Fix init data handling for FLAC in MP4

Issue: #6396
PiperOrigin-RevId: 267536336

RELEASENOTES.md

@@ -95,6 +95,8 @@
 * Fix issue where playback speeds are not used in adaptive track selections
   after manual selection changes for other renderers
   ([#6256](https://github.com/google/ExoPlayer/issues/6256)).
+* Fix initialization data handling for FLAC in MP4
+  ([#6396](https://github.com/google/ExoPlayer/issues/6396)).
 
 ### 2.10.3 ###
 

library/core/src/main/java/com/google/android/exoplayer2/extractor/mp4/AtomParsers.java

@@ -1162,7 +1162,7 @@ import java.util.List;
         System.arraycopy(opusMagic, 0, initializationData, 0, opusMagic.length);
         parent.setPosition(childPosition + Atom.HEADER_SIZE);
         parent.readBytes(initializationData, opusMagic.length, childAtomBodySize);
-      } else if (childAtomSize == Atom.TYPE_dfLa || childAtomType == Atom.TYPE_alac) {
+      } else if (childAtomType == Atom.TYPE_dfLa || childAtomType == Atom.TYPE_alac) {
         int childAtomBodySize = childAtomSize - Atom.FULL_HEADER_SIZE;
         initializationData = new byte[childAtomBodySize];
         parent.setPosition(childPosition + Atom.FULL_HEADER_SIZE);