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Fix the problem where the internal volume of decoded wave are reduced by 0.5x.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,88 @@ | ||
| import Mucom88, { MucomStatusType } from "mucom88-js"; | ||
|
|
||
| export async function loadAsset(url: string): Promise<Uint8Array> { | ||
| const res = await fetch(new URL(url, import.meta.url)); | ||
| return new Uint8Array(await res.arrayBuffer()); | ||
| } | ||
|
|
||
| const maxDuration = 60 * 1000 * 10; | ||
| const defaultFadeDuration = 5 * 1000; | ||
|
|
||
| export class Fader { | ||
| durationInFrame = 0; | ||
| fadeDurationInFrame = 0; | ||
| fadeStartFrame?: number | null; | ||
| timeTagValue?: number | null; | ||
| maxCount = 0; | ||
|
|
||
| setup( | ||
| mucom: Mucom88, | ||
| sampleRate: number, | ||
| timeTagValue?: number | null, | ||
| fadeTagValue?: number | null | ||
| ) { | ||
| this.timeTagValue = timeTagValue; | ||
| if (this.timeTagValue != null) { | ||
| const duration = Math.min(60 * 20 * 1000, this.timeTagValue * 1000); | ||
| this.durationInFrame = Math.floor((sampleRate * duration) / 1000); | ||
| } else { | ||
| this.durationInFrame = Math.floor((sampleRate * maxDuration) / 1000); | ||
| } | ||
| this.fadeDurationInFrame = Math.floor( | ||
| sampleRate * (fadeTagValue ?? defaultFadeDuration / 1000) | ||
| ); | ||
| this.fadeStartFrame = null; | ||
|
|
||
| const { maxCount, hasGlobalLoop } = mucom.getCountData(); | ||
| this.maxCount = maxCount; | ||
|
|
||
| if (!hasGlobalLoop) { | ||
| this.fadeDurationInFrame = 0; | ||
| } | ||
| } | ||
|
|
||
| updateFadeState(currentFrame: number, mucom: Mucom88) { | ||
| if (this.fadeStartFrame == null) { | ||
| if (currentFrame >= this.durationInFrame - this.fadeDurationInFrame) { | ||
| this.fadeStartFrame = currentFrame; | ||
| } | ||
| if (this.timeTagValue == null) { | ||
| const curCount = mucom.getStatus(MucomStatusType.INTCOUNT); | ||
| if (this.maxCount <= curCount) { | ||
| this.fadeStartFrame = currentFrame; | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
|
||
| getValue(currentFrame: number): number { | ||
| if (this.fadeStartFrame != null) { | ||
| const elapsed = currentFrame - this.fadeStartFrame; | ||
| return Math.min( | ||
| 1.0, | ||
| Math.max( | ||
| 0, | ||
| (this.fadeDurationInFrame - elapsed) / this.fadeDurationInFrame | ||
| ) | ||
| ); | ||
| } | ||
| return 1.0; | ||
| } | ||
| } | ||
|
|
||
| export function getTimeFadeTagValue(mml: string): { | ||
| time: number | null; | ||
| fade: number | null; | ||
| } { | ||
| const matches = mml.matchAll(/^#(time|fade)\s+([0-9]+).*$/gm); | ||
| let time = null; | ||
| let fade = null; | ||
| for (const match of matches) { | ||
| if (match[1] == "time") { | ||
| time = parseInt(match[2]); | ||
| } else { | ||
| fade = parseInt(match[2]); | ||
| } | ||
| } | ||
| return { time, fade }; | ||
| } |
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