mmlibs/mmfw/src/Plugin/AudioInput/MmfAudioInput.cpp
changeset 0 40261b775718
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mmlibs/mmfw/src/Plugin/AudioInput/MmfAudioInput.cpp	Tue Feb 02 01:56:55 2010 +0200
@@ -0,0 +1,770 @@
+// Copyright (c) 2002-2009 Nokia Corporation and/or its subsidiary(-ies).
+// All rights reserved.
+// This component and the accompanying materials are made available
+// under the terms of "Eclipse Public License v1.0"
+// which accompanies this distribution, and is available
+// at the URL "http://www.eclipse.org/legal/epl-v10.html".
+//
+// Initial Contributors:
+// Nokia Corporation - initial contribution.
+//
+// Contributors:
+//
+// Description:
+//
+
+#include "MmfAudioInput.h"
+#include <ecom/implementationproxy.h>
+#include <mmf/server/mmfformat.h>
+#include <mmf/plugin/mmfaudioiointerfaceuids.hrh>
+
+
+void Panic(TInt aPanicCode)
+	{
+	_LIT(KMMFAudioInputPanicCategory, "MMFAudioInput");
+	User::Panic(KMMFAudioInputPanicCategory, aPanicCode);
+	}
+
+/**
+Static standard SymbianOS 2 phase constuction method.
+
+Constucts this audio device.
+
+@return A pointer to a MDataSource returned on successful construction.
+*/
+MDataSource* CMMFAudioInput::NewSourceL()
+	{
+	CMMFAudioInput* self = new (ELeave) CMMFAudioInput ;
+	CleanupStack::PushL(self);
+	self->ConstructL();
+	CleanupStack::Pop();
+	return  STATIC_CAST( MDataSource*, self );
+	}
+
+/**
+Standard SymbianOS ConstructL.
+
+Used to initialise member varibles with device specific behaviour.
+*/
+void CMMFAudioInput::ConstructL()
+	{
+	iDataTypeCode = KMMFFourCCCodePCM16;
+	iActiveSchedulerWait = new(ELeave) CActiveSchedulerWait;
+	}
+
+/**
+Standard SymbianOS destructor.
+*/
+CMMFAudioInput::~CMMFAudioInput()
+	{
+	delete iActiveSchedulerWait;
+	if (iMMFDevSound)
+		{
+		iMMFDevSound->Stop();
+		delete iMMFDevSound;
+		}
+	}
+
+
+/**
+Overridable constuctor specific to this datasource.
+
+@param  aInitData
+        The initialisation data.
+*/
+void CMMFAudioInput::ConstructSourceL( const TDesC8& /*aInitData*/ ) 
+	{
+	}
+
+/**
+@deprecated
+
+Gets audio from hardware device abstracted MMFDevsound (not used).
+
+@param  aBuffer
+        The data to read in from a Hardware Device
+@param  aConsumer
+        The MDataSink consuming the data contained in aBuffer.
+*/
+void CMMFAudioInput::HWFillBufferL(CMMFBuffer* /*aBuffer*/, MDataSink* /*aConsumer*/)
+	{
+	}
+
+
+/**
+Gets audio from MMFDevsound.
+
+@pre
+iMMFDevSound must be loaded.
+
+@param  aBuffer
+        The data to read in from a Devsound device.
+@param  aConsumer
+        The MDataSink consuming the data contained in aBuffer.
+@param  aMediaId
+        Type of data supplied - currently ignored.
