// Called every frame that the timeline is evaluated. This is called prior to
// PrepareFrame on any of its input playables.
public override void PrepareFrame(Playable playable, FrameData info)
{
// Searches for clips that are in the 'preload' area and prepares them for playback
var timelineTime = playable.GetGraph().GetRootPlayable(0).GetTime();
for (int i = 0; i < playable.GetInputCount(); i++)
{
if (playable.GetInput(i).GetPlayableType() != typeof(VideoPlayableBehaviour))
{
continue;
}
if (playable.GetInputWeight(i) <= 0.0f)
{
ScriptPlayable <VideoPlayableBehaviour> scriptPlayable = (ScriptPlayable <VideoPlayableBehaviour>)playable.GetInput(i);
VideoPlayableBehaviour videoPlayableBehaviour = scriptPlayable.GetBehaviour();
double preloadTime = Math.Max(0.0, videoPlayableBehaviour.preloadTime);
double clipStart = videoPlayableBehaviour.startTime;
if (timelineTime > clipStart - preloadTime && timelineTime <= clipStart)
{
videoPlayableBehaviour.PrepareVideo();
}
}
}
}
