Move qv4l2 and v4l2-ctl to from test to util

From: Hans Verkuil <hverkuil@xs4all.nl>



Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>

1 files changed, 1049 insertions, 0 deletions

diff --git a/v4l2-apps/util/qv4l2/qv4l2.cpp b/v4l2-apps/util/qv4l2/qv4l2.cpp
new file mode 100644
index 000000000..a4c675d48
--- /dev/null
+++ b/v4l2-apps/util/qv4l2/qv4l2.cpp
@@ -0,0 +1,1049 @@
+
+#include "qv4l2.h"
+#include "frequencies.h"
+
+#include <qimage.h>
+#include <qpixmap.h>
+#include <qtoolbar.h>
+#include <qtoolbutton.h>
+#include <qpopupmenu.h>
+#include <qmenubar.h>
+#include <qfile.h>
+#include <qfiledialog.h>
+#include <qstatusbar.h>
+#include <qmessagebox.h>
+#include <qapplication.h>
+#include <qaccel.h>
+#include <qlineedit.h>
+#include <qvalidator.h>
+#include <qlayout.h>
+#include <qvbox.h>
+#include <qhbox.h>
+#include <qlabel.h>
+#include <qslider.h>
+#include <qspinbox.h>
+#include <qcombobox.h>
+#include <qcheckbox.h>
+#include <qpushbutton.h>
+#include <qtooltip.h>
+#include <qpainter.h>
+#include <qpaintdevicemetrics.h>
+#include <qwhatsthis.h>
+
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include <errno.h>
+
+#include "fileopen.xpm"
+
+ApplicationWindow::ApplicationWindow()
+    : QMainWindow( 0, "V4L2 main window", WDestructiveClose | WGroupLeader )
+{
+    QPixmap openIcon, saveIcon;
+
+    fd = -1;
+
+    sigMapper = NULL;
+    QToolBar * fileTools = new QToolBar( this, "file operations" );
+    fileTools->setLabel( "File Operations" );
+
+    openIcon = QPixmap( fileopen );
+    QToolButton * fileOpen
+	= new QToolButton( openIcon, "Open File", QString::null,
+			   this, SLOT(choose()), fileTools, "open file" );
+
+    (void)QWhatsThis::whatsThisButton( fileTools );
+
+    const char * fileOpenText = "<p><img source=\"fileopen\"> "
+		 "Click this button to open a <em>new v4l device</em>.<br>"
+		 "You can also select the <b>Open</b> command "
+		 "from the <b>File</b> menu.</p>";
+
+    QWhatsThis::add( fileOpen, fileOpenText );
+
+    QMimeSourceFactory::defaultFactory()->setPixmap( "fileopen", openIcon );
+
+    QPopupMenu * file = new QPopupMenu( this );
+    menuBar()->insertItem( "&File", file );
+
+
+    int id;
+    id = file->insertItem( openIcon, "&Open...",
+			   this, SLOT(choose()), CTRL+Key_O );
+    file->setWhatsThis( id, fileOpenText );
+
+    file->insertSeparator();
+
+    file->insertItem( "&Close", this, SLOT(close()), CTRL+Key_W );
+
+    file->insertItem( "&Quit", qApp, SLOT( closeAllWindows() ), CTRL+Key_Q );
+
+    menuBar()->insertSeparator();
+
+    QPopupMenu * help = new QPopupMenu( this );
+    menuBar()->insertItem( "&Help", help );
+
+    help->insertItem( "&About", this, SLOT(about()), Key_F1 );
+    help->insertItem( "What's &This", this, SLOT(whatsThis()), SHIFT+Key_F1 );
+
+    statusBar()->message( "Ready", 2000 );
+
+    tabs = new QTabWidget(this);
+    tabs->setMargin(3);
+
+    //resize( 450, 600 );
+}
+
+
+ApplicationWindow::~ApplicationWindow()
+{
+	if (fd >= 0) ::close(fd);
+}
+
+
+void ApplicationWindow::setDevice(const QString &device)
+{
+	if (fd >= 0) ::close(fd);
+	while (QWidget *page = tabs->page(0)) {
+		tabs->removePage(page);
+		delete page;
+	}
+	delete tabs;
+	delete sigMapper;
+	tabs = new QTabWidget(this);
+	tabs->setMargin(3);
+	sigMapper = new QSignalMapper(this);
+	connect(sigMapper, SIGNAL(mapped(int)), this, SLOT(ctrlAction(int)));
+	ctrlMap.clear();
+	widgetMap.clear();
+	classMap.clear();
+	videoInput = NULL;
+	videoOutput = NULL;
+	audioInput = NULL;
+	audioOutput = NULL;
