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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
191 lines
4.8 KiB
C
191 lines
4.8 KiB
C
/* GStreamer
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* Copyright (C) 2006 Josep Torra <josep@fluendo.com>
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* Copyright (C) 2006 Mathieu Garcia <matthieu@fluendo.com>
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* Copyright (C) 2006 Stefan Kost <ensonic@sonicpulse.de>
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*
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* gstregistrybinary.h: Header for registry handling
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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_REGISTRYCHUNKS_H__
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#define __GST_REGISTRYCHUNKS_H__
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#include <gst/gstpad.h>
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#include <gst/gstregistry.h>
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/*
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* we reference strings directly from the plugins and in this case set CONST to
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* avoid freeing them. If g_free() should be used, the MALLOC flag is set,
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* otherwise g_slice_free1() will be used!
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*/
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enum {
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GST_REGISTRY_CHUNK_FLAG_NONE = 0,
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GST_REGISTRY_CHUNK_FLAG_CONST = 1,
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GST_REGISTRY_CHUNK_FLAG_MALLOC = 2,
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};
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/*
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* GstRegistryChunk:
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*
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* Header for binary blobs
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*/
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typedef struct _GstRegistryChunk
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{
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gpointer data;
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guint size;
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guint flags;
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gboolean align;
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} GstRegistryChunk;
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typedef struct _GstRegistryChunkGlobalHeader
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{
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guint32 filter_env_hash;
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} GstRegistryChunkGlobalHeader;
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/*
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* GstRegistryChunkPluginElement:
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*
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* @n_deps: Says how many dependency structures follows.
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*
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* @nfeatures: says how many binary plugin feature structures we will have
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* right after the structure itself.
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*
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* A structure containing (staticely) every information needed for a plugin
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*/
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typedef struct _GstRegistryChunkPluginElement
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{
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gulong file_size;
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gulong file_mtime;
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guint n_deps;
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guint nfeatures;
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} GstRegistryChunkPluginElement;
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/* GstRegistryChunkDep:
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*/
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typedef struct _GstRegistryChunkDep
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{
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guint flags;
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guint n_env_vars;
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guint n_paths;
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guint n_names;
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guint env_hash;
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guint stat_hash;
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} GstRegistryChunkDep;
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/*
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* GstRegistryChunkPluginFeature:
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* @rank: rank of the feature
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*
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* A structure containing the plugin features
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*/
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typedef struct _GstRegistryChunkPluginFeature
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{
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gulong rank;
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} GstRegistryChunkPluginFeature;
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/*
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* GstRegistryChunkElementFactory:
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* @npadtemplates: stores the number of GstRegistryChunkPadTemplate structures
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* following the structure
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* @ninterfaces: stores the number of interface names following the structure
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* @nuriprotocols: stores the number of protocol strings following the structure
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*
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* A structure containing the element factory fields
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*/
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typedef struct _GstRegistryChunkElementFactory
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{
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GstRegistryChunkPluginFeature plugin_feature;
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guint npadtemplates;
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guint ninterfaces;
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guint nuriprotocols;
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} GstRegistryChunkElementFactory;
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/*
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* GstRegistryChunkTypeFindFactory:
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* @nextensions: stores the number of typefind extensions
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*
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* A structure containing the type find factory fields
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*/
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typedef struct _GstRegistryChunkTypeFindFactory
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{
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GstRegistryChunkPluginFeature plugin_feature;
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guint nextensions;
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} GstRegistryChunkTypeFindFactory;
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/*
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* GstRegistryChunkDeviceProviderFactory:
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*
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* A structure containing the device provider factory fields
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*/
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typedef struct _GstRegistryChunkDeviceProviderFactory
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{
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GstRegistryChunkPluginFeature plugin_feature;
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} GstRegistryChunkDeviceProviderFactory;
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/*
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* GstRegistryChunkDynamicTypeFactory:
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*
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* A structure containing the dynamic type factory flags field
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*/
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typedef struct _GstRegistryChunkDynamicTypeFactory
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{
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GstRegistryChunkPluginFeature plugin_feature;
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guint type_flags;
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} GstRegistryChunkDynamicTypeFactory;
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/*
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* GstRegistryChunkPadTemplate:
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*
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* A structure containing the static pad templates of a plugin feature
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*/
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typedef struct _GstRegistryChunkPadTemplate
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{
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guint direction; /* Either 0:"sink" or 1:"src" */
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GstPadPresence presence;
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} GstRegistryChunkPadTemplate;
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G_BEGIN_DECLS
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gboolean
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_priv_gst_registry_chunks_save_plugin (GList ** list, GstRegistry * registry,
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GstPlugin * plugin);
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gboolean
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_priv_gst_registry_chunks_load_plugin (GstRegistry * registry, gchar ** in,
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gchar *end, GstPlugin **out_plugin);
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void
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_priv_gst_registry_chunks_save_global_header (GList ** list,
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GstRegistry * registry, guint32 filter_env_hash);
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gboolean
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_priv_gst_registry_chunks_load_global_header (GstRegistry * registry,
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gchar ** in, gchar *end, guint32 * filter_env_hash);
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void
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_priv_gst_registry_chunk_free (GstRegistryChunk *chunk);
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G_END_DECLS
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#endif /* __GST_REGISTRYCHUNKS_H__ */
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