mirror of https://github.com/f4exb/sdrangel.git
86 lines
2.1 KiB
C++
86 lines
2.1 KiB
C++
#ifndef INCLUDE_CHANNELIZER_H
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#define INCLUDE_CHANNELIZER_H
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#include <list>
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#include <QMutex>
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#include "dsp/samplesink.h"
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#include "util/export.h"
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#include "util/message.h"
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class MessageQueue;
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class IntHalfbandFilter;
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class SDRANGEL_API Channelizer : public SampleSink {
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Q_OBJECT
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public:
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class SDRANGEL_API MsgChannelizerNotification : public Message {
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MESSAGE_CLASS_DECLARATION
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public:
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MsgChannelizerNotification(int samplerate, qint64 frequencyOffset) :
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Message(),
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m_sampleRate(samplerate),
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m_frequencyOffset(frequencyOffset)
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{ }
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int getSampleRate() const { return m_sampleRate; }
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qint64 getFrequencyOffset() const { return m_frequencyOffset; }
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private:
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int m_sampleRate;
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qint64 m_frequencyOffset;
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};
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Channelizer(SampleSink* sampleSink);
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virtual ~Channelizer();
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void configure(MessageQueue* messageQueue, int sampleRate, int centerFrequency);
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int getInputSampleRate() const { return m_inputSampleRate; }
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virtual void start();
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virtual void stop();
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virtual void feed(const SampleVector::const_iterator& begin, const SampleVector::const_iterator& end, bool positiveOnly);
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virtual bool handleMessage(const Message& cmd);
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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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typedef bool (IntHalfbandFilter::*WorkFunction)(Sample* s);
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IntHalfbandFilter* m_filter;
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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* sample)
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{
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return (m_filter->*m_workFunction)(sample);
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}
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};
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typedef std::list<FilterStage*> FilterStages;
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FilterStages m_filterStages;
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SampleSink* m_sampleSink;
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int m_inputSampleRate;
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int m_requestedOutputSampleRate;
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int m_requestedCenterFrequency;
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int m_currentOutputSampleRate;
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int m_currentCenterFrequency;
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SampleVector m_sampleBuffer;
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QMutex m_mutex;
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void applyConfiguration();
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bool signalContainsChannel(Real sigStart, Real sigEnd, Real chanStart, Real chanEnd) const;
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Real createFilterChain(Real sigStart, Real sigEnd, Real chanStart, Real chanEnd);
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void freeFilterChain();
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signals:
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void inputSampleRateChanged();
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};
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#endif // INCLUDE_CHANNELIZER_H
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