Fix handling of empty ad groups at non-integer cue points

Issue: google#7889
PiperOrigin-RevId: 331149688

RELEASENOTES.md

@@ -317,6 +317,8 @@
     *   Add missing notification of `VideoAdPlayerCallback.onLoaded`.
     *   Fix handling of incompatible VPAID ads
         ([#7832](https://github.com/google/ExoPlayer/issues/7832)).
+    *   Fix handling of empty ads at non-integer cue points
+        ([#7889](https://github.com/google/ExoPlayer/issues/7889)).
 *   Demo app:
     *   Replace the `extensions` variant with `decoderExtensions` and update the
         demo app use the Cronet and IMA extensions by default.

extensions/ima/src/main/java/com/google/android/exoplayer2/ext/ima/ImaAdsLoader.java

@@ -1072,12 +1072,11 @@ private void handleAdEvent(AdEvent adEvent) {
         if (DEBUG) {
           Log.d(TAG, "Fetch error for ad at " + adGroupTimeSecondsString + " seconds");
         }
-        int adGroupTimeSeconds = Integer.parseInt(adGroupTimeSecondsString);
+        double adGroupTimeSeconds = Double.parseDouble(adGroupTimeSecondsString);
         int adGroupIndex =
-            adGroupTimeSeconds == -1
+            adGroupTimeSeconds == -1.0
                 ? adPlaybackState.adGroupCount - 1
-                : Util.linearSearch(
-                    adPlaybackState.adGroupTimesUs, C.MICROS_PER_SECOND * adGroupTimeSeconds);
+                : getAdGroupIndexForCuePointTimeSeconds(adGroupTimeSeconds);
         handleAdGroupFetchError(adGroupIndex);
         break;
       case CONTENT_PAUSE_REQUESTED:
@@ -1514,20 +1513,8 @@ private int getAdGroupIndexForAdPod(AdPodInfo adPodInfo) {
       return adPlaybackState.adGroupCount - 1;
     }
 
-    // adPodInfo.podIndex may be 0-based or 1-based, so for now look up the cue point instead. We
-    // receive cue points from IMA SDK as floats. This code replicates the same calculation used to
-    // populate adGroupTimesUs (having truncated input back to float, to avoid failures if the
-    // behavior of the IMA SDK changes to provide greater precision in AdPodInfo).
-    long adPodTimeUs =
-        Math.round((double) ((float) adPodInfo.getTimeOffset()) * C.MICROS_PER_SECOND);
-    for (int adGroupIndex = 0; adGroupIndex < adPlaybackState.adGroupCount; adGroupIndex++) {
-      long adGroupTimeUs = adPlaybackState.adGroupTimesUs[adGroupIndex];
-      if (adGroupTimeUs != C.TIME_END_OF_SOURCE
-          && Math.abs(adGroupTimeUs - adPodTimeUs) < THRESHOLD_AD_MATCH_US) {
-        return adGroupIndex;
-      }
-    }
-    throw new IllegalStateException("Failed to find cue point");
+    // adPodInfo.podIndex may be 0-based or 1-based, so for now look up the cue point instead.
+    return getAdGroupIndexForCuePointTimeSeconds(adPodInfo.getTimeOffset());
   }
 
   /**
@@ -1547,6 +1534,21 @@ private int getLoadingAdGroupIndex() {
     return adGroupIndex;
   }
 
+  private int getAdGroupIndexForCuePointTimeSeconds(double cuePointTimeSeconds) {
+    // We receive initial cue points from IMA SDK as floats. This code replicates the same
+    // calculation used to populate adGroupTimesUs (having truncated input back to float, to avoid
+    // failures if the behavior of the IMA SDK changes to provide greater precision).
+    long adPodTimeUs = Math.round((float) cuePointTimeSeconds * C.MICROS_PER_SECOND);
+    for (int adGroupIndex = 0; adGroupIndex < adPlaybackState.adGroupCount; adGroupIndex++) {
+      long adGroupTimeUs = adPlaybackState.adGroupTimesUs[adGroupIndex];
+      if (adGroupTimeUs != C.TIME_END_OF_SOURCE
+          && Math.abs(adGroupTimeUs - adPodTimeUs) < THRESHOLD_AD_MATCH_US) {
+        return adGroupIndex;
+      }
+    }
+    throw new IllegalStateException("Failed to find cue point");
+  }
+
   private String getAdMediaInfoString(AdMediaInfo adMediaInfo) {
     @Nullable AdInfo adInfo = adInfoByAdMediaInfo.get(adMediaInfo);
     return "AdMediaInfo[" + adMediaInfo.getUrl() + (adInfo != null ? ", " + adInfo : "") + "]";

