00001 /*************************************************************************** 00002 seekhelper.h - description 00003 ------------------- 00004 begin : Sam Mai 10 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_SEEKHELPER_H 00019 #define KRADIO_SEEKHELPER_H 00020 00021 #ifdef HAVE_CONFIG_H 00022 #include <config.h> 00023 #endif 00024 00025 #include "radiodevice_interfaces.h" 00026 #include "soundstreamclient_interfaces.h" 00027 00028 00029 class SeekHelper : public IRadioDeviceClient, 00030 public ISoundStreamClient 00031 { 00032 public: 00033 typedef enum { off, searchWorse, searchBest } state_t; 00034 typedef enum { up, down } direction_t; 00035 00036 SeekHelper(ISeekRadio &parent); 00037 virtual ~SeekHelper(); 00038 00039 virtual bool connectI (Interface *i); 00040 virtual bool disconnectI(Interface *i); 00041 00042 virtual void start(const SoundStreamID &id, direction_t dir); 00043 virtual void step(); 00044 virtual void stop(); 00045 00046 bool isRunning() const { return m_state != off; } 00047 bool isRunningUp() const { return m_state != off && m_direction == up; } 00048 bool isRunningDown() const { return m_state != off && m_direction == down; } 00049 00050 00051 // IRadioDeviceClient 00052 RECEIVERS: 00053 bool noticePowerChanged (bool /*on*/, const IRadioDevice */*sender*/) { return false; } 00054 bool noticeStationChanged (const RadioStation &, const IRadioDevice */*sender*/) { return false; } 00055 bool noticeDescriptionChanged (const QString &, const IRadioDevice */*sender*/) { return false; } 00056 00057 bool noticeCurrentSoundStreamIDChanged(SoundStreamID /*id*/, const IRadioDevice */*sender*/) { return false; } 00058 00059 protected: 00060 00061 virtual void finish(); 00062 00063 virtual void abort() = 0; 00064 virtual bool isGood() const = 0; 00065 virtual bool isBetter() const = 0; 00066 virtual bool isWorse() const = 0; 00067 virtual bool bestFound() const = 0; 00068 virtual void getData() = 0; 00069 virtual void rememberBest() = 0; 00070 virtual bool nextSeekStep() = 0; 00071 virtual void applyBest() = 0; 00072 00073 protected: 00074 state_t m_state; 00075 direction_t m_direction; 00076 bool m_oldMute; 00077 00078 ISeekRadio &m_parent; 00079 SoundStreamID m_SoundStreamID; 00080 }; 00081 00082 #endif 00083