add oversampler

oversampling/WDL/fnv64.h

@@ -0,0 +1,18 @@
+#ifndef _WDL_FNV64_H_
+#define _WDL_FNV64_H_
+
+#include "wdltypes.h"
+
+#define WDL_FNV64_IV WDL_UINT64_CONST(0xCBF29CE484222325)
+
+static WDL_STATICFUNC_UNUSED WDL_UINT64 WDL_FNV64(WDL_UINT64 h, const unsigned char* data, int sz)
+{
+  int i;
+  for (i=0; i < sz; ++i)
+  {
+    h *= WDL_UINT64_CONST(0x00000100000001B3);
+    h ^= data[i];
+  }
+  return h;
+}
+#endif