gst/schedulers/threadscheduler.c - imx-gstreamer - Git at Google

 /* GStreamer2
  * Copyright (C) 2004 Wim Taymans <wim@fluendo.com>
  *
  * threadscheduler.c: scheduler using threads
  *
  * 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.
  */

 #ifdef HAVE_CONFIG_H
 #  include "config.h"
 #endif

 #include <gst/gst.h>
 #include "../gst-i18n-lib.h"

 GST_DEBUG_CATEGORY_STATIC (debug_scheduler);
 #define GST_CAT_DEFAULT debug_scheduler

 #define GST_TYPE_THREAD_SCHEDULER \
   (gst_thread_scheduler_get_type ())
 #define GST_THREAD_SCHEDULER(obj) \
   (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_THREAD_SCHEDULER,GstThreadScheduler))
 #define GST_THREAD_SCHEDULER_CLASS(klass) \
   (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_THREAD_SCHEDULER,GstThreadSchedulerClass))
 #define GST_IS_THREAD_SCHEDULER(obj) \
   (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_THREAD_SCHEDULER))
 #define GST_IS_THREAD_SCHEDULER_CLASS(obj) \
   (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_THREAD_SCHEDULER))

 #define SCHED(element) (GST_THREAD_SCHEDULER ((element)->sched))

 GType gst_thread_scheduler_get_type (void);

 typedef struct _GstThreadScheduler GstThreadScheduler;
 typedef struct _GstThreadSchedulerClass GstThreadSchedulerClass;

 struct _GstThreadScheduler
 {
   GstScheduler scheduler;

   GThreadPool *pool;
 };

 struct _GstThreadSchedulerClass
 {
   GstSchedulerClass scheduler_class;
 };

 #define ELEMENT_PRIVATE(element) GST_ELEMENT (element)->sched_private
 #define PAD_PRIVATE(pad) (GST_REAL_PAD (pad))->sched_private

 #define GST_TYPE_THREAD_SCHEDULER_TASK \
   (gst_thread_scheduler_task_get_type ())
 #define GST_THREAD_SCHEDULER_TASK(obj) \
   (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_THREAD_SCHEDULER_TASK,GstThreadSchedulerTask))
 #define GST_THREAD_SCHEDULER_TASK_CLASS(klass) \
   (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_THREAD_SCHEDULER_TASK,GstThreadSchedulerTaskClass))
 #define GST_IS_THREAD_SCHEDULER_TASK(obj) \
   (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_THREAD_SCHEDULER_TASK))
 #define GST_IS_THREAD_SCHEDULER_TASK_CLASS(obj) \
   (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_THREAD_SCHEDULER_TASK))

 typedef struct _GstThreadSchedulerTask GstThreadSchedulerTask;
 typedef struct _GstThreadSchedulerTaskClass GstThreadSchedulerTaskClass;

 struct _GstThreadSchedulerTask
 {
   GstTask task;
 };

 struct _GstThreadSchedulerTaskClass
 {
   GstTaskClass parent_class;
 };

 static void gst_thread_scheduler_task_class_init (gpointer g_class,
     gpointer data);
 static void gst_thread_scheduler_task_init (GstThreadSchedulerTask * object);

 static gboolean gst_thread_scheduler_task_start (GstTask * task);
 static gboolean gst_thread_scheduler_task_stop (GstTask * task);
 static gboolean gst_thread_scheduler_task_pause (GstTask * task);

 GType
 gst_thread_scheduler_task_get_type (void)
 {
   static GType object_type = 0;

   if (object_type == 0) {
     static const GTypeInfo object_info = {
       sizeof (GstThreadSchedulerTaskClass),
       NULL,
       NULL,
       gst_thread_scheduler_task_class_init,
       NULL,
       NULL,
       sizeof (GstThreadSchedulerTask),
       0,
       (GInstanceInitFunc) gst_thread_scheduler_task_init
     };

     object_type =
         g_type_register_static (GST_TYPE_TASK,
         "GstThreadSchedulerTask", &object_info, 0);
   }
   return object_type;
 }

