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56 lines
2.7 KiB
C++
56 lines
2.7 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2020 Edouard Griffiths, F4EXB //
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// //
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// This program is free software; you can redistribute it and/or modify //
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// it under the terms of the GNU General Public License as published by //
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// the Free Software Foundation as version 3 of the License, or //
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// (at your option) any later version. //
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// //
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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 V3 for more details. //
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// //
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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, see <http://www.gnu.org/licenses/>. //
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///////////////////////////////////////////////////////////////////////////////////
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// Half-band centered decimators with Complex (i.e. omplex<float>) input/output
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// Decimates by a power of two using centered half-band filters
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#ifndef INCLUDE_DSP_DECIMATORC_H_
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#define INCLUDE_DSP_DECIMATORC_H_
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#include "dsp/dsptypes.h"
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#include "dsp/inthalfbandfiltereof.h"
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#include "export.h"
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#define DECIMATORSXS_HB_FILTER_ORDER 64
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class SDRBASE_API DecimatorC
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{
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public:
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DecimatorC();
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void setLog2Decim(unsigned int log2Decim);
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bool decimate(Complex c, Complex& cd);
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unsigned int getDecim() const { return m_decim; }
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private:
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IntHalfbandFilterEOF<DECIMATORSXS_HB_FILTER_ORDER, true> m_decimator2; // 1st stages
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IntHalfbandFilterEOF<DECIMATORSXS_HB_FILTER_ORDER, true> m_decimator4; // 2nd stages
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IntHalfbandFilterEOF<DECIMATORSXS_HB_FILTER_ORDER, true> m_decimator8; // 3rd stages
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IntHalfbandFilterEOF<DECIMATORSXS_HB_FILTER_ORDER, true> m_decimator16; // 4th stages
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IntHalfbandFilterEOF<DECIMATORSXS_HB_FILTER_ORDER, true> m_decimator32; // 5th stages
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IntHalfbandFilterEOF<DECIMATORSXS_HB_FILTER_ORDER, true> m_decimator64; // 6th stages
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unsigned int m_log2Decim;
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unsigned int m_decim;
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bool decimate2(Complex c, Complex& cd);
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bool decimate4(Complex c, Complex& cd);
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bool decimate8(Complex c, Complex& cd);
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bool decimate16(Complex c, Complex& cd);
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bool decimate32(Complex c, Complex& cd);
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bool decimate64(Complex c, Complex& cd);
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};
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#endif // INCLUDE_DSP_DECIMATORC_H_
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