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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 a class for manipulating USB %audio streaming interface
/// descriptors.
///
/// !!!Usage
///
/// - For a USB %device:
/// -# Declare an AUDStreamingInterfaceDescriptor instance as part of the
/// configuration descriptors returned by a USB %audio %device.
//------------------------------------------------------------------------------
#ifndef AUDSTREAMINGINTERFACEDESCRIPTOR_H
#define AUDSTREAMINGINTERFACEDESCRIPTOR_H
//------------------------------------------------------------------------------
// Definitions
//------------------------------------------------------------------------------
//------------------------------------------------------------------------------
/// \page "USB Audio streaming interface codes"
///
/// This page lists the class, subclass and protocol codes that an Audio
/// Streaming interface should display in its descriptor.
///
/// !Codes
/// - AUDStreamingInterfaceDescriptor_CLASS
/// - AUDStreamingInterfaceDescriptor_SUBCLASS
/// - AUDStreamingInterfaceDescriptor_PROTOCOL
/// Class code for an USB audio streaming interface.
#define AUDStreamingInterfaceDescriptor_CLASS 0x01
/// Subclass code for an audio streaming interface.
#define AUDStreamingInterfaceDescriptor_SUBCLASS 0x02
/// Protocol code for an audio streaming interface.
#define AUDStreamingInterfaceDescriptor_PROTOCOL 0x00
//------------------------------------------------------------------------------
//------------------------------------------------------------------------------
/// \page "USB Audio streaming descriptor subtypes"
///
/// This page lists the possible subtypes for audio-specific descriptor appended
/// to an Audio Streaming interface.
///
/// !Subtypes
/// - AUDStreamingInterfaceDescriptor_GENERAL
/// - AUDStreamingInterfaceDescriptor_FORMATTYPE
/// - AUDStreamingInterfaceDescriptor_FORMATSPECIFIC
/// General descriptor subtype.
#define AUDStreamingInterfaceDescriptor_GENERAL 0x01
/// Format type descriptor subtype.
#define AUDStreamingInterfaceDescriptor_FORMATTYPE 0x02
/// Format specific descriptor subtype.
#define AUDStreamingInterfaceDescriptor_FORMATSPECIFIC 0x03
//------------------------------------------------------------------------------
//------------------------------------------------------------------------------
// Types
//------------------------------------------------------------------------------
#ifdef __ICCARM__ // IAR
#pragma pack(1) // IAR
#define __attribute__(...) // IAR
#endif // IAR
//------------------------------------------------------------------------------
/// Provides additional information about an audio streaming interface to
/// the USB host.
//------------------------------------------------------------------------------
typedef struct {
/// Size of descriptor in bytes.
unsigned char bLength;
/// Descriptor type (AUDGenericDescriptor_INTERFACE).
unsigned char bDescriptorType;
/// Descriptor subtype (AUDStreamingInterfaceDescriptor_GENERAL).
unsigned char bDescriptorSubType;
/// Terminal ID to which the interface is connected.
unsigned char bTerminalLink;
/// Delay introduced by the data path, in number of frames.
unsigned char bDelay;
/// Audio data format used by this interface.
unsigned short wFormatTag;
} __attribute__ ((packed)) AUDStreamingInterfaceDescriptor; // GCC
#ifdef __ICCARM__ // IAR
#pragma pack() // IAR
#endif // IAR
#endif //#ifndef AUDSTREAMINGINTERFACEDESCRIPTOR_H
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