/*
LUFA Library
- Copyright (C) Dean Camera, 2010.
-
+ Copyright (C) Dean Camera, 2011.
+
dean [at] fourwalledcubicle [dot] com
- www.fourwalledcubicle.com
+ www.lufa-lib.org
*/
/*
- Copyright 2010 Dean Camera (dean [at] fourwalledcubicle [dot] com)
+ Copyright 2011 Dean Camera (dean [at] fourwalledcubicle [dot] com)
- Permission to use, copy, modify, distribute, and sell this
+ Permission to use, copy, modify, distribute, and sell this
software and its documentation for any purpose is hereby granted
- without fee, provided that the above copyright notice appear in
+ without fee, 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
+ 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
*
* Header file for Descriptors.c.
*/
-
+
#ifndef _DESCRIPTORS_H_
#define _DESCRIPTORS_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 an Output Terminal Audio class specific descriptor. */
- #define DSUBTYPE_InputTerminal 0x02
-
- /** Audio class descriptor subtype value for an Input Terminal Audio class specific descriptor. */
- #define DSUBTYPE_OutputTerminal 0x03
-
- /** Audio class descriptor subtype value for a Feature Unit Audio class specific descriptor. */
- #define DSUBTYPE_FeatureUnit 0x06
-
- /** Audio class descriptor subtype value for a general Audio class specific descriptor. */
- #define DSUBTYPE_General 0x01
-
- /** Audio class descriptor subtype value for an Audio class specific descriptor indicating the format of an audio stream. */
- #define DSUBTYPE_Format 0x02
-
- //@{
- /** Supported channel mask for an Audio class terminal descriptor. See the Audio class specification for more details. */
-
- #define CHANNEL_LEFT_FRONT (1 << 0)
- #define CHANNEL_RIGHT_FRONT (1 << 1)
- #define CHANNEL_CENTER_FRONT (1 << 2)
- #define CHANNEL_LOW_FREQ_ENHANCE (1 << 3)
- #define CHANNEL_LEFT_SURROUND (1 << 4)
- #define CHANNEL_RIGHT_SURROUND (1 << 5)
- #define CHANNEL_LEFT_OF_CENTER (1 << 6)
- #define CHANNEL_RIGHT_OF_CENTER (1 << 7)
- #define CHANNEL_SURROUND (1 << 8)
- #define CHANNEL_SIDE_LEFT (1 << 9)
- #define CHANNEL_SIDE_RIGHT (1 << 10)
- #define CHANNEL_TOP (1 << 11)
- //@}
-
- //@{
- /** Supported feature mask for an Audio class feature unit descriptor. See the Audio class specification for more details. */
-
- #define FEATURE_MUTE (1 << 0)
- #define FEATURE_VOLUME (1 << 1)
- #define FEATURE_BASS (1 << 2)
- #define FEATURE_MID (1 << 3)
- #define FEATURE_TREBLE (1 << 4)
- #define FEATURE_GRAPHIC_EQUALIZER (1 << 5)
- #define FEATURE_AUTOMATIC_GAIN (1 << 6)
- #define FEATURE_DELAY (1 << 7)
- #define FEATURE_BASS_BOOST (1 << 8)
- #define FEATURE_BASS_LOUDNESS (1 << 9)
- //@}
-
- //@{
- /** Terminal type constant for an Audio class terminal descriptor. See the Audio class specification for more details. */
-
- #define TERMINAL_UNDEFINED 0x0100
- #define TERMINAL_STREAMING 0x0101
- #define TERMINAL_VENDOR 0x01FF
- #define TERMINAL_IN_UNDEFINED 0x0200
- #define TERMINAL_IN_MIC 0x0201
- #define TERMINAL_IN_DESKTOP_MIC 0x0202
- #define TERMINAL_IN_PERSONAL_MIC 0x0203
- #define TERMINAL_IN_OMNIDIR_MIC 0x0204
- #define TERMINAL_IN_MIC_ARRAY 0x0205
- #define TERMINAL_IN_PROCESSING_MIC 0x0206
- #define TERMINAL_IN_OUT_UNDEFINED 0x0300
- #define TERMINAL_OUT_SPEAKER 0x0301
- #define TERMINAL_OUT_HEADPHONES 0x0302
- #define TERMINAL_OUT_HEAD_MOUNTED 0x0303
- #define TERMINAL_OUT_DESKTOP 0x0304
- #define TERMINAL_OUT_ROOM 0x0305
- #define TERMINAL_OUT_COMMUNICATION 0x0306
- #define TERMINAL_OUT_LOWFREQ 0x0307
- //@}
-
- /** Convenience macro, to fill a 24-bit AudioSampleFreq_t structure with the given sample rate as a 24-bit number.
