1/* GStreamer
2 * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
3 * 2000,2004 Wim Taymans <wim@fluendo.com>
4 *
5 * gstelementfactory.h: Header for GstElementFactory
6 *
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.
11 *
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.
16 *
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., 51 Franklin St, Fifth Floor,
20 * Boston, MA 02110-1301, USA.
21 */
22
23
24#ifndef __GST_ELEMENT_FACTORY_H__
25#define __GST_ELEMENT_FACTORY_H__
26
27/**
28 * GstElementFactory:
29 *
30 * The opaque #GstElementFactory data structure.
31 */
32typedef struct _GstElementFactory GstElementFactory;
33typedef struct _GstElementFactoryClass GstElementFactoryClass;
34
35#include <gst/gstconfig.h>
36#include <gst/gstelement.h>
37#include <gst/gstpad.h>
38#include <gst/gstplugin.h>
39#include <gst/gstpluginfeature.h>
40#include <gst/gsturi.h>
41
42G_BEGIN_DECLS
43
44#define GST_TYPE_ELEMENT_FACTORY (gst_element_factory_get_type())
45#define GST_ELEMENT_FACTORY(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_ELEMENT_FACTORY,\
46 GstElementFactory))
47#define GST_ELEMENT_FACTORY_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_ELEMENT_FACTORY,\
48 GstElementFactoryClass))
49#define GST_IS_ELEMENT_FACTORY(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_ELEMENT_FACTORY))
50#define GST_IS_ELEMENT_FACTORY_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_ELEMENT_FACTORY))
51#define GST_ELEMENT_FACTORY_CAST(obj) ((GstElementFactory *)(obj))
52
53GST_API
54GType gst_element_factory_get_type (void);
55
56GST_API
57GstElementFactory * gst_element_factory_find (const gchar *name);
58
59GST_API
60GType gst_element_factory_get_element_type (GstElementFactory *factory);
61
62GST_API
63const gchar * gst_element_factory_get_metadata (GstElementFactory *factory, const gchar *key);
64
65GST_API
66gchar ** gst_element_factory_get_metadata_keys (GstElementFactory *factory);
67
68GST_API
69guint gst_element_factory_get_num_pad_templates (GstElementFactory *factory);
70
71GST_API
72const GList * gst_element_factory_get_static_pad_templates (GstElementFactory *factory);
73
74GST_API
75GstURIType gst_element_factory_get_uri_type (GstElementFactory *factory);
76
77GST_API
78const gchar * const * gst_element_factory_get_uri_protocols (GstElementFactory *factory);
79
80GST_API
81gboolean gst_element_factory_has_interface (GstElementFactory *factory,
82 const gchar *interfacename);
83GST_API
84GstElement* gst_element_factory_create (GstElementFactory *factory,
85 const gchar *name) G_GNUC_MALLOC;
86GST_API
87GstElement* gst_element_factory_create_full (GstElementFactory * factory,
88 const gchar * first, ...) G_GNUC_MALLOC;
89GST_API
90GstElement * gst_element_factory_create_valist (GstElementFactory * factory,
91 const gchar * first, va_list properties) G_GNUC_MALLOC;
92GST_API
93GstElement * gst_element_factory_create_with_properties (GstElementFactory * factory,
94 guint n, const gchar *names[], const GValue values[]) G_GNUC_MALLOC;