+	tvStandard = NULL;
+	freq = NULL;
+	freqChannel = NULL;
+	freqTable = NULL;
+
+	fd = ::open(device, O_RDONLY);
+	if (fd >= 0) {
+		addGeneralTab();
+		addTabs();
+	}
+	if (QWidget *current = tabs->currentPage()) {
+		current->show();
+	}
+	tabs->show();
+	tabs->setFocus();
+	setCentralWidget(tabs);
+}
+
+void ApplicationWindow::addGeneralTab()
+{
+	int cnt = 0;
+	QVBox *vbox = new QVBox(tabs);
+	QGrid *grid = new QGrid(4, vbox);
+	grid->setSpacing(3);
+	tabs->addTab(vbox, "General");
+
+	memset(&tuner, 0, sizeof(tuner));
+	ioctl(fd, VIDIOC_G_TUNER, &tuner);
+
+	struct v4l2_input vin;
+	memset(&vin, 0, sizeof(vin));
+	if (ioctl(fd, VIDIOC_ENUMINPUT, &vin) >= 0) {
+		QLabel *label = new QLabel("Input", grid);
+		label->setAlignment(Qt::AlignRight);
+		videoInput = new QComboBox(grid);
+		while (ioctl(fd, VIDIOC_ENUMINPUT, &vin) >= 0) {
+			videoInput->insertItem((char *)vin.name);
+			vin.index++;
+		}
+		connect(videoInput, SIGNAL(activated(int)), SLOT(inputChanged(int)));
+		updateVideoInput();
+		cnt++;
+	}
+
+	struct v4l2_output vout;
+	memset(&vout, 0, sizeof(vout));
+	if (ioctl(fd, VIDIOC_ENUMOUTPUT, &vout) >= 0) {
+		QLabel *label = new QLabel("Output", grid);
+		label->setAlignment(Qt::AlignRight);
+		videoOutput = new QComboBox(grid);
+		while (ioctl(fd, VIDIOC_ENUMOUTPUT, &vout) >= 0) {
+			videoOutput->insertItem((char *)vout.name);
+			vout.index++;
+		}
+		connect(videoOutput, SIGNAL(activated(int)), SLOT(outputChanged(int)));
+		updateVideoOutput();
+		cnt++;
+	}
+
+	struct v4l2_audio vaudio;
+	memset(&vaudio, 0, sizeof(vaudio));
+	if (ioctl(fd, VIDIOC_ENUMAUDIO, &vaudio) >= 0) {
+		QLabel *label = new QLabel("Input Audio", grid);
+		label->setAlignment(Qt::AlignRight);
+		audioInput = new QComboBox(grid);
+		vaudio.index = 0;
+		while (ioctl(fd, VIDIOC_ENUMAUDIO, &vaudio) >= 0) {
+			audioInput->insertItem((char *)vaudio.name);
+			vaudio.index++;
+		}
+		connect(audioInput, SIGNAL(activated(int)), SLOT(inputAudioChanged(int)));
+		updateAudioInput();
+		cnt++;
+	}
+
+	struct v4l2_audioout vaudioout;
+	memset(&vaudioout, 0, sizeof(vaudioout));
+	if (ioctl(fd, VIDIOC_ENUMAUDOUT, &vaudioout) >= 0) {
+		QLabel *label = new QLabel("Output Audio", grid);
+		label->setAlignment(Qt::AlignRight);
+		audioOutput = new QComboBox(grid);
+		while (ioctl(fd, VIDIOC_ENUMAUDOUT, &vaudioout) >= 0) {
+			audioOutput->insertItem((char *)vaudioout.name);
+			vaudioout.index++;
+		}
+		connect(audioOutput, SIGNAL(activated(int)), SLOT(outputAudioChanged(int)));
+		updateAudioOutput();
+		cnt++;
+	}
+
+	struct v4l2_standard vs;
+	memset(&vs, 0, sizeof(vs));
+	if (ioctl(fd, VIDIOC_ENUMSTD, &vs) >= 0) {
+		QLabel *label = new QLabel("TV Standard", grid);
+		label->setAlignment(Qt::AlignRight);
+		tvStandard = new QComboBox(grid);
+		while (ioctl(fd, VIDIOC_ENUMSTD, &vs) >= 0) {
+			tvStandard->insertItem((char *)vs.name);
+			vs.index++;
+		}
+		connect(tvStandard, SIGNAL(activated(int)), SLOT(standardChanged(int)));
+		updateStandard();
+		cnt++;
+	}
+
+	bool first = cnt & 1;
+
+	if (first) {
+		QString what;
+		QLabel *label = new QLabel("Frequency", grid);
+		label->setAlignment(Qt::AlignRight);
+		freq = new QSpinBox(tuner.rangelow, tuner.rangehigh, 1, grid);
+		QWhatsThis::add(freq, what.sprintf("Frequency\n"
+					"Low: %d\n"
+					"High: %d\n",
+					tuner.rangelow, tuner.rangehigh));
+		connect(freq, SIGNAL(valueChanged(int)), SLOT(freqChanged(int)));
+		updateFreq();
+		cnt++;
+	}
+
+	{
+		QLabel *label = new QLabel("Frequency Tables", grid);
+		label->setAlignment(Qt::AlignRight);
