Initial proof of concept

.vscode/settings.json

@@ -1,5 +1,5 @@
 {
     "rust-analyzer.linkedProjects": [
-        "./helloworld/Cargo.toml",
+        "./webcam-streamer/Cargo.toml",
     ]
 }

Cargo.toml

@@ -1,3 +1,3 @@
 [workspace]
-members = ["helloworld"]
+members = ["webcam-streamer"]
 resolver = "2"

flake.lock

@@ -0,0 +1,96 @@
+{
+  "nodes": {
+    "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1681202837,
+        "narHash": "sha256-H+Rh19JDwRtpVPAWp64F+rlEtxUWBAQW28eAi3SRSzg=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "cfacdce06f30d2b68473a46042957675eebb3401",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1699099776,
+        "narHash": "sha256-X09iKJ27mGsGambGfkKzqvw5esP1L/Rf8H3u3fCqIiU=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "85f1ba3e51676fa8cc604a3d863d729026a6b8eb",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs_2": {
+      "locked": {
+        "lastModified": 1681358109,
+        "narHash": "sha256-eKyxW4OohHQx9Urxi7TQlFBTDWII+F+x2hklDOQPB50=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "96ba1c52e54e74c3197f4d43026b3f3d92e83ff9",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs",
+        "rust-overlay": "rust-overlay"
+      }
+    },
+    "rust-overlay": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs_2"
+      },
+      "locked": {
+        "lastModified": 1699236891,
+        "narHash": "sha256-J0uhoYlufJncIFbM/pAoggzHK/qERB9KfQRkmYD56yo=",
+        "owner": "oxalica",
+        "repo": "rust-overlay",
+        "rev": "a7f9bf91dc5065d470cd57169a9f2ebdbdfe1f24",
+        "type": "github"
+      },
+      "original": {
+        "owner": "oxalica",
+        "repo": "rust-overlay",
+        "type": "github"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -1,20 +1,9 @@
-/*
-TODO
-1. Find and replace "helloworld" with your package name for **ALL FILES IN REPOSITORY**
-2. Add a flake description that describes the workspace on line 27
-3. Add a package description on line 70
-4. (optional) uncomment `nativeBuildInputs` and `buildInputs` on lines 43 and 44 if you need openssl
-5. (optional) set your project homepage, license, and maintainers list on lines 48-51
-6. (optional) uncomment the NixOS module and update it for your needs
-7. Delete this comment block
-*/
-
 /*
 Some utility commands:
 - `nix flake update --commit-lock-file`
 - `nix flake lock update-input <input>`
-- `nix build .#helloworld` or `nix build .`
-- `nix run .#helloworld` or `nix run .`
+- `nix build .#webcam-streamer` or `nix build .`
+- `nix run .#webcam-streamer` or `nix run .`
 */
 
