88 lines
2.9 KiB
Rust
88 lines
2.9 KiB
Rust
use std::{array::from_ref, net::SocketAddr, result, sync::Arc, thread::{self, sleep}, time::Duration};
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use image::{codecs::jpeg::JpegEncoder, ImageBuffer, Rgb};
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use nokhwa::{pixel_format::RgbFormat, utils::{ApiBackend, RequestedFormat, RequestedFormatType, Resolution}, Camera};
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use anyhow::{Context, Ok, Result};
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use tokio::{io::AsyncWriteExt, net::{TcpListener, TcpStream}, runtime::Runtime, sync::{Notify, RwLock}, task::LocalSet};
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fn main() -> Result<()>{
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let await_frame = Arc::new(Notify::new());
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let latest_frame = Arc::new(RwLock::new(Vec::new()));
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{
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let runtime = Runtime::new()?;
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let await_frame = await_frame.clone();
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let latest_frame = latest_frame.clone();
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thread::spawn(move || {
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let local = LocalSet::new();
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local.block_on(&runtime, camera_manager(await_frame, latest_frame)).unwrap();
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});
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}
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{
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let runtime = Runtime::new()?;
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let await_frame = await_frame.clone();
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let latest_frame = latest_frame.clone();
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thread::spawn(move || {
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let local = LocalSet::new();
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local.block_on(&runtime, server(await_frame, latest_frame)).unwrap();
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});
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}
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loop {}
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}
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async fn camera_manager(await_frame: Arc<Notify>, latest_frame: Arc<RwLock<Vec<u8>>>) -> Result<()>{
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let cameras = nokhwa::query(ApiBackend::Auto)?;
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let camera = cameras.get(0).context("no cameras")?;
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println!("using: {}",camera.human_name());
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let requested = RequestedFormat::new::<RgbFormat>(RequestedFormatType::HighestResolution(Resolution::new(320, 240)));
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let mut camera = Camera::new(camera.index().clone(), requested)?;
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camera.open_stream()?;
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loop {
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let frame = camera.frame()?;
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let frame: ImageBuffer<Rgb<u8>, Vec<u8>> = frame.decode_image::<RgbFormat>()?;
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let mut output = Vec::new();
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let mut encoder = JpegEncoder::new_with_quality(&mut output, 30);
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encoder.encode_image(&frame).unwrap();
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*latest_frame.write().await = output;
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await_frame.notify_waiters();
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}
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}
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async fn stream_video(await_frame: Arc<Notify>, latest_frame: Arc<RwLock<Vec<u8>>>, mut client: TcpStream) -> Result<()>{
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loop {
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await_frame.notified().await;
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let data = latest_frame.read().await;
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println!("len: {}", data.len());
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let len = data.len();
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// holding data across await, likely nonissue
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client.write_u32(len as u32).await?;
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client.write(&data).await?;
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}
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}
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async fn server(await_frame: Arc<Notify>, latest_frame: Arc<RwLock<Vec<u8>>>) -> Result<()> {
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let port = 2993;
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let listener = TcpListener::bind(format!("0.0.0.0:{port}")).await?;
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println!("listening on {port}");
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while let result::Result::Ok((client, addr)) = listener.accept().await {
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println!("connected to {:?}", addr);
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tokio::task::spawn_local(stream_video(await_frame.clone(), latest_frame.clone(), client));
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}
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Ok(())
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}
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