Move positionUs parameter from createPeriod to prepare

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=158494794

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

@@ -159,12 +159,12 @@ public final class ImaAdsMediaSource implements MediaSource {
   }
 
   @Override
-  public MediaPeriod createPeriod(int index, Allocator allocator, long positionUs) {
+  public MediaPeriod createPeriod(int index, Allocator allocator) {
     if (timeline.isPeriodAd(index)) {
       int adBreakIndex = timeline.getAdBreakIndex(index);
       int adIndexInAdBreak = timeline.getAdIndexInAdBreak(index);
       if (adIndexInAdBreak >= adBreakMediaSources[adBreakIndex].length) {
-        DeferredMediaPeriod deferredPeriod = new DeferredMediaPeriod(0, allocator, positionUs);
+        DeferredMediaPeriod deferredPeriod = new DeferredMediaPeriod(0, allocator);
         if (adIndexInAdBreak >= adBreakDeferredMediaPeriods[adBreakIndex].length) {
           adBreakDeferredMediaPeriods[adBreakIndex] = Arrays.copyOf(
               adBreakDeferredMediaPeriods[adBreakIndex], adIndexInAdBreak + 1);
@@ -174,15 +174,13 @@ public final class ImaAdsMediaSource implements MediaSource {
       }
 
       MediaSource adBreakMediaSource = adBreakMediaSources[adBreakIndex][adIndexInAdBreak];
-      MediaPeriod adBreakMediaPeriod = adBreakMediaSource.createPeriod(0, allocator, positionUs);
+      MediaPeriod adBreakMediaPeriod = adBreakMediaSource.createPeriod(0, allocator);
       mediaSourceByMediaPeriod.put(adBreakMediaPeriod, adBreakMediaSource);
       return adBreakMediaPeriod;
     } else {
       long startUs = timeline.getContentStartTimeUs(index);
       long endUs = timeline.getContentEndTimeUs(index);
-      long contentStartUs = startUs + positionUs;
-      MediaPeriod contentMediaPeriod = contentMediaSource.createPeriod(0, allocator,
-          contentStartUs);
+      MediaPeriod contentMediaPeriod = contentMediaSource.createPeriod(0, allocator);
       ClippingMediaPeriod clippingPeriod = new ClippingMediaPeriod(contentMediaPeriod);
       clippingPeriod.setClipping(startUs, endUs == C.TIME_UNSET ? C.TIME_END_OF_SOURCE : endUs);
       mediaSourceByMediaPeriod.put(contentMediaPeriod, contentMediaSource);
@@ -436,29 +434,29 @@ public final class ImaAdsMediaSource implements MediaSource {
 
     private final int index;
     private final Allocator allocator;
-    private final long positionUs;
 
     public MediaPeriod mediaPeriod;
     private MediaPeriod.Callback callback;
+    private long positionUs;
 
-    public DeferredMediaPeriod(int index, Allocator allocator, long positionUs) {
+    public DeferredMediaPeriod(int index, Allocator allocator) {
       this.index = index;
       this.allocator = allocator;
-      this.positionUs = positionUs;
     }
 
     public void setMediaSource(MediaSource mediaSource) {
-      mediaPeriod = mediaSource.createPeriod(index, allocator, positionUs);
+      mediaPeriod = mediaSource.createPeriod(index, allocator);
       if (callback != null) {
-        mediaPeriod.prepare(this);
+        mediaPeriod.prepare(this, positionUs);
       }
     }
 
     @Override
-    public void prepare(Callback callback) {
+    public void prepare(Callback callback, long positionUs) {
       this.callback = callback;
+      this.positionUs = positionUs;
       if (mediaPeriod != null) {
-        mediaPeriod.prepare(this);
+        mediaPeriod.prepare(this, positionUs);
       }
     }
 

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

@@ -535,11 +535,10 @@ public final class ExoPlayerTest extends TestCase {
     }
 
     @Override
-    public MediaPeriod createPeriod(int index, Allocator allocator, long positionUs) {
+    public MediaPeriod createPeriod(int index, Allocator allocator) {
       Assertions.checkIndex(index, 0, timeline.getPeriodCount());
       assertTrue(preparedSource);
       assertFalse(releasedSource);
-      assertEquals(0, positionUs);
       FakeMediaPeriod mediaPeriod = new FakeMediaPeriod(trackGroupArray);
       activeMediaPeriods.add(mediaPeriod);
       return mediaPeriod;
@@ -583,8 +582,9 @@ public final class ExoPlayerTest extends TestCase {
     }
 
