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Xiretza 2022-06-17 17:26:04 +02:00
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14
Cargo.toml Normal file
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@ -0,0 +1,14 @@
[package]
name = "splink_client"
version = "0.1.0"
edition = "2021"
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[dependencies]
anyhow = "1.0.57"
clap = { version = "3.1.18", features = ["derive", "deprecated"] }
image = "0.24.2"
rand = "0.8.5"
termion = "1.5.6"
thiserror = "1.0.31"

133
src/lib.rs Normal file
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#![warn(clippy::pedantic)]
mod strandifier;
pub use strandifier::{Strandifier, StrandifierError};
mod sender;
pub use sender::{SenderError, send_strand, send_frame};
/// The LED wall's layout.
///
/// The wall consists of a grid of panels (`num_panels_h` by `num_panels_v`), each of which
/// contains one strand. Each strand is wound in an S-shape, going sideways for `gang_len`
/// pixels before going down and sideways again in the opposite direction. There are `num_gangs`
/// of these gangs per strand.
///
/// The following is a strand with a `gang_len` of 5 and `num_gangs` of 4:
///
/// ```plain
/// 1 5
/// x - x - x - x - x
/// |
/// x - x - x - x - x
/// |
/// x - x - x - x - x
/// |
/// x - x - x - x - x
/// 20 16
/// ```
#[derive(Clone, Copy, Debug, PartialEq, Eq)]
pub struct Layout {
pub gang_len: u32,
pub num_gangs: u32,
pub num_panels_h: u32,
pub num_panels_v: u32,
}
impl Layout {
/// The length of each strand.
///
/// ```rust
/// # use splink_client::Layout;
/// let layout = Layout {
/// gang_len: 5,
/// num_gangs: 4,
///
/// num_panels_h: 3,
/// num_panels_v: 6,
/// };
///
/// assert_eq!(layout.strand_len(), 20);
/// ```
#[must_use]
pub fn strand_len(&self) -> u32 {
self.gang_len * self.num_gangs
}
/// The number of strands/panels on the wall.
///
/// ```rust
/// # use splink_client::Layout;
/// let layout = Layout {
/// gang_len: 5,
/// num_gangs: 4,
///
/// num_panels_h: 3,
/// num_panels_v: 6,
/// };
///
/// assert_eq!(layout.num_strands(), 18);
/// ```
#[must_use]
pub fn num_strands(&self) -> u32 {
self.num_panels_h * self.num_panels_v
}
/// The total number of pixels on the wall.
///
/// ```rust
/// # use splink_client::Layout;
/// let layout = Layout {
/// gang_len: 5,
/// num_gangs: 4,
///
/// num_panels_h: 3,
/// num_panels_v: 6,
/// };
///
/// assert_eq!(layout.num_pixels(), 360);
/// ```
#[must_use]
pub fn num_pixels(&self) -> u32 {
self.strand_len() * self.num_panels_h * self.num_panels_v
}
/// The width of the wall, in pixels.
///
/// ```rust
/// # use splink_client::Layout;
/// let layout = Layout {
/// gang_len: 5,
/// num_gangs: 4,
///
/// num_panels_h: 3,
/// num_panels_v: 6,
/// };
///
/// assert_eq!(layout.width_px(), 15);
/// ```
#[must_use]
pub fn width_px(&self) -> u32 {
self.gang_len * self.num_panels_h
}
/// The height of the wall, in pixels.
