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 File: pre_echo_control.c 18e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard 19e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard Content: Pre echo control functions 20e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard 21956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong*******************************************************************************/ 22956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong 23e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard#include "basic_op.h" 24e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard#include "oper_32b.h" 25956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong 26956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong#include "oper_32b.h" 27956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong#include "pre_echo_control.h" 28956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong 29956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong 30956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong/***************************************************************************** 31956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong* 32b676a05348e4c516fa8b57e33b10548e6142c3f8Mans Rullgard* function name:InitPreEchoControl 33956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong* description: init pre echo control parameter 34956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong* 35956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong*****************************************************************************/ 36956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dongvoid InitPreEchoControl(Word32 *pbThresholdNm1, 37956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong Word16 numPb, 38956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong Word32 *pbThresholdQuiet) 39956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong{ 40956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong Word16 pb; 41956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong 42956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong for(pb=0; pb<numPb; pb++) { 43b676a05348e4c516fa8b57e33b10548e6142c3f8Mans Rullgard pbThresholdNm1[pb] = pbThresholdQuiet[pb]; 44956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong } 45956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong} 46956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong 47956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong/***************************************************************************** 48956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong* 49b676a05348e4c516fa8b57e33b10548e6142c3f8Mans Rullgard* function name:PreEchoControl 50956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong* description: update shreshold to avoid pre echo 51956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong* thr(n) = max(rpmin*thrq(n), min(thrq(n), rpelev*thrq1(n))) 52956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong* 53956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong* 54956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong*****************************************************************************/ 55956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dongvoid PreEchoControl(Word32 *pbThresholdNm1, 56956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong Word16 numPb, 57956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong Word32 maxAllowedIncreaseFactor, 58956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong Word16 minRemainingThresholdFactor, 59956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong Word32 *pbThreshold, 60956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong Word16 mdctScale, 61956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong Word16 mdctScalenm1) 62956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong{ 63956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong Word32 i; 64956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong Word32 tmpThreshold1, tmpThreshold2; 65956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong Word32 scaling; 66956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong 67956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong /* maxAllowedIncreaseFactor is hard coded to 2 */ 68956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong (void)maxAllowedIncreaseFactor; 69956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong 70956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong scaling = ((mdctScale - mdctScalenm1) << 1); 71b676a05348e4c516fa8b57e33b10548e6142c3f8Mans Rullgard 72956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong if ( scaling > 0 ) { 73956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong for(i = 0; i < numPb; i++) { 74956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong tmpThreshold1 = pbThresholdNm1[i] >> (scaling-1); 75956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong tmpThreshold2 = L_mpy_ls(pbThreshold[i], minRemainingThresholdFactor); 76956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong 77956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong /* copy thresholds to internal memory */ 78b676a05348e4c516fa8b57e33b10548e6142c3f8Mans Rullgard pbThresholdNm1[i] = pbThreshold[i]; 79b676a05348e4c516fa8b57e33b10548e6142c3f8Mans Rullgard 80956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong 81956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong if(pbThreshold[i] > tmpThreshold1) { 82b676a05348e4c516fa8b57e33b10548e6142c3f8Mans Rullgard pbThreshold[i] = tmpThreshold1; 83956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong } 84b676a05348e4c516fa8b57e33b10548e6142c3f8Mans Rullgard 85956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong if(tmpThreshold2 > pbThreshold[i]) { 86b676a05348e4c516fa8b57e33b10548e6142c3f8Mans Rullgard pbThreshold[i] = tmpThreshold2; 87956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong } 88956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong 89956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong } 90956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong } 91956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong else { 92956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong scaling = -scaling; 93956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong for(i = 0; i < numPb; i++) { 94956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong 95956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong tmpThreshold1 = pbThresholdNm1[i] << 1; 96956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong tmpThreshold2 = L_mpy_ls(pbThreshold[i], minRemainingThresholdFactor); 97956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong 98956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong /* copy thresholds to internal memory */ 99b676a05348e4c516fa8b57e33b10548e6142c3f8Mans Rullgard pbThresholdNm1[i] = pbThreshold[i]; 100b676a05348e4c516fa8b57e33b10548e6142c3f8Mans Rullgard 101956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong 102956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong if(((pbThreshold[i] >> scaling) > tmpThreshold1)) { 103956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong pbThreshold[i] = tmpThreshold1 << scaling; 104956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong } 105b676a05348e4c516fa8b57e33b10548e6142c3f8Mans Rullgard 106956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong if(tmpThreshold2 > pbThreshold[i]) { 107b676a05348e4c516fa8b57e33b10548e6142c3f8Mans Rullgard pbThreshold[i] = tmpThreshold2; 108956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong } 109956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong 110956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong } 111956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong } 112956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong} 113956c553ab0ce72f8074ad0fda2ffd66a0305700cJames Dong 114