├── ui
    ├── src
    │   ├── assets
    │   │   └── .gitkeep
    │   ├── app
    │   │   ├── app.component.css
    │   │   ├── app.component.html
    │   │   ├── call
    │   │   │   ├── Sdp.ts
    │   │   │   ├── call.component.css
    │   │   │   ├── call.component.html
    │   │   │   ├── call.component.spec.ts
    │   │   │   └── call.component.ts
    │   │   ├── app.component.ts
    │   │   ├── app-routing.module.ts
    │   │   ├── app.module.ts
    │   │   └── app.component.spec.ts
    │   ├── favicon.ico
    │   ├── environments
    │   │   ├── environment.prod.ts
    │   │   └── environment.ts
    │   ├── styles.css
    │   ├── index.html
    │   ├── main.ts
    │   ├── test.ts
    │   └── polyfills.ts
    ├── proxyconfig.json
    ├── e2e
    │   ├── tsconfig.json
    │   ├── src
    │   │   ├── app.po.ts
    │   │   └── app.e2e-spec.ts
    │   └── protractor.conf.js
    ├── .editorconfig
    ├── tsconfig.app.json
    ├── tsconfig.spec.json
    ├── browserslist
    ├── tsconfig.json
    ├── .gitignore
    ├── README.md
    ├── karma.conf.js
    ├── package.json
    ├── tslint.json
    └── angular.json
├── server
    ├── .gitignore
    ├── signal.go
    └── main.go
└── README.md


/ui/src/assets/.gitkeep:
--------------------------------------------------------------------------------
1 | 


--------------------------------------------------------------------------------
/ui/src/app/app.component.css:
--------------------------------------------------------------------------------
1 | 


--------------------------------------------------------------------------------
/server/.gitignore:
--------------------------------------------------------------------------------
1 | video
2 | go.mod
3 | go.sum
4 | info.log


--------------------------------------------------------------------------------
/ui/src/app/app.component.html:
--------------------------------------------------------------------------------
1 | <router-outlet></router-outlet>


--------------------------------------------------------------------------------
/ui/src/app/call/Sdp.ts:
--------------------------------------------------------------------------------
1 | export interface Sdp {
2 |     Sdp: string;
3 | }


--------------------------------------------------------------------------------
/ui/src/favicon.ico:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/Ramez-/go-video-conference/HEAD/ui/src/favicon.ico


--------------------------------------------------------------------------------
/ui/src/environments/environment.prod.ts:
--------------------------------------------------------------------------------
1 | export const environment = {
2 |   production: true
3 | };
4 | 


--------------------------------------------------------------------------------
/ui/src/styles.css:
--------------------------------------------------------------------------------
1 | /* You can add global styles to this file, and also import other style files */
2 | 


--------------------------------------------------------------------------------
/ui/src/app/call/call.component.css:
--------------------------------------------------------------------------------
 1 | .layer2 {
 2 |     position: absolute;
 3 |     top: 0;
 4 | }
 5 | 
 6 | .container_row {
 7 |     height: 50px;
 8 |     margin-top: 100px;
 9 |     position: relative;
10 | }


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/ui/proxyconfig.json:
--------------------------------------------------------------------------------
1 | {
2 |     "/webrtc/*": {
3 |     "target": "http://localhost:8080",
4 |     "secure": false,
5 |     "localLever": "debug",
6 |     "changeOrigin": true,
7 |     "logLevel": "debug"
8 |   }
9 | }


--------------------------------------------------------------------------------
/ui/src/app/app.component.ts:
--------------------------------------------------------------------------------
 1 | import { Component } from '@angular/core';
 2 | 
 3 | @Component({
 4 |   selector: 'app-root',
 5 |   templateUrl: './app.component.html',
 6 |   styleUrls: ['./app.component.css']
 7 | })
 8 | export class AppComponent {
 9 |   title = 'ui';
10 | }
11 | 


--------------------------------------------------------------------------------
/ui/e2e/tsconfig.json:
--------------------------------------------------------------------------------
 1 | {
 2 |   "extends": "../tsconfig.json",
 3 |   "compilerOptions": {
 4 |     "outDir": "../out-tsc/e2e",
 5 |     "module": "commonjs",
 6 |     "target": "es5",
 7 |     "types": [
 8 |       "jasmine",
 9 |       "jasminewd2",
10 |       "node"
11 |     ]
12 |   }
13 | }
14 | 


--------------------------------------------------------------------------------
/ui/.editorconfig:
--------------------------------------------------------------------------------
 1 | # Editor configuration, see https://editorconfig.org
 2 | root = true
 3 | 
 4 | [*]
 5 | charset = utf-8
 6 | indent_style = space
 7 | indent_size = 2
 8 | insert_final_newline = true
 9 | trim_trailing_whitespace = true
10 | 
11 | [*.md]
12 | max_line_length = off
13 | trim_trailing_whitespace = false
14 | 


--------------------------------------------------------------------------------
/ui/e2e/src/app.po.ts:
--------------------------------------------------------------------------------
 1 | import { browser, by, element } from 'protractor';
 2 | 
 3 | export class AppPage {
 4 |   navigateTo() {
 5 |     return browser.get(browser.baseUrl) as Promise<any>;
 6 |   }
 7 | 
 8 |   getTitleText() {
 9 |     return element(by.css('app-root .content span')).getText() as Promise<string>;
10 |   }
11 | }
12 | 


--------------------------------------------------------------------------------
/ui/src/index.html:
--------------------------------------------------------------------------------
 1 | <!doctype html>
 2 | <html lang="en">
 3 | <head>
 4 |   <meta charset="utf-8">
 5 |   <title>Ui</title>
 6 |   <base href="/">
 7 |   <meta name="viewport" content="width=device-width, initial-scale=1">
 8 |   <link rel="icon" type="image/x-icon" href="favicon.ico">
 9 | </head>
10 | <body>
11 |   <app-root></app-root>
12 | </body>
13 | </html>
14 | 


--------------------------------------------------------------------------------
/ui/tsconfig.app.json:
--------------------------------------------------------------------------------
 1 | {
 2 |   "extends": "./tsconfig.json",
 3 |   "compilerOptions": {
 4 |     "outDir": "./out-tsc/app",
 5 |     "types": []
 6 |   },
 7 |   "files": [
 8 |     "src/main.ts",
 9 |     "src/polyfills.ts"
10 |   ],
11 |   "include": [
12 |     "src/**/*.ts"
13 |   ],
14 |   "exclude": [
15 |     "src/test.ts",
16 |     "src/**/*.spec.ts"
17 |   ]
18 | }
19 | 


