/****************************************************************************
** libmatroska : parse Matroska files, see http://www.matroska.org/
**
** <file/class description>
**
** Copyright (C) 2002-2010 Steve Lhomme.  All rights reserved.
**
** This library is free software; you can redistribute it and/or
** modify it under the terms of the GNU Lesser General Public
** License as published by the Free Software Foundation; either
** version 2.1 of the License, or (at your option) any later version.
**
** This library is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
** Lesser General Public License for more details.
**
** You should have received a copy of the GNU Lesser General Public
** License along with this library; if not, write to the Free Software
** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
**
** See http://www.gnu.org/licenses/lgpl-2.1.html for LGPL licensing information.**
** Contact license@matroska.org if any conditions of this licensing are
** not clear to you.
**
**********************************************************************/

/*!
  \file
  \version \$Id: KaxBlockData.cpp 1226 2005-10-13 21:16:43Z robux4 $
  \author Steve Lhomme     <robux4 @ users.sf.net>
*/
#include <cassert>

#include "matroska/KaxBlockData.h"
#include "matroska/KaxContexts.h"
#include "matroska/KaxBlock.h"
#include "matroska/KaxDefines.h"
#include "matroska/KaxSemantic.h"

using namespace LIBEBML_NAMESPACE;

START_LIBMATROSKA_NAMESPACE

const KaxBlockBlob & KaxReferenceBlock::RefBlock() const
{
  assert(RefdBlock != nullptr);
  return *RefdBlock;
}

KaxReferenceBlock::KaxReferenceBlock(EBML_EXTRA_DEF)
  :EBML_DEF_SINTEGER(KaxReferenceBlock)EBML_DEF_SEP
  RefdBlock(nullptr)
  ,ParentBlock(nullptr)
  ,bTimecodeSet(false)
  ,bOurBlob(false)
{
  bTimecodeSet = false;
}

KaxReferenceBlock::KaxReferenceBlock(const KaxReferenceBlock & ElementToClone)
  :EbmlSInteger(ElementToClone)
  ,RefdBlock(nullptr)
  ,ParentBlock(nullptr)
  ,bTimecodeSet(ElementToClone.bTimecodeSet)
  ,bOurBlob(false)
{
}

KaxReferenceBlock::~KaxReferenceBlock()
{
  FreeBlob();
}

void KaxReferenceBlock::FreeBlob()
{
  if (bOurBlob && RefdBlock!=nullptr)
    delete RefdBlock;
  RefdBlock = nullptr;
}

filepos_t KaxReferenceBlock::UpdateSize(bool bSaveDefault, bool bForceRender)
{
  if (!bTimecodeSet) {
    assert(RefdBlock != nullptr);
    assert(ParentBlock != nullptr);

    const KaxInternalBlock &block = *RefdBlock;
    *static_cast<EbmlSInteger*>(this) = (int64(block.GlobalTimecode()) - int64(ParentBlock->GlobalTimecode())) / int64(ParentBlock->GlobalTimecodeScale());
  }
  return EbmlSInteger::UpdateSize(bSaveDefault, bForceRender);
}

void KaxReferenceBlock::SetReferencedBlock(const KaxBlockBlob * aRefdBlock)
{
  assert(RefdBlock == nullptr);
  assert(aRefdBlock != nullptr);
  FreeBlob();
  RefdBlock = aRefdBlock;
  bOurBlob = true;
  SetValueIsSet();
}

void KaxReferenceBlock::SetReferencedBlock(const KaxBlockGroup & aRefdBlock)
{
  FreeBlob();
  auto block_blob = new KaxBlockBlob(BLOCK_BLOB_NO_SIMPLE);
  block_blob->SetBlockGroup(*const_cast<KaxBlockGroup*>(&aRefdBlock));
  RefdBlock = block_blob;
  bOurBlob = true;
  SetValueIsSet();
}

END_LIBMATROSKA_NAMESPACE
