public Led[] DoFrame() // TODO: Latency issues...
{
leds.FadeToBlackAllLeds(0.3f); // 0.3f * delta que es 20 ms se supone
if (!newAudioAvailable)
{
return(this.leds);
}
newAudioAvailable = false;
var y_in = FFTUtil.ProcessAudio(audio);
if (y_in.Length < this.lastIndex)
{
return(this.leds);
}
var y = new double[this.lastIndex];
Array.Copy(y_in, 0, y, 0, this.lastIndex);
y = y.Select(x => x < 0 ? 0 : x).ToArray();
double[] y_scaled = new double[this.lastIndex];
for (int i = 0; i < this.lastIndex; i++)
{
var freq = FFTUtil.GetFreqForIndex(i, FFT_SPACING_HZ);
var val = y[i];
var limit = freq <= BASS_MAX_FREQ ? BASS_TOP_LIMIT : MID_TOP_LIMIT;
double scaled = Utils.Scale(val, 0, limit, 0, 1);
y_scaled[i] = scaled;
}
HSVColor[] yColors = new HSVColor[this.lastIndex];
for (int i = 0; i < this.lastIndex; i++)
{
yColors[i] = UtilsLED.ValueToHSV(this.ledCount / 2, this.freqArray[i], y_scaled[i]);
}
for (int i = 0; i < this.lastIndex; i++)
{
if (this.freqArray[i] == this.ledCount / 2)
{
break;
}
leds.AddSymmetricColorAroundLeds(this.freqArray[i], yColors[i]);
}
return(this.leds);
}
public void Initialize(int ledCount)
{
audio = new AudioEngine();
audio.Start();
audio.NewData += OnNewAudioData;
this.ledCount = ledCount;
FFT_SPACING_HZ = FFT_MAXFREQ / ledCount;
this.lastIndex = (int)(2500 / FFT_SPACING_HZ);
this.freqArray = new int[this.lastIndex];
for (int i = 0; i < freqArray.Length; i++)
{
this.freqArray[i] = (int)Math.Floor(Utils.Scale(FFTUtil.GetFreqForIndex(i, FFT_SPACING_HZ), 0, 2500, 0, this.ledCount / 2 + 1));
}
leds = new Led[ledCount];
for (int i = 0; i < ledCount; i++)
{
leds[i] = new Led();
}
}
