goertzel.h

void InitGoertzel(void) 作用：初始化算法参数 用法：采用算法进行检测前执行一次

// Goertzel.h: interface for the CGoertzel class.
//
//////////////////////////////////////////////////////////////////////

#if !defined(AFX_GOERTZEL_H__157E6CFF_A32A_4C03_8DDC_127E15E60A3D__INCLUDED_)
#define AFX_GOERTZEL_H__157E6CFF_A32A_4C03_8DDC_127E15E60A3D__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000


class CGoertzel  
{
public:
	void SetParameter(DWORD, DWORD, DWORD);
	float GetMagnitude(unsigned char*, int length);
	CGoertzel();
	CGoertzel(DWORD, DWORD, DWORD);
	virtual ~CGoertzel();

	void InitGoertzel(void);
	void ResetGoertzel(void);
	void ProcessSample(unsigned char sample);
	void GetRealImag(float *realPart, float *imagPart);
	float GetOptimizedMagnitudeSquared(void);

private:
	DWORD m_sampleRate;
	DWORD m_targetFrequency;
	DWORD m_blockSize;


};

#endif // !defined(AFX_GOERTZEL_H__157E6CFF_A32A_4C03_8DDC_127E15E60A3D__INCLUDED_)