GstDParam

GstDParam — dynamic parameter instance

Synopsis


#include <libs/control/control.h>


struct      GstDParam;
GstDParam*  gst_dparam_new                  (GType type);
void        gst_dparam_attach               (GstDParam *dparam,
                                             GstDParamManager *manager,
                                             GParamSpec *param_spec,
                                             gchar *unit_name);
void        gst_dparam_detach               (GstDParam *dparam);
void        gst_dparam_do_update_default    (GstDParam *dparam,
                                             gint64 timestamp,
                                             GValue *value,
                                             GstDParamUpdateInfo update_info);


Object Hierarchy


  GObject
   +----GstObject
         +----GstDParam
               +----GstDParamSmooth
               +----GstDParamLinInterp

Properties


  "value-double"         gdouble              : Read / Write
  "value-float"          gfloat               : Read / Write
  "value-int"            gint                 : Read / Write
  "value-int64"          gint64               : Read / Write

Signal Prototypes


"value-changed"
            void        user_function      (GstDParam *gstdparam,
                                            gpointer user_data);

Description

Details

struct GstDParam

struct GstDParam;


gst_dparam_new ()

GstDParam*  gst_dparam_new                  (GType type);

Create a new dynamic parameter controller.

type : the type that this dparam will store
Returns : a new instance of GstDParam

gst_dparam_attach ()

void        gst_dparam_attach               (GstDParam *dparam,
                                             GstDParamManager *manager,
                                             GParamSpec *param_spec,
                                             gchar *unit_name);

Adding the parameter controller to the manager using the supplied specs and unit. See also gst_dpman_attach_dparam().

dparam : GstDParam instance
manager : the GstDParamManager that this dparam belongs to
param_spec : the specification for the parameter
unit_name : the name of the unit

gst_dparam_detach ()

void        gst_dparam_detach               (GstDParam *dparam);

Removes a previousely added parameter controller.

dparam : GstDParam instance

gst_dparam_do_update_default ()

void        gst_dparam_do_update_default    (GstDParam *dparam,
                                             gint64 timestamp,
                                             GValue *value,
                                             GstDParamUpdateInfo update_info);

Default implementation for changing a dynamic parameter. Subclasses might overwrite the behaviour of this.

dparam : the parameter to update
timestamp : when should the update take place
value : the new value
update_info : unused here

Properties

"value-double" (gdouble : Read / Write)

The value that should be changed if gdouble is the type.

"value-float" (gfloat : Read / Write)

The value that should be changed if gfloat is the type.

"value-int" (gint : Read / Write)

The value that should be changed if gint is the type.

"value-int64" (gint64 : Read / Write)

The value that should be changed if gint64 is the type.

Signals

The "value-changed" signal

void        user_function                  (GstDParam *gstdparam,
                                            gpointer user_data);

gstdparam :the object which received the signal.
user_data :user data set when the signal handler was connected.