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found out about little-documented FFTW_PRESERVE_INPUT which has effect on c2r transforms

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This commit is contained in:
Mark Borgerding
2010-02-16 20:44:48 -05:00
parent 1d342e135c
commit 8f51a4ac90
5 changed files with 208 additions and 100 deletions
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60
unsupported/Eigen/src/FFT/ei_fftw_impl.h
View File

@@ -71,34 +71,34 @@
inline
void fwd(complex_type * dst,complex_type * src,int nfft) {
if (m_plan==NULL) m_plan = fftwf_plan_dft_1d(nfft,src,dst, FFTW_FORWARD, FFTW_ESTIMATE);
if (m_plan==NULL) m_plan = fftwf_plan_dft_1d(nfft,src,dst, FFTW_FORWARD, FFTW_ESTIMATE|FFTW_PRESERVE_INPUT);
fftwf_execute_dft( m_plan, src,dst);
}
inline
void inv(complex_type * dst,complex_type * src,int nfft) {
if (m_plan==NULL) m_plan = fftwf_plan_dft_1d(nfft,src,dst, FFTW_BACKWARD , FFTW_ESTIMATE);
if (m_plan==NULL) m_plan = fftwf_plan_dft_1d(nfft,src,dst, FFTW_BACKWARD , FFTW_ESTIMATE|FFTW_PRESERVE_INPUT);
fftwf_execute_dft( m_plan, src,dst);
}
inline
void fwd(complex_type * dst,scalar_type * src,int nfft) {
if (m_plan==NULL) m_plan = fftwf_plan_dft_r2c_1d(nfft,src,dst,FFTW_ESTIMATE);
if (m_plan==NULL) m_plan = fftwf_plan_dft_r2c_1d(nfft,src,dst,FFTW_ESTIMATE|FFTW_PRESERVE_INPUT);
fftwf_execute_dft_r2c( m_plan,src,dst);
}
inline
void inv(scalar_type * dst,complex_type * src,int nfft) {
if (m_plan==NULL)
m_plan = fftwf_plan_dft_c2r_1d(nfft,src,dst,FFTW_ESTIMATE);
m_plan = fftwf_plan_dft_c2r_1d(nfft,src,dst,FFTW_ESTIMATE|FFTW_PRESERVE_INPUT);
fftwf_execute_dft_c2r( m_plan, src,dst);
}
inline
void fwd2( complex_type * dst,complex_type * src,int nrows,int ncols) {
if (m_plan==NULL) m_plan = fftwf_plan_dft_2d(ncols,nrows,src,dst,FFTW_FORWARD,FFTW_ESTIMATE);
void fwd2( complex_type * dst,complex_type * src,int n0,int n1) {
if (m_plan==NULL) m_plan = fftwf_plan_dft_2d(n0,n1,src,dst,FFTW_FORWARD,FFTW_ESTIMATE|FFTW_PRESERVE_INPUT);
fftwf_execute_dft( m_plan, src,dst);
}
inline
void inv2( complex_type * dst,complex_type * src,int nrows,int ncols) {
if (m_plan==NULL) m_plan = fftwf_plan_dft_2d(ncols,nrows,src,dst,FFTW_BACKWARD,FFTW_ESTIMATE);
void inv2( complex_type * dst,complex_type * src,int n0,int n1) {
if (m_plan==NULL) m_plan = fftwf_plan_dft_2d(n0,n1,src,dst,FFTW_BACKWARD,FFTW_ESTIMATE|FFTW_PRESERVE_INPUT);
fftwf_execute_dft( m_plan, src,dst);
}
@@ -114,33 +114,33 @@
inline
void fwd(complex_type * dst,complex_type * src,int nfft) {
if (m_plan==NULL) m_plan = fftw_plan_dft_1d(nfft,src,dst, FFTW_FORWARD, FFTW_ESTIMATE);
if (m_plan==NULL) m_plan = fftw_plan_dft_1d(nfft,src,dst, FFTW_FORWARD, FFTW_ESTIMATE|FFTW_PRESERVE_INPUT);
