X-Git-Url: http://git.linex4red.de/pub/USBasp.git/blobdiff_plain/d4ca7fb44c7d326b96cf391f0275dc323dbe24de..5517f96e86b9447780a3e27bb455697f9fc65eea:/LUFA/Drivers/USB/Class/Common/Audio.h diff --git a/LUFA/Drivers/USB/Class/Common/Audio.h b/LUFA/Drivers/USB/Class/Common/Audio.h index 18ad163e6..5e65865a0 100644 --- a/LUFA/Drivers/USB/Class/Common/Audio.h +++ b/LUFA/Drivers/USB/Class/Common/Audio.h @@ -1,374 +1,667 @@ -/* - 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, distribute, and sell this - software and its documentation for any purpose is hereby granted - 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 - 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. -*/ - -/** \ingroup Group_USBClassAudio - * @defgroup Group_USBClassAudioCommon Common Class Definitions - * - * \section Module Description - * Constants, Types and Enum definitions that are common to both Device and Host modes for the USB - * Audio Class. - * - * @{ - */ - -#ifndef _AUDIO_CLASS_COMMON_H_ -#define _AUDIO_CLASS_COMMON_H_ - - /* Includes: */ - #include "../../USB.h" - - #include - - /* Enable C linkage for C++ Compilers: */ - #if defined(__cplusplus) - extern "C" { - #endif - - /* Macros: */ - #if !defined(AUDIO_TOTAL_SAMPLE_RATES) || defined(__DOXYGEN__) - /** Total number of discrete audio sample rates supported by the device. This value can be overridden by defining this - * token in the project makefile to the desired value, and passing it to the compiler via the -D switch. - */ - #define AUDIO_TOTAL_SAMPLE_RATES 1 - #endif - - /** 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) - - /** Supported channel mask for an Audio class terminal descriptor. See the Audio class specification for more details. */ - #define CHANNEL_RIGHT_FRONT (1 << 1) - - /** Supported channel mask for an Audio class terminal descriptor. See the Audio class specification for more details. */ - #define CHANNEL_CENTER_FRONT (1 << 2) - - /** Supported channel mask for an Audio class terminal descriptor. See the Audio class specification for more details. */ - #define CHANNEL_LOW_FREQ_ENHANCE (1 << 3) - - /** Supported channel mask for an Audio class terminal descriptor. See the Audio class specification for more details. */ - #define CHANNEL_LEFT_SURROUND (1 << 4) - - /** Supported channel mask for an Audio class terminal descriptor. See the Audio class specification for more details. */ - #define CHANNEL_RIGHT_SURROUND (1 << 5) - - /** Supported channel mask for an Audio class terminal descriptor. See the Audio class specification for more details. */ - #define CHANNEL_LEFT_OF_CENTER (1 << 6) - - /** Supported channel mask for an Audio class terminal descriptor. See the Audio class specification for more details. */ - #define CHANNEL_RIGHT_OF_CENTER (1 << 7) - - /** Supported channel mask for an Audio class terminal descriptor. See the Audio class specification for more details. */ - #define CHANNEL_SURROUND (1 << 8) - - /** Supported channel mask for an Audio class terminal descriptor. See the Audio class specification for more details. */ - #define CHANNEL_SIDE_LEFT (1 << 9) - - /** Supported channel mask for an Audio class terminal descriptor. See the Audio class specification for more details. */ - #define CHANNEL_SIDE_RIGHT (1 << 10) - - /** Supported channel mask for an Audio class terminal descriptor. See the Audio class specification for more details. */ - #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) - - /** Supported feature mask for an Audio class feature unit descriptor. See the Audio class specification for more details. */ - #define FEATURE_VOLUME (1 << 1) - - /** Supported feature mask for an Audio class feature unit descriptor. See the Audio class specification for more details. */ - #define FEATURE_BASS (1 << 2) - - /** Supported feature mask for an Audio class feature unit descriptor. See the Audio class specification for more details. */ - #define FEATURE_MID (1 << 3) - - /** Supported feature mask for an Audio class feature unit descriptor. See the Audio class specification for more details. */ - #define FEATURE_TREBLE (1 << 4) - - /** Supported feature mask for an Audio class feature unit descriptor. See the Audio class specification for more details. */ - #define