envelopes
This commit is contained in:
Gordon JC Pearce
parent
634d516b5f
commit
88230d862d
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@ -18,6 +18,34 @@
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#include "module.hpp"
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Module::Module() {
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#include "tables.hpp"
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Module::Module() {
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}
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void Module::run(Voice* voice) {
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// run updates for module board
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for (uint32_t i = 0; i < NUM_VOICES; i++) {
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switch (voice[i].envPhase) {
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case 0:
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voice[i].envTarget = 0;
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voice[i].envTc = 1-(decayTable[patchRam.env_r] / 65536.0f);
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voice[i].env = (voice[i].envTarget - voice[i].env) * voice[i].envTc + voice[i].env;
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break;
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case 1:
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voice[i].envTarget = 1;
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voice[i].env += attackTable[patchRam.env_a] / 65536.0f;
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break;
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case 2:
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voice[i].envTarget = patchRam.env_s / 127.0f;
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voice[i].envTc = 1 - (decayTable[patchRam.env_d] / 65536.0f);
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voice[i].env = (voice[i].envTarget - voice[i].env) * voice[i].envTc + voice[i].env;
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break;
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}
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//voice[i].env = (voice[i].envTarget - voice[i].env) * voice[i].envTc + voice[i].env;
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if (voice[i].env > 1.0f) {
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voice[i].env = 1.0f;
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voice[i].envPhase = 2; // flip to decay
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}
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}
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}
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@ -23,10 +23,14 @@
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#include "DistrhoPluginInfo.h"
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class Voice;
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class Module {
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public:
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Module();
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//Voice voices[NUM_VOICES];
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void run(Voice* voice);
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// Voice voices[NUM_VOICES];
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float vcfCutoff = 0, vcfReso = 0;
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// precomputed values for all voices
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@ -59,15 +63,18 @@ class Voice {
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Voice();
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void on(uint8_t note);
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void off();
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void run(Module *m, float *buffer, uint32_t samples);
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void run(Module* m, float* buffer, uint32_t samples);
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uint8_t envPhase = 0;
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float env = 0; // output amplitude
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float envTc = 0;
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float envTarget = 0;
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private:
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float omega = 0, theta = 0; // phase increment and angle
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float delay = 0, lastpw = 0; // delay slots for antialiasing
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uint8_t pulseStage = 1; // pulse wave phase
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float subosc = 1; // sub oscillator flipflop output
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float amp = 0; // output amplitude
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};
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#endif
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@ -77,6 +77,7 @@ void Peacock::run(const float**, float** outputs, uint32_t frames, const MidiEve
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runMidi(midiEvents, midiEventCount, framePos + blockLeft);
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// FIXME run one IC29 loop
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m->run(voice);
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}
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// how many frames to do? Are we about to run off an update block
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@ -0,0 +1,87 @@
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/*
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Chassis polysynth framework
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Copyright 2024 Gordon JC Pearce <gordonjcp@gjcp.net>
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Permission to use, copy, modify, and/or distribute this software for any
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purpose with or without fee is hereby granted, provided that the above
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copyright notice and this permission notice appear in all copies.