 static void
 gst_thread_scheduler_task_class_init (gpointer klass, gpointer class_data)
 {
   GstTaskClass *task = GST_TASK_CLASS (klass);

   task->start = gst_thread_scheduler_task_start;
   task->stop = gst_thread_scheduler_task_stop;
   task->pause = gst_thread_scheduler_task_pause;
 }

 static void
 gst_thread_scheduler_task_init (GstThreadSchedulerTask * task)
 {
   GST_TASK (task)->state = GST_TASK_STOPPED;
 }

 static gboolean
 gst_thread_scheduler_task_start (GstTask * task)
 {
   GstThreadSchedulerTask *ttask = GST_THREAD_SCHEDULER_TASK (task);
   GstThreadScheduler *tsched =
       GST_THREAD_SCHEDULER (GST_OBJECT_PARENT (GST_OBJECT (task)));
   GstTaskState old;
   GStaticRecMutex *lock;

   GST_DEBUG_OBJECT (task, "Starting task %p", task);

   if ((lock = GST_TASK_GET_LOCK (task)) == NULL) {
     lock = g_new (GStaticRecMutex, 1);
     g_static_rec_mutex_init (lock);
     GST_TASK_GET_LOCK (task) = lock;
   }

   GST_LOCK (ttask);
   old = GST_TASK_CAST (ttask)->state;
   GST_TASK_CAST (ttask)->state = GST_TASK_STARTED;
   switch (old) {
     case GST_TASK_STOPPED:
       gst_object_ref (GST_OBJECT (task));
       g_thread_pool_push (tsched->pool, task, NULL);
       break;
     case GST_TASK_PAUSED:
       GST_TASK_SIGNAL (ttask);
       break;
     case GST_TASK_STARTED:
       break;
   }
   GST_UNLOCK (ttask);

   return TRUE;
 }

 static gboolean
 gst_thread_scheduler_task_stop (GstTask * task)
 {
   GstThreadSchedulerTask *ttask = GST_THREAD_SCHEDULER_TASK (task);
   GstTaskState old;

   GST_DEBUG_OBJECT (task, "Stopping task %p", task);

   GST_LOCK (ttask);
   old = GST_TASK_CAST (ttask)->state;
   GST_TASK_CAST (ttask)->state = GST_TASK_STOPPED;
   switch (old) {
     case GST_TASK_STOPPED:
       break;
     case GST_TASK_PAUSED:
       GST_TASK_SIGNAL (ttask);
       break;
     case GST_TASK_STARTED:
       break;
   }
   GST_UNLOCK (ttask);

   return TRUE;
 }

 static gboolean
 gst_thread_scheduler_task_pause (GstTask * task)
 {
   GstThreadSchedulerTask *ttask = GST_THREAD_SCHEDULER_TASK (task);
   GstThreadScheduler *tsched =
       GST_THREAD_SCHEDULER (GST_OBJECT_PARENT (GST_OBJECT (task)));
   GstTaskState old;

   GST_DEBUG_OBJECT (task, "Pausing task %p", task);

   GST_LOCK (ttask);
   old = GST_TASK_CAST (ttask)->state;
   GST_TASK_CAST (ttask)->state = GST_TASK_PAUSED;
   switch (old) {
     case GST_TASK_STOPPED:
       gst_object_ref (GST_OBJECT (task));
       g_thread_pool_push (tsched->pool, task, NULL);
       break;
     case GST_TASK_PAUSED:
       break;
     case GST_TASK_STARTED:
       break;
   }
   GST_UNLOCK (ttask);

   return TRUE;
 }

 static void gst_thread_scheduler_class_init (gpointer g_class, gpointer data);
 static void gst_thread_scheduler_init (GstThreadScheduler * object);

