Fraunhofer AAC codec.

License boilerplate update to follow.

Change-Id: I2810460c11a58b6d148d84673cc031f3685e79b5

1 files changed, 103 insertions, 0 deletions

diff --git a/libFDK/include/scramble.h b/libFDK/include/scramble.h
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+/***************************  Fraunhofer IIS FDK Tools  **********************
+
+                        (C) Copyright Fraunhofer IIS (2005)
+                               All Rights Reserved
+
+    Please be advised that this software and/or program delivery is
+    Confidential Information of Fraunhofer and subject to and covered by the
+
+    Fraunhofer IIS Software Evaluation Agreement
+    between Google Inc. and  Fraunhofer
+    effective and in full force since March 1, 2012.
+
+    You may use this software and/or program only under the terms and
+    conditions described in the above mentioned Fraunhofer IIS Software
+    Evaluation Agreement. Any other and/or further use requires a separate agreement.
+
+
+   $Id$
+   Author(s):
+   Description:
+
+   This software and/or program is protected by copyright law and international
+   treaties. Any reproduction or distribution of this software and/or program,
+   or any portion of it, may result in severe civil and criminal penalties, and
+   will be prosecuted to the maximum extent possible under law.
+
+******************************************************************************/
+
+#ifndef SCRAMBLE_H
+#define SCRAMBLE_H
+
+#include "common_fix.h"
+
+#if defined(__arm__)
+#include "arm/scramble.h"
+
+#elif defined(__mips__) && defined(__mips_dsp)	/* cppp replaced: elif */
+#include "mips/scramble.h"
+
+#endif
+
+/*****************************************************************************
+
+    functionname: scramble
+    description:  bitreversal of input data
+    returns:
+    input:
+    output:
+
+*****************************************************************************/
+#if !defined(FUNCTION_scramble_sgl)
+
+inline void scramble_sgl(FIXP_SGL *x, INT n)
+{
+  INT m,k,j;
+
+  for (m=1,j=0; m<n-1; m++)
+  {
+    {for(k=n>>1; (!((j^=k)&k)); k>>=1);}
+
+    if (j>m)
+    {
+      FIXP_SGL tmp;
+      tmp=x[2*m];
+      x[2*m]=x[2*j];
+      x[2*j]=tmp;
+
+      tmp=x[2*m+1];
+      x[2*m+1]=x[2*j+1];
+      x[2*j+1]=tmp;
+    }
+  }
+}
+#endif
+
+#if !defined(FUNCTION_scramble)
+
+/* default scramble functionality */
+inline void scramble(FIXP_DBL *x, INT n)
+{
+  INT m,k,j;
+  FDK_ASSERT(!(((UINT64)x)&(ALIGNMENT_DEFAULT-1)));
+
+  for (m=1,j=0; m<n-1; m++)
+  {
+    {for(k=n>>1; (!((j^=k)&k)); k>>=1);}
+
+    if (j>m)
+    {
+      FIXP_DBL tmp;
+      tmp=x[2*m];
+      x[2*m]=x[2*j];
+      x[2*j]=tmp;
+
+      tmp=x[2*m+1];
+      x[2*m+1]=x[2*j+1];
+      x[2*j+1]=tmp;
+    }
+  }
+}
+#endif /* !defined(FUNCTION_scramble) */
+
+#endif /* SCRAMBLE_H */