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Account for missing preroll when converting adPodIndex to adGroupIndex

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IMA always starts midrolls at index 1. So if there is no preroll ad,
the ad group index in AdPlaybackState is off by 1 all the time, and
may also lead to ArrayIndexOutOfBoundsExceptions when trying to access
the last midroll ad

Issue: androidx/media#1741
PiperOrigin-RevId: 682324368
This commit is contained in:
tonihei 2024-10-04 08:08:38 -07:00 committed by Copybara-Service
parent b5680e8a65
commit 47021c8777
2 changed files with 20 additions and 4 deletions
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3
RELEASENOTES.md
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@ -82,6 +82,9 @@
* Effect:
* Muxers:
* IMA extension:
* Fix bug where server-side inserted DAI streams without a preroll can
result in an `ArrayIndexOutOfBoundsException` when playing past the last
midroll ([#1741](https://github.com/androidx/media/issues/1741)).
* Session:
* Fix bug that caused custom commands sent from a `MediaBrowser` being
dispatched to the `MediaSessionCompat.Callback` instead of the

21
libraries/exoplayer_ima/src/main/java/androidx/media3/exoplayer/ima/ImaServerSideAdInsertionMediaSource.java
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@ -897,9 +897,7 @@ public final class ImaServerSideAdInsertionMediaSource extends CompositeMediaSou
private static AdPlaybackState setVodAdInPlaceholder(Ad ad, AdPlaybackState adPlaybackState) {
AdPodInfo adPodInfo = ad.getAdPodInfo();
// Handle post rolls that have a podIndex of -1.
int adGroupIndex =
adPodInfo.getPodIndex() == -1 ? adPlaybackState.adGroupCount - 1 : adPodInfo.getPodIndex();
int adGroupIndex = getAdGroupIndexFromAdPodInfo(adPodInfo, adPlaybackState);
AdPlaybackState.AdGroup adGroup = adPlaybackState.getAdGroup(adGroupIndex);
int adIndexInAdGroup = adPodInfo.getAdPosition() - 1;
if (adGroup.count < adPodInfo.getTotalAds()) {
@ -924,12 +922,27 @@ public final class ImaServerSideAdInsertionMediaSource extends CompositeMediaSou
private static AdPlaybackState skipAd(Ad ad, AdPlaybackState adPlaybackState) {
AdPodInfo adPodInfo = ad.getAdPodInfo();
int adGroupIndex = adPodInfo.getPodIndex();
int adGroupIndex = getAdGroupIndexFromAdPodInfo(adPodInfo, adPlaybackState);
// IMA SDK always returns index starting at 1.
int adIndexInAdGroup = adPodInfo.getAdPosition() - 1;
return adPlaybackState.withSkippedAd(adGroupIndex, adIndexInAdGroup);
}
private static int getAdGroupIndexFromAdPodInfo(
AdPodInfo adPodInfo, AdPlaybackState adPlaybackState) {
int adPodIndex = adPodInfo.getPodIndex();
if (adPodIndex == -1) {
// Post-roll
return adPlaybackState.adGroupCount - 1;
}
if (adPlaybackState.getAdGroup(0).timeUs == 0) {
// When a pre-roll exists, the index starts at zero.
return adPodIndex;
}
// Mid-rolls always start at 1.
return adPodIndex - 1;
}
private final class ComponentListener
implements AdEvent.AdEventListener, Player.Listener, AdPlaybackStateUpdater {