Use correct generics type bounds for TransferListener in MediaSources.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=203260699

extensions/ima/src/main/java/com/google/android/exoplayer2/ext/ima/ImaAdsMediaSource.java

@@ -80,7 +80,7 @@ public final class ImaAdsMediaSource extends BaseMediaSource implements SourceIn
   public void prepareSourceInternal(
       final ExoPlayer player,
       boolean isTopLevelSource,
-      @Nullable TransferListener<?> mediaTransferListener) {
+      @Nullable TransferListener<? super DataSource> mediaTransferListener) {
     adsMediaSource.prepareSource(
         player, isTopLevelSource, /* listener= */ this, mediaTransferListener);
   }

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

@@ -19,6 +19,7 @@ import android.os.Handler;
 import android.support.annotation.Nullable;
 import com.google.android.exoplayer2.ExoPlayer;
 import com.google.android.exoplayer2.Timeline;
+import com.google.android.exoplayer2.upstream.DataSource;
 import com.google.android.exoplayer2.upstream.TransferListener;
 import com.google.android.exoplayer2.util.Assertions;
 import java.util.ArrayList;
@@ -60,7 +61,7 @@ public abstract class BaseMediaSource implements MediaSource {
   protected abstract void prepareSourceInternal(
       ExoPlayer player,
       boolean isTopLevelSource,
-      @Nullable TransferListener<?> mediaTransferListener);
+      @Nullable TransferListener<? super DataSource> mediaTransferListener);
 
   /**
    * Releases the source. This method is called exactly once after each call to {@link
@@ -146,7 +147,7 @@ public abstract class BaseMediaSource implements MediaSource {
       ExoPlayer player,
       boolean isTopLevelSource,
       SourceInfoRefreshListener listener,
-      @Nullable TransferListener<?> mediaTransferListener) {
+      @Nullable TransferListener<? super DataSource> mediaTransferListener) {
     Assertions.checkArgument(this.player == null || this.player == player);
     sourceInfoListeners.add(listener);
     if (this.player == null) {

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

@@ -21,6 +21,7 @@ import com.google.android.exoplayer2.C;
 import com.google.android.exoplayer2.ExoPlayer;
 import com.google.android.exoplayer2.Timeline;
 import com.google.android.exoplayer2.upstream.Allocator;
+import com.google.android.exoplayer2.upstream.DataSource;
 import com.google.android.exoplayer2.upstream.TransferListener;
 import com.google.android.exoplayer2.util.Assertions;
 import java.io.IOException;
@@ -215,7 +216,7 @@ public final class ClippingMediaSource extends CompositeMediaSource<Void> {
   public void prepareSourceInternal(
       ExoPlayer player,
       boolean isTopLevelSource,
-      @Nullable TransferListener<?> mediaTransferListener) {
+      @Nullable TransferListener<? super DataSource> mediaTransferListener) {
     super.prepareSourceInternal(player, isTopLevelSource, mediaTransferListener);
     prepareChildSource(/* id= */ null, mediaSource);
   }

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

@@ -20,7 +20,7 @@ import android.support.annotation.CallSuper;
 import android.support.annotation.Nullable;
 import com.google.android.exoplayer2.ExoPlayer;
 import com.google.android.exoplayer2.Timeline;
-import com.google.android.exoplayer2.source.MediaSourceEventListener.MediaLoadData;
+import com.google.android.exoplayer2.upstream.DataSource;
 import com.google.android.exoplayer2.upstream.TransferListener;
 import com.google.android.exoplayer2.util.Assertions;
 import com.google.android.exoplayer2.util.Util;
@@ -38,7 +38,7 @@ public abstract class CompositeMediaSource<T> extends BaseMediaSource {
 
   private @Nullable ExoPlayer player;
   private @Nullable Handler eventHandler;
-  private @Nullable TransferListener<?> mediaTransferListener;
+  private @Nullable TransferListener<? super DataSource> mediaTransferListener;
 
   /** Create composite media source without child sources. */
   protected CompositeMediaSource() {
@@ -50,7 +50,7 @@ public abstract class CompositeMediaSource<T> extends BaseMediaSource {
   public void prepareSourceInternal(
       ExoPlayer player,
       boolean isTopLevelSource,
-      @Nullable TransferListener<?> mediaTransferListener) {
+      @Nullable TransferListener<? super DataSource> mediaTransferListener) {
     this.player = player;
     this.mediaTransferListener = mediaTransferListener;
     eventHandler = new Handler();

