gstreamer_core/gst/gstpadtemplate.c
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Tue, 31 Aug 2010 15:30:33 +0300
branchRCL_3
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permissions -rw-r--r--
Revision: 201010 Kit: 201035
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/* 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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 * gstpadtemplate.c: Templates for pad creation
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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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/**
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 * SECTION:gstpadtemplate
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 * @short_description: Describe the media type of a pad.
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 * @see_also: #GstPad, #GstElementFactory
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 *
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 * Padtemplates describe the possible media types a pad or an elementfactory can
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 * handle. This allows for both inspection of handled types before loading the
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 * element plugin as well as identifying pads on elements that are not yet
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 * created (request or sometimes pads).
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 *
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 * Pad and PadTemplates have #GstCaps attached to it to describe the media type
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 * they are capable of dealing with. gst_pad_template_get_caps() or 
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 * GST_PAD_TEMPLATE_CAPS() are used to get the caps of a padtemplate. It's not 
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 * possible to modify the caps of a padtemplate after creation.
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 *
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 * PadTemplates have a #GstPadPresence property which identifies the lifetime
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 * of the pad and that can be retrieved with GST_PAD_TEMPLATE_PRESENCE(). Also 
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 * the direction of the pad can be retrieved from the #GstPadTemplate with 
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 * GST_PAD_TEMPLATE_DIRECTION().
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 *
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 * The GST_PAD_TEMPLATE_NAME_TEMPLATE () is important for GST_PAD_REQUEST pads
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 * because it has to be used as the name in the gst_element_request_pad_by_name()
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 * call to instantiate a pad from this template.
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 *
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 * Padtemplates can be created with gst_pad_template_new() or with 
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 * gst_static_pad_template_get (), which creates a #GstPadTemplate from a
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 * #GstStaticPadTemplate that can be filled with the
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 * convenient GST_STATIC_PAD_TEMPLATE() macro. 
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 *
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 * A padtemplate can be used to create a pad (see gst_pad_new_from_template() 
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 * or gst_pad_new_from_static_template ()) or to add to an element class 
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 * (see gst_element_class_add_pad_template ()).
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 *
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 * The following code example shows the code to create a pad from a padtemplate.
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 * <example>
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 * <title>Create a pad from a padtemplate</title>
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 *   <programlisting>
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 *   GstStaticPadTemplate my_template =
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 *   GST_STATIC_PAD_TEMPLATE (
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 *     "sink",          // the name of the pad
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 *     GST_PAD_SINK,    // the direction of the pad
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 *     GST_PAD_ALWAYS,  // when this pad will be present
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 *     GST_STATIC_CAPS (        // the capabilities of the padtemplate
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 *       "audio/x-raw-int, "
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 *         "channels = (int) [ 1, 6 ]"
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 *     )
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 *   )
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 *   void
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 *   my_method (void)
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 *   {
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 *     GstPad *pad;
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 *     pad = gst_pad_new_from_static_template (&amp;my_template, "sink");
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 *     ...
