feat(audio): add setting to switch between new and old audio backend

src/audio/audio.cpp

@@ -20,6 +20,7 @@
 #include "audio.h"
 #include "src/audio/backend/openal.h"
 #include "src/audio/backend/openal2.h"
+#include "src/persistence/settings.h"
 
 #include <QDebug>
 
@@ -169,6 +170,19 @@
  */
 Audio& Audio::getInstance()
 {
-    static OpenAL2 instance;
-    return instance;
+    static bool initialized = false;
+    static bool Backend2 = false;
+
+    if(!initialized) {
+        Backend2 = Settings::getInstance().getEnableBackend2();
+        initialized = true;
+    }
+
+    if(Backend2) {
+        static OpenAL2 instance;
+        return instance;
+    } else {
+        static OpenAL instance;
+        return instance;
+    }
 }

src/audio/backend/openal2.cpp

@@ -288,29 +288,36 @@ bool OpenAL2::loadOpenALExtensions(ALCdevice* dev)
     // load OpenAL extension functions
     alcLoopbackOpenDeviceSOFT = reinterpret_cast<LPALCLOOPBACKOPENDEVICESOFT>
             (alcGetProcAddress(dev, "alcLoopbackOpenDeviceSOFT"));
-
     checkAlcError(dev);
     if(!alcLoopbackOpenDeviceSOFT) {
         qDebug() << "Failed to load alcLoopbackOpenDeviceSOFT function!";
         return false;
     }
+
     alcIsRenderFormatSupportedSOFT = reinterpret_cast<LPALCISRENDERFORMATSUPPORTEDSOFT>
             (alcGetProcAddress(dev, "alcIsRenderFormatSupportedSOFT"));
-
     checkAlcError(dev);
     if(!alcIsRenderFormatSupportedSOFT) {
         qDebug() << "Failed to load alcIsRenderFormatSupportedSOFT function!";
         return false;
     }
+
     alGetSourcedvSOFT = reinterpret_cast<LPALGETSOURCEDVSOFT>
             (alcGetProcAddress(dev, "alGetSourcedvSOFT"));
-
     checkAlcError(dev);
     if(!alGetSourcedvSOFT) {
         qDebug() << "Failed to load alGetSourcedvSOFT function!";
         return false;
     }
 
+    alcRenderSamplesSOFT = reinterpret_cast<LPALCRENDERSAMPLESSOFT>
+            (alcGetProcAddress(alOutDev, "alcRenderSamplesSOFT"));
+    checkAlcError(dev);
+    if(!alcRenderSamplesSOFT) {
+        qDebug() << "Failed to load alcRenderSamplesSOFT function!";
+        return false;
+    }
+
     return true;
 }
 
@@ -631,17 +638,14 @@ void OpenAL2::doOutput()
     }
 
     ALdouble latency[2] = {0};
-    if(alGetSourcedvSOFT) {
-        alGetSourcedvSOFT(alProxySource, AL_SEC_OFFSET_LATENCY_SOFT, latency);
-        checkAlError();
-    }
+    alGetSourcedvSOFT(alProxySource, AL_SEC_OFFSET_LATENCY_SOFT, latency);
+    checkAlError();
     //qDebug() << "Playback latency: " << latency[1] << "offset: " << latency[0];
 
     ALshort outBuf[AUDIO_FRAME_SAMPLE_COUNT] = {0};
     alcMakeContextCurrent(alProxyContext);
-    LPALCRENDERSAMPLESSOFT alcRenderSamplesSOFT =
-            reinterpret_cast<LPALCRENDERSAMPLESSOFT> (alcGetProcAddress(alOutDev, "alcRenderSamplesSOFT"));
     alcRenderSamplesSOFT(alProxyDev, outBuf, AUDIO_FRAME_SAMPLE_COUNT);
+    checkAlcError(alProxyDev);
 
     alcMakeContextCurrent(alOutContext);
     alBufferData(bufids[0], AL_FORMAT_MONO16, outBuf,

src/audio/backend/openal2.h

@@ -139,6 +139,7 @@ private:
     LPALCLOOPBACKOPENDEVICESOFT alcLoopbackOpenDeviceSOFT = nullptr;
     LPALCISRENDERFORMATSUPPORTEDSOFT alcIsRenderFormatSupportedSOFT = nullptr;
     LPALGETSOURCEDVSOFT alGetSourcedvSOFT = nullptr;
+    LPALCRENDERSAMPLESSOFT alcRenderSamplesSOFT = nullptr;
 };
 