fftw_execute_dft( m_plan, src,dst);
}
inline
void inv(complex_type * dst,complex_type * src,int nfft) {
if (m_plan==NULL) m_plan = fftw_plan_dft_1d(nfft,src,dst, FFTW_BACKWARD , FFTW_ESTIMATE);
if (m_plan==NULL) m_plan = fftw_plan_dft_1d(nfft,src,dst, FFTW_BACKWARD , FFTW_ESTIMATE|FFTW_PRESERVE_INPUT);
fftw_execute_dft( m_plan, src,dst);
}
inline
void fwd(complex_type * dst,scalar_type * src,int nfft) {
if (m_plan==NULL) m_plan = fftw_plan_dft_r2c_1d(nfft,src,dst,FFTW_ESTIMATE);
if (m_plan==NULL) m_plan = fftw_plan_dft_r2c_1d(nfft,src,dst,FFTW_ESTIMATE|FFTW_PRESERVE_INPUT);
fftw_execute_dft_r2c( m_plan,src,dst);
}
inline
void inv(scalar_type * dst,complex_type * src,int nfft) {
if (m_plan==NULL)
m_plan = fftw_plan_dft_c2r_1d(nfft,src,dst,FFTW_ESTIMATE);
m_plan = fftw_plan_dft_c2r_1d(nfft,src,dst,FFTW_ESTIMATE|FFTW_PRESERVE_INPUT);
fftw_execute_dft_c2r( m_plan, src,dst);
}
inline
void fwd2( complex_type * dst,complex_type * src,int nrows,int ncols) {
if (m_plan==NULL) m_plan = fftw_plan_dft_2d(ncols,nrows,src,dst,FFTW_FORWARD,FFTW_ESTIMATE);
void fwd2( complex_type * dst,complex_type * src,int n0,int n1) {
if (m_plan==NULL) m_plan = fftw_plan_dft_2d(n0,n1,src,dst,FFTW_FORWARD,FFTW_ESTIMATE|FFTW_PRESERVE_INPUT);
fftw_execute_dft( m_plan, src,dst);
}
inline
void inv2( complex_type * dst,complex_type * src,int nrows,int ncols) {
if (m_plan==NULL) m_plan = fftw_plan_dft_2d(ncols,nrows,src,dst,FFTW_BACKWARD,FFTW_ESTIMATE);
void inv2( complex_type * dst,complex_type * src,int n0,int n1) {
if (m_plan==NULL) m_plan = fftw_plan_dft_2d(n0,n1,src,dst,FFTW_BACKWARD,FFTW_ESTIMATE|FFTW_PRESERVE_INPUT);
fftw_execute_dft( m_plan, src,dst);
}
};
@@ -155,33 +155,33 @@
inline
void fwd(complex_type * dst,complex_type * src,int nfft) {
if (m_plan==NULL) m_plan = fftwl_plan_dft_1d(nfft,src,dst, FFTW_FORWARD, FFTW_ESTIMATE);
if (m_plan==NULL) m_plan = fftwl_plan_dft_1d(nfft,src,dst, FFTW_FORWARD, FFTW_ESTIMATE|FFTW_PRESERVE_INPUT);
fftwl_execute_dft( m_plan, src,dst);
}
inline
void inv(complex_type * dst,complex_type * src,int nfft) {
if (m_plan==NULL) m_plan = fftwl_plan_dft_1d(nfft,src,dst, FFTW_BACKWARD , FFTW_ESTIMATE);
if (m_plan==NULL) m_plan = fftwl_plan_dft_1d(nfft,src,dst, FFTW_BACKWARD , FFTW_ESTIMATE|FFTW_PRESERVE_INPUT);
fftwl_execute_dft( m_plan, src,dst);
}
inline
void fwd(complex_type * dst,scalar_type * src,int nfft) {
if (m_plan==NULL) m_plan = fftwl_plan_dft_r2c_1d(nfft,src,dst,FFTW_ESTIMATE);
if (m_plan==NULL) m_plan = fftwl_plan_dft_r2c_1d(nfft,src,dst,FFTW_ESTIMATE|FFTW_PRESERVE_INPUT);
fftwl_execute_dft_r2c( m_plan,src,dst);
}
inline
void inv(scalar_type * dst,complex_type * src,int nfft) {
if (m_plan==NULL)
