private void paintControl1_Paint(object sender, PaintEventArgs e)
{
Graphics g = e.Graphics;
g.Clear(Color.Black);
int frameLength = 64;
QAM modulator = new QAM((int)Math.Pow(2.0f, (float)numericUpDown1.Value), (int)Math.Pow(2.0f, (float)numericUpDown2.Value), (int)numericUpDown4.Value, frameLength);
/*
for (var i = 0; i < modulator.NumSymbols; i++)
{
float[] symbol = modulator.Modulate(i, 64);
DrawGraph(g, 100.0f, 100 + i * 74.0f, symbol, 1.0f, 32.0f);
}
*/
string inString = "Hello World!";
byte[] inBytes = Encoding.ASCII.GetBytes(inString);
UInt64[] inSymbols = modulator.EncodeSymbols(inBytes);
List<float> stream = new List<float>();
foreach (UInt64 symbol in inSymbols)
{
float[] fragment = modulator.Modulate(symbol);
stream.AddRange(fragment);
}
float noiseScale = (float)numericUpDown3.Value / 20.0f;
float[] noise = Noise.GenerateNoise(stream.Count, (float)numericUpDown3.Value / 20.0f);
List<float> noisyStream = new List<float>();
int shifter = (int)(Math.Round((m_Random.NextDouble() * 2.0f - 1.0f) * (float)numericUpDown5.Value));
for (int i = 0; i < stream.Count; i++)
{
noisyStream.Add(noise[i] + stream[Math.Max(0, Math.Min(stream.Count - 1, i + shifter))]);
}
List<UInt64> outSymbols = new List<UInt64>();
for (int i = 0; i < noisyStream.Count; i += frameLength)
{
float[] fragment = noisyStream.GetRange(i, frameLength).ToArray();
UInt64 symbolOut = modulator.Demodulate(fragment);
outSymbols.Add(symbolOut);
}
//byte[] outBytes = modulator.DecodeSymbols(inSymbols);
byte[] outBytes = modulator.DecodeSymbols(outSymbols.ToArray());
string outString = Encoding.ASCII.GetString(outBytes);
float curY = 100.0f;
float streamScale = 840.0f / stream.Count;
float streamSize = frameLength * streamScale;
float symbolsPerByte = (float)inSymbols.Length / (float)inBytes.Length;
for (int i = 0; i < inString.Length; i++)
{
float symbol = (float)i * symbolsPerByte;
g.DrawString(inString[i].ToString(), System.Drawing.SystemFonts.DefaultFont, Brushes.White, new PointF(20.0f + symbol * streamSize, curY));
}
curY += 16.0f;
for (int i = 0; i < inSymbols.Length; i++)
{
g.DrawString(inSymbols[i].ToString(), System.Drawing.SystemFonts.DefaultFont, Brushes.White, new PointF(20.0f + (float)i * streamSize, curY));
}
int graphMax = 0;
curY += 26.0f;
DrawGraph(g, 20, curY, stream.ToArray(), streamScale, 32.0f, Pens.Aqua, Pens.SteelBlue, frameLength, out graphMax);
curY += graphMax + 10.0f;
DrawGraph(g, 20, curY, noise, streamScale, 32.0f, Pens.Red, Pens.Red, 1, out graphMax);
curY += 32.0f * noiseScale * 1.5f + 10.0f;
DrawGraph(g, 20, curY, noisyStream.ToArray(), streamScale, 32.0f, Pens.Yellow, Pens.LightYellow, frameLength, out graphMax);
curY += graphMax + 10.0f;
for (int i = 0; i < outSymbols.Count; i++)
{
Brush useBrush = outSymbols[i] != inSymbols[i] ? Brushes.Red : new SolidBrush(Color.FromArgb(0, 255, 0));
g.DrawString(outSymbols[i].ToString(), System.Drawing.SystemFonts.DefaultFont, useBrush, new PointF(20.0f + (float)i * streamSize, curY));
}
curY += 16.0f;
for (int i = 0; i < inString.Length; i++)
{
float symbol = (float)i * symbolsPerByte;
Brush useBrush = outString[i] != inString[i] ? Brushes.Red : new SolidBrush(Color.FromArgb(0, 255, 0));
g.DrawString(outString[i].ToString(), System.Drawing.SystemFonts.DefaultFont, useBrush, new PointF(20.0f + symbol * streamSize, curY));
}
curY += 16.0f;
g.DrawString("amps", System.Drawing.SystemFonts.DefaultFont, Brushes.Yellow, new PointF(5, 25));
g.DrawString("phases", System.Drawing.SystemFonts.DefaultFont, Brushes.Yellow, new PointF(65, 25));
g.DrawString("freqs", System.Drawing.SystemFonts.DefaultFont, Brushes.Yellow, new PointF(125, 25));
g.DrawString("noise", System.Drawing.SystemFonts.DefaultFont, Brushes.Yellow, new PointF(205, 25));
g.DrawString(String.Format("QAM-{0} x{1}, {2} symbols, {3} message len", modulator.NumSubSymbols, modulator.NumFrequencies, modulator.NumSymbols, inSymbols.Length), System.Drawing.SystemFonts.DefaultFont, Brushes.Yellow, new PointF(310, 25));
}
