select video device via a popup menu

From: Mauro Carvalho Chehab <mchehab@redhat.com>

Seeking for a video device at /dev is sometimes hard, since not all
distros create a /dev/v4l dir. Instead of opening a file, be more
user-friendly, by just displaying the valid files.

Priority: normal

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

2 files changed, 53 insertions, 8 deletions

diff --git a/v4l2-apps/util/qv4l2/qv4l2.cpp b/v4l2-apps/util/qv4l2/qv4l2.cpp
index a93608af2..eb1506531 100644
--- a/v4l2-apps/util/qv4l2/qv4l2.cpp
+++ b/v4l2-apps/util/qv4l2/qv4l2.cpp
@@ -31,6 +31,7 @@
 #include <fcntl.h>
 #include <sys/ioctl.h>
 #include <errno.h>
+#include <dirent.h>
 
 #include "fileopen.xpm"
 
@@ -41,6 +42,7 @@ ApplicationWindow::ApplicationWindow()
 
     fd = -1;
 
+    videoDevice = NULL;
     sigMapper = NULL;
     QToolBar * fileTools = new QToolBar( this, "file operations" );
     fileTools->setLabel( "File Operations" );
@@ -129,17 +131,57 @@ void ApplicationWindow::setDevice(const QString &device)
 	setCentralWidget(tabs);
 }
 
-void ApplicationWindow::choose()
+void ApplicationWindow::selectdev(int index)
+{
+	setDevice(videoDevice->text(index));
+}
+
+void ApplicationWindow::add_dirVideoDevice(char *dirname)
 {
-    QString fn = QFileDialog::getOpenFileName( "/dev/v4l", QString::null,
-					       this);
-    if ( !fn.isEmpty() ) {
-	    setDevice(fn);
-    }
-    else
-	statusBar()->message( "Loading aborted", 2000 );
+	DIR		*dir;
+	struct dirent	*entry;
+	char		*vid = "video";
+	char		*rad = "radio";
+	char		*vbi = "vbi";
+	char		name[512], *p;
+
+	dir = opendir(dirname);
+	if (!dir)
+		return;
+
+	strcpy(name, dirname);
+	strcat(name, "/");
+	p = name + strlen(name);
+
+	entry = readdir(dir);
+	while (entry) {
+		if (!strncmp(entry->d_name, vid, strlen(vid)) ||
+		    !strncmp(entry->d_name, rad, strlen(rad)) ||
+		    !strncmp(entry->d_name, vbi, strlen(vbi))) {
+			strcpy(p, entry->d_name);
+
+			videoDevice->insertItem(name);
+		}
+		entry = readdir(dir);
+	}
+	closedir(dir);
 }
 
+void ApplicationWindow::choose()
+{
+	if (videoDevice)
+		delete videoDevice;
+
+	videoDevice = new QPopupMenu(this);
+
+	add_dirVideoDevice("/dev");
+	add_dirVideoDevice("/dev/v4l");
+
+	connect(videoDevice, SIGNAL(activated(int)), this, SLOT(selectdev(int)));
+
+	videoDevice->show();
+	videoDevice->setFocus();
+}
 
 void ApplicationWindow::closeEvent( QCloseEvent* ce )
 {
diff --git a/v4l2-apps/util/qv4l2/qv4l2.h b/v4l2-apps/util/qv4l2/qv4l2.h
index 1a0a8e15d..805c5d612 100644
--- a/v4l2-apps/util/qv4l2/qv4l2.h
+++ b/v4l2-apps/util/qv4l2/qv4l2.h
@@ -59,12 +59,14 @@ protected:
     void closeEvent( QCloseEvent* );
 
 private slots:
+    void selectdev(int);
     void choose();
     void ctrlAction(int);
 
     void about();
 
 private:
+    void add_dirVideoDevice(char *dirname);
     void addTabs();
     void finishGrid(QWidget *vbox, QGrid *grid, unsigned ctrl_class, bool odd);
     void addCtrl(QGrid *grid, const struct v4l2_queryctrl &qctrl);
@@ -88,6 +90,7 @@ private:
     QString filename;
     QSignalMapper *sigMapper;
     QTabWidget *tabs;
+    QPopupMenu *videoDevice;
     int fd;
     CtrlMap ctrlMap;
     WidgetMap widgetMap;