gb-emu/lib/src/connect/mod.rs

pub use crate::processor::memory::mmio::joypad::JoypadState;
use async_ringbuf::{AsyncHeapConsumer, AsyncHeapProducer, AsyncHeapRb};
use futures::executor;

pub enum EmulatorMessage {
    Stop,
}

pub enum RomFile {
    Path(String),
    Raw(Vec<u8>),
}

pub trait Renderer: Send + Sync {
    fn prepare(&mut self, width: usize, height: usize);

    fn display(&mut self, buffer: &[u32]);

    fn set_title(&mut self, _title: String) {}

    fn latest_joypad_state(&mut self) -> JoypadState;

    fn set_rumble(&mut self, _rumbling: bool) {}
}

pub struct AudioOutput {
    pub sample_rate: f32,
    pub send_rb: AsyncHeapProducer<[f32; 2]>,
}

impl AudioOutput {
    pub fn new(sample_rate: f32) -> (Self, AsyncHeapConsumer<[f32; 2]>) {
        let (mut output, rx) = Self::new_unfilled(sample_rate);

        executor::block_on(
            output
                .send_rb
                .push_iter(vec![[0.; 2]; output.send_rb.len() - 1].into_iter()),
        )
        .unwrap();

        (output, rx)
    }

    pub fn new_unfilled(sample_rate: f32) -> (Self, AsyncHeapConsumer<[f32; 2]>) {
        let rb_len = sample_rate as usize / (60 * 2);

        let rb = AsyncHeapRb::<[f32; 2]>::new(rb_len);
        let (send_rb, rx) = rb.split();

        (
            Self {
                sample_rate,
                send_rb,
            },
            rx,
        )
    }
}