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/*
* Copyright (C) 2016 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use 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.telegram.messenger.exoplayer2;
import android.os.Handler;
import android.os.HandlerThread;
import android.os.Message;
import android.os.Process;
import android.os.SystemClock;
import android.util.Log;
import android.util.Pair;
import org.telegram.messenger.exoplayer2.ExoPlayer.ExoPlayerMessage;
import org.telegram.messenger.exoplayer2.source.MediaPeriod;
import org.telegram.messenger.exoplayer2.source.MediaSource;
import org.telegram.messenger.exoplayer2.source.SampleStream;
import org.telegram.messenger.exoplayer2.trackselection.TrackSelection;
import org.telegram.messenger.exoplayer2.trackselection.TrackSelectionArray;
import org.telegram.messenger.exoplayer2.trackselection.TrackSelector;
import org.telegram.messenger.exoplayer2.trackselection.TrackSelectorResult;
import org.telegram.messenger.exoplayer2.util.Assertions;
import org.telegram.messenger.exoplayer2.util.MediaClock;
import org.telegram.messenger.exoplayer2.util.StandaloneMediaClock;
import org.telegram.messenger.exoplayer2.util.TraceUtil;
import java.io.IOException;
/**
* Implements the internal behavior of {@link ExoPlayerImpl}.
*/
/* package */ final class ExoPlayerImplInternal implements Handler.Callback,
MediaPeriod.Callback, TrackSelector.InvalidationListener, MediaSource.Listener {
/**
* Playback position information which is read on the application's thread by
* {@link ExoPlayerImpl} and read/written internally on the player's thread.
*/
public static final class PlaybackInfo {
public final int periodIndex;
public final long startPositionUs;
public volatile long positionUs;
public volatile long bufferedPositionUs;
public PlaybackInfo(int periodIndex, long startPositionUs) {
this.periodIndex = periodIndex;
this.startPositionUs = startPositionUs;
positionUs = startPositionUs;
bufferedPositionUs = startPositionUs;
}
public PlaybackInfo copyWithPeriodIndex(int periodIndex) {
PlaybackInfo playbackInfo = new PlaybackInfo(periodIndex, startPositionUs);
playbackInfo.positionUs = positionUs;
playbackInfo.bufferedPositionUs = bufferedPositionUs;
return playbackInfo;
}
}
public static final class SourceInfo {
public final Timeline timeline;
public final Object manifest;
public final PlaybackInfo playbackInfo;
public final int seekAcks;
public SourceInfo(Timeline timeline, Object manifest, PlaybackInfo playbackInfo, int seekAcks) {
this.timeline = timeline;
this.manifest = manifest;
this.playbackInfo = playbackInfo;
this.seekAcks = seekAcks;
}
}
private static final String TAG = "ExoPlayerImplInternal";
// External messages
public static final int MSG_PREPARE_ACK = 0;
public static final int MSG_STATE_CHANGED = 1;
public static final int MSG_LOADING_CHANGED = 2;
public static final int MSG_TRACKS_CHANGED = 3;
public static final int MSG_SEEK_ACK = 4;
public static final int MSG_POSITION_DISCONTINUITY = 5;
public static final int MSG_SOURCE_INFO_REFRESHED = 6;
public static final int MSG_PLAYBACK_PARAMETERS_CHANGED = 7;
public static final int MSG_ERROR = 8;
// Internal messages
private static final int MSG_PREPARE = 0;
private static final int MSG_SET_PLAY_WHEN_READY = 1;
private static final int MSG_DO_SOME_WORK = 2;
private static final int MSG_SEEK_TO = 3;
private static final int MSG_SET_PLAYBACK_PARAMETERS = 4;
private static final int MSG_STOP = 5;
private static final int MSG_RELEASE = 6;
private static final int MSG_REFRESH_SOURCE_INFO = 7;
private static final int MSG_PERIOD_PREPARED = 8;
private static final int MSG_SOURCE_CONTINUE_LOADING_REQUESTED = 9;
private static final int MSG_TRACK_SELECTION_INVALIDATED = 10;
private static final int MSG_CUSTOM = 11;
private static final int PREPARING_SOURCE_INTERVAL_MS = 10;
private static final int RENDERING_INTERVAL_MS = 10;
private static final int IDLE_INTERVAL_MS = 1000;
/**
* Limits the maximum number of periods to buffer ahead of the current playing period. The
* buffering policy normally prevents buffering too far ahead, but the policy could allow too many
* small periods to be buffered if the period count were not limited.
*/
private static final int MAXIMUM_BUFFER_AHEAD_PERIODS = 100;
/**
* Offset added to all sample timestamps read by renderers to make them non-negative. This is
* provided for convenience of sources that may return negative timestamps due to prerolling
* samples from a keyframe before their first sample with timestamp zero, so it must be set to a
* value greater than or equal to the maximum key-frame interval in seekable periods.
*/
private static final int RENDERER_TIMESTAMP_OFFSET_US = 60000000;
private final Renderer[] renderers;
private final RendererCapabilities[] rendererCapabilities;
private final TrackSelector trackSelector;
private final LoadControl loadControl;
private final StandaloneMediaClock standaloneMediaClock;
private final Handler handler;
private final HandlerThread internalPlaybackThread;
private final Handler eventHandler;
private final ExoPlayer player;
private final Timeline.Window window;
private final Timeline.Period period;
private PlaybackInfo playbackInfo;
private PlaybackParameters playbackParameters;
private Renderer rendererMediaClockSource;
private MediaClock rendererMediaClock;
private MediaSource mediaSource;
private Renderer[] enabledRenderers;
private boolean released;
private boolean playWhenReady;
private boolean rebuffering;
private boolean isLoading;
private int state;
private int customMessagesSent;
private int customMessagesProcessed;
private long elapsedRealtimeUs;
private int pendingInitialSeekCount;
private SeekPosition pendingSeekPosition;
private long rendererPositionUs;
private MediaPeriodHolder loadingPeriodHolder;
private MediaPeriodHolder readingPeriodHolder;
private MediaPeriodHolder playingPeriodHolder;
private Timeline timeline;
public ExoPlayerImplInternal(Renderer[] renderers, TrackSelector trackSelector,
LoadControl loadControl, boolean playWhenReady, Handler eventHandler,
PlaybackInfo playbackInfo, ExoPlayer player) {
this.renderers = renderers;
this.trackSelector = trackSelector;
this.loadControl = loadControl;
this.playWhenReady = playWhenReady;
this.eventHandler = eventHandler;
this.state = ExoPlayer.STATE_IDLE;
this.playbackInfo = playbackInfo;
this.player = player;
rendererCapabilities = new RendererCapabilities[renderers.length];
for (int i = 0; i < renderers.length; i++) {
renderers[i].setIndex(i);
rendererCapabilities[i] = renderers[i].getCapabilities();
}
standaloneMediaClock = new StandaloneMediaClock();
enabledRenderers = new Renderer[0];
window = new Timeline.Window();
period = new Timeline.Period();
trackSelector.init(this);
playbackParameters = PlaybackParameters.DEFAULT;
// Note: The documentation for Process.THREAD_PRIORITY_AUDIO that states "Applications can
// not normally change to this priority" is incorrect.
