MCL/sf/app/videotelephony: comparison vtprotocolsstub/inc/mvtprotocolhandler.h

equal deleted inserted replaced

--1:000000000000
+:ed9695c8bcbe
+/*
+* Copyright (c) 2008 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:  Video Telephony Protocol interface
+*
+*/
+#ifndef MVTENGMEDIAHANDLER_H
+#define MVTENGMEDIAHANDLER_H
+//  INCLUDES
+#include <e32base.h>
+#include <mmfdatabuffer.h>
+#include <mmfutilities.h>
+#include <mmfcontrollerframework.h>
+typedef TInt TVtCommandId;
+typedef TInt TVtCommandStatus;
+typedef TDesC8 TVtMIMEType;
+const TUid KVTUidYUVFrameBuffer = {0xFFFFFF0d};
+const TInt KVtUidDataSrcPrime	= 0xFFFFFF08;
+const TInt KVtUidDataSrcPlay	= 0xFFFFFF09;
+const TInt KVtUidDataSrcPause	= 0xFFFFFF0A;
+const TInt KVtUidDataSrcStop	= 0xFFFFFF0B;
+_LIT8(KVtVideoMIMETypeYUV420, "/video/x-pv/raw/yuv420");
+enum TVt3G324MSupported
+{
+EVt3G324MMissing,
+EVt3G324MSupported
+};
+enum TVtConfigType
+{
+EVtH324Config,
+EVtVideoEncoderConfig
+};
+enum TVtCommandType {
+EVtCommandInit,
+EVtCommandGetSDKInfo,
+EVtCommandGetProtocolState = 3,
+EVtCommandReset,
+EVtCommandAddDataSource = 6,
+EVtCommandRemoveDataSource,
+EVtCommandAddDataSink,
+EVtCommandRemoveDataSink,
+EVtCommandConnect,
+EVtCommandDisconnect,
+EVtCommandPause,
+EVtCommandResume,
+EVtCommandGetProtocolInterface =20,
+EVtCommandDeleteProtocolInterface,
+EVtCommandCancelAllCommands
+};
+enum TVtIndicationType
+{
+EVtIndicationVideoSpatialTamporalTradeOffCommand,
+EVtIndicationVideoSpatialTamporalTradeOffIndication,
+EVtIndicationUserInputCapability = 6,
+EVtIndicationIncomingTrack = 41,
+EVtIndicationOutgoingTrack,
+EVtIndicationDisconnect,
+EVtIndicationClosingTrack,
+EVtIndicationCloseTrack,
+EVtIndicationPauseTrack,
+EVtIndicationResumeTrack
+};
+enum TVtMediaType
+{
+EVtAudio = 1,
+EVtVideo,
+EVtControl,
+EVtData,
+EVtUserInput,
+EVtMediaNone
+};
+enum TVtAudioOutputControlCommand
+{
+	  EVtAudioOutputControlGetMaxVolume,
+	  EVtAudioOutputControlGetVolume,
+	  EVtAudioOutputControlSetVolume,
+	  EVtAudioOutputControlGetBalance,
+	  EVtAudioOutputControlSetBalance
+	  };
+const TUint8 EVtIncoming = 1;
+enum TUserInputType
+{
+EVtUiiDTFM,
+EVtUiiAlphaNumeric
+};
+struct TVtInitInfo
+{
+TBool iAMRWBOn;
+TBool iDisableMpeg4;
+};
+struct TVtIndicationEvent
+{
+public:
+/**
+* Constructor.
+*/
+TVtIndicationEvent(TInt aEventType, const TUint8 *aLocalBuffer) : iEventType(aEventType), iLocalBuffer(aLocalBuffer)
+{}
+public:
+TInt iEventType;
+const TUint8 *iLocalBuffer;
+};
+struct TVtCommandResponse
+{
+public:
+/**
+* Constructor.
+*/
+TVtCommandResponse(TVtCommandType aCmdType, TInt aCmdId, TInt iCmdStatus) : iCmdType(aCmdType), iCmdId(aCmdId), iCmdStatus(iCmdStatus)
+{}
+public:
+TVtCommandType iCmdType;
+TInt iCmdId;
+TInt iCmdStatus;
+};
+struct TVtErrorEvent
+{
+public:
+/**
+* Constructor.
+*/
+TVtErrorEvent(TInt aEventType) : iEventType(aEventType) {}
+public:
+TInt iEventType;
+};
+struct TVtMMFDataBuffer
+{
+public:
+/**
+* Constructor.
+*/
+TVtMMFDataBuffer(CMMFBuffer* aMmfBuffer,TSize  aFrameSize, TPtr8& aPtr) : iMmfBuffer(aMmfBuffer), iFrameSize(aFrameSize), iPtr(aPtr) {}
+/**
+* Get the YUV frame size.
