vrexengine.cpp

symbian s60 有关音频的代码实例,供参考

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

// INCLUDE FILES
#include <PathInfo.h>       // for PathInfo

#include "VRexEngine.h"
#include "VRexListView.h"
#include "VRexRecorderAdapter.h"

// Number, name and file size
_LIT(KStringSize,"%d\t%S\t%d bytes");
// Number, name and date modified
_LIT(KStringDate,"%d\t%S\t%S");
// Date string format
_LIT(KDateString,"%D%M%Y%/0%1%/1%2%/2%3%/3 %-B%:0%J%:1%T%:2%S%:3%+B");

const TInt KDateStringLength = 30;

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

    CVRexEngine* CVRexEngine::NewL()

    Description: Two-phased constructor.
    Comments   :

    Return values: CVRexEngine

-----------------------------------------------------------------------------
*/
CVRexEngine* CVRexEngine::NewL()
    {
    CVRexEngine* self =
        CVRexEngine::NewLC();
    CleanupStack::Pop(self);
    return self;
    }

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

    CVRexEngine* CVRexEngine::NewLC()

    Description: Two-phased constructor.
    Comments   : Leaves object in top of cleanup stack

    Return values: CVRexEngine

-----------------------------------------------------------------------------
*/
CVRexEngine* CVRexEngine::NewLC()
    {
    CVRexEngine* self =
        new (ELeave) CVRexEngine();
    CleanupStack::PushL(self);
    self->ConstructL();
    return self;
    }

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

    void CVRexEngine::ConstructL(CVRexView* aView)

    Description: Second phase constructor.
    Comments   :

    Return values: N/A

-----------------------------------------------------------------------------
*/
void CVRexEngine::ConstructL()
    {
    iVPlayer = CVideoPlayerAdapter::NewL();

    //Creating iVRecorder fails in 6600.
    //The leave is ignored here. When the recorder
    //is tried to use and it's NULL a KErrNotSupported
    //is thrown.
    TRAPD(err,
    iVRecorder = CVideoRecorderAdapter::NewL(this)


    );
    }

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

    CVRexEngine::CVRexEngine()

    Description: Constructor.
    Comments   :

    Return values: N/A

-----------------------------------------------------------------------------
*/
CVRexEngine::CVRexEngine()
    {
    }

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

    CVRexEngine::~CVRexEngine()

    Description: Destructor.
    Comments   :

    Return values: N/A

-----------------------------------------------------------------------------
*/
CVRexEngine::~CVRexEngine()
{
    delete iVPlayer;
    iVPlayer = NULL;

    delete iVRecorder;
    iVRecorder = NULL;

    delete iDirList;
    iDirList = NULL;

    iFsSession.Close();
}

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

    TInt CVRexEngine::StartFileList()

    Description: This method reads the appropriate directory list.
    Comments   :

    Return values: Error code

-----------------------------------------------------------------------------
*/
TInt CVRexEngine::StartFileList()
    {
    if (iDirList)
        {
        delete iDirList;
        iDirList = 0;
        }

    TInt error = KErrNone;

    // Root path in phone memory
    TFileName rootPath = PathInfo::PhoneMemoryRootPath();

    // Connect to file server
    error = iFsSession.Connect();
    if (error == KErrNone)
        {
        switch (iDirectory)
            {
            // Get dir. KEntryAttNormal means that no hidden files or
            // directories are included
            case EFileListVideos:
                rootPath.Append(PathInfo::VideosPath());
                error = iFsSession.GetDir(rootPath,KEntryAttNormal,
                    ESortByName,iDirList);
                break;
            // Sounds and Pictures paths are not used in this example
            case EFileListSounds:
            case EFileListPictures:
                error = KErrNotSupported;
                break;
            default:
                rootPath.Append(PathInfo::VideosPath());
                error = iFsSession.GetDir(rootPath,KEntryAttNormal,
                    ESortByName,iDirList);
                break;
            }
        }
    return error;
    }

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

    void CVRexEngine::GetFileListItemsL(CDesCArray* aItems)

    Description: This method constructs the listbox items with directory
                 information.
    Comments   :

    Return values: N/A

-----------------------------------------------------------------------------
*/
void CVRexEngine::GetFileListItemsL(CDesCArray* aItems)
    {
    if(!iDirList)
        return;

    for (TInt i=0;i<iDirList->Count();i++)
        {
        TFileName filename;
        if(iSizeDate==EFileListSize)
            {
            // Show file size
            filename.Format(KStringSize,i+1,&(*iDirList)[i].iName,
                (*iDirList)[i].iSize);
            }
        else
            {
            // Fix the date and time string of last modification
            TBuf<KDateStringLength> dateString;

            (*iDirList)[i].iModified.FormatL(dateString,KDateString);

            // Show date modified
            filename.Format(KStringDate,i+1,&(*iDirList)[i].iName,&dateString);
            }
        aItems->AppendL(filename);
        }
    }

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

    void CVRexEngine::SetDirectory(TInt aDirectory)

    Description: This method sets which directory to list.
    Comments   :

    Return values: N/A

-----------------------------------------------------------------------------
*/
void CVRexEngine::SetDirectory(TInt aDirectory)
    {
    if (aDirectory!=EFileListDirNoChange)
        iDirectory=aDirectory;
    }

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

    void CVRexEngine::SetSizeDate(TInt aSizeDate)

    Description: This method sets whether modification date or file size
                 is shown. There is also an option for toggling the status.
    Comments   :

    Return values: N/A

-----------------------------------------------------------------------------
*/
void CVRexEngine::SetSizeDate(TInt aSizeDate)
    {
    if (aSizeDate==EFileListToggle)
        {
        if (iSizeDate==EFileListSize)
            iSizeDate=EFileListDate;
        else
            iSizeDate=EFileListSize;
        }
    else
        {
        if (aSizeDate!=EFileListSizeDateNoChange)
            iSizeDate=aSizeDate;
        }
    }

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

    void CVRexEngine::EndFileList()

    Description: This method ends the file server session.
    Comments   :

    Return values: N/A

-----------------------------------------------------------------------------
*/
void CVRexEngine::EndFileList()
    {
    // Close the file server session
    iFsSession.Close();
    }

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

    void CVRexEngine::GetVideoFilePathAndNameAtPosition(TInt aPosition,
                          TDes &aName)

    Description: This method gets the video file name at the listbox position.
    Comments   :

    Return values: N/A

-----------------------------------------------------------------------------
*/
void CVRexEngine::GetVideoFilePathAndNameAtPosition(TInt aPosition, TDes &aName)
    {
    if(!iDirList || aPosition < 0 || aPosition >= iDirList->Count())
        return;

    aName.Append(PathInfo::PhoneMemoryRootPath());
    // Use appropriate directory path for launching file

    // Only Videos path is supported by this example
    if (iDirectory == EFileListVideos)
        {
        //Add Videos path
        aName.Append(PathInfo::VideosPath());
        // Add filename to be launched
        aName.Append((*iDirList)[aPosition].iName);
        }

    iCurrentFileName = aName;
    }

// End of File