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// Copyright (c) 2007-2010 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 the License "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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// @file hostisochronoustransfers.cpp
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// @internalComponent
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//
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//
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#include "hosttransfers.h"
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#include "OstTraceDefinitions.h"
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#ifdef OST_TRACE_COMPILER_IN_USE
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#include "hostisochronoustransfersTraces.h"
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#endif
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#include <e32debug.h>
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#include <e32test.h>
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extern RTest gtest;
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namespace NUnitTesting_USBDI
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{
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CIsochTransfer::CIsochTransfer(RUsbPipe& aPipe,RUsbInterface& aInterface,TUint16 aMaxPacketSize,
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TInt aMaxNumPackets,MTransferObserver& aObserver,TInt aTransferId)
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: CBaseTransfer(aPipe,aInterface,aObserver,aTransferId),
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iTransferDescriptor(aMaxPacketSize,aMaxNumPackets),
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iMaxPacketSize(aMaxPacketSize)
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{
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OstTraceFunctionEntryExt( CISOCHTRANSFER_CISOCHTRANSFER_ENTRY, this );
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OstTraceExt2(TRACE_NORMAL, CISOCHTRANSFER_CISOCHTRANSFER, "aMaxPacketSize = %d, aMaxNumPackets = %d",aMaxPacketSize, aMaxNumPackets);
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OstTraceFunctionExit1( CISOCHTRANSFER_CISOCHTRANSFER_EXIT, this );
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}
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CIsochTransfer::~CIsochTransfer()
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{
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OstTraceFunctionEntry1( CISOCHTRANSFER_CISOCHTRANSFER_ENTRY_DUP01, this );
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// Cancel the transfer
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Cancel();
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OstTraceFunctionExit1( CISOCHTRANSFER_CISOCHTRANSFER_EXIT_DUP01, this );
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}
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TBool CIsochTransfer::DataPolled(TUint aPacketsToBeRead, RBuf8& aDataPolled)
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{
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OstTraceFunctionEntryExt( CISOCHTRANSFER_DATAPOLLED_ENTRY, this );
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TInt numOfPacketsReturned = 0;
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TInt firstPacketIndex = 0;
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TInt totalPacketsRead = 0;
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TInt packetsToBeRead = aPacketsToBeRead;
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TUint dataPolledBufSize = iMaxPacketSize*aPacketsToBeRead;
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aDataPolled.CreateL(dataPolledBufSize);
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do {
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TPtrC8 ptrRet = iTransferDescriptor.Packets(firstPacketIndex, packetsToBeRead, numOfPacketsReturned);
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OstTrace1(TRACE_NORMAL, CISOCHTRANSFER_DATAPOLLED, "numOfPacketsReturned = %d", numOfPacketsReturned);
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OstTrace1(TRACE_NORMAL, CISOCHTRANSFER_DATAPOLLED_DUP01, "ptrRet.Length() = %d", ptrRet.Length());
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firstPacketIndex = numOfPacketsReturned;
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totalPacketsRead += numOfPacketsReturned;
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packetsToBeRead = packetsToBeRead - numOfPacketsReturned;
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OstTrace1(TRACE_NORMAL, CISOCHTRANSFER_DATAPOLLED_DUP02, "totalPacketsRead = %d", totalPacketsRead);
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OstTrace1(TRACE_NORMAL, CISOCHTRANSFER_DATAPOLLED_DUP03, "packetsToBeRead = %d", packetsToBeRead);
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aDataPolled.Append(ptrRet);
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} while(totalPacketsRead != aPacketsToBeRead);
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OstTraceFunctionExitExt( CISOCHTRANSFER_DATAPOLLED_EXIT, this, ETrue );
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return ETrue;
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}
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TInt CIsochTransfer::TransferInL(TInt aPacketsExpected)
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{
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OstTraceFunctionEntryExt( CISOCHTRANSFER_TRANSFERINL_ENTRY, this );
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// Activate the asynchronous transfer
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OstTrace0(TRACE_NORMAL, CISOCHTRANSFER_TRANSFERINL, "Activating isoch. in transfer");
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iTransferDescriptor.Reset();
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TPacketLengths fullLengths = iTransferDescriptor.Lengths();
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for(TInt packet = 0; packet < fullLengths.MaxNumPackets(); packet++)
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{
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fullLengths[packet] = iMaxPacketSize;
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}
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OstTrace1(TRACE_NORMAL, CISOCHTRANSFER_TRANSFERINL_DUP01, "fullLengths.MaxNumPackets() == %d",fullLengths.MaxNumPackets());
