87 lines
2.0 KiB
C++
87 lines
2.0 KiB
C++
/*
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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 <cstdint>
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//uint16_t attack_table[128];
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//uint16_t decay_table[128];
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class Synth;
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class Patch {
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public:
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float saw=1, sqr, sub;
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uint16_t attack=0x1ff, decay=0x1ff, sustain=0x1000, release=0x1ff;
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};
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class Voice {
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public:
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// uint8_t note = 72;
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uint8_t note = 60;
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void on(uint32_t key, bool reset);
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void off();
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bool isFree();
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void run(Synth &s, float *buffer, uint32_t samples);
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void gate(Synth &s);
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private:
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enum { ATTACK,
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DECAY,
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SUSTAIN,
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RELEASE } envState = RELEASE;
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enum { K_OFF,
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K_WAIT,
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K_ON,
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K_SUSTAIN } keyState = K_OFF;
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bool ff00; // reset bit
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bool ff07; // status bit
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bool ff08; // set to indicate attack phase complete
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bool ff10; // note on bit
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bool ff11; // sustain flag
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bool ff33; // releasing flag
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uint16_t env;
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float phase = 0, omega = 260 / 48000.0, subosc = 1;
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// float env, target;
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float delay;
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uint8_t pulseStage = 0;
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float pw_rc = 0;
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float vr58c106 = 0;
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};
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class Synth {
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public:
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Patch patch;
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Voice voice[8];
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float lfo = 0, lfosw = 0.01;
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float lastpw = 0;
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uint32_t blockLeft;
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uint32_t framesLeft = 0;
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};
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