/*
Copyright (c) 2004-2013, John Hurst
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/*! \file    AS_DCP_MPEG2.cpp
    \version $Id: AS_DCP_MPEG2.cpp,v 1.44 2015/10/07 16:41:23 jhurst Exp $       
    \brief   AS-DCP library, MPEG2 essence reader and writer implementation
*/

#include "AS_DCP_internal.h"
#include <iostream>
#include <iomanip>


//------------------------------------------------------------------------------------------

static std::string MPEG_PACKAGE_LABEL = "File Package: SMPTE 381M frame wrapping of MPEG2 video elementary stream";
static std::string PICT_DEF_LABEL = "Picture Track";

//
ASDCP::Result_t
MD_to_MPEG2_VDesc(MXF::MPEG2VideoDescriptor* VDescObj, MPEG2::VideoDescriptor& VDesc)
{
  ASDCP_TEST_NULL(VDescObj);

  VDesc.SampleRate             = VDescObj->SampleRate;
  VDesc.EditRate               = VDescObj->SampleRate;
  VDesc.FrameRate              = VDescObj->SampleRate.Numerator;
  assert(VDescObj->ContainerDuration <= 0xFFFFFFFFL);
  VDesc.ContainerDuration      = (ui32_t) VDescObj->ContainerDuration;

  VDesc.FrameLayout            = VDescObj->FrameLayout;
  VDesc.StoredWidth            = VDescObj->StoredWidth;
  VDesc.StoredHeight           = VDescObj->StoredHeight;
  VDesc.AspectRatio            = VDescObj->AspectRatio;

  VDesc.ComponentDepth         = VDescObj->ComponentDepth;
  VDesc.HorizontalSubsampling  = VDescObj->HorizontalSubsampling;
  VDesc.VerticalSubsampling    = VDescObj->VerticalSubsampling;
  VDesc.ColorSiting            = VDescObj->ColorSiting;
  VDesc.CodedContentType       = VDescObj->CodedContentType;

  VDesc.LowDelay               = VDescObj->LowDelay.get() == 0 ? false : true;
  VDesc.BitRate                = VDescObj->BitRate;
  VDesc.ProfileAndLevel        = VDescObj->ProfileAndLevel;
  return RESULT_OK;
}


//
ASDCP::Result_t
MPEG2_VDesc_to_MD(MPEG2::VideoDescriptor& VDesc, MXF::MPEG2VideoDescriptor* VDescObj)
{
  ASDCP_TEST_NULL(VDescObj);

  VDescObj->SampleRate = VDesc.SampleRate;
  VDescObj->ContainerDuration = VDesc.ContainerDuration;

  VDescObj->FrameLayout = VDesc.FrameLayout;
  VDescObj->StoredWidth = VDesc.StoredWidth;
  VDescObj->StoredHeight = VDesc.StoredHeight;
  VDescObj->AspectRatio = VDesc.AspectRatio;

  VDescObj->ComponentDepth = VDesc.ComponentDepth;
  VDescObj->HorizontalSubsampling = VDesc.HorizontalSubsampling;
  VDescObj->VerticalSubsampling = VDesc.VerticalSubsampling;
  VDescObj->ColorSiting = VDesc.ColorSiting;
  VDescObj->CodedContentType = VDesc.CodedContentType;

  VDescObj->LowDelay = VDesc.LowDelay ? 1 : 0;
  VDescObj->BitRate = VDesc.BitRate;
  VDescObj->ProfileAndLevel = VDesc.ProfileAndLevel;
  return RESULT_OK;
}

//
std::ostream&
ASDCP::MPEG2::operator << (std::ostream& strm, const VideoDescriptor& VDesc)
{
  strm << "        SampleRate: " << VDesc.SampleRate.Numerator << "/" << VDesc.SampleRate.Denominator << std::endl;
  strm << "       FrameLayout: " << (unsigned) VDesc.FrameLayout << std::endl;
  strm << "       StoredWidth: " << (unsigned) VDesc.StoredWidth << std::endl;
  strm << "      StoredHeight: " << (unsigned) VDesc.StoredHeight << std::endl;
  strm << "       AspectRatio: " << VDesc.AspectRatio.Numerator << "/" << VDesc.AspectRatio.Denominator << std::endl;
  strm << "    ComponentDepth: " << (unsigned) VDesc.ComponentDepth << std::endl;
  strm << " HorizontalSubsmpl: " << (unsigned) VDesc.HorizontalSubsampling << std::endl;
  strm << "   VerticalSubsmpl: " << (unsigned) VDesc.VerticalSubsampling << std::endl;
  strm << "       ColorSiting: " << (unsigned) VDesc.ColorSiting << std::endl;
  strm << "  CodedContentType: " << (unsigned) VDesc.CodedContentType << std::endl;
  strm << "          LowDelay: " << (unsigned) VDesc.LowDelay << std::endl;
  strm << "           BitRate: " << (unsigned) VDesc.BitRate << std::endl;
  strm << "   ProfileAndLevel: " << (unsigned) VDesc.ProfileAndLevel << std::endl;
  strm << " ContainerDuration: " << (unsigned) VDesc.ContainerDuration << std::endl;

