diff options
| author | Tom Rondeau <trondeau@vt.edu> | 2013-01-06 18:49:07 -0500 |
|---|---|---|
| committer | Tom Rondeau <trondeau@vt.edu> | 2013-01-06 21:54:13 -0500 |
| commit | 7bee8dfbe234c8caf0c1033ebd71040355fcb838 (patch) | |
| tree | 7f1a477681fc1e7dd37567b4c19c307e44cf89e0 /gr-vocoder/lib/cvsd_decode_bs_impl.h | |
| parent | 9293a3863ae6fb1287e42185e4a7d8073375b65b (diff) | |
vocoder: converting to private impl format.
Diffstat (limited to 'gr-vocoder/lib/cvsd_decode_bs_impl.h')
| -rw-r--r-- | gr-vocoder/lib/cvsd_decode_bs_impl.h | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/gr-vocoder/lib/cvsd_decode_bs_impl.h b/gr-vocoder/lib/cvsd_decode_bs_impl.h new file mode 100644 index 0000000000..007c00c2bd --- /dev/null +++ b/gr-vocoder/lib/cvsd_decode_bs_impl.h @@ -0,0 +1,92 @@ +/* -*- c++ -*- */ +/* + * Copyright 2007,2011,2013 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_DECODE_BS_IMPL_H +#define INCLUDED_VOCODER_CVSD_DECODE_BS_IMPL_H + +#include <vocoder/cvsd_decode_bs.h> + +namespace gr { + namespace vocoder { + + class cvsd_decode_bs_impl : public cvsd_decode_bs + { + 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); + + 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 + unsigned int d_runner_mask; //!< \brief Value of the mask to access the last J bits of the shift register + short d_stepsize; //!< \brief Current value of the step sizer + + public: + cvsd_decode_bs_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_decode_bs_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_DECODE_BS_IMPL_H */ |