.gitignore

@@ -0,0 +1,2 @@
+node_modules/*
+dist/*

package.json

@@ -0,0 +1,18 @@
+{
+  "dependencies": {
+    "@roamhq/wrtc": "^0.8.0",
+    "node-pre-gyp": "^0.17.0",
+    "ws": "^8.18.0"
+  },
+  "scripts": {
+    "build": "npx tsc --skipLibCheck --outDir dist src/server.ts",
+    "start": "npm run build && node dist/server.js",
+    "debug": "npx ts-node src/server.ts"
+  },
+  "devDependencies": {
+    "@types/node": "^22.10.2",
+    "@types/ws": "^8.5.13",
+    "ts-node": "^10.9.2",
+    "typescript": "^5.8.2"
+  }
+}

scripts.bash

@@ -0,0 +1,6 @@
+curl https://git.linuxtv.org/dtv-scan-tables.git/plain/atsc/us-ATSC-center-frequencies-8VSB
+
+
+dvbv5-zap -c dvb_channel.conf -CUS -IZAP "ION"
+
+dvbv5-scan -Cus -o dvb_channel.conf -O zap -v  us-ATSC-center-frequencies-8VSB

src/server.ts

@@ -0,0 +1,172 @@
+// @ts-ignore
+import { nonstandard, RTCPeerConnection, MediaStreamTrack, MediaStream, RTCSessionDescription } from '@roamhq/wrtc';
+import { spawn, ChildProcessWithoutNullStreams } from 'child_process';
+import { Readable } from 'stream';
+import * as ws from 'ws'
+import * as fs from 'fs';
+import { i420ToRgba, RTCVideoSource } from '@roamhq/wrtc/types/nonstandard';
+// import { RTCVideoSource } from '@roamhq/wrtc/types/nonstandard';
+
+
+
+// type RTCVideoSource = nonstandard.RTCVideoSource;
+// const RTCVideoSource = wrtc.nonstandard.RTCVideoSource;
+// const {mediaDevices} = wrtc
+
+// Constants
+const VIDEO_DEVICE = '/dev/video0'; // Video source device
+const WIDTH = 640; // Video width
+const HEIGHT = 480; // Video height
+const FRAME_SIZE = WIDTH * HEIGHT * 1.5; // YUV420p frame size (460800 bytes)
+
+class VideoStream extends Readable {
+    private device: fs.ReadStream;
+
+    constructor(devicePath: string) {
+        super();
+        this.device = fs.createReadStream(devicePath);
+    }
+
+    _read(size: number): void {
+        const chunk = this.device.read(size);
+        if (chunk === null) {
+            this.push(null); // Signal end of stream
+        } else {
+            this.push(chunk);
+        }
+    }
+}
+
+
+// Function to start FFmpeg and capture raw video
+function startFFmpeg(): ChildProcessWithoutNullStreams {
+    return spawn('ffmpeg', [
+        '-f', 'v4l2', // Use Video4Linux2 for video capture
+        '-i', VIDEO_DEVICE, // Input device
+        '-vf', `scale=${WIDTH}:${HEIGHT}`, // Scale video resolution
+        '-vcodec', 'rawvideo', // Output raw video codec
+        '-pix_fmt', 'yuv420p', // Pixel format for WebRTC
+        '-f', 'rawvideo', // Output format
+        'pipe:1' // Pipe to stdout
+    ]);
+}
+
+// const videoSource = 
+
+
+
+
+let frameBuffer = Buffer.alloc(0);
+const ffmpegProcess = startFFmpeg();
+const videoSource = new nonstandard.RTCVideoSource();
+// Function to create a WebRTC PeerConnection
+async function createPeerConnection(): Promise<RTCPeerConnection> {
+    
+    const peerConnection = new RTCPeerConnection({iceServers: []} );
+
+    // Create a video source
+
+    // const videoStream = new VideoStream('/dev/video0');
+
+    // track.addEventListener('')
+
+
+
+    // Start FFmpeg and pipe video frames to the source
+
+   
+    ffmpegProcess.stdout.on('data', (chunk: Buffer) => {
