linux: add hearing aid

it's just a simple python script, with a toggle in the main app. i dont want to mess with the main app because it uses ATT instead of the AACP protocol which is implemented in the app.

Author: kavishdevar

linux/Main.qml

@@ -156,6 +156,13 @@ ApplicationWindow {
                     checked: airPodsTrayApp.deviceInfo.conversationalAwareness
                     onCheckedChanged: airPodsTrayApp.setConversationalAwareness(checked)
                 }
+
+                Switch {
+                    visible: airPodsTrayApp.airpodsConnected
+                    text: "Hearing Aid"
+                    checked: airPodsTrayApp.deviceInfo.hearingAidEnabled
+                    onCheckedChanged: airPodsTrayApp.setHearingAidEnabled(checked)
+                }
             }
 
             RoundButton {

linux/airpods_packets.h

@@ -107,6 +107,16 @@ namespace AirPodsPackets
         inline std::optional<bool> parseState(const QByteArray &data) { return Type::parseState(data); }
     }
 
+    // Hearing Aid
+    namespace HearingAid
+    {
+        using Type = BasicControlCommand<0x2C>;
+        static const QByteArray ENABLED = Type::ENABLED;
+        static const QByteArray DISABLED = Type::DISABLED;
+        static const QByteArray HEADER = Type::HEADER;
+        inline std::optional<bool> parseState(const QByteArray &data) { return Type::parseState(data); }
+    }
+
     // Allow Off Option
     namespace AllowOffOption
     {

linux/deviceinfo.hpp

@@ -15,6 +15,7 @@ class DeviceInfo : public QObject
     Q_PROPERTY(QString batteryStatus READ batteryStatus WRITE setBatteryStatus NOTIFY batteryStatusChanged)
     Q_PROPERTY(int noiseControlMode READ noiseControlModeInt WRITE setNoiseControlModeInt NOTIFY noiseControlModeChangedInt)
     Q_PROPERTY(bool conversationalAwareness READ conversationalAwareness WRITE setConversationalAwareness NOTIFY conversationalAwarenessChanged)
+    Q_PROPERTY(bool hearingAidEnabled READ hearingAidEnabled WRITE setHearingAidEnabled NOTIFY hearingAidEnabledChanged)
     Q_PROPERTY(int adaptiveNoiseLevel READ adaptiveNoiseLevel WRITE setAdaptiveNoiseLevel NOTIFY adaptiveNoiseLevelChanged)
     Q_PROPERTY(QString deviceName READ deviceName WRITE setDeviceName NOTIFY deviceNameChanged)
     Q_PROPERTY(Battery *battery READ getBattery CONSTANT)
@@ -67,6 +68,16 @@ class DeviceInfo : public QObject
         }
     }
 
+    bool hearingAidEnabled() const { return m_hearingAidEnabled; }
+    void setHearingAidEnabled(bool enabled)
+    {
+        if (m_hearingAidEnabled != enabled)
+        {
+            m_hearingAidEnabled = enabled;
+            emit hearingAidEnabledChanged(enabled);
+        }
+    }
+
     int adaptiveNoiseLevel() const { return m_adaptiveNoiseLevel; }
     void setAdaptiveNoiseLevel(int level)
     {
@@ -159,6 +170,7 @@ class DeviceInfo : public QObject
         setNoiseControlMode(NoiseControlMode::Off);
         setBluetoothAddress("");
         getEarDetection()->reset();
+        setHearingAidEnabled(false);
     }
 
     void saveToSettings(QSettings &settings)
@@ -168,6 +180,7 @@ class DeviceInfo : public QObject
         settings.setValue("model", static_cast<int>(model()));
         settings.setValue("magicAccIRK", magicAccIRK());
         settings.setValue("magicAccEncKey", magicAccEncKey());
+        settings.setValue("hearingAidEnabled", hearingAidEnabled());
         settings.endGroup();
     }
     void loadFromSettings(const QSettings &settings)
@@ -176,6 +189,7 @@ class DeviceInfo : public QObject
         setModel(static_cast<AirPodsModel>(settings.value("DeviceInfo/model", (int)(AirPodsModel::Unknown)).toInt()));
         setMagicAccIRK(settings.value("DeviceInfo/magicAccIRK", QByteArray()).toByteArray());
         setMagicAccEncKey(settings.value("DeviceInfo/magicAccEncKey", QByteArray()).toByteArray());
+        setHearingAidEnabled(settings.value("DeviceInfo/hearingAidEnabled", false).toBool());
     }
 
     void updateBatteryStatus()
@@ -191,6 +205,7 @@ class DeviceInfo : public QObject
     void noiseControlModeChanged(NoiseControlMode mode);
     void noiseControlModeChangedInt(int mode);
     void conversationalAwarenessChanged(bool enabled);
+    void hearingAidEnabledChanged(bool enabled);
     void adaptiveNoiseLevelChanged(int level);
     void deviceNameChanged(const QString &name);
     void primaryChanged();
@@ -202,6 +217,7 @@ class DeviceInfo : public QObject
     QString m_batteryStatus;
     NoiseControlMode m_noiseControlMode = NoiseControlMode::Transparency;
     bool m_conversationalAwareness = false;
+    bool m_hearingAidEnabled = false;
     int m_adaptiveNoiseLevel = 50;
     QString m_deviceName;
     Battery *m_battery;