Merge SampleSourceTrackRenderer into TrackRenderer.

TrackRenderer and SampleSourceTrackRenderer both now use a TrackStream
so they can be merged.

(This may also be useful for adding playlist support, in case TrackStreams need
to be replaced during playback.)
-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=119743228

extensions/flac/src/main/java/com/google/android/exoplayer/ext/flac/LibflacAudioTrackRenderer.java

@@ -22,7 +22,6 @@ import com.google.android.exoplayer.ExoPlayer;
 import com.google.android.exoplayer.Format;
 import com.google.android.exoplayer.Format;
 import com.google.android.exoplayer.FormatHolder;
 import com.google.android.exoplayer.FormatHolder;
 import com.google.android.exoplayer.MediaClock;
 import com.google.android.exoplayer.MediaClock;
-import com.google.android.exoplayer.SampleSourceTrackRenderer;
 import com.google.android.exoplayer.TrackRenderer;
 import com.google.android.exoplayer.TrackRenderer;
 import com.google.android.exoplayer.TrackStream;
 import com.google.android.exoplayer.TrackStream;
 import com.google.android.exoplayer.audio.AudioTrack;
 import com.google.android.exoplayer.audio.AudioTrack;
@@ -35,8 +34,7 @@ import java.util.List;
 /**
 /**
  * Decodes and renders audio using the native Flac decoder.
  * Decodes and renders audio using the native Flac decoder.
  */
  */
-public final class LibflacAudioTrackRenderer extends SampleSourceTrackRenderer
-    implements MediaClock {
+public final class LibflacAudioTrackRenderer extends TrackRenderer implements MediaClock {
 
 
   /**
   /**
    * Interface definition for a callback to be notified of {@link LibflacAudioTrackRenderer} events.
    * Interface definition for a callback to be notified of {@link LibflacAudioTrackRenderer} events.

extensions/opus/src/main/java/com/google/android/exoplayer/ext/opus/LibopusAudioTrackRenderer.java

@@ -22,7 +22,6 @@ import com.google.android.exoplayer.ExoPlayer;
 import com.google.android.exoplayer.Format;
 import com.google.android.exoplayer.Format;
 import com.google.android.exoplayer.FormatHolder;
 import com.google.android.exoplayer.FormatHolder;
 import com.google.android.exoplayer.MediaClock;
 import com.google.android.exoplayer.MediaClock;
-import com.google.android.exoplayer.SampleSourceTrackRenderer;
 import com.google.android.exoplayer.TrackRenderer;
 import com.google.android.exoplayer.TrackRenderer;
 import com.google.android.exoplayer.TrackStream;
 import com.google.android.exoplayer.TrackStream;
 import com.google.android.exoplayer.audio.AudioTrack;
 import com.google.android.exoplayer.audio.AudioTrack;
@@ -35,8 +34,7 @@ import java.util.List;
 /**
 /**
  * Decodes and renders audio using the native Opus decoder.
  * Decodes and renders audio using the native Opus decoder.
  */
  */
-public final class LibopusAudioTrackRenderer extends SampleSourceTrackRenderer
-    implements MediaClock {
+public final class LibopusAudioTrackRenderer extends TrackRenderer implements MediaClock {
 
 
   /**
   /**
    * Interface definition for a callback to be notified of {@link LibopusAudioTrackRenderer} events.
    * Interface definition for a callback to be notified of {@link LibopusAudioTrackRenderer} events.

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

@@ -36,17 +36,12 @@ public final class DummyTrackRenderer extends TrackRenderer {
   }
   }
 
 
   @Override
   @Override
-  protected void checkForReset() throws ExoPlaybackException {
-    throw new IllegalStateException();
-  }
-
-  @Override
   protected void render(long positionUs, long elapsedRealtimeUs) throws ExoPlaybackException {
   protected void render(long positionUs, long elapsedRealtimeUs) throws ExoPlaybackException {
     throw new IllegalStateException();
     throw new IllegalStateException();
   }
   }
 
 
   @Override
   @Override
-  protected void maybeThrowError() {
+  protected void reset(long positionUs) throws ExoPlaybackException {
     throw new IllegalStateException();
     throw new IllegalStateException();
   }
   }
 
