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SonicForgeStudio/native_bridge/src/main.cpp
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// native_bridge/src/main.cpp
// Entry point of daw_vst_bridge.exe — opens shared memory created by the DAW
// (Rust/Tauri side), runs the real-time MIDI->audio loop, watches the parent.
#include "INativeInstrument.h"
#include "SharedMemoryIPC.h"
#include "NativeInstrumentEngine.h"
#ifdef _WIN32
#include <windows.h>
#include <imm.h>
#include <mmsystem.h>
#include <process.h>
#include <thread>
#else
#include <unistd.h>
#include <cstdlib>
#include <thread>
#endif
#include <chrono>
#include <algorithm>
#include <atomic>
#include <cctype>
#include <condition_variable>
#include <cstring>
#include <deque>
#include <functional>
#include <iostream>
#include <map>
#include <memory>
#include <mutex>
#include <set>
#include <string>
#include <vector>
// --- platform helpers -------------------------------------------------------
static bool parent_alive(uint32_t pid) {
#ifdef _WIN32
HANDLE h = OpenProcess(PROCESS_QUERY_LIMITED_INFORMATION, FALSE, pid);
if (!h) return false;
CloseHandle(h);
return true;
#else
return pid == 0 || (kill(pid, 0) == 0);
#endif
}
static void sleep_ms(uint32_t ms) {
#ifdef _WIN32
Sleep(ms);
#else
std::this_thread::sleep_for(std::chrono::milliseconds(ms));
#endif
}
#ifdef _WIN32
// IME recursion fix (Nexus 0xC00000FD -> USER32 0xC000041D): the plugin's
// wndproc calls ImmIsUIMessageW for every message and forwards WM_IME_* to the
// IME window; with a live IMC on the editor window that bounces back to the
// same hwnd -> infinite SendMessageW recursion -> stack overflow. Removing the
// IMC (ImmAssociateContext NULL) stops the forwarding.
static void disable_ime_contexts(HWND w) {
if (w && IsWindow(w)) {
char cls[64] = {0};
GetClassNameA(w, cls, 63);
ImmAssociateContext(w, nullptr);
for (HWND c = GetWindow(w, GW_CHILD); c; c = GetWindow(c, GW_HWNDNEXT)) {
char cls2[64] = {0};
GetClassNameA(c, cls2, 63);
ImmAssociateContext(c, nullptr);
}
}
}
// G1.3: bo pump gate cu (g_juceOwnerTids / g_ownerTid /
// is_teardown_window): teardown (close/LOAD job) va message pump cung chay tren
// 1 thread (UiThread) — job chay thi pump dung, job xong thi editor window da
// destroy nen USER32 tu huy message toi window chet. Khong con "2 thread trong
// 1 DLL" khi teardown (multi-worker cu).
// CBT hook: strip the IMC the moment any JUCE_* window is born (JUCE message
// window AND editor child) — the post-attach disable_ime_contexts runs too
// late; the recursion can start inside attachView (0xC00000FD observed, run
// 9). Runs on the window's creating thread, so the association is legal.
static HHOOK g_cbtHook = nullptr;
static LRESULT CALLBACK ImeCbtHookProc(int nCode, WPARAM wParam, LPARAM lParam) {
if (nCode == HCBT_CREATEWND) {
// Class name via GetClassNameA, NOT lpszClass: JUCE creates windows
// with MAKEINTATOM class names (HIWORD(lpszClass)==0), and ANSI-created
// windows deliver a CREATESTRUCTA — lpszClass is unusable in both cases.
HWND w = (HWND)wParam;
char cls[64] = {0};
if (GetClassNameA(w, cls, 63) > 0 && std::strncmp(cls, "JUCE_", 5) == 0) {
ImmAssociateContext(w, nullptr);
}
}
return CallNextHookEx(g_cbtHook, nCode, wParam, lParam);
}
#endif
#ifdef _WIN32
// Native VST editor windows registry — global de WM_DESTROY (chay tren worker
// thread cua channel tao window) co the don map. USERDATA luu channel+1 (KHONG
// luu con tro inst truc tiep: assign() thay inst moi moi lan load — con tro cu
// bi huy → WM_DESTROY tren con tro dangling → crash/hang bridge).
class ChannelWorker; // fwd — WM_DESTROY posts closeGUI() to the channel worker
static void post_close_gui(uint32_t ch, HWND hwnd); // defined after ChannelWorker
static void post_resize_view(uint32_t ch, int w, int h); // defined after ChannelWorker
static InstrumentEngineManager* g_engine = nullptr;
static std::mutex g_guiMutex;
static std::map<uint32_t, void*> g_guiWindows; // channel -> HWND (keep window alive)
static std::map<HWND, uint32_t> g_hwndToCh; // HWND -> channel (WM_DESTROY cleanup)
static ChannelWorker* g_uiWorker = nullptr;
// Same-plugin-DLL reentrancy guards: two threads inside one VST3 DLL (Nexus)
// crash or deadlock. g_attachPaths = lowercase plugin paths whose reload/
// createView is running on some worker — a same-path close job must not unmute
// its channel mid-attach (the attach job owns the silence state until
// attachView finishes). g_closeInFlight = channels whose close job
// (closeGUI + destroy children + reload) is still inside createInstance —
// unmuting them then would race the plugin teardown.
static std::mutex g_attachMutex;
static std::vector<std::string> g_attachPaths;
static bool g_closeInFlight[16] = { false };
static LRESULT CALLBACK VstWindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam) {
if (uMsg == WM_CLOSE) {
uint32_t ch = UINT32_MAX;
{
std::lock_guard<std::mutex> lock(g_guiMutex);
auto it = g_hwndToCh.find(hwnd);
if (it != g_hwndToCh.end()) ch = it->second;
}
if (ch != UINT32_MAX) {
// CRASH FIX (0xc000041d STATUS_FATAL_USER_CALLBACK_EXCEPTION /
// 0xc0000005 trong USER32, Event Log 9:47/10:20/10:22):
// KHONG de DefWindowProc DestroyWindow o day. Plugin editor la
// child cua window nay, tao TREN worker thread (view->attached()
// chay trong attach job) - DestroyWindow tren main thread pha huy
// child cross-thread -> crash USER32. Detach view tren worker
// (closeGUI), an window, GIU window trong registry de reuse.
post_close_gui(ch, hwnd);
ShowWindow(hwnd, SW_HIDE);
return 0;
}
// Window khong thuoc registry (chua dang ky) - de DefWindowProc huy.
