void DrawFrame(FFTFrame frame)
{
var len = _bitmap.Height;
var dat = frame.Data;
float factor = 1 / (DbMax - DbMin) * 255;
for (int y = 0; y < len; y++)
{
var db = 10 * Math.Log(Math.Sqrt(dat[y]));
var v = (int)((db - DbMin) * factor);
if (v < 0)
{
v = 0;
}
else if (v > 255)
{
v = 255;
}
colorBuffer[len - y - 1] = _palette[v].ToArgb();
}
_bitmap.AddFrame(colorBuffer);
}
void CreateFrameBuffer()
{
_frames = new Queue <FFTFrame>(FFTCapacity);
for (int i = 0; i < FFTCapacity; i++)
{
var frame = new FFTFrame(FFTSize, samplerate);
_frames.Enqueue(frame);
}
}
void BitmapAddFrame(FFTFrame frame)
{
DrawFrame(frame);
}