/*

* Copyright (c) 2005 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:    

*

*/

#ifndef MCECNCODEC_H

#define MCECNCODEC_H

// INCLUDES

#include <mceaudiocodec.h>

#include <mcedefs.h>

// CONSTANTS

// CN Default Payload Types

const TUint8 KMceDefaultCnPayloadType = 13; 

const TUint8 KMceDefaultCnPayloadType2 = 19; 

// Default Sampling Rate   

const TUint KMceCnSamplingFreq = 8000;

// PTime and MaxPTime

const TUint KMceCnDefaultPtime =  20; 

const TUint KMceCnDefaultMaxPtime = 200;

// CLASS DECLARATION

/**

* Class for the Comfort Noise codec information.

*

* It checks the validity of inserted values for CN.

* 

*  @l

 mceclient.lib

*/

class CMceCnCodec : public CMceAudioCodec

    {

	public:  // Constructors and destructor

	    /**

	    * Destructor.

	    */

	    IMPORT_C ~CMceCnCodec();

	public: // From base class

	    /**

	    * Enable / Disable Voice Activity Detection.

	    * @param aEnableVAD, Boolean indicating whether to enable Voice Activity Detection

	    * @return KErrNotSupported if codec doesn't support VAD; otherwise KErrNone.

	    */

	    IMPORT_C TInt EnableVAD(TBool aEnableVAD);

        /**

	    * Sets bitrate used with codec for encoding.

	    * @param aBitrate, bitrate value for encoding

	    * @return KErrNotSupported if codec doesn't support bitrate value issued; otherwise KErrNone.

	    */

	    IMPORT_C TInt SetBitrate(TUint aBitrate);

	    /**

	    * Sets bitrates allowed with codec.

	    * @param aBitrates, allowed bitrate values 

	    * @return KErrNotSupported if codec doesn't support bitrate value issued; otherwise KErrNone.

	    */

	    IMPORT_C TInt SetAllowedBitrates(TUint aBitrates);

	    /**

	    * Sets the sampling frequency.

	    * @param aSamplingFreq, Sampling frequency to be used

	    * @return KErrNotSupported if codec doesn't support sampling frequency issued; otherwise KErrNone.

	    */

	    IMPORT_C TInt SetSamplingFreq(TUint aSamplingFreq);

	    /**

	    * Sets the packetization rate. 

	    * @param aPTime, Packetization rate, must be multiple of audio frame size.

	    * @return KErrNotSupported if codec doesn't support packetrate value issued; otherwise KErrNone.

	    */

	    IMPORT_C TInt SetPTime(TUint aPTime);

	    /**

	    * Sets the maximum packetization rate.

	    * @param aMaxPTime, maximum allowed packetization rate, must be multiple of audio frame size.

	    * @return KErrNotSupported if codec doesn't support packetrate value issued; otherwise KErrNone.

	    */

	    IMPORT_C TInt SetMaxPTime(TUint aMaxPTime);

	    /**

	    * Sets the payload type identifier.

	    * @param aPayloadType payload type identifier.

	    * @return One of the standard system-wide error codes.

	    */

	    IMPORT_C TInt SetPayloadType(TUint8 aPayloadType);

	    /**

	    * Sets the codec mode.

	    * @param aCodecMode	Codec mode

	    * @return KErrNotSupported if codec doesnt' support codec mode value issued; otherwise KErrNone.

	    */

	    IMPORT_C TInt SetCodecMode(TUint aCodecMode);

	    /**

	    * Clones codec, ownership is transferred.

	    * @return cloned codec

	    */

	    IMPORT_C CMceAudioCodec* CloneL() const;

	public: 

	    /**

	    * Two-phased constructor.

	    * @param aSdpName sdp name

	    */

	    static CMceCnCodec* NewL( TBuf8<KMceMaxSdpNameLength> aSdpName);

	    /**

	    * Two-phased constructor.

	    * @param aSdpName sdp name

	    */

	    static CMceCnCodec* NewLC(TBuf8<KMceMaxSdpNameLength> aSdpName);

	private:

	    /**

	    * C++ default constructor.

	    */

	    CMceCnCodec();

	    /**

	    * By default Symbian 2nd phase constructor is private.

	    */

	    void ConstructL( TBuf8<KMceMaxSdpNameLength> aSdpName);

	    /**

	    * Sets the sdp name.

	    * @param aSdpName the sdp name

	    */

	    void SetSdpNameL( const TDesC8& aSdpName );

		//for testing

	    MCE_UNIT_TEST_DEFS	    

    };

#endif      

// End of File