add webrtc capture demo

test/src/webrtcdemo/webrtcdemo.cpp

@@ -0,0 +1,46 @@
+/*
+ * @Author: your name
+ * @Date: 2021-10-11 10:01:51
+ * @LastEditTime: 2021-10-12 15:29:19
+ * @LastEditors: Please set LastEditors
+ * @Description: In User Settings Edit
+ * @FilePath: \test_algorithm\webrtcdemo.cpp
+ */
+
+#include <iostream>
+ 
+#ifdef _WIN32
+#include <Windows.h>
+#pragma comment(lib,"d3d11.lib") 
+#endif
+
+#define WEBRTC_WIN
+
+#include "modules/desktop_capture/desktop_capturer.h"
+#include "modules/desktop_capture/cropping_window_capturer.h"
+#include "modules/desktop_capture/desktop_capture_options.h"
+#include "modules/desktop_capture/screen_capturer_helper.h"
+#include "modules/desktop_capture/desktop_frame.h"
+
+#include <iostream>
+
+class CaptureCallBack :public webrtc::DesktopCapturer::Callback{
+    virtual void OnCaptureResult(webrtc::DesktopCapturer::Result ret,
+        std::unique_ptr<webrtc::DesktopFrame> frame){
+        if(ret == webrtc::DesktopCapturer::Result::SUCCESS){
+            std::cout << "capture frame "<< frame.get()->size().width() << " "
+            << frame.get()->size().height()<<"\r\n";
+        }
+    }
+};
+
+int main(int argc,char *argv[]){
+    auto screen_capture_ = std::move(webrtc::DesktopCapturer::CreateScreenCapturer(webrtc::DesktopCaptureOptions::CreateDefault()));
+    screen_capture_->Start(new CaptureCallBack());
+    while(true){
+        std::cout<<"hello world\r\n";
+        screen_capture_->CaptureFrame();
+        Sleep(100);
+    }
+    return 0;
+}