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_PCMU8_HW_DEVICE_H__

    19 #define __MMF_PCM16_TO_PCMU8_HW_DEVICE_H__

    20 

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

    22 #include "MMFAudioCodec.h"

    23 

    24 #include "MMFAudioS16ToU8PcmCodec.h"

    25 

    26 const TInt KPCM16ToPCMU8SourceBufferSize = 0x2000;

    27 const TInt KPCM16ToPCMU8SinkBufferSize = 0x1000; //sink buffer length is half source

    28 

    29 /*

    30 *

    31 * class CMMFPcm16ToPcmU8HwDevice

    32 *

    33 */

    34 class CMMFPcm16ToPcmU8HwDevice : public CMMFSwCodecWrapper

    35 	{

    36 public:

    37 	static  CMMFPcm16ToPcmU8HwDevice* NewL();

    38 	virtual CMMFSwCodec& Codec();

    39 	~CMMFPcm16ToPcmU8HwDevice(); 

    40 private:

    41 	void ConstructL();

    42 	};

    43 

    44 /*

    45 *

    46 * class CMMFPcm16ToPcmU8Codec converts Pcm16 to Pcm unsigned 8 bit

    47 *

    48 */

    49 class CMMFPcm16ToPcmU8Codec : public CMMFSwCodec

    50 	{

    51 public:

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

    53 	virtual TUint SourceBufferSize() {return KPCM16ToPCMU8SourceBufferSize;};

    54 	virtual TUint SinkBufferSize() {return KPCM16ToPCMU8SinkBufferSize;};

    55 private:

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

    57 private:

    58 	TMMFAudioS16ToU8PcmCodec iAudioS16ToU8Pcm ;

    59 	};

    60 

    61 #endif //__MMF_PCMS16_TO_PCMS8_HW_DEVICE_H__

    62