/*

* Copyright (c) 2004 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:  Header file for AMR audio codec data class

*

*/

#ifndef CCMRAMRNBCODECDATA_H

#define CCMRAMRNBCODECDATA_H

// INCLUDES

#include "CCMRAudioCodecData.h"

// CONSTANTS

// this is the max buffer size that the corresponding HW codec implementation will output, so it is not necessarily == 1 * AMR framelength

const TInt KCMRMaxAMRNBBufferLength = 32;

// Uid of the AMRNB CMMFCodec

const TUid KCMRAMRSWCodecUid = {0x101FAF68};    //KAdvancedUidCodecPCM16ToAMR

// FORWARD DECLARATIONS

class TCMRAudioEncParams;

// CLASS DECLARATION

/**

*  Base class for audio codec data

*

*  @lib

*  @since 2.6

*/

class CCMRAMRNBCodecData : public CCMRAudioCodecData

    {

    public:  // Constructors and destructor

        /**

        * C++ default constructor.

        */

        CCMRAMRNBCodecData(TCMRCodecType aType);

        /**

        * Destructor.

        */

        virtual ~CCMRAMRNBCodecData();

    public: // functions from baseclass

        /**

        * From CCMRAudioCodecData Check if the codec is supported in this configuration

        * @return TBool ETrue if supported

        */

        TBool Supported();

        /**

        * Return preferred duration of PCM capture in microseconds, relevant only for CMMFCodecs

        * @return TReal duration in milliseconds

        */

        TReal GetPCMCaptureDurationMs() const;

        /**

        * From CCMRAudioCodecData Set bitrate for the codec

        * @param aBitRate in bps

        * @return void

        */

        void SetBitRateL(TInt aBitRate);

        /**

        * From CCMRAudioCodecData Get the current bitrate

        * @return TInt bitrate in bps

        */

        TInt GetBitRateL() const;

        /**

        * From CCMRAudioCodecData Get the configuration parameters for the codec

        * @param aDataSource    MMF audio input

        * @return TDes8* configuration parameter structure

        */

        TDes8* GetCodecConfigParamL(MDataSource* aDataSource);

        /**

        * From CCMRAudioCodecData Reads the framelength from the header of the given buffer

        * @param const TUint8* aBuf

        * @param TInt aDataLen

        * @return TInt frame length in bytes

        */

        TInt FrameLength( const TUint8* aBuf, TInt aDataLen  ) const;

        /**

        * From CCMRAudioCodecData Get the max frame length (single coded frame)

        * @return TInt framelength in bytes

        */

        TInt MaxFrameLengthL() const;

        /**

        * From CCMRAudioCodecData Returns the max used buffer length for this codec. Client can then e.g. allocate buffers based on it

        * @return TInt Max frame length in bytes

        */

        TInt inline MaxBufferLength() const { return KCMRMaxAMRNBBufferLength; };

        /**

        * From CCMRAudioCodecData Configures sample DevSound HW device

        * @return TInt error code

        */

        TInt AudioHWConfigL(MDataSource* aDataSource, const TDesC8& aParams );

        /**

        * From CCMRAudioCodecData Configures sample DevSound HW device

        * @return TUid Uid

        */

        inline TUid SWCodecUid() {return KCMRAMRSWCodecUid;} ;

        /**

        * From CCMRAudioCodecData Preferred samplecount per inputbuffer.

        * @return TInt samplecount.

        */

        TInt PreferredSampleCountPerInputBuffer();

        /**

        * Get the preferred framecount per PCM inputbuffer.

        * @return TInt samplecount.

        */

        TInt PreferredFrameCountPerInputBuffer();

    };

#endif      // CCMRAMRNBCODECDATA_H

// End of File