public static byte[] SendFrequencyBandData(AudioData audioData)
{
int[] lightCounts = audioData.LightFrequencyCounts;
byte[] dataToSend = new byte[48];
double[] lightDoubles = new double[lightCounts.Length];
// Get all counts on a scale from 0 to 1 based on their proportion to the entire time slice
for (int logPosition = 0; logPosition < lightCounts.Length; logPosition++)
{
if (lightCounts[logPosition] != 0)
{
lightDoubles[logPosition] = Math.Log10(lightCounts[logPosition]) / (Math.Log(lightCounts[logPosition]) + 1);
}
}
// Gets the max frequency count and updates the running max if necessary
double maxFrequencyCount = lightDoubles.Max();
if (maxFrequencyCount > currentMaxCount)
{
currentMaxCount = maxFrequencyCount;
}
// Gets the minumum non-zero frequency and updates the running min if necessary
double minFrequencyCount = lightDoubles.Where(lightNum => lightNum != 0).Min();
if (minFrequencyCount < currentMinCount)
{
currentMinCount = minFrequencyCount;
}
for (int lightPosition = 0; lightPosition < lightCounts.Length; lightPosition++)
{
double hueColour;
int[] rgbColour = { 0, 0, 0 };
if (lightDoubles[lightPosition] != 0)
{
hueColour = (lightDoubles[lightPosition] - currentMinCount) / (currentMaxCount - currentMinCount);
}
else
{
hueColour = 0;
}
// Avoid lights having a hue colour of 0, as this produces white lights which make it harder to pick out differences from moment to moment.
if (hueColour != 0)
{
// Bumps up the lightness by 0.25 because of the large number of low amplitudes making a lot of colours too dark to display
double lightness = (audioData.AverageAmplitudes[lightPosition] * 0.75) + 0.25;
rgbColour = ColorSpaceConverter.HSLToRGB(hueColour, 1, lightness);
}
dataToSend[(lightPosition + 1) * 3 - 3] = Convert.ToByte(rgbColour[0]);
dataToSend[(lightPosition + 1) * 3 - 2] = Convert.ToByte(rgbColour[1]);
dataToSend[(lightPosition + 1) * 3 - 1] = Convert.ToByte(rgbColour[2]);
}
port.Write(dataToSend, 0, dataToSend.Length);
return(dataToSend);
}
