
#define GST_ELEMENT_FACTORY_TYPE_DECODER (G_GUINT64_CONSTANT (1) << 0)
#define GST_ELEMENT_FACTORY_TYPE_ENCODER (G_GUINT64_CONSTANT (1) << 1)
#define GST_ELEMENT_FACTORY_TYPE_SINK (G_GUINT64_CONSTANT (1) << 2)
#define GST_ELEMENT_FACTORY_TYPE_SRC (G_GUINT64_CONSTANT (1) << 3)
#define GST_ELEMENT_FACTORY_TYPE_MUXER (G_GUINT64_CONSTANT (1) << 4)
#define GST_ELEMENT_FACTORY_TYPE_DEMUXER (G_GUINT64_CONSTANT (1) << 5)
#define GST_ELEMENT_FACTORY_TYPE_PARSER (G_GUINT64_CONSTANT (1) << 6)
#define GST_ELEMENT_FACTORY_TYPE_PAYLOADER (G_GUINT64_CONSTANT (1) << 7)
#define GST_ELEMENT_FACTORY_TYPE_DEPAYLOADER (G_GUINT64_CONSTANT (1) << 8)
#define GST_ELEMENT_FACTORY_TYPE_FORMATTER (G_GUINT64_CONSTANT (1) << 9)
#define GST_ELEMENT_FACTORY_TYPE_MAX_ELEMENTS (G_GUINT64_CONSTANT (1) << 48)
#define GST_ELEMENT_FACTORY_TYPE_MEDIA_VIDEO (G_GUINT64_CONSTANT (1) << 49)
#define GST_ELEMENT_FACTORY_TYPE_MEDIA_AUDIO (G_GUINT64_CONSTANT (1) << 50)
#define GST_ELEMENT_FACTORY_TYPE_MEDIA_IMAGE (G_GUINT64_CONSTANT (1) << 51)
#define GST_ELEMENT_FACTORY_TYPE_MEDIA_SUBTITLE (G_GUINT64_CONSTANT (1) << 52)
#define GST_ELEMENT_FACTORY_TYPE_MEDIA_METADATA (G_GUINT64_CONSTANT (1) << 53)
/**
* GST_ELEMENT_FACTORY_TYPE_ANY:
*
* Elements of any of the defined GST_ELEMENT_FACTORY_LIST types
*
* Since: 0.10.31
*/
#define GST_ELEMENT_FACTORY_TYPE_ANY ((G_GUINT64_CONSTANT (1) << 49) - 1)
/**
* GST_ELEMENT_FACTORY_TYPE_MEDIA_ANY:
*
* Elements matching any of the defined GST_ELEMENT_FACTORY_TYPE_MEDIA types
*
* Note: Do not use this if you wish to not filter against any of the defined
* media types. If you wish to do this, simply don't specify any
* GST_ELEMENT_FACTORY_TYPE_MEDIA flag.
*
* Since: 0.10.31
*/
#define GST_ELEMENT_FACTORY_TYPE_MEDIA_ANY (~G_GUINT64_CONSTANT (0) << 48)
/**
* GST_ELEMENT_FACTORY_TYPE_VIDEO_ENCODER:
*
* All encoders handling video or image media types
*
* Since: 0.10.31
*/
#define GST_ELEMENT_FACTORY_TYPE_VIDEO_ENCODER (GST_ELEMENT_FACTORY_TYPE_ENCODER | GST_ELEMENT_FACTORY_TYPE_MEDIA_VIDEO | GST_ELEMENT_FACTORY_TYPE_MEDIA_IMAGE)
/**
* GST_ELEMENT_FACTORY_TYPE_AUDIO_ENCODER:
*
* All encoders handling audio media types
*
* Since: 0.10.31
*/
#define GST_ELEMENT_FACTORY_TYPE_AUDIO_ENCODER (GST_ELEMENT_FACTORY_TYPE_ENCODER | GST_ELEMENT_FACTORY_TYPE_MEDIA_AUDIO)
/**
* GST_ELEMENT_FACTORY_TYPE_AUDIOVIDEO_SINKS:
*
* All sinks handling audio, video or image media types
*
* Since: 0.10.31
*/
#define GST_ELEMENT_FACTORY_TYPE_AUDIOVIDEO_SINKS (GST_ELEMENT_FACTORY_TYPE_SINK | GST_ELEMENT_FACTORY_TYPE_MEDIA_AUDIO | GST_ELEMENT_FACTORY_TYPE_MEDIA_VIDEO | GST_ELEMENT_FACTORY_TYPE_MEDIA_IMAGE)
/**
* GST_ELEMENT_FACTORY_TYPE_DECODABLE:
*
* All elements used to 'decode' streams (decoders, demuxers, parsers, depayloaders)
*
* Since: 0.10.31
*/
#define GST_ELEMENT_FACTORY_TYPE_DECODABLE \
(GST_ELEMENT_FACTORY_TYPE_DECODER | GST_ELEMENT_FACTORY_TYPE_DEMUXER | GST_ELEMENT_FACTORY_TYPE_DEPAYLOADER | GST_ELEMENT_FACTORY_TYPE_PARSER)
/* Element klass defines */
#define GST_ELEMENT_FACTORY_KLASS_DECODER "Decoder"
#define GST_ELEMENT_FACTORY_KLASS_ENCODER "Encoder"
#define GST_ELEMENT_FACTORY_KLASS_SINK "Sink"
#define GST_ELEMENT_FACTORY_KLASS_SRC "Source"
#define GST_ELEMENT_FACTORY_KLASS_MUXER "Muxer"
#define GST_ELEMENT_FACTORY_KLASS_DEMUXER "Demuxer"
#define GST_ELEMENT_FACTORY_KLASS_PARSER "Parser"
#define GST_ELEMENT_FACTORY_KLASS_PAYLOADER "Payloader"
#define GST_ELEMENT_FACTORY_KLASS_DEPAYLOADER "Depayloader"
#define GST_ELEMENT_FACTORY_KLASS_FORMATTER "Formatter"
#define GST_ELEMENT_FACTORY_KLASS_MEDIA_VIDEO "Video"
#define GST_ELEMENT_FACTORY_KLASS_MEDIA_AUDIO "Audio"
#define GST_ELEMENT_FACTORY_KLASS_MEDIA_IMAGE "Image"
#define GST_ELEMENT_FACTORY_KLASS_MEDIA_SUBTITLE "Subtitle"
#define GST_ELEMENT_FACTORY_KLASS_MEDIA_METADATA "Metadata"
gboolean gst_element_factory_list_is_type (GstElementFactory *factory,
GstElementFactoryListType type);
GList * gst_element_factory_list_get_elements (GstElementFactoryListType type,
GstRank minrank);
GList * gst_element_factory_list_filter (GList *list, const GstCaps *caps,
GstPadDirection direction,
gboolean subsetonly);
G_END_DECLS
#endif /* __GST_ELEMENT_FACTORY_H__ */