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>
31 extern GType _gst_bin_type;
33 #define GST_TYPE_BIN (_gst_bin_type)
34 #define GST_IS_BIN(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_BIN))
35 #define GST_IS_BIN_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_BIN))
36 #define GST_BIN_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_BIN, GstBinClass))
37 #define GST_BIN(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_BIN, GstBin))
38 #define GST_BIN_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_BIN, GstBinClass))
40 typedef void (*GstBinPrePostIterateFunction) (GstBin *bin, gpointer user_data);
43 /* this bin is a manager of child elements, i.e. a pipeline or thread */
44 GST_BIN_FLAG_MANAGER = GST_ELEMENT_FLAG_LAST,
46 /* this bin iterates itself */
47 GST_BIN_SELF_SCHEDULABLE,
49 /* we prefer to have cothreads when its an option, over chain-based */
50 GST_BIN_FLAG_PREFER_COTHREADS,
52 GST_BIN_FLAG_FIXED_CLOCK,
55 GST_BIN_FLAG_LAST = GST_ELEMENT_FLAG_LAST + 5
58 /*typedef struct _GstBin GstBin; */
59 /*typedef struct _GstBinClass GstBinClass; */
68 GstElementState child_states[GST_NUM_STATES];
70 gpointer _gst_reserved[GST_PADDING];
74 GstElementClass parent_class;
77 void (*add_element) (GstBin *bin, GstElement *element);
78 void (*remove_element) (GstBin *bin, GstElement *element);
79 void (*child_state_change) (GstBin *bin, GstElementState oldstate,
80 GstElementState newstate, GstElement *element);
82 /* run a full iteration of operation */
83 gboolean (*iterate) (GstBin *bin);
86 void (*element_added) (GstBin *bin, GstElement *child);
87 void (*element_removed) (GstBin *bin, GstElement *child);
89 gpointer _gst_reserved[GST_PADDING];
92 GType gst_bin_get_type (void);
93 GstElement* gst_bin_new (const gchar *name);
95 /* add and remove elements from the bin */
96 void gst_bin_add (GstBin *bin, GstElement *element);
97 void gst_bin_add_many (GstBin *bin, GstElement *element_1, ...);
98 void gst_bin_remove (GstBin *bin, GstElement *element);
99 void gst_bin_remove_many (GstBin *bin, GstElement *element_1, ...);
101 /* retrieve a single element or the list of children */
102 GstElement* gst_bin_get_by_name (GstBin *bin, const gchar *name);
103 GstElement* gst_bin_get_by_name_recurse_up (GstBin *bin, const gchar *name);
104 G_CONST_RETURN GList*
105 gst_bin_get_list (GstBin *bin);
106 GstElement* gst_bin_get_by_interface (GstBin *bin, GType interface);
107 GList * gst_bin_get_all_by_interface (GstBin *bin, GType interface);
109 gboolean gst_bin_iterate (GstBin *bin);
111 void gst_bin_use_clock (GstBin *bin, GstClock *clock);
112 GstClock* gst_bin_get_clock (GstBin *bin);
113 void gst_bin_auto_clock (GstBin *bin);
115 GstElementStateReturn gst_bin_sync_children_state (GstBin *bin);
118 /* one of our childs signaled a state change */
119 void gst_bin_child_state_change (GstBin *bin, GstElementState oldstate,
120 GstElementState newstate, GstElement *child);
122 void gst_bin_set_pre_iterate_function (GstBin *bin,
123 GstBinPrePostIterateFunction func,
125 void gst_bin_set_post_iterate_function (GstBin *bin,
126 GstBinPrePostIterateFunction func,
132 #endif /* __GST_BIN_H__ */