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105 lines
4.4 KiB
C++
105 lines
4.4 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2019 F4EXB //
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// written by Edouard Griffiths //
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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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#ifndef SDRBASE_DSP_UPCHANNELIZER_H_
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#define SDRBASE_DSP_UPCHANNELIZER_H_
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#include <QObject>
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#include <algorithm>
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#include "export.h"
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#include "util/message.h"
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#include "channelsamplesource.h"
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#ifdef USE_SSE4_1
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#include "dsp/inthalfbandfiltereo1.h"
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#else
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#include "dsp/inthalfbandfilterdb.h"
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#endif
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#define UPCHANNELIZER_HB_FILTER_ORDER 96
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class SDRBASE_API UpChannelizer : public ChannelSampleSource {
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public:
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UpChannelizer(ChannelSampleSource* sampleSource);
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virtual ~UpChannelizer();
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virtual void pull(SampleVector::iterator begin, unsigned int nbSamples);
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virtual void pullOne(Sample& sample);
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virtual void prefetch(unsigned int nbSamples);
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void setInterpolation(unsigned int log2Interp, unsigned int filterChainHash); //!< Define channelizer with interpolation factor and filter chain definition
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void setChannelization(int requestedSampleRate, qint64 requestedCenterFrequency); //!< Define channelizer with requested sample rate and center frequency (shift in the baseband)
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void setBasebandSampleRate(int basebandSampleRate, bool interp = false); //!< interp: true => use direct interpolation false => use channel configuration
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int getChannelSampleRate() const { return m_channelSampleRate; };
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int getChannelFrequencyOffset() const { return m_channelFrequencyOffset; }
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protected:
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struct FilterStage {
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enum Mode {
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ModeCenter,
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ModeLowerHalf,
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ModeUpperHalf
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};
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#ifdef USE_SSE4_1
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typedef bool (IntHalfbandFilterEO1<UPCHANNELIZER_HB_FILTER_ORDER>::*WorkFunction)(Sample* sIn, Sample *sOut);
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IntHalfbandFilterEO1<UPCHANNELIZER_HB_FILTER_ORDER>* m_filter;
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#else
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typedef bool (IntHalfbandFilterDB<qint32, UPCHANNELIZER_HB_FILTER_ORDER>::*WorkFunction)(Sample* sIn, Sample *sOut);
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IntHalfbandFilterDB<qint32, UPCHANNELIZER_HB_FILTER_ORDER>* m_filter;
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#endif
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WorkFunction m_workFunction;
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FilterStage(Mode mode);
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~FilterStage();
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bool work(Sample* sampleIn, Sample *sampleOut) {
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return (m_filter->*m_workFunction)(sampleIn, sampleOut);
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}
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};
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typedef std::vector<FilterStage*> FilterStages;
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FilterStages m_filterStages;
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bool m_filterChainSetMode;
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std::vector<Sample> m_stageSamples;
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ChannelSampleSource* m_sampleSource; //!< Modulator
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int m_basebandSampleRate;
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int m_requestedInputSampleRate;
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int m_requestedCenterFrequency;
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int m_channelSampleRate;
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int m_channelFrequencyOffset;
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unsigned int m_log2Interp;
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unsigned int m_filterChainHash;
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SampleVector m_sampleBuffer;
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Sample m_sampleIn;
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void applyChannelization();
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void applyInterpolation();
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static Real channelMinSpace(Real sigStart, Real sigEnd, Real chanStart, Real chanEnd);
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Real createFilterChain(Real sigStart, Real sigEnd, Real chanStart, Real chanEnd);
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double setFilterChain(const std::vector<unsigned int>& stageIndexes); //!< returns offset in ratio of sample rate
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void freeFilterChain();
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};
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#endif // SDRBASE_DSP_UPCHANNELIZER_H_
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