#ifndef NW4R_SND_VOICE_MANAGER_H
#define NW4R_SND_VOICE_MANAGER_H
#include "nw4r/snd/snd_Voice.h"
#include "nw4r/types_nw4r.h"


namespace nw4r {
namespace snd {
namespace detail {

class VoiceManager {
public:
    static const int VOICE_MAX = AX_VOICE_MAX;
    static const int WORK_SIZE_MAX = VOICE_MAX * sizeof(Voice);

public:
    static VoiceManager &GetInstance();

    u32 GetRequiredMemSize();

    void Setup(void *pBuffer, u32 size);
    void Shutdown();
    void StopAllVoices();

    Voice *AllocVoice(int channels, int voices, int priority, Voice::VoiceCallback pCallback, void *pCallbackArg);
    void FreeVoice(Voice *pVoice);

    void UpdateAllVoices();
    void NotifyVoiceUpdate();
    void ChangeVoicePriority(Voice *pVoice);
    void UpdateAllVoicesSync(u32 syncFlag);

    const VoiceList &GetVoiceList() const {
        return mPrioVoiceList;
    }

private:
    VoiceManager();

    void AppendVoiceList(Voice *pVoice);
    void RemoveVoiceList(Voice *pVoice);

    void UpdateEachVoicePriority(const VoiceList::Iterator &rBegin, const VoiceList::Iterator &rEnd);

    int DropLowestPriorityVoice(int priority);

private:
    bool mInitialized;        // at 0x0
    VoiceList mPrioVoiceList; // at 0x4
    VoiceList mFreeVoiceList; // at 0x10
};

} // namespace detail
} // namespace snd
} // namespace nw4r

#endif