95GST_API
96GstElement* gst_element_factory_make (const gchar *factoryname, const gchar *name) G_GNUC_MALLOC;
97
98GST_API
99GstElement* gst_element_factory_make_full (const gchar *factoryname,
100 const gchar *first, ...) G_GNUC_MALLOC;
101GST_API
102GstElement* gst_element_factory_make_valist (const gchar *factoryname,
103 const gchar *first, va_list properties) G_GNUC_MALLOC;
104GST_API
105GstElement* gst_element_factory_make_with_properties (const gchar *factoryname,
106 guint n, const gchar *names[], const GValue values[]) G_GNUC_MALLOC;
107GST_API
108gboolean gst_element_register (GstPlugin *plugin, const gchar *name,
109 guint rank, GType type);
110
111GST_API
112void gst_element_type_set_skip_documentation (GType type);
113
114GST_API
115gboolean gst_element_factory_get_skip_documentation (GstElementFactory * factory);
116
117/* Factory list functions */
118
119/**
120 * GstFactoryListType:
121 * @GST_ELEMENT_FACTORY_TYPE_DECODER: Decoder elements
122 * @GST_ELEMENT_FACTORY_TYPE_ENCODER: Encoder elements
123 * @GST_ELEMENT_FACTORY_TYPE_SINK: Sink elements
124 * @GST_ELEMENT_FACTORY_TYPE_SRC: Source elements
125 * @GST_ELEMENT_FACTORY_TYPE_MUXER: Muxer elements
126 * @GST_ELEMENT_FACTORY_TYPE_DEMUXER: Demuxer elements
127 * @GST_ELEMENT_FACTORY_TYPE_PARSER: Parser elements
128 * @GST_ELEMENT_FACTORY_TYPE_PAYLOADER: Payloader elements
129 * @GST_ELEMENT_FACTORY_TYPE_DEPAYLOADER: Depayloader elements
130 * @GST_ELEMENT_FACTORY_TYPE_DECRYPTOR: Elements handling decryption (Since: 1.6)
131 * @GST_ELEMENT_FACTORY_TYPE_ENCRYPTOR: Elements handling encryption (Since: 1.6)
132 * @GST_ELEMENT_FACTORY_TYPE_HARDWARE: Hardware based elements (Since: 1.18)
133 * @GST_ELEMENT_FACTORY_TYPE_MAX_ELEMENTS: Private, do not use
134 * @GST_ELEMENT_FACTORY_TYPE_MEDIA_VIDEO: Elements handling video media types
135 * @GST_ELEMENT_FACTORY_TYPE_MEDIA_AUDIO: Elements handling audio media types
136 * @GST_ELEMENT_FACTORY_TYPE_MEDIA_IMAGE: Elements handling image media types
137 * @GST_ELEMENT_FACTORY_TYPE_MEDIA_SUBTITLE: Elements handling subtitle media types
138 * @GST_ELEMENT_FACTORY_TYPE_MEDIA_METADATA: Elements handling metadata media types
139 *
140 * The type of #GstElementFactory to filter.
141 *
142 * All @GstFactoryListType up to @GST_ELEMENT_FACTORY_TYPE_MAX_ELEMENTS are exclusive.
143 *
144 * If one or more of the MEDIA types are specified, then only elements
145 * matching the specified media types will be selected.
146 */
147
148/**
149 * GstElementFactoryListType:
150 *
151 * A type defining the type of an element factory.
152 */
153typedef guint64 GstElementFactoryListType;
154
155#define GST_ELEMENT_FACTORY_TYPE_DECODER ((GstElementFactoryListType)(G_GUINT64_CONSTANT (1) << 0))
156#define GST_ELEMENT_FACTORY_TYPE_ENCODER ((GstElementFactoryListType)(G_GUINT64_CONSTANT (1) << 1))
157#define GST_ELEMENT_FACTORY_TYPE_SINK ((GstElementFactoryListType)(G_GUINT64_CONSTANT (1) << 2))
158#define GST_ELEMENT_FACTORY_TYPE_SRC ((GstElementFactoryListType)(G_GUINT64_CONSTANT (1) << 3))
