gstreamer/gst/gsttask.c
Wim Taymans add280cd10 gst/: Implement gst_pad_pause/start/stop_task(), take STREAM lock in task function.
Original commit message from CVS:
* gst/base/gstadapter.c: (gst_adapter_peek), (gst_adapter_flush):
* gst/base/gstbasesink.c: (gst_basesink_preroll_queue_push),
(gst_basesink_finish_preroll), (gst_basesink_chain),
(gst_basesink_loop), (gst_basesink_activate),
(gst_basesink_change_state):
* gst/base/gstbasesrc.c: (gst_basesrc_do_seek),
(gst_basesrc_get_range), (gst_basesrc_loop),
(gst_basesrc_activate):
* gst/elements/gsttee.c: (gst_tee_sink_activate):
* gst/gstpad.c: (gst_pad_dispose), (gst_real_pad_class_init),
(gst_real_pad_init), (gst_real_pad_set_property),
(gst_real_pad_get_property), (gst_pad_set_active),
(gst_pad_is_active), (gst_pad_get_query_types), (gst_pad_unlink),
(gst_pad_link_prepare), (gst_pad_link), (gst_pad_get_real_parent),
(gst_real_pad_get_caps_unlocked), (gst_pad_peer_get_caps),
(gst_pad_accept_caps), (gst_pad_get_peer), (gst_pad_realize),
(gst_pad_event_default_dispatch), (gst_pad_event_default),
(gst_pad_dispatcher), (gst_pad_query), (gst_real_pad_dispose),
(gst_pad_save_thyself), (handle_pad_block), (gst_pad_chain),
(gst_pad_push), (gst_pad_get_range), (gst_pad_pull_range),
(gst_pad_send_event), (gst_pad_start_task), (gst_pad_pause_task),
(gst_pad_stop_task):
* gst/gstpad.h:
* gst/gstqueue.c: (gst_queue_handle_sink_event), (gst_queue_chain),
(gst_queue_loop), (gst_queue_src_activate):
* gst/gsttask.c: (gst_task_init), (gst_task_set_lock),
(gst_task_get_state):
* gst/gsttask.h:
* gst/schedulers/threadscheduler.c:
(gst_thread_scheduler_task_start), (gst_thread_scheduler_func):
Implement gst_pad_pause/start/stop_task(), take STREAM lock
in task function.
Remove ACTIVE pad flag, use FLUSHING everywhere
Added _pad_chain(), _pad_get_range() to call chain/getrange
functions.
Add locks around IS_FLUSHING when reading.
Take STREAM lock in chain(), get_range() functions so plugins
don't need to take it anymore.
2005-05-25 11:50:11 +00:00

229 lines
4.4 KiB
C

/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2005 Wim Taymans <wim@fluendo.com>
*
* gsttask.c: Streaming tasks
*
* 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.
*/
#include "gst_private.h"
#include "gstinfo.h"
#include "gsttask.h"
static void gst_task_class_init (GstTaskClass * klass);
static void gst_task_init (GstTask * task);
static void gst_task_dispose (GObject * object);
static GstObjectClass *parent_class = NULL;
GType
gst_task_get_type (void)
{
static GType _gst_task_type = 0;
if (!_gst_task_type) {
static const GTypeInfo task_info = {
sizeof (GstTaskClass),
NULL,
NULL,
(GClassInitFunc) gst_task_class_init,
NULL,
NULL,
sizeof (GstTask),
0,
(GInstanceInitFunc) gst_task_init,
NULL
};
_gst_task_type =
g_type_register_static (GST_TYPE_OBJECT, "GstTask",
&task_info, G_TYPE_FLAG_ABSTRACT);
}
return _gst_task_type;
}
static void
gst_task_class_init (GstTaskClass * klass)
{
GObjectClass *gobject_class;
gobject_class = (GObjectClass *) klass;
parent_class = g_type_class_ref (GST_TYPE_OBJECT);
gobject_class->dispose = GST_DEBUG_FUNCPTR (gst_task_dispose);
}
static void
gst_task_init (GstTask * task)
{
task->lock = NULL;
task->cond = g_cond_new ();
task->state = GST_TASK_STOPPED;
}
static void
gst_task_dispose (GObject * object)
{
GstTask *task = GST_TASK (object);
GST_DEBUG ("task %p dispose", task);
g_cond_free (task->cond);
G_OBJECT_CLASS (parent_class)->dispose (object);
}
/**
* gst_task_create:
* @func: The #GstTaskFunction to use
* @data: User data to pass to @func
*
* Create a new Task that will repeadedly call the provided @func
* with @data as a parameter. Typically the task will run in
* a new thread.
*
* Returns: A new #GstTask.
*
* MT safe.
*/
GstTask *
gst_task_create (GstTaskFunction func, gpointer data)
{
return NULL;
}
/**
* gst_task_set_lock:
* @task: The #GstTask to use
* @mutex: The GMutex to use
*
* Set the mutex used by the task.
*
* MT safe.
*/
void
gst_task_set_lock (GstTask * task, GStaticRecMutex * mutex)
{
GST_LOCK (task);
task->lock = mutex;
GST_UNLOCK (task);
}
/**
* gst_task_get_state:
* @task: The #GstTask to query
*
* Get the current state of the task.
*
* Returns: The #GstTaskState of the task
*
* MT safe.
*/
GstTaskState
gst_task_get_state (GstTask * task)
{
GstTaskState result;
g_return_val_if_fail (GST_IS_TASK (task), GST_TASK_STOPPED);
GST_LOCK (task);
result = task->state;
GST_UNLOCK (task);
return result;
}
/**
* gst_task_start:
* @task: The #GstTask to start
*
* Starts @task.
*
* Returns: TRUE if the task could be started.
*
* MT safe.
*/
gboolean
gst_task_start (GstTask * task)
{
GstTaskClass *tclass;
gboolean result = FALSE;
g_return_val_if_fail (GST_IS_TASK (task), FALSE);
tclass = GST_TASK_GET_CLASS (task);
if (tclass->start)
result = tclass->start (task);
return result;
}
/**
* gst_task_stop:
* @task: The #GstTask to stop
*
* Stops @task.
*
* Returns: TRUE if the task could be stopped.
*
* MT safe.
*/
gboolean
gst_task_stop (GstTask * task)
{
GstTaskClass *tclass;
gboolean result = FALSE;
g_return_val_if_fail (GST_IS_TASK (task), FALSE);
tclass = GST_TASK_GET_CLASS (task);
if (tclass->stop)
result = tclass->stop (task);
return result;
}
/**
* gst_task_pause:
* @task: The #GstTask to pause
*
* Pauses @task.
*
* Returns: TRUE if the task could be paused.
*
* MT safe.
*/
gboolean
gst_task_pause (GstTask * task)
{
GstTaskClass *tclass;
gboolean result = FALSE;
g_return_val_if_fail (GST_IS_TASK (task), FALSE);
tclass = GST_TASK_GET_CLASS (task);
if (tclass->pause)
result = tclass->pause (task);
return result;
}