///
/// ```rust
/// # use splink_client::Layout;
/// let layout = Layout {
/// gang_len: 5,
/// num_gangs: 4,
///
/// num_panels_h: 3,
/// num_panels_v: 6,
/// };
///
/// assert_eq!(layout.height_px(), 24);
/// ```
#[must_use]
pub fn height_px(&self) -> u32 {
self.num_gangs * self.num_panels_v
}
}

124
src/main.rs Normal file
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@ -0,0 +1,124 @@
#![warn(clippy::pedantic)]
use std::{
f32::consts::FRAC_PI_2,
io::stdout,
net::{Ipv4Addr, SocketAddr, UdpSocket},
thread::sleep,
time::Duration,
};
use clap::Parser;
use image::{Pixel, Rgb, RgbImage};
use rand::Rng;
use splink_client::{Layout, send_frame};
/// Blinkenwall v3 prototype client
#[derive(Parser, Debug)]
#[clap(author, version, about, long_about = None)]
struct Args {
/// Timeout in ms for frame completion responses (0 to disable)
#[clap(long, default_value_t = 3)]
response_timeout: u64,
/// Local address and port to bind to
#[clap(long = "bind")]
bind_addr: Option<SocketAddr>,
/// Controller's address
remote_addr: SocketAddr,
}
fn get_frame(layout: Layout, frame: u32) -> RgbImage {
#![allow(
clippy::cast_precision_loss,
clippy::cast_lossless,
clippy::cast_possible_truncation,
clippy::cast_sign_loss
)]
let w = layout.width_px();
let h = layout.height_px();
let frame = frame % 60;
let frame = frame as f32 / 3.0;
RgbImage::from_fn(w, h, |x, y| {
let dist_from_center = {
let x = x as f32;
let y = y as f32;
let center_x = w as f32 / 2.0;
let center_y = h as f32 / 2.0;
((x - center_x).powf(2.0) + (y - center_y).powf(2.0)).sqrt()
};
let radius = frame.powf(1.8);
let dist_from_radius = dist_from_center - radius;
let dist = 0.3 * dist_from_radius;
Rgb([100, 0, 100]).map(|x| {
(if dist < 0.0 {
(1.0 - (dist.abs() / 10.0)).max(0.0)
} else {
dist.min(FRAC_PI_2).cos()
} * x as f32) as u8
})
})
}
fn print_image(image: &RgbImage) {
let _hide = termion::cursor::HideCursor::from(stdout());
print!("{}", termion::cursor::Goto(1, 1));
for row in image.rows() {
for &Rgb([r, g, b]) in row {
print!("{} ", termion::color::Rgb(r, g, b).bg_string());
}
println!("{}", termion::color::Reset.bg_str());
}
}
fn main() -> anyhow::Result<()> {
let args = Args::parse();
let bind_addr = args
.bind_addr
.unwrap_or_else(|| (Ipv4Addr::UNSPECIFIED, 0).into());
let socket = UdpSocket::bind(bind_addr)?;
socket.connect(args.remote_addr)?;
socket.set_read_timeout(match args.response_timeout {
0 => None,
t => Some(Duration::from_millis(t)),
})?;
let layout = Layout {
gang_len: 8,
num_gangs: 32,
num_panels_h: 6,
num_panels_v: 1,
};
for frame in 0.. {
let image = get_frame(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));
}
let image = RgbImage::from_fn(96, 64, |_x, y| {
[Rgb([0, 3, 1]), Rgb([1, 3, 0]), Rgb([3, 0, 1])][y as usize % 3]
});
Ok(())
}

96
src/sender.rs Normal file
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@ -0,0 +1,96 @@
use std::{
io::{self, ErrorKind},
net::UdpSocket,
};
use image::{Rgb, RgbImage};
use thiserror::Error;
use crate::{Layout, Strandifier, StrandifierError};
#[derive(Debug, Error)]
#[allow(clippy::module_name_repetitions)]
pub enum SenderError {
#[error("IO error")]
Io(#[from] io::Error),
#[error("Strandifier failed")]
Strandifier(#[from] StrandifierError),
#[error("Controller failed to confirm frame")]
ConfirmationTimeout,
#[error("Invalid confirmation packet: {0:?}")]
ConfirmationInvalid(Vec<u8>),
#[error("Confirmation packet for wrong frame number: expected {expected}, got {got}")]
ConfirmationMismatched { expected: u32, got: u32 },
}
/// Sends a strand's data to the controller.
///
/// # Errors
///
/// Returns an error if network communication fails.
pub fn send_strand<I: IntoIterator<Item = Rgb<u8>>>(
socket: &UdpSocket,
strand_num: u32,
frame_num: u32,
pixels: I,
) -> Result<(), SenderError> {
const MAGIC: u32 = u32::from_be_bytes(*b"PIXL");
let pixels = pixels.into_iter().map(|c| {
let mut bytes = [0; 4];
bytes[1..].copy_from_slice(&c.0);
u32::from_be_bytes(bytes)
});
let buf: Vec<_> = [MAGIC, strand_num, frame_num]
.into_iter()
.chain(pixels)
.flat_map(u32::to_be_bytes)
.collect();
socket.send(&buf)?;
Ok(())
}
/// Sends an entire image frame to the controller.