FEATURE_GRAPHIC_EQUALIZER (1 << 5) - - /** Supported feature mask for an Audio class feature unit descriptor. See the Audio class specification for more details. */ - - /** Supported feature mask for an Audio class feature unit descriptor. See the Audio class specification for more details. */ - #define FEATURE_AUTOMATIC_GAIN (1 << 6) - - /** Supported feature mask for an Audio class feature unit descriptor. See the Audio class specification for more details. */ - #define FEATURE_DELAY (1 << 7) - - /** Supported feature mask for an Audio class feature unit descriptor. See the Audio class specification for more details. */ - #define FEATURE_BASS_BOOST (1 << 8) - - /** Supported feature mask for an Audio class feature unit descriptor. See the Audio class specification for more details. */ - #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 - - /** Terminal type constant for an Audio class terminal descriptor. See the Audio class specification for more details. */ - #define TERMINAL_STREAMING 0x0101 - - /** Terminal type constant for an Audio class terminal descriptor. See the Audio class specification for more details. */ - #define TERMINAL_VENDOR 0x01FF - - /** Terminal type constant for an Audio class terminal descriptor. See the Audio class specification for more details. */ - #define TERMINAL_IN_UNDEFINED 0x0200 - - /** Terminal type constant for an Audio class terminal descriptor. See the Audio class specification for more details. */ - #define TERMINAL_IN_MIC 0x0201 - - /** Terminal type constant for an Audio class terminal descriptor. See the Audio class specification for more details. */ - #define TERMINAL_IN_DESKTOP_MIC 0x0202 - - /** Terminal type constant for an Audio class terminal descriptor. See the Audio class specification for more details. */ - #define TERMINAL_IN_PERSONAL_MIC 0x0203 - - /** Terminal type constant for an Audio class terminal descriptor. See the Audio class specification for more details. */ - #define TERMINAL_IN_OMNIDIR_MIC 0x0204 - - /** Terminal type constant for an Audio class terminal descriptor. See the Audio class specification for more details. */ - #define TERMINAL_IN_MIC_ARRAY 0x0205 - - /** Terminal type constant for an Audio class terminal descriptor. See the Audio class specification for more details. */ - #define TERMINAL_IN_PROCESSING_MIC 0x0206 - - /** Terminal type constant for an Audio class terminal descriptor. See the Audio class specification for more details. */ - #define TERMINAL_IN_OUT_UNDEFINED 0x0300 - - /** Terminal type constant for an Audio class terminal descriptor. See the Audio class specification for more details. */ - #define TERMINAL_OUT_SPEAKER 0x0301 - - /** Terminal type constant for an Audio class terminal descriptor. See the Audio class specification for more details. */ - #define TERMINAL_OUT_HEADPHONES 0x0302 - - /** Terminal type constant for an Audio class terminal descriptor. See the Audio class specification for more details. */ - #define TERMINAL_OUT_HEAD_MOUNTED 0x0303 - - /** Terminal type constant for an Audio class terminal descriptor. See the Audio class specification for more details. */ - #define TERMINAL_OUT_DESKTOP 0x0304 - - /** Terminal type constant for an Audio class terminal descriptor. See the Audio class specification for more details. */ - #define TERMINAL_OUT_ROOM 0x0305 - - /** Terminal type constant for an Audio class terminal descriptor. See the Audio class specification for more details. */ - #define TERMINAL_OUT_COMMUNICATION 0x0306 - - /** Terminal type constant for an Audio class terminal descriptor. See the Audio class specification for more details. */ - #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 AUDIO_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) - - /* 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 */ - } USB_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 */ - USB_Audio_SampleFreq_t SampleFrequencies[AUDIO_TOTAL_SAMPLE_RATES]; /**< 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; - - /* Disable C linkage for C++ Compilers: */ - #if defined(__cplusplus) - } - #endif - -#endif - -/** @} */ +/* + LUFA Library + Copyright (C) Dean Camera, 2010. + + dean [at] fourwalledcubicle [dot] com + www.fourwalledcubicle.com +*/ + +/* + Copyright 