/*

* 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:  call status handling. 

*

*/

// INCLUDE FILES

#include "btmcphonestatus.h"

#include "btmcvolume.h"

#include <mmkeybearerscancodes.h> // for volume pubsub

#include <mediakeysinternalpskeys.h>

#include <MediaStreamPropertiesPSKeys.h> // for current volume pubsub

#include <mmf/server/sounddevice.h>

#include <e32math.h>

#include "debug.h"

const TInt KNoAudioStreaming = -1;

const TInt KMaxHfVol = 15;

const TInt KSpeakerVolumeSubscribeService = 30;

const TInt KDefaultStep = 1000;

// -----------------------------------------------------------------------------

// CBtmcVolume::NewL

// -----------------------------------------------------------------------------

CBtmcVolume* CBtmcVolume::NewL(CBtmcPhoneStatus& aParent)

    {

    CBtmcVolume* self = new(ELeave) CBtmcVolume(aParent);

    CleanupStack::PushL(self);

    self->ConstructL();

    CleanupStack::Pop(self);

    return self;

    }

// -----------------------------------------------------------------------------

// CBtmcVolume::~CBtmcVolume

// -----------------------------------------------------------------------------

CBtmcVolume::~CBtmcVolume()

    {

    TRACE_FUNC_ENTRY

    delete iActive;

    iVolLevelProperty.Close();

    iVolKeyEventProperty.Close();

    TRACE_FUNC_EXIT

    }

void CBtmcVolume::SetSpeakerVolumeL(TInt aHfVol)

    {

    TRACE_FUNC

    TRACE_INFO((_L("current vols phone %d, acc %d"), iPhnSpkrVol, iAccSpkrVol))

    // Store the new volume setting of headset regardless of 

    // whether volume control is active or not currently

    iAccSpkrVol = HfToPhoneVolScale(aHfVol);

    TRACE_INFO((_L("new acc vol %d"), iAccSpkrVol))

    if ( IsActiveRemoteVolumeControl() )

        {

        TInt vol = GetNewPhoneVol();

        if (vol != KNoAudioStreaming)

            {

            TInt prevPhVol = iPhnSpkrVol;

            iPhnSpkrVol = vol;

            DoSetSpeakerVolL( prevPhVol );

            }

        }

    }

void CBtmcVolume::SetMicrophoneVolumeL(TInt /*aHfVol*/)

    {

    return;

    }

void CBtmcVolume::ActivateRemoteVolumeControl()

    {

    TRACE_FUNC

    if (!IsActiveRemoteVolumeControl() )

        {

		iVolLevelProperty.Subscribe(iActive->iStatus);     

        iActive->GoActive();

        TInt vol = GetNewPhoneVol();

        TRACE_INFO((_L("current phone vol %d, acc vol %d"), vol, iAccSpkrVol))

        if (vol != KNoAudioStreaming)

            {

            iPhnSpkrVol = vol;

            if (iAccSpkrVol != vol)

                {

        		TRAP_IGNORE(iParent.HandleSpeakerVolumeEventL(PhoneToHfVolScale(iPhnSpkrVol)));

        		iAccSpkrVol = iPhnSpkrVol;

                }

            }

        }

    }

void CBtmcVolume::DeActivateRemoteVolumeControl()

    {

    iActive->Cancel();

    TRACE_FUNC

    }

void CBtmcVolume::RequestCompletedL(CBtmcActive& aActive, TInt aErr)

    {

    TRACE_FUNC_ENTRY

    TRACE_INFO((_L("aErr %d, INTERNAL ACTION STATE %d"), aErr, iAction))

    switch (aActive.ServiceId())

        {

        case KSpeakerVolumeSubscribeService:

            {

            if(!aErr)

                {

				iVolLevelProperty.Subscribe(aActive.iStatus);

				aActive.GoActive();

                TInt vol = GetNewPhoneVol();

                TRACE_INFO((_L("new phone vol %d, acc vol %d"), vol, iAccSpkrVol))

                if (vol != KNoAudioStreaming)

                    {

                    TInt prevPhVol = iPhnSpkrVol;

                    iPhnSpkrVol = vol;

                    if (iAction == ESpeakerVolSubscribe && iPhnSpkrVol != iAccSpkrVol)

                        {

                        iParent.HandleSpeakerVolumeEventL(PhoneToHfVolScale(iPhnSpkrVol));

                        iAccSpkrVol = iPhnSpkrVol;

                        }

                    else if (iAction == ESpeakerVolSet)

                        {

                        DoSetSpeakerVolL( prevPhVol );

                        }

                    }

                }

            break;

            }

        default:

            break;

        }

    TRACE_FUNC_EXIT

    }

void CBtmcVolume::CancelRequest(TInt aServiceId)

    {

    switch (aServiceId)

        {

        case KSpeakerVolumeSubscribeService:

            {

            iVolLevelProperty.Cancel();

            break;

            }

        default:

            break;

        }

    }

// -----------------------------------------------------------------------------

// CBtmcVolume::CBtmcVolume

// -----------------------------------------------------------------------------

CBtmcVolume::CBtmcVolume(CBtmcPhoneStatus& aParent)

    : iParent(aParent), iAccSpkrVol(KNoAudioStreaming), iStep(KDefaultStep)

    {

    }

// -----------------------------------------------------------------------------

// CBtmcVolume::ConstructL

// -----------------------------------------------------------------------------

void CBtmcVolume::ConstructL()