+* @return The frame size, in pixels
+*/
+TSize GetFrameSize() {return iFrameSize;}
+/**
+* Get MMF buffer.
+* @return the MMF buffer
+*/
+CMMFBuffer* GetMMFBuffer() {return iMmfBuffer;}
+/**
+* Get MMF buffer.
+* @return the MMF buffer
+*/
+const CMMFBuffer* GetMMFBuffer() const {return iMmfBuffer;}
+/**
+*  @return Returns a reference to the data buffer
+**/
+TPtr8& Data() {return iPtr;}
+/**
+*  @return Returns the frame size of the contained buffer.
+**/
+const TSize GetFrameSize() const {return iFrameSize;}
+/**
+*  @return Returns a reference to the data buffer
+**/
+const TPtr8& Data() const {return iPtr;}
+private:
+CMMFBuffer* iMmfBuffer;
+TSize  iFrameSize;
+TPtr8&  iPtr;
+};
+class MVTVideoInput
+{
+public:
+/**
+* Set the video frame format.  This must be from the list of supported formats.
+* @param "aFormat" The mime string describing the video frame format.
+* @exception Can leave with one of the system wide error codes
+*/
+virtual void SetFormatL(const TDesC8& aFormat) {}
+/**
+* Set the video frame rate.  This must be within the range of supported frame rates
+* for the current frame size.
+* @param "aFrameRate" The video frame rate to set.
+* @exception Can leave with one of the system wide error codes
+*/
+virtual void SetFrameRateL(TReal32 aFrameRate) {}
+/**
+* Set the video frame size
+* @param "aSize" The video frame size, in pixels
+* @exception Can leave with one of the system wide error codes
+*/
+virtual void SetVideoFrameSizeL(const TSize& aSize) {}
+/**
+* Get the video frame size
+* @param "aSize" The video frame size, in pixels
+* @exception Can leave with one of the system wide error codes
+*/
+virtual void GetVideoFrameSizeL(TSize& aSize) const {}
+/**
+* This API returns multimedias type supported by the data source/sink -
+* Audio, Video, Data etc.  Each supported type is indicated by a MIME type structure.
+* @return
+**/
+virtual const RArray<TDesC8* >& GetMultimediaTypesL() const {}
+};
+class MVTVideoOutput
+{
+public:
+/**
+*  Sets the data format using MIME string.
+*  @param aFormat The format as a MIME string.
+**/
+virtual void SetFormatL(const TDesC8& aFormat) {}
+/**
+* Set the video frame size
+* @param "aSize" The video frame size, in pixels
+* @exception Can leave with one of the system wide error codes
+**/
+virtual void SetVideoFrameSizeL(const TSize& aSize) {}
+/**
+* Get the video frame size
+* @param "aSize" The video frame size, in pixels
+* @exception Can leave with one of the system wide error codes
+**/
+virtual void GetVideoFrameSizeL(TSize& aSize) const {}
+/**
+* This API returns multimedias type supported by the data source/sink -
+* Audio, Video, Data etc.  Each supported type is indicated by a MIME type structure.
+* @return
+**/
+virtual const RArray<TDesC8* >& GetMultimediaTypesL() const {}
+};
+//This class is empty
+class MVTAudioSource
+{
+};
+//This class is empty
+class MVTAudioSink
+{
+};
+class MVTVideoSource;
+class MVTVideoSink : public MVTVideoOutput
+{
+public:
+/**
+* Constructor.
+*/
+MVTVideoSink(TUid aType): iDataSinkType(aType) {}
+/**
+* Method called by a data source to request the data sink to empty aBuffer of data.
+*
+* This is a pure virtual function that each derived class must implement.
+* This method is used when a data sink is passively waiting for requests from a supplier ie a data source
+* to empty a buffer.  The data sink must call the BufferEmptiedL member on aSupplier when it has emptied
+* the buffer of it's data - the data sink can either make this callback synchronously or asynchronously.
+*
+* @param   "aBuffer"
+*          The full buffer that needs emptying of it's data
+*
+* @param   "aSupplier"
+*          The data source that supplied the data. The data sink needs this to make the BufferEmptiedL
+*          callback on aSupplier to indicate to the data source that the data sink has finished with the buffer.
+*
+* @param   "aMediaId"
+*          This identifies the type of media eg audio or video and the stream id.
+*          This parameter is required in cases where the source can supply data
+*          of more than one media type and/or multiple strams of data
+*/
+virtual void EmptyBufferL(
+TVtMMFDataBuffer aDataBuffer,
+MVTVideoSource* aSupplier,
+TMediaId aMediaId ) {}
+/**
+* Method called by a data source to pass back an filled buffer to the sink
+*
+* This is a pure virtual function that each derived class must implement.
+* This method is used as the callback when the data sink actively requests a supplier ie a data source
+* to fill a buffer by calling the data sources FillBufferL.
