Save camera video res in settings

Fixes #1033

src/misc/settings.cpp

@@ -204,6 +204,10 @@ void Settings::load()
         filterAudio = s.value("filterAudio", false).toBool();
     s.endGroup();
 
+    s.beginGroup("Video");
+        camVideoRes = s.value("camVideoRes",QSize()).toSize();
+    s.endGroup();
+
     // Read the embedded DHT bootsrap nodes list if needed
     if (dhtServerList.isEmpty())
     {
@@ -350,6 +354,10 @@ void Settings::save(QString path, bool writeFriends)
         s.setValue("filterAudio", filterAudio);
     s.endGroup();
 
+    s.beginGroup("Video");
+        s.setValue("camVideoRes",camVideoRes);
+    s.endGroup();
+
     if (!writeFriends || currentProfile.isEmpty()) // Core::switchConfiguration
         return;
 
@@ -940,6 +948,16 @@ void Settings::setFilterAudio(bool newValue)
     filterAudio = newValue;
 }
 
+QSize Settings::getCamVideoRes() const
+{
+    return camVideoRes;
+}
+
+void Settings::setCamVideoRes(QSize newValue)
+{
+    camVideoRes = newValue;
+}
+
 QString Settings::getFriendAdress(const QString &publicKey) const
 {
     QString key = ToxID::fromString(publicKey).publicKey;

src/misc/settings.h

@@ -139,6 +139,9 @@ public:
     bool getFilterAudio() const;
     void setFilterAudio(bool newValue);
 
+    QSize getCamVideoRes() const;
+    void setCamVideoRes(QSize newValue);
+
     // Assume all widgets have unique names
     // Don't use it to save every single thing you want to save, use it
     // for some general purpose widgets, such as MainWindows or Splitters,
@@ -317,6 +320,9 @@ private:
     QString outDev;
     bool filterAudio;
 
+    // Video
+    QSize camVideoRes;
+
     struct friendProp
     {
         QString alias;

src/widget/form/settings/avform.cpp

@@ -95,7 +95,9 @@ void AVForm::on_HueSlider_sliderMoved(int position)
 
 void AVForm::on_videoModescomboBox_currentIndexChanged(int index)
 {
-    Camera::getInstance()->setResolution(bodyUI->videoModescomboBox->itemData(index).toSize());
+    QSize res = bodyUI->videoModescomboBox->itemData(index).toSize();
+    Settings::getInstance().setCamVideoRes(res);
+    Camera::getInstance()->setResolution(res);
 }
 
 void AVForm::onPropProbingFinished(Camera::Prop prop, double val)
@@ -121,15 +123,25 @@ void AVForm::onPropProbingFinished(Camera::Prop prop, double val)
 
 void AVForm::onResProbingFinished(QList<QSize> res)
 {
+    QSize savedRes = Settings::getInstance().getCamVideoRes();
+    int savedResIndex = -1;
     bodyUI->videoModescomboBox->clear();
 	bodyUI->videoModescomboBox->blockSignals(true);
-    for (QSize r : res)
+    for (int i=0; i<res.size(); ++i)
+    {
+        QSize& r = res[i];
         bodyUI->videoModescomboBox->addItem(QString("%1x%2").arg(QString::number(r.width()),QString::number(r.height())), r);
-	//reset index, otherwise cameras with only one resolution won't get initialized
+        if (r == savedRes)
+            savedResIndex = i;
+    }
+    //reset index, otherwise cameras with only one resolution won't get initialized
     bodyUI->videoModescomboBox->setCurrentIndex(-1);
     bodyUI->videoModescomboBox->blockSignals(false);
 
-    bodyUI->videoModescomboBox->setCurrentIndex(bodyUI->videoModescomboBox->count()-1);
+    if (savedResIndex != -1)
+        bodyUI->videoModescomboBox->setCurrentIndex(savedResIndex);
+    else
+        bodyUI->videoModescomboBox->setCurrentIndex(bodyUI->videoModescomboBox->count()-1);
 }
 
 void AVForm::hideEvent(QHideEvent *)