sdrangel/sdrbase/dsp/upchannelizer.h

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C++

///////////////////////////////////////////////////////////////////////////////////
// Copyright (C) 2016 F4EXB //
// written by Edouard Griffiths //
// //
// This program is free software; you can redistribute it and/or modify //
// it under the terms of the GNU General Public License as published by //
// the Free Software Foundation as version 3 of the License, or //
// //
// This program is distributed in the hope that it will be useful, //
// but WITHOUT ANY WARRANTY; without even the implied warranty of //
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
// GNU General Public License V3 for more details. //
// //
// You should have received a copy of the GNU General Public License //
// along with this program. If not, see <http://www.gnu.org/licenses/>. //
///////////////////////////////////////////////////////////////////////////////////
#ifndef SDRBASE_DSP_UPCHANNELIZER_H_
#define SDRBASE_DSP_UPCHANNELIZER_H_
#include <dsp/basebandsamplesource.h>
#include <vector>
#include <QMutex>
#include "util/export.h"
#include "util/message.h"
#ifdef USE_SSE4_1
#include "dsp/inthalfbandfiltereo1.h"
#else
#include "dsp/inthalfbandfilterdb.h"
#endif
#define UPCHANNELIZER_HB_FILTER_ORDER 96
class MessageQueue;
class SDRANGEL_API UpChannelizer : public BasebandSampleSource {
Q_OBJECT
public:
class SDRANGEL_API MsgChannelizerNotification : public Message {
MESSAGE_CLASS_DECLARATION
public:
MsgChannelizerNotification(int samplerate, qint64 frequencyOffset) :
Message(),
m_sampleRate(samplerate),
m_frequencyOffset(frequencyOffset)
{ }
int getSampleRate() const { return m_sampleRate; }
qint64 getFrequencyOffset() const { return m_frequencyOffset; }
private:
int m_sampleRate;
qint64 m_frequencyOffset;
};
UpChannelizer(BasebandSampleSource* sampleSink);
virtual ~UpChannelizer();
void configure(MessageQueue* messageQueue, int sampleRate, int centerFrequency);
int getOutputSampleRate() const { return m_outputSampleRate; }
virtual void start();
virtual void stop();
virtual void pull(Sample& sample);
virtual void pullAudio(int nbSamples) { if (m_sampleSource) m_sampleSource->pullAudio(nbSamples); }
virtual bool handleMessage(const Message& cmd);
protected:
struct FilterStage {
enum Mode {
ModeCenter,
ModeLowerHalf,
ModeUpperHalf
};
#ifdef USE_SSE4_1
typedef bool (IntHalfbandFilterEO1<UPCHANNELIZER_HB_FILTER_ORDER>::*WorkFunction)(Sample* sIn, Sample *sOut);
IntHalfbandFilterEO1<UPCHANNELIZER_HB_FILTER_ORDER>* m_filter;
#else
typedef bool (IntHalfbandFilterDB<UPCHANNELIZER_HB_FILTER_ORDER>::*WorkFunction)(Sample* sIn, Sample *sOut);
IntHalfbandFilterDB<UPCHANNELIZER_HB_FILTER_ORDER>* m_filter;
#endif
WorkFunction m_workFunction;
FilterStage(Mode mode);
~FilterStage();
bool work(Sample* sampleIn, Sample *sampleOut)
{
return (m_filter->*m_workFunction)(sampleIn, sampleOut);
}
};
typedef std::vector<FilterStage*> FilterStages;
FilterStages m_filterStages;
std::vector<Sample> m_stageSamples;
BasebandSampleSource* m_sampleSource; //!< Modulator
int m_outputSampleRate;
int m_requestedInputSampleRate;
int m_requestedCenterFrequency;
int m_currentInputSampleRate;
int m_currentCenterFrequency;
SampleVector m_sampleBuffer;
Sample m_sampleIn;
QMutex m_mutex;
void applyConfiguration();
bool signalContainsChannel(Real sigStart, Real sigEnd, Real chanStart, Real chanEnd) const;
Real createFilterChain(Real sigStart, Real sigEnd, Real chanStart, Real chanEnd);
void freeFilterChain();
signals:
void outputSampleRateChanged();
};
#endif /* SDRBASE_DSP_UPCHANNELIZER_H_ */