From 36c0ba64703776f4cc2a77adc00740b05e0b055d Mon Sep 17 00:00:00 2001
From: trondeau <trondeau@221aa14e-8319-0410-a670-987f0aec2ac5>
Date: Sat, 7 Apr 2007 01:31:18 +0000
Subject: merged developer branch trondeau/cvsd -r4801:4904 to add CVSD vocoder
and example code
git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@4906 221aa14e-8319-0410-a670-987f0aec2ac5
---
gr-cvsd-vocoder/src/lib/cvsd_encode_sb.h | 96 ++++++++++++++++++++++++++++++++
1 file changed, 96 insertions(+)
create mode 100644 gr-cvsd-vocoder/src/lib/cvsd_encode_sb.h
(limited to 'gr-cvsd-vocoder/src/lib/cvsd_encode_sb.h')
diff --git a/gr-cvsd-vocoder/src/lib/cvsd_encode_sb.h b/gr-cvsd-vocoder/src/lib/cvsd_encode_sb.h
new file mode 100644
index 0000000000..57734ca15a
--- /dev/null
+++ b/gr-cvsd-vocoder/src/lib/cvsd_encode_sb.h
@@ -0,0 +1,96 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2007 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 2, 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_CVSD_ENCODER_SB_H
+#define INCLUDED_CVSD_ENCODER_SB_H
+
+#include <gr_sync_decimator.h>
+
+class cvsd_encode_sb;
+
+typedef boost::shared_ptr<cvsd_encode_sb> cvsd_encode_sb_sptr;
+
+cvsd_encode_sb_sptr cvsd_make_encode_sb (short min_step=10,
+ short max_step=1280,
+ double step_decay=0.9990234375,
+ double accum_decay= 0.96875,
+ int K=32,
+ int J=4,
+ short pos_accum_max=32767,
+ short neg_accum_max=-32767);
+
+class cvsd_encode_sb : public gr_sync_decimator
+{
+private:
+ friend cvsd_encode_sb_sptr cvsd_make_encode_sb (short min_step,
+ short max_step,
+ double step_decay,
+ double accum_decay,
+ int K,
+ int J,
+ short pos_accum_max,
+ short neg_accum_max);
+
+ cvsd_encode_sb (short min_step, short max_step, double step_decay,
+ double accum_decay, int K, int J,
+ short pos_accum_max, short neg_accum_max);
+
+ int cvsd_round(double input);
+ unsigned int cvsd_pow (short radix, short power);
+ unsigned char cvsd_bitwise_sum (unsigned int input);
+
+ short d_min_step;
+ short d_max_step;
+ double d_step_decay;
+ double d_accum_decay;
+
+ //! \brief Size of shift register; the number of output bits remembered in shift register
+ int d_K;
+
+ //! \brief Number of bits in the shift register that are equal; size of run of 1s, 0s
+ int d_J;
+
+ short d_pos_accum_max;
+ short d_neg_accum_max;
+
+ int d_accum;
+ int d_loop_counter;
+ unsigned int d_runner;
+ short d_stepsize;
+
+ public:
+ ~cvsd_encode_sb (); // public destructor
+
+ short min_step() { return d_min_step; }
+ short max_step() { return d_max_step; }
+ double step_decay() { return d_step_decay; }
+ double accum_decay() { return d_accum_decay; }
+ int K() { return d_K; }
+ int J() { return d_J; }
+ short pos_accum_max() { return d_pos_accum_max; }
+ short neg_accum_max() { return d_neg_accum_max; }
+
+ int work (int noutput_items,
+ gr_vector_const_void_star &input_items,
+ gr_vector_void_star &output_items);
+};
+
+#endif /* INCLUDED_CVSD_ENCODE_SB_H */
--
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