// Copyright Epic Games, Inc. All Rights Reserved.

#pragma once

#include "CoreMinimal.h"
#include "Delegates/Delegate.h"
#include "Misc/Build.h"
#include "Templates/SharedPointer.h"

#define UE_MEDIAUTILS_DEVELOPMENT_DELEGATE (UE_BUILD_DEVELOPMENT || UE_BUILD_DEBUG)

class IMediaTextureSample;
class UMediaTexture;

class FMediaDelegates
{
public:
	using TSharedMediaTextureSample = TSharedPtr<IMediaTextureSample, ESPMode::ThreadSafe>;

	DECLARE_MULTICAST_DELEGATE_TwoParams(FOnSampleDiscardedDelegate, const UMediaTexture* /*Owner*/, TSharedMediaTextureSample /*FlushedSample*/);
	DECLARE_MULTICAST_DELEGATE_ThreeParams(FOnPreSampleRenderDelegate, const UMediaTexture* /*Owner*/, bool /*UseSample*/, TSharedMediaTextureSample /*SampleToRender*/);


#if UE_MEDIAUTILS_DEVELOPMENT_DELEGATE

	/**
	 * Callback when a sample is discarded from the MediaTexture renderer.
	 * Used to debug the samples queue. Only available in a development build.
	 * @see UE_MEDIAUTILS_DEVELOPMENT_DELEGATE
	 */
	static MEDIAUTILS_API FOnSampleDiscardedDelegate OnSampleDiscarded_RenderThread;

	/**
	 * Callback when a sample is going to be used to update the MediaTexture.
	 * Used to debug the samples queue. Only available in a development build.
	 * @see UE_MEDIAUTILS_DEVELOPMENT_DELEGATE
	 */
	static MEDIAUTILS_API FOnPreSampleRenderDelegate OnPreSampleRender_RenderThread;

#endif //UE_MEDIAUTILS_DEVELOPMENT_DELEGATE
};