    {

    TRACE_FUNC_ENTRY

    LEAVE_IF_ERROR(iVolLevelProperty.Attach(KPSUidMediaStreamProperties, KMediaStreamCurrentVolume))

    LEAVE_IF_ERROR(iVolKeyEventProperty.Attach(KPSUidMediaKeysEventNotifier, KMediaKeysAccessoryVolumeEvent))

    CMMFDevSound* devSound  = CMMFDevSound::NewL();

    iMaxSpkrVol = devSound->MaxVolume();

    TRACE_INFO((_L("Maximum volume is %d"), iMaxSpkrVol))

    delete devSound;

    iPhnSpkrVol = GetNewPhoneVol();

    iActive = CBtmcActive::NewL(*this, CActive::EPriorityStandard, KSpeakerVolumeSubscribeService);

    TRACE_FUNC_EXIT

    }

// -----------------------------------------------------------------------------

// CBtmcVolume::DoSetSpeakerVolL

// -----------------------------------------------------------------------------

//

void CBtmcVolume::DoSetSpeakerVolL( TInt aPrevPhVol )

    {

    TRACE_FUNC_ENTRY     

    TInt volClick( 0 );

    TInt diff1;

    TInt diff2;

    if( ( aPrevPhVol >= iAccSpkrVol && iPhnSpkrVol <= iAccSpkrVol ) ||

        ( aPrevPhVol <= iAccSpkrVol && iPhnSpkrVol >= iAccSpkrVol ) )

        {

        diff1 = Abs( aPrevPhVol - iAccSpkrVol );

        diff2 = Abs( iPhnSpkrVol - iAccSpkrVol );

        if (diff2 > diff1)

            {

            // the previous phone volume is closer to current headset volume setting

            volClick = ( aPrevPhVol < iPhnSpkrVol ) ? KPSVolumeDownClicked : KPSVolumeUpClicked;

            }

        else if ( (diff2 == diff1) && (diff1 !=0) )

            {

            volClick = ( aPrevPhVol < iPhnSpkrVol ) ? KPSVolumeDownClicked : KPSVolumeUpClicked;

            }

        // otherwise we have roughly synchronized vol in both ends.

        }

    else if( iAccSpkrVol != iPhnSpkrVol )

        {

        TInt step = Abs( iPhnSpkrVol - aPrevPhVol );

        if( step )

            {

            // Only update step value if it is not equal to zero

            iStep = step;

            }

        diff1 = Abs( iPhnSpkrVol - iAccSpkrVol );

        if( iAccSpkrVol > iPhnSpkrVol )

            {

            // We are going upward

            diff2 = Abs( (iPhnSpkrVol + iStep) - iAccSpkrVol );

            }

        else

            {

            // We are going downward

            diff2 = Abs( (iPhnSpkrVol - iStep) - iAccSpkrVol );

            }

        if( diff2 <= diff1 )

            {

            volClick = (iAccSpkrVol > iPhnSpkrVol) ? KPSVolumeUpClicked : KPSVolumeDownClicked;

            }        

        }

    TInt err( KErrNotFound );

    if( volClick )

        {

        err = iVolKeyEventProperty.Set( volClick );

        TRACE_INFO((_L("Set KMediaKeysVolumeKeyEvent click %d err %d"), volClick, err));

        }

    iAction = err ? ESpeakerVolSubscribe : ESpeakerVolSet;

    TRACE_FUNC_EXIT 

    }

// -------------------------------------------------------------------------------

// CBtmcVolume::HfToPhoneVolScale

// Converts volume level scale used in AT command VGS (0-15) into one used in

// DevSound Audio (0-MaxVol).

// -------------------------------------------------------------------------------

TInt CBtmcVolume::HfToPhoneVolScale(TInt aHfVol)

    {

 	TReal tgt;

 	TReal src(aHfVol);

 	TReal maxAG(iMaxSpkrVol);

 	TReal maxHF(KMaxHfVol);

 	TReal scale = maxAG/maxHF;

	Math::Round( tgt, src*scale, 0);

	TRACE_INFO((_L("HfToPhoneVolScale: HF %d is AG %d"), aHfVol, TInt(tgt)))

	return TInt(tgt);

    }

// -------------------------------------------------------------------------------

// CBtmcVolume::PhoneToHfVolScale

//

// Converts volume level scale used in DevSound Audio (0-10) into one used in AT command

// VGS (0-15).

// -------------------------------------------------------------------------------

TInt CBtmcVolume::PhoneToHfVolScale(TInt aPhoneVol)

    {

 	TReal tgt;

 	TReal src(aPhoneVol);

 	TReal maxAG(iMaxSpkrVol);

 	TReal maxHF(KMaxHfVol);

 	TReal scale = maxHF/maxAG;

	Math::Round( tgt, src*scale, 0);

	TRACE_INFO((_L("PhoneToHfVolScale: HF %d is AG %d"), TInt(tgt), aPhoneVol))

	return TInt(tgt);

    }

TInt CBtmcVolume::GetNewPhoneVol()

    {

    TInt vol = KNoAudioStreaming;

    iVolLevelProperty.Get(vol);

    TRACE_INFO((_L("phone vol P&S %d"), vol))

    return vol;

    }

TInt CBtmcVolume::GetVolume()

	{

    iPhnSpkrVol = GetNewPhoneVol();

	if (iPhnSpkrVol != KNoAudioStreaming)

	    return PhoneToHfVolScale(iPhnSpkrVol);

	return iPhnSpkrVol;

	}

TBool CBtmcVolume::IsActiveRemoteVolumeControl()

    {

    return iActive->IsActive();

    }

// End of file