author | hgs |
Fri, 14 May 2010 18:43:44 -0500 | |
changeset 20 | 7e3786c5ed27 |
parent 0 | 0e761a78d257 |
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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 <wim.taymans@chello.be> |
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* |
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* gstpadtemplate.h: Header for GstPadTemplate object |
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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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#ifndef __GST_PAD_TEMPLATE_H__ |
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#define __GST_PAD_TEMPLATE_H__ |
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#include <gst/gstconfig.h> |
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#include <gst/gstobject.h> |
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#include <gst/gstbuffer.h> |
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#include <gst/gstcaps.h> |
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#include <gst/gstevent.h> |
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#include <gst/gstquery.h> |
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#include <gst/gsttask.h> |
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G_BEGIN_DECLS |
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/* FIXME: this awful circular dependency need to be resolved properly (see pad.h) */ |
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/*typedef struct _GstPadTemplate GstPadTemplate; */ |
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typedef struct _GstPadTemplateClass GstPadTemplateClass; |
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typedef struct _GstStaticPadTemplate GstStaticPadTemplate; |
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#define GST_TYPE_STATIC_PAD_TEMPLATE (gst_static_pad_template_get_type ()) |
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#define GST_TYPE_PAD_TEMPLATE (gst_pad_template_get_type ()) |
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#define GST_PAD_TEMPLATE(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_PAD_TEMPLATE,GstPadTemplate)) |
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#define GST_PAD_TEMPLATE_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_PAD_TEMPLATE,GstPadTemplateClass)) |
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#define GST_IS_PAD_TEMPLATE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_PAD_TEMPLATE)) |
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#define GST_IS_PAD_TEMPLATE_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_PAD_TEMPLATE)) |
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/** |
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* GstPadPresence: |
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* @GST_PAD_ALWAYS: the pad is always available |
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* @GST_PAD_SOMETIMES: the pad will become available depending on the media stream |
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* @GST_PAD_REQUEST: the pad is only available on request with |
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* gst_element_request_pad_by_name() or gst_element_request_compatible_pad(). |
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* |
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* Indicates when this pad will become available. |
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*/ |
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typedef enum { |
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GST_PAD_ALWAYS, |
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GST_PAD_SOMETIMES, |
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GST_PAD_REQUEST |
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} GstPadPresence; |
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/** |
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* GST_PAD_TEMPLATE_NAME_TEMPLATE: |
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* @templ: the template to query |
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* |
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* Get the nametemplate of the padtemplate. |
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*/ |
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#define GST_PAD_TEMPLATE_NAME_TEMPLATE(templ) (((GstPadTemplate *)(templ))->name_template) |
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/** |
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* GST_PAD_TEMPLATE_DIRECTION: |
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* @templ: the template to query |
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* |
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* Get the #GstPadDirection of the padtemplate. |
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*/ |
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#define GST_PAD_TEMPLATE_DIRECTION(templ) (((GstPadTemplate *)(templ))->direction) |
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/** |
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* GST_PAD_TEMPLATE_PRESENCE: |
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* @templ: the template to query |
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* |
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* Get the #GstPadPresence of the padtemplate. |
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*/ |
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#define GST_PAD_TEMPLATE_PRESENCE(templ) (((GstPadTemplate *)(templ))->presence) |
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/** |
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* GST_PAD_TEMPLATE_CAPS: |
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* @templ: the template to query |
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* |
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* Get a handle to the padtemplate #GstCaps |
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*/ |
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#define GST_PAD_TEMPLATE_CAPS(templ) (((GstPadTemplate *)(templ))->caps) |
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/** |
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* GstPadTemplateFlags: |
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* @GST_PAD_TEMPLATE_FIXED: the padtemplate has no variable properties |
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* @GST_PAD_TEMPLATE_FLAG_LAST: first flag that can be used by subclasses. |
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* |
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* Flags for the padtemplate |
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*/ |
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typedef enum { |
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GST_PAD_TEMPLATE_FIXED = (GST_OBJECT_FLAG_LAST << 0), |
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/* padding */ |
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GST_PAD_TEMPLATE_FLAG_LAST = (GST_OBJECT_FLAG_LAST << 4) |
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} GstPadTemplateFlags; |
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|
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/** |
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* GST_PAD_TEMPLATE_IS_FIXED: |
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* @templ: the template to query |
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* |
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* Check if the properties of the padtemplate are fixed |
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*/ |
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#define GST_PAD_TEMPLATE_IS_FIXED(templ) (GST_OBJECT_FLAG_IS_SET(templ, GST_PAD_TEMPLATE_FIXED)) |
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|
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/** |
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* GstPadTemplate: |
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* |
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* The padtemplate object. |
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*/ |
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struct _GstPadTemplate { |
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GstObject object; |
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126 |
|
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gchar *name_template; |
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GstPadDirection direction; |
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GstPadPresence presence; |
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GstCaps *caps; |
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131 |
|
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gpointer _gst_reserved[GST_PADDING]; |
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}; |
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134 |
|
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struct _GstPadTemplateClass { |
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GstObjectClass parent_class; |
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137 |
|
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/* signal callbacks */ |
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void (*pad_created) (GstPadTemplate *templ, GstPad *pad); |
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|
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gpointer _gst_reserved[GST_PADDING]; |
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}; |
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143 |
|
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/** |
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* GstStaticPadTemplate: |
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* @name_template: the name of the template |
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* @direction: the direction of the template |
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* @presence: the presence of the template |
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* @static_caps: the caps of the template. |
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* |
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* Structure describing the #GstStaticPadTemplate. |
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*/ |
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struct _GstStaticPadTemplate { |
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const gchar *name_template; |
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GstPadDirection direction; |
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GstPadPresence presence; |
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GstStaticCaps static_caps; |
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}; |
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|
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/** |
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* GST_STATIC_PAD_TEMPLATE: |
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* @padname: the name template of the pad |
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* @dir: the GstPadDirection of the pad |
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* @pres: the GstPadPresence of the pad |
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* @caps: the GstStaticCaps of the pad |
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* |
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* Convenience macro to fill the values of a GstStaticPadTemplate |
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* structure. |
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*/ |
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#define GST_STATIC_PAD_TEMPLATE(padname, dir, pres, caps) \ |
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{ \ |
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/* name_template */ padname, \ |
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/* direction */ dir, \ |
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/* presence */ pres, \ |
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/* caps */ caps \ |
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} |
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|
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/* templates and factories */ |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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|
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GType gst_pad_template_get_type (void); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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|
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GType gst_static_pad_template_get_type (void); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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|
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|
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GstPadTemplate* gst_pad_template_new (const gchar *name_template, |
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GstPadDirection direction, GstPadPresence presence, |
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GstCaps *caps); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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|
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|
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GstPadTemplate * gst_static_pad_template_get (GstStaticPadTemplate *pad_template); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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|
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GstCaps* gst_static_pad_template_get_caps (GstStaticPadTemplate *templ); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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GstCaps* gst_pad_template_get_caps (GstPadTemplate *templ); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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void gst_pad_template_pad_created (GstPadTemplate * templ, GstPad * pad); |
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G_END_DECLS |
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#endif /* __GST_PAD_TEMPLATE_H__ */ |
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