feat(*): rewritten the project with C/C++ (#1172)

include/realesrgan_filter.h

@@ -0,0 +1,47 @@
+#ifndef REALSRGAN_FILTER_H
+#define REALSRGAN_FILTER_H
+
+#include <filesystem>
+
+#include "filter.h"
+#include "realesrgan.h"
+
+// RealesrganFilter class definition
+class RealesrganFilter : public Filter {
+   private:
+    RealESRGAN *realesrgan;
+    int gpuid;
+    bool tta_mode;
+    int scaling_factor;
+    const char *model;
+    const std::filesystem::path custom_model_param_path;
+    const std::filesystem::path custom_model_bin_path;
+    AVRational input_time_base;
+    AVRational output_time_base;
+    AVPixelFormat output_pix_fmt;
+
+   public:
+    // Constructor
+    RealesrganFilter(
+        int gpuid = 0,
+        bool tta_mode = false,
+        int scaling_factor = 4,
+        const char *model = "realesr-animevideov3",
+        const std::filesystem::path custom_model_bin_pathmodel_param_path = std::filesystem::path(),
+        const std::filesystem::path custom_model_bin_pathmodel_bin_path = std::filesystem::path()
+    );
+
+    // Destructor
+    virtual ~RealesrganFilter();
+
+    // Initializes the filter with decoder and encoder contexts
+    int init(AVCodecContext *dec_ctx, AVCodecContext *enc_ctx) override;
+
+    // Processes an input frame and returns the processed frame
+    AVFrame *process_frame(AVFrame *input_frame) override;
+
+    // Flushes any remaining frames (if necessary)
+    int flush(std::vector<AVFrame *> &processed_frames) override;
+};
+
+#endif