Update OpenAL-soft to 1.21.1

libs/openal-soft/utils/sofa-support.h

@@ -0,0 +1,30 @@
+#ifndef UTILS_SOFA_SUPPORT_H
+#define UTILS_SOFA_SUPPORT_H
+
+#include <cstddef>
+#include <memory>
+#include <vector>
+
+#include "mysofa.h"
+
+
+struct MySofaDeleter {
+    void operator()(MYSOFA_HRTF *sofa) { mysofa_free(sofa); }
+};
+using MySofaHrtfPtr = std::unique_ptr<MYSOFA_HRTF,MySofaDeleter>;
+
+// Per-field measurement info.
+struct SofaField {
+    using uint = unsigned int;
+
+    double mDistance{0.0};
+    uint mEvCount{0u};
+    uint mEvStart{0u};
+    std::vector<uint> mAzCounts;
+};
+
+const char *SofaErrorStr(int err);
+
+std::vector<SofaField> GetCompatibleLayout(const size_t m, const float *xyzs);
+
+#endif /* UTILS_SOFA_SUPPORT_H */