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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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e6a59c8a62
Original commit message from CVS: Merged HEAD from BRANCH-INCSCHED1-200104161 into BRANCH-INCSCHED1.
360 lines
8.9 KiB
C
360 lines
8.9 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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* gstautoplug.c: Autoplugging of pipelines
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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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//#define GST_DEBUG_ENABLED
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#include "gst_private.h"
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#include "gstautoplug.h"
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#include "gstplugin.h"
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GList* _gst_autoplugfactories;
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enum {
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NEW_OBJECT,
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LAST_SIGNAL
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};
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enum {
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ARG_0,
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/* FILL ME */
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};
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static void gst_autoplug_class_init (GstAutoplugClass *klass);
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static void gst_autoplug_init (GstAutoplug *autoplug);
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static GstObjectClass *parent_class = NULL;
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static guint gst_autoplug_signals[LAST_SIGNAL] = { 0 };
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GtkType gst_autoplug_get_type(void)
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{
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static GtkType autoplug_type = 0;
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if (!autoplug_type) {
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static const GtkTypeInfo autoplug_info = {
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"GstAutoplug",
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sizeof(GstAutoplug),
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sizeof(GstAutoplugClass),
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(GtkClassInitFunc)gst_autoplug_class_init,
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(GtkObjectInitFunc)gst_autoplug_init,
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(GtkArgSetFunc)NULL,
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(GtkArgGetFunc)NULL,
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(GtkClassInitFunc)NULL,
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};
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autoplug_type = gtk_type_unique (GST_TYPE_OBJECT, &autoplug_info);
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}
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return autoplug_type;
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}
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static void
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gst_autoplug_class_init(GstAutoplugClass *klass)
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{
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GtkObjectClass *gtkobject_class;
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GstObjectClass *gstobject_class;
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gtkobject_class = (GtkObjectClass*) klass;
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gstobject_class = (GstObjectClass*) klass;
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parent_class = gtk_type_class(GST_TYPE_OBJECT);
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gst_autoplug_signals[NEW_OBJECT] =
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gtk_signal_new ("new_object", GTK_RUN_LAST, gtkobject_class->type,
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GTK_SIGNAL_OFFSET (GstAutoplugClass, new_object),
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gtk_marshal_NONE__POINTER, GTK_TYPE_NONE, 1,
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GST_TYPE_OBJECT);
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gtk_object_class_add_signals (gtkobject_class, gst_autoplug_signals, LAST_SIGNAL);
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}
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static void gst_autoplug_init(GstAutoplug *autoplug)
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{
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}
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void
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_gst_autoplug_initialize (void)
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{
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_gst_autoplugfactories = NULL;
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}
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/**
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* gst_autoplug_signal_new_object:
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* @autoplug: The autoplugger to emit the signal
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* @object: The object that is passed to the signal
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*
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* Emit a new_object signal. autopluggers are supposed to
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* emit this signal whenever a new object has been added to
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* the autoplugged pipeline.
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*
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*/
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void
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gst_autoplug_signal_new_object (GstAutoplug *autoplug, GstObject *object)
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{
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gtk_signal_emit (GTK_OBJECT (autoplug), gst_autoplug_signals[NEW_OBJECT], object);
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}
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/**
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* gst_autoplug_to_caps:
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* @autoplug: The autoplugger perform the autoplugging
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* @srccaps: The source cpabilities
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* @sinkcaps: The target capabilities
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* @...: more target capabilities
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*
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* Perform the autoplugging procedure on the given autoplugger.
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* The src caps will be connected to the sink caps.
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*
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* Returns: A new Element that connects the src caps to the sink caps.
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*/
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GstElement*
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gst_autoplug_to_caps (GstAutoplug *autoplug, GstCaps *srccaps, GstCaps *sinkcaps, ...)
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{
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GstAutoplugClass *oclass;
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GstElement *element = NULL;
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va_list args;
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va_start (args, sinkcaps);
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oclass = GST_AUTOPLUG_CLASS (GTK_OBJECT (autoplug)->klass);
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if (oclass->autoplug_to_caps)
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element = (oclass->autoplug_to_caps) (autoplug, srccaps, sinkcaps, args);
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va_end (args);
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return element;
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}
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/**
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* gst_autoplug_to_renderers:
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* @autoplug: The autoplugger perform the autoplugging
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* @srccaps: The source cpabilities
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* @target: The target element
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* @...: more target elements
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*
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* Perform the autoplugging procedure on the given autoplugger.
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* The src caps will be connected to the target elements.
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*
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* Returns: A new Element that connects the src caps to the target elements.
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*/
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GstElement*
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gst_autoplug_to_renderers (GstAutoplug *autoplug, GstCaps *srccaps, GstElement *target, ...)
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{
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GstAutoplugClass *oclass;
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GstElement *element = NULL;
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va_list args;
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va_start (args, target);
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oclass = GST_AUTOPLUG_CLASS (GTK_OBJECT (autoplug)->klass);
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if (oclass->autoplug_to_renderers)
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element = (oclass->autoplug_to_renderers) (autoplug, srccaps, target, args);
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va_end (args);
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return element;
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}
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/**
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* gst_autoplugfactory_new:
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* @name: name of autoplugfactory to create
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* @longdesc: long description of autoplugfactory to create
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* @type: the gtk type of the GstAutoplug element of this factory
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*
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* Create a new autoplugfactory with the given parameters
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*
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* Returns: a new #GstAutoplugFactory.
