mirror of
https://github.com/f4exb/sdrangel.git
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136 lines
4.2 KiB
C++
136 lines
4.2 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2016 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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// //
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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 PLUGINS_CHANNELTX_MODAM_AMMOD_H_
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#define PLUGINS_CHANNELTX_MODAM_AMMOD_H_
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#include <QMutex>
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#include <vector>
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#include "dsp/basebandsamplesource.h"
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#include "dsp/nco.h"
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#include "dsp/interpolator.h"
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#include "dsp/lowpass.h"
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#include "dsp/movingaverage.h"
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#include "dsp/agc.h"
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#include "audio/audiofifo.h"
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#include "util/message.h"
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class AMMod : public BasebandSampleSource {
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Q_OBJECT
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public:
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AMMod();
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~AMMod();
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void configure(MessageQueue* messageQueue, Real rfBandwidth, Real afBandwidth, float modFactor, bool audioMute);
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virtual void pull(Sample& sample);
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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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Real getMagSq() const { return m_magsq; }
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private:
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class MsgConfigureAMMod : public Message {
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MESSAGE_CLASS_DECLARATION
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public:
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Real getRFBandwidth() const { return m_rfBandwidth; }
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Real getAFBandwidth() const { return m_afBandwidth; }
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float getModFactor() const { return m_modFactor; }
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bool getAudioMute() const { return m_audioMute; }
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static MsgConfigureAMMod* create(Real rfBandwidth, Real afBandwidth, float modFactor, bool audioMute)
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{
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return new MsgConfigureAMMod(rfBandwidth, afBandwidth, modFactor, audioMute);
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}
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private:
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Real m_rfBandwidth;
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Real m_afBandwidth;
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float m_modFactor;
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bool m_audioMute;
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MsgConfigureAMMod(Real rfBandwidth, Real afBandwidth, float modFactor, bool audioMute) :
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Message(),
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m_rfBandwidth(rfBandwidth),
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m_afBandwidth(afBandwidth),
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m_modFactor(modFactor),
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m_audioMute(audioMute)
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{ }
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};
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struct AudioSample {
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qint16 l;
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qint16 r;
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};
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typedef std::vector<AudioSample> AudioVector;
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enum RateState {
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RSInitialFill,
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RSRunning
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};
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struct Config {
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int m_outputSampleRate;
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qint64 m_inputFrequencyOffset;
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Real m_rfBandwidth;
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Real m_afBandwidth;
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float m_modFactor;
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quint32 m_audioSampleRate;
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bool m_audioMute;
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Config() :
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m_outputSampleRate(-1),
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m_inputFrequencyOffset(0),
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m_rfBandwidth(-1),
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m_afBandwidth(-1),
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m_modFactor(0.2f),
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m_audioSampleRate(0),
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m_audioMute(false)
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{ }
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};
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Config m_config;
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Config m_running;
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NCO m_carrierNco;
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NCO m_toneNco;
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Complex m_modSample;
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Interpolator m_interpolator;
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Real m_interpolatorDistance;
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Real m_interpolatorDistanceRemain;
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bool m_interpolatorConsumed;
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Lowpass<Real> m_lowpass;
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Real m_magsq;
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MovingAverage<Real> m_movingAverage;
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SimpleAGC m_volumeAGC;
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AudioVector m_audioBuffer;
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uint m_audioBufferFill;
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AudioFifo m_audioFifo;
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SampleVector m_sampleBuffer;
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QMutex m_settingsMutex;
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void apply();
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};
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#endif /* PLUGINS_CHANNELTX_MODAM_AMMOD_H_ */
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