dlutton
setProgressHandler callback is not working with finnish language
I use the call back _flutterTts.setProgressHandler((String text, int startOffset, int endOffset, String word) to be notified of each word that is being spoken by the TTS. It works alright for android in all the 20 languages I have on my app (Speak Out Kids on Google Play). On iOS it also works with all languages, except Finnish. On Finnish instead of starting on 0 it starts on 15, which sort of breaks the functionality.
I created a reproduceable test on dart (full code further below), you just need to drop it inside a project that has the flutter_tts dependency. The result, check the indexes
Reproduction steps
import 'dart:io';
import 'package:flutter/material.dart';
import 'package:flutter_tts/flutter_tts.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter TTS Demo',
home: TtsDemoPage(),
);
}
}
class TtsDemoPage extends StatefulWidget {
@override
_TtsDemoPageState createState() => _TtsDemoPageState();
}
class _TtsDemoPageState extends State<TtsDemoPage> {
final FlutterTts _flutterTts = FlutterTts();
String _callbackOutput = "";
String _language = "";
@override
void initState() {
super.initState();
// Configura o progress handler para capturar os offsets e a palavra atual
_flutterTts.setProgressHandler((String text, int startOffset, int endOffset, String word) {
String output = "tts text - startOffset: $startOffset - endOffset: $endOffset - Word: $word\n";
debugPrint(output);
setState(() {
_callbackOutput += output;
});
});
}
Future<void> _speakEnglish() async {
_language = "en-US";
String textToSPeak = "Hello, this is an English test.";
await _flutterTts.setLanguage("en-US");
setState(() {
_callbackOutput = _callbackOutput + "\n\n========== Speaking in English ==========\n";
_callbackOutput = _callbackOutput + "\n$textToSPeak\n";
});
await _flutterTts.speak(textToSPeak);
}
Future<void> _speakFinnish() async {
_language = "fi-FI";
String textToSPeak = "Hei, tämä on suomen testaa.";
await _flutterTts.setLanguage("fi-FI");
setState(() {
_callbackOutput = _callbackOutput + "\n\n========== Speaking in Finnish ==========\n";
_callbackOutput = _callbackOutput + "\n$textToSPeak\n";
});
await _flutterTts.speak(textToSPeak);
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text("Flutter TTS Demo"),
),
body: Padding(
padding: const EdgeInsets.all(16.0),
child: Column(
children: [
ElevatedButton(
onPressed: _speakEnglish,
child: Text("Speak in English"),
),
SizedBox(height: 10),
ElevatedButton(
onPressed: _speakFinnish,
child: Text("Speak in Finnish"),
),
SizedBox(height: 20),
Expanded(
child: SingleChildScrollView(
child: Text(
_callbackOutput,
style: TextStyle(fontFamily: 'monospace'),
),
),
)
],
),
),
);
}
}
Configuration
Finish language: fi-FI
Version: 4.2.2
Platform:
- [x] :iphone: iOS
I tried to add this:
if (appSettingsProvider.language.startsWith('fi') && isIOS) {
startOffset=startOffset-15;
endOffset=endOffset-15;
}
But still, it didn't helped much, as depending on the text it varies the point where it start the initial index, sometimes 15, sometimes 16.