/* helper function to generate filter */
private static void HistogramFilter(
HistogramRec Histogram,
float[] Workspace,
int WorkspaceOffset,
int Length,
FirstOrderLowpassRec Lowpass)
{
switch (Histogram.FilterMethod)
{
default:
Debug.Assert(false);
throw new ArgumentException();
case HistogramPowerEstType.eHistogramAbsVal:
case HistogramPowerEstType.eHistogramSmoothedAbsVal:
FloatVectorAbsVal(
Workspace,
WorkspaceOffset,
Workspace,
WorkspaceOffset,
Length);
break;
case HistogramPowerEstType.eHistogramSmoothedRMS:
FloatVectorSquare(
Workspace,
WorkspaceOffset,
Workspace,
WorkspaceOffset,
Length);
break;
}
switch (Histogram.FilterMethod)
{
default:
Debug.Assert(false);
throw new ArgumentException();
case HistogramPowerEstType.eHistogramAbsVal:
break;
case HistogramPowerEstType.eHistogramSmoothedAbsVal:
case HistogramPowerEstType.eHistogramSmoothedRMS:
FirstOrderLowpassRec.ApplyFirstOrderLowpassVectorModify(
Lowpass,
Workspace,
WorkspaceOffset,
Length);
break;
}
switch (Histogram.FilterMethod)
{
default:
Debug.Assert(false);
throw new ArgumentException();
case HistogramPowerEstType.eHistogramAbsVal:
case HistogramPowerEstType.eHistogramSmoothedAbsVal:
break;
case HistogramPowerEstType.eHistogramSmoothedRMS:
FloatVectorSquareRoot(
Workspace,
WorkspaceOffset,
Length);
break;
}
}
/* apply analyzer to some stuff */
public SynthErrorCodes Apply(
float[] workspace,
int lOffset,
int rOffset,
int nActualFrames,
SynthParamRec synthParams)
{
this.FrameCount += nActualFrames;
#if DEBUG
Debug.Assert(!synthParams.ScratchWorkspace1InUse);
synthParams.ScratchWorkspace1InUse = true;
#endif
int LeftBufferOffset = synthParams.ScratchWorkspace1LOffset;
int RightBufferOffset = synthParams.ScratchWorkspace1ROffset;
/* build buffers */
FloatVectorCopy(
workspace,
lOffset,
workspace,
LeftBufferOffset,
nActualFrames);
FloatVectorCopy(
workspace,
rOffset,
workspace,
RightBufferOffset,
nActualFrames);
FloatVectorReductionMinMax(
ref this.LeftMinimum,
ref this.LeftMaximum,
workspace,
LeftBufferOffset,
nActualFrames);
FloatVectorReductionMinMax(
ref this.RightMinimum,
ref this.RightMaximum,
workspace,
RightBufferOffset,
nActualFrames);
/* compute power analysis */
if (this.PowerEnabled)
{
switch (this.PowerMethod)
{
default:
Debug.Assert(false);
throw new ArgumentException();
case AnalyzerPowerEstType.eAnalyzerPowerAbsVal:
{
float Min = 0;
/* absval the vector */
FloatVectorAbsVal(
workspace,
LeftBufferOffset,
workspace,
LeftBufferOffset,
nActualFrames);
FloatVectorAbsVal(
workspace,
RightBufferOffset,
workspace,
RightBufferOffset,
nActualFrames);
/* apply filter */
FirstOrderLowpassRec.ApplyFirstOrderLowpassVectorModify(
this.LeftLowpass,
workspace,
LeftBufferOffset,
nActualFrames);
FirstOrderLowpassRec.ApplyFirstOrderLowpassVectorModify(
this.RightLowpass,
workspace,
RightBufferOffset,
nActualFrames);
/* compute maximum */
FloatVectorReductionMinMax(
ref Min,
ref this.LeftPowerMaximum,
workspace,
LeftBufferOffset,
nActualFrames);
FloatVectorReductionMinMax(
ref Min,
ref this.RightPowerMaximum,
workspace,
RightBufferOffset,
nActualFrames);
}
break;
case AnalyzerPowerEstType.eAnalyzerPowerRMS:
{
float Min = 0;
/* square the vector */
FloatVectorSquare(
workspace,
LeftBufferOffset,
workspace,
LeftBufferOffset,
nActualFrames);
FloatVectorSquare(
workspace,
RightBufferOffset,
workspace,
RightBufferOffset,
nActualFrames);
/* apply filter */
FirstOrderLowpassRec.ApplyFirstOrderLowpassVectorModify(
this.LeftLowpass,
workspace,
LeftBufferOffset,
nActualFrames);
FirstOrderLowpassRec.ApplyFirstOrderLowpassVectorModify(
this.RightLowpass,
workspace,
RightBufferOffset,
nActualFrames);
/* compute square root */
FloatVectorSquareRoot(
workspace,
LeftBufferOffset,
nActualFrames);
FloatVectorSquareRoot(
workspace,
RightBufferOffset,
nActualFrames);
/* compute maximum */
FloatVectorReductionMinMax(
ref Min,
ref this.LeftPowerMaximum,
workspace,
LeftBufferOffset,
nActualFrames);
FloatVectorReductionMinMax(
ref Min,
ref this.RightPowerMaximum,
workspace,
RightBufferOffset,
nActualFrames);
}
break;
}
}
#if DEBUG
synthParams.ScratchWorkspace1InUse = false;
#endif
return(SynthErrorCodes.eSynthDone);
}