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authorTim O'Shea <tim.oshea753@gmail.com>2013-05-23 08:43:14 -0400
committerTim O'Shea <tim.oshea753@gmail.com>2013-05-23 08:43:14 -0400
commit131bf62d8f06b8c9918be7c50a9f62601d107a27 (patch)
treeaba99492b7716be9db46ec80766e9e44b199c4bd /gr-analog/lib
parent419b761a1a6b3da3de1d9f15d5022aeab3ddf8b1 (diff)
analog: adding grc def for fastnoise source, adding agc3_cc
Diffstat (limited to 'gr-analog/lib')
-rw-r--r--gr-analog/lib/CMakeLists.txt1
-rw-r--r--gr-analog/lib/agc3_cc_impl.cc85
-rw-r--r--gr-analog/lib/agc3_cc_impl.h63
3 files changed, 149 insertions, 0 deletions
diff --git a/gr-analog/lib/CMakeLists.txt b/gr-analog/lib/CMakeLists.txt
index 5719eac7a5..506cf7efb1 100644
--- a/gr-analog/lib/CMakeLists.txt
+++ b/gr-analog/lib/CMakeLists.txt
@@ -120,6 +120,7 @@ list(APPEND analog_sources
agc_ff_impl.cc
agc2_cc_impl.cc
agc2_ff_impl.cc
+ agc3_cc_impl.cc
cpfsk_bc_impl.cc
ctcss_squelch_ff_impl.cc
dpll_bb_impl.cc
diff --git a/gr-analog/lib/agc3_cc_impl.cc b/gr-analog/lib/agc3_cc_impl.cc
new file mode 100644
index 0000000000..c99434d8a8
--- /dev/null
+++ b/gr-analog/lib/agc3_cc_impl.cc
@@ -0,0 +1,85 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 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 "agc3_cc_impl.h"
+#include <gr_io_signature.h>
+
+namespace gr {
+ namespace analog {
+
+ agc3_cc::sptr
+ agc3_cc::make(float attack_rate, float decay_rate, float reference)
+ {
+ return gnuradio::get_initial_sptr (new agc3_cc_impl(attack_rate, decay_rate, reference));
+ }
+
+ agc3_cc_impl::agc3_cc_impl(float attack_rate, float decay_rate, float reference)
+ : gr_sync_block("agc3_cc",
+ gr_make_io_signature(1, 1, sizeof(gr_complex)),
+ gr_make_io_signature(1, 1, sizeof(gr_complex))),
+ d_attack(attack_rate), d_decay(decay_rate),
+ d_reference(reference), d_gain(1.0),
+ d_reset(true)
+ {
+ }
+
+ agc3_cc_impl::~agc3_cc_impl()
+ {
+ }
+
+ int
+ agc3_cc_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];
+ // Compute a linear average on reset (no expected)
+ if(__builtin_expect (d_reset, false)){
+ float mag;
+ for(int i=0; i<noutput_items; i++){
+ mag += abs(in[i]);
+ }
+ d_gain = d_reference * (noutput_items/mag);
+ for(int i=0; i<noutput_items; i++){
+ out[i] = in[i] * d_gain;
+ }
+ d_reset = false;
+ printf("computed initial mean on %d values = %f\n", noutput_items, d_gain);
+ } else {
+ // Otherwise perform a normal iir update
+ for(int i=0; i<noutput_items; i++){
+ float newlevel = abs(in[i]);
+ float rate = (newlevel > d_reference/d_gain)?d_attack:d_decay;
+ d_gain = (d_gain*(1-rate)) + (d_reference/newlevel)*rate;
+ out[i] = in[i] * d_gain;
+ }
+ }
+ return noutput_items;
+ }
+
+ } /* namespace analog */
+} /* namespace gr */
diff --git a/gr-analog/lib/agc3_cc_impl.h b/gr-analog/lib/agc3_cc_impl.h
new file mode 100644
index 0000000000..0913243fd6
--- /dev/null
+++ b/gr-analog/lib/agc3_cc_impl.h
@@ -0,0 +1,63 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2006,2012 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.
+ */
+
+#ifndef INCLUDED_ANALOG_AGC3_IMPL_CC_H
+#define INCLUDED_ANALOG_AGC3_IMPL_CC_H
+
+#include <analog/agc3_cc.h>
+
+namespace gr {
+ namespace analog {
+
+ class agc3_cc_impl : public agc3_cc
+ {
+ public:
+ agc3_cc_impl(float attack_rate = 1e-1, float decay_rate = 1e-2,
+ float reference = 1.0);
+ ~agc3_cc_impl();
+
+ float attack_rate() const { return d_attack; }
+ float decay_rate() const { return d_decay; }
+ float reference() const { return d_reference; }
+ float gain() const { return d_gain; }
+
+ void set_attack_rate(float rate) { d_attack = rate; }
+ void set_decay_rate(float rate) { d_decay = rate; }
+ void set_reference(float reference) { d_reference = reference; }
+ void set_gain(float gain) { d_gain = gain; }
+
+ int work(int noutput_items,
+ gr_vector_const_void_star &input_items,
+ gr_vector_void_star &output_items);
+
+ private:
+ float d_attack;
+ float d_decay;
+ float d_reference;
+ float d_gain;
+ bool d_reset;
+ };
+
+ } /* namespace analog */
+} /* namespace gr */
+
+#endif /* INCLUDED_ANALOG_AGC3_CC_IMPL_H */
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