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#ifndef AL_FILTER_H
#define AL_FILTER_H
#include <array>
#include <cstdint>
#include <string_view>
#include <variant>
#include "AL/al.h"
#include "AL/alc.h"
#include "AL/alext.h"
#include "almalloc.h"
#include "alnumeric.h"
inline constexpr float LowPassFreqRef{5000.0f};
inline constexpr float HighPassFreqRef{250.0f};
template<typename T>
struct FilterTable {
static void setParami(struct ALfilter*, ALenum, int);
static void setParamiv(struct ALfilter*, ALenum, const int*);
static void setParamf(struct ALfilter*, ALenum, float);
static void setParamfv(struct ALfilter*, ALenum, const float*);
static void getParami(const struct ALfilter*, ALenum, int*);
static void getParamiv(const struct ALfilter*, ALenum, int*);
static void getParamf(const struct ALfilter*, ALenum, float*);
static void getParamfv(const struct ALfilter*, ALenum, float*);
};
struct NullFilterTable : public FilterTable<NullFilterTable> { };
struct LowpassFilterTable : public FilterTable<LowpassFilterTable> { };
struct HighpassFilterTable : public FilterTable<HighpassFilterTable> { };
struct BandpassFilterTable : public FilterTable<BandpassFilterTable> { };
struct ALfilter {
ALenum type{AL_FILTER_NULL};
float Gain{1.0f};
float GainHF{1.0f};
float HFReference{LowPassFreqRef};
float GainLF{1.0f};
float LFReference{HighPassFreqRef};
using TableTypes = std::variant<NullFilterTable,LowpassFilterTable,HighpassFilterTable,
BandpassFilterTable>;
TableTypes mTypeVariant;
/* Self ID */
ALuint id{0};
static void SetName(ALCcontext *context, ALuint id, std::string_view name);
DISABLE_ALLOC
};
struct FilterSubList {
uint64_t FreeMask{~0_u64};
gsl::owner<std::array<ALfilter,64>*> Filters{nullptr};
FilterSubList() noexcept = default;
FilterSubList(const FilterSubList&) = delete;
FilterSubList(FilterSubList&& rhs) noexcept : FreeMask{rhs.FreeMask}, Filters{rhs.Filters}
{ rhs.FreeMask = ~0_u64; rhs.Filters = nullptr; }
~FilterSubList();
FilterSubList& operator=(const FilterSubList&) = delete;
FilterSubList& operator=(FilterSubList&& rhs) noexcept
{ std::swap(FreeMask, rhs.FreeMask); std::swap(Filters, rhs.Filters); return *this; }
};
#endif
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