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/* ----------------------------------------------------------------------------
* 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.
*
* DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
* DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
* ----------------------------------------------------------------------------
*/
//------------------------------------------------------------------------------
/// \unit
///
/// !!!Purpose
///
/// Definition of the USB audio-specific data endpoint descriptor.
///
/// !!!Usage
///
/// -# Declare an AUDDataEndpointDescriptor instance as part of the
/// configuration descriptors of a USB %audio %device.
//------------------------------------------------------------------------------
#ifndef AUDDATAENDPOINTDESCRIPTOR_H
#define AUDDATAENDPOINTDESCRIPTOR_H
//------------------------------------------------------------------------------
// Definitions
//------------------------------------------------------------------------------
/// Descriptor subtype for an Audio data endpoint.
#define AUDDataEndpointDescriptor_SUBTYPE 0x01
//------------------------------------------------------------------------------
/// \page "USB Audio Lock delay units"
///
/// This page lists the valid lock delay unit types.
///
/// !Units
/// - AUDDataEndpointDescriptor_MILLISECONDS
/// - AUDDataEndpointDescriptor_PCMSAMPLES
/// Lock delay is expressed in milliseconds.
#define AUDDataEndpointDescriptor_MILLISECONDS 1
/// Lock delay is expressed in decoded PCM samples.
#define AUDDataEndpointDescriptor_PCMSAMPLES 2
//------------------------------------------------------------------------------
//------------------------------------------------------------------------------
// Types
//------------------------------------------------------------------------------
#ifdef __ICCARM__ // IAR
#pragma pack(1) // IAR
#define __attribute__(...) // IAR
#endif // IAR
//------------------------------------------------------------------------------
/// Gives additional information about an USB endpoint used to transmit audio
/// data to or from the host.
//------------------------------------------------------------------------------
typedef struct {
/// Size of descriptor in bytes.
unsigned char bLength;
/// Descriptor type (AUDGenericDescriptor_ENDPOINT).
unsigned char bDescriptorType;
/// Descriptor subtype (AUDDataEndpointDescriptor_SUBTYPE).
unsigned char bDescriptorSubType;
/// Indicates available controls and requirement on packet sizes.
unsigned char bmAttributes;
/// Indicates the units of the wLockDelay fields.
/// \sa "USB Audio Lock delay units"
unsigned char bLockDelayUnits;
/// Time it takes for the endpoint to lock its internal clock circuitry.
unsigned short wLockDelay;
} __attribute__ ((packed)) AUDDataEndpointDescriptor; // GCC
#ifdef __ICCARM__ // IAR
#pragma pack() // IAR
#endif // IAR
#endif //#ifndef AUDDATAENDPOINTDESCRIPTOR_H
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