+* When the data sink gets this callback it knows that the buffer has been filled and is ready to be emptied
+*
+* @param   "aBuffer"
+*          The buffer that has been filled by a data source and is now available for processing
+*/
+virtual void BufferFilledL( CMMFBuffer* aBuffer ) = 0;
+/**
+* Method to indicate whether the data sink can create a buffer.
+*
+* This is a pure virtual function that each derived class must implement.
+*
+* @return  ETrue if the data sink can create a buffer else EFalse
+*/
+virtual TBool CanCreateSinkBuffer() {return EFalse;}
+/**
+* Returns a buffer created by the data sink
+*
+* This is a pure virtual function that each derived class must implement.
+*
+* @param   "aMediaId"
+*          This identifies the type of media eg audio or video and the stream id.
+*          This parameter is required in cases where the source can supply data
+*          of more than one media type and/or multiple strams of data.
+*
+* @param   "aReference"
+*          This must be written to by the method to indicate whether the created buffer is
+*          a 'reference' buffer.  A 'reference' buffer is a buffer that is owned by the sink
+*          and should be used in preference to the source buffer provided the source buffer
+*          is also not a reference buffer.
+* .
+* @return  The created buffer
+*/
+virtual CMMFBuffer* CreateSinkBufferL(
+TMediaId aMediaId,
+TBool &aReference ) {return NULL;}
+/**
+* Method to 'logon' the data sink to the same thread that sink will be consuming data in.
+*
+* This method may be required as the thread that the data sink was created in is not always
+* the same thread that the data transfer will take place in.  Therefore any thread specific
+* initialisation needs to be performed in the SinkThreadLogon rather than in the creation
+* of the data sink.
+*
+* This is a virtual function that a derrived data sink can implement if any thread specific
+* initialisation is required and/or the data sink can create any asynchronous events.
+*
+*
+* @param   "aEventHandler"
+*          This is an MAsyncEventHandler to handle asynchronous events that occur during the
+*          transfer of multimedia data.  The event handler must be in the same thread as the data transfer
+*          thread - hence the reason it is passed in the SinkThreadLogon as opposed to say the constructor.
+*
+*
+* @return  KErrNone if successful, otherwise a system wide error code.
+*/
+virtual TInt SinkThreadLogon( MAsyncEventHandler& aEventHandler ) {return KErrNone;}
+/**
+* Method to 'logoff' the data sink from the same thread that sink consumes data in.
+*
+* This method may be required as the thread that the data sink is deleted in may not be
+* the same thread that the data transfer took place in.  Therefore any thread specific
+* releasing of resources needs to be performed in the SinkThreadLogoff rather than in the destructor
+*
+* This is a virtual function that a derrived data sink can implement if any thread specific
+* releasing of resources is required.
+*/
+virtual void SinkThreadLogoff() {}
+/**
+* Method to 'prime' the data sink
+*
+* This is a virtual function that a derrived data sink can implement if
+* any data sink specific 'priming' is required
+*/
+virtual TInt SinkPrimeL() {return 0;}
+/**
+* Method to 'play' the data sink
+*
+* This is a virtual function that a derrived data sink can implement if
+* any data sink specific action is required prior to 'playing'ie the start of data transfer
+*/
+virtual TInt SinkPlayL() {return 0;}
+/**
+* Method to 'pause' the data sink
+*
+* This is a virtual function that a derrived data sink can implement if
+* any data sink specific action is required to 'pause'
+*/
+virtual TInt SinkPauseL() {return 0;}
+/**
+* Method to 'stop' the data sink
+*
+* This is a virtual function that a derrived data sink can implement if
+* any data sink specific action is required to 'stop'
+*/
+virtual TInt SinkStopL() {return 0;}
+private:
+TUid iDataSinkType;
+};
+class MVTVideoSource : public MVTVideoInput
+{
+public:
+/**
+* Constructor.
+*/
+MVTVideoSource(TUid aType): iDataSourceType(aType) {}
+/**
+* Method called by a data sink to request the data source to fill aBuffer with data.
+*
+* This is a pure virtual function that each derived class must implement.
+* This method is used when a data source is passively waiting for requests from a consumer ie a data sink
+* to fill a buffer.  The data source must call the BufferFilledL member on aConsumer when it has filled
+* the buffer with data - the data source can either make this callback synchronously or asynchronously.
+*
+* @param   "aBuffer"
+*          The buffer that needs filling with data
+*
+* @param   "aConsumer"
+*          The data sink that consumes the data. The data source needs this to make the BufferFilledL
+*          callback on aConsumer when the data source has completed filling the aBuffer.
+*
+* @param   "aMediaId"
+*          This identifies the type of media eg audio or video and the stream id.
