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6ba0668cd8
Original commit message from CVS: Snapshot of work-in-progress do deal with out-of-bin elements. Current system is very likely going to be ditched due to its complexity and the fact that it doesn't work right now. More than that, it's generating some really odd results in my test program, which aren't readily explainable. If you want to keep a working copy of your working copy (heh), don't update until this is replaced with a hybrid approach. This approach will be the beginning of a plan generator that can construct full hybrid schedules given hints from various places. Hybrid means that cothreads are used, but there are chunks of the pipeline that are actually dealt with by chaining. This can improve speed by reducing cothread switches (which are much cheaper than thread switches, but still far from free, about 570 cycles on my PIII), but does carry a complexity burden. Luckily, the structure of GStreamer allows that burden to live entirely in create_plan. Luck? I think not ;-)
125 lines
3.3 KiB
C
125 lines
3.3 KiB
C
/* Gnome-Streamer
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* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
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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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#include <gst/gstsrc.h>
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#include <gst/gstconnection.h>
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#include <gst/cothreads.h>
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#ifdef __cplusplus
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extern "C" {
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#endif /* __cplusplus */
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extern GstElementDetails gst_bin_details;
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#define GST_TYPE_BIN \
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(gst_bin_get_type())
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#define GST_BIN(obj) \
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(GTK_CHECK_CAST((obj),GST_TYPE_BIN,GstBin))
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#define GST_BIN_CLASS(klass) \
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(GTK_CHECK_CLASS_CAST((klass),GST_TYPE_BIN,GstBinClass))
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#define GST_IS_BIN(obj) \
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(GTK_CHECK_TYPE((obj),GST_TYPE_BIN))
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#define GST_IS_BIN_CLASS(obj) \
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(GTK_CHECK_CLASS_TYPE((klass),GST_TYPE_BIN))
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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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// iteration state
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gboolean need_cothreads;
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GList *entries;
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gint numentries;
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cothread_context *threadcontext;
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gboolean use_cothreads;
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GList *outside_schedules;
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};
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struct _GstBinClass {
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GstElementClass parent_class;
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void (*object_added) (GstObject *object, GstObject *child);
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/* change the state of elements of the given type */
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gboolean (*change_state_type) (GstBin *bin,
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GstElementState state,
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GtkType type);
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/* create a plan for the execution of the bin */
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void (*create_plan) (GstBin *bin);
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/* run a full iteration of operation */
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void (*iterate) (GstBin *bin);
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};
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/* this struct is used for odd scheduling cases */
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typedef struct __GstBinOutsideSchedule {
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guint32 flags;
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GstElement *element;
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GstBin *bin;
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cothread_state *threadstate;
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GSList *padlist;
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} _GstBinOutsideSchedule;
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GtkType gst_bin_get_type (void);
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GstElement* gst_bin_new (gchar *name);
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#define gst_bin_destroy(bin) gst_object_destroy(GST_OBJECT(bin))
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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_remove (GstBin *bin, GstElement *element);
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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, gchar *name);
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GList* gst_bin_get_list (GstBin *bin);
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void gst_bin_create_plan (GstBin *bin);
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gboolean gst_bin_set_state_type (GstBin *bin,
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GstElementState state,
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GtkType type);
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void gst_bin_iterate (GstBin *bin);
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// hack FIXME
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void gst_bin_use_cothreads (GstBin *bin, gboolean enabled);
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#ifdef __cplusplus
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}
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#endif /* __cplusplus */
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#endif /* __GST_BIN_H__ */
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