#include?“Platform.h“
#include?“avsmallft.h“

static?void?drfti1（int?nfloat?*waint?*ifac）
{
????static?int?ntryh[4]?=?{?4235?};
????static?float?tpi?=?6.28318530717958648f;
????float?argarghargldfi;
????int?ntry=0ij=-1;
????int?k1?l1?l2?ib;
????int?ld?ii?ip?is?nq?nr;
????int?ido?ipm?nfm1;
????int?nl=n;
????int?nf=0;
?L101:
????j++;
????if?（j?????????ntry=ntryh[j];
????else
????????ntry+=2;
?L104:
????nq=nl/ntry;
????nr=nl-ntry*nq;
????if?（nr!=0）?goto?L101;
????nf++;
????ifac[nf+1]=ntry;
????nl=nq;
????if（ntry!=2）goto?L107;
????if（nf==1）goto?L107;
????for?（i=1;i????{
????????ib=nf-i+1;
????????ifac[ib+1]=ifac[ib];
????}
????ifac[2]?=?2;
?L107:
????if（nl!=1）goto?L104;
????ifac[0]=n;
????ifac[1]=nf;
????argh=tpi/n;
????is=0;
????nfm1=nf-1;
????l1=1;
????if（nfm1==0）return;
????for?（k1=0;k1????{
????????ip=ifac[k1+2];
????????ld=0;
????????l2=l1*ip;
????????ido=n/l2;
????????ipm=ip-1;
????????for?（j=0;j????????{
????????????ld?+=?l1;
????????????i?=?is;
????????????argld?=?（float）ld*argh;
????????????fi?=?0.f;
????????????for?（ii=2;ii????????????{
	????????????fi?+=?1.f;
	????????????arg?=?fi*argld;
	????????????wa[i++]?=?cosf（arg）;
	????????????wa[i++]?=?sinf（arg）;
????????????}
????????????is+=ido;
????????}
????????l1=l2;
????}
}

static?void?fdrffti（int?nfloat?*wsaveint?*ifac）
{
????if?（n?==?1）?return;
????drfti1（n?wsave+n?ifac）;
}

static?void?dradf2（int?idoint?l1float?*ccfloat?*chfloat?*wa1）
{
????int?ik;
????float?ti2tr2;
????int?t0t1t2t3t4t5t6;

????t1=0;
????t0=（t2=l1*ido）;
????t3=ido<<1;
????for（k=0;k????{
????????ch[t1<<1]=cc[t1]+cc[t2];
????????ch[（t1<<1）+t3-1]=cc[t1]-cc[t2];
????????t1+=ido;
????????t2+=ido;
????}

????if（ido<2）return;
????if（ido==2）goto?L105;

????t1=0;
????t2=t0;
????for（k=0;k????{
????????t3=t2;
????????t4=（t1<<1）+（ido<<1）;
????????t5=t1;
????????t6=t1+t1;
????????for（i=2;i????????{
????????????t3+=2;
????????????t4-=2;
????????????t5+=2;
????????????t6+=2;
????????????tr2=wa1[i-2]*cc[t3-1]+wa1[i-1]*cc[t3];
????????????ti2=wa1[i-2]*cc[t3]-wa1[i-1]*cc[t3-1];
????????????ch[t6]=cc[t5]+ti2;
????????????ch[t4]=ti2-cc[t5];
????????????ch[t6-1]=cc[t5-1]+tr2;
????????????ch[t4-1]=cc[t5-1]-tr2;
????????}
????????t1+=ido;
????????t2+=ido;
????}
????if（ido%2==1）return;
?L105:
????t3=（t2=（t1=ido）-1）;
????t2+=t0;
????for（k=0;k????{
????????ch[t1]=-cc[t2];
????????ch[t1-1]=cc[t3];
????????t1+=ido<<1;
????????t2+=ido;
????????t3+=ido;
????}
}

static?void?dradf4（int?idoint?l1float?*ccfloat?*chfloat?*wa1float?*wa2float?*wa3）
{
????static?float?hsqt2?=?.70710678118654752f;
????int?ikt0t1t2t3t4t5t6;
????float?ci2ci3ci4cr2cr3cr4ti1ti2ti3ti4tr1tr2tr3tr4;
????t0=l1*ido;
??
????t1=t0;
????t4=t1<<1;
????t2=t1+（t1<<1）;
????t3=0;

????for（k=0;k

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件??????26799??2015-08-17?10:31??TestNs\avsmallft.c

?????文件????????483??2015-08-17?10:23??TestNs\avsmallft.h

?????文件???????1277??2016-02-01?14:04??TestNs\fftwrap.c

?????文件????????497??2015-08-31?16:45??TestNs\fftwrap.h

?????文件???????7752??2016-08-07?16:38??TestNs\ns.c

?????文件????????399??2016-02-01?08:49??TestNs\ns.h

?????文件???????6607??2016-02-01?12:45??TestNs\Platform.h

?????文件???????1179??2016-08-07?15:45??TestNs\TestNs.cpp

?????文件???????4596??2016-02-02?09:39??TestNs\TestNs.vcxproj

?????文件???????1707??2016-02-02?09:39??TestNs\TestNs.vcxproj.filters

?????文件????????143??2016-02-02?09:35??TestNs\TestNs.vcxproj.user

?????文件???????1664??2016-02-01?16:27??TestNs\WavReader.cpp

?????文件????????759??2015-08-29?13:54??TestNs\WavReader.h

?????文件???????2215??2016-01-13?09:11??TestNs\WavWriter.cpp

?????文件????????687??2016-01-13?09:11??TestNs\WavWriter.h

?????文件????????885??2016-02-02?09:35??TestNs.sln

?????文件??????33900??2016-02-01?16:14??帶噪語音.wav

?????目錄??????????0??2016-03-17?13:03??TestNs

-----------?---------??----------?-----??----

????????????????91549????????????????????18