core/mixer/hrtfdefs.h

   1 #ifndef CORE_MIXER_HRTFDEFS_H
   2 #define CORE_MIXER_HRTFDEFS_H
   3
   4 #include <array>
   5
   6 #include "alspan.h"
   7 #include "core/ambidefs.h"
   8 #include "core/bufferline.h"
   9 #include "core/filters/splitter.h"
  10
  11
  12 using float2 = std::array<float,2>;
  13 using ubyte = unsigned char;
  14 using ubyte2 = std::array<ubyte,2>;
  15 using ushort = unsigned short;
  16 using uint = unsigned int;
  17 using uint2 = std::array<uint,2>;
  18
  19 constexpr uint HrtfHistoryBits{6};
  20 constexpr uint HrtfHistoryLength{1 << HrtfHistoryBits};
  21 constexpr uint HrtfHistoryMask{HrtfHistoryLength - 1};
  22
  23 constexpr uint HrirBits{7};
  24 constexpr uint HrirLength{1 << HrirBits};
  25 constexpr uint HrirMask{HrirLength - 1};
  26
  27 constexpr uint MinIrLength{8};
  28
  29 constexpr uint HrtfDirectDelay{256};
  30
  31 using HrirArray = std::array<float2,HrirLength>;
  32 using HrirSpan = al::span<float2,HrirLength>;
  33 using ConstHrirSpan = al::span<const float2,HrirLength>;
  34
  35 struct MixHrtfFilter {
  36     const ConstHrirSpan Coeffs;
  37     uint2 Delay;
  38     float Gain;
  39     float GainStep;
  40 };
  41
  42 struct HrtfFilter {
  43     alignas(16) HrirArray Coeffs;
  44     uint2 Delay;
  45     float Gain;
  46 };
  47
  48
  49 struct HrtfChannelState {
  50     std::array<float,HrtfDirectDelay> mDelay{};
  51     BandSplitter mSplitter;
  52     float mHfScale{};
  53     alignas(16) HrirArray mCoeffs{};
  54 };
  55
  56 #endif /* CORE_MIXER_HRTFDEFS_H */