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91 lines
2.4 KiB
C++
91 lines
2.4 KiB
C++
/* emph.h
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This file is part of a program that implements a Software-Defined Radio.
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Copyright (C) 2014, 2016, 2023 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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/********************************************************************************************************
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* *
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* Overlap-Save FM Pre-Emphasis *
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* *
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********************************************************************************************************/
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#ifndef _emph_h
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#define _emph_h
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#include <vector>
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#include "fftw3.h"
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#include "export.h"
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namespace WDSP {
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class WDSP_API EMPH
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{
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public:
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int run;
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int position;
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int size;
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float* in;
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float* out;
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int ctype;
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double f_low;
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double f_high;
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std::vector<float> infilt;
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std::vector<float> product;
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std::vector<float> mults;
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double rate;
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fftwf_plan CFor;
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fftwf_plan CRev;
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EMPH(
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int run,
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int position,
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int size,
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float* in,
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float* out,
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int rate,
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int ctype,
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double f_low,
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double f_high
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);
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EMPH(const EMPH&) = delete;
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EMPH& operator=(const EMPH& other) = delete;
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~EMPH();
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void flush();
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void execute(int position);
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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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private:
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void calc();
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void decalc();
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};
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} // namespace WDSP
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#endif
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