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#include "ltfat.h"
#include "ltfat_types.h"
#define CH(name) LTFAT_COMPLEXH(name)
#define POSTPROC_REAL \
for (ltfatInt n=0;n<N*W;n+=2) \
{ \
pcoef[0]=CH(creal)(pcoef2[0]); \
\
for (ltfatInt m=1;m<M;m+=2) \
{ \
pcoef[m]=-scalconst*CH(cimag)(pcoef2[m]); \
pcoef[m+M]=scalconst*CH(creal)(pcoef2[m+coef2_ld]); \
} \
\
for (ltfatInt m=2;m<M;m+=2) \
{ \
pcoef[m]=scalconst*CH(creal)(pcoef2[m]); \
pcoef[m+M]=-scalconst*CH(cimag)(pcoef2[m+coef2_ld]); \
} \
\
pcoef[M]=CH(creal)(pcoef2[M+nyquestadd]); \
pcoef+=2*M; \
pcoef2+=2*coef2_ld; \
}
#define POSTPROC_COMPLEX \
for (ltfatInt n=0;n<N*W;n+=2) \
{ \
pcoef[0] = pcoef2[0]; \
\
for (ltfatInt m=1;m<M;m+=2) \
{ \
pcoef[m] = scalconst*I*(pcoef2[m]-pcoef2[M2-m]); \
pcoef[m+M]=scalconst*(pcoef2[m+M2]+pcoef2[M4-m]); \
} \
\
for (ltfatInt m=2;m<M;m+=2) \
{ \
pcoef[m] = scalconst*(pcoef2[m]+pcoef2[M2-m]); \
pcoef[m+M] = scalconst*I*(pcoef2[m+M2]-pcoef2[M4-m]); \
} \
\
pcoef[M]=pcoef2[M+nyquestadd]; \
pcoef+=M2; \
pcoef2+=M4; \
}
LTFAT_EXTERN void
LTFAT_NAME_COMPLEX(dwilt_long)(const LTFAT_COMPLEX *f, const LTFAT_COMPLEX *g,
const ltfatInt L, const ltfatInt W,
const ltfatInt M, LTFAT_COMPLEX *cout)
{
const ltfatInt N=L/M;
const ltfatInt M2=2*M;
const ltfatInt M4=4*M;
const LTFAT_REAL scalconst = 1.0/sqrt(2.0);
LTFAT_COMPLEX *coef2 = ltfat_malloc(2*M*N*W*sizeof*coef2);
/* coef2=comp_dgt(f,g,a,2*M,L); */
LTFAT_NAME_COMPLEX(dgt_long)(f, g, L, W, M, 2*M, FREQINV, coef2);
const ltfatInt nyquestadd = (M%2)*M2;
LTFAT_COMPLEX *pcoef = cout;
LTFAT_COMPLEX *pcoef2 = coef2;
POSTPROC_COMPLEX
ltfat_free(coef2);
}
LTFAT_EXTERN void
LTFAT_NAME_REAL(dwilt_long)(const LTFAT_REAL *f, const LTFAT_REAL *g,
const ltfatInt L, const ltfatInt W,
const ltfatInt M, LTFAT_REAL *cout)
{
const ltfatInt N=L/M;
const ltfatInt coef2_ld = M+1;
const LTFAT_REAL scalconst = sqrt(2.0);
const ltfatInt nyquestadd = (M%2)*coef2_ld;
LTFAT_COMPLEX *coef2 = ltfat_malloc((M+1)*N*W*sizeof*coef2);
/* coef2=comp_dgt(f,g,a,2*M,L); */
LTFAT_NAME(dgtreal_long)(f, g, L, W, M, 2*M, FREQINV,coef2);
LTFAT_REAL *pcoef = cout;
LTFAT_COMPLEX *pcoef2 = coef2;
POSTPROC_REAL
ltfat_free(coef2);
}
LTFAT_EXTERN void
LTFAT_NAME_COMPLEX(dwilt_fb)(const LTFAT_COMPLEX *f, const LTFAT_COMPLEX *g,
const ltfatInt L, const ltfatInt gl,
const ltfatInt W, const ltfatInt M,
LTFAT_COMPLEX *cout)
{
const ltfatInt N=L/M;
const ltfatInt M2=2*M;
const ltfatInt M4=4*M;
const LTFAT_REAL scalconst = 1.0/sqrt(2.0);
LTFAT_COMPLEX *coef2 = ltfat_malloc(2*M*N*W*sizeof*coef2);
/* coef2=comp_dgt(f,g,a,2*M,L); */
LTFAT_NAME_COMPLEX(dgt_fb)(f, g, L, gl, W, M, 2*M, FREQINV, coef2);
const ltfatInt nyquestadd = (M%2)*M2;
LTFAT_COMPLEX *pcoef = cout;
LTFAT_COMPLEX *pcoef2 = coef2;
POSTPROC_COMPLEX
ltfat_free(coef2);
}
LTFAT_EXTERN void
LTFAT_NAME_REAL(dwilt_fb)(const LTFAT_REAL *f, const LTFAT_REAL *g,
const ltfatInt L, const ltfatInt gl,
const ltfatInt W, const ltfatInt M,
LTFAT_REAL *cout)
{
const ltfatInt N = L/M;
const ltfatInt coef2_ld = M + 1;
const ltfatInt nyquestadd = (M%2)*coef2_ld;
const LTFAT_REAL scalconst = (LTFAT_REAL) sqrt(2.0);
LTFAT_COMPLEX *coef2 = ltfat_malloc((M+1)*N*W*sizeof*coef2);
LTFAT_NAME(dgtreal_fb)(f, g, L, gl, W, M, 2*M, FREQINV, coef2);
LTFAT_REAL* pcoef = cout;
LTFAT_COMPLEX* pcoef2 = coef2;
POSTPROC_REAL
ltfat_free(coef2);
}
#undef CH
#undef POSTPROC_REAL
#undef POSTPROC_COMPLEX
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