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authorDave Burke <daveburke@google.com>2012-04-17 09:51:45 -0700
committerDave Burke <daveburke@google.com>2012-04-17 23:04:43 -0700
commit9bf37cc9712506b2483650c82d3c41152337ef7e (patch)
tree77db44e2bae06e3d144b255628be2b7a55c581d3 /libFDK/src/arm/scale_arm.cpp
parenta37315fe10ee143d6d0b28c19d41a476a23e63ea (diff)
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Fraunhofer AAC codec.
License boilerplate update to follow. Change-Id: I2810460c11a58b6d148d84673cc031f3685e79b5
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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): 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__ */