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_MULAW_TO_PCM16_HW_DEVICE_H__

    19 #define __MMF_MULAW_TO_PCM16_HW_DEVICE_H__

    20 

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

    22 #include "MMFAudioCodecBase.h"

    23 

    24 #include "MMFAudioMuLawToS16PcmCodec.h"

    25 

    26 const TInt KMuLawToCM16SrcBufferSize  = 0x1000;

    27 const TInt KMuLawToCM16SinkBufferSize = 0x2000;

    28 

    29 /*

    30 *

    31 * class CMMFMulawToPcm16CodecHwDevice 

    32 *

    33 */

    34 class CMMFMulawToPcm16CodecHwDevice : public CMMFSwCodecWrapper

    35 	{

    36 public:

    37 	static  CMMFMulawToPcm16CodecHwDevice* NewL();

    38 	virtual CMMFSwCodec& Codec();

    39 	~CMMFMulawToPcm16CodecHwDevice(); 

    40 private:

    41 	void ConstructL();

    42 	};

    43 

    44 /*

    45 *

    46 * class CMMFMulawToPcm16Codec coverts MuLaw to PCM

    47 *  

    48 */

    49 class CMMFMulawToPcm16Codec : public CMMFSwCodec

    50 	{

    51 public:

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

    53 	virtual TUint SourceBufferSize() {return KMuLawToCM16SrcBufferSize;};

    54 	virtual TUint SinkBufferSize() {return KMuLawToCM16SinkBufferSize;};

    55 private:

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

    57 	TInt MulawSampleToPcm(TUint8 aAlaw);

    58 private:

    59 	TMMFAudioMuLawToS16PcmCodec iMulawTo16Pcm;

    60 	};

    61 

    62 #endif //__MMF_MULAW_TO_PCM16_HW_DEVICE_H__