Cast module cleanup

PiperOrigin-RevId: 402259951

extensions/cast/README.md

-# ExoPlayer Cast extension
+# Cast module
 
-## Description
-
-The cast extension is a [Player][] implementation that controls playback on a
-Cast receiver app.
+This module provides a [Player][] implementation that controls a Cast receiver
+app.
 
 [Player]: https://exoplayer.dev/doc/reference/index.html?com/google/android/exoplayer2/Player.html
 
@@ -25,5 +23,14 @@ locally. Instructions for doing this can be found in the [top level README][].
 
 ## Using the module
 
-Create a `CastPlayer` and use it to integrate Cast into your app using
-ExoPlayer's common `Player` interface.
+Create a `CastPlayer` and use it to control a Cast receiver app. Since
+`CastPlayer` implements the `Player` interface, it can be passed to all media
+components that accept a `Player`, including the UI components provided by the
+UI module.
+
+## Links
+
+*   [Javadoc][]: Classes matching `com.google.android.exoplayer2.ext.cast.*` belong to this
+    module.
+
+[Javadoc]: https://exoplayer.dev/doc/reference/index.html

extensions/cast/src/main/java/com/google/android/exoplayer2/ext/cast/CastPlayer.java

@@ -1322,7 +1322,7 @@ public final class CastPlayer extends BasePlayer {
       currentWindowIndex = timeline.getIndexOfPeriod(currentItem.getItemId());
     }
     if (currentWindowIndex == C.INDEX_UNSET) {
-      // The timeline is empty. Fall back to index 0, which is what ExoPlayer would do.
+      // The timeline is empty. Fall back to index 0.
       currentWindowIndex = 0;
     }
     return currentWindowIndex;

extensions/cast/src/main/java/com/google/android/exoplayer2/ext/cast/CastUtils.java

@@ -22,7 +22,7 @@ import com.google.android.gms.cast.CastStatusCodes;
 import com.google.android.gms.cast.MediaInfo;
 import com.google.android.gms.cast.MediaTrack;
 
-/** Utility methods for ExoPlayer/Cast integration. */
+/** Utility methods for Cast integration. */
 /* package */ final class CastUtils {
 
   /** The duration returned by {@link MediaInfo#getStreamDuration()} for live streams. */

extensions/cast/src/main/java/com/google/android/exoplayer2/ext/cast/DefaultMediaItemConverter.java

@@ -167,16 +167,16 @@ public final class DefaultMediaItemConverter implements MediaItemConverter {
       return null;
     }
 
-    JSONObject exoPlayerConfigJson = new JSONObject();
-    exoPlayerConfigJson.put("withCredentials", false);
-    exoPlayerConfigJson.put("protectionSystem", drmScheme);
+    JSONObject playerConfigJson = new JSONObject();
+    playerConfigJson.put("withCredentials", false);
+    playerConfigJson.put("protectionSystem", drmScheme);
     if (drmConfiguration.licenseUri != null) {
-      exoPlayerConfigJson.put("licenseUrl", drmConfiguration.licenseUri);
+      playerConfigJson.put("licenseUrl", drmConfiguration.licenseUri);
     }
     if (!drmConfiguration.licenseRequestHeaders.isEmpty()) {
-      exoPlayerConfigJson.put("headers", new JSONObject(drmConfiguration.licenseRequestHeaders));
+      playerConfigJson.put("headers", new JSONObject(drmConfiguration.licenseRequestHeaders));
     }
 
-    return exoPlayerConfigJson;
+    return playerConfigJson;
   }
 }