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// Copyright (c) 2004-2009 Nokia Corporation and/or its subsidiary(-ies).
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// All rights reserved.
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// This component and the accompanying materials are made available
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// under the terms of "Eclipse Public License v1.0"
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// which accompanies this distribution, and is available
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// at the URL "http://www.eclipse.org/legal/epl-v10.html".
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//
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// Initial Contributors:
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// Nokia Corporation - initial contribution.
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//
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// Contributors:
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//
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// Description:
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//
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/**
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@file
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@internalComponent
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@released
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*/
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#include <avcframe.h>
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#include <remconbeareravrcp.h>
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#include "remconstatusapi.h"
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#include "remconavrcpstatusconverter.h"
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/** Factory function.
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@return Ownership of a new CRemConAvrcpStatusConverter.
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*/
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CRemConAvrcpStatusConverter* CRemConAvrcpStatusConverter::NewL()
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{
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CRemConAvrcpStatusConverter* self = new(ELeave) CRemConAvrcpStatusConverter;
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return self;
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}
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/** Destructor.
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*/
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CRemConAvrcpStatusConverter::~CRemConAvrcpStatusConverter()
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{
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}
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/** Constructor.
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*/
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CRemConAvrcpStatusConverter::CRemConAvrcpStatusConverter()
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{
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}
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/** Called to get a converter interface.
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@param aUid The uid of the desired interface.
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@return An instance of the desired interface, NULL if
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one could not be found.
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*/
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TAny* CRemConAvrcpStatusConverter::GetInterface(TUid aUid)
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{
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TAny* ret = NULL;
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if ( aUid == TUid::Uid(KRemConConverterInterface1) )
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{
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ret = reinterpret_cast<TAny*>(
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static_cast<MRemConConverterInterface*>(this)
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);
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}
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return ret;
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}
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/** Decides whether this converter supports this interface.
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This converter supports only the AVRCP bearer and Status API.
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This function checks whether the Uids provided match AVRCP and
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Status.
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@param aInterfaceData The Uid of the originating RemCon interface.
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@param aBearerUid The Uid of the bearer this data is destined for.
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@return Whether this data can be converted.
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*/
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TBool CRemConAvrcpStatusConverter::SupportedUids(const TUid& aInterfaceUid, const TUid& aBearerUid) const
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{
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return (aInterfaceUid == TUid::Uid(KRemConStatusApiUid) &&
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aBearerUid == TUid::Uid(KRemConBearerAvrcpImplementationUid));
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}
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/** Decides whether this converter supports this interface.
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This converter supports only the AVRCP bearer. That bearer publishes
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interface data in the format of an AV/C frame. This function
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checks that aBearerUid is that of AVRCP, and if so examines the AV/C
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frame in aInterfaceData to see if it is a supported command.
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@param aInterfaceData Data in the format of the bearer identified by
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aBearerUid.
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@param aBearerUid The Uid of the bearer this data originates from.
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@return Whether this data can be converted.
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*/
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TBool CRemConAvrcpStatusConverter::SupportedInterface(const TDesC8& aInterfaceData, const TUid& aBearerUid) const
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{
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TInt supported = EFalse;
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if(aBearerUid == TUid::Uid(KRemConBearerAvrcpImplementationUid))
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{
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AVC::TOpcode opcode = AVC::EPower; // arbitrary initialisation to avoid compiler warning
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TRAPD(err, opcode = CAVCFrame::OpcodeL(aInterfaceData));
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if ( err == KErrNone
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&& ( opcode == AVC::EUnitInfo || opcode == AVC::ESubunitInfo )
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)
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{
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supported = ETrue;
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}
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}
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return supported;
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}
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/** Convert data from the API's form (as we're given it by RemCon) to
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bearer-specific form.
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We only deal with the AVRCP bearer. This requires us to produce a
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CAVCFrame.
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The supported commands are Unit Info and Subunit Info.
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@param aInterfaceUid The Uid of the originating RemCon interface.
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@param aOperationId The id of the operation within the interface.
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@param aData Data in the format defined by the RemCon interface.
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@param aMsgType Whether this is a command or response.
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@param aBearerData On return, an AV/C frame representing the operation.
