Add non-streaming speech recognition examples for MFC (#212)

mfc-examples/NonStreamingSpeechRecognition/NonStreamingSpeechRecognitionDlg.h

@@ -0,0 +1,73 @@
+
+// NonStreamingSpeechRecognitionDlg.h : header file
+//
+
+#pragma once
+
+#include <string>
+#include <vector>
+
+#include "portaudio.h"
+#include "sherpa-onnx/c-api/c-api.h"
+
+class Microphone {
+ public:
+  Microphone();
+  ~Microphone();
+};
+
+// CNonStreamingSpeechRecognitionDlg dialog
+class CNonStreamingSpeechRecognitionDlg : public CDialogEx {
+  // Construction
+ public:
+  CNonStreamingSpeechRecognitionDlg(
+      CWnd *pParent = nullptr);  // standard constructor
+  ~CNonStreamingSpeechRecognitionDlg();
+
+// Dialog Data
+#ifdef AFX_DESIGN_TIME
+  enum { IDD = IDD_NONSTREAMINGSPEECHRECOGNITION_DIALOG };
+#endif
+
+ protected:
+  virtual void DoDataExchange(CDataExchange *pDX);  // DDX/DDV support
+
+  // Implementation
+ protected:
+  HICON m_hIcon;
+
+  // Generated message map functions
+  virtual BOOL OnInitDialog();
+  afx_msg void OnPaint();
+  afx_msg HCURSOR OnQueryDragIcon();
+  DECLARE_MESSAGE_MAP()
+ public:
+  afx_msg void OnBnClickedOk();
+  int RunThread();
+
+ private:
+  Microphone mic_;
+
+  SherpaOnnxOfflineRecognizer *recognizer_ = nullptr;
+  SherpaOnnxOfflineRecognizerConfig config_;
+
+  PaStream *pa_stream_ = nullptr;
+  CButton my_btn_;
+  CEdit my_text_;
+  std::vector<std::string> results_;
+
+ public:
+  bool started_ = false;
+  std::vector<float> samples_;
+
+ private:
+  void AppendTextToEditCtrl(const std::string &s);
+  void AppendLineToMultilineEditCtrl(const std::string &s);
+  void InitMicrophone();
+
+  bool Exists(const std::string &filename);
+  void InitRecognizer();
+
+  void InitParaformer();
+  void ShowInitRecognizerHelpMessage();
+};