} else if (uMsg == WM_DESTROY) {
// Chi xay ra khi window thuc su bi huy (khong con path chu dong nao
// DestroyWindow khi view dang attached). Xoa registry + detach view.
uint32_t ch = UINT32_MAX;
{
std::lock_guard<std::mutex> lock(g_guiMutex);
auto it = g_hwndToCh.find(hwnd);
if (it != g_hwndToCh.end()) ch = it->second;
g_hwndToCh.erase(hwnd);
for (auto it = g_guiWindows.begin(); it != g_guiWindows.end();) {
if (it->second == hwnd) it = g_guiWindows.erase(it);
else ++it;
}
}
if (ch != UINT32_MAX) post_close_gui(ch, hwnd);
} else if (uMsg == WM_ERASEBKGND) {
return 1; // Do not paint background to prevent white flashes
} else if (uMsg == WM_PAINT) {
PAINTSTRUCT ps;
HDC hdc = BeginPaint(hwnd, &ps);
EndPaint(hwnd, &ps);
return 0;
} else if (uMsg == WM_SIZE) {
int w = LOWORD(lParam);
int h = HIWORD(lParam);
HWND child = FindWindowExA(hwnd, nullptr, nullptr, nullptr);
if (child) {
MoveWindow(child, 0, 0, w, h, TRUE);
}
uint32_t ch = UINT32_MAX;
{
std::lock_guard<std::mutex> lock(g_guiMutex);
auto it = g_hwndToCh.find(hwnd);
if (it != g_hwndToCh.end()) ch = it->second;
}
if (ch != UINT32_MAX) {
post_resize_view(ch, w, h);
}
return 0;
}
return DefWindowProcA(hwnd, uMsg, wParam, lParam);
}
#endif
// Serialize plugin loads across channels: concurrent VST3 createInstance on
// separate worker threads (Nexus) deadlocks inside the SDK factory - all
// stuck forever (observed: 3 concurrent Nexus loads, zero assign returned).
// One load at a time; SF2/SFZ loads are fast, contention negligible.
static std::mutex g_loadMutex;
// Pending OPEN_GUI requests whose channel instrument was not loaded yet.
// The main loop fulfils them as soon as the load job completes (assign ok),
// so the GUI button works regardless of JS retry timing.
static std::mutex g_pendingGuiMutex;
static std::map<uint32_t, std::pair<void*, std::string>> g_pendingGui;
// B9: native Win32 window for the VST editor (replaces the WebView2 surface —
// the HTML window was drawn ON TOP of the plugin GUI). MUST be created on the
// ChannelWorker thread so the worker's idle message pump services its messages.
static std::once_flag registerWindowOnce;
static void* create_native_vst_window(const char* title) {
#ifdef _WIN32
static const char* kWndClass = "SonicForge_Native_VST3_Class";
std::call_once(registerWindowOnce, []() {
WNDCLASSA wc = {};
wc.lpfnWndProc = VstWindowProc;
wc.hInstance = GetModuleHandleA(nullptr);
wc.lpszClassName = kWndClass;
RegisterClassA(&wc);
});
HWND hwnd = CreateWindowExA(0, kWndClass, title ? title : "VST",
WS_OVERLAPPEDWINDOW | WS_VISIBLE | WS_CLIPCHILDREN | WS_CLIPSIBLINGS,
CW_USEDEFAULT, CW_USEDEFAULT, 800, 600,
nullptr, nullptr, GetModuleHandleA(nullptr), nullptr);
return (void*)hwnd;
#else
(void)title;
return nullptr;
#endif
}
// G1.2: single persistent UiThread — ONE thread owns the COM STA apartment for
// ALL instruments for the whole bridge lifetime. loadPlugin and openGUI MUST run
// on the same thread — if the loading thread exits, its apartment dies and
// VST3 plugins that marshal internally (Nexus) hang forever in
// view->attached(). Verified with gui_probe: `bridge_like` (load thread exits,
// openGUI on another) hangs; `same_thread` (load+openGUI on one alive thread)
// returns attached=OK.
class ChannelWorker {
public:
ChannelWorker() {
#ifdef _WIN32
jobEvent_ = CreateEvent(nullptr, FALSE, FALSE, nullptr);
#endif
th_ = std::thread([this] {
#ifdef _WIN32
OleInitialize(nullptr);
OleInitialize(nullptr);
// Default IMC = none on this thread: new editor windows get
// no IME context (see disable_ime_contexts).
ImmAssociateContextEx(nullptr, nullptr, IACE_DEFAULT);
// CBT hook on this worker: strip IMC on JUCE_* windows at birth.
// Global hooks fail from an exe module — install per thread, and
// this thread creates the plugin editor windows.
SetWindowsHookExW(WH_CBT, ImeCbtHookProc, GetModuleHandleW(nullptr), GetCurrentThreadId());
// Elevate VST GUI thread priority to prevent throttling
SetThreadPriority(GetCurrentThread(), THREAD_PRIORITY_ABOVE_NORMAL);
#endif
std::unique_lock<std::mutex> lk(mu_);
for (;;) {
if (stop_ && jobs_.empty()) break;
if (!jobs_.empty()) {
auto job = std::move(jobs_.front());
jobs_.pop_front();
lk.unlock();
job();
lk.lock();
continue;
}
lk.unlock();
MSG msg;
bool hadMessages = false;
// Cap the idle pump per iteration to avoid starving the job queue,
// but pump up to 128 messages for high GUI responsiveness.
for (int pumped = 0; pumped < 128; ++pumped) {
if (!PeekMessageW(&msg, nullptr, 0, 0, PM_REMOVE)) break;
hadMessages = true;
// G1.3: bo pump gate cu — teardown (close/LOAD job)
// va pump cung 1 thread (UiThread): job chay thi pump dung;
// het job thi editor window da destroy -> message chet bi
// USER32 huy tu dong. Khong can drop theo close_in_flight.