+		freqTable = new QComboBox(grid);
+		for (int i = 0; chanlists[i].name; i++) {
+			freqTable->insertItem(chanlists[i].name);
+		}
+		connect(freqTable, SIGNAL(activated(int)), SLOT(freqTableChanged(int)));
+
+		label = new QLabel("Channels", grid);
+		label->setAlignment(Qt::AlignRight);
+		freqChannel = new QComboBox(grid);
+		connect(freqChannel, SIGNAL(activated(int)), SLOT(freqChannelChanged(int)));
+		updateFreqChannel();
+	}
+
+	if (!first) {
+		QString what;
+		QLabel *label = new QLabel("Frequency", grid);
+		label->setAlignment(Qt::AlignRight);
+		freq = new QSpinBox(tuner.rangelow, tuner.rangehigh, 1, grid);
+		QWhatsThis::add(freq, what.sprintf("Frequency\n"
+					"Low: %d\n"
+					"High: %d\n",
+					tuner.rangelow, tuner.rangehigh));
+		connect(freq, SIGNAL(valueChanged(int)), SLOT(freqChanged(int)));
+		updateFreq();
+		cnt++;
+	}
+
+	if (cnt & 1) {
+		new QWidget(grid);
+		new QWidget(grid);
+	}
+	QWidget *stretch = new QWidget(grid);
+	stretch->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Ignored);
+}
+
+void ApplicationWindow::addTabs()
+{
+	struct v4l2_queryctrl qctrl;
+	unsigned ctrl_class;
+	unsigned i;
+	int id;
+
+	memset(&qctrl, 0, sizeof(qctrl));
+	qctrl.id = V4L2_CTRL_FLAG_NEXT_CTRL;
+	while (::ioctl(fd, VIDIOC_QUERYCTRL, &qctrl) == 0) {
+		if ((qctrl.flags & V4L2_CTRL_FLAG_DISABLED) == 0) {
+			ctrlMap[qctrl.id] = qctrl;
+			if (qctrl.type != V4L2_CTRL_TYPE_CTRL_CLASS)
+				classMap[V4L2_CTRL_ID2CLASS(qctrl.id)].push_back(qctrl.id);
+		}
+		qctrl.id |= V4L2_CTRL_FLAG_NEXT_CTRL;
+	}
+	if (qctrl.id == V4L2_CTRL_FLAG_NEXT_CTRL) {
+		strcpy((char *)qctrl.name, "User Controls");
+		qctrl.id = V4L2_CTRL_CLASS_USER | 1;
+		qctrl.type = V4L2_CTRL_TYPE_CTRL_CLASS;
+		ctrlMap[qctrl.id] = qctrl;
+		for (id = V4L2_CID_USER_BASE; id < V4L2_CID_LASTP1; id++) {
+			qctrl.id = id;
+			if (::ioctl(fd, VIDIOC_QUERYCTRL, &qctrl))
+				continue;
+			if (qctrl.flags & V4L2_CTRL_FLAG_DISABLED)
+				continue;
+			ctrlMap[qctrl.id] = qctrl;
+			classMap[V4L2_CTRL_CLASS_USER].push_back(qctrl.id);
+		}
+		for (qctrl.id = V4L2_CID_PRIVATE_BASE;
+				::ioctl(fd, VIDIOC_QUERYCTRL, &qctrl) == 0; qctrl.id++) {
+			if (qctrl.flags & V4L2_CTRL_FLAG_DISABLED)
+				continue;
+			ctrlMap[qctrl.id] = qctrl;
+			classMap[V4L2_CTRL_CLASS_USER].push_back(qctrl.id);
+		}
+	}
+
+	for (ClassMap::iterator iter = classMap.begin(); iter != classMap.end(); ++iter) {
+		ctrl_class = V4L2_CTRL_ID2CLASS(iter->second[0]);
+		id = ctrl_class | 1;
+		const struct v4l2_queryctrl &qctrl = ctrlMap[id];
+		QVBox *vbox = new QVBox(tabs);
+		QGrid *grid = new QGrid(4, vbox);
+		grid->setSpacing(3);
+		tabs->addTab(vbox, (char *)qctrl.name);
+		for (i = 0; i < iter->second.size(); i++) {
+			if (i & 1)
+				id = iter->second[(1+iter->second.size()) / 2 + i / 2];
+			else
+				id = iter->second[i / 2];
+			addCtrl(grid, ctrlMap[id]);
+		}
+		finishGrid(vbox, grid, ctrl_class, i & 1);
+	}
+}
+
+void ApplicationWindow::finishGrid(QWidget *vbox, QGrid *grid, unsigned ctrl_class, bool odd)
+{
+	if (odd) {
+		new QWidget(grid);
+		new QWidget(grid);
+	}
+	QWidget *stretch = new QWidget(grid);
+	stretch->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Ignored);
+
+	QFrame *frame = new QFrame(vbox);
+	frame->setFrameShape(QFrame::HLine);
+	frame->setFrameShadow(QFrame::Sunken);
+	frame->setMargin(3);
+
+	QHBox *hbox = new QHBox(vbox);
+	hbox->setSpacing(3);
+
+	QCheckBox *cbox = new QCheckBox("Update on change", hbox);
+	widgetMap[ctrl_class | CTRL_UPDATE_ON_CHANGE] = cbox;