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THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
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OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
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CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#pragma once
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#include <stdint.h>
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uint16_t attackTable[128] = {
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0x4000, 0x2000, 0x1000, 0x0aaa, 0x0800, 0x0666, 0x0555, 0x0492, 0x0400,
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0x038e, 0x0333, 0x02e9, 0x02ab, 0x0276, 0x0249, 0x0222, 0x0200, 0x01e2,
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0x01c7, 0x01af, 0x0199, 0x0186, 0x0174, 0x0164, 0x0155, 0x0148, 0x013b,
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0x012f, 0x0124, 0x011a, 0x0111, 0x0108, 0x0100, 0x00f8, 0x00f1, 0x00ea,
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0x00e4, 0x00dd, 0x00d8, 0x00d2, 0x00cd, 0x00c8, 0x00c3, 0x00bf, 0x00ba,
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0x00b6, 0x00b2, 0x00ae, 0x00ab, 0x00a7, 0x00a4, 0x00a1, 0x009e, 0x009b,
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0x0098, 0x0095, 0x0092, 0x0090, 0x008d, 0x008b, 0x0089, 0x0086, 0x0084,
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0x0082, 0x007f, 0x007d, 0x007a, 0x0077, 0x0074, 0x0072, 0x006f, 0x006c,
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0x0069, 0x0067, 0x0064, 0x0061, 0x005e, 0x005c, 0x0059, 0x0056, 0x0053,
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0x0050, 0x004e, 0x004b, 0x0048, 0x0045, 0x0042, 0x0040, 0x003f, 0x003d,
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0x003c, 0x003a, 0x0039, 0x0037, 0x0036, 0x0034, 0x0033, 0x0031, 0x0030,
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0x002e, 0x002d, 0x002b, 0x002a, 0x0028, 0x0027, 0x0025, 0x0024, 0x0022,
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0x0021, 0x0021, 0x0020, 0x0020, 0x001f, 0x001f, 0x001e, 0x001e, 0x001d,
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0x001d, 0x001c, 0x001c, 0x001b, 0x001b, 0x001a, 0x0019, 0x0018, 0x0017,
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0x0016, 0x0015};
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uint16_t decayTable[128] = {
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0x1000, 0x3000, 0x5000, 0x7000, 0x9000, 0xa000, 0xa800, 0xb000, 0xb800,
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0xc000, 0xc800, 0xd000, 0xd800, 0xe000, 0xe800, 0xf000, 0xf080, 0xf100,
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0xf180, 0xf200, 0xf280, 0xf300, 0xf380, 0xf400, 0xf480, 0xf500, 0xf580,
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0xf600, 0xf680, 0xf700, 0xf780, 0xf800, 0xf880, 0xf900, 0xf980, 0xfa00,
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0xfa80, 0xfb00, 0xfb80, 0xfc00, 0xfc80, 0xfd00, 0xfd80, 0xfe00, 0xfe0c,
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0xfe18, 0xfe24, 0xfe30, 0xfe3c, 0xfe48, 0xfe54, 0xfe60, 0xfe6c, 0xfe78,
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0xfe84, 0xfe90, 0xfe9c, 0xfea8, 0xfeb4, 0xfec0, 0xfecc, 0xfed8, 0xfee4,
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0xfef0, 0xfefc, 0xff08, 0xff0c, 0xff10, 0xff14, 0xff18, 0xff1c, 0xff20,
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0xff24, 0xff28, 0xff2c, 0xff30, 0xff34, 0xff38, 0xff3c, 0xff40, 0xff44,
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0xff48, 0xff4c, 0xff50, 0xff54, 0xff58, 0xff5c, 0xff60, 0xff64, 0xff68,
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0xff6c, 0xff70, 0xff74, 0xff78, 0xff7c, 0xff80, 0xff84, 0xff88, 0xff8c,
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0xff90, 0xff94, 0xff98, 0xff9c, 0xffa0, 0xffa4, 0xffa8, 0xffac, 0xffb0,
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0xffb4, 0xffb8, 0xffbc, 0xffc0, 0xffc4, 0xffc8, 0xffcc, 0xffd0, 0xffd4,
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0xffd8, 0xffdc, 0xffe0, 0xffe4, 0xffe8, 0xffec, 0xfff0, 0xfff1, 0xfff2,
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0xfff3, 0xfff4};
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uint8_t lfoDepthTable[128] = {
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0x00, 0x00, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09,
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0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15,
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0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, 0x20, 0x21,
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0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d,
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0x2e, 0x2f, 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39,
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0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x40, 0x42, 0x44, 0x46, 0x48, 0x4a, 0x4c,
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0x4e, 0x50, 0x52, 0x54, 0x56, 0x58, 0x5a, 0x5c, 0x5e, 0x60, 0x62, 0x64,
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0x66, 0x68, 0x6a, 0x6c, 0x6e, 0x70, 0x72, 0x74, 0x76, 0x78, 0x7a, 0x7c,
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0x80, 0x84, 0x88, 0x8c, 0x90, 0x94, 0x98, 0x9c, 0xa0, 0xa4, 0xa8, 0xac,
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0xb0, 0xb4, 0xb8, 0xbc, 0xc0, 0xc4, 0xc8, 0xcc, 0xd0, 0xd4, 0xd8, 0xdc,
