129 lines
2.9 KiB
C
129 lines
2.9 KiB
C
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/*
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==============================================================================
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This file is part of Obxd synthesizer.
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Copyright <EFBFBD> 2013-2014 Filatov Vadim
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Contact author via email :
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justdat_@_e1.ru
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This file may be licensed under the terms of of the
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GNU General Public License Version 2 (the ``GPL'').
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Software distributed under the License is distributed
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on an ``AS IS'' basis, WITHOUT WARRANTY OF ANY KIND, either
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express or implied. See the GPL for the specific language
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governing rights and limitations.
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You should have received a copy of the GPL along with this
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program. If not, go to http://www.gnu.org/licenses/gpl.html
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or write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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==============================================================================
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*/
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#pragma once
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#include "SynthEngine.h"
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#include "BlepData.h"
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class SawOsc
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{
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DelayLine<Samples> del1;
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float buffer1[Samples*2];
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const int hsam;
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const int n;
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float const * blepPTR;
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int bP1;
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public:
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SawOsc() : hsam(Samples)
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, n(Samples*2)
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{
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bP1=0;
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//del1 = new DelayLine(hsam);
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//buffer1= new float[n];
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for(int i = 0 ; i < n ; i++)
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buffer1[i]=0;
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blepPTR = blep;
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}
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~SawOsc()
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{
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//delete del1;
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//delete buffer1;
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}
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inline void setDecimation()
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{
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blepPTR = blepd2;
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}
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inline void removeDecimation()
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{
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blepPTR = blep;
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}
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inline float aliasReduction()
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{
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return -getNextBlep(buffer1,bP1);
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}
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inline void processMaster(float x,float delta)
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{
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if(x >= 1.0f)
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{
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x-=1.0f;
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mixInImpulseCenter(buffer1,bP1,x/delta, 1);
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}
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}
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inline float getValue(float x)
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{
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return del1.feedReturn(x-0.5);
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}
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inline float getValueFast(float x)
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{
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return x - 0.5;
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}
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inline void processSlave(float x , float delta,bool hardSyncReset,float hardSyncFrac)
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{
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if(x >= 1.0f)
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{
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x -= 1.0f;
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if(((!hardSyncReset)||(x/delta > hardSyncFrac)))//de morgan processed equation
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{
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mixInImpulseCenter(buffer1,bP1,x/delta, 1);
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}
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else
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{
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//if transition do not ocurred
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x+=1;
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}
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}
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if(hardSyncReset)
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{
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float fracMaster = (delta * hardSyncFrac);
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float trans = (x-fracMaster);
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mixInImpulseCenter(buffer1,bP1,hardSyncFrac,trans);
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}
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}
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inline void mixInImpulseCenter(float * buf,int& bpos,float offset, float scale)
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{
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int lpIn =(int)(B_OVERSAMPLING*(offset));
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float frac = offset * B_OVERSAMPLING - lpIn;
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float f1 = 1.0f-frac;
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for(int i = 0 ; i < Samples;i++)
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{
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float mixvalue = (blepPTR[lpIn]*f1+blepPTR[lpIn+1]*frac);
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buf[(bpos+i)&(n-1)] += mixvalue*scale;
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lpIn += B_OVERSAMPLING;
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}
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for(int i = Samples ; i <n;i++)
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{
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float mixvalue = (blepPTR[lpIn]*f1+blepPTR[lpIn+1]*frac);
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buf[(bpos+i)&(n-1)] -= mixvalue*scale;
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lpIn += B_OVERSAMPLING;
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}
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}
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inline float getNextBlep(float* buf,int& bpos)
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{
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buf[bpos]= 0.0f;
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bpos++;
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// Wrap pos
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bpos&=(n-1);
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return buf[bpos];
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}
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};
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