hmd2: initialize reprojection and virtual headset field of view

Inspired by https://github.com/KytyPS5/KytyPS5/pull/607

Co-authored-by: BlackCAT <52720489+psnwd@users.noreply.github.com>

src/libs/hmd2.h

@@ -0,0 +1,24 @@
+#ifndef EMULATOR_SRC_LIBS_HMD2_H_
+#define EMULATOR_SRC_LIBS_HMD2_H_
+
+#include <atomic>
+#include <cstdint>
+
+namespace Libs::Hmd2 {
+
+inline constexpr uint32_t PANEL_WIDTH  = 4000;
+inline constexpr uint32_t PANEL_HEIGHT = 2040;
+inline constexpr uint64_t OUTPUT_MODE_89_91HZ  = 0x2000c;
+inline constexpr uint64_t OUTPUT_MODE_119_88HZ = 0x2000f;
+inline constexpr int32_t ERROR_REPROJECTION_NOT_INITIALIZED = -1972240373; // 0x8a72000b
+
+struct ReprojectionState {
+	std::atomic<uint64_t> output_mode {0};
+	std::atomic<uint32_t> timing_us {3000};
+};
+
+[[nodiscard]] ReprojectionState* GetReprojectionState();
+
+} // namespace Libs::Hmd2
+
+#endif // EMULATOR_SRC_LIBS_HMD2_H_