flutter_gemma_speech 0.1.0

On-device speech (STT now; TTS/voice later) for flutter_gemma via the LiteRT C API + dart:ffi. Opt-in SttBackendProvider.

flutter_gemma_speech

On-device speech for flutter_gemma — STT now, TTS and a voice loop later — via the LiteRT C API + dart:ffi. Opt-in package: add it only if your app needs speech-to-text (or, later, text-to-speech).

This package depends on flutter_gemma_litertlm, which owns the shared libLiteRtLm native bundle and exposes the LiteRt interpreter FFI (LiteRtBindings) used here.

Status

STT works end-to-end for moonshine-tiny (raw-PCM seq2seq). LiteRtSttBackend implements SttBackendProvider (canHandle always true — the model is selected via SttModelSpec.sttModelType, not the backend) and drives a generic SttModelProfile-based pipeline; whisper/parakeet (log-mel) profiles and TTS/voice are follow-ons.

Usage

import 'package:flutter_gemma/flutter_gemma.dart';
import 'package:flutter_gemma_speech/flutter_gemma_speech.dart';

await FlutterGemma.initialize(
  sttBackends: [LiteRtSttBackend()],
);

Platforms

Platform	Support
Android / iOS	✅ FFI
macOS / Linux / Windows	✅ FFI
Web	🚧 follow-on (stub throws UnsupportedError for now)

No hook/build.dart of its own — the native library is bundled by flutter_gemma_litertlm's Native Assets hook and shared transitively.