public void Draw(Envelope envelope, Graphics gr, Rectangle bounds)
{
var kx = 1f * bounds.Width / envelope.Length;
var ky = 1f * bounds.Height/2;
var cy = bounds.Top + bounds.Height/2;
var cx = bounds.Left;
using(var pen = new Pen(ForeColor))
for (int i = 0; i < envelope.Length; i++)
{
var x = i*kx;
var y = envelope[i] * ky;
gr.DrawLine(pen, cx + x, cy + y, cx + x, cy - y);
}
using (var pen = new Pen(ForeColor))
gr.DrawLine(pen, cx, cy, cx + bounds.Width, cy);
}
public virtual void Process(Audio item, AudioInfo info)
{
//build amplitude envelope
var s = Build(info.Samples);
//resample
var resampler = Factory.CreateResampler();
var resampled = resampler.Resample(s, info.Samples.Bitrate * ((float)EnvelopeLength / info.Samples.Values.Length));
//build packed array
var envelope = new Envelope(resampled);
//save into audio item
item.Data.Add(envelope);
//build volumeDescriptor
var volDesc = new VolumeDescriptor();
volDesc.Build(s.Values);
item.Data.Add(volDesc);
}