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forked from um/web
web/src/decrypt/raw.ts

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import {AudioMimeType, GetArrayBuffer, GetCoverFromFile, GetMetaFromFile, SniffAudioExt} from "@/decrypt/utils.ts";
import {DecryptResult} from "@/decrypt/entity";
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import {parseBlob as metaParseBlob} from "music-metadata-browser";
export async function Decrypt(file: Blob, raw_filename: string, raw_ext: string, detect: boolean = true)
: Promise<DecryptResult> {
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let ext = raw_ext;
if (detect) {
const buffer = new Uint8Array(await GetArrayBuffer(file));
ext = SniffAudioExt(buffer, raw_ext);
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if (ext !== raw_ext) file = new Blob([buffer], {type: AudioMimeType[ext]})
}
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const tag = await metaParseBlob(file);
const {title, artist} = GetMetaFromFile(raw_filename, tag.common.title, tag.common.artist)
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return {
title,
artist,
ext,
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album: tag.common.album,
picture: GetCoverFromFile(tag),
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file: URL.createObjectURL(file),
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blob: file,
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mime: AudioMimeType[ext]
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}
}