private void bufferToNextPosition() {
log.info("Buffering to next position: {}", nextStartingPosition);
int i = 0;
Snapshot reqSnapshot = null;
Snapshot prevSnapshot = null;
for (Snapshot snapshot : timeline.getSnapshots()) {
long offset = timeline.getOffset(snapshot.getSamplingTime());
log.debug("Snapshot {} has offset {}", i, offset);
if (offset >= nextStartingPosition) {
if (prevSnapshot == null) {
reqSnapshot = snapshot;
} else {
reqSnapshot = prevSnapshot;
}
break;
}
prevSnapshot = snapshot;
i++;
}
if (reqSnapshot == null) {
reqSnapshot = prevSnapshot;
if (reqSnapshot == null) {
log.error("Could not find snapshot for offset {}", nextStartingPosition);
setPlayState(PlayState.PAUSED);
return;
}
}
// Initialize the state at the closest possible snapshot
log.info(
"Init with snapshot with offset {}", timeline.getOffset(reqSnapshot.getSamplingTime()));
this.state = new GridState(reqSnapshot, "runState");
initState();
// Apply all events between the closet snapshot and the desired starting position
this.totalElapsed = timeline.getOffset((reqSnapshot.getSamplingTime())) + 1;
// This must be set before calling updateState for the first time after changing the position
// (i.e. totalElapsed)
this.prevElapsed = totalElapsed;
long elapsed = nextStartingPosition - totalElapsed;
if (elapsed < 0) {
log.warn(
"Negative time elapsed. Normalizing to nextStartingPosition={}", nextStartingPosition);
totalElapsed = nextStartingPosition;
elapsed = nextStartingPosition;
}
log.info("Buffering elapsed: {}", elapsed);
this.tweenChanges = false;
updateState(elapsed);
this.tweenChanges = true;
// Get ready to start playing
this.lastSliceRequestDate = new Date();
if (totalElapsed != nextStartingPosition) {
totalElapsed = nextStartingPosition;
}
setPlayState(PlayState.READY);
log.info("Buffered at totalElapsed={}", totalElapsed);
}
