How does OnAudioFinished delegate work?

Development Programming & Scripting
1

I notice that my delegate is not called untill I stop the game. On shutdown the delegate is called once. What I expect to happen is that when a sound is fully played, then this delegate is called. Am I misunderstanding OnAudioFinished or is there a mistake in my code?

At the moment the sounds (EngineAcceleration and EngineIdle) are looped over and over, which is what I want; could the be interfering with OnAudioFinished?

Header:

#pragma once

#include "CoreMinimal.h"
#include "Components/AudioComponent.h"
#include "TankAudioComponent.generated.h"

class ATank;

/**
 * 
 */
UCLASS()
class TANKIONLINEREWORK_API UTankAudioComponent : public UAudioComponent
{
	GENERATED_BODY()

public:
	UTankAudioComponent();

	void Initialize(ATank* ParentTank);
protected:
	virtual void BeginPlay() override;
	
public:
	virtual void TickComponent(float DeltaTime, ELevelTick TickType, FActorComponentTickFunction* ThisTickFunction) override;

	UFUNCTION()
	void FinishedTest();

Source:

#include "TankAudioComponent.h"

#include "Tank.h"

UTankAudioComponent::UTankAudioComponent()
{
	PrimaryComponentTick.bCanEverTick = true;
}

void UTankAudioComponent::BeginPlay()
{
	Super::BeginPlay();

	OnAudioFinished.AddDynamic(this, &UTankAudioComponent::FinishedTest);
}

void UTankAudioComponent::TickComponent(float DeltaTime, ELevelTick TickType, FActorComponentTickFunction* ThisTickFunction)
{
	Super::TickComponent(DeltaTime, TickType, ThisTickFunction);

	if (!Tank) return;
	
	if (Tank->IsDriving())
	{
		if (bIdle || !IsPlaying())
		{
			Stop();
			SetSound(EngineAcceleration);
			Play();
			bIdle = false;
		}
	}
	else
	{
		if (!bIdle || !IsPlaying())
		{
			Stop();
			SetSound(EngineIdle);
			Play();
			bIdle = true;
		}
	}
}

void UTankAudioComponent::FinishedTest()
{
	UE_LOG(LogTemp, Warning, TEXT("hi"));
}
2

Hello! OnAudioFinished delegate is called when Audio is stopped, removed from Audio list or completed (make it to the end and stop). In case of loop nothing of that happens. I search for delegate you need, but not found any at the moment

3

Thank you, looping is the issue. The acceleration actually does not have to loop, so disabling the loop on it makes the delegate work. Now I can finish the audio of the tank. :slight_smile:

4

Looping was enabled on the SoundWave assets. As looping does not fire the OnAudioFinished event, my delegates did not get called.