2010 Dean Camera (dean [at] fourwalledcubicle [dot] com) + + 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 + 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 + * \brief Common definitions and declarations for the library USB Audio 1.0 Class driver. + * + * Common definitions and declarations for the library USB Audio 1.0 Class driver. + * + * \note This file should not be included directly. It is automatically included as needed by the class driver + * dispatch header located in LUFA/Drivers/USB/Class/Audio.h. + */ + +/** \ingroup Group_USBClassAudio + * @defgroup Group_USBClassAudioCommon Common Class Definitions + * + * \section Module Description + * Constants, Types and Enum definitions that are common to both Device and Host modes for the USB + * Audio 1.0 Class. + * + * @{ + */ + +#ifndef _AUDIO_CLASS_COMMON_H_ +#define _AUDIO_CLASS_COMMON_H_ + + /* Includes: */ + #include "../../USB.h" + + #include + + /* Enable C linkage for C++ Compilers: */ + #if defined(__cplusplus) + extern "C" { + #endif + + /* Preprocessor Checks: */ + #if !defined(__INCLUDE_FROM_AUDIO_DRIVER) + #error Do not include this file directly. Include LUFA/Drivers/Class/Audio.h instead. + #endif + + /* Macros: */ + #if !defined(AUDIO_TOTAL_SAMPLE_RATES) || defined(__DOXYGEN__) + /** Total number of discrete audio sample rates supported by the device. This value can be overridden by defining this + * token in the project makefile to the desired value, and passing it to the compiler via the -D switch. + */ + #define AUDIO_TOTAL_SAMPLE_RATES 1 + #endif + + /** Supported channel mask for an Audio class terminal descriptor. See the Audio class specification for more details. */ + #define AUDIO_CHANNEL_LEFT_FRONT (1 << 0) + + /** Supported channel mask for an Audio class terminal descriptor. See the Audio class specification for more details. */ + #define AUDIO_CHANNEL_RIGHT_FRONT (1 << 1) + + /** Supported channel mask for an Audio class terminal descriptor. See the Audio class specification for more details. */ + #define AUDIO_CHANNEL_CENTER_FRONT (1 << 2) + + /** Supported channel mask for an Audio class terminal descriptor. See the Audio class specification for more details. */ + #define AUDIO_CHANNEL_LOW_FREQ_ENHANCE (1 << 3) + + /** Supported channel mask for an Audio class terminal descriptor. See the Audio class specification for more details. */ + #define AUDIO_CHANNEL_LEFT_SURROUND (1 << 4) + + /** Supported channel mask for an Audio class terminal descriptor. See the Audio class specification for more details. */ + #define AUDIO_CHANNEL_RIGHT_SURROUND (1 << 5) + + /** Supported channel mask for an Audio class terminal descriptor. See the Audio class specification for more details. */ + #define AUDIO_CHANNEL_LEFT_OF_CENTER (1 << 6) + + /** Supported channel mask for an Audio class terminal descriptor. See the Audio class specification for more details. */ + #define AUDIO_CHANNEL_RIGHT_OF_CENTER (1 << 7) + + /** Supported channel mask for an Audio class terminal descriptor. See the Audio class specification for more details. */ + #define AUDIO_CHANNEL_SURROUND (1 << 8) + + /** Supported channel mask for an Audio class terminal descriptor. See the Audio class specification for more details. */ + #define AUDIO_CHANNEL_SIDE_LEFT (1 << 9) + + /** Supported channel mask for an Audio class terminal descriptor. See the Audio class specification for more details. */ + #define AUDIO_CHANNEL_SIDE_RIGHT (1 << 10) + + /** Supported channel mask for an Audio class terminal descriptor. See the Audio class specification for more details. */ + #define AUDIO_CHANNEL_TOP (1 << 11) + + /** Supported feature mask for an Audio class feature unit descriptor. See the Audio class specification for more details. */ + #define AUDIO_FEATURE_MUTE (1 << 0) + + /** Supported feature mask for an Audio class feature unit descriptor. See the Audio class specification for more details. */ + #define AUDIO_FEATURE_VOLUME (1 << 1) + + /** Supported feature mask for an Audio class feature unit descriptor. See the Audio class specification for more details. */ + #define AUDIO_FEATURE_BASS (1 << 2) + + /** Supported feature mask for an Audio class feature unit descriptor. See the Audio class specification for more