text: /* The copyright in this software is being made available under the BSD
   * License, included below. This software may be subject to other third party
   * and contributor rights, including patent rights, and no such rights are
   * granted under this license.
   *
   * Copyright (c) 2010-2017, ITU/ISO/IEC
   * 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 the ITU/ISO/IEC 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 HOLDER 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.
   */
  
  #pragma once
  
  #ifndef __ANNEXBWRITE__
  #define __ANNEXBWRITE__
  
  #include <ostream>
  #include "NALwrite.h"
  
  //! \ingroup EncoderLib
  //! \{
  
  /**
   * write all NALunits in au to bytestream out in a manner satisfying
   * AnnexB of AVC.  NALunits are written in the order they are found in au.
   * the zero_byte word is appended to:
   *  - the initial startcode in the access unit,
   *  - any SPS/PPS nal units
   */
  static std::vector<UInt> writeAnnexB(std::ostream& out, const AccessUnit& au)
  {
    std::vector<UInt> annexBsizes;
  
    for (AccessUnit::const_iterator it = au.begin(); it != au.end(); it++)
    {
      const NALUnitEBSP& nalu = **it;
      UInt size = 0; /* size of annexB unit in bytes */
  
      static const UChar start_code_prefix[] = {0,0,0,1};
      if (it == au.begin() || nalu.m_nalUnitType == NAL_UNIT_VPS || nalu.m_nalUnitType == NAL_UNIT_SPS || nalu.m_nalUnitType == NAL_UNIT_PPS)
      {
        /* From AVC, When any of the following conditions are fulfilled, the
         * zero_byte syntax element shall be present:
         *  - the nal_unit_type within the nal_unit() is equal to 7 (sequence
         *    parameter set) or 8 (picture parameter set),
         *  - the byte stream NAL unit syntax structure contains the first NAL
         *    unit of an access unit in decoding order, as specified by subclause
         *    7.4.1.2.3.
         */
        out.write(reinterpret_cast<const TChar*>(start_code_prefix), 4);
        size += 4;
      }
      else
      {
        out.write(reinterpret_cast<const TChar*>(start_code_prefix+1), 3);
        size += 3;
      }
      out << nalu.m_nalUnitData.str();
      size += UInt(nalu.m_nalUnitData.str().size());
  
      annexBsizes.push_back(size);
    }
  
    return annexBsizes;
  }
  //! \}
  
  #endif
  