/******************************************************************************
 * Copyright 2020 The Apollo Authors. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *****************************************************************************/

syntax = "proto2";

package apollo.audio;

enum MovingResult {
  UNKNOWN = 0;
  APPROACHING = 1;
  DEPARTING = 2;
  STATIONARY = 3;
}

enum AudioType {
  UNKNOWN_TYPE = 0;
  POLICE = 1;
  AMBULANCE = 2;
  FIRETRUCK = 3;
}

enum AudioDirection {
  UNKNOWN_DIRECTION = 0;
  FRONT = 1;
  LEFT = 2;
  BACK = 3;
  RIGHT = 4;
}