C++ (Cpp) gst_control_binding_get_value_array Examples

Example #1

File: gstglvideomixer.c Project: ndufresne/gst-plugins-bad

static gboolean
gst_gl_mixer_control_binding_proxy_get_value_array (GstControlBinding * binding,
    GstClockTime timestamp, GstClockTime interval, guint n_values,
    gpointer values)
{
  GstGLMixerControlBindingProxy *self = (GstGLMixerControlBindingProxy *)
      binding;
  GstControlBinding *ref_binding;
  gboolean ret = FALSE;

  ref_binding = gst_object_get_control_binding (self->ref_object,
      self->property_name);

  if (ref_binding) {
    ret = gst_control_binding_get_value_array (ref_binding, timestamp,
        interval, n_values, values);
    gst_object_unref (ref_binding);
  }

  return ret;
}

Example #2

File: gstcontrolbinding.c Project: lubing521/gst-embedded-builder

/**
 * gst_control_binding_get_g_value_array:
 * @binding: the control binding
 * @timestamp: the time that should be processed
 * @interval: the time spacing between subsequent values
 * @n_values: the number of values
 * @values: array to put control-values in
 *
 * 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.
 *
 * Returns: %TRUE if the given array could be filled, %FALSE otherwise
 */
gboolean
gst_control_binding_get_g_value_array (GstControlBinding * binding,
    GstClockTime timestamp, GstClockTime interval, guint n_values,
    GValue * values)
{
  GstControlBindingClass *klass;
  gboolean ret = FALSE;

  g_return_val_if_fail (GST_IS_CONTROL_BINDING (binding), FALSE);
  g_return_val_if_fail (GST_CLOCK_TIME_IS_VALID (timestamp), FALSE);
  g_return_val_if_fail (GST_CLOCK_TIME_IS_VALID (interval), FALSE);
  g_return_val_if_fail (values, FALSE);

  klass = GST_CONTROL_BINDING_GET_CLASS (binding);

  if (G_LIKELY (klass->get_g_value_array != NULL)) {
    ret =
        klass->get_g_value_array (binding, timestamp, interval, n_values,
        values);
  } else {
    guint i;
    GType type, base;

    base = type = G_PARAM_SPEC_VALUE_TYPE (GST_CONTROL_BINDING_PSPEC (binding));
    while ((type = g_type_parent (type)))
      base = type;

    GST_INFO_OBJECT (binding, "missing get_g_value_array implementation, we're "
        "emulating it");
    switch (base) {
      case G_TYPE_INT:
        CONVERT_ARRAY (int, INT);
        break;
      case G_TYPE_UINT:
        CONVERT_ARRAY (uint, UINT);
        break;
      case G_TYPE_LONG:
        CONVERT_ARRAY (long, LONG);
        break;
      case G_TYPE_ULONG:
        CONVERT_ARRAY (ulong, ULONG);
        break;
      case G_TYPE_INT64:
        CONVERT_ARRAY (int64, INT64);
        break;
      case G_TYPE_UINT64:
        CONVERT_ARRAY (uint64, UINT64);
        break;
      case G_TYPE_FLOAT:
        CONVERT_ARRAY (float, FLOAT);
        break;
      case G_TYPE_DOUBLE:
        CONVERT_ARRAY (double, DOUBLE);
        break;
      case G_TYPE_BOOLEAN:
        CONVERT_ARRAY (boolean, BOOLEAN);
        break;
      case G_TYPE_ENUM:
      {
        gint *v = g_new (gint, n_values);
        ret = gst_control_binding_get_value_array (binding, timestamp, interval,
            n_values, v);
        if (ret) {
          for (i = 0; i < n_values; i++) {
            g_value_init (&values[i], type);
            g_value_set_enum (&values[i], v[i]);
          }
        }
        g_free (v);
      }
        break;
      default:
        GST_WARNING ("incomplete implementation for paramspec type '%s'",
            G_PARAM_SPEC_TYPE_NAME (GST_CONTROL_BINDING_PSPEC (binding)));
        GST_CONTROL_BINDING_PSPEC (binding) = NULL;
        break;
    }
  }
  return ret;
}