 GType
 gst_thread_scheduler_get_type (void)
 {
   static GType object_type = 0;

   if (object_type == 0) {
     static const GTypeInfo object_info = {
       sizeof (GstThreadSchedulerClass),
       NULL,
       NULL,
       gst_thread_scheduler_class_init,
       NULL,
       NULL,
       sizeof (GstThreadScheduler),
       0,
       (GInstanceInitFunc) gst_thread_scheduler_init
     };

     object_type =
         g_type_register_static (GST_TYPE_SCHEDULER,
         "GstThreadScheduler", &object_info, 0);
   }
   return object_type;
 }

 static void gst_thread_scheduler_setup (GstScheduler * sched);
 static void gst_thread_scheduler_reset (GstScheduler * sched);
 static GstTask *gst_thread_scheduler_create_task (GstScheduler * sched,
     GstTaskFunction func, gpointer data);

 static void
 gst_thread_scheduler_class_init (gpointer klass, gpointer class_data)
 {
   GstSchedulerClass *scheduler = GST_SCHEDULER_CLASS (klass);

   scheduler->setup = gst_thread_scheduler_setup;
   scheduler->reset = gst_thread_scheduler_reset;
   scheduler->create_task = gst_thread_scheduler_create_task;
 }

 static void
 gst_thread_scheduler_func (GstThreadSchedulerTask * ttask,
     GstThreadScheduler * sched)
 {
   GstTask *task = GST_TASK (ttask);

   GST_DEBUG_OBJECT (sched, "Entering task %p, thread %p", task,
       g_thread_self ());

   /* locking order is TASK_LOCK, LOCK */
   GST_TASK_LOCK (task);
   GST_LOCK (task);
   while (G_LIKELY (task->state != GST_TASK_STOPPED)) {
     while (G_UNLIKELY (task->state == GST_TASK_PAUSED)) {
       GST_TASK_UNLOCK (task);
       GST_TASK_SIGNAL (task);
       GST_TASK_WAIT (task);
       GST_UNLOCK (task);
       /* locking order.. */
       GST_TASK_LOCK (task);
       GST_LOCK (task);
       if (task->state == GST_TASK_STOPPED)
         goto done;
     }
     GST_UNLOCK (task);

     task->func (task->data);

     GST_LOCK (task);
   }
 done:
   GST_UNLOCK (task);
   GST_TASK_UNLOCK (task);

   GST_DEBUG_OBJECT (sched, "Exit task %p, thread %p", task, g_thread_self ());

   gst_object_unref (GST_OBJECT (task));
 }

 static void
 gst_thread_scheduler_init (GstThreadScheduler * scheduler)
 {
   scheduler->pool = g_thread_pool_new (
       (GFunc) gst_thread_scheduler_func, scheduler, -1, FALSE, NULL);
 }

 static GstTask *
 gst_thread_scheduler_create_task (GstScheduler * sched, GstTaskFunction func,
     gpointer data)
 {
   GstThreadSchedulerTask *task;

   task =
       GST_THREAD_SCHEDULER_TASK (g_object_new (GST_TYPE_THREAD_SCHEDULER_TASK,
           NULL));
   gst_object_set_parent (GST_OBJECT (task), GST_OBJECT (sched));
   GST_TASK_CAST (task)->func = func;
   GST_TASK_CAST (task)->data = data;

   GST_DEBUG_OBJECT (sched, "Created task %p", task);

   return GST_TASK_CAST (task);
 }

 static void
 gst_thread_scheduler_setup (GstScheduler * sched)
 {
 }

 static void
 gst_thread_scheduler_reset (GstScheduler * sched)
 {
 }

 static gboolean
 plugin_init (GstPlugin * plugin)
 {
   GstSchedulerFactory *factory;

   GST_DEBUG_CATEGORY_INIT (debug_scheduler, "thread", 0, "thread scheduler");

   factory = gst_scheduler_factory_new ("thread",
       "A scheduler using threads", GST_TYPE_THREAD_SCHEDULER);
   if (factory == NULL)
     return FALSE;

   gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory));
   return TRUE;
 }

 GST_PLUGIN_DEFINE (GST_VERSION_MAJOR, GST_VERSION_MINOR, "gstthreadscheduler",
     "a thread scheduler", plugin_init, VERSION, GST_LICENSE, GST_PACKAGE,
     GST_ORIGIN)
	/* GStreamer2
	* Copyright (C) 2004 Wim Taymans <wim@fluendo.com>
	*
	* threadscheduler.c: scheduler using threads
	*
	* 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.
	*/