     @Override
-    public void prepare(Callback callback) {
+    public void prepare(Callback callback, long positionUs) {
       assertFalse(preparedPeriod);
+      assertEquals(0, positionUs);
       preparedPeriod = true;
       callback.onPrepared(this);
     }

library/core/src/androidTest/java/com/google/android/exoplayer2/TimelineTest.java

@@ -87,7 +87,7 @@ public class TimelineTest extends TestCase {
       }
 
       @Override
-      public MediaPeriod createPeriod(int index, Allocator allocator, long positionUs) {
+      public MediaPeriod createPeriod(int index, Allocator allocator) {
         return null;
       }
 

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

@@ -1352,7 +1352,7 @@ import java.io.IOException;
       loadingPeriodHolder.next = newPeriodHolder;
     }
     loadingPeriodHolder = newPeriodHolder;
-    loadingPeriodHolder.mediaPeriod.prepare(this);
+    loadingPeriodHolder.mediaPeriod.prepare(this, newLoadingPeriodStartPositionUs);
     setIsLoading(true);
   }
 
@@ -1528,8 +1528,7 @@ import java.io.IOException;
       this.startPositionUs = startPositionUs;
       sampleStreams = new SampleStream[renderers.length];
       mayRetainStreamFlags = new boolean[renderers.length];
-      mediaPeriod = mediaSource.createPeriod(periodIndex, loadControl.getAllocator(),
-          startPositionUs);
+      mediaPeriod = mediaSource.createPeriod(periodIndex, loadControl.getAllocator());
     }
 
     public long toRendererTime(long periodTimeUs) {

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

@@ -68,9 +68,9 @@ public final class ClippingMediaPeriod implements MediaPeriod, MediaPeriod.Callb
   }
 
   @Override
-  public void prepare(MediaPeriod.Callback callback) {
+  public void prepare(MediaPeriod.Callback callback, long positionUs) {
     this.callback = callback;
-    mediaPeriod.prepare(this);
+    mediaPeriod.prepare(this, startUs + positionUs);
   }
 
   @Override

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

@@ -69,9 +69,9 @@ public final class ClippingMediaSource implements MediaSource, MediaSource.Liste
   }
 
   @Override
-  public MediaPeriod createPeriod(int index, Allocator allocator, long positionUs) {
-    ClippingMediaPeriod mediaPeriod = new ClippingMediaPeriod(
-        mediaSource.createPeriod(index, allocator, startUs + positionUs));
+  public MediaPeriod createPeriod(int index, Allocator allocator) {
+    ClippingMediaPeriod mediaPeriod =
+        new ClippingMediaPeriod(mediaSource.createPeriod(index, allocator));
     mediaPeriods.add(mediaPeriod);
     mediaPeriod.setClipping(clippingTimeline.startUs, clippingTimeline.endUs);
     return mediaPeriod;

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

@@ -91,11 +91,11 @@ public final class ConcatenatingMediaSource implements MediaSource {
   }
 
   @Override
-  public MediaPeriod createPeriod(int index, Allocator allocator, long positionUs) {
+  public MediaPeriod createPeriod(int index, Allocator allocator) {
     int sourceIndex = timeline.getChildIndexForPeriod(index);
     int periodIndexInSource = index - timeline.getFirstPeriodIndexInChild(sourceIndex);
-    MediaPeriod mediaPeriod = mediaSources[sourceIndex].createPeriod(periodIndexInSource, allocator,
-        positionUs);
+    MediaPeriod mediaPeriod =
+        mediaSources[sourceIndex].createPeriod(periodIndexInSource, allocator);
     sourceIndexByMediaPeriod.put(mediaPeriod, sourceIndex);
     return mediaPeriod;
   }

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

@@ -159,7 +159,7 @@ import java.io.IOException;
   }
 
   @Override
-  public void prepare(Callback callback) {
+  public void prepare(Callback callback, long positionUs) {
     this.callback = callback;
     loadCondition.open();
     startLoading();