+	connect(cbox, SIGNAL(clicked()), sigMapper, SLOT(map()));
+	sigMapper->setMapping(cbox, ctrl_class | CTRL_UPDATE_ON_CHANGE);
+
+	stretch = new QWidget(hbox);
+	stretch->setSizePolicy(QSizePolicy::Ignored, QSizePolicy::Fixed);
+
+	QPushButton *defBut = new QPushButton("Set Defaults", hbox);
+	widgetMap[ctrl_class | CTRL_DEFAULTS] = defBut;
+	connect(defBut, SIGNAL(clicked()), sigMapper, SLOT(map()));
+	sigMapper->setMapping(defBut, ctrl_class | CTRL_DEFAULTS);
+
+	QPushButton *refreshBut = new QPushButton("Refresh", hbox);
+	widgetMap[ctrl_class | CTRL_REFRESH] = refreshBut;
+	connect(refreshBut, SIGNAL(clicked()), sigMapper, SLOT(map()));
+	sigMapper->setMapping(refreshBut, ctrl_class | CTRL_REFRESH);
+
+	QPushButton *button = new QPushButton("Update", hbox);
+	widgetMap[ctrl_class | CTRL_UPDATE] = button;
+	connect(button, SIGNAL(clicked()), sigMapper, SLOT(map()));
+	sigMapper->setMapping(button, ctrl_class | CTRL_UPDATE);
+	connect(cbox, SIGNAL(toggled(bool)), button, SLOT(setDisabled(bool)));
+
+	cbox->setChecked(ctrl_class == V4L2_CTRL_CLASS_USER);
+
+	refresh(ctrl_class);
+}
+
+void ApplicationWindow::addCtrl(QGrid *grid, const struct v4l2_queryctrl &qctrl)
+{
+	QIntValidator *val;
+	QLineEdit *edit;
+	QString name((char *)qctrl.name);
+	QComboBox *combo;
+	struct v4l2_querymenu qmenu;
+
+	QLabel *label = new QLabel(name, grid);
+	label->setAlignment(Qt::AlignRight);
+
+	switch (qctrl.type) {
+	case V4L2_CTRL_TYPE_INTEGER:
+		if (qctrl.flags & V4L2_CTRL_FLAG_SLIDER) {
+			widgetMap[qctrl.id] =
+				new QSlider(qctrl.minimum, qctrl.maximum,
+					qctrl.step, qctrl.default_value,
+					Horizontal, grid);
+			connect(widgetMap[qctrl.id], SIGNAL(valueChanged(int)),
+				sigMapper, SLOT(map()));
+			break;
+		}
+
+		if (qctrl.maximum - qctrl.minimum <= 255) {
+			widgetMap[qctrl.id] =
+				new QSpinBox(qctrl.minimum, qctrl.maximum, 1, grid);
+			connect(widgetMap[qctrl.id], SIGNAL(valueChanged(int)),
+				sigMapper, SLOT(map()));
+			break;
+		}
+
+		val = new QIntValidator(qctrl.minimum, qctrl.maximum, grid);
+		edit = new QLineEdit(grid);
+		edit->setValidator(val);
+		widgetMap[qctrl.id] = edit;
+		connect(widgetMap[qctrl.id], SIGNAL(lostFocus()),
+				sigMapper, SLOT(map()));
+		connect(widgetMap[qctrl.id], SIGNAL(returnPressed()),
+				sigMapper, SLOT(map()));
+		break;
+
+	case V4L2_CTRL_TYPE_INTEGER64:
+		widgetMap[qctrl.id] = new QLineEdit(grid);
+		connect(widgetMap[qctrl.id], SIGNAL(lostFocus()),
+				sigMapper, SLOT(map()));
+		connect(widgetMap[qctrl.id], SIGNAL(returnPressed()),
+				sigMapper, SLOT(map()));
+		break;
+
+	case V4L2_CTRL_TYPE_BOOLEAN:
+		label->setText("");
+		widgetMap[qctrl.id] = new QCheckBox(name, grid);
+		connect(widgetMap[qctrl.id], SIGNAL(clicked()),
+				sigMapper, SLOT(map()));
+		break;
+
+	case V4L2_CTRL_TYPE_BUTTON:
+		label->setText("");
+		widgetMap[qctrl.id] = new QPushButton((char *)qctrl.name, grid);
+		connect(widgetMap[qctrl.id], SIGNAL(clicked()),
+				sigMapper, SLOT(map()));
+		break;
+
+	case V4L2_CTRL_TYPE_MENU:
+		combo = new QComboBox(grid);
+		widgetMap[qctrl.id] = combo;
+		for (int i = qctrl.minimum; i <= qctrl.maximum; i++) {
+			qmenu.id = qctrl.id;
+			qmenu.index = i;
+			if (::ioctl(fd, VIDIOC_QUERYMENU, &qmenu))
+				continue;
+			combo->insertItem((char *)qmenu.name);
+		}
+		connect(widgetMap[qctrl.id], SIGNAL(activated(int)),
+				sigMapper, SLOT(map()));
+		break;
+
+	default:
+		return;
+	}
+	sigMapper->setMapping(widgetMap[qctrl.id], qctrl.id);
+	if (qctrl.flags & (V4L2_CTRL_FLAG_READ_ONLY | V4L2_CTRL_FLAG_INACTIVE))
