diff options
author | Robert Jonsson <spamatica@gmail.com> | 2009-12-27 11:30:35 +0000 |
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committer | Robert Jonsson <spamatica@gmail.com> | 2009-12-27 11:30:35 +0000 |
commit | b703eab295330e6f81564fbb39a10a1a2fdd2f54 (patch) | |
tree | e46b5c9a6bc22fd661c15d1d2123f5bf631cef80 /muse_qt4_evolution/synti/zynaddsubfx/DSP/SVFilter.h | |
parent | 5d5fa0fdf913907edbc3d2d29a7548f0cb658c94 (diff) |
moved old qt4 branch
Diffstat (limited to 'muse_qt4_evolution/synti/zynaddsubfx/DSP/SVFilter.h')
-rw-r--r-- | muse_qt4_evolution/synti/zynaddsubfx/DSP/SVFilter.h | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/muse_qt4_evolution/synti/zynaddsubfx/DSP/SVFilter.h b/muse_qt4_evolution/synti/zynaddsubfx/DSP/SVFilter.h new file mode 100644 index 00000000..3117e2c9 --- /dev/null +++ b/muse_qt4_evolution/synti/zynaddsubfx/DSP/SVFilter.h @@ -0,0 +1,67 @@ +/* + ZynAddSubFX - a software synthesizer + + SV Filter.h - 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 + +*/ + +#ifndef SV_FILTER_H +#define SV_FILTER_H + +#include "../globals.h" +#include "Filter_.h" +class SVFilter:public Filter_{ + public: + SVFilter(unsigned char Ftype,REALTYPE Ffreq, REALTYPE Fq,unsigned char Fstages); + ~SVFilter(); + void filterout(REALTYPE *smp); + void setfreq(REALTYPE frequency); + void setfreq_and_q(REALTYPE frequency,REALTYPE q_); + void setq(REALTYPE q_); + + void settype(int type_); + void setgain(REALTYPE dBgain); + void setstages(int stages_); + void cleanup(); + + private: + struct fstage{ + REALTYPE low,high,band,notch; + } st[MAX_FILTER_STAGES+1]; + + struct parameters{ + REALTYPE f,q,q_sqrt; + }par,ipar; + + + void singlefilterout(REALTYPE *smp,fstage &x,parameters &par); + void computefiltercoefs(); + int type;//The type of the filter (LPF1,HPF1,LPF2,HPF2...) + int stages;//how many times the filter is applied (0->1,1->2,etc.) + REALTYPE freq;//Frequency given in Hz + REALTYPE q; //Q factor (resonance or Q factor) + REALTYPE gain;//the gain of the filter (if are shelf/peak) filters + + int abovenq;//this is 1 if the frequency is above the nyquist + int oldabovenq; + int needsinterpolation,firsttime; +}; + + +#endif + |