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 *   }
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 *   </programlisting>
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 * </example>
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 *
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 * The following example shows you how to add the padtemplate to an
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 * element class, this is usually done in the base_init of the class:
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 * <informalexample>
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 *   <programlisting>
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 *   static void
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 *   my_element_base_init (gpointer g_class)
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 *   {
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 *     GstElementClass *gstelement_class = GST_ELEMENT_CLASS (g_class);
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 *    
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 *     gst_element_class_add_pad_template (gstelement_class,
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 *         gst_static_pad_template_get (&amp;my_template));
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 *   }
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 *   </programlisting>
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 * </informalexample>
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 *
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 * Last reviewed on 2006-02-14 (0.10.3)
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 */
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#include "gst_private.h"
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#include "gstpad.h"
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#include "gstpadtemplate.h"
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#include "gstenumtypes.h"
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#include "gstmarshal.h"
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#include "gstutils.h"
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#include "gstinfo.h"
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#include "gsterror.h"
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#include "gstvalue.h"
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#define GST_CAT_DEFAULT GST_CAT_PADS
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enum
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{
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  PROP_NAME_TEMPLATE = 1,
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  PROP_DIRECTION,
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  PROP_PRESENCE,
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  PROP_CAPS
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};
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enum
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{
0
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  TEMPL_PAD_CREATED,
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  /* FILL ME */
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  LAST_SIGNAL
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};
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static GstObject *parent_class = NULL;
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static guint gst_pad_template_signals[LAST_SIGNAL] = { 0 };
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static void gst_pad_template_dispose (GObject * object);
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static void gst_pad_template_set_property (GObject * object, guint prop_id,
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    const GValue * value, GParamSpec * pspec);
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static void gst_pad_template_get_property (GObject * object, guint prop_id,
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    GValue * value, GParamSpec * pspec);
0
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G_DEFINE_TYPE (GstPadTemplate, gst_pad_template, GST_TYPE_OBJECT);
0
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static void
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gst_pad_template_class_init (GstPadTemplateClass * klass)
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{
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  GObjectClass *gobject_class;
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  GstObjectClass *gstobject_class;
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  gobject_class = (GObjectClass *) klass;
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  gstobject_class = (GstObjectClass *) klass;
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  parent_class = g_type_class_peek_parent (klass);
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  /**
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   * GstPadTemplate::pad-created:
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   * @pad_template: the object which received the signal.
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   * @pad: the pad that was created.
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   *
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   * This signal is fired when an element creates a pad from this template.
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   */
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  gst_pad_template_signals[TEMPL_PAD_CREATED] =
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      g_signal_new ("pad-created", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
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      G_STRUCT_OFFSET (GstPadTemplateClass, pad_created),
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      NULL, NULL, gst_marshal_VOID__OBJECT, G_TYPE_NONE, 1, GST_TYPE_PAD);
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  gobject_class->dispose = gst_pad_template_dispose;
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  gobject_class->get_property = gst_pad_template_get_property;
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  gobject_class->set_property = gst_pad_template_set_property;
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  /**
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   * GstPadTemplate:name-template
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   *
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   * The name template of the pad template.
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   *
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   * Since: 0.10.21
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   */
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  g_object_class_install_property (gobject_class, PROP_NAME_TEMPLATE,
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      g_param_spec_string ("name-template", "Name template",
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          "The name template of the pad template", NULL,
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          G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_STRINGS));
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  /**
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   * GstPadTemplate:direction
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   *
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   * The direction of the pad described by the pad template.
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   *
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   * Since: 0.10.21
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   */
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  g_object_class_install_property (gobject_class, PROP_DIRECTION,
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      g_param_spec_enum ("direction", "Direction",
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          "The direction of the pad described by the pad template",
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          GST_TYPE_PAD_DIRECTION, GST_PAD_UNKNOWN,
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          G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_STRINGS));
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  /**
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   * GstPadTemplate:presence
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   *
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   * When the pad described by the pad template will become available.
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   *
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   * Since: 0.10.21
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   */
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  g_object_class_install_property (gobject_class, PROP_PRESENCE,
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      g_param_spec_enum ("presence", "Presence",
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          "When the pad described by the pad template will become available",
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          GST_TYPE_PAD_PRESENCE, GST_PAD_ALWAYS,
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          G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_STRINGS));
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  /**
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   * GstPadTemplate:caps
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   *
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   * The capabilities of the pad described by the pad template.
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   *
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   * Since: 0.10.21
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   */
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  g_object_class_install_property (gobject_class, PROP_CAPS,
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      g_param_spec_boxed ("caps", "Caps",
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          "The capabilities of the pad described by the pad template",
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          GST_TYPE_CAPS,
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          G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_STRINGS));
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0
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  gstobject_class->path_string_separator = "*";
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}
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static void
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gst_pad_template_init (GstPadTemplate * templ)
0
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{
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  /* FIXME 0.11: Does anybody remember why this is here? If not, let's
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   * change it for 0.11 and let gst_element_class_add_pad_template() for
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   * example ref/sink the pad templates.