  return strm;
}

//
void
ASDCP::MPEG2::VideoDescriptorDump(const VideoDescriptor& VDesc, FILE* stream)
{
  if ( stream == 0 )
    stream = stderr;

  fprintf(stream, "\
        SampleRate: %d/%d\n\
       FrameLayout: %u\n\
       StoredWidth: %u\n\
      StoredHeight: %u\n\
       AspectRatio: %d/%d\n\
    ComponentDepth: %u\n\
 HorizontalSubsmpl: %u\n\
   VerticalSubsmpl: %u\n\
       ColorSiting: %u\n\
  CodedContentType: %u\n\
          LowDelay: %u\n\
           BitRate: %u\n\
   ProfileAndLevel: %u\n\
 ContainerDuration: %u\n",
	  VDesc.SampleRate.Numerator ,VDesc.SampleRate.Denominator,
	  VDesc.FrameLayout,
	  VDesc.StoredWidth,
	  VDesc.StoredHeight,
	  VDesc.AspectRatio.Numerator ,VDesc.AspectRatio.Denominator,
	  VDesc.ComponentDepth,
	  VDesc.HorizontalSubsampling,
	  VDesc.VerticalSubsampling,
	  VDesc.ColorSiting,
	  VDesc.CodedContentType,
	  VDesc.LowDelay,
	  VDesc.BitRate,
	  VDesc.ProfileAndLevel,
	  VDesc.ContainerDuration
	  );
}

//------------------------------------------------------------------------------------------
//
// hidden, internal implementation of MPEG2 reader

class ASDCP::MPEG2::MXFReader::h__Reader : public ASDCP::h__ASDCPReader
{
  ASDCP_NO_COPY_CONSTRUCT(h__Reader);
  h__Reader();

public:
  VideoDescriptor m_VDesc;        // video parameter list

  h__Reader(const Dictionary& d) : ASDCP::h__ASDCPReader(d) {}
  virtual ~h__Reader() {}
  Result_t    OpenRead(const std::string&);
  Result_t    ReadFrame(ui32_t, FrameBuffer&, AESDecContext*, HMACContext*);
  Result_t    ReadFrameGOPStart(ui32_t, FrameBuffer&, AESDecContext*, HMACContext*);
  Result_t    FindFrameGOPStart(ui32_t, ui32_t&);
  Result_t    FrameType(ui32_t FrameNum, FrameType_t& type);
};


//
//
ASDCP::Result_t
ASDCP::MPEG2::MXFReader::h__Reader::OpenRead(const std::string& filename)
{
  Result_t result = OpenMXFRead(filename);

  if( ASDCP_SUCCESS(result) )
    {
      InterchangeObject* Object = 0;

      if ( ASDCP_SUCCESS(m_HeaderPart.GetMDObjectByType(OBJ_TYPE_ARGS(MPEG2VideoDescriptor), &Object)) )
	{
	  if ( Object == 0 )
	    {
	      DefaultLogSink().Error("MPEG2VideoDescriptor object not found.\n");
	      return RESULT_FORMAT;
	    }

	  result = MD_to_MPEG2_VDesc((MXF::MPEG2VideoDescriptor*)Object, m_VDesc);
	}
    }

  return result;
}


//
//
ASDCP::Result_t
ASDCP::MPEG2::MXFReader::h__Reader::ReadFrameGOPStart(ui32_t FrameNum, FrameBuffer& FrameBuf,
						      AESDecContext* Ctx, HMACContext* HMAC)
{
  ui32_t KeyFrameNum;