--------------------------------------------------------------------------------
/ui/tsconfig.spec.json:
--------------------------------------------------------------------------------
 1 | {
 2 |   "extends": "./tsconfig.json",
 3 |   "compilerOptions": {
 4 |     "outDir": "./out-tsc/spec",
 5 |     "types": [
 6 |       "jasmine",
 7 |       "node"
 8 |     ]
 9 |   },
10 |   "files": [
11 |     "src/test.ts",
12 |     "src/polyfills.ts"
13 |   ],
14 |   "include": [
15 |     "src/**/*.spec.ts",
16 |     "src/**/*.d.ts"
17 |   ]
18 | }
19 | 


--------------------------------------------------------------------------------
/ui/src/app/call/call.component.html:
--------------------------------------------------------------------------------
 1 | <button (click)="startCall()" class="start-call">
 2 |     Start the call!
 3 |   </button>
 4 | 
 5 |   <div class="container_row">
 6 |     <video autoplay id="senderVideo" width="500" height="500" controls muted></video>
 7 |     <div class="layer2">
 8 |       <video autoplay id="receiverVideo" width="160" height="120" controls muted></video>
 9 |     </div>
10 |   </div>


--------------------------------------------------------------------------------
/ui/src/app/app-routing.module.ts:
--------------------------------------------------------------------------------
 1 | import { NgModule } from '@angular/core';
 2 | import { Routes, RouterModule } from '@angular/router';
 3 | import { CallComponent } from './call/call.component';
 4 | 
 5 | 
 6 | const routes: Routes = [{path: 'call', component: CallComponent }];
 7 | 
 8 | @NgModule({
 9 |   imports: [RouterModule.forRoot(routes)],
10 |   exports: [RouterModule]
11 | })
12 | export class AppRoutingModule { }
13 | 


--------------------------------------------------------------------------------
/ui/src/main.ts:
--------------------------------------------------------------------------------
 1 | import { enableProdMode } from '@angular/core';
 2 | import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
 3 | 
 4 | import { AppModule } from './app/app.module';
 5 | import { environment } from './environments/environment';
 6 | 
 7 | if (environment.production) {
 8 |   enableProdMode();
 9 | }
10 | 
11 | platformBrowserDynamic().bootstrapModule(AppModule)
12 |   .catch(err => console.error(err));
13 | 


--------------------------------------------------------------------------------
/ui/browserslist:
--------------------------------------------------------------------------------
 1 | # This file is used by the build system to adjust CSS and JS output to support the specified browsers below.
 2 | # For additional information regarding the format and rule options, please see:
 3 | # https://github.com/browserslist/browserslist#queries
 4 | 
 5 | # You can see what browsers were selected by your queries by running:
 6 | #   npx browserslist
 7 | 
 8 | > 0.5%
 9 | last 2 versions
10 | Firefox ESR
11 | not dead
12 | not IE 9-11 # For IE 9-11 support, remove 'not'.


--------------------------------------------------------------------------------
/README.md:
--------------------------------------------------------------------------------
 1 | # go-video-confrence
 2 | Create a video conference application using Golang.
 3 | 
 4 | This repository is part of a [medium post tutorial](https://medium.com/@ramezemadaiesec/from-zero-to-fully-functional-video-conference-app-using-go-and-webrtc-7d073c9287da)
 5 | for creating a fully functional video confrence application from the complete beginning using webRTC in under 100 lines of code.
 6 | 
 7 | ## Technologies used
 8 | 
 9 | * [Golang](https://github.com/golang/go)
10 | * [Pion](https://github.com/pion/webrtc)
11 | * [Gin](https://github.com/gin-gonic/gin)
12 | * [Angular](https://github.com/angular/angular)
13 | 


--------------------------------------------------------------------------------
/ui/src/app/app.module.ts:
--------------------------------------------------------------------------------
 1 | import { BrowserModule } from '@angular/platform-browser';
 2 | import { NgModule } from '@angular/core';
 3 | import { HttpClientModule } from '@angular/common/http';
 4 | 
 5 | import { AppRoutingModule } from './app-routing.module';
 6 | import { AppComponent } from './app.component';
 7 | import { CallComponent } from './call/call.component';
 8 | 
 9 | @NgModule({
10 |   declarations: [
11 |     AppComponent,
12 |     CallComponent
13 |   ],
14 |   imports: [
15 |     BrowserModule,
16 |     AppRoutingModule,
17 |     HttpClientModule
18 |   ],
19 |   providers: [],
20 |   bootstrap: [AppComponent]
21 | })
22 | export class AppModule { }
23 | 


--------------------------------------------------------------------------------
/ui/tsconfig.json:
--------------------------------------------------------------------------------
 1 | {
 2 |   "compileOnSave": false,
 3 |   "compilerOptions": {
 4 |     "baseUrl": "./",
 5 |     "outDir": "./dist/out-tsc",
 6 |     "sourceMap": true,
 7 |     "declaration": false,
 8 |     "downlevelIteration": true,
 9 |     "experimentalDecorators": true,
10 |     "module": "esnext",
11 |     "moduleResolution": "node",
12 |     "importHelpers": true,
13 |     "target": "es2015",
14 |     "typeRoots": [
15 |       "node_modules/@types"
16 |     ],
17 |     "lib": [
18 |       "es2018",
19 |       "dom"
20 |     ]
21 |   },
22 |   "angularCompilerOptions": {
23 |     "fullTemplateTypeCheck": true,
24 |     "strictInjectionParameters": true
25 |   }
26 | }
27 | 


--------------------------------------------------------------------------------
/ui/src/test.ts:
--------------------------------------------------------------------------------
 1 | // This file is required by karma.conf.js and loads recursively all the .spec and framework files
 2 | 
 3 | import 'zone.js/dist/zone-testing';
 4 | import { getTestBed } from '@angular/core/testing';
 5 | import {
 6 |   BrowserDynamicTestingModule,
 7 |   platformBrowserDynamicTesting
 8 | } from '@angular/platform-browser-dynamic/testing';
 9 | 
10 | declare const require: any;
11 | 
12 | // First, initialize the Angular testing environment.
13 | getTestBed().initTestEnvironment(
14 |   BrowserDynamicTestingModule,
15 |   platformBrowserDynamicTesting()
16 | );
17 | // Then we find all the tests.
18 | const context = require.context('./', true, /\.spec\.ts$/);
19 | // And load the modules.
20 | context.keys().map(context);
21 | 


