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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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1debaf2b59
Original commit message from CVS: Added vmethod for when an element changes scheduling behaviour (like switching from chain based to loop based etc)
189 lines
7.5 KiB
C
189 lines
7.5 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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* gstscheduler.h: Header for default scheduler code
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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_SCHEDULER_H__
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#define __GST_SCHEDULER_H__
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#include <glib.h>
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#include <gst/gstelement.h>
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#include <gst/gstbin.h>
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G_BEGIN_DECLS
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#define GST_TYPE_SCHEDULER \
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(gst_scheduler_get_type())
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#define GST_SCHEDULER(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_SCHEDULER,GstScheduler))
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#define GST_SCHEDULER_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_SCHEDULER,GstSchedulerClass))
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#define GST_IS_SCHEDULER(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_SCHEDULER))
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#define GST_IS_SCHEDULER_CLASS(obj) \
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(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_SCHEDULER))
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typedef enum {
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/* this scheduler works with a fixed clock */
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GST_SCHEDULER_FLAG_FIXED_CLOCK = GST_OBJECT_FLAG_LAST,
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/* padding */
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GST_SCHEDULER_FLAG_LAST = GST_OBJECT_FLAG_LAST + 4
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} GstSchedulerFlags;
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#define GST_SCHEDULER_PARENT(sched) ((sched)->parent)
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#define GST_SCHEDULER_STATE(sched) ((sched)->state)
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/*typedef struct _GstScheduler GstScheduler; */
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/*typedef struct _GstSchedulerClass GstSchedulerClass; */
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typedef enum {
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GST_SCHEDULER_STATE_NONE,
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GST_SCHEDULER_STATE_RUNNING,
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GST_SCHEDULER_STATE_STOPPED,
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GST_SCHEDULER_STATE_ERROR
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} GstSchedulerState;
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struct _GstScheduler {
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GstObject object;
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GstElement *parent;
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GstScheduler *parent_sched;
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GstSchedulerState state;
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GstClock *clock;
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GstClock *current_clock;
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GList *clock_providers;
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GList *clock_receivers;
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GList *schedulers;
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};
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struct _GstSchedulerClass {
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GstObjectClass parent_class;
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/* virtual methods */
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void (*setup) (GstScheduler *sched);
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gboolean (*get_preferred_stack) (GstScheduler *sched, gpointer *stack, gulong *size);
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void (*reset) (GstScheduler *sched);
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void (*add_element) (GstScheduler *sched, GstElement *element);
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void (*remove_element) (GstScheduler *sched, GstElement *element);
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void (*add_scheduler) (GstScheduler *sched, GstScheduler *sched2);
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void (*remove_scheduler) (GstScheduler *sched, GstScheduler *sched2);
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GstElementStateReturn (*state_transition) (GstScheduler *sched, GstElement *element, gint transition);
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void (*scheduling_change) (GstScheduler *sched, GstElement *element);
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void (*lock_element) (GstScheduler *sched, GstElement *element);
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void (*unlock_element) (GstScheduler *sched, GstElement *element);
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void (*yield) (GstScheduler *sched, GstElement *element);
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gboolean (*interrupt) (GstScheduler *sched, GstElement *element);
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void (*error) (GstScheduler *sched, GstElement *element);
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void (*pad_connect) (GstScheduler *sched, GstPad *srcpad, GstPad *sinkpad);
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void (*pad_disconnect) (GstScheduler *sched, GstPad *srcpad, GstPad *sinkpad);
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void (*pad_select) (GstScheduler *sched, GList *padlist);
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GstClockReturn (*clock_wait) (GstScheduler *sched, GstElement *element,
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GstClock *clock, GstClockTime time, GstClockTimeDiff *jitter);
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GstSchedulerState (*iterate) (GstScheduler *sched);
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/* for debugging */
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void (*show) (GstScheduler *sched);
