Gordonjcp/chassis
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notes

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This commit is contained in:
Gordon JC Pearce 2024-09-02 22:52:53 +01:00
parent ff3cb82c85
commit 284ce7193c
2 changed files with 68 additions and 13 deletions
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73
plugin/chassis.cpp
View File

@ -18,7 +18,6 @@
#include "chassis.hpp" #include "chassis.hpp"
SVF::SVF(float cutoff = 0, float q = 0, float samplerate = 0) { SVF::SVF(float cutoff = 0, float q = 0, float samplerate = 0) {
z1 = z2 = 0; z1 = z2 = 0;
setFreq(cutoff, q, samplerate); setFreq(cutoff, q, samplerate);
@ -51,14 +50,14 @@ inline float SVF::lpStep(float in) {
START_NAMESPACE_DISTRHO START_NAMESPACE_DISTRHO
Chassis::Chassis() : Plugin(kParameterCount, 0, 0) { // one parameter, no programs, no states Chassis::Chassis() : Plugin(kParameterCount, 0, 0) { // one parameter, no programs, no states
//lowpass = new float[getBufferSize()]; // lowpass = new float[getBufferSize()];
//ram = new int16_t[16384]; // ram = new int16_t[16384];
//bzero(lowpass, sizeof(float) * getBufferSize()); // bzero(lowpass, sizeof(float) * getBufferSize());
//bzero(ram, sizeof(int16_t) * 16384); // bzero(ram, sizeof(int16_t) * 16384);
//f1.setFreq(5916, .6572, getSampleRate()); // f1.setFreq(5916, .6572, getSampleRate());
// f2.setFreq(9458, 2.536, getSampleRate()); // f2.setFreq(9458, 2.536, getSampleRate());
} }
// Initialisation functions // Initialisation functions
@ -96,12 +95,9 @@ void Chassis::initParameter(uint32_t index, Parameter &parameter) {
} }
void Chassis::setParameterValue(uint32_t index, float value) { void Chassis::setParameterValue(uint32_t index, float value) {
} }
float Chassis::getParameterValue(uint32_t index) const { float Chassis::getParameterValue(uint32_t index) const {
return 0; return 0;
} }
@ -127,17 +123,68 @@ void Chassis::loadProgram(uint32_t index) {
void Chassis::activate() { void Chassis::activate() {
// calculate filter coefficients // calculate filter coefficients
printf("called activate()\n"); printf("called activate()\n");
for (uint32_t i = 0; i< NUM_VOICES; i++ ) {
assign[i] = 0x80 | i;
}
} }
void Chassis::deactivate() { void Chassis::deactivate() {
// zero out the outputs, maybe // zero out the outputs, maybe
printf("called deactivate()\n"); printf("called deactivate()\n");
printf("%02x", assign[1]);
} }
void Chassis::noteOn(uint8_t note) {
for (uint32_t i = 0; i < NUM_VOICES; i++) {
printf("note on, finding free voice in %02x for %d\n", assign[i], note);
if (assign[i] & 0x80) { // top bit is voice free flag
assign[i] &= 0x7f; // enable
printf("voice %d would be set to note %d\n", assign[i], note);
break;
}
if (i == NUM_VOICES) { // didn't find a free voice
uint32_t v = assign[0];
memmove(assign, assign + 1, NUM_VOICES - 1); // shunt all voices down by one
assign[NUM_VOICES - 1] = v; // oldest voice goes at the top of the queue
printf("no free voices, reused %d for note %d\n", v, note);
}
}
printf("note table is now ");
for (uint32_t i=0; i < NUM_VOICES; i++ ) {
printf("%02x = ", assign[i]);
}
printf("----------------------------\n");
}
/*
void Chassis::noteOff(uint8_t note) {
uint32_t v;
printf("note off called for %3d\n", note);
for (uint32_t i = 0; i < NUM_VOICES; i++) {
v = assign[i];
printf("trying voice %02x\n", v);
if (v < 0x80) {
printf("note %02x is playing\n", v);
}
}
}
*/
void Chassis::run(const float **, float **outputs, uint32_t frames, const MidiEvent *MidiEvents, uint32_t midiEventCount) { void Chassis::run(const float **, float **outputs, uint32_t frames, const MidiEvent *MidiEvents, uint32_t midiEventCount) {
// actual effects here if (midiEventCount > 0) printf("\n--------------------\n");
for (uint32_t i = 0; i < midiEventCount; i++) {
printf("%4d %02x %02x\n", MidiEvents[i].frame, MidiEvents[i].data[0], MidiEvents[i].data[1]);
if (MidiEvents[i].data[0] == 0x90) {
noteOn(MidiEvents[i].data[1]);
}
}
} }
// create the plugin // create the plugin

8
plugin/chassis.hpp
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@ -19,6 +19,8 @@
#ifndef BARRVERB_HPP #ifndef BARRVERB_HPP
#define BARRVERB_HPP #define BARRVERB_HPP
#define NUM_VOICES 8
#include "DistrhoPlugin.hpp" #include "DistrhoPlugin.hpp"
class SVF { class SVF {
@ -70,7 +72,13 @@ class Chassis : public Plugin {
void deactivate() override; void deactivate() override;
void run(const float **, float **outputs, uint32_t frames, const MidiEvent *MidiEvents, uint32_t midiEventCount) override; void run(const float **, float **outputs, uint32_t frames, const MidiEvent *MidiEvents, uint32_t midiEventCount) override;
void noteOn(uint8_t note);
private: private:
uint8_t assign[NUM_VOICES]; // assigner table
DISTRHO_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR(Chassis); DISTRHO_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR(Chassis);
}; };