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Apply suggested changes and remove the CustomHlsPlaylistTracker class

This commit is contained in:
TiA4f8R 2022-01-20 17:07:06 +01:00
parent d0637a8832
commit e103e4817c
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GPG Key ID: E6D3E7F5949450DD
3 changed files with 22 additions and 799 deletions

View File

@ -2517,29 +2517,30 @@ public final class Player implements
Log.e(TAG, "ExoPlayer - onPlayerError() called with:", error); Log.e(TAG, "ExoPlayer - onPlayerError() called with:", error);
saveStreamProgressState(); saveStreamProgressState();
boolean isBehindLiveWindowException = false; boolean isCatchableException = false;
switch (error.type) { switch (error.type) {
case ExoPlaybackException.TYPE_SOURCE: case ExoPlaybackException.TYPE_SOURCE:
isBehindLiveWindowException = processSourceError(error.getSourceException()); isCatchableException = processSourceError(error.getSourceException());
if (!isBehindLiveWindowException) {
createErrorNotification(error);
}
break; break;
case ExoPlaybackException.TYPE_UNEXPECTED: case ExoPlaybackException.TYPE_UNEXPECTED:
createErrorNotification(error);
setRecovery(); setRecovery();
reloadPlayQueueManager(); reloadPlayQueueManager();
break; break;
case ExoPlaybackException.TYPE_REMOTE: case ExoPlaybackException.TYPE_REMOTE:
case ExoPlaybackException.TYPE_RENDERER: case ExoPlaybackException.TYPE_RENDERER:
default: default:
createErrorNotification(error);
onPlaybackShutdown(); onPlaybackShutdown();
break; break;
} }
if (fragmentListener != null && !isBehindLiveWindowException) { if (isCatchableException) {
return;
}
createErrorNotification(error);
if (fragmentListener != null) {
fragmentListener.onPlayerError(error); fragmentListener.onPlayerError(error);
} }
} }
@ -2583,11 +2584,11 @@ public final class Player implements
// Inform the user that we are reloading the stream by switching to the buffering state // Inform the user that we are reloading the stream by switching to the buffering state
onBuffering(); onBuffering();
return true; return true;
} else { }
playQueue.error(); playQueue.error();
return false; return false;
} }
}
//endregion //endregion

View File

@ -9,6 +9,7 @@ import com.google.android.exoplayer2.source.SingleSampleMediaSource;
import com.google.android.exoplayer2.source.dash.DashMediaSource; import com.google.android.exoplayer2.source.dash.DashMediaSource;
import com.google.android.exoplayer2.source.dash.DefaultDashChunkSource; import com.google.android.exoplayer2.source.dash.DefaultDashChunkSource;
import com.google.android.exoplayer2.source.hls.HlsMediaSource; import com.google.android.exoplayer2.source.hls.HlsMediaSource;
import com.google.android.exoplayer2.source.hls.playlist.DefaultHlsPlaylistTracker;
import com.google.android.exoplayer2.source.smoothstreaming.DefaultSsChunkSource; import com.google.android.exoplayer2.source.smoothstreaming.DefaultSsChunkSource;
import com.google.android.exoplayer2.source.smoothstreaming.SsMediaSource; import com.google.android.exoplayer2.source.smoothstreaming.SsMediaSource;
import com.google.android.exoplayer2.upstream.DataSource; import com.google.android.exoplayer2.upstream.DataSource;
@ -16,12 +17,13 @@ import com.google.android.exoplayer2.upstream.DefaultDataSourceFactory;
import com.google.android.exoplayer2.upstream.DefaultLoadErrorHandlingPolicy; import com.google.android.exoplayer2.upstream.DefaultLoadErrorHandlingPolicy;
import com.google.android.exoplayer2.upstream.TransferListener; import com.google.android.exoplayer2.upstream.TransferListener;
import org.schabi.newpipe.player.playback.CustomHlsPlaylistTracker;
public class PlayerDataSource { public class PlayerDataSource {
public static final int LIVE_STREAM_EDGE_GAP_MILLIS = 10000;
private static final double PLAYLIST_STUCK_TARGET_DURATION_COEFFICIENT = 15;
private static final int MANIFEST_MINIMUM_RETRY = 5; private static final int MANIFEST_MINIMUM_RETRY = 5;
private static final int EXTRACTOR_MINIMUM_RETRY = Integer.MAX_VALUE; private static final int EXTRACTOR_MINIMUM_RETRY = Integer.MAX_VALUE;
public static final int LIVE_STREAM_EDGE_GAP_MILLIS = 10000;
private final DataSource.Factory cacheDataSourceFactory; private final DataSource.Factory cacheDataSourceFactory;
private final DataSource.Factory cachelessDataSourceFactory; private final DataSource.Factory cachelessDataSourceFactory;
@ -48,7 +50,11 @@ public class PlayerDataSource {
.setAllowChunklessPreparation(true) .setAllowChunklessPreparation(true)
.setLoadErrorHandlingPolicy(new DefaultLoadErrorHandlingPolicy( .setLoadErrorHandlingPolicy(new DefaultLoadErrorHandlingPolicy(