  Result_t result = FindFrameGOPStart(FrameNum, KeyFrameNum);

  if ( ASDCP_SUCCESS(result) )
    result = ReadFrame(KeyFrameNum, FrameBuf, Ctx, HMAC);

  return result;
}


//
//
ASDCP::Result_t
ASDCP::MPEG2::MXFReader::h__Reader::FindFrameGOPStart(ui32_t FrameNum, ui32_t& KeyFrameNum)
{
  KeyFrameNum = 0;

  if ( ! m_File.IsOpen() )
    return RESULT_INIT;

  // look up frame index node
  IndexTableSegment::IndexEntry TmpEntry;

  if ( ASDCP_FAILURE(m_IndexAccess.Lookup(FrameNum, TmpEntry)) )
    {
      return RESULT_RANGE;
    }

  KeyFrameNum = FrameNum - TmpEntry.KeyFrameOffset;

  return RESULT_OK;
}

//
ASDCP::Result_t
ASDCP::MPEG2::MXFReader::h__Reader::FrameType(ui32_t FrameNum, FrameType_t& type)
{
  if ( ! m_File.IsOpen() )
    return RESULT_INIT;

  // look up frame index node
  IndexTableSegment::IndexEntry TmpEntry;

  if ( ASDCP_FAILURE(m_IndexAccess.Lookup(FrameNum, TmpEntry)) )
    {
      return RESULT_RANGE;
    }

  type = ( (TmpEntry.Flags & 0x0f) == 3 ) ? FRAME_B : ( (TmpEntry.Flags & 0x0f) == 2 ) ? FRAME_P : FRAME_I;
  return RESULT_OK;
}


//
//
ASDCP::Result_t
ASDCP::MPEG2::MXFReader::h__Reader::ReadFrame(ui32_t FrameNum, FrameBuffer& FrameBuf,
					      AESDecContext* Ctx, HMACContext* HMAC)
{
  assert(m_Dict);
  if ( ! m_File.IsOpen() )
    return RESULT_INIT;

  Result_t result = ReadEKLVFrame(FrameNum, FrameBuf, m_Dict->ul(MDD_MPEG2Essence), Ctx, HMAC);

  if ( ASDCP_FAILURE(result) )
    return result;

  IndexTableSegment::IndexEntry TmpEntry;
  m_IndexAccess.Lookup(FrameNum, TmpEntry);

  switch ( ( TmpEntry.Flags >> 4 ) & 0x03 )
    {
    case 0:  FrameBuf.FrameType(FRAME_I); break;
    case 2:  FrameBuf.FrameType(FRAME_P); break;
    case 3:  FrameBuf.FrameType(FRAME_B); break;
    default: FrameBuf.FrameType(FRAME_U);
    }

  FrameBuf.TemporalOffset(TmpEntry.TemporalOffset);
  FrameBuf.GOPStart(TmpEntry.Flags & 0x40 ? true : false);
  FrameBuf.ClosedGOP(TmpEntry.Flags & 0x80 ? true : false);

  return RESULT_OK;
}

//------------------------------------------------------------------------------------------


//
void
ASDCP::MPEG2::FrameBuffer::Dump(FILE* stream, ui32_t dump_len) const
{
  if ( stream == 0 )
    stream = stderr;

  fprintf(stream, "Frame: %06u, %c%-2hhu, %7u bytes",
	  m_FrameNumber, FrameTypeChar(m_FrameType), m_TemporalOffset, m_Size);

  if ( m_GOPStart )
    fprintf(stream, " (start %s GOP)", ( m_ClosedGOP ? "closed" : "open"));
  
  fputc('\n', stream);

  if ( dump_len > 0 )
    Kumu::hexdump(m_Data, dump_len, stream);
}


//------------------------------------------------------------------------------------------

ASDCP::MPEG2::MXFReader::MXFReader()
{
  m_Reader = new h__Reader(DefaultCompositeDict());
}


ASDCP::MPEG2::MXFReader::~MXFReader()
{
  if ( m_Reader && m_Reader->m_File.IsOpen() )
    m_Reader->Close();
}

