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/*
* Copyright (C) 2018 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.mozilla.thirdparty.com.google.android.exoplayer2;
import androidx.annotation.Nullable;
import org.mozilla.thirdparty.com.google.android.exoplayer2.util.Util;
/** Abstract base {@link Player} which implements common implementation independent methods. */
public abstract class BasePlayer implements Player {
protected final Timeline.Window window;
public BasePlayer() {
window = new Timeline.Window();
}
@Override
public final boolean isPlaying() {
return getPlaybackState() == Player.STATE_READY
&& getPlayWhenReady()
&& getPlaybackSuppressionReason() == PLAYBACK_SUPPRESSION_REASON_NONE;
}
@Override
public final void seekToDefaultPosition() {
seekToDefaultPosition(getCurrentWindowIndex());
}
@Override
public final void seekToDefaultPosition(int windowIndex) {
seekTo(windowIndex, /* positionMs= */ C.TIME_UNSET);
}
@Override
public final void seekTo(long positionMs) {
seekTo(getCurrentWindowIndex(), positionMs);
}
@Override
public final boolean hasPrevious() {
return getPreviousWindowIndex() != C.INDEX_UNSET;
}
@Override
public final void previous() {
int previousWindowIndex = getPreviousWindowIndex();
if (previousWindowIndex != C.INDEX_UNSET) {
seekToDefaultPosition(previousWindowIndex);
}
}
@Override
public final boolean hasNext() {
return getNextWindowIndex() != C.INDEX_UNSET;
}
@Override
public final void next() {
int nextWindowIndex = getNextWindowIndex();
if (nextWindowIndex != C.INDEX_UNSET) {
seekToDefaultPosition(nextWindowIndex);
}
}
@Override
public final void stop() {
stop(/* reset= */ false);
}
@Override
public final int getNextWindowIndex() {
Timeline timeline = getCurrentTimeline();
return timeline.isEmpty()
? C.INDEX_UNSET
: timeline.getNextWindowIndex(
getCurrentWindowIndex(), getRepeatModeForNavigation(), getShuffleModeEnabled());
}
@Override
public final int getPreviousWindowIndex() {
Timeline timeline = getCurrentTimeline();
return timeline.isEmpty()
? C.INDEX_UNSET
: timeline.getPreviousWindowIndex(
getCurrentWindowIndex(), getRepeatModeForNavigation(), getShuffleModeEnabled());
}
@Override
@Nullable
public final Object getCurrentTag() {
Timeline timeline = getCurrentTimeline();
return timeline.isEmpty() ? null : timeline.getWindow(getCurrentWindowIndex(), window).tag;
}
@Override
@Nullable
public final Object getCurrentManifest() {
Timeline timeline = getCurrentTimeline();
return timeline.isEmpty() ? null : timeline.getWindow(getCurrentWindowIndex(), window).manifest;
}
@Override
public final int getBufferedPercentage() {
long position = getBufferedPosition();
long duration = getDuration();
return position == C.TIME_UNSET || duration == C.TIME_UNSET
? 0
: duration == 0 ? 100 : Util.constrainValue((int) ((position * 100) / duration), 0, 100);
}
@Override
public final boolean isCurrentWindowDynamic() {
Timeline timeline = getCurrentTimeline();
return !timeline.isEmpty() && timeline.getWindow(getCurrentWindowIndex(), window).isDynamic;
}
@Override
public final boolean isCurrentWindowLive() {
Timeline timeline = getCurrentTimeline();
return !timeline.isEmpty() && timeline.getWindow(getCurrentWindowIndex(), window).isLive;
}
@Override
public final boolean isCurrentWindowSeekable() {
Timeline timeline = getCurrentTimeline();
return !timeline.isEmpty() && timeline.getWindow(getCurrentWindowIndex(), window).isSeekable;
}
@Override
public final long getContentDuration() {
Timeline timeline = getCurrentTimeline();
return timeline.isEmpty()
? C.TIME_UNSET
: timeline.getWindow(getCurrentWindowIndex(), window).getDurationMs();
}
@RepeatMode
private int getRepeatModeForNavigation() {
@RepeatMode int repeatMode = getRepeatMode();
return repeatMode == REPEAT_MODE_ONE ? REPEAT_MODE_OFF : repeatMode;
}
/** Holds a listener reference. */
protected static final class ListenerHolder {
/**
* The listener on which {link #invoke} will execute {@link ListenerInvocation listener
* invocations}.
*/
public final Player.EventListener listener;
private boolean released;
public ListenerHolder(Player.EventListener listener) {
this.listener = listener;
}
/** Prevents any further {@link ListenerInvocation} to be executed on {@link #listener}. */
public void release() {
released = true;
}
/**
* Executes the given {@link ListenerInvocation} on {@link #listener}. Does nothing if {@link
* #release} has been called on this instance.
*/
public void invoke(ListenerInvocation listenerInvocation) {
if (!released) {
listenerInvocation.invokeListener(listener);
}
}
@Override
public boolean equals(@Nullable Object other) {
if (this == other) {
return true;
}
if (other == null || getClass() != other.getClass()) {
return false;
}
return listener.equals(((ListenerHolder) other).listener);
}
@Override
public int hashCode() {
return listener.hashCode();
}
}
/** Parameterized invocation of a {@link Player.EventListener} method. */
protected interface ListenerInvocation {
/** Executes the invocation on the given {@link Player.EventListener}. */
void invokeListener(Player.EventListener listener);
}
}
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