+        // Push video frames to the RTCVideoSource
+      
+        frameBuffer = Buffer.concat([frameBuffer, chunk]);
+        while (frameBuffer.length >= FRAME_SIZE) {
+
+            const frameData = frameBuffer.slice(0, FRAME_SIZE);
+            frameBuffer = frameBuffer.slice(FRAME_SIZE); // Keep remaining data
+
+         
+            const frame: nonstandard.RTCVideoFrame = {
+                width: WIDTH,
+                height: HEIGHT,
+                data: new Uint8Array(frameData),
+            }
+
+            videoSource.onFrame(frame);
+        } 
+    });
+
+    ffmpegProcess.stderr.on('data', (data: Buffer) => {
+        // console.error('FFmpeg Error:', data.toString());
+    });
+
+    ffmpegProcess.on('exit', (code) => {
+        console.log(`FFmpeg exited with code ${code}`);
+    });
+
+    // Add the track to the PeerConnection
+    const track: MediaStreamTrack = videoSource.createTrack();
+    console.log('vdei src ',videoSource.isScreencast)
+    const stream = new MediaStream()
+    stream.addTrack(track)
+    console.log('enabled ',track.enabled, track.id, track.kind, track.label, track.readyState);
+    // track.
+    console.log('get',stream.getVideoTracks()[0].id)
+    peerConnection.addTrack(track, stream)
+    // peerConnection.addTransceiver(track, { direction: 'sendonly' });    // peerConnection.add
+    // peerConnection.addIceCandidate();
+    // peerConnection
+    // console.log('Stream with track:', s.track.);
+    return peerConnection;
+}
+
+
+
+// WebSocket signaling server
+const wss = new ws.WebSocketServer({ port: 8080 });
+
+wss.on('connection', async (ws: ws.WebSocket) => {
+    const peerConnection: RTCPeerConnection = await createPeerConnection();
+    // const source = new RTCVideoSource();
+
+    console.log('Client connected');
+    ws.on('message', async (message: Buffer) => {
+        const { type, data} = JSON.parse(message.toString());
+        console.log("message type", type)
+
+        if(type == 'offer') {
+            await peerConnection.setRemoteDescription(data);
+            const answer = await peerConnection.createAnswer();
+            await peerConnection.setLocalDescription(answer);
+            ws.send(JSON.stringify({ type: 'answer', data: peerConnection.localDescription }));
+        }
+
+        if (type === 'ice-candidate') {
+            console.log('type ice')
+            await peerConnection.addIceCandidate(data);
+          }
+
+    });
+
+    peerConnection.oniceconnectionstatechange = () => {
+        console.log('ICE connection state:', peerConnection.iceConnectionState);
+        if (peerConnection.iceConnectionState === 'failed') {
+            console.error('ICE connection failed');
+        }
+    };
+    
+
+    // Send ICE candidates to the client
+    peerConnection.onicecandidate = ({ candidate }) => {
+        console.log("onicecandidate")
+        if (candidate) {
+            ws.send(JSON.stringify({  type: 'ice-candidate', data: candidate  }));
+        }
+    };
+
+    ws.on('close', () => {
+        console.log('Client disconnected');
+        peerConnection.close();
+    });
+});
+
+console.log('WebRTC signaling server running on ws://localhost:8080');

