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make filter nodes conditional

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This commit is contained in:
Vasilii Milovidov
2023-09-19 12:26:35 +04:00
parent 12d8e22b46
commit c8270a98e9
1 changed files with 44 additions and 33 deletions
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src-tauri/src/superdough.rs
+44 -33
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@@ -58,16 +58,25 @@ pub fn superdough(message: &WebAudioMessage, context: &mut AudioContext) {
let env = context.create_gain();
env.gain().set_value(0.);
env.connect(&context.destination());
// let (lpf, hpf, bandpass) = create_filters(context, message);
let filters = create_filters(context, message);
let connect_filter_nodes = |node: &dyn AudioNode, filters: &Vec<BiquadFilterNode>, env: &GainNode| {
if let Some(first_filter) = filters.first() {
if let Some(last_filter) = filters.last() {
node.connect(first_filter);
last_filter.connect(env);
}
} else {
node.connect(env);
}
};
match message.waveform.as_str() {
"sine" | "square" | "triangle" | "saw" => {
let osc = context.create_oscillator();
osc.set_type(create_osc_type(&message));
osc.frequency().set_value(message.note);
osc.connect(filters.get(0).unwrap());
connect_filters_to_envelope(&env, message, filters.get(1).unwrap(), filters.get(2).unwrap());
connect_filter_nodes(&osc, &filters, &env);
osc.start_at(now);
apply_adsr(&env, message, now);
for f in filters {
@@ -82,13 +91,7 @@ pub fn superdough(message: &WebAudioMessage, context: &mut AudioContext) {
let audio_buffer_duration = audio_buffer.duration();
let src = context.create_buffer_source();
src.set_buffer(audio_buffer);
src.connect(filters.get(0).unwrap());
connect_filters_to_envelope(
&env,
message,
filters.get(1).unwrap(),
filters.get(2).unwrap(),
);
connect_filter_nodes(&src, &filters, &env);
src.playback_rate().set_value(message.speed);
if message.looper.is_loop > 0 {
@@ -134,34 +137,42 @@ fn create_osc_type(message: &WebAudioMessage) -> OscillatorType {
}
}
fn create_filters(context: &mut AudioContext, message: &WebAudioMessage) -> [BiquadFilterNode; 3] {
let lpf = context.create_biquad_filter();
lpf.set_type(Lowpass);
fn create_filters(context: &mut AudioContext, message: &WebAudioMessage) -> Vec<BiquadFilterNode> {
let mut filters = Vec::new();
lpf.q().set_value(message.lpf.resonance);
let hpf = context.create_biquad_filter();
hpf.set_type(Highpass);
hpf.frequency().set_value(message.hpf.frequency);
hpf.q().set_value(message.hpf.resonance);
let bpf = context.create_biquad_filter();
bpf.set_type(Bandpass);
lpf.connect(&hpf);
[lpf, hpf, bpf]
}
fn connect_filters_to_envelope(envelope: &GainNode, message: &WebAudioMessage, hpf: &BiquadFilterNode, bpf: &BiquadFilterNode) {
if message.bpf.frequency > 0.0 {
let bpf = context.create_biquad_filter();
bpf.set_type(Bandpass);
bpf.frequency().set_value(message.bpf.frequency);
bpf.q().set_value(message.bpf.resonance);
hpf.connect(bpf);
bpf.connect(envelope);
} else {
hpf.connect(envelope);
filters.push(bpf);
} else if message.lpf.frequency > 0.0 && message.hpf.frequency > 0.0 {
let lpf = context.create_biquad_filter();
let hpf = context.create_biquad_filter();
lpf.set_type(Lowpass);
lpf.frequency().set_value(message.lpf.frequency);
lpf.q().set_value(message.lpf.resonance);
hpf.set_type(Highpass);
hpf.frequency().set_value(message.hpf.frequency);
hpf.q().set_value(message.hpf.resonance);
lpf.connect(&hpf);
filters.push(lpf);
filters.push(hpf);
} else if message.lpf.frequency > 0.0 {
let lpf = context.create_biquad_filter();
lpf.set_type(Lowpass);
lpf.frequency().set_value(message.lpf.frequency);
lpf.q().set_value(message.lpf.resonance);
filters.push(lpf);
} else if message.hpf.frequency > 0.0 {
let hpf = context.create_biquad_filter();
hpf.set_type(Highpass);
hpf.frequency().set_value(message.hpf.frequency);
hpf.q().set_value(message.hpf.resonance);
filters.push(hpf);
}
filters
}
fn apply_adsr(envelope: &GainNode, message: &WebAudioMessage, now: f64) {