TranslateMessage(&msg);
// CRASH FIX (0xc000041d STATUS_FATAL_USER_CALLBACK_EXCEPTION):
// a plugin window proc (Nexus throws nlohmann::json::out_of_range
// internally) that raises a C++ exception would otherwise escape
// DispatchMessageW and std::terminate this worker thread. Catch
// it here — the editor may glitch, but the bridge survives.
try {
DispatchMessageW(&msg);
} catch (...) {
std::cerr << "[NativeBridge] worker pump EXCEPTION — plugin window proc threw" << std::endl;
}
}
lk.lock();
if (!hadMessages && jobs_.empty()) {
#ifdef _WIN32
if (jobEvent_) {
lk.unlock();
MsgWaitForMultipleObjects(1, &jobEvent_, FALSE, 10, QS_ALLINPUT);
lk.lock();
} else {
cv_.wait_for(lk, std::chrono::milliseconds(2));
}
#else
cv_.wait_for(lk, std::chrono::milliseconds(2));
#endif
}
}
#ifdef _WIN32
OleUninitialize();
OleUninitialize();
#endif
});
}
~ChannelWorker() {
{
std::lock_guard<std::mutex> lk(mu_);
stop_ = true;
}
#ifdef _WIN32
if (jobEvent_) {
SetEvent(jobEvent_);
}
#endif
cv_.notify_all();
if (th_.joinable()) th_.join();
#ifdef _WIN32
if (jobEvent_) {
CloseHandle(jobEvent_);
jobEvent_ = nullptr;
}
#endif
}
void post(std::function<void()> job) {
{
std::lock_guard<std::mutex> lk(mu_);
jobs_.push_back(std::move(job));
}
#ifdef _WIN32
if (jobEvent_) {
SetEvent(jobEvent_);
}
#endif
cv_.notify_all();
}
private:
std::thread th_;
std::mutex mu_;
std::condition_variable cv_;
std::deque<std::function<void()>> jobs_;
bool stop_ = false;
#ifdef _WIN32
HANDLE jobEvent_ = nullptr;
#endif
};
// resizeView() must run on the channel worker (the view was attached in its
// COM STA apartment), never on the main pump thread.
static void post_resize_view(uint32_t ch, int w, int h) {
if (g_uiWorker) {
g_uiWorker->post([ch, w, h]() {
if (!g_engine) return;
auto* i = g_engine->get(ch);
if (i) i->resizeView(w, h);
});
}
}
// --- same-plugin-DLL silence helpers ----------------------------------------
// Two threads inside one VST3 DLL (Nexus) crash/deadlock: the audio loop's
// process() on one instance must not race createInstance/createView/terminate
// on another. Windows plugin paths are case-insensitive — compare lowercased.
static std::string lower_path_str(std::string p) {
std::transform(p.begin(), p.end(), p.begin(),
[](unsigned char c) { return (char)::tolower(c); });
return p;
}
static std::string lower_plugin_path(uint32_t ch) {
return g_engine ? lower_path_str(g_engine->pathOf(ch)) : std::string();
}
// Channels (other than ch) currently assigned the same plugin DLL path.
static std::vector<uint32_t> same_plugin_channels(uint32_t ch) {
std::vector<uint32_t> out;
std::string p = lower_plugin_path(ch);
if (p.empty()) return out;
for (uint32_t y = 0; y < 16; ++y) {
if (y == ch) continue;
if (!g_engine->get(y)) continue;
if (lower_plugin_path(y) == p) out.push_back(y);
}
return out;
}
static bool close_in_flight(uint32_t ch) {
std::lock_guard<std::mutex> lk(g_attachMutex);
return g_closeInFlight[ch];
}
// G1.3: 1 UiThread — editor windows tao trong attach job (UiThread), destroy
// chi goi tu UiThread job (close_editor_now / LOAD) -> ownerTid luon == current
// tid -> destroy truc tiep. Neu owner khac thread (khong con xay ra) -> bo
// (leak > crash): cross-thread DestroyWindow khong an toan.
static void destroy_window_on_owner(HWND hwnd) {
if (!hwnd || !IsWindow(hwnd)) return;
DWORD ownerTid = GetWindowThreadProcessId(hwnd, nullptr);
DWORD curTid = GetCurrentThreadId();
if (ownerTid == 0 || ownerTid == curTid) {
if (IsWindow(hwnd)) DestroyWindow(hwnd);
return;
}
std::cerr << "[NativeBridge] destroy_window_on_owner: owner tid=" << ownerTid
<< " != current " << curTid << " - leaving window " << hwnd << std::endl;
}
// Unmute y unless its own close job is still inside createInstance — that job
// performs the unmute once its fresh instance is loaded (or, if an attach for
// the same plugin is in flight, the attach job's restore does it).
static void unmute_if_not_closing(uint32_t y, const char* why) {
(void)why;
if (close_in_flight(y)) {
return;
}
g_engine->setReloading(y, false);
}
// closeGUI() MUST run on the UiThread (its COM STA apartment) — the view was
// attached there. Calling view->removed() from another thread is a
// cross-apartment COM call that corrupts the plugin; Nexus then hangs on the
// NEXT view->attached(). G1.2: 1 UiThread chung — close chay synchronous tren
// job; goi truc tiep (Option B trong attach job) hoac qua post_close_gui
// (WM_CLOSE/WM_DESTROY).
static void close_editor_now(uint32_t ch, HWND hwnd) {
// Guard window-replaced race: neu OPEN_GUI moi da dung window khac
// (hoac da xoa), khong detach view cua window moi.
{
std::lock_guard<std::mutex> lock(g_guiMutex);
auto it = g_guiWindows.find(ch);
if (it == g_guiWindows.end() || it->second != hwnd) {
return;
}
}
// Silence first: the audio loop must not process() the instance
// while we tear its editor down on this thread.
g_engine->setReloading(ch, true);
// Close-in-flight: until the fresh instance is loaded, no other
// job may unmute this channel (its plugin is being torn down).
