Render timing

apps/RenderCadenceCompositor/app/RenderCadenceApp.h

@@ -87,29 +87,13 @@ public:
 		}
 		mRuntimeLayers.StartStartupBuild(mConfig.runtimeShaderId);
 
-		Log("app", "Waiting for rendered warmup frames.");
-		if (!mFrameExchange.WaitForCompletedDepth(mConfig.warmupCompletedFrames, mConfig.warmupTimeout))
+		if (!BuildSettledOutputReserve(error))
 		{
-			error = "Timed out waiting for rendered warmup frames.";
 			LogError("app", error);
 			Stop();
 			return false;
 		}
 
-		if (mConfig.startupSettle > std::chrono::milliseconds::zero())
-		{
-			Log("app", "Settling render cadence before DeckLink output for " + std::to_string(mConfig.startupSettle.count()) + " ms.");
-			std::this_thread::sleep_for(mConfig.startupSettle);
-			Log("app", "Waiting for rendered reserve after startup settle.");
-			if (!mFrameExchange.WaitForCompletedDepth(mConfig.warmupCompletedFrames, mConfig.warmupTimeout))
-			{
-				error = "Timed out waiting for rendered reserve after startup settle.";
-				LogError("app", error);
-				Stop();
-				return false;
-			}
-		}
-
 		StartOptionalVideoOutput();
 		mTelemetryHealth.Start(mFrameExchange, mOutput, mOutputThread, mRenderThread);
 		StartHttpServer();
@@ -181,6 +165,24 @@ private:
 		Log("app", mVideoOutputStatus);
 	}
 
+	bool BuildSettledOutputReserve(std::string& error)
+	{
+		const auto reserveTimeout = mConfig.warmupTimeout + mConfig.startupSettle + mConfig.warmupTimeout;
+		Log("app",
+			"Building settled output reserve: waiting for " + std::to_string(mConfig.warmupCompletedFrames) +
+			" completed frame(s) to remain ready for " + std::to_string(mConfig.startupSettle.count()) + " ms.");
+		if (mFrameExchange.WaitForStableCompletedDepth(
+			mConfig.warmupCompletedFrames,
+			mConfig.startupSettle,
+			reserveTimeout))
+		{
+			return true;
+		}
+
+		error = "Timed out waiting for settled output reserve.";
+		return false;
+	}
+
 	void DisableVideoOutput(const std::string& reason)
 	{
 		mOutputThread.Stop();