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e1dc60524e
Implement GstDynamicTypeFactory as a new registry feature. GstDynamicTypeFactory provides a way of registering a GType into the registry, such that it will be registered as a dynamic type when the registry is loaded, and then automatically loaded if the type is needed during caps parsing. This allows using non-core types in pad templates, by loading a registry feature to create the GType on the fly. https://bugzilla.gnome.org/show_bug.cgi?id=750079
214 lines
10 KiB
C
214 lines
10 KiB
C
/* GStreamer
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* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
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* 2000,2004 Wim Taymans <wim@fluendo.com>
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*
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* gstelementfactory.h: Header for GstElementFactory
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef __GST_ELEMENT_FACTORY_H__
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#define __GST_ELEMENT_FACTORY_H__
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/**
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* GstElementFactory:
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*
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* The opaque #GstElementFactory data structure.
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*/
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typedef struct _GstElementFactory GstElementFactory;
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typedef struct _GstElementFactoryClass GstElementFactoryClass;
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#include <gst/gstconfig.h>
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#include <gst/gstelement.h>
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#include <gst/gstpad.h>
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#include <gst/gstplugin.h>
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#include <gst/gstpluginfeature.h>
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#include <gst/gsturi.h>
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G_BEGIN_DECLS
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#define GST_TYPE_ELEMENT_FACTORY (gst_element_factory_get_type())
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#define GST_ELEMENT_FACTORY(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_ELEMENT_FACTORY,\
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GstElementFactory))
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#define GST_ELEMENT_FACTORY_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_ELEMENT_FACTORY,\
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GstElementFactoryClass))
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#define GST_IS_ELEMENT_FACTORY(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_ELEMENT_FACTORY))
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#define GST_IS_ELEMENT_FACTORY_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_ELEMENT_FACTORY))
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#define GST_ELEMENT_FACTORY_CAST(obj) ((GstElementFactory *)(obj))
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GType gst_element_factory_get_type (void);
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GstElementFactory * gst_element_factory_find (const gchar *name);
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GType gst_element_factory_get_element_type (GstElementFactory *factory);
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const gchar * gst_element_factory_get_metadata (GstElementFactory *factory, const gchar *key);
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gchar ** gst_element_factory_get_metadata_keys (GstElementFactory *factory);
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guint gst_element_factory_get_num_pad_templates (GstElementFactory *factory);
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const GList * gst_element_factory_get_static_pad_templates (GstElementFactory *factory);
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GstURIType gst_element_factory_get_uri_type (GstElementFactory *factory);
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const gchar * const * gst_element_factory_get_uri_protocols (GstElementFactory *factory);
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gboolean gst_element_factory_has_interface (GstElementFactory *factory,
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const gchar *interfacename);
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GstElement* gst_element_factory_create (GstElementFactory *factory,
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const gchar *name) G_GNUC_MALLOC;
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GstElement* gst_element_factory_make (const gchar *factoryname, const gchar *name) G_GNUC_MALLOC;
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gboolean gst_element_register (GstPlugin *plugin, const gchar *name,
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guint rank, GType type);
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/* Factory list functions */
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/**
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* GstFactoryListType:
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* @GST_ELEMENT_FACTORY_TYPE_DECODER: Decoder elements
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* @GST_ELEMENT_FACTORY_TYPE_ENCODER: Encoder elements
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* @GST_ELEMENT_FACTORY_TYPE_SINK: Sink elements
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* @GST_ELEMENT_FACTORY_TYPE_SRC: Source elements
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* @GST_ELEMENT_FACTORY_TYPE_MUXER: Muxer elements
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* @GST_ELEMENT_FACTORY_TYPE_DEMUXER: Demuxer elements
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* @GST_ELEMENT_FACTORY_TYPE_PARSER: Parser elements
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* @GST_ELEMENT_FACTORY_TYPE_PAYLOADER: Payloader elements
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* @GST_ELEMENT_FACTORY_TYPE_DEPAYLOADER: Depayloader elements
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* @GST_ELEMENT_FACTORY_TYPE_DECRYPTOR: Elements handling decryption (Since 1.6)
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* @GST_ELEMENT_FACTORY_TYPE_ENCRYPTOR: Elements handling encryption (Since 1.6)
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* @GST_ELEMENT_FACTORY_TYPE_MAX_ELEMENTS: Private, do not use
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* @GST_ELEMENT_FACTORY_TYPE_MEDIA_VIDEO: Elements handling video media types
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* @GST_ELEMENT_FACTORY_TYPE_MEDIA_AUDIO: Elements handling audio media types
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* @GST_ELEMENT_FACTORY_TYPE_MEDIA_IMAGE: Elements handling image media types
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* @GST_ELEMENT_FACTORY_TYPE_MEDIA_SUBTITLE: Elements handling subtitle media types
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* @GST_ELEMENT_FACTORY_TYPE_MEDIA_METADATA: Elements handling metadata media types
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*
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* The type of #GstElementFactory to filter.
