diff options
Diffstat (limited to 'attic/muse_qt4_evolution/synti/organ/reverb.h')
| -rw-r--r-- | attic/muse_qt4_evolution/synti/organ/reverb.h | 204 |
1 files changed, 0 insertions, 204 deletions
diff --git a/attic/muse_qt4_evolution/synti/organ/reverb.h b/attic/muse_qt4_evolution/synti/organ/reverb.h deleted file mode 100644 index d19fb18e..00000000 --- a/attic/muse_qt4_evolution/synti/organ/reverb.h +++ /dev/null @@ -1,204 +0,0 @@ -//========================================================= -// MusE -// Linux Music Editor -// $Id:$ -// -// based on "freeverb" written by Jezar at Dreampoint, -// June 2000 -// -// (C) Copyright 2007 Werner Schweer (ws@seh.de) -//========================================================= - -#ifndef __REVERB_H__ -#define __REVERB_H__ - -#define undenormalise(sample) \ - do { \ - volatile float __forced_float = 1e-29 + sample; \ - sample = __forced_float - 1e-29; \ - } while (0) - -const int numcombs = 8; -const int numallpasses = 4; -const float muted = 0; -const float fixedgain = 0.015f; -const float scaledamp = 0.4f; -const float scaleroom = 0.28f; -const float offsetroom = 0.7f; -const float initialwidth = 1.0; -const int stereospread = 23; - -// These values assume 44.1KHz sample rate -// they will probably be OK for 48KHz sample rate -// but would need scaling for 96KHz (or other) sample rates. -// The values were obtained by listening tests. -const int combtuningL1 = 1116; -const int combtuningR1 = 1116+stereospread; -const int combtuningL2 = 1188; -const int combtuningR2 = 1188+stereospread; -const int combtuningL3 = 1277; -const int combtuningR3 = 1277+stereospread; -const int combtuningL4 = 1356; -const int combtuningR4 = 1356+stereospread; -const int combtuningL5 = 1422; -const int combtuningR5 = 1422+stereospread; -const int combtuningL6 = 1491; -const int combtuningR6 = 1491+stereospread; -const int combtuningL7 = 1557; -const int combtuningR7 = 1557+stereospread; -const int combtuningL8 = 1617; -const int combtuningR8 = 1617+stereospread; -const int allpasstuningL1 = 556; -const int allpasstuningR1 = 556+stereospread; -const int allpasstuningL2 = 441; -const int allpasstuningR2 = 441+stereospread; -const int allpasstuningL3 = 341; -const int allpasstuningR3 = 341+stereospread; -const int allpasstuningL4 = 225; -const int allpasstuningR4 = 225+stereospread; - -//--------------------------------------------------------- -// allpass -//--------------------------------------------------------- - -class allpass - { - float feedback; - float *buffer; - int bufsize; - int bufidx; - - public: - allpass() { bufidx = 0; } - void setbuffer(float *buf, int size) { - buffer = buf; - bufsize = size; - } - float process(float input) { - float bufout = buffer[bufidx]; - undenormalise(bufout); - float output = -input + bufout; - buffer[bufidx] = input + (bufout*feedback); - if (++bufidx >= bufsize) - bufidx = 0; - return output; - } - void mute() { - memset(buffer, 0, sizeof(float) * bufsize); - } - void setfeedback(float val) { feedback = val; } - float getfeedback() { return feedback; } - }; - -//--------------------------------------------------------- -// comb -//--------------------------------------------------------- - -class comb - { - float feedback; - float filterstore; - float damp1; - float damp2; - float *buffer; - int bufsize; - int bufidx; - - public: - comb() { - filterstore = 0; - bufidx = 0; - } - void setbuffer(float *buf, int size) { - buffer = buf; - bufsize = size; - } - float process(float input) { - float output = buffer[bufidx]; - undenormalise(output); - filterstore = (output*damp2) + (filterstore*damp1); - undenormalise(filterstore); - buffer[bufidx] = input + (filterstore*feedback); - if (++bufidx >= bufsize) - bufidx = 0; - return output; - } - void mute() { - for (int i=0; i<bufsize; i++) - buffer[i]=0; - } - void setdamp(float val) { - damp1 = val; - damp2 = 1-val; - } - float getdamp() { return damp1; } - void setfeedback(float val) { feedback = val; } - float getfeedback() { return feedback; } - }; - - -//--------------------------------------------------------- -// Reverb -//--------------------------------------------------------- - -class Reverb { - float gain; - float roomsize,roomsize1; - float damp,damp1; - float width; - float mode; - - // Comb filters - comb combL[numcombs]; - comb combR[numcombs]; - - // Allpass filters - allpass allpassL[numallpasses]; - allpass allpassR[numallpasses]; - - // Buffers for the combs - float bufcombL1[combtuningL1]; - float bufcombR1[combtuningR1]; - float bufcombL2[combtuningL2]; - float bufcombR2[combtuningR2]; - float bufcombL3[combtuningL3]; - float bufcombR3[combtuningR3]; - float bufcombL4[combtuningL4]; - float bufcombR4[combtuningR4]; - float bufcombL5[combtuningL5]; - float bufcombR5[combtuningR5]; - float bufcombL6[combtuningL6]; - float bufcombR6[combtuningR6]; - float bufcombL7[combtuningL7]; - float bufcombR7[combtuningR7]; - float bufcombL8[combtuningL8]; - float bufcombR8[combtuningR8]; - - // Buffers for the allpasses - float bufallpassL1[allpasstuningL1]; - float bufallpassR1[allpasstuningR1]; - float bufallpassL2[allpasstuningL2]; - float bufallpassR2[allpasstuningR2]; - float bufallpassL3[allpasstuningL3]; - float bufallpassR3[allpasstuningR3]; - float bufallpassL4[allpasstuningL4]; - float bufallpassR4[allpasstuningR4]; - - float roomSize; - float damping; - float wetLevel; - - void update(); - - public: - Reverb(); - void process(float* l, float* r, int numsamples); - void setdamp(float value); - void setwidth(float value); - - void setRoomSize(float value); - void setMix(float value); - }; - -#endif - |