update videotest5 code.

test/videotest5/libv4l2capture.cpp

@@ -74,7 +74,7 @@ static int init_mmap ( struct cap_handle* handle )
         return -1;
     }
 
-    handle->buffers = (buffer_t*)calloc ( req.count, sizeof ( struct buffer_t ) );
+    handle->buffers = ( buffer_t* ) calloc ( req.count, sizeof ( struct buffer_t ) );
     if ( !handle->buffers )
     {
         printf ( "--- Calloc memory failed\n" );
@@ -250,7 +250,7 @@ static int init_device ( struct cap_handle* handle )
 struct cap_handle* capture_open ( struct cap_param param )
 {
     int ret;
-    struct cap_handle* handle = (struct cap_handle*)malloc ( sizeof ( struct cap_handle ) );
+    struct cap_handle* handle = ( struct cap_handle* ) malloc ( sizeof ( struct cap_handle ) );
     if ( !handle )
     {
         printf ( "--- malloc capture handle failed\n" );

test/videotest5/mainwindow.cpp

@@ -1,14 +1,32 @@
 #include "mainwindow.h"
 #include "ui_mainwindow.h"
 
-MainWindow::MainWindow(QWidget *parent) :
+MainWindow::MainWindow ( QWidget* parent ) :
-    QMainWindow(parent),
+    QMainWindow ( parent ),
-    ui(new Ui::MainWindow)
+    ui ( new Ui::MainWindow )
 {
-    ui->setupUi(this);
+    ui->setupUi ( this );
+
+    manager = new QQtV4L2VideoManager ( this );
+    connect ( manager, SIGNAL ( readyRead ( QImage ) ), this, SLOT ( slotCaptured ( QImage ) ) );
 }
 
 MainWindow::~MainWindow()
 {
     delete ui;
 }
+
+void MainWindow::on_pushButton_clicked()
+{
+    manager->startCapture();
+}
+
+void MainWindow::on_pushButton_2_clicked()
+{
+    manager->stopCapture();
+}
+
+void MainWindow::slotCaptured ( const QImage& img )
+{
+    ui->widget->setPixmap ( img );
+}

test/videotest5/mainwindow.h

@@ -2,6 +2,7 @@
 #define MAINWINDOW_H
 
 #include <QMainWindow>
+#include <qqtv4l2videomanager.h>
 
 namespace Ui {
 class MainWindow;
@@ -12,11 +13,18 @@ class MainWindow : public QMainWindow
     Q_OBJECT
 
 public:
-    explicit MainWindow(QWidget *parent = 0);
+    explicit MainWindow ( QWidget* parent = 0 );
     ~MainWindow();
 
+private slots:
+    void on_pushButton_clicked();
+    void on_pushButton_2_clicked();
+
+    void slotCaptured ( const QImage& img );
 private:
-    Ui::MainWindow *ui;
+    Ui::MainWindow* ui;
+
+    QQtV4L2VideoManager* manager;
 };
 
 #endif // MAINWINDOW_H

test/videotest5/mainwindow.ui

@@ -6,20 +6,52 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>400</width>
+    <width>176</width>
-    <height>300</height>
+    <height>328</height>
    </rect>
   </property>
   <property name="windowTitle">
    <string>videotest5</string>
   </property>
-  <widget class="QWidget" name="centralWidget"/>
+  <widget class="QWidget" name="centralWidget">
+   <layout class="QGridLayout" name="gridLayout">
+    <item row="0" column="0" colspan="2">
+     <widget class="QQtWidget" name="widget" native="true"/>
+    </item>
+    <item row="1" column="0">
+     <widget class="QPushButton" name="pushButton">
+      <property name="sizePolicy">
+       <sizepolicy hsizetype="Fixed" vsizetype="Fixed">
+        <horstretch>0</horstretch>
+        <verstretch>0</verstretch>
+       </sizepolicy>
+      </property>
+      <property name="text">
+       <string>Start</string>
+      </property>
+     </widget>
+    </item>
+    <item row="1" column="1">
+     <widget class="QPushButton" name="pushButton_2">
+      <property name="sizePolicy">
+       <sizepolicy hsizetype="Fixed" vsizetype="Fixed">
+        <horstretch>0</horstretch>
+        <verstretch>0</verstretch>
+       </sizepolicy>
+      </property>
+      <property name="text">
+       <string>Stop</string>
+      </property>
+     </widget>
+    </item>
+   </layout>
+  </widget>
   <widget class="QMenuBar" name="menuBar">
    <property name="geometry">
     <rect>
      <x>0</x>
      <y>0</y>
-     <width>400</width>
+     <width>176</width>
      <height>17</height>
     </rect>
    </property>
@@ -35,6 +67,14 @@
   <widget class="QStatusBar" name="statusBar"/>
  </widget>
  <layoutdefault spacing="6" margin="11"/>
+ <customwidgets>
+  <customwidget>
+   <class>QQtWidget</class>
+   <extends>QWidget</extends>
+   <header>qqtwidget.h</header>
+   <container>1</container>
+  </customwidget>
+ </customwidgets>
  <resources/>
  <connections/>
 </ui>

