feat(settings): make audio quality setting persistent

src/core/coreav.cpp

@@ -48,9 +48,6 @@
  * @brief Sent when a call was ended by the peer.
  * @param friendId Id of friend in call list.
  *
- * @var CoreAV::audioBitrate
- * @brief In kb/s. More than enough for Opus.
- *
  * @var CoreAV::VIDEO_DEFAULT_BITRATE
  * @brief Picked at random by fair dice roll.
  */
@@ -236,7 +233,7 @@ bool CoreAV::answerCall(uint32_t friendNum)
     qDebug() << QString("answering call %1").arg(friendNum);
     assert(calls.contains(friendNum));
     TOXAV_ERR_ANSWER err;
-    if (toxav_answer(toxav, friendNum, audioBitrate, VIDEO_DEFAULT_BITRATE, &err)) {
+    if (toxav_answer(toxav, friendNum, Settings::getInstance().getAudioBitrate(), VIDEO_DEFAULT_BITRATE, &err)) {
         calls[friendNum].inactive = false;
         return true;
     } else {
@@ -271,7 +268,7 @@ bool CoreAV::startCall(uint32_t friendNum, bool video)
     }
 
     uint32_t videoBitrate = video ? VIDEO_DEFAULT_BITRATE : 0;
-    if (!toxav_call(toxav, friendNum, audioBitrate, videoBitrate, nullptr))
+    if (!toxav_call(toxav, friendNum, Settings::getInstance().getAudioBitrate(), videoBitrate, nullptr))
         return false;
 
     auto call = calls.insert({friendNum, video, *this});

src/core/coreav.h

@@ -81,7 +81,6 @@ public:
                                   uint8_t channels, unsigned sample_rate, void* core);
     static void invalidateGroupCallPeerSource(int group, int peer);
 
-    uint32_t audioBitrate = 64;
 public slots:
     bool startCall(uint32_t friendNum, bool video = false);
     bool answerCall(uint32_t friendNum);

src/persistence/settings.cpp

@@ -265,6 +265,7 @@ void Settings::loadGlobal()
         audioOutDevEnabled = s.value("audioOutDevEnabled", true).toBool();
         audioInGainDecibel = s.value("inGain", 0).toReal();
         outVolume = s.value("outVolume", 100).toInt();
+        audioBitrate = s.value("audioBitrate", 64).toInt();
         enableBackend2 = false;
         #ifdef USE_FILTERAUDIO
         enableBackend2 = s.value("enableBackend2", false).toBool();
@@ -566,6 +567,7 @@ void Settings::saveGlobal()
         s.setValue("audioOutDevEnabled", audioOutDevEnabled);
         s.setValue("inGain", audioInGainDecibel);
         s.setValue("outVolume", outVolume);
+        s.setValue("audioBitrate", audioBitrate);
         s.setValue("enableBackend2", enableBackend2);
     }
     s.endGroup();
@@ -1882,6 +1884,22 @@ void Settings::setOutVolume(int volume)
     }
 }
 
+int Settings::getAudioBitrate() const
+{
+    QMutexLocker locker{&bigLock};
+    return audioBitrate;
+}
+
+void Settings::setAudioBitrate(int bitrate)
+{
+    QMutexLocker locker{&bigLock};
+
+    if (bitrate != audioBitrate) {
+        audioBitrate = bitrate;
+        emit audioBitrateChanged(audioBitrate);
+    }
+}
+
 bool Settings::getEnableBackend2() const
 {
     QMutexLocker locker{&bigLock};

src/persistence/settings.h

@@ -101,6 +101,7 @@ class Settings : public QObject
     Q_PROPERTY(bool audioOutDevEnabled READ getAudioOutDevEnabled WRITE setAudioOutDevEnabled NOTIFY
                    audioOutDevEnabledChanged FINAL)
     Q_PROPERTY(int outVolume READ getOutVolume WRITE setOutVolume NOTIFY outVolumeChanged FINAL)
+    Q_PROPERTY(int audioBitrate READ getAudioBitrate WRITE setAudioBitrate NOTIFY audioBitrateChanged FINAL)
     Q_PROPERTY(bool enableBackend2 READ getEnableBackend2 WRITE setEnableBackend2 NOTIFY
                    enableBackend2Changed FINAL)
 
