sl@0: // Copyright (c) 2003-2009 Nokia Corporation and/or its subsidiary(-ies).
sl@0: // All rights reserved.
sl@0: // This component and the accompanying materials are made available
sl@0: // under the terms of "Eclipse Public License v1.0"
sl@0: // which accompanies this distribution, and is available
sl@0: // at the URL "http://www.eclipse.org/legal/epl-v10.html".
sl@0: //
sl@0: // Initial Contributors:
sl@0: // Nokia Corporation - initial contribution.
sl@0: //
sl@0: // Contributors:
sl@0: //
sl@0: // Description:
sl@0: //
sl@0: 
sl@0: #include "MMFpcm16ToPcm16HwDevice.h"
sl@0: 
sl@0: 
sl@0: /**
sl@0:  *
sl@0:  *	Returns the created hw device for passing audio through audio.
sl@0:  *  for the wins implementation this would always be pcm16 although
sl@0:  *  this is effectively a null hw device that will pass any datatype through
sl@0:  *	@return	"CMMFPcm16ToPcm16HwDevice"
sl@0:  *
sl@0:  */
sl@0: CMMFPcm16ToPcm16HwDevice* CMMFPcm16ToPcm16HwDevice::NewL()
sl@0: 	{
sl@0:     CMMFPcm16ToPcm16HwDevice* self = new (ELeave) CMMFPcm16ToPcm16HwDevice();
sl@0: 	CleanupStack::PushL(self);
sl@0: 	self->ConstructL();
sl@0: 	CleanupStack::Pop(self);
sl@0: 	return self;
sl@0: 	}
sl@0: 
sl@0: /**
sl@0:  *
sl@0:  *	Second phase constructor.
sl@0:  *
sl@0:  */
sl@0: void CMMFPcm16ToPcm16HwDevice::ConstructL()
sl@0: 	{
sl@0:     iCodec = new (ELeave) CMMFPcm16ToPcm16Codec();
sl@0: 	static_cast<CMMFPcm16ToPcm16Codec*>(iCodec)->SetHwDevice(this);
sl@0: 	}
sl@0: 
sl@0: /**
sl@0: *
sl@0: * ~CMMFPcm16ToPcm16HwDevice
sl@0: *
sl@0: **/
sl@0: CMMFPcm16ToPcm16HwDevice::~CMMFPcm16ToPcm16HwDevice()
sl@0: 	{
sl@0: 	}
sl@0: 
sl@0: /**
sl@0: *
sl@0: * Codec
sl@0: * @return CMMFSwCodec&
sl@0: **/
sl@0: CMMFSwCodec& CMMFPcm16ToPcm16HwDevice::Codec()
sl@0: 	{
sl@0: 	return *iCodec;
sl@0: 	}
sl@0: 
sl@0: 
sl@0: 
sl@0: 
sl@0: 
sl@0: /**
sl@0: *
sl@0: * ProcessL
sl@0: * @param aSrc Source Buffer
sl@0: * @param sDest Destintion Buffer
sl@0: * @return CMMFSwCodec::TCodecProcessResult
sl@0: *
sl@0: **/
sl@0: CMMFSwCodec::TCodecProcessResult CMMFPcm16ToPcm16Codec::ProcessL(const CMMFBuffer& /*aSource*/, CMMFBuffer& /*aDest*/)
sl@0: 	{//no processing required for null codec
sl@0: 	User::Leave(KErrNotSupported); 
sl@0: 	//to keep compiler happy
sl@0: 	TCodecProcessResult result;
sl@0: 	result.iCodecProcessStatus = TCodecProcessResult::EEndOfData;
sl@0: 	result.iSrcBytesProcessed = 0;
sl@0: 	result.iDstBytesAdded = 0;
sl@0: 	return result;
sl@0: 	};
sl@0: 
sl@0: 
sl@0: TUint CMMFPcm16ToPcm16Codec::SourceBufferSize()
sl@0: 	{
sl@0: 	if (!iBufferSize) 
sl@0: 		iBufferSize = iHwDevice->CalculateBufferSize();
sl@0: 	return iBufferSize;
sl@0: 	}
sl@0: 
sl@0: 
sl@0: TUint CMMFPcm16ToPcm16Codec::SinkBufferSize()
sl@0: 	{
sl@0: 	if (!iBufferSize) 
sl@0: 		iBufferSize = iHwDevice->CalculateBufferSize();
sl@0: 	return iBufferSize;
sl@0: 	}
sl@0: 
sl@0: void CMMFPcm16ToPcm16Codec::SetHwDevice(CMMFPcm16ToPcm16HwDevice* aHwDevice)
sl@0: 	{
sl@0: 	iHwDevice = aHwDevice;
sl@0: 	}
sl@0: 
sl@0: TUint CMMFPcm16ToPcm16HwDevice::CalculateBufferSize()