///
/// # Errors
///
/// Returns an error if the image does not have the correct dimensions, if network communication
/// fails or if the controller does not confirm reception of the frame.
pub fn send_frame(
socket: &UdpSocket,
layout: Layout,
frame_num: u32,
image: &RgbImage,
) -> Result<(), SenderError> {
for strand_num in 0..layout.num_strands() {
let data = Strandifier::make_strand(layout, image, strand_num)?;
send_strand(socket, strand_num, frame_num, data)?;
}
let mut buf = vec![0; 100];
let len = match socket.recv(&mut buf) {
Ok(len) => len,
//Err(e) if e.kind() == ErrorKind::TimedOut => return Err(SenderError::ConfirmationTimeout),
Err(e) => return Err(SenderError::ConfirmationTimeout),
Err(e) => return Err(SenderError::Io(e)),
};
let buf = &buf[..len];
let response_frame_num = u32::from_be_bytes(
buf.try_into()
.map_err(|_| SenderError::ConfirmationInvalid(buf.to_vec()))?,
);
if response_frame_num != frame_num {
return Err(SenderError::ConfirmationMismatched {
expected: frame_num,
got: response_frame_num,
});
}
Ok(())
}

270
src/strandifier.rs Normal file
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@ -0,0 +1,270 @@
use std::iter::FusedIterator;
use image::{Rgb, RgbImage};
use thiserror::Error;
use crate::Layout;
#[derive(Clone, Copy, Debug, PartialEq, Eq, Error)]
#[allow(clippy::module_name_repetitions)]
pub enum StrandifierError {
#[error("Wrong image dimensions")]
WrongDimensions,
#[error("Invalid strand number")]
InvalidStrand,
}
/// Iterator over a strand's pixels, extracted from an [`RgbImage`].
#[derive(Clone, Debug)]
pub struct Strandifier<'a> {
layout: Layout,
image: &'a RgbImage,
pixels_remaining: u32,
next_x: u32,
next_y: u32,
}
impl<'a> Strandifier<'a> {
/// Create an iterator over a strand's pixels.
///
/// # Errors
///
/// Returns `StrandifierError::WrongDimensions` if the `layout` does not match up with the
/// `image`'s dimensions.
///
/// Returns `StrandifierError::InvalidStrand` if the supplied strand number is higher than the
/// number of strands in the [`Layout`].
#[allow(clippy::missing_panics_doc)]
pub fn make_strand(
layout: Layout,
image: &'a RgbImage,
strand_num: u32,
) -> Result<Self, StrandifierError> {
if layout.width_px() != image.width() || layout.height_px() != image.height() {
return Err(StrandifierError::WrongDimensions);
}
if strand_num > layout.num_strands() {
return Err(StrandifierError::InvalidStrand);
}
let panel_x = strand_num % layout.num_panels_h;
let panel_y = strand_num / layout.num_panels_h;
let first_x = panel_x * layout.gang_len;
let first_y = panel_y * layout.num_gangs;
Ok(Self {
layout,
image,
pixels_remaining: layout.strand_len(),
next_x: first_x,
next_y: first_y,
})
}
}
impl<'a> Iterator for Strandifier<'a> {
type Item = Rgb<u8>;
fn next(&mut self) -> Option<Self::Item> {
if self.pixels_remaining == 0 {
return None;
}
let x = self.next_x;
let y = self.next_y;
if (y % self.layout.num_gangs) % 2 == 0 {
// Right-moving gang
if x % self.layout.gang_len == self.layout.gang_len - 1 {