--------------------------------------------------------------------------------
/ui/e2e/src/app.e2e-spec.ts:
--------------------------------------------------------------------------------
 1 | import { AppPage } from './app.po';
 2 | import { browser, logging } from 'protractor';
 3 | 
 4 | describe('workspace-project App', () => {
 5 |   let page: AppPage;
 6 | 
 7 |   beforeEach(() => {
 8 |     page = new AppPage();
 9 |   });
10 | 
11 |   it('should display welcome message', () => {
12 |     page.navigateTo();
13 |     expect(page.getTitleText()).toEqual('ui app is running!');
14 |   });
15 | 
16 |   afterEach(async () => {
17 |     // Assert that there are no errors emitted from the browser
18 |     const logs = await browser.manage().logs().get(logging.Type.BROWSER);
19 |     expect(logs).not.toContain(jasmine.objectContaining({
20 |       level: logging.Level.SEVERE,
21 |     } as logging.Entry));
22 |   });
23 | });
24 | 


--------------------------------------------------------------------------------
/ui/src/app/call/call.component.spec.ts:
--------------------------------------------------------------------------------
 1 | import { async, ComponentFixture, TestBed } from '@angular/core/testing';
 2 | 
 3 | import { CallComponent } from './call.component';
 4 | 
 5 | describe('CallComponent', () => {
 6 |   let component: CallComponent;
 7 |   let fixture: ComponentFixture<CallComponent>;
 8 | 
 9 |   beforeEach(async(() => {
10 |     TestBed.configureTestingModule({
11 |       declarations: [ CallComponent ]
12 |     })
13 |     .compileComponents();
14 |   }));
15 | 
16 |   beforeEach(() => {
17 |     fixture = TestBed.createComponent(CallComponent);
18 |     component = fixture.componentInstance;
19 |     fixture.detectChanges();
20 |   });
21 | 
22 |   it('should create', () => {
23 |     expect(component).toBeTruthy();
24 |   });
25 | });
26 | 


--------------------------------------------------------------------------------
/ui/src/environments/environment.ts:
--------------------------------------------------------------------------------
 1 | // This file can be replaced during build by using the `fileReplacements` array.
 2 | // `ng build --prod` replaces `environment.ts` with `environment.prod.ts`.
 3 | // The list of file replacements can be found in `angular.json`.
 4 | 
 5 | export const environment = {
 6 |   production: false
 7 | };
 8 | 
 9 | /*
10 |  * For easier debugging in development mode, you can import the following file
11 |  * to ignore zone related error stack frames such as `zone.run`, `zoneDelegate.invokeTask`.
12 |  *
13 |  * This import should be commented out in production mode because it will have a negative impact
14 |  * on performance if an error is thrown.
15 |  */
16 | // import 'zone.js/dist/zone-error';  // Included with Angular CLI.
17 | 


--------------------------------------------------------------------------------
/ui/.gitignore:
--------------------------------------------------------------------------------
 1 | # See http://help.github.com/ignore-files/ for more about ignoring files.
 2 | 
 3 | # compiled output
 4 | /dist
 5 | /tmp
 6 | /out-tsc
 7 | # Only exists if Bazel was run
 8 | /bazel-out
 9 | 
10 | # dependencies
11 | /node_modules
12 | 
13 | # profiling files
14 | chrome-profiler-events*.json
15 | speed-measure-plugin*.json
16 | 
17 | # IDEs and editors
18 | /.idea
19 | .project
20 | .classpath
21 | .c9/
22 | *.launch
23 | .settings/
24 | *.sublime-workspace
25 | 
26 | # IDE - VSCode
27 | .vscode/*
28 | !.vscode/settings.json
29 | !.vscode/tasks.json
30 | !.vscode/launch.json
31 | !.vscode/extensions.json
32 | .history/*
33 | 
34 | # misc
35 | /.sass-cache
36 | /connect.lock
37 | /coverage
38 | /libpeerconnection.log
39 | npm-debug.log
40 | yarn-error.log
41 | testem.log
42 | /typings
43 | 
44 | # System Files
45 | .DS_Store
46 | Thumbs.db
47 | 


--------------------------------------------------------------------------------
/ui/e2e/protractor.conf.js:
--------------------------------------------------------------------------------
 1 | // @ts-check
 2 | // Protractor configuration file, see link for more information
 3 | // https://github.com/angular/protractor/blob/master/lib/config.ts
 4 | 
 5 | const { SpecReporter } = require('jasmine-spec-reporter');
 6 | 
 7 | /**
 8 |  * @type { import("protractor").Config }
 9 |  */
10 | exports.config = {
11 |   allScriptsTimeout: 11000,
12 |   specs: [
13 |     './src/**/*.e2e-spec.ts'
14 |   ],
15 |   capabilities: {
16 |     'browserName': 'chrome'
17 |   },
18 |   directConnect: true,
19 |   baseUrl: 'http://localhost:4200/',
20 |   framework: 'jasmine',
21 |   jasmineNodeOpts: {
22 |     showColors: true,
23 |     defaultTimeoutInterval: 30000,
24 |     print: function() {}
25 |   },
26 |   onPrepare() {
27 |     require('ts-node').register({
28 |       project: require('path').join(__dirname, './tsconfig.json')
29 |     });
30 |     jasmine.getEnv().addReporter(new SpecReporter({ spec: { displayStacktrace: true } }));
31 |   }
32 | };


--------------------------------------------------------------------------------
/ui/README.md:
--------------------------------------------------------------------------------
 1 | # Ui
 2 | 
 3 | This project was generated with [Angular CLI](https://github.com/angular/angular-cli) version 8.3.3.
 4 | 
 5 | ## Development server
 6 | 
 7 | Run `ng serve` for a dev server. Navigate to `http://localhost:4200/`. The app will automatically reload if you change any of the source files.
 8 | 
 9 | ## Code scaffolding
10 | 
11 | Run `ng generate component component-name` to generate a new component. You can also use `ng generate directive|pipe|service|class|guard|interface|enum|module`.
12 | 
13 | ## Build
14 | 
15 | Run `ng build` to build the project. The build artifacts will be stored in the `dist/` directory. Use the `--prod` flag for a production build.
16 | 
17 | ## Running unit tests
18 | 
19 | Run `ng test` to execute the unit tests via [Karma](https://karma-runner.github.io).
20 | 
21 | ## Running end-to-end tests
22 | 
23 | Run `ng e2e` to execute the end-to-end tests via [Protractor](http://www.protractortest.org/).
24 | 
25 | ## Further help
26 | 
27 | To get more help on the Angular CLI use `ng help` or go check out the [Angular CLI README](https://github.com/angular/angular-cli/blob/master/README.md).
28 | 


