/*

* Copyright (c) 2004 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:  This class implements an MP4 metadata parser 

*

*/

// INCLUDE FILES

#include	"MetaDataParserMP4.h"

#ifdef _DEBUG

#include	<e32svr.h>

#endif

const TUint KCustomFileBufferSize	= 10*1024;

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

// -----------------------------------------------------------------------------

// CMetaDataParserMP4::CMetaDataParserMP4

// C++ default constructor can NOT contain any code, that

// might leave.

// -----------------------------------------------------------------------------

//

CMetaDataParserMP4::CMetaDataParserMP4()

	:	iMP4Handle(NULL)

	{

    }

// Destructor

CMetaDataParserMP4::~CMetaDataParserMP4()

	{

	MP4ParseClose(iMP4Handle);

	if ( iExists )

		{

		delete iCharacterSet;

		iFs.Close();

		}

	}

// -----------------------------------------------------------------------------

// CMetaDataParserMP4::InitializeFileL

// Symbian 2nd phase constructor can leave.

// -----------------------------------------------------------------------------

//

void CMetaDataParserMP4::InitializeFileL(

	ContentAccess::CData *aData )

    {

	MP4Err err;

	//TBuf<256> name(aFileName);

	err = MP4ParseOpenCAF(&iMP4Handle, aData);

#ifdef _DEBUG

	RDebug::Print(_L("CMetaDataParserMP4::InitializeFileL - MP4ParseOpen err = %d"), err);

#endif

	User::LeaveIfError(TranslateMP4Err(err));

	MP4Err mp4Err = MP4SetCustomFileBufferSizes( iMP4Handle, 0, 0, KCustomFileBufferSize);

	if ( (mp4Err == MP4_OK) && ValidateL() )

		{

		User::LeaveIfError(iFs.Connect());

		// Get list of charconv supported character sets

		iCharacterSet = CCnvCharacterSetConverter::CreateArrayOfCharacterSetsAvailableL(iFs);

		}

#ifdef _DEBUG

	RDebug::Print(_L("CMetaDataParserMP4::InitializeFileL - Done"));

#endif

    }

// -----------------------------------------------------------------------------

// CMetaDataParserMP4::InitializeDesL

// Symbian 2nd phase constructor can leave.

// -----------------------------------------------------------------------------

//

void CMetaDataParserMP4::InitializeDesL(

	const TDesC8& aDes )

    {

	MP4Err err;

	err = MP4ParseOpen(&iMP4Handle, NULL);

#ifdef _DEBUG

	RDebug::Print(_L("CMetaDataParserMP4::InitializeDesL - MP4ParseOpen err = %d"), err);

#endif

	User::LeaveIfError(TranslateMP4Err(err));

	TUint8* buffer = CONST_CAST(TUint8*, aDes.Ptr());

	err = MP4ParseWriteData(iMP4Handle, buffer, aDes.Size());

	User::LeaveIfError(TranslateMP4Err(err));

	// This call with empty buffer indicates to the MP4 library that this is the last buffer.

	err = MP4ParseWriteData(iMP4Handle, NULL, 0);

	User::LeaveIfError(TranslateMP4Err(err));

	if ( ValidateL() )

		{

		User::LeaveIfError(iFs.Connect());

		// Get list of charconv supported character sets

		iCharacterSet = CCnvCharacterSetConverter::CreateArrayOfCharacterSetsAvailableL(iFs);

		}

#ifdef _DEBUG

	RDebug::Print(_L("CMetaDataParserMP4::InitializeDesL - Done"));

#endif

    }

// -----------------------------------------------------------------------------

// CMetaDataParserMP4::TranslateMP4Err

// -----------------------------------------------------------------------------

//

TInt CMetaDataParserMP4::TranslateMP4Err(

	MP4Err aError )

	{

#ifdef _DEBUG

	RDebug::Print(_L("CMetaDataParserMP4::TranslateMP4Err [%d]"), aError);

#endif

	TInt err;

	switch ( aError )

