kopia lustrzana https://github.com/f4exb/sdrangel
126 wiersze
3.9 KiB
C++
126 wiersze
3.9 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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* Partitioned Overlap-Save FM Pre-Emphasis *
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* *
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********************************************************************************************************/
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#ifndef wdsp_emphp_h
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#define wdsp_emphp_h
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#include "export.h"
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namespace WDSP {
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class FIRCORE;
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class TXA;
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class WDSP_API EMPHP
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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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int nc;
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int mp;
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float* in;
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float* out;
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int ctype;
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float f_low;
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float f_high;
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float rate;
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FIRCORE *p;
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static EMPHP* create_emphp (int run, int position, int size, int nc, int mp,
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float* in, float* out, int rate, int ctype, float f_low, float f_high);
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static void destroy_emphp (EMPHP *a);
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static void flush_emphp (EMPHP *a);
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static void xemphp (EMPHP *a, int position);
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static void setBuffers_emphp (EMPHP *a, float* in, float* out);
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static void setSamplerate_emphp (EMPHP *a, int rate);
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static void setSize_emphp (EMPHP *a, int size);
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// TXA Properties
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static void SetFMEmphPosition (TXA& txa, int position);
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static void SetFMEmphMP (TXA& txa, int mp);
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static void SetFMEmphNC (TXA& txa, int nc);
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static void SetFMPreEmphFreqs(TXA& txa, float low, float high);
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};
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} // namespace WDSP
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#endif
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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 "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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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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float f_low;
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float f_high;
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float* infilt;
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float* product;
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float* mults;
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float rate;
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fftwf_plan CFor;
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fftwf_plan CRev;
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static EMPH* create_emph (int run, int position, int size, float* in, float* out, int rate, int ctype, float f_low, float f_high);
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static void destroy_emph (EMPH *a);
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static void flush_emph (EMPH *a);
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static void xemph (EMPH *a, int position);
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static void setBuffers_emph (EMPH *a, float* in, float* out);
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static void setSamplerate_emph (EMPH *a, int rate);
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static void setSize_emph (EMPH *a, int size);
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private:
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static void calc_emph (EMPH *a);
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static void decalc_emph (EMPH *a);
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};
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} // namespace WDSP
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#endif
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