--------------------------------------------------------------------------------
/ui/karma.conf.js:
--------------------------------------------------------------------------------
 1 | // Karma configuration file, see link for more information
 2 | // https://karma-runner.github.io/1.0/config/configuration-file.html
 3 | 
 4 | module.exports = function (config) {
 5 |   config.set({
 6 |     basePath: '',
 7 |     frameworks: ['jasmine', '@angular-devkit/build-angular'],
 8 |     plugins: [
 9 |       require('karma-jasmine'),
10 |       require('karma-chrome-launcher'),
11 |       require('karma-jasmine-html-reporter'),
12 |       require('karma-coverage-istanbul-reporter'),
13 |       require('@angular-devkit/build-angular/plugins/karma')
14 |     ],
15 |     client: {
16 |       clearContext: false // leave Jasmine Spec Runner output visible in browser
17 |     },
18 |     coverageIstanbulReporter: {
19 |       dir: require('path').join(__dirname, './coverage/ui'),
20 |       reports: ['html', 'lcovonly', 'text-summary'],
21 |       fixWebpackSourcePaths: true
22 |     },
23 |     reporters: ['progress', 'kjhtml'],
24 |     port: 9876,
25 |     colors: true,
26 |     logLevel: config.LOG_INFO,
27 |     autoWatch: true,
28 |     browsers: ['Chrome'],
29 |     singleRun: false,
30 |     restartOnFileChange: true
31 |   });
32 | };
33 | 


--------------------------------------------------------------------------------
/ui/src/app/app.component.spec.ts:
--------------------------------------------------------------------------------
 1 | import { TestBed, async } from '@angular/core/testing';
 2 | import { RouterTestingModule } from '@angular/router/testing';
 3 | import { AppComponent } from './app.component';
 4 | 
 5 | describe('AppComponent', () => {
 6 |   beforeEach(async(() => {
 7 |     TestBed.configureTestingModule({
 8 |       imports: [
 9 |         RouterTestingModule
10 |       ],
11 |       declarations: [
12 |         AppComponent
13 |       ],
14 |     }).compileComponents();
15 |   }));
16 | 
17 |   it('should create the app', () => {
18 |     const fixture = TestBed.createComponent(AppComponent);
19 |     const app = fixture.debugElement.componentInstance;
20 |     expect(app).toBeTruthy();
21 |   });
22 | 
23 |   it(`should have as title 'ui'`, () => {
24 |     const fixture = TestBed.createComponent(AppComponent);
25 |     const app = fixture.debugElement.componentInstance;
26 |     expect(app.title).toEqual('ui');
27 |   });
28 | 
29 |   it('should render title', () => {
30 |     const fixture = TestBed.createComponent(AppComponent);
31 |     fixture.detectChanges();
32 |     const compiled = fixture.debugElement.nativeElement;
33 |     expect(compiled.querySelector('.content span').textContent).toContain('ui app is running!');
34 |   });
35 | });
36 | 


--------------------------------------------------------------------------------
/ui/package.json:
--------------------------------------------------------------------------------
 1 | {
 2 |   "name": "ui",
 3 |   "version": "0.0.0",
 4 |   "scripts": {
 5 |     "ng": "ng",
 6 |     "start": "ng serve",
 7 |     "build": "ng build",
 8 |     "test": "ng test",
 9 |     "lint": "ng lint",
10 |     "e2e": "ng e2e"
11 |   },
12 |   "private": true,
13 |   "dependencies": {
14 |     "@angular/animations": "~8.2.4",
15 |     "@angular/common": "~8.2.4",
16 |     "@angular/compiler": "~8.2.4",
17 |     "@angular/core": "~8.2.4",
18 |     "@angular/forms": "~8.2.4",
19 |     "@angular/platform-browser": "~8.2.4",
20 |     "@angular/platform-browser-dynamic": "~8.2.4",
21 |     "@angular/router": "~8.2.4",
22 |     "rxjs": "~6.4.0",
23 |     "tslib": "^1.10.0",
24 |     "zone.js": "~0.9.1"
25 |   },
26 |   "devDependencies": {
27 |     "@angular-devkit/build-angular": "~0.803.3",
28 |     "@angular/cli": "~8.3.3",
29 |     "@angular/compiler-cli": "~8.2.4",
30 |     "@angular/language-service": "~8.2.4",
31 |     "@types/node": "~8.9.4",
32 |     "@types/jasmine": "~3.3.8",
33 |     "@types/jasminewd2": "~2.0.3",
34 |     "codelyzer": "^5.0.0",
35 |     "jasmine-core": "~3.4.0",
36 |     "jasmine-spec-reporter": "~4.2.1",
37 |     "karma": "~4.1.0",
38 |     "karma-chrome-launcher": "~2.2.0",
39 |     "karma-coverage-istanbul-reporter": "~2.0.1",
40 |     "karma-jasmine": "~2.0.1",
41 |     "karma-jasmine-html-reporter": "^1.4.0",
42 |     "protractor": "~5.4.0",
43 |     "ts-node": "~7.0.0",
44 |     "tslint": "~5.15.0",
45 |     "typescript": "~3.5.3"
46 |   }
47 | }
48 | 


