Dependencies

The following packages are required:

• libao-dev
• libfftw3-dev
• rtl-sdr

Build Instructions

 $ mkdir build && cd build
 $ cmake ..
 $ make

You can test the program using the included sample capture:

 $ xz -d < ../support/sample.xz | src/nrsc5 -r - 0

Building with Homebrew

 $ brew install --HEAD https://raw.githubusercontent.com/theori-io/nrsc5/master/nrsc5.rb

Usage

This was designed for use with an RTL-SDR dongle since that was our testing platform.

Options:

   frequency                       rtl-sdr center frequency
                                     (do not provide frequency when reading from file)
   program                         audio program to decode
                                     (0, 1, 2, or 3)
   -d device-index                 rtl-sdr device
   -g gain                         rtl-sdr gain (0.1 dB)
   -p ppm-error                    rtl-sdr ppm error
   -r samples-input                read samples from input file
   -w samples-output               write samples to output file
   -o audio-output                 write audio to output file
   -f adts|wav                     audio format: adts or wav
                                     (adts playback requires modified faad2)

Examples:

 $ nrsc5 -p 63 -g 490 -w samples1071 107100000 0

 $ nrsc5 -r samples1071 0