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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__ */
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