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os/mm/devsound/sounddevbt/src/Plugin/HwDevice/Audio/MmfBtPcm16ToPcm16HwDevice.cpp
author sl
Tue, 10 Jun 2014 14:32:02 +0200
changeset 1 260cb5ec6c19
permissions -rw-r--r--
Update contrib. 
     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 //

    15 

    16 #include "MmfBtPcm16ToPcm16HwDevice.h"

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

    18 

    19 /**

    20  *

    21  *	Returns the created hw device for passing audio through audio.

    22  *  for the wins implementation this would always be pcm16 although

    23  *  this is effectively a null hw device that will pass any datatype through

    24  *	@return	"CMMFPcm16ToPcm16HwDevice"

    25  *

    26  */

    27 CMMFPcm16ToPcm16HwDevice* CMMFPcm16ToPcm16HwDevice::NewL()

    28 	{

    29     CMMFPcm16ToPcm16HwDevice* self = new (ELeave) CMMFPcm16ToPcm16HwDevice();

    30 	CleanupStack::PushL(self);

    31 	self->ConstructL();

    32 	CleanupStack::Pop(self);

    33 	return self;

    34 	}

    35 

    36 /**

    37  *

    38  *	Second phase constructor.

    39  *

    40  */

    41 void CMMFPcm16ToPcm16HwDevice::ConstructL()

    42 	{

    43     iCodec = new (ELeave) CMMFPcm16ToPcm16Codec();

    44 	static_cast<CMMFPcm16ToPcm16Codec*>(iCodec)->SetHwDevice(this);

    45 	}

    46 

    47 /**

    48 *

    49 * ~CMMFPcm16ToPcm16HwDevice

    50 *

    51 **/

    52 CMMFPcm16ToPcm16HwDevice::~CMMFPcm16ToPcm16HwDevice()

    53 	{

    54 	}

    55 

    56 /**

    57 *

    58 * Codec

    59 * @return CMMFSwCodec&

    60 **/

    61 CMMFSwCodec& CMMFPcm16ToPcm16HwDevice::Codec()

    62 	{

    63 	return *iCodec;

    64 	}

    65 

    66 

    67 

    68 

    69 

    70 /**

    71 *

    72 * ProcessL

    73 * @param aSrc Source Buffer

    74 * @param aDest Destintion Buffer

    75 * @return CMMFSwCodec::TCodecProcessResult

    76 *

    77 **/

    78 CMMFSwCodec::TCodecProcessResult CMMFPcm16ToPcm16Codec::ProcessL(const CMMFBuffer& /*aSource*/, CMMFBuffer& /*aDest*/)

    79 	{//no processing required for null codec

    80 	User::Leave(KErrNotSupported); 

    81 	//to keep compiler happy

    82 	TCodecProcessResult result;

    83 	result.iCodecProcessStatus = TCodecProcessResult::EEndOfData;

    84 	result.iSrcBytesProcessed = 0;

    85 	result.iDstBytesAdded = 0;

    86 	return result;

    87 	};

    88 

    89 

    90 TUint CMMFPcm16ToPcm16Codec::SourceBufferSize()

    91 	{

    92 	if (!iBufferSize) 

    93 		iBufferSize = iHwDevice->CalculateBufferSize();

    94 	return iBufferSize;

    95 	}

    96 

    97 

    98 TUint CMMFPcm16ToPcm16Codec::SinkBufferSize()

    99 	{

   100 	if (!iBufferSize) 

   101 		iBufferSize = iHwDevice->CalculateBufferSize();

   102 	return iBufferSize;

   103 	}

   104 

   105 void CMMFPcm16ToPcm16Codec::SetHwDevice(CMMFPcm16ToPcm16HwDevice* aHwDevice)

   106 	{

   107 	iHwDevice = aHwDevice;

