2 * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
3 * 2000 Wim Taymans <wtay@chello.be>
5 * gstbin.h: Header for GstBin container object
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Library General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Library General Public License for more details.
17 * You should have received a copy of the GNU Library General Public
18 * License along with this library; if not, write to the
19 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 * Boston, MA 02111-1307, USA.
27 #include <gst/gstelement.h>
28 #include <gst/cothreads.h>
32 #endif /* __cplusplus */
34 extern GstElementDetails gst_bin_details;
35 extern GType _gst_bin_type;
37 #define GST_TYPE_BIN (_gst_bin_type)
38 # define GST_IS_BIN(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_BIN))
39 # define GST_IS_BIN_CLASS(obj) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_BIN))
41 #define GST_BIN_FAST(obj) ((GstBin*)(obj))
42 #define GST_BIN_CLASS_FAST(klass) ((GstBinClass*)(klass))
44 #ifdef GST_TYPE_PARANOID
45 # define GST_BIN(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_BIN, GstBin))
46 # define GST_BIN_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_BIN, GstBinClass))
48 # define GST_BIN GST_BIN_FAST
49 # define GST_BIN_CLASS GST_BIN_CLASS_FAST
53 /* this bin is a manager of child elements, i.e. a pipeline or thread */
54 GST_BIN_FLAG_MANAGER = GST_ELEMENT_FLAG_LAST,
55 /* this bin is actually a meta-bin, and may need to be scheduled */
56 GST_BIN_SELF_SCHEDULABLE,
58 /* we prefer to have cothreads when its an option, over chain-based */
59 GST_BIN_FLAG_PREFER_COTHREADS,
62 GST_BIN_FLAG_LAST = GST_ELEMENT_FLAG_LAST + 4,
65 //typedef struct _GstBin GstBin;
66 //typedef struct _GstBinClass GstBinClass;
74 gint num_eos_providers;
78 GstElementState child_states[GST_NUM_STATES];
80 cothread_context *threadcontext;
84 GstElementClass parent_class;
87 void (*object_added) (GstObject *object, GstObject *child);
88 void (*object_removed) (GstObject *object, GstObject *child);
90 /* change the state of elements of the given type */
91 gboolean (*change_state_type) (GstBin *bin,
92 GstElementState state,
94 /* run a full iteration of operation */
95 gboolean (*iterate) (GstBin *bin);
98 GType gst_bin_get_type (void);
99 GstElement* gst_bin_new (const gchar *name);
100 #define gst_bin_destroy(bin) gst_object_destroy(GST_OBJECT(bin))
102 /* add and remove elements from the bin */
103 void gst_bin_add (GstBin *bin, GstElement *element);
104 void gst_bin_remove (GstBin *bin, GstElement *element);
106 /* retrieve a single element or the list of children */
107 GstElement* gst_bin_get_by_name (GstBin *bin, const gchar *name);
108 GstElement* gst_bin_get_by_name_recurse_up (GstBin *bin, const gchar *name);
109 GList* gst_bin_get_list (GstBin *bin);
111 gboolean gst_bin_set_state_type (GstBin *bin, GstElementState state, GType type);
113 gboolean gst_bin_iterate (GstBin *bin);
117 #endif /* __cplusplus */
120 #endif /* __GST_BIN_H__ */