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Limit main loop and packet send rates

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LED data packets are now sent with at most 60 updates per second. The
main loop tries to uniformly distribute calculation updates over time.
This commit is contained in:
Thomas Kolb 2021-02-23 22:32:34 +01:00
parent 45475cb89d
commit a9202d8303
1 changed files with 31 additions and 9 deletions
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40
src/main.rs
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@ -17,6 +17,9 @@ use crate::udpproto::UdpProto;
use std::rc::Rc;
use std::cell::RefCell;
use std::thread::sleep;
use std::time::{Duration, Instant};
fn main()
{
let mut stdin = std::io::stdin();
@ -41,7 +44,7 @@ fn main()
println!("Loading user script...");
let mut script = match UserScript::new(sigproc.clone(), "test.lua") {
let mut script = match UserScript::new(sigproc.clone(), "particles.lua") {
Ok(script) => script,
Err(e) => {
println!("=== Lua Error ===\n{}\n====> Terminating.", e);
@ -61,6 +64,14 @@ fn main()
println!("Done! Starting main loop…");
// Timing setup
let block_period = Duration::from_nanos((0.95 * (config::SAMPLES_PER_UPDATE as f32) * 1e9 / config::SAMP_RATE) as u64);
let send_period = Duration::from_nanos(1000000000 / 60);
let mut next_block_instant = Instant::now() + block_period;
let mut next_send_instant = Instant::now() + send_period;
// array for samples directly read from stream
let mut samples: VecDeque<i16> = VecDeque::with_capacity(config::BLOCK_LEN);
@ -111,16 +122,27 @@ fn main()
// FIXME: only send with 60 FPS!
for i in 0..script.colorlists[0].len() {
udpproto.set_color((i / config::NUM_LEDS_PER_STRIP) as u8,
(i % config::NUM_LEDS_PER_STRIP) as u8,
(script.colorlists[0][i] * 255.0) as u8,
(script.colorlists[1][i] * 255.0) as u8,
(script.colorlists[2][i] * 255.0) as u8,
(script.colorlists[3][i] * 255.0) as u8).unwrap();
if Instant::now() > next_send_instant {
for i in 0..script.colorlists[0].len() {
udpproto.set_color((i / config::NUM_LEDS_PER_STRIP) as u8,
(i % config::NUM_LEDS_PER_STRIP) as u8,
(script.colorlists[0][i] * 255.0) as u8,
(script.colorlists[1][i] * 255.0) as u8,
(script.colorlists[2][i] * 255.0) as u8,
(script.colorlists[3][i] * 255.0) as u8).unwrap();
}
udpproto.commit().unwrap();
next_send_instant += send_period;
}
udpproto.commit().unwrap();
let now = Instant::now();
if now < next_block_instant {
sleep(next_block_instant - now);
}
next_block_instant = Instant::now() + block_period;
}
}