extensions/ima/src/test/java/com/google/android/exoplayer2/ext/ima/ImaAdsLoaderTest.java

@@ -23,6 +23,7 @@
 import static org.mockito.Mockito.doAnswer;
 import static org.mockito.Mockito.doNothing;
 import static org.mockito.Mockito.inOrder;
+import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.never;
 import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.when;
@@ -113,7 +114,6 @@ public final class ImaAdsLoaderTest {
   @Mock private ImaFactory mockImaFactory;
   @Mock private AdPodInfo mockAdPodInfo;
   @Mock private Ad mockPrerollSingleAd;
-  @Mock private AdEvent mockPostrollFetchErrorAdEvent;
 
   private ViewGroup adViewGroup;
   private AdsLoader.AdViewProvider adViewProvider;
@@ -290,8 +290,33 @@ public void playback_withPrerollAd_marksAdAsPlayed() {
                 .withAdResumePositionUs(/* adResumePositionUs= */ 0));
   }
 
+  @Test
+  public void playback_withMidrollFetchError_marksAdAsInErrorState() {
+    AdEvent mockMidrollFetchErrorAdEvent = mock(AdEvent.class);
+    when(mockMidrollFetchErrorAdEvent.getType()).thenReturn(AdEventType.AD_BREAK_FETCH_ERROR);
+    when(mockMidrollFetchErrorAdEvent.getAdData())
+        .thenReturn(ImmutableMap.of("adBreakTime", "20.5"));
+    setupPlayback(CONTENT_TIMELINE, ImmutableList.of(20.5f));
+
+    // Simulate loading an empty midroll ad.
+    imaAdsLoader.start(adsLoaderListener, adViewProvider);
+    adEventListener.onAdEvent(mockMidrollFetchErrorAdEvent);
+
+    assertThat(adsLoaderListener.adPlaybackState)
+        .isEqualTo(
+            new AdPlaybackState(/* adGroupTimesUs...= */ 20_500_000)
+                .withContentDurationUs(CONTENT_PERIOD_DURATION_US)
+                .withAdDurationsUs(new long[][] {{TEST_AD_DURATION_US}})
+                .withAdCount(/* adGroupIndex= */ 0, /* adCount= */ 1)
+                .withAdLoadError(/* adGroupIndex= */ 0, /* adIndexInAdGroup= */ 0));
+  }
+
   @Test
   public void playback_withPostrollFetchError_marksAdAsInErrorState() {
+    AdEvent mockPostrollFetchErrorAdEvent = mock(AdEvent.class);
+    when(mockPostrollFetchErrorAdEvent.getType()).thenReturn(AdEventType.AD_BREAK_FETCH_ERROR);
+    when(mockPostrollFetchErrorAdEvent.getAdData())
+        .thenReturn(ImmutableMap.of("adBreakTime", "-1"));
     setupPlayback(CONTENT_TIMELINE, ImmutableList.of(-1f));
 
     // Simulate loading an empty postroll ad.
@@ -808,10 +833,6 @@ private void setupMocks() {
     when(mockAdPodInfo.getAdPosition()).thenReturn(1);
 
     when(mockPrerollSingleAd.getAdPodInfo()).thenReturn(mockAdPodInfo);
-
-    when(mockPostrollFetchErrorAdEvent.getType()).thenReturn(AdEventType.AD_BREAK_FETCH_ERROR);
-    when(mockPostrollFetchErrorAdEvent.getAdData())
-        .thenReturn(ImmutableMap.of("adBreakTime", "-1"));
   }
 
   private static AdEvent getAdEvent(AdEventType adEventType, @Nullable Ad ad) {