MANIFEST_MINIMUM_RETRY)) MANIFEST_MINIMUM_RETRY))
.setPlaylistTrackerFactory(CustomHlsPlaylistTracker.FACTORY); .setPlaylistTrackerFactory((dataSourceFactory, loadErrorHandlingPolicy,
playlistParserFactory) ->
new DefaultHlsPlaylistTracker(dataSourceFactory, loadErrorHandlingPolicy,
playlistParserFactory, PLAYLIST_STUCK_TARGET_DURATION_COEFFICIENT)
);
} }
public DashMediaSource.Factory getLiveDashMediaSourceFactory() { public DashMediaSource.Factory getLiveDashMediaSourceFactory() {

View File

@ -1,784 +0,0 @@
/*
* Original source code (DefaultHlsPlaylistTracker): Copyright (C) 2016 The Android Open Source
* Project
*
* Original source code licensed under the Apache License, Version 2.0 (the "License");
* you may not use the original source code of this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.schabi.newpipe.player.playback;
import static com.google.android.exoplayer2.util.Assertions.checkNotNull;
import static com.google.android.exoplayer2.util.Util.castNonNull;
import static java.lang.Math.max;
import android.net.Uri;
import android.os.Handler;
import android.os.SystemClock;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import com.google.android.exoplayer2.C;
import com.google.android.exoplayer2.ParserException;
import com.google.android.exoplayer2.source.LoadEventInfo;
import com.google.android.exoplayer2.source.MediaLoadData;
import com.google.android.exoplayer2.source.MediaSourceEventListener.EventDispatcher;
import com.google.android.exoplayer2.source.hls.HlsDataSourceFactory;
import com.google.android.exoplayer2.source.hls.playlist.DefaultHlsPlaylistTracker;
import com.google.android.exoplayer2.source.hls.playlist.HlsMasterPlaylist;
import com.google.android.exoplayer2.source.hls.playlist.HlsMasterPlaylist.Variant;
import com.google.android.exoplayer2.source.hls.playlist.HlsMediaPlaylist;
import com.google.android.exoplayer2.source.hls.playlist.HlsMediaPlaylist.Part;
import com.google.android.exoplayer2.source.hls.playlist.HlsMediaPlaylist.RenditionReport;
import com.google.android.exoplayer2.source.hls.playlist.HlsMediaPlaylist.Segment;
import com.google.android.exoplayer2.source.hls.playlist.HlsPlaylist;
import com.google.android.exoplayer2.source.hls.playlist.HlsPlaylistParser;
import com.google.android.exoplayer2.source.hls.playlist.HlsPlaylistParserFactory;
import com.google.android.exoplayer2.source.hls.playlist.HlsPlaylistTracker;
import com.google.android.exoplayer2.upstream.DataSource;
import com.google.android.exoplayer2.upstream.HttpDataSource;
import com.google.android.exoplayer2.upstream.LoadErrorHandlingPolicy;
import com.google.android.exoplayer2.upstream.LoadErrorHandlingPolicy.LoadErrorInfo;
import com.google.android.exoplayer2.upstream.Loader;
import com.google.android.exoplayer2.upstream.Loader.LoadErrorAction;
import com.google.android.exoplayer2.upstream.ParsingLoadable;
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;
/**
* NewPipe's implementation for {@link HlsPlaylistTracker}, based on
* {@link DefaultHlsPlaylistTracker}.
*
* <p>
* It redefines the way of how
* {@link PlaylistStuckException PlaylistStuckExceptions} are thrown: instead of
* using a multiplication between the target duration of segments and
* {@link DefaultHlsPlaylistTracker#DEFAULT_PLAYLIST_STUCK_TARGET_DURATION_COEFFICIENT}, it uses a
* constant value (see {@link #MAXIMUM_PLAYLIST_STUCK_DURATION_MS}), in order to reduce the number
* of this exception thrown, especially on (very) low-latency livestreams.
* </p>
*/
public final class CustomHlsPlaylistTracker implements HlsPlaylistTracker,
Loader.Callback<ParsingLoadable<HlsPlaylist>> {
/**
* Factory for {@link CustomHlsPlaylistTracker} instances.
*/
public static final Factory FACTORY = CustomHlsPlaylistTracker::new;
/**
* The maximum duration before a {@link PlaylistStuckException} is thrown, in milliseconds.
*/
private static final double MAXIMUM_PLAYLIST_STUCK_DURATION_MS = 15000;
private final HlsDataSourceFactory dataSourceFactory;
private final HlsPlaylistParserFactory playlistParserFactory;
private final LoadErrorHandlingPolicy loadErrorHandlingPolicy;
private final HashMap<Uri, MediaPlaylistBundle> playlistBundles;
private final List<PlaylistEventListener> listeners;
@Nullable
private EventDispatcher eventDispatcher;
@Nullable
private Loader initialPlaylistLoader;
@Nullable
private Handler playlistRefreshHandler;
@Nullable
private PrimaryPlaylistListener primaryPlaylistListener;
@Nullable
private HlsMasterPlaylist masterPlaylist;
@Nullable
private Uri primaryMediaPlaylistUrl;
@Nullable
private HlsMediaPlaylist primaryMediaPlaylistSnapshot;
private boolean isLive;
private long initialStartTimeUs;
/**
* Creates an instance.