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   */
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  /* We ensure that the pad template we're creating has a sunken reference.
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   * Inconsistencies in pad templates being floating or sunken has caused
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   * problems in the past with leaks, etc.
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   *
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   * For consistency, then, we only produce them  with sunken references
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   * owned by the creator of the object
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   */
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  if (GST_OBJECT_IS_FLOATING (templ)) {
29
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    gst_object_ref_sink (templ);
0
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  }
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}
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   237
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static void
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gst_pad_template_dispose (GObject * object)
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{
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  GstPadTemplate *templ = GST_PAD_TEMPLATE (object);
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  g_free (GST_PAD_TEMPLATE_NAME_TEMPLATE (templ));
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  if (GST_PAD_TEMPLATE_CAPS (templ)) {
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    gst_caps_unref (GST_PAD_TEMPLATE_CAPS (templ));
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  }
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  G_OBJECT_CLASS (parent_class)->dispose (object);
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}
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/* ALWAYS padtemplates cannot have conversion specifications (like src_%d),
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 * since it doesn't make sense.
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 * SOMETIMES padtemplates can do whatever they want, they are provided by the
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 * element.
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 * REQUEST padtemplates can be reverse-parsed (the user asks for 'sink1', the
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 * 'sink%d' template is automatically selected), so we need to restrict their
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   257
 * naming.
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 */
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   259
static gboolean
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name_is_valid (const gchar * name, GstPadPresence presence)
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{
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  const gchar *str;
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  if (presence == GST_PAD_ALWAYS) {
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    if (strchr (name, '%')) {
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      g_warning ("invalid name template %s: conversion specifications are not"
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          " allowed for GST_PAD_ALWAYS padtemplates", name);
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      return FALSE;
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    }
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  } else if (presence == GST_PAD_REQUEST) {
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    if ((str = strchr (name, '%')) && strchr (str + 1, '%')) {
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      g_warning ("invalid name template %s: only one conversion specification"
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          " allowed in GST_PAD_REQUEST padtemplate", name);
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      return FALSE;
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    }
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    if (str && (*(str + 1) != 's' && *(str + 1) != 'd' && *(str + 1) != 'u')) {
0
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      g_warning ("invalid name template %s: conversion specification must be of"
29
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          " type '%%d', '%%u' or '%%s' for GST_PAD_REQUEST padtemplate", name);
0
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      return FALSE;
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    }
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   281
    if (str && (*(str + 2) != '\0')) {
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      g_warning ("invalid name template %s: conversion specification must"
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          " appear at the end of the GST_PAD_REQUEST padtemplate name", name);
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   284
      return FALSE;
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    }
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  }
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  return TRUE;
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}
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#ifdef __SYMBIAN32__
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EXPORT_C
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#endif
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   293
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   294
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GType
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gst_static_pad_template_get_type (void)
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{
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  static GType staticpadtemplate_type = 0;
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   299
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  if (G_UNLIKELY (staticpadtemplate_type == 0)) {
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    staticpadtemplate_type =
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        g_pointer_type_register_static ("GstStaticPadTemplate");
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  }
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  return staticpadtemplate_type;
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}
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   306
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/**
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 * gst_static_pad_template_get:
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 * @pad_template: the static pad template
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 *
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 * Converts a #GstStaticPadTemplate into a #GstPadTemplate.
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   312
 *
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 * Returns: a new #GstPadTemplate.