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

@@ -156,7 +156,7 @@ public final class ExtractorMediaSource implements MediaSource, MediaSource.List
   }
 
   @Override
-  public MediaPeriod createPeriod(int index, Allocator allocator, long positionUs) {
+  public MediaPeriod createPeriod(int index, Allocator allocator) {
     Assertions.checkArgument(index == 0);
     return new ExtractorMediaPeriod(uri, dataSourceFactory.createDataSource(),
         extractorsFactory.createExtractors(), minLoadableRetryCount, eventHandler, eventListener,

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

@@ -76,10 +76,10 @@ public final class LoopingMediaSource implements MediaSource {
   }
 
   @Override
-  public MediaPeriod createPeriod(int index, Allocator allocator, long positionUs) {
+  public MediaPeriod createPeriod(int index, Allocator allocator) {
     return loopCount != Integer.MAX_VALUE
-        ? childSource.createPeriod(index % childPeriodCount, allocator, positionUs)
-        : childSource.createPeriod(index, allocator, positionUs);
+        ? childSource.createPeriod(index % childPeriodCount, allocator)
+        : childSource.createPeriod(index, allocator);
   }
 
   @Override

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

@@ -55,8 +55,10 @@ public interface MediaPeriod extends SequenceableLoader {
    *
    * @param callback Callback to receive updates from this period, including being notified when
    *     preparation completes.
+   * @param positionUs The position in microseconds relative to the start of the period at which to
+   *     start loading data.
    */
-  void prepare(Callback callback);
+  void prepare(Callback callback, long positionUs);
 
   /**
    * Throws an error that's preventing the period from becoming prepared. Does nothing if no such
@@ -162,9 +164,9 @@ public interface MediaPeriod extends SequenceableLoader {
    * This method may be called both during and after the period has been prepared.
    * <p>
    * A period may call {@link Callback#onContinueLoadingRequested(SequenceableLoader)} on the
-   * {@link Callback} passed to {@link #prepare(Callback)} to request that this method be called
-   * when the period is permitted to continue loading data. A period may do this both during and
-   * after preparation.
+   * {@link Callback} passed to {@link #prepare(Callback, long)} to request that this method be
+   * called when the period is permitted to continue loading data. A period may do this both during
+   * and after preparation.
    *
    * @param positionUs The current playback position.
    * @return True if progress was made, meaning that {@link #getNextLoadPositionUs()} will return

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

@@ -64,10 +64,9 @@ public interface MediaSource {
    *
    * @param index The index of the period.
    * @param allocator An {@link Allocator} from which to obtain media buffer allocations.
-   * @param positionUs The player's current playback position.
    * @return A new {@link MediaPeriod}.
    */
-  MediaPeriod createPeriod(int index, Allocator allocator, long positionUs);
+  MediaPeriod createPeriod(int index, Allocator allocator);
 
   /**
    * Releases the period.

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

@@ -44,11 +44,11 @@ import java.util.IdentityHashMap;
   }
 
   @Override
-  public void prepare(Callback callback) {
+  public void prepare(Callback callback, long positionUs) {
     this.callback = callback;
     pendingChildPrepareCount = periods.length;
     for (MediaPeriod period : periods) {
-      period.prepare(this);
+      period.prepare(this, positionUs);
     }
   }
 

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

@@ -116,10 +116,10 @@ public final class MergingMediaSource implements MediaSource {
   }
 
   @Override
-  public MediaPeriod createPeriod(int index, Allocator allocator, long positionUs) {
+  public MediaPeriod createPeriod(int index, Allocator allocator) {
     MediaPeriod[] periods = new MediaPeriod[mediaSources.length];
     for (int i = 0; i < periods.length; i++) {
-      periods[i] = mediaSources[i].createPeriod(index, allocator, positionUs);
+      periods[i] = mediaSources[i].createPeriod(index, allocator);
     }
     return new MergingMediaPeriod(periods);
   }

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

@@ -79,7 +79,7 @@ import java.util.Arrays;
   }
 
   @Override
-  public void prepare(Callback callback) {
+  public void prepare(Callback callback, long positionUs) {
     callback.onPrepared(this);
   }
 

