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278 lines
8.7 KiB
C
278 lines
8.7 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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* gstindex.h: Header for GstIndex, base class to handle efficient
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* storage or caching of seeking information.
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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_INDEX_H__
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#define __GST_INDEX_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_INDEX (gst_index_get_type ())
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#define GST_INDEX(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_INDEX, GstIndex))
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#define GST_IS_INDEX(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_INDEX))
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#define GST_INDEX_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_INDEX, GstIndexClass))
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#define GST_IS_INDEX_CLASS(klass) (GST_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_INDEX))
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#define GST_INDEX_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_INDEX, GstIndexClass))
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typedef struct _GstIndexEntry GstIndexEntry;
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typedef struct _GstIndexGroup GstIndexGroup;
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typedef struct _GstIndex GstIndex;
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typedef struct _GstIndexClass GstIndexClass;
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typedef enum {
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GST_INDEX_UNKNOWN,
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GST_INDEX_CERTAIN,
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GST_INDEX_FUZZY
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} GstIndexCertainty;
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typedef enum {
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GST_INDEX_ENTRY_ID,
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GST_INDEX_ENTRY_ASSOCIATION,
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GST_INDEX_ENTRY_OBJECT,
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GST_INDEX_ENTRY_FORMAT
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} GstIndexEntryType;
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typedef enum {
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GST_INDEX_LOOKUP_EXACT,
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GST_INDEX_LOOKUP_BEFORE,
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GST_INDEX_LOOKUP_AFTER
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} GstIndexLookupMethod;
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#define GST_INDEX_NASSOCS(entry) ((entry)->data.assoc.nassocs)
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#define GST_INDEX_ASSOC_FLAGS(entry) ((entry)->data.assoc.flags)
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#define GST_INDEX_ASSOC_FORMAT(entry,i) ((entry)->data.assoc.assocs[(i)].format)
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#define GST_INDEX_ASSOC_VALUE(entry,i) ((entry)->data.assoc.assocs[(i)].value)
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typedef struct _GstIndexAssociation GstIndexAssociation;
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struct _GstIndexAssociation {
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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_ASSOCIATION_FLAG_NONE = 0,
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GST_ASSOCIATION_FLAG_KEY_UNIT = (1 << 0),
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/* new flags should start here */
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GST_ASSOCIATION_FLAG_LAST = (1 << 8)
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} GstAssocFlags;
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#define GST_INDEX_FORMAT_FORMAT(entry) ((entry)->data.format.format)
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#define GST_INDEX_FORMAT_KEY(entry) ((entry)->data.format.key)
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#define GST_INDEX_ID_INVALID (-1)
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#define GST_INDEX_ID_DESCRIPTION(entry) ((entry)->data.id.description)
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struct _GstIndexEntry {
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GstIndexEntryType 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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GstIndexAssociation
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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 _GstIndexGroup {
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/* unique ID of group in index */
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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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GstIndexCertainty 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 (*GstIndexFilter) (GstIndex *index,
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GstIndexEntry *entry);
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typedef enum {
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GST_INDEX_RESOLVER_CUSTOM,
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GST_INDEX_RESOLVER_GTYPE,
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GST_INDEX_RESOLVER_PATH
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} GstIndexResolverMethod;
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typedef gboolean (*GstIndexResolver) (GstIndex *index,
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GstObject *writer,
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gchar **writer_string,
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gpointer user_data);
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typedef enum {
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GST_INDEX_WRITABLE = GST_OBJECT_FLAG_LAST,
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GST_INDEX_READABLE,
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GST_INDEX_FLAG_LAST = GST_OBJECT_FLAG_LAST + 8
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} GstIndexFlags;
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#define GST_INDEX_IS_READABLE(obj) (GST_FLAG_IS_SET (obj, GST_INDEX_READABLE))
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#define GST_INDEX_IS_WRITABLE(obj) (GST_FLAG_IS_SET (obj, GST_INDEX_WRITABLE))
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struct _GstIndex {
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GstObject object;
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GList *groups;
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GstIndexGroup *curgroup;
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gint maxgroup;
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GstIndexResolverMethod method;
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GstIndexResolver resolver;
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gpointer resolver_user_data;
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GstIndexFilter 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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GST_OBJECT_PADDING
