Custom Playable Behaviour with Notification timing in relation to full timeline

Hi,

I'm new to Timeline so this might be basic but I can't find a way to get the notification timings to be relative to the Timeline when I fire them from a playableBehaviour

PlayableAsset

Code (CSharp):

1. public class RhythmBeatAsset :  PlayableAsset
2. {
3.     protected RhythmBeatBehaviour m_RhythmBeatBehaviour;
4.  
5.     public override Playable CreatePlayable (PlayableGraph graph, GameObject owner)
6.     {
7.         var playable = ScriptPlayable<RhythmBeatBehaviour>.Create(graph);
8.  
9.         m_RhythmBeatBehaviour = playable.GetBehaviour();
10.  
11.         return playable;  
12.     }
13. }

PlayableBehaviour

Code (CSharp):

1. public class RhythmBeatBehaviour : TimeNotificationBehaviour
2. {
3.     protected double m_PreviousTime;
4.     protected float m_Bpm;
5.     protected RhythmBeatReceiver m_RhythmBeatReceiver;
6.    
7.     public override void OnGraphStart(Playable playable)
8.     {
9.         m_PreviousTime = 0;
10.     }
11.  
12.     public override void ProcessFrame(Playable playable, FrameData info, object playerData)
13.     {
14.         m_RhythmBeatReceiver = playerData as RhythmBeatReceiver;
15.         if (m_RhythmBeatReceiver != null) {
16.             m_Bpm = m_RhythmBeatReceiver.Bpm;
17.         }
18.  
19.         if (m_PreviousTime < playable.GetTime())
20.         {
21.             info.output.PushNotification(playable, new MyNotification());
22.             m_PreviousTime += 60f / m_Bpm;
23.         }
24.     }
25. }

Notification Receiver

Code (CSharp):

1. public class RhythmBeatReceiver : MonoBehaviour, INotificationReceiver
2. {
3.     [SerializeField] protected float m_Bpm = 120;
4.     [SerializeField] protected bool m_DebugLogTimings;
5.  
6.     public float Bpm => m_Bpm;
7.  
8.     public void OnNotify(Playable origin, INotification notification, object context)
9.     {
10.         if (notification != null && m_DebugLogTimings)
11.         {
12.             double time = origin.IsValid() ? origin.GetTime() : 0.0;
13.             Debug.LogFormat("Rhythm Beat Received notification of type {0} at time {1}", notification.GetType(), time);
14.         }
15.     }
16. }

When I place Notification markers on the track the receiver logs the timings in relation to the full timeline they. When I place a clip the timings of the notification are relative to that clip. That's when I call "origin.GetTime()". From what I understand the Playbale "origin" is a clip within the timeline, and markers have a clip of their own for all markers in a track.

So I'm wondering how I'm supposed to get the relative timings? Something like clipStartTime+origin.GetTime() would do the trick but I'm not sure where I can get the clipStartTime from the receiver.
The other thing I wanted to know is how do I push a notification on start and on stop of a clip?

I have a ton of other questions but I'll ask them at another time

 

I forgot to ask Is there a way to pass the timings of markers to the notification. There is always a tiny delay in "GetTime()" because that's when the receiver receives the notification. I want to know if I can somehow get the exact time where the notification was supposed to be push. This way I could get the difference (receivedTime-exactTime) and then I can do adjustment using that difference

 

That's great Thank you!

Last question can I get the clip from "origin"?
Currently my work around is to save to clip to the playableAsset when the graph is built and then I pass the clip through the INotification parameter. It causes some slight problems in the editor preview, but for my purpose I made it play only by checking Application.IsPlaying.

The other thing is that OnBehaviorPause is called when I build the graph and when I destroy the graph. I get an error because one of the instances I reference in the OnBehaviourPause is destroyed with the graph. Do you have any advice on how I could check if the graph is destroyed or is being destroyed?

I greatly appreciate the help