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/******************************** Fraunhofer IIS ***************************
(C) Copyright Fraunhofer IIS (2010)
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: (ARM optimised) Scaling of spectral data
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.
******************************************************************************/
#define FUNCTION_CBlock_ScaleSpectralData_func1
/* Note: This loop is only separated for ARM in order to save cycles
by loop unrolling. The ARM core provides by default a 5-cycle
loop overhead per sample, that goes down to 1-cycle per sample
with an optimal 4x-loop construct (do - 4x - while).
*/
FDK_INLINE static void CBlock_ScaleSpectralData_func1(
FIXP_DBL *pSpectrum,
int max_band,
const SHORT * RESTRICT BandOffsets,
int SpecScale_window,
const SHORT * RESTRICT pSfbScale,
int window)
{
int band_offset = 0;
for (int band=0; band < max_band; band++)
{
int runs = band_offset;
band_offset = BandOffsets[band+1];
runs = band_offset - runs; /* is always a multiple of 4 */
int scale = SpecScale_window-pSfbScale[window*16+band];
if (scale)
{
do
{
FIXP_DBL tmp0, tmp1, tmp2, tmp3;
tmp0 = pSpectrum[0];
tmp1 = pSpectrum[1];
tmp2 = pSpectrum[2];
tmp3 = pSpectrum[3];
tmp0 >>= scale;
tmp1 >>= scale;
tmp2 >>= scale;
tmp3 >>= scale;
*pSpectrum++ = tmp0;
*pSpectrum++ = tmp1;
*pSpectrum++ = tmp2;
*pSpectrum++ = tmp3;
} while ((runs = runs-4) != 0);
}
else
{
pSpectrum+= runs;
}
}
}
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