Fix miscellaneous nits/typos

PiperOrigin-RevId: 335642909

demos/main/src/main/java/com/google/android/exoplayer2/demo/PlayerActivity.java

@@ -102,7 +102,7 @@ public class PlayerActivity extends AppCompatActivity
   private int startWindow;
   private long startPosition;
 
-  // Fields used only for ad playback. The ads loader is loaded via reflection.
+  // Fields used only for ad playback.
 
   private AdsLoader adsLoader;
   private Uri loadedAdTagUri;

extensions/media2/src/main/java/com/google/android/exoplayer2/ext/media2/MediaItemConverter.java

@@ -23,13 +23,13 @@ import com.google.android.exoplayer2.MediaItem;
  */
 public interface MediaItemConverter {
   /**
-   * Converts an {@link androidx.media2.common.MediaItem Media2 MediaItem} to an {@link MediaItem
+   * Converts a {@link androidx.media2.common.MediaItem Media2 MediaItem} to an {@link MediaItem
    * ExoPlayer MediaItem}.
    */
   MediaItem convertToExoPlayerMediaItem(androidx.media2.common.MediaItem media2MediaItem);
 
   /**
-   * Converts an {@link MediaItem ExoPlayer MediaItem} to an {@link androidx.media2.common.MediaItem
+   * Converts an {@link MediaItem ExoPlayer MediaItem} to a {@link androidx.media2.common.MediaItem
    * Media2 MediaItem}.
    */
   androidx.media2.common.MediaItem convertToMedia2MediaItem(MediaItem exoPlayerMediaItem);

library/core/src/main/java/com/google/android/exoplayer2/ExoPlayerImpl.java

@@ -157,7 +157,7 @@ import java.util.concurrent.TimeoutException;
         new TrackSelectorResult(
             new RendererConfiguration[renderers.length],
             new TrackSelection[renderers.length],
-            null);
+            /* info= */ null);
     period = new Timeline.Period();
     maskingWindowIndex = C.INDEX_UNSET;
     playbackInfoUpdateHandler = new Handler(applicationLooper);

library/core/src/main/java/com/google/android/exoplayer2/MediaPeriodQueue.java

@@ -315,8 +315,8 @@ import com.google.common.collect.ImmutableList;
   public boolean updateQueuedPeriods(
       Timeline timeline, long rendererPositionUs, long maxRendererReadPositionUs) {
     // TODO: Merge this into setTimeline so that the queue gets updated as soon as the new timeline
-    // is set, once all cases handled by ExoPlayerImplInternal.handleSourceInfoRefreshed can be
+    // is set, once all cases handled by ExoPlayerImplInternal.handleMediaSourceListInfoRefreshed
-    // handled here.
+    // can be handled here.
     MediaPeriodHolder previousPeriodHolder = null;
     MediaPeriodHolder periodHolder = playing;
     while (periodHolder != null) {
@@ -326,8 +326,8 @@ import com.google.common.collect.ImmutableList;
       MediaPeriodInfo newPeriodInfo;
       if (previousPeriodHolder == null) {
         // The id and start position of the first period have already been verified by
-        // ExoPlayerImplInternal.handleSourceInfoRefreshed. Just update duration, isLastInTimeline
+        // ExoPlayerImplInternal.handleMediaSourceListInfoRefreshed. Just update duration,
-        // and isLastInPeriod flags.
+        // isLastInTimeline and isLastInPeriod flags.
         newPeriodInfo = getUpdatedMediaPeriodInfo(timeline, oldPeriodInfo);
       } else {
         newPeriodInfo =

library/core/src/main/java/com/google/android/exoplayer2/source/ProgressiveMediaSource.java

@@ -340,7 +340,7 @@ public final class ProgressiveMediaSource extends BaseMediaSource
             /* manifest= */ null,
             mediaItem);
     if (timelineIsPlaceholder) {
-      // TODO: Actually prepare the extractors during prepatation so that we don't need a
+      // TODO: Actually prepare the extractors during preparation so that we don't need a
       // placeholder. See https://github.com/google/ExoPlayer/issues/4727.
       timeline =
           new ForwardingTimeline(timeline) {

library/core/src/main/java/com/google/android/exoplayer2/trackselection/MappingTrackSelector.java

@@ -339,14 +339,15 @@ public abstract class MappingTrackSelector extends TrackSelector {
    * Returns the mapping information for the currently active track selection, or null if no
    * selection is currently active.
    */
-  public final @Nullable MappedTrackInfo getCurrentMappedTrackInfo() {
+  @Nullable
+  public final MappedTrackInfo getCurrentMappedTrackInfo() {
     return currentMappedTrackInfo;
   }
 
   // TrackSelector implementation.
 
