GstDParam

GstDParam — dynamic parameter instance

Synopsis


#include <libs/control/control.h>


                    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

Signals


  "value-changed"                                  : Run Last

Description

Details

GstDParam

typedef struct _GstDParam 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

Property Details

The "value-double" property

  "value-double"             gdouble               : Read / Write

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

Default value: 0


The "value-float" property

  "value-float"              gfloat                : Read / Write

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

Default value: 0


The "value-int" property

  "value-int"                gint                  : Read / Write

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

Default value: 0


The "value-int64" property

  "value-int64"              gint64                : Read / Write

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

Default value: 0

Signal Details

The "value-changed" signal

void                user_function                      (GstDParam *gstdparam,
                                                        gpointer   user_data)      : Run Last

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