/* qv4l2: a control panel controlling v4l2 devices.
 *
 * Copyright (C) 2006 Hans Verkuil <hverkuil@xs4all.nl>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */


#include "general-tab.h"
#include "../libv4l2util/libv4l2util.h"

#include <QSpinBox>
#include <QSlider>
#include <QComboBox>
#include <QPushButton>
#include <QToolButton>
#include <QLineEdit>
#include <QDoubleValidator>

#include <math.h>
#include <stdio.h>
#include <errno.h>
#include <QRegExp>

bool GeneralTab::m_fullAudioName = false;

enum audioDeviceAdd {
	AUDIO_ADD_NO,
	AUDIO_ADD_READ,
	AUDIO_ADD_WRITE,
	AUDIO_ADD_READWRITE
};

static QString pixfmt2s(unsigned id)
{
	QString pixfmt;

	pixfmt += (char)(id & 0x7f);
	pixfmt += (char)((id >> 8) & 0x7f);
	pixfmt += (char)((id >> 16) & 0x7f);
	pixfmt += (char)((id >> 24) & 0x7f);
	if (id & (1 << 31))
		pixfmt += "-BE";
	return pixfmt;
}

GeneralTab::GeneralTab(const QString &device, cv4l_fd *fd, int n, QWidget *parent) :
	QGridLayout(parent),
	m_fd(fd),
	m_row(0),
	m_col(0),
	m_cols(n),
	m_minWidth(175),
	m_pxw(25.0),
	m_vMargin(10),
	m_hMargin(20),
	m_isRadio(false),
	m_isSDR(false),
	m_isVbi(false),
	m_isOutput(false),
	m_isSDTV(false),
	m_freqFac(16),
	m_freqRfFac(16),
	m_isPlanar(false),
	m_haveBuffers(false),
	m_discreteSizes(false),
	m_videoInput(NULL),
	m_videoOutput(NULL),
	m_audioInput(NULL),
	m_audioOutput(NULL),
	m_tvStandard(NULL),
	m_qryStandard(NULL),
	m_videoTimings(NULL),
	m_pixelAspectRatio(NULL),
	m_colorspace(NULL),
	m_xferFunc(NULL),
	m_ycbcrEnc(NULL),
	m_quantRange(NULL),
	m_cropping(NULL),
	m_qryTimings(NULL),
	m_freq(NULL),
	m_freqTable(NULL),
	m_freqChannel(NULL),
	m_audioMode(NULL),
	m_subchannels(NULL),
	m_freqRf(NULL),
	m_stereoMode(NULL),
	m_rdsMode(NULL),
	m_detectSubchans(NULL),
	m_vidCapFormats(NULL),
	m_vidFields(NULL),
	m_frameSize(NULL),
	m_frameWidth(NULL),
	m_frameHeight(NULL),
	m_frameInterval(NULL),
	m_vidOutFormats(NULL),
	m_capMethods(NULL),
	m_numBuffers(NULL),
	m_vbiMethods(NULL),
	m_audioInDevice(NULL),
	m_audioOutDevice(NULL),
	m_cropWidth(NULL),
	m_cropLeft(NULL),
	m_cropHeight(NULL),
	m_cropTop(NULL),
	m_composeWidth(NULL),
	m_composeLeft(NULL),
	m_composeHeight(NULL),
	m_composeTop(NULL)
{
	bool hasStreamIO = false;

	m_device.append(device);
	setSizeConstraint(QLayout::SetMinimumSize);

	for (int i = 0; i < n; i++) {
		m_maxw[i] = 0;
	}

	querycap(m_querycap);

	addTitle("General Information");

	addLabel("Device");
	addLabel(device + (m_fd->g_direct() ? "" : " (wrapped)"));

	addLabel("Driver");
	addLabel((char *)m_querycap.driver);

	addLabel("Card");
	addLabel((char *)m_querycap.card);

	addLabel("Bus");
	addLabel((char *)m_querycap.bus_info);

	g_tuner(m_tuner);
	g_tuner(m_tuner_rf, 1);
	g_modulator(m_modulator);

	v4l2_input vin;
	v4l2_output vout;
	v4l2_audio vaudio;
	v4l2_audioout vaudout;
	v4l2_fmtdesc fmt;

	if (m_tuner.capability &&
	    (m_tuner.capability & (V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_1HZ)))
		m_isRadio = true;
	if (m_modulator.capability &&
	    (m_modulator.capability & (V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_1HZ)))
		m_isRadio = true;
	if (m_querycap.capabilities & V4L2_CAP_DEVICE_CAPS) {
		m_isVbi = g_caps() & (V4L2_CAP_VBI_CAPTURE | V4L2_CAP_SLICED_VBI_CAPTURE |
				      V4L2_CAP_VBI_OUTPUT | V4L2_CAP_SLICED_VBI_OUTPUT);
		m_isSDR = g_caps() & V4L2_CAP_SDR_CAPTURE;
		if (m_isSDR)
			m_isRadio = true;
		if (g_caps() & (V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_VIDEO_OUTPUT_MPLANE |
				V4L2_CAP_VBI_OUTPUT | V4L2_CAP_SLICED_VBI_OUTPUT))
			m_isOutput = true;
	}

	if (m_querycap.capabilities &
		(V4L2_CAP_VIDEO_CAPTURE_MPLANE | V4L2_CAP_VIDEO_OUTPUT_MPLANE))
		m_isPlanar = true;

	m_stackedStandards = new QStackedWidget(parent);
	m_stackedFrameSettings = new QStackedWidget(parent);
	m_stackedFrequency = new QStackedWidget(parent);

	if (!enum_input(vin, true) || m_tuner.capability) {
		addTitle("Input Settings");
		inputSection(vin);
	}

	if (m_modulator.capability || (!isRadio() && !enum_output(vout, true))) {
		addTitle("Output Settings");
		outputSection(vout);
	}

	if (hasAlsaAudio()) {
		m_audioInDevice = new QComboBox(parent);
		m_audioOutDevice = new QComboBox(parent);
	}

	if (!isVbi() && (createAudioDeviceList() || (!isRadio() && !enum_audio(vaudio, true)) ||
	    (!isSDR() && m_tuner.capability) || (!isRadio() && !enum_audout(vaudout, true)))) {
		addTitle("Audio Settings");
		audioSection(vaudio, vaudout); 
	}
	
	if (hasAlsaAudio() && !createAudioDeviceList())
	{
		delete m_audioInDevice;
		delete m_audioOutDevice;
		m_audioInDevice = NULL;
		m_audioOutDevice = NULL;
	}
	
	if (!isSDR() && isRadio())
		goto done;

	addTitle("Format Settings");
	if (isVbi()) {
		addLabel("VBI Streaming Method");
		m_vbiMethods = new QComboBox(parentWidget());
		if (has_raw_vbi_cap() || has_raw_vbi_out())
			m_vbiMethods->addItem("Raw");
		if (has_sliced_vbi_cap() || has_sliced_vbi_out())
			m_vbiMethods->addItem("Sliced");
		addWidget(m_vbiMethods);
		connect(m_vbiMethods, SIGNAL(activated(int)), SLOT(vbiMethodsChanged(int)));
		vbiMethodsChanged(0);
		if (m_isOutput)
			updateVideoOutput();
		else
			updateVideoInput();
	} else if (!isSDR()) {
		formatSection(fmt);
	}

	addLabel("Streaming Method");
	m_capMethods = new QComboBox(parent);
	if (has_streaming()) {
		cv4l_queue q;

		// Yuck. The videobuf framework does not accept a reqbufs count of 0.
		// This is out-of-spec, but it means that the only way to test which
		// method is supported is to give it a non-zero count. But after that
		// we have to reopen the device to clear the fact that there were
		// buffers allocated. This is the only really portable way as long
		// as there are still drivers around that do not support reqbufs(0).
		q.init(g_type(), V4L2_MEMORY_USERPTR);
		if (q.reqbufs(m_fd, 1) == 0) {
			m_capMethods->addItem("User pointer I/O", QVariant(methodUser));
			m_fd->reopen(true);
			hasStreamIO = true;
		}
		q.init(g_type(), V4L2_MEMORY_MMAP);
		if (q.reqbufs(m_fd, 1) == 0) {
			m_capMethods->addItem("Memory mapped I/O", QVariant(methodMmap));
			m_fd->reopen(true);
			hasStreamIO = true;
		}
	}
	if (has_rw()) {
		if (v4l_type_is_output(g_type()))
			m_capMethods->addItem("write()", QVariant(methodRead));
		else
			m_capMethods->addItem("read()", QVariant(methodRead));
	}
	addWidget(m_capMethods);

	if (hasStreamIO) {
		addLabel("Number of Buffers");
		m_numBuffers = new QSpinBox(parent);
		m_numBuffers->setRange(1, VIDEO_MAX_FRAME);
		m_numBuffers->setValue(4);
		addWidget(m_numBuffers);
	}

	addLabel("Use Record Priority");
	m_recordPrio = new QCheckBox(parentWidget());
	addWidget(m_recordPrio);

	if (!isRadio() && !isVbi() && (has_crop() || has_compose())) {
		addTitle("Cropping & Compose Settings");
		cropSection();
	}

	if (!isSDR()) {
		if (m_isOutput)
			updateVideoOutput();
		else
			updateVideoInput();
		updateVidFormat();
	}

done:
	QGridLayout::addWidget(new QWidget(parent), rowCount(), 0, 1, n);
	setRowStretch(rowCount() - 1, 1);
	if (m_videoInput)
		updateGUIInput(m_videoInput->currentIndex());
	else if (m_videoOutput)
		updateGUIOutput(m_videoOutput->currentIndex());
	fixWidth();
}

void GeneralTab::sourceChangeSubscribe()
{
	v4l2_input vin;

	if (!enum_input(vin, true)) {
		do {
			struct v4l2_event_subscription sub = {
				V4L2_EVENT_SOURCE_CHANGE, vin.index
			};

			subscribe_event(sub);
		} while (!enum_input(vin));
	}
}

void GeneralTab::inputSection(v4l2_input vin)
{
	bool needsStd = false;
	bool needsTimings = false;

	if (!isRadio() && !enum_input(vin, true)) {
		addLabel("Input");
		m_videoInput = new QComboBox(parentWidget());
		do {
			m_videoInput->addItem((char *)vin.name);
			if (vin.capabilities & V4L2_IN_CAP_STD)
				needsStd = true;
			if (vin.capabilities & V4L2_IN_CAP_DV_TIMINGS)
				needsTimings = true;
		} while (!enum_input(vin));
		addWidget(m_videoInput);
		connect(m_videoInput, SIGNAL(activated(int)), SLOT(inputChanged(int)));
		m_row++;
		m_col = 0;
	}

	QWidget *wStd = new QWidget();
	QGridLayout *m_stdRow = new QGridLayout(wStd);
	m_grids.append(m_stdRow);

	if (needsStd) {
		v4l2_std_id tmp;

		m_tvStandard = new QComboBox(parentWidget());
		m_stdRow->addWidget(new QLabel("TV Standard", parentWidget()), 0, 0, Qt::AlignLeft);
		m_stdRow->addWidget(m_tvStandard, 0, 1, Qt::AlignLeft);
		connect(m_tvStandard, SIGNAL(activated(int)), SLOT(standardChanged(int)));
		refreshStandards();
		m_isSDTV = true;
		if (query_std(tmp) != ENOTTY) {
			m_qryStandard = new QToolButton(parentWidget());
			m_qryStandard->setIcon(QIcon(":/enterbutt.png"));
			m_stdRow->addWidget(new QLabel("Query Standard", parentWidget()), 0, 2, Qt::AlignLeft);
			m_stdRow->addWidget(m_qryStandard, 0, 3, Qt::AlignLeft);
			connect(m_qryStandard, SIGNAL(clicked()), SLOT(qryStdClicked()));
		}
	}

