1 /*

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

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

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

     6 * which accompanies this distribution, and is available

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

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description:

    15 *

    16 */

    17 

    18 #ifndef __MMF_PCM16_TO_ALAW_HW_DEVICE_H__

    19 #define __MMF_PCM16_TO_ALAW_HW_DEVICE_H__

    20 #include <mmf/server/mmfswcodecwrapper.h>

    21 #include "MMFAudioCodec.h"

    22 #include <mmfcodec/mmfaudiospcm16toalawcodec.h>

    23 

    24 const TInt KPCM16ToALawSrcBufferSize  = 0x2000;

    25 const TInt KPCM16ToAlawSinkBufferSize = 0x1000;

    26 

    27 /*

    28 *

    29 * class CMMFPcm16ToAlawHwDevice 

    30 *

    31 */

    32 class CMMFPcm16ToAlawHwDevice : public CMMFSwCodecWrapper

    33 	{

    34 public:

    35 	static  CMMFPcm16ToAlawHwDevice* NewL();

    36 	virtual CMMFSwCodec& Codec();

    37     ~CMMFPcm16ToAlawHwDevice(); 

    38 private:

    39 	void ConstructL();

    40 	};

    41 

    42 /*

    43 *

    44 * class CMMFPcm16ToALawCodec coverts PCM to ALaw

    45 *  

    46 */

    47 class CMMFPcm16ToALawCodec : public CMMFSwCodec

    48 	{

    49 public:

    50 	virtual TCodecProcessResult ProcessL(const CMMFBuffer& aSource, CMMFBuffer& aDest);

    51 	virtual TUint SourceBufferSize() {return KPCM16ToALawSrcBufferSize;};

    52 	virtual TUint SinkBufferSize() {return KPCM16ToAlawSinkBufferSize;};

    53 private:

    54 	TBool CheckPreconditions( const CMMFDataBuffer* aSrcBuffer, CMMFDataBuffer* aDestBuffer );

    55 private:

    56 	TMMFAudioSPcm16ToAlawCodec  iPcm16ToALaw;

    57 	};

    58 

    59 #endif //__MMF_PCM16_TO_ALAW_HW_DEVICE_H__