*
* @param dataSourceFactory A factory for {@link DataSource} instances.
* @param loadErrorHandlingPolicy The {@link LoadErrorHandlingPolicy}.
* @param playlistParserFactory An {@link HlsPlaylistParserFactory}.
*/
public CustomHlsPlaylistTracker(final HlsDataSourceFactory dataSourceFactory,
final LoadErrorHandlingPolicy loadErrorHandlingPolicy,
final HlsPlaylistParserFactory playlistParserFactory) {
this.dataSourceFactory = dataSourceFactory;
this.playlistParserFactory = playlistParserFactory;
this.loadErrorHandlingPolicy = loadErrorHandlingPolicy;
listeners = new ArrayList<>();
playlistBundles = new HashMap<>();
initialStartTimeUs = C.TIME_UNSET;
}
// HlsPlaylistTracker implementation.
@Override
public void start(@NonNull final Uri initialPlaylistUri,
@NonNull final EventDispatcher eventDispatcherObject,
@NonNull final PrimaryPlaylistListener primaryPlaylistListenerObject) {
this.playlistRefreshHandler = Util.createHandlerForCurrentLooper();
this.eventDispatcher = eventDispatcherObject;
this.primaryPlaylistListener = primaryPlaylistListenerObject;
final ParsingLoadable<HlsPlaylist> masterPlaylistLoadable = new ParsingLoadable<>(
dataSourceFactory.createDataSource(C.DATA_TYPE_MANIFEST),
initialPlaylistUri,
C.DATA_TYPE_MANIFEST,
playlistParserFactory.createPlaylistParser());
Assertions.checkState(initialPlaylistLoader == null);
initialPlaylistLoader = new Loader("CustomHlsPlaylistTracker:MasterPlaylist");
final long elapsedRealtime = initialPlaylistLoader.startLoading(masterPlaylistLoadable,
this, loadErrorHandlingPolicy.getMinimumLoadableRetryCount(
masterPlaylistLoadable.type));
eventDispatcherObject.loadStarted(new LoadEventInfo(masterPlaylistLoadable.loadTaskId,
masterPlaylistLoadable.dataSpec, elapsedRealtime),
masterPlaylistLoadable.type);
}
@Override
public void stop() {
primaryMediaPlaylistUrl = null;
primaryMediaPlaylistSnapshot = null;
masterPlaylist = null;
initialStartTimeUs = C.TIME_UNSET;
initialPlaylistLoader.release();
initialPlaylistLoader = null;
for (final MediaPlaylistBundle bundle : playlistBundles.values()) {
bundle.release();
}
playlistRefreshHandler.removeCallbacksAndMessages(null);
playlistRefreshHandler = null;
playlistBundles.clear();
}
@Override
public void addListener(@NonNull final PlaylistEventListener listener) {
checkNotNull(listener);
listeners.add(listener);
}
@Override
public void removeListener(@NonNull final PlaylistEventListener listener) {
listeners.remove(listener);
}
@Override
@Nullable
public HlsMasterPlaylist getMasterPlaylist() {
return masterPlaylist;
}
@Override
@Nullable
public HlsMediaPlaylist getPlaylistSnapshot(@NonNull final Uri url,
final boolean isForPlayback) {
final HlsMediaPlaylist snapshot = playlistBundles.get(url).getPlaylistSnapshot();
if (snapshot != null && isForPlayback) {
maybeSetPrimaryUrl(url);
}
return snapshot;
}
@Override
public long getInitialStartTimeUs() {
return initialStartTimeUs;
}
@Override
public boolean isSnapshotValid(@NonNull final Uri url) {
return playlistBundles.get(url).isSnapshotValid();
}
@Override
public void maybeThrowPrimaryPlaylistRefreshError() throws IOException {
if (initialPlaylistLoader != null) {
initialPlaylistLoader.maybeThrowError();
}
if (primaryMediaPlaylistUrl != null) {
maybeThrowPlaylistRefreshError(primaryMediaPlaylistUrl);
}
}
@Override
public void maybeThrowPlaylistRefreshError(@NonNull final Uri url) throws IOException {
playlistBundles.get(url).maybeThrowPlaylistRefreshError();
}
@Override
public void refreshPlaylist(@NonNull final Uri url) {
playlistBundles.get(url).loadPlaylist();
}
@Override
public boolean isLive() {
return isLive;
}
// Loader.Callback implementation.
