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configurable wavetable files

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This commit is contained in:
Bliblank
2026-02-07 18:08:38 -06:00
parent 8b4a09fc39
commit 18ff8dfc9f
6 changed files with 62 additions and 37 deletions
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42
src/synth/WavetableController.cpp
View File

@@ -16,46 +16,26 @@ WavetableController::WavetableController() {
void WavetableController::init() {
// find number of wavetable files
// find wavetable files
std::vector<std::filesystem::path> wavetableFiles;
for(std::filesystem::directory_entry entry : std::filesystem::directory_iterator(wavetablesRoot_)) {
if(std::filesystem::is_regular_file(entry.status())) {
wavetableFiles.push_back(entry.path());
}
}
uint32_t wavetableCount = wavetableFiles.size();
wavetables_.resize(wavetableCount);
wavetables_.resize(4); // resize for however many files we find
// wavetable file structure is best explained in scripts/generate_wavetable.py
// read the wavetable file
std::ifstream inputFile("config/wavetables/sine.wt", std::ios::in | std::ios::binary);
if(!inputFile) std::cout << "error opening file" << std::endl;
inputFile.read(reinterpret_cast<char*>(wavetables_[0].data()), SYNTH_WAVETABLE_SIZE * sizeof(float));
float phase = 0.0f;
float phaseInc = 2.0f * M_PI / static_cast<float>(SYNTH_WAVETABLE_SIZE);
for(int i = 0; i < SYNTH_WAVETABLE_SIZE; i++) {
//wavetables_[0][i] = std::sin(phase) / 0.707f; // sine
wavetables_[1][i] = (phase >= M_PI) ? 1.0f : -1.0f; // square
wavetables_[2][i] = ((phase / M_PI) - 1.0f) / 0.577f; // saw
// triangle
float tri = 0.0f;
if(phase <= M_PI/2.0f) {
tri = phase * 2.0f/M_PI;
} else if(phase <= 3.0f*M_PI/2.0f) {
tri = phase * -2.0f/M_PI + 2.0f;
} else {
tri = phase * 2.0f/M_PI - 4.0f;
}
wavetables_[3][i] = tri / 0.577f;
phase += phaseInc;
// load the wavetable files
for(int i = 0; i < wavetableCount; i++) {
std::cout << "loading wavetable file [" << i << "]: " << wavetableFiles[i] << std::endl;
std::ifstream inputFile(wavetableFiles[i], std::ios::in | std::ios::binary);
if(!inputFile) std::cout << "error opening file" << std::endl;
inputFile.read(reinterpret_cast<char*>(wavetables_[i].data()), SYNTH_WAVETABLE_SIZE * sizeof(float));
}
// wavetable data structure is best explained in scripts/generate_wavetable.py
}
float WavetableController::sample(uint8_t wavetableIndex, float phase) {

11
src/ui/MainWindow.cpp
View File

@@ -48,6 +48,17 @@ MainWindow::MainWindow(QWidget *parent) :
this, [this](int index) {
audio_->parameters()->set(ParamId::Osc1WaveSelector2, index);
});
ui_->comboOsc1WaveSelector1->clear();
ui_->comboOsc1WaveSelector2->clear();
for(std::filesystem::directory_entry entry : std::filesystem::directory_iterator("config/wavetables")) {
if(std::filesystem::is_regular_file(entry.status())) {
std::string fileName = entry.path().string().substr(18);
fileName.erase(fileName.length() - 3);
ui_->comboOsc1WaveSelector1->addItem(QString::fromStdString(fileName));
ui_->comboOsc1WaveSelector2->addItem(QString::fromStdString(fileName));
}
}
// rogue sliders, TODO: clean these up in a package
connect(ui_->sliderMasterOctave, &SmartSlider::valueChanged,