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 +1,28 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.IdHeader = void 0;
+const Token = require("token-types");
+/**
+ * Opus ID Header parser
+ * Ref: https://wiki.xiph.org/OggOpus#ID_Header
+ */
+class IdHeader {
+    constructor(len) {
+        this.len = len;
+        if (len < 19) {
+            throw new Error("ID-header-page 0 should be at least 19 bytes long");
+        }
+    }
+    get(buf, off) {
+        return {
+            magicSignature: new Token.StringType(8, 'ascii').get(buf, off + 0),
+            version: buf.readUInt8(off + 8),
+            channelCount: buf.readUInt8(off + 9),
+            preSkip: buf.readInt16LE(off + 10),
+            inputSampleRate: buf.readInt32LE(off + 12),
+            outputGain: buf.readInt16LE(off + 16),
+            channelMapping: buf.readUInt8(off + 18)
+        };
+    }
+}
+exports.IdHeader = IdHeader;