internalPlaybackThread = new HandlerThread("ExoPlayerImplInternal:Handler",
Process.THREAD_PRIORITY_AUDIO);
internalPlaybackThread.start();
handler = new Handler(internalPlaybackThread.getLooper(), this);
}
public void prepare(MediaSource mediaSource, boolean resetPosition) {
handler.obtainMessage(MSG_PREPARE, resetPosition ? 1 : 0, 0, mediaSource)
.sendToTarget();
}
public void setPlayWhenReady(boolean playWhenReady) {
handler.obtainMessage(MSG_SET_PLAY_WHEN_READY, playWhenReady ? 1 : 0, 0).sendToTarget();
}
public void seekTo(Timeline timeline, int windowIndex, long positionUs) {
handler.obtainMessage(MSG_SEEK_TO, new SeekPosition(timeline, windowIndex, positionUs))
.sendToTarget();
}
public void setPlaybackParameters(PlaybackParameters playbackParameters) {
handler.obtainMessage(MSG_SET_PLAYBACK_PARAMETERS, playbackParameters).sendToTarget();
}
public void stop() {
handler.sendEmptyMessage(MSG_STOP);
}
public void sendMessages(ExoPlayerMessage... messages) {
if (released) {
Log.w(TAG, "Ignoring messages sent after release.");
return;
}
customMessagesSent++;
handler.obtainMessage(MSG_CUSTOM, messages).sendToTarget();
}
public synchronized void blockingSendMessages(ExoPlayerMessage... messages) {
if (released) {
Log.w(TAG, "Ignoring messages sent after release.");
return;
}
int messageNumber = customMessagesSent++;
handler.obtainMessage(MSG_CUSTOM, messages).sendToTarget();
while (customMessagesProcessed <= messageNumber) {
try {
wait();
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
}
}
}
public synchronized void release() {
if (released) {
return;
}
handler.sendEmptyMessage(MSG_RELEASE);
while (!released) {
try {
wait();
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
}
}
internalPlaybackThread.quit();
}
// MediaSource.Listener implementation.
@Override
public void onSourceInfoRefreshed(Timeline timeline, Object manifest) {
handler.obtainMessage(MSG_REFRESH_SOURCE_INFO, Pair.create(timeline, manifest)).sendToTarget();
}
// MediaPeriod.Callback implementation.
@Override
public void onPrepared(MediaPeriod source) {
handler.obtainMessage(MSG_PERIOD_PREPARED, source).sendToTarget();
}
@Override
public void onContinueLoadingRequested(MediaPeriod source) {
handler.obtainMessage(MSG_SOURCE_CONTINUE_LOADING_REQUESTED, source).sendToTarget();
}
// TrackSelector.InvalidationListener implementation.
@Override
public void onTrackSelectionsInvalidated() {
handler.sendEmptyMessage(MSG_TRACK_SELECTION_INVALIDATED);
}
// Handler.Callback implementation.
@SuppressWarnings("unchecked")
@Override
public boolean handleMessage(Message msg) {
try {
switch (msg.what) {
case MSG_PREPARE: {
prepareInternal((MediaSource) msg.obj, msg.arg1 != 0);
return true;
}
case MSG_SET_PLAY_WHEN_READY: {
setPlayWhenReadyInternal(msg.arg1 != 0);
return true;
}
case MSG_DO_SOME_WORK: {
doSomeWork();
return true;
}
case MSG_SEEK_TO: {
seekToInternal((SeekPosition) msg.obj);
return true;
}
case MSG_SET_PLAYBACK_PARAMETERS: {
setPlaybackParametersInternal((PlaybackParameters) msg.obj);
return true;
}
case MSG_STOP: {
stopInternal();
return true;
}
case MSG_RELEASE: {
releaseInternal();
return true;
}
case MSG_PERIOD_PREPARED: {
handlePeriodPrepared((MediaPeriod) msg.obj);
return true;
}
case MSG_REFRESH_SOURCE_INFO: {
handleSourceInfoRefreshed((Pair<Timeline, Object>) msg.obj);
return true;
}
case MSG_SOURCE_CONTINUE_LOADING_REQUESTED: {
handleContinueLoadingRequested((MediaPeriod) msg.obj);
return true;
}
case MSG_TRACK_SELECTION_INVALIDATED: {
reselectTracksInternal();
return true;
}
case MSG_CUSTOM: {
sendMessagesInternal((ExoPlayerMessage[]) msg.obj);
return true;
}
default:
return false;
}
} catch (ExoPlaybackException e) {
Log.e(TAG, "Renderer error.", e);
eventHandler.obtainMessage(MSG_ERROR, e).sendToTarget();
stopInternal();
return true;
} catch (IOException e) {
Log.e(TAG, "Source error.", e);
eventHandler.obtainMessage(MSG_ERROR, ExoPlaybackException.createForSource(e)).sendToTarget();
stopInternal();
return true;
} catch (RuntimeException e) {
Log.e(TAG, "Internal runtime error.", e);
eventHandler.obtainMessage(MSG_ERROR, ExoPlaybackException.createForUnexpected(e))
.sendToTarget();
stopInternal();
return true;
}
}
// Private methods.
private void setState(int state) {
if (this.state != state) {
this.state = state;
eventHandler.obtainMessage(MSG_STATE_CHANGED, state, 0).sendToTarget();
}
}
private void setIsLoading(boolean isLoading) {
if (this.isLoading != isLoading) {
this.isLoading = isLoading;
eventHandler.obtainMessage(MSG_LOADING_CHANGED, isLoading ? 1 : 0, 0).sendToTarget();
}
}
private void prepareInternal(MediaSource mediaSource, boolean resetPosition) {
eventHandler.sendEmptyMessage(MSG_PREPARE_ACK);
resetInternal(true);
loadControl.onPrepared();
if (resetPosition) {
playbackInfo = new PlaybackInfo(0, C.TIME_UNSET);
}
this.mediaSource = mediaSource;
mediaSource.prepareSource(player, true, this);
setState(ExoPlayer.STATE_BUFFERING);
handler.sendEmptyMessage(MSG_DO_SOME_WORK);
}
private void setPlayWhenReadyInternal(boolean playWhenReady) throws ExoPlaybackException {
rebuffering = false;
this.playWhenReady = playWhenReady;
if (!playWhenReady) {
stopRenderers();
updatePlaybackPositions();
} else {
if (state == ExoPlayer.STATE_READY) {
startRenderers();
handler.sendEmptyMessage(MSG_DO_SOME_WORK);
} else if (state == ExoPlayer.STATE_BUFFERING) {
handler.sendEmptyMessage(MSG_DO_SOME_WORK);
}
}
}
private void startRenderers() throws ExoPlaybackException {
rebuffering = false;
standaloneMediaClock.start();
for (Renderer renderer : enabledRenderers) {
renderer.start();
}
}
private void stopRenderers() throws ExoPlaybackException {
standaloneMediaClock.stop();
for (Renderer renderer : enabledRenderers) {
ensureStopped(renderer);
}
}
private void updatePlaybackPositions() throws ExoPlaybackException {
if (playingPeriodHolder == null) {
return;
}
// Update the playback position.
long periodPositionUs = playingPeriodHolder.mediaPeriod.readDiscontinuity();
if (periodPositionUs != C.TIME_UNSET) {
resetRendererPosition(periodPositionUs);
} else {
if (rendererMediaClockSource != null && !rendererMediaClockSource.isEnded()) {
rendererPositionUs = rendererMediaClock.getPositionUs();
standaloneMediaClock.setPositionUs(rendererPositionUs);
} else {
rendererPositionUs = standaloneMediaClock.getPositionUs();
}
periodPositionUs = playingPeriodHolder.toPeriodTime(rendererPositionUs);
}
playbackInfo.positionUs = periodPositionUs;
elapsedRealtimeUs = SystemClock.elapsedRealtime() * 1000;
// Update the buffered position.
