#ifndef MAYER_H
#define MAYER_H

#define REAL float

//void mayer_realfft(int n, REAL* real);
//void mayer_realifft(int n, REAL* real);
class MayerFFT {
public:
	void realfft(int n, REAL* real);
	void realifft(int n, REAL* real);

	MayerFFT() :halsec{
		 0,
		 0,
		 .54119610014619698439972320536638942006107206337801,
		 .50979557910415916894193980398784391368261849190893,
		 .50241928618815570551167011928012092247859337193963,
		 .50060299823519630134550410676638239611758632599591,
		 .50015063602065098821477101271097658495974913010340,
		 .50003765191554772296778139077905492847503165398345,
		 .50000941253588775676512870469186533538523133757983,
		 .50000235310628608051401267171204408939326297376426,
		 .50000058827484117879868526730916804925780637276181,
		 .50000014706860214875463798283871198206179118093251,
		 .50000003676714377807315864400643020315103490883972,
		 .50000000919178552207366560348853455333939112569380,
		 .50000000229794635411562887767906868558991922348920,
		 .50000000057448658687873302235147272458812263401372
		},
		costab{
		 .00000000000000000000000000000000000000000000000000,
		 .70710678118654752440084436210484903928483593768847,
		 .92387953251128675612818318939678828682241662586364,
		 .98078528040323044912618223613423903697393373089333,
		 .99518472667219688624483695310947992157547486872985,
		 .99879545620517239271477160475910069444320361470461,
		 .99969881869620422011576564966617219685006108125772,
		 .99992470183914454092164649119638322435060646880221,
		 .99998117528260114265699043772856771617391725094433,
		 .99999529380957617151158012570011989955298763362218,
		 .99999882345170190992902571017152601904826792288976,
		 .99999970586288221916022821773876567711626389934930,
		 .99999992646571785114473148070738785694820115568892,
		 .99999998161642929380834691540290971450507605124278,
		 .99999999540410731289097193313960614895889430318945,
		 .99999999885102682756267330779455410840053741619428
		},
		sintab{
		 1.0000000000000000000000000000000000000000000000000,
		 .70710678118654752440084436210484903928483593768846,
		 .38268343236508977172845998403039886676134456248561,
		 .19509032201612826784828486847702224092769161775195,
		 .09801714032956060199419556388864184586113667316749,
		 .04906767432741801425495497694268265831474536302574,
		 .02454122852291228803173452945928292506546611923944,
		 .01227153828571992607940826195100321214037231959176,
		 .00613588464915447535964023459037258091705788631738,
		 .00306795676296597627014536549091984251894461021344,
		 .00153398018628476561230369715026407907995486457522,
		 .00076699031874270452693856835794857664314091945205,
		 .00038349518757139558907246168118138126339502603495,
		 .00019174759731070330743990956198900093346887403385,
		 .00009587379909597734587051721097647635118706561284,
		 .00004793689960306688454900399049465887274686668768
		},
		coswrk{
		 .00000000000000000000000000000000000000000000000000,
		 .70710678118654752440084436210484903928483593768847,
		 .92387953251128675612818318939678828682241662586364,
		 .98078528040323044912618223613423903697393373089333,
		 .99518472667219688624483695310947992157547486872985,
		 .99879545620517239271477160475910069444320361470461,
		 .99969881869620422011576564966617219685006108125772,
		 .99992470183914454092164649119638322435060646880221,
		 .99998117528260114265699043772856771617391725094433,
		 .99999529380957617151158012570011989955298763362218,
		 .99999882345170190992902571017152601904826792288976,
		 .99999970586288221916022821773876567711626389934930,
		 .99999992646571785114473148070738785694820115568892,
		 .99999998161642929380834691540290971450507605124278,
		 .99999999540410731289097193313960614895889430318945,
		 .99999999885102682756267330779455410840053741619428
		},
		sinwrk{
		 1.0000000000000000000000000000000000000000000000000,
		 .70710678118654752440084436210484903928483593768846,
		 .38268343236508977172845998403039886676134456248561,
		 .19509032201612826784828486847702224092769161775195,
		 .09801714032956060199419556388864184586113667316749,
		 .04906767432741801425495497694268265831474536302574,
		 .02454122852291228803173452945928292506546611923944,
		 .01227153828571992607940826195100321214037231959176,
		 .00613588464915447535964023459037258091705788631738,
		 .00306795676296597627014536549091984251894461021344,
		 .00153398018628476561230369715026407907995486457522,
		 .00076699031874270452693856835794857664314091945205,
		 .00038349518757139558907246168118138126339502603495,
		 .00019174759731070330743990956198900093346887403385,
		 .00009587379909597734587051721097647635118706561284,
		 .00004793689960306688454900399049465887274686668768
		}

	{
	}
private:

	void fht(REAL* fz, int n);
	REAL halsec[20];
	REAL costab[20];
	REAL sintab[20];
	REAL coswrk[20];
	REAL sinwrk[20];
};

#endif