dranke/microw8
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implement backchannel from audio thread

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This commit is contained in:
Dennis Ranke
2022-04-22 00:28:19 +02:00
parent df0c169d54
commit e05701300c
4 changed files with 48 additions and 6 deletions
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28
src/run_native.rs
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@@ -91,6 +91,7 @@ impl MicroW8 {
struct Uw8Sound {
stream: cpal::Stream,
tx: mpsc::SyncSender<[u8; 32]>,
rx: mpsc::Receiver<[u8; 32]>,
}
impl super::Runtime for MicroW8 {
@@ -260,15 +261,27 @@ impl super::Runtime for MicroW8 {
};
let (tx, rx) = mpsc::sync_channel::<[u8; 32]>(1);
let (back_tx, back_rx) = mpsc::sync_channel::<[u8; 32]>(2);
let start_time = Instant::now();
let mut sample_index = 0;
let stream = {
device.build_output_stream(
&config,
move |buffer: &mut [f32], _| {
if let Ok(regs) = rx.try_recv() {
if let Ok(mut regs) = rx.try_recv() {
memory.write(&mut store, 80, &regs).unwrap();
memory.read(&mut store, 0x12c80, &mut regs).unwrap();
back_tx.send(regs).unwrap();
}
{
let time = start_time.elapsed().as_millis() as i32;
let mem = memory.data_mut(&mut store);
mem[64..68].copy_from_slice(&time.to_le_bytes());
}
for v in buffer {
*v = snd.call(&mut store, (sample_index,)).unwrap_or(0.0);
sample_index = sample_index.wrapping_add(1);
@@ -280,7 +293,11 @@ impl super::Runtime for MicroW8 {
)?
};
Uw8Sound { stream, tx }
Uw8Sound {
stream,
tx,
rx: back_rx,
}
};
sound.stream.play()?;
@@ -302,6 +319,13 @@ impl super::Runtime for MicroW8 {
fn run_frame(&mut self) -> Result<()> {
let mut result = Ok(());
if let Some(mut instance) = self.instance.take() {
while let Ok(regs) = instance.sound.rx.try_recv() {
instance
.memory
.write(&mut instance.store, 0x12c80, &regs)
.unwrap();
}
{
let time = instance.start_time.elapsed().as_millis() as i32;
let mut gamepad: u32 = 0;