/*

 * 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__