kopia lustrzana https://github.com/f4exb/sdrangel
141 wiersze
4.4 KiB
C++
141 wiersze
4.4 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2012 maintech GmbH, Otto-Hahn-Str. 15, 97204 Hoechberg, Germany //
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// (C) 2015 John Greb //
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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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// //
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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 INCLUDE_LoRaDEMOD_H
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#define INCLUDE_LoRaDEMOD_H
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#include <QMutex>
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#include <vector>
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#include <dsp/basebandsamplesink.h>
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#include "dsp/nco.h"
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#include "dsp/interpolator.h"
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#include "util/message.h"
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#include "dsp/fftfilt.h"
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#include "lorademodsettings.h"
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#define DATA_BITS (6)
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#define SAMPLEBITS (DATA_BITS + 2)
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#define SPREADFACTOR (1 << SAMPLEBITS)
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#define LORA_SFFT_LEN (SPREADFACTOR / 2)
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#define LORA_SQUELCH (3)
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class DeviceSourceAPI;
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class ThreadedBasebandSampleSink;
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class DownChannelizer;
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class LoRaDemod : public BasebandSampleSink {
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public:
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class MsgConfigureLoRaDemod : public Message {
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MESSAGE_CLASS_DECLARATION
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public:
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const LoRaDemodSettings& getSettings() const { return m_settings; }
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bool getForce() const { return m_force; }
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static MsgConfigureLoRaDemod* create(const LoRaDemodSettings& settings, bool force)
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{
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return new MsgConfigureLoRaDemod(settings, force);
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}
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private:
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LoRaDemodSettings m_settings;
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bool m_force;
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MsgConfigureLoRaDemod(const LoRaDemodSettings& settings, bool force) :
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Message(),
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m_settings(settings),
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m_force(force)
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{ }
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};
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class MsgConfigureChannelizer : public Message {
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MESSAGE_CLASS_DECLARATION
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public:
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int getSampleRate() const { return m_sampleRate; }
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int getCenterFrequency() const { return m_centerFrequency; }
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static MsgConfigureChannelizer* create(int sampleRate, int centerFrequency)
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{
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return new MsgConfigureChannelizer(sampleRate, centerFrequency);
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}
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private:
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int m_sampleRate;
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int m_centerFrequency;
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MsgConfigureChannelizer(int sampleRate, int centerFrequency) :
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Message(),
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m_sampleRate(sampleRate),
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m_centerFrequency(centerFrequency)
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{ }
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};
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LoRaDemod(DeviceSourceAPI* deviceAPI);
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virtual ~LoRaDemod();
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void setSpectrumSink(BasebandSampleSink* sampleSink) { m_sampleSink = sampleSink; }
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virtual void feed(const SampleVector::const_iterator& begin, const SampleVector::const_iterator& end, bool pO);
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virtual void start();
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virtual void stop();
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virtual bool handleMessage(const Message& cmd);
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private:
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int detect(Complex sample, Complex angle);
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void dumpRaw(void);
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short synch (short bin);
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short toGray(short bin);
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void interleave6(char* inout, int size);
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void hamming6(char* inout, int size);
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void prng6(char* inout, int size);
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DeviceSourceAPI *m_deviceAPI;
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ThreadedBasebandSampleSink* m_threadedChannelizer;
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DownChannelizer* m_channelizer;
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LoRaDemodSettings m_settings;
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Real m_Bandwidth;
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int m_sampleRate;
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int m_frequency;
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int m_chirp;
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int m_angle;
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int m_bin;
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int m_result;
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int m_count;
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int m_header;
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int m_time;
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short m_tune;
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sfft* loraFilter;
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sfft* negaFilter;
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float* mov;
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short* history;
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short* finetune;
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NCO m_nco;
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Interpolator m_interpolator;
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Real m_sampleDistanceRemain;
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BasebandSampleSink* m_sampleSink;
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SampleVector m_sampleBuffer;
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QMutex m_settingsMutex;
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};
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#endif // INCLUDE_LoRaDEMOD_H
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