2 * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
3 * 2000,2004 Wim Taymans <wim@fluendo.com>
5 * gstelement.h: Header for GstElement
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Library General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Library General Public License for more details.
17 * You should have received a copy of the GNU Library General Public
18 * License along with this library; if not, write to the
19 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 * Boston, MA 02111-1307, USA.
24 #ifndef __GST_ELEMENT_FACTORY_H__
25 #define __GST_ELEMENT_FACTORY_H__
27 typedef struct _GstElementFactory GstElementFactory;
28 typedef struct _GstElementFactoryClass GstElementFactoryClass;
30 #include <gst/gstconfig.h>
31 #include <gst/gstelement.h>
32 #include <gst/gstobject.h>
33 #include <gst/gstplugin.h>
34 #include <gst/gstpluginfeature.h>
35 #include <gst/gstpadtemplate.h>
36 #include <gst/gstiterator.h>
37 #include <gst/gsturi.h>
41 #define GST_TYPE_ELEMENT_FACTORY (gst_element_factory_get_type())
42 #define GST_ELEMENT_FACTORY(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_ELEMENT_FACTORY,\
44 #define GST_ELEMENT_FACTORY_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_ELEMENT_FACTORY,\
45 GstElementFactoryClass))
46 #define GST_IS_ELEMENT_FACTORY(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_ELEMENT_FACTORY))
47 #define GST_IS_ELEMENT_FACTORY_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_ELEMENT_FACTORY))
48 #define GST_ELEMENT_FACTORY_CAST(obj) ((GstElementFactory *)(obj))
53 * The opaque #GstElementFactory data structure.
55 struct _GstElementFactory {
56 GstPluginFeature parent;
58 GType type; /* unique GType of element or 0 if not loaded */
62 GList * staticpadtemplates; /* GstStaticPadTemplate list */
63 guint numpadtemplates;
65 /* URI interface stuff */
67 gchar ** uri_protocols;
69 GList * interfaces; /* interface type names this element implements */
72 gpointer _gst_reserved[GST_PADDING];
75 struct _GstElementFactoryClass {
76 GstPluginFeatureClass parent_class;
78 gpointer _gst_reserved[GST_PADDING];
81 GType gst_element_factory_get_type (void);
83 GstElementFactory * gst_element_factory_find (const gchar *name);
85 GType gst_element_factory_get_element_type (GstElementFactory *factory);
87 const gchar * gst_element_factory_get_metadata (GstElementFactory *factory, const gchar *key);
89 guint gst_element_factory_get_num_pad_templates (GstElementFactory *factory);
90 const GList * gst_element_factory_get_static_pad_templates (GstElementFactory *factory);
92 GstURIType gst_element_factory_get_uri_type (GstElementFactory *factory);
93 const gchar * const * gst_element_factory_get_uri_protocols (GstElementFactory *factory);
95 gboolean gst_element_factory_has_interface (GstElementFactory *factory,
96 const gchar *interfacename);
98 GstElement* gst_element_factory_create (GstElementFactory *factory,
99 const gchar *name) G_GNUC_MALLOC;
100 GstElement* gst_element_factory_make (const gchar *factoryname, const gchar *name) G_GNUC_MALLOC;
102 gboolean gst_element_register (GstPlugin *plugin, const gchar *name,
103 guint rank, GType type);
105 /* Factory list functions */
108 * GstFactoryListType:
109 * @GST_ELEMENT_FACTORY_TYPE_DECODER: Decoder elements
110 * @GST_ELEMENT_FACTORY_TYPE_ENCODER: Encoder elements
111 * @GST_ELEMENT_FACTORY_TYPE_SINK: Sink elements
112 * @GST_ELEMENT_FACTORY_TYPE_SRC: Source elements
113 * @GST_ELEMENT_FACTORY_TYPE_MUXER: Muxer elements
114 * @GST_ELEMENT_FACTORY_TYPE_DEMUXER: Demuxer elements
115 * @GST_ELEMENT_FACTORY_TYPE_PARSER: Parser elements
116 * @GST_ELEMENT_FACTORY_TYPE_PAYLOADER: Payloader elements
117 * @GST_ELEMENT_FACTORY_TYPE_DEPAYLOADER: Depayloader elements
118 * @GST_ELEMENT_FACTORY_TYPE_MAX_ELEMENTS: Private, do not use
119 * @GST_ELEMENT_FACTORY_TYPE_MEDIA_VIDEO: Elements handling video media types
120 * @GST_ELEMENT_FACTORY_TYPE_MEDIA_AUDIO: Elements handling audio media types
121 * @GST_ELEMENT_FACTORY_TYPE_MEDIA_IMAGE: Elements handling image media types
122 * @GST_ELEMENT_FACTORY_TYPE_MEDIA_SUBTITLE: Elements handling subtitle media types
123 * @GST_ELEMENT_FACTORY_TYPE_MEDIA_METADATA: Elements handling metadata media types
125 * The type of #GstElementFactory to filter.
