author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Tue, 31 Aug 2010 15:24:25 +0300 | |
branch | RCL_3 |
changeset 62 | 924385140d98 |
permissions | -rw-r--r-- |
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// ssyreferencechanneldataprovider.h |
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/* |
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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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/** |
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@file |
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@internalComponent |
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*/ |
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#ifndef SSYREFERENCECHANNELDATAPROVIDER_H |
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#define SSYREFERENCECHANNELDATAPROVIDER_H |
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#include <sensors/spi/ssychanneldataprovider.h> |
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class CSsyReferenceChannel; |
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class TSsyReferenceMsg; |
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/** |
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* Channel data provider implementation. |
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*/ |
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class CSsyReferenceChannelDataProvider : public CBase, public MSsyChannelDataProvider |
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{ |
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public: |
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/** |
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* Two-phase constructor |
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* |
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* @param[in] aChannel Reference to channel this provider belongs to |
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* @return Pointer to created CSsyReferenceControl object |
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*/ |
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static CSsyReferenceChannelDataProvider* NewL( CSsyReferenceChannel& aChannel ); |
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/** |
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* Virtual destructor |
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*/ |
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virtual ~CSsyReferenceChannelDataProvider(); |
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// from base class MSsyChannelDataProvider |
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/** |
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* From MSsyChannelDataProvider |
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* Starts asynchronous data listening. Multiple OpenChannel()-requests |
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* can be active for different channels at the same time. |
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* |
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* @param[in] aBuffer Pointer to a data buffer |
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* @param[in] aCount Indicates data buffer size as a count of the data objects. |
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*/ |
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void StartChannelDataL( const TSensrvChannelId aChannelId, TUint8* aBuffer, TInt aCount ); |
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/** |
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* From MSsyChannelDataProvider |
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* Stops asynchronous data listening. The data buffer is not valid after call of |
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* this function. |
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*/ |
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void StopChannelDataL( const TSensrvChannelId aChannelId ); |
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/** |
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* From MSsyChannelDataProvider |
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* Forces SSY to call BufferFilled() regardless of how many data items have been |
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* written to buffer. Even if no data items have yet been written, BufferFilled() |
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* must be called. |
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*/ |
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void ForceBufferFilledL( const TSensrvChannelId aChannelId ); |
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/** |
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* Returns a pointer to a specified interface - to allow future extension |
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* of this class without breaking binary compatibility |
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* |
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* @param aInterfaceUid Identifier of the interface to be retrieved |
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* @param aInterface A reference to a pointer that retrieves the specified interface. |
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*/ |
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void GetChannelDataProviderInterfaceL( TUid aInterfaceUid, TAny*& aInterface ); |
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/** |
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* Channel data item received |
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* |
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* @param[in] aMessage Contains channel item |
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*/ |
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void ChannelDataReceivedL( TSsyReferenceMsg* aMessage ); |
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private: |
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/** |
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* C++ constructor. |
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* @param[in] aChannel Reference to channel this provider belongs to |
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*/ |
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CSsyReferenceChannelDataProvider( CSsyReferenceChannel& aChannel ); |
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/** |
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* Symbian 2nd phase constructor. |
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*/ |
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void ConstructL(); |
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/** |
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* Adds data into buffer. |
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* |
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*@param[in] aData Data to add to buffer |
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*@param[in] aSize Size of data |
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*/ |
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void AddDataToBuffer( TUint8* aData, const TInt aSize ); |
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/** |
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* Sends BufferFilled notification to MSsyCallback |
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*/ |
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void SendBufferFilled(); |
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private: // data |
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/** |
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* Reference to channel for which this provider belongs to |
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*/ |
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CSsyReferenceChannel& iChannel; |
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/** |
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* Pointer to data buffer in Sensor Server side |
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*/ |
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TUint8* iDataBuffer; |
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/** |
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* Maximum requested data items |
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*/ |
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TInt iMaxCount; |
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/** |
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* Number of items in buffer |
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*/ |
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TInt iDataCount; |
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}; |
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#endif // SSYREFERENCECHANNELDATAPROVIDER_H |