/*

* 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:  This file contains the base class from which specific audio

*                output classes are derived. This class encapsulates common

*                behavior for all audio outputs. An audio output class serves as

*                the interface between the controller and the lower-level sound

*                producing interface.

*

*/

#ifndef CADVANCEDAUDIOOUTPUT_H

#define CADVANCEDAUDIOOUTPUT_H

//  INCLUDES

#include <e32base.h>

//#include <e32std.h>

//#include <MmfControllerFrameworkBase.h>

//#include <MmfControllerFramework.h>

//#include <MmfBase.h>

#include "AdvancedAudioDecoder.h"

#include "DataSourceAdapter.h"

// CLASS DECLARATION

/**

* Mixin observer class to define an object capable of handling a callback from

* AdvancedAudioOutput.

*

* @lib AdvancedAudioOutput.lib

* @since 3.0

*/

class MAdvancedAudioOutputObserver

    {

    public:

        /**

        *

        * Callback function from CAdvaincedAudioOuput when the given buffer needs to

        * be refilled (read to external storage)

        * @param   refillBuffer  data buffer to be filled with new data

        * @return  errCode  KErrNone (0)

        *

        */

        virtual TInt RefillBuffer( CMMFBuffer* aRefillBuffer/*, TBool aDoSynchronousRead = EFalse */) = 0;

        /**

        *

        * Callback function from CAdvancedAudioOuput to indicate playback is completed

        * @param   none

        * @return  void

        *

        */

        virtual void PlaybackComplete() = 0;

        /**

        *

        * Callback function from CDevSoundAudioInput to handle specified event

        * @param   aEvent  the event to be handled

        * @return  void

        *

        */

        virtual void SendEvent( const TMMFEvent& aEvent ) = 0;

        /**

        *

        * Callback function from CAdvancedAudioOuput when lastbuffer is sent 

        * during a loopplay by setting the Last Buffer flag to EFalse

        * @param   none

        * @return  void

        *

        */

        virtual void LastBufferSent() = 0;

    };

/**

*  This is the base class for all audio output classes, used for playback.

*  It contains common behaviour for all audio outputs. The audio output class

*  provides the interface between the Controller and the sound output device.

*

*  @lib AdvancedAudioController.lib

*  @since 3.0

*/

class CAdvancedAudioOutput : public CBase,

							 public MAdvancedAudioDecoderObserver

    {

    public: // New functions

        /**

        * Prepares the resources for playback.

        * @since 3.0

        * @param none

        * @return void

        */

        IMPORT_C virtual void PrimeL() = 0;

        /**

        * Pauses the playback.

        * @since 3.0

        * @param none

        * @return void

        */

        IMPORT_C virtual void PauseL() = 0;

        /**

        * Initiates playback.

        * @since 3.0

        * @param aBuffer buffer to be played

        *        aIndex index of the buffer to be played

        * @return void

        */

        IMPORT_C virtual void PlayL( TAny* aBuffer, TInt aIndex ) = 0;

        /**

        * Stops playback.

        * @since 3.0

        * @param none

        * @return void

        */

        IMPORT_C virtual void StopL(TBool aStopDevsound=ETrue) = 0;

        /**

        * Returns the max volume.

        * @since 3.0

        * @param none

        * @return max volume

        */

		IMPORT_C virtual TInt MaxVolumeL() = 0;

        /**

        * Sets the volume.

        * @since 3.0

        * @param aVolume volume to be set

        * @return void

        */

        IMPORT_C virtual void SetVolumeL( TInt /*aVolume*/ ) = 0;

        /**

        * Returns the current volume.

        * @since 3.0

        * @param none

        * @return current volume

        */

        IMPORT_C virtual TInt VolumeL() = 0;

        /**

		* Sets the source priority settings if a priority mechanism is required

		* to arbitrate between multiple clients trying to access the same resource.

		* Sets the priority for the source and the sink (provided they are defined).

		* @since 3.0

        * @param aPrioritySettings priority settings

        * @return void

        */

        IMPORT_C virtual void SetPrioritySettingsL( const TMMFPrioritySettings& /*aPrioritySettings*/ ) = 0;

        /**

        * Returns the audio output position in microseconds.

        * @since 3.0

        * @param none

        * @return input output

        */

        IMPORT_C virtual TInt64 CalculateAudioOutputPositionL() const = 0;

        /**

        * Returns the currently configured rates.

