/*

* Copyright (c) 2002-2006 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:  Implementation of RingToneRecognizer

*

*/

// INCLUDE FILES

#include <apmrec.h>

#include <apmstd.h>

#include <implementationproxy.h>

#include "recrt.h"

// CONSTANTS

const TUid KUidRingingToneRecognizer={0x100059EA};

const TInt KMinBufferLength=3;					// minimum amount of file needed to determine a ringing tone IF it's not called .rng

const TInt KMaxBufferLength=4;					// maximum amount of buffer space we will ever use

const TInt KRecRtCommandByte=2;					// 00000010 = <command length>

const TInt KRecRtUnicodeCommandByte=3;			// 00000011 = <command length> if unicode

const TInt KRecRtProgrammingByte=74;			// 01001010 = <ringing-tone programming> + 0

const TInt KRecRtSoundByte=58;					// 00111010 = <sound> + 0

const TInt KRecRtUnicodeByte=68;				// 01000100 = <unicode> + 0

const TInt KRecRtFileExtensionsMightBeValid=4;	// If the file name length > 4, the file extension might be valid

_LIT(KRingToneExtension1, ".rng");

_LIT(KRingToneExtension2, ".nrt");

_LIT(KRingToneExtension3, ".ota");

_LIT8(KDataTypeRingingTone,"application/vnd.nokia.ringing-tone");

CApaRingingToneRecognizer::CApaRingingToneRecognizer()

    : CApaDataRecognizerType(KUidRingingToneRecognizer, CApaDataRecognizerType::ENormal)

    {

    iCountDataTypes=1;

    }

CApaRingingToneRecognizer::~CApaRingingToneRecognizer()

    {

    // Do nothing

    }

TUint CApaRingingToneRecognizer::PreferredBufSize()

    {

    return KMaxBufferLength;

    }

TDataType CApaRingingToneRecognizer::SupportedDataTypeL(TInt /*aIndex*/) const

	{

//	__ASSERT_DEBUG(aIndex==0,User::Invariant());

	return TDataType(KDataTypeRingingTone);

	}

void CApaRingingToneRecognizer::DoRecognizeL(const TDesC& aName, const TDesC8& aBuffer)

{

	TBool nameRecognized=EFalse;

	if (aName.Length()>KRecRtFileExtensionsMightBeValid)

	{

		if ((aName.Right(KRecRtFileExtensionsMightBeValid).CompareF(KRingToneExtension1)==0) ||

			(aName.Right(KRecRtFileExtensionsMightBeValid).CompareF(KRingToneExtension2)==0) ||

			(aName.Right(KRecRtFileExtensionsMightBeValid).CompareF(KRingToneExtension3)==0))

			nameRecognized=ETrue;

	}

	TInt length=aBuffer.Length();

	if (length<KMinBufferLength)

		return;		// too short to be a ring tone

	TBool validChars=EFalse;

	if(aBuffer[0] == KRecRtCommandByte )	//if it's a ring tone, it's not in unicode format

	{

		if (aBuffer[1] == KRecRtProgrammingByte && aBuffer[2] == KRecRtSoundByte)

			validChars = ETrue;

	}

	else if (aBuffer[0] == KRecRtUnicodeCommandByte)	// if it's a ring tone, it is in unicode format	

	{	

		if (aBuffer[1] == KRecRtProgrammingByte && aBuffer[2] == KRecRtUnicodeByte && aBuffer[3] == KRecRtSoundByte)

			validChars = ETrue;

	}

	else if(aBuffer[0] == 0x00 && aBuffer[1] == 0x11 && aBuffer[2] == 0x06)

	{

		validChars = ETrue;

	}

	if (!validChars)

		return;		// not a ringing tone

	else 

	{

		if (!nameRecognized)

			iConfidence=EProbable;	// is probably a ringing tone

		else

			iConfidence=ECertain;	// is certainly a ringing tone

		iDataType=TDataType(KDataTypeRingingTone);

	}

}

CApaDataRecognizerType* CApaRingingToneRecognizer::CreateRecognizerL()

    {

    return new (ELeave) CApaRingingToneRecognizer();

    }

const TImplementationProxy ImplementationTable[] =

    {

    IMPLEMENTATION_PROXY_ENTRY(KRingingToneRecognizerImplementationUid, CApaRingingToneRecognizer::CreateRecognizerL)

    };

EXPORT_C const TImplementationProxy* ImplementationGroupProxy(TInt& aTableCount)

    {

    aTableCount = sizeof(ImplementationTable) / sizeof(TImplementationProxy);

    return ImplementationTable;

    }

// End of file