// Warning: direct manipulation of MXF structures can interfere
// with the normal operation of the wrapper.  Caveat emptor!
//
ASDCP::MXF::OP1aHeader&
ASDCP::MPEG2::MXFReader::OP1aHeader()
{
  if ( m_Reader.empty() )
    {
      assert(g_OP1aHeader);
      return *g_OP1aHeader;
    }

  return m_Reader->m_HeaderPart;
}

// Warning: direct manipulation of MXF structures can interfere
// with the normal operation of the wrapper.  Caveat emptor!
//
ASDCP::MXF::OPAtomIndexFooter&
ASDCP::MPEG2::MXFReader::OPAtomIndexFooter()
{
  if ( m_Reader.empty() )
    {
      assert(g_OPAtomIndexFooter);
      return *g_OPAtomIndexFooter;
    }

  return m_Reader->m_IndexAccess;
}

// Warning: direct manipulation of MXF structures can interfere
// with the normal operation of the wrapper.  Caveat emptor!
//
ASDCP::MXF::RIP&
ASDCP::MPEG2::MXFReader::RIP()
{
  if ( m_Reader.empty() )
    {
      assert(g_RIP);
      return *g_RIP;
    }

  return m_Reader->m_RIP;
}

// Open the file for reading. The file must exist. Returns error if the
// operation cannot be completed.
ASDCP::Result_t
ASDCP::MPEG2::MXFReader::OpenRead(const std::string& filename) const
{
  return m_Reader->OpenRead(filename);
}

//
ASDCP::Result_t
ASDCP::MPEG2::MXFReader::ReadFrame(ui32_t FrameNum, FrameBuffer& FrameBuf,
				   AESDecContext* Ctx, HMACContext* HMAC) const
{
  if ( m_Reader && m_Reader->m_File.IsOpen() )
    return m_Reader->ReadFrame(FrameNum, FrameBuf, Ctx, HMAC);

  return RESULT_INIT;
}


//
ASDCP::Result_t
ASDCP::MPEG2::MXFReader::LocateFrame(ui32_t FrameNum, Kumu::fpos_t& streamOffset, i8_t& temporalOffset, i8_t& keyFrameOffset) const
{
    return m_Reader->LocateFrame(FrameNum, streamOffset, temporalOffset, keyFrameOffset);
}

//
ASDCP::Result_t
ASDCP::MPEG2::MXFReader::ReadFrameGOPStart(ui32_t FrameNum, FrameBuffer& FrameBuf,
					   AESDecContext* Ctx, HMACContext* HMAC) const
{
  if ( m_Reader && m_Reader->m_File.IsOpen() )
    return m_Reader->ReadFrameGOPStart(FrameNum, FrameBuf, Ctx, HMAC);

  return RESULT_INIT;
}


//
ASDCP::Result_t
ASDCP::MPEG2::MXFReader::FindFrameGOPStart(ui32_t FrameNum, ui32_t& KeyFrameNum) const
{
  if ( m_Reader && m_Reader->m_File.IsOpen() )
    return m_Reader->FindFrameGOPStart(FrameNum, KeyFrameNum);

  return RESULT_INIT;
}


// Fill the struct with the values from the file's header.
// Returns RESULT_INIT if the file is not open.
ASDCP::Result_t
ASDCP::MPEG2::MXFReader::FillVideoDescriptor(VideoDescriptor& VDesc) const
{
  if ( m_Reader && m_Reader->m_File.IsOpen() )
    {
      VDesc = m_Reader->m_VDesc;
      return RESULT_OK;
    }

  return RESULT_INIT;
}


// Fill the struct with the values from the file's header.
// Returns RESULT_INIT if the file is not open.
ASDCP::Result_t
ASDCP::MPEG2::MXFReader::FillWriterInfo(WriterInfo& Info) const
{
  if ( m_Reader && m_Reader->m_File.IsOpen() )
    {
      Info = m_Reader->m_Info;
      return RESULT_OK;
    }

  return RESULT_INIT;
}

//
void
ASDCP::MPEG2::MXFReader::DumpHeaderMetadata(FILE* stream) const
{
  if ( m_Reader->m_File.IsOpen() )
    m_Reader->m_HeaderPart.Dump(stream);
}


//
void
ASDCP::MPEG2::MXFReader::DumpIndex(FILE* stream) const
{
  if ( m_Reader->m_File.IsOpen() )
    m_Reader->m_IndexAccess.Dump(stream);
}

//
ASDCP::Result_t
ASDCP::MPEG2::MXFReader::Close() const
{
  if ( m_Reader && m_Reader->m_File.IsOpen() )
    {
      m_Reader->Close();
      return RESULT_OK;
    }

  return RESULT_INIT;
}

//
ASDCP::Result_t
ASDCP::MPEG2::MXFReader::FrameType(ui32_t FrameNum, FrameType_t& type) const
{
  if ( ! m_Reader )
    return RESULT_INIT;

  return m_Reader->FrameType(FrameNum, type);
}


//------------------------------------------------------------------------------------------

