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+/*
+ LUFA Library
+ Copyright (C) Dean Camera, 2009.
+
+ dean [at] fourwalledcubicle [dot] com
+ www.fourwalledcubicle.com
+*/
+
+/*
+ Copyright 2009 Dean Camera (dean [at] fourwalledcubicle [dot] com)
+
+ Permission to use, copy, modify, and distribute this software
+ and its documentation for any purpose and without fee is hereby
+ granted, provided that the above copyright notice appear in all
+ copies and that both that the copyright notice and this
+ permission notice and warranty disclaimer appear in supporting
+ documentation, and that the name of the author not be used in
+ advertising or publicity pertaining to distribution of the
+ software without specific, written prior permission.
+
+ The author disclaim all warranties with regard to this
+ software, including all implied warranties of merchantability
+ and fitness. In no event shall the author be liable for any
+ special, indirect or consequential damages or any damages
+ whatsoever resulting from loss of use, data or profits, whether
+ in an action of contract, negligence or other tortious action,
+ arising out of or in connection with the use or performance of
+ this software.
+*/
+
+/** \file
+ *
+ * Header file for Descriptors.c.
+ */
+
+#ifndef _DESCRIPTORS_H_
+#define _DESCRIPTORS_H_
+
+ /* Includes: */
+ #include <LUFA/Drivers/USB/USB.h>
+
+ #include <avr/pgmspace.h>
+
+ /* Macros: */
+ /** Descriptor header constant to indicate a Audio class interface descriptor. */
+ #define DTYPE_AudioInterface 0x24
+
+ /** Descriptor header constant to indicate a Audio class endpoint descriptor. */
+ #define DTYPE_AudioEndpoint 0x25
+
+ /** Audio class descriptor subtype value for a Audio class specific header descriptor. */
+ #define DSUBTYPE_Header 0x01
+
+ /** Audio class descriptor subtype value for a Audio class specific MIDI input jack descriptor. */
+ #define DSUBTYPE_InputJack 0x02
+
+ /** Audio class descriptor subtype value for a Audio class specific MIDI output jack descriptor. */
+ #define DSUBTYPE_OutputJack 0x03
+
+ /** Audio class descriptor subtype value for a general Audio class specific descriptor. */
+ #define DSUBTYPE_General 0x01
+
+ /** Audio class descriptor jack type value for an embedded (logical) MIDI input or output jack. */
+ #define JACKTYPE_EMBEDDED 0x01
+
+ /** Audio class descriptor jack type value for an external (physical) MIDI input or output jack. */
+ #define JACKTYPE_EXTERNAL 0x02
+
+ /** Endpoint number of the MIDI streaming data OUT endpoint, for host-to-device data transfers. */
+ #define MIDI_STREAM_OUT_EPNUM 1
+
+ /** Endpoint number of the MIDI streaming data IN endpoint, for device-to-host data transfers. */
+ #define MIDI_STREAM_IN_EPNUM 2
+
+ /** Endpoint size in bytes of the Audio isochronous streaming data IN and OUT endpoints. */
+ #define MIDI_STREAM_EPSIZE 64
+
+ /* Type Defines: */
+ /** Type define for an Audio class specific interface descriptor. This follows a regular interface descriptor to
+ * supply extra information about the audio device's layout to the host. See the USB Audio specification for more
+ * details.
+ */
+ typedef struct
+ {
+ USB_Descriptor_Header_t Header; /**< Regular descriptor header containing the descriptor's type and length */
+ uint8_t Subtype; /**< Sub type value used to distinguish between audio class specific descriptors */
+
+ uint16_t ACSpecification; /** Binary coded decimal value, indicating the supported Audio Class specification version */
+ uint16_t TotalLength; /** Total length of the Audio class specific control descriptors, including this descriptor */
+
+ uint8_t InCollection; /** Total number of audio class interfaces within this device */
+ uint8_t InterfaceNumbers[1]; /** Interface numbers of each audio interface */
+ } USB_AudioInterface_AC_t;
+
+ /** Type define for an Audio class specific MIDI streaming interface descriptor. This indicates to the host
+ * how MIDI the specification compliance of the device and the total length of the Audio class specific descriptors.
+ * See the USB Audio specification for more details.
+ */
+ typedef struct
+ {
+ USB_Descriptor_Header_t Header; /**< Regular descriptor header containing the descriptor's type and length */
+ uint8_t Subtype; /**< Sub type value used to distinguish between audio class specific descriptors */
+
+ uint16_t AudioSpecification; /**< Binary coded decimal value, indicating the supported Audio Class specification version */
+ uint16_t TotalLength; /**< Total length of the Audio class specific descriptors, including this descriptor */
+ } USB_AudioInterface_MIDI_AS_t;
+
+ /** Type define for an Audio class specific endpoint descriptor. This contains a regular endpoint
+ * descriptor with a few Audio-class specific extensions. See the USB Audio specification for more details.
