28 lines
1.4 KiB
JavaScript
28 lines
1.4 KiB
JavaScript
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// Audio the host app supplied survives every pass that rebuilds audio_meta.json from the storyboard: an entry
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// marked "source": "host" whose file exists. A frame the host scored takes no looked-up cue sound.
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/** The host's own entries in an earlier audio_meta.json, and why any other host-marked entry was dropped; `exists`
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* resolves a path from the project root. A frame written as "1" is frame 1. */
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export function hostAudio(previous, exists) {
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const marked = [[previous?.bgm, "path"], ...(previous?.sfx ?? []).map((s) => [s, "file"])].filter(
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([entry]) => entry?.source === "host",
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);
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const kept = new Set();
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const dropped = [];
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for (const [entry, key] of marked) {
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const path = entry[key];
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if (typeof path !== "string") dropped.push(`a host entry has no "${key}"`);
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else if (!exists(path)) dropped.push(`${path} is not on disk`);
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else kept.add(entry);
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}
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const bgm = kept.has(previous?.bgm) ? previous.bgm : null;
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const sfx = (previous?.sfx ?? [])
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.filter((s) => kept.has(s))
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.map((s) => ({ ...s, frame: Number(s.frame) }));
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return { bgm, sfx, frames: new Set(sfx.map((s) => s.frame)), dropped };
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}
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/** `rebuilt` with the host's bed and sounds put back; the host's bed wins over a looked-up one. */
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export function keepHostAudio(rebuilt, host) {
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const looked = (rebuilt.sfx ?? []).filter((s) => !host.frames.has(s.frame));
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return { ...rebuilt, bgm: host.bgm ?? rebuilt.bgm, sfx: [...host.sfx, ...looked] };
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}
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