/*

* Copyright (c) 2002-2009 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:  Symbian recognizer for DRM protected files

*

*/

// INCLUDE FILES

#include <apmrec.h>

#include <apmstd.h>

#include <ecom/ecom.h>

#include <ecom/implementationproxy.h>

#include "RecDRM.h"

#define RECOGNIZE_KEY_CHAIN

// CONSTANTS

const TUid KUidDRMRecognizer={ 0x101F51F4 };

// Version must be 1 so that it conforms to OMA DRM 1.0 specification

const TInt KDCFVersionSupported( 1 );

// minimum size of supported mime-type

const TInt KMinContentTypeLen( 3 );

// maximum amount of buffer space we will ever use

const TInt KMaxBufferLength=256;

const TInt KDCFHeaderLength=3;

const TInt KLengthBoxSize = 4;

const TInt KLengthBoxType = 4;

const TInt KLengthBoxSize64 = 8;

const TInt KLengthVersion = 1;

const TInt KLengthFlags = 3;

_LIT8(KFTypPrefix, "ftyp");

_LIT8(KODFPrefix, "odcf");

_LIT8(KRoapTriggerElement, "roap-trigger:roapTrigger"); // before OMA spec CR, ROAP Trigger namespace prefix was roap-trigger

_LIT8(KRoapTriggerElement2, "roap:roapTrigger");

_LIT8(KRoapTriggerType, "application/vnd.oma.drm.roap-trigger+xml");

const TImplementationProxy ImplementationTable[] =

        {

        IMPLEMENTATION_PROXY_ENTRY(0x101F6DB8, CApaDRMRecognizer::CreateRecognizerL)

        };

#ifdef DRM_OMA2_ENABLED

TUint32 ReadUint32FromBlock(const TDesC8& aBlock, TInt aOffset)

    {

    return (aBlock[aOffset] << 24) +

        (aBlock[aOffset + 1] << 16) +

        (aBlock[aOffset + 2] << 8) +

        aBlock[aOffset + 3];

    }

TInt ReadIntFromBlock(const TDesC8& aBlock, TInt aOffset)

    {

    return (aBlock[aOffset] << 24) +

        (aBlock[aOffset + 1] << 16) +

        (aBlock[aOffset + 2] << 8) +

        aBlock[aOffset + 3];

    }

TUint16 ReadUint16FromBlock(const TDesC8& aBlock, TInt aOffset)

    {

    return ((aBlock[aOffset] << 8) + aBlock[aOffset + 1]);

    }

#endif

CApaDRMRecognizer::CApaDRMRecognizer():

    CApaDataRecognizerType( KUidDRMRecognizer,CApaDataRecognizerType::ENormal )

{

    iCountDataTypes = 0;

    return;

}

CApaDRMRecognizer::~CApaDRMRecognizer()

{

}

CApaDataRecognizerType* CApaDRMRecognizer::CreateRecognizerL()

{

}

TUint CApaDRMRecognizer::PreferredBufSize()

{

    return KMaxBufferLength;

}

#ifdef _DEBUG

TDataType CApaDRMRecognizer::SupportedDataTypeL( TInt aIndex ) const

#else

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

#endif

{

__ASSERT_DEBUG( aIndex >= 0 && aIndex < iCountDataTypes, User::Invariant() );

    return TDataType( _L8("application/vdn.omd.drm.content") ); // this should never be run

}

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

{

    if ( aBuffer.Size() < 3)

        {

        return;

        }

#ifdef RECOGNIZE_KEY_CHAIN

    // Recognize device key chain

    if ( aName.Length() > 3 && aName.Right(4).CompareF(_L(".dkc")) == 0)

        {

        iConfidence = ECertain;

        iDataType = TDataType( _L8("application/x-device-key-chain") );

        return;

        }

#endif

#ifdef DRM_OMA2_ENABLED

    if ( contentTypeLen < KMinContentTypeLen || contentURILen == 0 )

    {

        return;

    }

    if ( version != KDCFVersionSupported )

    {

        return;

    }

    // Too little data received

    if ( aBuffer.Size() < ( contentTypeLen + KDCFHeaderLength ) )

    {

        return;

    }

    TPtrC8 mimeType = aBuffer.Mid( KDCFHeaderLength, contentTypeLen );

    if ( mimeType.Locate( '/' ) != KErrNotFound )

    {

        iConfidence = ECertain;

        iDataType=TDataType( mimeType );

    }

    return;

}

#ifdef DRM_OMA2_ENABLED

TBool CApaDRMRecognizer::RecognizeRoapTrigger( const TDesC8& aBuffer )

{

        if ( aBuffer.FindF( KRoapTriggerElement() ) != KErrNotFound

             || aBuffer.FindF( KRoapTriggerElement2() ) != KErrNotFound )

        {

            iConfidence = ECertain;

            iDataType=TDataType( KRoapTriggerType() );

            return ETrue;

        }

    return EFalse;

}

TBool CApaDRMRecognizer::RecognizeODF( const TDesC8& aBuffer )

{

        {

        }

}

#endif

EXPORT_C const TImplementationProxy* ImplementationGroupProxy(TInt& aTableCount)

    {

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

    return ImplementationTable;

    }