        * @since 3.0

        * @param aRates on return, configured rates

        * @return void

        */

        IMPORT_C virtual void ConfigRatesL( RArray<TUint>& aRates ) = 0;

        /**

        * Returns the currently configured channels.

        * @since 3.0

        * @param aChannels on return, configured channels

        * @return void

        */

        IMPORT_C virtual void ConfigChannelsL( RArray<TUint>& aChannels ) = 0;

        /**

        * Returns the currently configured data types.

        * @since 3.0

        * @param aDataTypes on return, configured data types

        * @return void

        */

        IMPORT_C virtual void ConfigDataTypesL( RArray<TFourCC>& aDataTypes ) = 0;

        /**

        * Returns the supported rates.

        * @since 3.0

        * @param aRates on return, supported rates

        * @return void

        */

        IMPORT_C virtual void CapabilitiesRatesL( RArray<TUint>& aRates ) = 0;

        /**

        * Returns the supported channels.

        * @since 3.0

        * @param aChannels on return, supported channels

        * @return void

        */

        IMPORT_C virtual void CapabilitiesChannelsL( RArray<TUint>& aChannels ) = 0;

        /**

        * Returns the supported data types.

        * @since 3.0

        * @param aDataTypes on return, supported data types

        * @return void

        */

        IMPORT_C virtual void CapabilitiesDataTypesL( RArray<TFourCC>& aDataTypes ) = 0;

        /**

        * Sets the volume ramp.

        * @since 3.0

        * @param aRampDuration duration over which the volume is to be increased in microseconds

        * @return void

        */

        IMPORT_C virtual void SetVolumeRampL( const TTimeIntervalMicroSeconds& aRampDuration ) = 0;

        /**

        * Sets the balance.

        * @since 3.0

        * @param aLeftPercentage percentage of balance to be played on left

        * @param aRightPercentage percentage of balance to be played on right

        * @return void

        */

        IMPORT_C virtual void SetPlayBalanceL( TInt aLeftPercentage, TInt aRightPercentage ) = 0;

        /**

        * Returns the current balance percentages.

        * @since 3.0

        * @param aLeftPercentage on return, percentage of balance to be played on left

        * @param aRightPercentage on return, percentage of balance to be played on right

        * @return void

        */

        IMPORT_C virtual void GetPlayBalanceL( TInt& aLeftPercentage, TInt& aRightPercentage ) = 0;

        /**

        * Sets the configuration parameters for recording.

        * @since 3.0

        * @param aSampleRate sample rate

        * @param aNumChannel number of channels

        * @param aFourCC data type

        * @param aCodecConfigData codec configuration data

        * @return void

        */

        IMPORT_C virtual void ConfigureL( TUint aSampleRate, TUint aNumChannel, TFourCC aFourCC,

                                          const RArray<TInt>& aCodecConfigData ) = 0;

        /**

        * Sets the Decoder instance to be used by the audio output.

        * @since 3.0

        * @param aDecoder Decoder instance

        * @return void

        */

        IMPORT_C virtual void SetDecoder( CAdvancedAudioDecoder* aDecoder ) = 0;

        IMPORT_C virtual void Resume(TInt aBufferIndex = -1) = 0;

        IMPORT_C virtual void IsLoopPlayEnabled(const TBool aLoopPlayEnabled) = 0;

        IMPORT_C virtual void UnSetLastBuffer(const TBool aUnSetLastBuffer) = 0;

        IMPORT_C virtual TBool IsDSStopped() = 0;

        /**

        * Sets the DataAdapter instance to be used by the audio output.

        * @param aDataSourceAdapter DataSourceAdapter instance

        * @return void

        */

        IMPORT_C virtual void SetDataSourceAdapter(CDataSourceAdapter* aDataSourceAdapter) = 0;

	protected: // Data

        // pointer to AdvancedAudioOutput observer

        MAdvancedAudioOutputObserver* iObserver;

        // pointer to an audio decoder

        CAdvancedAudioDecoder* iAdvancedAudioDecoder;

        CDataSourceAdapter* iDataSourceAdapter;

        CMMFBuffer* iSavedBufferPtr;

	};

#endif		// CADVANCEDAUDIOOUTPUT_H