Crate usbd_audio

USB Audio class

This crate provides a USB device class based on “Universal Serial Bus Device Class Definition for Audio Devices”, Release 1.0 (experimental implementation without the aim of standard compliance).

Since the USB descriptor can be quite large, it may be required to activate the feature control-buffer-256 of the usb-device crate.

Example

let mut usb_bus = ... // create a UsbBusAllocator in a platform specific way

let mut usb_audio = AudioClassBuilder::new()
    .input(
        StreamConfig::new_discrete(
            Format::S16le,
            1,
            &[48000],
            TerminalType::InMicrophone).unwrap())
    .output(
        StreamConfig::new_discrete(
            Format::S24le,
            2,
            &[44100, 48000, 96000],
            TerminalType::OutSpeaker).unwrap())
    .build(&usb_bus)
    .unwrap();

This example creates an audio device having a one channel (Mono) microphone with a fixed sampling frequency of 48 KHz and a two channel (Stereo) speaker output that supports three different sampling rates.

Structs

AudioClass

USB device class for audio devices.

AudioClassBuilder

Builder class to create an AudioClass structure.

StreamConfig

Enums

Error

USB audio errors, including possible USB Stack errors

Format

Rates

Sampling rates that shall be supported by an steaming endpoint

TerminalType

USB Audio Terminal Types from “Universal Serial Bus Device Class Definition for Terminal Types, Release 1.0”