m_plan = fftwl_plan_dft_c2r_1d(nfft,src,dst,FFTW_ESTIMATE);
m_plan = fftwl_plan_dft_c2r_1d(nfft,src,dst,FFTW_ESTIMATE|FFTW_PRESERVE_INPUT);
fftwl_execute_dft_c2r( m_plan, src,dst);
}
inline
void fwd2( complex_type * dst,complex_type * src,int nrows,int ncols) {
if (m_plan==NULL) m_plan = fftwl_plan_dft_2d(ncols,nrows,src,dst,FFTW_FORWARD,FFTW_ESTIMATE);
void fwd2( complex_type * dst,complex_type * src,int n0,int n1) {
if (m_plan==NULL) m_plan = fftwl_plan_dft_2d(n0,n1,src,dst,FFTW_FORWARD,FFTW_ESTIMATE|FFTW_PRESERVE_INPUT);
fftwl_execute_dft( m_plan, src,dst);
}
inline
void inv2( complex_type * dst,complex_type * src,int nrows,int ncols) {
if (m_plan==NULL) m_plan = fftwl_plan_dft_2d(ncols,nrows,src,dst,FFTW_BACKWARD,FFTW_ESTIMATE);
void inv2( complex_type * dst,complex_type * src,int n0,int n1) {
if (m_plan==NULL) m_plan = fftwl_plan_dft_2d(n0,n1,src,dst,FFTW_BACKWARD,FFTW_ESTIMATE|FFTW_PRESERVE_INPUT);
fftwl_execute_dft( m_plan, src,dst);
}
};
@@ -214,9 +214,9 @@
// 2-d complex-to-complex
inline
void fwd2(Complex * dst, const Complex * src, int nrows,int ncols)
void fwd2(Complex * dst, const Complex * src, int n0,int n1)
{
get_plan(nrows,ncols,false,dst,src).fwd2(ei_fftw_cast(dst), ei_fftw_cast(src) ,nrows,ncols);
get_plan(n0,n1,false,dst,src).fwd2(ei_fftw_cast(dst), ei_fftw_cast(src) ,n0,n1);
}
// inverse complex-to-complex
@@ -235,9 +235,9 @@
// 2-d complex-to-complex
inline
void inv2(Complex * dst, const Complex * src, int nrows,int ncols)
void inv2(Complex * dst, const Complex * src, int n0,int n1)
{
get_plan(nrows,ncols,true,dst,src).inv2(ei_fftw_cast(dst), ei_fftw_cast(src) ,nrows,ncols);
get_plan(n0,n1,true,dst,src).inv2(ei_fftw_cast(dst), ei_fftw_cast(src) ,n0,n1);
}
@@ -258,11 +258,11 @@
}
inline
PlanData & get_plan(int nrows,int ncols,bool inverse,void * dst,const void * src)
PlanData & get_plan(int n0,int n1,bool inverse,void * dst,const void * src)
{
bool inplace = (dst==src);
bool aligned = ( (reinterpret_cast<size_t>(src)&15) | (reinterpret_cast<size_t>(dst)&15) ) == 0;
int64_t key = ( ( (((int64_t)ncols) << 30)|(nrows<<3 ) | (inverse<<2) | (inplace<<1) | aligned ) << 1 ) + 1;
int64_t key = ( ( (((int64_t)n0) << 30)|(n1<<3 ) | (inverse<<2) | (inplace<<1) | aligned ) << 1 ) + 1;
return m_plans[key];
}
};

10
unsupported/Eigen/src/FFT/ei_kissfft_impl.h
View File

@@ -291,6 +291,16 @@ struct ei_kissfft_impl
get_plan(nfft,false).work(0, dst, src, 1,1);
}
inline
void fwd2( Complex * dst,const Complex *src,int n0,int n1)
{
}
inline
void inv2( Complex * dst,const Complex *src,int n0,int n1)
{
}
// real-to-complex forward FFT
// perform two FFTs of src even and src odd
// then twiddle to recombine them into the half-spectrum format