Adding energy getter for hdft

include/ITAHDFTSpectra.h

@@ -92,6 +92,9 @@ public:
 	//! Copy from another Spectra
 	void CopyFrom(const ITAHDFTSpectra* otherSpectra);
 
+	//! Returns maximum energy from all spectra
+	float GetMaxEnergy( int* piChannelIndex = nullptr ) const;
+
 	//! Subscript operator gives direct access to spectrum channel
 	const ITAHDFTSpectrum* operator[]( const int ) const;
 	ITAHDFTSpectrum* operator[]( const int );

src/ITAHDFTSpectra.cpp

 #include <ITAHDFTSpectra.h>
 
 #include <ITAAudiofileWriter.h>
+#include <ITAConstants.h>
 #include <ITAFilesystemUtils.h>
 #include <ITAHDFTSpectrum.h>
 #include <ITASampleFrame.h>
@@ -41,6 +42,23 @@ ITAHDFTSpectra::~ITAHDFTSpectra()
 		delete m_vpSpectra[i];
 }
 
+float ITAHDFTSpectra::GetMaxEnergy( int* piIdx ) const
+{
+	float fEnergyTemp;
+	float fEnergyMax = -1.0f;
+	for (size_t n = 0; n < m_vpSpectra.size(); n++)
+	{
+		fEnergyTemp = m_vpSpectra[n]->getEnergy();
+		if (fEnergyTemp > fEnergyMax)
+		{
+			fEnergyMax = fEnergyTemp;
+			*piIdx = n;
+		}
+	}
+
+	return fEnergyMax;
+}
+
 void ITAHDFTSpectra::CopyFrom(const ITAHDFTSpectra *otherSpectra)
 {
 	int iNumChannels=otherSpectra->GetNumChannels();