Unreal Engine MusicPlayerActor.h

#pragma once

#include "GameFramework/Actor.h"
#include "Components/AudioComponent.h"
#include "AudioDecompress.h"
#include "AudioDevice.h"
#include "ActiveSound.h"
#include "Audio.h"
#include "Developer/TargetPlatform/Public/Interfaces/IAudioFormat.h"

#include "MusicPlayerActor.generated.h"

/**
*
*/
UCLASS()
class AMusicPlayerActor : public AActor
{
    GENERATED_UCLASS_BODY()

    //* Audio file name (OggVorbis) with path
    UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = MusicPlayer)
        FString FileName;

    //* Play box collider
    TSubobjectPtr<UBoxComponent> Box_play;
    TSubobjectPtr<UPointLightComponent> light_play;
    //* Stop box collider
    TSubobjectPtr<UBoxComponent> Box_stop;
    TSubobjectPtr<UPointLightComponent> light_stop;
    //* Pause box collider
    TSubobjectPtr<UBoxComponent> Box_pause;
    TSubobjectPtr<UPointLightComponent> light_pause;

    //* manually constructed SoundWave
    USoundWave* sw;
    //* Game component used to play audio
    TSubobjectPtr<UAudioComponent> ac;
    //* loaded song file (binary, encoded)
    TArray < uint8 > rawFile;

    //* active sound object
    FActiveSound* activeSound;
    FAudioDevice* device;
    //* instance of USoundWave currently playing
    FWaveInstance* sw_instance;
    //* current sound audio source object
    FSoundSource* audioSource;

    //* If true the song was successfully loaded
    bool loaded;
    //* If true the song was manually paused by the user
    bool isPaused;

    UFUNCTION()
        void TriggerEnter(class AActor* OtherActor, class UPrimitiveComponent* OtherComp, int32 OtherBodyIndex);
    UFUNCTION()
        void TriggerExit(class AActor* OtherActor, class UPrimitiveComponent* OtherComp, int32 OtherBodyIndex);
    UFUNCTION()
        void TriggerEnterPause(class AActor* OtherActor, class UPrimitiveComponent* OtherComp, int32 OtherBodyIndex);
    UFUNCTION()
        void TriggerExitPause(class AActor* OtherActor, class UPrimitiveComponent* OtherComp, int32 OtherBodyIndex);
    UFUNCTION()
        void TriggerEnterStop(class AActor* OtherActor, class UPrimitiveComponent* OtherComp, int32 OtherBodyIndex);
    UFUNCTION()
        void TriggerExitStop(class AActor* OtherActor, class UPrimitiveComponent* OtherComp, int32 OtherBodyIndex);

    UFUNCTION(BlueprintCallable, Category = "Player")
        void Load(FString NewFileName);
    UFUNCTION(BlueprintCallable, Category = "Player")
        void Stop();
    UFUNCTION(BlueprintCallable, Category = "Player")
        void Play();
    UFUNCTION(BlueprintCallable, Category = "Player")
        void Pause();

private:

    /**
    * Print on screen Debug message.
    */
    void Debug(FString msg);

    /**
    * Read .ogg header file and refresh USoundWave metadata.
    * @param sw     wave to put metadata
    * @param rawFile    pointer to src file in memory
    * @return 0 if everything is ok
    *         1 if couldn't read metadata.
    */
    int fillSoundWaveInfo(USoundWave* sw, TArray<uint8>* rawFile);

    /**
    * Tries to find out FSoundSource object associated to the USoundWave.
    * @param sw     wave, search key
    * @return 0 if wave found and correctly set
    *        -1 if error: sound device not set
    *        -2 if error: sound wave not found
    */
    int findSource(USoundWave* sw);

};