@Override
public void onLoadCompleted(@NonNull final ParsingLoadable<HlsPlaylist> loadable,
final long elapsedRealtimeMs,
final long loadDurationMs) {
final HlsPlaylist result = loadable.getResult();
final HlsMasterPlaylist newMasterPlaylist;
final boolean isMediaPlaylist = result instanceof HlsMediaPlaylist;
if (isMediaPlaylist) {
newMasterPlaylist = HlsMasterPlaylist.createSingleVariantMasterPlaylist(
result.baseUri);
} else { // result instanceof HlsMasterPlaylist
newMasterPlaylist = (HlsMasterPlaylist) result;
}
this.masterPlaylist = newMasterPlaylist;
primaryMediaPlaylistUrl = newMasterPlaylist.variants.get(0).url;
createBundles(newMasterPlaylist.mediaPlaylistUrls);
final LoadEventInfo loadEventInfo = new LoadEventInfo(loadable.loadTaskId,
loadable.dataSpec, loadable.getUri(), loadable.getResponseHeaders(),
elapsedRealtimeMs, loadDurationMs, loadable.bytesLoaded());
final MediaPlaylistBundle primaryBundle = playlistBundles.get(primaryMediaPlaylistUrl);
if (isMediaPlaylist) {
// We don't need to load the playlist again. We can use the same result.
primaryBundle.processLoadedPlaylist((HlsMediaPlaylist) result, loadEventInfo);
} else {
primaryBundle.loadPlaylist();
}
loadErrorHandlingPolicy.onLoadTaskConcluded(loadable.loadTaskId);
eventDispatcher.loadCompleted(loadEventInfo, C.DATA_TYPE_MANIFEST);
}
@Override
public void onLoadCanceled(@NonNull final ParsingLoadable<HlsPlaylist> loadable,
final long elapsedRealtimeMs,
final long loadDurationMs,
final boolean released) {
final LoadEventInfo loadEventInfo = new LoadEventInfo(loadable.loadTaskId,
loadable.dataSpec, loadable.getUri(), loadable.getResponseHeaders(),
elapsedRealtimeMs, loadDurationMs, loadable.bytesLoaded());
loadErrorHandlingPolicy.onLoadTaskConcluded(loadable.loadTaskId);
eventDispatcher.loadCanceled(loadEventInfo, C.DATA_TYPE_MANIFEST);
}
@Override
public LoadErrorAction onLoadError(@NonNull final ParsingLoadable<HlsPlaylist> loadable,
final long elapsedRealtimeMs,
final long loadDurationMs,
final IOException error,
final int errorCount) {
final LoadEventInfo loadEventInfo = new LoadEventInfo(loadable.loadTaskId,
loadable.dataSpec, loadable.getUri(), loadable.getResponseHeaders(),
elapsedRealtimeMs, loadDurationMs, loadable.bytesLoaded());
final MediaLoadData mediaLoadData = new MediaLoadData(loadable.type);
final long retryDelayMs = loadErrorHandlingPolicy.getRetryDelayMsFor(new LoadErrorInfo(
loadEventInfo, mediaLoadData, error, errorCount));
final boolean isFatal = retryDelayMs == C.TIME_UNSET;
eventDispatcher.loadError(loadEventInfo, loadable.type, error, isFatal);
if (isFatal) {
loadErrorHandlingPolicy.onLoadTaskConcluded(loadable.loadTaskId);
}
return isFatal ? Loader.DONT_RETRY_FATAL : Loader.createRetryAction(false, retryDelayMs);
}
// Internal methods.
private boolean maybeSelectNewPrimaryUrl() {
final List<Variant> variants = masterPlaylist.variants;
final int variantsSize = variants.size();
final long currentTimeMs = SystemClock.elapsedRealtime();
for (int i = 0; i < variantsSize; i++) {
final MediaPlaylistBundle bundle = checkNotNull(playlistBundles.get(
variants.get(i).url));
if (currentTimeMs > bundle.excludeUntilMs) {
primaryMediaPlaylistUrl = bundle.playlistUrl;
bundle.loadPlaylistInternal(getRequestUriForPrimaryChange(
primaryMediaPlaylistUrl));
return true;
}
}
return false;
}
private void maybeSetPrimaryUrl(@NonNull final Uri url) {
if (url.equals(primaryMediaPlaylistUrl) || !isVariantUrl(url)
|| (primaryMediaPlaylistSnapshot != null
&& primaryMediaPlaylistSnapshot.hasEndTag)) {
// Ignore if the primary media playlist URL is unchanged, if the media playlist is not
// referenced directly by a variant, or it the last primary snapshot contains an end
// tag.
return;
}
primaryMediaPlaylistUrl = url;
final MediaPlaylistBundle newPrimaryBundle = playlistBundles.get(primaryMediaPlaylistUrl);
final HlsMediaPlaylist newPrimarySnapshot = newPrimaryBundle.playlistSnapshot;
if (newPrimarySnapshot != null && newPrimarySnapshot.hasEndTag) {
primaryMediaPlaylistSnapshot = newPrimarySnapshot;
primaryPlaylistListener.onPrimaryPlaylistRefreshed(newPrimarySnapshot);
} else {
// The snapshot for the new primary media playlist URL may be stale. Defer updating the
// primary snapshot until after we've refreshed it.
