From b0546e5e7f7044019892543c6c82029db8d564a7 Mon Sep 17 00:00:00 2001
From: Robert Jonsson <spamatica@gmail.com>
Date: Thu, 15 Sep 2011 12:14:55 +0000
Subject: moved attic to a branch of it's own

---
 .../synti/zynaddsubfx/DSP/SVFilter.C               | 152 ---------------------
 1 file changed, 152 deletions(-)
 delete mode 100644 attic/muse_qt4_evolution/synti/zynaddsubfx/DSP/SVFilter.C

(limited to 'attic/muse_qt4_evolution/synti/zynaddsubfx/DSP/SVFilter.C')

diff --git a/attic/muse_qt4_evolution/synti/zynaddsubfx/DSP/SVFilter.C b/attic/muse_qt4_evolution/synti/zynaddsubfx/DSP/SVFilter.C
deleted file mode 100644
index 8c0e16b2..00000000
--- a/attic/muse_qt4_evolution/synti/zynaddsubfx/DSP/SVFilter.C
+++ /dev/null
@@ -1,152 +0,0 @@
-/*
-  ZynAddSubFX - a software synthesizer
- 
-  SVFilter.C - Several state-variable filters
-  Copyright (C) 2002-2005 Nasca Octavian Paul
-  Author: Nasca Octavian Paul
-
-  This program is free software; you can redistribute it and/or modify
-  it under the terms of version 2 of the GNU General Public License 
-  as published by the Free Software Foundation.
-
-  This program is distributed in the hope that it will be useful,
-  but WITHOUT ANY WARRANTY; without even the implied warranty of
-  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-  GNU General Public License (version 2) for more details.
-
-  You should have received a copy of the GNU General Public License (version 2)
-  along with this program; if not, write to the Free Software Foundation,
-  Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
-
-*/
-
-#include <math.h>
-#include <stdio.h>
-#include "SVFilter.h"
-
-SVFilter::SVFilter(unsigned char Ftype,REALTYPE Ffreq, REALTYPE Fq,unsigned char Fstages){
-    stages=Fstages;
-    type=Ftype;
-    freq=Ffreq;
-    q=Fq;
-    gain=1.0;
-    outgain=1.0;
-    needsinterpolation=0;
-    firsttime=1;
-    if (stages>=MAX_FILTER_STAGES) stages=MAX_FILTER_STAGES;
-    cleanup();
-    setfreq_and_q(Ffreq,Fq);
-};
-
-SVFilter::~SVFilter(){
-};
-
-void SVFilter::cleanup(){
-    for (int i=0;i<MAX_FILTER_STAGES+1;i++){
-	st[i].low=0.0;st[i].high=0.0;
-	st[i].band=0.0;st[i].notch=0.0;
-    };
-    oldabovenq=0;
-    abovenq=0;
-};
-
-void SVFilter::computefiltercoefs(){
-    par.f=freq / SAMPLE_RATE*4.0;
-    if (par.f>0.99999) par.f=0.99999;
-    par.q=1.0-atan(sqrt(q))*2.0/PI;
-    par.q=pow(par.q,1.0/(stages+1));
-    par.q_sqrt=sqrt(par.q);
-};
-
-
-void SVFilter::setfreq(REALTYPE frequency){
-    if (frequency<0.1) frequency=0.1;
-    REALTYPE rap=freq/frequency;if (rap<1.0) rap=1.0/rap;
-    
-    oldabovenq=abovenq;abovenq=frequency>(SAMPLE_RATE/2-500.0);
-    
-    int nyquistthresh=(abovenq^oldabovenq);
-
-
-    if ((rap>3.0)||(nyquistthresh!=0)){//if the frequency is changed fast, it needs interpolation (now, filter and coeficients backup)
-	if (firsttime==0) needsinterpolation=1;
-	ipar=par;
-    };
-    freq=frequency;
-    computefiltercoefs();
-    firsttime=0;
-
-};
-
-void SVFilter::setfreq_and_q(REALTYPE frequency,REALTYPE q_){
-    q=q_;
-    setfreq(frequency);
-};
-
-void SVFilter::setq(REALTYPE q_){
-    q=q_;
-    computefiltercoefs();
-};
-
-void SVFilter::settype(int type_){
-    type=type_;
-    computefiltercoefs();
-};
-
-void SVFilter::setgain(REALTYPE dBgain){
-    gain=dB2rap(dBgain);
-    computefiltercoefs();
-};
-
-void SVFilter::setstages(int stages_){
-    if (stages_>=MAX_FILTER_STAGES) stages_=MAX_FILTER_STAGES-1;
-    stages=stages_;
-    cleanup();
-    computefiltercoefs();
-};
-
-void SVFilter::singlefilterout(REALTYPE *smp,fstage &x,parameters &par){
-    int i;
-    REALTYPE *out=NULL;
-    switch(type){
-	case 0: out=&x.low;break;
-	case 1: out=&x.high;break;
-	case 2: out=&x.band;break;
-	case 3: out=&x.notch;break;
-    };
-    
-    for (i=0;i<SOUND_BUFFER_SIZE;i++){
-	  x.low = x.low + par.f * x.band;
-	  x.high = par.q_sqrt * smp[i] - x.low - par.q*x.band;
-	  x.band = par.f * x.high + x.band;
-	  x.notch = x.high + x.low;
-
-	  smp[i]= *out;
-    };
-};
-
-void SVFilter::filterout(REALTYPE *smp){
-    int i;
-    REALTYPE *ismp=NULL;
-    
-    if (needsinterpolation!=0){
-	ismp=new REALTYPE[SOUND_BUFFER_SIZE];
-	for (i=0;i<SOUND_BUFFER_SIZE;i++) ismp[i]=smp[i];
-	for (i=0;i<stages+1;i++) singlefilterout(ismp,st[i],ipar);
-    };
-
-    for (i=0;i<stages+1;i++) singlefilterout(smp,st[i],par);
-
-    if (needsinterpolation!=0){
-	for (i=0;i<SOUND_BUFFER_SIZE;i++) {
-	    REALTYPE x=i/(REALTYPE) SOUND_BUFFER_SIZE;
-	    smp[i]=ismp[i]*(1.0-x)+smp[i]*x;
-	};
-	delete (ismp);
-	needsinterpolation=0;
-    };
-
-    for (i=0;i<SOUND_BUFFER_SIZE;i++) smp[i]*=outgain;
-
-};
-
-- 
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