/********************************************************************
* *
- * THIS FILE IS PART OF THE Ogg Vorbis SOFTWARE CODEC SOURCE CODE. *
- * USE, DISTRIBUTION AND REPRODUCTION OF THIS SOURCE IS GOVERNED BY *
- * THE GNU PUBLIC LICENSE 2, WHICH IS INCLUDED WITH THIS SOURCE. *
- * PLEASE READ THESE TERMS DISTRIBUTING. *
+ * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. *
+ * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
+ * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
+ * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
* *
- * THE OggSQUISH SOURCE CODE IS (C) COPYRIGHT 1994-2000 *
- * by Monty <monty@xiph.org> and The XIPHOPHORUS Company *
- * http://www.xiph.org/ *
+ * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2009 *
+ * by the Xiph.Org Foundation http://www.xiph.org/ *
* *
********************************************************************
function: *unnormalized* fft transform
- last mod: $Id: smallft.c,v 1.7 2000/02/09 22:04:16 xiphmont Exp $
-********************************************************************/
+ ********************************************************************/
/* FFT implementation from OggSquish, minus cosine transforms,
* minus all but radix 2/4 case. In Vorbis we only need this
#include <string.h>
#include <math.h>
#include "smallft.h"
+#include "os.h"
+#include "misc.h"
-static void drfti1(int n, double *wa, int *ifac){
+static void drfti1(int n, float *wa, int *ifac){
static int ntryh[4] = { 4,2,3,5 };
- static double tpi = 6.28318530717958647692528676655900577;
- double arg,argh,argld,fi;
+ static float tpi = 6.28318530717958648f;
+ float arg,argh,argld,fi;
int ntry=0,i,j=-1;
int k1, l1, l2, ib;
int ld, ii, ip, is, nq, nr;
for (j=0;j<ipm;j++){
ld+=l1;
i=is;
- argld=(double)ld*argh;
- fi=0.;
+ argld=(float)ld*argh;
+ fi=0.f;
for (ii=2;ii<ido;ii+=2){
- fi+=1.;
- arg=fi*argld;
- wa[i++]=cos(arg);
- wa[i++]=sin(arg);
+ fi+=1.f;
+ arg=fi*argld;
+ wa[i++]=cos(arg);
+ wa[i++]=sin(arg);
}
is+=ido;
}
}
}
-static void fdrffti(int n, double *wsave, int *ifac){
+static void fdrffti(int n, float *wsave, int *ifac){
if (n == 1) return;
drfti1(n, wsave+n, ifac);
}
-static void dradf2(int ido,int l1,double *cc,double *ch,double *wa1){
+static void dradf2(int ido,int l1,float *cc,float *ch,float *wa1){
int i,k;
- double ti2,tr2;
+ float ti2,tr2;
int t0,t1,t2,t3,t4,t5,t6;
t1=0;
t1+=ido;
t2+=ido;
}
-
+
if(ido<2)return;
if(ido==2)goto L105;
}
}
-static void dradf4(int ido,int l1,double *cc,double *ch,double *wa1,
- double *wa2,double *wa3){
- static double hsqt2 = .70710678118654752440084436210485;
+static void dradf4(int ido,int l1,float *cc,float *ch,float *wa1,
+ float *wa2,float *wa3){
+ static float hsqt2 = .70710678118654752f;
int i,k,t0,t1,t2,t3,t4,t5,t6;
- double ci2,ci3,ci4,cr2,cr3,cr4,ti1,ti2,ti3,ti4,tr1,tr2,tr3,tr4;
+ float ci2,ci3,ci4,cr2,cr3,cr4,ti1,ti2,ti3,ti4,tr1,tr2,tr3,tr4;
t0=l1*ido;
-
+
t1=t0;
t4=t1<<1;
t2=t1+(t1<<1);
if(ido&1)return;
L105:
-
+
t2=(t1=t0+ido-1)+(t0<<1);
t3=ido<<2;
t4=ido;
}
}
-static void dradfg(int ido,int ip,int l1,int idl1,double *cc,double *c1,
- double *c2,double *ch,double *ch2,double *wa){
+static void dradfg(int ido,int ip,int l1,int idl1,float *cc,float *c1,
+ float *c2,float *ch,float *ch2,float *wa){
- static double tpi=6.28318530717958647692528676655900577;
+ static float tpi=6.283185307179586f;
int idij,ipph,i,j,k,l,ic,ik,is;
int t0,t1,t2,t3,t4,t5,t6,t7,t8,t9,t10;
- double dc2,ai1,ai2,ar1,ar2,ds2;
+ float dc2,ai1,ai2,ar1,ar2,ds2;
int nbd;
- double dcp,arg,dsp,ar1h,ar2h;
+ float dcp,arg,dsp,ar1h,ar2h;
int idp2,ipp2;
-
- arg=tpi/(double)ip;
+
+ arg=tpi/(float)ip;
dcp=cos(arg);
dsp=sin(arg);
ipph=(ip+1)>>1;
}
}
- ar1=1.;
- ai1=0.;
+ ar1=1.f;
