Hi all,
I have the following c++ code which gets fft by sliding on sample by sample
fo the input.
/*
* The private constructor
*/
sliding_fft_impl::sliding_fft_impl(uint fft_size)
: gr::sync_block("sliding_fft",
gr::io_signature::make(1, 1, sizeof(gr_complex)),
gr::io_signature::make(1, 1, fft_size * sizeof(gr_complex))),
d_fft_size(fft_size)
{
d_fft = new fft::fft_complex (d_fft_size, 1, 2);
set_history(fft_size);
}
sliding_fft_impl::~sliding_fft_impl()
{
delete d_fft;
}
int
sliding_fft_impl::work(int noutput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items)
{
const gr_complex *in = (const gr_complex *) input_items[0];
gr_complex *out = (gr_complex *) output_items[0];
memcpy(d_fft->get_inbuf(), in, d_fft_size * sizeof(gr_complex));
d_fft->execute();
memcpy(out, d_fft->get_outbuf(), d_fft_size * sizeof(gr_complex));
//delete d_fft;
return 1;
}
If I run the fft execution on 2 threads, or more, is there any "race"
problem between these 2 threads and the work one? Inj another words,
is it possible that this work being called before finishing the fft
execution?
If it is so, there will be a race problem because "work" wants to
write on d_fft->get_inbuf() while fft execution wants to read from it!
please help me with this code. I don't know why at the runtime, the
data I give at the output aren't desired after a while!!
Best,
Mostafa
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