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*/
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TInt CRemConAvrcpStatusConverter::InterfaceToBearer(TUid aInterfaceUid,
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TUint aOperationId,
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const TDesC8& /*aData*/,
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TRemConMessageType aMsgType,
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TDes8& aBearerData) const
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{
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__ASSERT_ALWAYS(aInterfaceUid.iUid == KRemConStatusApiUid, CRemConAvrcpStatusConverter::Panic(EStatusConverterWrongInterface));
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TInt err = KErrCorrupt;
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switch(aOperationId)
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{
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case ERemConStatusApiUnitInfo:
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{
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if(aMsgType == ERemConCommand)
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{
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CAVCFrame* frame = NULL;
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TRAP(err, frame = UnitInfoL());
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if(!err)
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{
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aBearerData = frame->Data();
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err = KErrNone;
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delete frame;
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}
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}
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else if(aMsgType == ERemConResponse)
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{
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// These should be generated within the bearer
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// as it knows the manufacturer id
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err = KErrNotSupported;
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}
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break;
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}
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case ERemConStatusApiSubunitInfo:
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{
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if(aMsgType == ERemConCommand)
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{
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CAVCFrame* frame = NULL;
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TRAP(err, frame = SubunitInfoL());
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if(!err)
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{
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aBearerData = frame->Data();
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err = KErrNone;
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delete frame;
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}
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}
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else if(aMsgType == ERemConResponse)
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{
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// These should be generated within the bearer
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// as it knows the manufacturer id
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err = KErrNotSupported;
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}
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break;
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}
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default:
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{
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err = KErrNotSupported;
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break;
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}
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}
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return err;
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}
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/** Produce a Unit Info AV/C frame.
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@return A new AV/C frame representing unit info.
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@leave System wide error.
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*/
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CAVCFrame* CRemConAvrcpStatusConverter::UnitInfoL()
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{
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CAVCFrame* frame = CAVCFrame::NewL(AVC::ECommand, AVC::EStatus, AVC::EUnit, AVC::EIgnore);
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frame->Append(TChar(AVC::EUnitInfo));
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frame->Append(TChar(0xff));
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frame->Append(TChar(0xff));
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frame->Append(TChar(0xff));
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frame->Append(TChar(0xff));
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frame->Append(TChar(0xff));
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return frame;
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}
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/** Produce a Subunit Info AV/C frame.
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@return A new AV/C frame representing subunit info.
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@leave System wide error.
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*/
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CAVCFrame* CRemConAvrcpStatusConverter::SubunitInfoL()
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{
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CAVCFrame* frame = CAVCFrame::NewL(AVC::ECommand, AVC::EStatus, AVC::EUnit, AVC::EIgnore);
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frame->Append(TChar(AVC::ESubunitInfo));
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frame->Append(TChar(0x7));
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frame->Append(TChar(0xff));
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frame->Append(TChar(0xff));
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frame->Append(TChar(0xff));
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frame->Append(TChar(0xff));
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return frame;
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}
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/** Convert data from the bearer format to RemCon interface format.
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We only deal with the Status Api. The supported commands are Unit
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Info response and Subunit Info response.
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Support of these commands is mandatory in the targets. In the case
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where a remote sends us something rubbish, we'll just provide our
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client with the default info.
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@param aBearerData An AV/C frame to convert.
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@param aInterfaceUid On return, the Uid of the RemCon interface.
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@param aOperationId On return, the id of the operation within the
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interface.
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@param aMsgType Whether this is a command or response.
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@param aData On return, Data in the format defined by the RemCon interface.
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@return Whether the command was successfully converted.
