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Removed latency calculation

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This commit is contained in:
Miika Alonen
2023-08-30 00:21:50 +03:00
parent 287fdbbad4
commit f8a0a8e6f5
5 changed files with 62 additions and 123 deletions
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79
src/TransportNode.js
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@ -8,17 +8,6 @@ export class TransportNode extends AudioWorkletNode {
this.app = application
this.port.addEventListener("message", this.handleMessage);
this.port.start();
/** @type {HTMLSpanElement} */
this.$clock = document.getElementById("clockviewer");
this.currentPulsePosition = 0;
this.executionLatency = 0;
this.lastLatencies = [
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
];
this.indexOfLastLatencies = 0;
this.logicalTime = 0;
}
@ -26,25 +15,26 @@ export class TransportNode extends AudioWorkletNode {
handleMessage = (message) => {
if (message.data && message.data.type === "bang") {
this.logicalTime = message.data.logicalTime;
this.app.clock.tick++
let futureTimeStamp = this.convertTicksToTimeposition(this.app.clock.tick);
console.log("BANG", this.logicalTime, futureTimeStamp);
setTimeout(() => {
console.log("EVALUATING");
const now = this.app.audioContext.currentTime;
this.app.clock.time_position = futureTimeStamp;
tryEvaluate(this.app, this.app.global_buffer);
const then = this.app.audioContext.currentTime;
this.lastLatencies[this.indexOfLastLatencies] = then - now;
this.indexOfLastLatencies = (this.indexOfLastLatencies + 1) % this.lastLatencies.length;
const averageLatency = this.lastLatencies.reduce((a, b) => a + b) / this.lastLatencies.length;
this.executionLatency = averageLatency / 1000;
}, (this.app.clock.pulse_duration + this.executionLatency) * 1000);
// console.log("BANG", this.logicalTime, futureTimeStamp);
this.app.clock.time_position = futureTimeStamp;
tryEvaluate(this.app, this.app.global_buffer);
}
};
convertTicksToTimeposition(ticks) {
const beatsPerBar = this.app.clock.time_signature[0];
const ppqnPosition = (ticks % this.app.clock.ppqn)+1;
const beatNumber = Math.floor(ticks / this.app.clock.ppqn);
const barNumber = Math.floor(beatNumber / beatsPerBar)+1;
const beatWithinBar = Math.floor(beatNumber % beatsPerBar)+1;
this.app.clock.tick++
return {bar: barNumber, beat: beatWithinBar, pulse: ppqnPosition};
}
start() {
this.port.postMessage("start");
}
@ -62,46 +52,7 @@ export class TransportNode extends AudioWorkletNode {
}
stop() {
this.app.clock.tick = 0;
// this.$clock.innerHTML = `[${1} | ${1} | ${zeroPad(1, '2')}]`;
this.port.postMessage("stop");
}
convertTimeToBarsBeats(currentTime) {
const beatDuration = 60 / this.app.clock.bpm;
const beatNumber = (currentTime) / beatDuration;
const beatsPerBar = this.app.clock.time_signature[0];
const barNumber = Math.floor(beatNumber / beatsPerBar) + 1;
const beatWithinBar = Math.floor(beatNumber % beatsPerBar) + 1;
const ppqnPosition = Math.floor((beatNumber % 1) * this.app.clock.ppqn);
this.app.clock.tick++
return { bar: barNumber, beat: beatWithinBar, ppqn: ppqnPosition };
}
convertTimeToNextBarsBeats(currentTime) {
const beatDuration = 60 / this.app.clock.bpm;
const beatNumber = (currentTime) / beatDuration;
const beatsPerBar = this.app.clock.time_signature[0];
this.currentPulsePosition = beatNumber * this.app.clock.ppqn;
const nextPulsePosition = Math.ceil(this.currentPulsePosition);
const timeToNextPulse = this.app.clock.convertPulseToSecond(this.nextPulsePosition - this.currentPulsePosition);
const futureBeatNumber = this.nextPulsePosition / this.app.clock.ppqn;
const futureBarNumber = futureBeatNumber / beatsPerBar;
}
convertTicksToTimeposition(ticks) {
const beatsPerBar = this.app.clock.time_signature[0];
const ppqnPosition = (ticks % this.app.clock.ppqn)+1;
const beatNumber = Math.floor(ticks / this.app.clock.ppqn);
const barNumber = Math.floor(beatNumber / beatsPerBar)+1;
const beatWithinBar = Math.floor(beatNumber % beatsPerBar)+1;
return {bar: barNumber, beat: beatWithinBar, pulse: ppqnPosition};
}
}