60 lines
2.4 KiB
C
60 lines
2.4 KiB
C
/***********************************************************************
|
|
Copyright (c) 2006-2011, Skype Limited. All rights reserved.
|
|
Redistribution and use in source and binary forms, with or without
|
|
modification, are permitted provided that the following conditions
|
|
are met:
|
|
- Redistributions of source code must retain the above copyright notice,
|
|
this list of conditions and the following disclaimer.
|
|
- Redistributions in binary form must reproduce the above copyright
|
|
notice, this list of conditions and the following disclaimer in the
|
|
documentation and/or other materials provided with the distribution.
|
|
- Neither the name of Internet Society, IETF or IETF Trust, nor the
|
|
names of specific contributors, may be used to endorse or promote
|
|
products derived from this software without specific prior written
|
|
permission.
|
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
|
|
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
POSSIBILITY OF SUCH DAMAGE.
|
|
***********************************************************************/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include "SigProc_FLP.h"
|
|
|
|
/* sum of squares of a silk_float array, with result as double */
|
|
double silk_energy_FLP(
|
|
const silk_float *data,
|
|
opus_int dataSize
|
|
)
|
|
{
|
|
opus_int i;
|
|
double result;
|
|
|
|
/* 4x unrolled loop */
|
|
result = 0.0;
|
|
for( i = 0; i < dataSize - 3; i += 4 ) {
|
|
result += data[ i + 0 ] * (double)data[ i + 0 ] +
|
|
data[ i + 1 ] * (double)data[ i + 1 ] +
|
|
data[ i + 2 ] * (double)data[ i + 2 ] +
|
|
data[ i + 3 ] * (double)data[ i + 3 ];
|
|
}
|
|
|
|
/* add any remaining products */
|
|
for( ; i < dataSize; i++ ) {
|
|
result += data[ i ] * (double)data[ i ];
|
|
}
|
|
|
|
silk_assert( result >= 0.0 );
|
|
return result;
|
|
}
|