127 * All @GstFactoryListType up to @GST_ELEMENT_FACTORY_TYPE_MAX_ELEMENTS are exclusive.
129 * If one or more of the MEDIA types are specified, then only elements
130 * matching the specified media types will be selected.
135 typedef guint64 GstElementFactoryListType;
137 #define GST_ELEMENT_FACTORY_TYPE_DECODER (G_GUINT64_CONSTANT (1) << 0)
138 #define GST_ELEMENT_FACTORY_TYPE_ENCODER (G_GUINT64_CONSTANT (1) << 1)
139 #define GST_ELEMENT_FACTORY_TYPE_SINK (G_GUINT64_CONSTANT (1) << 2)
140 #define GST_ELEMENT_FACTORY_TYPE_SRC (G_GUINT64_CONSTANT (1) << 3)
141 #define GST_ELEMENT_FACTORY_TYPE_MUXER (G_GUINT64_CONSTANT (1) << 4)
142 #define GST_ELEMENT_FACTORY_TYPE_DEMUXER (G_GUINT64_CONSTANT (1) << 5)
143 #define GST_ELEMENT_FACTORY_TYPE_PARSER (G_GUINT64_CONSTANT (1) << 6)
144 #define GST_ELEMENT_FACTORY_TYPE_PAYLOADER (G_GUINT64_CONSTANT (1) << 7)
145 #define GST_ELEMENT_FACTORY_TYPE_DEPAYLOADER (G_GUINT64_CONSTANT (1) << 8)
146 #define GST_ELEMENT_FACTORY_TYPE_FORMATTER (G_GUINT64_CONSTANT (1) << 9)
148 #define GST_ELEMENT_FACTORY_TYPE_MAX_ELEMENTS (G_GUINT64_CONSTANT (1) << 48)
150 #define GST_ELEMENT_FACTORY_TYPE_MEDIA_VIDEO (G_GUINT64_CONSTANT (1) << 49)
151 #define GST_ELEMENT_FACTORY_TYPE_MEDIA_AUDIO (G_GUINT64_CONSTANT (1) << 50)
152 #define GST_ELEMENT_FACTORY_TYPE_MEDIA_IMAGE (G_GUINT64_CONSTANT (1) << 51)
153 #define GST_ELEMENT_FACTORY_TYPE_MEDIA_SUBTITLE (G_GUINT64_CONSTANT (1) << 52)
154 #define GST_ELEMENT_FACTORY_TYPE_MEDIA_METADATA (G_GUINT64_CONSTANT (1) << 53)
157 * GST_ELEMENT_FACTORY_TYPE_ANY:
159 * Elements of any of the defined GST_ELEMENT_FACTORY_LIST types
163 #define GST_ELEMENT_FACTORY_TYPE_ANY ((G_GUINT64_CONSTANT (1) << 49) - 1)
166 * GST_ELEMENT_FACTORY_TYPE_MEDIA_ANY:
168 * Elements matching any of the defined GST_ELEMENT_FACTORY_TYPE_MEDIA types
170 * Note: Do not use this if you wish to not filter against any of the defined
171 * media types. If you wish to do this, simply don't specify any
172 * GST_ELEMENT_FACTORY_TYPE_MEDIA flag.
