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Add CuesWithTiming.endTimeUs

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In most cases this is more useful than `durationUs`.

We will keep `durationUs`, and the constructor will continue to take
`startTimeUs` and `durationUs`, to allow for use-cases where we don't
know the start time but still want to indicate a duration (this will be
used to implement CEA-608 timeout).

#minor-release

PiperOrigin-RevId: 570944449
This commit is contained in:
ibaker 2023-10-05 02:02:18 -07:00 committed by Copybara-Service
parent 89a1bb528d
commit bf7b91e57e
2 changed files with 21 additions and 0 deletions
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19
libraries/extractor/src/main/java/androidx/media3/extractor/text/CuesWithTiming.java
View File

@ -51,10 +51,29 @@ public class CuesWithTiming {
*/
public final long durationUs;
/**
* The time at which {@link #cues} should stop being shown on screen, in microseconds, or {@link
* C#TIME_UNSET} if not known.
*
* <p>The time base of this is the same as {@link #startTimeUs}.
*
* <p>If {@link Format#cueReplacementBehavior} is {@link Format#CUE_REPLACEMENT_BEHAVIOR_MERGE}
* then cues from multiple instances will be shown on screen simultaneously if their start and
* times overlap.
*
* <p>{@link C#TIME_UNSET} is only permitted if the {@link Format#cueReplacementBehavior} of the
* current track is {@link Format#CUE_REPLACEMENT_BEHAVIOR_REPLACE}.
*/
public final long endTimeUs;
/** Creates an instance. */
public CuesWithTiming(List<Cue> cues, long startTimeUs, long durationUs) {
this.cues = ImmutableList.copyOf(cues);
this.startTimeUs = startTimeUs;
this.durationUs = durationUs;
this.endTimeUs =
startTimeUs == C.TIME_UNSET || durationUs == C.TIME_UNSET
? C.TIME_UNSET
: startTimeUs + durationUs;
}
}

2
libraries/extractor/src/test/java/androidx/media3/extractor/text/CueSerializationTest.java
View File

@ -67,6 +67,7 @@ public class CueSerializationTest {
assertThat(cuesAfterDecoding.startTimeUs).isEqualTo(1000);
assertThat(cuesAfterDecoding.durationUs).isEqualTo(2000);
assertThat(cuesAfterDecoding.endTimeUs).isEqualTo(3000);
Cue cueAfterDecoding = cuesAfterDecoding.cues.get(0);
assertThat(cueAfterDecoding.text.toString()).isEqualTo(cue.text.toString());
@ -112,6 +113,7 @@ public class CueSerializationTest {
assertThat(cuesAfterDecoding.startTimeUs).isEqualTo(1000);
assertThat(cuesAfterDecoding.durationUs).isEqualTo(2000);
assertThat(cuesAfterDecoding.endTimeUs).isEqualTo(3000);
assertThat(cuesAfterDecoding.cues).hasSize(2);
Cue textCueAfterDecoding = cuesAfterDecoding.cues.get(0);