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/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_NearestNeighbor.c
******************************************************************/
#include "defines.h"
/*----------------------------------------------------------------*
* Find index in array such that the array element with said
* index is the element of said array closest to "value"
* according to the squared-error criterion
*---------------------------------------------------------------*/
void WebRtcIlbcfix_NearestNeighbor(
int16_t *index, /* (o) index of array element closest to value */
int16_t *array, /* (i) data array (Q2) */
int16_t value, /* (i) value (Q2) */
int16_t arlength /* (i) dimension of data array (==8) */
){
int i;
int16_t diff;
/* Stack based */
int32_t crit[8];
/* Calculate square distance */
for(i=0;i<arlength;i++){
diff=array[i]-value;
crit[i]=WEBRTC_SPL_MUL_16_16(diff, diff);
}
/* Find the minimum square distance */
*index=WebRtcSpl_MinIndexW32(crit, (int16_t)arlength);
}
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