details. */ + #define AUDIO_FEATURE_MID (1 << 3) + + /** Supported feature mask for an Audio class feature unit descriptor. See the Audio class specification for more details. */ + #define AUDIO_FEATURE_TREBLE (1 << 4) + + /** Supported feature mask for an Audio class feature unit descriptor. See the Audio class specification for more details. */ + #define AUDIO_FEATURE_GRAPHIC_EQUALIZER (1 << 5) + + /** Supported feature mask for an Audio class feature unit descriptor. See the Audio class specification for more details. */ + #define AUDIO_FEATURE_AUTOMATIC_GAIN (1 << 6) + + /** Supported feature mask for an Audio class feature unit descriptor. See the Audio class specification for more details. */ + #define AUDIO_FEATURE_DELAY (1 << 7) + + /** Supported feature mask for an Audio class feature unit descriptor. See the Audio class specification for more details. */ + #define AUDIO_FEATURE_BASS_BOOST (1 << 8) + + /** Supported feature mask for an Audio class feature unit descriptor. See the Audio class specification for more details. */ + #define AUDIO_FEATURE_BASS_LOUDNESS (1 << 9) + + /** Terminal type constant for an Audio class terminal descriptor. See the Audio class specification for more details. */ + #define AUDIO_TERMINAL_UNDEFINED 0x0100 + + /** Terminal type constant for an Audio class terminal descriptor. See the Audio class specification for more details. */ + #define AUDIO_TERMINAL_STREAMING 0x0101 + + /** Terminal type constant for an Audio class terminal descriptor. See the Audio class specification for more details. */ + #define AUDIO_TERMINAL_VENDOR 0x01FF + + /** Terminal type constant for an Audio class terminal descriptor. See the Audio class specification for more details. */ + #define AUDIO_TERMINAL_IN_UNDEFINED 0x0200 + + /** Terminal type constant for an Audio class terminal descriptor. See the Audio class specification for more details. */ + #define AUDIO_TERMINAL_IN_MIC 0x0201 + + /** Terminal type constant for an Audio class terminal descriptor. See the Audio class specification for more details. */ + #define AUDIO_TERMINAL_IN_DESKTOP_MIC 0x0202 + + /** Terminal type constant for an Audio class terminal descriptor. See the Audio class specification for more details. */ + #define AUDIO_TERMINAL_IN_PERSONAL_MIC 0x0203 + + /** Terminal type constant for an Audio class terminal descriptor. See the Audio class specification for more details. */ + #define AUDIO_TERMINAL_IN_OMNIDIR_MIC 0x0204 + + /** Terminal type constant for an Audio class terminal descriptor. See the Audio class specification for more details. */ + #define AUDIO_TERMINAL_IN_MIC_ARRAY 0x0205 + + /** Terminal type constant for an Audio class terminal descriptor. See the Audio class specification for more details. */ + #define AUDIO_TERMINAL_IN_PROCESSING_MIC 0x0206 + + /** Terminal type constant for an Audio class terminal descriptor. See the Audio class specification for more details. */ + #define AUDIO_TERMINAL_IN_OUT_UNDEFINED 0x0300 + + /** Terminal type constant for an Audio class terminal descriptor. See the Audio class specification for more details. */ + #define AUDIO_TERMINAL_OUT_SPEAKER 0x0301 + + /** Terminal type constant for an Audio class terminal descriptor. See the Audio class specification for more details. */ + #define AUDIO_TERMINAL_OUT_HEADPHONES 0x0302 + + /** Terminal type constant for an Audio class terminal descriptor. See the Audio class specification for more details. */ + #define AUDIO_TERMINAL_OUT_HEAD_MOUNTED 0x0303 + + /** Terminal type constant for an Audio class terminal descriptor. See the Audio class specification for more details. */ + #define AUDIO_TERMINAL_OUT_DESKTOP 0x0304 + + /** Terminal type constant for an Audio class terminal descriptor. See the Audio class specification for more details. */ + #define AUDIO_TERMINAL_OUT_ROOM 0x0305 + + /** Terminal type constant for an Audio class terminal descriptor. See the Audio class specification for more details. */ + #define AUDIO_TERMINAL_OUT_COMMUNICATION 0x0306 + + /** Terminal type constant for an Audio class terminal descriptor. See the Audio class specification for more details. */ + #define AUDIO_TERMINAL_OUT_LOWFREQ 0x0307 + + /** Convenience macro to fill a 24-bit \ref USB_Audio_SampleFreq_t