Fraunhofer AAC codec.

License boilerplate update to follow.

Change-Id: I2810460c11a58b6d148d84673cc031f3685e79b5

1 files changed, 110 insertions, 0 deletions

diff --git a/libFDK/src/arm/scale_arm.cpp b/libFDK/src/arm/scale_arm.cpp
new file mode 100644
index 0000000..906766f
--- /dev/null
+++ b/libFDK/src/arm/scale_arm.cpp
@@ -0,0 +1,110 @@
+/***************************  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): Arthur Tritthart
+   Description: Scaling operations for ARM
+
+   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.
+
+******************************************************************************/
+/* prevent multiple inclusion with re-definitions */
+#ifndef __INCLUDE_SCALE_ARM__
+#define __INCLUDE_SCALE_ARM__
+
+#define FUNCTION_scaleValuesWithFactor_DBL
+
+SCALE_INLINE
+void scaleValuesWithFactor(
+        FIXP_DBL *vector,
+        FIXP_DBL factor,
+        INT len,
+        INT scalefactor
+        )
+{
+  /* This code combines the fMult with the scaling             */
+  /* It performs a fMultDiv2 and increments shift by 1         */
+  int shift = scalefactor + 1;
+  FIXP_DBL *mySpec = vector;
+
+  shift = fixmin_I(shift,(INT)DFRACT_BITS-1);
+
+  if (shift >= 0)
+  {
+    for (int i=0; i<(len>>2); i++)
+    {
+      FIXP_DBL tmp0 = mySpec[0];
+      FIXP_DBL tmp1 = mySpec[1];
+      FIXP_DBL tmp2 = mySpec[2];
+      FIXP_DBL tmp3 = mySpec[3];
+      tmp0 = fMultDiv2(tmp0, factor);
+      tmp1 = fMultDiv2(tmp1, factor);
+      tmp2 = fMultDiv2(tmp2, factor);
+      tmp3 = fMultDiv2(tmp3, factor);
+      tmp0 <<= shift;
+      tmp1 <<= shift;
+      tmp2 <<= shift;
+      tmp3 <<= shift;
+      *mySpec++ = tmp0;
+      *mySpec++ = tmp1;
+      *mySpec++ = tmp2;
+      *mySpec++ = tmp3;
+    }
+    for (int i=len&3; i--;)
+    {
+      FIXP_DBL tmp0 = mySpec[0];
+      tmp0 = fMultDiv2(tmp0, factor);
+      tmp0 <<= shift;
+      *mySpec++ = tmp0;
+    }
+  }
+  else
+  {
+    shift = -shift;
+    for (int i=0; i<(len>>2); i++)
+    {
+      FIXP_DBL tmp0 = mySpec[0];
+      FIXP_DBL tmp1 = mySpec[1];
+      FIXP_DBL tmp2 = mySpec[2];
+      FIXP_DBL tmp3 = mySpec[3];
+      tmp0 = fMultDiv2(tmp0, factor);
+      tmp1 = fMultDiv2(tmp1, factor);
+      tmp2 = fMultDiv2(tmp2, factor);
+      tmp3 = fMultDiv2(tmp3, factor);
+      tmp0 >>= shift;
+      tmp1 >>= shift;
+      tmp2 >>= shift;
+      tmp3 >>= shift;
+      *mySpec++ = tmp0;
+      *mySpec++ = tmp1;
+      *mySpec++ = tmp2;
+      *mySpec++ = tmp3;
+    }
+    for (int i=len&3; i--;)
+    {
+      FIXP_DBL tmp0 = mySpec[0];
+      tmp0 = fMultDiv2(tmp0, factor);
+      tmp0 >>= shift;
+      *mySpec++ = tmp0;
+    }
+  }
+}
+
+#endif /* #ifndef __INCLUDE_SCALE_ARM__ */