/* | |
** 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; | |
} | |