1/*
2 ** Copyright 2003-2010, VisualOn, Inc.
3 **
4 ** Licensed under the Apache License, Version 2.0 (the "License");
5 ** you may not use this file except in compliance with the License.
6 ** You may obtain a copy of the License at
7 **
8 **     http://www.apache.org/licenses/LICENSE-2.0
9 **
10 ** Unless required by applicable law or agreed to in writing, software
11 ** distributed under the License is distributed on an "AS IS" BASIS,
12 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 ** See the License for the specific language governing permissions and
14 ** limitations under the License.
15 */
16
17/***********************************************************************
18*       File: updt_tar.c                                               *
19*                                                                      *
20*       Description: Update the target vector for codebook search      *
21*                                                                      *
22************************************************************************/
23
24#include "typedef.h"
25#include "basic_op.h"
26
27void Updt_tar(
28        Word16 * x,                           /* (i) Q0  : old target (for pitch search)     */
29        Word16 * x2,                          /* (o) Q0  : new target (for codebook search)  */
30        Word16 * y,                           /* (i) Q0  : filtered adaptive codebook vector */
31        Word16 gain,                          /* (i) Q14 : adaptive codebook gain            */
32        Word16 L                              /* (i)     : subframe size                     */
33         )
34{
35    Word32 i;
36    Word32 L_tmp, L_tmp2;
37
38    for (i = 0; i < L; i++)
39    {
40        L_tmp = x[i] << 15;
41        L_tmp2 = L_mult(y[i], gain);
42        L_tmp = L_sub(L_tmp, L_tmp2);
43        x2[i] = extract_h(L_shl2(L_tmp, 1));
44    }
45
46    return;
47}
48
49
50
51