diff options
Diffstat (limited to 'muse_qt4_evolution/synti/organ/reverb.cpp')
| -rw-r--r-- | muse_qt4_evolution/synti/organ/reverb.cpp | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/muse_qt4_evolution/synti/organ/reverb.cpp b/muse_qt4_evolution/synti/organ/reverb.cpp new file mode 100644 index 00000000..72775bc5 --- /dev/null +++ b/muse_qt4_evolution/synti/organ/reverb.cpp @@ -0,0 +1,163 @@ +//========================================================= +// MusE +// Linux Music Editor +// $Id:$ +// +// based on "freeverb" written by Jezar at Dreampoint, +// June 2000 +// +// (C) Copyright 2007 Werner Schweer (ws@seh.de) +//========================================================= + +#include "reverb.h" + +//--------------------------------------------------------- +// Reverb +//--------------------------------------------------------- + +Reverb::Reverb() + { + // Tie the components to their buffers + combL[0].setbuffer(bufcombL1,combtuningL1); + combR[0].setbuffer(bufcombR1,combtuningR1); + combL[1].setbuffer(bufcombL2,combtuningL2); + combR[1].setbuffer(bufcombR2,combtuningR2); + combL[2].setbuffer(bufcombL3,combtuningL3); + combR[2].setbuffer(bufcombR3,combtuningR3); + combL[3].setbuffer(bufcombL4,combtuningL4); + combR[3].setbuffer(bufcombR4,combtuningR4); + combL[4].setbuffer(bufcombL5,combtuningL5); + combR[4].setbuffer(bufcombR5,combtuningR5); + combL[5].setbuffer(bufcombL6,combtuningL6); + combR[5].setbuffer(bufcombR6,combtuningR6); + combL[6].setbuffer(bufcombL7,combtuningL7); + combR[6].setbuffer(bufcombR7,combtuningR7); + combL[7].setbuffer(bufcombL8,combtuningL8); + combR[7].setbuffer(bufcombR8,combtuningR8); + allpassL[0].setbuffer(bufallpassL1,allpasstuningL1); + allpassR[0].setbuffer(bufallpassR1,allpasstuningR1); + allpassL[1].setbuffer(bufallpassL2,allpasstuningL2); + allpassR[1].setbuffer(bufallpassR2,allpasstuningR2); + allpassL[2].setbuffer(bufallpassL3,allpasstuningL3); + allpassR[2].setbuffer(bufallpassR3,allpasstuningR3); + allpassL[3].setbuffer(bufallpassL4,allpasstuningL4); + allpassR[3].setbuffer(bufallpassR4,allpasstuningR4); + + // Set default values + allpassL[0].setfeedback(0.5f); + allpassR[0].setfeedback(0.5f); + allpassL[1].setfeedback(0.5f); + allpassR[1].setfeedback(0.5f); + allpassL[2].setfeedback(0.5f); + allpassR[2].setfeedback(0.5f); + allpassL[3].setfeedback(0.5f); + allpassR[3].setfeedback(0.5f); + + setRoomSize(.5); + setMix(.5); + setdamp(.5); + setwidth(initialwidth); + + // Buffer will be full of rubbish - so we MUST mute them + + for (int i = 0; i < numcombs; i++) { + combL[i].mute(); + combR[i].mute(); + } + for (int i=0;i<numallpasses;i++) { + allpassL[i].mute(); + allpassR[i].mute(); + } + } + +//--------------------------------------------------------- +// update +// Recalculate internal values after parameter change +//--------------------------------------------------------- + +void Reverb::update() + { + roomsize1 = roomsize; + damp1 = damp; + gain = fixedgain; + + for (int i = 0; i < numcombs; i++) { + combL[i].setfeedback(roomsize1); + combR[i].setfeedback(roomsize1); + } + + for (int i = 0; i < numcombs; i++) { + combL[i].setdamp(damp1); + combR[i].setdamp(damp1); + } + } + +//--------------------------------------------------------- +// setroomsize +//--------------------------------------------------------- + +void Reverb::setRoomSize(float value) + { + roomsize = (value*scaleroom) + offsetroom; + update(); + } + +//--------------------------------------------------------- +// setdamp +//--------------------------------------------------------- + +void Reverb::setdamp(float value) + { + damp = value*scaledamp; + update(); + } + +//--------------------------------------------------------- +// setwidth +//--------------------------------------------------------- + +void Reverb::setwidth(float value) + { + width = value; + update(); + } + +//--------------------------------------------------------- +// setMix +//--------------------------------------------------------- + +void Reverb::setMix(float value) + { + wetLevel = value; + } + +//--------------------------------------------------------- +// process +//--------------------------------------------------------- + +void Reverb::process(float* l, float* r, int n) + { + float wet = wetLevel; + float dry = 1.0 - wetLevel; + + for (int i = 0; i < n; ++i) { + float outL = 0.0; + float outR = 0.0; + float input = (l[i] + r[i]) * gain; + + // Accumulate comb filters in parallel + for (int k = 0; k < numcombs; k++) { + outL += combL[k].process(input); + outR += combR[k].process(input); + } + + // Feed through allpasses in series + for (int k = 0; k < numallpasses; k++) { + outL = allpassL[k].process(outL); + outR = allpassR[k].process(outR); + } + l[i] = outL * wet + l[i] * dry; + r[i] = outR * wet + r[i] * dry; + } + } + |