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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.mozilla.thirdparty.com.google.android.exoplayer2.source;
import androidx.annotation.Nullable;
import org.mozilla.thirdparty.com.google.android.exoplayer2.C;
import org.mozilla.thirdparty.com.google.android.exoplayer2.Timeline;
import org.mozilla.thirdparty.com.google.android.exoplayer2.util.Assertions;
/**
* A {@link Timeline} consisting of a single period and static window.
*/
public final class SinglePeriodTimeline extends Timeline {
private static final Object UID = new Object();
private final long presentationStartTimeMs;
private final long windowStartTimeMs;
private final long periodDurationUs;
private final long windowDurationUs;
private final long windowPositionInPeriodUs;
private final long windowDefaultStartPositionUs;
private final boolean isSeekable;
private final boolean isDynamic;
private final boolean isLive;
@Nullable private final Object tag;
@Nullable private final Object manifest;
/**
* Creates a timeline containing a single period and a window that spans it.
*
* @param durationUs The duration of the period, in microseconds.
* @param isSeekable Whether seeking is supported within the period.
* @param isDynamic Whether the window may change when the timeline is updated.
* @param isLive Whether the window is live.
*/
public SinglePeriodTimeline(
long durationUs, boolean isSeekable, boolean isDynamic, boolean isLive) {
this(durationUs, isSeekable, isDynamic, isLive, /* manifest= */ null, /* tag= */ null);
}
/**
* Creates a timeline containing a single period and a window that spans it.
*
* @param durationUs The duration of the period, in microseconds.
* @param isSeekable Whether seeking is supported within the period.
* @param isDynamic Whether the window may change when the timeline is updated.
* @param isLive Whether the window is live.
* @param manifest The manifest. May be {@code null}.
* @param tag A tag used for {@link Window#tag}.
*/
public SinglePeriodTimeline(
long durationUs,
boolean isSeekable,
boolean isDynamic,
boolean isLive,
@Nullable Object manifest,
@Nullable Object tag) {
this(
durationUs,
durationUs,
/* windowPositionInPeriodUs= */ 0,
/* windowDefaultStartPositionUs= */ 0,
isSeekable,
isDynamic,
isLive,
manifest,
tag);
}
/**
* Creates a timeline with one period, and a window of known duration starting at a specified
* position in the period.
*
* @param periodDurationUs The duration of the period in microseconds.
* @param windowDurationUs The duration of the window in microseconds.
* @param windowPositionInPeriodUs The position of the start of the window in the period, in
* microseconds.
* @param windowDefaultStartPositionUs The default position relative to the start of the window at
* which to begin playback, in microseconds.
* @param isSeekable Whether seeking is supported within the window.
* @param isDynamic Whether the window may change when the timeline is updated.
* @param isLive Whether the window is live.
* @param manifest The manifest. May be (@code null}.
* @param tag A tag used for {@link Timeline.Window#tag}.
*/
public SinglePeriodTimeline(
long periodDurationUs,
long windowDurationUs,
long windowPositionInPeriodUs,
long windowDefaultStartPositionUs,
boolean isSeekable,
boolean isDynamic,
boolean isLive,
@Nullable Object manifest,
@Nullable Object tag) {
this(
/* presentationStartTimeMs= */ C.TIME_UNSET,
/* windowStartTimeMs= */ C.TIME_UNSET,
periodDurationUs,
windowDurationUs,
windowPositionInPeriodUs,
windowDefaultStartPositionUs,
isSeekable,
isDynamic,
isLive,
manifest,
tag);
}
/**
* Creates a timeline with one period, and a window of known duration starting at a specified
* position in the period.
*
* @param presentationStartTimeMs The start time of the presentation in milliseconds since the
* epoch.
* @param windowStartTimeMs The window's start time in milliseconds since the epoch.
* @param periodDurationUs The duration of the period in microseconds.
* @param windowDurationUs The duration of the window in microseconds.
* @param windowPositionInPeriodUs The position of the start of the window in the period, in
* microseconds.
* @param windowDefaultStartPositionUs The default position relative to the start of the window at
* which to begin playback, in microseconds.
* @param isSeekable Whether seeking is supported within the window.
* @param isDynamic Whether the window may change when the timeline is updated.
* @param isLive Whether the window is live.
* @param manifest The manifest. May be {@code null}.
* @param tag A tag used for {@link Timeline.Window#tag}.
*/
public SinglePeriodTimeline(
long presentationStartTimeMs,
long windowStartTimeMs,
long periodDurationUs,
long windowDurationUs,
long windowPositionInPeriodUs,
long windowDefaultStartPositionUs,
boolean isSeekable,
boolean isDynamic,
boolean isLive,
@Nullable Object manifest,
@Nullable Object tag) {
this.presentationStartTimeMs = presentationStartTimeMs;
this.windowStartTimeMs = windowStartTimeMs;
this.periodDurationUs = periodDurationUs;
this.windowDurationUs = windowDurationUs;
this.windowPositionInPeriodUs = windowPositionInPeriodUs;
this.windowDefaultStartPositionUs = windowDefaultStartPositionUs;
this.isSeekable = isSeekable;
this.isDynamic = isDynamic;
this.isLive = isLive;
this.manifest = manifest;
this.tag = tag;
}
@Override
public int getWindowCount() {
return 1;
}
@Override
public Window getWindow(int windowIndex, Window window, long defaultPositionProjectionUs) {
Assertions.checkIndex(windowIndex, 0, 1);
long windowDefaultStartPositionUs = this.windowDefaultStartPositionUs;
if (isDynamic && defaultPositionProjectionUs != 0) {
if (windowDurationUs == C.TIME_UNSET) {
// Don't allow projection into a window that has an unknown duration.
windowDefaultStartPositionUs = C.TIME_UNSET;
} else {
windowDefaultStartPositionUs += defaultPositionProjectionUs;
if (windowDefaultStartPositionUs > windowDurationUs) {
// The projection takes us beyond the end of the window.
windowDefaultStartPositionUs = C.TIME_UNSET;
}
}
}
return window.set(
Window.SINGLE_WINDOW_UID,
tag,
manifest,
presentationStartTimeMs,
windowStartTimeMs,
isSeekable,
isDynamic,
isLive,
windowDefaultStartPositionUs,
windowDurationUs,
0,
0,
windowPositionInPeriodUs);
}
@Override
public int getPeriodCount() {
return 1;
}
@Override
public Period getPeriod(int periodIndex, Period period, boolean setIds) {
Assertions.checkIndex(periodIndex, 0, 1);
Object uid = setIds ? UID : null;
return period.set(/* id= */ null, uid, 0, periodDurationUs, -windowPositionInPeriodUs);
}
@Override
public int getIndexOfPeriod(Object uid) {
return UID.equals(uid) ? 0 : C.INDEX_UNSET;
}
@Override
public Object getUidOfPeriod(int periodIndex) {
Assertions.checkIndex(periodIndex, 0, 1);
return UID;
}
}
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