159#define GST_ELEMENT_FACTORY_TYPE_MUXER ((GstElementFactoryListType)(G_GUINT64_CONSTANT (1) << 4))
160#define GST_ELEMENT_FACTORY_TYPE_DEMUXER ((GstElementFactoryListType)(G_GUINT64_CONSTANT (1) << 5))
161#define GST_ELEMENT_FACTORY_TYPE_PARSER ((GstElementFactoryListType)(G_GUINT64_CONSTANT (1) << 6))
162#define GST_ELEMENT_FACTORY_TYPE_PAYLOADER ((GstElementFactoryListType)(G_GUINT64_CONSTANT (1) << 7))
163#define GST_ELEMENT_FACTORY_TYPE_DEPAYLOADER ((GstElementFactoryListType)(G_GUINT64_CONSTANT (1) << 8))
164#define GST_ELEMENT_FACTORY_TYPE_FORMATTER ((GstElementFactoryListType)(G_GUINT64_CONSTANT (1) << 9))
165#define GST_ELEMENT_FACTORY_TYPE_DECRYPTOR ((GstElementFactoryListType)(G_GUINT64_CONSTANT (1) << 10))
166#define GST_ELEMENT_FACTORY_TYPE_ENCRYPTOR ((GstElementFactoryListType)(G_GUINT64_CONSTANT (1) << 11))
167#define GST_ELEMENT_FACTORY_TYPE_HARDWARE ((GstElementFactoryListType)(G_GUINT64_CONSTANT (1) << 12))
168
169#define GST_ELEMENT_FACTORY_TYPE_MAX_ELEMENTS ((GstElementFactoryListType)(G_GUINT64_CONSTANT (1) << 48))
170
171#define GST_ELEMENT_FACTORY_TYPE_MEDIA_VIDEO ((GstElementFactoryListType)(G_GUINT64_CONSTANT (1) << 49))
172#define GST_ELEMENT_FACTORY_TYPE_MEDIA_AUDIO ((GstElementFactoryListType)(G_GUINT64_CONSTANT (1) << 50))
173#define GST_ELEMENT_FACTORY_TYPE_MEDIA_IMAGE ((GstElementFactoryListType)(G_GUINT64_CONSTANT (1) << 51))
174#define GST_ELEMENT_FACTORY_TYPE_MEDIA_SUBTITLE ((GstElementFactoryListType)(G_GUINT64_CONSTANT (1) << 52))
175#define GST_ELEMENT_FACTORY_TYPE_MEDIA_METADATA ((GstElementFactoryListType)(G_GUINT64_CONSTANT (1) << 53))
176
177/**
178 * GST_ELEMENT_FACTORY_TYPE_ANY: (value 562949953421311) (type GstElementFactoryListType)
179 *
180 * Elements of any of the defined GST_ELEMENT_FACTORY_LIST types
181 */
182#define GST_ELEMENT_FACTORY_TYPE_ANY ((GstElementFactoryListType)((G_GUINT64_CONSTANT (1) << 49) - 1))
183
184/**
185 * GST_ELEMENT_FACTORY_TYPE_MEDIA_ANY: (value 18446462598732840960) (type GstElementFactoryListType)
186 *
187 * Elements matching any of the defined GST_ELEMENT_FACTORY_TYPE_MEDIA types
188 *
189 * Note: Do not use this if you wish to not filter against any of the defined
190 * media types. If you wish to do this, simply don't specify any
191 * GST_ELEMENT_FACTORY_TYPE_MEDIA flag.
192 */
193#define GST_ELEMENT_FACTORY_TYPE_MEDIA_ANY ((GstElementFactoryListType)(~G_GUINT64_CONSTANT (0) << 48))
194
195/**
196 * GST_ELEMENT_FACTORY_TYPE_VIDEO_ENCODER: (value 2814749767106562) (type GstElementFactoryListType)
197 *
198 * All encoders handling video or image media types
199 */
200#define GST_ELEMENT_FACTORY_TYPE_VIDEO_ENCODER ((GstElementFactoryListType)(GST_ELEMENT_FACTORY_TYPE_ENCODER | GST_ELEMENT_FACTORY_TYPE_MEDIA_VIDEO | GST_ELEMENT_FACTORY_TYPE_MEDIA_IMAGE))
201
202/**
203 * GST_ELEMENT_FACTORY_TYPE_AUDIO_ENCODER: (value 1125899906842626) (type GstElementFactoryListType)
204 *
205 * All encoders handling audio media types
206 */
