Open WebRTC Toolkit Native SDK

Introduction

The Open WebRTC Toolkit(OWT) client SDK for native Windows/Linux/Android/iOS applications is built upon the W3C WebRTC standard to accelerate the development of real time communication applications on these platforms. It supports peer to peer communication, and conference mode communication working with Open WebRTC Toolkit conference server.

Supported Windows platform: Windows 10 and above.
Supported Linux platform: Ubuntu 20.04 and above.
Supported iOS platform: iOS 12.0 and above.

Documentation

To generate the API document, go to the scripts directory, and run python build-win.py --docs for Windows or ./gendoc.sh in talk/owt/docs/ios for iOS.

You need Doxygen in your path.

How to build

Prepare the development environment

Before you start, make sure you have the following prerequisites installed/configured:

WebRTC stack build dependencies, except the Visual Studio part.
Proxy settings.

The following dependencies are for Windows only:

Visual Studio. Only Visual Studio 2022 version 17.4.4 is tested.
Intel Media SDK for Windows, version 2021 R1 or higher.

Get the code

Make sure you clone the source code to a directory named src.
Create a file named .gclient in the directory above the src dir, with these contents:

solutions = [
  {
     "managed": False,
     "name": "src",
     "url": "https://github.com/open-webrtc-toolkit/owt-client-native.git",
     "custom_deps": {},
     "deps_file": "DEPS",
     "safesync_url": "",
  },
]
target_os = []

Build

Windows

Set DEPOT_TOOLS_WIN_TOOLCHAIN to 0 in your system environment.
Set Visual Studio related environmental variables. You can either call VsDevCmd.bat under Common7\Tools directory of your Visual Studio installation, or start build in Developer Command Prompt for VS.
In src directory, Run gclient sync. It may take long time to download large amount of data the first time you run it. Also you are required to run this whenever DEPS file is updated.
Go to the src/scripts directory, and run: python build-win.py --gn_gen --sdk --tests --ssl_root /path/to/ssl --msdk_root /path/to/msdk --output_path /path/to/output.

The optional msdk_root should be set to the directory of your Intel MediaSDK for Windows, version 2020 R1 or higher. This is typically C:\Program Files (x86)\IntelSWTools\Intel(R) Media SDK 2020 R1\Software Development Kit. If specified, will enable hardware accelerated video codecs for most of the video codecs.

Linux

In src direcotry, run gclient sync. It may take long time to download large amount of data.
Go to the src/scripts directory, and run: python build_linux.py --gn_gen --sdk --tests --shared --output_path /path/to/out.

If --msdk_root is specified to correct Intel MediaSDK path, for example, '/opt/intel/mediasdk', hardware decoders will be built besides the software implementations.
If the optional --fake_audio is specified, the internal audio devices implementation based on alsa or pulseaudio will not be built and a dummy implementation will be used.
If you would like to build shared library instead of default static library, add --shared option when invoking build_linux.py. Shared library is recommend because it avoids symbol conflicts.
The document for sdk will also be copied to this directory if you specify --docs option in above command.

Common build options shared by Windows and Linux:

By default x86|Debug library will be created. Specify --arch x64 if you want to build x64 libraries; Specify --scheme release if release version of library is to be built.
The built binary will be under path specified by --output_path. If --output_path is not set, the built binary will be under src/out directory.
The argument --sio_root should be set to the root directory of Socket.IO cpp 3.x SDK, with headers in include sub-folder, libsioclient_tls.a in lib sub-folder.
The optional --ssl_root should be set to the root directory of lastest OpenSSL 3.0 series directory. If specified, build tool will search external OpenSSL headers in ssl_root/include and OpenSSL binaries in ssl_root/lib. But binaries are not included in OWT SDK, so applications still need to link libcrypto and libssl.
The optional --ffmpeg_root should be set to the root directory of FFmpeg, with headers in include sub-folder, and libs in lib sub-folder. Binary libraries are not necessary for building OWT SDK, but it's needed by your application or tests when this argument is specified. If this argument is not specified, FFmpeg will not be used. If neither --ffmpeg_root nor --msdk_root is specified, and external decoder doesn't support H.264, GN arg rtc_use_h264 should be set to false, otherwise, a runtime error will occur.
Use --gn_gen to generate args.gn during the first build or when you change either ssl_root/msdk_root options.
The optional --tests will trigger unit tests after build.
Run build*.py with --help for argument description.

iOS

Update to latest macOS and Xcode. iOS SDK can only be built on macOS.

Replace the last line of .gclient with target_os=["ios"]
Run gclient sync. It may take a long time to download a large amount of data.
Run scripts\build.py.

Android

This branch doesn't support Android build. owt-client-android depends on 5.0.x branch of this repository.

How to contribute

We warmly welcome community contributions to the owt-client-native repository. If you are willing to contribute your features and ideas to OWT, follow the process below:

Make sure your patch will not break anything, including all the build and tests.
Submit a pull request to Pull Requests.
Watch your patch for review comments, if any, until it is accepted and merged.

The OWT project is licensed under Apache License, Version 2.0. By contributing to the project, you agree to the license and copyright terms therein and release your contributions under these terms.

How to report issues

Use the "Issues" tab on Github.

open-webrtc-toolkit/owt-client-native