/// <summary>
/// Forms polylines that show input and output audio samples
/// </summary>
private void SetPolylines()
{
if (Input.Points is null || Output.Points is null)
{
return;
}
// clear polylines
Input.Points.Clear();
Output.Points.Clear();
// calculate position in audio track to show click
//in the center of this CW
var cwStartPos = (int)(
_audioClickBinded.StartPosition +
_audioClickBinded.Length / 2 -
MainGrid.Width / 2);
// set Input polyline
for (var i = 0; i < MainGrid.Width; i++)
{
var s = _audio.GetInputSample(_channelType, cwStartPos + i);
double y = 100 * (-s + 1) / 2;
Input.Points.Add(new Point(i, y));
}
// set Output polyline two samples wider than click
for (var i = _audioClickBinded.StartPosition - cwStartPos - 1;
i <= _audioClickBinded.StartPosition - cwStartPos + _audioClickBinded.Length + 1;
i++)
{
var s = _audio.GetOutputSample(_channelType, cwStartPos + i);
double y = 100 * (-s + 1) / 2;
Output.Points.Add(new Point(i, y));
}
}