gstreamer/gst/gstbin.h
Steve Baker a415cdd34e remove the "iterate_started" signal and replace it with pre_iterate and post_iterate callbacks.
Original commit message from CVS:
remove the "iterate_started" signal and replace it with pre_iterate and post_iterate callbacks.

Apps can now put a lock around an iterate so they can do stuff on the bin from another thread. much nicer than the signal approach.
2002-06-10 16:48:47 +00:00

142 lines
4.6 KiB
C

/* 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>
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
extern GstElementDetails gst_bin_details;
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(obj) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_BIN))
#define GST_BIN_CAST(obj) ((GstBin*)(obj))
#define GST_BIN_CLASS_CAST(klass) ((GstBinClass*)(klass))
#ifdef GST_TYPE_PARANOID
# 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))
#else
# define GST_BIN GST_BIN_CAST
# define GST_BIN_CLASS GST_BIN_CLASS_CAST
#endif
typedef void (*GstBinPrePostIterateFunction) (GstBin *bin, gpointer 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;
GMutex *iterate_mutex;
GCond *iterate_cond;
GstElementState child_states[GST_NUM_STATES];
gpointer sched_private;
GstBinPrePostIterateFunction pre_iterate_func;
GstBinPrePostIterateFunction post_iterate_func;
gpointer pre_iterate_private;
gpointer post_iterate_private;
};
struct _GstBinClass {
GstElementClass parent_class;
/* signals */
void (*object_added) (GstObject *object, GstObject *child);
void (*object_removed) (GstObject *object, GstObject *child);
/* change the state of elements of the given type */
gboolean (*change_state_type) (GstBin *bin,
GstElementState state,
GType type);
/* run a full iteration of operation */
gboolean (*iterate) (GstBin *bin);
};
GType gst_bin_get_type (void);
GstElement* gst_bin_new (const gchar *name);
#define gst_bin_destroy(bin) gst_object_destroy(GST_OBJECT(bin))
/* 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);
/* 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);
const GList* gst_bin_get_list (GstBin *bin);
gboolean gst_bin_set_state_type (GstBin *bin, GstElementState state, GType type);
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);
/* 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 func_data);
void gst_bin_set_post_iterate_function (GstBin *bin, GstBinPrePostIterateFunction func, gpointer func_data);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __GST_BIN_H__ */