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Exclude failing playlist before the HlsMediaPeriod has been prepared

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PiperOrigin-RevId: 386521255
This commit is contained in:
bachinger 2021-07-23 21:33:48 +01:00
parent 33fa987b32
commit 351275587e
1 changed files with 52 additions and 3 deletions
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55
library/hls/src/main/java/com/google/android/exoplayer2/source/hls/playlist/DefaultHlsPlaylistTracker.java
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@ -44,9 +44,9 @@ import com.google.android.exoplayer2.util.Assertions;
import com.google.android.exoplayer2.util.Util;
import com.google.common.collect.Iterables;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.concurrent.CopyOnWriteArrayList;
/** Default implementation for {@link HlsPlaylistTracker}. */
public final class DefaultHlsPlaylistTracker
@ -65,7 +65,7 @@ public final class DefaultHlsPlaylistTracker
private final HlsPlaylistParserFactory playlistParserFactory;
private final LoadErrorHandlingPolicy loadErrorHandlingPolicy;
private final HashMap<Uri, MediaPlaylistBundle> playlistBundles;
private final List<PlaylistEventListener> listeners;
private final CopyOnWriteArrayList<PlaylistEventListener> listeners;
private final double playlistStuckTargetDurationCoefficient;
@Nullable private EventDispatcher eventDispatcher;
@ -116,7 +116,7 @@ public final class DefaultHlsPlaylistTracker
this.playlistParserFactory = playlistParserFactory;
this.loadErrorHandlingPolicy = loadErrorHandlingPolicy;
this.playlistStuckTargetDurationCoefficient = playlistStuckTargetDurationCoefficient;
listeners = new ArrayList<>();
listeners = new CopyOnWriteArrayList<>();
playlistBundles = new HashMap<>();
initialStartTimeUs = C.TIME_UNSET;
}
@ -252,6 +252,8 @@ public final class DefaultHlsPlaylistTracker
}
this.masterPlaylist = masterPlaylist;
primaryMediaPlaylistUrl = masterPlaylist.variants.get(0).url;
// Add a temporary playlist listener for loading the first primary playlist.
listeners.add(new FirstPrimaryMediaPlaylistListener());
createBundles(masterPlaylist.mediaPlaylistUrls);
LoadEventInfo loadEventInfo =
new LoadEventInfo(
@ -805,4 +807,51 @@ public final class DefaultHlsPlaylistTracker
return playlistUrl.equals(primaryMediaPlaylistUrl) && !maybeSelectNewPrimaryUrl();
}
}
/**
* Takes care of handling load errors of the first media playlist and applies exclusion according
* to the {@link LoadErrorHandlingPolicy} before the first media period has been created and
* prepared.
*/
private class FirstPrimaryMediaPlaylistListener implements PlaylistEventListener {
@Override
public void onPlaylistChanged() {
// Remove the temporary playlist listener that is waiting for the first playlist only.
listeners.remove(this);
}
@Override
public boolean onPlaylistError(Uri url, LoadErrorInfo loadErrorInfo, boolean forceRetry) {
if (primaryMediaPlaylistSnapshot == null) {
long nowMs = SystemClock.elapsedRealtime();
int variantExclusionCounter = 0;
List<Variant> variants = castNonNull(masterPlaylist).variants;
for (int i = 0; i < variants.size(); i++) {
@Nullable
MediaPlaylistBundle mediaPlaylistBundle = playlistBundles.get(variants.get(i).url);
if (mediaPlaylistBundle != null && nowMs < mediaPlaylistBundle.excludeUntilMs) {
variantExclusionCounter++;
}
}
LoadErrorHandlingPolicy.FallbackOptions fallbackOptions =
new LoadErrorHandlingPolicy.FallbackOptions(
/* numberOfLocations= */ 1,
/* numberOfExcludedLocations= */ 0,
/* numberOfTracks= */ masterPlaylist.variants.size(),
/* numberOfExcludedTracks= */ variantExclusionCounter);
@Nullable
LoadErrorHandlingPolicy.FallbackSelection fallbackSelection =
loadErrorHandlingPolicy.getFallbackSelectionFor(fallbackOptions, loadErrorInfo);
if (fallbackSelection != null
&& fallbackSelection.type == LoadErrorHandlingPolicy.FALLBACK_TYPE_TRACK) {
@Nullable MediaPlaylistBundle mediaPlaylistBundle = playlistBundles.get(url);
if (mediaPlaylistBundle != null) {
mediaPlaylistBundle.excludePlaylist(fallbackSelection.exclusionDurationMs);
}
}
}
return false;
}
}
}