Rename TrackRenderer.reset to TrackRenderer.onReset.

This allows the TrackRenderer superclass to do things when the renderer is
reset, and makes resetting consistent with other 'events' on renderers.
-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=123974633

extensions/vp9/src/main/java/com/google/android/exoplayer/ext/vp9/LibvpxVideoTrackRenderer.java

@@ -326,7 +326,13 @@ public final class LibvpxVideoTrackRenderer extends TrackRenderer {
   }
 
   @Override
-  protected void reset(long positionUs) {
+  protected void onEnabled(boolean joining) throws ExoPlaybackException {
+    codecCounters.reset();
+    eventDispatcher.enabled(codecCounters);
+  }
+
+  @Override
+  protected void onReset(long positionUs) {
     inputStreamEnded = false;
     outputStreamEnded = false;
     renderedFirstFrame = false;
@@ -336,12 +342,6 @@ public final class LibvpxVideoTrackRenderer extends TrackRenderer {
     }
   }
 
-  @Override
-  protected void onEnabled(boolean joining) throws ExoPlaybackException {
-    codecCounters.reset();
-    eventDispatcher.enabled(codecCounters);
-  }
-
   @Override
   protected void onStarted() {
     droppedFrameCount = 0;

library/src/main/java/com/google/android/exoplayer/MediaCodecAudioTrackRenderer.java

@@ -261,6 +261,14 @@ public class MediaCodecAudioTrackRenderer extends MediaCodecTrackRenderer implem
     super.onEnabled(joining);
   }
 
+  @Override
+  protected void onReset(long positionUs) throws ExoPlaybackException {
+    super.onReset(positionUs);
+    audioTrack.reset();
+    currentPositionUs = positionUs;
+    allowPositionDiscontinuity = true;
+  }
+
   @Override
   protected void onStarted() {
     super.onStarted();
@@ -305,14 +313,6 @@ public class MediaCodecAudioTrackRenderer extends MediaCodecTrackRenderer implem
     return currentPositionUs;
   }
 
-  @Override
-  protected void reset(long positionUs) throws ExoPlaybackException {
-    super.reset(positionUs);
-    audioTrack.reset();
-    currentPositionUs = positionUs;
-    allowPositionDiscontinuity = true;
-  }
-
   @Override
   protected boolean processOutputBuffer(long positionUs, long elapsedRealtimeUs, MediaCodec codec,
       ByteBuffer buffer, int bufferIndex, int bufferFlags, long bufferPresentationTimeUs,

library/src/main/java/com/google/android/exoplayer/MediaCodecTrackRenderer.java

@@ -340,6 +340,15 @@ public abstract class MediaCodecTrackRenderer extends TrackRenderer {
     return codec == null && format != null;
   }
 
+  @Override
+  protected void onReset(long positionUs) throws ExoPlaybackException {
+    inputStreamEnded = false;
+    outputStreamEnded = false;
+    if (codec != null) {
+      flushCodec();
+    }
+  }
+
   @Override
   protected void onDisabled() {
     format = null;
@@ -391,15 +400,6 @@ public abstract class MediaCodecTrackRenderer extends TrackRenderer {
     }
   }
 
-  @Override
-  protected void reset(long positionUs) throws ExoPlaybackException {
-    inputStreamEnded = false;
-    outputStreamEnded = false;
-    if (codec != null) {
-      flushCodec();
-    }
-  }
-
   @Override
   protected void onStarted() {
     // Do nothing. Overridden to remove throws clause.

library/src/main/java/com/google/android/exoplayer/MediaCodecVideoTrackRenderer.java

@@ -236,8 +236,8 @@ public class MediaCodecVideoTrackRenderer extends MediaCodecTrackRenderer {
   }
 
