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added non-optimized real forward fft (no inverse yet)

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This commit is contained in:
Mark Borgerding
2009-05-22 22:37:59 -04:00
parent 68cad98bc9
commit 8b4afe3deb
3 changed files with 106 additions and 44 deletions
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10
unsupported/Eigen/src/FFT/simple_fft_traits.h
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@@ -34,7 +34,8 @@ namespace Eigen {
typedef std::complex<Scalar> Complex;
simple_fft_traits() : m_nfft(0) {}
void prepare(int nfft,bool inverse,Complex * dst,const Complex *src)
template <typename _Src>
void prepare(int nfft,bool inverse,Complex * dst,const _Src *src)
{
if (m_nfft == nfft) {
// reuse the twiddles, conjugate if necessary
@@ -73,7 +74,8 @@ namespace Eigen {
}while(n>1);
}
void exec(Complex * dst, const Complex * src)
template <typename _Src>
void exec(Complex * dst, const _Src * src)
{
work(0, dst, src, 1,1);
}
@@ -89,7 +91,9 @@ namespace Eigen {
private:
void work( int stage,Complex * Fout, const Complex * f, size_t fstride,size_t in_stride)
template <typename _Src>
void work( int stage,Complex * Fout, const _Src * f, size_t fstride,size_t in_stride)
{
int p = m_stageRadix[stage];
int m = m_stageRemainder[stage];