public WaveformDisplay()
{
UseLines = true;
MaxSamples = 10000;
ZoomFactor = 1.0f;
colorFG = Color.Cyan;
colorBG = Color.Black;
LinePen = new Pen(colorFG);
InitializeComponent();
Image = new Bitmap(Width, Height);
ImageGraph = Graphics.FromImage(Image);
ImageBuffer = new Bitmap(Width, Height);
ImageBufferGraph = Graphics.FromImage(ImageBuffer);
DisplayTimerState = new DisplayFuncState();
DisplayTimer = new Timer();
DisplayTimer.Elapsed += DisplayFunc;
DisplayTimer.Interval = 20;
DisplayTimer.Start();
}
private void DisplayFunc(object state, ElapsedEventArgs e)
{
DisplayFuncState s = DisplayTimerState;
lock (SampleValues)
{
ImageBufferGraph.Clear(colorBG);
if (SampleValues.Count > 0)
{
int startPos = StartSample;
int samples = Width;
if (startPos + samples > SampleValues.Count)
{
startPos = SampleValues.Count - samples;
}
if (startPos < 0)
{
startPos = 0;
samples = SampleValues.Count;
}
int lastX = 0;
int lastY = 0;
for (int pos = 0; pos < samples; pos++)
{
double sampleValue = (double)SampleValues[startPos + pos];
int posX = pos;
int posY = (int)(Height - (sampleValue * ZoomFactor * Height)) / 2;
posY = Math.Min(posY, Height - 1);
posY = Math.Max(posY, 0);
if (UseLines && pos > 0)
{
ImageBufferGraph.DrawLine(LinePen, lastX, lastY, posX, posY);
}
else
{
ImageBuffer.SetPixel(posX, posY, colorFG);
}
lastX = posX;
lastY = posY;
}
if (SampleValues.Count > MaxSamples)
{
int removeCount = SampleValues.Count - MaxSamples;
SampleValues.RemoveRange(0, removeCount);
}
if (ShowFPS)
{
if (s.FrameNumber++ > 500 && s.FrameNumber % 20 == 0)
{
s.FPS = s.FrameNumber / DateTime.Now.Subtract(s.StartTime).TotalSeconds;
}
ImageBufferGraph.DrawString("FPS: " + (int)s.FPS, s.TextFont, Brushes.Cyan, 10, 10);
}
if (!string.IsNullOrEmpty(DisplayName))
{
ImageBufferGraph.DrawString(DisplayName, s.TextFont, Brushes.Cyan, 10, 10);
}
double totalPhaseDiff = totalPhase - lastTotalPhase;
lastTotalPhase = totalPhase;
ImageBufferGraph.DrawString("\u03C6: " + String.Format("{0:0.00}", totalPhase), s.TextFont, Brushes.Cyan, 10, 30);
ImageBufferGraph.DrawString("\u0394\u03C6: " + String.Format("{0:0.00}", totalPhaseDiff), s.TextFont, Brushes.Cyan, 10, 50);
ImageGraph.DrawImageUnscaled(ImageBuffer, 0, 0);
Invalidate();
}
}
}
private void DisplayFunc(object state, ElapsedEventArgs e)
{
DisplayFuncState s = DisplayState;
lock (SampleValues)
{
if (SampleValues.Count > 0)
{
ImageBufferGraph.Clear(colorBG);
double[] samples = (double[])SampleValues[0];
double ratioX = (double)Width / samples.Length;
if (ratioX >= 1.0f)
{
for (int pos = 0; pos < samples.Length; pos++)
{
double sampleValue = sampleToDBScale(samples[pos]);
int posX = (int)(pos * ratioX);
int posY = (int)(Height - sampleValue * Height) / 2;
posX = Math.Min(posX, Width - 1);
posX = Math.Max(posX, 0);
posY = Math.Min(posY, Height - 1);
posY = Math.Max(posY, 0);
LinePoints[pos].X = posX;
LinePoints[pos].Y = posY;
/*
* if (UseLines && pos > 0)
* ImageBufferGraph.DrawLine(LinePen, lastX, lastY, posX, posY);
* else
* ImageBuffer.SetPixel(posX, posY, colorFG);
*
