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Remove rounding errors of ad durations when converting from double

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#minor-release

PiperOrigin-RevId: 435360232
This commit is contained in:
bachinger 2022-03-17 16:02:00 +00:00 committed by Ian Baker
parent 7eb01e2125
commit 3cc1d06b6e
3 changed files with 53 additions and 33 deletions
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29
extensions/ima/src/main/java/com/google/android/exoplayer2/ext/ima/ImaServerSideAdInsertionMediaSource.java
View File

@ -17,6 +17,8 @@ package com.google.android.exoplayer2.ext.ima;
import static com.google.android.exoplayer2.ext.ima.ImaUtil.expandAdGroupPlaceholder;
import static com.google.android.exoplayer2.ext.ima.ImaUtil.getAdGroupAndIndexInMultiPeriodWindow;
import static com.google.android.exoplayer2.ext.ima.ImaUtil.secToMsRounded;
import static com.google.android.exoplayer2.ext.ima.ImaUtil.secToUsRounded;
import static com.google.android.exoplayer2.ext.ima.ImaUtil.splitAdPlaybackStateForPeriods;
import static com.google.android.exoplayer2.ext.ima.ImaUtil.updateAdDurationAndPropagate;
import static com.google.android.exoplayer2.ext.ima.ImaUtil.updateAdDurationInAdGroup;
@ -24,7 +26,6 @@ import static com.google.android.exoplayer2.source.ads.ServerSideAdInsertionUtil
import static com.google.android.exoplayer2.util.Assertions.checkNotNull;
import static com.google.android.exoplayer2.util.Assertions.checkState;
import static com.google.android.exoplayer2.util.Util.msToUs;
import static com.google.android.exoplayer2.util.Util.secToUs;
import static com.google.android.exoplayer2.util.Util.sum;
import static com.google.android.exoplayer2.util.Util.usToMs;
import static java.lang.Math.min;
@ -659,19 +660,29 @@ public final class ImaServerSideAdInsertionMediaSource extends CompositeMediaSou
private static AdPlaybackState setVodAdGroupPlaceholders(
List<CuePoint> cuePoints, AdPlaybackState adPlaybackState) {
// TODO(b/192231683) Use getEndTimeMs()/getStartTimeMs() after jar target was removed
for (int i = 0; i < cuePoints.size(); i++) {
CuePoint cuePoint = cuePoints.get(i);
long fromPositionUs = msToUs(secToMsRounded(cuePoint.getStartTime()));
adPlaybackState =
addAdGroupToAdPlaybackState(
adPlaybackState,
/* fromPositionUs= */ secToUs(cuePoint.getStartTime()),
/* fromPositionUs= */ fromPositionUs,
/* contentResumeOffsetUs= */ 0,
// TODO(b/192231683) Use getEndTimeMs()/getStartTimeMs() after jar target was removed
/* adDurationsUs...= */ secToUs(cuePoint.getEndTime() - cuePoint.getStartTime()));
/* adDurationsUs...= */ getAdDuration(
/* startTimeSeconds= */ cuePoint.getStartTime(),
/* endTimeSeconds= */ cuePoint.getEndTime()));
}
return adPlaybackState;
}
private static long getAdDuration(double startTimeSeconds, double endTimeSeconds) {
// startTimeSeconds and endTimeSeconds that are coming from the SDK, only have a precision of
// milliseconds so everything that is below a millisecond can be safely considered as coming
// from rounding issues.
return msToUs(secToMsRounded(endTimeSeconds - startTimeSeconds));
}
private static AdPlaybackState setVodAdInPlaceholder(Ad ad, AdPlaybackState adPlaybackState) {
AdPodInfo adPodInfo = ad.getAdPodInfo();
// Handle post rolls that have a podIndex of -1.
@ -683,9 +694,9 @@ public final class ImaServerSideAdInsertionMediaSource extends CompositeMediaSou
adPlaybackState =
expandAdGroupPlaceholder(
adGroupIndex,
/* adGroupDurationUs= */ secToUs(adPodInfo.getMaxDuration()),
/* adGroupDurationUs= */ msToUs(secToMsRounded(adPodInfo.getMaxDuration())),
adIndexInAdGroup,
/* adDurationUs= */ secToUs(ad.getDuration()),
/* adDurationUs= */ msToUs(secToMsRounded(ad.getDuration())),
/* adsInAdGroupCount= */ adPodInfo.getTotalAds(),
adPlaybackState);
} else if (adIndexInAdGroup < adGroup.count - 1) {
@ -693,7 +704,7 @@ public final class ImaServerSideAdInsertionMediaSource extends CompositeMediaSou
updateAdDurationInAdGroup(
adGroupIndex,
adIndexInAdGroup,
/* adDurationUs= */ secToUs(ad.getDuration()),
/* adDurationUs= */ msToUs(secToMsRounded(ad.getDuration())),
adPlaybackState);
}
return adPlaybackState;
@ -702,7 +713,7 @@ public final class ImaServerSideAdInsertionMediaSource extends CompositeMediaSou
private AdPlaybackState addLiveAdBreak(
Ad ad, long currentPeriodPositionUs, AdPlaybackState adPlaybackState) {
AdPodInfo adPodInfo = ad.getAdPodInfo();
long adDurationUs = secToUs(ad.getDuration());
long adDurationUs = secToUsRounded(ad.getDuration());
int adIndexInAdGroup = adPodInfo.getAdPosition() - 1;
// TODO(b/208398934) Support seeking backwards.
if (adIndexInAdGroup == 0 || adPlaybackState.adGroupCount == 1) {
@ -716,7 +727,7 @@ public final class ImaServerSideAdInsertionMediaSource extends CompositeMediaSou
new long[adCount],
adIndexInAdGroup,
adDurationUs,
secToUs(adPodInfo.getMaxDuration()));
msToUs(secToMsRounded(adPodInfo.getMaxDuration())));
adPlaybackState =
addAdGroupToAdPlaybackState(
adPlaybackState,