+		widgetMap[qctrl.id]->setDisabled(true);
+}
+
+void ApplicationWindow::ctrlAction(int id)
+{
+	unsigned ctrl_class = V4L2_CTRL_ID2CLASS(id);
+	if (ctrl_class == V4L2_CID_PRIVATE_BASE)
+		ctrl_class = V4L2_CTRL_CLASS_USER;
+	unsigned ctrl = id & 0xffff;
+	QCheckBox *cbox = static_cast<QCheckBox *>(widgetMap[ctrl_class | CTRL_UPDATE_ON_CHANGE]);
+	bool update = cbox->isChecked();
+	bool all = (ctrl == CTRL_UPDATE || (update && ctrl == CTRL_UPDATE_ON_CHANGE));
+
+	if (ctrl == CTRL_DEFAULTS) {
+		setDefaults(ctrl_class);
+		return;
+	}
+	if (ctrl == CTRL_REFRESH) {
+		refresh(ctrl_class);
+		return;
+	}
+	if (!update && !all && ctrlMap[id].type != V4L2_CTRL_TYPE_BUTTON)
+		return;
+	if (ctrl_class == V4L2_CTRL_CLASS_USER) {
+		if (!all) {
+			updateCtrl(id);
+			return;
+		}
+		for (unsigned i = 0; i < classMap[ctrl_class].size(); i++) {
+			updateCtrl(classMap[ctrl_class][i]);
+		}
+		return;
+	}
+	if (!all) {
+		updateCtrl(id);
+		return;
+	}
+	unsigned count = classMap[ctrl_class].size();
+	struct v4l2_ext_control *c = new v4l2_ext_control[count];
+	struct v4l2_ext_controls ctrls;
+	int idx = 0;
+
+	for (unsigned i = 0; i < count; i++) {
+		unsigned id = classMap[ctrl_class][i];
+
+		if (ctrlMap[id].flags & (V4L2_CTRL_FLAG_READ_ONLY | V4L2_CTRL_FLAG_INACTIVE))
+			continue;
+		c[idx].id = id;
+		if (ctrlMap[id].type == V4L2_CTRL_TYPE_INTEGER64)
+			c[idx].value64 = getVal64(id);
+		else
+			c[idx].value = getVal(id);
+		idx++;
+	}
+	memset(&ctrls, 0, sizeof(ctrls));
+	ctrls.count = idx;
+	ctrls.ctrl_class = ctrl_class;
+	ctrls.controls = c;
+	if (::ioctl(fd, VIDIOC_S_EXT_CTRLS, &ctrls)) {
+		int err = errno;
+
+		if (ctrls.error_idx >= ctrls.count) {
+			printf("error: %s\n", strerror(err));
+		}
+		else {
+			id = c[ctrls.error_idx].id;
+			printf("error %08x (%s): %s\n", id,
+					ctrlMap[id].name, strerror(err));
+		}
+	}
+	delete [] c;
+	refresh(ctrl_class);
+}
+
+long long ApplicationWindow::getVal64(unsigned id)
+{
+	const v4l2_queryctrl &qctrl = ctrlMap[id];
+	QWidget *w = widgetMap[qctrl.id];
+	long long v = 0;
+
+	switch (qctrl.type) {
+	case V4L2_CTRL_TYPE_INTEGER64:
+		v = static_cast<QLineEdit *>(w)->text().toLongLong();
+		break;
+	default:
+		break;
+	}
+	setWhat(w, id, v);
+	return v;
+}
+
+int ApplicationWindow::getVal(unsigned id)
+{
+	const v4l2_queryctrl &qctrl = ctrlMap[id];
+	QWidget *w = widgetMap[qctrl.id];
+	v4l2_querymenu qmenu;
+	int i, idx;
+	int v = 0;
+
+	switch (qctrl.type) {
+	case V4L2_CTRL_TYPE_INTEGER:
+		if (qctrl.flags & V4L2_CTRL_FLAG_SLIDER) {
+			v = static_cast<QSlider *>(w)->value();
+			break;
+		}
+
+		if (qctrl.maximum - qctrl.minimum <= 255) {
+			v = static_cast<QSpinBox *>(w)->value();
+			break;
+		}
+		v = static_cast<QLineEdit *>(w)->text().toInt();
+		break;
+
+	case V4L2_CTRL_TYPE_BOOLEAN:
+		v = static_cast<QCheckBox *>(w)->isChecked();
+		break;
+
+	case V4L2_CTRL_TYPE_MENU:
+		idx = static_cast<QComboBox *>(w)->currentItem();
+		for (i = qctrl.minimum; i <= qctrl.maximum; i++) {
+			qmenu.id = qctrl.id;
+			qmenu.index = i;
+			if (::ioctl(fd, VIDIOC_QUERYMENU, &qmenu))
+				continue;
+			if (idx-- == 0)
+				break;
+		}
+		v = i;
+		break;
+
+	default:
+		break;
+	}
+	setWhat(w, id, v);
+	return v;
+}
+
+void ApplicationWindow::updateCtrl(unsigned id)
+{
+	unsigned ctrl_class = V4L2_CTRL_ID2CLASS(id);
+	if (ctrl_class == V4L2_CID_PRIVATE_BASE)
+		ctrl_class = V4L2_CTRL_CLASS_USER;
+
+	if (ctrlMap[id].flags & (V4L2_CTRL_FLAG_READ_ONLY | V4L2_CTRL_FLAG_INACTIVE))
+		return;
+
+	if (ctrl_class == V4L2_CTRL_CLASS_USER) {
+		struct v4l2_control c;
