gstpropertyprobe

gstpropertyprobe

Synopsis


#include <gst/interfaces/propertyprobe.h>

                    GstPropertyProbe;
                    GstPropertyProbeInterface;
const GList*        gst_property_probe_get_properties   (GstPropertyProbe *probe);
const GParamSpec*   gst_property_probe_get_property     (GstPropertyProbe *probe,
                                                         const gchar *name);
GValueArray*        gst_property_probe_get_values       (GstPropertyProbe *probe,
                                                         const GParamSpec *pspec);
GValueArray*        gst_property_probe_get_values_name  (GstPropertyProbe *probe,
                                                         const gchar *name);
gboolean            gst_property_probe_needs_probe      (GstPropertyProbe *probe,
                                                         const GParamSpec *pspec);
gboolean            gst_property_probe_needs_probe_name (GstPropertyProbe *probe,
                                                         const gchar *name);
GValueArray*        gst_property_probe_probe_and_get_values
                                                        (GstPropertyProbe *probe,
                                                         const GParamSpec *pspec);
GValueArray*        gst_property_probe_probe_and_get_values_name
                                                        (GstPropertyProbe *probe,
                                                         const gchar *name);
void                gst_property_probe_probe_property   (GstPropertyProbe *probe,
                                                         const GParamSpec *pspec);
void                gst_property_probe_probe_property_name
                                                        (GstPropertyProbe *probe,
                                                         const gchar *name);

Object Hierarchy

  GInterface
   +----GstPropertyProbe

Signals

  "probe-needed"                                   : Run Last

Description

Details

GstPropertyProbe

typedef struct _GstPropertyProbe GstPropertyProbe;


GstPropertyProbeInterface

typedef struct {
  GTypeInterface klass;

  /* signals */
  void          (*probe_needed)   (GstPropertyProbe *probe,
                                   const GParamSpec *pspec);

  /* virtual functions */
  const GList * (*get_properties) (GstPropertyProbe *probe);
  gboolean      (*needs_probe)    (GstPropertyProbe *probe,
                                   guint             prop_id,
                                   const GParamSpec *pspec);
  void          (*probe_property) (GstPropertyProbe *probe,
                                   guint             prop_id,
                                   const GParamSpec *pspec);
  GValueArray * (*get_values)     (GstPropertyProbe *probe,
                                   guint             prop_id,
                                   const GParamSpec *pspec);

  gpointer _gst_reserved[GST_PADDING];
} GstPropertyProbeInterface;


gst_property_probe_get_properties ()

const GList*        gst_property_probe_get_properties   (GstPropertyProbe *probe);

Get a list of properties for which probing is supported.

probe :

the GstPropertyProbe to get the properties for.

Returns :

the list of properties for which probing is supported by this element.

gst_property_probe_get_property ()

const GParamSpec*   gst_property_probe_get_property     (GstPropertyProbe *probe,
                                                         const gchar *name);

probe :

name :

Returns :


gst_property_probe_get_values ()

GValueArray*        gst_property_probe_get_values       (GstPropertyProbe *probe,
                                                         const GParamSpec *pspec);

Gets the possible (probed) values for the given property, requires the property to have been probed before.

probe :

the GstPropertyProbe object.

pspec :

the GParamSpec property identifier.

Returns :

A list of valid values for the given property.

gst_property_probe_get_values_name ()

GValueArray*        gst_property_probe_get_values_name  (GstPropertyProbe *probe,
                                                         const gchar *name);

Same as gst_property_probe_get_values().

probe :

the GstPropertyProbe object.

name :

the name of the property to get values for.

Returns :

A list of valid values for the given property.

gst_property_probe_needs_probe ()

gboolean            gst_property_probe_needs_probe      (GstPropertyProbe *probe,
                                                         const GParamSpec *pspec);

Checks whether a property needs a probe. This might be because the property wasn't initialized before, or because host setup changed. This might be, for example, because a new device was added, and thus device probing needs to be refreshed to display the new device.

probe :

the GstPropertyProbe object to which the given property belongs.

pspec :

a GParamSpec that identifies the property to check.

Returns :

TRUE if the property needs a new probe, FALSE if not.

gst_property_probe_needs_probe_name ()

gboolean            gst_property_probe_needs_probe_name (GstPropertyProbe *probe,
                                                         const gchar *name);

Same as gst_property_probe_needs_probe().

probe :

the GstPropertyProbe object to which the given property belongs.

name :

the name of the property to check.

Returns :

TRUE if the property needs a new probe, FALSE if not.

gst_property_probe_probe_and_get_values ()

GValueArray*        gst_property_probe_probe_and_get_values
                                                        (GstPropertyProbe *probe,
                                                         const GParamSpec *pspec);

Check whether the given property requires a new probe. If so, fo the probe. After that, retrieve a value list. Meant as a utility function that wraps the above functions.

probe :

the GstPropertyProbe object.

pspec :

The GParamSpec property identifier.

Returns :

the list of valid values for this property.

gst_property_probe_probe_and_get_values_name ()

GValueArray*        gst_property_probe_probe_and_get_values_name
                                                        (GstPropertyProbe *probe,
                                                         const gchar *name);

Same as gst_property_probe_probe_and_get_values().

probe :

the GstPropertyProbe object.

name :

the name of the property to get values for.

Returns :

the list of valid values for this property.

gst_property_probe_probe_property ()

void                gst_property_probe_probe_property   (GstPropertyProbe *probe,
                                                         const GParamSpec *pspec);

probe :

pspec :


gst_property_probe_probe_property_name ()

void                gst_property_probe_probe_property_name
                                                        (GstPropertyProbe *probe,
                                                         const gchar *name);

Runs a probe on the given property.

probe :

the GstPropertyProbe to check.

name :

name of the property to return.

Signal Details

The "probe-needed" signal

void                user_function                      (GstPropertyProbe *gstpropertyprobe,
                                                        gpointer          arg1,
                                                        gpointer          user_data)             : Run Last

gstpropertyprobe :

the object which received the signal.

arg1 :

user_data :

user data set when the signal handler was connected.