+*/
+void CMMFAudioInput::FillBufferL(CMMFBuffer* aBuffer, MDataSink* aConsumer, TMediaId /* aMediaId */)
+	{
+	iConsumer = aConsumer;
+
+	if (!iMMFDevSound)
+		Panic(EMMFAudioInputDevSoundNotLoaded);
+	
+	if ((iState == EPaused) && (iPausePending != EFalse) && (iFirstBufferRequested) )
+  		{
+  		User::Leave(KErrNotReady);
+  		}
+
+	if ((aBuffer != NULL) && (!CMMFBuffer::IsSupportedDataBuffer(aBuffer->Type())))
+		User::Leave(KErrNotSupported);
+
+	if (aConsumer == NULL)
+		User::Leave(KErrArgument);
+
+	//this is a one-shot "prime" funtion for MMFDevSound as first buffer is uninitialised
+	if (!iFirstBufferRequested)
+		{
+		iMMFDevSound->RecordInitL();
+		iFirstBufferRequested = ETrue;
+		return;
+		}
+
+	if (iState != EDevSoundReady && iState != EPaused)
+		{
+		User::Leave(KErrNotReady);
+		}
+
+	iMMFDevSound->RecordData();
+	}
+
+/**
+Indicates the data sink has emptied the buffer.
+
+Called by the data path's MDataSink when it has emptied the buffer.
+
+The default implementation is empty.
+
+@param  aBuffer
+        The data buffer that has been emptied (not used).
+*/
+void CMMFAudioInput::BufferEmptiedL(CMMFBuffer* /*aBuffer*/)
+	{
+	}
+
+
+/**
+Tests whether a source buffer can be created.
+
+The default imlpementation returns true.
+
+@return	A boolean indicating if the buffer can be made. ETrue if the buffer can be created, false
+        otherwise.
+*/
+TBool CMMFAudioInput::CanCreateSourceBuffer()
+	{
+	return ETrue;
+	}
+
+/**
+Creates a source buffer.
+
+Intended for asynchronous usage (buffers supplied by Devsound device)
+
+@param  aMediaId
+		The Media ID. Not used in the default implementation.
+@param  aReference
+        A boolean indicating if MDataSource owns the buffer. ETrue if it does, EFalse if it does 
+        not.
+
+@return The buffer created (this will always be NULL when asychronous).
+*/
+CMMFBuffer* CMMFAudioInput::CreateSourceBufferL(TMediaId /*aMediaId*/, TBool &aReference)
+	{
+	CMMFDataBuffer* buf = NULL;
+
+	aReference = ETrue; // This is a reference from DevSound
+	return buf;
+	}
+
+/**
+Creates a source buffer.
+
+Intended for synchronous usage.
+
+@param  aMediaId
+        The Media ID. Not used in the default implementation.
+
+@return The buffer created
+*/
+CMMFBuffer* CMMFAudioInput::CreateSourceBufferL(TMediaId /*aMediaId*/)
+	{
+	CMMFDataBuffer* buf = CMMFDataBuffer::NewL(KAudioInputDefaultFrameSize);
+	return buf;
+	}
+
+
+/**
+Primes the source.
+
+This is a virtual function that each derived class must implement, but may be left blank for
+default behaviour.
+
+Overridable PrimeL method. Additional Prime method specific to this DataSource.
+*/
+void CMMFAudioInput::SourcePrimeL()
+	{
+	iState = EDevSoundReady;
+	}
+
+/**
+Pauses the source.
+
+This is a virtual function that each derived class must implement, but may be left blank for default 
+behaviour.
+
+Overridable PauseL method. Additional Pause method specific to this DataSource.
+*/
+void CMMFAudioInput::SourcePauseL()
+	{
+	if (iState == EDevSoundReady)
+		{//not waiting on a buffer being played so stop devsound now
+		iState = EPaused;
+		if (iFirstBufferRead)
+			{
+			if (!iMMFDevSound)
+				Panic(EMMFAudioInputDevSoundNotLoaded);
+			else
+				iMMFDevSound->Pause();
+			}
+		else
+			iPausePending = ETrue; // Wait for recording to get started.
+		}
+	//else if Devsound isn't ready then no point in stopping it
+	}
+
+
+/**
+Stops the source.
+
+This is a virtual function that each derived class must implement, but may be left blank for default 
+behaviour.
+
+Overridable StopL method. Additional Stop method specific to this DataSource.
