--- /dev/null
+/* -*- c++ -*- */
+/*
+ * Copyright 2009 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 <gr_pfb_interpolator_ccf.h>
+#include <gr_fir_ccf.h>
+#include <gr_fir_util.h>
+#include <gr_io_signature.h>
+#include <cstdio>
+
+gr_pfb_interpolator_ccf_sptr gr_make_pfb_interpolator_ccf (unsigned int interp,
+ const std::vector<float> &taps)
+{
+ return gr_pfb_interpolator_ccf_sptr (new gr_pfb_interpolator_ccf (interp, taps));
+}
+
+
+gr_pfb_interpolator_ccf::gr_pfb_interpolator_ccf (unsigned int interp,
+ const std::vector<float> &taps)
+ : gr_sync_interpolator ("pfb_interpolator_ccf",
+ gr_make_io_signature (1, 1, sizeof(gr_complex)),
+ gr_make_io_signature (1, 1, sizeof(gr_complex)),
+ interp),
+ d_updated (false)
+{
+ d_rate = interp;
+ d_filters = std::vector<gr_fir_ccf*>(d_rate);
+
+ // Create an FIR filter for each channel and zero out the taps
+ std::vector<float> vtaps(0, d_rate);
+ for(unsigned int i = 0; i < d_rate; i++) {
+ d_filters[i] = gr_fir_util::create_gr_fir_ccf(vtaps);
+ }
+
+ // Now, actually set the filters' taps
+ set_taps(taps);
+}
+
+gr_pfb_interpolator_ccf::~gr_pfb_interpolator_ccf ()
+{
+ for(unsigned int i = 0; i < d_rate; i++) {
+ delete d_filters[i];
+ }
+}
+
+void
+gr_pfb_interpolator_ccf::set_taps (const std::vector<float> &taps)
+{
+ unsigned int i,j;
+
+ unsigned int ntaps = taps.size();
+ d_taps_per_filter = (unsigned int)ceil((double)ntaps/(double)d_rate);
+
+ // Create d_numchan vectors to store each channel's taps
+ //std::vector< std::vector<float> > vtaps(d_rate);
+ d_taps.resize(d_rate);
+
+ // Make a vector of the taps plus fill it out with 0's to fill
+ // each polyphase filter with exactly d_taps_per_filter
+ std::vector<float> tmp_taps;
+ tmp_taps = taps;
+ while((float)(tmp_taps.size()) < d_rate*d_taps_per_filter) {
+ tmp_taps.push_back(0.0);
+ }
+
+ // Partition the filter
+ for(i = 0; i < d_rate; i++) {
+ // Each channel uses all d_taps_per_filter with 0's if not enough taps to fill out
+ d_taps[i] = std::vector<float>(d_taps_per_filter, 0);
+ for(j = 0; j < d_taps_per_filter; j++) {
+ d_taps[i][j] = tmp_taps[i + j*d_rate]; // add taps to channels in reverse order
+ }
+
+ // Build a filter for each channel and add it's taps to it
+ d_filters[i]->set_taps(d_taps[i]);
+ }
+
+ // Set the history to ensure enough input items for each filter
+ set_history (d_taps_per_filter);
+
+ d_updated = true;
+}
+
+void
+gr_pfb_interpolator_ccf::print_taps()
+{
+ unsigned int i, j;
+ for(i = 0; i < d_rate; i++) {
+ printf("filter[%d]: [", i);
+ for(j = 0; j < d_taps_per_filter; j++) {
+ printf(" %.4e", d_taps[i][j]);
+ }
+ printf("]\n\n");
+ }
+}
+
+int
+gr_pfb_interpolator_ccf::work (int noutput_items,
+ gr_vector_const_void_star &input_items,
+ gr_vector_void_star &output_items)
+{
+ gr_complex *in = (gr_complex *) input_items[0];
+ gr_complex *out = (gr_complex *) output_items[0];
+
+ if (d_updated) {
+ d_updated = false;
+ return 0; // history requirements may have changed.
+ }
+
+ int i = 0, count = 0;
+
+ while(i < noutput_items) {
+ for(int j = 0; j < d_rate; j++) {
+ out[i] = d_filters[j]->filter(&in[count]);
+ i++;
+ }
+ count++;
+ }
+
+ return i;
+}