From f4061a21fffad4fdf8dbb2f193f0f0960b25421c Mon Sep 17 00:00:00 2001
From: jhurst <jhurst@cinecert.com>
Date: Mon, 6 Aug 2018 22:07:03 +0000
Subject: o Added support for SMPTE RDD 47 "ISXD Track File" o Added generic
 support for SMPTE RP 2057 "Text-Based Metadata Carriage in MXF" o Re-factored
 AS-02 frame-wrap index write to use a common implementation o Re-factored
 support for SMPTE ST 410 to use a common implementation (affects o   AS-DCP
 and AS-02 timed-text MXF (SMPTE 429-5) o Patched several ambiguous integer
 casts. o Added new essence type identifiers ESS_AS02_ISXD and ESS_AS02_ACES o
 Fixed a bug wherein the Generic Container data tarck clip was instead being o
   written as a DM track o Fixed UL values DCDataDescriptor and
 ContainerConstraintSubDescriptor to have o   a byte 6 value of 0x53 (Tag Set)
 instead of 0x07 (coding sentinel) o Added UL values 492 - 511 to the
 dictionary o Added ApplicationSchemes and ConformsToSpecifications to the
 Preface set o Added default initializer to MXF::LineMapPair o Added sets
 DescriptiveFramework, DescriptiveObject, TextBasedDMFramework, o  
 TextBasedObject, GenericStreamTextBasedSet and ISXDDataEssenceDescriptor o
 Added ISXD support and options '-G', '-u' to as-02-wrap o Added ISXD support
 and option '-g' to as-02-unwrap

---
 src/AS_DCP_TimedText.cpp | 67 ++++++++----------------------------------------
 1 file changed, 10 insertions(+), 57 deletions(-)

(limited to 'src/AS_DCP_TimedText.cpp')

diff --git a/src/AS_DCP_TimedText.cpp b/src/AS_DCP_TimedText.cpp
index 6e34a5d..1f0930a 100644
--- a/src/AS_DCP_TimedText.cpp
+++ b/src/AS_DCP_TimedText.cpp
@@ -1,5 +1,5 @@
 /*
-Copyright (c) 2008-2016, John Hurst
+Copyright (c) 2008-2018, John Hurst
 All rights reserved.
 
 Redistribution and use in source and binary forms, with or without
@@ -244,7 +244,7 @@ ASDCP::TimedText::MXFReader::h__Reader::ReadTimedTextResource(FrameBuffer& Frame
 
 //
 ASDCP::Result_t
-ASDCP::TimedText::MXFReader::h__Reader::ReadAncillaryResource(const byte_t* uuid, FrameBuffer& FrameBuf,
+ASDCP::TimedText::MXFReader::h__Reader::ReadAncillaryResource(const byte_t* uuid, FrameBuffer& frame_buf,
 							      AESDecContext* Ctx, HMACContext* HMAC)
 {
   KM_TEST_NULL_L(uuid);
@@ -258,68 +258,21 @@ ASDCP::TimedText::MXFReader::h__Reader::ReadAncillaryResource(const byte_t* uuid
       return RESULT_RANGE;
     }
 
-  TimedTextResourceSubDescriptor* DescObject = 0;
   // get the subdescriptor
   InterchangeObject* tmp_iobj = 0;
   Result_t result = m_HeaderPart.GetMDObjectByID((*ri).second, &tmp_iobj);
-  DescObject = static_cast<TimedTextResourceSubDescriptor*>(tmp_iobj);
+  TimedTextResourceSubDescriptor* desc_object = dynamic_cast<TimedTextResourceSubDescriptor*>(tmp_iobj);
 
   if ( KM_SUCCESS(result) )
     {
-      RIP::const_pair_iterator pi;
-      RIP::PartitionPair TmpPair;
-      ui32_t sequence = 0;
-
-      // Look up the partition start in the RIP using the SID.
-      // Count the sequence length in because this is the sequence
-      // value needed to  complete the HMAC.
-      for ( pi = m_RIP.PairArray.begin(); pi != m_RIP.PairArray.end(); ++pi, ++sequence )
-	{
-	  if ( (*pi).BodySID == DescObject->EssenceStreamID )
-	    {
-	      TmpPair = *pi;
-	      break;
-	    }
-	}
-
-      if ( TmpPair.ByteOffset == 0 )
-	{
-	  DefaultLogSink().Error("Body SID not found in RIP set: %d\n", DescObject->EssenceStreamID);
-	  return RESULT_FORMAT;
-	}
+      assert(desc_object);
+      result = ReadGenericStreamPartitionPayload(desc_object->EssenceStreamID, frame_buf);
+    }
 
-      if ( KM_SUCCESS(result) )
-	{
-	  FrameBuf.AssetID(uuid);
-	  FrameBuf.MIMEType(DescObject->MIMEMediaType);
-
-	  // seek tp the start of the partition
-	  if ( (Kumu::fpos_t)TmpPair.ByteOffset != m_LastPosition )
-	    {
-	      m_LastPosition = TmpPair.ByteOffset;
-	      result = m_File.Seek(TmpPair.ByteOffset);
-	    }
-
-	  // read the partition header
-	  MXF::Partition GSPart(m_Dict);
-	  result = GSPart.InitFromFile(m_File);
-
-	  if( ASDCP_SUCCESS(result) )
-	    {
-	      // check the SID
-	      if ( DescObject->EssenceStreamID != GSPart.BodySID )
-		{
-		  char buf[64];
-		  DefaultLogSink().Error("Generic stream partition body differs: %s\n", RID.EncodeHex(buf, 64));
-		  return RESULT_FORMAT;
-		}
-
-	      // read the essence packet
-	      assert(m_Dict);
-	      if( ASDCP_SUCCESS(result) )
-		result = ReadEKLVPacket(0, sequence, FrameBuf, m_Dict->ul(MDD_GenericStream_DataElement), Ctx, HMAC);
-	    }
-	}
+  if ( KM_SUCCESS(result) )
+    {
+      frame_buf.AssetID(uuid);
+      frame_buf.MIMEType(desc_object->MIMEMediaType);
     }
 
   return result;
-- 
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