+*/
+void CMMFAudioInput::SourceStopL()
+	{
+	iStopped = ETrue;
+	// This is done in Audio Output as well, not sure whether its needed here or not.
+	// Pause will be called before SourceStopL() and pause will take care of closing
+	// DevSound
+	if (iState == EDevSoundReady  || iState == EPaused)
+		{//not waiting on a buffer being played so stop devsound now
+		iState = EIdle;
+		if (iFirstBufferRequested)
+			{
+			if (!iMMFDevSound)
+				Panic(EMMFAudioInputDevSoundNotLoaded);
+			else
+				{
+				iMMFDevSound->Stop();
+				}
+
+			iFirstBufferRequested = EFalse;
+			iFirstBufferRead = EFalse;
+			}
+		}
+	//else if Devsound isn't ready then no point in stopping it
+	}
+
+/**
+Plays the source.
+
+This is a virtual function that each derived class must implement, but may be left blank for default
+behaviour.
+
+Overridable PlayL method. Additional Play method specific to this DataSource.
+*/
+void CMMFAudioInput::SourcePlayL()
+	{
+	}
+
+/**
+Logs on the source thread.
+
+Thread specific initialization procedure for this device. Runs automatically on thread construction.
+
+@param  aEventHandler
+        The event handler.
+
+@return An error code indicating if the function call was successful. KErrNone on success, otherwise
+        another of the system-wide error codes.
+*/
+TInt CMMFAudioInput::SourceThreadLogon(MAsyncEventHandler& aEventHandler)
+	{
+	iEventHandler = &aEventHandler;
+	TInt err = KErrNone;
+	if (!iDevSoundLoaded)
+		TRAP(err, LoadL());
+	return err;
+	}
+
+/**
+Logs off the source thread.
+
+Thread specific destruction procedure for this device. Runs automatically on thread destruction.
+*/
+void CMMFAudioInput::SourceThreadLogoff()
+	{
+	if(iMMFDevSound)
+		{
+		iMMFDevSound->Stop();
+		delete iMMFDevSound;
+		iMMFDevSound = NULL;
+		}
+	iDevSoundLoaded = EFalse;
+	iState = EIdle;
+	}
+
+/*
+@internaTechnology
+
+@pre
+dev sound should be created and loaded.
+*/
+void CMMFAudioInput::ConfigDevSoundL()
+	{
+	//[precondition dev sound created ]
+	ASSERT( iMMFDevSound );
+
+	// Query DevSound capabilities and Try to use DevSound sample rate and 
+	// mono/stereo capability
+	TMMFCapabilities devSoundCaps = iMMFDevSound->Capabilities();
+	// get current config
+	TMMFCapabilities devSoundConfig = iMMFDevSound->Config();
+
+	// Default PCM16
+	devSoundConfig.iEncoding = EMMFSoundEncoding16BitPCM;
+
+	// 1 = Monophonic and 2 == Stereo
+	if (((iSinkChannels == 1) && (devSoundCaps.iChannels & EMMFMono)) ||
+		((iSinkChannels == 2) && (devSoundCaps.iChannels & EMMFStereo)))
+		devSoundConfig.iChannels = iSinkChannels;
+
+
+	// Check for std sample rates.
