From bf26c5c5946b4e0a9ae91e020cbc33720e545675 Mon Sep 17 00:00:00 2001
From: Hans Verkuil <hans.verkuil@cisco.com>
Date: Sun, 10 Jun 2012 11:25:35 +0200
Subject: [PATCH] qv4l2: add channel detection.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
---
 utils/qv4l2/general-tab.cpp | 30 ++++++++++++++++++++++++++++++
 utils/qv4l2/general-tab.h   |  3 +++
 2 files changed, 33 insertions(+)

diff --git a/utils/qv4l2/general-tab.cpp b/utils/qv4l2/general-tab.cpp
index a68d9aa..784d19c 100644
--- a/utils/qv4l2/general-tab.cpp
+++ b/utils/qv4l2/general-tab.cpp
@@ -227,6 +227,12 @@ GeneralTab::GeneralTab(const QString &device, v4l2 &fd, int n, QWidget *parent)
 			if (m_audioModes[i] == m_tuner.audmode)
 				m_audioMode->setCurrentIndex(i);
 		connect(m_audioMode, SIGNAL(activated(int)), SLOT(audioModeChanged(int)));
+		m_subchannels = new QLabel("", parent);
+		addWidget(m_subchannels, Qt::AlignRight);
+		m_detectSubchans = new QPushButton("Refresh Tuner Status", parent);
+		addWidget(m_detectSubchans);
+		connect(m_detectSubchans, SIGNAL(clicked()), SLOT(detectSubchansClicked()));
+		detectSubchansClicked();
 	}
 
 	if (isRadio())
@@ -416,6 +422,30 @@ void GeneralTab::audioModeChanged(int)
 	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.afc < 0)
+		chans += " too low";
+	else if (m_tuner.afc > 0)
+		chans += " too high";
+	chans += ")";
+	m_subchannels->setText(chans);
+}
+
 void GeneralTab::vidCapFormatChanged(int idx)
 {
 	v4l2_fmtdesc desc;
diff --git a/utils/qv4l2/general-tab.h b/utils/qv4l2/general-tab.h
index aa1b8c4..8805ed7 100644
--- a/utils/qv4l2/general-tab.h
+++ b/utils/qv4l2/general-tab.h
@@ -60,6 +60,7 @@ private slots:
 	void freqChannelChanged(int);
 	void freqChanged();
 	void audioModeChanged(int);
+	void detectSubchansClicked();
 	void vidCapFormatChanged(int);
 	void frameWidthChanged();
 	void frameHeightChanged();
@@ -126,6 +127,8 @@ private:
 	QComboBox *m_freqTable;
 	QComboBox *m_freqChannel;
 	QComboBox *m_audioMode;
+	QLabel *m_subchannels;
+	QPushButton *m_detectSubchans;
 	QComboBox *m_vidCapFormats;
 	QComboBox *m_frameSize;
 	QSpinBox *m_frameWidth;
-- 
2.7.4