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: pit_shrp.c * 19e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard* * 20e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard* Description: Performs Pitch sharpening routine * 21e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard* * 22e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard************************************************************************/ 23e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard 24e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard#include "typedef.h" 25e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard#include "basic_op.h" 26e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard 27e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgardvoid Pit_shrp( 28e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard Word16 * x, /* in/out: impulse response (or algebraic code) */ 29e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard Word16 pit_lag, /* input : pitch lag */ 30e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard Word16 sharp, /* input : pitch sharpening factor (Q15) */ 31e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard Word16 L_subfr /* input : subframe size */ 32e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard ) 33e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard{ 34e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard Word32 i; 35e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard Word32 L_tmp; 36e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard Word16 *x_ptr = x + pit_lag; 37e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard 38e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard for (i = pit_lag; i < L_subfr; i++) 39e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard { 40e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard L_tmp = (*x_ptr << 15); 41e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard L_tmp += *x++ * sharp; 42e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard *x_ptr++ = ((L_tmp + 0x4000)>>15); 43e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard } 44e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard 45e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard return; 46e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard} 47e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard 48e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard 49e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard 50