Hello,
I am using GNU Radio version 3.6.5 and trying to write a block to calculate
average of 5 samples. I want to produce one average output corresponding to
5 input samples. I am using set_history(5) to remember previous data. I
used gr_modtool script of type decimator to create file.
eg. for Vector source {1,2,3,4,5,6,7,8,9,10}, it should generate average
{3,8}. Instead I am getting {.2, .6}.
My requirement is to produce output, it should take 5 inputs. Please
suggest me where I need to do modification.
In function gr_sync_decimator("average",
gr_make_io_signature(1, 1, sizeof(float)),
gr_make_io_signature(1, 1, sizeof(float)), 5)
what role value 5 will play?
Below is code snapshot.
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gr_io_signature.h>
#include "average_impl.h"
namespace gr {
namespace howto {
average::sptr
average::make()
{
return gnuradio::get_initial_sptr
(new average_impl());
}
/*
* The private constructor
*/
average_impl::average_impl()
: gr_sync_decimator("average",
gr_make_io_signature(1, 1, sizeof(float)),
gr_make_io_signature(1, 1, sizeof(float)), 5)
{
set_history(5);
}
/*
* Our virtual destructor.
*/
average_impl::~average_impl()
{
}
int
average_impl::work(int noutput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items)
{
const float *in = (const float *) input_items[0];
float *out = (float *) output_items[0];
in +=4;
for(int i=0; i<noutput_items; i++){
out[i]=(in[i]+in[i-1]+in[i-2]+in[i-3]+in[i-4])/5;
}
return noutput_items;
}
} /* namespace howto */
} /* namespace gr */
Thanks and regards,
Kunal Sankhe
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