gstreamer/gst/gstbin.h

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/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2000 Wim Taymans <wtay@chello.be>
*
* gstbin.h: Header for GstBin container 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_BIN_H__
#define __GST_BIN_H__
#include <gst/gstelement.h>
G_BEGIN_DECLS extern GType _gst_bin_type;
#define GST_TYPE_BIN (_gst_bin_type)
#define GST_IS_BIN(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_BIN))
#define GST_IS_BIN_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_BIN))
#define GST_BIN_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_BIN, GstBinClass))
#define GST_BIN(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_BIN, GstBin))
#define GST_BIN_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_BIN, GstBinClass))
typedef void (*GstBinPrePostIterateFunction) (GstBin * bin, gpointer user_data);
typedef enum
{
/* this bin is a manager of child elements, i.e. a pipeline or thread */
GST_BIN_FLAG_MANAGER = GST_ELEMENT_FLAG_LAST,
/* this bin iterates itself */
GST_BIN_SELF_SCHEDULABLE,
/* we prefer to have cothreads when its an option, over chain-based */
GST_BIN_FLAG_PREFER_COTHREADS,
GST_BIN_FLAG_FIXED_CLOCK,
/* padding */
GST_BIN_FLAG_LAST = GST_ELEMENT_FLAG_LAST + 5
} GstBinFlags;
/*typedef struct _GstBin GstBin; */
/*typedef struct _GstBinClass GstBinClass; */
struct _GstBin
{
GstElement element;
/* our children */
gint numchildren;
GList *children;
- some fixes to int2float making automake 1.5 happy (gst now requires automake1.5). It's still not perfect but it bui... Original commit message from CVS: - added playondemand plugin by Leif Morgan Johnson <lmjohns3@eos.ncsu.edu> - some fixes to int2float - aplied a patch from wrobell <wrobell@ite.pl> that is a first attempt at making automake 1.5 happy (gst now requires automake1.5). It's still not perfect but it builds. - Made the schedulers plugable. The default scheduler now lives inside a plugin. - Added a new mpeg1/2 parser/demuxer. - Fixed some compiler warnings in the core libs. - substantial work to GstThread (hopefully less race conditions). simplified the code in GstThread a bit. A state change can now also happen in the thread context. - reworked the state semantics of a bin. it'll now automatically get the highest state of its children. - the autoplugger now nests the threads so that a state change failure of one thread doesn't make its upstream thread lock. - GstQueue refuses to go to PLAYING if the sinkpad is not connected. This way the queue will not wedge in the _get lock. - GstQueue unlocks its mutexes when going to PAUSED. - make sure that when all elements in a bin/thread go to PAUSED, the bin is set to PAUSED too. - make a parent bin wait for its children to PAUSE before ending the iteration with FALSE (EOS) - Some changes to GstPlay to deal with EOS. - aplied the latest patch from Zeenix to gstrtp. end result: GstPlay doesn't crash on EOS and the pipeline is now shut down properly.
2001-12-04 22:12:50 +00:00
GstElementState child_states[GST_NUM_STATES];
gpointer _gst_reserved[GST_PADDING];
};
struct _GstBinClass
{
GstElementClass parent_class;
/* vtable */
void (*add_element) (GstBin * bin, GstElement * element);
void (*remove_element) (GstBin * bin, GstElement * element);
void (*child_state_change) (GstBin * bin, GstElementState oldstate,
GstElementState newstate, GstElement * element);
/* run a full iteration of operation */
gboolean (*iterate) (GstBin * bin);
/* signals */
void (*element_added) (GstBin * bin, GstElement * child);
void (*element_removed) (GstBin * bin, GstElement * child);
gpointer _gst_reserved[GST_PADDING];
};
GType gst_bin_get_type (void);
GstElement *gst_bin_new (const gchar * name);
/* add and remove elements from the bin */
void gst_bin_add (GstBin * bin, GstElement * element);
void gst_bin_add_many (GstBin * bin, GstElement * element_1, ...);
void gst_bin_remove (GstBin * bin, GstElement * element);
void gst_bin_remove_many (GstBin * bin, GstElement * element_1, ...);
/* retrieve a single element or the list of children */
GstElement *gst_bin_get_by_name (GstBin * bin, const gchar * name);
GstElement *gst_bin_get_by_name_recurse_up (GstBin * bin, const gchar * name);
G_CONST_RETURN GList *gst_bin_get_list (GstBin * bin);
GstElement *gst_bin_get_by_interface (GstBin * bin, GType interface);
GList *gst_bin_get_all_by_interface (GstBin * bin, GType interface);
gboolean gst_bin_iterate (GstBin * bin);
void gst_bin_use_clock (GstBin * bin, GstClock * clock);
GstClock *gst_bin_get_clock (GstBin * bin);
void gst_bin_auto_clock (GstBin * bin);
GstElementStateReturn gst_bin_sync_children_state (GstBin * bin);
/* internal */
/* one of our childs signaled a state change */
void gst_bin_child_state_change (GstBin * bin, GstElementState oldstate,
GstElementState newstate, GstElement * child);
void gst_bin_set_pre_iterate_function (GstBin * bin,
GstBinPrePostIterateFunction func, gpointer user_data);
void gst_bin_set_post_iterate_function (GstBin * bin,
GstBinPrePostIterateFunction func, gpointer user_data);
G_END_DECLS
#endif /* __GST_BIN_H__ */