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   314
 */
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   315
#ifdef __SYMBIAN32__
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   316
EXPORT_C
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   317
#endif
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   318
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   319
GstPadTemplate *
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gst_static_pad_template_get (GstStaticPadTemplate * pad_template)
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   321
{
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   322
  GstPadTemplate *new;
29
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   323
  GstCaps *caps;
0
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diff changeset
   324
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   325
  if (!name_is_valid (pad_template->name_template, pad_template->presence))
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   326
    return NULL;
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   327
29
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   328
  caps = gst_static_caps_get (&pad_template->static_caps);
0
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diff changeset
   329
29
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diff changeset
   330
  new = g_object_new (gst_pad_template_get_type (),
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diff changeset
   331
      "name", pad_template->name_template,
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diff changeset
   332
      "name-template", pad_template->name_template,
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diff changeset
   333
      "direction", pad_template->direction,
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diff changeset
   334
      "presence", pad_template->presence, "caps", caps, NULL);
0
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parents:
diff changeset
   335
29
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parents: 0
diff changeset
   336
  gst_caps_unref (caps);
0
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parents:
diff changeset
   337
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parents:
diff changeset
   338
  return new;
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parents:
diff changeset
   339
}
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parents:
diff changeset
   340
0e761a78d257 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   341
/**
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parents:
diff changeset
   342
 * gst_pad_template_new:
0e761a78d257 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   343
 * @name_template: the name template.
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   344
 * @direction: the #GstPadDirection of the template.
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   345
 * @presence: the #GstPadPresence of the pad.
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   346
 * @caps: a #GstCaps set for the template. The caps are taken ownership of.
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   347
 *
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   348
 * Creates a new pad template with a name according to the given template
0e761a78d257 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   349
 * and with the given arguments. This functions takes ownership of the provided
0e761a78d257 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   350
 * caps, so be sure to not use them afterwards.
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   351
 *
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   352
 * Returns: a new #GstPadTemplate.
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   353
 */
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   354
#ifdef __SYMBIAN32__
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   355
EXPORT_C
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   356
#endif
0e761a78d257 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   357
GstPadTemplate *
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   358
gst_pad_template_new (const gchar * name_template,
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   359
    GstPadDirection direction, GstPadPresence presence, GstCaps * caps)
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   360
{
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   361
  GstPadTemplate *new;
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   362
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   363
  g_return_val_if_fail (name_template != NULL, NULL);
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   364
  g_return_val_if_fail (caps != NULL, NULL);
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   365
  g_return_val_if_fail (direction == GST_PAD_SRC
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   366
      || direction == GST_PAD_SINK, NULL);
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   367
  g_return_val_if_fail (presence == GST_PAD_ALWAYS
0e761a78d257 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   368
      || presence == GST_PAD_SOMETIMES || presence == GST_PAD_REQUEST, NULL);
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   369
0e761a78d257 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   370
  if (!name_is_valid (name_template, presence)) {
0e761a78d257 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   371
    gst_caps_unref (caps);
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   372
    return NULL;
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parents:
diff changeset
   373
  }
0e761a78d257 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   374
0e761a78d257 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   375
  new = g_object_new (gst_pad_template_get_type (),
29
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parents: 0
diff changeset
   376
      "name", name_template, "name-template", name_template,
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parents: 0
diff changeset
   377
      "direction", direction, "presence", presence, "caps", caps, NULL);
0
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parents:
diff changeset
   378
29
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parents: 0
diff changeset
   379
  if (caps)
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   380
    gst_caps_unref (caps);
0
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   381
0e761a78d257 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   382
  return new;
0e761a78d257 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   383
}
0e761a78d257 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   384
0e761a78d257 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   385
/**
0e761a78d257 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   386
 * gst_static_pad_template_get_caps:
0e761a78d257 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   387
 * @templ: a #GstStaticPadTemplate to get capabilities of.
0e761a78d257 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   388
 *
0e761a78d257 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   389
 * Gets the capabilities of the static pad template.
0e761a78d257 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   390
 *
29
567bb019e3e3 Revision: 201010
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   391
 * Returns: the #GstCaps of the static pad template.
