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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: updt_tar.c *
* *
* Description: Update the target vector for codebook search *
* *
************************************************************************/
#include "typedef.h"
#include "basic_op.h"
void Updt_tar(
Word16 * x, /* (i) Q0 : old target (for pitch search) */
Word16 * x2, /* (o) Q0 : new target (for codebook search) */
Word16 * y, /* (i) Q0 : filtered adaptive codebook vector */
Word16 gain, /* (i) Q14 : adaptive codebook gain */
Word16 L /* (i) : subframe size */
)
{
Word32 i;
Word32 L_tmp;
for (i = 0; i < L; i++)
{
L_tmp = x[i] << 15;
L_tmp -= (y[i] * gain)<<1;
x2[i] = extract_h(L_shl2(L_tmp, 1));
}
return;
}
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