	QWidget *wTim = new QWidget();
	QGridLayout *m_timRow = new QGridLayout(wTim);
	m_grids.append(m_timRow);

	if (needsTimings) {
		m_videoTimings = new QComboBox(parentWidget());
		m_timRow->addWidget(new QLabel("Video Timings", parentWidget()), 0, 0, Qt::AlignLeft);
		m_timRow->addWidget(m_videoTimings, 0, 1, Qt::AlignLeft);
		connect(m_videoTimings, SIGNAL(activated(int)), SLOT(timingsChanged(int)));
		refreshTimings();
		m_qryTimings = new QToolButton(parentWidget());
		m_qryTimings->setIcon(QIcon(":/enterbutt.png"));
		m_timRow->addWidget(new QLabel("Query Timings", parentWidget()), 0, 2, Qt::AlignLeft);
		m_timRow->addWidget(m_qryTimings, 0, 3, Qt::AlignLeft);
		connect(m_qryTimings, SIGNAL(clicked()), SLOT(qryTimingsClicked()));
	}

	m_stackedStandards->addWidget(wStd);
	m_stackedStandards->addWidget(wTim);
	QGridLayout::addWidget(m_stackedStandards, m_row, 0, 1, m_cols, Qt::AlignVCenter);
	m_row++;

	QWidget *wFreq = new QWidget();
	QGridLayout *m_freqRows = new QGridLayout(wFreq);
	m_grids.append(m_freqRows);

	if (m_tuner.capability) {
		const char *unit = (m_tuner.capability & V4L2_TUNER_CAP_LOW) ? " kHz" :
			(m_tuner.capability & V4L2_TUNER_CAP_1HZ ? " Hz" : " MHz");
		const char *name = m_isSDR ? "ADC Frequency" : "Frequency";

		m_freqFac = (m_tuner.capability & V4L2_TUNER_CAP_1HZ) ? 1 : 16;
		m_freq = new QDoubleSpinBox(parentWidget());
		m_freq->setMinimum(m_tuner.rangelow / m_freqFac);
		m_freq->setMaximum(m_tuner.rangehigh / m_freqFac);
		m_freq->setSingleStep(1.0 / m_freqFac);
		m_freq->setSuffix(unit);
		m_freq->setDecimals((m_tuner.capability & V4L2_TUNER_CAP_1HZ) ? 0 : 4);
		m_freq->setWhatsThis(QString("%1\nLow: %2 %4\nHigh: %3 %4")
				     .arg(name)
				     .arg((double)m_tuner.rangelow / m_freqFac, 0, 'f', 2)
				     .arg((double)m_tuner.rangehigh / m_freqFac, 0, 'f', 2)
				     .arg(unit));
		m_freq->setStatusTip(m_freq->whatsThis());
		connect(m_freq, SIGNAL(valueChanged(double)), SLOT(freqChanged(double)));
		updateFreq();
		m_freqRows->addWidget(new QLabel(name, parentWidget()), 0, 0, Qt::AlignLeft);
		m_freqRows->addWidget(m_freq, 0, 1, Qt::AlignLeft);
	}

	if (m_tuner_rf.capability) {
		const char *unit = (m_tuner_rf.capability & V4L2_TUNER_CAP_LOW) ? " kHz" :
			(m_tuner_rf.capability & V4L2_TUNER_CAP_1HZ ? " Hz" : " MHz");

		m_freqRfFac = (m_tuner_rf.capability & V4L2_TUNER_CAP_1HZ) ? 1 : 16;
		m_freqRf = new QDoubleSpinBox(parentWidget());
		m_freqRf->setMinimum(m_tuner_rf.rangelow / m_freqRfFac);
		m_freqRf->setMaximum(m_tuner_rf.rangehigh / m_freqRfFac);
		m_freqRf->setSingleStep(1.0 / m_freqRfFac);
		m_freqRf->setSuffix(unit);
		m_freqRf->setDecimals((m_tuner_rf.capability & V4L2_TUNER_CAP_1HZ) ? 0 : 4);
		m_freqRf->setWhatsThis(QString("RF Frequency\nLow: %1 %3\nHigh: %2 %3")
				    .arg((double)m_tuner_rf.rangelow / m_freqRfFac, 0, 'f', 2)
				    .arg((double)m_tuner_rf.rangehigh / m_freqRfFac, 0, 'f', 2)
				    .arg(unit));
		m_freqRf->setStatusTip(m_freqRf->whatsThis());
		connect(m_freqRf, SIGNAL(valueChanged(double)), SLOT(freqRfChanged(double)));
		updateFreqRf();
		m_freqRows->addWidget(new QLabel("RF Frequency", parentWidget()), 0, 2, Qt::AlignLeft);
		m_freqRows->addWidget(m_freqRf, 0, 3, Qt::AlignLeft);
	} else if (!isSDR()) {
		QLabel *l = new QLabel("Refresh Tuner Status", parentWidget());
		QWidget *w = new QWidget(parentWidget());
		QHBoxLayout *box = new QHBoxLayout(w);

		box->setMargin(0);
		m_detectSubchans = new QToolButton(w);
		m_detectSubchans->setIcon(QIcon(":/enterbutt.png"));
		m_subchannels = new QLabel("", w);
		box->addWidget(m_detectSubchans, 0, Qt::AlignLeft);
		box->addWidget(m_subchannels, 0, Qt::AlignLeft);
		m_freqRows->addWidget(l, 0, 2, Qt::AlignLeft);
		m_freqRows->addWidget(w, 0, 3, Qt::AlignLeft);
		connect(m_detectSubchans, SIGNAL(clicked()), SLOT(detectSubchansClicked()));
		detectSubchansClicked();
	}

	if (m_tuner.capability && !isRadio()) {
		m_freqTable = new QComboBox(parentWidget());
		for (int i = 0; v4l2_channel_lists[i].name; i++) {
			m_freqTable->addItem(v4l2_channel_lists[i].name);
		}
		m_freqRows->addWidget(new QLabel("Frequency Table", parentWidget()), 1, 0, Qt::AlignLeft);
		m_freqRows->addWidget(m_freqTable, 1, 1, Qt::AlignLeft);
		connect(m_freqTable, SIGNAL(activated(int)), SLOT(freqTableChanged(int)));

		m_freqChannel = new QComboBox(parentWidget());
		m_freqRows->addWidget(new QLabel("Channels", parentWidget()), 1, 2, Qt::AlignLeft);
		m_freqRows->addWidget(m_freqChannel, 1, 3, Qt::AlignLeft);
		connect(m_freqChannel, SIGNAL(activated(int)), SLOT(freqChannelChanged(int)));
		updateFreqChannel();
	}

	m_stackedFrequency->addWidget(wFreq);
	QGridLayout::addWidget(m_stackedFrequency, m_row, 0, 2, m_cols, Qt::AlignVCenter);
	m_row += 2;

	if (isRadio() || isVbi())
		return;

	QWidget *wFrameWH = new QWidget();
	QWidget *wFrameSR = new QWidget();
	QGridLayout *m_wh = new QGridLayout(wFrameWH);
	QGridLayout *m_sr = new QGridLayout(wFrameSR);
	m_grids.append(m_wh);
	m_grids.append(m_sr);

	m_wh->addWidget(new QLabel("Frame Width", parentWidget()), 0, 0, Qt::AlignLeft);
	m_frameWidth = new QSpinBox(parentWidget());
	m_wh->addWidget(m_frameWidth, 0, 1, Qt::AlignLeft);
	connect(m_frameWidth, SIGNAL(editingFinished()), SLOT(frameWidthChanged()));

	m_wh->addWidget(new QLabel("Frame Height", parentWidget()), 0, 2, Qt::AlignLeft);
	m_frameHeight = new QSpinBox(parentWidget());
	m_wh->addWidget(m_frameHeight, 0, 3, Qt::AlignLeft);
	connect(m_frameHeight, SIGNAL(editingFinished()), SLOT(frameHeightChanged()));

	m_sr->addWidget(new QLabel("Frame Size", parentWidget()), 0, 0, Qt::AlignLeft);
	m_frameSize = new QComboBox(parentWidget());
	m_sr->addWidget(m_frameSize, 0, 1, Qt::AlignLeft);
	connect(m_frameSize, SIGNAL(activated(int)), SLOT(frameSizeChanged(int)));

	m_sr->addWidget(new QLabel("Frame Rate", parentWidget()), 0, 2, Qt::AlignLeft);
	m_frameInterval = new QComboBox(parentWidget());
	m_sr->addWidget(m_frameInterval, 0, 3, Qt::AlignLeft);
	connect(m_frameInterval, SIGNAL(activated(int)), SLOT(frameIntervalChanged(int)));

	m_stackedFrameSettings->addWidget(wFrameWH);
	m_stackedFrameSettings->addWidget(wFrameSR);

	QGridLayout::addWidget(m_stackedFrameSettings, m_row, 0, 1, m_cols, Qt::AlignVCenter);
	m_row++;
}

void GeneralTab::outputSection(v4l2_output vout)
{
	bool needsStd = false;
	bool needsTimings = false;

	if (!isRadio() && !enum_output(vout, true)) {
		addLabel("Output");
		m_videoOutput = new QComboBox(parentWidget());
		do {
			m_videoOutput->addItem((char *)vout.name);
			if (vout.capabilities & V4L2_OUT_CAP_STD)
				needsStd = true;
			if (vout.capabilities & V4L2_OUT_CAP_DV_TIMINGS)
				needsTimings = true;
		} while (!enum_output(vout));
		addWidget(m_videoOutput);
		connect(m_videoOutput, SIGNAL(activated(int)), SLOT(outputChanged(int)));
		updateVideoOutput();
		m_row++;
		m_col = 0;
	}

	QWidget *wStd = new QWidget();
	QGridLayout *m_stdRow = new QGridLayout(wStd);
	m_grids.append(m_stdRow);

	if (needsStd) {
		m_tvStandard = new QComboBox(parentWidget());
		m_stdRow->addWidget(new QLabel("TV Standard", parentWidget()), 0, 0, Qt::AlignLeft);
		m_stdRow->addWidget(m_tvStandard, 0, 1, Qt::AlignLeft);
		connect(m_tvStandard, SIGNAL(activated(int)), SLOT(standardChanged(int)));
		m_isSDTV = true;
		refreshStandards();
	}