{
std::lock_guard<std::mutex> lk(g_attachMutex);
g_closeInFlight[ch] = true;
}
if (auto* i = g_engine->get(ch)) {
// closeGUI() nulls the view WITHOUT view->removed() (Nexus
// removed() deadlocks this worker - modal wait for a message
// only its own pump can dispatch, but it is inside removed()).
try {
i->closeGUI();
} catch (...) {
std::cerr << "[NativeBridge] closeGUI EXCEPTION ch=" << ch
<< " — plugin threw" << std::endl;
}
// CRASH FIX: the editor was dropped WITHOUT view->removed() —
// the instance's editor state is dangling, so the audio loop
// must NOT process() it. Rebuild a fresh instance NOW on this
// worker (its COM STA apartment is alive); reload() ==
// terminate + loadPlugin (createInstance). Same-plugin
// channels are silenced so no second thread enters this DLL
// during createInstance (2 threads in one DLL -> Nexus exits
// silently, observed in probes). Serialized with other loads
// by g_loadMutex.
std::vector<uint32_t> sp = same_plugin_channels(ch);
for (uint32_t y : sp) {
g_engine->setReloading(y, true);
}
#ifdef _WIN32
// CRASH FIX (0xc000041d): destroy the editor's child windows
// on the thread that OWNS them (the plugin's JUCE
// MessageManager thread - a single worker), never
// cross-thread. Wait for each destroy to finish (owner worker
// serializes it with its pump) BEFORE reload() - otherwise
// reload's createInstance enters the DLL while the owner
// thread is still inside the plugin wndproc (2 threads in one
// DLL -> Nexus crash). Kept OUTSIDE g_loadMutex: the wait
// must not block other loads (the owner worker may itself be
// waiting on that lock).
disable_ime_contexts(hwnd);
if (hwnd && IsWindow(hwnd)) {
while (HWND c = FindWindowExA(hwnd, nullptr, nullptr, nullptr)) {
destroy_window_on_owner(c);
}
}
#endif
{
// reload() = terminate + loadPlugin (createInstance) —
// serialized with all other plugin-DLL entry points.
// Nexus may throw a C++ exception here too; catch it,
// treat as failed reload, and let the restore below
// unmute the channel (instance may be broken; next
// load/assign rebuilds it).
std::lock_guard<std::mutex> lg(g_loadMutex);
try {
// G0.4: reload() terminates + recreates the instance;
// capture the preset first, restore it after, so the
// sound survives a GUI close (reopen keeps it too).
i->captureState();
i->reload();
i->restoreState();
} catch (...) {
std::cerr << "[NativeBridge] closeGUI reload EXCEPTION ch=" << ch
<< " — plugin threw (createInstance)" << std::endl;
}
}
// createInstance is done: unmuting is safe again. But if an
// attach for the SAME plugin path is still running (its
// createView must not race process() on any same-path
// channel), leave the silence in place — the attach job's
// restore unmutes everything once attachView finished.
{
std::lock_guard<std::mutex> lk(g_attachMutex);
g_closeInFlight[ch] = false;
}
bool pathBusy = false;
{
std::lock_guard<std::mutex> lk(g_attachMutex);
std::string p = lower_plugin_path(ch);
pathBusy = !p.empty() &&
std::find(g_attachPaths.begin(), g_attachPaths.end(), p) != g_attachPaths.end();
}
if (!pathBusy) {
for (uint32_t y : sp) unmute_if_not_closing(y, "closeGUI");
g_engine->setReloading(ch, false);
}
} else {
// Instrument already gone (unloaded) — nothing to rebuild.
g_engine->setReloading(ch, false);
std::lock_guard<std::mutex> lk(g_attachMutex);
g_closeInFlight[ch] = false;
}
}
static void post_close_gui(uint32_t ch, HWND hwnd) {
if (g_uiWorker) {
g_uiWorker->post([ch, hwnd]() { close_editor_now(ch, hwnd); });
}
}
int main(int argc, char* argv[]) {
std::cout << "[NativeBridge] Starting DAW Host Bridge Engine..." << std::endl;
#ifdef _WIN32
// Disable Power Throttling (Efficiency Mode) for this background process
#ifndef PROCESS_POWER_THROTTLING_IGNORE_TIMER_RESOLUTION
#define PROCESS_POWER_THROTTLING_IGNORE_TIMER_RESOLUTION 0x00000004
#endif
#ifndef PROCESS_POWER_THROTTLING_EXECUTION_SPEED
#define PROCESS_POWER_THROTTLING_EXECUTION_SPEED 0x00000001
#endif
PROCESS_POWER_THROTTLING_STATE powerState = {};
powerState.Version = PROCESS_POWER_THROTTLING_CURRENT_VERSION;
powerState.ControlMask = PROCESS_POWER_THROTTLING_IGNORE_TIMER_RESOLUTION | PROCESS_POWER_THROTTLING_EXECUTION_SPEED;
powerState.StateMask = 0; // Turn off throttling
SetProcessInformation(GetCurrentProcess(), ProcessPowerThrottling, &powerState, sizeof(powerState));
// DPI: declare per-monitor v2 FIRST (before any window is created).
// Without it, on scaled displays (125/150%) the plugin's own renderer
// paints at 100% into an OS-scaled window -> blank/white panel with dark
// strips (reported "GUI trắng, không load"). Runtime call works even
// without an exe manifest. Ignore failure (already aware).
SetProcessDpiAwarenessContext(DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE_V2);
// Default IMC = none on the main thread (IME recursion fix).
// Default IMC = none on the main thread (IME recursion fix).
ImmAssociateContextEx(nullptr, nullptr, IACE_DEFAULT);
#endif
// 1. Shared memory name: argv --shm <name> | env SF_SHM_NAME | default
std::string shmName = "SonicForge_DAW_IPC";
for (int i = 1; i + 1 < argc; ++i) {
if (std::strcmp(argv[i], "--shm") == 0) shmName = argv[i + 1];
}
if (const char* e = std::getenv("SF_SHM_NAME")) shmName = e;
// Parent watchdog PID (set by Tauri sidecar spawner)
uint32_t parentPid = 0;
if (const char* e = std::getenv("SF_PARENT_PID")) parentPid = (uint32_t)std::atoi(e);
// V8 bug 2: watchdog THREAD rieng - main loop chi check parent_alive giua
// cac block; neu VST process() chan loop thi khong bao gio thoat -> orphan.