+*          This parameter is required in cases where the source can supply data
+*          of more than one media type and/or multiple strams of data eg a multimedia file
+*/
+virtual void FillBufferL(
+CMMFBuffer* aBuffer,
+MVTVideoSink* aConsumer,
+TMediaId aMediaId ) {}
+/**
+* Method called by a data sink to pass back an emptied buffer to the source
+*
+* This is a pure virtual function that each derived class must implement.
+* This method is used as the callback when the data source actively requests a consumer ie a data sink
+* to empty a buffer by calling the data sinks EmptyBufferL.
+* When the data source gets this callback it knows that the buffer has been emptied and can be reused
+*
+* @param   "aBuffer"
+*          The buffer that has been emptied by a data sink and is now available for reuse
+*/
+virtual void BufferEmptiedL( CMMFBuffer* aBuffer ) = 0;
+/**
+* Method to indicate whether the data source can create a buffer.
+*
+* This is a pure virtual function that each derived class must implement.
+*
+* @return  ETrue if the data source can create a buffer else EFalse
+*/
+virtual TBool CanCreateSourceBuffer() {return EFalse;}
+/**
+* Returns a buffer created by the data source
+*
+* This is a pure virtual function that each derived class must implement.
+*
+* @param   "aMediaId"
+*          This identifies the type of media eg audio or video and the stream id.
+*          This parameter is required in cases where the source can supply data
+*          of more than one media type and/or multiple strams of data eg a multimedia file
+*
+* @param   "aReference"
+*          This must be written to by the method to indicate whether the created buffer is
+*          a 'reference' buffer.  A 'reference' buffer is a buffer that is owned by the source
+*          and should be used in preference to the sink buffer provided the sink buffer
+*          is also not a reference buffer
+* .
+* @return  The created buffer
+*/
+virtual CMMFBuffer* CreateSourceBufferL(
+TMediaId aMediaId,
+TBool &aReference ) {return NULL;}
+/**
+* Returns a buffer created by the data source
+*
+* This is a virtual function that a derived class can implement.
+* This can be used in preference to the above CreateSourceBufferL method in cases where
+* the source buffer creation has a dependancy on the sink buffer
+*
+* @param   "aMediaId"
+*          This identifies the type of media eg audio or video and the stream id.
+*          This parameter is required in cases where the source can supply data
+*          of more than one media type and/or multiple strams of data eg a multimedia file
+*
+* @param   "aSinkBuffer"
+*          The sink buffer the nature of which may influence the creation of the source buffer
+*
+* @param   "aReference"
+*          This must be written to by the method to indicate whether the created buffer is
+*          a 'reference' buffer.  A 'reference' buffer is a buffer that is owned by the source
+*          and should be used in preference to the sink buffer provided the sink buffer is not a reference buffer
+* .
+* @return  The created buffer
+*/
+virtual CMMFBuffer* CreateSourceBufferL(
+TMediaId aMediaId,
+CMMFBuffer& aSinkBuffer,
+TBool &aReference ) {return NULL;}
+/**
+* Method to 'logon' the data source to the same thread that source will be supplying data in.
+*
+* This method may be required as the thread that the data source was created in is not always
+* the same thread that the data transfer will take place in.  Therefore any thread specific
+* initialisation needs to be performed in the SourceThreadLogon rather than in the creation
+* of the data source.
+*
+* This is a virtual function that a derrived data source can implement if any thread specific
+* initialisation is required and/or the data source can create any asynchronous events.
+*
+*
+* @param   "aEventHandler"
+*          This is an MAsyncEventHandler to handle asynchronous events that occur during the
+*          transfer of multimedia data.  The event handler must be in the same thread as the data transfer
+*          thread - hence the reason it is passed in the SourceThreadLogon as opposed to say the constructor.
+*
+*
+* @return  KErrNone if successful, otherwise a system wide error code.
+*/
+virtual TInt SourceThreadLogon( MAsyncEventHandler& aEventHandler ) {return KErrNone;}
+/**
+* Method to 'logoff' the data source from the same thread that source supplies data in.
+*
+* This method may be required as the thread that the data source is deleted in may not be
+* the same thread that the data transfer took place in.  Therefore any thread specific
+* releasing of resources needs to be performed in the SourceThreadLogoff rather than in the destructor
+*
+* This is a virtual function that a derrived data source can implement if any thread specific
+* releasing of resources is required.