+
+		c.id = id;
+		c.value = getVal(id);
+		if (::ioctl(fd, VIDIOC_S_CTRL, &c)) {
+			int err = errno;
+			char buf[200];
+
+			sprintf(buf, "Error %08x (%s): %s", id,
+				ctrlMap[id].name, strerror(err));
+			statusBar()->message(buf, 10000);
+		}
+		return;
+	}
+	struct v4l2_ext_control c;
+	struct v4l2_ext_controls ctrls;
+
+	memset(&c, 0, sizeof(c));
+	memset(&ctrls, 0, sizeof(ctrls));
+	c.id = id;
+	if (ctrlMap[id].type == V4L2_CTRL_TYPE_INTEGER64)
+		c.value64 = getVal64(id);
+	else
+		c.value = getVal(id);
+	ctrls.count = 1;
+	ctrls.ctrl_class = ctrl_class;
+	ctrls.controls = &c;
+	if (::ioctl(fd, VIDIOC_S_EXT_CTRLS, &ctrls)) {
+		int err = errno;
+		char buf[200];
+
+		sprintf(buf, "Error %08x (%s): %s", id,
+				ctrlMap[id].name, strerror(err));
+		statusBar()->message(buf, 10000);
+	}
+	else if (ctrlMap[id].flags & V4L2_CTRL_FLAG_UPDATE)
+		refresh(ctrl_class);
+	else {
+		if (ctrlMap[id].type == V4L2_CTRL_TYPE_INTEGER64)
+			setVal64(id, c.value64);
+		else
+			setVal(id, c.value);
+	}
+}
+
+void ApplicationWindow::refresh(unsigned ctrl_class)
+{
+	if (ctrl_class == V4L2_CTRL_CLASS_USER) {
+		for (unsigned i = 0; i < classMap[ctrl_class].size(); i++) {
+			unsigned id = classMap[ctrl_class][i];
+
+			v4l2_control c;
+
+			c.id = id;
+			if (::ioctl(fd, VIDIOC_G_CTRL, &c)) {
+				int err = errno;
+				char buf[200];
+
+				sprintf(buf, "Error %08x (%s): %s", id,
+						ctrlMap[id].name, strerror(err));
+				statusBar()->message(buf, 10000);
+			}
+			setVal(id, c.value);
+		}
+		return;
+	}
+	unsigned count = classMap[ctrl_class].size();
+	struct v4l2_ext_control *c = new v4l2_ext_control[count];
+	struct v4l2_ext_controls ctrls;
+
+	for (unsigned i = 0; i < count; i++) {
+		c[i].id = classMap[ctrl_class][i];
+	}
+	memset(&ctrls, 0, sizeof(ctrls));
+	ctrls.count = count;
+	ctrls.ctrl_class = ctrl_class;
+	ctrls.controls = c;
+	if (::ioctl(fd, VIDIOC_G_EXT_CTRLS, &ctrls)) {
+		int err = errno;
+
+		if (ctrls.error_idx >= ctrls.count) {
+			statusBar()->message(strerror(err), 10000);
+		}
+		else {
+			unsigned id = c[ctrls.error_idx].id;
+			char buf[200];
+
+			sprintf(buf, "Error %08x (%s): %s", id,
+					ctrlMap[id].name, strerror(err));
+			statusBar()->message(buf, 10000);
+		}
+	}
+	else {
+		for (unsigned i = 0; i < ctrls.count; i++) {
+			unsigned id = c[i].id;
+			if (ctrlMap[id].type == V4L2_CTRL_TYPE_INTEGER64)
+				setVal64(id, c[i].value64);
+			else
+				setVal(id, c[i].value);
+			::ioctl(fd, VIDIOC_QUERYCTRL, &ctrlMap[id]);
+			widgetMap[id]->setDisabled(ctrlMap[id].flags &
+				(V4L2_CTRL_FLAG_READ_ONLY | V4L2_CTRL_FLAG_INACTIVE));
+		}
+	}
+	delete [] c;
+}
+
+void ApplicationWindow::setWhat(QWidget *w, unsigned id, long long v)
+{
+	const v4l2_queryctrl &qctrl = ctrlMap[id];
+	QString what;
+	QString flags = getCtrlFlags(qctrl.flags);
+
+	switch (qctrl.type) {
+	case V4L2_CTRL_TYPE_INTEGER:
+		QWhatsThis::add(w, what.sprintf("Integer type control\n"
+					"Minimum: %d\n"
+					"Maximum: %d\n"
+					"Current: %d\n"
+					"Default: %d\n",
+			qctrl.minimum, qctrl.maximum, (int)v, qctrl.default_value) + flags);
+		break;
+
+	case V4L2_CTRL_TYPE_INTEGER64:
+		QWhatsThis::add(w, what.sprintf("64-bit Integer type control\n"
+					"Current: %lld\n", v) + flags);
+		break;
+
+	case V4L2_CTRL_TYPE_BUTTON:
+		QWhatsThis::add(w, what.sprintf("Button type control\n") + flags);
+		break;
+
+	case V4L2_CTRL_TYPE_BOOLEAN:
+		QWhatsThis::add(w, what.sprintf("Boolean type control\n"
+					"Current: %d\n"
+					"Default: %d\n",
+			(int)v, qctrl.default_value) + flags);
