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, 58 insertions, 0 deletions

diff --git a/src/model/pulsemodel.h b/src/model/pulsemodel.h
new file mode 100644
index 0000000..b96f2b1
--- /dev/null
+++ b/src/model/pulsemodel.h
@@ -0,0 +1,58 @@
+#pragma once
+
+#include <tqobject.h>
+#include <tqptrlist.h>
+
+#include <pulse/pulseaudio.h>
+
+#include "audiodevice.h"
+
+class PulseDevice;
+
+class PulseModel : public TQObject
+{
+    TQ_OBJECT
+
+public:
+    explicit PulseModel( TQObject *parent = 0 );
+    ~PulseModel();
+
+    bool open();
+    void close();
+
+    TQPtrList<AudioDevice> devices( AudioDevice::Category cat ) const;
+
+protected:
+    void customEvent( TQCustomEvent *e );
+
+signals:
+    void deviceAdded( AudioDevice *dev );
+    void deviceRemoved( AudioDevice *dev );
+    void ready();   // emitted once initial enumeration is complete
+
+private:
+    static void contextStateCb( pa_context *c, void *userdata );
+    static void sinkInfoCb( pa_context *c, const pa_sink_info *info, int eol, void *userdata );
+    static void sourceInfoCb( pa_context *c, const pa_source_info *info, int eol, void *userdata );
+    static void sinkInputInfoCb( pa_context *c, const pa_sink_input_info *info, int eol, void *userdata );
+    static void sourceOutputInfoCb( pa_context *c, const pa_source_output_info *info, int eol, void *userdata );
+    static void subscribeCb( pa_context *c, pa_subscription_event_type_t t, uint32_t idx, void *userdata );
+
+    void enumerateAll();
+    void addOrUpdateSink( const pa_sink_info *info );
+    void addOrUpdateSource( const pa_source_info *info );
+    void addOrUpdateSinkInput( const pa_sink_input_info *info );
+    void addOrUpdateSourceOutput( const pa_source_output_info *info );
+    void removeDevice( AudioDevice::Category cat, uint32_t paIndex );
+
+    pa_threaded_mainloop *m_mainloop;
+    pa_context           *m_context;
+
+    // Keyed by PA index within each category — stable objects, updated in place.
+    TQPtrList<PulseDevice> m_sinks;
+    TQPtrList<PulseDevice> m_sources;
+    TQPtrList<PulseDevice> m_sinkInputs;
+    TQPtrList<PulseDevice> m_sourceOutputs;
+
+    PulseDevice *findDevice( TQPtrList<PulseDevice> &list, uint32_t paIndex );
+};