//
class ASDCP::MPEG2::MXFWriter::h__Writer : public ASDCP::h__ASDCPWriter
{
  ASDCP_NO_COPY_CONSTRUCT(h__Writer);
  h__Writer();

public:
  VideoDescriptor m_VDesc;
  ui32_t          m_GOPOffset;
  byte_t          m_EssenceUL[SMPTE_UL_LENGTH];

  h__Writer(const Dictionary& d) : ASDCP::h__ASDCPWriter(d), m_GOPOffset(0) {
    memset(m_EssenceUL, 0, SMPTE_UL_LENGTH);
  }

  virtual ~h__Writer(){}

  Result_t OpenWrite(const std::string&, ui32_t HeaderSize);
  Result_t SetSourceStream(const VideoDescriptor&);
  Result_t WriteFrame(const FrameBuffer&, AESEncContext* = 0, HMACContext* = 0);
  Result_t Finalize();
};


// Open the file for writing. The file must not exist. Returns error if
// the operation cannot be completed.
ASDCP::Result_t
ASDCP::MPEG2::MXFWriter::h__Writer::OpenWrite(const std::string& filename, ui32_t HeaderSize)
{
  if ( ! m_State.Test_BEGIN() )
    return RESULT_STATE;

  Result_t result = m_File.OpenWrite(filename);

  if ( ASDCP_SUCCESS(result) )
    {
      m_HeaderSize = HeaderSize;
      m_EssenceDescriptor = new MPEG2VideoDescriptor(m_Dict);
      result = m_State.Goto_INIT();
    }

  return result;
}

// Automatically sets the MXF file's metadata from the MPEG stream.
ASDCP::Result_t
ASDCP::MPEG2::MXFWriter::h__Writer::SetSourceStream(const VideoDescriptor& VDesc)
{
  assert(m_Dict);
  if ( ! m_State.Test_INIT() )
    return RESULT_STATE;

  m_VDesc = VDesc;
  Result_t result = MPEG2_VDesc_to_MD(m_VDesc, (MPEG2VideoDescriptor*)m_EssenceDescriptor);

  if ( ASDCP_SUCCESS(result) )
    {
      memcpy(m_EssenceUL, m_Dict->ul(MDD_MPEG2Essence), SMPTE_UL_LENGTH);
      m_EssenceUL[SMPTE_UL_LENGTH-1] = 1; // first (and only) essence container
      result = m_State.Goto_READY();
    }

  if ( ASDCP_SUCCESS(result) )
    {
      m_FooterPart.SetDeltaParams(IndexTableSegment::DeltaEntry(-1, 0, 0));

      result = WriteASDCPHeader(MPEG_PACKAGE_LABEL, UL(m_Dict->ul(MDD_MPEG2_VESWrappingFrame)), 
				PICT_DEF_LABEL, UL(m_EssenceUL), UL(m_Dict->ul(MDD_PictureDataDef)),
				m_VDesc.EditRate, derive_timecode_rate_from_edit_rate(m_VDesc.EditRate));
    }

  return result;
}

// Writes a frame of essence to the MXF file. If the optional AESEncContext
// argument is present, the essence is encrypted prior to writing.
// Fails if the file is not open, is finalized, or an operating system
// error occurs.
//
ASDCP::Result_t
ASDCP::MPEG2::MXFWriter::h__Writer::WriteFrame(const FrameBuffer& FrameBuf, AESEncContext* Ctx,
					       HMACContext* HMAC)
{
  Result_t result = RESULT_OK;

  if ( m_State.Test_READY() )
    result = m_State.Goto_RUNNING(); // first time through, get the body location

  IndexTableSegment::IndexEntry Entry;
  Entry.StreamOffset = m_StreamOffset;

  if ( ASDCP_SUCCESS(result) )
    result = WriteEKLVPacket(FrameBuf, m_EssenceUL, Ctx, HMAC);

  if ( ASDCP_FAILURE(result) )
    return result;