567bb019e3e3 Revision: 201010
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   392
 * Unref after usage. Since the core holds an additional
567bb019e3e3 Revision: 201010
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   393
 * ref to the returned caps, use gst_caps_make_writable()
567bb019e3e3 Revision: 201010
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   394
 * on the returned caps to modify it.
0
0e761a78d257 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   395
 */
0e761a78d257 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   396
#ifdef __SYMBIAN32__
0e761a78d257 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   397
EXPORT_C
0e761a78d257 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   398
#endif
0e761a78d257 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   399
0e761a78d257 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   400
GstCaps *
0e761a78d257 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   401
gst_static_pad_template_get_caps (GstStaticPadTemplate * templ)
0e761a78d257 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   402
{
0e761a78d257 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   403
  g_return_val_if_fail (templ, NULL);
0e761a78d257 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   404
0e761a78d257 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   405
  return (GstCaps *) gst_static_caps_get (&templ->static_caps);
0e761a78d257 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   406
}
0e761a78d257 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   407
0e761a78d257 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   408
/**
0e761a78d257 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   409
 * gst_pad_template_get_caps:
0e761a78d257 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   410
 * @templ: a #GstPadTemplate to get capabilities of.
0e761a78d257 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   411
 *
0e761a78d257 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   412
 * Gets the capabilities of the pad template.
0e761a78d257 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   413
 *
0e761a78d257 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   414
 * Returns: the #GstCaps of the pad template. If you need to keep a reference to
0e761a78d257 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   415
 * the caps, take a ref (see gst_caps_ref ()).
0e761a78d257 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   416
 */
0e761a78d257 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   417
#ifdef __SYMBIAN32__
0e761a78d257 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   418
EXPORT_C
0e761a78d257 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   419
#endif
0e761a78d257 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   420
0e761a78d257 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   421
GstCaps *
0e761a78d257 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   422
gst_pad_template_get_caps (GstPadTemplate * templ)
0e761a78d257 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   423
{
0e761a78d257 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   424
  g_return_val_if_fail (GST_IS_PAD_TEMPLATE (templ), NULL);
0e761a78d257 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   425
0e761a78d257 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   426
  return GST_PAD_TEMPLATE_CAPS (templ);
0e761a78d257 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   427
}
0e761a78d257 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   428
0e761a78d257 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   429
/**
0e761a78d257 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   430
 * gst_pad_template_pad_created:
0e761a78d257 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   431
 * @templ: a #GstPadTemplate that has been created
0e761a78d257 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   432
 * @pad:   the #GstPad that created it
0e761a78d257 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   433
 *
0e761a78d257 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   434
 * Emit the pad-created signal for this template when created by this pad.
0e761a78d257 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   435
 */
0e761a78d257 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   436
#ifdef __SYMBIAN32__
0e761a78d257 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   437
EXPORT_C
0e761a78d257 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   438
#endif
0e761a78d257 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   439
0e761a78d257 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   440
void
0e761a78d257 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   441
gst_pad_template_pad_created (GstPadTemplate * templ, GstPad * pad)
0e761a78d257 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   442
{
0e761a78d257 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   443
  g_signal_emit (G_OBJECT (templ),
0e761a78d257 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   444
      gst_pad_template_signals[TEMPL_PAD_CREATED], 0, pad);
0e761a78d257 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   445
}
29
567bb019e3e3 Revision: 201010
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   446
567bb019e3e3 Revision: 201010
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   447
static void
567bb019e3e3 Revision: 201010
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   448
gst_pad_template_set_property (GObject * object, guint prop_id,
567bb019e3e3 Revision: 201010
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   449
    const GValue * value, GParamSpec * pspec)
567bb019e3e3 Revision: 201010
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   450