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

@@ -26,6 +26,7 @@ import com.google.android.exoplayer2.Timeline;
 import com.google.android.exoplayer2.source.ConcatenatingMediaSource.MediaSourceHolder;
 import com.google.android.exoplayer2.source.ShuffleOrder.DefaultShuffleOrder;
 import com.google.android.exoplayer2.upstream.Allocator;
+import com.google.android.exoplayer2.upstream.DataSource;
 import com.google.android.exoplayer2.upstream.TransferListener;
 import com.google.android.exoplayer2.util.Assertions;
 import com.google.android.exoplayer2.util.Util;
@@ -377,7 +378,7 @@ public class ConcatenatingMediaSource extends CompositeMediaSource<MediaSourceHo
   public final synchronized void prepareSourceInternal(
       ExoPlayer player,
       boolean isTopLevelSource,
-      @Nullable TransferListener<?> mediaTransferListener) {
+      @Nullable TransferListener<? super DataSource> mediaTransferListener) {
     super.prepareSourceInternal(player, isTopLevelSource, mediaTransferListener);
     this.player = player;
     playerApplicationHandler = new Handler(player.getApplicationLooper());

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

@@ -348,7 +348,7 @@ public final class ExtractorMediaSource extends BaseMediaSource
   public void prepareSourceInternal(
       ExoPlayer player,
       boolean isTopLevelSource,
-      @Nullable TransferListener<?> mediaTransferListener) {
+      @Nullable TransferListener<? super DataSource> mediaTransferListener) {
     notifySourceInfoRefreshed(timelineDurationUs, /* isSeekable= */ false);
   }
 

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

@@ -22,6 +22,7 @@ import com.google.android.exoplayer2.Player;
 import com.google.android.exoplayer2.Timeline;
 import com.google.android.exoplayer2.source.ShuffleOrder.UnshuffledShuffleOrder;
 import com.google.android.exoplayer2.upstream.Allocator;
+import com.google.android.exoplayer2.upstream.DataSource;
 import com.google.android.exoplayer2.upstream.TransferListener;
 import com.google.android.exoplayer2.util.Assertions;
 
@@ -64,7 +65,7 @@ public final class LoopingMediaSource extends CompositeMediaSource<Void> {
   public void prepareSourceInternal(
       ExoPlayer player,
       boolean isTopLevelSource,
-      @Nullable TransferListener<?> mediaTransferListener) {
+      @Nullable TransferListener<? super DataSource> mediaTransferListener) {
     super.prepareSourceInternal(player, isTopLevelSource, mediaTransferListener);
     prepareChildSource(/* id= */ null, childSource);
   }

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

@@ -21,6 +21,7 @@ import com.google.android.exoplayer2.C;
 import com.google.android.exoplayer2.ExoPlayer;
 import com.google.android.exoplayer2.Timeline;
 import com.google.android.exoplayer2.upstream.Allocator;
+import com.google.android.exoplayer2.upstream.DataSource;
 import com.google.android.exoplayer2.upstream.TransferListener;
 import java.io.IOException;
 
@@ -221,7 +222,7 @@ public interface MediaSource {
       ExoPlayer player,
       boolean isTopLevelSource,
       SourceInfoRefreshListener listener,
-      @Nullable TransferListener<?> mediaTransferListener);
+      @Nullable TransferListener<? super DataSource> mediaTransferListener);
 
   /**
    * Throws any pending error encountered while loading or refreshing source information.

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

@@ -20,6 +20,7 @@ import android.support.annotation.Nullable;
 import com.google.android.exoplayer2.ExoPlayer;
 import com.google.android.exoplayer2.Timeline;
 import com.google.android.exoplayer2.upstream.Allocator;
+import com.google.android.exoplayer2.upstream.DataSource;
 import com.google.android.exoplayer2.upstream.TransferListener;
 import java.io.IOException;
 import java.lang.annotation.Retention;
@@ -101,7 +102,7 @@ public final class MergingMediaSource extends CompositeMediaSource<Integer> {
   public void prepareSourceInternal(
       ExoPlayer player,
       boolean isTopLevelSource,
-      @Nullable TransferListener<?> mediaTransferListener) {
+      @Nullable TransferListener<? super DataSource> mediaTransferListener) {
     super.prepareSourceInternal(player, isTopLevelSource, mediaTransferListener);
     for (int i = 0; i < mediaSources.length; i++) {
       prepareChildSource(i, mediaSources[i]);

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

@@ -272,7 +272,7 @@ public final class SingleSampleMediaSource extends BaseMediaSource {
   public void prepareSourceInternal(
       ExoPlayer player,
       boolean isTopLevelSource,
-      @Nullable TransferListener<?> mediaTransferListener) {
+      @Nullable TransferListener<? super DataSource> mediaTransferListener) {
     refreshSourceInfo(timeline, /* manifest= */ null);
   }
 

