From e179bf0a12e80eb41041469bc04ba1fbcffe11e8 Mon Sep 17 00:00:00 2001
From: Chris Robinson <chris.kcat@gmail.com>
Date: Sat, 12 Dec 2020 14:58:09 -0800
Subject: Move the mixer functions to core

---
 core/mixer/hrtfdefs.h | 52 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 52 insertions(+)
 create mode 100644 core/mixer/hrtfdefs.h

(limited to 'core/mixer/hrtfdefs.h')

diff --git a/core/mixer/hrtfdefs.h b/core/mixer/hrtfdefs.h
new file mode 100644
index 00000000..623e6ec3
--- /dev/null
+++ b/core/mixer/hrtfdefs.h
@@ -0,0 +1,52 @@
+#ifndef CORE_MIXER_HRTFDEFS_H
+#define CORE_MIXER_HRTFDEFS_H
+
+#include <array>
+
+#include "core/ambidefs.h"
+#include "core/bufferline.h"
+#include "core/filters/splitter.h"
+
+
+#define HRTF_HISTORY_BITS   6
+#define HRTF_HISTORY_LENGTH (1<<HRTF_HISTORY_BITS)
+#define HRTF_HISTORY_MASK   (HRTF_HISTORY_LENGTH-1)
+
+#define HRIR_BITS   7
+#define HRIR_LENGTH (1<<HRIR_BITS)
+#define HRIR_MASK   (HRIR_LENGTH-1)
+
+#define MIN_IR_LENGTH 8
+
+#define HRTF_DIRECT_DELAY 192
+
+using float2 = std::array<float,2>;
+using HrirArray = std::array<float2,HRIR_LENGTH>;
+using ubyte = unsigned char;
+using ubyte2 = std::array<ubyte,2>;
+using ushort = unsigned short;
+using uint = unsigned int;
+
+
+struct MixHrtfFilter {
+    const HrirArray *Coeffs;
+    std::array<uint,2> Delay;
+    float Gain;
+    float GainStep;
+};
+
+struct HrtfFilter {
+    alignas(16) HrirArray Coeffs;
+    std::array<uint,2> Delay;
+    float Gain;
+};
+
+
+struct HrtfChannelState {
+    std::array<float,HRTF_DIRECT_DELAY> mDelay{};
+    BandSplitter mSplitter;
+    float mHfScale{};
+    alignas(16) HrirArray mCoeffs{};
+};
+
+#endif /* CORE_MIXER_HRTFDEFS_H */
-- 
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