updt_tar.c revision e2e838afcf03e603a41a0455846eaf9614537c16
1e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard/* 2e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard ** Copyright 2003-2010, VisualOn, Inc. 3e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard ** 4e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard ** Licensed under the Apache License, Version 2.0 (the "License"); 5e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard ** you may not use this file except in compliance with the License. 6e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard ** You may obtain a copy of the License at 7e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard ** 8e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard ** http://www.apache.org/licenses/LICENSE-2.0 9e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard ** 10e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard ** Unless required by applicable law or agreed to in writing, software 11e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard ** distributed under the License is distributed on an "AS IS" BASIS, 12e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard ** See the License for the specific language governing permissions and 14e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard ** limitations under the License. 15e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard */ 16e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard 17e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard/*********************************************************************** 18e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard* File: updt_tar.c * 19e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard* * 20e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard* Description: Update the target vector for codebook search * 21e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard* * 22e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard************************************************************************/ 23e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard 24e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard#include "typedef.h" 25e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard#include "basic_op.h" 26e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard 27e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgardvoid Updt_tar( 28e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard Word16 * x, /* (i) Q0 : old target (for pitch search) */ 29e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard Word16 * x2, /* (o) Q0 : new target (for codebook search) */ 30e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard Word16 * y, /* (i) Q0 : filtered adaptive codebook vector */ 31e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard Word16 gain, /* (i) Q14 : adaptive codebook gain */ 32e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard Word16 L /* (i) : subframe size */ 33e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard ) 34e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard{ 35e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard Word32 i; 36e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard Word32 L_tmp; 37e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard 38e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard for (i = 0; i < L; i++) 39e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard { 40e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard L_tmp = x[i] << 15; 41e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard L_tmp -= (y[i] * gain)<<1; 42e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard x2[i] = extract_h(L_shl2(L_tmp, 1)); 43e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard } 44e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard 45e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard return; 46e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard} 47e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard 48e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard 49e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard 50