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*/
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TInt CRemConAvrcpStatusConverter::BearerToInterface(const TDesC8& aBearerData,
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TUid& aInterfaceUid,
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TUint& aOperationId,
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TRemConMessageType& aMsgType,
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TDes8& aData) const
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{
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TInt err = KErrCorrupt;
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switch(aOperationId)
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{
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case ERemConStatusApiUnitInfo:
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{
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if(aMsgType == ERemConCommand)
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{
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// These should be generated within the bearer
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// as it knows the manufacturer id
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err = KErrNotSupported;
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}
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else if(aMsgType == ERemConResponse)
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{
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// We try to parse the data, but if what the remote's sent
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// us is invalid we'll fill in sensible values later
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TRAP(err, SetUnitInfoResponseDataL(aBearerData, aData));
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aInterfaceUid = TUid::Uid(KRemConStatusApiUid);
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aOperationId = ERemConStatusApiUnitInfo;
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if(err == KErrCorrupt)
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{
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// The data is set to the correct length in SetUnitInfoResponseDataL
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// Stick some default data in there
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SetCommandDataFromInt(aData, KRemConStatusApiUnitOffset,
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KRemConStatusApiUnitLength, AVC::EID0);
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SetCommandDataFromInt(aData, KRemConStatusApiUnitTypeOffset,
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KRemConStatusApiUnitTypeLength, AVC::EPanel);
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SetCommandDataFromInt(aData, KRemConStatusApiExtendedUnitTypeOffset,
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KRemConStatusApiExtendedUnitTypeLength, 0);
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SetCommandDataFromInt(aData, KRemConStatusApiVendorIdOffset,
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KRemConStatusApiVendorIdLength, KRemConStatusApiDefaultVendorId);
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err = KErrNone;
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}
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}
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break;
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}
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case ERemConStatusApiSubunitInfo:
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{
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if(aMsgType == ERemConCommand)
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{
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// These should be generated within the bearer
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// as it knows the manufacturer id
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err = KErrNotSupported;
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}
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else if(aMsgType == ERemConResponse)
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{
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// We try to parse the data, but if what the remote's sent
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// us is invalid we'll fill in sensible values later
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TRAP(err, SetSubunitInfoResponseDataL(aBearerData, aData));
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aInterfaceUid = TUid::Uid(KRemConStatusApiUid);
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aOperationId = ERemConStatusApiSubunitInfo;
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if(err == KErrCorrupt)
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{
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// Subunit response data varies in length, so the length
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// set in SetSubunitInfoResponseDataL may be wrong.
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aData.FillZ(KRemConStatusApiPageLength + KRemConStatusApiExtensionLength + KRemConStatusApiDefaultPageDataLength);
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// Stick some default data in there
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SetCommandDataFromInt(aData, KRemConStatusApiPageOffset,
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KRemConStatusApiPageLength, 0);
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SetCommandDataFromInt(aData, KRemConStatusApiExtensionOffset,
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KRemConStatusApiExtensionLength, AVC::EIgnore);
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SetCommandDataFromInt(aData, KRemConStatusApiPageDataOffset,
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KRemConStatusApiDefaultPageDataLength, KRemConStatusApiDefaultPageData);
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err = KErrNone;
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}
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}
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break;
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}
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default:
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{
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err = KErrNotSupported;
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break;
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}
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}
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return err;
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}
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/** Parses command data from the buffer.
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@param aCommandData The buffer from which to read the data.
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@param aVendorId On return, the vendor id
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@param aUnit On return, the unit
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@param aUnitType On return, the unit type
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@param aExtendedUnitType On return, the extended unit type
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@internalComponent
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@released
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*/
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void CRemConAvrcpStatusConverter::SetUnitInfoResponseDataL(const TDesC8& aBearerData,
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TDes8& aRemConData)
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{
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// AVRCP should pass us a sensible sized buffer!
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__ASSERT_ALWAYS(aRemConData.MaxLength() >= KUnitInfoResponseLength, CRemConAvrcpStatusConverter::Panic(EAvrcpPassedTooSmallABuffer));
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// Get rid of any junk
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aRemConData.FillZ(KRemConStatusApiUnitLength + KRemConStatusApiUnitTypeLength
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+ KRemConStatusApiExtendedUnitTypeLength
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+ KRemConStatusApiVendorIdLength);
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// Get unit id if there's enough data for it
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if(aBearerData.Length() < KUnitIdOffset + KUnitIdLength)
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{
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User::Leave(KErrCorrupt);
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}
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TInt unit;
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ReadCommandDataToInt(aBearerData, KUnitIdOffset, KUnitIdLength, unit);
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unit &= KAVCSubunitIDMask;
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SetCommandDataFromInt(aRemConData, KRemConStatusApiUnitOffset,
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KRemConStatusApiUnitLength, unit);
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// Get unit type (maybe extended) if there's enough data
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if(aBearerData.Length() < KUnitTypeOffset + KUnitTypeLength)
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{
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User::Leave(KErrCorrupt);
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}
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TInt unitType;
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ReadCommandDataToInt(aBearerData, KUnitTypeOffset, KUnitTypeLength, unitType);
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unitType &= KAVCSubunitTypeMask;
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unitType >>= KUnitTypeShift;
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SetCommandDataFromInt(aRemConData, KRemConStatusApiUnitTypeOffset,
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KRemConStatusApiUnitTypeLength, unitType);
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TInt unitTypeExtend = 0;
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TInt vendorIdOffset = KVendorIdBaseOffset;
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if(unitType == KUnitTypeExtend)
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{
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// Extended unit type. VendorId is offset by 1
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vendorIdOffset++;
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// Read the next byte if it's there
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if(aBearerData.Length() < KUnitTypeExtendOffset + 1)
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{
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User::Leave(KErrCorrupt);
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}
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ReadCommandDataToInt(aBearerData, KUnitTypeExtendOffset, 1, unitTypeExtend);
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unitTypeExtend <<= 8;
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// Double extended unit type.
