Propagate playback position through LoadControl shouldContinueLoading.

PiperOrigin-RevId: 304420177

RELEASENOTES.md

@@ -3,6 +3,7 @@
 ### dev-v2 (not yet released) ###
 
 *   Core library:
+    *   Add playbackPositionUs parameter to 'LoadControl.shouldContinueLoading'.
     *   The `DefaultLoadControl` default minimum buffer is set to 50 seconds,
         equal to the default maximum buffer. `DefaultLoadControl` applies the
         same behavior for audio and video.

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

@@ -1945,9 +1945,16 @@ import java.util.concurrent.atomic.AtomicBoolean;
     if (!isLoadingPossible()) {
       return false;
     }
+    MediaPeriodHolder loadingPeriodHolder = queue.getLoadingPeriod();
     long bufferedDurationUs =
-        getTotalBufferedDurationUs(queue.getLoadingPeriod().getNextLoadPositionUs());
-    return loadControl.shouldContinueLoading(bufferedDurationUs, mediaClock.getPlaybackSpeed());
+        getTotalBufferedDurationUs(loadingPeriodHolder.getNextLoadPositionUs());
+    long playbackPositionUs =
+        loadingPeriodHolder == queue.getPlayingPeriod()
+            ? loadingPeriodHolder.toPeriodTime(rendererPositionUs)
+            : loadingPeriodHolder.toPeriodTime(rendererPositionUs)
+                - loadingPeriodHolder.info.startPositionUs;
+    return loadControl.shouldContinueLoading(
+        playbackPositionUs, bufferedDurationUs, mediaClock.getPlaybackSpeed());
   }
 
   private boolean isLoadingPossible() {

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

@@ -87,14 +87,28 @@ public interface LoadControl {
    */
   boolean retainBackBufferFromKeyframe();
 
+  /** @deprecated Use {@link LoadControl#shouldContinueLoading(long, long, float)}. */
+  @Deprecated
+  default boolean shouldContinueLoading(long bufferedDurationUs, float playbackSpeed) {
+    return false;
+  }
+
   /**
    * Called by the player to determine whether it should continue to load the source.
    *
+   * @param playbackPositionUs The current playback position in microseconds, relative to the start
+   *     of the {@link Timeline.Period period} that will continue to be loaded if this method
+   *     returns {@code true}. If the playback for this period has not yet started, the value will
+   *     negative and equal in magnitude to the duration of any media in previous periods still to
+   *     be played.
    * @param bufferedDurationUs The duration of media that's currently buffered.
    * @param playbackSpeed The current playback speed.
    * @return Whether the loading should continue.
    */
-  boolean shouldContinueLoading(long bufferedDurationUs, float playbackSpeed);
+  default boolean shouldContinueLoading(
+      long playbackPositionUs, long bufferedDurationUs, float playbackSpeed) {
+    return shouldContinueLoading(bufferedDurationUs, playbackSpeed);
+  }
 
   /**
    * Called repeatedly by the player when it's loading the source, has yet to start playback, and