rtf_create_downsampler - Creates downsampling filter

rtf_create_downsampler()  creates a filter that downsamples signals coming from nch channels of type type
       (see rtf_create_filter(3)) by a decimation factor of r (i.e. the sampling frequency of the input will  be
       r  times the sampling frequency of the output). This is achieved internally by applying a lowpass 4-order
       Chebychev filter to the input data using a normalized cutoff frequency of 0.8/(2*r)  and  decimating  the
       result every r samples.

       rtf_create_downsampler - Creates downsampling filter

       On  the contrary of most other filters, the number of samples returned by rtf_filter(3) is different than
       the input (as expected) but also may vary at each call if the number of sample supplied in input is not a
       multiple of r.

       Returns the handle to the created filter in case of success, NULL otherwise.

rtf_filter(3), rtf_create_filter(3), rtf_destroy_filter(3)

EPFL                                                  2010                             RTF_CREATE_DOWNSAMPLER(3)

#include<rtfilter.h>hfilterrtf_create_downsampler(unsignedintnch,inttype,unsignedintr);