Update OpenAL-soft to 1.21.1

libs/openal-soft/core/ambdec.h

@@ -0,0 +1,52 @@
+#ifndef CORE_AMBDEC_H
+#define CORE_AMBDEC_H
+
+#include <array>
+#include <memory>
+#include <string>
+
+#include "aloptional.h"
+#include "core/ambidefs.h"
+
+/* Helpers to read .ambdec configuration files. */
+
+enum class AmbDecScale {
+    N3D,
+    SN3D,
+    FuMa,
+};
+struct AmbDecConf {
+    std::string Description;
+    int Version{0}; /* Must be 3 */
+
+    unsigned int ChanMask{0u};
+    unsigned int FreqBands{0u}; /* Must be 1 or 2 */
+    AmbDecScale CoeffScale{};
+
+    float XOverFreq{0.0f};
+    float XOverRatio{0.0f};
+
+    struct SpeakerConf {
+        std::string Name;
+        float Distance{0.0f};
+        float Azimuth{0.0f};
+        float Elevation{0.0f};
+        std::string Connection;
+    };
+    size_t NumSpeakers{0};
+    std::unique_ptr<SpeakerConf[]> Speakers;
+
+    using CoeffArray = std::array<float,MaxAmbiChannels>;
+    std::unique_ptr<CoeffArray[]> Matrix;
+
+    /* Unused when FreqBands == 1 */
+    float LFOrderGain[MaxAmbiOrder+1]{};
+    CoeffArray *LFMatrix;
+
+    float HFOrderGain[MaxAmbiOrder+1]{};
+    CoeffArray *HFMatrix;
+
+    al::optional<std::string> load(const char *fname) noexcept;
+};
+
+#endif /* CORE_AMBDEC_H */