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diff --git a/usb/common/audio/AUDGenericDescriptor.h b/usb/common/audio/AUDGenericDescriptor.h
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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
+///
+/// Constants for manipulating USB audio-specific descriptors.
+///
+/// !!!Usage
+///
+/// - For a USB %device:
+///     -# When declaring an Audio-specific descriptor, use the descriptor types
+///        and subtypes defined in this unit (see "USB Audio descriptor types"
+///        and "USB Audio descriptor subtypes").
+//------------------------------------------------------------------------------
+
+#ifndef AUDGENERICDESCRIPTOR_H
+#define AUDGENERICDESCRIPTOR_H
+
+//------------------------------------------------------------------------------
+//         Definitions
+//------------------------------------------------------------------------------
+
+//------------------------------------------------------------------------------
+/// \page "USB Audio descriptor types"
+///
+/// This page lists the available types for USB audio-specific descriptors.
+/// 
+/// !Types
+/// - AUDGenericDescriptor_DEVICE
+/// - AUDGenericDescriptor_CONFIGURATION
+/// - AUDGenericDescriptor_STRING
+/// - AUDGenericDescriptor_INTERFACE
+/// - AUDGenericDescriptor_ENDPOINT
+
+/// Descriptor gives detail about the whole device.
+#define AUDGenericDescriptor_DEVICE                     0x21
+
+/// Descriptor gives detail about a configuration.
+#define AUDGenericDescriptor_CONFIGURATION              0x22
+
+/// Descriptor gives detail about a string.
+#define AUDGenericDescriptor_STRING                     0x23
+
+/// Descriptor gives detail about an interface.
+#define AUDGenericDescriptor_INTERFACE                  0x24
+
+/// Descriptor gives detail about an endpoint.
+#define AUDGenericDescriptor_ENDPOINT                   0x25
+//------------------------------------------------------------------------------
+
+//------------------------------------------------------------------------------
+/// \page "USB Audio descriptor subtypes"
+///
+/// This page lists the possible subtypes for USB audio-specific descriptors.
+/// 
+/// !Subtypes
+/// - AUDGenericDescriptor_HEADER
+/// - AUDGenericDescriptor_INPUTTERMINAL
+/// - AUDGenericDescriptor_OUTPUTTERMINAL
+/// - AUDGenericDescriptor_MIXERUNIT
+/// - AUDGenericDescriptor_SELECTORUNIT
+/// - AUDGenericDescriptor_FEATUREUNIT
+/// - AUDGenericDescriptor_PROCESSINGUNIT
+/// - AUDGenericDescriptor_EXTENSIONUNIT
+
+/// Header descriptor subtype.
+#define AUDGenericDescriptor_HEADER                     0x01
+
+/// Input terminal descriptor subtype.
+#define AUDGenericDescriptor_INPUTTERMINAL              0x02
+
+/// Output terminal descriptor subtype.
+#define AUDGenericDescriptor_OUTPUTTERMINAL             0x03
+
+/// Mixer unit descriptor subtype.
+#define AUDGenericDescriptor_MIXERUNIT                  0x04
+
+/// Selector unit descriptor subtype.
+#define AUDGenericDescriptor_SELECTORUNIT               0x05
+
+/// Feature unit descriptor subtype.
+#define AUDGenericDescriptor_FEATUREUNIT                0x06
+
+/// Processing unit descriptor subtype.
+#define AUDGenericDescriptor_PROCESSINGUNIT             0x07
+
+///Extension unit descriptor subtype.
+#define AUDGenericDescriptor_EXTENSIONUNIT              0x08
+//------------------------------------------------------------------------------
+
+#endif //#ifndef AUDGENERICDESCRIPTOR_H
+