--------------------------------------------------------------------------------
/server/signal.go:
--------------------------------------------------------------------------------
  1 | // Package signal contains helpers to exchange the SDP session
  2 | // description between examples.
  3 | package main
  4 | 
  5 | import (
  6 | 	"bufio"
  7 | 	"bytes"
  8 | 	"compress/gzip"
  9 | 	"encoding/base64"
 10 | 	"encoding/json"
 11 | 	"fmt"
 12 | 	"io"
 13 | 	"io/ioutil"
 14 | 	"os"
 15 | 	"strings"
 16 | )
 17 | 
 18 | // Allows compressing offer/answer to bypass terminal input limits.
 19 | const compress = false
 20 | 
 21 | // MustReadStdin blocks until input is received from stdin
 22 | func MustReadStdin() string {
 23 | 	r := bufio.NewReader(os.Stdin)
 24 | 
 25 | 	var in string
 26 | 	for {
 27 | 		var err error
 28 | 		in, err = r.ReadString('\n')
 29 | 		if err != io.EOF {
 30 | 			if err != nil {
 31 | 				panic(err)
 32 | 			}
 33 | 		}
 34 | 		in = strings.TrimSpace(in)
 35 | 		if len(in) > 0 {
 36 | 			break
 37 | 		}
 38 | 	}
 39 | 
 40 | 	fmt.Println("")
 41 | 
 42 | 	return in
 43 | }
 44 | 
 45 | // Encode encodes the input in base64
 46 | // It can optionally zip the input before encoding
 47 | func Encode(obj interface{}) string {
 48 | 	b, err := json.Marshal(obj)
 49 | 	if err != nil {
 50 | 		panic(err)
 51 | 	}
 52 | 
 53 | 	if compress {
 54 | 		b = zip(b)
 55 | 	}
 56 | 
 57 | 	return base64.StdEncoding.EncodeToString(b)
 58 | }
 59 | 
 60 | // Decode decodes the input from base64
 61 | // It can optionally unzip the input after decoding
 62 | func Decode(in string, obj interface{}) {
 63 | 	b, err := base64.StdEncoding.DecodeString(in)
 64 | 	if err != nil {
 65 | 		panic(err)
 66 | 	}
 67 | 
 68 | 	if compress {
 69 | 		b = unzip(b)
 70 | 	}
 71 | 
 72 | 	err = json.Unmarshal(b, obj)
 73 | 	if err != nil {
 74 | 		panic(err)
 75 | 	}
 76 | }
 77 | 
 78 | func zip(in []byte) []byte {
 79 | 	var b bytes.Buffer
 80 | 	gz := gzip.NewWriter(&b)
 81 | 	_, err := gz.Write(in)
 82 | 	if err != nil {
 83 | 		panic(err)
 84 | 	}
 85 | 	err = gz.Flush()
 86 | 	if err != nil {
 87 | 		panic(err)
 88 | 	}
 89 | 	err = gz.Close()
 90 | 	if err != nil {
 91 | 		panic(err)
 92 | 	}
 93 | 	return b.Bytes()
 94 | }
 95 | 
 96 | func unzip(in []byte) []byte {
 97 | 	var b bytes.Buffer
 98 | 	_, err := b.Write(in)
 99 | 	if err != nil {
100 | 		panic(err)
101 | 	}
102 | 	r, err := gzip.NewReader(&b)
103 | 	if err != nil {
104 | 		panic(err)
105 | 	}
106 | 	res, err := ioutil.ReadAll(r)
107 | 	if err != nil {
108 | 		panic(err)
109 | 	}
110 | 	return res
111 | }
112 | 


--------------------------------------------------------------------------------
/ui/tslint.json:
--------------------------------------------------------------------------------
 1 | {
 2 |   "extends": "tslint:recommended",
 3 |   "rules": {
 4 |     "array-type": false,
 5 |     "arrow-parens": false,
 6 |     "deprecation": {
 7 |       "severity": "warning"
 8 |     },
 9 |     "component-class-suffix": true,
10 |     "contextual-lifecycle": true,
11 |     "directive-class-suffix": true,
12 |     "directive-selector": [
13 |       true,
14 |       "attribute",
15 |       "app",
16 |       "camelCase"
17 |     ],
18 |     "component-selector": [
19 |       true,
20 |       "element",
21 |       "app",
22 |       "kebab-case"
23 |     ],
24 |     "import-blacklist": [
25 |       true,
26 |       "rxjs/Rx"
27 |     ],
28 |     "interface-name": false,
29 |     "max-classes-per-file": false,
30 |     "max-line-length": [
31 |       true,
32 |       140
33 |     ],
34 |     "member-access": false,
35 |     "member-ordering": [
36 |       true,
37 |       {
38 |         "order": [
39 |           "static-field",
40 |           "instance-field",
41 |           "static-method",
42 |           "instance-method"
43 |         ]
44 |       }
45 |     ],
46 |     "no-consecutive-blank-lines": false,
47 |     "no-console": [
48 |       true,
49 |       "debug",
50 |       "info",
51 |       "time",
52 |       "timeEnd",
53 |       "trace"
54 |     ],
55 |     "no-empty": false,
56 |     "no-inferrable-types": [
57 |       true,
58 |       "ignore-params"
59 |     ],
60 |     "no-non-null-assertion": true,
61 |     "no-redundant-jsdoc": true,
62 |     "no-switch-case-fall-through": true,
63 |     "no-use-before-declare": true,
64 |     "no-var-requires": false,
65 |     "object-literal-key-quotes": [
66 |       true,
67 |       "as-needed"
68 |     ],
69 |     "object-literal-sort-keys": false,
70 |     "ordered-imports": false,
71 |     "quotemark": [
72 |       true,
73 |       "single"
74 |     ],
75 |     "trailing-comma": false,
76 |     "no-conflicting-lifecycle": true,
77 |     "no-host-metadata-property": true,
78 |     "no-input-rename": true,
79 |     "no-inputs-metadata-property": true,
80 |     "no-output-native": true,
81 |     "no-output-on-prefix": true,
82 |     "no-output-rename": true,
83 |     "no-outputs-metadata-property": true,
84 |     "template-banana-in-box": true,
85 |     "template-no-negated-async": true,
86 |     "use-lifecycle-interface": true,
87 |     "use-pipe-transform-interface": true
88 |   },
89 |   "rulesDirectory": [
90 |     "codelyzer"
91 |   ]
92 | }