207#define GST_ELEMENT_FACTORY_TYPE_AUDIO_ENCODER ((GstElementFactoryListType)(GST_ELEMENT_FACTORY_TYPE_ENCODER | GST_ELEMENT_FACTORY_TYPE_MEDIA_AUDIO))
208
209/**
210 * GST_ELEMENT_FACTORY_TYPE_AUDIOVIDEO_SINKS: (value 3940649673949188) (type GstElementFactoryListType)
211 *
212 * All sinks handling audio, video or image media types
213 */
214#define GST_ELEMENT_FACTORY_TYPE_AUDIOVIDEO_SINKS ((GstElementFactoryListType)(GST_ELEMENT_FACTORY_TYPE_SINK | GST_ELEMENT_FACTORY_TYPE_MEDIA_AUDIO | GST_ELEMENT_FACTORY_TYPE_MEDIA_VIDEO | GST_ELEMENT_FACTORY_TYPE_MEDIA_IMAGE))
215
216/**
217 * GST_ELEMENT_FACTORY_TYPE_DECODABLE: (value 1377) (type GstElementFactoryListType)
218 *
219 * All elements used to 'decode' streams (decoders, demuxers, parsers, depayloaders)
220 */
221#define GST_ELEMENT_FACTORY_TYPE_DECODABLE \
222 ((GstElementFactoryListType)(GST_ELEMENT_FACTORY_TYPE_DECODER | GST_ELEMENT_FACTORY_TYPE_DEMUXER | GST_ELEMENT_FACTORY_TYPE_DEPAYLOADER | GST_ELEMENT_FACTORY_TYPE_PARSER | GST_ELEMENT_FACTORY_TYPE_DECRYPTOR))
223
224/* Element klass defines */
225#define GST_ELEMENT_FACTORY_KLASS_DECODER "Decoder"
226#define GST_ELEMENT_FACTORY_KLASS_ENCODER "Encoder"
227#define GST_ELEMENT_FACTORY_KLASS_SINK "Sink"
228#define GST_ELEMENT_FACTORY_KLASS_SRC "Source"
229#define GST_ELEMENT_FACTORY_KLASS_MUXER "Muxer"
230#define GST_ELEMENT_FACTORY_KLASS_DEMUXER "Demuxer"
231#define GST_ELEMENT_FACTORY_KLASS_PARSER "Parser"
232#define GST_ELEMENT_FACTORY_KLASS_PAYLOADER "Payloader"
233#define GST_ELEMENT_FACTORY_KLASS_DEPAYLOADER "Depayloader"
234#define GST_ELEMENT_FACTORY_KLASS_FORMATTER "Formatter"
235#define GST_ELEMENT_FACTORY_KLASS_DECRYPTOR "Decryptor"
236#define GST_ELEMENT_FACTORY_KLASS_ENCRYPTOR "Encryptor"
237
238#define GST_ELEMENT_FACTORY_KLASS_MEDIA_VIDEO "Video"
239#define GST_ELEMENT_FACTORY_KLASS_MEDIA_AUDIO "Audio"
240#define GST_ELEMENT_FACTORY_KLASS_MEDIA_IMAGE "Image"
241#define GST_ELEMENT_FACTORY_KLASS_MEDIA_SUBTITLE "Subtitle"
242#define GST_ELEMENT_FACTORY_KLASS_MEDIA_METADATA "Metadata"
243
244/**
245 * GST_ELEMENT_FACTORY_KLASS_HARDWARE:
246 *
247 * Elements interacting with hardware devices should specify this classifier in
248 * their metadata. You may need to put the element in "READY" state to test if
249 * the hardware is present in the system.
250 *
251 * Since: 1.16
252 */
253#define GST_ELEMENT_FACTORY_KLASS_HARDWARE "Hardware"
254
255GST_API
256gboolean gst_element_factory_list_is_type (GstElementFactory *factory,
257 GstElementFactoryListType type);
258
259GST_API
260GList * gst_element_factory_list_get_elements (GstElementFactoryListType type,
261 GstRank minrank) G_GNUC_MALLOC;
262
263
264GST_API
265GList * gst_element_factory_list_filter (GList *list, const GstCaps *caps,
266 GstPadDirection direction,
267 gboolean subsetonly) G_GNUC_MALLOC;
268G_DEFINE_AUTOPTR_CLEANUP_FUNC(GstElementFactory, gst_object_unref)
269
270G_END_DECLS
271
272#endif /* __GST_ELEMENT_FACTORY_H__ */
273

source code of include/gstreamer-1.0/gst/gstelementfactory.h