   108 	}

   109 

   110 TUint CMMFPcm16ToPcm16HwDevice::CalculateBufferSize()

   111 	{

   112 	TUint sampleRate = 0;

   113 	TUint channels = 0;

   114 	TInt useBufferOfSize = 0;

   115 	TInt minBufferSize = 0;

   116 	TInt maxBufferSize = 0;

   117 

   118 	if (iPlayCustomInterface)

   119 		{

   120 		sampleRate = iSampleRate;

   121 		channels = iChannels;	

   122 /*		if ((sampleRate) && (channels))

   123 			{

   124 			RMdaDevSound::TSoundFormatsSupportedBuf playFormatsSupported;

   125 			if (iDataPath->Device().Handle())

   126 				{

   127 				iDataPath->Device().PlayFormatsSupported(playFormatsSupported);

   128 				minBufferSize = playFormatsSupported().iMinBufferSize;

   129 				maxBufferSize = playFormatsSupported().iMaxBufferSize;

   130 				}

   131 			else

   132 				{//try to get handle

   133 				TInt err = iDataPath->Device().Open();

   134 				if (err == KErrNone)

   135 					{

   136 					iDataPath->Device().PlayFormatsSupported(playFormatsSupported);

   137 					minBufferSize = playFormatsSupported().iMinBufferSize;

   138 					maxBufferSize = playFormatsSupported().iMaxBufferSize;

   139 					iDataPath->Device().Close();

   140 					}

   141 				}

   142 			}

   143 */		}

   144 	if ((iRecordCustomInterface) && (!sampleRate) && (!channels))

   145 		{ //must be record

   146 		sampleRate = iSampleRate;

   147 		channels = iChannels;

   148 /*		if ((sampleRate) && (channels))

   149 			{//get max and min supported buffer sizes supported by hw

   150 			RMdaDevSound::TSoundFormatsSupportedBuf recordFormatsSupported;

   151 			if (iDataPath->Device().Handle())

   152 				{

   153 				iDataPath->Device().RecordFormatsSupported(recordFormatsSupported);

   154 				minBufferSize = recordFormatsSupported().iMinBufferSize;

   155 				maxBufferSize = recordFormatsSupported().iMaxBufferSize;

   156 				}

   157 			else

   158 				{//try to get handle

   159 				TInt err = iDataPath->Device().Open();

   160 				if (err == KErrNone)

   161 					{

   162 					iDataPath->Device().RecordFormatsSupported(recordFormatsSupported);

   163 					minBufferSize = recordFormatsSupported().iMinBufferSize;

   164 					maxBufferSize = recordFormatsSupported().iMaxBufferSize;

   165 					iDataPath->Device().Close();

   166 					}

   167 				}

   168 			}

   169 */		}

   170 //	else convert so not applicable

   171 

   172 	if ((sampleRate) && (channels))

   173 		{

   174 		// Buffer size = (SampleRate * BytesPerSample * Channels) / 4

   175 		useBufferOfSize = ((sampleRate * 2 * channels)/KDevSoundFramesPerSecond + (KDevSoundDeltaFrameSize-1)) &~ (KDevSoundDeltaFrameSize-1);

   176 		//clamp buffer to desired limits

   177 		if(useBufferOfSize < KDevSoundMinFrameSize) 

   178 			useBufferOfSize = KDevSoundMinFrameSize;

   179 		else if(useBufferOfSize > KDevSoundMaxFrameSize) 

   180 			useBufferOfSize = KDevSoundMaxFrameSize;

   181 

   182 		//clamp buffer to limits of hardware

   183 		if (maxBufferSize)

   184 			{//buffer size limits have been set by sound driver

   185 			 //check we are within the limits

   186 			if(useBufferOfSize < minBufferSize)

   187 				useBufferOfSize = minBufferSize;

   188 			else if(useBufferOfSize > maxBufferSize)

   189 				useBufferOfSize = maxBufferSize;

   190 			}

   191 		}

   192 	else

   193 		{

   194 		useBufferOfSize = KPCM16ToPCM16BufferSize;

   195 		}

   196 

   197 	return useBufferOfSize;

   198 	}
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