--------------------------------------------------------------------------------
/ui/src/polyfills.ts:
--------------------------------------------------------------------------------
 1 | /**
 2 |  * This file includes polyfills needed by Angular and is loaded before the app.
 3 |  * You can add your own extra polyfills to this file.
 4 |  *
 5 |  * This file is divided into 2 sections:
 6 |  *   1. Browser polyfills. These are applied before loading ZoneJS and are sorted by browsers.
 7 |  *   2. Application imports. Files imported after ZoneJS that should be loaded before your main
 8 |  *      file.
 9 |  *
10 |  * The current setup is for so-called "evergreen" browsers; the last versions of browsers that
11 |  * automatically update themselves. This includes Safari >= 10, Chrome >= 55 (including Opera),
12 |  * Edge >= 13 on the desktop, and iOS 10 and Chrome on mobile.
13 |  *
14 |  * Learn more in https://angular.io/guide/browser-support
15 |  */
16 | 
17 | /***************************************************************************************************
18 |  * BROWSER POLYFILLS
19 |  */
20 | 
21 | /** IE10 and IE11 requires the following for NgClass support on SVG elements */
22 | // import 'classlist.js';  // Run `npm install --save classlist.js`.
23 | 
24 | /**
25 |  * Web Animations `@angular/platform-browser/animations`
26 |  * Only required if AnimationBuilder is used within the application and using IE/Edge or Safari.
27 |  * Standard animation support in Angular DOES NOT require any polyfills (as of Angular 6.0).
28 |  */
29 | // import 'web-animations-js';  // Run `npm install --save web-animations-js`.
30 | 
31 | /**
32 |  * By default, zone.js will patch all possible macroTask and DomEvents
33 |  * user can disable parts of macroTask/DomEvents patch by setting following flags
34 |  * because those flags need to be set before `zone.js` being loaded, and webpack
35 |  * will put import in the top of bundle, so user need to create a separate file
36 |  * in this directory (for example: zone-flags.ts), and put the following flags
37 |  * into that file, and then add the following code before importing zone.js.
38 |  * import './zone-flags.ts';
39 |  *
40 |  * The flags allowed in zone-flags.ts are listed here.
41 |  *
42 |  * The following flags will work for all browsers.
43 |  *
44 |  * (window as any).__Zone_disable_requestAnimationFrame = true; // disable patch requestAnimationFrame
45 |  * (window as any).__Zone_disable_on_property = true; // disable patch onProperty such as onclick
46 |  * (window as any).__zone_symbol__UNPATCHED_EVENTS = ['scroll', 'mousemove']; // disable patch specified eventNames
47 |  *
48 |  *  in IE/Edge developer tools, the addEventListener will also be wrapped by zone.js
49 |  *  with the following flag, it will bypass `zone.js` patch for IE/Edge
50 |  *
51 |  *  (window as any).__Zone_enable_cross_context_check = true;
52 |  *
53 |  */
54 | 
55 | /***************************************************************************************************
56 |  * Zone JS is required by default for Angular itself.
57 |  */
58 | import 'zone.js/dist/zone';  // Included with Angular CLI.
59 | 
60 | 
61 | /***************************************************************************************************
62 |  * APPLICATION IMPORTS
63 |  */
64 | 


--------------------------------------------------------------------------------
/ui/src/app/call/call.component.ts:
--------------------------------------------------------------------------------
 1 | import { Component, OnInit } from '@angular/core';
 2 | import { HttpClient } from '@angular/common/http';
 3 | import { Sdp } from './Sdp';
 4 | import { ActivatedRoute } from "@angular/router";
 5 | 
 6 | @Component({
 7 |   selector: 'app-call',
 8 |   templateUrl: './call.component.html',
 9 |   styleUrls: ['./call.component.css']
10 | })
11 | export class CallComponent implements OnInit {
12 | 
13 |   constructor(private http: HttpClient, private route: ActivatedRoute) { }
14 | 
15 |   pcSender : any
16 |   pcReciever :any
17 |   meetingId: string
18 |   peerId: string
19 |   userId: string
20 | 
21 |   ngOnInit() {
22 |     // use http://localhost:4200/call;meetingId=07927fc8-af0a-11ea-b338-064f26a5f90a;userId=alice;peerId=bob
23 |     // and http://localhost:4200/call;meetingId=07927fc8-af0a-11ea-b338-064f26a5f90a;userId=bob;peerId=alice
24 |     // start the call
25 |     this.meetingId = this.route.snapshot.paramMap.get("meetingId");
26 |     this.peerId = this.route.snapshot.paramMap.get("peerId");
27 |     this.userId = this.route.snapshot.paramMap.get("userId")
28 | 
29 |     this.pcSender = new RTCPeerConnection({
30 |       iceServers: [
31 |         {
32 |           urls: 'stun:stun.l.google.com:19302'
33 |         }
34 |       ]
35 |     })
36 |     this.pcReciever = new RTCPeerConnection({
37 |       iceServers: [
38 |         {
39 |           urls: 'stun:stun.l.google.com:19302'
40 |         }
41 |       ]
42 |     })
43 | 
44 |     this.pcSender.onicecandidate = event => {
45 |       if (event.candidate === null) {
46 |         this.http.post<Sdp>('/webrtc/sdp/m/' + this.meetingId + "/c/"+ this.userId + "/p/" + this.peerId + "/s/" + true,
47 |         {"sdp" : btoa(JSON.stringify(this.pcSender.localDescription))}).subscribe(response => {
48 |           this.pcSender.setRemoteDescription(new RTCSessionDescription(JSON.parse(atob(response.Sdp))))
49 |         });
50 |       }
51 |     }
52 |     this.pcReciever.onicecandidate = event => {
53 |       if (event.candidate === null) {
54 |           this.http.post<Sdp>('/webrtc/sdp/m/' + this.meetingId + "/c/"+ this.userId + "/p/" + this.peerId + "/s/" + false, 
55 |           {"sdp" : btoa(JSON.stringify(this.pcReciever.localDescription))}).subscribe(response => {
56 |           this.pcReciever.setRemoteDescription(new RTCSessionDescription(JSON.parse(atob(response.Sdp))))
57 |         })
58 |       }
59 |     }
60 |   }
61 | 
62 |   startCall() {
63 |     // sender part of the call
64 |     navigator.mediaDevices.getUserMedia({video: true, audio: true}).then((stream) =>{
65 |       var senderVideo :any = document.getElementById('senderVideo');
66 |       senderVideo.srcObject = stream;
67 |       var tracks = stream.getTracks();
68 |       for (var i = 0; i < tracks.length; i++) {
69 |         this.pcSender.addTrack(stream.getTracks()[i]);
70 |       }
71 |       this.pcSender.createOffer().then(d => this.pcSender.setLocalDescription(d))
72 |     })
73 |     // you can use event listner so that you inform he is connected!
74 |     this.pcSender.addEventListener('connectionstatechange', event => {
75 |       if (this.pcSender.connectionState === 'connected') {
76 |           console.log("horray!")
77 |       }
78 |     });
79 | 
80 |   // receiver part of the call
81 |   this.pcReciever.addTransceiver('video', {'direction': 'recvonly'})
82 | 
83 |   this.pcReciever.createOffer()
84 |     .then(d => this.pcReciever.setLocalDescription(d))
85 | 
86 |   this.pcReciever.ontrack = function (event) {
87 |     var receiverVideo :any = document.getElementById('receiverVideo')
88 |     receiverVideo.srcObject = event.streams[0]
89 |     receiverVideo.autoplay = true
90 |     receiverVideo.controls = true
91 |   }
92 | 
93 |   }
94 | 
95 | }
96 | 


