Struct Speaker

pub struct Speaker<'d, D: Driver<'d>> { /* private fields */ }

Implementation of the USB audio class 1.0.

Implementations

impl<'d, D: Driver<'d>> Speaker<'d, D>

pub fn new( builder: &mut Builder<'d, D>, state: &'d mut State<'d>, max_packet_size: u16, resolution: SampleWidth, sample_rates_hz: &[u32], channels: &'d [Channel], feedback_refresh_period: FeedbackRefresh, ) -> (Stream<'d, D>, Feedback<'d, D>, ControlMonitor<'d>)

Creates a new Speaker device, split into a stream, feedback, and a control change notifier.

The packet size should be chosen, based on the expected transfer size of samples per (micro)frame. For example, a stereo stream at 32 bit resolution and 48 kHz sample rate yields packets of 384 byte for full-speed USB (1 ms frame interval) or 48 byte for high-speed USB (125 us microframe interval). When using feedback, the packet size varies and thus, the max_packet_size should be increased (e.g. to double).

Arguments

• builder - The builder for the class.
• state - The internal state of the class.
• max_packet_size - The maximum packet size per (micro)frame.
• resolution - The audio sample resolution.
• sample_rates_hz - The supported sample rates in Hz.
• channels - The advertised audio channels (up to 12). Entries must be unique, or this function panics.
• feedback_refresh_period - The refresh period for the feedback value.