Line data    Source code

       1             : /***********************************************************************
       2             : Copyright (c) 2006-2011, Skype Limited. All rights reserved.
       3             : Redistribution and use in source and binary forms, with or without
       4             : modification, are permitted provided that the following conditions
       5             : are met:
       6             : - Redistributions of source code must retain the above copyright notice,
       7             : this list of conditions and the following disclaimer.
       8             : - Redistributions in binary form must reproduce the above copyright
       9             : notice, this list of conditions and the following disclaimer in the
      10             : documentation and/or other materials provided with the distribution.
      11             : - Neither the name of Internet Society, IETF or IETF Trust, nor the
      12             : names of specific contributors, may be used to endorse or promote
      13             : products derived from this software without specific prior written
      14             : permission.
      15             : THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
      16             : AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
      17             : IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
      18             : ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
      19             : LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
      20             : CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
      21             : SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
      22             : INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
      23             : CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
      24             : ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
      25             : POSSIBILITY OF SUCH DAMAGE.
      26             : ***********************************************************************/
      27             : 
      28             : #ifdef HAVE_CONFIG_H
      29             : #include "config.h"
      30             : #endif
      31             : 
      32             : #include "SigProc_FLP.h"
      33             : 
      34             : /* sum of squares of a silk_float array, with result as double */
      35           0 : double silk_energy_FLP(
      36             :     const silk_float    *data,
      37             :     opus_int            dataSize
      38             : )
      39             : {
      40             :     opus_int i;
      41             :     double   result;
      42             : 
      43             :     /* 4x unrolled loop */
      44           0 :     result = 0.0;
      45           0 :     for( i = 0; i < dataSize - 3; i += 4 ) {
      46           0 :         result += data[ i + 0 ] * (double)data[ i + 0 ] +
      47           0 :                   data[ i + 1 ] * (double)data[ i + 1 ] +
      48           0 :                   data[ i + 2 ] * (double)data[ i + 2 ] +
      49           0 :                   data[ i + 3 ] * (double)data[ i + 3 ];
      50             :     }
      51             : 
      52             :     /* add any remaining products */
      53           0 :     for( ; i < dataSize; i++ ) {
      54           0 :         result += data[ i ] * (double)data[ i ];
      55             :     }
      56             : 
      57           0 :     silk_assert( result >= 0.0 );
      58           0 :     return result;
      59             : }