// Thread nay chay doc lap, parent chet -> TerminateProcess ngay. Kem
// start-time check chong PID reuse (OpenProcess tra handle cua process
// khac chiem lai PID -> tuong parent con song mai).
if (parentPid != 0) {
std::thread([parentPid]() {
auto proc_birth = [](HANDLE h) -> uint64_t {
FILETIME c, e, k, u;
if (GetProcessTimes(h, &c, &e, &k, &u))
return (uint64_t(c.dwHighDateTime) << 32) | c.dwLowDateTime;
return 0;
};
uint64_t birth = 0;
{
HANDLE h = OpenProcess(PROCESS_QUERY_LIMITED_INFORMATION, FALSE, parentPid);
if (h) { birth = proc_birth(h); CloseHandle(h); }
}
for (;;) {
Sleep(2000);
HANDLE h = OpenProcess(PROCESS_QUERY_LIMITED_INFORMATION, FALSE, parentPid);
if (!h) { TerminateProcess(GetCurrentProcess(), 0); return; }
uint64_t nowBirth = proc_birth(h);
CloseHandle(h);
if (birth != 0 && nowBirth != 0 && nowBirth != birth) {
TerminateProcess(GetCurrentProcess(), 0); return;
}
}
}).detach();
}
#ifdef _WIN32
// Real-time-ish timing: 1ms scheduler resolution
timeBeginPeriod(1);
HANDLE hMapFile = OpenFileMappingA(FILE_MAP_ALL_ACCESS, FALSE, shmName.c_str());
if (!hMapFile) {
std::cerr << "[NativeBridge] Failed to open Shared Memory mapping: " << shmName << std::endl;
return 1;
}
auto* shmIPC = (SharedAudioBufferIPC*)MapViewOfFile(hMapFile, FILE_MAP_ALL_ACCESS, 0, 0, sizeof(SharedAudioBufferIPC));
if (!shmIPC) { CloseHandle(hMapFile); return 1; }
#else
(void)shmName; // POSIX shm mapping (shm_open) added when porting off Windows
auto* shmIPC = (SharedAudioBufferIPC*)std::calloc(1, sizeof(SharedAudioBufferIPC));
if (!shmIPC) return 1;
#endif
InstrumentEngineManager instruments;
#ifdef _WIN32
g_engine = &instruments;
#endif
// Per-channel persistent workers: loadPlugin + openGUI run on the SAME
// thread whose COM STA apartment stays alive for the channel's lifetime
// (see ChannelWorker comment — a dead apartment hangs Nexus attached()).
// G1.2: MOT UiThread chung (COM STA + message pump + job queue) cho moi
// channel — thay 16 ChannelWorker. Verify gui_probe `shared_worker` (G1.1):
// load + openGUI 2 instance tren 1 worker OK, khong crash/hang.
ChannelWorker uiWorker;
g_uiWorker = &uiWorker;
// B9: native editor windows per channel — keep alive (HWND outlives the job).
// Registry la global (g_guiWindows) — WM_DESTROY cleanup can tu VstWindowProc.
// B8: sample rate from the DAW (Rust spawns us with SF_SAMPLE_RATE).
// Block size is fixed by the SHM layout (AUDIO_BLOCK_SIZE) — SF_BLOCK_SIZE
// is accepted but must match, otherwise warned and ignored.
double sampleRate = 44100.0;
if (const char* e = std::getenv("SF_SAMPLE_RATE")) {
double sr = (double)std::atoi(e);
if (sr > 0) sampleRate = sr;
}
if (const char* e = std::getenv("SF_BLOCK_SIZE")) {
uint32_t b = (uint32_t)std::atoi(e);
if (b != AUDIO_BLOCK_SIZE)
std::cerr << "[NativeBridge] SHM block size fixed at " << AUDIO_BLOCK_SIZE
<< " (SF_BLOCK_SIZE=" << b << " ignored)" << std::endl;
}
const uint32_t block = AUDIO_BLOCK_SIZE;
uint64_t playheadSamples = 0;
// V8 bug 3: khi STOP da xu ly, bo qua NOTE_ON (velocity>0) den sau - JS
// note-on timer co the bay toi sau STOP (guardPlay tre do React re-render)
// -> retrigger note -> VST loop am. Chi PLAY moi nhan note-on lai.
bool transportStopped = false;
auto dispatch = [&](const SharedAudioBufferIPC::MidiEventIPC& evt) {
// Manager-level dispatch: ONE engine-mutex hold per event (get +
// channelQuiet + instrument call) so assign()/unload() can never
// destroy the instance mid-call — use-after-free when loading a new
// VSTi while other channels keep playing. channelQuiet drops events
// for channels mid-reload only (G1.4: bo mute-when-editor-open).
// CRASH FIX: noteOn/noteOff/CC enter the plugin (DLL entry); a C++
// exception from the plugin must not escape the audio loop.
try {
switch (evt.command) {
case 0x9:
// sampleOffset LUON LUON = 0 khi den day: events duoc dispatch ngay
// truoc segment chua no (A11 splitting), nen offset tuong doi la 0.
// Truyen offset tuyet doi truoc day lam sfizz/VST3 trigger tre.
if (evt.velocity > 0) {
if (transportStopped) return; // V8 bug 3: drop note-on sau STOP
instruments.noteOn(evt.channel, evt.pitch, evt.velocity / 127.0f);
} else
instruments.noteOff(evt.channel, evt.pitch);
break;
case 0x8:
instruments.noteOff(evt.channel, evt.pitch);
break;
case 0xB: // CC: controller number in pitch, value in data2
// V9 bug 4: sau STOP, drop sustain-down (CC64>0) — JS co the
// gui CC64 xuong sau STOP (note-on/CC timer tre); VSTi giu
// note khi pedal down -> am treo loop. CC64=0 (sustain-up)
// van cho qua.
if (transportStopped && evt.pitch == 64 && evt.data2 > 0) return;
instruments.controlChange(evt.channel, evt.pitch, evt.data2);
break;
case 0xC: // program change: program in data2
instruments.programChange(evt.channel, evt.data2);
break;
case 0xE: // 14-bit pitch bend: data2 = LSB, data3 = MSB
instruments.pitchBend(evt.channel, evt.data2 | (uint32_t(evt.data3) << 7));
break;
default: break;
}
} catch (...) {
std::cerr << "[NativeBridge] dispatch EXCEPTION ch=" << (int)evt.channel
<< " cmd=" << std::hex << (int)evt.command << std::dec
<< " — plugin threw (note/CC)" << std::endl;
}
};
// Render only [from, to) of the block — used by sample-accurate splitting.
auto renderSegment = [&](uint32_t from, uint32_t to) {
if (to <= from) return;
instruments.renderAll(shmIPC->masterLeft + from, shmIPC->masterRight + from, to - from);
};
double blockDurationMs = (double)block / sampleRate * 1000.0;
auto startTime = std::chrono::steady_clock::now();
uint64_t blockCount = 0;
// OPEN_GUI handling - shared by the control queue and the pending-GUI
// sweep. Gate on the MAIN thread before creating a window: instrument
// load is ASYNC (worker thread); OPEN_GUI too early would attach to an
// empty channel and leave a blank window. Not loaded yet => remember the
// request; the sweep retries once the load job completes. Window MUST
// belong to the MAIN thread (audio loop pump dispatches its messages);
// a window on a worker whose pump is idle during jobs hangs
// view->attached() (gui_probe: two_workers_close TIMEOUT). The attach
// job runs on the channel worker (COM STA apartment stays alive).