	#ifdef HAVE_CONFIG_H
	# include "config.h"
	#endif

	#include <gst/gst.h>
	#include "../gst-i18n-lib.h"

	GST_DEBUG_CATEGORY_STATIC (debug_scheduler);
	#define GST_CAT_DEFAULT debug_scheduler

	#define GST_TYPE_THREAD_SCHEDULER \
	(gst_thread_scheduler_get_type ())
	#define GST_THREAD_SCHEDULER(obj) \
	(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_THREAD_SCHEDULER,GstThreadScheduler))
	#define GST_THREAD_SCHEDULER_CLASS(klass) \
	(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_THREAD_SCHEDULER,GstThreadSchedulerClass))
	#define GST_IS_THREAD_SCHEDULER(obj) \
	(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_THREAD_SCHEDULER))
	#define GST_IS_THREAD_SCHEDULER_CLASS(obj) \
	(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_THREAD_SCHEDULER))

	#define SCHED(element) (GST_THREAD_SCHEDULER ((element)->sched))

	GType gst_thread_scheduler_get_type (void);

	typedef struct _GstThreadScheduler GstThreadScheduler;
	typedef struct _GstThreadSchedulerClass GstThreadSchedulerClass;

	struct _GstThreadScheduler
	{
	GstScheduler scheduler;

	GThreadPool *pool;
	};

	struct _GstThreadSchedulerClass
	{
	GstSchedulerClass scheduler_class;
	};

	#define ELEMENT_PRIVATE(element) GST_ELEMENT (element)->sched_private
	#define PAD_PRIVATE(pad) (GST_REAL_PAD (pad))->sched_private

	#define GST_TYPE_THREAD_SCHEDULER_TASK \
	(gst_thread_scheduler_task_get_type ())
	#define GST_THREAD_SCHEDULER_TASK(obj) \
	(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_THREAD_SCHEDULER_TASK,GstThreadSchedulerTask))
	#define GST_THREAD_SCHEDULER_TASK_CLASS(klass) \
	(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_THREAD_SCHEDULER_TASK,GstThreadSchedulerTaskClass))
	#define GST_IS_THREAD_SCHEDULER_TASK(obj) \
	(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_THREAD_SCHEDULER_TASK))
	#define GST_IS_THREAD_SCHEDULER_TASK_CLASS(obj) \
	(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_THREAD_SCHEDULER_TASK))

	typedef struct _GstThreadSchedulerTask GstThreadSchedulerTask;
	typedef struct _GstThreadSchedulerTaskClass GstThreadSchedulerTaskClass;

	struct _GstThreadSchedulerTask
	{
	GstTask task;
	};

	struct _GstThreadSchedulerTaskClass
	{
	GstTaskClass parent_class;
	};

	static void gst_thread_scheduler_task_class_init (gpointer g_class,
	gpointer data);
	static void gst_thread_scheduler_task_init (GstThreadSchedulerTask * object);

	static gboolean gst_thread_scheduler_task_start (GstTask * task);
	static gboolean gst_thread_scheduler_task_stop (GstTask * task);
	static gboolean gst_thread_scheduler_task_pause (GstTask * task);

	GType
	gst_thread_scheduler_task_get_type (void)
	{
	static GType object_type = 0;

	if (object_type == 0) {
	static const GTypeInfo object_info = {
	sizeof (GstThreadSchedulerTaskClass),
	NULL,
	NULL,
	gst_thread_scheduler_task_class_init,
	NULL,
	NULL,
	sizeof (GstThreadSchedulerTask),
	0,
	(GInstanceInitFunc) gst_thread_scheduler_task_init
	};

	object_type =
	g_type_register_static (GST_TYPE_TASK,
	"GstThreadSchedulerTask", &object_info, 0);
	}
	return object_type;
	}

