author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Thu, 27 May 2010 12:53:14 +0300 | |
changeset 24 | 7d93ee07fb27 |
parent 15 | cf5481c2bc0b |
child 50 | 21fe8338c6bf |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 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: videodatacontainer class definition* |
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*/ |
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#ifndef __VIDEODATACONTAINER_H__ |
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#define __VIDEODATACONTAINER_H__ |
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// INCLUDES |
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#include <qhash.h> |
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#include <qlist.h> |
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#include <qpair.h> |
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#include <mpxitemid.h> |
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// FORWARD DECLARATIONS |
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class CMPXMedia; |
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class VideoDataContainer |
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{ |
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public: |
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/** |
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* contructor |
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*/ |
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VideoDataContainer(); |
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/** |
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* destructor |
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*/ |
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virtual ~VideoDataContainer(); |
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public: // from QHash |
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/** |
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* Deallocates all CMPXMedia objects and clear containers |
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*/ |
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void clear(); |
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/** |
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* Deallocates and removes item of provided id. |
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* |
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* @param id media item id |
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*/ |
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void remove(const TMPXItemId &id); |
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/** |
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* Appends provided media object to container. |
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* If item with same id exists allready, old item is being |
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* removed and replaced by the new item |
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* |
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* @param media - media object to append |
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*/ |
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void append(CMPXMedia *media); |
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/** |
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* Returns a media object from provided index |
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* |
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* @param index position of wanted object |
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* |
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* @return CMPXMedia pointer to media object or null if |
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* object is not found from wanted index |
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* |
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*/ |
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CMPXMedia* fromIndex(int index) const; |
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/** |
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* Returns an index of id. |
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* |
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* @param id item id |
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* |
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* @return int index of item or -1 if item with provided id is not found |
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*/ |
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int indexOfId(const TMPXItemId &id) const; |
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/** |
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* Returns id of item from provided index |
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* |
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* @param index potisiotn where to look for item |
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* |
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* @return id of item or invalid TMPXItemId if item is not found from provided index |
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*/ |
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TMPXItemId idFromIndex(int index) const; |
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/** |
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* returns count of items |
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* |
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* @return int |
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*/ |
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int count() const; |
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/** |
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* Method removes item from data container at provided index and |
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* appends it into removed buffer. |
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* |
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* Note that calling this method decreases item count and causes |
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* indexes after provided index to be resynch. This causes callers |
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* index list to be out of sync if not called starting from the |
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* biggest index |
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* |
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* @param inteIndex index of item |
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* @return TMPXItemId id of the item marked as removed |
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*/ |
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TMPXItemId markItemRemoved(const int &itemIndex); |
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/** |
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* Method removes provided items from mRemovedMedia |
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* |
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* @param itemIds ids of items to be removed. If null, removes all |
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* @return int count of items actually removed |
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*/ |
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int clearRemoved(QList<TMPXItemId> *itemIds = 0); |
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/** |
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* Method removed provided items from mRemovedMedia and returns them |
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* int actual container |
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* |
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* @param itemIds ids of items to be restored. If null, restores all |
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* |
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* @return int count of items actually restored |
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*/ |
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int restoreRemovedItems(QList<TMPXItemId> *itemIds = 0); |
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|
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/** |
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* Returns item from removed buffer |
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* |
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* @param itemId id of item to be returned |
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*/ |
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CMPXMedia* getRemovedMedia(TMPXItemId itemId); |
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private: |
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/** |
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* Decrements indexes of items in mMediaData by one after |
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* provided items. |
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* Item iterator is first found based on item id gotten from id list |
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* and items' indexes after that are to be decreased. |
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* |
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* @param fromindex - index from where to start decreasing |
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*/ |
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void decIndexesAfter(int fromIndex); |
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private: // data |
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/** |
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* list of media ids used to fetch item thought index. |
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*/ |
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QList<TMPXItemId> mMediaIds; |
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|
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/** |
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* lookup hash for fetching correct item based on id |
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* Key: item id |
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* value: pair, where first is item index and second is item data |
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*/ |
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QHash<TMPXItemId, QPair<int, CMPXMedia*> > mMediaData; |
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/** |
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* lookup hash for media items that are deleted, but not yet completely |
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* removed from the filesystem. |
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*/ |
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QHash<TMPXItemId, CMPXMedia*> mRemovedMedia; |
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}; |
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#endif // __VIDEODATACONTAINER_H__ |
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