fix: ogg continued packet logic, see eshaz/wasm-audio-decoders#82

Author: eshaz

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "codec-parser",
-  "version": "2.4.0",
+  "version": "2.4.1",
   "description": "Library that parses raw data from audio codecs into frames containing data, header values, duration, and other information.",
   "main": "index.js",
   "types": "index.d.ts",
@@ -37,8 +37,8 @@
   "sideEffects": false,
   "homepage": "https://github.com/eshaz/codec-parser#readme",
   "devDependencies": {
-    "@types/jest": "^29.5.1",
+    "@types/jest": "^29.5.2",
     "jest": "^29.5.0",
-    "prettier": "^2.8.7"
+    "prettier": "^2.8.8"
   }
 }

package.json

@@ -126,22 +126,25 @@ export default class OggParser extends Parser {
       oggPage[data][subarray](offset, (offset += segmentLength))
     );
 
+    // prepend any existing continued packet data
+    if (this._continuedPacket[length]) {
+      oggPageStore[segments][0] = concatBuffers(
+        this._continuedPacket,
+        oggPageStore[segments][0]
+      );
+
+      this._continuedPacket = new uint8Array();
+    }
+
+    // save any new continued packet data
     if (
       headerData[pageSegmentBytes][headerData[pageSegmentBytes][length] - 1] ===
       0xff
     ) {
-      // continued packet
       this._continuedPacket = concatBuffers(
         this._continuedPacket,
         oggPageStore[segments].pop()
       );
-    } else if (this._continuedPacket[length]) {
-      oggPageStore[segments][0] = concatBuffers(
-        this._continuedPacket,
-        oggPageStore[segments][0]
-      );
-
-      this._continuedPacket = new uint8Array();
     }
 
     if (this._codec || this._checkForIdentifier(oggPage)) {

src/containers/ogg/OggParser.js

@@ -247,11 +247,11 @@ describe("CodecParser", () => {
 
     describe("Ogg Flac", () => {
       testParser("ogg.flac", mimeType, "flac", 742, 0);
-      testParser("ogg.flac.samplerate_50000", mimeType, "flac", 216, 0);
+      testParser("ogg.flac.samplerate_50000", mimeType, "flac", 217, 0);
       testParser("ogg.flac.samplerate_12345", mimeType, "flac", 178, 0);
       testParser("ogg.flac.blocksize_65535", mimeType, "flac", 13, 0);
       testParser("ogg.flac.blocksize_64", mimeType, "flac", 13137, 0);
-      testParser("ogg.flac.blocksize_variable_1", mimeType, "flac", 445, 0);
+      testParser("ogg.flac.blocksize_variable_1", mimeType, "flac", 446, 0);
       testParser("ogg.flac.blocksize_variable_2", mimeType, "flac", 478, 0);
       testParser("ogg.flac.utf8_frame_number", mimeType, "flac", 106, 0);
     });
@@ -268,6 +268,7 @@ describe("CodecParser", () => {
       testParser("ogg.vorbis", mimeType, "vorbis", 2441, 0);
       testParser("ogg.vorbis.extra_metadata", mimeType, "vorbis", 1647);
       testParser("ogg.vorbis.fishead", mimeType, "vorbis", 1365);
+      testParser("ogg.vorbis.continued", mimeType, "vorbis", 1151);
     });
   });