- *
- * \param[in] freq Required audio sampling frequency in HZ
- */
- #define SAMPLE_FREQ(freq) {LowWord: ((uint32_t)(freq) & 0x00FFFF), HighByte: (((uint32_t)(freq) >> 16) & 0x0000FF)}
-
- /** Mask for the attributes parameter of an Audio class specific Endpoint descriptor, indicating that the endpoint
- * accepts only filled endpoint packets of audio samples.
- */
- #define EP_ACCEPTS_ONLY_FULL_PACKETS (1 << 7)
-
- /** Mask for the attributes parameter of an Audio class specific Endpoint descriptor, indicating that the endpoint
- * will accept partially filled endpoint packets of audio samples.
- */
- #define EP_ACCEPTS_SMALL_PACKETS (0 << 7)
-
/** Endpoint number of the Audio isochronous streaming data endpoint. */
#define AUDIO_STREAM_EPNUM 1
-
+
/** Endpoint size in bytes of the Audio isochronous streaming data endpoint. The Windows audio stack requires
* at least 192 bytes for correct output, thus the smaller 128 byte maximum endpoint size on some of the smaller
* USB AVR models will result in unavoidable distorted output.
*/
#define AUDIO_STREAM_EPSIZE ENDPOINT_MAX_SIZE(AUDIO_STREAM_EPNUM)
-
- /** Sample frequency of the data being transmitted through the streaming endpoint. */
- #define AUDIO_SAMPLE_FREQUENCY 48000
-
- /* 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 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_Audio_Interface_AC_t;
-
- /** Type define for an Audio class specific Feature Unit descriptor. This indicates to the host what features
- * are present in the device's audio stream for basic control, such as per-channel volume. 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 UnitID; /**< ID value of this feature unit - must be a unique value within the device */
- uint8_t SourceID; /**< Source ID value of the audio source input into this feature unit */
-
- uint8_t ControlSize; /**< Size of each element in the ChanelControlls array */
- uint8_t ChannelControls[3]; /**< Feature masks for the control channel, and each separate audio channel */
-
- uint8_t FeatureUnitStrIndex; /**< Index of a string descriptor describing this descriptor within the device */
- } USB_Audio_FeatureUnit_t;
-
- /** Type define for an Audio class specific input terminal descriptor. This indicates to the host that the device
- * contains an input audio source, either from a physical terminal on the device, or a logical terminal (for example,
- * a USB endpoint). 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 TerminalID; /**< ID value of this terminal unit - must be a unique value within the device */
- uint16_t TerminalType; /**< Type of terminal, a TERMINAL_* mask */
- uint8_t AssociatedOutputTerminal; /**< ID of associated output terminal, for physically grouped terminals
- * such as the speaker and microphone of a phone handset
- */
- uint8_t TotalChannels; /**< Total number of separate audio channels within this interface (right, left, etc.) */
- uint16_t ChannelConfig; /**< CHANNEL_* masks indicating what channel layout is supported by this terminal */
-
- uint8_t ChannelStrIndex; /**< Index of a string descriptor describing this channel within the device */
- uint8_t TerminalStrIndex; /**< Index of a string descriptor describing this descriptor within the device */
- } USB_Audio_InputTerminal_t;
-
- /** Type define for an Audio class specific output terminal descriptor. This indicates to the host that the device
- * contains an output audio sink, either to a physical terminal on the device, or a logical terminal (for example,
- * a USB endpoint). 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 TerminalID; /**< ID value of this terminal unit - must be a unique value within the device */
- uint16_t TerminalType; /**< Type of terminal, a TERMINAL_* mask */
- uint8_t AssociatedInputTerminal; /**< ID of associated input terminal, for physically grouped terminals
- * such as the speaker and microphone of a phone handset
- */
- uint8_t SourceID; /**< ID value of the unit this terminal's audio is sourced from */
-
- uint8_t TerminalStrIndex; /**< Index of a string descriptor describing this descriptor within the device */
- } USB_Audio_OutputTerminal_t;
-
- /** Type define for an Audio class specific streaming interface descriptor. This indicates to the host
- * how audio streams within the device are formatted. 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 TerminalLink; /**< ID value of the output terminal this descriptor is describing */
-
- uint8_t FrameDelay; /**< Delay in frames resulting from the complete sample processing from input to output */
- uint16_t AudioFormat; /**< Format of the audio stream, see Audio Device Formats specification */
- } USB_Audio_Interface_AS_t;
-
- /** Type define for a 24bit audio sample frequency structure. GCC does not contain a built in 24bit datatype,
- * this this structure is used to build up the value instead. Fill this structure with the SAMPLE_FREQ() macro.
