IMF MCA labels

[asdcplib.git] / src / TimedText_Parser.cpp

diff --git a/src/TimedText_Parser.cpp b/src/TimedText_Parser.cpp
index 099e9077c01833f818ad2facc3d7109ffede854d..191a3535d5198d66e1f14b8931c1eee8cc74ea44 100644 (file)
--- a/src/TimedText_Parser.cpp
+++ b/src/TimedText_Parser.cpp
@@ -1,5 +1,5 @@
 /*
-Copyright (c) 2007-2008, John Hurst
+Copyright (c) 2007-2009, John Hurst
 All rights reserved.
 
 Redistribution and use in source and binary forms, with or without
@@ -78,8 +78,12 @@ public:
 
     if ( KM_SUCCESS(result) )
       {
-       ui32_t read_count = 0;
-       result = Reader.Read(FrameBuf.Data(), FrameBuf.Capacity(), &read_count);
+       ui32_t read_count, read_size = Reader.Size();
+
+       result = FrameBuf.Capacity(read_size);
+
+       if ( KM_SUCCESS(result) )
+         result = Reader.Read(FrameBuf.Data(), read_size, &read_count);
 
        if ( KM_SUCCESS(result) )
          FrameBuf.Size(read_count);
@@ -97,6 +101,7 @@ class ASDCP::TimedText::DCSubtitleParser::h__SubtitleParser
 {
   XMLElement  m_Root;
   ResourceTypeMap_t m_ResourceTypes;
+  Result_t OpenRead();
 
   ASDCP_NO_COPY_CONSTRUCT(h__SubtitleParser);
 
@@ -122,6 +127,7 @@ public:
   }
 
   Result_t OpenRead(const char* filename);
+  Result_t OpenRead(const std::string& xml_doc, const char* filename);
   Result_t ReadAncillaryResource(const byte_t* uuid, FrameBuffer& FrameBuf, const IResourceResolver& Resolver) const;
 };
 
@@ -166,13 +172,34 @@ ASDCP::TimedText::DCSubtitleParser::h__SubtitleParser::OpenRead(const char* file
 {
   Result_t result = ReadFileIntoString(filename, m_XMLDoc);
 
-  if ( KM_FAILURE(result) )
-    return result;
+  if ( KM_SUCCESS(result) )
+    result = OpenRead();
+
+  m_Filename = filename;
+  return result;
+}
+
+//
+Result_t
+ASDCP::TimedText::DCSubtitleParser::h__SubtitleParser::OpenRead(const std::string& xml_doc, const char* filename)
+{
+  m_XMLDoc = xml_doc;
+
+  if ( filename != 0 )
+    m_Filename = filename;
+  else
+    m_Filename = "<string>";
 
+  return OpenRead();
+}
+
+//
+Result_t
+ASDCP::TimedText::DCSubtitleParser::h__SubtitleParser::OpenRead()
+{
   if ( ! m_Root.ParseString(m_XMLDoc.c_str()) )
     return RESULT_FORMAT;
 
-  m_Filename = filename;
   m_TDesc.EncodingName = "UTF-8"; // the XML parser demands UTF-8
   m_TDesc.ResourceList.clear();
   m_TDesc.ContainerDuration = 0;
@@ -184,7 +211,9 @@ ASDCP::TimedText::DCSubtitleParser::h__SubtitleParser::OpenRead(const char* file
       m_TDesc.NamespaceName = c_dcst_namespace_name;
     }
   else
-    m_TDesc.NamespaceName = ns->Name();
+    {
+      m_TDesc.NamespaceName = ns->Name();
+    }
 
   UUID DocID;
   if ( ! get_UUID_from_child_element("Id", &m_Root, DocID) )
@@ -204,9 +233,16 @@ ASDCP::TimedText::DCSubtitleParser::h__SubtitleParser::OpenRead(const char* file
 
   m_TDesc.EditRate = decode_rational(EditRate->GetBody().c_str());
 
