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_IMAADPCM_HW_DEVICE_H__

    19 #define __MMF_PCM16_TO_IMAADPCM_HW_DEVICE_H__

    20 

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

    22 #include "MMFAudioCodecBase.h"

    23 #include "MMFAudioCodec.h"

    24 #include "MMFAudioPcm16ToImaAdpcmCodec.h"

    25 

    26 const TInt KPCM16ToImaSrcBufferSize  = 0x3F20;

    27 const TInt KPCM16ToImaSinkBufferSize = 0x1000;

    28 const TUint KSourceFrameSize = KImaAdpcmSamplesPerBlock * 2;

    29 const TUint KCodedFrameSize  = KImaAdpcmBlockAlign;

    30 

    31 /*

    32 *

    33 * class CMMFPcm16ToMulawHwDevice 

    34 *

    35 */

    36 class CMMFPcm16ToImaAdpcmHwDevice : public CMMFSwCodecWrapper

    37 	{	

    38 public:

    39 	static  CMMFPcm16ToImaAdpcmHwDevice* NewL();

    40 	virtual CMMFSwCodec& Codec();

    41 	~CMMFPcm16ToImaAdpcmHwDevice(); 

    42 private:

    43 	void ConstructL();

    44 	};

    45 

    46 /*

    47 *

    48 * class CMMFPcm16ToALawCodec coverts Pcm16 to Imaad

    49 *  

    50 */

    51 class CMMFPcm16ToImaAdpcmCodec : public CMMFSwCodec

    52 	{

    53 public:

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

    55 	virtual TUint SourceBufferSize() {return KPCM16ToImaSrcBufferSize;};

    56 	virtual TUint SinkBufferSize() {return   KPCM16ToImaSinkBufferSize;};

    57 private:

    58 	virtual void ResetL();

    59 	void ProcessBuffers(const CMMFDataBuffer& aSource, CMMFDataBuffer& aDestination, CMMFSwCodec::TCodecProcessResult& aResult );

    60 	TBool BuffersStatus( const CMMFDataBuffer* source, const CMMFDataBuffer* destination );

    61 private:

    62 	TMMFAudioPcm16ToImaAdpcmCodec iPcm16ToImaAdpcm;

    63 	TMMFAudioPcm16ToImaAdpcmCodec i16PcmToImaAdpcm;

    64 	TUint iLastFrameNumber;

    65 	};

    66 

    67 #endif //__MMF_PCM16_TO_IMAADPCM_HW_DEVICE_H__