/*

* Copyright (c) 2009 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:

*

*/

#include <xqserviceutil.h>

#include "cxeenginesymbian.h"

#include "cxecameradevicecontrolsymbian.h"

#include "cxestillcapturecontrolsymbian.h"

#include "cxevideocapturecontrolsymbian.h"

#include "cxesettingscontrolsymbian.h"

#include "cxeviewfindercontrolsymbian.h"

#include "cxesnapshotcontrol.h"

#include "cxefilenamegeneratorsymbian.h"

#include "cxeautofocuscontrolsymbian.h"

#include "cxezoomcontrolsymbian.h"

#include "cxequalitypresetssymbian.h"

#include "cxutils.h"

#include "cxesettingsimp.h"

#include "cxefeaturemanagerimp.h"

#include "cxesettingsmodelimp.h"

#include "cxesettingscenrepstore.h"

#include "cxesoundplayersymbian.h"

#include "cxesensoreventhandlersymbian.h"

#include "cxefilesavethread.h"

#include "cxecameradevice.h"

#include "cxememorymonitor.h"

#include "cxediskmonitor.h"

#include "OstTraceDefinitions.h"

#ifdef OST_TRACE_COMPILER_IN_USE

#include "cxeenginesymbianTraces.h"

#endif

//  Member Functions

CxeEngineSymbian::CxeEngineSymbian()

    : mCameraDeviceControl(NULL),

      mCameraDevice(NULL),

      mViewfinderControl(NULL),

      mSnapshotControl(NULL),

      mStillCaptureControl(NULL),

      mVideoCaptureControl(NULL),

      mSettingsControl(NULL),

      mAutoFocusControl(NULL),

      mZoomControl(NULL),

      mSettings(NULL),

      mFeatureManager(NULL),

      mSettingsModel(NULL),

      mFilenameGenerator(NULL),

      mSensorEventHandler(NULL),

      mQualityPresets(NULL),

      mFileSaveThread(NULL),

      mDiskMonitor(NULL),

      mMemoryMonitor(NULL)

{

    CX_DEBUG_IN_FUNCTION();

}

/*!

    Create all control classes and connect relevant signals

*/

void CxeEngineSymbian::construct()

{

    CX_DEBUG_ENTER_FUNCTION();

    createControls();

    connectSignals();

    CX_DEBUG_EXIT_FUNCTION();

}

/*!

    Create all control classes.

    Note: Throws an error, if free memory request by CxeMemoryMonitor constructor fails!

*/

void CxeEngineSymbian::createControls()

{

    CX_DEBUG_ENTER_FUNCTION();

    // Check we do this only once.

    if (!mSettingsModel) {

        OstTrace0(camerax_performance, CXEENGINESYMBIAN_CREATECONTROLS_IN, "e_CX_ENGINE_CREATE_CONTROLS 1");

        CxeCameraDeviceControlSymbian *deviceControl = new CxeCameraDeviceControlSymbian();

        mCameraDeviceControl = deviceControl;

        mCameraDevice = deviceControl->cameraDevice();

        CX_ASSERT_ALWAYS(mCameraDeviceControl);

        CX_ASSERT_ALWAYS(mCameraDevice);

        mCameraDeviceControl->init();

        CxeSettingsCenRepStore *settingsStore(NULL);

        if (XQServiceUtil::isService()) {

            settingsStore = new CxeSettingsLocalStore();

        } else {

            settingsStore = new CxeSettingsCenRepStore();

        }

        //ownership of settings store transferred to the settings model.

        mSettingsModel = new CxeSettingsModelImp(settingsStore);

        // assert if settings model fails to intialize

        CX_DEBUG_ASSERT(mSettingsModel);

        mSettings = new CxeSettingsImp(*mSettingsModel);

        //! @todo a temporary hack to change the startup sequence to avoid GOOM problems

        static_cast<CxeSettingsImp*>(mSettings)->loadSettings(mode());

        // Connect P&S key updates to settings signal.

        connect(settingsStore, SIGNAL(settingValueChanged(long int, unsigned long int, QVariant)),

                mSettings, SIGNAL(settingValueChanged(long int, unsigned long int, QVariant)));

        mFeatureManager = new CxeFeatureManagerImp(*mSettingsModel);

        // Memory monitor needed as early as possible to request free memory.