newPrimaryBundle.loadPlaylistInternal(getRequestUriForPrimaryChange(url));
}
}
private Uri getRequestUriForPrimaryChange(@NonNull final Uri newPrimaryPlaylistUri) {
if (primaryMediaPlaylistSnapshot != null
&& primaryMediaPlaylistSnapshot.serverControl.canBlockReload) {
final RenditionReport renditionReport = primaryMediaPlaylistSnapshot.renditionReports
.get(newPrimaryPlaylistUri);
if (renditionReport != null) {
final Uri.Builder uriBuilder = newPrimaryPlaylistUri.buildUpon();
uriBuilder.appendQueryParameter(MediaPlaylistBundle.BLOCK_MSN_PARAM,
String.valueOf(renditionReport.lastMediaSequence));
if (renditionReport.lastPartIndex != C.INDEX_UNSET) {
uriBuilder.appendQueryParameter(MediaPlaylistBundle.BLOCK_PART_PARAM,
String.valueOf(renditionReport.lastPartIndex));
}
return uriBuilder.build();
}
}
return newPrimaryPlaylistUri;
}
/**
* @return whether any of the variants in the master playlist have the specified playlist URL.
* @param playlistUrl the playlist URL to test
*/
private boolean isVariantUrl(final Uri playlistUrl) {
final List<Variant> variants = masterPlaylist.variants;
final int variantsSize = variants.size();
for (int i = 0; i < variantsSize; i++) {
if (playlistUrl.equals(variants.get(i).url)) {
return true;
}
}
return false;
}
private void createBundles(@NonNull final List<Uri> urls) {
final int listSize = urls.size();
for (int i = 0; i < listSize; i++) {
final Uri url = urls.get(i);
final MediaPlaylistBundle bundle = new MediaPlaylistBundle(url);
playlistBundles.put(url, bundle);
}
}
/**
* Called by the bundles when a snapshot changes.
*
* @param url The url of the playlist.
* @param newSnapshot The new snapshot.
*/
private void onPlaylistUpdated(@NonNull final Uri url, final HlsMediaPlaylist newSnapshot) {
if (url.equals(primaryMediaPlaylistUrl)) {
if (primaryMediaPlaylistSnapshot == null) {
// This is the first primary URL snapshot.
isLive = !newSnapshot.hasEndTag;
initialStartTimeUs = newSnapshot.startTimeUs;
}
primaryMediaPlaylistSnapshot = newSnapshot;
primaryPlaylistListener.onPrimaryPlaylistRefreshed(newSnapshot);
}
final int listenersSize = listeners.size();
for (int i = 0; i < listenersSize; i++) {
listeners.get(i).onPlaylistChanged();
}
}
private boolean notifyPlaylistError(final Uri playlistUrl, final long exclusionDurationMs) {
final int listenersSize = listeners.size();
boolean anyExclusionFailed = false;
for (int i = 0; i < listenersSize; i++) {
anyExclusionFailed |= !listeners.get(i).onPlaylistError(playlistUrl,
exclusionDurationMs);
}
return anyExclusionFailed;
}
@SuppressWarnings("squid:S2259")
private HlsMediaPlaylist getLatestPlaylistSnapshot(
@Nullable final HlsMediaPlaylist oldPlaylist,
@NonNull final HlsMediaPlaylist loadedPlaylist) {
if (!loadedPlaylist.isNewerThan(oldPlaylist)) {
if (loadedPlaylist.hasEndTag) {
// If the loaded playlist has an end tag but is not newer than the old playlist
// then we have an inconsistent state. This is typically caused by the server
// incorrectly resetting the media sequence when appending the end tag. We resolve
// this case as best we can by returning the old playlist with the end tag
// appended.
return oldPlaylist.copyWithEndTag();
} else {
return oldPlaylist;
}
}
final long startTimeUs = getLoadedPlaylistStartTimeUs(oldPlaylist, loadedPlaylist);
final int discontinuitySequence = getLoadedPlaylistDiscontinuitySequence(oldPlaylist,
loadedPlaylist);
return loadedPlaylist.copyWith(startTimeUs, discontinuitySequence);
}
private long getLoadedPlaylistStartTimeUs(@Nullable final HlsMediaPlaylist oldPlaylist,
@NonNull final HlsMediaPlaylist loadedPlaylist) {
if (loadedPlaylist.hasProgramDateTime) {
return loadedPlaylist.startTimeUs;
}
final long primarySnapshotStartTimeUs = primaryMediaPlaylistSnapshot != null
? primaryMediaPlaylistSnapshot.startTimeUs : 0;
if (oldPlaylist == null) {
return primarySnapshotStartTimeUs;
}
final Segment firstOldOverlappingSegment = getFirstOldOverlappingSegment(oldPlaylist,
loadedPlaylist);
if (firstOldOverlappingSegment != null) {
return oldPlaylist.startTimeUs + firstOldOverlappingSegment.relativeStartTimeUs;
} else if (oldPlaylist.segments.size() == loadedPlaylist.mediaSequence
- oldPlaylist.mediaSequence) {
return oldPlaylist.getEndTimeUs();
} else {
// No segments overlap, we assume the new playlist start coincides with the primary
// playlist.
