Rename OpenAL-soft "Alc" to "alc"

libs/openal-soft/alc/alu.h

@@ -0,0 +1,38 @@
+#ifndef ALU_H
+#define ALU_H
+
+#include <bitset>
+
+#include "aloptional.h"
+
+struct ALCcontext;
+struct ALCdevice;
+struct EffectSlot;
+
+enum class StereoEncoding : unsigned char;
+
+
+constexpr float GainMixMax{1000.0f}; /* +60dB */
+
+
+enum CompatFlags : uint8_t {
+    ReverseX,
+    ReverseY,
+    ReverseZ,
+
+    Count
+};
+using CompatFlagBitset = std::bitset<CompatFlags::Count>;
+
+void aluInit(CompatFlagBitset flags);
+
+/* aluInitRenderer
+ *
+ * Set up the appropriate panning method and mixing method given the device
+ * properties.
+ */
+void aluInitRenderer(ALCdevice *device, int hrtf_id, al::optional<StereoEncoding> stereomode);
+
+void aluInitEffectPanning(EffectSlot *slot, ALCcontext *context);
+
+#endif