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112 lines
4.1 KiB
C++
112 lines
4.1 KiB
C++
/* amd.h
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This file is part of a program that implements a Software-Defined Radio.
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Copyright (C) 2012, 2013 Warren Pratt, NR0V
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Copyright (C) 2024 Edouard Griffiths, F4EXB Adapted to SDRangel
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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The author can be reached by email at
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warren@wpratt.com
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*/
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#ifndef wdsp_amd_hpp
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#define wdsp_amd_hpp
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#include <array>
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#include "export.h"
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namespace WDSP {
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class WDSP_API AMD {
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public:
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int run;
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int buff_size; // buffer size
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float *in_buff; // pointer to input buffer
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float *out_buff; // pointer to output buffer
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int mode; // demodulation mode
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double sample_rate; // sample rate
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double dc; // dc component in demodulated output
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double fmin; // pll - minimum carrier freq to lock
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double fmax; // pll - maximum carrier freq to lock
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double omega_min; // pll - minimum lock check parameter
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double omega_max; // pll - maximum lock check parameter
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double zeta; // pll - damping factor; as coded, must be <=1.0
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double omegaN; // pll - natural frequency
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double phs; // pll - phase accumulator
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double omega; // pll - locked pll frequency
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double fil_out; // pll - filter output
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double g1; // pll - filter gain parameters
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double g2; // pll - filter gain parameters
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double tauR; // carrier removal time constant
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double tauI; // carrier insertion time constant
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double mtauR; // carrier removal multiplier
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double onem_mtauR; // 1.0 - carrier_removal_multiplier
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double mtauI; // carrier insertion multiplier
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double onem_mtauI; // 1.0 - carrier_insertion_multiplier
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static const int STAGES = 7;
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static const int OUT_IDX = 3 * STAGES;
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std::array<double, 3*STAGES + 3> a; // Filter a variables
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std::array<double, 3*STAGES + 3> b; // Filter b variables
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std::array<double, 3*STAGES + 3> c; // Filter c variables
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std::array<double, 3*STAGES + 3> d; // Filter d variables
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std::array<double, STAGES> c0; // Filter coefficients - path 0
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std::array<double, STAGES> c1; // Filter coefficients - path 1
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double dsI; // delayed sample, I path
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double dsQ; // delayed sample, Q path
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double dc_insert; // dc component to insert in output
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int sbmode; // sideband mode
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int levelfade; // Fade Leveler switch
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AMD
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(
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int run,
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int buff_size,
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float *in_buff,
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float *out_buff,
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int mode,
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int levelfade,
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int sbmode,
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int sample_rate,
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double fmin,
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double fmax,
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double zeta,
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double omegaN,
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double tauR,
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double tauI
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);
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AMD(const AMD&) = delete;
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AMD& operator=(const AMD& other) = delete;
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~AMD() = default;
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void init();
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void flush();
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void execute();
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void setBuffers(float* in, float* out);
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void setSamplerate(int rate);
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void setSize(int size);
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// Public Properties
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void setSBMode(int sbmode);
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void setFadeLevel(int levelfade);
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};
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} // namespace WDSP
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#endif
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