return primarySnapshotStartTimeUs;
}
}
private int getLoadedPlaylistDiscontinuitySequence(
@Nullable final HlsMediaPlaylist oldPlaylist,
@NonNull final HlsMediaPlaylist loadedPlaylist) {
if (loadedPlaylist.hasDiscontinuitySequence) {
return loadedPlaylist.discontinuitySequence;
}
// TODO: Improve cross-playlist discontinuity adjustment.
final int primaryUrlDiscontinuitySequence = primaryMediaPlaylistSnapshot != null
? primaryMediaPlaylistSnapshot.discontinuitySequence : 0;
if (oldPlaylist == null) {
return primaryUrlDiscontinuitySequence;
}
final Segment firstOldOverlappingSegment = getFirstOldOverlappingSegment(oldPlaylist,
loadedPlaylist);
if (firstOldOverlappingSegment != null) {
return oldPlaylist.discontinuitySequence
+ firstOldOverlappingSegment.relativeDiscontinuitySequence
- loadedPlaylist.segments.get(0).relativeDiscontinuitySequence;
}
return primaryUrlDiscontinuitySequence;
}
@Nullable
private static Segment getFirstOldOverlappingSegment(
@NonNull final HlsMediaPlaylist oldPlaylist,
@NonNull final HlsMediaPlaylist loadedPlaylist) {
final int mediaSequenceOffset = (int) (loadedPlaylist.mediaSequence
- oldPlaylist.mediaSequence);
final List<Segment> oldSegments = oldPlaylist.segments;
return mediaSequenceOffset < oldSegments.size() ? oldSegments.get(mediaSequenceOffset)
: null;
}
/**
* Hold all information related to a specific Media Playlist.
*/
private final class MediaPlaylistBundle
implements Loader.Callback<ParsingLoadable<HlsPlaylist>> {
private static final String BLOCK_MSN_PARAM = "_HLS_msn";
private static final String BLOCK_PART_PARAM = "_HLS_part";
private static final String SKIP_PARAM = "_HLS_skip";
private final Uri playlistUrl;
private final Loader mediaPlaylistLoader;
private final DataSource mediaPlaylistDataSource;
@Nullable
private HlsMediaPlaylist playlistSnapshot;
private long lastSnapshotLoadMs;
private long lastSnapshotChangeMs;
private long earliestNextLoadTimeMs;
private long excludeUntilMs;
private boolean loadPending;
@Nullable
private IOException playlistError;
MediaPlaylistBundle(final Uri playlistUrl) {
this.playlistUrl = playlistUrl;
mediaPlaylistLoader = new Loader("CustomHlsPlaylistTracker:MediaPlaylist");
mediaPlaylistDataSource = dataSourceFactory.createDataSource(C.DATA_TYPE_MANIFEST);
}
@Nullable
public HlsMediaPlaylist getPlaylistSnapshot() {
return playlistSnapshot;
}
public boolean isSnapshotValid() {
if (playlistSnapshot == null) {
return false;
}
final long currentTimeMs = SystemClock.elapsedRealtime();
final long snapshotValidityDurationMs = max(30000, C.usToMs(
playlistSnapshot.durationUs));
return playlistSnapshot.hasEndTag
|| playlistSnapshot.playlistType == HlsMediaPlaylist.PLAYLIST_TYPE_EVENT
|| playlistSnapshot.playlistType == HlsMediaPlaylist.PLAYLIST_TYPE_VOD
|| lastSnapshotLoadMs + snapshotValidityDurationMs > currentTimeMs;
}
public void loadPlaylist() {
loadPlaylistInternal(playlistUrl);
}
public void maybeThrowPlaylistRefreshError() throws IOException {
mediaPlaylistLoader.maybeThrowError();
if (playlistError != null) {
throw playlistError;
}
}
public void release() {
mediaPlaylistLoader.release();
}
// Loader.Callback implementation.
