GstPadTemplate

GstPadTemplate —

Synopsis


#include <gst/gst.h>


            GstStaticPadTemplate;
#define     GST_STATIC_PAD_TEMPLATE         (padname, dir, pres, caps)
GstPadTemplate* gst_static_pad_template_get (GstStaticPadTemplate *pad_template);
GstCaps*    gst_static_pad_template_get_caps
                                            (GstStaticPadTemplate *templ);
            GstPadTemplate;
enum        GstPadTemplateFlags;
enum        GstPadPresence;
#define     GST_PAD_TEMPLATE_NAME_TEMPLATE  (templ)
#define     GST_PAD_TEMPLATE_DIRECTION      (templ)
#define     GST_PAD_TEMPLATE_PRESENCE       (templ)
#define     GST_PAD_TEMPLATE_CAPS           (templ)
#define     GST_PAD_TEMPLATE_IS_FIXED       (templ)
GstPadTemplate* gst_pad_template_new        (const gchar *name_template,
                                             GstPadDirection direction,
                                             GstPadPresence presence,
                                             GstCaps *caps);
GstCaps*    gst_pad_template_get_caps       (GstPadTemplate *templ);

Object Hierarchy


  GObject
   +----GstObject
         +----GstPadTemplate

Signal Prototypes


"pad-created"
            void        user_function      (GstPadTemplate *pad_template,
                                            GstPad *pad,
                                            gpointer user_data);

Description

Details

GstStaticPadTemplate

typedef struct {
  gchar           *name_template;
  GstPadDirection  direction;
  GstPadPresence   presence;
  GstStaticCaps   static_caps;
} GstStaticPadTemplate;

Structure describing the GstStaticPadTemplate.

gchar *`name_template`;	the name of the template
GstPadDirection `direction`;	the direction of the template
GstPadPresence `presence`;	the presence of the template
GstStaticCaps `static_caps`;	the caps of the template.

GST_STATIC_PAD_TEMPLATE()

#define     GST_STATIC_PAD_TEMPLATE(padname, dir, pres, caps)

Convenience macro to fill the values of a GstStaticPadTemplate structure.

`padname` :	the name template of pad
`dir` :	the GstPadDirection of the pad
`pres` :	the GstPadPresence of the pad
`caps` :	the GstStaticCaps of the pad

gst_static_pad_template_get ()

GstPadTemplate* gst_static_pad_template_get (GstStaticPadTemplate *pad_template);

Converts a GstStaticPadTemplate into a GstPadTemplate.

`pad_template` :	the static pad template
Returns :	a new GstPadTemplate.

gst_static_pad_template_get_caps ()

GstCaps*    gst_static_pad_template_get_caps
                                            (GstStaticPadTemplate *templ);

Gets the capabilities of the static pad template.

`templ` :	a GstStaticPadTemplate to get capabilities of.
Returns :	the GstCaps of the static pad template. If you need to keep a reference to the caps, take a ref (see `gst_caps_ref()`).

GstPadTemplate

typedef struct _GstPadTemplate GstPadTemplate;

The padtemplate object.

enum GstPadTemplateFlags

typedef enum {
  GST_PAD_TEMPLATE_FIXED        = (GST_OBJECT_FLAG_LAST << 0),
  /* padding */
  GST_PAD_TEMPLATE_FLAG_LAST    = (GST_OBJECT_FLAG_LAST << 4)
} GstPadTemplateFlags;

Flags for the padtemplate

`GST_PAD_TEMPLATE_FIXED`	the padtemplate has no variable properties
`GST_PAD_TEMPLATE_FLAG_LAST`	first flag that can be used by subclasses.

enum GstPadPresence

typedef enum {
  GST_PAD_ALWAYS,
  GST_PAD_SOMETIMES,
  GST_PAD_REQUEST
} GstPadPresence;

Indicates when this pad will become available.

`GST_PAD_ALWAYS`	the pad is always available
`GST_PAD_SOMETIMES`	the pad will become available depending on the media stream
`GST_PAD_REQUEST`	the pad is only available on request with `gst_element_request_pad_by_name()` or `gst_element_request_compatible_pad()`.