gst_control_binding_sync_values ()

gboolean
gst_control_binding_sync_values (GstControlBinding *binding,
                                 GstObject *object,
                                 GstClockTime timestamp,
                                 GstClockTime last_sync);

Sets the property of the object , according to the GstControlSources that handle them and for the given timestamp.

If this function fails, it is most likely the application developers fault. Most probably the control sources are not setup correctly.

gst_control_binding_get_value ()

GValue *
gst_control_binding_get_value (GstControlBinding *binding,
                               GstClockTime timestamp);

Gets the value for the given controlled property at the requested time.

gst_control_binding_get_value_array ()

gboolean
gst_control_binding_get_value_array (GstControlBinding *binding,
                                     GstClockTime timestamp,
                                     GstClockTime interval,
                                     guint n_values,
                                     gpointer values);

Gets a number of values for the given controlled property starting at the requested time. The array values need to hold enough space for n_values of the same type as the objects property's type.

This function is useful if one wants to e.g. draw a graph of the control curve or apply a control curve sample by sample.

The values are unboxed and ready to be used. The similar function gst_control_binding_get_g_value_array() returns the array as GValues and is more suitable for bindings.

gst_control_binding_get_g_value_array ()

gboolean
gst_control_binding_get_g_value_array (GstControlBinding *binding,
                                       GstClockTime timestamp,
                                       GstClockTime interval,
                                       guint n_values,
                                       GValue *values);

Gets a number of GValues for the given controlled property starting at the requested time. The array values need to hold enough space for n_values of GValue.

This function is useful if one wants to e.g. draw a graph of the control curve or apply a control curve sample by sample.

gst_control_binding_set_disabled ()

void
gst_control_binding_set_disabled (GstControlBinding *binding,
                                  gboolean disabled);

This function is used to disable a control binding for some time, i.e. gst_object_sync_values() will do nothing.

gst_control_binding_is_disabled ()

gboolean
gst_control_binding_is_disabled (GstControlBinding *binding);

Check if the control binding is disabled.

struct GstControlBinding

struct GstControlBinding {
  gchar *name;
  GParamSpec *pspec;
};

The instance structure of GstControlBinding.

struct GstControlBindingClass

struct GstControlBindingClass {
  GstObjectClass parent_class;

  /* virtual methods */
  gboolean (* sync_values) (GstControlBinding *binding, GstObject *object, GstClockTime timestamp, GstClockTime last_sync);
  GValue * (* get_value) (GstControlBinding *binding, GstClockTime timestamp);
  gboolean (* get_value_array) (GstControlBinding *binding, GstClockTime timestamp,GstClockTime interval, guint n_values, gpointer values);
  gboolean (* get_g_value_array) (GstControlBinding *binding, GstClockTime timestamp,GstClockTime interval, guint n_values, GValue *values);
};

The class structure of GstControlBinding.

The “name” property

  “name”                     gchar *

The name of the property.

Flags: Read / Write / Construct Only

Default value: NULL

The “object” property

  “object”                   GstObject *

The object of the property.

Flags: Read / Write / Construct Only