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09141c6e1f
Since we started depending on GLib 2.44, we can be sure this macro is defined (it will be a no-op on compilers that don't support it). For plugins we should just start using `G_DECLARE_FINAL_TYPE` which means we no longer need the macro there, but for most types in core we don't want to break ABI, which means it's better to just keep it like it is (and use the `#ifdef` instead).
239 lines
6.6 KiB
C
239 lines
6.6 KiB
C
/* 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., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, 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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typedef struct _GstPadTemplate GstPadTemplate;
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typedef struct _GstPadTemplateClass GstPadTemplateClass;
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typedef struct _GstStaticPadTemplate GstStaticPadTemplate;
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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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#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().
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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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* GST_PAD_TEMPLATE_GTYPE:
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* @templ: the template to query
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*
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* Get the #GType of the padtemplate
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*
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* Since: 1.14
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*/
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#define GST_PAD_TEMPLATE_GTYPE(templ) (((GstPadTemplate *)(templ))->ABI.abi.gtype)
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/**
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* GstPadTemplateFlags:
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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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/* 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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* 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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* 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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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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/*< private >*/
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union {
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gpointer _gst_reserved[GST_PADDING];
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struct {
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GType gtype;
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} abi;
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} ABI;
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};
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struct _GstPadTemplateClass {
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GstObjectClass parent_class;
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/* signal callbacks */
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void (*pad_created) (GstPadTemplate *templ, GstPad *pad);
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/*< private >*/
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gpointer _gst_reserved[GST_PADDING];
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};
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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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* 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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* Example:
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* |[<!-- language="C" -->
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* static GstStaticPadTemplate my_src_template = \
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* GST_STATIC_PAD_TEMPLATE("src", GST_PAD_SRC, GST_PAD_ALWAYS,
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* GST_STATIC_CAPS_ANY);
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* ]|
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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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/* templates and factories */
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GST_API
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GType gst_pad_template_get_type (void);
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/**
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* gst_static_pad_template_get_type: (attributes doc.skip=true)
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*/
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GST_API
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GType gst_static_pad_template_get_type (void);
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GST_API
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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) G_GNUC_MALLOC;
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GST_API
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GstPadTemplate* gst_pad_template_new_with_gtype (const gchar *name_template,
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GstPadDirection direction, GstPadPresence presence,
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GstCaps *caps, GType pad_type) G_GNUC_MALLOC;
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GST_API
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GstPadTemplate * gst_static_pad_template_get (GstStaticPadTemplate *pad_template);
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GST_API
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GstPadTemplate * gst_pad_template_new_from_static_pad_template_with_gtype (
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GstStaticPadTemplate * pad_template,
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GType pad_type);
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GST_API
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GstCaps* gst_static_pad_template_get_caps (GstStaticPadTemplate *templ);
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GST_API
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GstCaps* gst_pad_template_get_caps (GstPadTemplate *templ);
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GST_API
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void gst_pad_template_pad_created (GstPadTemplate * templ, GstPad * pad);
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G_DEFINE_AUTOPTR_CLEANUP_FUNC(GstPadTemplate, gst_object_unref)
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G_END_DECLS
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#endif /* __GST_PAD_TEMPLATE_H__ */
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