Initial working version

2022-12-22 20:22:22 +11:00
parent ce9675a1cc
commit ced7fa5092
902 changed files with 150252 additions and 0 deletions
@@ -0,0 +1,31 @@
+"use strict";
+/**
+ * Extended Lame Header
+ */
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.ExtendedLameHeader = void 0;
+const Token = require("token-types");
+const common = require("../common/Util");
+const ReplayGainDataFormat_1 = require("./ReplayGainDataFormat");
+/**
+ * Info Tag
+ * @link http://gabriel.mp3-tech.org/mp3infotag.html
+ * @link https://github.com/quodlibet/mutagen/blob/abd58ee58772224334a18817c3fb31103572f70e/mutagen/mp3/_util.py#L112
+ */
+exports.ExtendedLameHeader = {
+    len: 27,
+    get: (buf, off) => {
+        const track_peak = Token.UINT32_BE.get(buf, off + 2);
+        return {
+            revision: common.getBitAllignedNumber(buf, off, 0, 4),
+            vbr_method: common.getBitAllignedNumber(buf, off, 4, 4),
+            lowpass_filter: 100 * Token.UINT8.get(buf, off + 1),
+            track_peak: track_peak === 0 ? undefined : track_peak / Math.pow(2, 23),
+            track_gain: ReplayGainDataFormat_1.ReplayGain.get(buf, 6),
+            album_gain: ReplayGainDataFormat_1.ReplayGain.get(buf, 8),
+            music_length: Token.UINT32_BE.get(buf, off + 20),
+            music_crc: Token.UINT8.get(buf, off + 24),
+            header_crc: Token.UINT16_BE.get(buf, off + 24)
+        };
+    }
+};