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

@@ -95,7 +95,7 @@ public final class SingleSampleMediaSource implements MediaSource {
   }
 
   @Override
-  public MediaPeriod createPeriod(int index, Allocator allocator, long positionUs) {
+  public MediaPeriod createPeriod(int index, Allocator allocator) {
     Assertions.checkArgument(index == 0);
     return new SingleSampleMediaPeriod(uri, dataSourceFactory, format, minLoadableRetryCount,
         eventHandler, eventListener, eventSourceId);

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

@@ -106,7 +106,7 @@ import java.util.List;
   }
 
   @Override
-  public void prepare(Callback callback) {
+  public void prepare(Callback callback, long positionUs) {
     this.callback = callback;
     callback.onPrepared(this);
   }

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

@@ -281,7 +281,7 @@ public final class DashMediaSource implements MediaSource {
   }
 
   @Override
-  public MediaPeriod createPeriod(int periodIndex, Allocator allocator, long positionUs) {
+  public MediaPeriod createPeriod(int periodIndex, Allocator allocator) {
     EventDispatcher periodEventDispatcher = eventDispatcher.copyWithMediaTimeOffsetMs(
         manifest.getPeriod(periodIndex).startMs);
     DashMediaPeriod mediaPeriod = new DashMediaPeriod(firstPeriodId + periodIndex, manifest,

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

@@ -51,7 +51,6 @@ public final class HlsMediaPeriod implements MediaPeriod, HlsSampleStreamWrapper
   private final IdentityHashMap<SampleStream, Integer> streamWrapperIndices;
   private final TimestampAdjusterProvider timestampAdjusterProvider;
   private final Handler continueLoadingHandler;
-  private final long preparePositionUs;
 
   private Callback callback;
   private int pendingPrepareCount;
@@ -62,8 +61,7 @@ public final class HlsMediaPeriod implements MediaPeriod, HlsSampleStreamWrapper
   private CompositeSequenceableLoader sequenceableLoader;
 
   public HlsMediaPeriod(HlsPlaylistTracker playlistTracker, HlsDataSourceFactory dataSourceFactory,
-      int minLoadableRetryCount, EventDispatcher eventDispatcher, Allocator allocator,
-      long positionUs) {
+      int minLoadableRetryCount, EventDispatcher eventDispatcher, Allocator allocator) {
     this.playlistTracker = playlistTracker;
     this.dataSourceFactory = dataSourceFactory;
     this.minLoadableRetryCount = minLoadableRetryCount;
@@ -72,7 +70,6 @@ public final class HlsMediaPeriod implements MediaPeriod, HlsSampleStreamWrapper
     streamWrapperIndices = new IdentityHashMap<>();
     timestampAdjusterProvider = new TimestampAdjusterProvider();
     continueLoadingHandler = new Handler();
-    preparePositionUs = positionUs;
   }
 
   public void release() {
@@ -86,10 +83,10 @@ public final class HlsMediaPeriod implements MediaPeriod, HlsSampleStreamWrapper
   }
 
   @Override
-  public void prepare(Callback callback) {
+  public void prepare(Callback callback, long positionUs) {
     playlistTracker.addListener(this);
     this.callback = callback;
-    buildAndPrepareSampleStreamWrappers();
+    buildAndPrepareSampleStreamWrappers(positionUs);
   }
 
   @Override
@@ -285,7 +282,7 @@ public final class HlsMediaPeriod implements MediaPeriod, HlsSampleStreamWrapper
 
   // Internal methods.
 
