Initial commit: media-to-text app

ffmpeg-local/esm/worker.js

@@ -0,0 +1,161 @@
+/// <reference no-default-lib="true" />
+/// <reference lib="esnext" />
+/// <reference lib="webworker" />
+import { CORE_URL, FFMessageType } from "./const.js";
+import { ERROR_UNKNOWN_MESSAGE_TYPE, ERROR_NOT_LOADED, ERROR_IMPORT_FAILURE, } from "./errors.js";
+let ffmpeg;
+const load = async ({ coreURL: _coreURL, wasmURL: _wasmURL, workerURL: _workerURL, }) => {
+    const first = !ffmpeg;
+    try {
+        if (!_coreURL)
+            _coreURL = CORE_URL;
+        // when web worker type is `classic`.
+        importScripts(_coreURL);
+    }
+    catch {
+        if (!_coreURL || _coreURL === CORE_URL)
+            _coreURL = CORE_URL.replace('/umd/', '/esm/');
+        // when web worker type is `module`.
+        self.createFFmpegCore = (await import(
+        /* @vite-ignore */ _coreURL)).default;
+        if (!self.createFFmpegCore) {
+            throw ERROR_IMPORT_FAILURE;
+        }
+    }
+    const coreURL = _coreURL;
+    const wasmURL = _wasmURL ? _wasmURL : _coreURL.replace(/.js$/g, ".wasm");
+    const workerURL = _workerURL
+        ? _workerURL
+        : _coreURL.replace(/.js$/g, ".worker.js");
+    ffmpeg = await self.createFFmpegCore({
+        // Fix `Overload resolution failed.` when using multi-threaded ffmpeg-core.
+        // Encoded wasmURL and workerURL in the URL as a hack to fix locateFile issue.
+        mainScriptUrlOrBlob: `${coreURL}#${btoa(JSON.stringify({ wasmURL, workerURL }))}`,
+    });
+    ffmpeg.setLogger((data) => self.postMessage({ type: FFMessageType.LOG, data }));
+    ffmpeg.setProgress((data) => self.postMessage({
+        type: FFMessageType.PROGRESS,
+        data,
+    }));
+    return first;
+};
+const exec = ({ args, timeout = -1 }) => {
+    ffmpeg.setTimeout(timeout);
+    ffmpeg.exec(...args);
+    const ret = ffmpeg.ret;
+    ffmpeg.reset();
+    return ret;
+};
+const ffprobe = ({ args, timeout = -1 }) => {
+    ffmpeg.setTimeout(timeout);
+    ffmpeg.ffprobe(...args);
+    const ret = ffmpeg.ret;
+    ffmpeg.reset();
+    return ret;
+};
+const writeFile = ({ path, data }) => {
+    ffmpeg.FS.writeFile(path, data);
+    return true;
+};
+const readFile = ({ path, encoding }) => ffmpeg.FS.readFile(path, { encoding });
+// TODO: check if deletion works.
+const deleteFile = ({ path }) => {
+    ffmpeg.FS.unlink(path);
+    return true;
+};
+const rename = ({ oldPath, newPath }) => {
+    ffmpeg.FS.rename(oldPath, newPath);
+    return true;
+};
+// TODO: check if creation works.
+const createDir = ({ path }) => {
+    ffmpeg.FS.mkdir(path);
+    return true;
+};
+const listDir = ({ path }) => {
+    const names = ffmpeg.FS.readdir(path);
+    const nodes = [];
+    for (const name of names) {
+        const stat = ffmpeg.FS.stat(`${path}/${name}`);
+        const isDir = ffmpeg.FS.isDir(stat.mode);
+        nodes.push({ name, isDir });
+    }
+    return nodes;
+};
+// TODO: check if deletion works.
+const deleteDir = ({ path }) => {
+    ffmpeg.FS.rmdir(path);
+    return true;
+};
+const mount = ({ fsType, options, mountPoint }) => {
+    const str = fsType;
+    const fs = ffmpeg.FS.filesystems[str];
+    if (!fs)
+        return false;
+    ffmpeg.FS.mount(fs, options, mountPoint);
+    return true;
+};
+const unmount = ({ mountPoint }) => {
+    ffmpeg.FS.unmount(mountPoint);
+    return true;
+};
+self.onmessage = async ({ data: { id, type, data: _data }, }) => {
+    const trans = [];
+    let data;
+    try {
+        if (type !== FFMessageType.LOAD && !ffmpeg)
+            throw ERROR_NOT_LOADED; // eslint-disable-line
+        switch (type) {
+            case FFMessageType.LOAD:
+                data = await load(_data);
+                break;
+            case FFMessageType.EXEC:
+                data = exec(_data);
+                break;
+            case FFMessageType.FFPROBE:
+                data = ffprobe(_data);
+                break;
+            case FFMessageType.WRITE_FILE:
+                data = writeFile(_data);
+                break;
+            case FFMessageType.READ_FILE:
+                data = readFile(_data);
+                break;
+            case FFMessageType.DELETE_FILE:
+                data = deleteFile(_data);
+                break;
+            case FFMessageType.RENAME:
+                data = rename(_data);
+                break;
+            case FFMessageType.CREATE_DIR:
+                data = createDir(_data);
+                break;
+            case FFMessageType.LIST_DIR:
+                data = listDir(_data);
+                break;
+            case FFMessageType.DELETE_DIR:
+                data = deleteDir(_data);
+                break;
+            case FFMessageType.MOUNT:
+                data = mount(_data);
+                break;
+            case FFMessageType.UNMOUNT:
+                data = unmount(_data);
+                break;
+            default:
+                throw ERROR_UNKNOWN_MESSAGE_TYPE;
+        }
+    }
+    catch (e) {
+        self.postMessage({
+            id,
+            type: FFMessageType.ERROR,
+            data: e.toString(),
+        });
+        return;
+    }
+    if (data instanceof Uint8Array) {
+        trans.push(data.buffer);
+    }
+    self.postMessage({ id, type, data }, trans);
+};