audfeatureunitrequest.h

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/* ----------------------------------------------------------------------------
 *         ATMEL Microcontroller Software Support 
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 * Copyright (c) 2008, Atmel Corporation
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//------------------------------------------------------------------------------
/// \unit
///
/// !!!Purpose
///
/// Definitions of constants and methods for using USB %audio requests
/// targetted at a Feature unit.
///
/// !!!Usage
///
/// - For a USB %device:
///     -# Use AUDFeatureUnitRequest_GetControl to determine which control
///        shall be tweaked following a host request.
//      -# Use AUDFeatureUnitRequest_GetChannel to identify the channel which
//         will have its control altered.
//------------------------------------------------------------------------------

#ifndef AUDFEATUREUNITREQUEST_H
#define AUDFEATUREUNITREQUEST_H

//------------------------------------------------------------------------------
//         Headers
//------------------------------------------------------------------------------

#include <usb/common/core/USBGenericRequest.h>

//------------------------------------------------------------------------------
//         Constants
//------------------------------------------------------------------------------

//------------------------------------------------------------------------------
/// \page "USB Audio Control selector values"
///
/// This page lists the available control selectors for a Feature Unit request.
/// 
/// !Controls
/// - AUDFeatureUnitRequest_MUTE

/// Mute control selector.
#define AUDFeatureUnitRequest_MUTE              0x01
//------------------------------------------------------------------------------

//------------------------------------------------------------------------------
//         Exported functions
//------------------------------------------------------------------------------
extern unsigned char AUDFeatureUnitRequest_GetControl(
    const USBGenericRequest *request);
extern unsigned char AUDFeatureUnitRequest_GetChannel(
    const USBGenericRequest *request);

#endif //#ifndef AUDFEATUREUNITREQUEST_H