	QWidget *wTim = new QWidget();
	QGridLayout *m_timRow = new QGridLayout(wTim);
	m_grids.append(m_timRow);

	if (needsTimings) {
		m_videoTimings = new QComboBox(parentWidget());
		m_timRow->addWidget(new QLabel("Video Timings", parentWidget()), 0, 0, Qt::AlignLeft);
		m_timRow->addWidget(m_videoTimings, 0, 1, Qt::AlignLeft);
		connect(m_videoTimings, SIGNAL(activated(int)), SLOT(timingsChanged(int)));
		refreshTimings();
	}

	m_stackedStandards->addWidget(wStd);
	m_stackedStandards->addWidget(wTim);
	QGridLayout::addWidget(m_stackedStandards, m_row, 0, 1, m_cols, Qt::AlignVCenter);
	m_row++;

	if (m_modulator.capability) {
		const char *unit = (m_modulator.capability & V4L2_TUNER_CAP_LOW) ? " kHz" :
			(m_modulator.capability & V4L2_TUNER_CAP_1HZ ? " Hz" : " MHz");

		m_freqFac = (m_modulator.capability & V4L2_TUNER_CAP_1HZ) ? 1 : 16;
		m_freq = new QDoubleSpinBox(parentWidget());
		m_freq->setMinimum(m_modulator.rangelow / m_freqFac);
		m_freq->setMaximum(m_modulator.rangehigh / m_freqFac);
		m_freq->setSingleStep(1.0 / m_freqFac);
		m_freq->setSuffix(unit);
		m_freq->setDecimals((m_modulator.capability & V4L2_TUNER_CAP_1HZ) ? 0 : 4);
		m_freq->setWhatsThis(QString("Frequency\nLow: %1 %3\nHigh: %2 %3")
				    .arg((double)m_modulator.rangelow / m_freqFac, 0, 'f', 2)
				    .arg((double)m_modulator.rangehigh / m_freqFac, 0, 'f', 2)
				    .arg(unit));
		m_freq->setStatusTip(m_freq->whatsThis());
		connect(m_freq, SIGNAL(valueChanged(double)), SLOT(freqChanged(double)));
		updateFreq();
		addLabel("Frequency");
		addWidget(m_freq);

		if (m_modulator.capability & V4L2_TUNER_CAP_STEREO) {
			addLabel("Stereo");
			m_stereoMode = new QCheckBox(parentWidget());
			m_stereoMode->setCheckState((m_modulator.txsubchans & V4L2_TUNER_SUB_STEREO) ?
					Qt::Checked : Qt::Unchecked);
			addWidget(m_stereoMode);
			connect(m_stereoMode, SIGNAL(clicked()), SLOT(stereoModeChanged()));
		}
		if (m_modulator.capability & V4L2_TUNER_CAP_RDS) {
			addLabel("RDS");
			m_rdsMode = new QCheckBox(parentWidget());
			m_rdsMode->setCheckState((m_modulator.txsubchans & V4L2_TUNER_SUB_RDS) ?
					Qt::Checked : Qt::Unchecked);
			addWidget(m_rdsMode);
			connect(m_rdsMode, SIGNAL(clicked()), SLOT(rdsModeChanged()));
		}
	}

	if (isRadio())
		return;

	QWidget *wFrameWH = new QWidget();
	QGridLayout *m_wh = new QGridLayout(wFrameWH);
	m_grids.append(m_wh);

	m_wh->addWidget(new QLabel("Frame Width", parentWidget()), 0, 0, Qt::AlignLeft);
	m_frameWidth = new QSpinBox(parentWidget());
	m_wh->addWidget(m_frameWidth, 0, 1, Qt::AlignLeft);
	connect(m_frameWidth, SIGNAL(editingFinished()), SLOT(frameWidthChanged()));

	m_wh->addWidget(new QLabel("Frame Height", parentWidget()), 0, 2, Qt::AlignLeft);
	m_frameHeight = new QSpinBox(parentWidget());
	m_wh->addWidget(m_frameHeight, 0, 3, Qt::AlignLeft);
	connect(m_frameHeight, SIGNAL(editingFinished()), SLOT(frameHeightChanged()));

	m_stackedFrameSettings->addWidget(wFrameWH);

	QGridLayout::addWidget(m_stackedFrameSettings, m_row, 0, 1, m_cols, Qt::AlignVCenter);
	m_row++;
}

void GeneralTab::audioSection(v4l2_audio vaudio, v4l2_audioout vaudout)
{
	if (hasAlsaAudio() && !m_isOutput) {
		if (createAudioDeviceList()) {
			addLabel("Audio Input Device");
			connect(m_audioInDevice, SIGNAL(activated(int)), SLOT(changeAudioDevice()));
			addWidget(m_audioInDevice);

			addLabel("Audio Output Device");
			connect(m_audioOutDevice, SIGNAL(activated(int)), SLOT(changeAudioDevice()));
			addWidget(m_audioOutDevice);

			if (isRadio()) {
				setAudioDeviceBufferSize(75);
			} else {
				v4l2_fract fract;
				if (m_fd->get_interval(fract)) {
					// Default values are for 30 FPS
					fract.numerator = 33;
					fract.denominator = 1000;
				}
				// Standard capacity is two frames
				setAudioDeviceBufferSize((fract.numerator * 2000) / fract.denominator);
			}
		} else {
			delete m_audioInDevice;
			delete m_audioOutDevice;
			m_audioInDevice = NULL;
			m_audioOutDevice = NULL;
		}
	}

	if (!isRadio() && !enum_audio(vaudio, true)) {
		addLabel("Input Audio");
		m_audioInput = new QComboBox(parentWidget());
		m_audioInput->setMinimumContentsLength(10);
		do {
			m_audioInput->addItem((char *)vaudio.name);
		} while (!enum_audio(vaudio));
		addWidget(m_audioInput);
		connect(m_audioInput, SIGNAL(activated(int)), SLOT(inputAudioChanged(int)));
		updateAudioInput();
	}

	if (m_tuner.capability && !isSDR()) {
		addLabel("Audio Mode");
		m_audioMode = new QComboBox(parentWidget());
		m_audioMode->setMinimumContentsLength(12);
		m_audioMode->addItem("Mono");
		int audIdx = 0;
		m_audioModes[audIdx++] = V4L2_TUNER_MODE_MONO;
		if (m_tuner.capability & V4L2_TUNER_CAP_STEREO) {
			m_audioMode->addItem("Stereo");
			m_audioModes[audIdx++] = V4L2_TUNER_MODE_STEREO;
		}
		if (m_tuner.capability & V4L2_TUNER_CAP_LANG1) {
			m_audioMode->addItem("Language 1");
			m_audioModes[audIdx++] = V4L2_TUNER_MODE_LANG1;
		}
		if (m_tuner.capability & V4L2_TUNER_CAP_LANG2) {
			m_audioMode->addItem("Language 2");
			m_audioModes[audIdx++] = V4L2_TUNER_MODE_LANG2;
		}
		if ((m_tuner.capability & (V4L2_TUNER_CAP_LANG1 | V4L2_TUNER_CAP_LANG2)) ==
				(V4L2_TUNER_CAP_LANG1 | V4L2_TUNER_CAP_LANG2)) {
			m_audioMode->addItem("Language 1+2");
			m_audioModes[audIdx++] = V4L2_TUNER_MODE_LANG1_LANG2;
		}
		addWidget(m_audioMode);
		for (int i = 0; i < audIdx; i++)
			if (m_audioModes[i] == m_tuner.audmode)
				m_audioMode->setCurrentIndex(i);
		connect(m_audioMode, SIGNAL(activated(int)), SLOT(audioModeChanged(int)));
	}

	if (!isRadio() && !enum_audout(vaudout, true)) {
		addLabel("Output Audio");
		m_audioOutput = new QComboBox(parentWidget());
		m_audioOutput->setMinimumContentsLength(10);
		do {
			m_audioOutput->addItem((char *)vaudout.name);
		} while (!enum_audout(vaudout));
		addWidget(m_audioOutput);
		connect(m_audioOutput, SIGNAL(activated(int)), SLOT(outputAudioChanged(int)));
		updateAudioOutput();
	}
}

void GeneralTab::formatSection(v4l2_fmtdesc fmt)
{
	if (m_isOutput) {
		addLabel("Output Image Formats");
		m_vidOutFormats = new QComboBox(parentWidget());
		m_vidOutFormats->setMinimumContentsLength(20);
		if (!enum_fmt(fmt, true)) {
			do {
				m_vidOutFormats->addItem(pixfmt2s(fmt.pixelformat) +
					" (" + (const char *)fmt.description + ")");
			} while (!enum_fmt(fmt));
		}
		addWidget(m_vidOutFormats);
		connect(m_vidOutFormats, SIGNAL(activated(int)), SLOT(vidOutFormatChanged(int)));
	} else {
		addLabel("Capture Image Formats");
		m_vidCapFormats = new QComboBox(parentWidget());
		m_vidCapFormats->setMinimumContentsLength(20);
		if (!enum_fmt(fmt, true)) {
			do {
				QString s(pixfmt2s(fmt.pixelformat) + " (");

				if (fmt.flags & V4L2_FMT_FLAG_EMULATED)
					m_vidCapFormats->addItem(s + "Emulated)");
				else
					m_vidCapFormats->addItem(s + (const char *)fmt.description + ")");
			} while (!enum_fmt(fmt));
		}
		addWidget(m_vidCapFormats);
		connect(m_vidCapFormats, SIGNAL(activated(int)), SLOT(vidCapFormatChanged(int)));
	}

	addLabel("Field");
	m_vidFields = new QComboBox(parentWidget());
	m_vidFields->setMinimumContentsLength(21);
	addWidget(m_vidFields);
	connect(m_vidFields, SIGNAL(activated(int)), SLOT(vidFieldChanged(int)));

	if (!isRadio() && !isVbi()) {
		m_colorspace = new QComboBox(parentWidget());
		m_colorspace->addItem(m_isOutput ? "Default" : "Autodetect", QVariant(V4L2_COLORSPACE_DEFAULT));
		m_colorspace->addItem("SMPTE 170M", QVariant(V4L2_COLORSPACE_SMPTE170M));
		m_colorspace->addItem("Rec. 709", QVariant(V4L2_COLORSPACE_REC709));
		m_colorspace->addItem("sRGB", QVariant(V4L2_COLORSPACE_SRGB));
		m_colorspace->addItem("Adobe RGB", QVariant(V4L2_COLORSPACE_ADOBERGB));
		m_colorspace->addItem("BT.2020", QVariant(V4L2_COLORSPACE_BT2020));
		m_colorspace->addItem("DCI-P3", QVariant(V4L2_COLORSPACE_DCI_P3));
		m_colorspace->addItem("SMPTE 240M", QVariant(V4L2_COLORSPACE_SMPTE240M));
		m_colorspace->addItem("470 System M", QVariant(V4L2_COLORSPACE_470_SYSTEM_M));
		m_colorspace->addItem("470 System BG", QVariant(V4L2_COLORSPACE_470_SYSTEM_BG));

		addLabel("Colorspace");
		addWidget(m_colorspace);
		connect(m_colorspace, SIGNAL(activated(int)), SLOT(colorspaceChanged(int)));

		m_xferFunc = new QComboBox(parentWidget());
		m_xferFunc->addItem(m_isOutput ? "Default" : "Autodetect", QVariant(V4L2_XFER_FUNC_DEFAULT));
		m_xferFunc->addItem("Rec. 709", QVariant(V4L2_XFER_FUNC_709));
		m_xferFunc->addItem("sRGB", QVariant(V4L2_XFER_FUNC_SRGB));
		m_xferFunc->addItem("Adobe RGB", QVariant(V4L2_XFER_FUNC_ADOBERGB));
		m_xferFunc->addItem("DCI-P3", QVariant(V4L2_XFER_FUNC_DCI_P3));
		m_xferFunc->addItem("SMPTE 2084", QVariant(V4L2_XFER_FUNC_SMPTE2084));
		m_xferFunc->addItem("SMPTE 240M", QVariant(V4L2_XFER_FUNC_SMPTE240M));
		m_xferFunc->addItem("None", QVariant(V4L2_XFER_FUNC_NONE));

