nrot / RustySpectrum

RustySpectrum

A simple app for draws spectrum on image. Each pixel on image is FFT value . Each row is FFT set. On default: swaps FFT part to move zero frequency to center (see freq-centered).

Support only cf32 input format and png output format.

spectrum_analyzer file.cf32 -n -f 128 --sample-limit 16000 --fft-clip-max 30

spectrum_analyzer file.cf32 -n -f 128 --sample-limit 16000 --fft-clip-max 30 -c gray-smooth

Usage: spectrum_analyzer [OPTIONS] <SOURCE>

Arguments:
  <SOURCE>  Source cf32 file

Options:
  -o, --output <OUTPUT>
          Output png file path [default: spectrum.png]
  -f, --fft-size <FFT_SIZE>
          FFT size [default: 1024]
  -v, --verbose...
          More output per occurrence
  -q, --quiet...
          Less output per occurrence
  -c, --colors <COLORS>
          Color scheme function [default: rgb-smooth] [possible values: rgb-smooth, gray-smooth]
      --fft-clamp-min <FFT_CLAMP_MIN>
          Value for added to each complex number [default: 0.0]
      --fft-clamp-max <FFT_CLAMP_MAX>
          Value for color function. Example: Gray color scheme black==0.0, white==max value [default: 1.0]
  -s, --smart-fft-clamp
          Searched min and max value for all complex data. Use 'display function' for searching
  -n, --normalize-fft
          Normalize fft. Each complex value divide fft-size
      --central-line
          Draws purple central line
      --freq-centered <FREQ_CENTERED>
          Default main freq moved to center. Original draws raw fft [default: moved-fft] [possible values: moved-fft, original]
      --byte-offset <BYTE_OFFSET>
          Offset bytes from beginning of file [default: 0]
      --display-func <DISPLAY_FUNC>
          Function for display each FFT complex value; For Custom must set custom-function [default: norm] [possible values: norm, real, image]
      --custom-function <CUSTOM_FUNCTION>
          Custom eval function for display function. Requered fn convert(re, im) {<THIS YOU CODE>}; Requered f64 output; Have some math functions
      --sample-limit <SAMPLE_LIMIT>
          Sample count limit [default: 0]
      --format <FORMAT>
          File format; Default fc32 [possible values: cf32, cf64, cs32, cs16, cs8, cu8, f32, f64, s16, s8, u8]
  -h, --help
          Print help
  -V, --version
          Print version

Build from source

  git clone https://github.com/nrot/RustySpectrum.git
  cd RustySpectrum
  cargo build --release