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jzlv
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7
components/usb_stack/class/audio/usbd_audio.c
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components/usb_stack/class/audio/usbd_audio.c
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#include "usbd_core.h"
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#include "usbd_audio.h"
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int audio_class_request_handler(struct usb_setup_packet *setup, uint8_t **data, uint32_t *len)
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{
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return 0;
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}
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components/usb_stack/class/audio/usbd_audio.h
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components/usb_stack/class/audio/usbd_audio.h
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/**
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* @file
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* @brief USB Audio Device Class public header
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*
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* Header follows below documentation:
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* - USB Device Class Definition for Audio Devices (audio10.pdf)
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*
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* Additional documentation considered a part of USB Audio v1.0:
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* - USB Device Class Definition for Audio Data Formats (frmts10.pdf)
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* - USB Device Class Definition for Terminal Types (termt10.pdf)
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*/
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#ifndef _USBD_AUDIO_H_
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#define _USBD_AUDIO_H_
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#ifdef __cplusplus
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extern "C" {
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#endif
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/** Audio Interface Subclass Codes
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* Refer to Table A-2 from audio10.pdf
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*/
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enum usb_audio_int_subclass_codes {
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USB_AUDIO_SUBCLASS_UNDEFINED = 0x00,
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USB_AUDIO_AUDIOCONTROL = 0x01,
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USB_AUDIO_AUDIOSTREAMING = 0x02,
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USB_AUDIO_MIDISTREAMING = 0x03
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};
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/** Audio Class-Specific AC Interface Descriptor Subtypes
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* Refer to Table A-5 from audio10.pdf
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*/
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enum usb_audio_cs_ac_int_desc_subtypes {
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USB_AUDIO_AC_DESCRIPTOR_UNDEFINED = 0x00,
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USB_AUDIO_HEADER = 0x01,
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USB_AUDIO_INPUT_TERMINAL = 0x02,
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USB_AUDIO_OUTPUT_TERMINAL = 0x03,
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USB_AUDIO_MIXER_UNIT = 0x04,
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USB_AUDIO_SELECTOR_UNIT = 0x05,
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USB_AUDIO_FEATURE_UNIT = 0x06,
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USB_AUDIO_PROCESSING_UNIT = 0x07,
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USB_AUDIO_EXTENSION_UNIT = 0x08
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};
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/** Audio Class-Specific AS Interface Descriptor Subtypes
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* Refer to Table A-6 from audio10.pdf
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*/
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enum usb_audio_cs_as_int_desc_subtypes {
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USB_AUDIO_AS_DESCRIPTOR_UNDEFINED = 0x00,
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USB_AUDIO_AS_GENERAL = 0x01,
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USB_AUDIO_FORMAT_TYPE = 0x02,
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USB_AUDIO_FORMAT_SPECIFIC = 0x03
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};
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/** Audio Class-Specific Request Codes
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* Refer to Table A-9 from audio10.pdf
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*/
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enum usb_audio_cs_req_codes {
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USB_AUDIO_REQUEST_CODE_UNDEFINED = 0x00,
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USB_AUDIO_SET_CUR = 0x01,
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USB_AUDIO_GET_CUR = 0x81,
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USB_AUDIO_SET_MIN = 0x02,
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USB_AUDIO_GET_MIN = 0x82,
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USB_AUDIO_SET_MAX = 0x03,
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USB_AUDIO_GET_MAX = 0x83,
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USB_AUDIO_SET_RES = 0x04,
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USB_AUDIO_GET_RES = 0x84,
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USB_AUDIO_SET_MEM = 0x05,
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USB_AUDIO_GET_MEM = 0x85,
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USB_AUDIO_GET_STAT = 0xFF
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};
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/** Feature Unit Control Selectors
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* Refer to Table A-11 from audio10.pdf
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*/
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enum usb_audio_fucs {
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USB_AUDIO_FU_CONTROL_UNDEFINED = 0x00,
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USB_AUDIO_FU_MUTE_CONTROL = 0x01,
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USB_AUDIO_FU_VOLUME_CONTROL = 0x02,
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USB_AUDIO_FU_BASS_CONTROL = 0x03,
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USB_AUDIO_FU_MID_CONTROL = 0x04,
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USB_AUDIO_FU_TREBLE_CONTROL = 0x05,
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USB_AUDIO_FU_GRAPHIC_EQUALIZER_CONTROL = 0x06,
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USB_AUDIO_FU_AUTOMATIC_GAIN_CONTROL = 0x07,
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USB_AUDIO_FU_DELAY_CONTROL = 0x08,
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USB_AUDIO_FU_BASS_BOOST_CONTROL = 0x09,
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USB_AUDIO_FU_LOUDNESS_CONTROL = 0x0A
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};
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/** USB Terminal Types
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* Refer to Table 2-1 - Table 2-4 from termt10.pdf
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*/
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enum usb_audio_terminal_types {
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/* USB Terminal Types */
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USB_AUDIO_USB_UNDEFINED = 0x0100,
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USB_AUDIO_USB_STREAMING = 0x0101,
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USB_AUDIO_USB_VENDOR_SPEC = 0x01FF,
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/* Input Terminal Types */
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USB_AUDIO_IN_UNDEFINED = 0x0200,
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USB_AUDIO_IN_MICROPHONE = 0x0201,
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USB_AUDIO_IN_DESKTOP_MIC = 0x0202,
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USB_AUDIO_IN_PERSONAL_MIC = 0x0203,
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USB_AUDIO_IN_OM_DIR_MIC = 0x0204,
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USB_AUDIO_IN_MIC_ARRAY = 0x0205,
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USB_AUDIO_IN_PROC_MIC_ARRAY = 0x0205,
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/* Output Terminal Types */
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USB_AUDIO_OUT_UNDEFINED = 0x0300,
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USB_AUDIO_OUT_SPEAKER = 0x0301,
