From 8095eaa320551b6795d0368c0ad0c227a3167caa Mon Sep 17 00:00:00 2001
From: jhurst <jhurst@cinecert.com>
Date: Tue, 20 Dec 2005 01:55:40 +0000
Subject: wheee!

---
 src/h__Writer.cpp | 458 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 458 insertions(+)
 create mode 100755 src/h__Writer.cpp

(limited to 'src/h__Writer.cpp')

diff --git a/src/h__Writer.cpp b/src/h__Writer.cpp
new file mode 100755
index 0000000..411f63e
--- /dev/null
+++ b/src/h__Writer.cpp
@@ -0,0 +1,458 @@
+/*
+Copyright (c) 2004-2005, John Hurst
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions
+are met:
+1. Redistributions of source code must retain the above copyright
+   notice, this list of conditions and the following disclaimer.
+2. 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.
+3. The name of the author may not be used to endorse or promote products
+   derived from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
+*/
+/*! \file    h__Writer.cpp
+    \version $Id$
+    \brief   MXF file writer base class
+*/
+
+#include "AS_DCP_internal.h"
+#include "MemIO.h"
+#include "Timecode.h"
+#include <assert.h>
+
+using namespace mxflib;
+using namespace ASDCP;
+
+
+ASDCP::h__Writer::h__Writer() : m_FramesWritten(0), m_StreamOffset(0)
+{
+  init_mxf_types();
+}
+
+ASDCP::h__Writer::~h__Writer()
+{
+}
+
+// standard method of writing the header of a new MXF file
+Result_t
+ASDCP::h__Writer::WriteMXFHeader(EssenceType_t EssenceType, ASDCP::Rational& EditRate,
+			  ui32_t TCFrameRate, ui32_t BytesPerEditUnit)
+{
+  // write the stream metadata
+  m_Metadata = new Metadata();
+  assert(m_Metadata);
+  assert(m_Metadata->m_Object);
+
+  if ( m_Info.EncryptedEssence )
+    {
+      UL DMSUL(CryptoFrameworkUL_Data);
+      m_Metadata->AddDMScheme(DMSUL);
+    }
+
+  // Set the OP label
+  // If we are writing OP-Atom we write the header as OP1a initially as another process
+  // may try to read the file before it is complete and then it will NOT be a valid OP-Atom file
+  m_Metadata->SetOP(OP1aUL);
+
+  // Build the Material Package
+  // DRAGONS: We should really try and determine the UMID type rather than cop-out!
+  UMID PackageUMID;
+  PackageUMID.MakeUMID(0x0d); // mixed type
+
+#if ASDCP_USE_MXFLIB
+  mxflib::Rational EditRate_;
+  EditRate_.Numerator = EditRate.Numerator;
+  EditRate_.Denominator = EditRate.Denominator;
+#else
+#define EditRate_ EditRate
+#endif
+
+  m_MaterialPackage = m_Metadata->AddMaterialPackage("AS-DCP Material Package", PackageUMID);
+  m_Metadata->SetPrimaryPackage(m_MaterialPackage);	// This will be overwritten for OP-Atom
+  
+  TrackPtr MPTimecodeTrack = m_MaterialPackage->AddTimecodeTrack(EditRate_);
+  m_MPTimecode = MPTimecodeTrack->AddTimecodeComponent(TCFrameRate, 0, 0);
+
+  TrackPtr FPTimecodeTrack = 0;
+  mxflib::UUID assetUUID(m_Info.AssetUUID);
+
+  UMID EssenceUMID;
+  
+  switch ( EssenceType )
+    {
+    case ESS_MPEG2_VES:
+      PackageUMID.MakeUMID(0x0f, assetUUID);
+      m_FilePackage = m_Metadata->AddFilePackage(1, MPEG_PACKAGE_LABEL, PackageUMID);
+      m_MPTrack = m_MaterialPackage->AddPictureTrack(EditRate_);
+      m_FPTrack = m_FilePackage->AddPictureTrack(0, EditRate_);
+      break;
+	  
+    case ESS_JPEG_2000:
+      PackageUMID.MakeUMID(0x0f, assetUUID);
+      m_FilePackage = m_Metadata->AddFilePackage(1, JP2K_PACKAGE_LABEL, PackageUMID);
+      m_MPTrack = m_MaterialPackage->AddPictureTrack(EditRate_);
+      m_FPTrack = m_FilePackage->AddPictureTrack(0, EditRate_);
+      break;
+	  
+    case ESS_PCM_24b_48k:
