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/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2000 Wim Taymans <wtay@chello.be>
*
* gstscheduler.h: Header for default scheduler code
*
* 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_SCHEDULER_H__
#define __GST_SCHEDULER_H__
#include <glib.h>
#include <gst/gstelement.h>
#include <gst/gstbin.h>
G_BEGIN_DECLS
#define GST_TYPE_SCHEDULER (gst_scheduler_get_type ())
#define GST_SCHEDULER(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_SCHEDULER, GstScheduler))
#define GST_IS_SCHEDULER(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_SCHEDULER))
#define GST_SCHEDULER_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_SCHEDULER,GstSchedulerClass))
#define GST_IS_SCHEDULER_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_SCHEDULER))
#define GST_SCHEDULER_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_SCHEDULER, GstSchedulerClass))
typedef enum {
/* this scheduler works with a fixed clock */
GST_SCHEDULER_FLAG_FIXED_CLOCK = GST_OBJECT_FLAG_LAST,
/* padding */
GST_SCHEDULER_FLAG_LAST = GST_OBJECT_FLAG_LAST + 4
} GstSchedulerFlags;
#define GST_SCHEDULER_PARENT(sched) ((sched)->parent)
#define GST_SCHEDULER_STATE(sched) ((sched)->state)
/*typedef struct _GstScheduler GstScheduler; */
/*typedef struct _GstSchedulerClass GstSchedulerClass; */
typedef enum {
GST_SCHEDULER_STATE_NONE,
GST_SCHEDULER_STATE_RUNNING,
GST_SCHEDULER_STATE_STOPPED,
GST_SCHEDULER_STATE_ERROR
} GstSchedulerState;
struct _GstScheduler {
GstObject object;
GstElement *parent;
GstScheduler *parent_sched;
GstSchedulerState state;
GstClock *clock;
GstClock *current_clock;
GList *clock_providers;
GList *clock_receivers;
GList *schedulers;
GST_OBJECT_PADDING
};
struct _GstSchedulerClass {
GstObjectClass parent_class;
/* virtual methods */
void (*setup) (GstScheduler *sched);
void (*reset) (GstScheduler *sched);
void (*add_element) (GstScheduler *sched, GstElement *element);
void (*remove_element) (GstScheduler *sched, GstElement *element);
void (*add_scheduler) (GstScheduler *sched, GstScheduler *sched2);
void (*remove_scheduler) (GstScheduler *sched, GstScheduler *sched2);
GstElementStateReturn (*state_transition) (GstScheduler *sched, GstElement *element, gint transition);
void (*scheduling_change) (GstScheduler *sched, GstElement *element);
void (*lock_element) (GstScheduler *sched, GstElement *element);
void (*unlock_element) (GstScheduler *sched, GstElement *element);
gboolean (*yield) (GstScheduler *sched, GstElement *element);
gboolean (*interrupt) (GstScheduler *sched, GstElement *element);
void (*error) (GstScheduler *sched, GstElement *element);
void (*pad_link) (GstScheduler *sched, GstPad *srcpad, GstPad *sinkpad);
void (*pad_unlink) (GstScheduler *sched, GstPad *srcpad, GstPad *sinkpad);
void (*pad_select) (GstScheduler *sched, GList *padlist);
GstClockReturn (*clock_wait) (GstScheduler *sched, GstElement *element,
GstClockID id, GstClockTimeDiff *jitter);
GstSchedulerState (*iterate) (GstScheduler *sched);
/* for debugging */
void (*show) (GstScheduler *sched);
/* signals */
void (*object_sync) (GstScheduler *sched, GstClock *clock, GstObject *object,
GstClockID id);
GST_CLASS_PADDING
};
GType gst_scheduler_get_type (void);
void gst_scheduler_setup (GstScheduler *sched);
void gst_scheduler_reset (GstScheduler *sched);
void gst_scheduler_add_element (GstScheduler *sched, GstElement *element);