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USB_AUDIO_OUT_HEADPHONES = 0x0302,
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USB_AUDIO_OUT_HEAD_AUDIO = 0x0303,
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USB_AUDIO_OUT_DESKTOP_SPEAKER = 0x0304,
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USB_AUDIO_OUT_ROOM_SPEAKER = 0x0305,
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USB_AUDIO_OUT_COMM_SPEAKER = 0x0306,
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USB_AUDIO_OUT_LOW_FREQ_SPEAKER = 0x0307,
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/* Bi-directional Terminal Types */
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USB_AUDIO_IO_UNDEFINED = 0x0400,
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USB_AUDIO_IO_HANDSET = 0x0401,
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USB_AUDIO_IO_HEADSET = 0x0402,
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USB_AUDIO_IO_SPEAKERPHONE_ECHO_NONE = 0x0403,
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USB_AUDIO_IO_SPEAKERPHONE_ECHO_SUP = 0x0404,
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USB_AUDIO_IO_SPEAKERPHONE_ECHO_CAN = 0x0405,
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};
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enum usb_audio_direction {
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USB_AUDIO_IN = 0x00,
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USB_AUDIO_OUT = 0x01
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};
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/**
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* Addressable logical object inside an audio function.
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* Entity is one of: Terminal or Unit.
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* Refer to 1.4 Terms and Abbreviations from audio10.pdf
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*/
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struct usb_audio_entity {
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enum usb_audio_cs_ac_int_desc_subtypes subtype;
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uint8_t id;
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};
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/**
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* @warning Size of baInterface is 2 just to make it useable
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* for all kind of devices: headphones, microphone and headset.
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* Actual size of the struct should be checked by reading
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* .bLength.
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*/
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struct cs_ac_if_descriptor {
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uint8_t bLength;
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uint8_t bDescriptorType;
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uint8_t bDescriptorSubtype;
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uint16_t bcdADC;
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uint16_t wTotalLength;
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uint8_t bInCollection;
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uint8_t baInterfaceNr[2];
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} __packed;
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struct input_terminal_descriptor {
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uint8_t bLength;
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uint8_t bDescriptorType;
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uint8_t bDescriptorSubtype;
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uint8_t bTerminalID;
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uint16_t wTerminalType;
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uint8_t bAssocTerminal;
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uint8_t bNrChannels;
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uint16_t wChannelConfig;
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uint8_t iChannelNames;
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uint8_t iTerminal;
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} __packed;
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/**
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* @note Size of Feature unit descriptor is not fixed.
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* This structure is just a helper not a common type.
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*/
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struct feature_unit_descriptor {
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uint8_t bLength;
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uint8_t bDescriptorType;
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uint8_t bDescriptorSubtype;
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uint8_t bUnitID;
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uint8_t bSourceID;
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uint8_t bControlSize;
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uint16_t bmaControls[1];
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} __packed;
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struct output_terminal_descriptor {
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uint8_t bLength;
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uint8_t bDescriptorType;
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uint8_t bDescriptorSubtype;
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uint8_t bTerminalID;
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uint16_t wTerminalType;
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uint8_t bAssocTerminal;
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uint8_t bSourceID;
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uint8_t iTerminal;
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} __packed;
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struct as_cs_interface_descriptor {
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uint8_t bLength;
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uint8_t bDescriptorType;
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uint8_t bDescriptorSubtype;
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uint8_t bTerminalLink;
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uint8_t bDelay;
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uint16_t wFormatTag;
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} __packed;
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struct format_type_i_descriptor {
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uint8_t bLength;
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uint8_t bDescriptorType;
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uint8_t bDescriptorSubtype;
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uint8_t bFormatType;
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uint8_t bNrChannels;
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uint8_t bSubframeSize;
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uint8_t bBitResolution;
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uint8_t bSamFreqType;
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uint8_t tSamFreq[3];
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} __packed;
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struct std_as_ad_endpoint_descriptor {
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uint8_t bLength;
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uint8_t bDescriptorType;
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uint8_t bEndpointAddress;
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uint8_t bmAttributes;
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uint16_t wMaxPacketSize;
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uint8_t bInterval;
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uint8_t bRefresh;
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uint8_t bSynchAddress;
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} __packed;
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struct cs_as_ad_ep_descriptor {
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uint8_t bLength;
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uint8_t bDescriptorType;
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uint8_t bDescriptorSubtype;
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uint8_t bmAttributes;
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uint8_t bLockDelayUnits;
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uint16_t wLockDelay;
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} __packed;
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#ifdef __cplusplus
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}
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#endif
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#endif /* _USB_AUDIO_H_ */
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