   @Override
-  protected void reset(long positionUs) throws ExoPlaybackException {
-    super.reset(positionUs);
+  protected void onReset(long positionUs) throws ExoPlaybackException {
+    super.onReset(positionUs);
     renderedFirstFrame = false;
     consecutiveDroppedFrameCount = 0;
     joiningDeadlineMs = -1;

library/src/main/java/com/google/android/exoplayer/TrackRenderer.java

@@ -216,6 +216,28 @@ public abstract class TrackRenderer implements ExoPlayerComponent {
     // Do nothing.
   }
 
+  /**
+   * Called when a reset is encountered, and also when the renderer is enabled.
+   *
+   * @param positionUs The playback position in microseconds.
+   * @throws ExoPlaybackException If an error occurs handling the reset.
+   */
+  /* package */ final void reset(long positionUs) throws ExoPlaybackException {
+    onReset(positionUs);
+  }
+
+  /**
+   * Called when a reset is encountered, and also when the renderer is enabled.
+   * <p>
+   * The default implementation is a no-op.
+   *
+   * @param positionUs The playback position in microseconds.
+   * @throws ExoPlaybackException If an error occurs handling the reset.
+   */
+  protected void onReset(long positionUs) throws ExoPlaybackException {
+    // Do nothing.
+  }
+
   /**
    * Starts the renderer, meaning that calls to {@link #render(long, long)} will cause media to be
    * rendered.
@@ -348,17 +370,6 @@ public abstract class TrackRenderer implements ExoPlayerComponent {
    */
   protected abstract int supportsFormat(Format format) throws ExoPlaybackException;
 
-  /**
-   * Invoked when a reset is encountered, and also when the renderer is enabled.
-   * <p>
-   * This method may be called when the renderer is in the following states:
-   * {@link #STATE_ENABLED}, {@link #STATE_STARTED}.
-   *
-   * @param positionUs The playback position in microseconds.
-   * @throws ExoPlaybackException If an error occurs handling the reset.
-   */
-  protected abstract void reset(long positionUs) throws ExoPlaybackException;
-
   /**
    * Incrementally renders the {@link TrackStream}.
    * <p>

library/src/main/java/com/google/android/exoplayer/extensions/AudioDecoderTrackRenderer.java

@@ -277,18 +277,6 @@ public abstract class AudioDecoderTrackRenderer extends TrackRenderer implements
     return currentPositionUs;
   }
 
-  @Override
-  protected void reset(long positionUs) {
-    audioTrack.reset();
-    currentPositionUs = positionUs;
-    allowPositionDiscontinuity = true;
-    inputStreamEnded = false;
-    outputStreamEnded = false;
-    if (decoder != null) {
-      flushDecoder();
-    }
-  }
-
   /**
    * Invoked when the audio session id becomes known. Once the id is known it will not change
    * (and hence this method will not be invoked again) unless the renderer is disabled and then
@@ -308,6 +296,18 @@ public abstract class AudioDecoderTrackRenderer extends TrackRenderer implements
     eventDispatcher.enabled(codecCounters);
   }
 
+  @Override
+  protected void onReset(long positionUs) {
+    audioTrack.reset();
+    currentPositionUs = positionUs;
+    allowPositionDiscontinuity = true;
+    inputStreamEnded = false;
+    outputStreamEnded = false;
+    if (decoder != null) {
+      flushDecoder();
+    }
+  }
+
   @Override
   protected void onStarted() {
     audioTrack.play();

library/src/main/java/com/google/android/exoplayer/metadata/MetadataTrackRenderer.java

@@ -98,7 +98,7 @@ public final class MetadataTrackRenderer<T> extends TrackRenderer implements Cal
   }
 
   @Override
-  protected void reset(long positionUs) {
+  protected void onReset(long positionUs) {
     pendingMetadata = null;
     inputStreamEnded = false;
   }

library/src/main/java/com/google/android/exoplayer/text/TextTrackRenderer.java

@@ -112,7 +112,7 @@ public final class TextTrackRenderer extends TrackRenderer implements Callback {
   }
 
   @Override
-  protected void reset(long positionUs) {
+  protected void onReset(long positionUs) {
     inputStreamEnded = false;
     outputStreamEnded = false;
     if (subtitle != null) {