mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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64a6a1d2bd
Original commit message from CVS: - make child_state_change a virtual function - remove unneeded != NULL checks - implement gst_bin_sync_children_state
144 lines
4.6 KiB
C
144 lines
4.6 KiB
C
/* GStreamer
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* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
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* 2000 Wim Taymans <wtay@chello.be>
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*
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* gstbin.h: Header for GstBin container object
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifndef __GST_BIN_H__
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#define __GST_BIN_H__
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#include <gst/gstelement.h>
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G_BEGIN_DECLS
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extern GstElementDetails gst_bin_details;
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extern GType _gst_bin_type;
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#define GST_TYPE_BIN (_gst_bin_type)
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#define GST_IS_BIN(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_BIN))
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#define GST_IS_BIN_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_BIN))
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#define GST_BIN_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_BIN, GstBinClass))
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#define GST_BIN_CAST(obj) ((GstBin*)(obj))
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#define GST_BIN_CLASS_CAST(klass) ((GstBinClass*)(klass))
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#ifdef GST_TYPE_PARANOID
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# define GST_BIN(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_BIN, GstBin))
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# define GST_BIN_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_BIN, GstBinClass))
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#else
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# define GST_BIN GST_BIN_CAST
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# define GST_BIN_CLASS GST_BIN_CLASS_CAST
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#endif
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typedef void (*GstBinPrePostIterateFunction) (GstBin *bin, gpointer user_data);
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typedef enum {
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/* this bin is a manager of child elements, i.e. a pipeline or thread */
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GST_BIN_FLAG_MANAGER = GST_ELEMENT_FLAG_LAST,
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/* this bin iterates itself */
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GST_BIN_SELF_SCHEDULABLE,
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/* we prefer to have cothreads when its an option, over chain-based */
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GST_BIN_FLAG_PREFER_COTHREADS,
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GST_BIN_FLAG_FIXED_CLOCK,
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/* padding */
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GST_BIN_FLAG_LAST = GST_ELEMENT_FLAG_LAST + 5
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} GstBinFlags;
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/*typedef struct _GstBin GstBin; */
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/*typedef struct _GstBinClass GstBinClass; */
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struct _GstBin {
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GstElement element;
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/* our children */
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gint numchildren;
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GList *children;
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GstElementState child_states[GST_NUM_STATES];
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GstBinPrePostIterateFunction pre_iterate_func;
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GstBinPrePostIterateFunction post_iterate_func;
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gpointer pre_iterate_data;
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gpointer post_iterate_data;
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gpointer dummy[8];
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};
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struct _GstBinClass {
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GstElementClass parent_class;
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/* vtable */
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void (*add_element) (GstBin *bin, GstElement *element);
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void (*remove_element) (GstBin *bin, GstElement *element);
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void (*child_state_change) (GstBin *bin, GstElementState oldstate,
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GstElementState newstate, GstElement *element);
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/* run a full iteration of operation */
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gboolean (*iterate) (GstBin *bin);
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/* signals */
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void (*element_added) (GstBin *bin, GstElement *child);
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void (*element_removed) (GstBin *bin, GstElement *child);
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gpointer dummy[8];
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};
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GType gst_bin_get_type (void);
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GstElement* gst_bin_new (const gchar *name);
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/* add and remove elements from the bin */
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void gst_bin_add (GstBin *bin, GstElement *element);
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void gst_bin_add_many (GstBin *bin, GstElement *element_1, ...);
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void gst_bin_remove (GstBin *bin, GstElement *element);
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void gst_bin_remove_many (GstBin *bin, GstElement *element_1, ...);
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/* retrieve a single element or the list of children */
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GstElement* gst_bin_get_by_name (GstBin *bin, const gchar *name);
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GstElement* gst_bin_get_by_name_recurse_up (GstBin *bin, const gchar *name);
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const GList* gst_bin_get_list (GstBin *bin);
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gboolean gst_bin_iterate (GstBin *bin);
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void gst_bin_use_clock (GstBin *bin, GstClock *clock);
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GstClock* gst_bin_get_clock (GstBin *bin);
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void gst_bin_auto_clock (GstBin *bin);
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GstElementStateReturn gst_bin_sync_children_state (GstBin *bin);
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/* internal */
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/* one of our childs signaled a state change */
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void gst_bin_child_state_change (GstBin *bin, GstElementState oldstate,
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GstElementState newstate, GstElement *child);
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void gst_bin_set_pre_iterate_function (GstBin *bin,
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GstBinPrePostIterateFunction func,
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gpointer user_data);
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void gst_bin_set_post_iterate_function (GstBin *bin,
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GstBinPrePostIterateFunction func,
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gpointer user_data);
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G_END_DECLS
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#endif /* __GST_BIN_H__ */
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