sl@0: 	{
sl@0: 	TUint sampleRate = 0;
sl@0: 	TUint channels = 0;
sl@0: 	TInt useBufferOfSize = 0;
sl@0: 	TInt minBufferSize = 0;
sl@0: 	TInt maxBufferSize = 0;
sl@0: 
sl@0: 	if (iPlayCustomInterface)
sl@0: 		{
sl@0: 		sampleRate = iSampleRate;
sl@0: 		channels = iChannels;	
sl@0: 		if ((sampleRate) && (channels))
sl@0: 			{
sl@0: 			RMdaDevSound::TSoundFormatsSupportedBuf playFormatsSupported;
sl@0: 			if (iDataPath->Device().Handle())
sl@0: 				{
sl@0: 				iDataPath->Device().PlayFormatsSupported(playFormatsSupported);
sl@0: 				minBufferSize = playFormatsSupported().iMinBufferSize;
sl@0: 				maxBufferSize = playFormatsSupported().iMaxBufferSize;
sl@0: 				}
sl@0: 			else
sl@0: 				{//try to get handle
sl@0: 				TInt err = iDataPath->Device().Open();
sl@0: 				if (err == KErrNone)
sl@0: 					{
sl@0: 					iDataPath->Device().PlayFormatsSupported(playFormatsSupported);
sl@0: 					minBufferSize = playFormatsSupported().iMinBufferSize;
sl@0: 					maxBufferSize = playFormatsSupported().iMaxBufferSize;
sl@0: 					iDataPath->Device().Close();
sl@0: 					}
sl@0: 				}
sl@0: 			}
sl@0: 		}
sl@0: 	if ((iRecordCustomInterface) && (!sampleRate) && (!channels))
sl@0: 		{ //must be record
sl@0: 		sampleRate = iSampleRate;
sl@0: 		channels = iChannels;
sl@0: 		if ((sampleRate) && (channels))
sl@0: 			{//get max and min supported buffer sizes supported by hw
sl@0: 			MSwSetParamInterface* interface = 
sl@0: 				static_cast<MSwSetParamInterface*>(iDataPath->CustomInterface(KUidSwSetParamInterface));
sl@0: 			if (interface)
sl@0: 				{
sl@0: 				interface->GetBufferSizes(minBufferSize, maxBufferSize);
sl@0: 				}
sl@0: 			}
sl@0: 		}
sl@0: //	else convert so not applicable
sl@0: 
sl@0: 	if ((sampleRate) && (channels))
sl@0: 		{
sl@0: 		// Buffer size = (SampleRate * BytesPerSample * Channels) / 4
sl@0: 		useBufferOfSize = ((sampleRate * 2 * channels)/KDevSoundFramesPerSecond + (KDevSoundDeltaFrameSize-1)) &~ (KDevSoundDeltaFrameSize-1);
sl@0: 		//clamp buffer to desired limits
sl@0: 		if(useBufferOfSize < KDevSoundMinFrameSize) 
sl@0: 			useBufferOfSize = KDevSoundMinFrameSize;
sl@0: 		else if(useBufferOfSize > KDevSoundMaxFrameSize) 
sl@0: 			useBufferOfSize = KDevSoundMaxFrameSize;
sl@0: 
sl@0: 		//clamp buffer to limits of hardware
sl@0: 		if (maxBufferSize)
sl@0: 			{//buffer size limits have been set by sound driver
sl@0: 			 //check we are within the limits
sl@0: 			if(useBufferOfSize < minBufferSize)
sl@0: 				useBufferOfSize = minBufferSize;
sl@0: 			else if(useBufferOfSize > maxBufferSize)
sl@0: 				useBufferOfSize = maxBufferSize;
sl@0: 			}
sl@0: 		}
sl@0: 	else
sl@0: 		{
sl@0: 		useBufferOfSize = KPCM16ToPCM16BufferSize;
sl@0: 		}
sl@0: 
sl@0: 	return useBufferOfSize;
sl@0: 	}
sl@0: 
sl@0: TAny* CMMFPcm16ToPcm16HwDevice::CustomInterface(TUid aInterfaceId)
sl@0: 	{
sl@0: 	// if this is the bitrate interface then
sl@0: 	// we support this natively
sl@0: 	if (aInterfaceId == KUidCustomInterfaceDevSoundBitRate)
sl@0: 		{
sl@0: 		return static_cast<MMMFDevSoundCustomInterfaceBitRate*> (this);
