/*

* Copyright (c) 2002-2007 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 class takes snapshot and resizes bitmap if needed.

*

*/

//  INCLUDE FILES

#include <logger.h>

#include "cmmasnapshot.h"

#include "mmmaguiplayer.h"

#include "mmmasnapshotreadycallback.h"

#include "mmmasnapshot.h"

// CONSTANTS

const TInt KIgnoreSize = -1;

// CONSTRUCTION

CMMASnapshot* CMMASnapshot::NewL(MMMAGuiPlayer* aGuiPlayer,

                                 MMMASnapshotReadyCallback& aCallBack)

{

    CMMASnapshot* self = new(ELeave) CMMASnapshot(aGuiPlayer,

            aCallBack);

    CleanupStack::PushL(self);

    self->ConstructL();

    CleanupStack::Pop(); // self

    return self;

}

CMMASnapshot::~CMMASnapshot()

{

    if (iScaler)

    {

        iScaler->Cancel();

        delete iScaler;

    }

    if (iEncoder)

    {

        iEncoder->Cancel();

        delete iEncoder;

    }

    delete iBitmap;

    delete iBuffer;

    delete iSettings;

}

void CMMASnapshot::ConstructL()

{

    CActiveScheduler::Add(this);

    iScaler = CBitmapScaler::NewL();

}

CMMASnapshot::CMMASnapshot(MMMAGuiPlayer* aGuiPlayer,

                           MMMASnapshotReadyCallback& aCallBack):

        CActive(EPriorityStandard),

        iEncoding(MMMASnapshot::EBitmap),

        iCallBack(aCallBack),

        iState(EIdle)

{

    iGUIPlayer = aGuiPlayer;

}

void CMMASnapshot::TakeSnapShotL(const TDesC& aProperties)

{

    // snapshot sequence is not finished

    __ASSERT_DEBUG(iState == EIdle, User::Invariant());

    // image buffer must be taken with ImageBuffer before taking new snapshot

    __ASSERT_DEBUG(iBuffer == NULL, User::Invariant());

    CMMAImageSettings* settings

    = TMMAParameterValidator::ValidateImagePropertiesL(aProperties);

    CleanupStack::PushL(settings);

    delete iSettings;

    CleanupStack::Pop(settings);

    iSettings = settings;

    // take snapshot from player. RunL is called when image is ready

    // or error occures

    iState = ETakingSnapshot;

    TSize snapshotSize(iSettings->iWidth, iSettings->iHeight);

    iEncoding = iGUIPlayer->SnapshoterL()->TakeSnapshotL(&iStatus,

                snapshotSize,

                *iSettings);

    SetActive();

}

HBufC8* CMMASnapshot::ImageBuffer()

{

    // this must not be called when snapshot sequence is running

    __ASSERT_DEBUG(iState == EIdle, User::Invariant());

    HBufC8* buffer = iBuffer;

    // caller takes ownership of the buffer

    iBuffer = NULL;

    return buffer;

}

void CMMASnapshot::ResizeL()

{

    iState = EResizing;

    TSize imageSize(iBitmap->SizeInPixels());

    if (iSettings->iWidth != KIgnoreSize)

    {

        imageSize.iWidth = iSettings->iWidth;

    }

    if (iSettings->iHeight != KIgnoreSize)

    {

        imageSize.iHeight = iSettings->iHeight;

    }

    if (imageSize == iBitmap->SizeInPixels())

    {

        // no user resizing needed, continue sequence

        EncodeL();

    }

    else

    {

        iScaler->Scale(&iStatus, *iBitmap, imageSize, EFalse);

        SetActive();

    }

}

void CMMASnapshot::EncodeL()

{

    // CImageEncoder cannot be reused, so have to make it every time

    CImageEncoder* encoder = CImageEncoder::DataNewL(iBuffer, *iSettings->iMimeType);

    delete iEncoder;

    iEncoder = encoder;

    iState = EEncoding;

    iEncoder->Convert(&iStatus, *iBitmap, iSettings->iImageData);

    SetActive();

}

void CMMASnapshot::Completed(TInt aError)

{

    iStatus = aError;

    iCallBack.SnapshotReady();

}

void CMMASnapshot::RunL()

{

    if (iStatus != KErrNone)

    {

        // Error has occured, inform java side and change state

        iState = EIdle;

        Completed(iStatus.Int());

        return;

    }

    switch (iState)

    {

    case ETakingSnapshot:

    {

        if (iEncoding == MMMASnapshot::EEncoded)

        {

            // take encoded image from player.

            // Ownership transfers to this class.

            iBuffer = iGUIPlayer->SnapshoterL()->SnapshotEncoded();

            if (!iBuffer)

            {

                // error has occured with taking image

                Completed(KErrNotFound);

            }

            // Image is ready, update internal state and inform listener

            // Encoded images are not resized

            iState = EIdle;

            Completed(KErrNone);

        }

        else

        {

            // take bitmap from player.

            // Ownership transfers to this class.

            iBitmap = iGUIPlayer->SnapshoterL()->SnapshotBitmap();

            if (!iBitmap)

            {

                // error has occured with taking image

                Completed(KErrNotFound);

            }

            // Continue to next state

            ResizeL();

        }

        break;

    }

    case EResizing:

    {

        // Continue to next state

        EncodeL();

        break;

    }

    case EEncoding:

    {

        delete iEncoder;

        iEncoder = NULL;

        delete iBitmap;

        iBitmap = NULL;

        iState = EIdle;

        // encoding is ready, inform listener

        Completed(KErrNone);

        break;

    }

    default:

    {

        // unknown state

        __ASSERT_DEBUG(EFalse, User::Invariant());

    }

    }

}

TInt CMMASnapshot::RunError(TInt aError)

{

    // Reset state

    iState = EIdle;

    // Pass error code to observer

    Completed(aError);

    return KErrNone;

}

void CMMASnapshot::DoCancel()

{

    // snapshot taking cannot be cancelled

    if (iScaler)

    {

        iScaler->Cancel();

    }

    if (iEncoder)

    {

        iEncoder->Cancel();

    }

    iState = EIdle;

}

//  END OF FILE