[Other]Fastdeploy supports set_model_buffer function for encrypted model (#930)

* Update keypointdetection result docs

* Update im.copy() to im in examples

* Update new Api, fastdeploy::vision::Visualize to fastdeploy::vision

* Update SwapBackgroundSegmentation && SwapBackgroundMatting to SwapBackground

* Update README_CN.md

* Update README_CN.md

* Support set_model_buffer function

fastdeploy/runtime.h

@@ -88,6 +88,20 @@ struct FASTDEPLOY_DECL RuntimeOption {
                     const std::string& params_path = "",
                     const ModelFormat& format = ModelFormat::PADDLE);
 
+  /** \brief Specify the memory buffer of model and parameter. Used when model and params are loaded directly from memory
+   *
+   * \param[in] model_buffer The memory buffer of model
+   * \param[in] model_buffer_size The size of the model data
+   * \param[in] params_buffer The memory buffer of the combined parameters file
+   * \param[in] params_buffer_size The size of the combined parameters data
+   * \param[in] format Format of the loaded model
+   */
+  void SetModelBuffer(const char * model_buffer,
+                      size_t model_buffer_size,
+                      const char * params_buffer,
+                      size_t params_buffer_size,
+                      const ModelFormat& format = ModelFormat::PADDLE);
+
   /// Use cpu to inference, the runtime will inference on CPU by default
   void UseCpu();
 
@@ -431,6 +445,12 @@ struct FASTDEPLOY_DECL RuntimeOption {
   std::string params_file = "";  // Path of parameters file, can be empty
   // format of input model
   ModelFormat model_format = ModelFormat::AUTOREC;
+
+  std::string model_buffer_ = "";
+  std::string params_buffer_ = "";
+  size_t model_buffer_size_ = 0;
+  size_t params_buffer_size_ = 0;
+  bool model_from_memory_ = false;
 };
 
 /*! @brief Runtime object used to inference the loaded model on different devices