sdrangel/plugins/channel/ssb/ssbdemod.h

109 wiersze
3.4 KiB
C
Czysty Zwykły widok Historia

2014-05-21 17:31:14 +00:00
///////////////////////////////////////////////////////////////////////////////////
// Copyright (C) 2012 maintech GmbH, Otto-Hahn-Str. 15, 97204 Hoechberg, Germany //
// written by Christian Daniel //
// //
// 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 INCLUDE_SSBDEMOD_H
#define INCLUDE_SSBDEMOD_H
#include <QMutex>
2014-05-21 17:31:14 +00:00
#include <vector>
#include "dsp/samplesink.h"
#include "dsp/nco.h"
#include "dsp/interpolator.h"
2014-07-13 08:06:43 +00:00
#include "dsp/fftfilt.h"
2014-05-21 17:31:14 +00:00
#include "audio/audiofifo.h"
#include "util/message.h"
2014-07-13 08:06:43 +00:00
#define ssbFftLen 1024
2014-05-21 17:31:14 +00:00
class SSBDemod : public SampleSink {
public:
SSBDemod(SampleSink* sampleSink);
2015-08-17 06:29:34 +00:00
virtual ~SSBDemod();
2014-05-21 17:31:14 +00:00
void configure(MessageQueue* messageQueue, Real Bandwidth, Real LowCutoff, Real volume, int spanLog2);
2014-05-21 17:31:14 +00:00
virtual void feed(const SampleVector::const_iterator& begin, const SampleVector::const_iterator& end, bool positiveOnly);
2015-08-17 06:29:34 +00:00
virtual void start();
virtual void stop();
virtual bool handleMessage(const Message& cmd);
2014-05-21 17:31:14 +00:00
Real getMagSq() const { return m_magsq; }
2014-05-21 17:31:14 +00:00
private:
class MsgConfigureSSBDemod : public Message {
MESSAGE_CLASS_DECLARATION
public:
Real getBandwidth() const { return m_Bandwidth; }
Real getLoCutoff() const { return m_LowCutoff; }
2014-05-21 17:31:14 +00:00
Real getVolume() const { return m_volume; }
int getSpanLog2() const { return m_spanLog2; }
2014-05-21 17:31:14 +00:00
static MsgConfigureSSBDemod* create(Real Bandwidth, Real LowCutoff, Real volume, int spanLog2)
2014-05-21 17:31:14 +00:00
{
return new MsgConfigureSSBDemod(Bandwidth, LowCutoff, volume, spanLog2);
2014-05-21 17:31:14 +00:00
}
private:
Real m_Bandwidth;
Real m_LowCutoff;
2014-05-21 17:31:14 +00:00
Real m_volume;
int m_spanLog2;
2014-05-21 17:31:14 +00:00
MsgConfigureSSBDemod(Real Bandwidth, Real LowCutoff, Real volume, int spanLog2) :
2014-05-21 17:31:14 +00:00
Message(),
m_Bandwidth(Bandwidth),
m_LowCutoff(LowCutoff),
m_volume(volume),
m_spanLog2(spanLog2)
2014-05-21 17:31:14 +00:00
{ }
};
struct AudioSample {
qint16 l;
qint16 r;
};
typedef std::vector<AudioSample> AudioVector;
Real m_Bandwidth;
Real m_LowCutoff;
2014-05-21 17:31:14 +00:00
Real m_volume;
int m_spanLog2;
2014-06-27 17:46:14 +00:00
int m_undersampleCount;
2014-05-21 17:31:14 +00:00
int m_sampleRate;
int m_frequency;
2014-07-13 08:06:43 +00:00
bool m_usb;
Real m_magsq;
2014-05-21 17:31:14 +00:00
NCO m_nco;
Interpolator m_interpolator;
Real m_sampleDistanceRemain;
2014-07-13 08:06:43 +00:00
fftfilt* SSBFilter;
2014-05-21 17:31:14 +00:00
2014-11-21 19:44:19 +00:00
SampleSink* m_sampleSink;
SampleVector m_sampleBuffer;
2014-05-21 17:31:14 +00:00
AudioVector m_audioBuffer;
uint m_audioBufferFill;
AudioFifo m_audioFifo;
quint32 m_audioSampleRate;
QMutex m_settingsMutex;
2014-05-21 17:31:14 +00:00
};
#endif // INCLUDE_SSBDEMOD_H