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if(unitTypeExtend == KUnitTypeExtendExtend)
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{
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// VendorId is offset by 1
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vendorIdOffset++;
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// Read the next byte
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TInt unitTypeExtendExtend = 0;
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if(aBearerData.Length() < KUnitTypeExtendExtendOffset + 1)
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{
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User::Leave(KErrCorrupt);
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}
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ReadCommandDataToInt(aBearerData, KUnitTypeExtendExtendOffset, 1,
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unitTypeExtendExtend);
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unitTypeExtend |= unitTypeExtendExtend;
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}
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SetCommandDataFromInt(aRemConData, KRemConStatusApiExtendedUnitTypeOffset,
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KRemConStatusApiExtendedUnitTypeLength, unitTypeExtend);
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}
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419 |
// Get vendor id
|
|
420 |
if(aBearerData.Length() < vendorIdOffset + KVendorIdLength)
|
|
421 |
{
|
|
422 |
User::Leave(KErrCorrupt);
|
|
423 |
}
|
|
424 |
TInt vendorId;
|
|
425 |
ReadCommandDataToInt(aBearerData, vendorIdOffset, KVendorIdLength, vendorId);
|
|
426 |
SetCommandDataFromInt(aRemConData, KRemConStatusApiVendorIdOffset,
|
|
427 |
KRemConStatusApiVendorIdLength, vendorId);
|
|
428 |
}
|
|
429 |
|
|
430 |
/** Parses command data from the buffer.
|
|
431 |
|
|
432 |
@param aCommandData The buffer from which to read the data.
|
|
433 |
@param aPage On return, the page
|
|
434 |
@param aExtension On return, the extension
|
|
435 |
@param aPageData On return, the page data
|
|
436 |
|
|
437 |
@internalComponent
|
|
438 |
@released
|
|
439 |
*/
|
|
440 |
void CRemConAvrcpStatusConverter::SetSubunitInfoResponseDataL(const TDesC8& aBearerData,
|
|
441 |
TDes8& aRemConData)
|
|
442 |
{
|
|
443 |
// AVRCP should pass us a sensible sized buffer!
|
|
444 |
__ASSERT_ALWAYS(aRemConData.MaxLength() >= KUnitInfoResponseLength, CRemConAvrcpStatusConverter::Panic(EAvrcpPassedTooSmallABuffer));
|
|
445 |
|
|
446 |
CAVCFrame* frame = CAVCFrame::NewL(aBearerData, AVC::EResponse); //Qualified
|
|
447 |
CleanupStack::PushL(frame);
|
|
448 |
TPtrC8 ptr = frame->Data();
|
|
449 |
|
|
450 |
// Work out how long a buffer we need for the RemCon data.
|
|
451 |
// This is KRemConStatusApiPageLength + KRemConStatusApiExtensionLength
|
|
452 |
// + the length of the page data.
|
|
453 |
// We can work out the length of the page data from the frame -
|
|
454 |
// it's the remainder of the frame after KSubunitPageDataOffset.