@Override
public void onLoadCompleted(@NonNull final ParsingLoadable<HlsPlaylist> loadable,
final long elapsedRealtimeMs,
final long loadDurationMs) {
final HlsPlaylist result = loadable.getResult();
final LoadEventInfo loadEventInfo = new LoadEventInfo(loadable.loadTaskId,
loadable.dataSpec, loadable.getUri(), loadable.getResponseHeaders(),
elapsedRealtimeMs, loadDurationMs, loadable.bytesLoaded());
if (result instanceof HlsMediaPlaylist) {
processLoadedPlaylist((HlsMediaPlaylist) result, loadEventInfo);
eventDispatcher.loadCompleted(loadEventInfo, C.DATA_TYPE_MANIFEST);
} else {
playlistError = new ParserException("Loaded playlist has unexpected type.");
eventDispatcher.loadError(
loadEventInfo, C.DATA_TYPE_MANIFEST, playlistError, true);
}
loadErrorHandlingPolicy.onLoadTaskConcluded(loadable.loadTaskId);
}
@Override
public void onLoadCanceled(@NonNull final ParsingLoadable<HlsPlaylist> loadable,
final long elapsedRealtimeMs,
final long loadDurationMs,
final boolean released) {
final LoadEventInfo loadEventInfo = new LoadEventInfo(loadable.loadTaskId,
loadable.dataSpec, loadable.getUri(), loadable.getResponseHeaders(),
elapsedRealtimeMs, loadDurationMs, loadable.bytesLoaded());
loadErrorHandlingPolicy.onLoadTaskConcluded(loadable.loadTaskId);
eventDispatcher.loadCanceled(loadEventInfo, C.DATA_TYPE_MANIFEST);
}
@Override
public LoadErrorAction onLoadError(@NonNull final ParsingLoadable<HlsPlaylist> loadable,
final long elapsedRealtimeMs,
final long loadDurationMs,
final IOException error,
final int errorCount) {
final LoadEventInfo loadEventInfo = new LoadEventInfo(loadable.loadTaskId,
loadable.dataSpec, loadable.getUri(), loadable.getResponseHeaders(),
elapsedRealtimeMs, loadDurationMs, loadable.bytesLoaded());
final boolean isBlockingRequest = loadable.getUri().getQueryParameter(BLOCK_MSN_PARAM)
!= null;
final boolean deltaUpdateFailed = error instanceof HlsPlaylistParser
.DeltaUpdateException;
if (isBlockingRequest || deltaUpdateFailed) {
int responseCode = Integer.MAX_VALUE;
if (error instanceof HttpDataSource.InvalidResponseCodeException) {
responseCode = ((HttpDataSource.InvalidResponseCodeException) error)
.responseCode;
}
if (deltaUpdateFailed || responseCode == 400 || responseCode == 503) {
// Intercept failed delta updates and blocking requests producing a Bad Request
// (400) and Service Unavailable (503). In such cases, force a full,
// non-blocking request (see RFC 8216, section 6.2.5.2 and 6.3.7).
earliestNextLoadTimeMs = SystemClock.elapsedRealtime();
loadPlaylist();
castNonNull(eventDispatcher).loadError(loadEventInfo, loadable.type, error,
true);
return Loader.DONT_RETRY;
}
}
final MediaLoadData mediaLoadData = new MediaLoadData(loadable.type);
final LoadErrorInfo loadErrorInfo = new LoadErrorInfo(loadEventInfo, mediaLoadData,
error, errorCount);
final LoadErrorAction loadErrorAction;
final long exclusionDurationMs = loadErrorHandlingPolicy.getBlacklistDurationMsFor(
loadErrorInfo);
final boolean shouldExclude = exclusionDurationMs != C.TIME_UNSET;
boolean exclusionFailed = notifyPlaylistError(playlistUrl, exclusionDurationMs)
|| !shouldExclude;
if (shouldExclude) {
exclusionFailed |= excludePlaylist(exclusionDurationMs);
}
if (exclusionFailed) {
final long retryDelay = loadErrorHandlingPolicy.getRetryDelayMsFor(loadErrorInfo);
loadErrorAction = retryDelay != C.TIME_UNSET
? Loader.createRetryAction(false, retryDelay)
: Loader.DONT_RETRY_FATAL;
} else {
loadErrorAction = Loader.DONT_RETRY;
}
final boolean wasCanceled = !loadErrorAction.isRetry();
eventDispatcher.loadError(loadEventInfo, loadable.type, error, wasCanceled);
if (wasCanceled) {
loadErrorHandlingPolicy.onLoadTaskConcluded(loadable.loadTaskId);
}
return loadErrorAction;
}
// Internal methods.
private void loadPlaylistInternal(@NonNull final Uri playlistRequestUri) {
excludeUntilMs = 0;
if (loadPending || mediaPlaylistLoader.isLoading()
|| mediaPlaylistLoader.hasFatalError()) {
// Load already pending, in progress, or a fatal error has been encountered. Do
// nothing.
return;
}
final long currentTimeMs = SystemClock.elapsedRealtime();
if (currentTimeMs < earliestNextLoadTimeMs) {
loadPending = true;
playlistRefreshHandler.postDelayed(
() -> {
loadPending = false;
loadPlaylistImmediately(playlistRequestUri);
},
earliestNextLoadTimeMs - currentTimeMs);
} else {
loadPlaylistImmediately(playlistRequestUri);
}
}
private void loadPlaylistImmediately(@NonNull final Uri playlistRequestUri) {
final ParsingLoadable.Parser<HlsPlaylist> mediaPlaylistParser = playlistParserFactory
.createPlaylistParser(masterPlaylist, playlistSnapshot);
final ParsingLoadable<HlsPlaylist> mediaPlaylistLoadable = new ParsingLoadable<>(
mediaPlaylistDataSource, playlistRequestUri, C.DATA_TYPE_MANIFEST,
mediaPlaylistParser);
final long elapsedRealtime = mediaPlaylistLoader.startLoading(mediaPlaylistLoadable,
this, loadErrorHandlingPolicy.getMinimumLoadableRetryCount(
mediaPlaylistLoadable.type));
eventDispatcher.loadStarted(new LoadEventInfo(mediaPlaylistLoadable.loadTaskId,
mediaPlaylistLoadable.dataSpec, elapsedRealtime),
mediaPlaylistLoadable.type);
}
@SuppressWarnings("squid:S2259")
private void processLoadedPlaylist(final HlsMediaPlaylist loadedPlaylist,
final LoadEventInfo loadEventInfo) {
final HlsMediaPlaylist oldPlaylist = playlistSnapshot;
final long currentTimeMs = SystemClock.elapsedRealtime();
lastSnapshotLoadMs = currentTimeMs;
playlistSnapshot = getLatestPlaylistSnapshot(oldPlaylist, loadedPlaylist);
if (playlistSnapshot != oldPlaylist) {
playlistError = null;
lastSnapshotChangeMs = currentTimeMs;
onPlaylistUpdated(playlistUrl, playlistSnapshot);
} else if (!playlistSnapshot.hasEndTag) {
if (loadedPlaylist.mediaSequence + loadedPlaylist.segments.size()
< playlistSnapshot.mediaSequence) {
// TODO: Allow customization of playlist resets handling.