long bufferedPositionUs = enabledRenderers.length == 0 ? C.TIME_END_OF_SOURCE
: playingPeriodHolder.mediaPeriod.getBufferedPositionUs();
playbackInfo.bufferedPositionUs = bufferedPositionUs == C.TIME_END_OF_SOURCE
? timeline.getPeriod(playingPeriodHolder.index, period).getDurationUs()
: bufferedPositionUs;
}
private void doSomeWork() throws ExoPlaybackException, IOException {
long operationStartTimeMs = SystemClock.elapsedRealtime();
updatePeriods();
if (playingPeriodHolder == null) {
// We're still waiting for the first period to be prepared.
maybeThrowPeriodPrepareError();
scheduleNextWork(operationStartTimeMs, PREPARING_SOURCE_INTERVAL_MS);
return;
}
TraceUtil.beginSection("doSomeWork");
updatePlaybackPositions();
playingPeriodHolder.mediaPeriod.discardBuffer(playbackInfo.positionUs);
boolean allRenderersEnded = true;
boolean allRenderersReadyOrEnded = true;
for (Renderer renderer : enabledRenderers) {
// TODO: Each renderer should return the maximum delay before which it wishes to be called
// again. The minimum of these values should then be used as the delay before the next
// invocation of this method.
renderer.render(rendererPositionUs, elapsedRealtimeUs);
allRenderersEnded = allRenderersEnded && renderer.isEnded();
// Determine whether the renderer is ready (or ended). If it's not, throw an error that's
// preventing the renderer from making progress, if such an error exists.
boolean rendererReadyOrEnded = renderer.isReady() || renderer.isEnded();
if (!rendererReadyOrEnded) {
renderer.maybeThrowStreamError();
}
allRenderersReadyOrEnded = allRenderersReadyOrEnded && rendererReadyOrEnded;
}
if (!allRenderersReadyOrEnded) {
maybeThrowPeriodPrepareError();
}
// The standalone media clock never changes playback parameters, so just check the renderer.
if (rendererMediaClock != null) {
PlaybackParameters playbackParameters = rendererMediaClock.getPlaybackParameters();
if (!playbackParameters.equals(this.playbackParameters)) {
// TODO: Make LoadControl, period transition position projection, adaptive track selection
// and potentially any time-related code in renderers take into account the playback speed.
this.playbackParameters = playbackParameters;
standaloneMediaClock.synchronize(rendererMediaClock);
eventHandler.obtainMessage(MSG_PLAYBACK_PARAMETERS_CHANGED, playbackParameters)
.sendToTarget();
}
}
long playingPeriodDurationUs = timeline.getPeriod(playingPeriodHolder.index, period)
.getDurationUs();
if (allRenderersEnded
&& (playingPeriodDurationUs == C.TIME_UNSET
|| playingPeriodDurationUs <= playbackInfo.positionUs)
&& playingPeriodHolder.isLast) {
setState(ExoPlayer.STATE_ENDED);
stopRenderers();
} else if (state == ExoPlayer.STATE_BUFFERING) {
boolean isNewlyReady = enabledRenderers.length > 0
? (allRenderersReadyOrEnded && haveSufficientBuffer(rebuffering))
: isTimelineReady(playingPeriodDurationUs);
if (isNewlyReady) {
setState(ExoPlayer.STATE_READY);
if (playWhenReady) {
startRenderers();
}
}
} else if (state == ExoPlayer.STATE_READY) {
boolean isStillReady = enabledRenderers.length > 0 ? allRenderersReadyOrEnded
: isTimelineReady(playingPeriodDurationUs);
if (!isStillReady) {
rebuffering = playWhenReady;
setState(ExoPlayer.STATE_BUFFERING);
stopRenderers();
}
}
if (state == ExoPlayer.STATE_BUFFERING) {
for (Renderer renderer : enabledRenderers) {
renderer.maybeThrowStreamError();
}
}
if ((playWhenReady && state == ExoPlayer.STATE_READY) || state == ExoPlayer.STATE_BUFFERING) {
scheduleNextWork(operationStartTimeMs, RENDERING_INTERVAL_MS);
} else if (enabledRenderers.length != 0) {
scheduleNextWork(operationStartTimeMs, IDLE_INTERVAL_MS);
} else {
handler.removeMessages(MSG_DO_SOME_WORK);
}
TraceUtil.endSection();
}
private void scheduleNextWork(long thisOperationStartTimeMs, long intervalMs) {
handler.removeMessages(MSG_DO_SOME_WORK);
long nextOperationStartTimeMs = thisOperationStartTimeMs + intervalMs;
long nextOperationDelayMs = nextOperationStartTimeMs - SystemClock.elapsedRealtime();
if (nextOperationDelayMs <= 0) {
handler.sendEmptyMessage(MSG_DO_SOME_WORK);
} else {
handler.sendEmptyMessageDelayed(MSG_DO_SOME_WORK, nextOperationDelayMs);
}
}
private void seekToInternal(SeekPosition seekPosition) throws ExoPlaybackException {
if (timeline == null) {
pendingInitialSeekCount++;
pendingSeekPosition = seekPosition;
return;
}
Pair<Integer, Long> periodPosition = resolveSeekPosition(seekPosition);
if (periodPosition == null) {
// The seek position was valid for the timeline that it was performed into, but the
// timeline has changed and a suitable seek position could not be resolved in the new one.
playbackInfo = new PlaybackInfo(0, 0);
eventHandler.obtainMessage(MSG_SEEK_ACK, 1, 0, playbackInfo).sendToTarget();
// Set the internal position to (0,TIME_UNSET) so that a subsequent seek to (0,0) isn't
// ignored.
playbackInfo = new PlaybackInfo(0, C.TIME_UNSET);
setState(ExoPlayer.STATE_ENDED);
// Reset, but retain the source so that it can still be used should a seek occur.
resetInternal(false);
return;
}
boolean seekPositionAdjusted = seekPosition.windowPositionUs == C.TIME_UNSET;
int periodIndex = periodPosition.first;
long periodPositionUs = periodPosition.second;
try {
if (periodIndex == playbackInfo.periodIndex
&& ((periodPositionUs / 1000) == (playbackInfo.positionUs / 1000))) {
// Seek position equals the current position. Do nothing.
return;
}
long newPeriodPositionUs = seekToPeriodPosition(periodIndex, periodPositionUs);
seekPositionAdjusted |= periodPositionUs != newPeriodPositionUs;
periodPositionUs = newPeriodPositionUs;
} finally {
playbackInfo = new PlaybackInfo(periodIndex, periodPositionUs);
eventHandler.obtainMessage(MSG_SEEK_ACK, seekPositionAdjusted ? 1 : 0, 0, playbackInfo)
.sendToTarget();
}
}
private long seekToPeriodPosition(int periodIndex, long periodPositionUs)
throws ExoPlaybackException {
stopRenderers();
rebuffering = false;
setState(ExoPlayer.STATE_BUFFERING);
MediaPeriodHolder newPlayingPeriodHolder = null;
if (playingPeriodHolder == null) {
// We're still waiting for the first period to be prepared.
if (loadingPeriodHolder != null) {
loadingPeriodHolder.release();
}
} else {
// Clear the timeline, but keep the requested period if it is already prepared.