- */
- typedef struct
- {
- uint16_t LowWord; /**< Low 16 bits of the 24-bit value */
- uint8_t HighByte; /**< Upper 8 bits of the 24-bit value */
- } Audio_SampleFreq_t;
-
- /** Type define for an Audio class specific audio format descriptor. This is used to give the host full details
- * about the number of channels, the sample resolution, acceptable sample frequencies and encoding method used
- * in the device's audio streams. 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 FormatType; /**< Format of the audio stream, see Audio Device Formats specification */
- uint8_t Channels; /**< Total number of discrete channels in the stream */
-
- uint8_t SubFrameSize; /**< Size in bytes of each channel's sample data in the stream */
- uint8_t BitResolution; /**< Bits of resolution of each channel's samples in the stream */
-
- uint8_t SampleFrequencyType; /**< Total number of sample frequencies supported by the device */
- Audio_SampleFreq_t SampleFrequencies[1]; /**< Sample frequencies supported by the device */
- } USB_Audio_Format_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 synchronization information to, if needed (zero otherwise) */
- } USB_Audio_StreamEndpoint_Std_t;
-
- /** Type define for an Audio class specific extended endpoint descriptor. This contains extra information
- * on the usage of endpoints used to stream audio in and out of the USB Audio device, and follows an Audio
- * class specific extended 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 Attributes; /**< Audio class specific endpoint attributes, such as ACCEPTS_SMALL_PACKETS */
-
- uint8_t LockDelayUnits; /**< Units used for the LockDelay field, see Audio class specification */
- uint16_t LockDelay; /**< Time required to internally lock endpoint's internal clock recovery circuitry */
- } USB_Audio_StreamEndpoint_Spc_t;
+ /* Type Defines: */
/** 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 Audio_ControlInterface;
- USB_Audio_Interface_AC_t Audio_ControlInterface_SPC;
- USB_Audio_InputTerminal_t Audio_InputTerminal;
- USB_Audio_OutputTerminal_t Audio_OutputTerminal;
- USB_Descriptor_Interface_t Audio_StreamInterface_Alt0;
- USB_Descriptor_Interface_t Audio_StreamInterface_Alt1;
- USB_Audio_Interface_AS_t Audio_StreamInterface_SPC;
- USB_Audio_Format_t Audio_AudioFormat;
- USB_Audio_StreamEndpoint_Std_t Audio_StreamEndpoint;
- USB_Audio_StreamEndpoint_Spc_t Audio_StreamEndpoint_SPC;
+ USB_Descriptor_Configuration_Header_t Config;
+
+ // Audio Control Interface
+ USB_Descriptor_Interface_t Audio_ControlInterface;
+ USB_Audio_Descriptor_Interface_AC_t Audio_ControlInterface_SPC;
+ USB_Audio_Descriptor_InputTerminal_t Audio_InputTerminal;
+ USB_Audio_Descriptor_OutputTerminal_t Audio_OutputTerminal;
+
+ // Audio Streaming Interface
+ USB_Descriptor_Interface_t Audio_StreamInterface_Alt0;
+ USB_Descriptor_Interface_t Audio_StreamInterface_Alt1;
+ USB_Audio_Descriptor_Interface_AS_t Audio_StreamInterface_SPC;
+ USB_Audio_Descriptor_Format_t Audio_AudioFormat;
+ USB_Audio_SampleFreq_t Audio_AudioFormatSampleRates[5];
+ USB_Audio_Descriptor_StreamEndpoint_Std_t Audio_StreamEndpoint;
+ USB_Audio_Descriptor_StreamEndpoint_Spc_t Audio_StreamEndpoint_SPC;
} USB_Descriptor_Configuration_t;
-
+
/* Function Prototypes: */
uint16_t CALLBACK_USB_GetDescriptor(const uint16_t wValue,
const uint8_t wIndex,
- void** const DescriptorAddress) ATTR_WARN_UNUSED_RESULT ATTR_NON_NULL_PTR_ARG(3);
+ const void** const DescriptorAddress)
+ ATTR_WARN_UNUSED_RESULT ATTR_NON_NULL_PTR_ARG(3);
#endif
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