/*

* Copyright (c) 2009 Aricent and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of the License "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:

* Aricent - initial contribution.

*

* Contributors:

*

* Description: 

* Export header file for Wrapper APIs.Interface class for 

* Mp3 Decoder Wrapper.The member functions are pure virtual functions which     

* are to be implemented by the derived class.

*

*/

#ifndef ARIMP3DECWRAPPER_H	

#define ARIMP3DECWRAPPER_H

// System includes

#include <E32Base.h>

// Class declaration

class TMp3FrameInfo

    {

public:  

    TInt iSamplingFrequency;

	TInt iNumberOfChannels;

	TInt iBufferSize;

	TInt iBitRate;

    };

// Class declaration

class CAriMp3DecWrapper : public CBase

    {

public:

    /**

     * Two-phased constructor.

     * @return pointer to an instance of CAriMp3DecWrapper

     */

	IMPORT_C static CAriMp3DecWrapper* NewL();

	/**> Destructor */

	virtual ~CAriMp3DecWrapper();

	/**

	 * The function resets the decoder.

	 * @param   

	 * @return return status         

	 */

    virtual TInt Reset() = 0 ;

    /**

	 * The function Gets frame information for the given source.

	 * @param aBuf

	 *    	Pointer to buffer containing the header of input stream data

	 * @param aBufLen

	 * 		Size of Buffer in bytes

	 * @param aFrameLen 

	 * 		Length of the frame

	 * @param aInfo

	 * 		Reference to the structure TMp3FrameInfo 

	 * @return return status         

	 */  

    virtual TInt GetFrameInfo( const TUint8* aBuf, TInt aBufLen,

								TInt &aFrameLen, TMp3FrameInfo& aInfo ) = 0 ;

    /**

	 * The function Gets maximum out put frame length with the information 

	 * @param aFrameLen 

	 * 		Length of the maximum out put frame

	 * @param aInfo

	 * 		Reference to the structure TMp3FrameInfo 

	 * @return return status         

	 */ 

    virtual TInt GetMaxFrameInfo( TInt &aFrameLen, 

									TMp3FrameInfo& aInfo ) = 0 ;

    /**

	 * The function gives the offset value of the buffer from where frame 

	 * starts. 

	 * @param aBuf 

	 * 		Pointer to the input buffer 

	 * @param aBufLen

	 * 		Length of the input buffer

	 * @param aSyncPos

	 * 		Offset value of the buffer from where frame starts	

	 * @return return status         

	 */ 

    virtual TInt SeekSync( const TUint8* aBuf, TInt aBufLen, 

														TInt &aSyncPos ) = 0 ;

    /**

	 * The function decodes the aSrc buffer. 

	 * @param aSrc 

	 * 		Pointer to the source buffer 

	 * @param aSrcUsed

	 * 		Size of the source buffer

	 * @param aDst

	 * 		Pointer to the destination buffer

	 * @param aDstLen

	 * 		Size of the destination buffer	

	 * @return return status         

	 */ 

    virtual TInt Decode( TUint8* aSrc, TInt& aSrcUsed, TUint8* aDst, 

														TInt& aDstLen ) = 0 ;    

    };

#endif //ARIMP3DECWRAPPER_H

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