public static IAnalyticStream Window(
this IAnalyticStream stream,
Windowing.Function function = Windowing.Function.Hamming,
int smoothingSamples = 1000)
{
return(new AnalyticStreamWindower(stream, function,
smoothingSamples: smoothingSamples));
}
public static IBGCStream Window(
this IBGCStream stream,
double totalDuration,
Windowing.Function function = Windowing.Function.Hamming,
int smoothingSamples = 1000)
{
return(new StreamWindower(stream, function,
totalDuration: totalDuration,
smoothingSamples: smoothingSamples));
}
public StreamWindower(
IBGCStream stream,
Windowing.Function function = Windowing.Function.Hamming,
double totalDuration = double.NaN,
int smoothingSamples = 1000,
int sampleShift = 0,
TransformRMSBehavior rmsBehavior = TransformRMSBehavior.Passthrough)
: base(stream)
{
if (sampleShift > stream.ChannelSamples)
{
Debug.LogError("Requested a sampleOffset larger than clip length");
sampleShift = 0;
}
this.sampleShift = sampleShift;
if (!double.IsNaN(totalDuration))
{
ChannelSamples = Math.Min(
(int)Math.Round(totalDuration * SamplingRate),
stream.ChannelSamples - sampleShift);
TotalSamples = Channels * ChannelSamples;
}
else
{
if (stream.ChannelSamples == int.MaxValue)
{
ChannelSamples = int.MaxValue;
TotalSamples = int.MaxValue;
}
else
{
ChannelSamples = stream.ChannelSamples - sampleShift;
TotalSamples = Channels * ChannelSamples;
}
}
this.rmsBehavior = rmsBehavior;
smoothingSamples = Math.Min(smoothingSamples, ChannelSamples / 2);
openingWindow = Windowing.GetHalfWindow(function, smoothingSamples);
closingWindow = openingWindow;
endOpeningWindow = smoothingSamples;
startClosingWindow = ChannelSamples - smoothingSamples;
Reset();
}
public static IBGCStream Window(
this IBGCStream stream,
Windowing.Function openingFunction,
Windowing.Function closingFunction,
int openingSmoothingSamples = 1000,
int closingSmoothingSamples = 1000,
int sampleShift = 0,
int totalChannelSamples = -1)
{
return(new StreamWindower(
stream: stream,
openingFunction: openingFunction,
closingFunction: closingFunction,
openingSmoothingSamples: openingSmoothingSamples,
closingSmoothingSamples: closingSmoothingSamples,
sampleShift: sampleShift,
totalChannelSamples: totalChannelSamples));
}
public AnalyticStreamWindower(
IAnalyticStream stream,
Windowing.Function function,
double totalDuration = double.NaN,
int smoothingSamples = 1000,
int sampleOffset = 0,
TransformRMSBehavior rmsBehavior = TransformRMSBehavior.Passthrough)
: base(stream)
{
if (sampleOffset > stream.Samples)
{
Debug.LogError("Requested a sampleOffset larger than clip length");
sampleOffset = 0;
}
this.sampleOffset = sampleOffset;
if (!double.IsNaN(totalDuration))
{
Samples = Math.Min(
(int)(totalDuration * SamplingRate),
stream.Samples - sampleOffset);
}
else
{
Samples = stream.Samples - sampleOffset;
}
this.rmsBehavior = rmsBehavior;
smoothingSamples = Math.Min(smoothingSamples, Samples / 2);
window = Windowing.GetHalfWindow64(function, smoothingSamples);
endOpeningWindow = smoothingSamples;
startClosingWindow = Samples - smoothingSamples;
Reset();
}
public StreamWindower(
IBGCStream stream,
Windowing.Function function = Windowing.Function.Hamming,
double totalDuration = double.NaN,
int smoothingSamples = 1000,
int sampleOffset = 0,
bool recalculateRMS = false)
: base(stream)
{
if (sampleOffset > stream.ChannelSamples)
{
Debug.LogError("Requested a sampleOffset larger than clip length");
sampleOffset = 0;
}
this.sampleOffset = sampleOffset;
if (!double.IsNaN(totalDuration))
{
ChannelSamples = Math.Min(
(int)(totalDuration * SamplingRate),
stream.ChannelSamples - sampleOffset);
}
else
{
ChannelSamples = stream.ChannelSamples - sampleOffset;
}
this.recalculateRMS = recalculateRMS;
smoothingSamples = Math.Min(smoothingSamples, ChannelSamples / 2);
window = Windowing.GetHalfWindow(function, smoothingSamples);
endOpeningWindow = smoothingSamples;
startClosingWindow = ChannelSamples - smoothingSamples;
Reset();
}
public static string ToDisplayName(this Windowing.Function function)
{
switch (function)
{
case Windowing.Function.Hamming: return("Hamming");
case Windowing.Function.Hann: return("Hann");
case Windowing.Function.BlackmanHarris: return("Blackman-Harris");
case Windowing.Function.Sine: return("Sine");
case Windowing.Function.Linear: return("Triangular");
case Windowing.Function.Square: return("Square");
case Windowing.Function.Silence: return("Silence");
default:
UnityEngine.Debug.LogError($"Unexpected Windowing.Function: {function}");
return("");
}
}
public StreamWindower(
IBGCStream stream,
Windowing.Function openingFunction,
Windowing.Function closingFunction,
int openingSmoothingSamples = 1000,
int closingSmoothingSamples = 1000,
int sampleShift = 0,
int totalChannelSamples = -1,
TransformRMSBehavior rmsBehavior = TransformRMSBehavior.Passthrough)
: base(stream)
{
if (sampleShift > stream.ChannelSamples)
{
Debug.LogError("Requested a sampleOffset larger than clip length");
sampleShift = 0;
}
this.sampleShift = sampleShift;
this.rmsBehavior = rmsBehavior;
if (totalChannelSamples != -1)
{
ChannelSamples = Math.Min(
totalChannelSamples,
stream.ChannelSamples - sampleShift);
TotalSamples = Channels * ChannelSamples;
}
else
{
if (stream.ChannelSamples == int.MaxValue)
{
ChannelSamples = int.MaxValue;
TotalSamples = int.MaxValue;
}
else
{
ChannelSamples = stream.ChannelSamples - sampleShift;
TotalSamples = Channels * ChannelSamples;
}
}
if (openingSmoothingSamples + closingSmoothingSamples > ChannelSamples)
{
//Requested smoothing samples exceeded remaining stream length
int totalSmoothingSamples = openingSmoothingSamples + closingSmoothingSamples;
int excessSamples = ChannelSamples - totalSmoothingSamples;
//Allocate reduced smoothing samples based on requested percentage
openingSmoothingSamples -= (int)Math.Round(
excessSamples * (openingSmoothingSamples / (double)totalSmoothingSamples));
closingSmoothingSamples = ChannelSamples - openingSmoothingSamples;
}
openingWindow = Windowing.GetHalfWindow(openingFunction, openingSmoothingSamples);
closingWindow = Windowing.GetHalfWindow(closingFunction, closingSmoothingSamples);
endOpeningWindow = openingSmoothingSamples;
startClosingWindow = ChannelSamples - closingSmoothingSamples;
Reset();
}
