author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Fri, 19 Mar 2010 09:28:59 +0200 | |
changeset 23 | 74c9f037fd5d |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2008-2009 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: Thumbnail save task implementation |
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* |
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*/ |
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/** |
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* @internal reviewed 30/07/2007 by Simon Brooks |
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*/ |
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#ifndef GLXTNSAVETHUMBNAILTASK_H |
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#define GLXTNSAVETHUMBNAILTASK_H |
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// INCLUDES |
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#include "glxtntask.h" |
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// CONSTANTS |
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// MACROS |
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// DATA TYPES |
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// FUNCTION PROTOTYPES |
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// FORWARD DECLARATIONS |
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class CFbsBitmap; |
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class CImageEncoder; |
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class CGlxtnFileInfo; |
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// CLASS DECLARATION |
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/** |
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* Task to save a generated thumbnail in persistent storage. |
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* |
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* @author Dan Rhodes |
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* @ingroup glx_thumbnail_creator |
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*/ |
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NONSHARABLE_CLASS(CGlxtnSaveThumbnailTask) : public CGlxtnTask |
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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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* @param iItemId Media ID of item whose thumbnail is to be saved. |
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* @param aFileInfo Information about the media file. |
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* @param aSize Requested thumbnail size. |
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* @param aThumbnail Thumbnail bitmap to save. |
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* @param aStorage Client's storage interface. |
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*/ |
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static CGlxtnSaveThumbnailTask* NewL( |
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const TGlxMediaId& aItemId, |
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CGlxtnFileInfo* aFileInfo, const TSize& aSize, |
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CFbsBitmap* aThumbnail, MGlxtnThumbnailStorage* aStorage); |
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/** |
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* Destructor. |
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*/ |
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virtual ~CGlxtnSaveThumbnailTask(); |
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protected: // From CGlxtnTask |
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TBool DoStartL(TRequestStatus& aStatus); |
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void DoCancel(); |
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TBool DoRunL(TRequestStatus& aStatus); |
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TBool DoRunError(TInt aError); |
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protected: |
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/** |
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* Constructor for derived classes. |
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* @param aId Task type ID. |
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* @param iItemId Media ID of item whose thumbnail is to be saved. |
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* @param aStorage Client's storage interface. |
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*/ |
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CGlxtnSaveThumbnailTask(const TGlxtnTaskId& aId, |
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const TGlxMediaId& aItemId, MGlxtnThumbnailStorage* aStorage); |
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/** |
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* Encode the bitmap to a data buffer. |
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* @param aStatus Request status for the asynchronous operation. |
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*/ |
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void EncodeThumbnailL(TRequestStatus& aStatus); |
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/** |
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* Save buffer to storage. |
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* @param aStatus Request status for the asynchronous operation. |
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*/ |
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void SaveThumbnailL(TRequestStatus& aStatus); |
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private: |
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/** |
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* Constructor. |
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* @param iItemId Media ID of item whose thumbnail is to be saved. |
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* @param aSize Requested thumbnail size. |
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* @param aStorage Client's storage interface. |
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*/ |
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CGlxtnSaveThumbnailTask(const TGlxMediaId& aItemId, const TSize& aSize, |
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MGlxtnThumbnailStorage* aStorage); |
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111 |
|
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/** |
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* By default Symbian 2nd phase constructor is private. |
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* @param aFileInfo Information about the media file. |
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* @param aThumbnail Thumbnail bitmap to save. |
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*/ |
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void ConstructL(CGlxtnFileInfo* aFileInfo, CFbsBitmap* aThumbnail); |
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118 |
|
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protected: // Data |
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/** |
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* States for the task's state machine. |
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*/ |
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enum TSaveState |
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{ |
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EStateEncoding, EStateSaving, EStateFetchingUri, |
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EStateDecoding, EStateChecking, EStateScaling, EStateFiltering |
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}; |
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128 |
|
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/** Requested thumbnail size */ |
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TSize iSize; |
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/** Information about the item's media file */ |
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CGlxtnFileInfo* iFileInfo; |
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/** Thumbnail bitmap to save (owned) */ |
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CFbsBitmap* iThumbnail; |
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/** Current task state */ |
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TSaveState iState; |
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137 |
|
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private: // Data |
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/** Format in which the bitmap was encoded */ |
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TGlxImageDataFormat iFormat; |
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/** Encoder for the bitmap (owned) */ |
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CImageEncoder* iEncoder; |
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/** Buffer for encoded data (owned) */ |
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HBufC8* iData; |
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}; |
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|
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#endif // GLXTNSAVETHUMBNAILTASK_H |
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|
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// End of File |