1 files changed, 12 insertions, 5 deletions
diff --git a/common/alcomplex.h b/common/alcomplex.h
index 23b8114a..46dbb5bc 100644
--- a/common/alcomplex.h
+++ b/common/alcomplex.h
@@ -2,6 +2,7 @@
 #define ALCOMPLEX_H
 
 #include <complex>
+#include <type_traits>
 
 #include "alspan.h"
 
@@ -10,21 +11,27 @@
  * FFT and 1 is inverse FFT. Applies the Discrete Fourier Transform (DFT) to
  * the data supplied in the buffer, which MUST BE power of two.
  */
-void complex_fft(const al::span<std::complex<double>> buffer, const double sign);
+template<typename Real>
+std::enable_if_t<std::is_floating_point<Real>::value>
+complex_fft(const al::span<std::complex<Real>> buffer, const Real sign);
 
 /**
  * Calculate the frequency-domain response of the time-domain signal in the
  * provided buffer, which MUST BE power of two.
  */
-inline void forward_fft(const al::span<std::complex<double>> buffer)
-{ complex_fft(buffer, -1.0); }
+template<typename Real>
+std::enable_if_t<std::is_floating_point<Real>::value>
+forward_fft(const al::span<std::complex<Real>> buffer)
+{ complex_fft(buffer, Real{-1}); }
 
 /**
  * Calculate the time-domain signal of the frequency-domain response in the
  * provided buffer, which MUST BE power of two.
  */
-inline void inverse_fft(const al::span<std::complex<double>> buffer)
-{ complex_fft(buffer, 1.0); }
+template<typename Real>
+std::enable_if_t<std::is_floating_point<Real>::value>
+inverse_fft(const al::span<std::complex<Real>> buffer)
+{ complex_fft(buffer, Real{1}); }
 
 /**
  * Calculate the complex helical sequence (discrete-time analytical signal) of