author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Fri, 14 May 2010 15:49:53 +0300 | |
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parent 19 | 4e84c994a771 |
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/* |
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* Copyright (c) 2006 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: Exports a m3u playlist file |
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* |
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*/ |
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#ifndef MPXM3UPLAYLISTEXPORTER_H |
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#define MPXM3UPLAYLISTEXPORTER_H |
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#include <f32file.h> |
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#include <mpxplaylistpluginobserver.h> |
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/** |
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* CMPXM3uPlaylistExporter exports a m3u playlist file. Each instance can |
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* only handle the export of one m3u file and the processing starts as |
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* soon as the object is instantiated. |
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* |
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* When processing is complete, CMPXM3uPlaylistExporter will invoke |
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* callback through MMPXPlaylistPluginObserver interface. Once completed, |
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* the exporting service cannot be restarted. A new instance is required |
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* if the client wishes to export another m3u playlist file. |
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*/ |
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class CMPXM3uPlaylistExporter : 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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* @param aFs a file session handle |
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* @param aObserver reference to the playlist plugin observer |
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* @param aPlaylist playlist to be externalized |
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* @param aFilePath File path for where the playlist should be placed |
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* @param aStatus caller's request status |
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* @return object of constructed |
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*/ |
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IMPORT_C static CMPXM3uPlaylistExporter* NewL( |
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RFs* aFs, |
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MMPXPlaylistPluginObserver* aObserver, |
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const CMPXMedia& aPlaylist, |
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const TDesC& aFilePath, |
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TRequestStatus& aStatus ); |
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/** |
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* Destructor |
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*/ |
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IMPORT_C virtual ~CMPXM3uPlaylistExporter(); |
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protected: |
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/** |
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* Constructor |
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* |
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* @param aFs a file session handle |
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* @param aObserver reference to the playlist plugin observer |
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* @param aPlaylist playlist to be externalized |
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* @param aStatus caller's request status |
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* @return object of constructed |
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*/ |
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IMPORT_C CMPXM3uPlaylistExporter( |
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RFs* aFs, |
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MMPXPlaylistPluginObserver* aObserver, |
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const CMPXMedia& aPlaylist, |
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TRequestStatus& aStatus ); |
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/** |
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* 2nd phase constructor |
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* |
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* @param aFilePath File path for where the playlist should be placed |
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*/ |
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IMPORT_C virtual void ConstructL( |
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const TDesC& aFilePath); |
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/** |
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* From CActive |
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* Handles an active object's request completion event |
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*/ |
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IMPORT_C virtual void RunL(); |
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/** |
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* From CActive |
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* Implements cancellation of an outstanding request. |
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*/ |
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IMPORT_C virtual void DoCancel(); |
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/** |
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* Does a step of the task |
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*/ |
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IMPORT_C virtual void DoTaskStep(); |
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private: |
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/** |
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* externalize a set number of the medias. This will be called until all |
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* the given medias have been processed |
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*/ |
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void ExternalizeL(); |
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/** |
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* Populates iLines with HBufC8's each representing one line of playlist |
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* file. |
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*/ |
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void PopulateLineArrayL(); |
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/** |
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* Converts iLine to 8-bit ASCII and places it to iLines array. |
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*/ |
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void AddLineToArrayL(); |
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/** |
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* Creates a header string, which tells that the playlist is in the |
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* extented m3u format, and stores it to iLine. |
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*/ |
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void CreateHeaderLineL(); |
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/** |
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* If media has title defined, creates extented info tag containing |
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* audio clip length and title. Info tag is stored to iLine. |
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*/ |
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void CreateExtentedInfoLineL( |
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const CMPXMedia& aMedia); |
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/** |
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* Creates a string containing iItem's relative or absolute path (path |
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* is relative if the audio clip is stored to the same directory, or |
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* it's sub-directories, as the playlist file). The stirng is stored to |
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* iLine. |
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*/ |
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void CreatePathLineL( |
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const CMPXMedia& aMedia, |
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const TDesC& aCurrentFolder, |
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TBool aAddNewLine); |
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/** |
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* Caluculates the length of the final playlist file, creates new buffer |
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* with that length, and appends all lines from iLines to it and frees |
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* iLines |
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*/ |
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void FlushLineArrayToBufferL(); |
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/** |
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* Writes playlist data from buffer to a file. |
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*/ |
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void WritePlaylistToFileL(); |
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/** |
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* Reset data members after processing the current request. |
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*/ |
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void Cleanup(); |
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/** |
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* Notify client of the specified error through MMPXPlaylistPluginObserver |
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* interface |
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*/ |
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void NotifyClient(TInt aError); |
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protected: // Data |
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const CMPXMedia& iPlaylist; |
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CMPXMediaArray* iMedias; |
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HBufC* iPlaylistFilePath; |
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TInt iDriveNumber; |
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TBool iPlaylistFileCreated; |
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HBufC8* iPlaylistBuf; |
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RPointerArray<HBufC8> iLines; |
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HBufC* iLine; |
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RFs* iFs; // not owned |
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MMPXPlaylistPluginObserver* iObserver; // not owned |
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TInt iCurrentMedia; |
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TBool iMoreToDo; |
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TRequestStatus* iCallerStatus; |
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}; |
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#endif // MPXM3UPLAYLISTIMPORTER_H |
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