Merge pull request #8357 from TiVo:p-fix-cea708anchor

PiperOrigin-RevId: 348440799

RELEASENOTES.md

@@ -67,6 +67,8 @@
 *   Text:
     *   Gracefully handle null-terminated subtitle content in Matroska
         containers.
+    *   Fix CEA-708 anchor positioning
+        ([#1807](https://github.com/google/ExoPlayer/issues/1807)).
 *   OkHttp extension:
     *   Add `OkHttpDataSource.Factory` and deprecate `OkHttpDataSourceFactory`.
 *   Media2 extension

library/core/src/main/java/com/google/android/exoplayer2/text/cea/Cea708Decoder.java

@@ -1226,18 +1226,18 @@ public final class Cea708Decoder extends CeaDecoder {
       //   |           |
       //   6-----7-----8
       @AnchorType int verticalAnchorType;
-      if (anchorId % 3 == 0) {
+      if (anchorId / 3 == 0) {
         verticalAnchorType = Cue.ANCHOR_TYPE_START;
-      } else if (anchorId % 3 == 1) {
+      } else if (anchorId / 3 == 1) {
         verticalAnchorType = Cue.ANCHOR_TYPE_MIDDLE;
       } else {
         verticalAnchorType = Cue.ANCHOR_TYPE_END;
       }
       // TODO: Add support for right-to-left languages (i.e. where start is on the right).
       @AnchorType int horizontalAnchorType;
-      if (anchorId / 3 == 0) {
+      if (anchorId % 3 == 0) {
         horizontalAnchorType = Cue.ANCHOR_TYPE_START;
-      } else if (anchorId / 3 == 1) {
+      } else if (anchorId % 3 == 1) {
         horizontalAnchorType = Cue.ANCHOR_TYPE_MIDDLE;
       } else {
         horizontalAnchorType = Cue.ANCHOR_TYPE_END;