* lastX = posX;
* lastY = posY;*/
}
}
else
{
for (int posX = 0; posX < Width; posX++)
{
int pos = (int)(posX / ratioX);
pos = Math.Min(pos, samples.Length - 1);
pos = Math.Max(pos, 0);
double sampleValue = sampleToDBScale(samples[pos]);
int posY = (int)(Height - sampleValue * Height) / 2;
posY = Math.Min(posY, Height - 1);
posY = Math.Max(posY, 0);
LinePoints[posX].X = posX;
LinePoints[posX].Y = posY;
/*
* if (UseLines && pos > 0)
* ImageBufferGraph.DrawLine(LinePen, lastX, lastY, posX, posY);
* else
* ImageBuffer.SetPixel(posX, posY, colorFG);
*
* lastX = posX;
* lastY = posY;
* */
}
}
ImageBufferGraph.DrawLines(LinePen, LinePoints);
SampleValues.Clear();
if (ShowFPS)
{
if (s.FrameNumber++ > 100 && s.FrameNumber % 20 == 0)
{
s.FPS = s.FrameNumber / DateTime.Now.Subtract(s.StartTime).TotalSeconds;
}
ImageBufferGraph.DrawString("FPS: " + (int)s.FPS, s.TextFont, Brushes.Cyan, 10, 10);
}
ImageGraph.DrawImageUnscaled(ImageBuffer, 0, 0);
Invalidate();
}
}
}
private void DisplayFunc(object state, ElapsedEventArgs e)
{
DisplayFuncState s = DisplayState;
lock (SampleValues)
{
// ImageBufferGraph.Clear(Color.Black);
if (SampleValues.Count > 0)
{
double[] samples = (double[])SampleValues[0];
double ratioX = (double)Width / samples.Length;
int lastX = 0;
int lastY = 0;
if (ratioX >= 1.0f)
{
for (int pos = 0; pos < samples.Length; pos++)
{
int posX = (int)(pos * ratioX);
int posY = WaterfallLine;
double sampleValue = sampleToDBScale(samples[pos]);
sampleValue *= 256;
sampleValue = Math.Min(sampleValue, 255);
sampleValue = Math.Max(sampleValue, 0);
Color color = ColorTable[(int)sampleValue];
Pen pen = PenTable[(int)sampleValue];
posX = Math.Min(posX, Width - 1);
posX = Math.Max(posX, 0);
if (pos > 0)
{
ImageBufferGraph.DrawLine(pen, lastX, lastY, posX, posY);
}
else
{
ImageBuffer.SetPixel(posX, posY, color);
}
lastX = posX;
lastY = posY;
}
}
else
{
for (int posX = 0; posX < Width; posX++)
{
int posY = WaterfallLine;
int pos = (int)(posX / ratioX);
pos = Math.Min(pos, samples.Length - 1);
pos = Math.Max(pos, 0);
double sampleValue = sampleToDBScale(samples[pos]);
sampleValue *= 256;
sampleValue = Math.Min(sampleValue, 255);
sampleValue = Math.Max(sampleValue, 0);
Color color = ColorTable[(int)sampleValue];
Pen pen = PenTable[(int)sampleValue];
if (pos > 0)
{
ImageBufferGraph.DrawLine(pen, lastX, lastY, posX, posY);
}
else
{
ImageBuffer.SetPixel(posX, posY, color);
}
lastX = posX;
lastY = posY;
}
}
SampleValues.Clear();
if (ShowFPS)
{
if (s.FrameNumber++ > 100 && s.FrameNumber % 20 == 0)
{
s.FPS = s.FrameNumber / DateTime.Now.Subtract(s.StartTime).TotalSeconds;
}
ImageBufferGraph.DrawString("FPS: " + (int)s.FPS, s.TextFont, Brushes.Cyan, 10, 10);
}
ImageGraph.DrawImage(ImageBuffer, 0, 0);
Invalidate();
/* scroll up for the next waterfall line */
if (++WaterfallLine > Height - 1)
{
WaterfallLine = Height - 1;
ImageBufferTmpGraph.DrawImage(ImageBuffer, ImageScrollRect, 0, 1, Width, Height - 1, GraphicsUnit.Pixel);
ImageBufferGraph.Clear(Color.Black);
ImageBufferGraph.DrawImage(ImageBufferTmp, 0, 0);
}
}
}
}
