gstreamer/gst/gstpipeline.c

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/* 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 "gstinfo.h"
#include "gstscheduler.h"
static GstElementDetails gst_pipeline_details = GST_ELEMENT_DETAILS (
"Pipeline object",
"Generic/Bin",
"Complete pipeline object",
"Erik Walthinsen <omega@cse.ogi.edu>"
);
/* Pipeline signals and args */
enum {
/* FILL ME */
LAST_SIGNAL
};
enum {
ARG_0
/* FILL ME */
};
static void gst_pipeline_base_init (gpointer g_class);
static void gst_pipeline_class_init (gpointer g_class,
gpointer class_data);
static void gst_pipeline_init (GTypeInstance *instance,
gpointer g_class);
static void gst_pipeline_dispose (GObject * object);
static GstElementStateReturn gst_pipeline_change_state (GstElement * element);
WARNING: Don't grab this updated unless you're really, REALLY sure. Original commit message from CVS: WARNING: Don't grab this updated unless you're really, REALLY sure. WARNING: Wait for the next one. Whole lotta changes here, including a few random bits: examples/*/Makefile: updated to use `libtool gcc`, not just `gcc` gst/ gstbuffer.h: updated to new flag style gst.c, gstdebug.h: added new debugging for function ptrs gstpipeline.c: set type of parent_class to the class, not the object gstthread.c: ditto plugins/ cdparanoia/cdparanoia.c: added an argument type, updated some defaults cobin/spindentity.c: updated to new do/while loopfunction style mp3encode/lame/gstlame.c: argument types, whole lotta lame options tests/: various changes Now, for the big changes: Once again, the scheduling system has changed. And once again, it broke a whole bunch of things. The gist of the change is that there is now a function pointer for gst_pad_push and gst_pad_pull, instead of a hard-wired function. Well, currently they are functions, but that's for debugging purposes only, they just call the function pointer after spewing lots of DEBUG(). This changed the GstPad structure a bit, and the GstPad API as well. Where elements used to provide chain() and pull() functions, they provide chain() and get() functions. gst_pad_set_pull[region]_function has been changed to get_pad_set_get[region]_function. This means all the elements out there that used to have pull functions need to be updated. The calls to that function have been changed in the normal elements, but the names of the functions passed is still _pull[region](), which is an aesthetic issue more than anything. As for what doesn't work yet, just about anything dealing with Connections is hosed, meaning threaded stuff won't work. This will be fixed about 12 hours from now, after I've slept, etc. The simplefake.c test works in both cothreaded and chained cases, but not much else will work due to the Connection problem. Needless to say, don't grab this unless you *need* these features *now*, else wait to update this stuff until tomorrow. I'm going to sleep now.
2000-12-16 10:18:09 +00:00
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),
gst_pipeline_base_init,
NULL,
(GClassInitFunc)gst_pipeline_class_init,
NULL,
NULL,
sizeof(GstPipeline),
0,
gst_pipeline_init,
NULL
};
pipeline_type = g_type_register_static (GST_TYPE_BIN, "GstPipeline", &pipeline_info, 0);
}
return pipeline_type;
}
static void
gst_pipeline_base_init (gpointer g_class)
{
GstElementClass *gstelement_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_set_details (gstelement_class, &gst_pipeline_details);
}
static void
gst_pipeline_class_init (gpointer g_class, gpointer class_data)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (g_class);
GstElementClass *gstelement_class = GST_ELEMENT_CLASS (g_class);
GstPipelineClass *klass = GST_PIPELINE_CLASS (g_class);
parent_class = g_type_class_peek_parent (klass);
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 (GTypeInstance *instance, gpointer g_class)
{
GstScheduler *scheduler;
GstPipeline *pipeline = GST_PIPELINE (instance);
/* 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) {
const gchar *name = gst_scheduler_factory_get_default_name ();
g_error ("Critical error: could not get scheduler \"%s\"\n"
"Are you sure you have a registry ?\n"
"Run gst-register as root if you haven't done so yet.", name);
}
}
static void
gst_pipeline_dispose (GObject *object)
{
GstPipeline *pipeline = GST_PIPELINE (object);
G_OBJECT_CLASS (parent_class)->dispose (object);
gst_object_replace ((GstObject **)&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:
/* FIXME: calling gst_scheduler_reset() here is bad, since we
* might not be in cothread 0 */
#if 0
if (GST_ELEMENT_SCHED (element)) {
gst_scheduler_reset (GST_ELEMENT_SCHED (element));
}
#endif
break;
}
if (GST_ELEMENT_CLASS (parent_class)->change_state)
return GST_ELEMENT_CLASS (parent_class)->change_state (element);
return GST_STATE_SUCCESS;
}