diff options
Diffstat (limited to 'gtk2_ardour/fft.cc')
| -rw-r--r-- | gtk2_ardour/fft.cc | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/gtk2_ardour/fft.cc b/gtk2_ardour/fft.cc index f78a1e94ad..d4841dd573 100644 --- a/gtk2_ardour/fft.cc +++ b/gtk2_ardour/fft.cc @@ -46,7 +46,7 @@ FFT::reset() { memset(_power_at_bin, 0, sizeof(float) * _data_size); memset(_phase_at_bin, 0, sizeof(float) * _data_size); - + _iterations = 0; } @@ -74,11 +74,11 @@ FFT::analyze(ARDOUR::Sample *input, WindowingType windowing_type) #define Re (_fftOutput[i]) #define Im (_fftOutput[_window_size-i]) - for (uint32_t i=1; i < _data_size - 1; i++) { + for (uint32_t i=1; i < _data_size - 1; i++) { power = (Re * Re) + (Im * Im); phase = atanf(Im / Re); - + if (Re < 0.0 && Im > 0.0) { phase += M_PI; } else if (Re < 0.0 && Im < 0.0) { @@ -96,7 +96,7 @@ void FFT::calculate() { if (_iterations > 1) { - for (uint32_t i=0; i < _data_size - 1; i++) { + for (uint32_t i=0; i < _data_size - 1; i++) { _power_at_bin[i] /= (float)_iterations; _phase_at_bin[i] /= (float)_iterations; } @@ -114,14 +114,14 @@ FFT::get_hann_window() _hann_window = (float *) malloc(sizeof(float) * _window_size); double sum = 0.0; - + for (uint32_t i=0; i < _window_size; i++) { _hann_window[i]=0.81f * ( 0.5f - (0.5f * (float) cos(2.0f * M_PI * (float)i / (float)(_window_size)))); sum += _hann_window[i]; } double isum = 1.0 / sum; - + for (uint32_t i=0; i < _window_size; i++) { _hann_window[i] *= isum; } |