This project includes the resources needed for building a Spiel speech provider.
This is a loose specification of what methods and properties a D-Bus speech provider should implement in order to be discoverable and usable by client applications. It consists of simple speech methods such as Synthesize(), and a Voices property.
The interface for a typical speech provider implementation could be written in a couple hundred lines of code. The specification is designed to be simple and straightforward. The really neat thing about this kind of speech provider is that it can be distributed as a Flatpak or Snap without any system prerequisites and be completely self contained.
The speech provider library is designed to provide some utility for creating speech providers. Specifically it offers a stream writer that can be used to send audio data interleaved with speech progress events (word, sentance, ssml mark, etc.)
Language bindings are available through GObject Introspection. So this should work for any application, be it in C/C++, Python, Rust, ECMAscript, or Lua.
We use the Meson build system for building this project.
# Some common options
meson setup build
meson compile -C buildThere is auto-generated API reference along with a documented D-Bus interface for speech providers.