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*/
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GstAutoplugFactory*
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gst_autoplugfactory_new (const gchar *name, const gchar *longdesc, GtkType type)
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{
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GstAutoplugFactory *factory;
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g_return_val_if_fail(name != NULL, NULL);
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factory = g_new0(GstAutoplugFactory, 1);
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factory->name = g_strdup(name);
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factory->longdesc = g_strdup (longdesc);
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factory->type = type;
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_gst_autoplugfactories = g_list_prepend (_gst_autoplugfactories, factory);
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return factory;
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}
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/**
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* gst_autoplugfactory_destroy:
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* @factory: factory to destroy
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*
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* Removes the autoplug from the global list.
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*/
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void
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gst_autoplugfactory_destroy (GstAutoplugFactory *factory)
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{
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g_return_if_fail (factory != NULL);
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_gst_autoplugfactories = g_list_remove (_gst_autoplugfactories, factory);
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// we don't free the struct bacause someone might have a handle to it..
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}
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/**
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* gst_autoplugfactory_find:
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* @name: name of autoplugfactory to find
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*
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* Search for an autoplugfactory of the given name.
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*
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* Returns: #GstAutoplugFactory if found, NULL otherwise
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*/
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GstAutoplugFactory*
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gst_autoplugfactory_find (const gchar *name)
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{
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GList *walk;
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GstAutoplugFactory *factory;
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g_return_val_if_fail(name != NULL, NULL);
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GST_DEBUG (0,"gstautoplug: find \"%s\"\n", name);
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walk = _gst_autoplugfactories;
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while (walk) {
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factory = (GstAutoplugFactory *)(walk->data);
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if (!strcmp (name, factory->name))
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return factory;
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walk = g_list_next (walk);
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}
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return NULL;
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}
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/**
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* gst_autoplugfactory_get_list:
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*
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* Get the global list of autoplugfactories.
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*
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* Returns: GList of type #GstAutoplugFactory
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*/
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GList*
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gst_autoplugfactory_get_list (void)
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{
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return _gst_autoplugfactories;
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}
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/**
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* gst_autoplugfactory_create:
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* @factory: the factory used to create the instance
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*
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* Create a new #GstAutoplug instance from the
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* given autoplugfactory.
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*
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* Returns: A new #GstAutoplug instance.
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*/
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GstAutoplug*
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gst_autoplugfactory_create (GstAutoplugFactory *factory)
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{
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GstAutoplug *new = NULL;
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g_return_val_if_fail (factory != NULL, NULL);
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if (factory->type == 0){
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factory = gst_plugin_load_autoplugfactory (factory->name);
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}
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g_return_val_if_fail (factory != NULL, NULL);
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g_return_val_if_fail (factory->type != 0, NULL);
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new = GST_AUTOPLUG (gtk_type_new (factory->type));
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return new;
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}
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/**
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* gst_autoplugfactory_make:
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* @name: the name of the factory used to create the instance
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*
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* Create a new #GstAutoplug instance from the
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* autoplugfactory with the given name.
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*
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* Returns: A new #GstAutoplug instance.
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*/
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GstAutoplug*
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gst_autoplugfactory_make (const gchar *name)
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{
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GstAutoplugFactory *factory;
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g_return_val_if_fail (name != NULL, NULL);
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factory = gst_autoplugfactory_find (name);
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if (factory == NULL)
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return NULL;
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return gst_autoplugfactory_create (factory);;
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}
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/**
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* gst_autoplugfactory_save_thyself:
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* @factory: The facory to save
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* @parent: the parent XML node pointer
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*
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* Save the autoplugfactory into an XML representation
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*
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* Returns: The new XML parent.
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*/
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xmlNodePtr
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gst_autoplugfactory_save_thyself (GstAutoplugFactory *factory, xmlNodePtr parent)
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{
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g_return_val_if_fail(factory != NULL, NULL);
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xmlNewChild(parent,NULL,"name",factory->name);
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xmlNewChild(parent,NULL,"longdesc", factory->longdesc);
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return parent;
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}
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/**
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* gst_autoplugfactory_load_thyself:
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* @parent: the parent XML node pointer
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*
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* Load an autoplugfactory from the given XML parent node.
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*
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* Returns: A new factory based on the XML node.
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*/
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GstAutoplugFactory*
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gst_autoplugfactory_load_thyself (xmlNodePtr parent)
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{
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GstAutoplugFactory *factory = g_new0(GstAutoplugFactory, 1);
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xmlNodePtr children = parent->xmlChildrenNode;
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while (children) {
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if (!strcmp(children->name, "name")) {
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factory->name = xmlNodeGetContent(children);
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}
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if (!strcmp(children->name, "longdesc")) {
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factory->longdesc = xmlNodeGetContent(children);
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}
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children = children->next;
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}
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_gst_autoplugfactories = g_list_prepend (_gst_autoplugfactories, factory);
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return factory;
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}
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