		addLabel("Transfer Function");
		addWidget(m_xferFunc);
		connect(m_xferFunc, SIGNAL(activated(int)), SLOT(xferFuncChanged(int)));

		m_ycbcrEnc = new QComboBox(parentWidget());
		m_ycbcrEnc->addItem(m_isOutput ? "Default" : "Autodetect", QVariant(V4L2_YCBCR_ENC_DEFAULT));
		m_ycbcrEnc->addItem("ITU-R 601", QVariant(V4L2_YCBCR_ENC_601));
		m_ycbcrEnc->addItem("Rec. 709", QVariant(V4L2_YCBCR_ENC_709));
		m_ycbcrEnc->addItem("xvYCC 601", QVariant(V4L2_YCBCR_ENC_XV601));
		m_ycbcrEnc->addItem("xvYCC 709", QVariant(V4L2_YCBCR_ENC_XV709));
		m_ycbcrEnc->addItem("BT.2020", QVariant(V4L2_YCBCR_ENC_BT2020));
		m_ycbcrEnc->addItem("BT.2020 Constant Luminance", QVariant(V4L2_YCBCR_ENC_BT2020_CONST_LUM));
		m_ycbcrEnc->addItem("SMPTE 240M", QVariant(V4L2_YCBCR_ENC_SMPTE240M));
		m_ycbcrEnc->addItem("HSV with Hue 0-179", QVariant(V4L2_HSV_ENC_180));
		m_ycbcrEnc->addItem("HSV with Hue 0-255", QVariant(V4L2_HSV_ENC_256));

		addLabel("Y'CbCr/HSV Encoding");
		addWidget(m_ycbcrEnc);
		connect(m_ycbcrEnc, SIGNAL(activated(int)), SLOT(ycbcrEncChanged(int)));

		m_quantRange = new QComboBox(parentWidget());
		m_quantRange->addItem(m_isOutput ? "Default" : "Autodetect", QVariant(V4L2_QUANTIZATION_DEFAULT));
		m_quantRange->addItem("Full Range", QVariant(V4L2_QUANTIZATION_FULL_RANGE));
		m_quantRange->addItem("Limited Range", QVariant(V4L2_QUANTIZATION_LIM_RANGE));

		addLabel("Quantization");
		addWidget(m_quantRange);
		connect(m_quantRange, SIGNAL(activated(int)), SLOT(quantRangeChanged(int)));
	}

	if (m_isOutput)
		return;

	m_cropping = new QComboBox(parentWidget());
	m_cropping->addItem("Source Width and Height");
	m_cropping->addItem("Crop Top and Bottom Line");
	m_cropping->addItem("Traditional 4:3");
	m_cropping->addItem("Widescreen 14:9");
	m_cropping->addItem("Widescreen 16:9");
	m_cropping->addItem("Cinema 1.85:1");
	m_cropping->addItem("Cinema 2.39:1");

	addLabel("Video Aspect Ratio");
	addWidget(m_cropping);
	connect(m_cropping, SIGNAL(activated(int)), SIGNAL(croppingChanged()));

	if (!isRadio() && !isVbi()) {
		m_pixelAspectRatio = new QComboBox(parentWidget());
		m_pixelAspectRatio->addItem("Autodetect");
		m_pixelAspectRatio->addItem("Square");
		m_pixelAspectRatio->addItem("NTSC/PAL-M/PAL-60");
		m_pixelAspectRatio->addItem("NTSC/PAL-M/PAL-60, Anamorphic");
		m_pixelAspectRatio->addItem("PAL/SECAM");
		m_pixelAspectRatio->addItem("PAL/SECAM, Anamorphic");

		// Update hints by calling a get
		getPixelAspectRatio();

		addLabel("Pixel Aspect Ratio");
		addWidget(m_pixelAspectRatio);
		connect(m_pixelAspectRatio, SIGNAL(activated(int)), SLOT(changePixelAspectRatio()));
	}
}

void GeneralTab::cropSection()
{
	if (has_crop()) {
		m_cropWidth = new QSlider(Qt::Horizontal, parentWidget());
		m_cropWidth->setSizePolicy(QSizePolicy::MinimumExpanding, QSizePolicy::Minimum);
		m_cropWidth->setRange(1, 100);
		m_cropWidth->setSliderPosition(100);
		addLabel("Crop Width");
		addWidget(m_cropWidth);
		connect(m_cropWidth, SIGNAL(valueChanged(int)), SLOT(cropChanged()));

		m_cropLeft = new QSlider(Qt::Horizontal, parentWidget());
		m_cropLeft->setSizePolicy(QSizePolicy::MinimumExpanding, QSizePolicy::Minimum);
		m_cropLeft->setRange(0, 100);
		m_cropLeft->setSliderPosition(0);
		addLabel("Crop Left Offset");
		addWidget(m_cropLeft);
		connect(m_cropLeft, SIGNAL(valueChanged(int)), SLOT(cropChanged()));

		m_cropHeight = new QSlider(Qt::Horizontal, parentWidget());
		m_cropHeight->setSizePolicy(QSizePolicy::MinimumExpanding, QSizePolicy::Minimum);
		m_cropHeight->setRange(1, 100);
		m_cropHeight->setSliderPosition(100);
		addLabel("Crop Height");
		addWidget(m_cropHeight);
		connect(m_cropHeight, SIGNAL(valueChanged(int)), SLOT(cropChanged()));

		m_cropTop = new QSlider(Qt::Horizontal, parentWidget());
		m_cropTop->setSizePolicy(QSizePolicy::MinimumExpanding, QSizePolicy::Minimum);
		m_cropTop->setRange(0, 100);
		m_cropTop->setSliderPosition(0);
		addLabel("Crop Top Offset");
		addWidget(m_cropTop);
		connect(m_cropTop, SIGNAL(valueChanged(int)), SLOT(cropChanged()));
	}

	if (has_compose()) {
		m_composeWidth = new QSlider(Qt::Horizontal, parentWidget());
		m_composeWidth->setSizePolicy(QSizePolicy::MinimumExpanding, QSizePolicy::Minimum);
		m_composeWidth->setRange(1, 100);
		m_composeWidth->setSliderPosition(100);
		addLabel("Compose Width");
		addWidget(m_composeWidth);
		connect(m_composeWidth, SIGNAL(valueChanged(int)), SLOT(composeChanged()));

		m_composeLeft = new QSlider(Qt::Horizontal, parentWidget());
		m_composeLeft->setSizePolicy(QSizePolicy::MinimumExpanding, QSizePolicy::Minimum);
		m_composeLeft->setRange(0, 100);
		m_composeLeft->setSliderPosition(0);
		addLabel("Compose Left Offset");
		addWidget(m_composeLeft);
		connect(m_composeLeft, SIGNAL(valueChanged(int)), SLOT(composeChanged()));

		m_composeHeight = new QSlider(Qt::Horizontal, parentWidget());
		m_composeHeight->setSizePolicy(QSizePolicy::MinimumExpanding, QSizePolicy::Minimum);
		m_composeHeight->setRange(1, 100);
		m_composeHeight->setSliderPosition(100);
		addLabel("Compose Height");
		addWidget(m_composeHeight);
		connect(m_composeHeight, SIGNAL(valueChanged(int)), SLOT(composeChanged()));

		m_composeTop = new QSlider(Qt::Horizontal, parentWidget());
		m_composeTop->setSizePolicy(QSizePolicy::MinimumExpanding, QSizePolicy::Minimum);
		m_composeTop->setRange(0, 100);
		m_composeTop->setSliderPosition(0);
		addLabel("Compose Top Offset");
		addWidget(m_composeTop);
		connect(m_composeTop, SIGNAL(valueChanged(int)), SLOT(composeChanged()));
	}

}

void GeneralTab::fixWidth()
{
	setContentsMargins(m_hMargin, m_vMargin, m_hMargin, m_vMargin);
	setColumnStretch(3, 1);

	QList<QWidget *> list = parentWidget()->findChildren<QWidget *>();
	QList<QWidget *>::iterator it;
	for (it = list.begin(); it != list.end(); ++it)	{
		if (!qobject_cast<QComboBox *>(*it) &&
		    !qobject_cast<QSpinBox *>(*it) &&
		    !qobject_cast<QSlider *>(*it))
			continue;

		if (((*it)->sizeHint().width()) > m_minWidth) {
			m_increment = (int) ceil(((*it)->sizeHint().width() - m_minWidth) / m_pxw);
			(*it)->setMinimumWidth(m_minWidth + m_increment * m_pxw); // for stepsize expansion of widgets
		}
	}

	// fix width of subgrids
	QList<QGridLayout *>::iterator i;
	for (i = m_grids.begin(); i != m_grids.end(); ++i) {
		(*i)->setColumnStretch(3, 1);
		(*i)->setContentsMargins(0, 0, 0, 0);
		for (int n = 0; n < (*i)->count(); n++) {
			if ((*i)->itemAt(n)->widget()->sizeHint().width() > m_maxw[n % 4]) {
				m_maxw[n % 4] = (*i)->itemAt(n)->widget()->sizeHint().width();
			}
			if (n % 2) {
				if (!qobject_cast<QToolButton*>((*i)->itemAt(n)->widget()))
					(*i)->itemAt(n)->widget()->setMinimumWidth(m_minWidth);
			} else {
				(*i)->itemAt(n)->widget()->setMinimumWidth(m_maxw[n % 4]);
			}
		}
		for (int j = 0; j < m_cols; j++) {
			if (j % 2)
				(*i)->setColumnMinimumWidth(j,m_maxw[j] + m_pxw);
			else
				(*i)->setColumnMinimumWidth(j,m_maxw[j]);
		}
	}

	for (int j = 0; j < m_cols; j++) {
		if (j % 2)
			setColumnMinimumWidth(j, m_maxw[j] + m_pxw);
		else
			setColumnMinimumWidth(j, m_maxw[j]);
	}
}

unsigned GeneralTab::getNumBuffers() const
{
	return m_numBuffers ? m_numBuffers->value() : 4;
}

void GeneralTab::setHaveBuffers(bool haveBuffers)
{
	m_haveBuffers = haveBuffers;

	if (m_videoInput)
		m_videoInput->setDisabled(haveBuffers);
	if (m_videoOutput)
		m_videoOutput->setDisabled(haveBuffers);
	if (m_tvStandard)
		m_tvStandard->setDisabled(haveBuffers);
	if (m_videoTimings)
		m_videoTimings->setDisabled(haveBuffers);
	if (m_vidCapFormats)
		m_vidCapFormats->setDisabled(haveBuffers);
	if (m_vidFields)
		m_vidFields->setDisabled(haveBuffers);
	if (m_frameSize && m_discreteSizes)
		m_frameSize->setDisabled(haveBuffers);
	if (m_frameWidth && !m_discreteSizes)
		m_frameWidth->setDisabled(haveBuffers);
	if (m_frameHeight && !m_discreteSizes)
		m_frameHeight->setDisabled(haveBuffers);
	if (m_vidOutFormats)
		m_vidOutFormats->setDisabled(haveBuffers);
	if (m_capMethods)
		m_capMethods->setDisabled(haveBuffers);
	if (m_vbiMethods)
		m_vbiMethods->setDisabled(haveBuffers);
}

bool GeneralTab::filterAudioDevice(QString &deviceName)
{
	// Only show hw devices
	return deviceName.contains("hw") && !deviceName.contains("plughw");
}

int GeneralTab::addAudioDevice(void *hint, int deviceNum)
{
	int added = 0;
#ifdef HAVE_ALSA
	char *name;
	char *iotype;
	QString deviceName;
	QString listName;
	QStringList deviceType;
	iotype = snd_device_name_get_hint(hint, "IOID");
	name = snd_device_name_get_hint(hint, "NAME");
	deviceName.append(name);

	snd_card_get_name(deviceNum, &name);
	listName.append(name);

	deviceType = deviceName.split(":");

