text: /**
   * @file usbd_audio.h
   * @brief
   *
   * Copyright (c) 2022 sakumisu
   *
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.  The
   * ASF licenses this file to you 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.
   *
   */
  #ifndef _USBD_AUDIO_H_
  #define _USBD_AUDIO_H_
  
  #include "usb_audio.h"
  
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  struct usbd_audio_control_info {
      uint16_t vol_min;
      uint16_t vol_max;
      uint16_t vol_res;
      uint16_t vol_current;
      uint8_t mute;
  };
  
  void usbd_audio_add_interface(usbd_class_t *class, usbd_interface_t *intf);
  void usbd_audio_set_interface_callback(uint8_t value);
  void usbd_audio_set_volume(uint8_t vol);
  #ifdef __cplusplus
  }
  #endif
  
  #endif /* _USB_AUDIO_H_ */
  