+	if ((iSinkSampleRate == 96000) && (devSoundCaps.iRate & EMMFSampleRate96000Hz))
+		devSoundConfig.iRate = EMMFSampleRate96000Hz;
+	else if ((iSinkSampleRate == 88200) && (devSoundCaps.iRate & EMMFSampleRate88200Hz))
+		devSoundConfig.iRate = EMMFSampleRate88200Hz;
+	else if ((iSinkSampleRate == 64000) && (devSoundCaps.iRate & EMMFSampleRate64000Hz))
+		devSoundConfig.iRate = EMMFSampleRate64000Hz;
+	else if ((iSinkSampleRate == 48000) && (devSoundCaps.iRate & EMMFSampleRate48000Hz))
+		devSoundConfig.iRate = EMMFSampleRate48000Hz;
+	else if ((iSinkSampleRate == 44100) && (devSoundCaps.iRate & EMMFSampleRate44100Hz))
+		devSoundConfig.iRate = EMMFSampleRate44100Hz;
+	else if ((iSinkSampleRate == 32000) && (devSoundCaps.iRate & EMMFSampleRate32000Hz))
+		devSoundConfig.iRate = EMMFSampleRate32000Hz;
+	else if ((iSinkSampleRate == 24000) && (devSoundCaps.iRate & EMMFSampleRate24000Hz))
+		devSoundConfig.iRate = EMMFSampleRate24000Hz;
+	else if ((iSinkSampleRate == 22050) && (devSoundCaps.iRate & EMMFSampleRate22050Hz))
+		devSoundConfig.iRate = EMMFSampleRate22050Hz;
+	else if ((iSinkSampleRate == 16000) && (devSoundCaps.iRate & EMMFSampleRate16000Hz))
+		devSoundConfig.iRate = EMMFSampleRate16000Hz;
+	else if ((iSinkSampleRate == 12000) && (devSoundCaps.iRate & EMMFSampleRate12000Hz))
+		devSoundConfig.iRate = EMMFSampleRate12000Hz;
+	else if ((iSinkSampleRate == 11025) && (devSoundCaps.iRate & EMMFSampleRate11025Hz))
+		devSoundConfig.iRate = EMMFSampleRate11025Hz;
+	else if ((iSinkSampleRate == 8000) && (devSoundCaps.iRate & EMMFSampleRate8000Hz))
+		devSoundConfig.iRate = EMMFSampleRate8000Hz; 
+	else 
+		{
+		// pick the maximum sample rate available
+		if (devSoundCaps.iRate & EMMFSampleRate96000Hz)
+			devSoundConfig.iRate = EMMFSampleRate96000Hz;
+		else if (devSoundCaps.iRate & EMMFSampleRate88200Hz)
+			devSoundConfig.iRate = EMMFSampleRate88200Hz;
+		else if (devSoundCaps.iRate & EMMFSampleRate64000Hz)
+			devSoundConfig.iRate = EMMFSampleRate64000Hz;
+		else if (devSoundCaps.iRate & EMMFSampleRate48000Hz)
+			devSoundConfig.iRate = EMMFSampleRate48000Hz;
+		else if (devSoundCaps.iRate & EMMFSampleRate44100Hz)
+			devSoundConfig.iRate = EMMFSampleRate44100Hz;
+		else if (devSoundCaps.iRate & EMMFSampleRate32000Hz)
+			devSoundConfig.iRate = EMMFSampleRate32000Hz;
+		else if (devSoundCaps.iRate & EMMFSampleRate24000Hz)
+			devSoundConfig.iRate = EMMFSampleRate24000Hz;
+		else if (devSoundCaps.iRate & EMMFSampleRate22050Hz)
+			devSoundConfig.iRate = EMMFSampleRate22050Hz;
+		else if (devSoundCaps.iRate & EMMFSampleRate16000Hz)
+			devSoundConfig.iRate = EMMFSampleRate16000Hz;
+		else if (devSoundCaps.iRate & EMMFSampleRate12000Hz)
+			devSoundConfig.iRate = EMMFSampleRate12000Hz;
+		else if (devSoundCaps.iRate & EMMFSampleRate11025Hz)
+			devSoundConfig.iRate = EMMFSampleRate11025Hz;
+		else if (devSoundCaps.iRate & EMMFSampleRate8000Hz)
+			devSoundConfig.iRate = EMMFSampleRate8000Hz;
+		else
+			ASSERT(EFalse); // if we don't support any sample rates, there is not much we can do
+		
+		}
+
+	iMMFDevSound->SetConfigL(devSoundConfig);
+	}
+
+/**
+Negotiates with the sink.
+
+Called if the source's setup depends on sink.