MediaPeriodHolder periodHolder = playingPeriodHolder;
while (periodHolder != null) {
if (periodHolder.index == periodIndex && periodHolder.prepared) {
newPlayingPeriodHolder = periodHolder;
} else {
periodHolder.release();
}
periodHolder = periodHolder.next;
}
}
// Disable all the renderers if the period being played is changing, or if the renderers are
// reading from a period other than the one being played.
if (playingPeriodHolder != newPlayingPeriodHolder
|| playingPeriodHolder != readingPeriodHolder) {
for (Renderer renderer : enabledRenderers) {
renderer.disable();
}
enabledRenderers = new Renderer[0];
rendererMediaClock = null;
rendererMediaClockSource = null;
playingPeriodHolder = null;
}
// Update the holders.
if (newPlayingPeriodHolder != null) {
newPlayingPeriodHolder.next = null;
loadingPeriodHolder = newPlayingPeriodHolder;
readingPeriodHolder = newPlayingPeriodHolder;
setPlayingPeriodHolder(newPlayingPeriodHolder);
if (playingPeriodHolder.hasEnabledTracks) {
periodPositionUs = playingPeriodHolder.mediaPeriod.seekToUs(periodPositionUs);
}
resetRendererPosition(periodPositionUs);
maybeContinueLoading();
} else {
loadingPeriodHolder = null;
readingPeriodHolder = null;
playingPeriodHolder = null;
resetRendererPosition(periodPositionUs);
}
handler.sendEmptyMessage(MSG_DO_SOME_WORK);
return periodPositionUs;
}
private void resetRendererPosition(long periodPositionUs) throws ExoPlaybackException {
rendererPositionUs = playingPeriodHolder == null
? periodPositionUs + RENDERER_TIMESTAMP_OFFSET_US
: playingPeriodHolder.toRendererTime(periodPositionUs);
standaloneMediaClock.setPositionUs(rendererPositionUs);
for (Renderer renderer : enabledRenderers) {
renderer.resetPosition(rendererPositionUs);
}
}
private void setPlaybackParametersInternal(PlaybackParameters playbackParameters) {
playbackParameters = rendererMediaClock != null
? rendererMediaClock.setPlaybackParameters(playbackParameters)
: standaloneMediaClock.setPlaybackParameters(playbackParameters);
this.playbackParameters = playbackParameters;
eventHandler.obtainMessage(MSG_PLAYBACK_PARAMETERS_CHANGED, playbackParameters).sendToTarget();
}
private void stopInternal() {
resetInternal(true);
loadControl.onStopped();
setState(ExoPlayer.STATE_IDLE);
}
private void releaseInternal() {
resetInternal(true);
loadControl.onReleased();
setState(ExoPlayer.STATE_IDLE);
synchronized (this) {
released = true;
notifyAll();
}
}
private void resetInternal(boolean releaseMediaSource) {
handler.removeMessages(MSG_DO_SOME_WORK);
rebuffering = false;
standaloneMediaClock.stop();
rendererMediaClock = null;
rendererMediaClockSource = null;
rendererPositionUs = RENDERER_TIMESTAMP_OFFSET_US;
for (Renderer renderer : enabledRenderers) {
try {
ensureStopped(renderer);
renderer.disable();
} catch (ExoPlaybackException | RuntimeException e) {
// There's nothing we can do.
Log.e(TAG, "Stop failed.", e);
}
}
enabledRenderers = new Renderer[0];
releasePeriodHoldersFrom(playingPeriodHolder != null ? playingPeriodHolder
: loadingPeriodHolder);
loadingPeriodHolder = null;
readingPeriodHolder = null;
playingPeriodHolder = null;
setIsLoading(false);
if (releaseMediaSource) {
if (mediaSource != null) {
mediaSource.releaseSource();
mediaSource = null;
}
timeline = null;
}
}
private void sendMessagesInternal(ExoPlayerMessage[] messages) throws ExoPlaybackException {
try {
for (ExoPlayerMessage message : messages) {
message.target.handleMessage(message.messageType, message.message);
}
if (mediaSource != null) {
// The message may have caused something to change that now requires us to do work.
handler.sendEmptyMessage(MSG_DO_SOME_WORK);
}
} finally {
synchronized (this) {
customMessagesProcessed++;
notifyAll();
}
}
}
private void ensureStopped(Renderer renderer) throws ExoPlaybackException {
if (renderer.getState() == Renderer.STATE_STARTED) {
renderer.stop();
}
}
private void reselectTracksInternal() throws ExoPlaybackException {
if (playingPeriodHolder == null) {
// We don't have tracks yet, so we don't care.
return;
}
// Reselect tracks on each period in turn, until the selection changes.
MediaPeriodHolder periodHolder = playingPeriodHolder;
boolean selectionsChangedForReadPeriod = true;
while (true) {
if (periodHolder == null || !periodHolder.prepared) {
// The reselection did not change any prepared periods.
return;
}
if (periodHolder.selectTracks()) {
// Selected tracks have changed for this period.
break;
}
if (periodHolder == readingPeriodHolder) {
// The track reselection didn't affect any period that has been read.
selectionsChangedForReadPeriod = false;
}
periodHolder = periodHolder.next;
}
if (selectionsChangedForReadPeriod) {
// Update streams and rebuffer for the new selection, recreating all streams if reading ahead.
boolean recreateStreams = readingPeriodHolder != playingPeriodHolder;
releasePeriodHoldersFrom(playingPeriodHolder.next);
playingPeriodHolder.next = null;
loadingPeriodHolder = playingPeriodHolder;
readingPeriodHolder = playingPeriodHolder;
boolean[] streamResetFlags = new boolean[renderers.length];
long periodPositionUs = playingPeriodHolder.updatePeriodTrackSelection(
playbackInfo.positionUs, recreateStreams, streamResetFlags);
if (periodPositionUs != playbackInfo.positionUs) {
playbackInfo.positionUs = periodPositionUs;
resetRendererPosition(periodPositionUs);
}
int enabledRendererCount = 0;
boolean[] rendererWasEnabledFlags = new boolean[renderers.length];
for (int i = 0; i < renderers.length; i++) {
Renderer renderer = renderers[i];
rendererWasEnabledFlags[i] = renderer.getState() != Renderer.STATE_DISABLED;
SampleStream sampleStream = playingPeriodHolder.sampleStreams[i];
if (sampleStream != null) {
enabledRendererCount++;
}
if (rendererWasEnabledFlags[i]) {
if (sampleStream != renderer.getStream()) {
// We need to disable the renderer.
if (renderer == rendererMediaClockSource) {
// The renderer is providing the media clock.
if (sampleStream == null) {
// The renderer won't be re-enabled. Sync standaloneMediaClock so that it can take
// over timing responsibilities.
standaloneMediaClock.synchronize(rendererMediaClock);
}
rendererMediaClock = null;
rendererMediaClockSource = null;
}
ensureStopped(renderer);
renderer.disable();
} else if (streamResetFlags[i]) {
// The renderer will continue to consume from its current stream, but needs to be reset.
renderer.resetPosition(rendererPositionUs);
}
}
}
eventHandler.obtainMessage(MSG_TRACKS_CHANGED, periodHolder.trackSelectorResult)
.sendToTarget();
enableRenderers(rendererWasEnabledFlags, enabledRendererCount);
} else {
// Release and re-prepare/buffer periods after the one whose selection changed.