void gst_scheduler_remove_element (GstScheduler *sched, GstElement *element);
void gst_scheduler_add_scheduler (GstScheduler *sched, GstScheduler *sched2);
void gst_scheduler_remove_scheduler (GstScheduler *sched, GstScheduler *sched2);
GstElementStateReturn gst_scheduler_state_transition (GstScheduler *sched, GstElement *element, gint transition);
void gst_scheduler_scheduling_change (GstScheduler *sched, GstElement *element);
void gst_scheduler_lock_element (GstScheduler *sched, GstElement *element);
void gst_scheduler_unlock_element (GstScheduler *sched, GstElement *element);
gboolean gst_scheduler_yield (GstScheduler *sched, GstElement *element);
gboolean gst_scheduler_interrupt (GstScheduler *sched, GstElement *element);
void gst_scheduler_error (GstScheduler *sched, GstElement *element);
void gst_scheduler_pad_link (GstScheduler *sched, GstPad *srcpad, GstPad *sinkpad);
void gst_scheduler_pad_unlink (GstScheduler *sched, GstPad *srcpad, GstPad *sinkpad);
GstPad* gst_scheduler_pad_select (GstScheduler *sched, GList *padlist);
GstClockReturn gst_scheduler_clock_wait (GstScheduler *sched, GstElement *element,
GstClockID id, GstClockTimeDiff *jitter);
gboolean gst_scheduler_iterate (GstScheduler *sched);
void gst_scheduler_use_clock (GstScheduler *sched, GstClock *clock);
void gst_scheduler_set_clock (GstScheduler *sched, GstClock *clock);
GstClock* gst_scheduler_get_clock (GstScheduler *sched);
void gst_scheduler_auto_clock (GstScheduler *sched);
void gst_scheduler_show (GstScheduler *sched);
/*
* creating schedulers
*
*/
#define GST_TYPE_SCHEDULER_FACTORY (gst_scheduler_factory_get_type ())
#define GST_SCHEDULER_FACTORY(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_SCHEDULER_FACTORY, GstSchedulerFactory))
#define GST_IS_SCHEDULER_FACTORY(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_SCHEDULER_FACTORY))
#define GST_SCHEDULER_FACTORY_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_SCHEDULER_FACTORY, GstSchedulerFactoryClass))
#define GST_IS_SCHEDULER_FACTORY_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_SCHEDULER_FACTORY))
#define GST_SCHEDULER_FACTORY_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_SCHEDULER_FACTORY, GstSchedulerFactoryClass))
/* change this to change the default scheduler */
#define GST_SCHEDULER_DEFAULT_NAME "opt"
typedef struct _GstSchedulerFactory GstSchedulerFactory;
typedef struct _GstSchedulerFactoryClass GstSchedulerFactoryClass;
struct _GstSchedulerFactory {
GstPluginFeature feature;
gchar *longdesc; /* long description of the scheduler (well, don't overdo it..) */
GType type; /* unique GType of the scheduler */
GST_OBJECT_PADDING
};
struct _GstSchedulerFactoryClass {
GstPluginFeatureClass parent;
GST_CLASS_PADDING
};
GType gst_scheduler_factory_get_type (void);
GstSchedulerFactory* gst_scheduler_factory_new (const gchar *name, const gchar *longdesc, GType type);
void gst_scheduler_factory_destroy (GstSchedulerFactory *factory);
GstSchedulerFactory* gst_scheduler_factory_find (const gchar *name);
GstScheduler* gst_scheduler_factory_create (GstSchedulerFactory *factory, GstElement *parent);
GstScheduler* gst_scheduler_factory_make (const gchar *name, GstElement *parent);
void gst_scheduler_factory_set_default_name (const gchar* name);
G_CONST_RETURN gchar* gst_scheduler_factory_get_default_name (void);
G_END_DECLS
#endif /* __GST_SCHEDULER_H__ */
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