 #endif // OPENAL2_H

src/persistence/settings.cpp

@@ -265,6 +265,10 @@ void Settings::loadGlobal()
         audioOutDevEnabled = s.value("audioOutDevEnabled", true).toBool();
         audioInGainDecibel = s.value("inGain", 0).toReal();
         outVolume = s.value("outVolume", 100).toInt();
+        enableBackend2 = false;
+        #ifdef USE_FILTERAUDIO
+        enableBackend2 = s.value("enableBackend2", false).toBool();
+        #endif
     }
     s.endGroup();
 
@@ -561,6 +565,7 @@ void Settings::saveGlobal()
         s.setValue("audioOutDevEnabled", audioOutDevEnabled);
         s.setValue("inGain", audioInGainDecibel);
         s.setValue("outVolume", outVolume);
+        s.setValue("enableBackend2", enableBackend2);
     }
     s.endGroup();
 
@@ -1840,6 +1845,22 @@ void Settings::setOutVolume(int volume)
     }
 }
 
+bool Settings::getEnableBackend2() const
+{
+    QMutexLocker locker{&bigLock};
+    return enableBackend2;
+}
+
+void Settings::setEnableBackend2(bool enabled)
+{
+    QMutexLocker locker{&bigLock};
+
+    if (enabled != enableBackend2) {
+        enableBackend2 = enabled;
+        emit enableBackend2Changed(enabled);
+    }
+}
+
 QRect Settings::getScreenRegion() const
 {
     QMutexLocker locker(&bigLock);

src/persistence/settings.h

@@ -100,6 +100,7 @@ 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(bool enableBackend2 READ getEnableBackend2 WRITE setEnableBackend2 NOTIFY enableBackend2Changed FINAL)
 
     // Video
     Q_PROPERTY(QString videoDev READ getVideoDev WRITE setVideoDev NOTIFY videoDevChanged FINAL)
@@ -234,6 +235,7 @@ signals:
     void audioOutDevEnabledChanged(bool enabled);
     void outVolumeChanged(int volume);
     void enableTestSoundChanged(bool enabled);
+    void enableBackend2Changed(bool enabled);
 
     // Video
     void videoDevChanged(const QString& name);
@@ -363,6 +365,9 @@ public:
     bool getEnableTestSound() const;
     void setEnableTestSound(bool newValue);
 
+    bool getEnableBackend2() const;
+    void setEnableBackend2(bool enabled);
+
     QString getVideoDev() const;
     void setVideoDev(const QString& deviceSpecifier);
 
@@ -617,6 +622,7 @@ private:
     bool audioOutDevEnabled;
     int outVolume;
     bool enableTestSound;
+    bool enableBackend2;
 
     // Video
     QString videoDev;

src/widget/form/settings/avform.cpp

@@ -60,6 +60,8 @@ AVForm::AVForm()
 
     cbEnableTestSound->setToolTip(tr("Play a test sound while changing the output volume."));
 
+    cbEnableBackend2->setChecked(s.getEnableBackend2());
+
     connect(rescanButton, &QPushButton::clicked, this, &AVForm::rescanDevices);
 
     playbackSlider->setTracking(false);
@@ -141,6 +143,11 @@ void AVForm::rescanDevices()
     getVideoDevices();
 }
 
