/// <summary>
/// Returns the size of the period for genConfigInfo in samples
/// </summary>
/// <remarks>
/// Preconditions: sample rate must be initialized in hostInfoOutputPort. If
/// genConfigInfo is for a beat synced generator then the time signature must also be
/// initialized in hostInfoOutputPort.
/// </remarks>
protected int GetPeriodSizeInSamples(GenEntryConfigInfo genConfigInfo)
{
if (genConfigInfo.PeriodType == GenPeriodType.BeatSynced ||
genConfigInfo.PeriodType == GenPeriodType.Bars)
{
Debug.Assert(hostInfoOutputPort.TimeSignatureIsInitialized == true);
Debug.Assert(hostInfoOutputPort.SampleRateIsInitialized == true);
double periodSizeInBars =
genConfigInfo.GetSizeOfBarsPeriod(hostInfoOutputPort.TimeSignatureNumerator,
hostInfoOutputPort.TimeSignatureDenominator);
double timeSig = (double)hostInfoOutputPort.TimeSignatureNumerator /
hostInfoOutputPort.TimeSignatureDenominator;
double beatsPerBar = timeSig / (1 / 4d);
double secondsPerBar = (beatsPerBar / hostInfoOutputPort.Tempo) * 60;
return((int)System.Math.Round(
secondsPerBar * periodSizeInBars * hostInfoOutputPort.SampleRate));
}
else if (genConfigInfo.PeriodType == GenPeriodType.Time)
{
Debug.Assert(hostInfoOutputPort.SampleRateIsInitialized == true);
return((int)System.Math.Round(
(genConfigInfo.TimePeriodInMs / 1000d) * hostInfoOutputPort.SampleRate));
}
else
{
//Unexpected GenPeriodType
Debug.Assert(false);
return(1000);
}
}
/// <summary>
/// Get the relative position into the beat synced period for genInfo at sampleTime
/// </summary>
/// <remarks>
/// Preconditions: genInfo refers to a beat synced generator. CalculatedBarZero and
/// TimeSignature have been initialized in hostInfoOutputPort.
/// </remarks>
protected double GetRelPosInBeatSyncedPeriod(GenEntryConfigInfo genInfo,
long sampleTime)
{
Debug.Assert(genInfo.PeriodType == GenPeriodType.BeatSynced);
Debug.Assert(hostInfoOutputPort.CalculatedBarZeroIsInitialized == true);
Debug.Assert(hostInfoOutputPort.TimeSignatureIsInitialized == true);
//TODO: Need to rethink notion of beat synced gen. Maybe it should just by like a time based gen
//that can adjust to a changing tempo instead of jumping to a particular part of the bar.
//Need to cover two use cases
//LFO that runs on off time quarter note
//LFO that is looped and enabled so it should start at bar 0 and always keep in time.
double barPos = hostInfoOutputPort.GetBarPosAtSampleTime(sampleTime);
double periodSizeInBars =
genInfo.GetSizeOfBarsPeriod(hostInfoOutputPort.TimeSignatureNumerator,
hostInfoOutputPort.TimeSignatureDenominator);
return(barPos % periodSizeInBars / periodSizeInBars);
}
/// <summary>
/// Get the relative position into the beat synced period for genInfo at sampleTime
/// </summary>
/// <remarks>
/// Preconditions: genInfo refers to a beat synced generator. CalculatedBarZero and
/// TimeSignature have been initialized in hostInfoOutputPort.
/// </remarks>
protected double GetRelPosInBeatSyncedPeriod(GenEntryConfigInfo genInfo,
long sampleTime)
{
Debug.Assert(genInfo.PeriodType == GenPeriodType.BeatSynced);
Debug.Assert(hostInfoOutputPort.CalculatedBarZeroIsInitialized == true);
Debug.Assert(hostInfoOutputPort.TimeSignatureIsInitialized == true);
//TODO: Need to rethink notion of beat synced gen. Maybe it should just by like a time based gen
//that can adjust to a changing tempo instead of jumping to a particular part of the bar.
//Need to cover two use cases
//LFO that runs on off time quarter note
//LFO that is looped and enabled so it should start at bar 0 and always keep in time.
double barPos = hostInfoOutputPort.GetBarPosAtSampleTime(sampleTime);
double periodSizeInBars =
genInfo.GetSizeOfBarsPeriod(hostInfoOutputPort.TimeSignatureNumerator,
hostInfoOutputPort.TimeSignatureDenominator);
return barPos % periodSizeInBars / periodSizeInBars;
}
/// <summary>
/// Returns the size of the period for genConfigInfo in samples
/// </summary>
/// <remarks>
/// Preconditions: sample rate must be initialized in hostInfoOutputPort. If
/// genConfigInfo is for a beat synced generator then the time signature must also be
/// initialized in hostInfoOutputPort.
/// </remarks>
protected int GetPeriodSizeInSamples(GenEntryConfigInfo genConfigInfo)
{
if (genConfigInfo.PeriodType == GenPeriodType.BeatSynced ||
genConfigInfo.PeriodType == GenPeriodType.Bars)
{
Debug.Assert(hostInfoOutputPort.TimeSignatureIsInitialized == true);
Debug.Assert(hostInfoOutputPort.SampleRateIsInitialized == true);
double periodSizeInBars =
genConfigInfo.GetSizeOfBarsPeriod(hostInfoOutputPort.TimeSignatureNumerator,
hostInfoOutputPort.TimeSignatureDenominator);
double timeSig = (double)hostInfoOutputPort.TimeSignatureNumerator /
hostInfoOutputPort.TimeSignatureDenominator;
double beatsPerBar = timeSig / (1/4d);
double secondsPerBar = (beatsPerBar / hostInfoOutputPort.Tempo) * 60;
return (int)System.Math.Round(
secondsPerBar * periodSizeInBars * hostInfoOutputPort.SampleRate);
}
else if (genConfigInfo.PeriodType == GenPeriodType.Time)
{
Debug.Assert(hostInfoOutputPort.SampleRateIsInitialized == true);
return (int)System.Math.Round(
(genConfigInfo.TimePeriodInMs / 1000d) * hostInfoOutputPort.SampleRate);
}
else
{
//Unexpected GenPeriodType
Debug.Assert(false);
return 1000;
}
}
