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refactor: cache optional runtime imports

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This commit is contained in:
Peter Steinberger
2026-04-18 20:43:11 +01:00
parent 6d40de45c7
commit 0195da6b0e
8 changed files with 93 additions and 21 deletions
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11
extensions/qqbot/src/utils/audio-convert.ts
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@@ -728,10 +728,19 @@ function ffmpegToPCM(
});
}
type MpegDecoderConstructor = typeof import("mpg123-decoder").MPEGDecoder;
let mpegDecoderConstructorPromise: Promise<MpegDecoderConstructor> | null = null;
async function loadMpegDecoderConstructor(): Promise<MpegDecoderConstructor> {
mpegDecoderConstructorPromise ??= import("mpg123-decoder").then(({ MPEGDecoder }) => MPEGDecoder);
return mpegDecoderConstructorPromise;
}
/** Decode MP3 into PCM through mpg123-decoder when ffmpeg is unavailable. */
async function wasmDecodeMp3ToPCM(buf: Buffer, targetRate: number): Promise<Buffer | null> {
try {
const { MPEGDecoder } = await import("mpg123-decoder");
const MPEGDecoder = await loadMpegDecoderConstructor();
debugLog(`[audio-convert] WASM MP3 decode: size=${buf.length} bytes`);
const decoder = new MPEGDecoder();
await decoder.ready;