{
567bb019e3e3 Revision: 201010
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   451
  /* these properties are all construct-only */
567bb019e3e3 Revision: 201010
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   452
  switch (prop_id) {
567bb019e3e3 Revision: 201010
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   453
    case PROP_NAME_TEMPLATE:
567bb019e3e3 Revision: 201010
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   454
      GST_PAD_TEMPLATE_NAME_TEMPLATE (object) = g_value_dup_string (value);
567bb019e3e3 Revision: 201010
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   455
      break;
567bb019e3e3 Revision: 201010
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   456
    case PROP_DIRECTION:
567bb019e3e3 Revision: 201010
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   457
      GST_PAD_TEMPLATE_DIRECTION (object) = g_value_get_enum (value);
567bb019e3e3 Revision: 201010
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   458
      break;
567bb019e3e3 Revision: 201010
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   459
    case PROP_PRESENCE:
567bb019e3e3 Revision: 201010
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   460
      GST_PAD_TEMPLATE_PRESENCE (object) = g_value_get_enum (value);
567bb019e3e3 Revision: 201010
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   461
      break;
567bb019e3e3 Revision: 201010
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   462
    case PROP_CAPS:
567bb019e3e3 Revision: 201010
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   463
      /* allow caps == NULL for backwards compatibility (ie. g_object_new()
567bb019e3e3 Revision: 201010
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   464
       * called without any of the new properties) (FIXME 0.11) */
567bb019e3e3 Revision: 201010
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   465
      if (g_value_get_boxed (value) != NULL) {
567bb019e3e3 Revision: 201010
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   466
        GST_PAD_TEMPLATE_CAPS (object) =
567bb019e3e3 Revision: 201010
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   467
            gst_caps_copy (g_value_get_boxed (value));
567bb019e3e3 Revision: 201010
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   468
      }
567bb019e3e3 Revision: 201010
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   469
      break;
567bb019e3e3 Revision: 201010
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   470
    default:
567bb019e3e3 Revision: 201010
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   471
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
567bb019e3e3 Revision: 201010
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   472
      break;
567bb019e3e3 Revision: 201010
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   473
  }
567bb019e3e3 Revision: 201010
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   474
}
567bb019e3e3 Revision: 201010
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   475
567bb019e3e3 Revision: 201010
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   476
static void
567bb019e3e3 Revision: 201010
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   477
gst_pad_template_get_property (GObject * object, guint prop_id, GValue * value,
567bb019e3e3 Revision: 201010
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   478
    GParamSpec * pspec)
567bb019e3e3 Revision: 201010
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   479
{
567bb019e3e3 Revision: 201010
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   480
  /* these properties are all construct-only */
567bb019e3e3 Revision: 201010
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   481
  switch (prop_id) {
567bb019e3e3 Revision: 201010
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   482
    case PROP_NAME_TEMPLATE:
567bb019e3e3 Revision: 201010
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   483
      g_value_set_string (value, GST_PAD_TEMPLATE_NAME_TEMPLATE (object));
567bb019e3e3 Revision: 201010
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   484
      break;
567bb019e3e3 Revision: 201010
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   485
    case PROP_DIRECTION:
567bb019e3e3 Revision: 201010
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   486
      g_value_set_enum (value, GST_PAD_TEMPLATE_DIRECTION (object));
567bb019e3e3 Revision: 201010
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   487
      break;
567bb019e3e3 Revision: 201010
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   488
    case PROP_PRESENCE:
567bb019e3e3 Revision: 201010
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   489
      g_value_set_enum (value, GST_PAD_TEMPLATE_PRESENCE (object));
567bb019e3e3 Revision: 201010
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   490
      break;
567bb019e3e3 Revision: 201010
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   491
    case PROP_CAPS:
567bb019e3e3 Revision: 201010
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   492
      g_value_set_boxed (value, GST_PAD_TEMPLATE_CAPS (object));
567bb019e3e3 Revision: 201010
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   493
      break;
567bb019e3e3 Revision: 201010
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   494
    default:
567bb019e3e3 Revision: 201010
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   495
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
567bb019e3e3 Revision: 201010
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   496
      break;
567bb019e3e3 Revision: 201010
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   497
  }
567bb019e3e3 Revision: 201010
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   498
}