I have not had time to contribute to this recently, see two voip godot 4 for a more actively maintained VOIP extension with a LOT more progress :>
Add voice chat to your game in minutes!
Features:
- Uses native godot bus effects and audio streams ✅
- Opus compression ✅
- Jitter buffer 🚧
- Echo cancelling 🚧
Builds for:
Install webrtc-native by downloading the latest release and dragging the webrtc-native folder into your godot project's root folder
Install one-voip by downloading the latest release and dragging the one-voip folder into your godot project's root folder
Spawn in a new bus in your project's audio mixer for your microphone, mute the bus (unless you want to listen to yourself), and add an VOIPInputCapture.
Add an AudioStreamPlayer somewhere in the scene, add a new AudioStreamMicrophone as the stream, set the Bus to the one you made (e.g. in the demo it's called "Mic") and turn on autoplay.
To send audio, connect a function to the packet_ready signal on the effect:
var idx = AudioServer.get_bus_index("Mic")
var effect = AudioServer.get_bus_effect(idx, 0)
effect.packet_ready.connect(_on_packet_ready)
And send the packet using any method you like in the _on_packet_ready function.
To receive audio, instantiate an AudioStreamVOIP every time a peer connects, add it to some kind of audio stream player, and MAKE SURE you play it. When you receive a packet, figure out what user sent it, and then push it to their AudioStreamVOIP:
stream.push_packet(packet)
Check out the demos for a full example.
If you use the demo ensure that AudioStreamPlayer uses unique AudioStreamVOIP making it local to scene.
Install CMake and Visual Studio build tools (MinGW will also work by modifying the opus path in SConstruct, instructions are for MSBuild)
In thirdparty/opus: cmake -Bbuild
In thirdparty/opus/build: msbuild Opus.sln /p:Configuration=Release
In the project root: scons
This will build to demo_rtc/bin
In thirdparty/opus: cmake -Bbuild -DCMAKE_POSITION_INDEPENDENT_CODE=ON
In thirdparty/opus/build: make
In the project root: scons
Not sure on the status of whether unsigned GDExtensions can be loaded into MacOS, but it builds, so here are the instructions anyways
!! You may need to set driver/mix_rate=48000 in the [audio] section of project.godot
In thirdparty/opus: cmake -Bbuild
In thirdparty/opus/build: make
In the project root: scons platform=macos arch=x86_64 or scons platform=macos arch=arm64
Install emscripten (chocolatey can help with dependencies: choco install emscripten)
In thirdparty/opus: emcmake cmake -Bbuild
In thirdparty/opus/build: make
In the project root: scons platform=javascript