+		break;
+
+	case V4L2_CTRL_TYPE_MENU:
+		QWhatsThis::add(w, what.sprintf("Menu type control\n"
+					"Minimum: %d\n"
+					"Maximum: %d\n"
+					"Current: %d\n"
+					"Default: %d\n",
+			qctrl.minimum, qctrl.maximum, (int)v, qctrl.default_value) + flags);
+		break;
+	default:
+		break;
+	}
+}
+
+void ApplicationWindow::setVal(unsigned id, int v)
+{
+	const v4l2_queryctrl &qctrl = ctrlMap[id];
+	v4l2_querymenu qmenu;
+	QWidget *w = widgetMap[qctrl.id];
+	int i, idx;
+
+	switch (qctrl.type) {
+	case V4L2_CTRL_TYPE_INTEGER:
+		if (qctrl.flags & V4L2_CTRL_FLAG_SLIDER)
+			static_cast<QSlider *>(w)->setValue(v);
+		else if (qctrl.maximum - qctrl.minimum <= 255)
+			static_cast<QSpinBox *>(w)->setValue(v);
+		else
+			static_cast<QLineEdit *>(w)->setText(QString::number(v));
+		break;
+
+	case V4L2_CTRL_TYPE_BOOLEAN:
+		static_cast<QCheckBox *>(w)->setChecked(v);
+		break;
+
+	case V4L2_CTRL_TYPE_MENU:
+		idx = 0;
+		for (i = qctrl.minimum; i <= v; i++) {
+			qmenu.id = id;
+			qmenu.index = i;
+			if (::ioctl(fd, VIDIOC_QUERYMENU, &qmenu))
+				continue;
+			idx++;
+		}
+		static_cast<QComboBox *>(w)->setCurrentItem(idx - 1);
+		break;
+	default:
+		break;
+	}
+	setWhat(w, id, v);
+}
+
+void ApplicationWindow::setVal64(unsigned id, long long v)
+{
+	const v4l2_queryctrl &qctrl = ctrlMap[id];
+	QWidget *w = widgetMap[qctrl.id];
+
+	switch (qctrl.type) {
+	case V4L2_CTRL_TYPE_INTEGER64:
+		static_cast<QLineEdit *>(w)->setText(QString::number(v));
+		break;
+	default:
+		break;
+	}
+	setWhat(w, id, v);
+}
+
+void ApplicationWindow::setDefaults(unsigned ctrl_class)
+{
+	for (unsigned i = 0; i < classMap[ctrl_class].size(); i++) {
+		unsigned id = classMap[ctrl_class][i];
+
+		if (ctrlMap[id].type != V4L2_CTRL_TYPE_INTEGER64 &&
+		    ctrlMap[id].type != V4L2_CTRL_TYPE_BUTTON)
+			setVal(id, ctrlMap[id].default_value);
+	}
+	ctrlAction(ctrl_class | CTRL_UPDATE);
+}
+
+QString ApplicationWindow::getCtrlFlags(unsigned flags)
+{
+	QString s;
+
+	if (flags & V4L2_CTRL_FLAG_GRABBED)
+		s += "grabbed ";
+	if (flags & V4L2_CTRL_FLAG_READ_ONLY)
+		s += "readonly ";
+	if (flags & V4L2_CTRL_FLAG_UPDATE)
+		s += "update ";
+	if (flags & V4L2_CTRL_FLAG_INACTIVE)
+		s += "inactive ";
+	if (flags & V4L2_CTRL_FLAG_SLIDER)
+		s += "slider ";
+	if (s.length()) s = QString("Flags: ") + s;
+	return s;
+}
+
+void ApplicationWindow::choose()
+{
+    QString fn = QFileDialog::getOpenFileName( "/dev/v4l", QString::null,
+					       this);
+    if ( !fn.isEmpty() ) {
+	    setDevice(fn);
+    }
+    else
+	statusBar()->message( "Loading aborted", 2000 );
+}
+
+
+void ApplicationWindow::closeEvent( QCloseEvent* ce )
+{
+	ce->accept();
+}
+
+void ApplicationWindow::inputChanged(int input)
+{
+	doIoctl("Set Input", VIDIOC_S_INPUT, &input);
+	struct v4l2_audio vaudio;
+	memset(&vaudio, 0, sizeof(vaudio));
+	if (audioInput && ioctl(fd, VIDIOC_G_AUDIO, &vaudio) >= 0) {
+		audioInput->setCurrentItem(vaudio.index);
+		updateAudioInput();
+	}
+	updateVideoInput();
+}
+
+void ApplicationWindow::outputChanged(int output)
+{
+	doIoctl("Set Output", VIDIOC_S_OUTPUT, &output);
+	updateVideoOutput();
+}
+
+void ApplicationWindow::inputAudioChanged(int input)
+{
+	struct v4l2_audio vaudio;
+	memset(&vaudio, 0, sizeof(vaudio));
+	vaudio.index = input;
+	doIoctl("Set Audio Input", VIDIOC_S_AUDIO, &vaudio);
+	updateAudioInput();
+}
+
+void ApplicationWindow::outputAudioChanged(int output)
+{
+	struct v4l2_audioout vaudioout;
+	memset(&vaudioout, 0, sizeof(vaudioout));
+	vaudioout.index = output;
