diff options
Diffstat (limited to 'lib/lufa/LUFA/Drivers/USB/Class/Common/AudioClassCommon.h')
| -rw-r--r-- | lib/lufa/LUFA/Drivers/USB/Class/Common/AudioClassCommon.h | 780 |
1 files changed, 780 insertions, 0 deletions
diff --git a/lib/lufa/LUFA/Drivers/USB/Class/Common/AudioClassCommon.h b/lib/lufa/LUFA/Drivers/USB/Class/Common/AudioClassCommon.h new file mode 100644 index 0000000000..46ecd08587 --- /dev/null +++ b/lib/lufa/LUFA/Drivers/USB/Class/Common/AudioClassCommon.h @@ -0,0 +1,780 @@ +/* + LUFA Library + Copyright (C) Dean Camera, 2017. + + dean [at] fourwalledcubicle [dot] com + www.lufa-lib.org +*/ + +/* + Copyright 2017 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 disclaims 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 USB module driver + * dispatch header located in LUFA/Drivers/USB.h. + */ + +/** \ingroup Group_USBClassAudio + * \defgroup Group_USBClassAudioCommon Common Class Definitions + * + * \section Sec_USBClassAudioCommon_ModDescription 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 "../../Core/StdDescriptors.h" + + /* 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/USB.h instead. + #endif + + /* Macros: */ + /** \name Audio Channel Masks */ + //@{ + /** 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) + //@} + + /** \name Audio Feature Masks */ + //@{ + /** 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) + //@} + + /** \name Audio Terminal Types */ + //@{ + /** 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) {.Byte1 = ((uint32_t)freq & 0xFF), .Byte2 = (((uint32_t)freq >> 8) & 0xFF), .Byte3 = (((uint32_t)freq >> 16) & 0xFF)} + + /** 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) + + /** Mask for the attributes parameter of an Audio class-specific Endpoint descriptor, indicating that the endpoint + * allows for sampling frequency adjustments to be made via control requests directed at the endpoint. + */ + #define AUDIO_EP_SAMPLE_FREQ_CONTROL (1 << 0) + + /** Mask for the attributes parameter of an Audio class-specific Endpoint descriptor, indicating that the endpoint + * allows for pitch adjustments to be made via control requests directed at the endpoint. + */ + #define AUDIO_EP_PITCH_CONTROL (1 << 1) + + /* Enums: */ + /** Enum for possible Class, Subclass and Protocol values of device and interface descriptors relating to the Audio + * device class. + */ + enum Audio_Descriptor_ClassSubclassProtocol_t + { + AUDIO_CSCP_AudioClass = 0x01, /**< Descriptor Class value indicating that the device or + * interface belongs to the USB Audio 1.0 class. + */ + AUDIO_CSCP_ControlSubclass = 0x01, /**< Descriptor Subclass value indicating that the device or + * interface belongs to the Audio Control subclass. + */ + AUDIO_CSCP_ControlProtocol = 0x00, /**< Descriptor Protocol value indicating that the device or + * interface belongs to the Audio Control protocol. + */ + AUDIO_CSCP_AudioStreamingSubclass = 0x02, /**< Descriptor Subclass value indicating that the device or + * interface belongs to the MIDI Streaming subclass. + */ + AUDIO_CSCP_MIDIStreamingSubclass = 0x03, /**< Descriptor Subclass value indicating that the device or + * interface belongs to the Audio streaming subclass. + */ + AUDIO_CSCP_StreamingProtocol = 0x00, /**< Descriptor Protocol value indicating that the device or + * interface belongs to the Streaming Audio protocol. + */ + }; + + /** 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. */ + }; + + /** Enum for the Audio class specific control requests that can be issued by the USB bus host. */ + enum Audio_ClassRequests_t + { + AUDIO_REQ_SetCurrent = 0x01, /**< Audio class-specific request to set the current value of a parameter within the device. */ + AUDIO_REQ_SetMinimum = 0x02, /**< Audio class-specific request to set the minimum value of a parameter within the device. */ + AUDIO_REQ_SetMaximum = 0x03, /**< Audio class-specific request to set the maximum value of a parameter within the device. */ + AUDIO_REQ_SetResolution = 0x04, /**< Audio class-specific request to set the resolution value of a parameter within the device. */ + AUDIO_REQ_SetMemory = 0x05, /**< Audio class-specific request to set the memory value of a parameter within the device. */ + AUDIO_REQ_GetCurrent = 0x81, /**< Audio class-specific request to get the current value of a parameter within the device. */ + AUDIO_REQ_GetMinimum = 0x82, /**< Audio class-specific request to get the minimum value of a parameter within the device. */ + AUDIO_REQ_GetMaximum = 0x83, /**< Audio class-specific request to get the maximum value of a parameter within the device. */ + AUDIO_REQ_GetResolution = 0x84, /**< Audio class-specific request to get the resolution value of a parameter within the device. */ + AUDIO_REQ_GetMemory = 0x85, /**< Audio class-specific request to get the memory value of a parameter within the device. */ + AUDIO_REQ_GetStatus = 0xFF, /**< Audio class-specific request to get the device status. */ + }; + + /** Enum for Audio class specific Endpoint control modifiers which can be set and retrieved by a USB host, if the corresponding + * endpoint control is indicated to be supported in the Endpoint's Audio-class specific endpoint descriptor. + */ + enum Audio_EndpointControls_t + { + AUDIO_EPCONTROL_SamplingFreq = 0x01, /**< Sampling frequency adjustment of the endpoint. */ + AUDIO_EPCONTROL_Pitch = 0x02, /**< Pitch adjustment of the endpoint. */ + }; + + /* 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. + * + * \note Regardless of CPU architecture, these values should be stored as little endian. + */ + 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 \c 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; /**< \c 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. */ + } ATTR_PACKED 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. + * + * \note Regardless of CPU architecture, these values should be stored as little endian. + */ + 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 \c 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; /**< \c 