 

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

@@ -102,6 +102,11 @@ import java.util.concurrent.atomic.AtomicInteger;
     this.state = ExoPlayer.STATE_IDLE;
     this.state = ExoPlayer.STATE_IDLE;
     this.durationUs = C.UNKNOWN_TIME_US;
     this.durationUs = C.UNKNOWN_TIME_US;
     this.bufferedPositionUs = C.UNKNOWN_TIME_US;
     this.bufferedPositionUs = C.UNKNOWN_TIME_US;
+
+    for (int i = 0; i < renderers.length; i++) {
+      renderers[i].setIndex(i);
+    }
+
     standaloneMediaClock = new StandaloneMediaClock();
     standaloneMediaClock = new StandaloneMediaClock();
     pendingSeekCount = new AtomicInteger();
     pendingSeekCount = new AtomicInteger();
     enabledRenderers = new TrackRenderer[0];
     enabledRenderers = new TrackRenderer[0];

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

@@ -40,7 +40,7 @@ import java.util.List;
  * An abstract {@link TrackRenderer} that uses {@link MediaCodec} to decode samples for rendering.
  * An abstract {@link TrackRenderer} that uses {@link MediaCodec} to decode samples for rendering.
  */
  */
 @TargetApi(16)
 @TargetApi(16)
-public abstract class MediaCodecTrackRenderer extends SampleSourceTrackRenderer {
+public abstract class MediaCodecTrackRenderer extends TrackRenderer {
 
 
   /**
   /**
    * Interface definition for a callback to be notified of {@link MediaCodecTrackRenderer} events.
    * Interface definition for a callback to be notified of {@link MediaCodecTrackRenderer} events.

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

@@ -260,9 +260,8 @@ public class MediaCodecVideoTrackRenderer extends MediaCodecTrackRenderer {
   }
   }
 
 
   @Override
   @Override
-  protected void onEnabled(Format[] formats, TrackStream trackStream, long positionUs,
-      boolean joining) throws ExoPlaybackException {
-    super.onEnabled(formats, trackStream, positionUs, joining);
+  protected void onEnabled(Format[] formats, boolean joining) throws ExoPlaybackException {
+    super.onEnabled(formats, joining);
     adaptiveMaxWidth = Format.NO_VALUE;
     adaptiveMaxWidth = Format.NO_VALUE;
     adaptiveMaxHeight = Format.NO_VALUE;
     adaptiveMaxHeight = Format.NO_VALUE;
     if (formats.length > 1) {
     if (formats.length > 1) {

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

-/*
- * Copyright (C) 2014 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package com.google.android.exoplayer;
-
-import com.google.android.exoplayer.util.Assertions;
-
-import java.io.IOException;
-
-/**
- * Base class for {@link TrackRenderer} implementations that render samples obtained from a
- * {@link SampleSource}.
- */
-public abstract class SampleSourceTrackRenderer extends TrackRenderer {
-
-  private TrackStream trackStream;
-
-  @Override
-  protected void onEnabled(Format[] formats, TrackStream trackStream, long positionUs,
-      boolean joining) throws ExoPlaybackException {
-    this.trackStream = Assertions.checkNotNull(trackStream);
-    reset(positionUs);
-  }
-
-  @Override
-  protected final void checkForReset() throws ExoPlaybackException {
-    long resetPositionUs = trackStream.readReset();
-    if (resetPositionUs != TrackStream.NO_RESET) {
-      reset(resetPositionUs);
-      return;
-    }
-  }
-
-  @Override
-  protected final void maybeThrowError() throws IOException {
-    trackStream.maybeThrowError();
-  }
-
-  @Override
-  protected void onDisabled() {
-    trackStream = null;
-  }
-
-  // Methods to be called by subclasses.
-
-  /**
-   * Reads from the enabled upstream source.
-   *
-   * @see TrackStream#readData(FormatHolder, DecoderInputBuffer)
-   */
-  protected final int readSource(FormatHolder formatHolder, DecoderInputBuffer buffer) {
-    return trackStream.readData(formatHolder, buffer);
-  }
-
-  /**
-   * Returns whether the upstream source is ready.
-   *
-   * @return True if the source is ready. False otherwise.
-   */
-  protected final boolean isSourceReady() {
-    return trackStream.isReady();
-  }
-
-  // Abstract methods.
-
-  /**
-   * Invoked 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.
-   */
-  protected abstract void reset(long positionUs) throws ExoPlaybackException;
-
-}