	// Add device io capability to list name
	if (m_fullAudioName) {
		listName.append(" ");

		// Makes the surround name more readable
		if (deviceName.contains("surround"))
			listName.append(QString("surround %1.%2")
					.arg(deviceType.value(0)[8]).arg(deviceType.value(0)[9]));
		else
			listName.append(deviceType.value(0));

	} else if (!deviceType.value(0).contains("default")) {
		listName.append(" ").append(deviceType.value(0));
	}

	// Add device number if it is not 0
	if (deviceName.contains("DEV=")) {
		int devNo;
		QStringList deviceNo = deviceName.split("DEV=");
		devNo = deviceNo.value(1).toInt();
		if (devNo)
			listName.append(QString(" %1").arg(devNo));
	}

	if ((iotype == NULL || strncmp(iotype, "Input", 5) == 0) && filterAudioDevice(deviceName)) {
		m_audioInDeviceMap[m_audioInDevice->count()] = snd_device_name_get_hint(hint, "NAME");
		m_audioInDevice->addItem(listName);
		added += AUDIO_ADD_READ;
	}

	if ((iotype == NULL || strncmp(iotype, "Output", 6) == 0)  && filterAudioDevice(deviceName)) {
		m_audioOutDeviceMap[m_audioOutDevice->count()] = snd_device_name_get_hint(hint, "NAME");
		m_audioOutDevice->addItem(listName);
		added += AUDIO_ADD_WRITE;
	}
#endif
	return added;
}

bool GeneralTab::createAudioDeviceList()
{
#ifdef HAVE_ALSA
	if (m_audioInDevice == NULL || m_audioOutDevice == NULL || m_isOutput)
		return false;

	m_audioInDevice->clear();
	m_audioOutDevice->clear();
	m_audioInDeviceMap.clear();
	m_audioOutDeviceMap.clear();

	m_audioInDevice->addItem("None");
	m_audioOutDevice->addItem("Default");
	m_audioInDeviceMap[0] = "None";
	m_audioOutDeviceMap[0] = "default";

	int deviceNum = -1;
	int audioDevices = 0;
	int matchDevice = matchAudioDevice();
	int indexDevice = -1;
	int indexCount = 0;

	while (snd_card_next(&deviceNum) >= 0) {
		if (deviceNum == -1)
			break;

		audioDevices++;
		if (deviceNum == matchDevice && indexDevice == -1)
			indexDevice = indexCount;

		void **hint;

		snd_device_name_hint(deviceNum, "pcm", &hint);
		for (int i = 0; hint[i] != NULL; i++) {
			int addAs = addAudioDevice(hint[i], deviceNum);
			if (addAs == AUDIO_ADD_READ || addAs == AUDIO_ADD_READWRITE)
				indexCount++;
		}
		snd_device_name_free_hint(hint);
	}

	snd_config_update_free_global();
	m_audioInDevice->setCurrentIndex(indexDevice + 1);
	changeAudioDevice();
	return m_audioInDeviceMap.size() > 1 && m_audioOutDeviceMap.size() > 1 && audioDevices > 1;
#else
	return false;
#endif
}

void GeneralTab::changeAudioDevice()
{
	m_audioOutDevice->setEnabled(getAudioInDevice() != NULL ? getAudioInDevice().compare("None") : false);
	emit audioDeviceChanged();
}

void GeneralTab::addWidget(QWidget *w, Qt::Alignment align)
{
	if (m_col % 2 && !qobject_cast<QToolButton*>(w))
		w->setMinimumWidth(m_minWidth);
	if (w->sizeHint().width() > m_maxw[m_col])
		m_maxw[m_col] = w->sizeHint().width();
	QGridLayout::addWidget(w, m_row, m_col, align | Qt::AlignVCenter);
	m_col++;
	if (m_col == m_cols) {
		m_col = 0;
		m_row++;
	}
}

void GeneralTab::addTitle(const QString &titlename)
{
	m_row++;
	QLabel *title_info = new QLabel(titlename, parentWidget());
	QFont f = title_info->font();
	f.setBold(true);
	title_info->setFont(f);

	QGridLayout::addWidget(title_info, m_row, 0, 1, m_cols, Qt::AlignLeft);
	setRowMinimumHeight(m_row, 25);
	m_row++;

	QFrame *m_line = new QFrame(parentWidget());
	m_line->setFrameShape(QFrame::HLine);
	m_line->setFrameShadow(QFrame::Sunken);
	QGridLayout::addWidget(m_line, m_row, 0, 1, m_cols, Qt::AlignVCenter);
	m_row++;
	m_col = 0;
}

int GeneralTab::getWidth()
{
	int total = 0;
	for (int i = 0; i < m_cols; i++) {
		total += m_maxw[i] + m_pxw;
	}
	return total;
}

bool GeneralTab::isSlicedVbi() const
{
	return m_vbiMethods && m_vbiMethods->currentText() == "Sliced";
}

CapMethod GeneralTab::capMethod()
{
	return (CapMethod)m_capMethods->itemData(m_capMethods->currentIndex()).toInt();
}

void GeneralTab::updateGUIInput(__u32 input)
{
	v4l2_input in;
	enum_input(in, true, input);
	if (g_input(input) || m_isRadio) {
		m_stackedFrameSettings->hide();
		return;
	}

	if ((in.capabilities & V4L2_IN_CAP_STD) && in.type == V4L2_INPUT_TYPE_TUNER) {
		m_stackedFrameSettings->setCurrentIndex(0);
		m_stackedFrameSettings->show();
		m_stackedStandards->setCurrentIndex(0);
		m_stackedStandards->show();
		m_stackedFrequency->setCurrentIndex(0);
		m_stackedFrequency->show();
	} else if (in.capabilities & V4L2_IN_CAP_STD) {
		m_stackedFrameSettings->setCurrentIndex(0);
		m_stackedFrameSettings->show();
		m_stackedStandards->setCurrentIndex(0);
		m_stackedStandards->show();
		m_stackedFrequency->hide();
	} else if (in.capabilities & V4L2_IN_CAP_DV_TIMINGS) {
		m_stackedFrameSettings->setCurrentIndex(0);
		m_stackedFrameSettings->show();
		m_stackedStandards->setCurrentIndex(1);
		m_stackedStandards->show();
		m_stackedFrequency->hide();
	} else	{
		m_stackedFrameSettings->setCurrentIndex(1);
		m_stackedFrameSettings->show();
		m_stackedStandards->hide();
		m_stackedFrequency->hide();
	}

	if (isVbi()) {
		m_stackedFrameSettings->hide();
	}
}

void GeneralTab::updateGUIOutput(__u32 output)
{
	v4l2_output out;
	enum_output(out, true, output);
	if (g_output(output) || m_isRadio) {
		m_stackedFrameSettings->hide();
		return;
	}

	if (out.capabilities & V4L2_OUT_CAP_STD) {
		m_stackedFrameSettings->setCurrentIndex(0);
		m_stackedFrameSettings->show();
		m_stackedStandards->setCurrentIndex(0);
		m_stackedStandards->show();
		m_stackedFrequency->hide();
	} else if (out.capabilities & V4L2_OUT_CAP_DV_TIMINGS) {
		m_stackedFrameSettings->setCurrentIndex(0);
		m_stackedFrameSettings->show();
		m_stackedStandards->setCurrentIndex(1);
		m_stackedStandards->show();
		m_stackedFrequency->hide();
	} else	{
		m_stackedFrameSettings->setCurrentIndex(1);
		m_stackedFrameSettings->show();
		m_stackedStandards->hide();
		m_stackedFrequency->hide();
	}

	if (isVbi()) {
		m_stackedFrameSettings->hide();
	}
}

void GeneralTab::inputChanged(int input)
{
	s_input((__u32)input);

	if (m_audioInput)
		updateAudioInput();

	updateVideoInput();
	updateVidCapFormat();
	updateGUIInput(input);
}

void GeneralTab::outputChanged(int output)
{
	s_output((__u32)output);

	if (m_audioOutput)
		updateAudioOutput();

	updateVideoOutput();
	updateVidOutFormat();
	updateGUIOutput(output);
}

void GeneralTab::inputAudioChanged(int input)
{
	s_audio((__u32)input);
	updateAudioInput();
}

void GeneralTab::outputAudioChanged(int output)
{
	s_audout((__u32)output);
	updateAudioOutput();
}

void GeneralTab::standardChanged(int std)
{
	v4l2_standard vs;

	enum_std(vs, true, std);
	s_std(vs.id);
	updateStandard();
}

void GeneralTab::timingsChanged(int index)
{
	v4l2_enum_dv_timings timings;

	enum_dv_timings(timings, true, index);
	s_dv_timings(timings.timings);
	updateTimings();
}

void GeneralTab::freqTableChanged(int)
{
	updateFreqChannel();
	freqChannelChanged(0);
}

void GeneralTab::freqChannelChanged(int idx)
{
	double f = v4l2_channel_lists[m_freqTable->currentIndex()].list[idx].freq;

	m_freq->setValue(f / 1000.0);
	freqChanged(m_freq->value());
}

void GeneralTab::freqChanged(double f)
{
	v4l2_frequency freq;

	if (!m_freq->isEnabled())
		return;

	g_frequency(freq);
	freq.frequency = f * m_freqFac;
	s_frequency(freq);
	updateFreq();
}

void GeneralTab::freqRfChanged(double f)
{
	v4l2_frequency freq;

	if (!m_freqRf->isEnabled())
		return;

	g_frequency(freq, 1);
	freq.frequency = f * m_freqRfFac;
	s_frequency(freq);
	updateFreqRf();
}

void GeneralTab::audioModeChanged(int)
{
	m_tuner.audmode = m_audioModes[m_audioMode->currentIndex()];
	s_tuner(m_tuner);
}

void GeneralTab::detectSubchansClicked()
{
	QString chans;

	g_tuner(m_tuner);
	if (m_tuner.rxsubchans & V4L2_TUNER_SUB_MONO)
		chans += "Mono ";
	if (m_tuner.rxsubchans & V4L2_TUNER_SUB_STEREO)
		chans += "Stereo ";
	if (m_tuner.rxsubchans & V4L2_TUNER_SUB_LANG1)
		chans += "Lang1 ";
	if (m_tuner.rxsubchans & V4L2_TUNER_SUB_LANG2)
		chans += "Lang2 ";
	if (m_tuner.rxsubchans & V4L2_TUNER_SUB_RDS)
		chans += "RDS ";
	chans += "(" + QString::number((int)(m_tuner.signal / 655.35 + 0.5)) + "%";
	if (m_tuner.signal && m_tuner.afc)
		chans += m_tuner.afc < 0 ? " too low" : " too high";
	chans += ")";

