// PCMVolumeMaximizer.h: interface for the PCMVolumeMaximizer class.
//
//////////////////////////////////////////////////////////////////////

#ifndef AFX_PCMVOLUMEMAXIMIZER_H__9754890C_0316_417C_8C4A_7C6E36ACF745__INCLUDED_
#define AFX_PCMVOLUMEMAXIMIZER_H__9754890C_0316_417C_8C4A_7C6E36ACF745__INCLUDED_

#define NUM_BINS 256

#include "AudioTransformer.h"

class AverageCalculator
{
public:
	AverageCalculator(Tracer *tracer) { Reset(); this->tracer = tracer; calculationInterval = 100; }
	virtual ~AverageCalculator() {}
	int Reset() { runningTotal = 0; runningIntervalCount = 0; return 0;}
	int SetCalculationInterval(int interval) { Reset(); if (interval > 0) calculationInterval = interval; return calculationInterval; }
	int TakeNextValue(double value)
	{
		runningTotal += value;
		if (++runningIntervalCount >= calculationInterval)
		{
			tracer->tracef(ARB, "AverageCalculator : average over last %d samples was %f\n", runningIntervalCount, runningTotal/runningIntervalCount);
			Reset();
		}
		return 0;
	}
private:
	int calculationInterval;
	double runningTotal;
	int runningIntervalCount;
	Tracer *tracer;
};

class PCMVolumeMaximizer : public AudioTransformer  
{
public:
	PCMVolumeMaximizer();
	virtual ~PCMVolumeMaximizer();
	int TransformStarted();
	int SetMaximizePercentile(double percentile);
	int SetMaximumAmplification(unsigned int amplification);	// multiplied by 100. so value of 100 = amplification of 1.0. value of 420 = amplification of 4.2
	int SetTraceLevel();
protected:
	int TransformAudioSamples(std::vector<std::pair<AudioSample *, AudioSource *> > &data, AudioSample **ppAudioSample);
private:
	double maximizePercentile;
	unsigned int maximumAmplification;
	int bins[NUM_BINS];
	AverageCalculator averageVolumeCalculator;
};

#endif // !defined(AFX_PCMVOLUMEMAXIMIZER_H__9754890C_0316_417C_8C4A_7C6E36ACF745__INCLUDED_)