+*/
+virtual void SourceThreadLogoff() {}
+/**
+* Method to 'prime' the data source
+*
+* This is a virtual function that a derrived data source can implement if
+* any data source specific 'priming' is required
+*/
+virtual TInt SourcePrimeL() {return 0;}
+/**
+* Method to 'play' the data source
+*
+* This is a virtual function that a derrived data source can implement if
+* any data source specific action is required prior to 'playing'ie the start of data transfer
+*/
+virtual TInt SourcePlayL() {return 0;}
+/**
+* Method to 'pause' the data source
+*
+* This is a virtual function that a derrived data source can implement if
+* any data source specific action is required to 'pause'
+*/
+virtual TInt SourcePauseL() {return 0;}
+/**
+* Method to 'stop' the data source
+*
+* This is a virtual function that a derrived data source can implement if
+* any data source specific action is required to 'stop'
+*/
+virtual TInt SourceStopL() {return 0;}
+private:
+TUid iDataSourceType;
+};
+class MCommServer
+{
+};
+class MVtProtocolCommand
+{
+public:
+enum TVtProtocolState
+{
+EIdle,
+EInitializing,
+ESetup,
+EConnecting,
+EConnected,
+EDisconnecting,
+EResetting
+};
+};
+class MVtProtocolHandler
+{
+public:
+/**
+* Handle an event that has been generated.
+*
+* @param "aResponse"  "The response to a previously issued command."
+*/
+	      virtual void HandleSessionCommandEventL(const TVtCommandResponse& aResponse) = 0;
+	      /**
+	       * Handle an informational event that has been generated.
+	       *
+	       * @param "aEvent" "The event to be handled."
+	       */
+	      virtual void HandleSessionInformationalEventL(const TVtIndicationEvent& aEvent) = 0;
+/**
+	       * Handle an error event that has been generated.
+	       *
+	       * @param "aEvent" "The event to be handled."
+	       */
+	      virtual void HandleSessionErrorEventL(const TVtErrorEvent& aEvent) = 0;
+	      /**
+	      *  Signals completion of the audio output control command.
+	      *  @param aId The command id of the completed command.
+	      *  @param aCmd The command type.
+	      *  @param aContextData The context data passed in with the command.
+	      *  @param aStatus The command completion status.
+	      **/
+	      virtual void HandleAudioOutputControlCommandComplete(TInt aId, TVtAudioOutputControlCommand aCmd, TAny *aContextData ,TInt aStatus) = 0;
+	      /**
+	       * Handle an event that has been generated.
+*
+	       * @param "aResponse"  "The response to a previously issued command."
+	       */
+	      virtual void HandleVideoEncoderCommandCompletedL(const TVtCommandResponse& aResponse) = 0;
+	      /**
+	       * Handle an event that has been generated.
+*
+	       * @param "aEvent" "The event to be handled."
+	       */
+	      virtual void HandleVideoEncoderInformationalEventL(const TVtIndicationEvent& aEvent) = 0;
+/**
+	       * Handle an event that has been generated.
+*
+* @param "aResponse"  "The response to a previously issued command."
+	       */
+	      virtual void HandleH324MConfigCommandCompletedL(const TVtCommandResponse& aResponse) = 0;
+	      /**
+	       * Handle an event that has been generated.
+*
+	       * @param "aEvent" "The event to be handled."
+	       */
+	      virtual void HandleH324MConfigInformationalEventL(const TVtIndicationEvent& aEvent) = 0;
+	      virtual ~MVtProtocolHandler() {}
+};
+class MVtSessionCommand : public MVtProtocolCommand
+{
+public:
+/**
+* This function is valid only in the EIdle state.  It is a no-op when
+* invoked in any other state.  It causes the protocol to transition
+* to the ESetup state.  The terminal remains in the EInitializing state during
+* the transition.
+*
+*
+* @param aInitInfo
+*         A reference to a TVtInitInfo structure which set Mona on and off
+*
+* @leave   This method can leave with one of the following error codes
+*          KErrNoMemory if the SDK failed to allocate memory during this operation
+* @returns A unique command id for asynchronous completion
+**/
+virtual TInt InitProtocolL(TVtInitInfo& aInitInfo) = 0;
+/**
+* For an incoming track (MVTVideoSink) this function  pauses sending
+* media to the sink (output device) and stops the sink.  It then does the protocol
+* negotiations with the remote terminal to pause the logical channel for
+* the specified track.
+*
+* For outgoing, it pauses the sending of media from the source and calls Stop() on the
+* source.  It also performs any necessary protocol negotiations with the remote terminal.
+* EVtCommandPause will be sent to the observer when the processing completes.
+*
+* @returns A unique command id for asynchronous completion
+**/
+virtual TInt PauseVideoL(MVTVideoSource& aDataSource) = 0;
+virtual TInt PauseVideoL(MVTVideoSink& aDataSink) = 0;
+virtual TInt PauseAudioL(MVTAudioSource& aAudioSource) = 0;
+/**
+* Resume a previously paused incoming or outgoing track.  For incoming,
+* this function starts resumes playing out the media to the appropriate
+* sink based on the current settings.  For outgoing it resumes encoding
+* and sending media from the source.
+* EVtCommandResume will be invoked will be invoked on the observer when the processing completes.
