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/*
** Copyright 2003-2010, VisualOn, Inc.
**
** Licensed under the Apache License, Version 2.0 (the "License");
** you may not use this file except in compliance with the License.
** You may obtain a copy of the License at
**
** http://www.apache.org/licenses/LICENSE-2.0
**
** Unless required by applicable law or agreed to in writing, software
** distributed under the License is distributed on an "AS IS" BASIS,
** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
** See the License for the specific language governing permissions and
** limitations under the License.
*/
/***********************************************************************
* File: lag_wind.c *
* *
* Description: Lag_windows on autocorrelations *
* r[i] *= lag_wind[i] *
* *
************************************************************************/
#include "typedef.h"
#include "basic_op.h"
#include "oper_32b.h"
#include "lag_wind.tab"
void Lag_window(
Word16 r_h[], /* (i/o) : Autocorrelations (msb) */
Word16 r_l[] /* (i/o) : Autocorrelations (lsb) */
)
{
Word32 i;
Word32 x;
for (i = 1; i <= M; i++)
{
x = Mpy_32(r_h[i], r_l[i], volag_h[i - 1], volag_l[i - 1]);
r_h[i] = x >> 16;
r_l[i] = (x & 0xffff)>>1;
}
return;
}
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