45
extensions/ima/src/main/java/com/google/android/exoplayer2/ext/ima/ImaUtil.java
View File

@ -54,7 +54,10 @@ import com.google.android.exoplayer2.upstream.DataSpec;
import com.google.android.exoplayer2.util.Util;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableMap;
import com.google.common.math.DoubleMath;
import java.io.IOException;
import java.math.BigDecimal;
import java.math.RoundingMode;
import java.util.Arrays;
import java.util.Collection;
import java.util.HashMap;
@ -398,17 +401,13 @@ import java.util.Set;
long elapsedAdGroupAdDurationUs = 0;
for (int j = periodIndex; j < contentTimeline.getPeriodCount(); j++) {
contentTimeline.getPeriod(j, period, /* setIds= */ true);
// TODO(b/192231683) Remove subtracted US from ad group time when we can upgrade the SDK.
// Subtract one microsecond to work around rounding errors with adGroup.timeUs.
if (totalElapsedContentDurationUs < adGroup.timeUs - 1) {
if (totalElapsedContentDurationUs < adGroup.timeUs) {
// Period starts before the ad group, so it is a content period.
adPlaybackStates.put(checkNotNull(period.uid), contentOnlyAdPlaybackState);
totalElapsedContentDurationUs += period.durationUs;
} else {
long periodStartUs = totalElapsedContentDurationUs + elapsedAdGroupAdDurationUs;
// TODO(b/192231683) Remove additional US when we can upgrade the SDK.
// Add one microsecond to work around rounding errors with adGroup.timeUs.
if (periodStartUs + period.durationUs <= adGroup.timeUs + adGroupDurationUs + 1) {
if (periodStartUs + period.durationUs <= adGroup.timeUs + adGroupDurationUs) {
// The period ends before the end of the ad group, so it is an ad period (Note: A VOD ad
// reported by the IMA SDK spans multiple periods before the LOADED event arrives).
adPlaybackStates.put(
@ -490,16 +489,12 @@ import java.util.Set;
long elapsedAdGroupAdDurationUs = 0;
for (int j = periodIndex; j < contentTimeline.getPeriodCount(); j++) {
contentTimeline.getPeriod(j, period, /* setIds= */ true);
// TODO(b/192231683) Remove subtracted US from ad group time when we can upgrade the SDK.
// Subtract one microsecond to work around rounding errors with adGroup.timeUs.
if (totalElapsedContentDurationUs < adGroup.timeUs - 1) {
if (totalElapsedContentDurationUs < adGroup.timeUs) {
// Period starts before the ad group, so it is a content period.
totalElapsedContentDurationUs += period.durationUs;
} else {
long periodStartUs = totalElapsedContentDurationUs + elapsedAdGroupAdDurationUs;
// TODO(b/192231683) Remove additional US when we can upgrade the SDK.
// Add one microsecond to work around rounding errors with adGroup.timeUs.
if (periodStartUs + period.durationUs <= adGroup.timeUs + adGroupDurationUs + 1) {
if (periodStartUs + period.durationUs <= adGroup.timeUs + adGroupDurationUs) {
// The period ends before the end of the ad group, so it is an ad period.
if (j == adPeriodIndex) {
return new Pair<>(/* adGroupIndex= */ i, adIndexInAdGroup);
@ -518,5 +513,31 @@ import java.util.Set;
throw new IllegalStateException();
}
/**
* Converts a time in seconds to the corresponding time in microseconds.
*
* <p>Fractional values are rounded to the nearest microsecond using {@link RoundingMode#HALF_UP}.
*
* @param timeSec The time in seconds.
* @return The corresponding time in microseconds.
*/
public static long secToUsRounded(double timeSec) {
return DoubleMath.roundToLong(
BigDecimal.valueOf(timeSec).scaleByPowerOfTen(6).doubleValue(), RoundingMode.HALF_UP);
}
/**
* Converts a time in seconds to the corresponding time in milliseconds.
*
* <p>Fractional values are rounded to the nearest millisecond using {@link RoundingMode#HALF_UP}.
*
* @param timeSec The time in seconds.
* @return The corresponding time in milliseconds.
*/
public static long secToMsRounded(double timeSec) {
return DoubleMath.roundToLong(
BigDecimal.valueOf(timeSec).scaleByPowerOfTen(3).doubleValue(), RoundingMode.HALF_UP);
}
private ImaUtil() {}
}

12
library/common/src/main/java/com/google/android/exoplayer2/util/Util.java
View File

@ -1141,18 +1141,6 @@ public final class Util {
return (timeMs == C.TIME_UNSET || timeMs == C.TIME_END_OF_SOURCE) ? timeMs : (timeMs * 1000);
}
/**
* Converts a time in seconds to the corresponding time in microseconds.
*
* @param timeSec The time in seconds.
* @return The corresponding time in microseconds.
*/
public static long secToUs(double timeSec) {
return BigDecimal.valueOf(timeSec)
.multiply(BigDecimal.valueOf(C.MICROS_PER_SECOND))
.longValue();
}
/**
* Parses an xs:duration attribute value, returning the parsed duration in milliseconds.
*