private void Visualizer_Draw(AudioVisualizer.IVisualizer sender, AudioVisualizer.VisualizerDrawEventArgs args)
{
var drawingSession = (CanvasDrawingSession)args.DrawingSession;
var spectrum = args.Data != null?args.Data.Spectrum.TransformLinearFrequency(20) : _emptySpectrum;
_previousSpectrum = spectrum.ApplyRiseAndFall(_previousSpectrum, _rmsRiseTime, _rmsFallTime, _frameDuration);
_previousPeakSpectrum = spectrum.ApplyRiseAndFall(_previousPeakSpectrum, _peakRiseTime, _peakFallTime, _frameDuration);
// This is temp hack. once visualizer passes in dimensions won't be necessary
float w = 0f, h = 0f;
lock (_sizeLock)
{
w = _visualizerWidth;
h = _visualizerHeight;
}
// There are bugs in ConverToLogAmplitude. It is returning 0 if max is not 0 and min negative.
// The heightScale is a workaround for this
var s = _previousSpectrum.ConvertToLogAmplitude(-50, 0);
var p = _previousPeakSpectrum.ConvertToLogAmplitude(-50, 0);
DrawSpectrumSpline(p[0], drawingSession, Vector2.Zero, w, h, -0.02f, Color.FromArgb(0xff, 0x38, 0x38, 0x38));
DrawSpectrumSpline(p[1], drawingSession, Vector2.Zero, w, h, -0.02f, Color.FromArgb(0xff, 0x38, 0x38, 0x38), true);
DrawSpectrumSpline(s[0], drawingSession, Vector2.Zero, w, h, -0.02f, Color.FromArgb(0xff, 0x30, 0x30, 0x30));
DrawSpectrumSpline(s[1], drawingSession, Vector2.Zero, w, h, -0.02f, Color.FromArgb(0xff, 0x30, 0x30, 0x30), true);
}