static/index.html

@@ -0,0 +1,70 @@
+<!DOCTYPE html>
+<html>
+
+<head>
+  <title>WebRTC Stream</title>
+  <script src="https://cdnjs.cloudflare.com/ajax/libs/dashjs/4.7.1/dash.all.min.js"></script>
+
+</head>
+
+<body>
+  <h1>Video streams</h1>
+  <h2>WebRTC</h2>
+  <video id="video" autoplay playsinline controls></video>
+
+  <script>
+    const ws = new WebSocket('ws://localhost:8080');
+    const pc = new RTCPeerConnection({ iceServers: [] });
+    const video = document.getElementById('video');
+
+    pc.onconnectionstatechange = (event) => {
+      console.log("onconnectionstatechange ", event)
+    }
+
+    pc.ondatachannel = (event) => {
+      console.log("ondatachannel ", event)
+    }
+
+    pc.ontrack = (event) => {
+      console.log("Received track event", event.streams);
+      video.srcObject = event.streams[0];
+    };
+
+    pc.onicecandidate = ({ candidate }) => {
+      console.log("pc.onicecandidate")
+      if (candidate) {
+        ws.send(JSON.stringify({ type: 'ice-candidate', data: candidate })); // Use 'candidate' instead of 'ice-candidate'
+      }
+    };
+    pc.onicegatheringstatechange = () => {
+      console.log('ICE state:', pc.iceGatheringState);
+    };
+
+    ws.onopen = async () => {
+      pc.addTransceiver('video', { direction: 'recvonly' });
+      const offer = await pc.createOffer();
+      await pc.setLocalDescription(offer);
+      // ws.send(JSON.stringify(offer));
+      console.log("on open ")
+      // ws.send(JSON.stringify(offer));
+      ws.send(JSON.stringify({ type: 'offer', data: offer }));
+    }
+
+    ws.onmessage = async (message) => {
+      const msg = JSON.parse(message.data);
+      console.log("onmessage type:", msg.type, msg)
+
+      if (msg.type === 'answer') {
+        await pc.setRemoteDescription(msg.data);
+      }
+
+      else if (msg.type === 'ice-candidate') {
+        await pc.addIceCandidate(msg.data);
+      }
+    };
+
+    ;
+  </script>
+</body>
+
+</html>

