gstreamer/gst/gsttimecache.h

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/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2000 Wim Taymans <wim.taymans@chello.be>
*
* gsttimecache.h: Header for GstTimeCache
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __GST_TIME_CACHE_H__
#define __GST_TIME_CACHE_H__
#include <gst/gstobject.h>
G_BEGIN_DECLS
#define GST_TYPE_TIME_CACHE (gst_time_cache_get_type ())
#define GST_TIME_CACHE(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_TIME_CACHE, GstTimeCache))
#define GST_TIME_CACHE_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_TIME_CACHE, GstTimeCacheClass))
#define GST_IS_TIME_CACHE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_TIME_CACHE))
#define GST_IS_TIME_CACHE_CLASS(obj) (GST_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_TIME_CACHE))
typedef struct _GstTimeCacheEntry GstTimeCacheEntry;
typedef struct _GstTimeCacheGroup GstTimeCacheGroup;
typedef struct _GstTimeCache GstTimeCache;
typedef struct _GstTimeCacheClass GstTimeCacheClass;
typedef enum {
GST_TIME_CACHE_UNKNOWN,
GST_TIME_CACHE_CERTAIN,
GST_TIME_CACHE_FUZZY_LOCATION,
GST_TIME_CACHE_FUZZY_TIMESTAMP,
GST_TIME_CACHE_FUZZY
} GstTimeCacheCertainty;
struct _GstTimeCacheEntry {
guint64 location;
gint64 timestamp;
};
struct _GstTimeCacheGroup {
/* unique ID of group in cache */
gint groupnum;
/* list of entries */
GList *entries;
/* the certainty level of the group */
GstTimeCacheCertainty certainty;
/* peer group that contains more certain entries */
gint peergroup;
/* range variables */
gint64 mintimestamp,maxtimestamp;
guint64 minlocation,maxlocation;
};
struct _GstTimeCacheClass {
GstObjectClass parent_class;
};
struct _GstTimeCache {
GstObject object;
GList *groups;
GstTimeCacheGroup *curgroup;
gint maxgroup;
};
GType gst_time_cache_get_type (void);
GstTimeCache* gst_time_cache_new (void);
gint gst_time_cache_get_group (GstTimeCache *tc);
gint gst_time_cache_new_group (GstTimeCache *tc);
gboolean gst_time_cache_set_group (GstTimeCache *tc, gint groupnum);
void gst_time_cache_set_certainty (GstTimeCache *tc, GstTimeCacheCertainty certainty);
GstTimeCacheCertainty gst_time_cache_get_certainty (GstTimeCache *tc);
void gst_time_cache_add_entry (GstTimeCache *tc, guint64 location, gint64 timestamp);
gboolean gst_time_cache_find_location (GstTimeCache *tc, guint64 location, gint64 *timestamp);
gboolean gst_time_cache_find_timestamp (GstTimeCache *tc, gint64 timestamp, guint64 *location);
G_END_DECLS
#endif /* __GST_TIME_CACHE_H__ */