/*
-Copyright (c) 2007, John Hurst
+Copyright (c) 2007-2009, John Hurst
All rights reserved.
Redistribution and use in source and binary forms, with or without
#include "AS_DCP_internal.h"
-#include "AS_DCP_TimedText.h"
#include "S12MTimecode.h"
#include "KM_xml.h"
using namespace Kumu;
using namespace ASDCP;
+using Kumu::DefaultLogSink;
+
const char* c_dcst_namespace_name = "http://www.smpte-ra.org/schemas/428-7/2007/DCST";
+//------------------------------------------------------------------------------------------
+
+
+
+class FilenameResolver : public ASDCP::TimedText::IResourceResolver
+{
+ std::string m_Dirname;
+
+ FilenameResolver();
+ bool operator==(const FilenameResolver&);
+
+public:
+ FilenameResolver(const std::string& dirname)
+ {
+ if ( PathIsDirectory(dirname) )
+ {
+ m_Dirname = dirname;
+ return;
+ }
+
+ DefaultLogSink().Error("Path '%s' is not a directory, defaulting to '.'\n", dirname.c_str());
+ m_Dirname = ".";
+ }
+
+ //
+ Result_t ResolveRID(const byte_t* uuid, TimedText::FrameBuffer& FrameBuf) const
+ {
+ FileReader Reader;
+ char buf[64];
+ UUID RID(uuid);
+ std::string filename = m_Dirname + "/" + RID.EncodeHex(buf, 64);
+ DefaultLogSink().Debug("retrieving resource %s from file %s\n", buf, filename.c_str());
+
+ Result_t result = Reader.OpenRead(filename.c_str());
+
+ if ( KM_SUCCESS(result) )
+ {
+ ui32_t read_count = 0;
+ result = Reader.Read(FrameBuf.Data(), FrameBuf.Capacity(), &read_count);
+
+ if ( KM_SUCCESS(result) )
+ FrameBuf.Size(read_count);
+ }
+
+ return result;
+ }
+};
//------------------------------------------------------------------------------------------
ASDCP_NO_COPY_CONSTRUCT(h__SubtitleParser);
public:
+ std::string m_Filename;
std::string m_XMLDoc;
TimedTextDescriptor m_TDesc;
+ mem_ptr<FilenameResolver> m_DefaultResolver;
h__SubtitleParser() : m_Root("**ParserRoot**")
{
~h__SubtitleParser() {}
+ TimedText::IResourceResolver* GetDefaultResolver()
+ {
+ if ( m_DefaultResolver.empty() )
+ m_DefaultResolver = new FilenameResolver(PathDirname(m_Filename));
+
+ return m_DefaultResolver;
+ }
+
Result_t OpenRead(const char* filename);
- Result_t ReadAncillaryResource(const byte_t* uuid, FrameBuffer& FrameBuf) const;
+ Result_t ReadAncillaryResource(const byte_t* uuid, FrameBuffer& FrameBuf, const IResourceResolver& Resolver) const;
};
//
return ASDCP::Rational(Num, Den);
}
-//
-ui32_t
-CalculateSubtitleDuration(const XMLElement* begin, const XMLElement* end)
-{
- assert(begin); assert(end);
-
- S12MTimecode
- beginTC(begin->GetAttrWithName("TimeIn"), 24),
- endTC(end->GetAttrWithName("TimeOut"), 24);
-
- if ( endTC < beginTC )
- return 0;
-
- return endTC.GetFrames() - beginTC.GetFrames();
-}
-
//
Result_t
ASDCP::TimedText::DCSubtitleParser::h__SubtitleParser::OpenRead(const char* filename)
{
Result_t result = ReadFileIntoString(filename, m_XMLDoc);
+ if ( KM_FAILURE(result) )
+ return result;
+
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;
m_TDesc.EditRate = decode_rational(EditRate->GetBody().c_str());
+ if ( m_TDesc.EditRate != EditRate_24 && m_TDesc.EditRate != EditRate_48 )
+ {
+ DefaultLogSink(). Error("EditRate must be 24/1 or 48/1\n");
+ return RESULT_FORMAT;
+ }
+
// list of fonts
ElementList FontList;
m_Root.GetChildrenWithName("LoadFont", FontList);
m_ResourceTypes.insert(ResourceTypeMap_t::value_type(UUID(TmpResource.ResourceID), MT_PNG));
}
- // duration
+ // Calculate the timeline duration.
