/*

* 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 CMCEAUDIOSDPCODEC_H

#define CMCEAUDIOSDPCODEC_H

#include "mcemediasdpcodec.h"

class CMceComAudioStream;

class CMceComAudioCodec;

#define MCE_SDP_STRING_AUDIOL()\

        SdpCodecStringPool::StringPoolL().StringF( \

        SdpCodecStringConstants::EMediaAudio,\

        SdpCodecStringPool::StringTableL() )

/**

 * 

 *

 * @lib 

 */

class CMceAudioSdpCodec: public CMceMediaSdpCodec

    {

    public://constructor and destructor

        /**

        * Constructor

        */

        static CMceAudioSdpCodec* NewL();

        /**

        * Destructor

        */

        ~CMceAudioSdpCodec();

    public: //from CMceSdpCodec

        /**

        * Returns ETrue, if media is encoded by this codec

        * @return ETrue, if media is encoded by this codec

        */

        TBool Encodes( const CMceComMediaStream& aStream ) const;

    public: //from CMceMediaSdpCodec

        /**

        * Returns codecs

        * @param aStream media stream

        * @param return codecs

        * @leave if stream type does not macth codecs

        */

        const RPointerArray<CMceComCodec>& CodecsL( CMceComMediaStream& aStream ) const;

        /**

        * Encodes rtpmap -attribute

        * @param aCodec codec encoded to rtpmap

        * @leave system wide error

        */

        CSdpFmtAttributeField* EncodeRtpmapAttributeLC( CMceComCodec& aCodec ) const;

        /**

        * Encodes media related attributes

        * @param aCodec the codec

        * @param aMediaLine media line

        * @param aRtpmap rtpmap attribute

        * @leave system wide error

        */

        void EncodeMediaAttributesL( CMceComCodec& aCodec, 

                                     CSdpMediaField& aMediaLine, 

                                     CSdpFmtAttributeField& aRtpmap ) const;

        /**

        * Decodes media related attributes

        * @param aMediaLine media line

        * @param aCodec the codec

        * @leave system wide error

        */

       	void DecodeMediaAttributesL( CSdpMediaField& aMediaLine, 

                                     CMceComCodec& aCodec,

                                     CSdpFmtAttributeField& aRtpmap ) const;

        /**

        * Creates media stream based on sdp type

        * @param aType the sdp type sendrecv, sendonly or receive only

        * @return media stream

        * @leave system wide error

        */

        CMceComMediaStream* CreateStreamLC( TInt aType ) const;

        /**

        * Updates media based on received offer

        * @param aStream media stream

        * @param aDirection the direction 

        * @leave system wide error

        */

        void UpdateStreamL( CMceComMediaStream& aStream, TInt aDirection ) const;

        /**

        * Creates codec based on rtpmap line

        * @param aRtpmap rtpmap line

        * @return codec or NULL, if not supported

        * @leave system wide error

        */

        CMceComCodec* CreateCodecLC( CSdpFmtAttributeField& aRtpmap ) const;

        /**

        * Creates codec based on payload type

        * @param aPayload payload

        * @param aMediaLine media line

        * @return codec or NULL, if not supported

        * @leave system wide error

        */

        CMceComCodec* CreateCodecLC( TUint aPayload, CSdpMediaField& aMediaLine ) const;

        /**

        * Decodes session level media attributes

        * @param aStream media stream

        * @param aSdpDocument sdp document

        * @return codec or NULL, if not supported

        * @leave system wide error

        */

        void DecodeSessionMediaAttributesL( CMceComMediaStream& aStream, 

                                            CSdpDocument& aSdpDocument ) const;

    private:

        /**

        * C++ Constructor

        * @param aMedia media

        */

        CMceAudioSdpCodec( RStringF aMedia );

        /**

        * Creates uplink audio stream with mic and rtp sink

        * @return uplink audio stream

        */

        CMceComAudioStream* CreateUplinkStreamL() const;

        /**

        * Creates downlink audio stream with rtp source and speaker

        * @return downlink audio stream

        */

        CMceComAudioStream* CreateDownlinkStreamL() const;

    };

#endif //CMCEAUDIOSDPCODEC_H