frequencyseekhelper.h

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00001 /***************************************************************************
00002                           frequencyseekhelper.h  -  description
00003                              -------------------
00004     begin                : Fre Mai 9 2003
00005     copyright            : (C) 2003 by Martin Witte
00006     email                : witte@kawo1.rwth-aachen.de
00007  ***************************************************************************/
00008 
00009 /***************************************************************************
00010  *                                                                         *
00011  *   This program is free software; you can redistribute it and/or modify  *
00012  *   it under the terms of the GNU General Public License as published by  *
00013  *   the Free Software Foundation; either version 2 of the License, or     *
00014  *   (at your option) any later version.                                   *
00015  *                                                                         *
00016  ***************************************************************************/
00017 
00018 #ifndef KRADIO_FREQUENCY_SEEKHELPER_H
00019 #define KRADIO_FREQUENCY_SEEKHELPER_H
00020 
00021 #ifdef HAVE_CONFIG_H
00022 #include <config.h>
00023 #endif
00024 
00025 #include <qobject.h>
00026 #include "radiodevice_interfaces.h"
00027 #include "seekhelper.h"
00028 
00029 class FrequencySeekHelper : public QObject,
00030                             public SeekHelper,
00031                             public IFrequencyRadioClient
00032 {
00033 Q_OBJECT
00034 public:
00035 
00036     FrequencySeekHelper(ISeekRadio &parent);
00037     virtual ~FrequencySeekHelper();
00038 
00039 // IFrequencyRadioClient
00040 RECEIVERS:
00041     bool noticeFrequencyChanged(float /*f*/, const RadioStation */*s*/)  { return false; }
00042     bool noticeMinMaxFrequencyChanged(float /*min*/, float /*max*/)      { return false; }
00043     bool noticeDeviceMinMaxFrequencyChanged(float /*min*/, float /*max*/){ return false; }
00044     bool noticeScanStepChanged(float /*s*/)                              { return false; }
00045 
00046 public:
00047 
00048     virtual bool     connectI   (Interface *i);
00049     virtual bool     disconnectI(Interface *i);
00050 
00051     virtual void     start(const SoundStreamID &, direction_t dir);
00052 
00053 public slots:
00054 
00055     virtual void step() { SeekHelper::step(); }
00056 
00057 protected:
00058     virtual void abort();
00059     virtual bool isGood() const;
00060     virtual bool isBetter() const;
00061     virtual bool isWorse() const;
00062     virtual bool bestFound() const;
00063     virtual void getData();
00064     virtual void rememberBest();
00065     virtual bool nextSeekStep();
00066     virtual void applyBest();
00067 
00068 protected:
00069     QTimer  *m_timer;
00070 
00071     float    m_currentSignal, m_oldSignal;
00072     bool     m_goodSignal;
00073     float    m_currentFrequency, m_oldFrequency;
00074     float    m_bestFrequency;
00075 };
00076 
00077 #endif
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