text: /*
   * Copyright (C) 2013, British Broadcasting Corporation
   * All Rights Reserved.
   *
   * Author: Philip de Nier
   *
   * 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 the British Broadcasting Corporation nor the names
   *       of its 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.
   */
  
  #ifdef HAVE_CONFIG_H
  #include "config.h"
  #endif
  
  #include <bmx/mxf_helper/DataMXFDescriptorHelper.h>
  #include <bmx/mxf_helper/ANCDataMXFDescriptorHelper.h>
  #include <bmx/mxf_helper/VBIDataMXFDescriptorHelper.h>
  #include <bmx/BMXException.h>
  #include <bmx/Logging.h>
  
  using namespace std;
  using namespace bmx;
  using namespace mxfpp;
  
  
  
  EssenceType DataMXFDescriptorHelper::IsSupported(mxfpp::FileDescriptor *file_descriptor, mxfUL alternative_ec_label)
  {
      GenericDataEssenceDescriptor *data_descriptor = dynamic_cast<GenericDataEssenceDescriptor*>(file_descriptor);
      if (!data_descriptor)
          return UNKNOWN_ESSENCE_TYPE;
  
      EssenceType essence_type = ANCDataMXFDescriptorHelper::IsSupported(file_descriptor, alternative_ec_label);
      if (essence_type)
          return essence_type;
      essence_type = VBIDataMXFDescriptorHelper::IsSupported(file_descriptor, alternative_ec_label);
      if (essence_type)
          return essence_type;
  
      return DATA_ESSENCE;
  }
  
  DataMXFDescriptorHelper* DataMXFDescriptorHelper::Create(mxfpp::FileDescriptor *file_descriptor, uint16_t mxf_version,
                                                           mxfUL alternative_ec_label)
  {
      DataMXFDescriptorHelper *helper;
      if (ANCDataMXFDescriptorHelper::IsSupported(file_descriptor, alternative_ec_label))
          helper = new ANCDataMXFDescriptorHelper();
      else if (VBIDataMXFDescriptorHelper::IsSupported(file_descriptor, alternative_ec_label))
          helper = new VBIDataMXFDescriptorHelper();
      else
          helper = new DataMXFDescriptorHelper();
  
      helper->Initialize(file_descriptor, mxf_version, alternative_ec_label);
  
      return helper;
  }
  
  bool DataMXFDescriptorHelper::IsSupported(EssenceType essence_type)
  {
      return ANCDataMXFDescriptorHelper::IsSupported(essence_type) ||
             VBIDataMXFDescriptorHelper::IsSupported(essence_type);
  }
  
  MXFDescriptorHelper* DataMXFDescriptorHelper::Create(EssenceType essence_type)
  {
      BMX_ASSERT(IsSupported(essence_type));
  
      DataMXFDescriptorHelper *helper;
      if (ANCDataMXFDescriptorHelper::IsSupported(essence_type))
          helper = new ANCDataMXFDescriptorHelper();
      else
          helper = new VBIDataMXFDescriptorHelper();
  
      helper->SetEssenceType(essence_type);
  
      return helper;
  }
  
  DataMXFDescriptorHelper::DataMXFDescriptorHelper()
  : MXFDescriptorHelper()
  {
      mEssenceType = DATA_ESSENCE;
  }
  
  DataMXFDescriptorHelper::~DataMXFDescriptorHelper()
  {
  }
  
  void DataMXFDescriptorHelper::Initialize(FileDescriptor *file_descriptor, uint16_t mxf_version, mxfUL alternative_ec_label)
  {
      MXFDescriptorHelper::Initialize(file_descriptor, mxf_version, alternative_ec_label);
  
      mEssenceType = DATA_ESSENCE;
  }
  
  FileDescriptor* DataMXFDescriptorHelper::CreateFileDescriptor(HeaderMetadata *header_metadata)
  {
      (void)header_metadata;
  
      // implemented by child classes only
      BMX_ASSERT(false);
      return 0;
  }
  
  uint32_t DataMXFDescriptorHelper::GetSampleSize()
  {
      // implemented by child classes only
      BMX_ASSERT(false);
      return 0;
  }
  
  mxfUL DataMXFDescriptorHelper::ChooseEssenceContainerUL() const
  {
      // implemented by child classes only
      BMX_ASSERT(false);
      return g_Null_UL;
  }
  
  