-  private void buildAndPrepareSampleStreamWrappers() {
+  private void buildAndPrepareSampleStreamWrappers(long positionUs) {
     HlsMasterPlaylist masterPlaylist = playlistTracker.getMasterPlaylist();
     // Build the default stream wrapper.
     List<HlsUrl> selectedVariants = new ArrayList<>(masterPlaylist.variants);
@@ -322,7 +319,7 @@ public final class HlsMediaPeriod implements MediaPeriod, HlsSampleStreamWrapper
     HlsUrl[] variants = new HlsMasterPlaylist.HlsUrl[selectedVariants.size()];
     selectedVariants.toArray(variants);
     HlsSampleStreamWrapper sampleStreamWrapper = buildSampleStreamWrapper(C.TRACK_TYPE_DEFAULT,
-        variants, masterPlaylist.muxedAudioFormat, masterPlaylist.muxedCaptionFormats);
+        variants, masterPlaylist.muxedAudioFormat, masterPlaylist.muxedCaptionFormats, positionUs);
     sampleStreamWrappers[currentWrapperIndex++] = sampleStreamWrapper;
     sampleStreamWrapper.setIsTimestampMaster(true);
     sampleStreamWrapper.continuePreparing();
@@ -332,7 +329,7 @@ public final class HlsMediaPeriod implements MediaPeriod, HlsSampleStreamWrapper
     // Build audio stream wrappers.
     for (int i = 0; i < audioRenditions.size(); i++) {
       sampleStreamWrapper = buildSampleStreamWrapper(C.TRACK_TYPE_AUDIO,
-          new HlsUrl[] {audioRenditions.get(i)}, null, Collections.<Format>emptyList());
+          new HlsUrl[] {audioRenditions.get(i)}, null, Collections.<Format>emptyList(), positionUs);
       sampleStreamWrappers[currentWrapperIndex++] = sampleStreamWrapper;
       sampleStreamWrapper.continuePreparing();
     }
@@ -341,18 +338,18 @@ public final class HlsMediaPeriod implements MediaPeriod, HlsSampleStreamWrapper
     for (int i = 0; i < subtitleRenditions.size(); i++) {
       HlsUrl url = subtitleRenditions.get(i);
       sampleStreamWrapper = buildSampleStreamWrapper(C.TRACK_TYPE_TEXT, new HlsUrl[] {url}, null,
-          Collections.<Format>emptyList());
+          Collections.<Format>emptyList(), positionUs);
       sampleStreamWrapper.prepareSingleTrack(url.format);
       sampleStreamWrappers[currentWrapperIndex++] = sampleStreamWrapper;
     }
   }
 
   private HlsSampleStreamWrapper buildSampleStreamWrapper(int trackType, HlsUrl[] variants,
-      Format muxedAudioFormat, List<Format> muxedCaptionFormats) {
+      Format muxedAudioFormat, List<Format> muxedCaptionFormats, long positionUs) {
     HlsChunkSource defaultChunkSource = new HlsChunkSource(playlistTracker, variants,
         dataSourceFactory, timestampAdjusterProvider, muxedCaptionFormats);
-    return new HlsSampleStreamWrapper(trackType, this, defaultChunkSource, allocator,
-        preparePositionUs, muxedAudioFormat, minLoadableRetryCount, eventDispatcher);
+    return new HlsSampleStreamWrapper(trackType, this, defaultChunkSource, allocator, positionUs,
+        muxedAudioFormat, minLoadableRetryCount, eventDispatcher);
   }
 
   private void continuePreparingOrLoading() {

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

@@ -88,10 +88,10 @@ public final class HlsMediaSource implements MediaSource,
   }
 
   @Override
-  public MediaPeriod createPeriod(int index, Allocator allocator, long positionUs) {
+  public MediaPeriod createPeriod(int index, Allocator allocator) {
     Assertions.checkArgument(index == 0);
     return new HlsMediaPeriod(playlistTracker, dataSourceFactory, minLoadableRetryCount,
-        eventDispatcher, allocator, positionUs);
+        eventDispatcher, allocator);
   }
 
   @Override

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

@@ -93,7 +93,7 @@ import java.util.ArrayList;
   }
 
   @Override
-  public void prepare(Callback callback) {
+  public void prepare(Callback callback, long positionUs) {
     this.callback = callback;
     callback.onPrepared(this);
   }

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

@@ -222,7 +222,7 @@ public final class SsMediaSource implements MediaSource,
   }
 
   @Override
-  public MediaPeriod createPeriod(int index, Allocator allocator, long positionUs) {
+  public MediaPeriod createPeriod(int index, Allocator allocator) {
     Assertions.checkArgument(index == 0);
     SsMediaPeriod period = new SsMediaPeriod(manifest, chunkSourceFactory, minLoadableRetryCount,
         eventDispatcher, manifestLoaderErrorThrower, allocator);