recorderadapter.cpp

symbian 可以实现控制声音大小的源码 非常实用！

/* Copyright (c) 2004, Nokia. All rights reserved */


// INCLUDE FILES
#include <eikmenup.h>
#include <eikapp.h>
#include <sound.rsg>

#include "sound.pan"
#include "sound.hrh"
#include "recorderadapter.h"
#include "soundappui.h"


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

// -----------------------------------------------------------------------------
// CRecorderAdapter::CRecorderAdapter()
// C++ default constructor can NOT contain any code, that might leave.
// -----------------------------------------------------------------------------
//
CRecorderAdapter::CRecorderAdapter( CSoundAppUi& aAppUi ) : iAppUi( aAppUi ) 
    {
    // No implementation required
    }

// -----------------------------------------------------------------------------
// CRecorderAdapter::NewL()
// Two-phased constructor.
// -----------------------------------------------------------------------------
//
CRecorderAdapter* CRecorderAdapter::NewL( CSoundAppUi& aAppUi )
    {
    CRecorderAdapter* self = NewLC( aAppUi );
    CleanupStack::Pop( self ); 
    return self;
    }

// -----------------------------------------------------------------------------
// CRecorderAdapter::NewLC()
// Two-phased constructor.
// -----------------------------------------------------------------------------
//
CRecorderAdapter* CRecorderAdapter::NewLC( CSoundAppUi& aAppUi )
    {
    CRecorderAdapter* self = new ( ELeave ) CRecorderAdapter( aAppUi );
    CleanupStack::PushL( self );
    self->ConstructL();
    return self;
    }

// -----------------------------------------------------------------------------
// CRecorderAdapter::ConstructL()
// Symbian 2nd phase constructor can leave.
// -----------------------------------------------------------------------------
//
void CRecorderAdapter::ConstructL()
    {
    
     // Load a string from the resource file.
    //  Identifying string for this audio utility.
     itextResourceIdentifier = CCoeEnv::Static()->AllocReadResourceL( 
                                                  R_SOUN_MODE_RECORDER );


    iMdaAudioRecorderUtility = CMdaAudioRecorderUtility::NewL( *this );
    const TDesC& aFileName = KRecorderFile;

    #ifdef __WINS__
        // on emulator, the sound files used by application 
        // are deployed onto c: drive
        _LIT( tFullPath,"c:\\system\\apps\\sound\\" );
        TParse parse;

    #else
        // on real phone, application can be installed to the 
        // memory card ( non-"C:" drive ), this part of code evaluates
        // current application path:
        
        // find the instance of EikonEnv
        CEikonEnv& ee = *CEikonEnv::Static();
        
        // derive the instance of EikonAppUi
        CEikAppUi& ea = *( ee.EikAppUi() ); 

        // fetch the application full filename
        TFileName tAppFullName = ea.Application()->AppFullName();

        TParse parse;
        
        // form parse object containing full app name
        parse.Set( tAppFullName, NULL, NULL );
        
        // get application path with drive letter
        TFileName tFullPath = parse.DriveAndPath();
    #endif

    // use tparse to get the full path to sound file
    parse.Set( tFullPath, &aFileName,  NULL );
    TFileName tFullFileName = parse.FullName();

    // Open an existing sample file for playback or recording,
    // causes MMdaObjectStateChangeObserver::MoscoStateChangeEvent
    // to be called
    iMdaAudioRecorderUtility->OpenFileL( tFullFileName );
    }

// -----------------------------------------------------------------------------
// CRecorderAdapter::~CRecorderAdapter()
// Destructor.
// -----------------------------------------------------------------------------
//
CRecorderAdapter::~CRecorderAdapter()
    {
    delete iMdaAudioRecorderUtility;    

    // Delete private HBuf member for indetify
    delete itextResourceIdentifier;
    }

