--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/OrthancFramework/Sources/DicomParsing/IDicomTranscoder.h	Wed Jun 10 20:30:34 2020 +0200
@@ -0,0 +1,130 @@
+/**
+ * Orthanc - A Lightweight, RESTful DICOM Store
+ * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
+ * Department, University Hospital of Liege, Belgium
+ * Copyright (C) 2017-2020 Osimis S.A., Belgium
+ *
+ * This program is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * In addition, as a special exception, the copyright holders of this
+ * program give permission to link the code of its release with the
+ * OpenSSL project's "OpenSSL" library (or with modified versions of it
+ * that use the same license as the "OpenSSL" library), and distribute
+ * the linked executables. You must obey the GNU General Public License
+ * in all respects for all of the code used other than "OpenSSL". If you
+ * modify file(s) with this exception, you may extend this exception to
+ * your version of the file(s), but you are not obligated to do so. If
+ * you do not wish to do so, delete this exception statement from your
+ * version. If you delete this exception statement from all source files
+ * in the program, then also delete it here.
+ * 
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ **/
+
+
+#pragma once
+
+#include "../Compatibility.h"
+#include "../Enumerations.h"
+
+#include <boost/noncopyable.hpp>
+#include <set>
+
+class DcmFileFormat;
+
+namespace Orthanc
+{
+  class ParsedDicomFile;
+  
+  /**
+   * WARNING: This class might be called from several threads at
+   * once. Make sure to implement proper locking.
+   **/
+  class ORTHANC_PUBLIC IDicomTranscoder : public boost::noncopyable
+  {
+  public:
+    class DicomImage : public boost::noncopyable
+    {
+    private:
+      std::unique_ptr<DcmFileFormat>  parsed_;
+      std::unique_ptr<std::string>    buffer_;
+      bool                            isExternalBuffer_;
+      const void*                     externalBuffer_;
+      size_t                          externalSize_;
+
+      void Parse();
+
+      void Serialize();
+
+      DcmFileFormat* ReleaseParsed();
+
+    public:
+      DicomImage();
+      
+      void Clear();
+      
+      // Calling this method will invalidate the "ParsedDicomFile" object
+      void AcquireParsed(ParsedDicomFile& parsed);
+      
+      void AcquireParsed(DcmFileFormat* parsed);
+
+      void AcquireParsed(DicomImage& other);
+
+      void AcquireBuffer(std::string& buffer /* will be swapped */);
+
+      void AcquireBuffer(DicomImage& other);
+
+      void SetExternalBuffer(const void* buffer,
+                             size_t size);
+
+      void SetExternalBuffer(const std::string& buffer);
+
+      DcmFileFormat& GetParsed();
+
+      ParsedDicomFile* ReleaseAsParsedDicomFile();
+
+      const void* GetBufferData();
+
+      size_t GetBufferSize();
+    };
+
+
+  protected:
+    enum TranscodingType
+    {
+      TranscodingType_Lossy,
+      TranscodingType_Lossless,
+      TranscodingType_Unknown
+    };
+
+    static TranscodingType GetTranscodingType(DicomTransferSyntax target,
+                                              DicomTransferSyntax source);
+
+    static void CheckTranscoding(DicomImage& transcoded,
+                                 DicomTransferSyntax sourceSyntax,
+                                 const std::string& sourceSopInstanceUid,
+                                 const std::set<DicomTransferSyntax>& allowedSyntaxes,
+                                 bool allowNewSopInstanceUid);
+    
+  public:    
+    virtual ~IDicomTranscoder()
+    {
+    }
+
+    virtual bool Transcode(DicomImage& target,
+                           DicomImage& source /* in, "GetParsed()" possibly modified */,
+                           const std::set<DicomTransferSyntax>& allowedSyntaxes,
+                           bool allowNewSopInstanceUid) = 0;
+
+    static std::string GetSopInstanceUid(DcmFileFormat& dicom);
+  };
+}