	static void
	gst_thread_scheduler_task_class_init (gpointer klass, gpointer class_data)
	{
	GstTaskClass *task = GST_TASK_CLASS (klass);

	task->start = gst_thread_scheduler_task_start;
	task->stop = gst_thread_scheduler_task_stop;
	task->pause = gst_thread_scheduler_task_pause;
	}

	static void
	gst_thread_scheduler_task_init (GstThreadSchedulerTask * task)
	{
	GST_TASK (task)->state = GST_TASK_STOPPED;
	}

	static gboolean
	gst_thread_scheduler_task_start (GstTask * task)
	{
	GstThreadSchedulerTask *ttask = GST_THREAD_SCHEDULER_TASK (task);
	GstThreadScheduler *tsched =
	GST_THREAD_SCHEDULER (GST_OBJECT_PARENT (GST_OBJECT (task)));
	GstTaskState old;
	GStaticRecMutex *lock;

	GST_DEBUG_OBJECT (task, "Starting task %p", task);

	if ((lock = GST_TASK_GET_LOCK (task)) == NULL) {
	lock = g_new (GStaticRecMutex, 1);
	g_static_rec_mutex_init (lock);
	GST_TASK_GET_LOCK (task) = lock;
	}

	GST_LOCK (ttask);
	old = GST_TASK_CAST (ttask)->state;
	GST_TASK_CAST (ttask)->state = GST_TASK_STARTED;
	switch (old) {
	case GST_TASK_STOPPED:
	gst_object_ref (GST_OBJECT (task));
	g_thread_pool_push (tsched->pool, task, NULL);
	break;
	case GST_TASK_PAUSED:
	GST_TASK_SIGNAL (ttask);
	break;
	case GST_TASK_STARTED:
	break;
	}
	GST_UNLOCK (ttask);

	return TRUE;
	}

	static gboolean
	gst_thread_scheduler_task_stop (GstTask * task)
	{
	GstThreadSchedulerTask *ttask = GST_THREAD_SCHEDULER_TASK (task);
	GstTaskState old;

	GST_DEBUG_OBJECT (task, "Stopping task %p", task);

	GST_LOCK (ttask);
	old = GST_TASK_CAST (ttask)->state;
	GST_TASK_CAST (ttask)->state = GST_TASK_STOPPED;
	switch (old) {
	case GST_TASK_STOPPED:
	break;
	case GST_TASK_PAUSED:
	GST_TASK_SIGNAL (ttask);
	break;
	case GST_TASK_STARTED:
	break;
	}
	GST_UNLOCK (ttask);

	return TRUE;
	}

	static gboolean
	gst_thread_scheduler_task_pause (GstTask * task)
	{
	GstThreadSchedulerTask *ttask = GST_THREAD_SCHEDULER_TASK (task);
	GstThreadScheduler *tsched =
	GST_THREAD_SCHEDULER (GST_OBJECT_PARENT (GST_OBJECT (task)));
	GstTaskState old;

	GST_DEBUG_OBJECT (task, "Pausing task %p", task);

	GST_LOCK (ttask);
	old = GST_TASK_CAST (ttask)->state;
	GST_TASK_CAST (ttask)->state = GST_TASK_PAUSED;
	switch (old) {
	case GST_TASK_STOPPED:
	gst_object_ref (GST_OBJECT (task));
	g_thread_pool_push (tsched->pool, task, NULL);
	break;
	case GST_TASK_PAUSED:
	break;
	case GST_TASK_STARTED:
	break;
	}
	GST_UNLOCK (ttask);

	return TRUE;
	}

	static void gst_thread_scheduler_class_init (gpointer g_class, gpointer data);
	static void gst_thread_scheduler_init (GstThreadScheduler * object);

