libdengjen

C API bindings for the dengjen-tts speech synthesis engine.

Exposes extern "C" functions such as libdengjenLoadVoiceFromConfigPath, libdengjenSpeak, and libdengjenSpeakToFile, delivering audio and completion events to a caller-supplied SpeechSynthesisCallback via a SynthesisEvent struct; the C header is generated from this crate with cbindgen.

ABI stability

• libdengjenAbiVersion() returns the ABI version, equal to DENGJEN_ABI_VERSION in the header. The Go init and the Java DengjenLib static initializer compare it with the version they were built for before any other call; an incompatible change to an exported function or struct bumps it.
• libdengjenSpeak and libdengjenSpeakToFile take const SynthesisParams *. Set struct_size to sizeof(SynthesisParams) as you compiled it. Later versions only append fields and read them when struct_size covers them, so a caller built against an older header keeps working.
• A struct_size smaller than the first layout is reported as INVALID_CONFIGURATION in out_error.