+void AVForm::on_cbEnableBackend2_stateChanged()
+{
+    Settings::getInstance().setEnableBackend2(cbEnableBackend2->isChecked());
+}
+
 void AVForm::on_videoModescomboBox_currentIndexChanged(int index)
 {
     assert(0 <= index && index < videoModes.size());
@@ -552,3 +559,5 @@ void AVForm::retranslateUi()
 {
     Ui::AVForm::retranslateUi(this);
 }
+
+

src/widget/form/settings/avform.h

@@ -73,6 +73,8 @@ private slots:
 
     void rescanDevices();
 
+    void on_cbEnableBackend2_stateChanged();
+
 protected:
     void updateVideoModes(int curIndex);
 

src/widget/form/settings/avform.ui

@@ -30,8 +30,8 @@
        <rect>
         <x>0</x>
         <y>0</y>
-        <width>824</width>
-        <height>489</height>
+        <width>830</width>
+        <height>495</height>
        </rect>
       </property>
       <layout class="QVBoxLayout" name="verticalLayout_5">
@@ -44,30 +44,20 @@
           <property name="bottomMargin">
            <number>6</number>
           </property>
-          <item row="0" column="1" colspan="2">
-           <widget class="QComboBox" name="outDevCombobox"/>
-          </item>
-          <item row="3" column="1" colspan="2">
-           <widget class="QSlider" name="microphoneSlider">
-            <property name="orientation">
-             <enum>Qt::Horizontal</enum>
-            </property>
-           </widget>
-          </item>
-          <item row="3" column="0">
-           <widget class="QLabel" name="microphoneLabel">
+          <item row="2" column="0">
+           <widget class="QLabel" name="inDevLabel">
             <property name="text">
-             <string>Gain</string>
+             <string>Capture device</string>
             </property>
            </widget>
           </item>
-          <item row="2" column="1" colspan="2">
-           <widget class="QComboBox" name="inDevCombobox"/>
-          </item>
-          <item row="0" column="0">
-           <widget class="QLabel" name="outDevLabel">
+          <item row="1" column="2">
+           <widget class="QCheckBox" name="cbEnableTestSound">
             <property name="text">
-             <string>Playback device</string>
+             <string>Test Sound</string>
+            </property>
+            <property name="checked">
+             <bool>true</bool>
             </property>
            </widget>
           </item>
@@ -84,12 +74,11 @@
             </property>
            </widget>
           </item>
-          <item row="2" column="0">
-           <widget class="QLabel" name="inDevLabel">
-            <property name="text">
-             <string>Capture device</string>
-            </property>
-           </widget>
+          <item row="2" column="1" colspan="2">
+           <widget class="QComboBox" name="inDevCombobox"/>
+          </item>
+          <item row="0" column="1" colspan="2">
+           <widget class="QComboBox" name="outDevCombobox"/>
           </item>
           <item row="1" column="0">
            <widget class="QLabel" name="playbackLabel">
@@ -98,14 +87,38 @@
             </property>
            </widget>
           </item>
-          <item row="1" column="2">
-           <widget class="QCheckBox" name="cbEnableTestSound">
+          <item row="3" column="0">
+           <widget class="QLabel" name="microphoneLabel">
             <property name="text">
-             <string>Test Sound</string>
+             <string>Gain</string>
             </property>
-            <property name="checked">
+           </widget>
+          </item>
+          <item row="3" column="1" colspan="2">
+           <widget class="QSlider" name="microphoneSlider">
+            <property name="orientation">
+             <enum>Qt::Horizontal</enum>
+            </property>
+           </widget>
+          </item>
+          <item row="0" column="0">
+           <widget class="QLabel" name="outDevLabel">
+            <property name="text">
+             <string>Playback device</string>
+            </property>
+           </widget>
+          </item>
+          <item row="4" column="0" colspan="3">
+           <widget class="QCheckBox" name="cbEnableBackend2">
+            <property name="enabled">
              <bool>true</bool>
             </property>
+            <property name="toolTip">
+             <string>Enables the experimental audio backend with echo cancelling support, needs qTox restart to take effect.</string>
+            </property>
+            <property name="text">
+             <string>Enable experimental audio backend</string>
+            </property>
            </widget>
           </item>
          </layout>