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

@@ -162,27 +162,6 @@ public abstract class TrackRenderer implements ExoPlayerComponent {
   }
   }
 
 
   /**
   /**
-   * Returns the extent to which the renderer supports a given format.
-   * <p>
-   * The returned value is the bitwise OR of two properties:
-   * <ul>
-   * <li>The level of support for the format itself. One of {@code}link #FORMAT_HANDLED},
-   * {@link #FORMAT_EXCEEDS_CAPABILITIES}, {@link #FORMAT_UNSUPPORTED_SUBTYPE} and
-   * {@link #FORMAT_UNSUPPORTED_TYPE}.</li>
-   * <li>The level of support for adapting from the format to another format of the same mimeType.
-   * One of {@link #ADAPTIVE_SEAMLESS}, {@link #ADAPTIVE_NOT_SEAMLESS} and
-   * {@link #ADAPTIVE_NOT_SUPPORTED}.</li>
-   * </ul>
-   * The individual properties can be retrieved by performing a bitwise AND with
-   * {@link #FORMAT_SUPPORT_MASK} and {@link #ADAPTIVE_SUPPORT_MASK} respectively.
-   *
-   * @param format The format.
-   * @return The extent to which the renderer is capable of supporting the given format.
-   * @throws ExoPlaybackException If an error occurs.
-   */
-  protected abstract int supportsFormat(Format format) throws ExoPlaybackException;
-
-  /**
    * Enable the renderer to consume from the specified {@link TrackStream}.
    * Enable the renderer to consume from the specified {@link TrackStream}.
    *
    *
    * @param formats The enabled formats.
    * @param formats The enabled formats.
@@ -196,7 +175,8 @@ public abstract class TrackRenderer implements ExoPlayerComponent {
     Assertions.checkState(state == STATE_DISABLED);
     Assertions.checkState(state == STATE_DISABLED);
     state = STATE_ENABLED;
     state = STATE_ENABLED;
     stream = trackStream;
     stream = trackStream;
-    onEnabled(formats, trackStream, positionUs, joining);
+    onEnabled(formats, joining);
+    reset(positionUs);
   }
   }
 
 
   /**
   /**
@@ -205,13 +185,10 @@ public abstract class TrackRenderer implements ExoPlayerComponent {
    * The default implementation is a no-op.
    * The default implementation is a no-op.
    *
    *
    * @param formats The enabled formats.
    * @param formats The enabled formats.
-   * @param trackStream The track stream from which the renderer should consume.
-   * @param positionUs The player's current position.
    * @param joining Whether this renderer is being enabled to join an ongoing playback.
    * @param joining Whether this renderer is being enabled to join an ongoing playback.
    * @throws ExoPlaybackException If an error occurs.
    * @throws ExoPlaybackException If an error occurs.
    */
    */
-  protected void onEnabled(Format[] formats, TrackStream trackStream, long positionUs,
-      boolean joining) throws ExoPlaybackException {
+  protected void onEnabled(Format[] formats, boolean joining) throws ExoPlaybackException {
     // Do nothing.
     // Do nothing.
   }
   }
 
 
@@ -239,6 +216,22 @@ public abstract class TrackRenderer implements ExoPlayerComponent {
   }
   }
 
 
   /**
   /**
+   * Attempts to read and process a pending reset from the {@link TrackStream}.
+   * <p>
+   * This method may be called when the renderer is in the following states:
+   * {@link #STATE_ENABLED}, {@link #STATE_STARTED}.
+   *
+   * @throws ExoPlaybackException If an error occurs.
+   */
+  /* package */ final void checkForReset() throws ExoPlaybackException {
+    long resetPositionUs = stream.readReset();
+    if (resetPositionUs != TrackStream.NO_RESET) {
+      reset(resetPositionUs);
+      return;
+    }
+  }
+
+  /**
    * Stops the renderer.
    * Stops the renderer.
    *
    *
    * @throws ExoPlaybackException If an error occurs.
    * @throws ExoPlaybackException If an error occurs.
@@ -281,44 +274,73 @@ public abstract class TrackRenderer implements ExoPlayerComponent {
     // Do nothing.
     // Do nothing.
   }
   }
 