+*
+* @returns A unique command id for asynchronous completion
+**/
+virtual TInt ResumeVideoL(MVTVideoSource& aDataSource) = 0;
+virtual TInt ResumeVideoL(MVTVideoSink& aDataSink) = 0;
+virtual TInt ResumeAudioL(MVTAudioSource& aAudioSource) = 0;
+/**
+* This function is valid only in the ESetup and EInitializing state.  It is a
+* no-op when invoked in the EIdle state
+*
+* It causes the protocol to transition back to the EIdle state.  The
+* terminal remains in the EResetting state during the transition.
+*
+* While resetting, the protocol de-allocates all resources resources that
+* had been previously allocated.  When it completes, ResetComplete is called
+* and the protocol reverts to the EIdle state.
+*
+* @leave   This method can leave with one of the following error codes
+*          KErrNoMemory if the SDK failed to allocate memory during this operation
+* @returns A unique command id for asynchronous completion
+**/
+virtual TInt ResetProtocolL() = 0;
+/**
+* This function can be invoked only in the ESetup state.  The terminal starts connecting with the remote
+* terminal based on the specified options and capabilities.
+* The EVtCommandConnect command completion event will be passed to the observer
+* when connect completes.
+* Details about the negotiated session may be obtained by calling the GetSessionParamsL API.
+* GetSessionParamsL may be called after call setup is started to get the list of available channels
+* and their capabilities.
+* Incoming tracks may be opened before ConnectL completes and will be indicated via the
+* EVtIndicationIncommingTrack event.
+*
+* @param aComm
+*         An optional pointer to a comm server to provide comm source and sink end-points.
+* @returns A unique command id for asynchronous completion
+**/
+virtual TInt ConnectToProtocolL(MCommServer* aComm) = 0;
+/**
+* Allows an application to provide a media source to be associated with a logical channel
+* of communication with the peer.  Sources should be added after the EVtIndicationOutgoingTrack
+* indication is received for a newly established logical channel.  The media type and
+* channel id associated with the logical channel are specified as part of the indication.
+* This function accepts a MVtVideoSource which provides additional functionality
+* for advertizing capability and exposing configuration APIs.
+* Data sources could be of the following types:
+* a)raw media sources like camera, microphone etc.
+* b)sources of compressed data like file, gateway component etc.
+*
+* @param aChannelId
+*          Indicates the channel id to be associated with this source.
+* @param aDataSource
+*          reference to the data source
+* @leave   This method can leave with one of the following error codes
+*          KErrNotSupported if the format of the sources/sinks is incomtible with what the SDK can handle
+*          KErrNoMemory if the SDK failed to allocate memory during this operation
+* @return A unique command id for asynchronous completion
+*/
+virtual TInt AddVideoSourceL(const TUint aChannelId, MVTVideoSource &aDataSource) = 0;
+virtual TInt AddAudioSourceL(const TUint aChannelId, MVTAudioSource &aDataSource) = 0;
+/**
+* Allows an application to provide a media sink for rendering an incoming media bitstream in a
+* logical channel of communication with the peer.
+* AddDataSinkL can be called only for established incoming logical channels identified by a unique
+* channel id.
+* Regular incoming channels are established by the peer and are
+* indicated using the EVtIndicationIncomingTrack indication.
+* This function takes in PV extension to MVtVideoSink or MVtAudioSink which provides additional functionality
+* for advertizing capability and exposing configuration APIs.
+* EVtCommandAddDataSink event is sent to the observer on completion of this call.
+*
+* @param aChannelId
+*          Indicates the channel id to be associated with this sink.
+* @param aDataSink The data sink to be added
+*
+* @return A unique command id for asynchronous completion
+**/
+virtual TInt AddVideoSinkL(const TUint aChannelId, MVTVideoSink &aDataSink) = 0;
+virtual TInt AddAudioSinkL(const TUint aChannelId, MVTAudioSink &aDataSink) = 0;
+/**
+* This API is to allow the user to cancel all pending requests.  The current request being
+* processed, if any, will also be aborted.
+* EVtCommandCancelAllCommands will be passed to the command observer on completion.
+* @returns A unique command id for asynchronous completion
+**/
+virtual TInt CancelAllCommandsL( ) = 0;
+/**
+* The Disconnect call is valid only when invoked in the EConnecting, and
+* EConnected states.  It causes the terminal to transition to the
+* EDisconnecting state.  All the media tracks both incoming and outgoing
+* will be closed on invoking Disconnect. On completion, the terminal
+* goes to the ESetup state.
+*
+* It is a no-op when called in any other state.
+*
+* This is an asynchronous request.  The EvtCommandDisconnect event will be
+* sent to the observer when the request processing is complete.  This
+* is the only event the Phone application should expect after calling
+* Disconnect.
+*
+* @returns A unique command id for asynchronous completion
+**/
+virtual TInt DisconnectFromProtocolL() = 0;
+/**
+* This API is to allow for extensibility of the protocol interface.
