Initial commit

arm9/source/gui/input/SampledInputProvider.h

@@ -0,0 +1,34 @@
+#pragma once
+#include "InputProvider.h"
+#include "IInputSource.h"
+
+/// @brief Input provider providing input from an \see IInputSource.
+class SampledInputProvider : public InputProvider
+{
+public:
+    explicit SampledInputProvider(const IInputSource* inputSource)
+        : _inputSource(inputSource), _inputBufferReadPtr(0), _inputBufferWritePtr(0) { }
+
+    void Update() override;
+
+    /// @brief Samples the input source.
+    void Sample()
+    {
+        _inputBuffer[_inputBufferWritePtr] = _inputSource->Sample();
+        _inputBufferWritePtr = (_inputBufferWritePtr + 1) & 3;
+    }
+
+    void Reset() override
+    {
+        InputProvider::Reset();
+        _inputBufferReadPtr = 0;
+        _inputBufferWritePtr = 0;
+    }
+
+private:
+    const IInputSource* _inputSource;
+
+    InputKey _inputBuffer[4];
+    u8 _inputBufferReadPtr;
+    u8 _inputBufferWritePtr;
+};