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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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#ifndef __METADATAFILEWRITER_H
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#define __METADATAFILEWRITER_H
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// INCLUDES
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#include <e32base.h>
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#include <3gplibrary/mp4lib.h>
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#include "mp4atom.h"
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// FORWARD DECLARATIONS
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class RFile64;
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#define NUM_MDF 10 /* Number of temporary metadata files */
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// CLASS DECLARATION
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NONSHARABLE_CLASS(CMetaDataWriterBuffer) : public CBase
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{
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public: // Constructors and destructor
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inline CMetaDataWriterBuffer() : iData( NULL ), iOutputFileNum( -1 ) {}
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inline CMetaDataWriterBuffer( HBufC8& aBuffer,
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const TInt aOutputFileNum)
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: iData(&aBuffer), iOutputFileNum(aOutputFileNum) {}
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/**
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* Destructor.
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*/
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~CMetaDataWriterBuffer();
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public:
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HBufC8* iData;
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TInt iOutputFileNum;
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};
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/**
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* Async buffering file writer.
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*/
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NONSHARABLE_CLASS(CMetaDataFileWriter) : public CActive
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{
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public: // Constructors and destructor
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/**
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* Two-phased constructor.
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*/
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static CMetaDataFileWriter* NewL( );
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/**
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* Destructor.
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*/
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~CMetaDataFileWriter();
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public: // New functions
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/**
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* Writes incoming buffer data to internal buffers for writing to disk.
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* @since 2.6
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* @param aFileNumber Index of file the data is to be written
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* @param aBuf Data to be written
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* @return Error code, KErrNone if no errors, otherwise one of the system wide error codes.
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*/
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TInt Write( RFile64& aFile, const TInt aFileNumber, const TDesC8& aBuf );
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/**
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* Flush internal buffers to disk.
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* @since 2.6
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* @return Error code, KErrNone if no errors, otherwise one of the system wide error codes.
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*/
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TInt Flush();
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/**
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* Reads data from internal buffers that have not yet been written to disk.
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* @since 5.0
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* @param aFileNumber Index of file
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* @param aBuf Data to be written
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* @param bytestoread Number of bytes to readData
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* @return number of bytes read
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*/
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TInt ReadBuffer( const TInt aFileNumber, TDes8& aBuf, TInt bytestoread );
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protected: // Functions from base classes
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/**
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* From CActive Cancels async request.
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*/
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void DoCancel();
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/**
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* From CActive Called when async request completes.
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*/
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void RunL();
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/**
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* Called when errors in RunL force Leave.
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*/
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TInt RunError(TInt aError);
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private:
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/**
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* C++ default constructor.
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*/
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CMetaDataFileWriter();
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/**
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* By default Symbian 2nd phase constructor is private.
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*/
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void ConstructL( );
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/**
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* Writes incoming data to internal buffers and buffer queues..
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* @since 2.6
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* @param aFileNumber Index of file the data is to be written
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* @param aBuf Data to be added to buffers..
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* @return Error code, KErrNone if no errors, otherwise one of the system wide error codes.
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*/
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TInt AddDataToBuffer(const TInt aFileNumber, const TDesC8& aBuf );
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private:
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// Write error code.
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TInt iError;
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// Whether we are flushing after async write.
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TBool iFlush;
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// Whether the flushing is done.
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TBool iFlushDone;
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// Array to keep file status information
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TBool iAsyncWritingOngoing;
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// Outputfiles
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RPointerArray<RFile64> iOutputFile;
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// Array of output buffers.
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RPointerArray<CMetaDataWriterBuffer> iOutputBufferQueue;
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// Array of input buffers.
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RPointerArray<CMetaDataWriterBuffer> iInputBufferArray;
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// Queue of empty write buffers.
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RPointerArray<CMetaDataWriterBuffer> iEmptyBufferQueue;
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// Array to count delivered bytes from iInputBufferArray
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TInt iInputBufferArrayDelivered[NUM_MDF];
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};
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#endif //__METADATAFILEWRITER_H
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// End of File
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