 
+  // Methods to be called by subclasses.
+
   /**
   /**
-   * Whether the renderer is ready for the {@link ExoPlayer} instance to transition to
-   * {@link ExoPlayer#STATE_ENDED}. The player will make this transition as soon as {@code true} is
-   * returned by all of its {@link TrackRenderer}s.
+   * Throws an error that's preventing the renderer from making progress or buffering more data at
+   * this point in time.
    * <p>
    * <p>
    * This method may be called when the renderer is in the following states:
    * This method may be called when the renderer is in the following states:
-   * {@link #STATE_ENABLED}, {@link #STATE_STARTED}.
+   * {@link #STATE_ENABLED}.
    *
    *
-   * @return Whether the renderer is ready for the player to transition to the ended state.
+   * @throws IOException An error that's preventing the renderer from making progress or buffering
+   *     more data.
    */
    */
-  protected abstract boolean isEnded();
+  protected final void maybeThrowError() throws IOException {
+    stream.maybeThrowError();
+  }
 
 
   /**
   /**
-   * Whether the renderer is able to immediately render media from the current position.
-   * <p>
-   * If the renderer is in the {@link #STATE_STARTED} state then returning true indicates that the
-   * renderer has everything that it needs to continue playback. Returning false indicates that
-   * the player should pause until the renderer is ready.
-   * <p>
-   * If the renderer is in the {@link #STATE_ENABLED} state then returning true indicates that the
-   * renderer is ready for playback to be started. Returning false indicates that it is not.
+   * Reads from the enabled upstream source.
+   *
+   * @see TrackStream#readData(FormatHolder, DecoderInputBuffer)
+   */
+  protected final int readSource(FormatHolder formatHolder, DecoderInputBuffer buffer) {
+    return stream.readData(formatHolder, buffer);
+  }
+
+  /**
+   * Returns whether the upstream source is ready.
+   *
+   * @return True if the source is ready. False otherwise.
+   */
+  protected final boolean isSourceReady() {
+    return stream.isReady();
+  }
+
+  // Abstract methods.
+
+  /**
+   * Returns the extent to which the renderer supports a given format.
    * <p>
    * <p>
-   * This method may be called when the renderer is in the following states:
-   * {@link #STATE_ENABLED}, {@link #STATE_STARTED}.
+   * The returned value is the bitwise OR of two properties:
+   * <ul>
+   * <li>The level of support for the format itself. One of {@code}link #FORMAT_HANDLED},
+   * {@link #FORMAT_EXCEEDS_CAPABILITIES}, {@link #FORMAT_UNSUPPORTED_SUBTYPE} and
+   * {@link #FORMAT_UNSUPPORTED_TYPE}.</li>
+   * <li>The level of support for adapting from the format to another format of the same mimeType.
+   * One of {@link #ADAPTIVE_SEAMLESS}, {@link #ADAPTIVE_NOT_SEAMLESS} and
+   * {@link #ADAPTIVE_NOT_SUPPORTED}.</li>
+   * </ul>
+   * The individual properties can be retrieved by performing a bitwise AND with
+   * {@link #FORMAT_SUPPORT_MASK} and {@link #ADAPTIVE_SUPPORT_MASK} respectively.
    *
    *
-   * @return True if the renderer is ready to render media. False otherwise.
+   * @param format The format.
+   * @return The extent to which the renderer is capable of supporting the given format.
+   * @throws ExoPlaybackException If an error occurs.
    */
    */
-  protected abstract boolean isReady();
+  protected abstract int supportsFormat(Format format) throws ExoPlaybackException;
 
