/* ----------------------------------------------------------------------------
 *         ATMEL Microcontroller Software Support 
 * ----------------------------------------------------------------------------
 * Copyright (c) 2008, Atmel Corporation
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * - Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the disclaimer below.
 *
 * Atmel's name may not be used to endorse or promote products derived from
 * this software without specific prior written permission.
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 * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
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 */

/** \file
 *
 * This file implements functions for USB AUDIO class feature unit requests.
 */

/** \addtogroup usb_audio
 *@{
 */

/*----------------------------------------------------------------------------
 *         Headers
 *----------------------------------------------------------------------------*/

#include "AUDRequests.h"

/*----------------------------------------------------------------------------
 *         Exported functions
 *----------------------------------------------------------------------------*/

/**
 *  Returns the control selector value indicating the target of a Feature Unit
 *  request.
 *  \param request  Pointer to a USBGenericRequest instance.
 *  \sa usb_audio_ctrl_sel USB Audio Control selector values
 */
uint8_t AUDFeatureUnitRequest_GetControl(const USBGenericRequest *request)
{
    return ((USBGenericRequest_GetValue(request) >> 8) & 0xFF);
}

/**
 *  Returns the channel number of a Feature unit which should be altered by the
 *  given request.
 *  \param request  Pointer to a USBGenericRequest instance.
 */
uint8_t AUDFeatureUnitRequest_GetChannel(const USBGenericRequest *request)
{
    return (USBGenericRequest_GetValue(request) & 0xFF);
}

/**@}*/