	GType
	gst_thread_scheduler_get_type (void)
	{
	static GType object_type = 0;

	if (object_type == 0) {
	static const GTypeInfo object_info = {
	sizeof (GstThreadSchedulerClass),
	NULL,
	NULL,
	gst_thread_scheduler_class_init,
	NULL,
	NULL,
	sizeof (GstThreadScheduler),
	0,
	(GInstanceInitFunc) gst_thread_scheduler_init
	};

	object_type =
	g_type_register_static (GST_TYPE_SCHEDULER,
	"GstThreadScheduler", &object_info, 0);
	}
	return object_type;
	}

	static void gst_thread_scheduler_setup (GstScheduler * sched);
	static void gst_thread_scheduler_reset (GstScheduler * sched);
	static GstTask gst_thread_scheduler_create_task (GstScheduler sched,
	GstTaskFunction func, gpointer data);

	static void
	gst_thread_scheduler_class_init (gpointer klass, gpointer class_data)
	{
	GstSchedulerClass *scheduler = GST_SCHEDULER_CLASS (klass);

	scheduler->setup = gst_thread_scheduler_setup;
	scheduler->reset = gst_thread_scheduler_reset;
	scheduler->create_task = gst_thread_scheduler_create_task;
	}

	static void
	gst_thread_scheduler_func (GstThreadSchedulerTask * ttask,
	GstThreadScheduler * sched)
	{
	GstTask *task = GST_TASK (ttask);

	GST_DEBUG_OBJECT (sched, "Entering task %p, thread %p", task,
	g_thread_self ());

	/* locking order is TASK_LOCK, LOCK */
	GST_TASK_LOCK (task);
	GST_LOCK (task);
	while (G_LIKELY (task->state != GST_TASK_STOPPED)) {
	while (G_UNLIKELY (task->state == GST_TASK_PAUSED)) {
	GST_TASK_UNLOCK (task);
	GST_TASK_SIGNAL (task);
	GST_TASK_WAIT (task);
	GST_UNLOCK (task);
	/* locking order.. */
	GST_TASK_LOCK (task);
	GST_LOCK (task);
	if (task->state == GST_TASK_STOPPED)
	goto done;
	}
	GST_UNLOCK (task);

	task->func (task->data);

	GST_LOCK (task);
	}
	done:
	GST_UNLOCK (task);
	GST_TASK_UNLOCK (task);

	GST_DEBUG_OBJECT (sched, "Exit task %p, thread %p", task, g_thread_self ());

	gst_object_unref (GST_OBJECT (task));
	}

	static void
	gst_thread_scheduler_init (GstThreadScheduler * scheduler)
	{
	scheduler->pool = g_thread_pool_new (
	(GFunc) gst_thread_scheduler_func, scheduler, -1, FALSE, NULL);
	}

	static GstTask *
	gst_thread_scheduler_create_task (GstScheduler * sched, GstTaskFunction func,
	gpointer data)
	{
	GstThreadSchedulerTask *task;

	task =
	GST_THREAD_SCHEDULER_TASK (g_object_new (GST_TYPE_THREAD_SCHEDULER_TASK,
	NULL));
	gst_object_set_parent (GST_OBJECT (task), GST_OBJECT (sched));
	GST_TASK_CAST (task)->func = func;
	GST_TASK_CAST (task)->data = data;

	GST_DEBUG_OBJECT (sched, "Created task %p", task);

	return GST_TASK_CAST (task);
	}

	static void
	gst_thread_scheduler_setup (GstScheduler * sched)
	{
	}

	static void
	gst_thread_scheduler_reset (GstScheduler * sched)
	{
	}

	static gboolean
	plugin_init (GstPlugin * plugin)
	{
	GstSchedulerFactory *factory;

	GST_DEBUG_CATEGORY_INIT (debug_scheduler, "thread", 0, "thread scheduler");

	factory = gst_scheduler_factory_new ("thread",
	"A scheduler using threads", GST_TYPE_THREAD_SCHEDULER);
	if (factory == NULL)
	return FALSE;

	gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory));
	return TRUE;
	}

	GST_PLUGIN_DEFINE (GST_VERSION_MAJOR, GST_VERSION_MINOR, "gstthreadscheduler",
	"a thread scheduler", plugin_init, VERSION, GST_LICENSE, GST_PACKAGE,
	GST_ORIGIN)