 
   /**
   /**
-   * Attempts to read and process a pending reset from the {@link TrackStream}.
+   * Invoked when a reset is encountered, and also when the renderer is enabled.
    * <p>
    * <p>
    * This method may be called when the renderer is in the following states:
    * This method may be called when the renderer is in the following states:
    * {@link #STATE_ENABLED}, {@link #STATE_STARTED}.
    * {@link #STATE_ENABLED}, {@link #STATE_STARTED}.
    *
    *
-   * @throws ExoPlaybackException If an error occurs.
+   * @param positionUs The playback position in microseconds.
+   * @throws ExoPlaybackException If an error occurs handling the reset.
    */
    */
-  protected abstract void checkForReset() throws ExoPlaybackException;
+  protected abstract void reset(long positionUs) throws ExoPlaybackException;
 
 
   /**
   /**
    * Incrementally renders the {@link TrackStream}.
    * Incrementally renders the {@link TrackStream}.
@@ -339,16 +361,35 @@ public abstract class TrackRenderer implements ExoPlayerComponent {
       throws ExoPlaybackException;
       throws ExoPlaybackException;
 
 
   /**
   /**
-   * Throws an error that's preventing the renderer from making progress or buffering more data at
-   * this point in time.
+   * Whether the renderer is able to immediately render media from the current position.
+   * <p>
+   * If the renderer is in the {@link #STATE_STARTED} state then returning true indicates that the
+   * renderer has everything that it needs to continue playback. Returning false indicates that
+   * the player should pause until the renderer is ready.
+   * <p>
+   * If the renderer is in the {@link #STATE_ENABLED} state then returning true indicates that the
+   * renderer is ready for playback to be started. Returning false indicates that it is not.
    * <p>
    * <p>
    * This method may be called when the renderer is in the following states:
    * This method may be called when the renderer is in the following states:
-   * {@link #STATE_ENABLED}.
+   * {@link #STATE_ENABLED}, {@link #STATE_STARTED}.
    *
    *
-   * @throws IOException An error that's preventing the renderer from making progress or buffering
-   *     more data.
+   * @return True if the renderer is ready to render media. False otherwise.
    */
    */
-  protected abstract void maybeThrowError() throws IOException;
+  protected abstract boolean isReady();
+
+  /**
+   * Whether the renderer is ready for the {@link ExoPlayer} instance to transition to
+   * {@link ExoPlayer#STATE_ENDED}. The player will make this transition as soon as {@code true} is
+   * returned by all of its {@link TrackRenderer}s.
+   * <p>
+   * This method may be called when the renderer is in the following states:
+   * {@link #STATE_ENABLED}, {@link #STATE_STARTED}.
+   *
+   * @return Whether the renderer is ready for the player to transition to the ended state.
+   */
+  protected abstract boolean isEnded();
+
+  // ExoPlayerComponent implementation.
 
 
   @Override
   @Override
   public void handleMessage(int what, Object object) throws ExoPlaybackException {
   public void handleMessage(int what, Object object) throws ExoPlaybackException {

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

@@ -19,7 +19,6 @@ import com.google.android.exoplayer.DecoderInputBuffer;
 import com.google.android.exoplayer.ExoPlaybackException;
 import com.google.android.exoplayer.ExoPlaybackException;
 import com.google.android.exoplayer.Format;
 import com.google.android.exoplayer.Format;
 import com.google.android.exoplayer.FormatHolder;
 import com.google.android.exoplayer.FormatHolder;
-import com.google.android.exoplayer.SampleSourceTrackRenderer;
 import com.google.android.exoplayer.TrackRenderer;
 import com.google.android.exoplayer.TrackRenderer;
 import com.google.android.exoplayer.TrackStream;
 import com.google.android.exoplayer.TrackStream;
 import com.google.android.exoplayer.util.Assertions;
 import com.google.android.exoplayer.util.Assertions;
@@ -36,7 +35,7 @@ import java.io.IOException;
  *
  *
  * @param <T> The type of the metadata.
  * @param <T> The type of the metadata.
  */
  */
-public final class MetadataTrackRenderer<T> extends SampleSourceTrackRenderer implements Callback {
+public final class MetadataTrackRenderer<T> extends TrackRenderer implements Callback {
 
 
   /**
   /**
    * An interface for components that process metadata.
    * An interface for components that process metadata.

