/**
   * Sets the simulcast layers for this receiver and fires an event about it.
   *
   * @param simulcastLayers the simulcast layers for this receiver.
   */
  public void setSimulcastLayers(SimulcastLayer[] simulcastLayers) {
    this.simulcastLayers = simulcastLayers;

    if (logger.isInfoEnabled()) {
      if (simulcastLayers == null) {
        logInfo("Simulcast disabled.");
      } else {
        for (SimulcastLayer l : simulcastLayers) {
          logInfo(l.getOrder() + ": " + l.getPrimarySSRC());
        }
      }
    }

    executorService.execute(
        new Runnable() {
          public void run() {
            firePropertyChange(SIMULCAST_LAYERS_PNAME, null, null);
          }
        });

    // TODO If simulcastLayers has changed, then simulcastLayerFrameHistory
    // has very likely become irrelevant. In other words, clear
    // simulcastLayerFrameHistory.
  }
 private void logInfo(String msg) {
   if (logger.isInfoEnabled()) {
     msg = getSimulcastEngine().getVideoChannel().getEndpoint().getID() + ": " + msg;
     logger.info(msg);
   }
 }