author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Tue, 02 Feb 2010 01:11:40 +0200 | |
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child 6 | f8e15b44d440 |
permissions | -rw-r--r-- |
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// Copyright (c) 2006-2009 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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@publishedPartner |
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@released |
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*/ |
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#ifndef CMTPTYPEFILE_H |
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#define CMTPTYPEFILE_H |
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#include <e32base.h> |
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#include <f32file.h> |
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#include <mtp/mmtptype.h> |
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/** |
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Defines the MTP file object data type. |
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@publishedPartner |
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@released |
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*/ |
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class CMTPTypeFile : public CActive, public MMTPType |
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{ |
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public: |
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IMPORT_C static CMTPTypeFile* NewL(RFs& aFs, const TDesC& aFileName, TFileMode aFileMode); |
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IMPORT_C static CMTPTypeFile* NewLC(RFs& aFs, const TDesC& aFileName, TFileMode aFileMode); |
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IMPORT_C static CMTPTypeFile* NewL(RFs& aFs, const TDesC& aFileName, TFileMode aFileMode, TInt64 aRequiredSize, TInt64 aOffSet = 0); |
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IMPORT_C static CMTPTypeFile* NewLC(RFs& aFs, const TDesC& aFileName, TFileMode aFileMode, TInt64 aRequiredSize, TInt64 aOffSet = 0); |
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IMPORT_C ~CMTPTypeFile(); |
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IMPORT_C void SetSizeL(TUint64 aSize); |
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#ifdef SYMBIAN_ENABLE_64_BIT_FILE_SERVER_API |
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IMPORT_C RFile64& File(); |
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#else |
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IMPORT_C RFile& File(); |
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#endif |
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public: // From MMTPType |
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IMPORT_C TInt FirstReadChunk(TPtrC8& aChunk) const; |
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IMPORT_C TInt NextReadChunk(TPtrC8& aChunk) const; |
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IMPORT_C TInt FirstWriteChunk(TPtr8& aChunk); |
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IMPORT_C TInt NextWriteChunk(TPtr8& aChunk); |
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IMPORT_C TUint64 Size() const; |
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IMPORT_C TUint Type() const; |
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IMPORT_C TBool CommitRequired() const; |
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IMPORT_C MMTPType* CommitChunkL(TPtr8& aChunk); |
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IMPORT_C TInt64 GetByteSent(); |
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private: |
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CMTPTypeFile(); |
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void ConstructL(RFs& aFs, const TDesC& aName, TFileMode aMode); |
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void ConstructL(RFs& aFs, const TDesC& aName, TFileMode aMode, TInt64 aRequiredSize, TInt64 aOffSet); |
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void ToggleRdWrBuffer(); |
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protected: // From CActive |
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void DoCancel(); |
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private: // From CActive |
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TInt RunError(TInt aError); |
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void RunL(); |
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private: |
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/** |
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The read and write data stream states. |
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*/ |
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enum TReadWriteSequenceState |
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{ |
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/** |
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Data stream is inactive. |
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*/ |
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EIdle, |
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/** |
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Data stream is in progress. |
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*/ |
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EInProgress |
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}; |
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/** |
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The intermediate data buffer. Note that this is declared mutable to allow |
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state updates while processing a read data stream. |
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*/ |
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mutable RBuf8 iBuffer1; |
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/** |
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The intermediate data buffer. Note that this is declared mutable to allow |
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state updates while processing a read data stream. |
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Used for double-buffering, the 2 buffers(buffer1 and buffer2) will be switched between reading data |
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from USB to buffer and writting data from Buffer into File System. |
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*/ |
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mutable RBuf8 iBuffer2; |
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/** |
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The flag indicate if this buffer is avaiable for writting data into, if true, it is ready for |
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USB-SIC to write file data into it, if false, it already contains file data, and is waiting |
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for writting the file data into file system. |
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The two buffer must be used in strict sequence, if both buffer is available, the buffer1 must |
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be firstly used by USB driver. |
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*/ |
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mutable TBool iBuffer1AvailForWrite; |
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115 |
|
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//If there occurs error during writting/reading data into/from this file, mark this flag as true, this will abort |
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//all further writting/reading and set the file size to 0 if needed. |
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mutable TBool iFileRdWrError; |
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119 |
|
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//This point to the current chunk which is waiting for being commit into File system. it might point to |
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//either of the 2 buffers. |
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mutable TPtr8 iCurrentCommitChunk; |
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123 |
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//true if the file is opened for reading; false if it is opened for Writting. |
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TBool iFileOpenForRead; |
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126 |
|
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//For file reading, used to indicate how much bytes are waiting to be read, for file writting, indicate how much |
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//byte are wating to be received by USB and writting to file. |
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mutable TInt64 iRemainingDataSize; |
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|
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//The RFile::SetSize() method may take over 40 seconds if we create a file and set its size |
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//to a very large value, and this will cause timeout in MTP protocol layer. To avoid this |
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//timeout, when creating a large file(over 512MB), instead of setting its size directly to |
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//the target size by one singile RFile::SetSize() call, we'll call RFile::SetSize() multiple |
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//times and set the file size step by step acumulately. For example, for a 2GB file, its |
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//size will be set to 0.5G first, and then 1G, 1.5G and at last 2G. |
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|
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//For file reading, used to indicate the target size to be transfered to initiator, for file writting, used to |
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//incicate the target size for a file that being transfering to device. |
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TInt64 iTargetFileSize; |
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//This is the acumulated received size for the file represented by this object. |
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TInt64 iTotalReceivedSize; |
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//This represent the current size we call SetSize() to the file. |
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TInt64 iCurrentFileSetSize; |
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/** |
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The data file. Note that this is declared mutable to allow state updates |
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while processing a read data stream. |
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*/ |
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#ifdef SYMBIAN_ENABLE_64_BIT_FILE_SERVER_API |
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mutable RFile64 iFile; |
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#else |
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mutable RFile iFile; |
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#endif |
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/** |
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The read data stream state variable. Note that this is declared mutable |
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to allow state updates while processing a read data stream. |
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*/ |
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mutable TUint iReadSequenceState; |
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|
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/** |
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The write data stream state variable. |
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*/ |
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TUint iWriteSequenceState; |
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TInt64 iOffSet; |
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mutable TInt64 iByteSent; |
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}; |
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#endif // CMTPTYPEFILE_H |
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174 |