+	doIoctl("Set Audio Output", VIDIOC_S_AUDOUT, &vaudioout);
+	updateAudioOutput();
+}
+
+void ApplicationWindow::standardChanged(int std)
+{
+	struct v4l2_standard vs;
+	memset(&vs, 0, sizeof(vs));
+	vs.index = std;
+	ioctl(fd, VIDIOC_ENUMSTD, &vs);
+	doIoctl("Set TV Standard", VIDIOC_S_STD, &vs.id);
+	updateStandard();
+}
+
+void ApplicationWindow::freqTableChanged(int)
+{
+	updateFreqChannel();
+	freqChannelChanged(0);
+}
+
+void ApplicationWindow::freqChannelChanged(int idx)
+{
+	freq->setValue((int)(chanlists[freqTable->currentItem()].list[idx].freq / 62.5));
+}
+
+void ApplicationWindow::freqChanged(int val)
+{
+	struct v4l2_frequency f;
+
+	memset(&f, 0, sizeof(f));
+	f.type = V4L2_TUNER_ANALOG_TV;
+	f.frequency = val;
+	doIoctl("Set frequency", VIDIOC_S_FREQUENCY, &f);
+}
+
+void ApplicationWindow::updateVideoInput()
+{
+	int input;
+
+	ioctl(fd, VIDIOC_G_INPUT, &input);
+	videoInput->setCurrentItem(input);
+}
+
+void ApplicationWindow::updateVideoOutput()
+{
+	int output;
+
+	ioctl(fd, VIDIOC_G_OUTPUT, &output);
+	videoOutput->setCurrentItem(output);
+}
+
+void ApplicationWindow::updateAudioInput()
+{
+	struct v4l2_audio audio;
+	QString what;
+
+	memset(&audio, 0, sizeof(audio));
+	ioctl(fd, VIDIOC_G_AUDIO, &audio);
+	audioInput->setCurrentItem(audio.index);
+	if (audio.capability & V4L2_AUDCAP_STEREO)
+		what = "stereo input";
+	else
+		what = "mono input";
+	if (audio.capability & V4L2_AUDCAP_AVL)
+		what += ", has AVL";
+	if (audio.mode & V4L2_AUDMODE_AVL)
+		what += ", AVL is on";
+	QWhatsThis::add(audioInput, what);
+}
+
+void ApplicationWindow::updateAudioOutput()
+{
+	struct v4l2_audioout audio;
+
+	memset(&audio, 0, sizeof(audio));
+	ioctl(fd, VIDIOC_G_AUDOUT, &audio);
+	audioOutput->setCurrentItem(audio.index);
+}
+
+void ApplicationWindow::updateStandard()
+{
+	v4l2_std_id std;
+	struct v4l2_standard vs;
+	QString what;
+	ioctl(fd, VIDIOC_G_STD, &std);
+	memset(&vs, 0, sizeof(vs));
+	while (ioctl(fd, VIDIOC_ENUMSTD, &vs) != -1) {
+		if (vs.id & std) {
+			tvStandard->setCurrentItem(vs.index);
+			what.sprintf("TV Standard (0x%llX)\n"
+				"Frame period: %f (%d/%d)\n"
+				"Frame lines: %d\n", std,
+				(double)vs.frameperiod.numerator / vs.frameperiod.denominator,
+				vs.frameperiod.numerator, vs.frameperiod.denominator,
+				vs.framelines);
+			QWhatsThis::add(tvStandard, what);
+			return;
+		}
+		vs.index++;
+	}
+}
+
+void ApplicationWindow::updateFreq()
+{
+	struct v4l2_frequency f;
+
+	memset(&f, 0, sizeof(f));
+	ioctl(fd, VIDIOC_G_FREQUENCY, &f);
+	freq->setValue(f.frequency);
+}
+
+void ApplicationWindow::updateFreqChannel()
+{
+	freqChannel->clear();
+	int tbl = freqTable->currentItem();
+	struct CHANLIST *list = chanlists[tbl].list;
+	for (int i = 0; i < chanlists[tbl].count; i++)
+		freqChannel->insertItem(list[i].name);
+}
+
+bool ApplicationWindow::doIoctl(QString descr, unsigned cmd, void *arg)
+{
+	statusBar()->clear();
+	int err = ioctl(fd, cmd, arg);
+
+	if (err == -1) {
+		QString s = strerror(errno);
+		statusBar()->message(descr + ": " + s, 10000);
+	}
+	return err != -1;
+}
+
+void ApplicationWindow::about()
+{
+    QMessageBox::about( this, "V4L2 Control Panel",
+			"This program allows easy experimenting with video4linux devices.");
+}
+
+
+int main(int argc, char **argv)
+{
+    QApplication a(argc, argv);
+    ApplicationWindow *mw = new ApplicationWindow();
+    mw->setCaption( "V4L2 Control Panel" );
+    mw->setDevice("/dev/video0");
+    mw->show();
+    a.connect( &a, SIGNAL(lastWindowClosed()), &a, SLOT(quit()) );
+    return a.exec();
+}