vrexvideoview.cpp

symbian s60 有关音频的代码实例,供参考

/*
* ============================================================================
*  Name     : CVRexVideoView from VRexVideoView.cpp
*  Part of  : Video Example
*  Created  : 30/08/2006 by Forum  Nokia
*  Implementation notes:
*  Version  : 2.0
*  Copyright: Nokia Corporation, 2006
* ============================================================================
*/

// INCLUDE FILES
#include  <aknviewappui.h>
#include  <avkon.hrh>
#include  <VRex.rsg>
#include <eikmenub.h>           // CEikMenuBar
#include <eikmenup.h>           // CEikMenuPane
#include <coecntrl.h>
#include <coemain.h>

#include "VRexVideoView.h"
#include "VRexVideoContainer.h"
#include "VRexDocument.h"
#include "VRexEngine.h"
#include <avkon.rsg>
#include <avkon.hrh>

_LIT( KVRexLoading, "Loading ..." );
// ================= MEMBER FUNCTIONS =======================

CVRexVideoView::CVRexVideoView()
: iEngine(static_cast<CVRexDocument*>(AppUi()->Document())->Engine())
    {
    }

// ---------------------------------------------------------
// CVRexVideoView::ConstructL(const TRect& aRect)
// EPOC two-phased constructor
// ---------------------------------------------------------
//
void CVRexVideoView::ConstructL()
    {
    BaseConstructL( R_VIEW2 );
    }

// ---------------------------------------------------------
// CVRexVideoView::~CVRexVideoView()
// destructor
// ---------------------------------------------------------
//
CVRexVideoView::~CVRexVideoView()
    {
    if ( iContainer )
        {
        AppUi()->RemoveFromViewStack( *this, iContainer );
        }

    delete iContainer;
    }

// ---------------------------------------------------------
// TUid CVRexVideoView::Id()
//
// ---------------------------------------------------------
//
TUid CVRexVideoView::Id() const
    {
    return KView2Id;
    }

// ---------------------------------------------------------
// CVRexVideoView::HandleCommandL(TInt aCommand)
// takes care of view command handling
// ---------------------------------------------------------
//
void CVRexVideoView::HandleCommandL(TInt aCommand)
    {
    switch ( aCommand )
        {
        case EVRexCmdAppReturn:
            {
            DoReturnL();
            break;
            }
        case EVRexCmdAppRecord:
            {
            DoRecordL();
            break;
            }
        case EVRexCmdAppStop:
            {
            DoStopL();
            break;
            }
        case EVRexCmdAppPause:
            {
            DoPauseL();
            break;
            }
        case EVRexCmdAppContinue:
            {
            DoResumeL();
            break;
            }

        default:
            {
            AppUi()->HandleCommandL( aCommand );
            break;
            }
        }
    }

// ---------------------------------------------------------
// CVRexVideoView::HandleClientRectChange()
// ---------------------------------------------------------
//
void CVRexVideoView::HandleClientRectChange()
    {
    if ( iContainer )
        {
        iContainer->SetRect( ClientRect() );
        }
    }

// ---------------------------------------------------------
// CVRexVideoView::DoActivateL(...)
//
// ---------------------------------------------------------
//
void CVRexVideoView::DoActivateL(
   const TVwsViewId& aPrevViewId,TUid /*aCustomMessageId*/,
   const TDesC8& /*aCustomMessage*/)
    {
    // save info about previous view
    iPrevious = aPrevViewId;

    if (!iContainer)
        {
        iContainer = new (ELeave) CVRexVideoContainer;
        iContainer->SetMopParent(this);
        iContainer->ConstructL( ClientRect(), this, iEngine );
        AppUi()->AddToStackL( *this, iContainer );

        if(iEngine->EngineState() == CVRexEngine::EPreview)
            {
            iContainer->Finder()->StartL();
            SwitchCbaL(R_VREX_RECORD_RETURN);
            }
        else if (iEngine->EngineState() == CVRexEngine::EPlay)
            {
            TFileName fileName = iEngine->CurrentFileName();

            iEngine->iVPlayer->SetNewFileL(fileName);

            // Set time navi pane to indicate loading
            iContainer->SetNaviLabelL( KVRexLoading );

            // Init the controller
            DoInitControllerL();
            SwitchCbaL(R_VREX_PAUSE_STOP);
            }
        else
            User::Leave(KErrGeneral);
        }
   }
// ---------------------------------------------------------
// CVRexVideoView::DoDeactivate()
//
// ---------------------------------------------------------
//
void CVRexVideoView::DoDeactivate()
    {
    if ( iContainer )
        {
        AppUi()->RemoveFromViewStack( *this, iContainer );
        }

    delete iContainer;
    iContainer = NULL;
    }

/*
-----------------------------------------------------------------------------

    void CVRexVideoView::DoRecordL()

