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1 /* |
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2 * Copyright (c) 2010 Ixonos Plc. |
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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 the "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 * Ixonos Plc |
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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 |
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20 #ifndef __CPROCMP3FRAMEHANDLER_H__ |
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21 #define __CPROCMP3FRAMEHANDLER_H__ |
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22 |
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23 /*-- System Headers. --*/ |
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24 #include <e32base.h> |
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25 |
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26 /*-- Project Headers. --*/ |
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27 #include "AudCommon.h" |
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28 #include "ProcFrameHandler.h" |
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29 #include "ProcInFileHandler.h" |
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30 |
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31 #include "MP3API.h" |
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32 |
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33 /** |
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34 * Frame handler class for accessing MP3 data elements. |
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35 * |
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36 * @author Juha Ojanperä |
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37 */ |
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38 class CProcMP3FrameHandler : public CProcFrameHandler |
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39 { |
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40 public: |
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41 |
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42 |
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43 /* |
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44 * Constructors & destructor |
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45 */ |
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46 static CProcMP3FrameHandler* NewL(); |
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47 static CProcMP3FrameHandler* NewLC(); |
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48 |
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49 ~CProcMP3FrameHandler(); |
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50 |
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51 |
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52 // From base class CProcFrameHandler ----------> |
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53 TBool ManipulateGainL(const HBufC8* aFrameIn, HBufC8*& aFrameOut, TInt8 aGain); |
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54 TBool GetGainL(const HBufC8* aFrame, RArray<TInt>& aGains, TInt& aMaxGain) const; |
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55 TBool GetNormalizingMargin(const HBufC8* aFrame, TInt8& aMargin) const; |
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56 TBool IsMixingAvailable() const; |
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57 // <-------------------------------------------- |
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58 |
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59 |
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60 |
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61 private: |
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62 |
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63 // ConstructL |
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64 void ConstructL(); |
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65 |
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66 // c++ constructor |
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67 CProcMP3FrameHandler(); |
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68 |
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69 // internal function for reading MP3 gains |
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70 TBool GetMP3Gains(const HBufC8* aFrame, RArray<TInt>& aGains, TInt& aMaxGain, TBitStream& aBs) const; |
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71 |
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72 private: |
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73 |
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74 // a handle to MP3 editing class in MP3AACManipLib |
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75 CMp3Edit* iMp3Edit; |
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76 |
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77 // a flag to indicate whether MP3 decoder is initialized |
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78 mutable TBool decInitialized; |
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79 |
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80 // a handle to CMPAudDec |
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81 CMPAudDec *iMpAud; |
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82 TMpTransportHandle *iTHandle; |
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83 |
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84 |
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85 friend class CProcMP3InFileHandler; |
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86 |
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87 }; |
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88 |
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89 #endif /*-- __CPROCMP3FRAMEHANDLER_H__ --*/ |