Symaptic: os/mm/devsound/sounddevbt/src/Plugin/HwDevice/Audio/MmfBtPcmU8ToPcm16HwDevice.cpp@260cb5ec6c19

     1 // Copyright (c) 2005-2009 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 //

    16 #include "MmfBtPcmU8ToPcm16HwDevice.h"

    17 #include "../../MmfBtFileDependencyUtil.h"

    19 /**

    20  *

    21  *	Returns the created hw device for unsigned pcm8 to signed pcm16 audio.

    22  *

    23  *	@return	"CMMFPcmU8ToPcm16HwDevice"

    24  *

    25  */

    26 CMMFPcmU8ToPcm16HwDevice* CMMFPcmU8ToPcm16HwDevice::NewL()

    27 	{

    28     CMMFPcmU8ToPcm16HwDevice* self = new (ELeave) CMMFPcmU8ToPcm16HwDevice();

    29 	CleanupStack::PushL(self);

    30 	self->ConstructL();

    31 	CleanupStack::Pop(self);

    32 	return self;

    33 	}

    35 /**

    36  *

    37  *	Second phase constructor.

    38  *

    39  */

    40 void CMMFPcmU8ToPcm16HwDevice::ConstructL()

    41 	{

    42     iCodec = new (ELeave) CMMFPcmU8ToPcm16Codec();

    43 	}

    45 /**

    46 *

    47 * ~CMMFPcmU8ToPcm16HwDevice

    48 *

    49 */

    50 CMMFPcmU8ToPcm16HwDevice::~CMMFPcmU8ToPcm16HwDevice()

    51 	{

    52 	//The codec is deleted in the base class CMMFSwCodecWrapper

    53 	}

    55 /**

    56 *

    57 * Codec

    58 * @return 'CMMFSwCodec&'

    59 *

    60 */

    61 CMMFSwCodec& CMMFPcmU8ToPcm16HwDevice::Codec()

    62 	{

    63 	return *iCodec;

    64 	}

    66 /**

    67 *

    68 * ProcessL

    69 * @param aSource

    70 * @param aDst

    71 * @return 'CMMFSwCodec::TCodecProcessResult'

    72 *

    73 */

    74 CMMFSwCodec::TCodecProcessResult CMMFPcmU8ToPcm16Codec::ProcessL(const CMMFBuffer& aSource, CMMFBuffer& aDest)

    75 	{

    76 	TCodecProcessResult result;

    77 	result.iCodecProcessStatus = 	result.iCodecProcessStatus = TCodecProcessResult::EProcessComplete;

    79 	//convert from generic CMMFBuffer to CMMFDataBuffer

    80 	const CMMFDataBuffer* src = STATIC_CAST(const CMMFDataBuffer*, &aSource);

    81 	CMMFDataBuffer* dst = STATIC_CAST(CMMFDataBuffer*, &aDest);

    83 	//[ check preconditions ]

    84 	if( !CheckPreconditions( src, dst ))

    85 		{

    86 		//[ precondition violation ]

    87 		User::Leave( KErrArgument );

    88 		}

    90 	//we need to cast away CONST even on the source, as the TClass needs a TUint8*

    91 	TUint8* pSrc = CONST_CAST(TUint8*,src->Data().Ptr());

    92 	TUint8* pDst = CONST_CAST(TUint8*,dst->Data().Ptr());

    94 	TInt srcUse = src->Data().Length();

    95 	TInt noSamples = srcUse;

    96 	iAudioU8ToS16Pcm.Convert(pSrc, pDst, noSamples );

    98 	TInt dstBytesAdded = srcUse * 2;

    99 	result.iCodecProcessStatus = TCodecProcessResult::EProcessComplete;

   100 	result.iSrcBytesProcessed  = srcUse;

   101 	result.iDstBytesAdded      = dstBytesAdded;

   103 	dst->Data().SetLength(dstBytesAdded);

   105 	//[ check post conditions ]

   106 	__ASSERT_DEBUG( (src->Position() == 0), TMmfAudioCodecPanicsNameSpace::Panic( 	TMmfAudioCodecPanicsNameSpace::EPostConditionViolation ));

   107 	__ASSERT_DEBUG( (dst->Position() == 0), TMmfAudioCodecPanicsNameSpace::Panic( 	TMmfAudioCodecPanicsNameSpace::EPostConditionViolation ));

   108 	__ASSERT_DEBUG( src->Data().Length() == dst->Data().Length()/2, TMmfAudioCodecPanicsNameSpace::Panic( 	TMmfAudioCodecPanicsNameSpace::EPostConditionViolation )); // 2 here signifies sizeof TInt16

   109 	__ASSERT_DEBUG( dst->Data().Length() % 2 == 0, TMmfAudioCodecPanicsNameSpace::Panic( 	TMmfAudioCodecPanicsNameSpace::EPostConditionViolation )); // pcm output

   111 	return result;

   112 	}

   114 /**

   115 *

   116 * Preconditions

   117 * This methos tests the preconditions of the ProcessL method

   118 * @return TBool ETrue for sucess and EFalse for failure of the preconditions

   119 *

   120 **/

   121 TBool CMMFPcmU8ToPcm16Codec::CheckPreconditions( const CMMFDataBuffer* aSrcBuffer, CMMFDataBuffer* aDestBuffer )

   122 	{

   123 	TBool result = EFalse;

   125 	if(! aSrcBuffer )

   126 		{

   127 		return result;

   128 		}

   130 	if( ! aDestBuffer )

   131 		{

   132 		return result;

   133 		}

   135 	// Check position of src and dest are 0

   136 	if( aSrcBuffer->Position() )

   137 		{

   138 		return result;

   139 		}

   141 	// Check position of src and dest are 0

   142 	if( aDestBuffer->Position() )

   143 		{

   144 		return result;

   145 		}

   147 	// check there are sufficient bytes in the output to consume the input

   148 	if( aSrcBuffer->Data().Length() * 2 > aDestBuffer->Data().MaxLength() )

   149 		{

   150 		return result;

   151 		}

   153 	result = ETrue;  // preconditions have been satisfied

   155 	return result;

   156 	}

author	sl
	Tue, 10 Jun 2014 14:32:02 +0200
changeset 1	260cb5ec6c19
permissions	-rw-r--r--