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. */ + } ATTR_PACKED 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. + * + * \note Regardless of CPU architecture, these values should be stored as little endian. + */ + 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 \c 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. */ + } ATTR_PACKED 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. + * + * \note Regardless of CPU architecture, these values should be stored as little endian. + */ + 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 \c 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. */ + } ATTR_PACKED 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. + * + * \note Regardless of CPU architecture, these values should be stored as little endian. + */ + 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. + * + * \see \ref VERSION_BCD() utility macro. + */ + 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. */ + } ATTR_PACKED 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. + * + * \note Regardless of CPU architecture, these values should be stored as little endian. + */ + 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. + * + * \see \ref VERSION_BCD() utility macro. + */ + 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. */ + } ATTR_PACKED 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. + * + * \note Regardless of CPU architecture, these values should be stored as little endian. + */ + 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 \c ChannelControls 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. */ + } ATTR_PACKED 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. + * + * \note Regardless of CPU architecture, these values should be stored as little endian. + */ + 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 \c ChannelControls 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. */ + } ATTR_PACKED 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. + * + * \note Regardless of CPU architecture, these values should be stored as little endian. + */ + 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. */ + } ATTR_PACKED 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. + * + * \note Regardless of CPU architecture, these values should be stored as little endian. + */ + 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. */ + } ATTR_PACKED USB_Audio_StdDescriptor_Interface_AS_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. + * + * \attention This descriptor <b>must</b> be followed by one or more \ref USB_Audio_SampleFreq_t elements containing + * the continuous or discrete sample frequencies. + * + * \see \ref USB_Audio_StdDescriptor_Format_t for the version of this type with standard element names. + * + * \note Regardless of CPU architecture, these values should be stored as little endian. + */ + 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 TotalDiscreteSampleRates; /**< Total number of discrete sample frequencies supported by the device. When + * zero, this must be followed by the lower and upper continuous sampling + * frequencies supported by the device; otherwise, this must be followed + * by the given number of discrete sampling frequencies supported. + */ + } ATTR_PACKED USB_Audio_Descriptor_Format_t; + + /** \brief 24-Bit Audio Frequency Structure. + * + * Type define for a 24-bit audio sample frequency structure. As GCC does not contain a built in 24-bit datatype, + * this this structure is used to build up the value instead. Fill this structure with the \ref AUDIO_SAMPLE_FREQ() macro. + * + * \note Regardless of CPU architecture, these values should be stored as little endian. + */ + typedef struct + { + uint8_t Byte1; /**< Lowest 8 bits of the 24-bit value. */ + uint8_t Byte2; /**< Middle 8 bits of the 24-bit value. */ + uint8_t Byte3; /**< Upper 8 bits of the 24-bit value. */ + } ATTR_PACKED USB_Audio_SampleFreq_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. + * + * \attention This descriptor <b>must</b> be followed by one or more 24-bit integer elements containing the continuous + * or discrete sample frequencies. + * + * \see \ref USB_Audio_Descriptor_Format_t for the version of this type with non-standard LUFA specific + * element names. + * + * \note Regardless of CPU architecture, these values should be stored as little endian. + */ + 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. When + * zero, this must be followed by the lower and upper continuous sampling + * frequencies supported by the device; otherwise, this must be followed + * by the given number of discrete sampling frequencies supported. + */ + } ATTR_PACKED 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. + * + * \note Regardless of CPU architecture, these values should be stored as little endian. + */ + 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). */ + } ATTR_PACKED 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. + * + * \note Regardless of CPU architecture, these values should be stored as little endian. + */ + 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 (\c EP_TYPE_*) + * and attributes (\c 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). */ + } ATTR_PACKED 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. + * + * \note Regardless of CPU architecture, these values should be stored as little endian. + */ + 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 \ref AUDIO_EP_FULL_PACKETS_ONLY. */ + + 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. */ + } ATTR_PACKED 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. + * + * \note Regardless of CPU architecture, these values should be stored as little endian. + */ + 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 \ref AUDIO_EP_FULL_PACKETS_ONLY. */ + + 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. */ + } ATTR_PACKED USB_Audio_StdDescriptor_StreamEndpoint_Spc_t; + + /* Disable C linkage for C++ Compilers: */ + #if defined(__cplusplus) + } + #endif + +#endif + +/** @} */ + |