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 27 void 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
