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extern crate midir;
use std::thread::sleep;
use std::time::Duration;
use std::io::{stdin, stdout, Write};
use std::error::Error;
use midir::{MidiInput, MidiOutput, Ignore};
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("My Test Input")?;
midi_in.ignore(Ignore::None);
let mut midi_out = MidiOutput::new("My Test Output")?;
println!("Available input ports:");
let midi_in_ports = midi_in.ports();
for (i, p) in midi_in_ports.iter().enumerate() {
println!("{}: {}", i, midi_in.port_name(p)?);
}
print!("Please select input port: ");
stdout().flush()?;
stdin().read_line(&mut input)?;
let in_port = midi_in_ports.get(input.trim().parse::<usize>()?)
.ok_or("Invalid port number")?;
println!("\nAvailable output ports:");
let midi_out_ports = midi_out.ports();
for (i, p) in midi_out_ports.iter().enumerate() {
println!("{}: {}", i, midi_out.port_name(p)?);
}
print!("Please select output port: ");
stdout().flush()?;
input.clear();
stdin().read_line(&mut input)?;
let out_port = midi_out_ports.get(input.trim().parse::<usize>()?)
.ok_or("Invalid port number")?;
// This shows how to reuse input and output objects:
// Open/close the connections twice using the same MidiInput/MidiOutput objects
for _ in 0..2 {
println!("\nOpening connections");
let log_all_bytes = Vec::new(); // We use this as an example custom data to pass into the callback
let conn_in = midi_in.connect(in_port, "midir-test", |stamp, message, log| {
// The last of the three callback parameters is the object that we pass in as last parameter of `connect`.
println!("{}: {:?} (len = {})", stamp, message, message.len());
log.extend_from_slice(message);
}, log_all_bytes)?;
// One could get the log back here out of the error
let mut conn_out = midi_out.connect(out_port, "midir-test")?;
println!("Connections open, enter `q` to exit ...");
loop {
input.clear();
stdin().read_line(&mut input)?;
if input.trim() == "q" {
break;
} else {
conn_out.send(&[144, 60, 1])?;
sleep(Duration::from_millis(200));
conn_out.send(&[144, 60, 0])?;
}
}
println!("Closing connections");
let (midi_in_, log_all_bytes) = conn_in.close();
midi_in = midi_in_;
midi_out = conn_out.close();
println!("Connections closed");
println!("Received bytes: {:?}", log_all_bytes);
}
Ok(())
}