Initial tmix skeleton — model layer + basic UI

PulseModel: stable PulseDevice objects keyed by PA index, updated
in-place via postEvent reconciliation. No bulk rebuilds. Three signals:
deviceAdded, deviceRemoved (device changed handled per-device via
volumeChanged/muteChanged/nameChanged).

MixerWindow: four-tab layout (Output/Input/Playback/Recording), adds
and removes individual DeviceWidgets in response to model signals.

Builds and links cleanly against TQt3/TDE + libpulse.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

1 files changed, 38 insertions, 0 deletions

diff --git a/src/model/audiodevice.h b/src/model/audiodevice.h
new file mode 100644
index 0000000..e753fc9
--- /dev/null
+++ b/src/model/audiodevice.h
@@ -0,0 +1,38 @@
+#pragma once
+
+#include <tqobject.h>
+#include <tqstring.h>
+
+class TQWidget;
+
+class AudioDevice : public TQObject
+{
+    TQ_OBJECT
+
+public:
+    enum Category {
+        Output,      // sinks, hardware output
+        Input,       // sources, hardware input
+        Playback,    // sink inputs (per-app playback streams)
+        Recording,   // source outputs (per-app recording streams)
+    };
+
+    AudioDevice( TQObject *parent = 0 ) : TQObject(parent) {}
+    virtual ~AudioDevice() {}
+
+    virtual TQString     name()     const = 0;
+    virtual Category    category() const = 0;
+
+    virtual int  volume()            const = 0;  // 0-100
+    virtual bool muted()             const = 0;
+    virtual void setVolume( int v )        = 0;
+    virtual void setMuted( bool m )        = 0;
+
+    // Creates the widget for this device. Caller takes ownership.
+    virtual TQWidget *createWidget( TQWidget *parent ) = 0;
+
+signals:
+    void volumeChanged( int v );
+    void muteChanged( bool m );
+    void nameChanged( const TQString &name );
+};