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

@@ -20,7 +20,6 @@ import com.google.android.exoplayer.ExoPlaybackException;
 import com.google.android.exoplayer.Format;
 import com.google.android.exoplayer.Format;
 import com.google.android.exoplayer.FormatHolder;
 import com.google.android.exoplayer.FormatHolder;
 import com.google.android.exoplayer.ParserException;
 import com.google.android.exoplayer.ParserException;
-import com.google.android.exoplayer.SampleSourceTrackRenderer;
 import com.google.android.exoplayer.TrackRenderer;
 import com.google.android.exoplayer.TrackRenderer;
 import com.google.android.exoplayer.TrackStream;
 import com.google.android.exoplayer.TrackStream;
 import com.google.android.exoplayer.util.Assertions;
 import com.google.android.exoplayer.util.Assertions;
@@ -44,7 +43,7 @@ import java.util.List;
  * {@link TextRenderer}.
  * {@link TextRenderer}.
  */
  */
 @TargetApi(16)
 @TargetApi(16)
-public final class TextTrackRenderer extends SampleSourceTrackRenderer implements Callback {
+public final class TextTrackRenderer extends TrackRenderer implements Callback {
 
 
   private static final int MSG_UPDATE_OVERLAY = 0;
   private static final int MSG_UPDATE_OVERLAY = 0;
 
 
@@ -99,9 +98,8 @@ public final class TextTrackRenderer extends SampleSourceTrackRenderer implement
   }
   }
 
 
   @Override
   @Override
-  protected void onEnabled(Format[] formats, TrackStream trackStream, long positionUs,
-      boolean joining) throws ExoPlaybackException {
-    super.onEnabled(formats, trackStream, positionUs, joining);
+  protected void onEnabled(Format[] formats, boolean joining) throws ExoPlaybackException {
+    super.onEnabled(formats, joining);
     parser = parserFactory.createParser(formats[0]);
     parser = parserFactory.createParser(formats[0]);
     parser.start();
     parser.start();
   }
   }
@@ -120,9 +118,7 @@ public final class TextTrackRenderer extends SampleSourceTrackRenderer implement
     }
     }
     nextInputBuffer = null;
     nextInputBuffer = null;
     clearTextRenderer();
     clearTextRenderer();
-    if (parser != null) {
-      parser.flush();
-    }
+    parser.flush();
   }
   }
 
 
   @Override
   @Override
@@ -215,10 +211,8 @@ public final class TextTrackRenderer extends SampleSourceTrackRenderer implement
       nextSubtitle.release();
       nextSubtitle.release();
       nextSubtitle = null;
       nextSubtitle = null;
     }
     }
-    if (parser != null) {
-      parser.release();
-      parser = null;
-    }
+    parser.release();
+    parser = null;
     nextInputBuffer = null;
     nextInputBuffer = null;
     clearTextRenderer();
     clearTextRenderer();
     super.onDisabled();
     super.onDisabled();

library/src/main/java/com/google/android/exoplayer/text/eia608/Eia608TrackRenderer.java

@@ -20,7 +20,6 @@ import com.google.android.exoplayer.DecoderInputBuffer;
 import com.google.android.exoplayer.ExoPlaybackException;
 import com.google.android.exoplayer.ExoPlaybackException;
 import com.google.android.exoplayer.Format;
 import com.google.android.exoplayer.Format;
 import com.google.android.exoplayer.FormatHolder;
 import com.google.android.exoplayer.FormatHolder;
-import com.google.android.exoplayer.SampleSourceTrackRenderer;
 import com.google.android.exoplayer.TrackRenderer;
 import com.google.android.exoplayer.TrackRenderer;
 import com.google.android.exoplayer.TrackStream;
 import com.google.android.exoplayer.TrackStream;
 import com.google.android.exoplayer.text.Cue;
 import com.google.android.exoplayer.text.Cue;
@@ -39,7 +38,7 @@ import java.util.TreeSet;
 /**
 /**
  * A {@link TrackRenderer} for EIA-608 closed captions in a media stream.
  * A {@link TrackRenderer} for EIA-608 closed captions in a media stream.
  */
  */
-public final class Eia608TrackRenderer extends SampleSourceTrackRenderer implements Callback {
+public final class Eia608TrackRenderer extends TrackRenderer implements Callback {
 
 
   private static final int MSG_INVOKE_RENDERER = 0;
   private static final int MSG_INVOKE_RENDERER = 0;