public void Synth(string filename)
{
var landmarks = Finder.EnumerateAllLandmarks().ToArray();
var stripeCount = 1 + landmarks.Max(l => l.StripeIndex);
var wave = new float[stripeCount * Analysis.CHUNK_SIZE];
foreach (var l in landmarks)
{
var startSample = Analysis.CHUNK_SIZE * (l.StripeIndex - 1);
var endSample = startSample + 2 * Analysis.CHUNK_SIZE;
for (var t = startSample; t < endSample; t++)
{
wave[t] += MathF.Sin(2 * MathF.PI * Analysis.BinToFreq(l.InterpolatedBin) * t / Analysis.SAMPLE_RATE)
* MathF.Exp(l.InterpolatedLogMagnitude / UInt16.MaxValue)
* Envelope[t - startSample];
}
}
var maxSample = wave.Max(s => Math.Abs(s));
var bytes = new List <byte>(2 * wave.Length);
foreach (var s in wave)
{
bytes.AddRange(BitConverter.GetBytes(Convert.ToInt16(Int16.MaxValue * s / maxSample)));
}
File.WriteAllBytes(filename, bytes.ToArray());
}
public void Paint(string filename)
{
var w = Analysis.StripeCount;
var h = Analysis.BIN_COUNT;
var gamma = 0.25f;
var maxMagnitudeSquared = Analysis.FindMaxMagnitudeSquared();
using (var bitmap = new Bitmap(w, h)) {
for (var x = 0; x < w; x++)
{
for (var y = 0; y < h; y++)
{
var magnitudeSquared = Analysis.GetMagnitudeSquared(x, y);
var shade = Convert.ToByte(255 * MathF.Pow(magnitudeSquared / maxMagnitudeSquared, gamma / 2));
bitmap.SetPixel(x, h - y - 1, Color.FromArgb(shade, shade, shade));
}
}
using (var g = Graphics.FromImage(bitmap)) {
g.SmoothingMode = SmoothingMode.AntiAlias;
foreach (var l in Finder.EnumerateAllLandmarks())
{
var radius = 8 * l.InterpolatedLogMagnitude / UInt16.MaxValue;
var cx = l.StripeIndex;
var cy = h - l.InterpolatedBin - 1;
g.FillEllipse(Brushes.Yellow, cx - radius, cy - radius, 2 * radius, 2 * radius);
}
}
bitmap.Save(filename);
}
}