loadingPeriodHolder = periodHolder;
periodHolder = loadingPeriodHolder.next;
while (periodHolder != null) {
periodHolder.release();
periodHolder = periodHolder.next;
}
loadingPeriodHolder.next = null;
if (loadingPeriodHolder.prepared) {
long loadingPeriodPositionUs = Math.max(loadingPeriodHolder.startPositionUs,
loadingPeriodHolder.toPeriodTime(rendererPositionUs));
loadingPeriodHolder.updatePeriodTrackSelection(loadingPeriodPositionUs, false);
}
}
maybeContinueLoading();
updatePlaybackPositions();
handler.sendEmptyMessage(MSG_DO_SOME_WORK);
}
private boolean isTimelineReady(long playingPeriodDurationUs) {
return playingPeriodDurationUs == C.TIME_UNSET
|| playbackInfo.positionUs < playingPeriodDurationUs
|| (playingPeriodHolder.next != null && playingPeriodHolder.next.prepared);
}
private boolean haveSufficientBuffer(boolean rebuffering) {
long loadingPeriodBufferedPositionUs = !loadingPeriodHolder.prepared
? loadingPeriodHolder.startPositionUs
: loadingPeriodHolder.mediaPeriod.getBufferedPositionUs();
if (loadingPeriodBufferedPositionUs == C.TIME_END_OF_SOURCE) {
if (loadingPeriodHolder.isLast) {
return true;
}
loadingPeriodBufferedPositionUs = timeline.getPeriod(loadingPeriodHolder.index, period)
.getDurationUs();
}
return loadControl.shouldStartPlayback(
loadingPeriodBufferedPositionUs - loadingPeriodHolder.toPeriodTime(rendererPositionUs),
rebuffering);
}
private void maybeThrowPeriodPrepareError() throws IOException {
if (loadingPeriodHolder != null && !loadingPeriodHolder.prepared
&& (readingPeriodHolder == null || readingPeriodHolder.next == loadingPeriodHolder)) {
for (Renderer renderer : enabledRenderers) {
if (!renderer.hasReadStreamToEnd()) {
return;
}
}
loadingPeriodHolder.mediaPeriod.maybeThrowPrepareError();
}
}
private void handleSourceInfoRefreshed(Pair<Timeline, Object> timelineAndManifest)
throws ExoPlaybackException {
Timeline oldTimeline = timeline;
timeline = timelineAndManifest.first;
Object manifest = timelineAndManifest.second;
int processedInitialSeekCount = 0;
if (oldTimeline == null) {
if (pendingInitialSeekCount > 0) {
Pair<Integer, Long> periodPosition = resolveSeekPosition(pendingSeekPosition);
processedInitialSeekCount = pendingInitialSeekCount;
pendingInitialSeekCount = 0;
pendingSeekPosition = null;
if (periodPosition == null) {
// The seek position was valid for the timeline that it was performed into, but the
// timeline has changed and a suitable seek position could not be resolved in the new one.
handleSourceInfoRefreshEndedPlayback(manifest, processedInitialSeekCount);
return;
}
playbackInfo = new PlaybackInfo(periodPosition.first, periodPosition.second);
} else if (playbackInfo.startPositionUs == C.TIME_UNSET) {
if (timeline.isEmpty()) {
handleSourceInfoRefreshEndedPlayback(manifest, processedInitialSeekCount);
return;
}
Pair<Integer, Long> defaultPosition = getPeriodPosition(0, C.TIME_UNSET);
playbackInfo = new PlaybackInfo(defaultPosition.first, defaultPosition.second);
}
}
MediaPeriodHolder periodHolder = playingPeriodHolder != null ? playingPeriodHolder
: loadingPeriodHolder;
if (periodHolder == null) {
// We don't have any period holders, so we're done.
notifySourceInfoRefresh(manifest, processedInitialSeekCount);
return;
}
int periodIndex = timeline.getIndexOfPeriod(periodHolder.uid);
if (periodIndex == C.INDEX_UNSET) {
// We didn't find the current period in the new timeline. Attempt to resolve a subsequent
// period whose window we can restart from.
int newPeriodIndex = resolveSubsequentPeriod(periodHolder.index, oldTimeline, timeline);
if (newPeriodIndex == C.INDEX_UNSET) {
// We failed to resolve a suitable restart position.
handleSourceInfoRefreshEndedPlayback(manifest, processedInitialSeekCount);
return;
}
// We resolved a subsequent period. Seek to the default position in the corresponding window.
Pair<Integer, Long> defaultPosition = getPeriodPosition(
timeline.getPeriod(newPeriodIndex, period).windowIndex, C.TIME_UNSET);
newPeriodIndex = defaultPosition.first;
long newPositionUs = defaultPosition.second;
timeline.getPeriod(newPeriodIndex, period, true);
// Clear the index of each holder that doesn't contain the default position. If a holder
// contains the default position then update its index so it can be re-used when seeking.
Object newPeriodUid = period.uid;
periodHolder.index = C.INDEX_UNSET;
while (periodHolder.next != null) {
periodHolder = periodHolder.next;
periodHolder.index = periodHolder.uid.equals(newPeriodUid) ? newPeriodIndex : C.INDEX_UNSET;
}
// Actually do the seek.
newPositionUs = seekToPeriodPosition(newPeriodIndex, newPositionUs);
playbackInfo = new PlaybackInfo(newPeriodIndex, newPositionUs);
notifySourceInfoRefresh(manifest, processedInitialSeekCount);
return;
}
// The current period is in the new timeline. Update the holder and playbackInfo.
timeline.getPeriod(periodIndex, period);
boolean isLastPeriod = periodIndex == timeline.getPeriodCount() - 1
&& !timeline.getWindow(period.windowIndex, window).isDynamic;
periodHolder.setIndex(periodIndex, isLastPeriod);
boolean seenReadingPeriod = periodHolder == readingPeriodHolder;
if (periodIndex != playbackInfo.periodIndex) {
playbackInfo = playbackInfo.copyWithPeriodIndex(periodIndex);
}
// If there are subsequent holders, update the index for each of them. If we find a holder
// that's inconsistent with the new timeline then take appropriate action.
while (periodHolder.next != null) {
MediaPeriodHolder previousPeriodHolder = periodHolder;
periodHolder = periodHolder.next;
periodIndex++;
timeline.getPeriod(periodIndex, period, true);
isLastPeriod = periodIndex == timeline.getPeriodCount() - 1
&& !timeline.getWindow(period.windowIndex, window).isDynamic;
if (periodHolder.uid.equals(period.uid)) {
// The holder is consistent with the new timeline. Update its index and continue.
periodHolder.setIndex(periodIndex, isLastPeriod);
seenReadingPeriod |= (periodHolder == readingPeriodHolder);
} else {
// The holder is inconsistent with the new timeline.
if (!seenReadingPeriod) {
// Renderers may have read from a period that's been removed. Seek back to the current
// position of the playing period to make sure none of the removed period is played.
periodIndex = playingPeriodHolder.index;
long newPositionUs = seekToPeriodPosition(periodIndex, playbackInfo.positionUs);
playbackInfo = new PlaybackInfo(periodIndex, newPositionUs);
} else {
// Update the loading period to be the last period that's still valid, and release all
// subsequent periods.
loadingPeriodHolder = previousPeriodHolder;
loadingPeriodHolder.next = null;
// Release the rest of the timeline.
releasePeriodHoldersFrom(periodHolder);
}
break;
}
}
notifySourceInfoRefresh(manifest, processedInitialSeekCount);
}
private void handleSourceInfoRefreshEndedPlayback(Object manifest,
int processedInitialSeekCount) {
// Set the playback position to (0,0) for notifying the eventHandler.
playbackInfo = new PlaybackInfo(0, 0);
notifySourceInfoRefresh(manifest, processedInitialSeekCount);
// Set the internal position to (0,TIME_UNSET) so that a subsequent seek to (0,0) isn't ignored.
playbackInfo = new PlaybackInfo(0, C.TIME_UNSET);
setState(ExoPlayer.STATE_ENDED);
// Reset, but retain the source so that it can still be used should a seek occur.
resetInternal(false);
}
private void notifySourceInfoRefresh(Object manifest, int processedInitialSeekCount) {
eventHandler.obtainMessage(MSG_SOURCE_INFO_REFRESHED,
new SourceInfo(timeline, manifest, playbackInfo, processedInitialSeekCount)).sendToTarget();
}
/**
* Given a period index into an old timeline, finds the first subsequent period that also exists
* in a new timeline. The index of this period in the new timeline is returned.
