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/* -*- c++ -*- */
/*
* Copyright 2004,2007,2010 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* SPDX-License-Identifier: GPL-3.0-or-later
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "mmse_interpolator_ff_impl.h"
#include <gnuradio/io_signature.h>
#include <stdexcept>
namespace gr {
namespace filter {
mmse_interpolator_ff::sptr mmse_interpolator_ff::make(float phase_shift,
float interp_ratio)
{
return gnuradio::make_block_sptr<mmse_interpolator_ff_impl>(phase_shift,
interp_ratio);
}
mmse_interpolator_ff_impl::mmse_interpolator_ff_impl(float phase_shift,
float interp_ratio)
: block("mmse_interpolator_ff",
io_signature::make(1, 1, sizeof(float)),
io_signature::make(1, 1, sizeof(float))),
d_mu(phase_shift),
d_mu_inc(interp_ratio)
{
GR_LOG_WARN(d_logger,
"mmse_interpolator is deprecated. Please use mmse_resampler instead.");
if (interp_ratio <= 0)
throw std::out_of_range("interpolation ratio must be > 0");
if (phase_shift < 0 || phase_shift > 1)
throw std::out_of_range("phase shift ratio must be > 0 and < 1");
set_inverse_relative_rate(d_mu_inc);
}
void mmse_interpolator_ff_impl::forecast(int noutput_items,
gr_vector_int& ninput_items_required)
{
unsigned ninputs = ninput_items_required.size();
for (unsigned i = 0; i < ninputs; i++) {
ninput_items_required[i] =
(int)ceil((noutput_items * d_mu_inc) + d_interp.ntaps());
}
}
int mmse_interpolator_ff_impl::general_work(int noutput_items,
gr_vector_int& ninput_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];
int ii = 0; // input index
int oo = 0; // output index
while (oo < noutput_items) {
out[oo++] = d_interp.interpolate(&in[ii], static_cast<float>(d_mu));
double s = d_mu + d_mu_inc;
double f = floor(s);
int incr = (int)f;
d_mu = s - f;
ii += incr;
}
consume_each(ii);
return noutput_items;
}
float mmse_interpolator_ff_impl::mu() const { return static_cast<float>(d_mu); }
float mmse_interpolator_ff_impl::interp_ratio() const
{
return static_cast<float>(d_mu_inc);
}
void mmse_interpolator_ff_impl::set_mu(float mu) { d_mu = static_cast<double>(mu); }
void mmse_interpolator_ff_impl::set_interp_ratio(float interp_ratio)
{
d_mu_inc = static_cast<double>(interp_ratio);
}
} /* namespace filter */
} /* namespace gr */
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