structure with the given sample rate as a 24-bit number. + * + * \param[in] freq Required audio sampling frequency in HZ + */ + #define AUDIO_SAMPLE_FREQ(freq) {((uint32_t)freq & 0x00FFFF), (((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 AUDIO_EP_FULL_PACKETS_ONLY (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 AUDIO_EP_ACCEPTS_SMALL_PACKETS (0 << 7) + + /* Enums: */ + /** Audio class specific interface description subtypes, for the Audio Control interface. */ + enum Audio_CSInterface_AC_SubTypes_t + { + AUDIO_DSUBTYPE_CSInterface_Header = 0x01, /**< Audio class specific control interface header. */ + AUDIO_DSUBTYPE_CSInterface_InputTerminal = 0x02, /**< Audio class specific control interface Input Terminal. */ + AUDIO_DSUBTYPE_CSInterface_OutputTerminal = 0x03, /**< Audio class specific control interface Output Terminal. */ + AUDIO_DSUBTYPE_CSInterface_Mixer = 0x04, /**< Audio class specific control interface Mixer Unit. */ + AUDIO_DSUBTYPE_CSInterface_Selector = 0x05, /**< Audio class specific control interface Selector Unit. */ + AUDIO_DSUBTYPE_CSInterface_Feature = 0x06, /**< Audio class specific control interface Feature Unit. */ + AUDIO_DSUBTYPE_CSInterface_Processing = 0x07, /**< Audio class specific control interface Processing Unit. */ + AUDIO_DSUBTYPE_CSInterface_Extension = 0x08, /**< Audio class specific control interface Extension Unit. */ + }; + + /** Audio class specific interface description subtypes, for the Audio Streaming interface. */ + enum Audio_CSInterface_AS_SubTypes_t + { + AUDIO_DSUBTYPE_CSInterface_General = 0x01, /**< Audio class specific streaming interface general descriptor. */ + AUDIO_DSUBTYPE_CSInterface_FormatType = 0x02, /**< Audio class specific streaming interface format type descriptor. */ + AUDIO_DSUBTYPE_CSInterface_FormatSpecific = 0x03, /**< Audio class specific streaming interface format information descriptor. */ + }; + + /** Audio class specific endpoint description subtypes, for the Audio Streaming interface. */ + enum Audio_CSEndpoint_SubTypes_t + { + AUDIO_DSUBTYPE_CSEndpoint_General = 0x01, /**< Audio class specific endpoint general descriptor. */ + }; + + /* Type Defines: */ + /** \brief Audio class-specific Input Terminal Descriptor (LUFA naming conventions). + * + * 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. + * + * \see \ref USB_Audio_StdDescriptor_InputTerminal_t for the version of this type with standard element names. + */ + 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, + * must be \ref AUDIO_DSUBTYPE_CSInterface_InputTerminal. + */ + + 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_Descriptor_InputTerminal_t; + + /** \brief Audio class-specific Input Terminal Descriptor (USB-IF naming conventions). + * + * 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. + * + * \see \ref USB_Audio_Descriptor_InputTerminal_t for the version of this type with non-standard LUFA specific + * element names. + */ + typedef struct + { + uint8_t bLength; /**< Size of the descriptor, in bytes. */ + uint8_t bDescriptorType; /**< Type of the descriptor, either a value in \ref USB_DescriptorTypes_t or a value + * given by the specific class. + */ + + uint8_t bDescriptorSubtype; /**< Sub type value used to distinguish between audio class-specific descriptors, + * must be \ref AUDIO_DSUBTYPE_CSInterface_InputTerminal. + */ + uint8_t bTerminalID; /**< ID value of this terminal unit - must be a unique value within the device. */ + uint16_t wTerminalType; /**< Type of terminal, a TERMINAL_* mask. */ + uint8_t bAssocTerminal; /**< ID of associated output terminal, for physically grouped terminals + * such as the speaker and microphone of a phone handset. + */ + uint8_t bNrChannels; /**< Total number of separate audio channels within this interface (right, left, etc.) */ + uint16_t wChannelConfig; /**< CHANNEL_* masks indicating what channel layout is supported by this terminal. */ + + uint8_t iChannelNames; /**< Index of a string descriptor describing this channel within the device. */ + uint8_t iTerminal; /**< Index of a string descriptor describing this descriptor within the device. */ + } USB_Audio_StdDescriptor_InputTerminal_t; + + /** \brief Audio class-specific Output Terminal Descriptor (LUFA naming conventions). + * + * 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. + * + * \see \ref USB_Audio_StdDescriptor_OutputTerminal_t for the version of this type with standard element names. + */ + 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, + * must be \ref AUDIO_DSUBTYPE_CSInterface_OutputTerminal. + */ + + 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_Descriptor_OutputTerminal_t; + + /** \brief Audio class-specific Output Terminal Descriptor (USB-IF naming conventions). + * + * 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. + * + * \see \ref USB_Audio_Descriptor_OutputTerminal_t for the version of this type with non-standard LUFA specific + * element names. + */ + typedef struct + { + uint8_t bLength; /**< Size of the descriptor, in bytes. */ + uint8_t bDescriptorType; /**< Sub type value used to distinguish between audio class-specific descriptors, + * must be \ref AUDIO_DSUBTYPE_CSInterface_OutputTerminal. + */ + + uint8_t bDescriptorSubtype; /**< Sub type value used to distinguish between audio class-specific descriptors, + * a value from the \ref Audio_CSInterface_AC_SubTypes_t enum. + */ + uint8_t bTerminalID; /**< ID value of this terminal unit - must be a unique value within the device. */ + uint16_t wTerminalType; /**< Type of terminal, a TERMINAL_* mask. */ + uint8_t bAssocTerminal; /**< ID of associated input terminal, for physically grouped terminals + * such as the speaker and microphone of a phone handset. + */ + uint8_t bSourceID; /**< ID value of the unit this terminal's audio is sourced from. */ + + uint8_t iTerminal; /**< Index of a string descriptor describing this descriptor within the device. */ + } USB_Audio_StdDescriptor_OutputTerminal_t; + + /** \brief Audio class-specific Interface Descriptor (LUFA naming conventions). + * + * 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. + * + * \see \ref USB_Audio_StdDescriptor_Interface_AC_t for the version of this type with standard element names. + */ + 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, + * a value from the \ref Audio_CSInterface_AS_SubTypes_t enum. + */ + + 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 Streaming interfaces linked to this Audio Control interface (must be 1). */ + uint8_t InterfaceNumber; /**< Interface number of the associated Audio Streaming interface. */ + } USB_Audio_Descriptor_Interface_AC_t; + + /** \brief Audio class-specific Interface Descriptor (USB-IF naming conventions). + * + * 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. + * + * \see \ref USB_Audio_Descriptor_Interface_AC_t for the version of this type with non-standard LUFA specific + * element names. + */ + typedef struct + { + uint8_t bLength; /**< Size of the descriptor, in bytes. */ + uint8_t bDescriptorType; /**< Type of the descriptor, either a value in \ref USB_DescriptorTypes_t or a value + * given by the specific class. + */ + + uint8_t bDescriptorSubtype;/**< Sub type value used to distinguish between audio class-specific descriptors, + * a value from the \ref Audio_CSInterface_AS_SubTypes_t enum. + */ + + uint16_t bcdADC; /**< Binary coded decimal value, indicating the supported Audio Class specification version. */ + uint16_t wTotalLength; /**< Total length of the Audio class-specific descriptors, including this descriptor. */ + + uint8_t bInCollection; /**< Total number of Audio Streaming interfaces linked to this Audio Control interface (must be 1). */ + uint8_t bInterfaceNumbers; /**< Interface number of the associated Audio Streaming interface. */ + } USB_Audio_StdDescriptor_Interface_AC_t; + + /** \brief Audio class-specific Feature Unit Descriptor (LUFA naming conventions). + * + * 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. + * + * \see \ref USB_Audio_StdDescriptor_FeatureUnit_t for the version of this type with standard element names. + */ + 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, + * must be \ref AUDIO_DSUBTYPE_CSInterface_Feature. + */ + + 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_Descriptor_FeatureUnit_t; + + /** \brief Audio class-specific Feature Unit Descriptor (USB-IF naming conventions). + * + * 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. + * + * \see \ref