AudioData class

Class to manage audio samples.

The visualization must be enabled to be able to acquire data from the player. You can achieve this by calling SoLoud.instance.setVisualizationEnabled(true);.

Audio samples can be get from the player in three ways. See GetSamplesKind for more information.

IMPORTANT: remember to call dispose method when there is no more need to acquire audio.

After calling updateSamples it's possible to call AudioData.getAudioData to have back the audio samples. For example, using a "Ticker" in a Widget that needs the audio data to be displayed:

...
late final Ticker ticker;
late final AudioData audioData;
late final double waveData;
late final double fftData;

@override
void initState() {
  super.initState();
  audioData = AudioData(GetSamplesKind.linear);
  ticker = createTicker(_tick);
  ticker.start();
}

@override
void dispose() {
  ticker.stop();
  audioData.dispose();
  super.dispose();
}

void _tick(Duration elapsed) {
  if (context.mounted) {
    try {
      audioData.updateSamples();
      setState(() {});
    } on Exception catch (e) {
      debugPrint('$e');
    }
  }
}

Then in your "build" method, you can read the audio data:

try {
  /// Since we are used [GetSamplesKind.linear], `samples` will contain
  /// 512 floats: the first 256 are FFT values, the other 256 are wave values
  final samples = audioData.getAudioData();
  Float32List ffiData = samples.sublist(0, 256);
  Float32List waveData = samples.sublist(256, 512);
  /// Do something with `ffiData` and `waveData`
} on Exception catch (e) {
  debugPrint('$e');
}

To smooth FFT values use SoLoud.setFftSmoothing.

Constructors

Properties

Methods

Operators

flutter_soloud library