+
+@param  aSink
+        The Data sink. Takes an MDataSink reference so a DataSource can negotiate with this
+        MDataSource.
+*/
+void CMMFAudioInput::NegotiateSourceL(MDataSink& aSink)
+	{
+	if (aSink.DataSinkType() == KUidMmfFormatEncode) 
+		{//sink is a clip so for now set sink settings to match sink
+		iSinkSampleRate = ((CMMFFormatEncode&)aSink).SampleRate(); 
+		iSinkChannels = ((CMMFFormatEncode&)aSink).NumChannels();
+		iSinkFourCC.Set(aSink.SinkDataTypeCode(TMediaId(KUidMediaTypeAudio)));
+
+		// if the sink's sample rate is undefined, try to obtain and use a
+		// default sample rate from the sink. If this is zero, use 8K
+		if (iSinkSampleRate == 0)
+			{
+			iSinkSampleRate = ((CMMFFormatEncode&)aSink).GetDefaultSampleRate(); 
+			if (iSinkSampleRate == 0)
+				iSinkSampleRate = 8000;
+			}
+		
+		}
+
+	if (iMMFDevSound == NULL)
+  		User::Leave(KErrNotReady);
+
+	TMMFState prioritySettingsState = iPrioritySettings.iState; //should be EMMFStateRecording
+	//to use the GetSupportedOutputDatatypes but we'll save it just in case it's not
+	iPrioritySettings.iState = EMMFStateRecording; //if playing does not support any output data types
+	RArray<TFourCC> supportedDataTypes;
+	//note Output data types becuase if we are recording audio ie audio input
+	//the data is sent as an output from DevSound
+	TRAPD(err, iMMFDevSound->GetSupportedOutputDataTypesL(supportedDataTypes, iPrioritySettings));
+	iPrioritySettings.iState = prioritySettingsState;
+	if (err == KErrNone)
+		{
+		if (supportedDataTypes.Find(iSinkFourCC) == KErrNotFound)
+			{//the source fourCC code could not be found in the list of 
+			//data types supported by the Devsound therefor default to pcm16
+			iDataTypeCode = KMMFFourCCCodePCM16;	
+			}
+		else
+			{
+			//the DevSound does support the same datatype as the source 
+			//so set the fourcc to that of the source
+			iDataTypeCode = iSinkFourCC;
+			}
+		}
+	supportedDataTypes.Close();
+	if (err == KErrNotSupported)
+		{//if the Devsound does not support the GetSupportedOutputDataTypesL method
+		//then assume that the DevSound is pcm16 only
+		iDataTypeCode = KMMFFourCCCodePCM16;	
+		}
+	else if (err != KErrNone) //we had a real leave error from GetSupportedOuputDataTypesL
+		{
+		User::Leave(err);
+		}
+
+    // Prevent defect when SourcePrimeL is called before NegotiateSourceL()
+	// since characterization is ambiguous
+    if(iState == EDevSoundReady)
+      {
+      iState = EIdle;
+      }
+
+  	// moved from LoadL - fix for DEF037168 - AD
+	iMMFDevSound->InitializeL(*this, iDataTypeCode, EMMFStateRecording);
+
+	// In some implementations InitializeComplete is sent
+	// in context, so check before starting activeSchedulerWait.
+	if (iState != EDevSoundReady)
+		{
+		iInitializeState = KRequestPending;
+		iActiveSchedulerWait->Start();
+		}		
+	User::LeaveIfError(iInitializeState);
+
+	iMMFDevSound->SetPrioritySettings(iPrioritySettings);
+
+	// Attempt to configure DevSound to the same settings as the sink.
+	// Need to do this after calling CMMFDevSound::InitializeL() as
+	// this sets up the device capabilities 
+	// (returned by iMMFDevSound->Capabilities()).
+	ConfigDevSoundL();
+	}
+
+/**
+Sets the source's priority settings.
