diff options
Diffstat (limited to 'common/alcomplex.cpp')
| -rw-r--r-- | common/alcomplex.cpp | 12 |
1 files changed, 4 insertions, 8 deletions
diff --git a/common/alcomplex.cpp b/common/alcomplex.cpp index e5cbe8a0..0af9fc98 100644 --- a/common/alcomplex.cpp +++ b/common/alcomplex.cpp @@ -18,12 +18,8 @@ void complex_fft(const al::span<std::complex<double>> buffer, const double sign) for(size_t i{1u};i < fftsize-1;i++) { size_t j{0u}; - for(size_t mask{1u};mask < fftsize;mask <<= 1) - { - if((i&mask) != 0) - j++; - j <<= 1; - } + for(size_t imask{i + fftsize};imask;imask >>= 1) + j = (j<<1) + (imask&1); j >>= 1; if(i < j) @@ -35,9 +31,9 @@ void complex_fft(const al::span<std::complex<double>> buffer, const double sign) for(size_t i{1u};i < fftsize;i<<=1, step<<=1) { const size_t step2{step >> 1}; - double arg{al::MathDefs<double>::Pi() / static_cast<double>(step2)}; + const double arg{al::MathDefs<double>::Pi() / static_cast<double>(step2)}; - std::complex<double> w{std::cos(arg), std::sin(arg)*sign}; + const std::complex<double> w{std::cos(arg), std::sin(arg)*sign}; std::complex<double> u{1.0, 0.0}; for(size_t j{0};j < step2;j++) { |