1 // Copyright (c) 2003-2009 Nokia Corporation and/or its subsidiary(-ies).

     2 // All rights reserved.

     3 // This component and the accompanying materials are made available

     4 // under the terms of "Eclipse Public License v1.0"

     5 // which accompanies this distribution, and is available

     6 // at the URL "http://www.eclipse.org/legal/epl-v10.html".

     7 //

     8 // Initial Contributors:

     9 // Nokia Corporation - initial contribution.

    10 //

    11 // Contributors:

    12 //

    13 // Description:

    14 //

    15 

    16 class CWavDecodeUtility: public CBase

    17 	{

    18 public:

    19 	static CWavDecodeUtility* NewL(TDesC8& aBuffer);

    20 	~CWavDecodeUtility();

    21 

    22 	inline TUint GetChannels(void) const  {return iChannels;};

    23 	inline TUint GetSampleRate(void) const {return iSampleRate;};

    24 	inline TUint GetBitsPerSample(void) const {return iBitsPerSample;};

    25 	inline TUint GetDataLength(void) const {return iDataLength;};

    26 

    27 	inline TUint GetSamples(void) const {return iDataLength / (iChannels * iBitsPerSample / 8);};

    28 	

    29 

    30 private:

    31 	CWavDecodeUtility();

    32 	void ConstructL(TDesC8& aBuffer);

    33 	TUint16 Read16(const TUint8* aPtr);

    34 	TUint32 Read32(const TUint8* aPtr);

    35 	void FindRiffChunksL(void);

    36 	void ProcessFormatHeaderL();

    37 	void ReadChunk(TMdaRiffChunk* aChunk);

    38 	void AssignChunkTo(TMdaRiffChunk* aAssignedChunk);

    39 	

    40 private:

    41 //	CMMFDataBuffer* iBuffer;

    42 	TDesC8* iBuffer;

    43 	const TUint8* iStartPtr;

    44 	TUint iLastReadPosition;

    45 	TBool iHasFactChunk;

    46 	TMdaRiffChunk iCurrent;

    47 	TMdaRiffChunk iFormatChunk;

    48 	TMdaRiffChunk iFactChunk;

    49 	TMdaRiffChunk iDataChunk;

    50 	TUint iRiffChunkLength;

    51 	TBool iFoundChunks;

    52 	TBool iDone;

    53 	TUint iStartPosition;

    54 

    55 	TUint iCodecId;

    56 	TUint iChannels;

    57 	TUint iSampleRate;

    58 	TUint iBlockAlign;				//needed for correct IMA

    59 	TUint iBitsPerSample;

    60 

    61 	TUint iDataLength;

    62 	TUint iAverageBytesPerSecond;	//needed for correct IMA

    63 	TUint iSamplesPerBlock;

    64 	

    65 	TUint iPos;

    66 	TUint iClipLength;

    67 

    68 	};

    69 

    70