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1 //a3ffourcclookup.h |
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2 |
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3 // Copyright (c) 2007-2009 Nokia Corporation and/or its subsidiary(-ies). |
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4 // All rights reserved. |
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5 // This component and the accompanying materials are made available |
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6 // under the terms of "Eclipse Public License v1.0" |
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7 // which accompanies this distribution, and is available |
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8 // at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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9 // |
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10 // Initial Contributors: |
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11 // Nokia Corporation - initial contribution. |
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12 // |
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13 // Contributors: |
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14 // |
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15 // Description: |
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16 // |
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17 |
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18 /** |
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19 @file |
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20 @internalTechnology |
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21 */ |
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22 |
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23 |
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24 #ifndef A3FFOURCCLOOKUP_H |
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25 #define A3FFOURCCLOOKUP_H |
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26 |
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27 //INCLUDES |
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28 #include <ecom/ecom.h> |
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29 #include <mmf/common/mmfutilities.h> |
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30 #include <e32hashtab.h> |
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31 #include <a3f/a3fbase.h> |
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32 |
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33 //CLASS DECLARATION |
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34 /* |
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35 CFourCCConvertor class |
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36 This is a class used to load the format Uids and fourCC codes in to Cache Table. |
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37 This class is used for resolution of the fourCC code corresponding to format UID and vice-versa. |
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38 */ |
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39 class CFourCCConvertor : public CBase |
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40 { |
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41 public: |
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42 /* |
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43 Create a Single instance of a class.If the instance is already created, It |
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44 returns that instance. |
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45 */ |
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46 IMPORT_C static CFourCCConvertor* NewL(); |
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47 |
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48 /* |
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49 This method is used to find fourCC code corresponding to format Uid from cache table. |
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50 @param TUid aFormat a unique format Uid. |
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51 @param TFourCC &aFourCC The unique FourCC code. |
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52 @return an error code. KErrNone if successful, otherwise one of the system wide error codes. |
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53 */ |
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54 IMPORT_C TInt FormatToFourCC(TUid aFormat,TFourCC &aFourCC); |
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55 |
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56 /* |
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57 This method is used to find format Uid corresponding to fourCC Code from cache table. |
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58 @param TFourCC &aFourCC The unique FourCC code. |
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59 @param TUid aFormat a unique format Uid. |
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60 @return an error code. KErrNone if successful, otherwise one of the system wide error codes. |
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61 */ |
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62 IMPORT_C TInt FourCCToFormat(TFourCC aFourCC, TUid &aFormat) const; |
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63 |
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64 /* |
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65 Destructor |
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66 */ |
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67 virtual ~CFourCCConvertor(); |
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68 |
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69 private: |
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70 /* |
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71 Constructor |
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72 */ |
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73 CFourCCConvertor(); |
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74 |
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75 /* |
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76 Second Phase Constructor |
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77 */ |
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78 void ConstructL(); |
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79 |
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80 /* |
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81 This method is used to initialize the cache tables. This method uses two cache |
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82 tables. It Stores Format Uids corresponding to fourCC Codes in one cache table |
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83 and fourCC codes corresponding to Format Uids in another cache table. In the First |
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84 cache table,it uses format Uid as key and in the second cache table, it uses fourCC code as key. |
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85 */ |
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86 void LoadL(); |
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87 |
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88 // DATA DECLARATION |
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89 |
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90 /* Cache Table that stores FourCC codes corresponding to Format Uids */ |
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91 RHashMap<TUint32,TUint32> *iHashFourCCToFormat; |
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92 |
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93 /* Cache Table that stores format Uids corresponding to FourCC codes */ |
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94 RHashMap<TUint32,TUint32> *iHashFormatToFourCC; |
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95 |
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96 }; |
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97 |
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98 #endif // A3FFOURCCLOOKUP_H |