+      PackageUMID.MakeUMID(0x0f, assetUUID);
+      m_FilePackage = m_Metadata->AddFilePackage(1, PCM_PACKAGE_LABEL, PackageUMID);
+      m_MPTrack = m_MaterialPackage->AddSoundTrack(EditRate_);
+      m_FPTrack = m_FilePackage->AddSoundTrack(0, EditRate_);
+      break;
+
+    default: return RESULT_RAW_ESS;
+    }
+
+  // Add an essence element
+  FPTimecodeTrack = m_FilePackage->AddTimecodeTrack(EditRate_);
+  m_FPTimecode = FPTimecodeTrack->AddTimecodeComponent(TCFrameRate, 0/* NDF */,
+						       tc_to_frames(TCFrameRate, 1, 0, 0, 0) );
+  
+  // Add a single Component to this Track of the Material Package
+  m_MPClip = m_MPTrack->AddSourceClip();
+  
+  // Add a single Component to this Track of the File Package
+  m_FPClip = m_FPTrack->AddSourceClip();
+  const byte_t* SourceEssenceContainerLabel = 0;
+
+  // Frame wrapping
+  if ( m_Info.EncryptedEssence )
+    {
+      switch ( EssenceType )
+	{
+	case ESS_MPEG2_VES:
+	  SourceEssenceContainerLabel = WrappingUL_Data_MPEG2_VES;
+          break;
+	  
+	case ESS_JPEG_2000:
+	  SourceEssenceContainerLabel = WrappingUL_Data_JPEG_2000;
+          break;
+	    
+	case ESS_PCM_24b_48k:
+	  SourceEssenceContainerLabel = WrappingUL_Data_PCM_24b_48k;
+          break;
+	  
+	default:
+	  return RESULT_RAW_ESS;
+	}
+    }
+
+  mem_ptr<UL> WrappingUL;
+  switch ( EssenceType )
+    {
+    case ESS_MPEG2_VES:
+      WrappingUL = new UL(WrappingUL_Data_MPEG2_VES); // memchk TESTED
+      break;
+        
+    case ESS_JPEG_2000:
+      WrappingUL = new UL(WrappingUL_Data_JPEG_2000); // memchk TESTED
+      break;
+        
+    case ESS_PCM_24b_48k:
+      WrappingUL = new UL(WrappingUL_Data_PCM_24b_48k); // memchk TESTED
+      break;
+      
+    default:
+      return RESULT_RAW_ESS;
+    }
+  assert(!WrappingUL.empty());
+  m_EssenceDescriptor->SetValue("EssenceContainer", DataChunk(klv_key_size, WrappingUL->GetValue()));
+  
+  // Write a File Descriptor only on the internally ref'ed Track 
+  m_EssenceDescriptor->SetUint("LinkedTrackID", m_FPTrack->GetUint("TrackID"));
+  m_FilePackage->AddChild("Descriptor")->MakeLink(*m_EssenceDescriptor);
+
+  UL CryptEssenceUL(WrappingUL_Data_Crypt);
+
+  if ( m_Info.EncryptedEssence )
+    {
+      m_Metadata->AddEssenceType(CryptEssenceUL);
+    }
+  else
+    {
+      UL GCUL(GCMulti_Data);
+      m_Metadata->AddEssenceType(GCUL);
+      m_Metadata->AddEssenceType(*WrappingUL);
+    }
+
+  // Link the MP to the FP
+  m_MPClip->MakeLink(m_FPTrack, 0);
+
+  //
+  // ** Write out the header **
+  //
+
+  m_HeaderPart = new Partition("OpenHeader");
+  assert(m_HeaderPart);
+  m_HeaderPart->SetKAG(1);			// Everything else can stay at default
+  m_HeaderPart->SetUint("BodySID", 1);
+  
+  m_HeaderPart->AddMetadata(m_Metadata);
+
+  // Build an Ident set describing us and link into the metadata
+  MDObject* Ident = new MDObject("Identification");
+  assert(Ident);
+  Ident->SetString("CompanyName", m_Info.CompanyName);
+  Ident->SetString("ProductName", m_Info.ProductName);
+  Ident->SetString("VersionString", m_Info.ProductVersion);
+  UUID ProductUID(m_Info.ProductUUID);
+  Ident->SetValue("ProductUID", DataChunk(UUIDlen, ProductUID.GetValue()));
+
+  // TODO: get Oliver to show me how this works
+  //      Ident->SetString("ToolkitVersion", ?);
+
+  m_Metadata->UpdateGenerations(*Ident);
+
+  if ( m_Info.EncryptedEssence )
+    AddDMScrypt(m_FilePackage, m_Info, SourceEssenceContainerLabel);
+
+  // Write the header partition
+  m_File->WritePartition(*m_HeaderPart, HeaderPadding);
+      