--------------------------------------------------------------------------------
/ui/angular.json:
--------------------------------------------------------------------------------
  1 | {
  2 |   "$schema": "./node_modules/@angular/cli/lib/config/schema.json",
  3 |   "version": 1,
  4 |   "newProjectRoot": "projects",
  5 |   "projects": {
  6 |     "ui": {
  7 |       "projectType": "application",
  8 |       "schematics": {},
  9 |       "root": "",
 10 |       "sourceRoot": "src",
 11 |       "prefix": "app",
 12 |       "architect": {
 13 |         "build": {
 14 |           "builder": "@angular-devkit/build-angular:browser",
 15 |           "options": {
 16 |             "outputPath": "dist/ui",
 17 |             "index": "src/index.html",
 18 |             "main": "src/main.ts",
 19 |             "polyfills": "src/polyfills.ts",
 20 |             "tsConfig": "tsconfig.app.json",
 21 |             "aot": false,
 22 |             "assets": [
 23 |               "src/favicon.ico",
 24 |               "src/assets"
 25 |             ],
 26 |             "styles": [
 27 |               "src/styles.css"
 28 |             ],
 29 |             "scripts": []
 30 |           },
 31 |           "configurations": {
 32 |             "production": {
 33 |               "fileReplacements": [
 34 |                 {
 35 |                   "replace": "src/environments/environment.ts",
 36 |                   "with": "src/environments/environment.prod.ts"
 37 |                 }
 38 |               ],
 39 |               "optimization": true,
 40 |               "outputHashing": "all",
 41 |               "sourceMap": false,
 42 |               "extractCss": true,
 43 |               "namedChunks": false,
 44 |               "aot": true,
 45 |               "extractLicenses": true,
 46 |               "vendorChunk": false,
 47 |               "buildOptimizer": true,
 48 |               "budgets": [
 49 |                 {
 50 |                   "type": "initial",
 51 |                   "maximumWarning": "2mb",
 52 |                   "maximumError": "5mb"
 53 |                 },
 54 |                 {
 55 |                   "type": "anyComponentStyle",
 56 |                   "maximumWarning": "6kb",
 57 |                   "maximumError": "10kb"
 58 |                 }
 59 |               ]
 60 |             }
 61 |           }
 62 |         },
 63 |         "serve": {
 64 |           "builder": "@angular-devkit/build-angular:dev-server",
 65 |           "options": {
 66 |             "browserTarget": "ui:build",
 67 |             "proxyConfig": "proxyconfig.json"
 68 |           },
 69 |           "configurations": {
 70 |             "production": {
 71 |               "browserTarget": "ui:build:production"
 72 |             }
 73 |           }
 74 |         },
 75 |         "extract-i18n": {
 76 |           "builder": "@angular-devkit/build-angular:extract-i18n",
 77 |           "options": {
 78 |             "browserTarget": "ui:build"
 79 |           }
 80 |         },
 81 |         "test": {
 82 |           "builder": "@angular-devkit/build-angular:karma",
 83 |           "options": {
 84 |             "main": "src/test.ts",
 85 |             "polyfills": "src/polyfills.ts",
 86 |             "tsConfig": "tsconfig.spec.json",
 87 |             "karmaConfig": "karma.conf.js",
 88 |             "assets": [
 89 |               "src/favicon.ico",
 90 |               "src/assets"
 91 |             ],
 92 |             "styles": [
 93 |               "src/styles.css"
 94 |             ],
 95 |             "scripts": []
 96 |           }
 97 |         },
 98 |         "lint": {
 99 |           "builder": "@angular-devkit/build-angular:tslint",
100 |           "options": {
101 |             "tsConfig": [
102 |               "tsconfig.app.json",
103 |               "tsconfig.spec.json",
104 |               "e2e/tsconfig.json"
105 |             ],
106 |             "exclude": [
107 |               "**/node_modules/**"
108 |             ]
109 |           }
110 |         },
111 |         "e2e": {
112 |           "builder": "@angular-devkit/build-angular:protractor",
113 |           "options": {
114 |             "protractorConfig": "e2e/protractor.conf.js",
115 |             "devServerTarget": "ui:serve"
116 |           },
117 |           "configurations": {
118 |             "production": {
119 |               "devServerTarget": "ui:serve:production"
120 |             }
121 |           }
122 |         }
123 |       }
124 |     }},
125 |   "defaultProject": "ui"
126 | }