sl@0: 		}
sl@0: 	else
sl@0: 		{
sl@0: 		// otherwise pass the interface call onto the base class
sl@0: 		return CMMFSwCodecWrapper::CustomInterface(aInterfaceId);
sl@0: 		}
sl@0: 	}
sl@0: 
sl@0: void CMMFPcm16ToPcm16HwDevice::GetSupportedBitRatesL(RArray<TInt>& aSupportedBitRates)
sl@0: 	{
sl@0: 	// precondition of needing the datapath
sl@0: 	if (!iDataPath)
sl@0: 		{
sl@0: 		User::Leave(KErrNotReady);
sl@0: 		}
sl@0: 	
sl@0: 	// we only use this interface on the record interface
sl@0: 	if (iRecordCustomInterface)
sl@0: 		{
sl@0: 		MSwInfoInterface* interface = 
sl@0:               static_cast<MSwInfoInterface*>(iDataPath->CustomInterface(KUidSwInfoInterface));
sl@0:         if (interface)
sl@0:               {
sl@0:               RArray<TInt> supportedSampleRates;
sl@0:               CleanupClosePushL(supportedSampleRates);
sl@0:               User::LeaveIfError(interface->GetSupportedSampleRates(supportedSampleRates));
sl@0:               BitRatesFromSampleRatesL(aSupportedBitRates, supportedSampleRates);
sl@0:               CleanupStack::PopAndDestroy(&supportedSampleRates);
sl@0:               }
sl@0:         else
sl@0:             {
sl@0:             User::Leave(KErrNotSupported);
sl@0:             }
sl@0: 		}
sl@0: 	}
sl@0: 
sl@0: void CMMFPcm16ToPcm16HwDevice::BitRatesFromSampleRatesL(RArray<TInt>& aSupportedBitRates, 
sl@0:                                                         const RArray<TInt>& aSupportedSampleRates)
sl@0:     {
sl@0:     for (TInt index=0; index<aSupportedSampleRates.Count(); index++)
sl@0:         {
sl@0:         TInt sampleRate = aSupportedSampleRates[index];
sl@0:         TInt bitRate = sampleRate * iChannels * 16;
sl@0:         aSupportedBitRates.AppendL(bitRate);
sl@0:         }
sl@0:     }
sl@0: 
sl@0: TInt CMMFPcm16ToPcm16HwDevice::BitRateL()
sl@0: 	{
sl@0: 	/*
sl@0: 	inline void GetRecordFormat(TCurrentSoundFormatBuf& aFormat);
sl@0: 	inline TInt SetRecordFormat(const TCurrentSoundFormatBuf& aFormat);
sl@0: 	*/
sl@0: 	TInt bitRate = 0;
sl@0: 	
sl@0: 	// need a number of channels and sample rate
sl@0: 	if (!iSampleRate || !iChannels)
sl@0: 		{
sl@0: 		User::Leave(KErrNotReady);
sl@0: 		}
sl@0: 	
sl@0: 	// should be able to just return sample rate * channels * 16 
sl@0: 	if (iRecordCustomInterface)
sl@0: 		{
sl@0: 		bitRate = iSampleRate * iChannels * 16;	
sl@0: 		}
sl@0: 	return bitRate;
sl@0: 	}
sl@0: 
sl@0: void CMMFPcm16ToPcm16HwDevice::SetBitRateL(TInt aBitRate)
sl@0: 	{
sl@0: 	// need a datapath and number of channels
sl@0: 	if (!iDataPath || (!iChannels))
sl@0: 		{
sl@0: 		User::Leave(KErrNotReady);
sl@0: 		}
sl@0: 	
sl@0: 	// calculate the correct sample rate but don't set it yet
sl@0: 	TInt sampleRate = aBitRate / 16 / iChannels;
sl@0: 	
sl@0: 	// if the datapath is not playing try and make change immediately
sl@0: 	if (iDataPath->State() != CMMFSwCodecDataPath::EPlaying)
sl@0: 		{
sl@0: 		// update the member variable, assume it is picked up on next record.
sl@0: 		iSampleRate = sampleRate;
sl@0: 		}
sl@0: 	}