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 GST_EXPORT 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))
42 * @GST_BIN_FLAG_MANAGER: this bin is a manager of child elements, i.e.
43 * a pipeline or thread.
44 * @GST_BIN_SELF_SCHEDULABLE: the bin iterates itself.
45 * @GST_BIN_FLAG_PREFER_COTHREADS: we prefer to have cothreads when its
46 * an option, over chain-based.
47 * @GST_BIN_FLAG_FIXED_CLOCK: bin has one clock that cannot be changed.
48 * @GST_BIN_STATE_LOCKED: indicator that we are in a non-recursive
49 * state-change on the bin, or that kids should not change parent state.
50 * Both are internally used to prevent infinitely recursive loops of
51 * state changes. Since they are mutually exclusive and serve the same
52 * purpose, we use the same flag for them.
53 * @GST_BIN_FLAG_LAST: the last enum in the series of flags in a bin,
54 * derived classes can use this as first value in a list of flags.
56 * GstBinFlags are a set of flags specific to bins. Most are set/used
57 * internally. They can be checked using the GST_FLAG_IS_SET () macro,
58 * and (un)set using GST_FLAG_SET () and GST_FLAG_UNSET ().
61 GST_BIN_FLAG_MANAGER = GST_ELEMENT_FLAG_LAST,
62 GST_BIN_SELF_SCHEDULABLE,
63 GST_BIN_FLAG_PREFER_COTHREADS,
64 GST_BIN_FLAG_FIXED_CLOCK,
66 GST_BIN_FLAG_LAST = GST_ELEMENT_FLAG_LAST + 5
69 /*typedef struct _GstBin GstBin; */
70 /*typedef struct _GstBinClass GstBinClass; */
79 GstElementState child_states[GST_NUM_STATES];
81 gpointer _gst_reserved[GST_PADDING];
85 GstElementClass parent_class;
88 void (*add_element) (GstBin *bin, GstElement *element);
89 void (*remove_element) (GstBin *bin, GstElement *element);
90 void (*child_state_change) (GstBin *bin, GstElementState oldstate,
91 GstElementState newstate, GstElement *element);
93 /* run a full iteration of operation */
94 gboolean (*iterate) (GstBin *bin);
97 void (*element_added) (GstBin *bin, GstElement *child);
98 void (*element_removed) (GstBin *bin, GstElement *child);
100 gpointer _gst_reserved[GST_PADDING];
103 GType gst_bin_get_type (void);
104 GstElement* gst_bin_new (const gchar *name);
106 /* add and remove elements from the bin */
107 void gst_bin_add (GstBin *bin, GstElement *element);
108 void gst_bin_add_many (GstBin *bin, GstElement *element_1, ...);
109 void gst_bin_remove (GstBin *bin, GstElement *element);
110 void gst_bin_remove_many (GstBin *bin, GstElement *element_1, ...);
112 /* retrieve a single element or the list of children */
113 GstElement* gst_bin_get_by_name (GstBin *bin, const gchar *name);
114 GstElement* gst_bin_get_by_name_recurse_up (GstBin *bin, const gchar *name);
115 G_CONST_RETURN GList*
116 gst_bin_get_list (GstBin *bin);
117 GstElement* gst_bin_get_by_interface (GstBin *bin, GType interface);
118 GList * gst_bin_get_all_by_interface (GstBin *bin, GType interface);
120 gboolean gst_bin_iterate (GstBin *bin);
122 void gst_bin_use_clock (GstBin *bin, GstClock *clock);
123 GstClock* gst_bin_get_clock (GstBin *bin);
124 void gst_bin_auto_clock (GstBin *bin);
126 GstElementStateReturn gst_bin_sync_children_state (GstBin *bin);
129 /* one of our childs signaled a state change */
130 void gst_bin_child_state_change (GstBin *bin, GstElementState oldstate,
131 GstElementState newstate, GstElement *child);
136 #endif /* __GST_BIN_H__ */