-  if ( m_TDesc.EditRate != EditRate_24 && m_TDesc.EditRate != EditRate_48 )
+  if ( m_TDesc.EditRate != EditRate_23_98
+       && m_TDesc.EditRate != EditRate_24
+       && m_TDesc.EditRate != EditRate_25
+       && m_TDesc.EditRate != EditRate_30
+       && m_TDesc.EditRate != EditRate_48
+       && m_TDesc.EditRate != EditRate_50
+       && m_TDesc.EditRate != EditRate_60 )
     {
-      DefaultLogSink(). Error("EditRate must be 24/1 or 48/1\n");
+      DefaultLogSink(). Error("Unexpected EditRate: %d/%d\n",
+                             m_TDesc.EditRate.Numerator, m_TDesc.EditRate.Denominator);
       return RESULT_FORMAT;
     }
 
@@ -263,21 +299,33 @@ ASDCP::TimedText::DCSubtitleParser::h__SubtitleParser::OpenRead(const char* file
 
   if ( InstanceList.empty() )
     {
-      DefaultLogSink(). Error("XML document contains no Subtitle elements!\n");
+      DefaultLogSink(). Error("XML document contains no Subtitle elements.\n");
       return RESULT_FORMAT;
     }
 
-  // assumes 24/1 or 48/1 as constrained above
-  S12MTimecode beginTC(InstanceList.front()->GetAttrWithName("TimeIn"), m_TDesc.EditRate.Numerator);
+  // assumes edit rate is constrained above
+  ui32_t TCFrameRate = ( m_TDesc.EditRate == EditRate_23_98  ) ? 24 : m_TDesc.EditRate.Numerator;
+
+  S12MTimecode beginTC;
+  beginTC.SetFPS(TCFrameRate);
+  XMLElement* StartTime = m_Root.GetChildWithName("StartTime");
+
+  if ( StartTime != 0 )
+    beginTC.DecodeString(StartTime->GetBody());
 
   for ( ei = InstanceList.begin(); ei != InstanceList.end(); ei++ )
     {
-      S12MTimecode tmpTC((*ei)->GetAttrWithName("TimeOut"), m_TDesc.EditRate.Numerator);
+      S12MTimecode tmpTC((*ei)->GetAttrWithName("TimeOut"), TCFrameRate);
       if ( end_count < tmpTC.GetFrames() )
        end_count = tmpTC.GetFrames();
     }
 
-  assert( end_count > beginTC.GetFrames() );
+  if ( end_count <= beginTC.GetFrames() )
+    {
+      DefaultLogSink(). Error("Timed Text file has zero-length timeline.\n");
+      return RESULT_FORMAT;
+    }
+
   m_TDesc.ContainerDuration = end_count - beginTC.GetFrames();
 
   return RESULT_OK;
@@ -343,9 +391,23 @@ ASDCP::TimedText::DCSubtitleParser::OpenRead(const char* filename) const
   return result;
 }
 
+// Parses an XML document to provide a complete set of stream metadata for the MXFWriter below.
+Result_t
+ASDCP::TimedText::DCSubtitleParser::OpenRead(const std::string& xml_doc, const char* filename) const
+{
+  const_cast<ASDCP::TimedText::DCSubtitleParser*>(this)->m_Parser = new h__SubtitleParser;
+
+  Result_t result = m_Parser->OpenRead(xml_doc, filename);
+
+  if ( ASDCP_FAILURE(result) )
+    const_cast<ASDCP::TimedText::DCSubtitleParser*>(this)->m_Parser = 0;
+
+  return result;
+}
+
 //
 ASDCP::Result_t
-ASDCP::TimedText::DCSubtitleParser::FillDescriptor(TimedTextDescriptor& TDesc) const
+ASDCP::TimedText::DCSubtitleParser::FillTimedTextDescriptor(TimedTextDescriptor& TDesc) const
 {
   if ( m_Parser.empty() )
     return RESULT_INIT;