1 // Copyright (c) 2002-2009 Nokia Corporation and/or its subsidiary(-ies).

     2 // All rights reserved.

     3 // This component and the accompanying materials are made available

     4 // under the terms of "Eclipse Public License v1.0"

     5 // which accompanies this distribution, and is available

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

     7 //

     8 // Initial Contributors:

     9 // Nokia Corporation - initial contribution.

    10 //

    11 // Contributors:

    12 //

    13 // Description:

    14 // MmfBtpcm16ToPcmU8HwDevice.h

    15 // 

    16 //

    17 

    18 #ifndef __MMF_BT_ALAW_TO_PCM16_HW_DEVICE_H__

    19 #define __MMF_BT_ALAW_TO_PCM16_HW_DEVICE_H__

    20 #include <mmfbtswcodecwrapper.h>

    21 #include "MMFAudioCodecBase.h"

    22 #include "MMFAudioALawToS16PcmCodec.h"

    23 

    24 const TInt KALawToCM16SrcBufferSize  = 0x1000;

    25 const TInt KALawToCM16SinkBufferSize = 0x2000;

    26 

    27 /*

    28 *

    29 * CMMFAlawToPcm16CodecHwDevice 

    30 *

    31 */

    32 class CMMFAlawToPcm16CodecHwDevice : public CMMFSwCodecWrapper

    33 	{

    34 public:

    35 	static  CMMFAlawToPcm16CodecHwDevice* NewL();

    36 	virtual CMMFSwCodec& Codec();

    37 	~CMMFAlawToPcm16CodecHwDevice(); 

    38 private:

    39 	void ConstructL();

    40 	};

    41 

    42 /*

    43 *

    44 * class CMMFAlawToPcm16Codec coverts ALaw to PCM

    45 *  

    46 */

    47 class CMMFAlawToPcm16Codec : public CMMFSwCodec

    48 	{

    49 public:

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

    51 	virtual TUint SourceBufferSize() {return KALawToCM16SrcBufferSize;};

    52 	virtual TUint SinkBufferSize() {return KALawToCM16SinkBufferSize;};

    53 private:

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

    55 	TInt AlawSampleToPcm(TUint8 aAlaw);

    56 private:

    57 	TMMFAudioALawToS16PcmCodec iAlawTo16Pcm;

    58 	};

    59 

    60 #endif //__MMF_BT_ALAW_TO_PCM16_HW_DEVICE_H__

    61