tsconfig.json

@@ -0,0 +1,116 @@
+{
+  "compilerOptions": {
+    /* Visit https://aka.ms/tsconfig to read more about this file */
+    /* Projects */
+    // "incremental": true,                              /* Save .tsbuildinfo files to allow for incremental compilation of projects. */
+    // "composite": true,                                /* Enable constraints that allow a TypeScript project to be used with project references. */
+    // "tsBuildInfoFile": "./.tsbuildinfo",              /* Specify the path to .tsbuildinfo incremental compilation file. */
+    // "disableSourceOfProjectReferenceRedirect": true,  /* Disable preferring source files instead of declaration files when referencing composite projects. */
+    // "disableSolutionSearching": true,                 /* Opt a project out of multi-project reference checking when editing. */
+    // "disableReferencedProjectLoad": true,             /* Reduce the number of projects loaded automatically by TypeScript. */
+    /* Language and Environment */
+    "target": "ES2020", /* Set the JavaScript language version for emitted JavaScript and include compatible library declarations. */
+    "lib": [
+      "esnext",
+      "ES2020",
+      "DOM"
+    ], /* Specify a set of bundled library declaration files that describe the target runtime environment. */
+    // "jsx": "preserve",                                /* Specify what JSX code is generated. */
+    // "experimentalDecorators": true,                   /* Enable experimental support for legacy experimental decorators. */
+    // "emitDecoratorMetadata": true,                    /* Emit design-type metadata for decorated declarations in source files. */
+    // "jsxFactory": "",                                 /* Specify the JSX factory function used when targeting React JSX emit, e.g. 'React.createElement' or 'h'. */
+    // "jsxFragmentFactory": "",                         /* Specify the JSX Fragment reference used for fragments when targeting React JSX emit e.g. 'React.Fragment' or 'Fragment'. */
+    // "jsxImportSource": "",                            /* Specify module specifier used to import the JSX factory functions when using 'jsx: react-jsx*'. */
+    // "reactNamespace": "",                             /* Specify the object invoked for 'createElement'. This only applies when targeting 'react' JSX emit. */
+    "noLib": false, /* Disable including any library files, including the default lib.d.ts. */
+    // "useDefineForClassFields": true,                  /* Emit ECMAScript-standard-compliant class fields. */
+    // "moduleDetection": "auto",                        /* Control what method is used to detect module-format JS files. */
+    /* Modules */
+    "module": "commonjs", /* Specify what module code is generated. */
+    "rootDir": "src",                                  /* Specify the root folder within your source files. */
+    "moduleResolution": "node10", /* Specify how TypeScript looks up a file from a given module specifier. */
+    // "baseUrl": "./",                                  /* Specify the base directory to resolve non-relative module names. */
+    // "paths": {},                                      /* Specify a set of entries that re-map imports to additional lookup locations. */
+    // "rootDirs": [],                                   /* Allow multiple folders to be treated as one when resolving modules. */
+    // "types": ["node", "webrtc"],
+    // "typeRoots": ["./node_modules/@types"],
+    // "typeRoots": ["./node_modules/@types/webrtc"],                                  /* Specify multiple folders that act like './node_modules/@types'. */
+    // "types": [],                                      /* Specify type package names to be included without being referenced in a source file. */
+    // "allowUmdGlobalAccess": true,                     /* Allow accessing UMD globals from modules. */
+    // "moduleSuffixes": [],                             /* List of file name suffixes to search when resolving a module. */
+    // "allowImportingTsExtensions": true,               /* Allow imports to include TypeScript file extensions. Requires '--moduleResolution bundler' and either '--noEmit' or '--emitDeclarationOnly' to be set. */
+    // "rewriteRelativeImportExtensions": true,          /* Rewrite '.ts', '.tsx', '.mts', and '.cts' file extensions in relative import paths to their JavaScript equivalent in output files. */
+    // "resolvePackageJsonExports": true,                /* Use the package.json 'exports' field when resolving package imports. */
+    // "resolvePackageJsonImports": true,                /* Use the package.json 'imports' field when resolving imports. */
+    // "customConditions": [],                           /* Conditions to set in addition to the resolver-specific defaults when resolving imports. */
+    // "noUncheckedSideEffectImports": true,             /* Check side effect imports. */
+    // "resolveJsonModule": true,                        /* Enable importing .json files. */
+    // "allowArbitraryExtensions": true,                 /* Enable importing files with any extension, provided a declaration file is present. */
+    // "noResolve": true,                                /* Disallow 'import's, 'require's or '<reference>'s from expanding the number of files TypeScript should add to a project. */
+    /* JavaScript Support */
+    // "allowJs": true,                                  /* Allow JavaScript files to be a part of your program. Use the 'checkJS' option to get errors from these files. */
+    // "checkJs": true,                                  /* Enable error reporting in type-checked JavaScript files. */
+    // "maxNodeModuleJsDepth": 1,                        /* Specify the maximum folder depth used for checking JavaScript files from 'node_modules'. Only applicable with 'allowJs'. */
+    /* Emit */
+    // "declaration": true,                              /* Generate .d.ts files from TypeScript and JavaScript files in your project. */
+    // "declarationMap": true,                           /* Create sourcemaps for d.ts files. */
+    // "emitDeclarationOnly": true,                      /* Only output d.ts files and not JavaScript files. */
+    "sourceMap": true,                                /* Create source map files for emitted JavaScript files. */
