play_audio_v01.rs

use mlua::prelude::*;
use std::fs::File;
use std::io::BufReader;
use rodio::{Decoder, OutputStream, Sink};
use std::time::Duration;
use futures_timer::Delay;

async fn play_local_file(lua: &Lua, (filepath, volume, duration): (String, f32, u64)) -> LuaResult<()> {
    let (_stream, stream_handle) = OutputStream::try_default().unwrap();
    let sink = Sink::try_new(&stream_handle).unwrap();
    sink.set_volume(volume);
    let file = BufReader::new(File::open(filepath).unwrap());
    let source = Decoder::new(file).unwrap();
    sink.append(source);
    Delay::new(Duration::from_millis(duration)).await;
    Ok(())
}

#[tokio::main]
#[mlua::lua_module]
async fn lua_audio(lua: &Lua) -> LuaResult<LuaTable> {
    let exports = lua.create_table()?;
    exports.set("play_from_file", lua.create_async_function(play_local_file)?)?;
    Ok(exports)
}

#[mlua::lua_module]
fn rust_module_error(_: &Lua) -> LuaResult<LuaTable> {
    Err("custom module error".to_lua_err())
}