add oversampler

oversampling/WDL/sha.h

@@ -0,0 +1,54 @@
+/*
+    WDL - sha.h
+    Copyright (C) 2005 and later, Cockos Incorporated
+  
+    This software is provided 'as-is', without any express or implied
+    warranty.  In no event will the authors be held liable for any damages
+    arising from the use of this software.
+
+    Permission is granted to anyone to use this software for any purpose,
+    including commercial applications, and to alter it and redistribute it
+    freely, subject to the following restrictions:
+
+    1. The origin of this software must not be misrepresented; you must not
+       claim that you wrote the original software. If you use this software
+       in a product, an acknowledgment in the product documentation would be
+       appreciated but is not required.
+    2. Altered source versions must be plainly marked as such, and must not be
+       misrepresented as being the original software.
+    3. This notice may not be removed or altered from any source distribution.
+      
+*/
+
+/*
+
+  This header provides an interface to the WDL_SHA1 object, which performs SHA-1 hashes
+  on data.
+*/
+
+#ifndef _WDL_SHA_H_
+#define _WDL_SHA_H_
+
+
+#define WDL_SHA1SIZE 20
+
+// sha
+
+class WDL_SHA1 {
+
+public:
+  WDL_SHA1();
+  void add(const void *data, int datalen);
+  void result(void *out);
+  void reset();
+
+private:
+
+  unsigned int H[5];
+  unsigned int W[80];
+  int lenW;
+  unsigned int size[2];
+};
+
+#endif
+