CoWatchingHandler

abstract void onCoWatchingStateChanged(CoWatchingState state)

Applies a co-watching state update from another participant in the meeting.

Note: This will not be called in response to local changes.

Implementation example:

// Handle transition to new video.
if (!newState.mediaId().equals(this.videoPlayer.videoUrl)) {
  this.videoPlayer.loadVideo(newState.mediaId());
}

// Only adjust the local video playout if it is sufficiently diverged from the timestamp in the
// applied update.
if (newState
        .mediaPlayoutPosition()
        .minus(this.videoPlayer.videoTimestamp)
        .compareTo(Duration.ofMillis(500))
    > 0) {
  this.videoPlayer.seek(newState.mediaPlayoutPosition());
}

// Update pause state if necessary.
if (newState.playbackState().equals(PLAY) && this.videoPlayer.isPaused) {
  this.videoPlayer.unpause();
} else if (newState.playbackState().equals(PAUSE) && !this.videoPlayer.isPaused) {
  this.videoPlayer.pause();
}

abstract Optional<QueriedCoWatchingState> onStateQuery()

Retrieves the current state of the local co-watching activity.

This will be called regularly so it should be written to be performant (e.g. <100ms).

Implementation example:

QueriedCoWatchingState myCurrentPlaybackState = QueriedCoWatchingState
    .of(/* mediaPlayoutPosition= *{/} this.videoPlayer.videoTimestamp);
return Optional.of(myCurrentPlaybackState);