+ // This is a little ugly because the last element in the file is not necessarily
+ // the last instance to be displayed, e.g., element n and element n-1 may have the
+ // same start time but n-1 may have a greater duration making it the last to be seen.
+ // We must scan the list to accumulate the latest TimeOut value.
ElementList InstanceList;
+ ElementList::const_iterator ei;
+ ui32_t end_count = 0;
+
m_Root.GetChildrenWithName("Subtitle", InstanceList);
- m_TDesc.ContainerDuration = CalculateSubtitleDuration(InstanceList.front(), InstanceList.back());
+
+ if ( InstanceList.empty() )
+ {
+ DefaultLogSink(). Error("XML document contains no Subtitle elements.\n");
+ return RESULT_FORMAT;
+ }
+
+ // assumes 24/1 or 48/1 as constrained above
+ assert(m_TDesc.EditRate.Denominator == 1);
+
+ S12MTimecode beginTC;
+ beginTC.SetFPS(m_TDesc.EditRate.Numerator);
+ 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);
+ if ( end_count < tmpTC.GetFrames() )
+ end_count = tmpTC.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;
}
//
Result_t
-ASDCP::TimedText::DCSubtitleParser::h__SubtitleParser::ReadAncillaryResource(const byte_t* uuid, FrameBuffer& FrameBuf) const
+ASDCP::TimedText::DCSubtitleParser::h__SubtitleParser::ReadAncillaryResource(const byte_t* uuid, FrameBuffer& FrameBuf,
+ const IResourceResolver& Resolver) const
{
FrameBuf.AssetID(uuid);
UUID TmpID(uuid);
char buf[64];
- FileReader Reader;
ResourceTypeMap_t::const_iterator rmi = m_ResourceTypes.find(TmpID);
return RESULT_RANGE;
}
- Result_t result = Reader.OpenRead(TmpID.EncodeHex(buf, 64));
+ Result_t result = Resolver.ResolveRID(uuid, FrameBuf);
if ( KM_SUCCESS(result) )
{
- ui32_t read_count = 0;
- result = Reader.Read(FrameBuf.Data(), FrameBuf.Capacity(), &read_count);
-
- if ( KM_SUCCESS(result) )
- {
- FrameBuf.Size(read_count);
-
- if ( (*rmi).second == MT_PNG )
- FrameBuf.MIMEType("image/png");
+ if ( (*rmi).second == MT_PNG )
+ FrameBuf.MIMEType("image/png");
- else if ( (*rmi).second == MT_OPENTYPE )
- FrameBuf.MIMEType("application/x-opentype");
+ else if ( (*rmi).second == MT_OPENTYPE )
+ FrameBuf.MIMEType("application/x-font-opentype");
- else
- FrameBuf.MIMEType("application/octet-stream");
- }
- }
- else
- {
- DefaultLogSink(). Error("Error opening resource file %s.\n", buf);
+ else
+ FrameBuf.MIMEType("application/octet-stream");
}
return result;
//
ASDCP::Result_t
-ASDCP::TimedText::DCSubtitleParser::ReadAncillaryResource(const byte_t* uuid, FrameBuffer& FrameBuf) const
+ASDCP::TimedText::DCSubtitleParser::ReadAncillaryResource(const byte_t* uuid, FrameBuffer& FrameBuf,
+ const IResourceResolver* Resolver) const
{
- if ( m_Parser.empty() )
+ if ( m_Parser.empty() )
return RESULT_INIT;
- return m_Parser->ReadAncillaryResource(uuid, FrameBuf);
+ if ( Resolver == 0 )
+ Resolver = m_Parser->GetDefaultResolver();
+
+ return m_Parser->ReadAncillaryResource(uuid, FrameBuf, *Resolver);
}
projects / asdcplib.git / blobdiff