USB_Audio_Descriptor_FeatureUnit_t for the version of this type with non-standard LUFA specific + * element names. + */ + typedef struct + { + uint8_t bLength; /**< Size of the descriptor, in bytes. */ + uint8_t bDescriptorType; /**< Type of the descriptor, either a value in \ref USB_DescriptorTypes_t or a value + * given by the specific class. + */ + + uint8_t bDescriptorSubtype; /**< Sub type value used to distinguish between audio class-specific descriptors, + * must be \ref AUDIO_DSUBTYPE_CSInterface_Feature. + */ + + uint8_t bUnitID; /**< ID value of this feature unit - must be a unique value within the device. */ + uint8_t bSourceID; /**< Source ID value of the audio source input into this feature unit. */ + + uint8_t bControlSize; /**< Size of each element in the ChanelControlls array. */ + uint8_t bmaControls[3]; /**< Feature masks for the control channel, and each separate audio channel. */ + + uint8_t iFeature; /**< Index of a string descriptor describing this descriptor within the device. */ + } USB_Audio_StdDescriptor_FeatureUnit_t; + + /** \brief Audio class-specific Streaming Audio Interface Descriptor (LUFA naming conventions). + * + * 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. + * + * \see \ref USB_Audio_StdDescriptor_Interface_AS_t for the version of this type with standard element names. + */ + 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, + * a value from the \ref Audio_CSInterface_AS_SubTypes_t enum. + */ + + 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_Descriptor_Interface_AS_t; + + /** \brief Audio class-specific Streaming Audio Interface Descriptor (USB-IF naming conventions). + * + * 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. + * + * \see \ref USB_Audio_Descriptor_Interface_AS_t for the version of this type with non-standard LUFA specific + * element names. + */ + typedef struct + { + uint8_t bLength; /**< Size of the descriptor, in bytes. */ + uint8_t bDescriptorType; /**< Type of the descriptor, either a value in \ref USB_DescriptorTypes_t or a value + * given by the specific class. + */ + + uint8_t bDescriptorSubtype; /**< Sub type value used to distinguish between audio class-specific descriptors, + * a value from the \ref Audio_CSInterface_AS_SubTypes_t enum. + */ + + uint8_t bTerminalLink; /**< ID value of the output terminal this descriptor is describing. */ + + uint8_t bDelay; /**< Delay in frames resulting from the complete sample processing from input to output. */ + uint16_t wFormatTag; /**< Format of the audio stream, see Audio Device Formats specification. */ + } USB_Audio_StdDescriptor_Interface_AS_t; + + /** \brief 24-Bit Audio Frequency Structure. + * + * 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 \ref AUDIO_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. */ + } USB_Audio_SampleFreq_t; + + /** \brief Audio class-specific Format Descriptor (LUFA naming conventions). + * + * 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. + * + * \see \ref USB_Audio_StdDescriptor_Format_t for the version of this type with standard element names. + */ + 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, + * must be \ref AUDIO_DSUBTYPE_CSInterface_FormatType. + */ + + 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. */ + USB_Audio_SampleFreq_t SampleFrequencies[AUDIO_TOTAL_SAMPLE_RATES]; /**< Sample frequencies supported by the device (must be 24-bit). */ + } USB_Audio_Descriptor_Format_t; + + /** \brief Audio class-specific Format Descriptor (USB-IF naming conventions). + * + * 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. + * + * \see \ref USB_Audio_Descriptor_Format_t for the version of this type with non-standard LUFA specific + * element names. + */ + typedef struct + { + uint8_t bLength; /**< Size of the descriptor, in bytes. */ + uint8_t bDescriptorType; /**< Sub type value used to distinguish between audio class-specific descriptors, + * must be \ref AUDIO_DSUBTYPE_CSInterface_FormatType. + */ + + uint8_t bDescriptorSubtype;/**< Sub type value used to distinguish between audio class-specific descriptors, + * a value from the \ref Audio_CSInterface_AS_SubTypes_t enum. + */ + + uint8_t bFormatType; /**< Format of the audio stream, see Audio Device Formats specification. */ + uint8_t bNrChannels; /**< Total number of discrete channels in the stream. */ + + uint8_t bSubFrameSize; /**< Size in bytes of each channel's sample data in the stream. */ + uint8_t bBitResolution; /**< Bits of resolution of each channel's samples in the stream. */ + + uint8_t bSampleFrequencyType; /**< Total number of sample frequencies supported by the device. */ + uint8_t SampleFrequencies[AUDIO_TOTAL_SAMPLE_RATES * 3]; /**< Sample frequencies supported by the device (must be 24-bit). */ + } USB_Audio_StdDescriptor_Format_t; + + /** \brief Audio class-specific Streaming Endpoint Descriptor (LUFA naming conventions). + * + * 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. + * + * \see \ref USB_Audio_StdDescriptor_StreamEndpoint_Std_t for the version of this type with standard element names. + */ + typedef struct + { + USB_Descriptor_Endpoint_t Endpoint; /**< Standard endpoint descriptor describing the audio endpoint. */ + + uint8_t Refresh; /**< Always set to zero for Audio class devices. */ + uint8_t SyncEndpointNumber; /**< Endpoint address to send synchronization information to, if needed (zero otherwise). */ + } USB_Audio_Descriptor_StreamEndpoint_Std_t; + + /** \brief Audio class-specific Streaming Endpoint Descriptor (USB-IF naming conventions). + * + * 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. + * + * \see \ref USB_Audio_Descriptor_StreamEndpoint_Std_t for the version of this type with non-standard LUFA specific + * element names. + */ + typedef struct + { + uint8_t bLength; /**< Size of the descriptor, in bytes. */ + uint8_t bDescriptorType; /**< Type of the descriptor, either a value in \ref USB_DescriptorTypes_t or a + * value given by the specific class. + */ + uint8_t bEndpointAddress; /**< Logical address of the endpoint within the device for the current + * configuration, including direction mask. + */ + uint8_t bmAttributes; /**< Endpoint attributes, comprised of a mask of the endpoint type (EP_TYPE_*) + * and attributes (ENDPOINT_ATTR_*) masks. + */ + uint16_t wMaxPacketSize; /**< Size of the endpoint bank, in bytes. This indicates the maximum packet size + * that the endpoint can receive at a time. + */ + uint8_t bInterval; /**< Polling interval in milliseconds for the endpoint if it is an INTERRUPT or + * ISOCHRONOUS type. + */ + + uint8_t bRefresh; /**< Always set to zero for Audio class devices. */ + uint8_t bSynchAddress; /**< Endpoint address to send synchronization information to, if needed (zero otherwise). */ + } USB_Audio_StdDescriptor_StreamEndpoint_Std_t; + + /** \brief Audio class-specific Extended Endpoint Descriptor (LUFA naming conventions). + * + * 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. + * + * \see \ref USB_Audio_StdDescriptor_StreamEndpoint_Spc_t for the version of this type with standard element names. + */ + 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, + * a value from the \ref Audio_CSEndpoint_SubTypes_t enum. + */ + + 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_Descriptor_StreamEndpoint_Spc_t; + + /** \brief Audio class-specific Extended Endpoint Descriptor (USB-IF naming conventions). + * + * 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. + * + * \see \ref USB_Audio_Descriptor_StreamEndpoint_Spc_t for the version of this type with non-standard LUFA specific + * element names. + */ + typedef struct + { + uint8_t bLength; /**< Size of the descriptor, in bytes. */ + uint8_t bDescriptorType; /**< Type of the descriptor, either a value in \ref USB_DescriptorTypes_t or a value + * given by the specific class. + */ + + uint8_t bDescriptorSubtype; /**< Sub type value used to distinguish between audio class-specific descriptors, + * a value from the \ref Audio_CSEndpoint_SubTypes_t enum. + */ + + uint8_t bmAttributes; /**< Audio class-specific endpoint attributes, such as ACCEPTS_SMALL_PACKETS. */ + + uint8_t bLockDelayUnits; /**< Units used for the LockDelay field, see Audio class specification. */ + uint16_t wLockDelay; /**< Time required to internally lock endpoint's internal clock recovery circuitry. */ + } USB_Audio_StdDescriptor_StreamEndpoint_Spc_t; + + /* Disable C linkage for C++ Compilers: */ + #if defined(__cplusplus) + } + #endif + +#endif + +/** @} */ +