Snapshot of the attached audio device, passed to the attach callback. More...

#include <ra8_usb_haud.h>

Data Fields
uint8_t	device_address
	Assigned USB address (1..127).
uint8_t	ac_interface
	AudioControl bInterfaceNumber.
uint8_t	as_interface
	AudioStreaming bInterfaceNumber.
uint8_t	feature_unit_id
	Feature Unit bUnitID (for FU controls).
uint8_t	iso_in_ep
	iso-IN EP num (0 if absent).
uint8_t	iso_out_ep
	iso-OUT EP num (0 if absent).
uint8_t	channel_count
	bNrChannels from FORMAT_TYPE_I desc.
uint8_t	bits_per_sample
	bBitResolution from FORMAT_TYPE_I.
uint16_t	iso_in_max_packet
	iso-IN wMaxPacketSize.
uint16_t	iso_out_max_packet
	iso-OUT wMaxPacketSize.
uint16_t	vendor_id
	idVendor from device descriptor.
uint16_t	product_id
	idProduct from device descriptor.
uint32_t	sample_rate_min_hz
	Minimum tSamFreq from FORMAT_TYPE_I.
uint32_t	sample_rate_max_hz
	Maximum tSamFreq from FORMAT_TYPE_I.

Detailed Description

Snapshot of the attached audio device, passed to the attach callback.

Populated by the host-Audio driver once the descriptor walk completes. The pipe number is the controller-side handle wired up against the attached device's isochronous endpoints. The recipient should hold onto this struct (or copy it) so subsequent format / volume / mute calls land on the right Feature Unit.

Definition at line 260 of file ra8_usb_haud.h.

Field Documentation

◆ ac_interface

uint8_t ra8_usb_haud_device_t::ac_interface

AudioControl bInterfaceNumber.

Definition at line 262 of file ra8_usb_haud.h.

◆ as_interface

uint8_t ra8_usb_haud_device_t::as_interface

AudioStreaming bInterfaceNumber.

Definition at line 263 of file ra8_usb_haud.h.

◆ bits_per_sample

uint8_t ra8_usb_haud_device_t::bits_per_sample

bBitResolution from FORMAT_TYPE_I.

Definition at line 268 of file ra8_usb_haud.h.

◆ channel_count

uint8_t ra8_usb_haud_device_t::channel_count

bNrChannels from FORMAT_TYPE_I desc.

Definition at line 267 of file ra8_usb_haud.h.

◆ device_address

uint8_t ra8_usb_haud_device_t::device_address

Assigned USB address (1..127).

Definition at line 261 of file ra8_usb_haud.h.

◆ feature_unit_id

uint8_t ra8_usb_haud_device_t::feature_unit_id

Feature Unit bUnitID (for FU controls).

Definition at line 264 of file ra8_usb_haud.h.

◆ iso_in_ep

uint8_t ra8_usb_haud_device_t::iso_in_ep

iso-IN EP num (0 if absent).

Definition at line 265 of file ra8_usb_haud.h.

◆ iso_in_max_packet

uint16_t ra8_usb_haud_device_t::iso_in_max_packet

iso-IN wMaxPacketSize.

Definition at line 269 of file ra8_usb_haud.h.

◆ iso_out_ep

uint8_t ra8_usb_haud_device_t::iso_out_ep

iso-OUT EP num (0 if absent).

Definition at line 266 of file ra8_usb_haud.h.

◆ iso_out_max_packet

uint16_t ra8_usb_haud_device_t::iso_out_max_packet

iso-OUT wMaxPacketSize.

Definition at line 270 of file ra8_usb_haud.h.

◆ product_id

uint16_t ra8_usb_haud_device_t::product_id

idProduct from device descriptor.

Definition at line 272 of file ra8_usb_haud.h.

◆ sample_rate_max_hz

uint32_t ra8_usb_haud_device_t::sample_rate_max_hz

Maximum tSamFreq from FORMAT_TYPE_I.

Definition at line 274 of file ra8_usb_haud.h.

◆ sample_rate_min_hz

uint32_t ra8_usb_haud_device_t::sample_rate_min_hz

Minimum tSamFreq from FORMAT_TYPE_I.

Definition at line 273 of file ra8_usb_haud.h.

◆ vendor_id

uint16_t ra8_usb_haud_device_t::vendor_id

idVendor from device descriptor.

Definition at line 271 of file ra8_usb_haud.h.

The documentation for this struct was generated from the following file:

libs/ra8_hal/inc/ra8_usb_haud.h

Data Fields