  // create mxflib flags
  int Flags = 0;

  switch ( FrameBuf.FrameType() )
    {
    case FRAME_I: Flags = 0x00; break;
    case FRAME_P: Flags = 0x22; break;
    case FRAME_B: Flags = 0x33; break;
    default: break;
    }

  if ( FrameBuf.GOPStart() )
    {
      m_GOPOffset = 0;
      Flags |= 0x40;

      if ( FrameBuf.ClosedGOP() )
	Flags |= 0x80;
    }

  // update the index manager
  Entry.TemporalOffset = - FrameBuf.TemporalOffset();
  Entry.KeyFrameOffset = 0 - m_GOPOffset;
  Entry.Flags = Flags;
  /*
  fprintf(stderr, "to: %4hd   ko: %4hd   c1: %4hd   c2: %4hd   fl: 0x%02x\n",
	  Entry.TemporalOffset, Entry.KeyFrameOffset,
	  m_GOPOffset + Entry.TemporalOffset,
	  Entry.KeyFrameOffset - Entry.TemporalOffset,
	  Entry.Flags);
  */
  m_FooterPart.PushIndexEntry(Entry);
  m_FramesWritten++;
  m_GOPOffset++;

  return RESULT_OK;
}


// Closes the MXF file, writing the index and other closing information.
//
ASDCP::Result_t
ASDCP::MPEG2::MXFWriter::h__Writer::Finalize()
{
  if ( ! m_State.Test_RUNNING() )
    return RESULT_STATE;

  m_State.Goto_FINAL();

  return WriteASDCPFooter();
}


//------------------------------------------------------------------------------------------



ASDCP::MPEG2::MXFWriter::MXFWriter()
{
}

ASDCP::MPEG2::MXFWriter::~MXFWriter()
{
}

// Warning: direct manipulation of MXF structures can interfere
// with the normal operation of the wrapper.  Caveat emptor!
//
ASDCP::MXF::OP1aHeader&
ASDCP::MPEG2::MXFWriter::OP1aHeader()
{
  if ( m_Writer.empty() )
    {
      assert(g_OP1aHeader);
      return *g_OP1aHeader;
    }

  return m_Writer->m_HeaderPart;
}

// Warning: direct manipulation of MXF structures can interfere
// with the normal operation of the wrapper.  Caveat emptor!
//
ASDCP::MXF::OPAtomIndexFooter&
ASDCP::MPEG2::MXFWriter::OPAtomIndexFooter()
{
  if ( m_Writer.empty() )
    {
      assert(g_OPAtomIndexFooter);
      return *g_OPAtomIndexFooter;
    }

  return m_Writer->m_FooterPart;
}

// Warning: direct manipulation of MXF structures can interfere
// with the normal operation of the wrapper.  Caveat emptor!
//
ASDCP::MXF::RIP&
ASDCP::MPEG2::MXFWriter::RIP()
{
  if ( m_Writer.empty() )
    {
      assert(g_RIP);
      return *g_RIP;
    }

  return m_Writer->m_RIP;
}

// Open the file for writing. The file must not exist. Returns error if
// the operation cannot be completed.
ASDCP::Result_t
ASDCP::MPEG2::MXFWriter::OpenWrite(const std::string& filename, const WriterInfo& Info,
				   const VideoDescriptor& VDesc, ui32_t HeaderSize)
{
  if ( Info.LabelSetType == LS_MXF_SMPTE )
    m_Writer = new h__Writer(DefaultSMPTEDict());
  else
    m_Writer = new h__Writer(DefaultInteropDict());

  m_Writer->m_Info = Info;
  
  Result_t result = m_Writer->OpenWrite(filename, HeaderSize);

  if ( ASDCP_SUCCESS(result) )
    result = m_Writer->SetSourceStream(VDesc);

  if ( ASDCP_FAILURE(result) )
    m_Writer.release();

  return result;
}


// Writes a frame of essence to the MXF file. If the optional AESEncContext
// argument is present, the essence is encrypted prior to writing.
// Fails if the file is not open, is finalized, or an operating system
// error occurs.
ASDCP::Result_t
ASDCP::MPEG2::MXFWriter::WriteFrame(const FrameBuffer& FrameBuf, AESEncContext* Ctx, HMACContext* HMAC)
{
  if ( m_Writer.empty() )
    return RESULT_INIT;

  return m_Writer->WriteFrame(FrameBuf, Ctx, HMAC);
}

// Closes the MXF file, writing the index and other closing information.
ASDCP::Result_t
ASDCP::MPEG2::MXFWriter::Finalize()
{
  if ( m_Writer.empty() )
    return RESULT_INIT;

  return m_Writer->Finalize();
}


//
// end AS_DCP_MPEG2.cpp
//
