/*

* Copyright (c) 2002-2003 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

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

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:

*

*/

#ifndef __MMF_TMMFAUDIO_CODEC_BASE_H__

#define __MMF_TMMFAUDIO_CODEC_BASE_H__

#include <e32std.h>

#include "MMFAudioDataSettings.h"

const TInt KClamp = 32768;

const TInt KMaskSign16bit = 0x8000;

const TInt KMaskSign8bit = 0x80;

const TInt KAndMask8bit = 0xff;

const TInt KMaxImaAdpcmTableEntries = 88;

const TUint KImaAdpcmBlockAlign = 256;

//samples per block = [((block align - (4 * nChannels)) * 8) / (bits per sample * nChannels)] + 1

const TUint KImaAdpcmSamplesPerBlock = ((KImaAdpcmBlockAlign - 4)*2) + 1;	//505

const TUint KImaAdpcmStereoSamplesPerBlock = (KImaAdpcmBlockAlign - 8) + 1; //249

const TUint KImaAdpcmTempBufferSize = KImaAdpcmSamplesPerBlock*2;

const TUint KImaAdpcmStereoTempBufferSize = KImaAdpcmStereoSamplesPerBlock*4;

//Gsm coded Frame size

const TInt KCodedBufferSize = 152;

// Base of Audio codecs

/*

*

* class TMMFAudioCodecBase

*

*/

class TMMFAudioCodecBase

	{

public:

	inline TMMFAudioCodecBase();

	//

	virtual void Convert(TUint8* aSrc, TUint8* aDst, TInt aSamples)=0;

	};

inline TMMFAudioCodecBase::TMMFAudioCodecBase()

	{}

#endif //__MMF_TMMFAUDIO_CODEC_BASE_H__