// G0.3: while an attach job is in flight, tell the Tauri watchdog via
// SHM so a long Nexus reload/attach (can exceed 3s) is not mistaken
// for a dead bridge and killed. RAII -> cleared on every exit path.
struct AttachInFlightGuard {
SharedAudioBufferIPC* ipc;
explicit AttachInFlightGuard(SharedAudioBufferIPC* p) : ipc(p) { if (ipc) ipc->attachInFlight = 1; }
~AttachInFlightGuard() { if (ipc) ipc->attachInFlight = 0; }
};
auto handleOpenGui = [&](uint32_t guiCh, uintptr_t arg1, const std::string& pluginId) {
if (!instruments.get(guiCh)) {
std::cerr << "[NativeBridge] GUI deferred ch=" << guiCh
<< " plugin=" << pluginId << " (no instrument yet) - queued" << std::endl;
std::lock_guard<std::mutex> lock(g_pendingGuiMutex);
g_pendingGui[guiCh] = { (void*)arg1, pluginId };
return;
}
// Dedupe OPEN_GUI spam (frontend openVstGuiRetry): view dang
// attached -> GUI da mo, khong post attach job lan nua. Re-attach
// tren view dang attached lam plugin loi (Nexus createView null).
if (auto* i0 = instruments.get(guiCh)) {
if (i0->hasAttachedView()) {
return;
}
}
// G0.1 (BUG_REPORT): mo GUI khi dang PLAY -> attachView chay tren worker
// thread trong luc audio loop process() cung DLL (2 thread 1 plugin) ->
// Nexus throw (createView/attached) -> GUI khong load + retry spam ->
// stall 3s -> watchdog kill bridge -> mat het instrument -> cam. Defer
// OPEN_GUI toi khi transport STOP (sweep duoi fulfill khi loaded &&
// transportStopped). Khong doi: tranh mat am; user STOP la GUI tu mo.
if (!transportStopped) {
std::cerr << "[NativeBridge] GUI deferred ch=" << guiCh
<< " plugin=" << pluginId << " (transport PLAY) - queued" << std::endl;
std::lock_guard<std::mutex> lock(g_pendingGuiMutex);
g_pendingGui[guiCh] = { (void*)arg1, pluginId };
return;
}
// G1.2: window + attach chay tren UiThread (1 thread chung, COM STA +
// message pump + job queue). Window messages do UiThread pump dispatch —
// audio loop khong con PeekMessageW (xoa block pump o main loop).
// G1.1 verify: gui_probe shared_worker = 1 worker load+openGUI 2 inst OK.
uiWorker.post([&instruments, shmIPC, guiCh, arg1, arg2 = pluginId]() {
AttachInFlightGuard _aifGuard{shmIPC};
if (!instruments.get(guiCh)) {
std::cerr << "[NativeBridge] GUI attach FAILED hwnd=0"
<< " plugin=" << arg2 << " ch=" << guiCh << " (no instrument loaded)" << std::endl;
return;
}
if (auto* inst0 = instruments.get(guiCh)) {
if (inst0->hasAttachedView()) {
// Dedupe race: main da silence (setReloading) truoc khi post —
// restore de channel khong cam vinh vien.
std::vector<uint32_t> sp = same_plugin_channels(guiCh);
for (uint32_t y : sp) unmute_if_not_closing(y, "openGUI-dedupe");
unmute_if_not_closing(guiCh, "openGUI-dedupe");
return;
}
}
void* hwnd = (void*)arg1;
#ifdef _WIN32
HWND nativeHwnd = nullptr;
{
std::lock_guard<std::mutex> lock(g_guiMutex);
auto it = g_guiWindows.find(guiCh);
if (it != g_guiWindows.end()) nativeHwnd = (HWND)it->second;
}
if (hwnd == 0) {
if (nativeHwnd && IsWindow(nativeHwnd)) {
hwnd = (void*)nativeHwnd;
SetWindowTextA(nativeHwnd, arg2.c_str());
ShowWindow(nativeHwnd, SW_SHOW);
SetForegroundWindow(nativeHwnd);
// Reuse: cap nhat USERDATA (channel+1) - inst CU da bi thay
// the boi assign() -> WM_DESTROY sau nay lookup inst MOI.
SetWindowLongPtrA(nativeHwnd, GWLP_USERDATA, (LONG_PTR)(guiCh + 1));
} else {
nativeHwnd = (HWND)create_native_vst_window(arg2.c_str());
if (!nativeHwnd) {
std::cerr << "[NativeBridge] GUI create window FAILED plugin=" << arg2 << std::endl;
std::vector<uint32_t> sp = same_plugin_channels(guiCh);
for (uint32_t y : sp) unmute_if_not_closing(y, "openGUI-createfail");
unmute_if_not_closing(guiCh, "openGUI-createfail");
return;
}
{
std::lock_guard<std::mutex> lock(g_guiMutex);
g_guiWindows[guiCh] = nativeHwnd; // keep window alive
g_hwndToCh[nativeHwnd] = guiCh; // WM_DESTROY cleanup
}
SetWindowLongPtrA(nativeHwnd, GWLP_USERDATA, (LONG_PTR)(guiCh + 1));
hwnd = (void*)nativeHwnd;
}
}
#endif
// G0.1b: silence same-path instances on the MAIN thread BEFORE the
// attach job runs - renderAll of this loop iteration (and any before
// the worker sets reloading_) would otherwise process() another Nexus
// while the job's reload() (createInstance/terminate) enters the DLL
// -> 2 threads in 1 DLL -> Nexus hang -> writeIndex stall -> watchdog
// kills the bridge (observed: defer OK, attach after STOP still
// restarted). setReloading is a flag under the engine mutex; renderAll
// skips reloading channels, so no process() can race the job. The job
// keeps its own setReloading + restore logic unchanged. Dat o day (sau
// window create) de window fail khong keo mute vinh vien.