   @Override
-  public final void onSelectionActivated(Object info) {
+  public final void onSelectionActivated(@Nullable Object info) {
     currentMappedTrackInfo = (MappedTrackInfo) info;
   }
 

library/core/src/main/java/com/google/android/exoplayer2/trackselection/TrackSelector.java

@@ -137,7 +137,7 @@ public abstract class TrackSelector {
    *
    * @param info The value of {@link TrackSelectorResult#info} in the activated selection.
    */
-  public abstract void onSelectionActivated(Object info);
+  public abstract void onSelectionActivated(@Nullable Object info);
 
   /**
    * Calls {@link InvalidationListener#onTrackSelectionsInvalidated()} to invalidate all previously

library/core/src/main/java/com/google/android/exoplayer2/trackselection/TrackSelectorResult.java

@@ -40,19 +40,20 @@ public final class TrackSelectorResult {
    * An opaque object that will be returned to {@link TrackSelector#onSelectionActivated(Object)}
    * should the selections be activated.
    */
-  public final Object info;
+  @Nullable public final Object info;
 
   /**
    * @param rendererConfigurations A {@link RendererConfiguration} for each renderer. A null entry
    *     indicates the corresponding renderer should be disabled.
    * @param selections A {@link TrackSelectionArray} containing the selection for each renderer.
    * @param info An opaque object that will be returned to {@link
-   *     TrackSelector#onSelectionActivated(Object)} should the selection be activated.
+   *     TrackSelector#onSelectionActivated(Object)} should the selection be activated. May be
+   *     {@code null}.
    */
   public TrackSelectorResult(
       @NullableType RendererConfiguration[] rendererConfigurations,
       @NullableType TrackSelection[] selections,
-      Object info) {
+      @Nullable Object info) {
     this.rendererConfigurations = rendererConfigurations;
     this.selections = new TrackSelectionArray(selections);
     this.info = info;

library/core/src/test/java/com/google/android/exoplayer2/trackselection/TrackSelectorTest.java

@@ -18,6 +18,7 @@ package com.google.android.exoplayer2.trackselection;
 import static com.google.common.truth.Truth.assertThat;
 import static org.junit.Assert.fail;
 
+import androidx.annotation.Nullable;
 import androidx.test.ext.junit.runners.AndroidJUnit4;
 import com.google.android.exoplayer2.ExoPlaybackException;
 import com.google.android.exoplayer2.RendererCapabilities;
@@ -52,7 +53,7 @@ public class TrackSelectorTest {
           }
 
           @Override
-          public void onSelectionActivated(Object info) {}
+          public void onSelectionActivated(@Nullable Object info) {}
         };
   }
 

library/core/src/test/java/com/google/android/exoplayer2/video/MediaCodecVideoRendererTest.java

@@ -46,7 +46,6 @@ import com.google.android.exoplayer2.drm.DrmSessionEventListener;
 import com.google.android.exoplayer2.drm.DrmSessionManager;
 import com.google.android.exoplayer2.mediacodec.MediaCodecInfo;
 import com.google.android.exoplayer2.mediacodec.MediaCodecSelector;
-import com.google.android.exoplayer2.mediacodec.MediaCodecUtil.DecoderQueryException;
 import com.google.android.exoplayer2.testutil.FakeSampleStream;
 import com.google.android.exoplayer2.testutil.FakeSampleStream.FakeSampleStreamItem;
 import com.google.android.exoplayer2.util.MimeTypes;
@@ -107,8 +106,7 @@ public class MediaCodecVideoRendererTest {
             /* maxDroppedFramesToNotify= */ 1) {
           @Override
           @Capabilities
-          protected int supportsFormat(MediaCodecSelector mediaCodecSelector, Format format)
+          protected int supportsFormat(MediaCodecSelector mediaCodecSelector, Format format) {
-              throws DecoderQueryException {
             return RendererCapabilities.create(FORMAT_HANDLED);
           }
 

library/ui/src/main/java/com/google/android/exoplayer2/ui/SubtitleView.java

@@ -414,5 +414,4 @@ public final class SubtitleView extends FrameLayout implements TextOutput {
     return cue;
   }
 
-
 }