		{

		case MP4_OK:

			err = KErrNone;

			break;

		case MP4_OUT_OF_MEMORY:

			err = KErrNoMemory;

			break;

		case MP4_NOT_AVAILABLE:

		case MP4_UDTA_NOT_FOUND:

			err = KErrNotReady;

			break;

		case MP4_FILE_ERROR:

			err = KErrBadHandle;

			break;

		case MP4_INVALID_TYPE:

			err = KErrNotSupported;

			break;

		case MP4_TIMESCALE_NOT_SET:

			err = KErrNotReady;

			break;

		case MP4_NOT_STREAMABLE:

		case MP4_NO_REQUESTED_FRAME:

		case MP4_CANT_SEEK:

		case MP4_INVALID_INPUT_STREAM:

		case MP4_NO_FRAME:

			err = KErrArgument;

			break;

		case MP4_ERROR:

		case MP4_FILE_MODE:

		case MP4_BUFFER_TOO_SMALL:

		case MP4_END_OF_VIDEO:

		case MP4_METADATA_ERROR:

		case MP4_NO_VIDEO:

		case MP4_NO_AUDIO:

			err = KErrGeneral;

			break;

		default:

			err = KErrGeneral;

			break;

		}

	return err;

	}

// -----------------------------------------------------------------------------

// CMetaDataParserMP4::GetDurationL

// -----------------------------------------------------------------------------

//

void CMetaDataParserMP4::GetDurationL(

	TMetaDataFieldId aFieldId )

	{

#ifdef _DEBUG

	RDebug::Print(_L("CMetaDataParser3gp::GetDurationL"));

#endif

	MP4Err err;

	mp4_u32 audiolength = 0; 

	mp4_u32 audiotype = 0; 

	mp4_u8 framespersample = 0;

	mp4_u32 timescale = 0;

	mp4_u32 averagebitrate = 0;

	err = MP4ParseRequestAudioDescription(iMP4Handle, &audiolength, &audiotype, &framespersample, &timescale, &averagebitrate);

	if(err == MP4_OK)

		{

		TBuf16<10> data16;

		TReal duration = (TReal)audiolength / 1000; // seconds

		TRealFormat realFormat(9, 3);

		data16.AppendNum(duration, realFormat);

		iContainer->AppendL( aFieldId, data16);

		}

	}

// -----------------------------------------------------------------------------

// CMetaDataParserMP4::ConvertToUnicodeL

// -----------------------------------------------------------------------------

//

TInt CMetaDataParserMP4::ConvertToUnicodeL(

	const TDesC8& aDesc,

	TDes16& aUnicode )

	{

	TPtrC8 unicodeData;

    TUint characterSetId = 0;

	CCnvCharacterSetConverter* charSetConv = CCnvCharacterSetConverter::NewLC();

	TInt state = CCnvCharacterSetConverter::KStateDefault;

	TInt bom = UnicodeBOM(aDesc);

	if ( bom == KUnicodeBOMBigEndian )

		{

		// UTF-16 Big Endian with BOM

		// characterSetId = KCharacterSetIdentifierUcs2;

		TPtrC8 text = StripTrailingZeroes(aDesc, 1);

		characterSetId = KCharacterSetIdentifierUnicodeBig;

		// Skip BOM & Terminate marks

		unicodeData.Set( text.Mid(2) );

		}

	else if ( bom == KUnicodeBOMLittleEndian )

		{

		// UTF-16 Big Endian with BOM

		characterSetId = KCharacterSetIdentifierUnicodeLittle;

		TPtrC8 text = StripTrailingZeroes(aDesc, 1);

		// Skip BOM & Terminate marks

		unicodeData.Set( text.Mid( 2) );

		}

	else	// KUnicodeBOMNotFound

		{

		// UTF-8

		TPtrC8 text = StripTrailingZeroes(aDesc, 0);

		characterSetId = KCharacterSetIdentifierUtf8;

		unicodeData.Set( text );

		}

	charSetConv->PrepareToConvertToOrFromL(characterSetId, *iCharacterSet, iFs);

	TInt err = charSetConv->ConvertToUnicode(aUnicode, unicodeData, state);

#ifdef _DEBUG

	RDebug::Print(_L("CMetaDataParserID3v24::ConvertToUnicode :-> Tag Size[%d] Unicode Tag Size[%d]Bytes Unconverted[%d]"),

		unicodeData.Length(), aUnicode.Length(), err);

#endif

	CleanupStack::PopAndDestroy();	// charSetConv

	return err;

	}

//  End of File