{
std::string gp0 = lower_plugin_path(guiCh);
if (!gp0.empty()) {
for (uint32_t y = 0; y < 16; ++y) {
if (y == guiCh) continue;
if (!instruments.get(y)) continue;
if (lower_plugin_path(y) == gp0)
instruments.setReloading(y, true);
}
instruments.setReloading(guiCh, true);
}
}
#ifdef _WIN32
// Option B: chi 1 editor VST mo tai 1 thoi diem toan bridge. Instance
// thu 2 cua CUNG plugin (Nexus) attach view o thread khac -> treo.
// G1.2: 1 UiThread -> dong editor cua channel khac DONG BO (goi
// close_editor_now truc tiep). Khong the PostMessage(WM_CLOSE) cho
// job khac nhu cu — job close nam sau job hien tai trong queue cua
// CUNG thread -> khong bao gio chay -> 5s timeout -> attach abort.
{
std::vector<uint32_t> others;
{
std::lock_guard<std::mutex> lock(g_guiMutex);
for (const auto& kv : g_guiWindows)
if (kv.first != guiCh) others.push_back(kv.first);
}
for (uint32_t y : others) {
// Skip channels whose editor already detached (close job
// finished): do not WM_CLOSE a hidden reused window, do
// not re-silence a channel that is already unmuted.
if (auto* yi0 = instruments.get(y)) {
if (!yi0->hasAttachedView()) {
continue;
}
}
HWND yHwnd = nullptr;
{
std::lock_guard<std::mutex> lock(g_guiMutex);
auto it = g_guiWindows.find(y);
if (it != g_guiWindows.end()) yHwnd = (HWND)it->second;
}
if (!yHwnd || !IsWindow(yHwnd)) continue;
close_editor_now(y, yHwnd);
}
}
#else
(void)0;
#endif
if (auto* inst = instruments.get(guiCh)) {
// Reopen sau khi dong: reload() (terminate + loadPlugin)
// PHAI chay tren worker thread nay - COM STA apartment
// cua channel song o day. view->attached() cung chay o
// day; window thuoc main thread nen main pump (audio
// loop) dispatch messages cua no - khong can pump worker.
// Chan UAF bang flag reloading_ (set/clear duoi engine
// mutex; renderAll giu mutex khi process).
// G1.4: bo mute-when-editor-open - channel process() binh
// thuong khi editor mo trong PLAY (verified: writeIndex
// advancing voi GUI open, Nexus khong crash). reloading_ giu
// im channel chi trong luc createView/createInstance chay
// (2 thread 1 DLL); clear ngay sau attach xong.
// STALL/CRASH FIX (Fix C, restored): silence EVERY channel
// assigned the SAME plugin DLL path for the reload+attach
// duration — the audio loop must not process() another
// instance of this DLL while createInstance/createView runs
// on this worker (2 threads in one DLL -> Nexus exits
// silently, observed in probes). Iterate ALL 16 channels, not
// just window-owning ones: session-restore instances without
// a window are live and renderable.
std::vector<uint32_t> samePathSilenced;
std::string gp = lower_plugin_path(guiCh);
if (!gp.empty()) {
for (uint32_t y = 0; y < 16; ++y) {
if (y == guiCh) continue;
if (!instruments.get(y)) continue;
if (lower_plugin_path(y) == gp) {
instruments.setReloading(y, true);
samePathSilenced.push_back(y);
}
}
}
instruments.setReloading(guiCh, true);
// Register attach-in-flight: a same-path close job must not
// unmute its channel while createView runs here (it stays
// silenced; this job's restore unmutes it at the end).
{
std::lock_guard<std::mutex> lk(g_attachMutex);
if (!gp.empty()) g_attachPaths.push_back(gp);
}
bool ok = false;
{
// Serialize ALL plugin-DLL entry (createInstance AND
// createView) with other loads: two threads inside one
// DLL (Nexus) crash. createView outside the lock raced a
// same-path close job's reload (createInstance) -> Nexus
// exited silently (observed in probes).
std::lock_guard<std::mutex> lg(g_loadMutex);
// CRASH FIX (0xc000041d): attachView -> view->attached()
// and reloadForGUI both enter the plugin DLL — a C++
// exception (Nexus) must not escape this job (would
// std::terminate the worker). Treat as attach failure;
// the else branch below closes the empty window.
try {
ok = inst->reloadForGUI();
// IME recursion fix: strip the editor's IMC before
// attachView creates the editor child — a live IMC on
// a JUCE_ window + plugin wndproc (ImmIsUIMessageW ->
// SendMessageW WM_IME_SETCONTEXT same hwnd) = infinite
// recursion (0xC00000FD, observed inside attachView).
if (ok) disable_ime_contexts((HWND)hwnd);
if (ok) ok = inst->attachView(hwnd);
} catch (...) {
std::cerr << "[NativeBridge] GUI attach EXCEPTION ch=" << guiCh
<< " — plugin threw (createView/attached)" << std::endl;
ok = false;
}
}
// Attach done (ok or failed) — close jobs may unmute again.
{
std::lock_guard<std::mutex> lk(g_attachMutex);
if (!gp.empty()) {
auto it = std::find(g_attachPaths.begin(), g_attachPaths.end(), gp);
if (it != g_attachPaths.end()) g_attachPaths.erase(it);
}
}
// Restore same-path silence. Channels whose own close job is
// still inside createInstance stay muted — that job owns
// their unmute and performs it once reload finished.
for (uint32_t y : samePathSilenced)
unmute_if_not_closing(y, "openGUI");
if (ok) {
disable_ime_contexts((HWND)hwnd);
std::cout << "[NativeBridge] GUI attached hwnd=" << hwnd
<< " plugin=" << arg2 << " ch=" << guiCh
<< std::endl;
instruments.setReloading(guiCh, false);
}
else {
// Attach failed -> no editor running -> safe to process again.
instruments.setReloading(guiCh, false);
std::cerr << "[NativeBridge] GUI attach FAILED hwnd=" << hwnd
<< " plugin=" << arg2 << std::endl;
#ifdef _WIN32
// Attach that — khong co view (VD: channel la SF2/SFZ hoac plugin
// loi). Dong ngay cua so vo nghia de khong con window treo trong
// registry; WM_CLOSE -> UiThread pump destroy (owner = UiThread).
// PostMessage an toan cross-thread (khong nhu DestroyWindow).