*
* @param oldPeriodIndex The index of the period in the old timeline.
* @param oldTimeline The old timeline.
* @param newTimeline The new timeline.
* @return The index in the new timeline of the first subsequent period, or {@link C#INDEX_UNSET}
* if no such period was found.
*/
private int resolveSubsequentPeriod(int oldPeriodIndex, Timeline oldTimeline,
Timeline newTimeline) {
int newPeriodIndex = C.INDEX_UNSET;
while (newPeriodIndex == C.INDEX_UNSET && oldPeriodIndex < oldTimeline.getPeriodCount() - 1) {
newPeriodIndex = newTimeline.getIndexOfPeriod(
oldTimeline.getPeriod(++oldPeriodIndex, period, true).uid);
}
return newPeriodIndex;
}
/**
* Converts a {@link SeekPosition} into the corresponding (periodIndex, periodPositionUs) for the
* internal timeline.
*
* @param seekPosition The position to resolve.
* @return The resolved position, or null if resolution was not successful.
* @throws IllegalSeekPositionException If the window index of the seek position is outside the
* bounds of the timeline.
*/
private Pair<Integer, Long> resolveSeekPosition(SeekPosition seekPosition) {
Timeline seekTimeline = seekPosition.timeline;
if (seekTimeline.isEmpty()) {
// The application performed a blind seek without a non-empty timeline (most likely based on
// knowledge of what the future timeline will be). Use the internal timeline.
seekTimeline = timeline;
}
// Map the SeekPosition to a position in the corresponding timeline.
Pair<Integer, Long> periodPosition;
try {
periodPosition = getPeriodPosition(seekTimeline, seekPosition.windowIndex,
seekPosition.windowPositionUs);
} catch (IndexOutOfBoundsException e) {
// The window index of the seek position was outside the bounds of the timeline.
throw new IllegalSeekPositionException(timeline, seekPosition.windowIndex,
seekPosition.windowPositionUs);
}
if (timeline == seekTimeline) {
// Our internal timeline is the seek timeline, so the mapped position is correct.
return periodPosition;
}
// Attempt to find the mapped period in the internal timeline.
int periodIndex = timeline.getIndexOfPeriod(
seekTimeline.getPeriod(periodPosition.first, period, true).uid);
if (periodIndex != C.INDEX_UNSET) {
// We successfully located the period in the internal timeline.
return Pair.create(periodIndex, periodPosition.second);
}
// Try and find a subsequent period from the seek timeline in the internal timeline.
periodIndex = resolveSubsequentPeriod(periodPosition.first, seekTimeline, timeline);
if (periodIndex != C.INDEX_UNSET) {
// We found one. Map the SeekPosition onto the corresponding default position.
return getPeriodPosition(timeline.getPeriod(periodIndex, period).windowIndex, C.TIME_UNSET);
}
// We didn't find one. Give up.
return null;
}
/**
* Calls {@link #getPeriodPosition(Timeline, int, long)} using the current timeline.
*/
private Pair<Integer, Long> getPeriodPosition(int windowIndex, long windowPositionUs) {
return getPeriodPosition(timeline, windowIndex, windowPositionUs);
}
/**
* Calls {@link #getPeriodPosition(Timeline, int, long, long)} with a zero default position
* projection.
*/
private Pair<Integer, Long> getPeriodPosition(Timeline timeline, int windowIndex,
long windowPositionUs) {
return getPeriodPosition(timeline, windowIndex, windowPositionUs, 0);
}
/**
* Converts (windowIndex, windowPositionUs) to the corresponding (periodIndex, periodPositionUs).
*
* @param timeline The timeline containing the window.
* @param windowIndex The window index.
* @param windowPositionUs The window time, or {@link C#TIME_UNSET} to use the window's default
* start position.
* @param defaultPositionProjectionUs If {@code windowPositionUs} is {@link C#TIME_UNSET}, the
* duration into the future by which the window's position should be projected.
* @return The corresponding (periodIndex, periodPositionUs), or null if {@code #windowPositionUs}
* is {@link C#TIME_UNSET}, {@code defaultPositionProjectionUs} is non-zero, and the window's
* position could not be projected by {@code defaultPositionProjectionUs}.
*/
private Pair<Integer, Long> getPeriodPosition(Timeline timeline, int windowIndex,
long windowPositionUs, long defaultPositionProjectionUs) {
Assertions.checkIndex(windowIndex, 0, timeline.getWindowCount());
timeline.getWindow(windowIndex, window, false, defaultPositionProjectionUs);
if (windowPositionUs == C.TIME_UNSET) {
windowPositionUs = window.getDefaultPositionUs();
if (windowPositionUs == C.TIME_UNSET) {
return null;
}
}
int periodIndex = window.firstPeriodIndex;
long periodPositionUs = window.getPositionInFirstPeriodUs() + windowPositionUs;
long periodDurationUs = timeline.getPeriod(periodIndex, period).getDurationUs();
while (periodDurationUs != C.TIME_UNSET && periodPositionUs >= periodDurationUs
&& periodIndex < window.lastPeriodIndex) {
periodPositionUs -= periodDurationUs;
periodDurationUs = timeline.getPeriod(++periodIndex, period).getDurationUs();
}
return Pair.create(periodIndex, periodPositionUs);
}
private void updatePeriods() throws ExoPlaybackException, IOException {
if (timeline == null) {
// We're waiting to get information about periods.
mediaSource.maybeThrowSourceInfoRefreshError();
return;
}
// Update the loading period if required.
maybeUpdateLoadingPeriod();
if (loadingPeriodHolder == null || loadingPeriodHolder.isFullyBuffered()) {
setIsLoading(false);
} else if (loadingPeriodHolder != null && loadingPeriodHolder.needsContinueLoading) {
maybeContinueLoading();
}
if (playingPeriodHolder == null) {
// We're waiting for the first period to be prepared.
return;
}
// Update the playing and reading periods.
while (playingPeriodHolder != readingPeriodHolder
&& rendererPositionUs >= playingPeriodHolder.next.rendererPositionOffsetUs) {
// All enabled renderers' streams have been read to the end, and the playback position reached
// the end of the playing period, so advance playback to the next period.
playingPeriodHolder.release();
setPlayingPeriodHolder(playingPeriodHolder.next);
playbackInfo = new PlaybackInfo(playingPeriodHolder.index,
playingPeriodHolder.startPositionUs);
updatePlaybackPositions();
eventHandler.obtainMessage(MSG_POSITION_DISCONTINUITY, playbackInfo).sendToTarget();
}
if (readingPeriodHolder.isLast) {
for (int i = 0; i < renderers.length; i++) {
Renderer renderer = renderers[i];
SampleStream sampleStream = readingPeriodHolder.sampleStreams[i];
// Defer setting the stream as final until the renderer has actually consumed the whole
// stream in case of playlist changes that cause the stream to be no longer final.
if (sampleStream != null && renderer.getStream() == sampleStream
&& renderer.hasReadStreamToEnd()) {
renderer.setCurrentStreamFinal();
}
}
return;
}
for (int i = 0; i < renderers.length; i++) {
Renderer renderer = renderers[i];
SampleStream sampleStream = readingPeriodHolder.sampleStreams[i];
if (renderer.getStream() != sampleStream
|| (sampleStream != null && !renderer.hasReadStreamToEnd())) {
return;
}
}
if (readingPeriodHolder.next != null && readingPeriodHolder.next.prepared) {
TrackSelectorResult oldTrackSelectorResult = readingPeriodHolder.trackSelectorResult;
readingPeriodHolder = readingPeriodHolder.next;
TrackSelectorResult newTrackSelectorResult = readingPeriodHolder.trackSelectorResult;
boolean initialDiscontinuity =
readingPeriodHolder.mediaPeriod.readDiscontinuity() != C.TIME_UNSET;
for (int i = 0; i < renderers.length; i++) {
Renderer renderer = renderers[i];
TrackSelection oldSelection = oldTrackSelectorResult.selections.get(i);
if (oldSelection == null) {
// The renderer has no current stream and will be enabled when we play the next period.
