rem: return FALSE;
add: switch (type) { case MEDIA_DVD: return FALSE; case MEDIA_VCD: return FALSE; case MEDIA_CDDA: return FALSE; default: return FALSE; }
context: bacon_video_widget_can_play (BaconVideoWidget * bvw, MediaType type){  g_return_val_if_fail (bvw != NULL, FALSE);  g_return_val_if_fail (BACON_IS_VIDEO_WIDGET (bvw), FALSE);  g_return_val_if_fail (GST_IS_PLAY (bvw->priv->play), FALSE);  return FALSE;}