 {
@@ -34,15 +23,14 @@ Some utility commands:
       };
       rustSettings = with pkgs; {
         src = ./.;
-        #nativeBuildInputs = [ pkg-config ];
-        #buildInputs = [ openssl ];
+        buildInputs = with pkgs; [ ffmpeg ];
         cargoHash = nixpkgs.lib.fakeHash;
       };
       meta = with nixpkgs.lib; {
-        #homepage = "https://example.com";
-        #license = [ licenses.gpl3 ];
+        homepage = "https://git.elnu.com/ElnuDev/webcam-streamer";
+        license = [ licenses.gpl3 ];
         platforms = [ system ];
-        #maintainers = with maintainers; [ ];
+        maintainers = with maintainers; [ elnudev ];
       };
     in {
       devShells.${system}.default = with pkgs; mkShell {
@@ -53,14 +41,14 @@ Some utility commands:
           cargo-edit
           bacon
         ];
-        inputsFrom = with self.packages.${system}; [ helloworld ];
+        inputsFrom = with self.packages.${system}; [ webcam-streamer ];
       };
       packages.${system} = {
-        default = self.packages.${system}.helloworld;
-        helloworld = pkgs.rustPlatform.buildRustPackage (rustSettings // {
-          pname = "helloworld";
+        default = self.packages.${system}.webcam-streamer;
+        webcam-streamer = pkgs.rustPlatform.buildRustPackage (rustSettings // {
+          pname = "webcam-streamer";
           version = "0.1.0";
-          buildAndTestSubdir = "helloworld";
+          buildAndTestSubdir = "webcam-streamer";
           cargoHash = "sha256-+TaGIiKf+Pz2bTABeG8aCZz0/ZTCKl5398+qbas4Nvo=";
           meta = meta // {
             description = "";
@@ -71,14 +59,14 @@ Some utility commands:
       nixosModules.default = { config, ... }: let
         lib = nixpkgs.lib;
       in {
-        options.services.helloworld = {
-          enable = lib.mkEnableOption (lib.mdDoc "helloworld service");
+        options.services.webcam-streamer = {
+          enable = lib.mkEnableOption (lib.mdDoc "webcam-streamer service");
           package = lib.mkOption {
             type = lib.types.package;
-            default = self.packages.${system}.helloworld;
-            defaultText = "pkgs.helloworld";
+            default = self.packages.${system}.webcam-streamer;
+            defaultText = "pkgs.webcam-streamer";
             description = lib.mdDoc ''
-              The helloworld package that should be used.
+              The webcam-streamer package that should be used.
             '';
           };
           port = lib.mkOption {
@@ -89,16 +77,16 @@ Some utility commands:
             '';
           };
         };
-        config.systemd.services.helloworld = let
-          cfg = config.services.helloworld;
-          pkg = self.packages.${system}.helloworld;
+        config.systemd.services.webcam-streamer = let
+          cfg = config.services.webcam-streamer;
+          pkg = self.packages.${system}.webcam-streamer;
         in lib.mkIf cfg.enable {
           description = pkg.meta.description;
           after = [ "network.target" ];
           wantedBy = [ "network.target" ];
           serviceConfig = {
             ExecStart = ''
-              ${cfg.package}/bin/helloworld --port ${builtins.toString cfg.port}
+              ${cfg.package}/bin/webcam-streamer --port ${builtins.toString cfg.port}
             '';
             Restart = "always";
             DynamicUser = true;

helloworld/src/main.rs

@@ -1,3 +0,0 @@
-fn main() {
-    println!("Hello, world!");
-}

webcam-streamer/Cargo.toml

@@ -1,8 +1,11 @@
 [package]
-name = "helloworld"
+name = "webcam-streamer"
 version = "0.1.0"
 edition = "2021"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
+actix-web = "4.4.0"
+lazy_static = "1.4.0"
+rscam = { version = "0.5.5", features = ["no_wrapper"] }

webcam-streamer/src/main.rs

@@ -0,0 +1,59 @@
+use actix_web::{get, App, HttpResponse, HttpServer, Responder};
+use lazy_static::lazy_static;
+use rscam::Camera;
+use std::{
+    sync::Mutex,
+    thread,
+};
+
+const FPS: u32 = 30;
+
+lazy_static! {
+    static ref CAMERA: Camera = {
+        let mut camera = rscam::new("/dev/video0").unwrap();
+        camera
+            .start(&rscam::Config {
+                interval: (1, FPS),
+                resolution: (1280, 720),
+                format: b"MJPG",
+                ..Default::default()
+            })
+            .unwrap();
+        camera
+    };
+    static ref CURRENT_FRAME: Mutex<Vec<u8>> = Mutex::new(Vec::new());
+}
+
+#[get("/feed.jpg")]
+async fn get_feed() -> impl Responder {
+    HttpResponse::Ok()
+        .content_type("image/jpeg")
+        .body(CURRENT_FRAME.lock().unwrap().clone())
+}
+
+#[get("/")]
+async fn get_index() -> impl Responder {
+    HttpResponse::Ok().content_type("text/html").body(format!(
+        "
+            <img src=\"feed.jpg\">
+            <script>
+                const img = document.querySelector(\"img\");
+                setInterval(() => {{
+                    img.src = \"feed.jpg?\" + new Date().getTime();
+                }}, {});
+            </script>
+        ",
+        1000.0 / FPS as f32
+    ))
+}
+
+#[actix_web::main]
+async fn main() -> std::io::Result<()> {
+    thread::spawn(move || loop {
+        *CURRENT_FRAME.lock().unwrap() = CAMERA.capture().unwrap()[..].to_owned();
+    });
+    HttpServer::new(|| App::new().service(get_index).service(get_feed))
+        .bind(("127.0.0.1", 8080))?
+        .run()
+        .await
+}