test/videotest5/qqtv4l2videomanager.cpp

@@ -1,19 +1,22 @@
 #include <qqtv4l2videomanager.h>
 
+#include <linux/videodev2.h>
 
 QQtV4L2VideoManager::QQtV4L2VideoManager ( QObject* parent ) : QObject ( parent )
 {
     handler = 0;
+    pp = 0;
+    frame = 0;
 
     mDevName = "/dev/video0";
     mSize = QSize ( 720, 480 );
-    mFormat = 0; //NV21? YUV? RGB?
+    mFormat = V4L2_PIX_FMT_NV21; //NV21? YUV? RGB?
-    mRate = 30;
+    mRate = 10;
 
-    timer = new QTimer(this);
+    timer = new QTimer ( this );
-    timer->setSingleShot(false);
+    timer->setSingleShot ( false );
-    timer->setInterval(200);
+    timer->setInterval ( 100 );
-    connect(timer, SIGNAL(timeout()), this, SLOT(slotGetCapture()));
+    connect ( timer, SIGNAL ( timeout() ), this, SLOT ( slotGetCapture() ) );
 }
 
 QQtV4L2VideoManager::~QQtV4L2VideoManager() {}
@@ -40,14 +43,16 @@ void QQtV4L2VideoManager::setVideoRate ( int rate )
 
 void QQtV4L2VideoManager::startCapture()
 {
-    if(handler)
+    if ( handler )
-        capture_close(handler);
+        capture_close ( handler );
+
     struct cap_param param;
     param.dev_name = mDevName.toLocal8Bit().data();
     param.width = mSize.width();
     param.height = mSize.height();
     param.rate = mRate;
-    handler = capture_open(param);
+    param.pixfmt = mFormat;
+    handler = capture_open ( param );
 
     pp = ( unsigned char* ) malloc ( param.width * param.height * 3 * sizeof ( char ) );
     frame = new QImage ( pp, param.width, param.height, QImage::Format_RGB888 );
@@ -56,11 +61,17 @@ void QQtV4L2VideoManager::startCapture()
 
 void QQtV4L2VideoManager::stopCapture()
 {
-    if(handler)
+    timer->stop();
-        capture_close(handler);
+
+    if ( handler )
+        capture_close ( handler );
+    if ( pp )
+        free ( pp );
+    if ( frame )
+        delete frame;
 }
 
-int QQtV4L2VideoManager::convert_yuv_to_rgb_pixel(int y, int u, int v)
+int QQtV4L2VideoManager::convert_yuv_to_rgb_pixel ( int y, int u, int v )
 {
     unsigned int pixel32 = 0;
     unsigned char* pixel = ( unsigned char* ) &pixel32;
@@ -77,7 +88,7 @@ int QQtV4L2VideoManager::convert_yuv_to_rgb_pixel(int y, int u, int v)
     return pixel32;
 }
 
-int QQtV4L2VideoManager::convert_yuv_to_rgb_buffer(unsigned char *yuv, unsigned char *rgb, unsigned int width, unsigned int height)
+int QQtV4L2VideoManager::convert_yuv_to_rgb_buffer ( unsigned char* yuv, unsigned char* rgb, unsigned int width, unsigned int height )
 {
     unsigned int in, out = 0;
     unsigned int pixel_16;
@@ -88,10 +99,10 @@ int QQtV4L2VideoManager::convert_yuv_to_rgb_buffer(unsigned char *yuv, unsigned
     for ( in = 0; in < width * height * 2; in += 4 )
     {
         pixel_16 =
-                yuv[in + 3] << 24 |
+            yuv[in + 3] << 24 |
-                               yuv[in + 2] << 16 |
+            yuv[in + 2] << 16 |
-                                              yuv[in + 1] <<  8 |
+            yuv[in + 1] <<  8 |
-                                                              yuv[in + 0];
+            yuv[in + 0];
         y0 = ( pixel_16 & 0x000000ff );
         u  = ( pixel_16 & 0x0000ff00 ) >>  8;
         y1 = ( pixel_16 & 0x00ff0000 ) >> 16;
@@ -118,7 +129,7 @@ int QQtV4L2VideoManager::convert_yuv_to_rgb_buffer(unsigned char *yuv, unsigned
 void QQtV4L2VideoManager::slotGetCapture()
 {
     int len = 0;
-    capture_get_data(handler, (void**)&p, &len);
+    capture_get_data ( handler, ( void** ) &p, &len );
-    convert_yuv_to_rgb_buffer(p, pp, mSize.width(), mSize.height());
+    convert_yuv_to_rgb_buffer ( p, pp, mSize.width(), mSize.height() );
     emit readyRead ( *frame );
 }