        // Note: Throws error if enough memory cannot be freed!

        mMemoryMonitor = new CxeMemoryMonitor(*mFeatureManager);

        mDiskMonitor = new CxeDiskMonitor(*mSettings);

        mQualityPresets = new CxeQualityPresetsSymbian(*mSettings);

        CX_DEBUG_ASSERT(mQualityPresets);

        // sensor event handler initialization

        mSensorEventHandler = new CxeSensorEventHandlerSymbian();

        mFilenameGenerator = new CxeFilenameGeneratorSymbian(*mSettings,

            mode());

        mViewfinderControl = new CxeViewfinderControlSymbian(*mCameraDevice,

            *mCameraDeviceControl);

        mSnapshotControl = new CxeSnapshotControl(*mCameraDevice);

        mFileSaveThread = CxeFileSaveThreadFactory::createFileSaveThread();

        mStillCaptureControl = new CxeStillCaptureControlSymbian(

            *mCameraDevice, *mViewfinderControl, *mSnapshotControl, *mCameraDeviceControl,

            *mFilenameGenerator, *mSensorEventHandler, *mAutoFocusControl,

            *mSettings, *mQualityPresets, *mFileSaveThread, *mDiskMonitor);

        mZoomControl = new CxeZoomControlSymbian(

            *mCameraDevice, *mCameraDeviceControl, *mSettings, *mFeatureManager);

        mVideoCaptureControl = new CxeVideoCaptureControlSymbian(

            *mCameraDevice, *mViewfinderControl, *mSnapshotControl, *mCameraDeviceControl,

            *mFilenameGenerator, *mSettings, *mQualityPresets, *mDiskMonitor);

        mSettingsControl = new CxeSettingsControlSymbian(*mCameraDevice, *mSettings);

        OstTrace0(camerax_performance, CXEENGINESYMBIAN_CREATECONTROLS_OUT, "e_CX_ENGINE_CREATE_CONTROLS 0");

    }

    CX_DEBUG_EXIT_FUNCTION();

}

/*!

    Connect internal signals for control classes

*/

void CxeEngineSymbian::connectSignals()

{

    CX_DEBUG_ENTER_FUNCTION();

    OstTrace0(camerax_performance, CXEENGINESYMBIAN_CONNECTSIGNALS_IN, "e_CX_ENGINE_CONNECT_SIGNALS 1");

    // enabling scene setting change callbacks to Autofocus control

    connect(mSettings,

            SIGNAL(sceneChanged(CxeScene&)),

            mAutoFocusControl,

            SLOT(handleSceneChanged(CxeScene&)));

    // connecting Autofocus state change callbacks to stillcapturecontrol

    connect(mAutoFocusControl,

            SIGNAL(stateChanged(CxeAutoFocusControl::State, CxeError::Id)),

            mStillCaptureControl,

            SLOT(handleAutofocusStateChanged(CxeAutoFocusControl::State,CxeError::Id)));

    // Connect signals for ECam events

    connect(mCameraDeviceControl,

            SIGNAL(cameraEvent(int,int)),

            mSnapshotControl,

            SLOT(handleCameraEvent(int,int)));

    connect(mCameraDeviceControl,

            SIGNAL(cameraEvent(int,int)),

            mAutoFocusControl,

            SLOT(handleCameraEvent(int,int)));

    // Connect signal for device ready events

    connect(mCameraDeviceControl,

            SIGNAL(deviceReady()),

            this,

            SLOT(doInit()));

    // Connect image and video init complete signals to

    // CameraDeviceControl initModeComplete

    connect(mStillCaptureControl,

            SIGNAL(imagePrepareComplete(CxeError::Id)),

            mCameraDeviceControl,

            SIGNAL(initModeComplete(CxeError::Id)));

    connect(mVideoCaptureControl,

            SIGNAL(videoPrepareComplete(CxeError::Id)),

            mCameraDeviceControl,

            SIGNAL(initModeComplete(CxeError::Id)));

    // Zoom is prepared once the image/video emits prepare zoom signals

    connect(mStillCaptureControl,

            SIGNAL(prepareZoomForStill(int)),

            mZoomControl,

            SLOT(prepareZoomForStill(int)));

    connect(mVideoCaptureControl,

            SIGNAL(prepareZoomForVideo()),

            mZoomControl,

            SLOT(prepareZoomForVideo()));

    // Connect file saving thread to snapshot signals and video saved signal.

