fix: Fixes Date computation.

Author: damencho

src/main/java/org/ebml/DateElement.java

@@ -25,7 +25,7 @@
 public class DateElement extends SignedIntegerElement
 {
   // const uint64 EbmlDate::UnixEpochDelay = 978307200; // 2001/01/01 00:00:00 UTC
-  public static final long UnixEpochDelay = 978307200; // 2001/01/01 00:00:00 UTC
+  public static final long UnixEpochDelay = 978307200000L; // 2001/01/01 00:00:00 UTC
   private static final int MIN_SIZE_LENGTH = 8;
 
   public DateElement(final byte[] type)
@@ -40,18 +40,18 @@ public DateElement()
 
   /**
    * Set the Date of this element
-   * 
+   *
    * @param value Date to set
    */
   public void setDate(final Date value)
   {
-    final long val = (value.getTime() - UnixEpochDelay) * 1000000000;
+    final long val = (value.getTime() - UnixEpochDelay) * 1000000;
     setData(ByteBuffer.wrap(packInt(val, MIN_SIZE_LENGTH)));
   }
 
   /**
    * Get the Date value of this element
-   * 
+   *
    * @return Date of this element
    */
   public Date getDate()
@@ -61,7 +61,7 @@ public Date getDate()
      * long diff1 = start.getTime(); long diff2 = end.getTime(); long diff3 = Date.UTC(2001, 1, 1, 0, 0, 0) - Date.UTC(1970, 1, 1, 0, 0, 0);
      */
     long val = getValue();
-    val = val / 1000000000 + UnixEpochDelay;
+    val = val / 1000000 + UnixEpochDelay;
     return new Date(val);
   }