T10: VST2 engine bridge (vestige.h clean-room, VST2AudioEngine.cpp, fake_vst2 test plugin)

2026-08-11 16:18:45 +07:00
parent 6bc197b909
commit aaf21ddf89
4 changed files with 696 additions and 0 deletions
@@ -0,0 +1,116 @@
+// fake_vst2.cpp — test plugin VST2 tối thiểu để verify bridge T10.
+// Sine 440Hz stereo qua processReplacing; editor trả rect giả.
+#define NOMINMAX
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+#include <cmath>
+#include <cstring>
+#include "vestige.h"
+
+namespace {
+
+struct FakeState
+{
+    float phase = 0.0f;
+    int32 sampleRate = 44100;
+};
+
+FakeState g_state;
+
+int32 VSTCALLBACK fakeDispatcher (AEffect* effect, int32 opcode, int32 index,
+                                  VstIntPtr value, void* ptr, float opt)
+{
+    (void) index;
+    (void) value;
+    (void) ptr;
+    (void) opt;
+    switch (opcode)
+    {
+        case effOpen:
+            return 1;
+        case effClose:
+            return 1;
+        case effSetSampleRate:
+            g_state.sampleRate = static_cast<int32> (opt);
+            return 1;
+        case effMainsChanged:
+            return 1;
+        case effStartProcess:
+        case effStopProcess:
+            return 1;
+        case effEditGetRect:
+        {
+            static ERect rect = {0, 0, 300, 400};
+            *reinterpret_cast<ERect**> (ptr) = &rect;
+            return 1;
+        }
+        case effEditOpen:
+            return 1;
+        case effEditClose:
+            return 1;
+        case effProcessEvents:
+            return 1;
+        case effGetEffectName:
+            std::strncpy (static_cast<char*> (ptr), "FakeVST2", 64);
+            return 1;
+        case effGetVendorString:
+            std::strncpy (static_cast<char*> (ptr), "SonicForgeStudio", 64);
+            return 1;
+        case effGetProductString:
+            std::strncpy (static_cast<char*> (ptr), "FakeVST2", 64);
+            return 1;
+        case effGetVendorVersion:
+            return 1;
+        case effIdentify:
+            return CCONST ('N', 'v', 'E', 'f');
+        case effCanDo:
+            return 0;
+        default:
+            return 0;
+    }
+}
+
+void VSTCALLBACK fakeProcessReplacing (AEffect*, float** inputs, float** outputs,
+                                       int32 sampleFrames)
+{
+    (void) inputs;
+    float* outL = outputs[0];
+    float* outR = outputs[1];
+    const float freq = 440.0f;
+    const float dt = freq / static_cast<float> (g_state.sampleRate);
+    for (int32 i = 0; i < sampleFrames; ++i)
+    {
+        float v = 0.25f * std::sin (2.0f * 3.14159265f * g_state.phase);
+        g_state.phase += dt;
+        if (g_state.phase >= 1.0f)
+            g_state.phase -= 1.0f;
+        outL[i] = v;
+        outR[i] = v;
+    }
+}
+
+AEffect g_effect;
+
+AEffect* VSTCALLBACK createInstance (void*)
+{
+    std::memset (&g_effect, 0, sizeof (g_effect));
+    g_effect.magic = CCONST ('V', 's', 't', 'P');
+    g_effect.dispatcher = &fakeDispatcher;
+    g_effect.processReplacing = &fakeProcessReplacing;
+    g_effect.numInputs = [] (AEffect*) -> int32 { return 0; };
+    g_effect.numOutputs = [] (AEffect*) -> int32 { return 2; };
+    g_effect.numParams = [] (AEffect*) -> int32 { return 0; };
+    g_effect.numPrograms = [] (AEffect*) -> int32 { return 0; };
+    g_effect.flags = [] (AEffect*) -> int32 { return effFlagsCanReplacing | effFlagsIsSynth; };
+    g_effect.uniqueID = CCONST ('F', 'k', '2', 'V');
+    g_effect.version = 1;
+    return &g_effect;
+}
+
+} // namespace
+
+extern "C" __declspec (dllexport) AEffect* VSTPluginMain (void* audioMaster)
+{
+    (void) audioMaster;
+    return createInstance (audioMaster);
+}