	m_subchannels->setText(chans);
	fixWidth();
}

void GeneralTab::stereoModeChanged()
{
	v4l2_modulator mod;
	bool val = m_stereoMode->checkState() == Qt::Checked;

	g_modulator(mod);
	mod.txsubchans &= ~(V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO);
	mod.txsubchans |= val ? V4L2_TUNER_SUB_STEREO : V4L2_TUNER_SUB_MONO;
	s_modulator(mod);
}

void GeneralTab::rdsModeChanged()
{
	v4l2_modulator mod;
	bool val = m_rdsMode->checkState() == Qt::Checked;

	g_modulator(mod);
	mod.txsubchans &= ~V4L2_TUNER_SUB_RDS;
	mod.txsubchans |= val ? V4L2_TUNER_SUB_RDS : 0;
	s_modulator(mod);
}

void GeneralTab::colorspaceChanged(int idx)
{
	cv4l_fmt fmt;

	g_fmt(fmt);
	fmt.s_colorspace(m_colorspace->itemData(idx).toInt());
	fmt.s_xfer_func(m_xferFunc->itemData(m_xferFunc->currentIndex()).toInt());
	fmt.s_ycbcr_enc(m_ycbcrEnc->itemData(m_ycbcrEnc->currentIndex()).toInt());
	fmt.s_quantization(m_quantRange->itemData(m_quantRange->currentIndex()).toInt());
	if (try_fmt(fmt) == 0)
		s_fmt(fmt);
	updateVidFormat();
}

void GeneralTab::xferFuncChanged(int idx)
{
	cv4l_fmt fmt;

	g_fmt(fmt);
	fmt.s_colorspace(m_colorspace->itemData(m_colorspace->currentIndex()).toInt());
	fmt.s_xfer_func(m_xferFunc->itemData(idx).toInt());
	fmt.s_ycbcr_enc(m_ycbcrEnc->itemData(m_ycbcrEnc->currentIndex()).toInt());
	fmt.s_quantization(m_quantRange->itemData(m_quantRange->currentIndex()).toInt());
	if (try_fmt(fmt) == 0)
		s_fmt(fmt);
	updateVidFormat();
}

void GeneralTab::ycbcrEncChanged(int idx)
{
	cv4l_fmt fmt;

	g_fmt(fmt);
	fmt.s_colorspace(m_colorspace->itemData(m_colorspace->currentIndex()).toInt());
	fmt.s_xfer_func(m_xferFunc->itemData(m_xferFunc->currentIndex()).toInt());
	fmt.s_ycbcr_enc(m_ycbcrEnc->itemData(idx).toInt());
	fmt.s_quantization(m_quantRange->itemData(m_quantRange->currentIndex()).toInt());
	if (try_fmt(fmt) == 0)
		s_fmt(fmt);
	updateVidFormat();
}

void GeneralTab::quantRangeChanged(int idx)
{
	cv4l_fmt fmt;

	g_fmt(fmt);
	fmt.s_colorspace(m_colorspace->itemData(m_colorspace->currentIndex()).toInt());
	fmt.s_xfer_func(m_xferFunc->itemData(m_xferFunc->currentIndex()).toInt());
	fmt.s_ycbcr_enc(m_ycbcrEnc->itemData(m_ycbcrEnc->currentIndex()).toInt());
	fmt.s_quantization(m_quantRange->itemData(idx).toInt());
	if (try_fmt(fmt) == 0)
		s_fmt(fmt);
	updateVidFormat();
}

void GeneralTab::clearColorspace(cv4l_fmt &fmt)
{
	if (m_colorspace->currentIndex() == 0)
		fmt.s_colorspace(V4L2_COLORSPACE_DEFAULT);
	if (m_xferFunc->currentIndex() == 0)
		fmt.s_xfer_func(V4L2_XFER_FUNC_DEFAULT);
	if (m_ycbcrEnc->currentIndex() == 0)
		fmt.s_ycbcr_enc(V4L2_YCBCR_ENC_DEFAULT);
	if (m_quantRange->currentIndex() == 0)
		fmt.s_quantization(V4L2_QUANTIZATION_DEFAULT);
}

void GeneralTab::vidCapFormatChanged(int idx)
{
	v4l2_fmtdesc desc;

	enum_fmt(desc, true, idx);

	cv4l_fmt fmt;

	g_fmt(fmt);
	fmt.s_pixelformat(desc.pixelformat);
	clearColorspace(fmt);
	if (try_fmt(fmt) == 0)
		s_fmt(fmt);

	updateVidCapFormat();
}

static const char *field2s(int val)
{
	switch (val) {
	case V4L2_FIELD_ANY:
		return "Any";
	case V4L2_FIELD_NONE:
		return "None";
	case V4L2_FIELD_TOP:
		return "Top";
	case V4L2_FIELD_BOTTOM:
		return "Bottom";
	case V4L2_FIELD_INTERLACED:
		return "Interlaced";
	case V4L2_FIELD_SEQ_TB:
		return "Sequential Top-Bottom";
	case V4L2_FIELD_SEQ_BT:
		return "Sequential Bottom-Top";
	case V4L2_FIELD_ALTERNATE:
		return "Alternating";
	case V4L2_FIELD_INTERLACED_TB:
		return "Interlaced Top-Bottom";
	case V4L2_FIELD_INTERLACED_BT:
		return "Interlaced Bottom-Top";
	default:
		return "";
	}
}

void GeneralTab::vidFieldChanged(int idx)
{
	cv4l_fmt fmt;

	g_fmt(fmt);
	for (__u32 f = V4L2_FIELD_NONE; f <= V4L2_FIELD_INTERLACED_BT; f++) {
		if (m_vidFields->currentText() == QString(field2s(f))) {
			fmt.s_field(f);
			clearColorspace(fmt);
			s_fmt(fmt);
			break;
		}
	}
	updateVidFormat();
}

void GeneralTab::frameWidthChanged()
{
	cv4l_fmt fmt;
	int val = m_frameWidth->value();

	if (m_frameWidth->isEnabled()) {
		g_fmt(fmt);
		fmt.s_width(val);
		clearColorspace(fmt);
		if (try_fmt(fmt) == 0)
			s_fmt(fmt);
	}

	updateVidFormat();
}

void GeneralTab::frameHeightChanged()
{
	cv4l_fmt fmt;
	int val = m_frameHeight->value();

	if (m_frameHeight->isEnabled()) {
		g_fmt(fmt);
		fmt.s_height(val);
		clearColorspace(fmt);
		if (try_fmt(fmt) == 0)
			s_fmt(fmt);
	}

	updateVidFormat();
}

void GeneralTab::frameSizeChanged(int idx)
{
	v4l2_frmsizeenum frmsize = { 0 };

	if (!enum_framesizes(frmsize, m_pixelformat, idx)) {
		cv4l_fmt fmt;

		g_fmt(fmt);
		fmt.s_width(frmsize.discrete.width);
		fmt.s_height(frmsize.discrete.height);
		clearColorspace(fmt);
		if (try_fmt(fmt) == 0)
			s_fmt(fmt);
	}
	updateVidFormat();
}

void GeneralTab::frameIntervalChanged(int idx)
{
	v4l2_frmivalenum frmival = { 0 };

	if (!enum_frameintervals(frmival, m_pixelformat, m_width, m_height, idx)
	    && frmival.type == V4L2_FRMIVAL_TYPE_DISCRETE) {
		if (!set_interval(frmival.discrete))
			m_interval = frmival.discrete;
	}
}

void GeneralTab::vidOutFormatChanged(int idx)
{
	v4l2_fmtdesc desc;

	enum_fmt(desc, true, idx);

	cv4l_fmt fmt;

	g_fmt(fmt);
	fmt.s_pixelformat(desc.pixelformat);
	clearColorspace(fmt);
	if (try_fmt(fmt) == 0)
		s_fmt(fmt);
	updateVidOutFormat();
}

void GeneralTab::vbiMethodsChanged(int idx)
{
	if (isSlicedVbi())
		s_type(m_isOutput ? V4L2_BUF_TYPE_SLICED_VBI_OUTPUT :
				    V4L2_BUF_TYPE_SLICED_VBI_CAPTURE);
	else
		s_type(m_isOutput ? V4L2_BUF_TYPE_VBI_OUTPUT :
				    V4L2_BUF_TYPE_VBI_CAPTURE);
	cv4l_fmt fmt;

	g_fmt(fmt);
	s_fmt(fmt);
}

void GeneralTab::cropChanged()
{
	v4l2_selection sel = { 0 };

	if (!m_cropWidth->isEnabled() || !cur_io_has_crop())
		return;

	sel.type = g_selection_type();
	sel.target = V4L2_SEL_TGT_CROP;
	sel.r.width = m_cropWidth->value();
	sel.r.left = m_cropLeft->value();
	sel.r.height = m_cropHeight->value();
	sel.r.top = m_cropTop->value();
	s_selection(sel);
	updateVidFormat();
}

void GeneralTab::composeChanged()
{
	v4l2_selection sel = { 0 };

	if (!m_composeWidth->isEnabled() || !cur_io_has_compose())
		return;

	sel.type = g_selection_type();
	sel.target = V4L2_SEL_TGT_COMPOSE;
	sel.r.width = m_composeWidth->value();
	sel.r.left = m_composeLeft->value();
	sel.r.height = m_composeHeight->value();
	sel.r.top = m_composeTop->value();
	s_selection(sel);
	updateVidFormat();
}

void GeneralTab::updateVideoInput()
{
	__u32 input;
	v4l2_input in;

	if (g_input(input))
		return;
	enum_input(in, true, input);
	m_videoInput->setCurrentIndex(input);
	m_isSDTV = false;
	if (m_tvStandard) {
		refreshStandards();
		updateStandard();
		m_tvStandard->setEnabled(in.capabilities & V4L2_IN_CAP_STD);
		if (m_qryStandard)
			m_qryStandard->setEnabled(in.capabilities & V4L2_IN_CAP_STD);
		if (in.capabilities & V4L2_IN_CAP_STD)
			m_isSDTV = true;
		bool enableFreq = in.type == V4L2_INPUT_TYPE_TUNER;
		if (m_freq)
			m_freq->setEnabled(enableFreq);
		if (m_freqTable)
			m_freqTable->setEnabled(enableFreq);
		if (m_freqChannel)
			m_freqChannel->setEnabled(enableFreq);
		if (m_detectSubchans) {
			m_detectSubchans->setEnabled(enableFreq);
			if (!enableFreq) {
				m_subchannels->setText("");
				fixWidth();
			}
			else
				detectSubchansClicked();
		}
	}
	if (m_videoTimings) {
		refreshTimings();
		updateTimings();
		m_videoTimings->setEnabled(in.capabilities & V4L2_IN_CAP_DV_TIMINGS);
		if (m_qryTimings)
			m_qryTimings->setEnabled(in.capabilities & V4L2_IN_CAP_DV_TIMINGS);
	}
	if (m_audioInput)
		m_audioInput->setEnabled(in.audioset);
	if (m_cropWidth) {
		bool has_crop = cur_io_has_crop();

