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248 lines
7.6 KiB
C
248 lines
7.6 KiB
C
/* GStreamer
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* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
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* 2000 Wim Taymans <wim.taymans@chello.be>
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*
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* gstcache.h: Header for GstCache
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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., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifndef __GST_CACHE_H__
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#define __GST_CACHE_H__
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#include <gst/gstobject.h>
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#include <gst/gstformat.h>
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#include <gst/gstpluginfeature.h>
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G_BEGIN_DECLS
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#define GST_TYPE_CACHE (gst_cache_get_type ())
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#define GST_CACHE(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_CACHE, GstCache))
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#define GST_CACHE_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_CACHE, GstCacheClass))
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#define GST_IS_CACHE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_CACHE))
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#define GST_IS_CACHE_CLASS(obj) (GST_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_CACHE))
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typedef struct _GstCacheEntry GstCacheEntry;
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typedef struct _GstCacheGroup GstCacheGroup;
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typedef struct _GstCache GstCache;
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typedef struct _GstCacheClass GstCacheClass;
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typedef enum {
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GST_CACHE_UNKNOWN,
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GST_CACHE_CERTAIN,
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GST_CACHE_FUZZY
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} GstCacheCertainty;
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typedef enum {
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GST_CACHE_ENTRY_ID,
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GST_CACHE_ENTRY_ASSOCIATION,
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GST_CACHE_ENTRY_OBJECT,
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GST_CACHE_ENTRY_FORMAT,
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} GstCacheEntryType;
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typedef enum {
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GST_CACHE_LOOKUP_EXACT,
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GST_CACHE_LOOKUP_BEFORE,
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GST_CACHE_LOOKUP_AFTER,
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} GstCacheLookupMethod;
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#define GST_CACHE_NASSOCS(entry) ((entry)->data.assoc.nassocs)
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#define GST_CACHE_ASSOC_FLAGS(entry) ((entry)->data.assoc.flags)
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#define GST_CACHE_ASSOC_FORMAT(entry,i) ((entry)->data.assoc.assocs[(i)].format)
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#define GST_CACHE_ASSOC_VALUE(entry,i) ((entry)->data.assoc.assocs[(i)].value)
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typedef struct _GstCacheAssociation GstCacheAssociation;
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struct _GstCacheAssociation {
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GstFormat format;
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gint64 value;
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};
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typedef enum {
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GST_ACCOCIATION_FLAG_NONE = 0,
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GST_ACCOCIATION_FLAG_KEY_UNIT = (1 << 0),
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} GstAssocFlags;
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#define GST_CACHE_FORMAT_FORMAT(entry) ((entry)->data.format.format)
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#define GST_CACHE_FORMAT_KEY(entry) ((entry)->data.format.key)
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#define GST_CACHE_ID_DESCRIPTION(entry) ((entry)->data.id.description)
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struct _GstCacheEntry {
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GstCacheEntryType type;
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gint id;
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union {
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struct {
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gchar *description;
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} id;
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struct {
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gint nassocs;
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GstCacheAssociation
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*assocs;
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GstAssocFlags flags;
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} assoc;
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struct {
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gchar *key;
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GType type;
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gpointer object;
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} object;
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struct {
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GstFormat format;
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gchar *key;
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} format;
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} data;
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};
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struct _GstCacheGroup {
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/* unique ID of group in cache */
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gint groupnum;
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/* list of entries */
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GList *entries;
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/* the certainty level of the group */
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GstCacheCertainty certainty;
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/* peer group that contains more certain entries */
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gint peergroup;
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};
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typedef gboolean (*GstCacheFilter) (GstCache *cache,
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GstCacheEntry *entry);
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typedef gboolean (*GstCacheResolver) (GstCache *cache,
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GstObject *writer,
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gint *writer_id,
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gchar **writer_string,
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gpointer user_data);
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struct _GstCache {
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GstObject object;
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GList *groups;
