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extern crate coremidi;
use std::env;
use std::thread;
use std::time::Duration;
fn main() {
let destination_index = get_destination_index();
println!("Destination index: {}", destination_index);
let destination = coremidi::Destination::from_index(destination_index).unwrap();
println!(
"Destination display name: {}",
destination.display_name().unwrap()
);
let client = coremidi::Client::new("Example Client").unwrap();
let output_port = client.output_port("Example Port").unwrap();
let note_on = create_note_on(0, 64, 127);
let note_off = create_note_off(0, 64, 127);
for i in 0..10 {
println!("[{}] Sending note ...", i);
output_port.send(&destination, ¬e_on).unwrap();
thread::sleep(Duration::from_millis(1000));
output_port.send(&destination, ¬e_off).unwrap();
}
}
fn get_destination_index() -> usize {
let mut args_iter = env::args();
let tool_name = args_iter
.next()
.and_then(|path| {
path.split(std::path::MAIN_SEPARATOR)
.last()
.map(|v| v.to_string())
})
.unwrap_or_else(|| "send".to_string());
match args_iter.next() {
Some(arg) => match arg.parse::<usize>() {
Ok(index) => {
if index >= coremidi::Destinations::count() {
println!("Destination index out of range: {}", index);
std::process::exit(-1);
}
index
}
Err(_) => {
println!("Wrong destination index: {}", arg);
std::process::exit(-1);
}
},
None => {
println!("Usage: {} <destination-index>", tool_name);
println!();
println!("Available Destinations:");
print_destinations();
std::process::exit(-1);
}
}
}
fn print_destinations() {
for (i, destination) in coremidi::Destinations.into_iter().enumerate() {
if let Some(display_name) = destination.display_name() {
println!("[{}] {}", i, display_name)
}
}
}
fn create_note_on(channel: u8, note: u8, velocity: u8) -> coremidi::PacketBuffer {
let data = &[0x90 | (channel & 0x0f), note & 0x7f, velocity & 0x7f];
coremidi::PacketBuffer::new(0, data)
}
fn create_note_off(channel: u8, note: u8, velocity: u8) -> coremidi::PacketBuffer {
let data = &[0x80 | (channel & 0x0f), note & 0x7f, velocity & 0x7f];
coremidi::PacketBuffer::new(0, data)
}