		m_cropWidth->setEnabled(has_crop);
		m_cropLeft->setEnabled(has_crop);
		m_cropHeight->setEnabled(has_crop);
		m_cropTop->setEnabled(has_crop);
	}
	if (m_composeWidth) {
		bool has_compose = cur_io_has_compose();

		m_composeWidth->setEnabled(has_compose);
		m_composeLeft->setEnabled(has_compose);
		m_composeHeight->setEnabled(has_compose);
		m_composeTop->setEnabled(has_compose);
	}
}

void GeneralTab::updateVideoOutput()
{
	__u32 output;
	v4l2_output out;

	if (g_output(output))
		return;
	enum_output(out, true, output);
	m_videoOutput->setCurrentIndex(output);
	m_isSDTV = false;
	if (m_tvStandard) {
		refreshStandards();
		updateStandard();
		m_tvStandard->setEnabled(out.capabilities & V4L2_OUT_CAP_STD);
		if (m_qryStandard)
			m_qryStandard->setEnabled(out.capabilities & V4L2_OUT_CAP_STD);
		if (out.capabilities & V4L2_OUT_CAP_STD)
			m_isSDTV = true;
	}
	if (m_videoTimings) {
		refreshTimings();
		updateTimings();
		m_videoTimings->setEnabled(out.capabilities & V4L2_OUT_CAP_DV_TIMINGS);
	}
	if (m_audioOutput)
		m_audioOutput->setEnabled(out.audioset);
	if (m_cropWidth) {
		bool has_crop = cur_io_has_crop();

		m_cropWidth->setEnabled(has_crop);
		m_cropLeft->setEnabled(has_crop);
		m_cropHeight->setEnabled(has_crop);
		m_cropTop->setEnabled(has_crop);
	}
	if (m_composeWidth) {
		bool has_compose = cur_io_has_compose();

		m_composeWidth->setEnabled(has_compose);
		m_composeLeft->setEnabled(has_compose);
		m_composeHeight->setEnabled(has_compose);
		m_composeTop->setEnabled(has_compose);
	}
	g_mw->updateLimRGBRange();
}

void GeneralTab::updateAudioInput()
{
	v4l2_audio audio;
	QString what;

	g_audio(audio);
	m_audioInput->setCurrentIndex(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";
	m_audioInput->setStatusTip(what);
	m_audioInput->setWhatsThis(what);
}

void GeneralTab::updateAudioOutput()
{
	v4l2_audioout audio;

	g_audout(audio);
	m_audioOutput->setCurrentIndex(audio.index);
}

void GeneralTab::refreshStandards()
{
	v4l2_standard vs;
	m_tvStandard->clear();
	if (!enum_std(vs, true)) {
		do {
			m_tvStandard->addItem((char *)vs.name);
		} while (!enum_std(vs));
	}
}

void GeneralTab::updateStandard()
{
	v4l2_std_id std;
	v4l2_standard vs;
	QString what;

	if (g_std(std))
		return;
	if (enum_std(vs, true))
		return;
	do {
		if (vs.id == std)
			break;
	} while (!enum_std(vs));
	if (vs.id != std) {
		if (!enum_std(vs, true)) {
			do {
				if (vs.id & std)
					break;
			} while (!enum_std(vs));
		}
	}
	if ((vs.id & std) == 0)
		return;
	m_tvStandard->setCurrentIndex(vs.index);
	what.sprintf("TV Standard (0x%llX)\n"
		"Frame period: %f (%d/%d)\n"
		"Frame lines: %d", (long long int)std,
		(double)vs.frameperiod.numerator / vs.frameperiod.denominator,
		vs.frameperiod.numerator, vs.frameperiod.denominator,
		vs.framelines);
	m_tvStandard->setStatusTip(what);
	m_tvStandard->setWhatsThis(what);
	updateVidFormat();
	if (!isVbi() && !m_isOutput)
		changePixelAspectRatio();
}

void GeneralTab::qryStdClicked()
{
	v4l2_std_id std;

	if (query_std(std))
		return;

	if (std == V4L2_STD_UNKNOWN) {
		info("No standard detected\n");
	} else {
		s_std(std);
		updateStandard();
	}
}

void GeneralTab::refreshTimings()
{
	v4l2_enum_dv_timings timings;
	m_videoTimings->clear();
	if (!enum_dv_timings(timings, true)) {
		do {
			v4l2_bt_timings &bt = timings.timings.bt;
			double tot_height = bt.height +
				bt.vfrontporch + bt.vsync + bt.vbackporch +
				bt.il_vfrontporch + bt.il_vsync + bt.il_vbackporch;
			double tot_width = bt.width +
				bt.hfrontporch + bt.hsync + bt.hbackporch;
			char buf[100];

			if (bt.interlaced)
				sprintf(buf, "%dx%di%.2f", bt.width, bt.height,
					(double)bt.pixelclock / (tot_width * (tot_height / 2)));
			else
				sprintf(buf, "%dx%dp%.2f", bt.width, bt.height,
					(double)bt.pixelclock / (tot_width * tot_height));
			m_videoTimings->addItem(buf);
		} while (!enum_dv_timings(timings));
	}
}

void GeneralTab::updateTimings()
{
	v4l2_dv_timings timings;
	v4l2_enum_dv_timings p;
	QString what;

	if (g_dv_timings(timings))
		return;
	if (enum_dv_timings(p, true))
		return;
	do {
		if (!memcmp(&timings, &p.timings, sizeof(timings)))
			break;
	} while (!enum_dv_timings(p));
	if (memcmp(&timings, &p.timings, sizeof(timings)))
		return;
	m_videoTimings->setCurrentIndex(p.index);
	what.sprintf("Video Timings (%u)\n"
		"Frame %ux%u\n",
		p.index, p.timings.bt.width, p.timings.bt.height);
	m_isSDTV = p.timings.bt.width <= 720 && p.timings.bt.height <= 576;
	m_videoTimings->setStatusTip(what);
	m_videoTimings->setWhatsThis(what);
	updateVidFormat();
	g_mw->updateLimRGBRange();
}

void GeneralTab::qryTimingsClicked()
{
	v4l2_dv_timings timings;
	int err = query_dv_timings(timings);

	switch (err) {
	case ENOLINK:
		info("No signal found\n");
		break;
	case ENOLCK:
		info("Could not lock to signal\n");
		break;
	case ERANGE:
		info("Frequency out of range\n");
		break;
	case 0:
		s_dv_timings(timings);
		updateTimings();
		break;
	default:
		error(err);
		break;
	}
}

void GeneralTab::sourceChange(const v4l2_event &ev)
{
	if (!m_videoInput || (int)ev.id != m_videoInput->currentIndex())
		return;
	if (m_qryStandard && m_qryStandard->isEnabled())
		m_qryStandard->click();
	else if (m_qryTimings && m_qryTimings->isEnabled())
		m_qryTimings->click();
	if (has_vid_cap() || has_vid_out())
		updateColorspace();
}

void GeneralTab::updateFreq()
{
	v4l2_frequency f;

	g_frequency(f);
	/* m_freq listens to valueChanged block it to avoid recursion */
	m_freq->blockSignals(true);
	m_freq->setValue((double)f.frequency / m_freqFac);
	m_freq->blockSignals(false);
}

void GeneralTab::updateFreqChannel()
{
	m_freqChannel->clear();
	int tbl = m_freqTable->currentIndex();
	const struct v4l2_channel_list *list = v4l2_channel_lists[tbl].list;
	for (unsigned i = 0; i < v4l2_channel_lists[tbl].count; i++)
		m_freqChannel->addItem(list[i].name);
}

void GeneralTab::updateFreqRf()
{
	v4l2_frequency f;

	g_frequency(f, 1);
	/* m_freqRf listens to valueChanged block it to avoid recursion */
	m_freqRf->blockSignals(true);
	m_freqRf->setValue((double)f.frequency / m_freqRfFac);
	m_freqRf->blockSignals(false);
}

void GeneralTab::updateColorspace()
{
	cv4l_fmt fmt;
	int idx;

	g_fmt(fmt);
	idx = m_colorspace->findData(fmt.g_colorspace());
	if (m_colorspace->currentIndex())
		m_colorspace->setCurrentIndex(idx >= 0 ? idx : 0);
	idx = m_xferFunc->findData(fmt.g_xfer_func());
	if (m_xferFunc->currentIndex())
		m_xferFunc->setCurrentIndex(idx >= 0 ? idx : 0);
	idx = m_ycbcrEnc->findData(fmt.g_ycbcr_enc());
	if (m_ycbcrEnc->currentIndex())
		m_ycbcrEnc->setCurrentIndex(idx >= 0 ? idx : 0);
	idx = m_quantRange->findData(fmt.g_quantization());
	if (m_quantRange->currentIndex())
		m_quantRange->setCurrentIndex(idx >= 0 ? idx : 0);
	g_mw->updateColorspace();
}

void GeneralTab::updateVidCapFormat()
{
	v4l2_fmtdesc desc;
	cv4l_fmt fmt;

	if (isVbi())
		return;
	g_fmt(fmt);
	m_pixelformat = fmt.g_pixelformat();
	m_width = fmt.g_width();
	m_height = fmt.g_height();
	updateColorspace();
	updateFrameSize();
	updateFrameInterval();
	if (!enum_fmt(desc, true)) {
		do {
			if (desc.pixelformat == m_pixelformat)
				break;
		} while (!enum_fmt(desc));
	}
	if (desc.pixelformat != m_pixelformat)
		return;
	m_vidCapFormats->setCurrentIndex(desc.index);
	updateVidFields();
	updateCrop();
	updateCompose();
}

void GeneralTab::updateVidOutFormat()
{
	v4l2_fmtdesc desc;
	cv4l_fmt fmt;

	if (isVbi())
		return;
	g_fmt(fmt);
	m_pixelformat = fmt.g_pixelformat();
	m_width = fmt.g_width();
	m_height = fmt.g_height();
	updateColorspace();
	updateFrameSize();
	if (!enum_fmt(desc, true)) {
		do {
			if (desc.pixelformat == m_pixelformat)
				break;
		} while (!enum_fmt(desc));
	}
	if (desc.pixelformat != m_pixelformat)
		return;
	m_vidOutFormats->setCurrentIndex(desc.index);
	updateVidFields();
	updateCrop();
	updateCompose();
}

void GeneralTab::updateVidFields()
{
	cv4l_fmt fmt;
	cv4l_fmt tmp;
	bool first = true;

	g_fmt(fmt);

	for (__u32 f = V4L2_FIELD_NONE; f <= V4L2_FIELD_INTERLACED_BT; f++) {
		tmp = fmt;
		tmp.s_field(f);
		if (try_fmt(tmp) || tmp.g_field() != f)
			continue;
		if (first) {
			m_vidFields->clear();
			first = false;
		}
		m_vidFields->addItem(field2s(f));
		if (fmt.g_field() == f)
			m_vidFields->setCurrentIndex(m_vidFields->count() - 1);
	}
}

void GeneralTab::updateCrop()
{
	if (m_cropWidth == NULL || !m_cropWidth->isEnabled())
		return;

