AudioSystem.h

#pragma once
 
#include "AudioComponent.h"
 
#include "Systems/ComponentSystem.h"
 
#include <xaudio2.h>
 
namespace Cogs
{
  namespace Core
  {
    enum class AudioState
    {
      None = 0,
      StartPlaying,
      Playing,
      StopPlaying,
      Stopped
    };
 
    struct AudioData
    {
      IXAudio2SourceVoice * sourceVoice = nullptr;
      IXAudio2SubmixVoice * submixVoice = nullptr;
 
      AudioState state = AudioState::None;
 
      glm::vec3 prevListener;
      glm::vec3 previousPosition;
    };
 
    struct AudioDevice;
 
    class AudioSystem : public ComponentSystemWithDataPool<AudioComponent, AudioData>
    {
    public:
      AudioSystem(Memory::Allocator * allocator, SizeType size);
      ~AudioSystem();
 
      void initialize(Context * context) override;
      void update(Context * context) override;
      void cleanup(Context * context) override;
 
      void destroyComponent(ComponentHandle handle) override;
 
      void setAudioListener(ComponentHandle handle);
 
    private:
      std::unique_ptr<AudioDevice> subSystem;
      ComponentHandle listenerHandle = ComponentHandle::Empty();
      double prevTime = 0;
    };
  }
}