+* It allows a caller to ask for an instance of a particular interface object to be returned.
+* The mechanism is analogous to the COM IUnknown method.  The interfaces are identified with
+* an interface ID that is a UUID as in DCE and a pointer to the interface object is
+* returned if it is supported.  Otherwise the returned pointer is NULL.
+* @param aType
+* @param aProtocolCommand
+* @exception not_supported
+* leaves if the specified interface id is not supported.
+**/
+virtual TInt GetProtocolInterfaceL(TVtConfigType aType, MVtProtocolCommand*& aProtocolCommand) = 0;
+/**
+* This APIis to be used to release an interface that was previously obtained using
+* QueryInterfaceL.
+* @param aType
+* @param
+* @exception not_supported
+* leaves if the specified interface id is not supported.
+**/
+virtual TInt DeleteProtocolInterfaceL(TVtConfigType aType, MVtProtocolCommand*) = 0;
+/**
+* Destructor.
+*/
+virtual ~MVtSessionCommand() {}
+};
+class MVTUserInput
+{
+public:
+/**
+* @returns Returns the user input type.
+**/
+virtual TUserInputType GetType() = 0;
+virtual ~MVTUserInput() {}
+};
+class MVtH324ConfigCommand : public MVtProtocolCommand
+{
+public:
+/**
+* This API allows the user to specify observers for the 324m interface.
+*
+* @param aHandler     the observer for command status and unsolicited informational events
+**/
+virtual void SetObserverL(MVtProtocolHandler* aHandler) = 0;
+/**
+* Sets the vendor identification data.  This does not cause the stack to issue a vendor identifiation request.
+* Set to NULL to disable sending vendor id.  If set to a valid parameter before Connect, it will cause the stack
+* to automatically send it along with the TCS message.
+* @param cc
+*         T35 Country code
+* @param ext
+*         T35 Extension
+* @param mc
+*         T35 Manufacturer code
+* @param aProduct
+*         Product number
+* @param aVersion
+*         Version number
+**/
+virtual TInt SetVendorId(TUint8 cc, TUint8 ext, TUint32 mc, const TDesC8* aProduct, const TDesC8* aVersion) = 0;
+/**
+* This API allows the user to send a videoTemporalSpatialTradeOff command to the peer.
+* It is a request to the remote encoder to adjust its encoding in accordance with the tradeoff value.
+* A value of 0 indicates a high spatial resolution and a value of 31 indicates a high frame rate.
+* The values from 0 to 31 indicate monotonically a higher frame rate. Actual values do not correspond
+* to precise values of spatial resolution or frame rate.
+*
+**/
+virtual TInt SendVideoTemporalSpatialTradeoffCommand(TUint aLogicalChannel, TUint8 aTradeoff)=0;
+/**
+* This API allows the user to send a videoTemporalSpatialTradeOff command to the peer.
+* It is an indication to the remote decoder that the local encoder has adjusted its encoding parameters
+* according to the tradeoff value.
+* A value of 0 indicates a high spatial resolution and a value of 31 indicates a high frame rate.
+* The values from 0 to 31 indicate monotonically a higher frame rate. Actual values do not correspond
+* to precise values of spatial resolution or frame rate.
+*
+**/
+virtual TInt SendVideoTemporalSpatialTradeoffIndication(TUint aLogicalChannel, TUint8 aTradeoff)=0;
+/**
+* This API allows the user to specify the supported resolutions for video for transmit and receive.
+*
+**/
+virtual TInt SetSupportedResolutions( ) = 0;
+/**
+* This API allows the user to set options for fast call setup procedures
+**/
+virtual TInt SetFastCsupOptions( ) = 0;
+/**
+* Causes the protocol to send the specified user input to the remote terminal using
+* control channel.  The user input can be either DTMF ot Alphanumeric
+* @param user_input A pointer to MVTUserInput
+* @returns A unique command id for asynchronous completion
+**/
+virtual TInt SendUserInputMessageL(MVTUserInput& user_input) = 0;
+};
+class MVtVideoConfigCommand : public MVtProtocolCommand
+{
+public:
+/**
+* This API allows the user to specify separate observers for the extension interface.
+*
+* @param aHandler     the observer for unsolicited informational events
+**/
+virtual void SetObserverL(MVtProtocolHandler* aHandler) = 0;
+/**
+* Sets the I-Frame refresh rate of the encoded output.
+*
+* @param aIFrameInterval I-Frame rate in seconds per I-Frame
+* @return True if successful, else false
+*/
+virtual TInt SetIntraFrameInterval(TUint32 aIFrameInterval) = 0;
+/**
+* Requests the encoder to encode the next frame as an I-Frame.  If successful, the next encoded
+* frame will be an I-Frame.
+*
+* @return True for success, else false
+*/
+virtual TInt RequestNextIntraFrame() = 0;
+/**
+* Sets the frame rate of encoded output for the specified layer.
