T13: NativeMixer mirror server pipeline (track gain/pan constant-power + brickwall limiter tanh, wired VST2/VST3 bridge, golden test 0.0001dB)

native_host/vst3_host_bridge.cpp

@@ -33,6 +33,7 @@
 #include "pluginterfaces/vst/ivstevents.h"
 
 #include "AudioEngine.h"
+#include "NativeMixer.h"
 
 #include <atomic>
 
@@ -99,6 +100,7 @@ struct Instance
     ComponentHandler handler;
     sonicforge::AudioEngine audio; // T12: native audio loop (SPSC + WASAPI)
     std::atomic<bool> audioRunning {false};
+    sonicforge::NativeMixer mixer; // T13: track gain/pan + master limiter
 };
 
 // T12: IEventList cố định (không cấp phát trên audio thread).
@@ -189,7 +191,9 @@ bool vst3AudioProcess (const sonicforge::MidiEvent* events, int32 eventCount,
     data.outputs = &outBus;
     data.inputEvents = &list;
 
-    return proc->process (data) == kResultOk;
+    const tresult res = proc->process (data);
+    inst->mixer.processInPlace (outL, outR, frames); // T13: gain/pan + limiter
+    return res == kResultOk;
 }
 
 std::mutex g_mutex;
@@ -547,4 +551,26 @@ __declspec (dllexport) int32 SF_VST3_SendNoteOff (int32 handle, int32 channel, i
     return it->second->audio.pushMidi (ev) ? 0 : -2;
 }
 
+// T13: track gain/pan + master limiter (NativeMixer). Set truoc AudioStart;
+// audio thread doc state nay (khong lock).
+__declspec (dllexport) int32 SF_VST3_SetTrackGainPan (int32 handle, float gainDb, float pan)
+{
+    std::lock_guard<std::mutex> lock (g_mutex);
+    auto it = g_instances.find (handle);
+    if (it == g_instances.end ())
+        return -1;
+    it->second->mixer.setTrack (sonicforge::TrackGainPan::fromDbPan (gainDb, pan));
+    return 0;
+}
+
+__declspec (dllexport) int32 SF_VST3_SetMasterLimiter (int32 handle, int32 active, float thresholdDb)
+{
+    std::lock_guard<std::mutex> lock (g_mutex);
+    auto it = g_instances.find (handle);
+    if (it == g_instances.end ())
+        return -1;
+    it->second->mixer.setLimiter (active != 0, thresholdDb);
+    return 0;
+}
+
 } // extern "C"