cleanup: factor out animation loop

src/main.rs

@@ -1,4 +1,5 @@
 #![warn(clippy::pedantic)]
+#![feature(never_type)]
 
 use std::{
     f32::consts::FRAC_PI_2,
@@ -6,7 +7,7 @@ use std::{
     net::{Ipv4Addr, SocketAddr, UdpSocket},
     path::PathBuf,
     thread::sleep,
-    time::Duration,
+    time::{Duration, Instant},
 };
 
 use bracket_color::prelude::{HSV, RGB};
@@ -14,7 +15,7 @@ use clap::{builder::TypedValueParser, Parser, Subcommand, ValueEnum};
 use image::{imageops::FilterType, io::Reader as ImageReader, Pixel, Rgb, RgbImage};
 use rand::Rng;
 
-use splink_client::{send_frame, Layout};
+use splink_client::{send_frame, Layout, SenderError};
 
 /// Blinkenwall v3 prototype client
 #[derive(Parser, Debug)]
@@ -170,6 +171,30 @@ fn print_image(image: &RgbImage) {
     }
 }
 
+fn animate<F: Fn(Layout, u32) -> RgbImage>(
+    socket: &UdpSocket,
+    layout: Layout,
+    generator: F,
+) -> Result<!, anyhow::Error> {
+    print!("{}", termion::clear::All);
+
+    let mut frame: u32 = rand::thread_rng().gen();
+    loop {
+        let start = Instant::now();
+        let image = generator(layout, frame);
+
+        print_image(&image);
+
+        match send_frame(socket, layout, frame, &image) {
+            Ok(()) | Err(SenderError::ConfirmationTimeout) => {}
+            Err(e) => return Err(e.into()),
+        };
+
+        println!("{:?}", Instant::now().duration_since(start));
+        frame += 1;
+    }
+}
+
 fn main() -> anyhow::Result<()> {
     let args = Args::parse();
 
@@ -205,25 +230,14 @@ fn main() -> anyhow::Result<()> {
             .resize_to_fill(layout.width_px(), layout.height_px(), FilterType::Gaussian)
             .into_rgb8(),
         Action::Animation { animation } => {
-            let f = match animation {
-                Animation::Rainbow => rainbow,
-                Animation::Bling => bling,
-            };
-
-            print!("{}", termion::clear::All);
-
-            let mut frame = 0;
-            loop {
-                let image = f(layout, frame);
-
-                print_image(&image);
-
-                let frame_num: u32 = rand::thread_rng().gen();
-                send_frame(&socket, layout, frame_num, &image)?;
-
-                sleep(Duration::from_millis(16));
-                frame += 1;
-            }
+            animate(
+                &socket,
+                layout,
+                match animation {
+                    Animation::Rainbow => rainbow,
+                    Animation::Bling => bling,
+                },
+            )?;
         }
     };