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Clean up AudioEffects constructor (needs a refactor)

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Eric Rosenbaum committed 2019-07-22 16:05:08 -04:00
1 parent e74255cf10
commit d6f2b0a48a
1 file changed
+13 -9
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src/lib/audio/audio-effects.js
+13 -9
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@@ -33,29 +33,33 @@ class AudioEffects {
let sampleCount = buffer.length;
const affectedSampleCount = Math.floor((this.trimEndSeconds - this.trimStartSeconds) *
buffer.sampleRate);
let adjustedAffectedSampleCount = affectedSampleCount;
const unaffectedSampleCount = sampleCount - affectedSampleCount;
this.playbackRate = 1;
switch (name) {
case effectTypes.ECHO:
sampleCount = Math.max(sampleCount, Math.floor((this.trimEndSeconds + EchoEffect.TAIL_SECONDS) * buffer.sampleRate));
sampleCount = Math.max(sampleCount,
Math.floor((this.trimEndSeconds + EchoEffect.TAIL_SECONDS) * buffer.sampleRate));
break;
case effectTypes.FASTER:
this.playbackRate = pitchRatio;
sampleCount = unaffectedSampleCount + Math.floor(affectedSampleCount / this.playbackRate);
this.adjustedTrimEndSeconds = this.trimStartSeconds +
((affectedSampleCount / this.playbackRate) / buffer.sampleRate);
adjustedAffectedSampleCount = Math.floor(affectedSampleCount / this.playbackRate);
sampleCount = unaffectedSampleCount + adjustedAffectedSampleCount;
break;
case effectTypes.SLOWER:
this.playbackRate = 1 / pitchRatio;
sampleCount = unaffectedSampleCount + Math.floor(affectedSampleCount / this.playbackRate);
this.adjustedTrimEndSeconds = this.trimStartSeconds +
((affectedSampleCount / this.playbackRate) / buffer.sampleRate);
adjustedAffectedSampleCount = Math.floor(affectedSampleCount / this.playbackRate);
sampleCount = unaffectedSampleCount + adjustedAffectedSampleCount;
break;
}
this.adjustedTrimStart = this.adjustedTrimStartSeconds / (sampleCount / buffer.sampleRate);
this.adjustedTrimEnd = this.adjustedTrimEndSeconds / (sampleCount / buffer.sampleRate);
const durationSeconds = sampleCount / buffer.sampleRate;
this.adjustedTrimEndSeconds = this.trimStartSeconds +
(adjustedAffectedSampleCount / buffer.sampleRate);
this.adjustedTrimStart = this.adjustedTrimStartSeconds / durationSeconds;
this.adjustedTrimEnd = this.adjustedTrimEndSeconds / durationSeconds;
if (window.OfflineAudioContext) {
this.audioContext = new window.OfflineAudioContext(1, sampleCount, buffer.sampleRate);