} else if (initialDiscontinuity) {
// The new period starts with a discontinuity, so the renderer will play out all data then
// be disabled and re-enabled when it starts playing the next period.
renderer.setCurrentStreamFinal();
} else if (!renderer.isCurrentStreamFinal()) {
TrackSelection newSelection = newTrackSelectorResult.selections.get(i);
RendererConfiguration oldConfig = oldTrackSelectorResult.rendererConfigurations[i];
RendererConfiguration newConfig = newTrackSelectorResult.rendererConfigurations[i];
if (newSelection != null && newConfig.equals(oldConfig)) {
// Replace the renderer's SampleStream so the transition to playing the next period can
// be seamless.
Format[] formats = new Format[newSelection.length()];
for (int j = 0; j < formats.length; j++) {
formats[j] = newSelection.getFormat(j);
}
renderer.replaceStream(formats, readingPeriodHolder.sampleStreams[i],
readingPeriodHolder.getRendererOffset());
} else {
// The renderer will be disabled when transitioning to playing the next period, either
// because there's no new selection or because a configuration change is required. Mark
// the SampleStream as final to play out any remaining data.
renderer.setCurrentStreamFinal();
}
}
}
}
}
private void maybeUpdateLoadingPeriod() throws IOException {
int newLoadingPeriodIndex;
if (loadingPeriodHolder == null) {
newLoadingPeriodIndex = playbackInfo.periodIndex;
} else {
int loadingPeriodIndex = loadingPeriodHolder.index;
if (loadingPeriodHolder.isLast || !loadingPeriodHolder.isFullyBuffered()
|| timeline.getPeriod(loadingPeriodIndex, period).getDurationUs() == C.TIME_UNSET) {
// Either the existing loading period is the last period, or we are not ready to advance to
// loading the next period because it hasn't been fully buffered or its duration is unknown.
return;
}
if (playingPeriodHolder != null
&& loadingPeriodIndex - playingPeriodHolder.index == MAXIMUM_BUFFER_AHEAD_PERIODS) {
// We are already buffering the maximum number of periods ahead.
return;
}
newLoadingPeriodIndex = loadingPeriodHolder.index + 1;
}
if (newLoadingPeriodIndex >= timeline.getPeriodCount()) {
// The next period is not available yet.
mediaSource.maybeThrowSourceInfoRefreshError();
return;
}
long newLoadingPeriodStartPositionUs;
if (loadingPeriodHolder == null) {
newLoadingPeriodStartPositionUs = playbackInfo.positionUs;
} else {
int newLoadingWindowIndex = timeline.getPeriod(newLoadingPeriodIndex, period).windowIndex;
if (newLoadingPeriodIndex
!= timeline.getWindow(newLoadingWindowIndex, window).firstPeriodIndex) {
// We're starting to buffer a new period in the current window. Always start from the
// beginning of the period.
newLoadingPeriodStartPositionUs = 0;
} else {
// We're starting to buffer a new window. When playback transitions to this window we'll
// want it to be from its default start position. The expected delay until playback
// transitions is equal the duration of media that's currently buffered (assuming no
// interruptions). Hence we project the default start position forward by the duration of
// the buffer, and start buffering from this point.
long defaultPositionProjectionUs = loadingPeriodHolder.getRendererOffset()
+ timeline.getPeriod(loadingPeriodHolder.index, period).getDurationUs()
- rendererPositionUs;
Pair<Integer, Long> defaultPosition = getPeriodPosition(timeline, newLoadingWindowIndex,
C.TIME_UNSET, Math.max(0, defaultPositionProjectionUs));
if (defaultPosition == null) {
return;
}
newLoadingPeriodIndex = defaultPosition.first;
newLoadingPeriodStartPositionUs = defaultPosition.second;
}
}
long rendererPositionOffsetUs = loadingPeriodHolder == null
? newLoadingPeriodStartPositionUs + RENDERER_TIMESTAMP_OFFSET_US
: (loadingPeriodHolder.getRendererOffset()
+ timeline.getPeriod(loadingPeriodHolder.index, period).getDurationUs());
timeline.getPeriod(newLoadingPeriodIndex, period, true);
boolean isLastPeriod = newLoadingPeriodIndex == timeline.getPeriodCount() - 1
&& !timeline.getWindow(period.windowIndex, window).isDynamic;
MediaPeriodHolder newPeriodHolder = new MediaPeriodHolder(renderers, rendererCapabilities,
rendererPositionOffsetUs, trackSelector, loadControl, mediaSource, period.uid,
newLoadingPeriodIndex, isLastPeriod, newLoadingPeriodStartPositionUs);
if (loadingPeriodHolder != null) {
loadingPeriodHolder.next = newPeriodHolder;
}
loadingPeriodHolder = newPeriodHolder;
loadingPeriodHolder.mediaPeriod.prepare(this);
setIsLoading(true);
}
private void handlePeriodPrepared(MediaPeriod period) throws ExoPlaybackException {
if (loadingPeriodHolder == null || loadingPeriodHolder.mediaPeriod != period) {
// Stale event.
return;
}
loadingPeriodHolder.handlePrepared();
if (playingPeriodHolder == null) {
// This is the first prepared period, so start playing it.
readingPeriodHolder = loadingPeriodHolder;
resetRendererPosition(readingPeriodHolder.startPositionUs);
setPlayingPeriodHolder(readingPeriodHolder);
}
maybeContinueLoading();
}
private void handleContinueLoadingRequested(MediaPeriod period) {
if (loadingPeriodHolder == null || loadingPeriodHolder.mediaPeriod != period) {
// Stale event.
return;
}
maybeContinueLoading();
}
private void maybeContinueLoading() {
long nextLoadPositionUs = !loadingPeriodHolder.prepared ? 0
: loadingPeriodHolder.mediaPeriod.getNextLoadPositionUs();
if (nextLoadPositionUs == C.TIME_END_OF_SOURCE) {
setIsLoading(false);
} else {
long loadingPeriodPositionUs = loadingPeriodHolder.toPeriodTime(rendererPositionUs);
long bufferedDurationUs = nextLoadPositionUs - loadingPeriodPositionUs;
boolean continueLoading = loadControl.shouldContinueLoading(bufferedDurationUs);
setIsLoading(continueLoading);
if (continueLoading) {
loadingPeriodHolder.needsContinueLoading = false;
loadingPeriodHolder.mediaPeriod.continueLoading(loadingPeriodPositionUs);
} else {
loadingPeriodHolder.needsContinueLoading = true;
}
}
}
private void releasePeriodHoldersFrom(MediaPeriodHolder periodHolder) {
while (periodHolder != null) {
periodHolder.release();
periodHolder = periodHolder.next;
}
}
private void setPlayingPeriodHolder(MediaPeriodHolder periodHolder) throws ExoPlaybackException {
if (playingPeriodHolder == periodHolder) {
return;
}
int enabledRendererCount = 0;
boolean[] rendererWasEnabledFlags = new boolean[renderers.length];
for (int i = 0; i < renderers.length; i++) {
Renderer renderer = renderers[i];
rendererWasEnabledFlags[i] = renderer.getState() != Renderer.STATE_DISABLED;
TrackSelection newSelection = periodHolder.trackSelectorResult.selections.get(i);
if (newSelection != null) {
enabledRendererCount++;
}
if (rendererWasEnabledFlags[i] && (newSelection == null
|| (renderer.isCurrentStreamFinal()
&& renderer.getStream() == playingPeriodHolder.sampleStreams[i]))) {
// The renderer should be disabled before playing the next period, either because it's not
// needed to play the next period, or because we need to re-enable it as its current stream
// is final and it's not reading ahead.