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iTransferDescriptor.ReceivePackets(aPacketsExpected);
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Pipe().Transfer(iTransferDescriptor,iStatus);
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SetActive();
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OstTraceFunctionExitExt( CISOCHTRANSFER_TRANSFERINL_EXIT, this, KErrNone );
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return KErrNone;
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}
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TInt CIsochTransfer::RegisterTransferDescriptor()
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{
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OstTraceFunctionEntry1( CISOCHTRANSFER_REGISTERTRANSFERDESCRIPTOR_ENTRY, this );
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// Register the transfer descriptor with the interface
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TInt err(Interface().RegisterTransferDescriptor(iTransferDescriptor));
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if(err != KErrNone)
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{
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OstTrace1(TRACE_NORMAL, CISOCHTRANSFER_REGISTERTRANSFERDESCRIPTOR, "<Error %d> Unable to register transfer descriptor",err);
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}
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OstTraceFunctionExitExt( CISOCHTRANSFER_REGISTERTRANSFERDESCRIPTOR_EXIT, this, err );
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return err;
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}
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TInt CIsochTransfer::PrepareTransfer(const TDesC8& aIsochData)
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{
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OstTraceFunctionEntryExt( CISOCHTRANSFER_PREPARETRANSFER_ENTRY, this );
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//
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iTransferDescriptor.Reset();
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TPacketLengths fullLengths = iTransferDescriptor.Lengths();
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OstTrace1(TRACE_NORMAL, CISOCHTRANSFER_PREPARETRANSFER, "fullLengths.MaxNumPackets() == %d",fullLengths.MaxNumPackets());
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//
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TInt bytesRemaining(aIsochData.Size());
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TInt maxAvailablePacketSlots;
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TInt startOffset(0);
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TInt startPacket(0);
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OstTrace1(TRACE_NORMAL, CISOCHTRANSFER_PREPARETRANSFER_DUP01, "Audio data is %d bytes",bytesRemaining);
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// Keep saving the isoch data to transfer in each packet buffer supplied
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// by the transfer descriptor
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while(bytesRemaining)
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{
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// Request a modifiable buffer to write the isoch data to
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TPtr8 packetBuffer = iTransferDescriptor.WritablePackets(bytesRemaining/iMaxPacketSize,maxAvailablePacketSlots);
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TInt dataToWrite = Min(bytesRemaining,packetBuffer.MaxSize());
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if(dataToWrite == 0)
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{
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OstTrace0(TRACE_NORMAL, CISOCHTRANSFER_PREPARETRANSFER_DUP02, "<Warning> dropping the rest of the isoch data");
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break;
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}
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// Validate entire buffer as it is going to be filled
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packetBuffer.SetMax();
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// Calculate the number of packets to write in this buffer
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TInt maxPacket = dataToWrite / iMaxPacketSize;
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for(TInt packet = 0; packet < maxPacket; packet++)
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{
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fullLengths[startPacket + packet] = iMaxPacketSize;
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}
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packetBuffer.Copy(aIsochData.Mid(startOffset, maxPacket * iMaxPacketSize));
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iTransferDescriptor.SaveMultiple(maxPacket);
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bytesRemaining -= maxPacket * iMaxPacketSize;
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startOffset += maxPacket * iMaxPacketSize;
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startPacket += maxPacket;
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}
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OstTraceFunctionExitExt( CISOCHTRANSFER_PREPARETRANSFER_EXIT, this, KErrNone );
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return KErrNone;
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}
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TInt CIsochTransfer::TransferOut()
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{
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OstTraceFunctionEntry1( CISOCHTRANSFER_TRANSFEROUT_ENTRY, this );
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// Transfer the iscohronous data
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OstTrace0(TRACE_NORMAL, CISOCHTRANSFER_TRANSFEROUT, "Activating isochronous out transfer");
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Pipe().Transfer(iTransferDescriptor,iStatus);
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SetActive();
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OstTraceFunctionExitExt( CISOCHTRANSFER_TRANSFEROUT_EXIT, this, KErrNone );
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return KErrNone;
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}
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}
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