176 #define GST_ELEMENT_FACTORY_TYPE_MEDIA_ANY (~G_GUINT64_CONSTANT (0) << 48)
179 * GST_ELEMENT_FACTORY_TYPE_VIDEO_ENCODER:
181 * All encoders handling video or image media types
185 #define GST_ELEMENT_FACTORY_TYPE_VIDEO_ENCODER (GST_ELEMENT_FACTORY_TYPE_ENCODER | GST_ELEMENT_FACTORY_TYPE_MEDIA_VIDEO | GST_ELEMENT_FACTORY_TYPE_MEDIA_IMAGE)
188 * GST_ELEMENT_FACTORY_TYPE_AUDIO_ENCODER:
190 * All encoders handling audio media types
194 #define GST_ELEMENT_FACTORY_TYPE_AUDIO_ENCODER (GST_ELEMENT_FACTORY_TYPE_ENCODER | GST_ELEMENT_FACTORY_TYPE_MEDIA_AUDIO)
197 * GST_ELEMENT_FACTORY_TYPE_AUDIOVIDEO_SINKS:
199 * All sinks handling audio, video or image media types
203 #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)
206 * GST_ELEMENT_FACTORY_TYPE_DECODABLE:
208 * All elements used to 'decode' streams (decoders, demuxers, parsers, depayloaders)
212 #define GST_ELEMENT_FACTORY_TYPE_DECODABLE \
213 (GST_ELEMENT_FACTORY_TYPE_DECODER | GST_ELEMENT_FACTORY_TYPE_DEMUXER | GST_ELEMENT_FACTORY_TYPE_DEPAYLOADER | GST_ELEMENT_FACTORY_TYPE_PARSER)
215 /* Element klass defines */
216 #define GST_ELEMENT_FACTORY_KLASS_DECODER "Decoder"
217 #define GST_ELEMENT_FACTORY_KLASS_ENCODER "Encoder"
218 #define GST_ELEMENT_FACTORY_KLASS_SINK "Sink"
219 #define GST_ELEMENT_FACTORY_KLASS_SRC "Source"
220 #define GST_ELEMENT_FACTORY_KLASS_MUXER "Muxer"
221 #define GST_ELEMENT_FACTORY_KLASS_DEMUXER "Demuxer"
222 #define GST_ELEMENT_FACTORY_KLASS_PARSER "Parser"
223 #define GST_ELEMENT_FACTORY_KLASS_PAYLOADER "Payloader"
224 #define GST_ELEMENT_FACTORY_KLASS_DEPAYLOADER "Depayloader"
225 #define GST_ELEMENT_FACTORY_KLASS_FORMATTER "Formatter"
227 #define GST_ELEMENT_FACTORY_KLASS_MEDIA_VIDEO "Video"
228 #define GST_ELEMENT_FACTORY_KLASS_MEDIA_AUDIO "Audio"
229 #define GST_ELEMENT_FACTORY_KLASS_MEDIA_IMAGE "Image"
230 #define GST_ELEMENT_FACTORY_KLASS_MEDIA_SUBTITLE "Subtitle"
231 #define GST_ELEMENT_FACTORY_KLASS_MEDIA_METADATA "Metadata"
233 gboolean gst_element_factory_list_is_type (GstElementFactory *factory,
234 GstElementFactoryListType type);
236 GList * gst_element_factory_list_get_elements (GstElementFactoryListType type,
237 GstRank minrank) G_GNUC_MALLOC;
240 GList * gst_element_factory_list_filter (GList *list, const GstCaps *caps,
241 GstPadDirection direction,
242 gboolean subsetonly) G_GNUC_MALLOC;
245 #endif /* __GST_ELEMENT_FACTORY_H__ */