cwaveloader.cpp

手机游戏：Symbian S60俄罗斯方块（Tetris）的源代码

#include "CWaveLoader.h"

#include <e32svr.h>
#include <f32file.h>
#include <aknutils.h>


// Construct and Destruct

/// NewL()
CWavLoader* CWavLoader::NewL()
{
	CWavLoader* self = NewLC();
	CleanupStack::Pop(self);

	return self;
}

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

	return self;
}

/// ~
CWavLoader::~CWavLoader()
{}

/// CWavLoader()
CWavLoader::CWavLoader()
{}

/// ConstructL()
void CWavLoader::ConstructL()
{}

/// LoadL()
TSample CWavLoader::LoadL(const TFileName& aFileName)
{
	TFileName name(aFileName);
	CompleteWithAppPath(name);

	RFs fs;
	RFile file;

	fs.Connect();

	CleanupClosePushL(fs);
	CleanupClosePushL(file);

	User::LeaveIfError(file.Open(fs, name, EFileStream | EFileRead));
	
	// get the file size
	TInt size;
	User::LeaveIfError(file.Size(size));
	
	TUint8* tbuf = new (ELeave) TUint8[size];

	TPtr8 ptr( (TUint8*)tbuf, size );
	User::LeaveIfError(file.Read(ptr));
	
	CleanupStack::PopAndDestroy( 2 ); // fs, file

	// convert to 16-bit
	TInt16* buf = new( ELeave )TInt16[size];
	TInt i;
	for(i = 0; i < size; i++)
	{
		TInt v = tbuf[i];
		v -= 128;
		buf[i] = ( TInt16 )( v << 8 );
	}
	delete tbuf;
	
	TSample sample;
	sample.iData = buf;
	sample.iLength = size;
	sample.iRepStart = 0;
	sample.iRepEnd = 0;
	
	return sample;
}