@@ -241,6 +242,7 @@ signals:
     void outDevChanged(const QString& name);
     void audioOutDevEnabledChanged(bool enabled);
     void outVolumeChanged(int volume);
+    void audioBitrateChanged(int bitrate);
     void enableTestSoundChanged(bool enabled);
     void enableBackend2Changed(bool enabled);
 
@@ -369,6 +371,9 @@ public:
     int getOutVolume() const;
     void setOutVolume(int volume);
 
+    int getAudioBitrate() const;
+    void setAudioBitrate(int bitrate);
+
     bool getEnableTestSound() const;
     void setEnableTestSound(bool newValue);
 
@@ -631,6 +636,7 @@ private:
     QString outDev;
     bool audioOutDevEnabled;
     int outVolume;
+    int audioBitrate;
     bool enableTestSound;
     bool enableBackend2;
 

src/widget/form/settings/avform.cpp

@@ -83,6 +83,8 @@ AVForm::AVForm()
     microphoneSlider->setTracking(false);
     microphoneSlider->installEventFilter(this);
 
+    fillAudioQualityComboBox();
+
     eventsInit();
 
     QDesktopWidget* desktop = QApplication::desktop();
@@ -121,7 +123,6 @@ void AVForm::showEvent(QShowEvent* event)
     getAudioInDevices();
     createVideoSurface();
     getVideoDevices();
-    fillAudioQualityComboBox();
 
     if (!subscribedToAudioIn) {
         // TODO: This should not be done in show/hide events
@@ -337,18 +338,25 @@ void AVForm::fillScreenModesComboBox()
 void AVForm::fillAudioQualityComboBox()
 {
     bool previouslyBlocked = audioQualityComboBox->blockSignals(true);
-    audioQualityComboBox->clear();
 
-    QString name;
-    name = tr("High (64 kbps)");
-    audioQualityComboBox->addItem(name);
-    name = tr("Medium (32 kbps)");
-    audioQualityComboBox->addItem(name);
-    name = tr("Low (16 kbps)");
-    audioQualityComboBox->addItem(name);
-    name = tr("Very Low (8 kbps)");
-    audioQualityComboBox->addItem(name);
+    QStringList names;
+    names << tr("High (64 kbps)") << tr("Medium (32 kbps)") << tr("Low (16 kbps")
+          << tr("Very low (8 kbps)");
+    audioQualityComboBox->addItems(names);
 
+    int currentBitrate = Settings::getInstance().getAudioBitrate();
+    QString currentBitrateString = QString::number(currentBitrate);
+    int index = 0;
+
+    for (int i = 0; i < names.length(); i++) {
+        QString name = names.at(i);
+        if (name.contains(currentBitrateString)) {
+            index = i;
+            break;
+        }
+    }
+
+    audioQualityComboBox->setCurrentIndex(index);
     audioQualityComboBox->blockSignals(previouslyBlocked);
 }
 
@@ -429,23 +437,9 @@ void AVForm::on_videoDevCombobox_currentIndexChanged(int index)
 
 void AVForm::on_audioQualityComboBox_currentIndexChanged(int index)
 {
-    uint32_t bitrate;
-    switch (index) {
-    case 1:
-        bitrate = 32;
-        break;
-    case 2:
-        bitrate = 16;
-        break;
-    case 3:
-        bitrate = 8;
-        break;
-    default:
-        bitrate = 64;
-        break;
-    }
-   
-    Core::getInstance()->getAv()->audioBitrate = bitrate;
+    int bitrates[] = { 64, 32, 16, 8 };
+    int bitrate = bitrates[index];
+    Settings::getInstance().setAudioBitrate(bitrate);
 }
 
 void AVForm::getVideoDevices()

src/widget/form/settings/avform.ui

@@ -111,7 +111,7 @@
           <item row="4" column="0">
            <widget class="QLabel" name="audioQualityLabel">
             <property name="text">
-             <string>Audio Quality</string>
+             <string>Audio quality</string>
             </property>
            </widget>
           </item>