// End of gang - move down
self.next_y += 1;
} else {
// move right
self.next_x += 1;
}
} else {
// Left-moving gang
if x % self.layout.gang_len == 0 {
// End of gang - move down
self.next_y += 1;
} else {
// move left
self.next_x -= 1;
}
}
self.pixels_remaining -= 1;
Some(*self.image.get_pixel(x, y))
}
fn size_hint(&self) -> (usize, Option<usize>) {
let remaining = self.pixels_remaining.try_into().unwrap();
(remaining, Some(remaining))
}
}
impl<'a> FusedIterator for Strandifier<'a> {}
impl<'a> ExactSizeIterator for Strandifier<'a> {}
#[cfg(test)]
mod tests {
use super::*;
fn test_image(layout: Layout) -> RgbImage {
let width = layout.width_px();
let height = layout.height_px();
RgbImage::from_fn(width, height, |x, y| {
Rgb([x.try_into().unwrap(), y.try_into().unwrap(), 0])
})
}
#[test]
fn strandifier_basic() {
let layout = Layout {
gang_len: 5,
num_gangs: 4,
num_panels_h: 3,
num_panels_v: 6,
};
let image = test_image(layout);
let strand = Strandifier::make_strand(layout, &image, 0).unwrap();
assert_eq!(
strand.collect::<Vec<_>>(),
[
Rgb([0, 0, 0]),
Rgb([1, 0, 0]),
Rgb([2, 0, 0]),
Rgb([3, 0, 0]),
Rgb([4, 0, 0]),
//
Rgb([4, 1, 0]),
Rgb([3, 1, 0]),
Rgb([2, 1, 0]),
Rgb([1, 1, 0]),
Rgb([0, 1, 0]),
//
Rgb([0, 2, 0]),
Rgb([1, 2, 0]),
Rgb([2, 2, 0]),
Rgb([3, 2, 0]),
Rgb([4, 2, 0]),
//
Rgb([4, 3, 0]),
Rgb([3, 3, 0]),
Rgb([2, 3, 0]),
Rgb([1, 3, 0]),
Rgb([0, 3, 0]),
]
);
let strand = Strandifier::make_strand(layout, &image, 4).unwrap();
assert_eq!(
strand.collect::<Vec<_>>(),
[
Rgb([5, 4, 0]),
Rgb([6, 4, 0]),
Rgb([7, 4, 0]),
Rgb([8, 4, 0]),
Rgb([9, 4, 0]),
//
Rgb([9, 5, 0]),
Rgb([8, 5, 0]),
Rgb([7, 5, 0]),
Rgb([6, 5, 0]),
Rgb([5, 5, 0]),
//
Rgb([5, 6, 0]),
Rgb([6, 6, 0]),
Rgb([7, 6, 0]),
Rgb([8, 6, 0]),
Rgb([9, 6, 0]),
//
Rgb([9, 7, 0]),
Rgb([8, 7, 0]),
Rgb([7, 7, 0]),
Rgb([6, 7, 0]),
Rgb([5, 7, 0]),
]
);
}
#[test]
fn strandifier_thin() {
let layout = Layout {
gang_len: 1,
num_gangs: 6,
num_panels_h: 3,
num_panels_v: 4,
};
let image = test_image(layout);
let strand = Strandifier::make_strand(layout, &image, 0).unwrap();
assert_eq!(
strand.collect::<Vec<_>>(),
[
Rgb([0, 0, 0]),
Rgb([0, 1, 0]),
Rgb([0, 2, 0]),
Rgb([0, 3, 0]),
Rgb([0, 4, 0]),
Rgb([0, 5, 0]),
]
);
let layout = Layout {
gang_len: 6,
num_gangs: 1,
num_panels_h: 3,
num_panels_v: 4,
};
let image = test_image(layout);
let strand = Strandifier::make_strand(layout, &image, 11).unwrap();
assert_eq!(
strand.collect::<Vec<_>>(),
[
Rgb([12, 3, 0]),
Rgb([13, 3, 0]),
Rgb([14, 3, 0]),
Rgb([15, 3, 0]),
Rgb([16, 3, 0]),
Rgb([17, 3, 0]),
]
);
}
#[test]
fn strandifier_errors() {
let layout = Layout {
gang_len: 5,
num_gangs: 4,
num_panels_h: 3,
num_panels_v: 6,
};
let image = test_image(layout);
assert_eq!(
Strandifier::make_strand(layout, &image, 20).unwrap_err(),
StrandifierError::InvalidStrand
);
let layout2 = Layout {
num_gangs: 6,
..layout
};
assert_eq!(
Strandifier::make_strand(layout2, &image, 0).unwrap_err(),
StrandifierError::WrongDimensions
);
}
}