protected override void InnerDraw(Graphics g, int useLength)
{
int lastBand = -1; //последний активный столбик
float maxInLastBand = 0f; //максимальное значение частоты в последнем столбике
for (int i = 0; i < useLength; i++)
{
int band = (int)((float)i / useLength * BandsCount);
if (band > lastBand) //если сменился столбик
{
//обнуляем показатель
lastBand = band;
maxInLastBand = 0f;
}
float analogValue = DisplayRectangle.NormalizedHeight(SpectrumValues[i]);
if (analogValue > maxInLastBand)
{
maxInLastBand = analogValue; //пересохраняем частоту
DrawBand(g, band, analogValue);
}
}
}
protected override void InnerDraw(Graphics g, int useLength)
{
for (int i = 0; i < useLength; i++)
{
float x = DisplayRectangle.NormalizedWidth((float)i / useLength);
float height =
DisplayRectangle.NormalizedHeight(SpectrumValues[i]);
g.FillRectangle(Brush, DisplayRectangle.Left + x, DisplayRectangle.Bottom - height, 1, height);
}
}
public override void Draw(Graphics g)
{
var heightL = DisplayRectangle.NormalizedHeight(NormalizedVolumeL);
var heightR = DisplayRectangle.NormalizedHeight(NormalizedVolumeR);
g.FillRectangle(LeftBrush, DisplayRectangle.Left, DisplayRectangle.Bottom - heightL,
DisplayRectangle.CenterW, heightL);
g.FillRectangle(RightBrush, DisplayRectangle.CenterW, DisplayRectangle.Bottom - heightR,
DisplayRectangle.CenterW, heightR);
}
protected override void InnerDraw(Graphics g, int useLength)
{
float lastX = 0f;
float lastY = DisplayRectangle.Bottom;
for (int i = 0; i < useLength; i++)
{
float x = DisplayRectangle.NormalizedWidth((float)i / useLength);
float height =
DisplayRectangle.NormalizedHeight(SpectrumValues[i]);
var y = DisplayRectangle.Bottom - height;
g.DrawLine(_pen, lastX, lastY, x, y);
lastX = x;
lastY = y;
}
}
public override void Recreate()
{
int useSamples = SpectrumSamples >> 1;
if (ApplyTimeThinning)
{
useSamples >>= 1;
}
useSamples = (int)(useSamples * TrimmingFrequency / 20000f);
Task.Run(() =>
{
Parallel.For(0, (int)DisplayRectangle.Width, (i, loopState) =>
{
float[] heightPixels = new float[(int)DisplayRectangle.Height + 1];
if (Canceled)
{
loopState.Break();
return;
}
float realPosition = Math.Min(i / DisplayRectangle.Width,
(float)(FileData.samplesCount - SpectrumSamples) / FileData.samplesCount);
float[] spectrum;
lock (FftProvider)
{
spectrum = FileData.GetSpectrumForPosition(realPosition, FftProvider);
}
for (int j = 0; j < useSamples; j++)
{
int yPosition = (int)(DisplayRectangle.Height -
DisplayRectangle.NormalizedHeight((float)j / useSamples));
heightPixels[yPosition] = spectrum[j];
}
for (int j = 0; j < (int)DisplayRectangle.Height; j++)
{
Diagram.SetPixel(i, j, IntensityToArgb(heightPixels[j]));
}
});
});
}