    Description: This method starts recording a video clip.
    Comments   :

    Return values: N/A

-----------------------------------------------------------------------------
*/
void CVRexVideoView::DoRecordL()
    {
    iEngine->SetEngineState(CVRexEngine::ERecord);
    if( iEngine->iVRecorder )
        {
        iEngine->iVRecorder->StartL(iContainer,
            iContainer->Finder()->CameraHandle());
        SwitchCbaL(R_VREX_STOP);
        }
    else
        {
        User::Leave(KErrNotSupported);
        }
    }

/*
-----------------------------------------------------------------------------

    void CVRexVideoView::DoResumeL()

    Description: This method resumes playback of a video clip.
    Comments   :

    Return values: N/A

-----------------------------------------------------------------------------
*/
void CVRexVideoView::DoResumeL()
    {
    if(iEngine->iVPlayer->State() != CVideoPlayerAdapter::EPaused)
        return;

    iEngine->iVPlayer->PlayL();
    SwitchCbaL(R_VREX_PAUSE_STOP);
    }

/*
-----------------------------------------------------------------------------

    void CVRexVideoView::DoStopL()

    Description: This method stops playback or recording of a video clip.
    Comments   :

    Return values: N/A

-----------------------------------------------------------------------------
*/
void CVRexVideoView::DoStopL()
    {
    iContainer->SetNaviLabelL(KNullDesC);

    if((iEngine->iVPlayer->State() == CVideoPlayerAdapter::EPlaying) ||
       (iEngine->iVPlayer->State() == CVideoPlayerAdapter::EPaused))
        iEngine->iVPlayer->Stop();

    //A check is done to see if the recorder object is constructed.
    //For example in 6600 it can't be constructed
    if( iEngine->iVRecorder )
        {
        if(iEngine->iVRecorder->State() == CVideoRecorderAdapter::ERecording)
        iEngine->iVRecorder->StopL();
        }
    }

/*
-----------------------------------------------------------------------------

    void CVRexVideoView::DoPauseL()

    Description: This method pauses playback of video clip.
    Comments   :

    Return values: N/A

-----------------------------------------------------------------------------
*/
void CVRexVideoView::DoPauseL()
    {
    if(iEngine->iVPlayer->State() == CVideoPlayerAdapter::EPlaying)
        {
        iEngine->iVPlayer->PauseL();
        SwitchCbaL(R_VREX_CONTINUE_RETURN);
        }
    }

    /*
-----------------------------------------------------------------------------

    void CVRexVideoView::DoInitControllerL()

    Description: This method initializes video playback controller.
    Comments   :

    Return values: N/A

-----------------------------------------------------------------------------
*/
void CVRexVideoView::DoInitControllerL()
    {
    if(iContainer)
        {
        TRect tmp  = iContainer->VideoRect();
        iEngine->iVPlayer->InitControllerL(iContainer,
            iContainer->ClientWsSession(),
            iContainer->ScreenDevice(),
            iContainer->ClientWindow(), tmp, tmp);
        }
    }

/*
-----------------------------------------------------------------------------

    void CVRexVideoView::DoReturnL()

    Description: This method returns app to previous view.
    Comments   :

    Return values: N/A

-----------------------------------------------------------------------------
*/
void CVRexVideoView::DoReturnL()
    {
    if (iEngine->EngineState()== CVRexEngine::EPreview)
        {
        iContainer->Finder()->Stop();
        ActivateViewL(iPrevious);
        }
    else if(iEngine->EngineState()== CVRexEngine::EPlay &&
            iEngine->iVPlayer->State() == CVideoPlayerAdapter::EPaused)
        {
        iEngine->iVPlayer->Stop();
        }
    else
        {
        ActivateViewL(iPrevious);
        }
    }
/*
-----------------------------------------------------------------------------

    void CVRexVideoView::HandleStatusPaneSizeChange()

    Description: Called by framework when resource is changed.
    Comments   :

    Return values: N/A

-----------------------------------------------------------------------------
*/
void CVRexVideoView::HandleStatusPaneSizeChange()
    {
    CAknView::HandleStatusPaneSizeChange(); //call to upper class
    if (iContainer)
        iContainer->SetRect(ClientRect());
    }

/*
-----------------------------------------------------------------------------

    CVRexVideoView::SwitchCbaL(TInt aResourceId)

    Description: This method changes the CBA, 0 resets to default CBA.
    Comments   :

    Return values: N/A

-----------------------------------------------------------------------------
*/

void CVRexVideoView::SwitchCbaL(TInt aResourceId)
    {
    if (aResourceId == 0)
        aResourceId = R_AVKON_SOFTKEYS_OPTIONS_EXIT;
    CEikButtonGroupContainer* cba = Cba();
    cba->SetCommandSetL(aResourceId);
    cba->DrawNow();
    }

// End of file