    // Image saving it handles internally.

    connect(mStillCaptureControl,

            SIGNAL(snapshotReady(CxeError::Id, const QPixmap&, int)),

            mFileSaveThread,

            SLOT(handleSnapshotReady(CxeError::Id, const QPixmap&, int)));

    connect(mVideoCaptureControl,

            SIGNAL(videoComposed(CxeError::Id, const QString&)),

            mFileSaveThread,

            SLOT(handleVideoSaved(CxeError::Id, const QString&)));

    connect(mVideoCaptureControl,

            SIGNAL(snapshotReady(CxeError::Id, const QPixmap&, const QString&)),

            mFileSaveThread,

            SLOT(handleSnapshotReady(CxeError::Id, const QPixmap&, const QString&)));

    OstTrace0(camerax_performance, CXEENGINESYMBIAN_CONNECTSIGNALS_OUT, "e_CX_ENGINE_CONNECT_SIGNALS 0");

    CX_DEBUG_EXIT_FUNCTION();

}

CxeEngineSymbian::~CxeEngineSymbian()

{

    CX_DEBUG_ENTER_FUNCTION();

    delete mAutoFocusControl;

    delete mZoomControl;

    delete mSettingsControl;

    delete mStillCaptureControl;

    delete mVideoCaptureControl;

    delete mSnapshotControl;

    delete mViewfinderControl;

    delete mFilenameGenerator;

    delete mDiskMonitor;

    delete mMemoryMonitor;

    delete mFeatureManager;

    delete mSettings;

    delete mSettingsModel;

    delete mCameraDeviceControl;

    delete mQualityPresets;

    delete mFileSaveThread;

    CX_DEBUG_EXIT_FUNCTION();

}

CxeCameraDeviceControl &CxeEngineSymbian::cameraDeviceControl()

{

    return *mCameraDeviceControl;

}

CxeViewfinderControl &CxeEngineSymbian::viewfinderControl()

{

    return *mViewfinderControl;

}

CxeSnapshotControl &CxeEngineSymbian::snapshotControl()

{

    return *mSnapshotControl;

}

CxeStillCaptureControl &CxeEngineSymbian::stillCaptureControl()

{

    return *mStillCaptureControl;

}

CxeVideoCaptureControl &CxeEngineSymbian::videoCaptureControl()

{

    return *mVideoCaptureControl;

}

CxeAutoFocusControl &CxeEngineSymbian::autoFocusControl()

{

    return *mAutoFocusControl;

}

CxeZoomControl &CxeEngineSymbian::zoomControl()

{

    return *mZoomControl;

}

// Get the settings handle

CxeSettings &CxeEngineSymbian::settings()

{

    return *mSettings;

}

// Get the sensor event  handle

CxeSensorEventHandler &CxeEngineSymbian::sensorEventHandler()

{

    return *mSensorEventHandler;

}

CxeFeatureManager &CxeEngineSymbian::featureManager()

{

    return *mFeatureManager;

}

/*!

* Get memory monitor utility handle.

*/

CxeMemoryMonitor &CxeEngineSymbian::memoryMonitor()

{

    return *mMemoryMonitor;

}

/*

* Returns true, if the engine is ready or else false.

*/

bool CxeEngineSymbian::isEngineReady()

{

    bool ready = false;

    if (mCameraDeviceControl->state() == CxeCameraDeviceControl::Ready &&

        mViewfinderControl->state() == CxeViewfinderControl::Running) {

        if (mode() == Cxe::ImageMode) {

            if (mStillCaptureControl->state() == CxeStillCaptureControl::Ready) {

                ready = true;

            }

        } else if (mode() == Cxe::VideoMode) {

            if (mVideoCaptureControl->state() == CxeVideoCaptureControl::Ready) {

                ready = true;

            }

        }

    }

    return ready;

}

/*!

    Prepare current capture control (CxeVideoCaptureControl in video mode,

    CxeStillCaptureControl in still image mode).

*/

void CxeEngineSymbian::doInit()

{

    CX_DEBUG_ENTER_FUNCTION();

    OstTrace0(camerax_performance, CXEENGINESYMBIAN_DOINIT_IN, "e_CX_ENGINE_DO_INIT 1");

    mFilenameGenerator->init(mode());

    // load settings whenever we change mode or start camera or switch camera

    CxeSettingsImp *settingsImp = qobject_cast<CxeSettingsImp*>(mSettings);

    if (settingsImp) {

        settingsImp->loadSettings(mode());

    }

    if (mode() == Cxe::ImageMode) {

        mVideoCaptureControl->deinit();

        mStillCaptureControl->init();

    } else if (mode() == Cxe::VideoMode) {

        mStillCaptureControl->deinit();

        mVideoCaptureControl->init();

    }

    OstTrace0(camerax_performance, CXEENGINESYMBIAN_DOINIT_OUT, "e_CX_ENGINE_DO_INIT 0");

    CX_DEBUG_EXIT_FUNCTION();

}

Cxe::CameraMode CxeEngineSymbian::mode() const

{

    return mCameraDeviceControl->mode();

}

/*!

