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Description:

vosk flutter

Vosk Flutter Plugin #

Flutter plugin for Vosk speech recognition.
Platform Support #

Android
iOS
MacOS
Web
Linux
Windows

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Usage #
Configurations #
Follow the instruction at the Installing page of the package.
Android
Add this pro guard rules in android/app/proguard-rules.pro(if the file does not exist - create it):
-keep class com.sun.jna.* { *; }
-keepclassmembers class * extends com.sun.jna.* { public *; }
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If you want to use a microphone input, add the microphone permission to your AndroidManifest.xml:
<uses-permission android:name="android.permission.RECORD_AUDIO" />
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Load model #
flutter:
assets:
- assets/models/

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final vosk = VoskFlutterPlugin.instance();
final enSmallModelPath = await ModelLoader()
.loadFromAssets('assets/models/vosk-model-small-en-us-0.15.zip');
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Create recognizer #
final recognizer = await vosk.createRecognizer(
model: model,
sampleRate: sampleRate,
);
final recognizerWithGrammar = await vosk.createRecognizer(
model: model,
sampleRate: sampleRate,
grammar: ['one', 'two', 'three'],
);
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Recognize audio data #
Uint8List audioBytes = ...; // audio data in PCM 16-bit mono format
List<String> results = [];
int chunkSize = 8192;
int pos = 0;

while (pos + chunkSize < audioBytes.length) {
final resultReady = await recognizer.acceptWaveformBytes(
Uint8List.fromList(audioBytes.getRange(pos, pos + chunkSize).toList()));
pos += chunkSize;

if (resultReady) {
print(await recognizer.getResult());
} else {
print(await recognizer.getPartialResult());
}
}
await recognizer.acceptWaveformBytes(
Uint8List.fromList(audioBytes.getRange(pos, audioBytes.length).toList()));
print(await recognizer.getFinalResult());
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Recognize microphone data #
Android
final speechService = await vosk.initSpeechService(recognizer);
speechService.onPartial().forEach((partial) => print(partial));
speechService.onResult().forEach((result) => print(result));
await speechService.start();
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Linux & Windows
Use any suitable plugin to get the microphone input and pass it to a recognizer