init commit

remotion/node_modules/@remotion/media-parser/dist/metadata/metadata-from-matroska.js

@@ -0,0 +1,53 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.getMetadataFromMatroska = void 0;
+const traversal_1 = require("../containers/webm/traversal");
+const removeEndZeroes = (value) => {
+    return value.endsWith('\u0000') ? removeEndZeroes(value.slice(0, -1)) : value;
+};
+const parseSimpleTagIntoEbml = (children, trackId) => {
+    const tagName = children.find((c) => c.type === 'TagName');
+    const tagString = children.find((c) => c.type === 'TagString');
+    if (!tagName || !tagString) {
+        return null;
+    }
+    return {
+        trackId,
+        key: tagName.value.toLowerCase(),
+        value: removeEndZeroes(tagString.value),
+    };
+};
+const getMetadataFromMatroska = (structure) => {
+    var _a;
+    const entries = [];
+    for (const segment of structure.boxes) {
+        if (segment.type !== 'Segment') {
+            continue;
+        }
+        const tags = segment.value.filter((s) => s.type === 'Tags');
+        for (const tag of tags) {
+            for (const child of tag.value) {
+                if (child.type !== 'Tag') {
+                    continue;
+                }
+                let trackId = null;
+                const target = child.value.find((c) => c.type === 'Targets');
+                if (target) {
+                    const tagTrackId = (_a = target.value.find((c) => c.type === 'TagTrackUID')) === null || _a === void 0 ? void 0 : _a.value;
+                    if (tagTrackId) {
+                        trackId = (0, traversal_1.getTrackWithUid)(segment, tagTrackId);
+                    }
+                }
+                const simpleTags = child.value.filter((s) => s.type === 'SimpleTag');
+                for (const simpleTag of simpleTags) {
+                    const parsed = parseSimpleTagIntoEbml(simpleTag.value, trackId);
+                    if (parsed) {
+                        entries.push(parsed);
+                    }
+                }
+            }
+        }
+    }
+    return entries;
+};
+exports.getMetadataFromMatroska = getMetadataFromMatroska;