text: //-*****************************************************************************
  //
  // Copyright (c) 2013,
  //  Sony Pictures Imageworks, Inc. and
  //  Industrial Light & Magic, a division of Lucasfilm Entertainment Company Ltd.
  //
  // All rights reserved.
  //
  // Redistribution and use in source and binary forms, with or without
  // modification, are permitted provided that the following conditions are
  // met:
  // *       Redistributions of source code must retain the above copyright
  // notice, this list of conditions and the following disclaimer.
  // *       Redistributions in binary form must reproduce the above
  // copyright notice, this list of conditions and the following disclaimer
  // in the documentation and/or other materials provided with the
  // distribution.
  // *       Neither the name of Sony Pictures Imageworks, nor
  // Industrial Light & Magic nor the names of their contributors may be used
  // to endorse or promote products derived from this software without specific
  // prior written permission.
  //
  // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  //
  //-*****************************************************************************
  
  #include <Alembic/AbcCoreOgawa/SprImpl.h>
  #include <Alembic/AbcCoreOgawa/ReadUtil.h>
  #include <Alembic/AbcCoreOgawa/StreamManager.h>
  #include <Alembic/AbcCoreOgawa/OrImpl.h>
  
  namespace Alembic {
  namespace AbcCoreOgawa {
  namespace ALEMBIC_VERSION_NS {
  
  //-*****************************************************************************
  SprImpl::SprImpl( AbcA::CompoundPropertyReaderPtr iParent,
                    Ogawa::IGroupPtr iGroup,
                    PropertyHeaderPtr iHeader )
    : m_parent( iParent )
    , m_group( iGroup )
    , m_header( iHeader )
  {
      // Validate all inputs.
      ABCA_ASSERT( m_parent, "Invalid parent" );
      ABCA_ASSERT( m_group, "Invalid scalar property group" );
      ABCA_ASSERT( m_header, "Invalid header" );
  
      if ( m_header->header.getPropertyType() != AbcA::kScalarProperty )
      {
          ABCA_THROW( "Attempted to create a ScalarPropertyReader from a "
                      "non-array property type" );
      }
  }
  
  //-*****************************************************************************
  const AbcA::PropertyHeader & SprImpl::getHeader() const
  {
      return m_header->header;
  }
  
  //-*****************************************************************************
  AbcA::ObjectReaderPtr SprImpl::getObject()
  {
      return m_parent->getObject();
  }
  
  //-*****************************************************************************
  AbcA::CompoundPropertyReaderPtr SprImpl::getParent()
  {
      return m_parent;
  }
  
  //-*****************************************************************************
  AbcA::ScalarPropertyReaderPtr SprImpl::asScalarPtr()
  {
      return shared_from_this();
  }
  
  //-*****************************************************************************
  size_t SprImpl::getNumSamples()
  {
      return m_header->nextSampleIndex;
  }
  
  //-*****************************************************************************
  bool SprImpl::isConstant()
  {
      return ( m_header->firstChangedIndex == 0 );
  }
  
  //-*****************************************************************************
  void SprImpl::getSample( index_t iSampleIndex, void * iIntoLocation )
  {
      size_t index = m_header->verifyIndex( iSampleIndex );
  
      StreamIDPtr streamId = Alembic::Util::dynamic_pointer_cast< ArImpl,
          AbcA::ArchiveReader > ( getObject()->getArchive() )->getStreamID();
  
      std::size_t id = streamId->getID();
      Ogawa::IDataPtr data = m_group->getData( index, id );
      AbcA::DataType dt = m_header->header.getDataType();
  
      // Check to make sure the Ogawa data size matches our expected scalar
      // property size, the + 16 is to account for the data key.
      if ( dt.getPod() < Util::kStringPOD && data &&
          data->getSize() != dt.getNumBytes() + 16 )
      {
          ABCA_THROW( "ScalarPropertyReader::getSample size is not correct "
                      "expected: " << dt.getNumBytes() << " got: " <<
                      data->getSize() - 16 );
      }
  
      ReadData( iIntoLocation, data, id, dt, dt.getPod() );
  }
  
  //-*****************************************************************************
  std::pair<index_t, chrono_t> SprImpl::getFloorIndex( chrono_t iTime )
  {
      return m_header->header.getTimeSampling()->getFloorIndex( iTime,
          m_header->nextSampleIndex );
  }
  
  //-*****************************************************************************
  std::pair<index_t, chrono_t> SprImpl::getCeilIndex( chrono_t iTime )
  {
      return m_header->header.getTimeSampling()->getCeilIndex( iTime,
          m_header->nextSampleIndex );
  }
  
  //-*****************************************************************************
  std::pair<index_t, chrono_t> SprImpl::getNearIndex( chrono_t iTime )
  {
      return m_header->header.getTimeSampling()->getNearIndex( iTime,
          m_header->nextSampleIndex );
  }
  
  } // End namespace ALEMBIC_VERSION_NS
  } // End namespace AbcCoreOgawa
  } // End namespace Alembic
  