C programing

The goal is to realize a very simple signal processing software. It shouldn't take more than a few hours. The program will take an input signal, apply a Butterworth filter, and save the output. Il will provide : - the function to calculate the butterworth factors, - a program to generate noisy test signals The program will allow the user to : – specify the name of the file to be read – specify the name of the file for the output signal – specify the name of the file where the filter characteristics will be stored – specify filter's characteristics : cut off frequency, filter order – view the input with Gnuplot – apply the filter and store the result – view the output with Gnuplot - save graphs in eps format - continue running the program unless the user choose to quit - signals will be stored in files in 2 columns : time, value, with the sampling the program must run with smoothly with Linux. I want the sources, with a makefile. It will use memory allocation, custom data structures, and will be as short as possible. Text-base interface is fine. This should be a fairly easy gig for an experienced programmer. The only difficulty is the delay : I need it for the 04/08 (8th of april), 17h00 GMT. If you can't do it for this time, please do not bid.