From 9e9940046499703ecbcf6df2df5762729e4efd27 Mon Sep 17 00:00:00 2001
From: Junrou Nishida <homuler@users.noreply.github.com>
Date: Thu, 19 May 2022 14:43:16 +0900
Subject: [PATCH] fix(plugin): OutputStream#TryGetNext throws if it's not
 started (#581)

---
 .../Runtime/Scripts/Unity/OutputStream.cs                   | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Packages/com.github.homuler.mediapipe/Runtime/Scripts/Unity/OutputStream.cs b/Packages/com.github.homuler.mediapipe/Runtime/Scripts/Unity/OutputStream.cs
index 4294d5e9c..a984fb296 100644
--- a/Packages/com.github.homuler.mediapipe/Runtime/Scripts/Unity/OutputStream.cs
+++ b/Packages/com.github.homuler.mediapipe/Runtime/Scripts/Unity/OutputStream.cs
@@ -282,6 +282,12 @@ public bool ResetTimestampIfTimedOut(long timestampMicrosec, long timeoutMicrose
 
     protected bool CanCallNext(bool allowBlock)
     {
+      if (_poller == null)
+      {
+        Logger.LogWarning("OutputStreamPoller is not initialized. Call StartPolling before running the CalculatorGraph");
+        return false;
+      }
+
       if (canTestPresence)
       {
         if (!allowBlock)