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: lag_wind.c                                                *
19*                                                                      *
20*      Description: Lag_windows on autocorrelations                *
21*                   r[i] *= lag_wind[i]                            *
22*                                                                      *
23************************************************************************/
24
25#include "typedef.h"
26#include "basic_op.h"
27#include "oper_32b.h"
28#include "lag_wind.tab"
29
30
31void Lag_window(
32        Word16 r_h[],                         /* (i/o)   : Autocorrelations  (msb)          */
33        Word16 r_l[]                          /* (i/o)   : Autocorrelations  (lsb)          */
34           )
35{
36    Word32 i;
37    Word32 x;
38
39    for (i = 1; i <= M; i++)
40    {
41        x = Mpy_32(r_h[i], r_l[i], volag_h[i - 1], volag_l[i - 1]);
42        r_h[i] = x >> 16;
43        r_l[i] = (x & 0xffff)>>1;
44    }
45    return;
46}
47
48
49
50