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};
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struct _GstIndexClass {
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GstObjectClass parent_class;
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gboolean (*get_writer_id) (GstIndex *index, gint *writer_id, gchar *writer_string);
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void (*commit) (GstIndex *index, gint id);
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/* abstract methods */
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void (*add_entry) (GstIndex *index, GstIndexEntry *entry);
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GstIndexEntry* (*get_assoc_entry) (GstIndex *index, gint id,
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GstIndexLookupMethod method, GstAssocFlags flags,
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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) (GstIndex *index, GstIndexEntry *entry);
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GST_CLASS_PADDING;
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};
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GType gst_index_get_type (void);
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GstIndex* gst_index_new (void);
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void gst_index_commit (GstIndex *index, gint id);
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gint gst_index_get_group (GstIndex *index);
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gint gst_index_new_group (GstIndex *index);
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gboolean gst_index_set_group (GstIndex *index, gint groupnum);
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void gst_index_set_certainty (GstIndex *index,
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GstIndexCertainty certainty);
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GstIndexCertainty gst_index_get_certainty (GstIndex *index);
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void gst_index_set_filter (GstIndex *index,
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GstIndexFilter filter, gpointer user_data);
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void gst_index_set_resolver (GstIndex *index,
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GstIndexResolver resolver, gpointer user_data);
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gboolean gst_index_get_writer_id (GstIndex *index, GstObject *writer, gint *id);
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GstIndexEntry* gst_index_add_format (GstIndex *index, gint id, GstFormat format);
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GstIndexEntry* gst_index_add_association (GstIndex *index, gint id, GstAssocFlags flags,
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GstFormat format, gint64 value, ...);
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GstIndexEntry* gst_index_add_object (GstIndex *index, gint id, gchar *key,
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GType type, gpointer object);
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GstIndexEntry* gst_index_add_id (GstIndex *index, gint id,
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gchar *description);
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GstIndexEntry* gst_index_get_assoc_entry (GstIndex *index, gint id,
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GstIndexLookupMethod method, GstAssocFlags flags,
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GstFormat format, gint64 value);
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GstIndexEntry* gst_index_get_assoc_entry_full (GstIndex *index, gint id,
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GstIndexLookupMethod method, GstAssocFlags flags,
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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 index entries */
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GstIndexEntry * gst_index_entry_copy (GstIndexEntry *entry);
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void gst_index_entry_free (GstIndexEntry *entry);
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gboolean gst_index_entry_assoc_map (GstIndexEntry *entry,
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GstFormat format, gint64 *value);
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/*
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* creating indexs
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*
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*/
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#define GST_TYPE_INDEX_FACTORY (gst_index_factory_get_type())
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#define GST_INDEX_FACTORY(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_INDEX_FACTORY, GstIndexFactory))
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#define GST_IS_INDEX_FACTORY(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_INDEX_FACTORY))
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#define GST_INDEX_FACTORY_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_INDEX_FACTORY, GstIndexFactoryClass))
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#define GST_IS_INDEX_FACTORY_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_INDEX_FACTORY))
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#define GST_INDEX_FACTORY_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_INDEX_FACTORY, GstIndexFactoryClass))
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typedef struct _GstIndexFactory GstIndexFactory;
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typedef struct _GstIndexFactoryClass GstIndexFactoryClass;
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struct _GstIndexFactory {
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GstPluginFeature feature;
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gchar *longdesc; /* long description of the index (well, don't overdo it..) */
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GType type; /* unique GType of the index */
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GST_OBJECT_PADDING
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};
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struct _GstIndexFactoryClass {
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GstPluginFeatureClass parent;
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GST_CLASS_PADDING
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};
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GType gst_index_factory_get_type (void);
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GstIndexFactory* gst_index_factory_new (const gchar *name,
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const gchar *longdesc, GType type);
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void gst_index_factory_destroy (GstIndexFactory *factory);
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GstIndexFactory* gst_index_factory_find (const gchar *name);
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GstIndex* gst_index_factory_create (GstIndexFactory *factory);
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GstIndex* gst_index_factory_make (const gchar *name);
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G_END_DECLS
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#endif /* __GST_INDEX_H__ */
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