// The media sequence jumped backwards. The server has probably reset. We do
// not try excluding in this case.
playlistError = new PlaylistResetException(playlistUrl);
notifyPlaylistError(playlistUrl, C.TIME_UNSET);
} else if (currentTimeMs - lastSnapshotChangeMs
> MAXIMUM_PLAYLIST_STUCK_DURATION_MS) {
// TODO: Allow customization of stuck playlists handling.
playlistError = new PlaylistStuckException(playlistUrl);
final LoadErrorInfo loadErrorInfo = new LoadErrorInfo(loadEventInfo,
new MediaLoadData(C.DATA_TYPE_MANIFEST),
playlistError, 1);
final long exclusionDurationMs = loadErrorHandlingPolicy
.getBlacklistDurationMsFor(loadErrorInfo);
notifyPlaylistError(playlistUrl, exclusionDurationMs);
if (exclusionDurationMs != C.TIME_UNSET) {
excludePlaylist(exclusionDurationMs);
}
}
}
long durationUntilNextLoadUs = 0L;
if (!playlistSnapshot.serverControl.canBlockReload) {
// If blocking requests are not supported, do not allow the playlist to load again
// within the target duration if we obtained a new snapshot, or half the target
// duration otherwise.
durationUntilNextLoadUs = playlistSnapshot != oldPlaylist
? playlistSnapshot.targetDurationUs
: (playlistSnapshot.targetDurationUs / 2);
}
earliestNextLoadTimeMs = currentTimeMs + C.usToMs(durationUntilNextLoadUs);
// Schedule a load if this is the primary playlist or a playlist of a low-latency
// stream and it doesn't have an end tag. Else the next load will be scheduled when
// refreshPlaylist is called, or when this playlist becomes the primary.
final boolean scheduleLoad = playlistSnapshot.partTargetDurationUs != C.TIME_UNSET
|| playlistUrl.equals(primaryMediaPlaylistUrl);
if (scheduleLoad && !playlistSnapshot.hasEndTag) {
loadPlaylistInternal(getMediaPlaylistUriForReload());
}
}
private Uri getMediaPlaylistUriForReload() {
if (playlistSnapshot == null
|| (playlistSnapshot.serverControl.skipUntilUs == C.TIME_UNSET
&& !playlistSnapshot.serverControl.canBlockReload)) {
return playlistUrl;
}
final Uri.Builder uriBuilder = playlistUrl.buildUpon();
if (playlistSnapshot.serverControl.canBlockReload) {
final long targetMediaSequence = playlistSnapshot.mediaSequence
+ playlistSnapshot.segments.size();
uriBuilder.appendQueryParameter(BLOCK_MSN_PARAM, String.valueOf(
targetMediaSequence));
if (playlistSnapshot.partTargetDurationUs != C.TIME_UNSET) {
final List<Part> trailingParts = playlistSnapshot.trailingParts;
int targetPartIndex = trailingParts.size();
if (!trailingParts.isEmpty() && Iterables.getLast(trailingParts).isPreload) {
// Ignore the preload part.
targetPartIndex--;
}
uriBuilder.appendQueryParameter(BLOCK_PART_PARAM, String.valueOf(
targetPartIndex));
}
}
if (playlistSnapshot.serverControl.skipUntilUs != C.TIME_UNSET) {
uriBuilder.appendQueryParameter(SKIP_PARAM,
playlistSnapshot.serverControl.canSkipDateRanges ? "v2" : "YES");
}
return uriBuilder.build();
}
/**
* Exclude the playlist.
*
* @param exclusionDurationMs The number of milliseconds for which the playlist should be
* excluded.
* @return Whether the playlist is the primary, despite being excluded.
*/
private boolean excludePlaylist(final long exclusionDurationMs) {
excludeUntilMs = SystemClock.elapsedRealtime() + exclusionDurationMs;
return playlistUrl.equals(primaryMediaPlaylistUrl) && !maybeSelectNewPrimaryUrl();
}
}
}