+  // set up the index
+  switch ( EssenceType )
+    {
+    case ESS_MPEG2_VES:
+    case ESS_JPEG_2000:
+      m_IndexMan = new IndexManager(0, 0);
+      m_IndexMan->SetPosTableIndex(0, -1);
+      break;
+
+    case ESS_PCM_24b_48k:
+      m_IndexMan = new IndexManager(0, BytesPerEditUnit);
+      break;
+
+    case ESS_UNKNOWN:
+      return RESULT_INIT;
+    }
+
+  m_IndexMan->SetBodySID(1);
+  m_IndexMan->SetIndexSID(129);
+  m_IndexMan->SetEditRate(EditRate_);
+
+  return RESULT_OK;
+}
+
+// standard method of writing a plaintext or encrypted frame
+Result_t
+ASDCP::h__Writer::WriteEKLVPacket(const ASDCP::FrameBuffer& FrameBuf, const byte_t* EssenceUL,
+				  AESEncContext* Ctx, HMACContext* HMAC)
+{
+  Result_t result;
+  IntegrityPack IntPack;
+
+  byte_t overhead[128];
+  MemIOWriter Overhead(overhead, 128);
+
+  if ( FrameBuf.Size() == 0 )
+    {
+      DefaultLogSink().Error("Cannot write empty frame buffer\n");
+      return RESULT_EMPTY_FB;
+    }
+
+  if ( m_Info.EncryptedEssence )
+    {
+      if ( ! Ctx )
+	return RESULT_CRYPT_CTX;
+
+      if ( m_Info.UsesHMAC && ! HMAC )
+	return RESULT_HMAC_CTX;
+
+      if ( FrameBuf.PlaintextOffset() > FrameBuf.Size() )
+	return RESULT_LARGE_PTO;
+
+      // encrypt the essence data (create encrypted source value)
+      result = EncryptFrameBuffer(FrameBuf, m_CtFrameBuf, Ctx);
+
+      // create HMAC
+      if ( ASDCP_SUCCESS(result) && m_Info.UsesHMAC )
+      	result = IntPack.CalcValues(m_CtFrameBuf, m_Info.AssetUUID, m_FramesWritten + 1, HMAC);
+
+      if ( ASDCP_SUCCESS(result) )
+	{ // write UL
+	  Overhead.WriteRaw((byte_t*)CryptEssenceUL_Data, klv_key_size);
+
+	  // construct encrypted triplet header
+	  ui32_t ETLength = klv_cryptinfo_size + m_CtFrameBuf.Size();
+
+	  if ( m_Info.UsesHMAC )
+	    ETLength += klv_intpack_size;
+	  else
+	    ETLength += (klv_length_size * 3); // for empty intpack
+
+	  Overhead.WriteBER(ETLength, klv_length_size);                  // write encrypted triplet length
+	  Overhead.WriteBER(UUIDlen, klv_length_size);                   // write ContextID length
+	  Overhead.WriteRaw(m_Info.ContextID, UUIDlen);                  // write ContextID
+	  Overhead.WriteBER(sizeof(ui64_t), klv_length_size);            // write PlaintextOffset length
+	  Overhead.WriteUi64BE(FrameBuf.PlaintextOffset());              // write PlaintextOffset
+	  Overhead.WriteBER(klv_key_size, klv_length_size);              // write essence UL length
+	  Overhead.WriteRaw((byte_t*)EssenceUL, klv_key_size);           // write the essence UL
+	  Overhead.WriteBER(sizeof(ui64_t), klv_length_size);            // write SourceLength length
+	  Overhead.WriteUi64BE(FrameBuf.Size());                         // write SourceLength
+	  Overhead.WriteBER(m_CtFrameBuf.Size(), klv_length_size);       // write ESV length
+
+	  result = m_File->Writev(Overhead.Data(), Overhead.Size());
+	}
+
+      if ( ASDCP_SUCCESS(result) )
+	{
+	  m_StreamOffset += Overhead.Size();
+	  // write encrypted source value
+	  result = m_File->Writev((byte_t*)m_CtFrameBuf.RoData(), m_CtFrameBuf.Size());
+	}
+
+      if ( ASDCP_SUCCESS(result) )
+	{
+	  m_StreamOffset += m_CtFrameBuf.Size();
+
+	  byte_t hmoverhead[512];
+	  MemIOWriter HMACOverhead(hmoverhead, 512);
+
+	  // write the HMAC
+	  if ( m_Info.UsesHMAC )
+	    {
+	      HMACOverhead.WriteRaw(IntPack.Data, klv_intpack_size);
+	    }
+	  else
+	    { // we still need the var-pack length values if the intpack is empty
+	      for ( ui32_t i = 0; i < 3 ; i++ )
+		HMACOverhead.WriteBER(0, klv_length_size);
