X-Git-Url: https://git.gag.com/?a=blobdiff_plain;f=gnuradio-core%2Fsrc%2Flib%2Ffilter%2Fgr_fractional_interpolator.cc;fp=gnuradio-core%2Fsrc%2Flib%2Ffilter%2Fgr_fractional_interpolator.cc;h=0000000000000000000000000000000000000000;hb=ea29b08aeb54227e6628f655ccfdb96fe4d8c378;hp=9166fcf7c9a94ae142062353fe76d000f926bfa3;hpb=09a1e803a9e6587c78d20cdf16891e5295874668;p=debian%2Fgnuradio diff --git a/gnuradio-core/src/lib/filter/gr_fractional_interpolator.cc b/gnuradio-core/src/lib/filter/gr_fractional_interpolator.cc deleted file mode 100644 index 9166fcf7..00000000 --- a/gnuradio-core/src/lib/filter/gr_fractional_interpolator.cc +++ /dev/null @@ -1,97 +0,0 @@ -/* -*- c++ -*- */ -/* - * Copyright 2004 Free Software Foundation, Inc. - * - * This file is part of GNU Radio - * - * GNU Radio is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 3, or (at your option) - * any later version. - * - * GNU Radio is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with GNU Radio; see the file COPYING. If not, write to - * the Free Software Foundation, Inc., 51 Franklin Street, - * Boston, MA 02110-1301, USA. - */ - -#ifdef HAVE_CONFIG_H -#include "config.h" -#endif - -#include -#include -#include -#include - -// Public constructor -gr_fractional_interpolator_sptr gr_make_fractional_interpolator(float phase_shift, float interp_ratio) -{ - return gr_fractional_interpolator_sptr(new gr_fractional_interpolator(phase_shift, interp_ratio)); -} - -gr_fractional_interpolator::gr_fractional_interpolator(float phase_shift, float interp_ratio) - : gr_block ("fractional_interpolator", - gr_make_io_signature (1, 1, sizeof (float)), - gr_make_io_signature (1, 1, sizeof (float))), - d_mu (phase_shift), d_mu_inc (interp_ratio), d_interp() -{ - 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_relative_rate (1.0 / interp_ratio); -} - -gr_fractional_interpolator::~gr_fractional_interpolator() -{ - delete d_interp; -} - -void -gr_fractional_interpolator::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 -gr_fractional_interpolator::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){ - - // produce output sample - - out[oo++] = d_interp->interpolate(&in[ii], d_mu); - - // printf( "%4d %9.6f\n", ii, 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; -}