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0xe0, 0xe4, 0xe8, 0xec, 0xf0, 0xf8, 0xff, 0xff};
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uint16_t lfoRateTable[128] = {
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0x0005, 0x000f, 0x0019, 0x0028, 0x0037, 0x0046, 0x0050, 0x005a, 0x0064,
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0x006e, 0x0078, 0x0082, 0x008c, 0x0096, 0x00a0, 0x00aa, 0x00b4, 0x00be,
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0x00c8, 0x00d2, 0x00dc, 0x00e6, 0x00f0, 0x00fa, 0x0104, 0x010e, 0x0118,
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0x0122, 0x012c, 0x0136, 0x0140, 0x014a, 0x0154, 0x015e, 0x0168, 0x0172,
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0x017c, 0x0186, 0x0190, 0x019a, 0x01a4, 0x01ae, 0x01b8, 0x01c2, 0x01cc,
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0x01d6, 0x01e0, 0x01ea, 0x01f4, 0x01fe, 0x0208, 0x0212, 0x021c, 0x0226,
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0x0230, 0x023a, 0x0244, 0x024e, 0x0258, 0x0262, 0x026c, 0x0276, 0x0280,
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0x028a, 0x029a, 0x02aa, 0x02ba, 0x02ca, 0x02da, 0x02ea, 0x02fa, 0x030a,
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0x031a, 0x032a, 0x033a, 0x034a, 0x035a, 0x036a, 0x037a, 0x038a, 0x039a,
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0x03aa, 0x03ba, 0x03ca, 0x03da, 0x03ea, 0x03fa, 0x040a, 0x041a, 0x042a,
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0x043a, 0x044a, 0x045a, 0x046a, 0x047a, 0x048a, 0x04be, 0x04f2, 0x0526,
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0x055a, 0x058e, 0x05c2, 0x05f6, 0x062c, 0x0672, 0x06b8, 0x0708, 0x0758,
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0x07a8, 0x07f8, 0x085c, 0x08c0, 0x0924, 0x0988, 0x09ec, 0x0a50, 0x0ab4,
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0x0b18, 0x0b7c, 0x0be0, 0x0c58, 0x0cd0, 0x0d48, 0x0dde, 0x0e74, 0x0f0a,
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0x0fa0, 0x1000};
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uint16_t lfoDelayTable[8] = {
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0xffff, 0x0419, 0x020c, 0x015e, 0x0100, 0x0100, 0x0100, 0x0100};
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@ -25,7 +25,7 @@
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static inline float poly3blep0(float t) {
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float t2 = t * t;
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return 2*( t * t2 - 0.5f * t2 * t2);
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return 2 * (t * t2 - 0.5f * t2 * t2);
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}
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static inline float poly3blep1(float t) {
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@ -35,16 +35,16 @@ static inline float poly3blep1(float t) {
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Voice::Voice() {
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omega = 0.0;
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theta = 0.0;
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amp = 0;
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env = 0;
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}
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void Voice::on(uint8_t note) {
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omega = 261.63 * powf(2, (note - 60) / 12.0f) / 48000.0f;
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amp = 1;
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envPhase = 1;
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}
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void Voice::off() {
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amp = 0;
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envPhase = 0;
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}
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void Voice::run(Module* m, float* buffer, uint32_t samples) {
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@ -53,8 +53,8 @@ void Voice::run(Module* m, float* buffer, uint32_t samples) {
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// printf("%f ", delay);
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m->saw = 1;
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m->square=1;
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m->sub=.5;
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m->square = 1;
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m->sub = .5;
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m->pw = 0.5;
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for (uint32_t i = 0; i < samples; i++) {
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@ -92,7 +92,7 @@ void Voice::run(Module* m, float* buffer, uint32_t samples) {
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delay += m->sub * subosc;
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// delay += (1-(m->noisegen/(float)(1<<30))) * m->noise; FIXME figure out what to do about noise
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buffer[i] += 0.125 * amp * out;
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buffer[i] += 0.125 * env * out;
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lastpw = m->pw;
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}
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// buffer[0] += 1;
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