mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-15 22:01:27 +00:00
98 lines
3.2 KiB
C
98 lines
3.2 KiB
C
/* GStreamer
|
|
* Copyright (C) 2002 Erik Walthinsen <omega@cse.ogi.edu>
|
|
* 2002 Wim Taymans <wtay@chello.be>
|
|
*
|
|
* gstspider.h: Header for GstSpider object
|
|
*
|
|
* 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_SPIDER_H__
|
|
#define __GST_SPIDER_H__
|
|
|
|
#include <gst/gst.h>
|
|
#include "gstspideridentity.h"
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif /* __cplusplus */
|
|
|
|
extern GstElementDetails gst_spider_details;
|
|
|
|
/*
|
|
* Theory of operation:
|
|
* When connecting a sink to a source, GstSpiderConnections are used to keep track
|
|
* of the current status of the connection. sink -> src is the path we intend to
|
|
* plug. current is how far we've come. If current equals
|
|
* - NULL, there is no possible path,
|
|
* - src, the connection is established.
|
|
* - sink, it wasn't tried to establish a connection.
|
|
* - something else, we have come that far while plugging.
|
|
* signal_id is used to remember the signal_id when we are waiting for a "new_pad"
|
|
* callback during connection.
|
|
* When a path is established, the elements in the path (excluding sink and src)
|
|
* are refcounted once for every path.
|
|
* A GstSpider keeps a list of all GstSpiderConnections in it.
|
|
*/
|
|
typedef struct {
|
|
GstSpiderIdentity *sink;
|
|
GstSpiderIdentity *src;
|
|
/* dunno if the path should stay here or if its too much load.
|
|
* it's at least easier then always searching it */
|
|
GList *path;
|
|
GstElement *current;
|
|
gulong signal_id;
|
|
} GstSpiderConnection;
|
|
|
|
#define GST_TYPE_SPIDER \
|
|
(gst_spider_get_type())
|
|
#define GST_SPIDER(obj) \
|
|
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_SPIDER,GstSpider))
|
|
#define GST_SPIDER_CLASS(klass) \
|
|
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_SPIDER,GstSpiderClass))
|
|
#define GST_IS_SPIDER(obj) \
|
|
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_SPIDER))
|
|
#define GST_IS_SPIDER_CLASS(obj) \
|
|
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_SPIDER))
|
|
|
|
typedef struct _GstSpider GstSpider;
|
|
typedef struct _GstSpiderClass GstSpiderClass;
|
|
|
|
struct _GstSpider {
|
|
GstBin parent;
|
|
|
|
GList * factories; /* factories to use for plugging */
|
|
|
|
GList * connections; /* GStSpiderConnection list of all connections */
|
|
};
|
|
|
|
struct _GstSpiderClass {
|
|
GstBinClass parent_class;
|
|
};
|
|
|
|
/* default initialization stuff */
|
|
GType gst_spider_get_type (void);
|
|
|
|
/* private connection functions to be called by GstSpiderIdentity */
|
|
void gst_spider_identity_plug (GstSpiderIdentity *ident);
|
|
void gst_spider_identity_unplug (GstSpiderIdentity *ident);
|
|
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif /* __cplusplus */
|
|
|
|
#endif /* __GST_SPIDER_H__ */
|