sl@0: // Copyright (c) 2003-2009 Nokia Corporation and/or its subsidiary(-ies).
sl@0: // All rights reserved.
sl@0: // This component and the accompanying materials are made available
sl@0: // under the terms of "Eclipse Public License v1.0"
sl@0: // which accompanies this distribution, and is available
sl@0: // at the URL "http://www.eclipse.org/legal/epl-v10.html".
sl@0: //
sl@0: // Initial Contributors:
sl@0: // Nokia Corporation - initial contribution.
sl@0: //
sl@0: // Contributors:
sl@0: //
sl@0: // Description:
sl@0: //
sl@0: 
sl@0: class CWavDecodeUtility: public CBase
sl@0: 	{
sl@0: public:
sl@0: 	static CWavDecodeUtility* NewL(TDesC8& aBuffer);
sl@0: 	~CWavDecodeUtility();
sl@0: 
sl@0: 	inline TUint GetChannels(void) const  {return iChannels;};
sl@0: 	inline TUint GetSampleRate(void) const {return iSampleRate;};
sl@0: 	inline TUint GetBitsPerSample(void) const {return iBitsPerSample;};
sl@0: 	inline TUint GetDataLength(void) const {return iDataLength;};
sl@0: 
sl@0: 	inline TUint GetSamples(void) const {return iDataLength / (iChannels * iBitsPerSample / 8);};
sl@0: 	
sl@0: 
sl@0: private:
sl@0: 	CWavDecodeUtility();
sl@0: 	void ConstructL(TDesC8& aBuffer);
sl@0: 	TUint16 Read16(const TUint8* aPtr);
sl@0: 	TUint32 Read32(const TUint8* aPtr);
sl@0: 	void FindRiffChunksL(void);
sl@0: 	void ProcessFormatHeaderL();
sl@0: 	void ReadChunk(TMdaRiffChunk* aChunk);
sl@0: 	void AssignChunkTo(TMdaRiffChunk* aAssignedChunk);
sl@0: 	
sl@0: private:
sl@0: //	CMMFDataBuffer* iBuffer;
sl@0: 	TDesC8* iBuffer;
sl@0: 	const TUint8* iStartPtr;
sl@0: 	TUint iLastReadPosition;
sl@0: 	TBool iHasFactChunk;
sl@0: 	TMdaRiffChunk iCurrent;
sl@0: 	TMdaRiffChunk iFormatChunk;
sl@0: 	TMdaRiffChunk iFactChunk;
sl@0: 	TMdaRiffChunk iDataChunk;
sl@0: 	TUint iRiffChunkLength;
sl@0: 	TBool iFoundChunks;
sl@0: 	TBool iDone;
sl@0: 	TUint iStartPosition;
sl@0: 
sl@0: 	TUint iCodecId;
sl@0: 	TUint iChannels;
sl@0: 	TUint iSampleRate;
sl@0: 	TUint iBlockAlign;				//needed for correct IMA
sl@0: 	TUint iBitsPerSample;
sl@0: 
sl@0: 	TUint iDataLength;
sl@0: 	TUint iAverageBytesPerSecond;	//needed for correct IMA
sl@0: 	TUint iSamplesPerBlock;
sl@0: 	
sl@0: 	TUint iPos;
sl@0: 	TUint iClipLength;
sl@0: 
sl@0: 	};
sl@0: 
sl@0: