/*

* Copyright (c) 2007-2008 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:  Provides the flashing icon/LED & timing capability of the*

*/

// INCLUDE FILES

#include <e32base.h>

#include <e32std.h>

#include <eikbtgpc.h>

#include <cameraapp.rsg>

#include <vgacamsettings.rsg>

#include "CamSelfTimer.h"

#include "CamPanic.h"

#include "CamAppUi.h"

#include "CamUtility.h"

#include "Cam.hrh"  // For ECamSelfTimerSoundId def

#include "OstTraceDefinitions.h"

#ifdef OST_TRACE_COMPILER_IN_USE

#include "CamSelfTimerTraces.h"

#endif

// CONSTANTS

// MACROS

// LOCAL CONSTANTS AND MACROS

// MODULE DATA STRUCTURES

// LOCAL FUNCTION PROTOTYPES

// FORWARD DECLARATIONS

// ============================= LOCAL FUNCTIONS ===============================

// ============================ MEMBER FUNCTIONS ===============================

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

// CCamSelfTimer::NewL

// Two-phased constructor.

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

//

CCamSelfTimer* CCamSelfTimer::NewL( CCamAppController& aController )

    {

    CCamSelfTimer* self = new( ELeave ) CCamSelfTimer( aController );

    CleanupStack::PushL( self );

    self->ConstructL();

    CleanupStack::Pop( self );

    return self;

    }

// Destructor

CCamSelfTimer::~CCamSelfTimer()

  {

  PRINT( _L("Camera => ~CCamSelfTimer") );

  // If self-timer is active, stop it

  if ( IsActive() )

      {

      Cancel();

      }

  // close up observers array

  iObservers.Close();

  delete iPeriodicTimer;    

  PRINT( _L("Camera <= ~CCamSelfTimer") );

  }

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

// CCamSelfTimer::StartSelfTimer

// Will be called to start self timer.  If self timer is already running, the 

// timer is cancelled and the capture operation is run immediately.

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

//

void CCamSelfTimer::StartSelfTimer()

  {

  // Check it is not already running

  if ( ECamSelfTimerStandby == iState )

    {

    ChangeState( ECamSelfTimerActive1 );

    }

  // If the timer is already running, then we must cancel the timer

  // and do the capture operation now!

  else  

    { 

    // Cancel the timer

    Cancel();

    if( ECamControllerImage == iMode )

      {

      switch ( iImageMode )

        {

        case ECamImageCaptureBurst:

        case ECamImageCaptureTimeLapse:

          {

          // Start the autofocus operation now, the capture will be queued

          // after focus completes

          OstTrace0( CAMERAAPP_PERFORMANCE, DUP7_CCAMSELFTIMER_STARTSELFTIMER, "e_CAM_APP_AF 1" );

          iController.StartAutoFocus();

          // Softkeys are blank/cancel if doing burst capture

          // but cancel means cancel ongoing burst, not cancel self-timer

          // replace the buttons with the correct command set

          CCamAppUi* appUi = static_cast<CCamAppUi*>( CEikonEnv::Static()->AppUi() );

          if ( appUi )

            {

            // blank the softkeys in preparation for capture

            TRAP_IGNORE( appUi->SetSoftKeysL( R_CAM_SOFTKEYS_BLANK_STOP ) );

            }

          }

          //lint -fallthrough

        case ECamImageCaptureSingle: 

          {

          // If still Self-Timer is interrupted, take the photo NOW.

          // If we were in multi-shot, this capture is queued

          OstTrace0( CAMERAAPP_PERFORMANCE, CCAMSELFTIMER_STARTSELFTIMER, "e_CAM_APP_SHOT_TO_SNAPSHOT 1" );

          OstTrace0( CAMERAAPP_PERFORMANCE, DUP1_CCAMSELFTIMER_STARTSELFTIMER, "e_CAM_PRI_SHOT_TO_SNAPSHOT 1" );

          OstTrace0( CAMERAAPP_PERFORMANCE, DUP2_CCAMSELFTIMER_STARTSELFTIMER, "e_CAM_PRI_SHOT_TO_SAVE 1" );

          OstTrace0( CAMERAAPP_PERFORMANCE, DUP3_CCAMSELFTIMER_STARTSELFTIMER, "e_CAM_PRI_SHOT_TO_SHOT 1" );

          OstTrace0( CAMERAAPP_PERFORMANCE, DUP4_CCAMSELFTIMER_STARTSELFTIMER, "e_CAM_APP_SHOT_TO_STILL 1" );

          OstTrace0( CAMERAAPP_PERFORMANCE, DUP5_CCAMSELFTIMER_STARTSELFTIMER, "e_CAM_APP_CAPTURE_START 1" );

          OstTrace0( CAMERAAPP_PERFORMANCE, DUP6_CCAMSELFTIMER_STARTSELFTIMER, "e_CAM_PRI_SERIAL_SHOOTING 1" );

          iController.Capture();

          break;

          }

        default:

          break;

        }

      }

    else

      {

      // Start recording now

      TRAP_IGNORE( iController.StartVideoRecordingL() );

      }

    }

  }

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

// CCamSelfTimer::SetModeL

// Called when the current capture method (Video or Still) changes.

// Updates the internal state (so correct capture method is called when self

// timer expires) and if timer is already running, cancels the outstanding

// timer (as the view has changed).

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

//

void CCamSelfTimer::SetModeL( TCamCameraMode         aMode, 

                             TCamImageCaptureMode   aImageMode,

                             TCamSelfTimerFunctions aFunc )

  {

  iMode      = aMode;

  iImageMode = aImageMode;

  // Based on the supplied selftimer function (specifying periods) load the 

  // individual data from PSI.

  TPckgBuf <TSelfTimerSetting> pckg;

  TInt ret = KErrNone;

  switch ( aFunc )

    {

    case ECamSelfTimerMode1:

      ret = CamUtility::GetPsiAnyL( ECamPsiSelfTimerPeriod1, &pckg );

      break;

    case ECamSelfTimerMode2:

      ret = CamUtility::GetPsiAnyL( ECamPsiSelfTimerPeriod2, &pckg );

      break;

    case ECamSelfTimerMode3:

      ret = CamUtility::GetPsiAnyL( ECamPsiSelfTimerPeriod3, &pckg );

      break;            

    case ECamSelfTimerDisabled:

      //Fall-through

    default:

      break;

    }

  // Check it is supported.  

  __ASSERT_ALWAYS( ret == KErrNone, CamPanic( ECamPanicUnhandledCommand ) );

  iSettings = pckg();

  // Set time remaining and update observers.

  iTimeRemaining = iSettings.iThreshold[ECamSelfTimerMode1];    

  NotifyObservers( ECamSelfTimerEventTimerOn );

  }

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

// CCamSelfTimer::Cancel

// Cancels the timer if already running, and returns the self timer to 

// self-timer standby state.

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

//

void CCamSelfTimer::Cancel()

    {

    ChangeState( ECamSelfTimerStandby );

    }

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

// CCamSelfTimer::IsActive

// Returns whether or not the SelfTimer is currently active (counting down)

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

//

TBool CCamSelfTimer::IsActive()

    {

    if ( iState == ECamSelfTimerStandby )

        {

        return EFalse;

        }

    else

        {

        return ETrue;        

        }           

    }

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

// CCamSelfTimer::CCamSelfTimer

// C++ default constructor can NOT contain any code, that

// might leave.

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

//

CCamSelfTimer::CCamSelfTimer( CCamAppController& aController ) :                                 

                                 iState( ECamSelfTimerStandby ),

                                 iController( aController )

    {                                     

    iCallback = TCallBack( TimerCallback, this );

    }

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

// CCamSelfTimer::ConstructL

// Symbian 2nd phase constructor can leave.

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

//

void CCamSelfTimer::ConstructL()

    {

    iPeriodicTimer = CPeriodic::NewL( CActive::EPriorityHigh );    

    }

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

// CCamSelfTimer::ChangeState

// Called to move between the internal self-timer states.

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

//

void CCamSelfTimer::ChangeState( TCamSelfTimer aState )

    {  

    // if the timer object has not been created

    __ASSERT_DEBUG( iPeriodicTimer != NULL, CamPanic( ECamPanicNullPointer ) );

    // If the state has been changed

    iState = aState;

    switch ( iState )

        {

        case ECamSelfTimerActive1:

            iController.StopIdleTimer(); // no standby mode if time is running

            iIndication = ETrue;

            //lint -fallthrough

        case ECamSelfTimerActive2:

        case ECamSelfTimerActive3:

            iTimeRemaining = iSettings.iThreshold[iState];    

            // Use smallest time period as tick period. This assumes that

            // smallest time period is divisble into larger time period.

            iTimerTickPeriod = iSettings.iFlashPeriod[iState];    // Need half-periods

            if ( iTimerTickPeriod.Int() > iSettings.iBeepPeriod[iState] )

                {

                iTimerTickPeriod = iSettings.iBeepPeriod[iState];

                }

            if ( iTimerTickPeriod.Int() == KMaxTInt ) // If state is timer based (always on)

              {

              iIndication = ETrue;

              iPeriodicTimer->Cancel();

              iTimerTickPeriod = iTimeRemaining;// Force period to be time left

              // Reschedule the timer to go off when the remaining time has completed

              iPeriodicTimer->Start( iTimeRemaining, iTimeRemaining, iCallback );

              }

            else if ( iTimerTickPeriod.Int() == 0 ) // Always off

              {

              iIndication = EFalse;

              iPeriodicTimer->Cancel();

              iTimerTickPeriod = iTimeRemaining;// Force period to be time left

              // Reschedule the timer to go off when the remaining time has completed

              iPeriodicTimer->Start( iTimeRemaining, iTimeRemaining, iCallback );

              }

            else if ( iTimerTickPeriod.Int() != KErrNotSupported )    // This is a valid period

              {

              TInt period = iTimerTickPeriod.Int();

              iPeriodicTimer->Cancel();

              iPeriodicTimer->Start( period, period, iCallback );

              }

            // otherwise, do nothing

            else

              {

              // empty statement to remove Lint error.

              }

            // Check if we need to start autofocus

            if ( iSettings.iAutoFocus != KErrNotSupported && 

                 iTimeRemaining.Int() == iSettings.iAutoFocus )

              {

              if ( ECamControllerVideo != iMode )

                {

                // Start the AutoFocus operation

                OstTrace0( CAMERAAPP_PERFORMANCE, CCAMSELFTIMER_CHANGESTATE, "e_CAM_APP_AF 1" );

                iController.StartAutoFocus();

                }

              }

            DoIndication( iIndication );

            break;

        case ECamSelfTimerStandby:           

            iPeriodicTimer->Cancel();

            if ( !iController.IsSlideInSelfTimerPreview() )

              {

              iController.SetDynamicSettingToDefault(ECamSettingItemDynamicSelfTimer);

              }

            NotifyObservers( ECamSelfTimerEventTimerOff );

            break;

        default:

            break;

        }    

    }

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

// TimerCallback Callback used for self timer class to be informed of periodic

// timer events

// Returns: TInt: KErrNone if successful.

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

//

TInt CCamSelfTimer::TimerCallback( TAny* aPtr )

    {

    CCamSelfTimer* timer = static_cast< CCamSelfTimer* >( aPtr );

    __ASSERT_DEBUG( timer != NULL, CamPanic( ECamPanicNullPointer ) ); 

    timer->Tick();        

    return KErrNone;

    }

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

// CCamSelfTimer::Tick

// Called when the periodic timer "ticks", used to 

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

//

void CCamSelfTimer::Tick()

  {

  PRINT(_L("Camera => CCamSelfTimer::Tick()"));    

  // Adjust the time remaining

  iTimeRemaining = iTimeRemaining.Int() - iTimerTickPeriod.Int();

  // Adjust the time elapsed since last beep and indicator state change.

  iTimeElapsedSinceIndication += iTimerTickPeriod.Int();

  // Adjust the indicator state if necessary.

  __ASSERT_DEBUG( iState < ECamSelfTimerStandby, CamPanic( ECamPanicUnhandledCreateSettingItem ) );

  if ( iTimeElapsedSinceIndication >= iSettings.iFlashPeriod[iState] )

    {

    iIndication = !iIndication;

    iTimeElapsedSinceIndication = 0;

    }

  // If we have reached the end of the timer period...

  if ( iTimeRemaining == TTimeIntervalMicroSeconds32( 0 ) )

    {

    // Cancel the timer, reset internal state.

    Cancel();

    // The Controller takes care of the synchronisation of this.

    // If AutoFocus is complete, start Capture now

    // If AutoFocus still ongoing, it will wait until autofocus is 

    // complete THEN Capture.

    if ( ECamControllerImage == iMode )

      {  

      CCamAppUi* appUi = static_cast<CCamAppUi*>( CEikonEnv::Static()->AppUi() );

      if( appUi )

        {

        // Blank all softkeys if doing still capture

        if ( iImageMode == ECamImageCaptureSingle )

          {

          // blank the softkeys in preparation for capture

          TRAP_IGNORE( appUi->SetSoftKeysL( R_CAM_SOFTKEYS_BLANK ) );

          }

        // Softkeys are blank/cancel if doing burst capture

        // but cancel means cancel ongoing burst, not cancel self-timer        

        else if ( ECamImageCaptureBurst     == iImageMode 

               || ECamImageCaptureTimeLapse == iImageMode )

          {

          // blank the softkeys in preparation for capture

          TRAP_IGNORE( appUi->SetSoftKeysL( R_CAM_SOFTKEYS_BLANK_STOP ) )

          }

        }

      // Ensure everything is OFF

      DoIndication( EFalse );

      // Do capture

      OstTrace0( CAMERAAPP_PERFORMANCE, CCAMSELFTIMER_TICK, "e_CAM_APP_SHOT_TO_SNAPSHOT 1" );

      OstTrace0( CAMERAAPP_PERFORMANCE, DUP1_CCAMSELFTIMER_TICK, "e_CAM_PRI_SHOT_TO_SNAPSHOT 1" );

      OstTrace0( CAMERAAPP_PERFORMANCE, DUP2_CCAMSELFTIMER_TICK, "e_CAM_PRI_SHOT_TO_SAVE 1" );

      OstTrace0( CAMERAAPP_PERFORMANCE, DUP3_CCAMSELFTIMER_TICK, "e_CAM_PRI_SHOT_TO_SHOT 1" );

      OstTrace0( CAMERAAPP_PERFORMANCE, DUP4_CCAMSELFTIMER_TICK, "e_CAM_APP_SHOT_TO_STILL 1" );

      OstTrace0( CAMERAAPP_PERFORMANCE, DUP5_CCAMSELFTIMER_TICK, "e_CAM_APP_CAPTURE_START 1" );

      OstTrace0( CAMERAAPP_PERFORMANCE, DUP6_CCAMSELFTIMER_TICK, "e_CAM_PRI_SERIAL_SHOOTING 1" );

      iController.Capture();

      }

    else // video mode

      {   

      TRAP_IGNORE( iController.StartVideoRecordingL() )

      }            

    }

  // The timer is ongoing

  else 

    {

    TInt remaining = iTimeRemaining.Int();

    // Work out if we need to change period.

    if ( remaining        == iSettings.iThreshold[ECamSelfTimerActive2] 

      && KErrNotSupported != iSettings.iThreshold[ECamSelfTimerActive2] )

      {

      ChangeState( ECamSelfTimerActive2 );

      }

    else if ( remaining        == iSettings.iThreshold[ECamSelfTimerActive3] 

           && KErrNotSupported != iSettings.iThreshold[ECamSelfTimerActive3])

      {

      ChangeState( ECamSelfTimerActive3 );

      }

    else

      {

      // Update the indicators (done as part of change state as well)

      DoIndication( iIndication );

      }

    // Check if we need to start autofocus

    if ( KErrNotFound != iSettings.iAutoFocus 

      && remaining    == iSettings.iAutoFocus )

      {

      if ( ECamControllerImage == iMode )

        {

        // Start the AutoFocus operation

        OstTrace0( CAMERAAPP_PERFORMANCE, DUP7_CCAMSELFTIMER_TICK, "e_CAM_APP_AF 1" );

        iController.StartAutoFocus();

        }

      }

    }

  PRINT(_L("Camera <= CCamSelfTimer::Tick()"));    

  }

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

// CCamSelfTimer::DoIndication

// Send event to self timer observers

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

//                    

void CCamSelfTimer::DoIndication( TBool aOn )

    {

    iIndication = aOn;

    if ( aOn )        

        {        

        NotifyObservers( ECamSelfTimerEventTimerOn );

        }

    else

        {

        NotifyObservers( ECamSelfTimerEventTimerOff );

        }

    }

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

// CCamSelfTimer::AddObserverL

// Add a self timer observer 

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

//

void CCamSelfTimer::AddObserverL( const MCamSelfTimerObserver* aObserver )

    {

    User::LeaveIfError( iObservers.Append( aObserver ) );

    }

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

// CCamSelfTimer::RemoveObserver

// Remove a self timer observer

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

//

void CCamSelfTimer::RemoveObserver( const MCamSelfTimerObserver* aObserver )

    {

    TInt i;

    TInt numobservers = iObservers.Count();

    for ( i = 0; i < numobservers; i++ )

        {

        // if the observer is the one to remove

        if ( iObservers[i] == aObserver )

            {

            iObservers.Remove( i );

            return;

            }

        }

    }

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

// CCamSelfTimer::NotifyObservers

// Send self timer event to observers

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

//

void CCamSelfTimer::NotifyObservers( TCamSelfTimerEvent aEvent )

    {

    const TInt KMicroSecsPerSec = 1000000;

    TInt timeRem = iTimeRemaining.Int() / KMicroSecsPerSec;

    TInt i;

    TInt numobservers = iObservers.Count();

    for ( i = 0; i < numobservers; i++ )

        {