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71 lines
2.3 KiB
C++
71 lines
2.3 KiB
C++
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/* dbqlp.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, 2022, 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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* Double Bi-Quad Low-Pass *
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* *
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********************************************************************************************************/
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#ifndef wdsp_dbqlp_h
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#define wdsp_dbqlp_h
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#include "export.h"
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namespace WDSP {
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class WDSP_API DBQLP
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{
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public:
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int run;
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int size;
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float* in;
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float* out;
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double rate;
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double fc;
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double Q;
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double gain;
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int nstages;
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double a0, a1, a2, b1, b2;
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double* x0, * x1, * x2, * y0, * y1, * y2;
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static DBQLP* create_dbqlp(int run, int size, float* in, float* out, double rate, double fc, double Q, double gain, int nstages);
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static void destroy_dbqlp(DBQLP *a);
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static void flush_dbqlp(DBQLP *a);
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static void xdbqlp(DBQLP *a);
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static void setBuffers_dbqlp(DBQLP *a, float* in, float* out);
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static void setSamplerate_dbqlp(DBQLP *a, int rate);
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static void setSize_dbqlp(DBQLP *a, int size);
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private:
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static void calc_dbqlp(DBQLP *a);
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};
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} // namespace WDSP
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#endif
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