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Ensure that ShuffleOrder has the same length as the current playlist

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Add a fail-fast check in `ExoPlayerImpl` to ensure the equality of the lengths of `ShuffleOrder` and the current playlist. Also improve the documentation of `setShuffleOrder(ShuffleOrder)` with explicit instruction on this.

Issue: androidx/media#480

#minor-release

PiperOrigin-RevId: 544009359
(cherry picked from commit d895a46b28)
This commit is contained in:
tianyifeng 2023-06-28 10:41:49 +00:00 committed by Tianyi Feng
parent f768fedaee
commit 52706b2eb4
3 changed files with 13 additions and 0 deletions
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3
libraries/exoplayer/src/main/java/androidx/media3/exoplayer/ExoPlayer.java
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@ -1469,6 +1469,9 @@ public interface ExoPlayer extends Player {
/**
* Sets the shuffle order.
*
* <p>The {@link ShuffleOrder} passed must have the same length as the current playlist ({@link
* Player#getMediaItemCount()}).
*
* @param shuffleOrder The shuffle order.
*/
@UnstableApi

1
libraries/exoplayer/src/main/java/androidx/media3/exoplayer/ExoPlayerImpl.java
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@ -765,6 +765,7 @@ import java.util.concurrent.TimeoutException;
@Override
public void setShuffleOrder(ShuffleOrder shuffleOrder) {
verifyApplicationThread();
checkArgument(shuffleOrder.getLength() == mediaSourceHolderSnapshots.size());
this.shuffleOrder = shuffleOrder;
Timeline timeline = createMaskingTimeline();
PlaybackInfo newPlaybackInfo =

9
libraries/exoplayer/src/test/java/androidx/media3/exoplayer/ExoPlayerTest.java
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@ -6955,6 +6955,15 @@ public final class ExoPlayerTest {
assertThat(capturedTimelineShuffleIndexes).isEqualTo(newShuffleOrderIndexes);
}
@Test
public void setShuffleOrder_shuffleOrderLengthNotEqualToCurrentPlaylistLength_shouldThrow() {
ExoPlayer player = new TestExoPlayerBuilder(context).build();
player.addMediaSources(ImmutableList.of(new FakeMediaSource(), new FakeMediaSource()));
assertThrows(
IllegalArgumentException.class, () -> player.setShuffleOrder(new FakeShuffleOrder(3)));
}
@Test
public void setMediaSources_empty_whenEmpty_correctMaskingMediaItemIndex() throws Exception {
final int[] currentMediaItemIndices = {C.INDEX_UNSET, C.INDEX_UNSET, C.INDEX_UNSET};