1 files changed, 53 insertions, 0 deletions
diff --git a/core/mixer/hrtfdefs.h b/core/mixer/hrtfdefs.h
new file mode 100644
index 00000000..3c903ed8
--- /dev/null
+++ b/core/mixer/hrtfdefs.h
@@ -0,0 +1,53 @@
+#ifndef CORE_MIXER_HRTFDEFS_H
+#define CORE_MIXER_HRTFDEFS_H
+
+#include <array>
+
+#include "alspan.h"
+#include "core/ambidefs.h"
+#include "core/bufferline.h"
+#include "core/filters/splitter.h"
+
+
+using float2 = std::array<float,2>;
+using ubyte = unsigned char;
+using ubyte2 = std::array<ubyte,2>;
+using ushort = unsigned short;
+using uint = unsigned int;
+using uint2 = std::array<uint,2>;
+
+constexpr uint HrtfHistoryBits{6};
+constexpr uint HrtfHistoryLength{1 << HrtfHistoryBits};
+constexpr uint HrtfHistoryMask{HrtfHistoryLength - 1};
+
+constexpr uint HrirBits{7};
+constexpr uint HrirLength{1 << HrirBits};
+constexpr uint HrirMask{HrirLength - 1};
+
+constexpr uint MinIrLength{8};
+
+using HrirArray = std::array<float2,HrirLength>;
+using HrirSpan = al::span<float2,HrirLength>;
+using ConstHrirSpan = al::span<const float2,HrirLength>;
+
+struct MixHrtfFilter {
+    const ConstHrirSpan Coeffs;
+    uint2 Delay;
+    float Gain;
+    float GainStep;
+};
+
+struct HrtfFilter {
+    alignas(16) HrirArray Coeffs;
+    uint2 Delay;
+    float Gain;
+};
+
+
+struct HrtfChannelState {
+    BandSplitter mSplitter;
+    float mHfScale{};
+    alignas(16) HrirArray mCoeffs{};
+};
+
+#endif /* CORE_MIXER_HRTFDEFS_H */