ENH: add module flush vol predictor

jira:NONE

Signed-off-by: xun.zhang <xun.zhang@bambulab.com>
Change-Id: Ie1b0d4c443df4a26ff1b010e73d589162a0fbff7
(cherry picked from commit 475e9b34ff85cf6058ac639fde4b73264e350195)

src/libslic3r/FlushVolPredictor.hpp

@@ -0,0 +1,22 @@
+#ifndef FLUSH_VOL_PREDICTOR_HPP
+#define FLUSH_VOL_PREDICTOR_HPP
+
+#include<unordered_map>
+
+class FlushVolPredictor
+{
+public:
+    bool predict(const unsigned char src_r, const unsigned char src_g, const unsigned char src_b,
+        const unsigned char dst_r, const unsigned char dst_g, const unsigned char dst_b, float& flush);
+    static FlushVolPredictor& get_instance();
+private:
+    FlushVolPredictor(const std::string& data_file);
+    FlushVolPredictor(const FlushVolPredictor&) = delete;
+    FlushVolPredictor& operator=(const FlushVolPredictor&) = delete;
+    ~FlushVolPredictor() = default;
+private:
+    std::unordered_map<uint64_t, float> m_flush_map;
+    bool m_valid;
+};
+
+#endif