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GstCacheGroup *curgroup;
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gint maxgroup;
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GstCacheResolver resolver;
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gpointer resolver_user_data;
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GstCacheFilter filter;
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gpointer filter_user_data;
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GHashTable *writers;
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gint last_id;
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};
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struct _GstCacheClass {
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GstObjectClass parent_class;
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gboolean (*resolve_writer) (GstCache *cache, GstObject *writer,
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gint *writer_id, gchar **writer_string);
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/* abstract methods */
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void (*add_entry) (GstCache *cache, GstCacheEntry *entry);
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GstCacheEntry* (*get_assoc_entry) (GstCache *cache, gint id,
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GstCacheLookupMethod method,
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GstFormat format, gint64 value,
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GCompareDataFunc func,
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gpointer user_data);
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/* signals */
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void (*entry_added) (GstCache *cache, GstCacheEntry *entry);
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};
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GType gst_cache_get_type (void);
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GstCache* gst_cache_new (void);
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gint gst_cache_get_group (GstCache *cache);
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gint gst_cache_new_group (GstCache *cache);
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gboolean gst_cache_set_group (GstCache *cache, gint groupnum);
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void gst_cache_set_certainty (GstCache *cache,
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GstCacheCertainty certainty);
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GstCacheCertainty gst_cache_get_certainty (GstCache *cache);
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void gst_cache_set_filter (GstCache *cache,
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GstCacheFilter filter, gpointer user_data);
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void gst_cache_set_resolver (GstCache *cache,
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GstCacheResolver resolver, gpointer user_data);
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gboolean gst_cache_get_writer_id (GstCache *cache, GstObject *writer, gint *id);
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GstCacheEntry* gst_cache_add_format (GstCache *cache, gint id, GstFormat format);
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GstCacheEntry* gst_cache_add_association (GstCache *cache, gint id, GstAssocFlags flags,
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GstFormat format, gint64 value, ...);
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GstCacheEntry* gst_cache_add_object (GstCache *cache, gint id, gchar *key,
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GType type, gpointer object);
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GstCacheEntry* gst_cache_add_id (GstCache *cache, gint id,
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gchar *description);
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GstCacheEntry* gst_cache_get_assoc_entry (GstCache *cache, gint id,
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GstCacheLookupMethod method,
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GstFormat format, gint64 value);
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GstCacheEntry* gst_cache_get_assoc_entry_full (GstCache *cache, gint id,
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GstCacheLookupMethod method,
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GstFormat format, gint64 value,
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GCompareDataFunc func,
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gpointer user_data);
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/* working with cache entries */
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void gst_cache_entry_free (GstCacheEntry *entry);
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gboolean gst_cache_entry_assoc_map (GstCacheEntry *entry,
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GstFormat format, gint64 *value);
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/*
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* creating caches
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*
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*/
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#define GST_TYPE_CACHE_FACTORY \
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(gst_cache_factory_get_type())
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#define GST_CACHE_FACTORY(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_CACHE_FACTORY,GstCacheFactory))
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#define GST_CACHE_FACTORY_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_CACHE_FACTORY,GstCacheFactoryClass))
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#define GST_IS_CACHE_FACTORY(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_CACHE_FACTORY))
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#define GST_IS_CACHE_FACTORY_CLASS(obj) \
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(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_CACHE_FACTORY))
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typedef struct _GstCacheFactory GstCacheFactory;
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typedef struct _GstCacheFactoryClass GstCacheFactoryClass;
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struct _GstCacheFactory {
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GstPluginFeature feature;
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gchar *longdesc; /* long description of the cache (well, don't overdo it..) */
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GType type; /* unique GType of the cache */
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};
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struct _GstCacheFactoryClass {
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GstPluginFeatureClass parent;
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};
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GType gst_cache_factory_get_type (void);
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GstCacheFactory* gst_cache_factory_new (const gchar *name,
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const gchar *longdesc, GType type);
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void gst_cache_factory_destroy (GstCacheFactory *factory);
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GstCacheFactory* gst_cache_factory_find (const gchar *name);
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GstCache* gst_cache_factory_create (GstCacheFactory *factory);
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GstCache* gst_cache_factory_make (const gchar *name);
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G_END_DECLS
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#endif /* __GST_CACHE_H__ */
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