--------------------------------------------------------------------------------
/server/main.go:
--------------------------------------------------------------------------------
  1 | package main
  2 | 
  3 | import (
  4 | 	"fmt"
  5 | 	"io"
  6 | 	"log"
  7 | 	"net/http"
  8 | 	"os"
  9 | 	"strconv"
 10 | 	"time"
 11 | 
 12 | 	"github.com/gin-gonic/gin"
 13 | 	"github.com/pion/rtcp"
 14 | 	"github.com/pion/webrtc/v2"
 15 | )
 16 | 
 17 | const (
 18 | 	rtcpPLIInterval = time.Second * 3
 19 | )
 20 | 
 21 | // Sdp represent session description protocol describe media communication sessions
 22 | type Sdp struct {
 23 | 	Sdp string
 24 | }
 25 | 
 26 | func main() {
 27 | 	file, err := os.OpenFile("info.log", os.O_CREATE|os.O_APPEND|os.O_WRONLY, 0644)
 28 | 	if err != nil {
 29 | 		log.Fatal(err)
 30 | 	}
 31 | 	defer file.Close()
 32 | 	log.SetOutput(file)
 33 | 	router := gin.Default()
 34 | 
 35 | 	// sender to channel of track
 36 | 	peerConnectionMap := make(map[string]chan *webrtc.Track)
 37 | 
 38 | 	m := webrtc.MediaEngine{}
 39 | 
 40 | 	// Setup the codecs you want to use.
 41 | 	// Only support VP8(video compression), this makes our proxying code simpler
 42 | 	m.RegisterCodec(webrtc.NewRTPVP8Codec(webrtc.DefaultPayloadTypeVP8, 90000))
 43 | 
 44 | 	api := webrtc.NewAPI(webrtc.WithMediaEngine(m))
 45 | 
 46 | 	peerConnectionConfig := webrtc.Configuration{
 47 | 		ICEServers: []webrtc.ICEServer{
 48 | 			{
 49 | 				URLs: []string{"stun:stun.l.google.com:19302"},
 50 | 			},
 51 | 		},
 52 | 	}
 53 | 
 54 | 	router.POST("/webrtc/sdp/m/:meetingId/c/:userID/p/:peerId/s/:isSender", func(c *gin.Context) {
 55 | 		isSender, _ := strconv.ParseBool(c.Param("isSender"))
 56 | 		userID := c.Param("userID")
 57 | 		peerID := c.Param("peerId")
 58 | 
 59 | 		var session Sdp
 60 | 		if err := c.ShouldBindJSON(&session); err != nil {
 61 | 			c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
 62 | 			return
 63 | 		}
 64 | 
 65 | 		offer := webrtc.SessionDescription{}
 66 | 		Decode(session.Sdp, &offer)
 67 | 
 68 | 		// Create a new RTCPeerConnection
 69 | 		// this is the gist of webrtc, generates and process SDP
 70 | 		peerConnection, err := api.NewPeerConnection(peerConnectionConfig)
 71 | 		if err != nil {
 72 | 			log.Fatal(err)
 73 | 		}
 74 | 		if !isSender {
 75 | 			recieveTrack(peerConnection, peerConnectionMap, peerID)
 76 | 		} else {
 77 | 			createTrack(peerConnection, peerConnectionMap, userID)
 78 | 		}
 79 | 		// Set the SessionDescription of remote peer
 80 | 		peerConnection.SetRemoteDescription(offer)
 81 | 
 82 | 		// Create answer
 83 | 		answer, err := peerConnection.CreateAnswer(nil)
 84 | 		if err != nil {
 85 | 			log.Fatal(err)
 86 | 		}
 87 | 
 88 | 		// Sets the LocalDescription, and starts our UDP listeners
 89 | 		err = peerConnection.SetLocalDescription(answer)
 90 | 		if err != nil {
 91 | 			log.Fatal(err)
 92 | 		}
 93 | 		c.JSON(http.StatusOK, Sdp{Sdp: Encode(answer)})
 94 | 	})
 95 | 
 96 | 	router.Run(":8080")
 97 | }
 98 | 
 99 | // user is the caller of the method
100 | // if user connects before peer: create channel and keep listening till track is added
101 | // if peer connects before user: channel would have been created by peer and track can be added by getting the channel from cache
102 | func recieveTrack(peerConnection *webrtc.PeerConnection,
103 | 	peerConnectionMap map[string]chan *webrtc.Track,
104 | 	peerID string) {
105 | 	if _, ok := peerConnectionMap[peerID]; !ok {
106 | 		peerConnectionMap[peerID] = make(chan *webrtc.Track, 1)
107 | 	}
108 | 	localTrack := <-peerConnectionMap[peerID]
109 | 	peerConnection.AddTrack(localTrack)
110 | }
111 | 
112 | // user is the caller of the method
113 | // if user connects before peer: since user is first, user will create the channel and track and will pass the track to the channel
114 | // if peer connects before user: since peer came already, he created the channel and is listning and waiting for me to create and pass track
115 | func createTrack(peerConnection *webrtc.PeerConnection,
116 | 	peerConnectionMap map[string]chan *webrtc.Track,
117 | 	currentUserID string) {
118 | 
119 | 	if _, err := peerConnection.AddTransceiver(webrtc.RTPCodecTypeVideo); err != nil {
120 | 		log.Fatal(err)
121 | 	}
122 | 
123 | 	// Set a handler for when a new remote track starts, this just distributes all our packets
124 | 	// to connected peers
125 | 	peerConnection.OnTrack(func(remoteTrack *webrtc.Track, receiver *webrtc.RTPReceiver) {
126 | 		// Send a PLI on an interval so that the publisher is pushing a keyframe every rtcpPLIInterval
127 | 		// This can be less wasteful by processing incoming RTCP events, then we would emit a NACK/PLI when a viewer requests it
128 | 		go func() {
129 | 			ticker := time.NewTicker(rtcpPLIInterval)
130 | 			for range ticker.C {
131 | 				if rtcpSendErr := peerConnection.WriteRTCP([]rtcp.Packet{&rtcp.PictureLossIndication{MediaSSRC: remoteTrack.SSRC()}}); rtcpSendErr != nil {
132 | 					fmt.Println(rtcpSendErr)
133 | 				}
134 | 			}
135 | 		}()
136 | 
137 | 		// Create a local track, all our SFU clients will be fed via this track
138 | 		// main track of the broadcaster
139 | 		localTrack, newTrackErr := peerConnection.NewTrack(remoteTrack.PayloadType(), remoteTrack.SSRC(), "video", "pion")
140 | 		if newTrackErr != nil {
141 | 			log.Fatal(newTrackErr)
142 | 		}
143 | 
144 | 		// the channel that will have the local track that is used by the sender
145 | 		// the localTrack needs to be fed to the reciever
146 | 		localTrackChan := make(chan *webrtc.Track, 1)
147 | 		localTrackChan <- localTrack
148 | 		if existingChan, ok := peerConnectionMap[currentUserID]; ok {
149 | 			// feed the exsiting track from user with this track
150 | 			existingChan <- localTrack
151 | 		} else {
152 | 			peerConnectionMap[currentUserID] = localTrackChan
153 | 		}
154 | 
155 | 		rtpBuf := make([]byte, 1400)
156 | 		for { // for publisher only
157 | 			i, readErr := remoteTrack.Read(rtpBuf)
158 | 			if readErr != nil {
159 | 				log.Fatal(readErr)
160 | 			}
161 | 
162 | 			// ErrClosedPipe means we don't have any subscribers, this is ok if no peers have connected yet
163 | 			if _, err := localTrack.Write(rtpBuf[:i]); err != nil && err != io.ErrClosedPipe {
164 | 				log.Fatal(err)
165 | 			}
166 | 		}
167 | 	})
168 | 
169 | }
170 | 


--------------------------------------------------------------------------------