    Check if we need to reserve camera.

*/

bool CxeEngineSymbian::reserveNeeded()

{

    // If camera device control is in Idle or pending release state,

    // we need to call reserve()

    return (mCameraDeviceControl->state() == CxeCameraDeviceControl::Idle ||

            mCameraDeviceControl->state() == CxeCameraDeviceControl::PendingRelease);

}

/*!

    Check if we need to prepare image/video capture.

*/

bool CxeEngineSymbian::initNeeded()

{

    bool result = false;

    if (mCameraDeviceControl->state() == CxeCameraDeviceControl::Ready) {

        if (mode() == Cxe::ImageMode) {

            if(mStillCaptureControl->state() == CxeStillCaptureControl::Uninitialized) {

                // We're in still image mode, camera is reserved and ready, but

                // we need to prepare still image control

                result = true;

            }

        } else if (mode() == Cxe::VideoMode) {

            if (mVideoCaptureControl->state() == CxeVideoCaptureControl::Idle ||

                mVideoCaptureControl->state() == CxeVideoCaptureControl::Initialized) {

                // We're in video mode, camera is reserved and ready, but

                // we need to prepare for video recording.

                result = true;

            }

        }

    }

    return result;

}

/*!

    Check if we need to start viewfinder.

*/

bool CxeEngineSymbian::startViewfinderNeeded()

{

    bool result = false;

    if (mViewfinderControl->state() != CxeViewfinderControl::Running) {

        if (mode() == Cxe::ImageMode &&

            mStillCaptureControl->state() == CxeStillCaptureControl::Ready) {

            // We're in still image mode and ready for capturing... we just need to

            // start viewfinder.

            result = true;

        } else if (mode() == Cxe::VideoMode &&

                   mVideoCaptureControl->state() == CxeVideoCaptureControl::Ready) {

            // We're in video mode and ready for capturing... we just need to

            // start viewfinder.

            result = true;

        }

    }

    return result;

}

void CxeEngineSymbian::initMode(Cxe::CameraMode cameraMode)

{

    CX_DEBUG_ENTER_FUNCTION();

    if (mode() == cameraMode) {

        CX_DEBUG(("initMode() called for current mode"));

        // We're already in the requested mode. However, it is possible

        // that we need to reserve and power on camera and/or prepare

        // the capture control.

        if (reserveNeeded()) {

            // Camera needs to be reserved. Initialization will continue

            // when we get the deviceReady() signal.

            CX_DEBUG(("initMode() - calling reserve()"));

            reserve();

        } else if (initNeeded()) {

            // Camera is reserved and ready, but we need to prepare still image control or

            // video capture control

            CX_DEBUG(("initMode() - calling doInit()"));

            doInit();

        } else if (startViewfinderNeeded()) {

            // Everything is ready and prepared, but we viewfinder is not yet running

            CX_DEBUG(("initMode() - calling viewfinder start()"));

            mViewfinderControl->start();

        } else {

            CX_DEBUG(("initMode() - no actions needed"));

            // Do nothing.

            // We are either already ready to capture or the we're pending

            // on prepare complete callback.

        }

    } else {

        CX_DEBUG(("initMode() called for mode switch"));

        // Mode switch

        mCameraDeviceControl->setMode(cameraMode);

        // stop the vf

        mViewfinderControl->stop();

        if (reserveNeeded()) {

            CX_DEBUG(("initMode() - calling reserve()"));

            reserve();

        } else if (mCameraDeviceControl->state() == CxeCameraDeviceControl::Ready) {

            CX_DEBUG(("initMode() - calling doInit()"));

            // Camera device is ready... we only need to prepare video or still

            // capture control, depending on current mode.

            doInit();

        } else {

            CX_DEBUG(("initMode() - no actions needed"));

            // Do nothing.

            // Camera device control is in Initializing state. Initialization will continue

            // when we get the deviceReady() callback.

        }