+    // "inlineSourceMap": true,                          /* Include sourcemap files inside the emitted JavaScript. */
+    // "noEmit": true,                                   /* Disable emitting files from a compilation. */
+    // "outFile": "./",                                  /* Specify a file that bundles all outputs into one JavaScript file. If 'declaration' is true, also designates a file that bundles all .d.ts output. */
+    "outDir": "dist",                                   /* Specify an output folder for all emitted files. */
+    // "removeComments": true,                           /* Disable emitting comments. */
+    // "importHelpers": true,                            /* Allow importing helper functions from tslib once per project, instead of including them per-file. */
+    // "downlevelIteration": true,                       /* Emit more compliant, but verbose and less performant JavaScript for iteration. */
+    // "sourceRoot": "",                                 /* Specify the root path for debuggers to find the reference source code. */
+    // "mapRoot": "",                                    /* Specify the location where debugger should locate map files instead of generated locations. */
+    // "inlineSources": true,                            /* Include source code in the sourcemaps inside the emitted JavaScript. */
+    // "emitBOM": true,                                  /* Emit a UTF-8 Byte Order Mark (BOM) in the beginning of output files. */
+    // "newLine": "crlf",                                /* Set the newline character for emitting files. */
+    // "stripInternal": true,                            /* Disable emitting declarations that have '@internal' in their JSDoc comments. */
+    // "noEmitHelpers": true,                            /* Disable generating custom helper functions like '__extends' in compiled output. */
+    "noEmitOnError": false, /* Disable emitting files if any type checking errors are reported. */
+    // "preserveConstEnums": true,                       /* Disable erasing 'const enum' declarations in generated code. */
+    // "declarationDir": "./",                           /* Specify the output directory for generated declaration files. */
+    /* Interop Constraints */
+    // "isolatedModules": true,                          /* Ensure that each file can be safely transpiled without relying on other imports. */
+    // "verbatimModuleSyntax": true,                     /* Do not transform or elide any imports or exports not marked as type-only, ensuring they are written in the output file's format based on the 'module' setting. */
+    // "isolatedDeclarations": true,                     /* Require sufficient annotation on exports so other tools can trivially generate declaration files. */
+    "allowSyntheticDefaultImports": true, /* Allow 'import x from y' when a module doesn't have a default export. */
+    "esModuleInterop": true, /* Emit additional JavaScript to ease support for importing CommonJS modules. This enables 'allowSyntheticDefaultImports' for type compatibility. */
+    // "preserveSymlinks": true,                         /* Disable resolving symlinks to their realpath. This correlates to the same flag in node. */
+    "forceConsistentCasingInFileNames": true, /* Ensure that casing is correct in imports. */
+    /* Type Checking */
+    "strict": false, /* Enable all strict type-checking options. */
+    // "noImplicitAny": true,                            /* Enable error reporting for expressions and declarations with an implied 'any' type. */
+    // "strictNullChecks": true,                         /* When type checking, take into account 'null' and 'undefined'. */
+    // "strictFunctionTypes": true,                      /* When assigning functions, check to ensure parameters and the return values are subtype-compatible. */
+    // "strictBindCallApply": true,                      /* Check that the arguments for 'bind', 'call', and 'apply' methods match the original function. */
+    // "strictPropertyInitialization": true,             /* Check for class properties that are declared but not set in the constructor. */
+    // "strictBuiltinIteratorReturn": true,              /* Built-in iterators are instantiated with a 'TReturn' type of 'undefined' instead of 'any'. */
+    // "noImplicitThis": true,                           /* Enable error reporting when 'this' is given the type 'any'. */
+    // "useUnknownInCatchVariables": true,               /* Default catch clause variables as 'unknown' instead of 'any'. */
+    // "alwaysStrict": true,                             /* Ensure 'use strict' is always emitted. */
+    // "noUnusedLocals": true,                           /* Enable error reporting when local variables aren't read. */
+    // "noUnusedParameters": true,                       /* Raise an error when a function parameter isn't read. */
+    // "exactOptionalPropertyTypes": true,               /* Interpret optional property types as written, rather than adding 'undefined'. */
+    // "noImplicitReturns": true,                        /* Enable error reporting for codepaths that do not explicitly return in a function. */
+    // "noFallthroughCasesInSwitch": true,               /* Enable error reporting for fallthrough cases in switch statements. */
+    // "noUncheckedIndexedAccess": true,                 /* Add 'undefined' to a type when accessed using an index. */
+    // "noImplicitOverride": true,                       /* Ensure overriding members in derived classes are marked with an override modifier. */
+    // "noPropertyAccessFromIndexSignature": true,       /* Enforces using indexed accessors for keys declared using an indexed type. */
+    // "allowUnusedLabels": true,                        /* Disable error reporting for unused labels. */
+    // "allowUnreachableCode": true,                     /* Disable error reporting for unreachable code. */
+    /* Completeness */
+    "skipDefaultLibCheck": true, /* Skip type checking .d.ts files that are included with TypeScript. */
+    "skipLibCheck": true /* Skip type checking all .d.ts files. */
+  },
+  "include": ["src"],
+  "exclude": [
+    "node_modules","./node_modules/@roamhq/wrtc"
+  ]
+  //   "include": [
+  //  "./src", "./types"
+  //   ]
+}