+ */
+ typedef struct
+ {
+ USB_Descriptor_Endpoint_t Endpoint; /**< Standard endpoint descriptor describing the audio endpoint */
+
+ uint8_t Refresh; /**< Always set to zero */
+ uint8_t SyncEndpointNumber; /**< Endpoint address to send synchronisation information to, if needed (zero otherwise) */
+ } USB_AudioStreamEndpoint_Std_t;
+
+ /** Type define for an Audio class specific MIDI IN jack. This gives information to the host on a MIDI input, either
+ * a physical input jack, or a logical jack (recieving input data internally, or from the host via an endpoint).
+ */
+ typedef struct
+ {
+ USB_Descriptor_Header_t Header; /**< Regular descriptor header containing the descriptor's type and length */
+ uint8_t Subtype; /**< Sub type value used to distinguish between audio class specific descriptors */
+
+ uint8_t JackType; /**< Type of jack, one of the JACKTYPE_* mask values */
+ uint8_t JackID; /**< ID value of this jack - must be a unique value within the device */
+
+ uint8_t JackStrIndex; /**< Index of a string descriptor describing this descriptor within the device */
+ } USB_MIDI_In_Jack_t;
+
+ /** Type define for an Audio class specific MIDI OUT jack. This gives information to the host on a MIDI output, either
+ * a physical output jack, or a logical jack (sending output data internally, or to the host via an endpoint).
+ */
+ typedef struct
+ {
+ USB_Descriptor_Header_t Header; /**< Regular descriptor header containing the descriptor's type and length */
+ uint8_t Subtype; /**< Sub type value used to distinguish between audio class specific descriptors */
+
+ uint8_t JackType; /**< Type of jack, one of the JACKTYPE_* mask values */
+ uint8_t JackID; /**< ID value of this jack - must be a unique value within the device */
+
+ uint8_t NumberOfPins; /**< Number of output channels within the jack, either physical or logical */
+ uint8_t SourceJackID[1]; /**< ID of each output pin's source data jack */
+ uint8_t SourcePinID[1]; /**< Pin number in the input jack of each output pin's source data */
+
+ uint8_t JackStrIndex; /**< Index of a string descriptor describing this descriptor within the device */
+ } USB_MIDI_Out_Jack_t;
+
+ /** Type define for an Audio class specific extended MIDI jack endpoint descriptor. This contains extra information
+ * on the usage of MIDI endpoints used to stream MIDI events in and out of the USB Audio device, and follows an Audio
+ * class specific extended MIDI endpoint descriptor. See the USB Audio specification for more details.
+ */
+ typedef struct
+ {
+ USB_Descriptor_Header_t Header; /**< Regular descriptor header containing the descriptor's type and length */
+ uint8_t Subtype; /**< Sub type value used to distinguish between audio class specific descriptors */
+
+ uint8_t TotalEmbeddedJacks; /**< Total number of jacks inside this endpoint */
+ uint8_t AssociatedJackID[1]; /**< IDs of each jack inside the endpoint */
+ } USB_MIDI_Jack_Endpoint_t;
+
+ /** Type define for the device configuration descriptor structure. This must be defined in the
+ * application code, as the configuration descriptor contains several sub-descriptors which
+ * vary between devices, and which describe the device's usage to the host.
+ */
+ typedef struct
+ {
+ USB_Descriptor_Configuration_Header_t Config;
+ USB_Descriptor_Interface_t AudioControlInterface;
+ USB_AudioInterface_AC_t AudioControlInterface_SPC;
+ USB_Descriptor_Interface_t AudioStreamInterface;
+ USB_AudioInterface_MIDI_AS_t AudioStreamInterface_SPC;
+ USB_MIDI_In_Jack_t MIDI_In_Jack_Emb;
+ USB_MIDI_In_Jack_t MIDI_In_Jack_Ext;
+ USB_MIDI_Out_Jack_t MIDI_Out_Jack_Emb;
+ USB_MIDI_Out_Jack_t MIDI_Out_Jack_Ext;
+ USB_AudioStreamEndpoint_Std_t MIDI_In_Jack_Endpoint;
+ USB_MIDI_Jack_Endpoint_t MIDI_In_Jack_Endpoint_SPC;
+ USB_AudioStreamEndpoint_Std_t MIDI_Out_Jack_Endpoint;
+ USB_MIDI_Jack_Endpoint_t MIDI_Out_Jack_Endpoint_SPC;
+ } USB_Descriptor_Configuration_t;
+
+ /* Function Prototypes: */
+ uint16_t USB_GetDescriptor(const uint16_t wValue, const uint8_t wIndex, void** const DescriptorAddress)
+ ATTR_WARN_UNUSED_RESULT ATTR_NON_NULL_PTR_ARG(3);
+
+#endif