Demo instructions

1. Clone/Download this project and open in Godot.

2. Go to assetlib and search for twovoip, and install it.

3. Run the app try making and playing recordings (don't forget to hold down PTT) or MQTT-connecting at the same time as someone else.

4. If the microphone is working, then you should see a waveform on the app like this:

If there's no response on MacOS, it could be this issue Go to Project Settings (with Advanced Settings selected) -> Audio -> Driver -> Mix rate and set to 48000

Opus compression audio for Godot

This is a low level operation of the opus library based on https://github.com/RevoluPowered/one-voip-godot-4/ with a VoIP-over-MQTT demo project.

It can also integrate with OVRLipSync if you download it and are not on Linux.

Build instructions:

Only do this locally if you are developing the C++ code.

Nixos automated

The build system is defined by the flake.nix file

• makes a result directory that needs to be copied into addons

nix build
cp result/addons/twovoip/*so addons/twovoip

• android version:

nix build .#android
cp result/addons/twovoip/*so addons/twovoip

Otherwise by hand when developing

Since we've not got submodules here we need to first clone Opus and godot-cpp modules before building them

git clone --recurse-submodules [email protected]:goatchurchprime/two-voip-godot-4.git
cd two-voip-godot-4

On Linux:

cd godot-cpp
cmake -Bbuild -DCMAKE_POSITION_INDEPENDENT_CODE=ON
cd build
make
cd ../..
scons

**You may need to copy the much simplified SConstruct_jgtdev onto SConstruct to make it work.
Also, the project has been moved down into the example directory, so it's a good idea to go into the example/addons directory and set up the following symlink:

ln -s ../../addons/twovoip twovoip

On Windows:

Use Visual Studio 2022 Community Edition with CMake option to open opus directory and convert cmake script to sln and then compile.

cd ../..
python -m SCons

On Mac:

See the instructions on the one-voip here: https://github.com/RevoluPowered/one-voip-godot-4/?tab=readme-ov-file#mac

Using scons

Build a library for the current platform:

scons apply_patches # optional
scons build_opus # build opus using cmake
scons # build this library

Build a library for another platform:

scons apply_patches # optional
# The scons arguments for build_opus and the build of the library itself must match!
scons platform=web target=template_release build_opus # build opus using cmake
scons platform=web target=template_release # build this library

To build with lipsync support, you need to add the lipsync=yes flag and download the libraries from the section below.

With OVRLipSync

This is a highly speculative component that takes advantage of the chunking feature in the OpusChunked effect, but which is currently closed source. There is no Linux version. See godotengine/godot-proposals#9718

Download the OVRLipSync libraries from https://developer.oculus.com/documentation/native/audio-ovrlipsync-native/ and unzip into top level as OVRLipSyncNative directory in this project. There is a stub include file for Linux that allows this GDExtension to compile and work without this library.

On Windows you may need to copy the OVRLipSyncNative/Lib/Win64/OVRLipSync.dll file to the same directory as your GodotEngine.exe so that it finds and links it.

For the addon to work correctly, twovoip_lipsync and twovoip cannot be used in the same project.