	v4l2_selection sel = { 0 };
	v4l2_rect &r = sel.r;
	v4l2_rect b = { 0, 0, m_width, m_height };

	sel.type = g_selection_type();
	if (sel.type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
		sel.target = V4L2_SEL_TGT_CROP_BOUNDS;
		if (g_selection(sel))
			return;
		b = sel.r;
	}
	sel.target = V4L2_SEL_TGT_CROP;
	if (g_selection(sel))
		return;

	m_cropWidth->blockSignals(true);
	m_cropLeft->blockSignals(true);
	m_cropHeight->blockSignals(true);
	m_cropTop->blockSignals(true);

	m_cropWidth->setRange(8, b.width);
	m_cropWidth->setSliderPosition(r.width);
	if (b.width != r.width) {
		m_cropLeft->setRange(b.left, b.left + b.width - r.width);
		m_cropLeft->setSliderPosition(r.left);
	}
	m_cropHeight->setRange(8, b.height);
	m_cropHeight->setSliderPosition(r.height);
	if (b.height != r.height) {
		m_cropTop->setRange(b.top, b.top + b.height - r.height);
		m_cropTop->setSliderPosition(r.top);
	}

	m_cropWidth->blockSignals(false);
	m_cropLeft->blockSignals(false);
	m_cropHeight->blockSignals(false);
	m_cropTop->blockSignals(false);
}

void GeneralTab::updateCompose()
{
	if (m_composeWidth == NULL || !m_composeWidth->isEnabled())
		return;

	v4l2_selection sel = { 0 };
	v4l2_rect &r = sel.r;
	v4l2_rect b = { 0, 0, m_width, m_height };

	sel.type = g_selection_type();
	if (sel.type == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
		sel.target = V4L2_SEL_TGT_COMPOSE_BOUNDS;
		if (g_selection(sel))
			return;
		b = sel.r;
	}
	sel.target = V4L2_SEL_TGT_COMPOSE;
	if (g_selection(sel))
		return;

	m_composeWidth->blockSignals(true);
	m_composeLeft->blockSignals(true);
	m_composeHeight->blockSignals(true);
	m_composeTop->blockSignals(true);

	m_composeWidth->setRange(8, b.width);
	m_composeWidth->setSliderPosition(r.width);
	if (b.width != r.width) {
		m_composeLeft->setRange(b.left, b.left + b.width - r.width);
		m_composeLeft->setSliderPosition(r.left);
	}
	m_composeHeight->setRange(8, b.height);
	m_composeHeight->setSliderPosition(r.height);
	if (b.height != r.height) {
		m_composeTop->setRange(b.top, b.top + b.height - r.height);
		m_composeTop->setSliderPosition(r.top);
	}

	m_composeWidth->blockSignals(false);
	m_composeLeft->blockSignals(false);
	m_composeHeight->blockSignals(false);
	m_composeTop->blockSignals(false);
	emit clearBuffers();
}

void GeneralTab::updateFrameSize()
{
	v4l2_frmsizeenum frmsize;
	bool ok = false;

	if (m_frameSize)
		m_frameSize->clear();

	ok = !enum_framesizes(frmsize, m_pixelformat);
	if (ok && frmsize.type == V4L2_FRMSIZE_TYPE_DISCRETE) {
		do {
			m_frameSize->addItem(QString("%1x%2")
				.arg(frmsize.discrete.width).arg(frmsize.discrete.height));
			if (frmsize.discrete.width == m_width &&
			    frmsize.discrete.height == m_height)
				m_frameSize->setCurrentIndex(frmsize.index);
		} while (!enum_framesizes(frmsize));

		m_discreteSizes = true;
		m_frameWidth->setEnabled(false);
		m_frameWidth->blockSignals(true);
		m_frameWidth->setMinimum(m_width);
		m_frameWidth->setMaximum(m_width);
		m_frameWidth->setValue(m_width);
		m_frameWidth->blockSignals(false);

		m_frameHeight->setEnabled(false);
		m_frameHeight->blockSignals(true);
		m_frameHeight->setMinimum(m_height);
		m_frameHeight->setMaximum(m_height);
		m_frameHeight->setValue(m_height);
		m_frameHeight->blockSignals(false);
		m_frameSize->setEnabled(!m_haveBuffers);
		updateFrameInterval();
		return;
	}
	if (!ok) {
		frmsize.stepwise.min_width = 8;
		frmsize.stepwise.max_width = 4096;
		frmsize.stepwise.step_width = 1;
		frmsize.stepwise.min_height = 8;
		frmsize.stepwise.max_height = 2160;
		frmsize.stepwise.step_height = 1;
	}
	m_discreteSizes = false;
	if (m_frameSize)
		m_frameSize->setEnabled(false);
	if (!m_frameWidth) {
		updateFrameInterval();
		return;
	}

	m_frameWidth->setEnabled(!m_haveBuffers);
	m_frameWidth->blockSignals(true);
	m_frameWidth->setMinimum(frmsize.stepwise.min_width);
	m_frameWidth->setMaximum(frmsize.stepwise.max_width);
	m_frameWidth->setSingleStep(frmsize.stepwise.step_width);
	m_frameWidth->setValue(m_width);
	m_frameWidth->blockSignals(false);

	m_frameHeight->setEnabled(!m_haveBuffers);
	m_frameHeight->blockSignals(true);
	m_frameHeight->setMinimum(frmsize.stepwise.min_height);
	m_frameHeight->setMaximum(frmsize.stepwise.max_height);
	m_frameHeight->setSingleStep(frmsize.stepwise.step_height);
	m_frameHeight->setValue(m_height);
	m_frameHeight->blockSignals(false);
	updateFrameInterval();
}

CropMethod GeneralTab::getCropMethod()
{
	switch (m_cropping->currentIndex()) {
	case 1:
		return QV4L2_CROP_TB;
	case 2:
		return QV4L2_CROP_P43;
	case 3:
		return QV4L2_CROP_W149;
	case 4:
		return QV4L2_CROP_W169;
	case 5:
		return QV4L2_CROP_C185;
	case 6:
		return QV4L2_CROP_C239;
	default:
		return QV4L2_CROP_NONE;
	}
}

void GeneralTab::changePixelAspectRatio()
{
	// Update hints by calling a get
	getPixelAspectRatio();
	info("");
	emit pixelAspectRatioChanged();
}

double GeneralTab::getPixelAspectRatio()
{
	v4l2_fract ratio = { 1, 1 };
	unsigned w = 0, h = 0;

	ratio = g_pixel_aspect(w, h);
	switch (m_pixelAspectRatio->currentIndex()) {
	// override ratio if hardcoded, but keep w and h
	case 1:
		ratio.numerator = 1;
		ratio.denominator = 1;
		break;
	case 2:
		ratio.numerator = 11;
		ratio.denominator = 10;
		break;
	case 3:
		ratio.numerator = 33;
		ratio.denominator = 40;
		break;
	case 4:
		ratio.numerator = 54;
		ratio.denominator = 59;
		break;
	case 5:
		ratio.numerator = 81;
		ratio.denominator = 118;
		break;
	default:
		break;
	}

	m_pixelAspectRatio->setWhatsThis(QString("Pixel Aspect Ratio y:x = %1:%2")
			 .arg(ratio.numerator).arg(ratio.denominator));
	m_pixelAspectRatio->setStatusTip(m_pixelAspectRatio->whatsThis());

	cv4l_fmt fmt;
	unsigned cur_width, cur_height;
	unsigned cur_field;

	g_fmt(fmt);

	cur_width = fmt.g_width();
	cur_height = fmt.g_height();
	cur_field = fmt.g_field();
	if (w == 0)
		w = cur_width;
	if (cur_field == V4L2_FIELD_TOP ||
	    cur_field == V4L2_FIELD_BOTTOM ||
	    cur_field == V4L2_FIELD_ALTERNATE) {
		// If we only capture a single field, then each pixel is twice
		// as high and the default image height is half the reported
		// height.
		ratio.numerator *= 2;
		h /= 2;
	}
	if (h == 0)
		h = cur_height;

	// Note: ratio is y / x, whereas we want x / y, so we return
	// denominator / numerator.
	// In addition, the ratio is for the unscaled image (i.e., the default
	// image rectangle as returned by VIDIOC_CROPCAP). So we have to
	// compensate for the current scaling factor.
	return (((double)ratio.denominator * w) / cur_width) /
	       (((double)ratio.numerator * h) / cur_height);
}

void GeneralTab::updateFrameInterval()
{
	v4l2_frmivalenum frmival = { 0 };
	v4l2_fract curr = { 1, 1 };
	bool curr_ok, ok;

	if (m_frameInterval == NULL)
		return;

	m_frameInterval->clear();

	ok = !enum_frameintervals(frmival, m_pixelformat, m_width, m_height);
	m_has_interval = ok && frmival.type == V4L2_FRMIVAL_TYPE_DISCRETE;
	m_frameInterval->setEnabled(m_has_interval);
	if (m_has_interval) {
	        m_interval = frmival.discrete;
        	curr_ok = !m_fd->get_interval(curr);
		do {
			m_frameInterval->addItem(QString("%1 fps")
				.arg((double)frmival.discrete.denominator / frmival.discrete.numerator));
			if (curr_ok &&
			    frmival.discrete.numerator == curr.numerator &&
			    frmival.discrete.denominator == curr.denominator) {
				m_frameInterval->setCurrentIndex(frmival.index);
				m_interval = frmival.discrete;
                        }
		} while (!enum_frameintervals(frmival));
	}
}

bool GeneralTab::get_interval(struct v4l2_fract &interval)
{
	if (m_has_interval)
		interval = m_interval;

	return m_has_interval;
}

QString GeneralTab::getAudioInDevice()
{
	if (m_audioInDevice == NULL)
		return NULL;

	return m_audioInDeviceMap[m_audioInDevice->currentIndex()];
}

QString GeneralTab::getAudioOutDevice()
{
	if (m_audioOutDevice == NULL)
		return NULL;

	return m_audioOutDeviceMap[m_audioOutDevice->currentIndex()];
}

void GeneralTab::setAudioDeviceBufferSize(int size)
{
	m_audioDeviceBufferSize = size;
}

int GeneralTab::getAudioDeviceBufferSize()
{
	return m_audioDeviceBufferSize;
}

#ifdef HAVE_ALSA
int GeneralTab::checkMatchAudioDevice(void *md, const char *vid, enum device_type type)
{
	const char *devname = NULL;
	enum device_type dtype = isRadio() ? MEDIA_V4L_RADIO : MEDIA_V4L_VIDEO;

	while ((devname = get_associated_device(md, devname, type, vid, dtype)) != NULL) {
		if (type == MEDIA_SND_CAP) {
			QStringList devAddr = QString(devname).split(QRegExp("[:,]"));
			return devAddr.value(1).toInt();
		}
	}
	return -1;
}

int GeneralTab::matchAudioDevice()
{
	QStringList devPath = m_device.split("/");
	QString curDev = devPath.value(devPath.count() - 1);
	void *media;
	int match;

	media = discover_media_devices();

	if ((match = checkMatchAudioDevice(media, curDev.toLatin1(), MEDIA_SND_CAP)) != -1)
		return match;
	return -1;
}
#endif

bool GeneralTab::hasAlsaAudio()
{
#ifdef HAVE_ALSA
	return !isVbi();
#else
	return false;
#endif
}