+ ai1=0.f;
t1=0;
t2=ipp2*idl1;
t3=(ip-1)*idl1;
}
}
-static void drftf1(int n,double *c,double *ch,double *wa,int *ifac){
+static void drftf1(int n,float *c,float *ch,float *wa,int *ifac){
int i,k1,l1,l2;
int na,kh,nf;
int ip,iw,ido,idl1,ix2,ix3;
for(i=0;i<n;i++)c[i]=ch[i];
}
-static void dradb2(int ido,int l1,double *cc,double *ch,double *wa1){
+static void dradb2(int ido,int l1,float *cc,float *ch,float *wa1){
int i,k,t0,t1,t2,t3,t4,t5,t6;
- double ti2,tr2;
+ float ti2,tr2;
t0=l1*ido;
-
+
t1=0;
t2=0;
t3=(ido<<1)-1;
}
}
-static void dradb3(int ido,int l1,double *cc,double *ch,double *wa1,
- double *wa2){
- static double taur = -.5;
- static double taui = .86602540378443864676372317075293618;
+static void dradb3(int ido,int l1,float *cc,float *ch,float *wa1,
+ float *wa2){
+ static float taur = -.5f;
+ static float taui = .8660254037844386f;
int i,k,t0,t1,t2,t3,t4,t5,t6,t7,t8,t9,t10;
- double ci2,ci3,di2,di3,cr2,cr3,dr2,dr3,ti2,tr2;
+ float ci2,ci3,di2,di3,cr2,cr3,dr2,dr3,ti2,tr2;
t0=l1*ido;
t1=0;
}
}
-static void dradb4(int ido,int l1,double *cc,double *ch,double *wa1,
- double *wa2,double *wa3){
- static double sqrt2=1.4142135623730950488016887242097;
+static void dradb4(int ido,int l1,float *cc,float *ch,float *wa1,
+ float *wa2,float *wa3){
+ static float sqrt2=1.414213562373095f;
int i,k,t0,t1,t2,t3,t4,t5,t6,t7,t8;
- double ci2,ci3,ci4,cr2,cr3,cr4,ti1,ti2,ti3,ti4,tr1,tr2,tr3,tr4;
+ float ci2,ci3,ci4,cr2,cr3,cr4,ti1,ti2,ti3,ti4,tr1,tr2,tr3,tr4;
t0=l1*ido;
-
+
t1=0;
t2=ido<<2;
t3=0;
t4=t3+t6;
t5=t1;
tr3=cc[t4-1]+cc[t4-1];
- tr4=cc[t4]+cc[t4];
+ tr4=cc[t4]+cc[t4];
tr1=cc[t3]-cc[(t4+=t6)-1];
tr2=cc[t3]+cc[t4-1];
ch[t5]=tr2+tr3;
}
}
-static void dradbg(int ido,int ip,int l1,int idl1,double *cc,double *c1,
- double *c2,double *ch,double *ch2,double *wa){
- static double tpi=6.28318530717958647692528676655900577;
+static void dradbg(int ido,int ip,int l1,int idl1,float *cc,float *c1,
+ float *c2,float *ch,float *ch2,float *wa){
+ static float tpi=6.283185307179586f;
int idij,ipph,i,j,k,l,ik,is,t0,t1,t2,t3,t4,t5,t6,t7,t8,t9,t10,
t11,t12;
- double dc2,ai1,ai2,ar1,ar2,ds2;
+ float dc2,ai1,ai2,ar1,ar2,ds2;
int nbd;
- double dcp,arg,dsp,ar1h,ar2h;
+ float dcp,arg,dsp,ar1h,ar2h;
int ipp2;
t10=ip*ido;
t0=l1*ido;
- arg=tpi/(double)ip;
+ arg=tpi/(float)ip;
dcp=cos(arg);
dsp=sin(arg);
nbd=(ido-1)>>1;
ipp2=ip;
ipph=(ip+1)>>1;
if(ido<l1)goto L103;
-
+
t1=0;
t2=0;
for(k=0;k<l1;k++){
}
L116:
- ar1=1.;
- ai1=0.;
+ ar1=1.f;
+ ai1=0.f;
t1=0;
t9=(t2=ipp2*idl1);
t3=(ip-1)*idl1;
}
}
-static void drftb1(int n, double *c, double *ch, double *wa, int *ifac){
+static void drftb1(int n, float *c, float *ch, float *wa, int *ifac){
int i,k1,l1,l2;
int na;
int nf,ip,iw,ix2,ix3,ido,idl1;
for(i=0;i<n;i++)c[i]=ch[i];
}
-void drft_forward(drft_lookup *l,double *data){
+void drft_forward(drft_lookup *l,float *data){
if(l->n==1)return;
drftf1(l->n,data,l->trigcache,l->trigcache+l->n,l->splitcache);
}
-void drft_backward(drft_lookup *l,double *data){
+void drft_backward(drft_lookup *l,float *data){
if (l->n==1)return;
drftb1(l->n,data,l->trigcache,l->trigcache+l->n,l->splitcache);
}
void drft_init(drft_lookup *l,int n){
l->n=n;
- l->trigcache=calloc(3*n,sizeof(double));
- l->splitcache=calloc(32,sizeof(int));
+ l->trigcache=_ogg_calloc(3*n,sizeof(*l->trigcache));
+ l->splitcache=_ogg_calloc(32,sizeof(*l->splitcache));
fdrffti(n, l->trigcache, l->splitcache);
}
void drft_clear(drft_lookup *l){
if(l){
- if(l->trigcache)free(l->trigcache);
- if(l->splitcache)free(l->splitcache);
- memset(l,0,sizeof(drft_lookup));
+ if(l->trigcache)_ogg_free(l->trigcache);
+ if(l->splitcache)_ogg_free(l->splitcache);
+ memset(l,0,sizeof(*l));
}
}
projects / platform / upstream / libvorbis.git / blobdiff