|
|
455 |
// This gives us:
|
|
456 |
TInt remConDataLen = KRemConStatusApiPageLength
|
|
457 |
+ KRemConStatusApiPageLength
|
|
458 |
+ (ptr.Length() - KSubunitPageDataOffset);
|
|
459 |
|
|
460 |
if(aRemConData.MaxLength() < remConDataLen)
|
|
461 |
{
|
|
462 |
User::Leave(KErrCorrupt);
|
|
463 |
}
|
|
464 |
|
|
465 |
// Get rid of any junk
|
|
466 |
aRemConData.FillZ(remConDataLen);
|
|
467 |
|
|
468 |
// Get page
|
|
469 |
if(aBearerData.Length() < KSubunitPageOffset + KSubunitPageLength)
|
|
470 |
{
|
|
471 |
User::Leave(KErrCorrupt);
|
|
472 |
}
|
|
473 |
TInt page;
|
|
474 |
ReadCommandDataToInt(aBearerData, KSubunitPageOffset, KSubunitPageLength, page);
|
|
475 |
page &= KSubunitPageMask;
|
|
476 |
SetCommandDataFromInt(aRemConData, KRemConStatusApiPageOffset,
|
|
477 |
KRemConStatusApiPageLength, page);
|
|
478 |
|
|
479 |
// Get extension code
|
|
480 |
if(aBearerData.Length() < KSubunitExtensionOffset + KSubunitExtensionLength)
|
|
481 |
{
|
|
482 |
User::Leave(KErrCorrupt);
|
|
483 |
}
|
|
484 |
TInt extensionCode;
|
|
485 |
ReadCommandDataToInt(aBearerData, KSubunitExtensionOffset, KSubunitExtensionLength,
|
|
486 |
extensionCode);
|
|
487 |
extensionCode &= KSubunitExtensionMask;
|
|
488 |
SetCommandDataFromInt(aRemConData, KRemConStatusApiExtensionOffset,
|
|
489 |
KRemConStatusApiExtensionLength, extensionCode);
|
|
490 |
|
|
491 |
// Get page data
|
|
492 |
TPtrC8 pageDataPtr = aBearerData.Mid(KSubunitPageDataOffset);
|
|
493 |
aRemConData.Replace(KRemConStatusApiPageDataOffset, pageDataPtr.Length(), pageDataPtr);
|
|
494 |
|
|
495 |
CleanupStack::PopAndDestroy(frame);
|
|
496 |
}
|
|
497 |
|
|
498 |
/** Reads command data from the buffer to an int.
|
|
499 |
|
|
500 |
@param aCommandData The buffer from which to read the data.
|
|
501 |
@param aOffset The offset within aCommandData read from.
|
|
502 |
@param aLength The length of data to read. This must not be
|
|
503 |
more than 4.
|
|
504 |
@param aValue On return, the value of the specified data section.
|
|
505 |
|
|
506 |
@internalComponent
|
|
507 |
@released
|
|
508 |
*/
|
|
509 |
void CRemConAvrcpStatusConverter::ReadCommandDataToInt(const TDesC8& aCommandData,
|
|
510 |
TInt aOffset, TInt aLength, TInt& aValue)
|
|
511 |
{
|
|
512 |
__ASSERT_DEBUG(aLength <= 4, CRemConAvrcpStatusConverter::Panic(EStatusConverterDataTooShort));
|
|
513 |
|
|
514 |
aValue = 0;
|
|
515 |
|
|
516 |
for(TInt i = 0 ; i < aLength; i++)
|
|
517 |
{
|
|
518 |
aValue |= aCommandData[aOffset+i]<<(8*i);
|
|
519 |
}
|
|
520 |
}
|
|
521 |
|
|
522 |
/** Set the command data. This overwrites the current
|
|
523 |
contents of the data buffer.
|
|
524 |
|
|
525 |
@param aCommandData The buffer in which to set the data.
|
|
526 |
@param aOffset The offset within aCommandData to set the data.
|
|
527 |
@param aLength The length of data to replace.
|
|
528 |
@param aValue The new value for the replaced data.
|
|
529 |
*/
|
|
530 |
void CRemConAvrcpStatusConverter::SetCommandDataFromInt(TDes8& aCommandData,
|
|
531 |
TInt aOffset, TInt aLength, TInt aValue)
|
|
532 |
{
|
|
533 |
__ASSERT_DEBUG(aLength <= 4, CRemConAvrcpStatusConverter::Panic(EStatusConverterDataTooShort));
|
|
534 |
|
|
535 |
for(TInt i = 0; i < aLength; i++)
|
|
536 |
{
|
|
537 |
aCommandData[aOffset+i] = aValue >> (8*i);
|
|
538 |
}
|
|
539 |
}
|
|
540 |
|
|
541 |
/** Utility Status Converter panic function.
|
|
542 |
|
|
543 |
@param aPanic The panic number.
|
|
544 |
*/
|
|
545 |
void CRemConAvrcpStatusConverter::Panic(TStatusConverterPanic aPanic)
|
|
546 |
{
|
|
547 |
User::Panic(KStatusConverterPanicName, aPanic);
|
|
548 |
}
|
|
549 |
|
|
550 |
//
|
|
551 |
// End of file
|