save image by 1 seconds

3 files changed, 32 insertions, 34 deletions

diff --git a/app/camera.cpp b/app/camera.cpp
index 8ee99c9..be49b97 100644
--- a/app/camera.cpp
+++ b/app/camera.cpp
@@ -23,6 +23,7 @@
 #include <unistd.h>
 #include <sys/ioctl.h>
 
+#define IMAGE_PATH "/home/0/CAMERA/"
 using namespace cv;
 
 Camera::Camera() {
@@ -48,7 +49,7 @@ void Camera::paint(QPainter *painter) {
 
 void Camera::enumerateCameras() {
     int maxID = 20;
-    for (int idx = 2; idx <maxID; idx++){
+    for (int idx = maxID; idx > 2; idx--){
         std::stringstream  no;
         no << "/dev/video" << idx;
         qDebug() << idx;
@@ -67,54 +68,47 @@ void Camera::enumerateCameras() {
     }
 
     camcnt = cam_arr.length();
-    cam_arr_bak = cam_arr;
 }
 
 void Camera::start(int no, int fps, QString res) {
-    try{
-        for (QVariantList::iterator iter = cam_arr_bak.begin(); iter != cam_arr_bak.end(); ++iter){
-            if (*iter == no){
-                cam_arr_bak.erase(iter);
-                break;
-            }
+    int retryCount = 0;
+    while(!capture->open(no)){
+        if(retryCount++==5){
+            qDebug()<< "Try to open camera for 5 times failed, give up.";
+            return;
+        }else{
+            qDebug()<< "open camera failed, retry " << retryCount;
+            usleep(200000);
         }
+    }
 
-        if (capture && capture->open(no)){
-            capture->set(CAP_PROP_FRAME_WIDTH, res.section("*", 0, 0).toInt());
-            capture->set(CAP_PROP_FRAME_HEIGHT, res.section("*", 1, 1).toInt());
-
-            if (fps > 0){
-                timer->start(1000/fps);
-                running = true;
-                emit isrunningChanged(running);
+    capture->set(CAP_PROP_FRAME_WIDTH, res.section("*", 0, 0).toInt());
+    capture->set(CAP_PROP_FRAME_HEIGHT, res.section("*", 1, 1).toInt());
 
-                emit camraCntChanged(cam_arr_bak);
-            }
-            camnumbackup = no;
-        }
-    }
-    catch(cv::Exception & e) {
-        qDebug() << "als-meter-demo open device error: " << e.msg.c_str();
+    if (fps > 0){
+        framePsd=fps;
+        frameCnt=0;
+        timer->start(1000/fps);
+        running = true;
+        emit isrunningChanged(running);
     }
 }
 
 void Camera::stop() {
-    cam_arr_bak.push_back(camnumbackup);
-
     if (timer->isActive())
         timer->stop();
-    if (capture && capture->isOpened())
+    if (capture->isOpened()){
+        qDebug()<< "release camera.";
         capture->release();
+    }
     image = QImage();
     update();
     running = false;
     emit isrunningChanged(running);
-
-    emit camraCntChanged(cam_arr_bak);
 }
 
 QVariantList Camera::camranum() const{
-    return cam_arr_bak;
+    return cam_arr;
 }
 
 int Camera::cameraCnt() {
@@ -134,6 +128,11 @@ void Camera::grab() {
             image = QImage((const uchar*)(frame.data), frame.cols, frame.rows, frame.step, QImage::Format_RGB888).rgbSwapped();
             image = image.scaled(this->width(), this->height(), Qt::IgnoreAspectRatio, Qt::SmoothTransformation);
             update();
+            if(frameCnt==0){
+                QString fileName = QString("%1/%2.jpg").arg(IMAGE_PATH, cvGetTickCount());
+                image.save(fileName);
+            }
+            frameCnt=(frameCnt+1)%framePsd;
         }
     }
 }
\ No newline at end of file
diff --git a/app/camera.h b/app/camera.h
index 1b85d27..e698f81 100644
--- a/app/camera.h
+++ b/app/camera.h
@@ -50,7 +50,6 @@ public:
 
 signals:
     void isrunningChanged(const bool& isrunning);
-    void camraCntChanged(const QVariantList& camcnt);
 
 public slots:
     void grab();
@@ -62,9 +61,9 @@ private:
     cv::VideoCapture* capture;
 
     QVariantList cam_arr;
-
-    int camnumbackup;
     int camcnt;
+    int frameCnt;
+    int framePsd;
 };
 
 #endif // CAMERA_H
diff --git a/app/main.qml b/app/main.qml
index 0641efe..f0b089f 100644
--- a/app/main.qml
+++ b/app/main.qml
@@ -23,8 +23,8 @@ import QtWebSockets 1.0
 

 ApplicationWindow {

     id: root

-    width: 1920

-    height: 720

+    width: 1080

+    height: 1488

 

     Camera {

         id: camdev_device