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*
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* All @GstFactoryListType up to @GST_ELEMENT_FACTORY_TYPE_MAX_ELEMENTS are exclusive.
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*
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* If one or more of the MEDIA types are specified, then only elements
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* matching the specified media types will be selected.
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*/
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typedef guint64 GstElementFactoryListType;
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#define GST_ELEMENT_FACTORY_TYPE_DECODER (G_GUINT64_CONSTANT (1) << 0)
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#define GST_ELEMENT_FACTORY_TYPE_ENCODER (G_GUINT64_CONSTANT (1) << 1)
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#define GST_ELEMENT_FACTORY_TYPE_SINK (G_GUINT64_CONSTANT (1) << 2)
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#define GST_ELEMENT_FACTORY_TYPE_SRC (G_GUINT64_CONSTANT (1) << 3)
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#define GST_ELEMENT_FACTORY_TYPE_MUXER (G_GUINT64_CONSTANT (1) << 4)
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#define GST_ELEMENT_FACTORY_TYPE_DEMUXER (G_GUINT64_CONSTANT (1) << 5)
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#define GST_ELEMENT_FACTORY_TYPE_PARSER (G_GUINT64_CONSTANT (1) << 6)
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#define GST_ELEMENT_FACTORY_TYPE_PAYLOADER (G_GUINT64_CONSTANT (1) << 7)
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#define GST_ELEMENT_FACTORY_TYPE_DEPAYLOADER (G_GUINT64_CONSTANT (1) << 8)
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#define GST_ELEMENT_FACTORY_TYPE_FORMATTER (G_GUINT64_CONSTANT (1) << 9)
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#define GST_ELEMENT_FACTORY_TYPE_DECRYPTOR (G_GUINT64_CONSTANT (1) << 10)
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#define GST_ELEMENT_FACTORY_TYPE_ENCRYPTOR (G_GUINT64_CONSTANT (1) << 11)
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#define GST_ELEMENT_FACTORY_TYPE_MAX_ELEMENTS (G_GUINT64_CONSTANT (1) << 48)
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#define GST_ELEMENT_FACTORY_TYPE_MEDIA_VIDEO (G_GUINT64_CONSTANT (1) << 49)
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#define GST_ELEMENT_FACTORY_TYPE_MEDIA_AUDIO (G_GUINT64_CONSTANT (1) << 50)
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#define GST_ELEMENT_FACTORY_TYPE_MEDIA_IMAGE (G_GUINT64_CONSTANT (1) << 51)
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#define GST_ELEMENT_FACTORY_TYPE_MEDIA_SUBTITLE (G_GUINT64_CONSTANT (1) << 52)
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#define GST_ELEMENT_FACTORY_TYPE_MEDIA_METADATA (G_GUINT64_CONSTANT (1) << 53)
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/**
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* GST_ELEMENT_FACTORY_TYPE_ANY: (value 562949953421311) (type GstElementFactoryListType)
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*
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* Elements of any of the defined GST_ELEMENT_FACTORY_LIST types
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*/
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#define GST_ELEMENT_FACTORY_TYPE_ANY ((G_GUINT64_CONSTANT (1) << 49) - 1)
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/**
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* GST_ELEMENT_FACTORY_TYPE_MEDIA_ANY: (value 18446462598732840960) (type GstElementFactoryListType)
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*
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* Elements matching any of the defined GST_ELEMENT_FACTORY_TYPE_MEDIA types
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*
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* Note: Do not use this if you wish to not filter against any of the defined
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* media types. If you wish to do this, simply don't specify any
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* GST_ELEMENT_FACTORY_TYPE_MEDIA flag.
