public void AddLR(WavData wd, int sampleNum, double start, double end)
{
double startTime = wd.RatioToTime(start);
double endTime = wd.RatioToTime(end);
double dt = (endTime - startTime) / sampleNum;
short[] left = wd.GetLeft(sampleNum, start, end);
short[] right = wd.GetRight(sampleNum, start, end);
chart.Series.Clear();
chart.Series.Add("L");
chart.Series["L"].ChartType = System.Windows.Forms.DataVisualization.Charting.SeriesChartType.Line;
for (int i = 0; i < left.Length; i++)
{
double x = startTime + dt * i;
chart.Series["L"].Points.AddXY(x, left[i]);
}
chart.Series.Add("R");
chart.Series["R"].ChartType = System.Windows.Forms.DataVisualization.Charting.SeriesChartType.Line;
for (int i = 0; i < right.Length; i++)
{
double x = startTime + dt * i;
chart.Series["R"].Points.AddXY(x, right[i]);
}
setXlim(startTime, endTime);
setYlim(Int16.MinValue + 1, Int16.MaxValue - 1);
}
short[] ComputeMean(int idx)
{
int left = 0;
int right = 0;
ArrayList listUnmuted = GetUnmutedItems();
int num = listUnmuted.Count;
double factorL = 0;
double factorR = 0;
for (int i = 0; i < num; i++)
{
try
{
WavData item = ((ItemSet)listUnmuted[i]).GetData();
left += item.GetLeft(idx);
right += item.GetRight(idx);
factorL += Math.Abs(item.GetFactor(idx, WavData.LEFT));
factorR += Math.Abs(item.GetFactor(idx, WavData.RIGHT));
}
catch (ArgumentOutOfRangeException)
{
// sometimes thrown when item removed while playing
// can be ignored
}
catch (NullReferenceException)
{
continue;
}
}
if (factorL == 0 && factorR == 0 && avoidAllMute)
{
WavData item = GetLastItem().GetData();
item.IsDefault = true;
left = item.GetLeft(idx);
right = item.GetRight(idx);
item.IsDefault = false;
factorL = 1;
factorR = 1;
}
short newLeft, newRight;
if (factorL > 1 || normalize)
{
newLeft = ToShortDevidedBy(left, factorL);
}
else
{
newLeft = Convert.ToInt16(left);
}
if (factorR > 1 || normalize)
{
newRight = ToShortDevidedBy(right, factorR);;
}
else
{
newRight = Convert.ToInt16(right);
}
return(new short[] { newLeft, newRight });
}