+* @param aFrameRate Frame rate for the specified layer in frames per second.
+* @return True if successful, else false.
+*/
+virtual TInt SetVideoFrameRate(TUint32 aFrameRate) = 0;
+};
+class MVtAudioConfigCommand : public MVtProtocolCommand
+{
+public:
+/**
+* This API allows the user to specify observers for the 324m interface.
+*
+* @param aHandler
+**/
+virtual void SetObserverL(MVtProtocolHandler* aHandler) = 0;
+/**
+* Method to set the playback volume to the specified value.
+*
+* This is a pure virtual function that each derived class must implement.
+* It is also an asynchronous function which will be answered with a callback.
+*
+* @param aNewVolume
+*        An input parameter to hold the value for the requested playback volume.
+*
+* @returns   Returns a command ID that can be used to identify a command completion result with corresponding request.
+*/
+virtual TInt SetAudioVolumeL(TInt aVolume) = 0;
+/**
+* Method to get the maximum valid value for the playback volume.
+*
+* This is a pure virtual function that each derived class must implement.
+* It is also an asynchronous function which will be answered with a callback.
+*
+* @param aMaxVolume
+*        An output parameter to hold the value for the maximum valid playback volume.
+*            Note that the parameter should not be used until the callback indicates that the
+*            method has completed.
+*
+* @returns   Returns a command ID that can be used to identify a command completion result with corresponding request.
+*/
+virtual TInt GetMaxAudioVolumeL(TInt& aMaxVolume) = 0;
+};
+class VTProtocolFactory
+{
+public:
+/**
+* Create one instance.
+*/
+IMPORT_C static MVtSessionCommand* CreateSessionCommandL(MVtProtocolHandler* aProtocolHandler, TBool aEnableProxy, TVt3G324MSupported& a3G324MSupported);
+/**
+* This function allows the application to delete an instance of a terminal
+* and reclaim all allocated resources.  A terminal should be deleted only in
+* the EIdle state.  An attempt to delete a terminal in any other state will
+* result in unpredictable behavior.
+*
+* @param terminal the terminal to be deleted.
+*
+**/
+IMPORT_C static void DeleteSessionCommand( MVtSessionCommand* aSessionCommand );
+/**
+* Creates an instance of a DevSound audio data source.
+*
+* @param None
+*
+* @returns A pointer to the interface
+**/
+IMPORT_C static MVTAudioSource* CreateAudioSource();
+/**
+* Deletes an instance of a DevSound audio data source
+* that was previously created with CreateAudioSource();
+*
+* @param aSource The audio data source to be deleted.
+*
+* @returns status
+**/
+IMPORT_C static TInt DeletAudioSource(MVTAudioSource *aSource);
+/**
+* Creates an instance of a DevSound audio data sink.
+*
+* @param None
+*
+* @returns A pointer to the interface
+**/
+IMPORT_C static MVTAudioSink* CreateAudioSink();
+/**
+* Deletes an instance of a DevSound audio data sink
+* that was previously created with CreateAudioSink();
+*
+* @param The audio data sink to be deleted.
+*
+* @returns status
+**/
+IMPORT_C static TInt DeleteAudioSink(MVTAudioSink *aSink);
+/**
+* Creates an instance of a comm server of a particular name, to be used to
+* initialize the terminal.
+*
+*
+* @returns A pointer to a terminal or leaves if the type is invalid or the system is out of resources
+**/
+IMPORT_C static MCommServer* CreateCommServerL(const TDesC & aName, TBool aEnableBitReversal=EFalse);
+/**
+* This function allows the application to delete an instance of a comm server
+* and reclaim all allocated resources.  A comm server should be deleted only when the
+* protocol is in the EIdle state.  An attempt to delete a comm server in any other state
+* could result in memory corruption within the protocol.  This function will leave  with
+* KErrInUse if the comm server is still in use.  However it will not check the state of the
+* protocol that is using the comm server.
+*
+* @param aCommServer the comm server to be deleted.
+*
+* @returns a status code indicating success or failure
+**/
+IMPORT_C static void DeleteCommServerL(MCommServer* aCommServer);
+/**
+* Create instance.
+* @param aUIITyep
+* @param aTone
+*/
+IMPORT_C static MVTUserInput* CreateUserInputIndication(TUserInputType aUIIType, TUint8 aTone);
+/**
+* Delete instance.
+* @param aUII
+*/
+IMPORT_C static void DeleteUserInputIndication(MVTUserInput* aUII);
+/**
+*
+* @param aAudioSink
+*/
+IMPORT_C static MVtAudioConfigCommand* GetAudioConfigCommandL(MVTAudioSink* aAudioSink);
+};
+#endif
+//  End of File

changeset 0	ed9695c8bcbe
child 14	856ae1b15d98