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*/
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#define GST_ELEMENT_FACTORY_TYPE_MEDIA_ANY (~G_GUINT64_CONSTANT (0) << 48)
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/**
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* GST_ELEMENT_FACTORY_TYPE_VIDEO_ENCODER: (value 2814749767106562) (type GstElementFactoryListType)
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*
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* All encoders handling video or image media types
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*/
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#define GST_ELEMENT_FACTORY_TYPE_VIDEO_ENCODER (GST_ELEMENT_FACTORY_TYPE_ENCODER | GST_ELEMENT_FACTORY_TYPE_MEDIA_VIDEO | GST_ELEMENT_FACTORY_TYPE_MEDIA_IMAGE)
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/**
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* GST_ELEMENT_FACTORY_TYPE_AUDIO_ENCODER: (value 1125899906842626) (type GstElementFactoryListType)
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*
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* All encoders handling audio media types
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*/
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#define GST_ELEMENT_FACTORY_TYPE_AUDIO_ENCODER (GST_ELEMENT_FACTORY_TYPE_ENCODER | GST_ELEMENT_FACTORY_TYPE_MEDIA_AUDIO)
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/**
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* GST_ELEMENT_FACTORY_TYPE_AUDIOVIDEO_SINKS: (value 3940649673949188) (type GstElementFactoryListType)
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*
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* All sinks handling audio, video or image media types
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*/
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#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)
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/**
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* GST_ELEMENT_FACTORY_TYPE_DECODABLE: (value 353) (type GstElementFactoryListType)
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*
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* All elements used to 'decode' streams (decoders, demuxers, parsers, depayloaders)
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*/
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#define GST_ELEMENT_FACTORY_TYPE_DECODABLE \
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(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)
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/* Element klass defines */
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#define GST_ELEMENT_FACTORY_KLASS_DECODER "Decoder"
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#define GST_ELEMENT_FACTORY_KLASS_ENCODER "Encoder"
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#define GST_ELEMENT_FACTORY_KLASS_SINK "Sink"
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#define GST_ELEMENT_FACTORY_KLASS_SRC "Source"
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#define GST_ELEMENT_FACTORY_KLASS_MUXER "Muxer"
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#define GST_ELEMENT_FACTORY_KLASS_DEMUXER "Demuxer"
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#define GST_ELEMENT_FACTORY_KLASS_PARSER "Parser"
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#define GST_ELEMENT_FACTORY_KLASS_PAYLOADER "Payloader"
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#define GST_ELEMENT_FACTORY_KLASS_DEPAYLOADER "Depayloader"
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#define GST_ELEMENT_FACTORY_KLASS_FORMATTER "Formatter"
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#define GST_ELEMENT_FACTORY_KLASS_DECRYPTOR "Decryptor"
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#define GST_ELEMENT_FACTORY_KLASS_ENCRYPTOR "Encryptor"
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#define GST_ELEMENT_FACTORY_KLASS_MEDIA_VIDEO "Video"
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#define GST_ELEMENT_FACTORY_KLASS_MEDIA_AUDIO "Audio"
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#define GST_ELEMENT_FACTORY_KLASS_MEDIA_IMAGE "Image"
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#define GST_ELEMENT_FACTORY_KLASS_MEDIA_SUBTITLE "Subtitle"
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#define GST_ELEMENT_FACTORY_KLASS_MEDIA_METADATA "Metadata"
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gboolean gst_element_factory_list_is_type (GstElementFactory *factory,
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GstElementFactoryListType type);
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GList * gst_element_factory_list_get_elements (GstElementFactoryListType type,
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GstRank minrank) G_GNUC_MALLOC;
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GList * gst_element_factory_list_filter (GList *list, const GstCaps *caps,
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GstPadDirection direction,
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gboolean subsetonly) G_GNUC_MALLOC;
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#ifdef G_DEFINE_AUTOPTR_CLEANUP_FUNC
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G_DEFINE_AUTOPTR_CLEANUP_FUNC(GstElementFactory, gst_object_unref)
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#endif
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G_END_DECLS
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#endif /* __GST_ELEMENT_FACTORY_H__ */
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