141 lines
4.5 KiB
C++
141 lines
4.5 KiB
C++
/*
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Chassis softsynth 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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#include "chassis.hpp"
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START_NAMESPACE_DISTRHO
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Chassis::Chassis() : Plugin(kParameterCount, 0, 0) { // one parameter, no programs, no states
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}
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// Initialisation functions
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void Chassis::initParameter(uint32_t index, Parameter ¶meter) {
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}
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void Chassis::setParameterValue(uint32_t index, float value) {
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}
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float Chassis::getParameterValue(uint32_t index) const {
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return 0;
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}
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void Chassis::initAudioPort(bool input, uint32_t index, AudioPort &port) {
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port.groupId = kPortGroupStereo;
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Plugin::initAudioPort(input, index, port);
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if (!input && index == 0) port.name = "Left Out";
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if (!input && index == 1) port.name = "Right Out";
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}
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/*
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void Chassis::initProgramName(uint32_t index, String &programName) {
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programName = "init";
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}
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void Chassis::loadProgram(uint32_t index) {
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prog_offset = (index & 0x3f) << 7;
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program = index + 1;
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}
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*/
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// Processing functions
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void Chassis::activate() {
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// calculate filter coefficients
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printf("called activate()\n");
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}
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void Chassis::deactivate() {
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// zero out the outputs, maybe
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printf("called deactivate()\n");
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// printf("%02x", assign[1]);
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}
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void Chassis::noteOn(uint8_t note) {
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uint32_t i;
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for (i = 0; i < NUM_VOICES; i++) {
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// printf("note on, finding free voice in %02x for %d\n", assign[i], note);
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if (voice[i].isFree()) { // top bit is voice free flag
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voice[i].voiceOn(note);
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//printf("voice %d set to note %d\n", i, note);
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break;
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}
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}
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if (i == NUM_VOICES) { // didn't find a free voice
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// Voice v = voice[0];
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memmove(voice, voice + 1, sizeof(Voice) * (NUM_VOICES - 1)); // shunt all voices down by one
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// lessvoice[NUM_VOICES - 1] = v; // oldest voice goes at the top of the queue
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voice[NUM_VOICES - 1].voiceOn(note); // FIXME distinguish between restarting reused note and stolen note
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//printf("no free voices, note %d\n", 0, note);
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}
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/*
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printf("note table is now\n");
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for (i = 0; i < NUM_VOICES; i++) {
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printf("%2d = %3d %s\n", i, voice[i].note, voice[i].isFree()?"off":"on ");
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}
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printf("----------------------------\n");
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*/
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}
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void Chassis::noteOff(uint8_t note) {
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uint32_t v;
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//printf("note off called for %3d\n", note);
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//printf("trying voice ");
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for (uint32_t i = 0; i < NUM_VOICES; i++) {
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//printf("%02x ", i);
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if (voice[i].note == note && !voice[i].isFree()) {
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// printf("note off for %d playing %3d\n", i, note);
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//memmove(voice + i, voice + i + 1, sizeof(Voice) * (NUM_VOICES - i));
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voice[i].voiceOff();
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break;
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}
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}
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/*
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printf("\n note table is now\n");
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for (uint32_t i = 0; i < NUM_VOICES; i++) {
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printf("%2d = %3d %s\n", i, voice[i].note, voice[i].isFree()?"off":"on ");
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}*/
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}
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void Chassis::run(const float **, float **outputs, uint32_t frames, const MidiEvent *MidiEvents, uint32_t midiEventCount) {
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// if (midiEventCount > 0) printf("\n--------------------\n");
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for (uint32_t i = 0; i < midiEventCount; i++) {
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// printf("%4d %02x %02x\n", MidiEvents[i].frame, MidiEvents[i].data[0], MidiEvents[i].data[1]);
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if (MidiEvents[i].data[0] == 0x90) {
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noteOn(MidiEvents[i].data[1]);
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}
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if (MidiEvents[i].data[0] == 0x80) {
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noteOff(MidiEvents[i].data[1]);
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}
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}
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// run each synth voice
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bzero(outputs[0], sizeof(float)*frames);
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for (uint8_t i = 0; i < NUM_VOICES; i++) {
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voice[i].run(outputs[0], frames);
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}
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// copy left to right
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memmove(outputs[1], outputs[0], sizeof(float)*frames);
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}
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// create the plugin
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Plugin *createPlugin() { return new Chassis(); }
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END_NAMESPACE_DISTRHO
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