/*

* Copyright (c) 2006-2007 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:      Base DLNA profile resolver class for audio files.

*

*/

#ifndef C_UPNPAUDIOSOLVERBASE_H

#define C_UPNPAUDIOSOLVERBASE_H

// system includes

#include <mda/client/utility.h> // MMdaObjectStateChangeObserver

#include <mda/common/audio.h> // TMdaFileClipLocation

#include <mmf/common/mmfutilities.h> // TFourCC

// user includes

#include "upnpprofiler.h"

// forward declarations

class CMdaAudioConvertUtility;

class TMdaFileClipLocation;

// constants

// NONE

/**

 *  Audio file DLNA profile base resolver class.

 *

 *  This class is the base class for resolving DLNA profile of audio files.

 *  It contains methods for querying the profiles supported by this solver 

 *  and for resolving a DLNA profile of a given audio file.

 *

 *

 *  @lib dlnaprofiler.lib

 *  @since S60 v3.1

 */

NONSHARABLE_CLASS( CUpnpAudioSolverBase ) : 

                                        public CBase,

                                        public MUpnpProfiler, 

                                        public MMdaObjectStateChangeObserver

    {

public:

    static CUpnpAudioSolverBase* NewL();

    static CUpnpAudioSolverBase* NewLC();

    virtual ~CUpnpAudioSolverBase();

// from base class MUpnpProfiler

    /**

     * From MUpnpProfiler.

     * SupportedProfilesL returns DLNA profiles that are currently supported.

     *

     * @since S60 v3.1

     * @param aProfiles Descriptor array where supported DLNA profiles are 

     *                  added.

     * @return TInt Error code, KErrNone if successfull.

     */

    TInt SupportedProfilesL( CDesC16ArrayFlat* aProfiles ) const;

    /**

     * From MUpnpProfiler.

     * ProfileForFileL is for resolving a DLNA profile of a given file.

     * Besides of file name, also mime type of the file is passed as a 

     * parameter in order to avoid re-opening of the file.

     *

     * @since S60 v3.1

     * @param aFileName Filename of the file which is to be resolved.

     * @param aMimeType Mime type of the file which is to be resolved.

     * @param aFile Handle to opened file specified by aFilename.

     * @return DLNA profile of the file as a HBufC*, 

     *         NULL if could not be resolved

     */

    HBufC* ProfileForFileL( const TDesC& aFilename, 

                            const TDesC8& aMimetype, 

                            RFile& aFile );

private:

    CUpnpAudioSolverBase();

    void ConstructL();

    /**

     * GetAudioFileInformationL

     *

     * @since S60 v3.1

     * @param aFileName Filename of the file which is to be resolved.

     * @return Error code. KErrNone if successfull.

     */

    TInt GetAudioFileInformationL( const TDesC& aFilename );

// from base class MMdaObjectStateChangeObserver

    /**

     * From MMdaObjectStateChangeObserver.

     * MoscoStateChangeEvent 

     *

     * @since S60 v3.1

     * @param aObject

     * @param aPreviousState

     * @param aCurrentState

     * @param aErrorCode

     */

    void MoscoStateChangeEvent( CBase *aObject, TInt aPreviousState, 

                                TInt aCurrentState, TInt aErrorCode );

    /**

     * Determine3GppProfileL chooses the correct profile among supported 3gpp 

     * profiles. The decision is made based on audio file attributes that 

     * are stored in member variables of this class. 

     *

     * @since S60 v3.1

     * @return HBufC*. Pointer to string descriptor containing the profile.

     */

    HBufC* Determine3GppProfileL() const;

    /**

     * DetermineWmaProfileL chooses the correct profile among supported wma 

     * profiles. The decision is made based on audio file attributes that 

     * are stored in member variables of this class. 

     *

     * @since S60 v3.1

     * @return HBufC*. Ponter to string descriptor containing the profile.

     */

    HBufC* DetermineWmaProfileL() const;

    /**

     * DetermineMp4ProfileL chooses the correct profile among supported mp4 

     * profiles. The decision is made based on audio file attributes that 

     * are stored in member variables of this class. 

     *

     * @since S60 v3.1

     * @return HBufC*. Pointer to string descriptor containing the profile.

     */

    HBufC* DetermineMp4ProfileL() const;

private: // data

    CMdaAudioConvertUtility*    iAudioconverter; // owned

    CActiveSchedulerWait*       iWait; // owned

    // attributes related to audio file attributes. 

    TUint iChannelCount;

    TUint iSampleRate;

    TUint iBitrate;

    };

#endif // C_UPNPAUDIOSOLVERBASE_H