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// =================================================================================================
// Copyright Adobe
// Copyright 2010 Adobe
// All Rights Reserved
//
// NOTICE: Adobe permits you to use, modify, and distribute this file in accordance with the terms
// of the Adobe license agreement accompanying it.
// =================================================================================================
#include <string.h>
#include "public/include/XMP_Environment.h" // ! XMP_Environment.h must be the first included header.
#include "public/include/XMP_Const.h"
#include "XMPFiles/source/FormatSupport/WAVE/DISPMetadata.h"
#include "source/Endian.h"
using namespace IFF_RIFF;
//-----------------------------------------------------------------------------
//
// DISPMetadata::isValidDISP(...)
//
// Purpose: [static] Check if the passed data is a valid DISP chunk. Valid in
// of is it a DISP chunk that XMP should process.
//
//-----------------------------------------------------------------------------
bool DISPMetadata::isValidDISP( const XMP_Uns8* chunkData, XMP_Uns64 size )
{
return ( ( size >= 4 ) && ( LittleEndian::getInstance().getUns32( chunkData ) == 0x0001 ) );
}
//-----------------------------------------------------------------------------
//
// DISPMetadata::DISPMetadata(...)
//
// Purpose: ctor/dtor
//
//-----------------------------------------------------------------------------
DISPMetadata::DISPMetadata()
{
}
DISPMetadata::~DISPMetadata()
{
}
//-----------------------------------------------------------------------------
//
// DISPMetadata::parse(...)
//
// Purpose: Parses the given memory block and creates a data model representation
// The implementation expects that the memory block is the data area of
// the DISP chunk.
// Throws exceptions if parsing is not possible
//
//-----------------------------------------------------------------------------
void DISPMetadata::parse( const XMP_Uns8* chunkData, XMP_Uns64 size )
{
if( DISPMetadata::isValidDISP( chunkData, size ) )
{
this->setValue<std::string>( kTitle, std::string( (char*)&chunkData[4], static_cast<std::string::size_type>(size-4) ) );
this->resetChanges();
}
else
{
XMP_Throw ( "Not a valid DISP chunk", kXMPErr_BadFileFormat );
}
}
//-----------------------------------------------------------------------------
//
// DISPMetadata::serialize(...)
//
// Purpose: Serializes the data model to a memory block.
// The memory block will be the data area of a DISP chunk.
// Throws exceptions if serializing is not possible
//
//-----------------------------------------------------------------------------
XMP_Uns64 DISPMetadata::serialize( XMP_Uns8** outBuffer )
{
XMP_Uns64 size = 0;
if( outBuffer != NULL && this->valueExists( kTitle ) )
{
std::string title = this->getValue<std::string>( kTitle );
size = 4 + title.length(); // at least 4bytes for the type value of the DISP chunk
// [2500563] DISP chunk must be of even length for WAVE,
// as pad byte is not interpreted correctly by third-party tools
if ( size % 2 != 0 )
{
size++;
}
XMP_Uns8* buffer = new XMP_Uns8[static_cast<size_t>(size)];
memset( buffer, 0, static_cast<size_t>(size) );
//
// DISP type
//
buffer[0] = 1;
//
// copy string into buffer
//
memcpy( &buffer[4], title.c_str(), title.length() );
*outBuffer = buffer;
}
else
{
XMP_Throw ( "Invalid buffer", kXMPErr_InternalFailure );
}
return size;
}
//-----------------------------------------------------------------------------
//
// DISPMetadata::isEmptyValue(...)
//
// Purpose: Is the value of the passed ValueObject and its id "empty"?
//
//-----------------------------------------------------------------------------
bool DISPMetadata::isEmptyValue( XMP_Uns32 /*id*/, ValueObject& valueObj )
{
TValueObject<std::string>* strObj = dynamic_cast<TValueObject<std::string>*>(&valueObj);
return ( strObj == NULL || ( strObj != NULL && strObj->getValue().empty() ) );
}
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