First release

node_modules/@videojs/vhs-utils/cjs/id3-helpers.js

@@ -0,0 +1,51 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.getId3Offset = exports.getId3Size = void 0;
+
+var _byteHelpers = require("./byte-helpers.js");
+
+var ID3 = (0, _byteHelpers.toUint8)([0x49, 0x44, 0x33]);
+
+var getId3Size = function getId3Size(bytes, offset) {
+  if (offset === void 0) {
+    offset = 0;
+  }
+
+  bytes = (0, _byteHelpers.toUint8)(bytes);
+  var flags = bytes[offset + 5];
+  var returnSize = bytes[offset + 6] << 21 | bytes[offset + 7] << 14 | bytes[offset + 8] << 7 | bytes[offset + 9];
+  var footerPresent = (flags & 16) >> 4;
+
+  if (footerPresent) {
+    return returnSize + 20;
+  }
+
+  return returnSize + 10;
+};
+
+exports.getId3Size = getId3Size;
+
+var getId3Offset = function getId3Offset(bytes, offset) {
+  if (offset === void 0) {
+    offset = 0;
+  }
+
+  bytes = (0, _byteHelpers.toUint8)(bytes);
+
+  if (bytes.length - offset < 10 || !(0, _byteHelpers.bytesMatch)(bytes, ID3, {
+    offset: offset
+  })) {
+    return offset;
+  }
+
+  offset += getId3Size(bytes, offset); // recursive check for id3 tags as some files
+  // have multiple ID3 tag sections even though
+  // they should not.
+
+  return getId3Offset(bytes, offset);
+};
+
+exports.getId3Offset = getId3Offset;