+	    }
+
+	  // write HMAC
+	  result = m_File->Writev(HMACOverhead.Data(), HMACOverhead.Size());
+	  m_StreamOffset += HMACOverhead.Size();
+	}
+    }
+  else
+    {
+      Overhead.WriteRaw((byte_t*)EssenceUL, klv_key_size);
+      Overhead.WriteBER(FrameBuf.Size(), klv_length_size);
+      result = m_File->Writev(Overhead.Data(), Overhead.Size());
+ 
+      if ( ASDCP_SUCCESS(result) )
+	result = m_File->Writev((byte_t*)FrameBuf.RoData(), FrameBuf.Size());
+
+      if ( ASDCP_SUCCESS(result) )
+	m_StreamOffset += Overhead.Size() + FrameBuf.Size();
+    }
+
+  if ( ASDCP_SUCCESS(result) )
+    result = m_File->Writev();
+
+  return result;
+}
+
+
+// standard method of writing the header and footer of a completed MXF file
+//
+Result_t
+ASDCP::h__Writer::WriteMXFFooter(EssenceType_t EssenceType)
+{
+  // write the index
+  DataChunk IndexChunk;
+  ui32_t IndexSID = 0;
+
+  // Find all essence container data sets so we can update "IndexSID"
+  MDObjectListPtr ECDataSets = 0;
+  MDObject* Ptr = (*m_Metadata)["ContentStorage"];
+  if ( Ptr )
+    Ptr = Ptr->GetLink();
+  if ( Ptr )
+    Ptr = (*Ptr)["EssenceContainerData"];
+  if ( Ptr )
+    ECDataSets = Ptr->ChildList("EssenceContainer");
+
+  // ** Handle full index tables next **
+  // ***********************************
+      
+  // Make an index table containing all available entries
+  IndexTablePtr Index = m_IndexMan->MakeIndex();
+  m_IndexMan->AddEntriesToIndex(Index);
+      
+  // Write the index table
+  Index->WriteIndex(IndexChunk);
+				
+  // Record the IndexSID for when the index is written
+  IndexSID = Index->IndexSID;
+
+  // Update IndexSID in essence container data set
+  MDObjectList::iterator ECD_it = ECDataSets->begin();
+  while(ECD_it != ECDataSets->end())
+    {
+      if((*ECD_it)->GetLink())
+	{
+	  if((*ECD_it)->GetLink()->GetUint("BodySID") == m_IndexMan->GetBodySID())
+	    {
+	      (*ECD_it)->GetLink()->SetUint("IndexSID", m_IndexMan->GetIndexSID());
+	      break;
+	    }
+	}
+
+      ECD_it++;
+    }
+
+  // If we are writing OP-Atom this is the first place we can claim it
+  m_Metadata->SetOP(OPAtomUL);
+  
+  // Set top-level file package correctly for OP-Atom
+  m_Metadata->SetPrimaryPackage(m_FilePackage);
+  
+  m_Metadata->SetTime();
+  m_MPTimecode->SetDuration(m_FramesWritten);
+
+  m_MPClip->SetDuration(m_FramesWritten);
+  m_FPTimecode->SetDuration(m_FramesWritten);
+  m_FPClip->SetDuration(m_FramesWritten);
+  m_EssenceDescriptor->SetInt64("ContainerDuration", m_FramesWritten);
+
+  // Turn the header or body partition into a footer
+  m_HeaderPart->ChangeType("CompleteFooter");
+  m_HeaderPart->SetUint("IndexSID",  IndexSID);
+
+  // Make sure any new sets are linked in
+  m_HeaderPart->UpdateMetadata(m_Metadata);
+
+  // Actually write the footer
+  m_File->WritePartitionWithIndex(*m_HeaderPart, &IndexChunk, false);
+
+  // Add a RIP
+  m_File->WriteRIP();
+
+  //
+  // ** Update the header ** 
+  //
+  // For generalized OPs update the value of "FooterPartition" in the header pack
+  // For OP-Atom re-write the entire header
+  //
+  ASDCP::fpos_t FooterPos = m_HeaderPart->GetUint64("FooterPartition");
+  m_File->Seek(0);
+
+  m_HeaderPart->ChangeType("ClosedCompleteHeader");
+  m_HeaderPart->SetUint64("FooterPartition", FooterPos);
+  m_HeaderPart->SetUint64("BodySID", 1);
+
+  m_File->ReWritePartition(*m_HeaderPart);
+  m_File->Close();
+  
+  return RESULT_OK;
+}
+
+//
+// end h__Writer.cpp
+//
-- 
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