1 files changed, 58 insertions, 0 deletions
diff --git a/al/listener.h b/al/listener.h
new file mode 100644
index 00000000..a71db9f8
--- /dev/null
+++ b/al/listener.h
@@ -0,0 +1,58 @@
+#ifndef AL_LISTENER_H
+#define AL_LISTENER_H
+
+#include <array>
+#include <atomic>
+
+#include "AL/al.h"
+#include "AL/alc.h"
+
+#include "vecmat.h"
+
+enum class DistanceModel;
+
+
+struct ALlistenerProps {
+    std::array<ALfloat,3> Position;
+    std::array<ALfloat,3> Velocity;
+    std::array<ALfloat,3> OrientAt;
+    std::array<ALfloat,3> OrientUp;
+    ALfloat Gain;
+
+    std::atomic<ALlistenerProps*> next;
+};
+
+struct ALlistener {
+    std::array<ALfloat,3> Position{{0.0f, 0.0f, 0.0f}};
+    std::array<ALfloat,3> Velocity{{0.0f, 0.0f, 0.0f}};
+    std::array<ALfloat,3> OrientAt{{0.0f, 0.0f, -1.0f}};
+    std::array<ALfloat,3> OrientUp{{0.0f, 1.0f, 0.0f}};
+    ALfloat Gain{1.0f};
+
+    std::atomic_flag PropsClean;
+
+    /* Pointer to the most recent property values that are awaiting an update.
+     */
+    std::atomic<ALlistenerProps*> Update{nullptr};
+
+    struct {
+        alu::Matrix Matrix;
+        alu::Vector Velocity;
+
+        ALfloat Gain;
+        ALfloat MetersPerUnit;
+
+        ALfloat DopplerFactor;
+        ALfloat SpeedOfSound; /* in units per sec! */
+        ALfloat ReverbSpeedOfSound; /* in meters per sec! */
+
+        ALboolean SourceDistanceModel;
+        DistanceModel mDistanceModel;
+    } Params;
+
+    ALlistener() { PropsClean.test_and_set(std::memory_order_relaxed); }
+};
+
+void UpdateListenerProps(ALCcontext *context);
+
+#endif