generate method
Generate speech audio from optsJson (serialized SpeechCallOptions).
Returns the JSON-serialized SpeechResult, or throws on error.
Implementation
String generate(String optsJson) {
_checkOpen();
return _withUtf8(optsJson, (optsPtr) {
final resultPtr = _ffi.speechGenerate(_handle, optsPtr);
return _readResult(_ffi, resultPtr);
});
}