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

@@ -309,7 +309,7 @@ public final class AdsMediaSource extends CompositeMediaSource<MediaPeriodId> {
   public void prepareSourceInternal(
       final ExoPlayer player,
       boolean isTopLevelSource,
-      @Nullable TransferListener<?> mediaTransferListener) {
+      @Nullable TransferListener<? super DataSource> mediaTransferListener) {
     super.prepareSourceInternal(player, isTopLevelSource, mediaTransferListener);
     Assertions.checkArgument(isTopLevelSource);
     final ComponentListener componentListener = new ComponentListener();

library/core/src/test/java/com/google/android/exoplayer2/ExoPlayerTest.java

@@ -45,6 +45,7 @@ import com.google.android.exoplayer2.testutil.FakeTrackSelection;
 import com.google.android.exoplayer2.testutil.FakeTrackSelector;
 import com.google.android.exoplayer2.testutil.RobolectricUtil;
 import com.google.android.exoplayer2.upstream.Allocator;
+import com.google.android.exoplayer2.upstream.DataSource;
 import com.google.android.exoplayer2.upstream.TransferListener;
 import java.io.IOException;
 import java.util.ArrayList;
@@ -233,7 +234,7 @@ public final class ExoPlayerTest {
           public synchronized void prepareSourceInternal(
               ExoPlayer player,
               boolean isTopLevelSource,
-              @Nullable TransferListener<?> mediaTransferListener) {
+              @Nullable TransferListener<? super DataSource> mediaTransferListener) {
             super.prepareSourceInternal(player, isTopLevelSource, mediaTransferListener);
             // We've queued a source info refresh on the playback thread's event queue. Allow the
             // test thread to prepare the player with the third source, and block this thread (the

library/dash/src/main/java/com/google/android/exoplayer2/source/dash/DashMediaSource.java

@@ -549,7 +549,7 @@ public final class DashMediaSource extends BaseMediaSource {
   public void prepareSourceInternal(
       ExoPlayer player,
       boolean isTopLevelSource,
-      @Nullable TransferListener<?> mediaTransferListener) {
+      @Nullable TransferListener<? super DataSource> mediaTransferListener) {
     if (sideloadedManifest) {
       processManifest(false);
     } else {

library/hls/src/main/java/com/google/android/exoplayer2/source/hls/HlsMediaSource.java

@@ -371,7 +371,7 @@ public final class HlsMediaSource extends BaseMediaSource
   public void prepareSourceInternal(
       ExoPlayer player,
       boolean isTopLevelSource,
-      @Nullable TransferListener<?> mediaTransferListener) {
+      @Nullable TransferListener<? super DataSource> mediaTransferListener) {
     EventDispatcher eventDispatcher = createEventDispatcher(/* mediaPeriodId= */ null);
     playlistTracker.start(manifestUri, eventDispatcher, /* listener= */ this);
   }

library/smoothstreaming/src/main/java/com/google/android/exoplayer2/source/smoothstreaming/SsMediaSource.java

@@ -466,7 +466,7 @@ public final class SsMediaSource extends BaseMediaSource
   public void prepareSourceInternal(
       ExoPlayer player,
       boolean isTopLevelSource,
-      @Nullable TransferListener<?> mediaTransferListener) {
+      @Nullable TransferListener<? super DataSource> mediaTransferListener) {
     if (sideloadedManifest) {
       manifestLoaderErrorThrower = new LoaderErrorThrower.Dummy();
       processManifest();

testutils/src/main/java/com/google/android/exoplayer2/testutil/FakeMediaSource.java

@@ -35,6 +35,7 @@ import com.google.android.exoplayer2.source.MediaSourceEventListener.MediaLoadDa
 import com.google.android.exoplayer2.source.TrackGroup;
 import com.google.android.exoplayer2.source.TrackGroupArray;
 import com.google.android.exoplayer2.upstream.Allocator;
+import com.google.android.exoplayer2.upstream.DataSource;
 import com.google.android.exoplayer2.upstream.DataSpec;
 import com.google.android.exoplayer2.upstream.TransferListener;
 import com.google.android.exoplayer2.util.Assertions;
@@ -90,7 +91,7 @@ public class FakeMediaSource extends BaseMediaSource {
   public synchronized void prepareSourceInternal(
       ExoPlayer player,
       boolean isTopLevelSource,
-      @Nullable TransferListener<?> mediaTransferListener) {
+      @Nullable TransferListener<? super DataSource> mediaTransferListener) {
     assertThat(preparedSource).isFalse();
     preparedSource = true;
     releasedSource = false;