设备拔出 退出程序

VideoDecode.pro.user

 <?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE QtCreatorProject>
-<!-- Written by QtCreator 4.10.2, 2020-01-01T22:26:53. -->
+<!-- Written by QtCreator 4.10.2, 2020-01-02T10:53:03. -->
 <qtcreator>
  <data>
   <variable>EnvironmentId</variable>
@@ -306,8 +306,8 @@
     <value type="int" key="PE.EnvironmentAspect.Base">2</value>
     <valuelist type="QVariantList" key="PE.EnvironmentAspect.Changes"/>
     <value type="QString" key="ProjectExplorer.ProjectConfiguration.DefaultDisplayName">VideoDecode</value>
-    <value type="QString" key="ProjectExplorer.ProjectConfiguration.DisplayName">VideoDecode2</value>
-    <value type="QString" key="ProjectExplorer.ProjectConfiguration.Id">Qt4ProjectManager.Qt4RunConfiguration:C:/Users/sulin/Documents/QT_PAIR_RECEIVE2/VideoDecode.pro</value>
+    <value type="QString" key="ProjectExplorer.ProjectConfiguration.DisplayName"></value>
+    <value type="QString" key="ProjectExplorer.ProjectConfiguration.Id">Qt4ProjectManager.Qt4RunConfiguration:C:/Users/sulin/Documents/QT_PAIR_RECEIVE/VideoDecode.pro</value>
     <value type="QString" key="RunConfiguration.Arguments"></value>
     <value type="uint" key="RunConfiguration.QmlDebugServerPort">3768</value>
     <value type="bool" key="RunConfiguration.UseCppDebugger">false</value>
@@ -317,7 +317,7 @@
     <value type="bool" key="RunConfiguration.UseQmlDebugger">false</value>
     <value type="bool" key="RunConfiguration.UseQmlDebuggerAuto">true</value>
     <value type="QString" key="RunConfiguration.WorkingDirectory"></value>
-    <value type="QString" key="RunConfiguration.WorkingDirectory.default">C:/Users/sulin/Documents/QT_PAIR_RECEIVE2/bin32</value>
+    <value type="QString" key="RunConfiguration.WorkingDirectory.default">C:/Users/sulin/Documents/QT_PAIR_RECEIVE/bin32</value>
    </valuemap>
    <value type="int" key="ProjectExplorer.Target.RunConfigurationCount">1</value>
   </valuemap>

VideoDecoder/src/VideoReader/hid_thread.cpp

@@ -2,7 +2,7 @@
 
 #include <QDebug>
 #include "usb/USBOperator.h"
-
+#include<QApplication>
 #define MAX_PAYLOAD 1012
 typedef struct USB_FRAM_S{
     int head;
@@ -27,19 +27,20 @@ void hid_thread::run()
 
     int  res = hid_read(hid_fd,buffer, 2048);
     qDebug("res = %d", res);
-//    FILE *h264Fp = fopen("out.log","wb");
+    //    FILE *h264Fp = fopen("out.log","wb");
     char buff[2048];
     while(true) {
         //memset(buffer, 0, 2048);
         res = hid_read(hid_fd,buffer, 2048);
-        if (res <=0) {
-              //qDebug("res error ");
-            //cout<<"error"<<endl;
+        if (res ==-1) {
+            QApplication* app;
+            app->exit(0);
+        }
+        if(res<4){
             msleep(100);
             continue;
         }
 
-
         cout<<"youle"<<endl;
         cout<<"pUsbFram1:"<<pUsbFram1->id<<endl;
         cout<<"pUsbFram1->buff[0]"<<pUsbFram1->head<<endl;