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diff --git a/gr-analog/lib/phase_modulator_fc_impl.cc b/gr-analog/lib/phase_modulator_fc_impl.cc
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+/* -*- c++ -*- */
+/*
+ * Copyright 2005,2006,2010,2012 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 "phase_modulator_fc_impl.h"
+#include <gr_io_signature.h>
+#include <gr_sincos.h>
+#include <math.h>
+
+namespace gr {
+ namespace analog {
+
+ phase_modulator_fc::sptr
+ phase_modulator_fc::make(double sensitivity)
+ {
+ return gnuradio::get_initial_sptr
+ (new phase_modulator_fc_impl(sensitivity));
+ }
+
+ phase_modulator_fc_impl::phase_modulator_fc_impl(double sensitivity)
+ : gr_sync_block("phase_modulator_fc",
+ gr_make_io_signature(1, 1, sizeof(float)),
+ gr_make_io_signature(1, 1, sizeof(gr_complex))),
+ d_sensitivity(sensitivity), d_phase(0)
+ {
+ }
+
+ phase_modulator_fc_impl::~phase_modulator_fc_impl()
+ {
+ }
+
+ int
+ phase_modulator_fc_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];
+ gr_complex *out = (gr_complex*)output_items[0];
+
+ for(int i = 0; i < noutput_items; i++) {
+ d_phase = d_sensitivity * in[i];
+ float oi, oq;
+ gr_sincosf(d_phase, &oq, &oi);
+ out[i] = gr_complex(oi, oq);
+ }
+
+ return noutput_items;
+ }
+
+ } /* namespace analog */
+} /* namespace gr */