changes for compilation with input_level

psrdada_cpp/effelsberg/edd/FftSpectrometer.cuh

@@ -28,8 +28,7 @@ public:
         std::size_t fft_length,
         std::size_t naccumulate,
         std::size_t nbits,
-        float scaling,
-        float offset,
+        float input_level,
         HandlerType& handler);
     ~FftSpectrometer();
 

psrdada_cpp/effelsberg/edd/detail/FftSpectrometer.cu

@@ -38,7 +38,7 @@ FftSpectrometer<HandlerType>::FftSpectrometer(
     int batch = nsamps_per_buffer/_fft_length;
     BOOST_LOG_TRIVIAL(debug) << "Calculating scales and offsets";
     float dof = 2 * _naccumulate;
-    float scale = (_input_level * np.sqrt(_nchans))**2;
+    float scale = std::pow(_input_level * std::sqrt(static_cast<float>(_nchans)), 2);
     float offset = scale * dof;
     float scaling = scale * std::sqrt(2 * dof);
     BOOST_LOG_TRIVIAL(debug) << "Generating FFT plan";

psrdada_cpp/effelsberg/edd/src/fft_spectrometer_cli.cu

@@ -63,9 +63,6 @@ int main(int argc, char** argv)
         ("input_level", po::value<float>(&input_level)->required(),
             "The input power level (standard deviation, used for 8-bit conversion)")
 
-        ("offset", po::value<float>(&offset)->required(),
-            "The power offset for data produced by the spectrometer (used for conversion back to 8-bit)")
-
         ("outfile,o", po::value<std::string>(&filename)
             ->default_value(filename),
             "The output file to write spectra to")