+
+@param  aPrioritySettings
+        The source priority settings. Takes enumerations to determine audio record priority. Higher 
+        numbers mean high priority (can interrupt lower priorities).
+*/
+void CMMFAudioInput::SetSourcePrioritySettings(const TMMFPrioritySettings& aPrioritySettings)
+	{
+	iPrioritySettings = aPrioritySettings;
+	if (!iMMFDevSound)
+		Panic(EMMFAudioInputDevSoundNotLoaded);
+	else
+		iMMFDevSound->SetPrioritySettings(iPrioritySettings);
+	}
+
+
+/**
+Gets the data type code for the source specified by the media ID.
+
+@param  aMediaId
+        An optional parameter to specifiy a specific stream when the datasource contains more than
+        one stream of data.
+
+@return The 4CC of the data supplied by this source.
+*/
+TFourCC CMMFAudioInput::SourceDataTypeCode(TMediaId /*aMediaId*/)
+	{
+	return iDataTypeCode;
+	}
+
+/**
+Sets the data type code for the source.
+
+@param  aSourceFourCC
+        The 4CC of the data supplied by this source.
+@param  aMediaId
+        The Media ID. An optional parameter to specifiy specific stream when datasource contains
+        more than one stream of data.
+
+@return An error code indicating if the function call was successful. KErrNone on success, otherwise
+        another of the system-wide error codes.
+*/
+TInt CMMFAudioInput::SetSourceDataTypeCode(TFourCC aSourceFourCC, TMediaId /*aMediaId*/)
+	{
+	iDataTypeCode = aSourceFourCC;
+	return KErrNone;
+	}
+
+/**
+Gets the number of bytes played.
+
+@return	The number of bytes played. If 16-bit divide this number returned by 2 to get word length.
+*/
+TInt CMMFAudioInput::BytesPlayed()
+	{
+	if (!iMMFDevSound)
+		Panic(EMMFAudioInputDevSoundNotLoaded);
+	return iMMFDevSound->SamplesPlayed();
+	}
+
+/**
+Returns the sound device.
+
+@pre
+Dev Sound should be loaded.
+
+Accessor function exposing public CMMFDevsound methods.
+
+@return A reference to a CMMFDevSound objector.
+*/
+CMMFDevSound& CMMFAudioInput::SoundDevice()
+	{
+	if (!iMMFDevSound)
+		{
+		Panic(EMMFAudioInputDevSoundNotLoaded);
+		}
+	return *iMMFDevSound;
+	}
+
+
+/**
+@deprecated
+
+This method should not be used - it is provided to maintain SC with v7.0s.
+
+@param  aAudioType
+        The 4CC of the data supplied by this source.
+*/
+void CMMFAudioInput::SetDataTypeL(TFourCC aAudioType)
+	{
+	if (aAudioType != KMMFFourCCCodePCM16)
+		{
+		User::Leave(KErrNotSupported);
+		}
+	}	
+
+
+/**
+@deprecated
+
+This method should not be used - it is provided to maintain SC with v7.0s.
+
+@return The 4CC of the data supplied by this source.
+*/
+TFourCC CMMFAudioInput::DataType() const
+	{
+	return KMMFFourCCCodePCM16;
+	}
+
+
+/**
+Loads audio device drivers and initialise this device.
+*/
+void CMMFAudioInput::LoadL()
+	{
+	//[ do all the work that can fail first
+	// before we modify the internal state ]
+
+	iMMFDevSound = CMMFDevSound::NewL();
+	iFirstBufferRequested = EFalse;
+	iFirstBufferRead = EFalse;
+	if (iState != EDevSoundReady) 
+		{
+		iState = EIdle;
+		}
+
+	iDevSoundLoaded = ETrue;
+
+	//[ assert dev sound has been constructed]
+	ASSERT( iMMFDevSound );
+	ASSERT( iDevSoundLoaded );
+    ASSERT( !iFirstBufferRead );
+	}
+
+void CMMFAudioInput::DeviceMessage(TUid /*aMessageType*/, const TDesC8& /* aMsg */)
+	{
+	}
+
+void CMMFAudioInput::InitializeComplete(TInt aError)
+	{
+	if (aError == KErrNone)
+		{
+		iState = EDevSoundReady;
+		}
+
+	if(iInitializeState == KRequestPending)
+		{
+		iInitializeState = aError;
+		iActiveSchedulerWait->AsyncStop();
+		}
+	}
+
+	
+/**
+ToneFinished MMFDevSoundObserver - should never get called.
