Inject toKeyframe discard parameter from ExoPlayerImplInternal

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=175805139

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

@@ -541,7 +541,7 @@ import java.io.IOException;
     TraceUtil.beginSection("doSomeWork");
 
     updatePlaybackPositions();
-    playingPeriodHolder.mediaPeriod.discardBuffer(playbackInfo.positionUs);
+    playingPeriodHolder.mediaPeriod.discardBuffer(playbackInfo.positionUs, false);
 
     boolean allRenderersEnded = true;
     boolean allRenderersReadyOrEnded = true;
@@ -732,7 +732,7 @@ import java.io.IOException;
       setPlayingPeriodHolder(newPlayingPeriodHolder);
       if (playingPeriodHolder.hasEnabledTracks) {
         periodPositionUs = playingPeriodHolder.mediaPeriod.seekToUs(periodPositionUs);
-        playingPeriodHolder.mediaPeriod.discardBuffer(periodPositionUs);
+        playingPeriodHolder.mediaPeriod.discardBuffer(periodPositionUs, false);
       }
       resetRendererPosition(periodPositionUs);
       maybeContinueLoading();

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

@@ -121,8 +121,8 @@ public final class ClippingMediaPeriod implements MediaPeriod, MediaPeriod.Callb
   }
 
   @Override
-  public void discardBuffer(long positionUs) {
-    mediaPeriod.discardBuffer(positionUs + startUs);
+  public void discardBuffer(long positionUs, boolean toKeyframe) {
+    mediaPeriod.discardBuffer(positionUs + startUs, toKeyframe);
   }
 
   @Override

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

@@ -824,8 +824,8 @@ public final class DynamicConcatenatingMediaSource implements MediaSource, ExoPl
     }
 
     @Override
-    public void discardBuffer(long positionUs) {
-      mediaPeriod.discardBuffer(positionUs);
+    public void discardBuffer(long positionUs, boolean toKeyframe) {
+      mediaPeriod.discardBuffer(positionUs, toKeyframe);
     }
 
     @Override

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

@@ -276,10 +276,10 @@ import java.util.Arrays;
   }
 
   @Override
-  public void discardBuffer(long positionUs) {
+  public void discardBuffer(long positionUs, boolean toKeyframe) {
     int trackCount = sampleQueues.length;
     for (int i = 0; i < trackCount; i++) {
-      sampleQueues[i].discardTo(positionUs, false, trackEnabledStates[i]);
+      sampleQueues[i].discardTo(positionUs, toKeyframe, trackEnabledStates[i]);
     }
   }
 

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

@@ -116,8 +116,10 @@ public interface MediaPeriod extends SequenceableLoader {
    * This method should only be called after the period has been prepared.
    *
    * @param positionUs The position in microseconds.
+   * @param toKeyframe If true then for each track discards samples up to the keyframe before or at
+   *     the specified position, rather than any sample before or at that position.
    */
-  void discardBuffer(long positionUs);
+  void discardBuffer(long positionUs, boolean toKeyframe);
 
   /**
    * Attempts to read a discontinuity.

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

@@ -129,9 +129,9 @@ import java.util.IdentityHashMap;
   }
 
   @Override
-  public void discardBuffer(long positionUs) {
+  public void discardBuffer(long positionUs, boolean toKeyframe) {
     for (MediaPeriod period : enabledPeriods) {
-      period.discardBuffer(positionUs);
+      period.discardBuffer(positionUs, toKeyframe);
     }
   }
 

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

@@ -116,7 +116,7 @@ import java.util.Arrays;
   }
 
   @Override
-  public void discardBuffer(long positionUs) {
+  public void discardBuffer(long positionUs, boolean toKeyframe) {
     // Do nothing.
   }
 

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

@@ -114,11 +114,13 @@ public class ChunkSampleStream<T extends ChunkSource> implements SampleStream, S
    * Discards buffered media up to the specified position.
    *
    * @param positionUs The position to discard up to, in microseconds.
+   * @param toKeyframe If true then for each track discards samples up to the keyframe before or at
+   *     the specified position, rather than any sample before or at that position.
    */
-  public void discardBuffer(long positionUs) {
-    primarySampleQueue.discardTo(positionUs, false, true);
+  public void discardBuffer(long positionUs, boolean toKeyframe) {
+    primarySampleQueue.discardTo(positionUs, toKeyframe, true);
     for (int i = 0; i < embeddedSampleQueues.length; i++) {
-      embeddedSampleQueues[i].discardTo(positionUs, true, embeddedTracksSelected[i]);
+      embeddedSampleQueues[i].discardTo(positionUs, toKeyframe, embeddedTracksSelected[i]);
     }
     discardDownstreamMediaChunks(primarySampleQueue.getFirstIndex());
   }

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

@@ -259,9 +259,9 @@ import java.util.Map;
   }
 
   @Override
-  public void discardBuffer(long positionUs) {
+  public void discardBuffer(long positionUs, boolean toKeyframe) {
     for (ChunkSampleStream<DashChunkSource> sampleStream : sampleStreams) {
-      sampleStream.discardBuffer(positionUs);
+      sampleStream.discardBuffer(positionUs, toKeyframe);
     }
   }
 

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

@@ -183,9 +183,9 @@ public final class HlsMediaPeriod implements MediaPeriod, HlsSampleStreamWrapper
   }
 
   @Override
-  public void discardBuffer(long positionUs) {
+  public void discardBuffer(long positionUs, boolean toKeyframe) {
     for (HlsSampleStreamWrapper sampleStreamWrapper : enabledSampleStreamWrappers) {
-      sampleStreamWrapper.discardBuffer(positionUs);
+      sampleStreamWrapper.discardBuffer(positionUs, toKeyframe);
     }
   }
 

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

@@ -291,10 +291,10 @@ import java.util.LinkedList;
     return seekRequired;
   }
 
-  public void discardBuffer(long positionUs) {
+  public void discardBuffer(long positionUs, boolean toKeyframe) {
     int sampleQueueCount = sampleQueues.length;
     for (int i = 0; i < sampleQueueCount; i++) {
-      sampleQueues[i].discardTo(positionUs, false, sampleQueuesEnabledStates[i]);
+      sampleQueues[i].discardTo(positionUs, toKeyframe, sampleQueuesEnabledStates[i]);
     }
   }
 

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

@@ -138,9 +138,9 @@ import java.util.ArrayList;
   }
 
   @Override
-  public void discardBuffer(long positionUs) {
+  public void discardBuffer(long positionUs, boolean toKeyframe) {
     for (ChunkSampleStream<SsChunkSource> sampleStream : sampleStreams) {
-      sampleStream.discardBuffer(positionUs);
+      sampleStream.discardBuffer(positionUs, toKeyframe);
     }
   }
 

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

@@ -85,7 +85,7 @@ public class FakeMediaPeriod implements MediaPeriod {
   }
 
   @Override
-  public void discardBuffer(long positionUs) {
+  public void discardBuffer(long positionUs, boolean toKeyframe) {
     // Do nothing.
   }