diff options
Diffstat (limited to 'src/c/signalProcessing/transforms/idct/cidcta.c')
| -rw-r--r-- | src/c/signalProcessing/transforms/idct/cidcta.c | 43 |
1 files changed, 32 insertions, 11 deletions
diff --git a/src/c/signalProcessing/transforms/idct/cidcta.c b/src/c/signalProcessing/transforms/idct/cidcta.c index e6c746c..ae98ba1 100644 --- a/src/c/signalProcessing/transforms/idct/cidcta.c +++ b/src/c/signalProcessing/transforms/idct/cidcta.c @@ -14,7 +14,8 @@ #include "idct.h" #include "addition.h" #include "types.h" -#include "floatComplex.h" +#include "floatComplex.h" +#include "multiplication.h" /*#include "matrixMultiplication"*/ /*#include <fftw3.h>*/ #include <math.h> @@ -24,10 +25,10 @@ void cidcta(floatComplex *in,int row,int col,floatComplex *out) int i,j,k,u,v; int n=col; int x,y; - float res,ress; + float res,ress,vv,ff; float re,z,q,m; floatComplex accu = FloatComplex(0, 0); - floatComplex temp,mm; + floatComplex temp,mm,aa,bb; if(row==1) { res=1./sqrt(n); @@ -46,12 +47,14 @@ void cidcta(floatComplex *in,int row,int col,floatComplex *out) if(y==0) { q=res*(cos(((M_PI)*(j)*(v+1./2.))/n)); - out[x]=cadds(out[x],in[y]*q); + aa=FloatComplex(q,0); + out[x]=cadds(out[x],cmuls(in[y],aa)); } else { q=ress*(cos(((M_PI)*(j)*(v+1./2.))/n)); - out[x]=cadds(out[x],in[y]*q); + aa=FloatComplex(q,0); + out[x]=cadds(out[x],cmuls(in[y],aa)); } } } @@ -77,19 +80,37 @@ void cidcta(floatComplex *in,int row,int col,floatComplex *out) y=row*j+i; mm=in[j*row+i]; z=(float)(((float)v+1.0/2.0)*(float)j); - q=(float)(M_PI/(float)col); - mm=mm*(cos(q*z)); + q=(float)(M_PI/(float)col); + vv=cos(q*z); + aa=FloatComplex(vv,0); + mm=cmuls(mm,aa); if(j==0) - temp=cadds(temp,mm*(1./sqrt((float)col))); + { + vv=1./sqrt((float)col); + aa=FloatComplex(vv,0); + temp=cadds(temp,cmuls(mm,aa)); + } else - temp=cadds(temp,mm*sqrt(2./col)); + { + vv=sqrt(2./col); + aa=FloatComplex(vv,0); + temp=cadds(temp,cmuls(mm,aa)); + } } z=(float)(((float)u+1.0/2.0)*(float)i); q=(float)(M_PI/(float)row); if(i==0) - out[x]=cadds(out[x],temp*((cos(z*q))*(1./sqrt(row)))); + { + vv=(cos(z*q))*(1./sqrt(row)); + aa=FloatComplex(vv,0); + out[x]=cadds(out[x],cmuls(temp,aa)); + } else - out[x]=cadds(out[x],temp*((cos(z*q))*sqrt(2./row))); + { + vv=(cos(z*q))*sqrt(2./row); + aa=FloatComplex(vv,0); + out[x]=cadds(out[x],cmuls(temp,aa)); + } } } } |