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/* signals go here */
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};
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GType gst_scheduler_get_type (void);
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#define gst_scheduler_destroy(sched) gst_object_destroy(GST_OBJECT(sched))
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void gst_scheduler_setup (GstScheduler *sched);
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gboolean gst_scheduler_get_preferred_stack(GstScheduler *sched, gpointer *stack, gulong *size);
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void gst_scheduler_reset (GstScheduler *sched);
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void gst_scheduler_add_element (GstScheduler *sched, GstElement *element);
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void gst_scheduler_remove_element (GstScheduler *sched, GstElement *element);
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void gst_scheduler_add_scheduler (GstScheduler *sched, GstScheduler *sched2);
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void gst_scheduler_remove_scheduler (GstScheduler *sched, GstScheduler *sched2);
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GstElementStateReturn gst_scheduler_state_transition (GstScheduler *sched, GstElement *element, gint transition);
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void gst_scheduler_scheduling_change (GstScheduler *sched, GstElement *element);
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void gst_scheduler_lock_element (GstScheduler *sched, GstElement *element);
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void gst_scheduler_unlock_element (GstScheduler *sched, GstElement *element);
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void gst_scheduler_yield (GstScheduler *sched, GstElement *element);
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gboolean gst_scheduler_interrupt (GstScheduler *sched, GstElement *element);
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void gst_scheduler_error (GstScheduler *sched, GstElement *element);
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void gst_scheduler_pad_connect (GstScheduler *sched, GstPad *srcpad, GstPad *sinkpad);
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void gst_scheduler_pad_disconnect (GstScheduler *sched, GstPad *srcpad, GstPad *sinkpad);
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GstPad* gst_scheduler_pad_select (GstScheduler *sched, GList *padlist);
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GstClockReturn gst_scheduler_clock_wait (GstScheduler *sched, GstElement *element,
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GstClock *clock, GstClockTime time, GstClockTimeDiff *jitter);
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gboolean gst_scheduler_iterate (GstScheduler *sched);
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void gst_scheduler_use_clock (GstScheduler *sched, GstClock *clock);
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void gst_scheduler_set_clock (GstScheduler *sched, GstClock *clock);
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GstClock* gst_scheduler_get_clock (GstScheduler *sched);
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void gst_scheduler_auto_clock (GstScheduler *sched);
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void gst_scheduler_show (GstScheduler *sched);
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/*
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* creating schedulers
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*
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*/
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#define GST_TYPE_SCHEDULER_FACTORY \
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(gst_scheduler_factory_get_type ())
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#define GST_SCHEDULER_FACTORY(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_SCHEDULER_FACTORY, GstSchedulerFactory))
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#define GST_SCHEDULER_FACTORY_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_SCHEDULER_FACTORY, GstSchedulerFactoryClass))
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#define GST_IS_SCHEDULER_FACTORY(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_SCHEDULER_FACTORY))
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#define GST_IS_SCHEDULER_FACTORY_CLASS(obj) \
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(G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_SCHEDULER_FACTORY))
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typedef struct _GstSchedulerFactory GstSchedulerFactory;
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typedef struct _GstSchedulerFactoryClass GstSchedulerFactoryClass;
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struct _GstSchedulerFactory {
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GstPluginFeature feature;
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gchar *longdesc; /* long description of the scheduler (well, don't overdo it..) */
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GType type; /* unique GType of the scheduler */
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};
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struct _GstSchedulerFactoryClass {
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GstPluginFeatureClass parent;
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};
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GType gst_scheduler_factory_get_type (void);
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GstSchedulerFactory* gst_scheduler_factory_new (const gchar *name, const gchar *longdesc, GType type);
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void gst_scheduler_factory_destroy (GstSchedulerFactory *factory);
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GstSchedulerFactory* gst_scheduler_factory_find (const gchar *name);
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GstScheduler* gst_scheduler_factory_create (GstSchedulerFactory *factory, GstElement *parent);
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GstScheduler* gst_scheduler_factory_make (const gchar *name, GstElement *parent);
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void gst_scheduler_factory_set_default_name (const gchar* name);
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const gchar* gst_scheduler_factory_get_default_name (void);
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G_END_DECLS
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#endif /* __GST_SCHEDULER_H__ */
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