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use std::error::Error;
use std::io::{stdin, stdout, Write};
use midir::{Ignore, MidiInput};
fn main() {
match run() {
Ok(_) => (),
Err(err) => println!("Error: {}", err),
}
}
fn run() -> Result<(), Box<dyn Error>> {
let mut input = String::new();
let mut midi_in = MidiInput::new("midir reading input")?;
midi_in.ignore(Ignore::None);
// Get an input port (read from console if multiple are available)
let in_ports = midi_in.ports();
let in_port = match in_ports.len() {
0 => return Err("no input port found".into()),
1 => {
println!(
"Choosing the only available input port: {}",
midi_in.port_name(&in_ports[0]).unwrap()
);
&in_ports[0]
}
_ => {
println!("\nAvailable input ports:");
for (i, p) in in_ports.iter().enumerate() {
println!("{}: {}", i, midi_in.port_name(p).unwrap());
}
print!("Please select input port: ");
stdout().flush()?;
let mut input = String::new();
stdin().read_line(&mut input)?;
in_ports
.get(input.trim().parse::<usize>()?)
.ok_or("invalid input port selected")?
}
};
println!("\nOpening connection");
let in_port_name = midi_in.port_name(in_port)?;
// _conn_in needs to be a named parameter, because it needs to be kept alive until the end of the scope
let _conn_in = midi_in.connect(
in_port,
"midir-read-input",
move |stamp, message, _| {
println!("{}: {:?} (len = {})", stamp, message, message.len());
},
(),
)?;
println!(
"Connection open, reading input from '{}' (press enter to exit) ...",
in_port_name
);
input.clear();
stdin().read_line(&mut input)?; // wait for next enter key press
println!("Closing connection");
Ok(())
}
|
