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1 /* |
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2 * Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies). |
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3 * All rights reserved. |
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4 * This component and the accompanying materials are made available |
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5 * under the terms of "Eclipse Public License v1.0" |
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6 * which accompanies this distribution, and is available |
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7 * at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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8 * |
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9 * Initial Contributors: |
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10 * Nokia Corporation - initial contribution. |
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11 * |
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12 * Contributors: |
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13 * |
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14 * Description: |
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15 * |
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16 */ |
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17 |
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18 // System includes |
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19 #include <qtimer> |
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20 |
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21 // User includes |
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22 #include "radiofrequencyscanninghandler.h" |
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23 #include "radioenginewrapper_p.h" |
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24 #include "cradioenginehandler.h" |
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25 #include "radiostationhandlerif.h" |
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26 |
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27 /*! |
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28 * |
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29 */ |
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30 RadioFrequencyScanningHandler::RadioFrequencyScanningHandler( RadioEngineWrapperPrivate& radioEngine ) : |
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31 QObject( 0 ), |
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32 mEngine( radioEngine ), |
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33 mLastFoundFrequency( 0 ) |
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34 { |
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35 } |
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36 |
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37 /*! |
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38 * From MRadioScanObserver |
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39 * |
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40 */ |
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41 void RadioFrequencyScanningHandler::ScanFrequencyEventL( TUint32 aFrequency ) |
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42 { |
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43 // The scanning logic starts from the minimun frequency and advances as long as |
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44 // the found frequency is higher than the last one. When it loops around from the highest |
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45 // frequency back to the lowest one we check if it stops at the minimun frequency and |
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46 // add the station there. This logic handles the special case where there is a station in the |
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47 // minimum frequency, but does not work if there are no stations at all. The adaptation has a |
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48 // timeout timer that stops the scanning if nothing is found and reports the scanning start |
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49 // frequency which is this case will be the minimum frequency. In that case this logic will |
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50 // assume that it was an audible station and adds it. |
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51 |
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52 uint frequency = static_cast<uint>( aFrequency ); |
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53 mEngine.mStationHandler.setCurrentStation( frequency ); |
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54 if ( frequency > mLastFoundFrequency ) { |
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55 mLastFoundFrequency = frequency; |
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56 addFoundStation( frequency ); |
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57 } else if ( frequency == mEngine.mEngineHandler->MinFrequency() ) { |
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58 // Special case. A station has been found in the mininmum frequency |
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59 addFoundStation( frequency ); |
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60 } |
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61 } |
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62 |
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63 /*! |
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64 * From MRadioScanObserver |
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65 * |
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66 */ |
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67 void RadioFrequencyScanningHandler::ScanCompletedEventL( TInt aError ) |
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68 { |
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69 Q_UNUSED( aError ) |
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70 |
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71 mEngine.frequencyScannerFinished(); // Causes the scanner to be deleted so nothing can be done after this |
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72 } |
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73 |
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74 |
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75 /*! |
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76 * Starts the scanning |
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77 */ |
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78 void RadioFrequencyScanningHandler::startScanning( bool muted ) |
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79 { |
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80 cancel(); |
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81 QTimer::singleShot( 1000, this, SLOT(delayedStart()) ); |
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82 } |
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83 |
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84 /*! |
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85 * Adds a new station that was found |
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86 */ |
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87 void RadioFrequencyScanningHandler::addFoundStation( const uint frequency ) |
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88 { |
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89 mEngine.mStationHandler.addScannedFrequency( frequency ); |
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90 } |
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91 |
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92 /*! |
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93 * Cancels the scanning process |
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94 */ |
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95 void RadioFrequencyScanningHandler::cancel() |
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96 { |
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97 mEngine.mEngineHandler->StopScan(); |
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98 } |
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99 |
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100 /*! |
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101 * |
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102 */ |
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103 void RadioFrequencyScanningHandler::delayedStart() |
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104 { |
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105 mEngine.mStationHandler.removeLocalStations(); |
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106 |
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107 mLastFoundFrequency = mEngine.mEngineHandler->MinFrequency(); |
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108 mEngine.mEngineHandler->StartScan( *this ); |
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109 } |