if (renderer == rendererMediaClockSource) {
// Sync standaloneMediaClock so that it can take over timing responsibilities.
standaloneMediaClock.synchronize(rendererMediaClock);
rendererMediaClock = null;
rendererMediaClockSource = null;
}
ensureStopped(renderer);
renderer.disable();
}
}
playingPeriodHolder = periodHolder;
eventHandler.obtainMessage(MSG_TRACKS_CHANGED, periodHolder.trackSelectorResult).sendToTarget();
enableRenderers(rendererWasEnabledFlags, enabledRendererCount);
}
private void enableRenderers(boolean[] rendererWasEnabledFlags, int enabledRendererCount)
throws ExoPlaybackException {
enabledRenderers = new Renderer[enabledRendererCount];
enabledRendererCount = 0;
for (int i = 0; i < renderers.length; i++) {
Renderer renderer = renderers[i];
TrackSelection newSelection = playingPeriodHolder.trackSelectorResult.selections.get(i);
if (newSelection != null) {
enabledRenderers[enabledRendererCount++] = renderer;
if (renderer.getState() == Renderer.STATE_DISABLED) {
RendererConfiguration rendererConfiguration =
playingPeriodHolder.trackSelectorResult.rendererConfigurations[i];
// The renderer needs enabling with its new track selection.
boolean playing = playWhenReady && state == ExoPlayer.STATE_READY;
// Consider as joining only if the renderer was previously disabled.
boolean joining = !rendererWasEnabledFlags[i] && playing;
// Build an array of formats contained by the selection.
Format[] formats = new Format[newSelection.length()];
for (int j = 0; j < formats.length; j++) {
formats[j] = newSelection.getFormat(j);
}
// Enable the renderer.
renderer.enable(rendererConfiguration, formats, playingPeriodHolder.sampleStreams[i],
rendererPositionUs, joining, playingPeriodHolder.getRendererOffset());
MediaClock mediaClock = renderer.getMediaClock();
if (mediaClock != null) {
if (rendererMediaClock != null) {
throw ExoPlaybackException.createForUnexpected(
new IllegalStateException("Multiple renderer media clocks enabled."));
}
rendererMediaClock = mediaClock;
rendererMediaClockSource = renderer;
rendererMediaClock.setPlaybackParameters(playbackParameters);
}
// Start the renderer if playing.
if (playing) {
renderer.start();
}
}
}
}
}
/**
* Holds a {@link MediaPeriod} with information required to play it as part of a timeline.
*/
private static final class MediaPeriodHolder {
public final MediaPeriod mediaPeriod;
public final Object uid;
public final SampleStream[] sampleStreams;
public final boolean[] mayRetainStreamFlags;
public final long rendererPositionOffsetUs;
public int index;
public long startPositionUs;
public boolean isLast;
public boolean prepared;
public boolean hasEnabledTracks;
public MediaPeriodHolder next;
public boolean needsContinueLoading;
public TrackSelectorResult trackSelectorResult;
private final Renderer[] renderers;
private final RendererCapabilities[] rendererCapabilities;
private final TrackSelector trackSelector;
private final LoadControl loadControl;
private final MediaSource mediaSource;
private TrackSelectorResult periodTrackSelectorResult;
public MediaPeriodHolder(Renderer[] renderers, RendererCapabilities[] rendererCapabilities,
long rendererPositionOffsetUs, TrackSelector trackSelector, LoadControl loadControl,
MediaSource mediaSource, Object periodUid, int periodIndex, boolean isLastPeriod,
long startPositionUs) {
this.renderers = renderers;
this.rendererCapabilities = rendererCapabilities;
this.rendererPositionOffsetUs = rendererPositionOffsetUs;
this.trackSelector = trackSelector;
this.loadControl = loadControl;
this.mediaSource = mediaSource;
this.uid = Assertions.checkNotNull(periodUid);
this.index = periodIndex;
this.isLast = isLastPeriod;
this.startPositionUs = startPositionUs;
sampleStreams = new SampleStream[renderers.length];
mayRetainStreamFlags = new boolean[renderers.length];
mediaPeriod = mediaSource.createPeriod(periodIndex, loadControl.getAllocator(),
startPositionUs);
}
public long toRendererTime(long periodTimeUs) {
return periodTimeUs + getRendererOffset();
}
public long toPeriodTime(long rendererTimeUs) {
return rendererTimeUs - getRendererOffset();
}
public long getRendererOffset() {
return rendererPositionOffsetUs - startPositionUs;
}
public void setIndex(int index, boolean isLast) {
this.index = index;
this.isLast = isLast;
}
public boolean isFullyBuffered() {
return prepared
&& (!hasEnabledTracks || mediaPeriod.getBufferedPositionUs() == C.TIME_END_OF_SOURCE);
}
public void handlePrepared() throws ExoPlaybackException {
prepared = true;
selectTracks();
startPositionUs = updatePeriodTrackSelection(startPositionUs, false);
}
public boolean selectTracks() throws ExoPlaybackException {
TrackSelectorResult selectorResult = trackSelector.selectTracks(rendererCapabilities,
mediaPeriod.getTrackGroups());
if (selectorResult.isEquivalent(periodTrackSelectorResult)) {
return false;
}
trackSelectorResult = selectorResult;
return true;
}
public long updatePeriodTrackSelection(long positionUs, boolean forceRecreateStreams) {
return updatePeriodTrackSelection(positionUs, forceRecreateStreams,
new boolean[renderers.length]);
}
public long updatePeriodTrackSelection(long positionUs, boolean forceRecreateStreams,
boolean[] streamResetFlags) {
TrackSelectionArray trackSelections = trackSelectorResult.selections;
for (int i = 0; i < trackSelections.length; i++) {
mayRetainStreamFlags[i] = !forceRecreateStreams
&& trackSelectorResult.isEquivalent(periodTrackSelectorResult, i);
}
// Disable streams on the period and get new streams for updated/newly-enabled tracks.
positionUs = mediaPeriod.selectTracks(trackSelections.getAll(), mayRetainStreamFlags,
sampleStreams, streamResetFlags, positionUs);
periodTrackSelectorResult = trackSelectorResult;
// Update whether we have enabled tracks and sanity check the expected streams are non-null.
hasEnabledTracks = false;
for (int i = 0; i < sampleStreams.length; i++) {
if (sampleStreams[i] != null) {
Assertions.checkState(trackSelections.get(i) != null);
hasEnabledTracks = true;
} else {
Assertions.checkState(trackSelections.get(i) == null);
}
}
// The track selection has changed.
loadControl.onTracksSelected(renderers, trackSelectorResult.groups, trackSelections);
return positionUs;
}
public void release() {
try {
mediaSource.releasePeriod(mediaPeriod);
} catch (RuntimeException e) {
// There's nothing we can do.
Log.e(TAG, "Period release failed.", e);
}
}
}
private static final class SeekPosition {
public final Timeline timeline;
public final int windowIndex;
public final long windowPositionUs;
public SeekPosition(Timeline timeline, int windowIndex, long windowPositionUs) {
this.timeline = timeline;
this.windowIndex = windowIndex;
this.windowPositionUs = windowPositionUs;
}
}
}