133 lines
3.6 KiB
TypeScript
133 lines
3.6 KiB
TypeScript
/// <reference no-default-lib="true" />
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/// <reference lib="esnext" />
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/// <reference lib="webworker" />
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import type { FFmpegCoreModule, FFmpegCoreModuleFactory } from "@ffmpeg/types";
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import type {
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FFMessageEvent,
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FFMessageLoadConfig,
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FFMessageWriteFileData,
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FFMessageExecData,
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FFMessageReadFileData,
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CallbackData,
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IsFirst,
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IsDone,
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ExitCode,
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} from "./types";
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import { toBlobURL } from "./utils";
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import {
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CORE_URL,
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FFMessageType,
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MIME_TYPE_JAVASCRIPT,
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MIME_TYPE_WASM,
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} from "./const";
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import { ERROR_UNKNOWN_MESSAGE_TYPE, ERROR_NOT_LOADED } from "./errors";
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declare global {
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interface WorkerGlobalScope {
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createFFmpegCore: FFmpegCoreModuleFactory;
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}
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}
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let ffmpeg: FFmpegCoreModule;
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const load = async ({
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coreURL: _coreURL = CORE_URL,
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wasmURL: _wasmURL,
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workerURL: _workerURL,
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blob = true,
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thread = false,
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}: FFMessageLoadConfig): Promise<IsFirst> => {
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const first = !ffmpeg;
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let coreURL = _coreURL;
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let wasmURL = _wasmURL ? _wasmURL : _coreURL.replace(/.js$/g, ".wasm");
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let workerURL = _workerURL
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? _workerURL
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: _coreURL.replace(/.js$/g, ".worker.js");
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if (blob) {
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coreURL = await toBlobURL(coreURL, MIME_TYPE_JAVASCRIPT, (data) =>
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self.postMessage({ type: FFMessageType.DOWNLOAD, data })
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);
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wasmURL = await toBlobURL(wasmURL, MIME_TYPE_WASM, (data) =>
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self.postMessage({ type: FFMessageType.DOWNLOAD, data })
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);
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if (thread) {
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try {
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workerURL = await toBlobURL(workerURL, MIME_TYPE_JAVASCRIPT, (data) =>
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self.postMessage({ type: FFMessageType.DOWNLOAD, data })
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);
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// eslint-disable-next-line
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} catch (e) {}
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}
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}
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importScripts(coreURL);
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ffmpeg = await (self as WorkerGlobalScope).createFFmpegCore({
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// Fixed `Overload resolution failed.` when using multi-threaded ffmpeg-core.
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mainScriptUrlOrBlob: coreURL,
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locateFile: (path: string, prefix: string): string => {
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if (path.endsWith(".wasm")) return wasmURL;
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if (path.endsWith(".worker.js")) return workerURL;
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return prefix + path;
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},
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});
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ffmpeg.setLogger((data) =>
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self.postMessage({ type: FFMessageType.LOG, data })
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);
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ffmpeg.setProgress((data: number) =>
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self.postMessage({ type: FFMessageType.PROGRESS, data })
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);
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return first;
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};
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const writeFile = ({ path, bin }: FFMessageWriteFileData): IsDone => {
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ffmpeg.FS.writeFile(path, bin);
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return true;
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};
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const exec = ({ args, timeout = -1 }: FFMessageExecData): ExitCode => {
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ffmpeg.setTimeout(timeout);
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ffmpeg.exec(...args);
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const ret = ffmpeg.ret;
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ffmpeg.reset();
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return ret;
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};
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const readFile = ({ path }: FFMessageReadFileData): Uint8Array =>
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ffmpeg.FS.readFile(path);
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self.onmessage = async ({
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data: { id, type, data: _data },
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}: FFMessageEvent): Promise<void> => {
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const trans = [];
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let data: CallbackData;
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try {
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if (type !== FFMessageType.LOAD && !ffmpeg) throw ERROR_NOT_LOADED;
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switch (type) {
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case FFMessageType.LOAD:
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data = await load(_data as FFMessageLoadConfig);
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break;
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case FFMessageType.WRITE_FILE:
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data = writeFile(_data as FFMessageWriteFileData);
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break;
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case FFMessageType.EXEC:
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data = exec(_data as FFMessageExecData);
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break;
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case FFMessageType.READ_FILE:
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data = readFile(_data as FFMessageReadFileData);
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break;
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default:
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throw ERROR_UNKNOWN_MESSAGE_TYPE;
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}
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} catch (e) {
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self.postMessage({ id, type: FFMessageType.ERROR, data: e as Error });
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return;
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}
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if (data instanceof Uint8Array) {
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trans.push(data.buffer);
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}
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self.postMessage({ id, type, data }, trans);
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};
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