+*/
+void CMMFAudioInput::ToneFinished(TInt /*aError*/)
+	{
+	//we should never get here during a record session!
+	__ASSERT_DEBUG(EFalse,Panic(EMMFAudioInputPanicToneFinishedNotSupported));
+	}
+
+
+/**
+BuffferToBeEmptied MMFDevSoundObserver
+Called when stopped due to error.
+*/
+void CMMFAudioInput::BufferToBeEmptied(CMMFBuffer* aBuffer)
+	{
+	iDevSoundBuf = aBuffer;
+
+	if (iFirstBufferRequested)
+		{
+		if (iPausePending)
+			{
+			aBuffer->SetLastBuffer(ETrue);
+			iPausePending = EFalse;
+			}
+
+#ifdef _DEBUG
+		TRAPD(err, iConsumer->BufferFilledL(aBuffer));
+		__ASSERT_DEBUG(!err, Panic(err));
+#else
+		TRAP_IGNORE(iConsumer->BufferFilledL(aBuffer));
+#endif
+
+		iFirstBufferRead = ETrue;
+		}
+	}	
+
+
+/**
+RecordError MMFDevSoundObserver
+Called when stopped due to error.
+*/
+void CMMFAudioInput::RecordError(TInt aError)
+	{
+	//[  two event categories will be used
+	// which mirrors the datapath response ]
+
+	//[ record the error ]
+	iMMFDevsoundError = aError;
+	TMMFEvent event( KMMFEventCategoryPlaybackComplete, aError);
+	
+	//[ send the event to the client.
+	SendEventToClient(event);    
+	
+	// clear flags if there is an error.
+	iPausePending = EFalse;
+
+	//[ we are not going to stop devsound ]
+	}
+
+
+/**
+BufferToBeFilled MMFDevSoundObserver - should never get called.
+*/
+void CMMFAudioInput::BufferToBeFilled(CMMFBuffer* /*aBuffer*/)
+	{
+	//we should never get here during a play session!
+	__ASSERT_DEBUG(EFalse, Panic(EMMFAudioInputPanicPlayerDataUsedNotSupported));
+	}
+
+
+/**
+PlayError MMFDevSoundObserver - should never get called.
+*/
+void CMMFAudioInput::PlayError(TInt /*aError*/)
+	{
+	//we should never get here during a record session!
+	__ASSERT_DEBUG(EFalse, Panic(EMMFAudioInputPanicPlayErrorNotSupported));
+	}
+
+
+/**
+ConvertError MMFDevSoundObserver - should never get called.
+*/
+void CMMFAudioInput::ConvertError(TInt /*aError*/)
+	{
+	}
+
+
+void CMMFAudioInput::SendEventToClient(const TMMFEvent& aEvent)
+	{
+	iEventHandler->SendEventToClient(aEvent);
+	}
+
+// _________________________________________________________________________
+// Exported proxy for instantiation method resolution
+// Define the interface UIDs
+
+const TImplementationProxy ImplementationTable[] = 
+	{
+		IMPLEMENTATION_PROXY_ENTRY(KMmfUidAudioInputInterface,	CMMFAudioInput::NewSourceL)
+	};
+
+EXPORT_C const TImplementationProxy* ImplementationGroupProxy(TInt& aTableCount)
+	{
+	aTableCount = sizeof(ImplementationTable) / sizeof(TImplementationProxy);
+
+	return ImplementationTable;
+	}
+