AudioZone.h

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#pragma once
#include "common/Export.h"
 
 
#include "common/Result.h"
 
#include <cstdint>
#include <vector>
 
namespace eve::audio {
class Source;
 
struct AudioZoneItem { float volume=1.f, fadeInTime=5.f, fadeOutTime=5.f, duration=0.f; };
enum class AudioZonePhase : std::uint8_t { Active, BecomingInactive, Inactive };
class EVENGINE_API_BACKENDS AudioZoneProfile {
public:
    float x=0.f,y=0.f,z=0.f,radius=30.f,minimumBreakTime=5.f,maximumBreakTime=10.f,deactivationTime=10.f;
    bool global=false;
    [[nodiscard]] Result<int> addItem(const AudioZoneItem& item);
    int itemCount() const noexcept { return static_cast<int>(items_.size()); }
    const AudioZoneItem* itemAt(int index) const noexcept;
private:
    std::vector<AudioZoneItem> items_;
};
struct AudioZoneState {
    AudioZonePhase phase=AudioZonePhase::Inactive;
    int selectedTrack=-1;
    bool playing=false;
    float trackStarted=0.f,fadeInEnds=0.f,fadeOutBegins=0.f,fadeOutEnds=0.f,nextTrackStarts=0.f,deactivateAt=0.f;
};
struct AudioZoneOutput { bool play=false,stop=false; int trackIndex=-1; float volume=0.f; };
[[nodiscard]] EVENGINE_API_BACKENDS Result<AudioZoneOutput> evaluateAudioZone(const AudioZoneProfile& profile,
                                                                              AudioZoneState& state, float now,
                                                                              float playerX, float playerY,
                                                                              float playerZ, float masterVolume,
                                                                              std::uint32_t seed);
[[nodiscard]] EVENGINE_API_BACKENDS Result<void> applyAudioZoneOutput(Source* source, const AudioZoneOutput& output);
}