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1 /* |
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2 * Copyright (c) 2002 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: Base class for RateControl implementations. |
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15 * |
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16 */ |
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17 |
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18 |
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19 #ifndef CMMARATECONTROL_H |
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20 #define CMMARATECONTROL_H |
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21 |
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22 // EXTERNAL INCLUDES |
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23 |
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24 // INTERNAL INCLUDES |
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25 #include "cmmacontrol.h" // base class |
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26 |
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27 // CONSTANTS |
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28 |
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29 static const TInt KMMADefaultRate = 100000; |
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30 static const TInt KMMAMinRate = 0; |
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31 |
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32 // Constant for control name. Name is used in Java side to instantiate |
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33 // Java Class which uses CMMARateControl. |
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34 _LIT(KMMARateControlName, "RateControl"); |
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35 |
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36 |
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37 // CLASS DECLARATION |
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38 /** |
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39 * This class is the base class for RateControl implementations. |
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40 * |
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41 * |
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42 */ |
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43 NONSHARABLE_CLASS(CMMARateControl): public CMMAControl |
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44 { |
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45 public: |
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46 /** |
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47 * Destructor. |
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48 */ |
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49 ~CMMARateControl(); |
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50 |
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51 protected: |
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52 /** |
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53 * Constructor. |
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54 */ |
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55 CMMARateControl(); |
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56 |
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57 public: // From CMMAControl |
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58 virtual const TDesC& ClassName() const; |
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59 |
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60 public: // New methods |
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61 /** |
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62 * @param aRate Rate to set in "milli-percentage".. |
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63 * @return Actual rate set. |
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64 */ |
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65 virtual TInt SetRateL(TInt aRate) = 0; |
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66 |
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67 /** |
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68 * @return The current playback rate in "milli-percentage". |
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69 */ |
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70 virtual TInt RateL() = 0; |
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71 |
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72 /** |
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73 * @return The maximum rate supported. |
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74 */ |
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75 virtual TInt MaxRateL(); |
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76 |
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77 /** |
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78 * @return The minimum rate supported. |
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79 */ |
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80 virtual TInt MinRateL(); |
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81 |
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82 }; |
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83 |
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84 |
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85 #endif // CMMARATECONTROL_H |