// -----------------------------------------------------------------------------
// CRecorderAdapter::UpdateMenuL()
// Uppdate the menu
// -----------------------------------------------------------------------------
//
void CRecorderAdapter::UpdateMenuL( CEikMenuPane* aMenuPane )
    {
    aMenuPane->SetItemDimmed( ESoundCmdPlay,   ETrue );
    aMenuPane->SetItemDimmed( ESoundCmdRecord, ETrue );
    aMenuPane->SetItemDimmed( ESoundCmdStop,   ETrue );
    aMenuPane->SetItemDimmed( ESoundCmdChange, ETrue );

    switch ( iMdaAudioRecorderUtility->State() )
        {
        case CMdaAudioRecorderUtility::ENotReady:
            aMenuPane->SetItemDimmed( ESoundCmdChange, EFalse );
            break;

        case CMdaAudioRecorderUtility::EOpen:
            aMenuPane->SetItemDimmed( ESoundCmdPlay, EFalse );
            aMenuPane->SetItemDimmed( ESoundCmdRecord, EFalse );
            aMenuPane->SetItemDimmed( ESoundCmdChange, EFalse );
            break;

        case CMdaAudioRecorderUtility::EPlaying:
            aMenuPane->SetItemDimmed( ESoundCmdStop, EFalse );
            break;

        case CMdaAudioRecorderUtility::ERecording:
            aMenuPane->SetItemDimmed( ESoundCmdStop, EFalse );
            break;

        default:
            User::Panic( KRecorderAdapter, KSoundPanicInvalidMdaState );
            break;
        }
    }

// -----------------------------------------------------------------------------
// CRecorderAdapter::PlayL()
// Play the wav
// -----------------------------------------------------------------------------
//
void CRecorderAdapter::PlayL()
    {
    // Play through the device speaker
    iMdaAudioRecorderUtility->
                        SetAudioDeviceMode( CMdaAudioRecorderUtility::ELocal );

    // Set maximum volume for playback
    iMdaAudioRecorderUtility->SetVolume( iMdaAudioRecorderUtility->MaxVolume() );

    // Set the playback position to the start of the file
    iMdaAudioRecorderUtility->SetPosition( TTimeIntervalMicroSeconds( 0 ) );

    iMdaAudioRecorderUtility->PlayL();
    }

// -----------------------------------------------------------------------------
// CRecorderAdapter::StopL()
// Stop the play
// -----------------------------------------------------------------------------
//
void CRecorderAdapter::StopL()
    {
    iMdaAudioRecorderUtility->Stop();
    }

// -----------------------------------------------------------------------------
// CRecorderAdapter::RecordL()
// Record from phone microphone
// -----------------------------------------------------------------------------
//
void CRecorderAdapter::RecordL()
    {
    // Record from the device microphone
    iMdaAudioRecorderUtility->SetAudioDeviceMode( 
                                            CMdaAudioRecorderUtility::ELocal );

    // Set maximum gain for recording
    iMdaAudioRecorderUtility->SetGain( iMdaAudioRecorderUtility->MaxGain() );
    
    // Delete current audio sample from beginning of file
    iMdaAudioRecorderUtility->SetPosition( TTimeIntervalMicroSeconds( 0 ) );
    iMdaAudioRecorderUtility->CropL();
   
    iMdaAudioRecorderUtility->RecordL();
    }

// -----------------------------------------------------------------------------
// CRecorderAdapter::Identify()
// Identify mode
// -----------------------------------------------------------------------------
//
const TDesC& CRecorderAdapter::Identify()
    {
    return *itextResourceIdentifier;
    }

// -----------------------------------------------------------------------------
// CRecorderAdapter::MoscoStateChangeEvent()
// Mosco State Change Event are here
// -----------------------------------------------------------------------------
//
void CRecorderAdapter::MoscoStateChangeEvent( CBase* /*aObject*/, 
                                              TInt /*aPreviousState*/, 
                                              TInt /*aCurrentState*/, 
                                              TInt /*aErrorCode*/ )
    {
    // Mo implementation required
    }


// End of File