Make Prev/Next Segment UID classes standalone

They are not KaxSegmentUID as they don't have the same ID.
If we need a special class for Segment UIDs (including chapter ones) we
should use a proper class/interface.

Eventually this should be moved into KaxSemantic like KaxSegmentUID.

matroska/KaxInfoData.h

@@ -25,23 +25,15 @@ using namespace libebml;
 namespace libmatroska {
 
 DECLARE_MKX_CONTEXT(KaxPrevUID)
-class MATROSKA_DLL_API KaxPrevUID : public KaxSegmentUID {
+DECLARE_MKX_BINARY (KaxPrevUID)
   public:
-    KaxPrevUID() = default;
-    KaxPrevUID(const KaxPrevUID & ElementToClone) = default;
     bool ValidateSize() const override { return IsFiniteSize() && (GetSize() == 16);}
-
-        EBML_CONCRETE_CLASS(KaxPrevUID)
 };
 
 DECLARE_MKX_CONTEXT(KaxNextUID)
-class MATROSKA_DLL_API KaxNextUID : public KaxSegmentUID {
+DECLARE_MKX_BINARY (KaxNextUID)
   public:
-    KaxNextUID() = default;
-    KaxNextUID(const KaxNextUID & ElementToClone) = default;
     bool ValidateSize() const override { return IsFiniteSize() && (GetSize() == 16);}
-
-        EBML_CONCRETE_CLASS(KaxNextUID)
 };
 
 } // namespace libmatroska

src/KaxSemantic.cpp

@@ -67,9 +67,9 @@ DEFINE_END_SEMANTIC(KaxInfo)
 DEFINE_MKX_MASTER(KaxInfo, 0x1549A966, 4, KaxSegment, "Info")
 DEFINE_MKX_BINARY (KaxSegmentUID, 0x73A4, 2, KaxInfo, "SegmentUID")
 DEFINE_MKX_UNISTRING(KaxSegmentFilename, 0x7384, 2, KaxInfo, "SegmentFilename")
-DEFINE_MKX_BINARY_CONS(KaxPrevUID, 0x3CB923, 3, KaxInfo, "PrevUID")
+DEFINE_MKX_BINARY(KaxPrevUID, 0x3CB923, 3, KaxInfo, "PrevUID")
 DEFINE_MKX_UNISTRING(KaxPrevFilename, 0x3C83AB, 3, KaxInfo, "PrevFilename")
-DEFINE_MKX_BINARY_CONS(KaxNextUID, 0x3EB923, 3, KaxInfo, "NextUID")
+DEFINE_MKX_BINARY(KaxNextUID, 0x3EB923, 3, KaxInfo, "NextUID")
 DEFINE_MKX_UNISTRING(KaxNextFilename, 0x3E83BB, 3, KaxInfo, "NextFilename")
 DEFINE_MKX_BINARY (KaxSegmentFamily, 0x4444, 2, KaxInfo, "SegmentFamily")