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Description
I have a small midir based programme to read events from a MIDI pedal.
I compare the performance of this to aseqdump, which is working.
When I run this midir programme, and press the pedal buttons, I see nothing. Then I shut the programme down, and restart it, and I see the events. None more are detected.
Using aseqdump I see the events as they occur.
The little midir programme. I cannot see anything I have done incorrectly.
use midir::MidiIO;
use midir::MidiInput;
use std::env::args;
use std::error::Error;
use std::io::stdin;
use std::iter::zip;
fn main() {
let port_name_in: String = args().nth(1).unwrap();
run(port_name_in).unwrap();
}
fn run(name_of_port_in: String) -> Result<(), Box<dyn Error>> {
handle_input(name_of_port_in.as_str()).unwrap();
let mut input = String::new();
println!("Running....");
stdin().read_line(&mut input)?; // wait for next enter key press
println!("Closing connection");
Ok(())
}
fn find_port<T: MidiIO>(name: &str, midi_io: &T) -> Result<T::Port, Box<dyn Error>> {
let ports = midi_io.ports();
let port_names: Vec<String> = ports
.iter()
.map(|p| midi_io.port_name(p).unwrap())
.collect();
let mut names_ports = zip(ports, port_names);
let port_name = names_ports
.find(|x| &x.1 == name)
.expect(format!("{} not found", name).as_str());
Ok(port_name.0)
}
fn handle_input(port_name: &str) -> Result<(), Box<dyn Error>> {
let midi_input = MidiInput::new("120Proof-midi-pedal-driver")?;
let input_port = match find_port(port_name, &midi_input) {
Ok(p) => p,
Err(err) => panic!("Failed to bet port {port_name}: {err}"),
};
let _ = midi_input.connect(
&input_port,
"midir-read-input",
move |stamp, message, _| {
println!("{}: {:?} (len = {})", stamp, message, message.len());
},
(),
)?;
Ok(())
}Metadata
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