gstreamer/gst/gstpipeline.c
Wim Taymans 2dd7336e68 Reset the scheduler when going to NULL
Original commit message from CVS:
Reset the scheduler when going to NULL
2002-12-03 21:33:29 +00:00

168 lines
4.3 KiB
C

/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2000 Wim Taymans <wtay@chello.be>
*
* gstpipeline.c: Overall pipeline management element
*
* 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 "gstpipeline.h"
#include "gstlog.h"
#include "gstscheduler.h"
GstElementDetails gst_pipeline_details = {
"Pipeline object",
"Generic/Bin",
"Complete pipeline object",
VERSION,
"Erik Walthinsen <omega@cse.ogi.edu>",
"(C) 1999",
};
/* Pipeline signals and args */
enum {
/* FILL ME */
LAST_SIGNAL
};
enum {
ARG_0,
/* FILL ME */
};
static void gst_pipeline_class_init (GstPipelineClass *klass);
static void gst_pipeline_init (GstPipeline *pipeline);
static void gst_pipeline_dispose (GObject *object);
static GstElementStateReturn gst_pipeline_change_state (GstElement *element);
static GstBinClass *parent_class = NULL;
/* static guint gst_pipeline_signals[LAST_SIGNAL] = { 0 }; */
GType
gst_pipeline_get_type (void) {
static GType pipeline_type = 0;
if (!pipeline_type) {
static const GTypeInfo pipeline_info = {
sizeof(GstPipelineClass),
NULL,
NULL,
(GClassInitFunc)gst_pipeline_class_init,
NULL,
NULL,
sizeof(GstPipeline),
0,
(GInstanceInitFunc)gst_pipeline_init,
NULL
};
pipeline_type = g_type_register_static (GST_TYPE_BIN, "GstPipeline", &pipeline_info, 0);
}
return pipeline_type;
}
static void
gst_pipeline_class_init (GstPipelineClass *klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass *)klass;
gstelement_class = (GstElementClass*)klass;
parent_class = g_type_class_ref (gst_bin_get_type ());
gobject_class->dispose = GST_DEBUG_FUNCPTR (gst_pipeline_dispose);
gstelement_class->change_state = GST_DEBUG_FUNCPTR (gst_pipeline_change_state);
}
static void
gst_pipeline_init (GstPipeline *pipeline)
{
GstScheduler *scheduler;
/* pipelines are managing bins */
GST_FLAG_SET (pipeline, GST_BIN_FLAG_MANAGER);
/* get an instance of the default scheduler */
scheduler = gst_scheduler_factory_make (NULL, GST_ELEMENT (pipeline));
/* FIXME need better error handling */
if (scheduler == NULL) {
g_error ("Critical error: could not get a scheduler - \
are you sure you have a registry ? Run gst-register as root \
if you haven't done so yet.");
}
}
static void
gst_pipeline_dispose (GObject *object)
{
GstPipeline *pipeline = GST_PIPELINE (object);
G_OBJECT_CLASS (parent_class)->dispose (object);
if (GST_ELEMENT_SCHED (pipeline)) {
gst_object_unref (GST_OBJECT (GST_ELEMENT_SCHED (pipeline)));
GST_ELEMENT_SCHED (pipeline) = NULL;
}
}
/**
* gst_pipeline_new:
* @name: name of new pipeline
*
* Create a new pipeline with the given name.
*
* Returns: newly created GstPipeline
*/
GstElement*
gst_pipeline_new (const gchar *name)
{
return gst_element_factory_make ("pipeline", name);
}
static GstElementStateReturn
gst_pipeline_change_state (GstElement *element)
{
switch (GST_STATE_TRANSITION (element)) {
case GST_STATE_NULL_TO_READY:
gst_scheduler_setup (GST_ELEMENT_SCHED (element));
break;
case GST_STATE_READY_TO_PAUSED:
case GST_STATE_PAUSED_TO_PLAYING:
case GST_STATE_PLAYING_TO_PAUSED:
case GST_STATE_PAUSED_TO_READY:
break;
case GST_STATE_READY_TO_NULL:
if (GST_ELEMENT_SCHED (element)) {
gst_scheduler_reset (GST_ELEMENT_SCHED (element));
}
break;
}
if (GST_ELEMENT_CLASS (parent_class)->change_state)
return GST_ELEMENT_CLASS (parent_class)->change_state (element);
return GST_STATE_SUCCESS;
}