From 7bee8dfbe234c8caf0c1033ebd71040355fcb838 Mon Sep 17 00:00:00 2001
From: Tom Rondeau <trondeau@vt.edu>
Date: Sun, 6 Jan 2013 18:49:07 -0500
Subject: vocoder: converting to private impl format.
---
gr-vocoder/lib/cvsd_encode_sb_impl.h | 92 ++++++++++++++++++++++++++++++++++++
1 file changed, 92 insertions(+)
create mode 100644 gr-vocoder/lib/cvsd_encode_sb_impl.h
(limited to 'gr-vocoder/lib/cvsd_encode_sb_impl.h')
diff --git a/gr-vocoder/lib/cvsd_encode_sb_impl.h b/gr-vocoder/lib/cvsd_encode_sb_impl.h
new file mode 100644
index 0000000000..1189920fa0
--- /dev/null
+++ b/gr-vocoder/lib/cvsd_encode_sb_impl.h
@@ -0,0 +1,92 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2007,2013 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_VOCODER_CVSD_ENCODER_SB_IMPL_H
+#define INCLUDED_VOCODER_CVSD_ENCODER_SB_IMPL_H
+
+#include <vocoder/cvsd_encode_sb.h>
+
+namespace gr {
+ namespace vocoder {
+
+ class cvsd_encode_sb_impl : public cvsd_encode_sb
+ {
+ private:
+ //! Member functions required by the encoder/decoder
+ //! \brief Rounding function specific to CVSD
+ //! \return the input value rounded to the nearest integer
+ int cvsd_round(double input);
+
+ //! \brief A power function specific to CVSD data formats
+ //! \return (radix)^power, where radix and power are short integers
+ unsigned int cvsd_pow(short radix, short power);
+
+ //! \brief Sums number of 1's in the input
+ //! \return the number of 1s in the four bytes of an input unsigned integer
+ unsigned char cvsd_bitwise_sum(unsigned int input);
+
+ // Members variables related to the CVSD encoder use to update interal reference value
+ short d_min_step;
+ short d_max_step;
+ double d_step_decay;
+ double d_accum_decay;
+
+ int d_K; //!< \brief Size of shift register; the number of output bits remembered in shift register
+ int d_J; //!< \brief Number of bits in the shift register that are equal; size of run of 1s, 0s
+
+ short d_pos_accum_max;
+ short d_neg_accum_max;
+
+ int d_accum; //!< \brief Current value of internal reference
+ int d_loop_counter; //!< \brief Current value of the loop counter
+ unsigned int d_runner; //!< \brief Current value of the shift register
+ short d_stepsize; //!< \brief Current value of the step sizer
+
+ public:
+ cvsd_encode_sb_impl(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);
+ ~cvsd_encode_sb_impl();
+
+ 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);
+ };
+
+ } /* namespace vocoder */
+} /* namespace gr */
+
+#endif /* INCLUDED_VOCODER_CVSD_ENCODE_SB_IMPL_H */
--
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