PostMessageA((HWND)hwnd, WM_CLOSE, 0, 0);
#endif
}
}
});
};
// 2. REAL-TIME AUDIO PROCESSING ENGINE LOOP
while (true) {
// CRASH FIX (0xc000041d): last-resort net — any C++ exception that
// escapes the targeted guards (e.g. inside renderAll -> process())
// must not kill the bridge. Log and continue the loop.
try {
// G1.2: audio loop KHONG pump messages nua — moi window (native VST +
// editor children) thuoc UiThread; UiThread pump dispatch chung.
// A. Control events — non-rt safe, drained first
for (uint32_t i = 0; i < shmIPC->controlQueueCount; ++i) {
const auto& c = shmIPC->controlQueue[i];
if (c.type == 2) { // LOAD_INSTRUMENT (A10: assign per MIDI channel)
// Robust path length: do not trust arg1 (Rust passes 0 for LOAD).
// Chay tren persistent worker thread cua channel: VST3 init
// (loadPlugin) co the mat giay — chay dong bo tren audio loop
// lam writeIndex stall > 3s -> Rust tuong bridge chet va restart
// nham (2 bridge cung map SHM -> race control queue / double
// load). assign() chi giu mutex khi ghi map nen renderAll khong
// bao gio stall. openGUI sau nay chay tren CUNG thread nay
// (ChannelWorker) — thread khong bao gio exit nen COM STA
// apartment cua plugin con song (xem ChannelWorker comment).
size_t plen = 0;
while (plen < sizeof(c.arg2) && c.arg2[plen]) ++plen;
std::string path(c.arg2, plen);
InstrumentType t = (InstrumentType)c.arg0;
uint32_t ch = c.channel & 0xF;
uiWorker.post([&instruments, t, ch, path, sampleRate, block]() {
// CRASH FIX: this job enters the plugin DLL (createInstance
// in loadPlugin, old-instance terminate on replace) while
// the audio loop may process() another instance of the SAME
// DLL — 2 threads in one DLL crashes Nexus (observed with
// session-restore instances). Silence this channel (its old
// instance is being torn down / replaced) and every
// same-plugin channel for the whole job. Old path covers
// the old-instance teardown; the new path (computed BEFORE
// assign — see spNew below) covers the freshly created
// instance. CRASH FIX (SF→VSTi while playing): the new
// path must be silenced BEFORE assign() — assign() itself
// runs createInstance (loadPlugin) on this worker, and a
// restored channel on ANOTHER track holding the SAME DLL
// kept process()ing on the audio loop during that window
// (old code silenced spNew only AFTER assign → crash).
instruments.setReloading(ch, true);
std::vector<uint32_t> spOld = same_plugin_channels(ch);
for (uint32_t y : spOld) {
g_engine->setReloading(y, true);
}
// Channels (other than ch) already assigned the NEW path —
// silence BEFORE createInstance enters that DLL.
std::vector<uint32_t> spNew;
if (t == InstrumentType::VST3) {
std::string np = lower_path_str(path);
if (!np.empty()) {
for (uint32_t y = 0; y < 16; ++y) {
if (y == ch) continue;
if (!g_engine->get(y)) continue;
if (std::find(spOld.begin(), spOld.end(), y) != spOld.end()) continue;
if (lower_plugin_path(y) != np) continue;
g_engine->setReloading(y, true);
spNew.push_back(y);
}
}
}
#ifdef _WIN32
// DONG cua so editor dang mo cua channel TRUOC khi assign():
// thay the inst (VST3 -> SF2/inst khac) ma editor con song ->
// old inst destructor goi view->removed() tren HWND con hoat
// dong -> plugin block -> treo bridge.
// G1.2/G1.3: window tao tren UiThread (handleOpenGui post attach
// job; create_native_vst_window chay trong job). LOAD job cung
// chay tren UiThread -> khong cross-thread destroy. An window,
// giu registry de reuse; editor detach + reload o duoi.
HWND hToHide = nullptr;
{
std::lock_guard<std::mutex> lock(g_guiMutex);
auto git = g_guiWindows.find(ch);
if (git != g_guiWindows.end()) hToHide = (HWND)git->second;
}
// CRASH FIX: detach view TRUOC khi thay inst. Plugin editor
// children thuoc worker thread nay (attachView chay o day);
// khong destroy parent window (main-owned) khi view con song
// -> DestroyWindow cross-thread -> USER32 0xc000041d. An
// window, giu trong registry de reuse (reopen ShowWindow lai).
if (hToHide && IsWindow(hToHide)) {
// CRASH FIX (0xc000041d USER32 while playing): silence
// the channel while the old editor detaches — view->removed()
// on this worker would race processor->process() on the
// audio loop (same plugin instance).
instruments.setReloading(ch, true);
// CRASH FIX: the plugin's editor window procs run on
// this worker; if one throws (Nexus) the exception must
// not escape the LOAD job (would std::terminate the
// worker). Detach best-effort and continue.
try {
disable_ime_contexts(hToHide);
if (auto* i = instruments.get(ch)) i->closeGUI();
// CRASH FIX (0xc000041d): destroy the old
// editor's child windows on the thread that OWNS
// them (JUCE MessageManager worker), never
// cross-thread - DestroyWindow from this LOAD
// worker raced the owner's pump dispatching
// WM_PAINT into the plugin wndproc -> AV. Wait
// for each destroy before assign() below. The
// parent window is hidden and kept for reuse.
// See post_close_gui for the same pattern.
while (HWND c = FindWindowExA(hToHide, nullptr, nullptr, nullptr)) {
destroy_window_on_owner(c);
}
} catch (...) {
std::cerr << "[NativeBridge] LOAD close-editor EXCEPTION ch=" << ch
<< " — plugin window proc threw" << std::endl;
}
ShowWindow(hToHide, SW_HIDE);
}
#endif
std::lock_guard<std::mutex> lg(g_loadMutex);
// CRASH FIX (0xc000041d): Nexus throws nlohmann::json::
// out_of_range inside createInstance (loadPlugin) — the
// C++ exception must not escape the LOAD job (would
// std::terminate the worker). Catch it, treat as failed
// load, keep the old instance, and let the restore below
// unmute the channel.
bool ok = false;
try {
ok = instruments.assign(ch, t, path, sampleRate, block);
} catch (...) {
std::cerr << "[NativeBridge] assign EXCEPTION ch=" << ch
<< " type=" << (int)t << " path=" << path
<< " — plugin threw (createInstance)" << std::endl;
ok = false;
}
if (ok) {
std::cout << "[NativeBridge] instrument loaded ch=" << ch
<< " type=" << (int)t << " " << path << std::endl;
} else {
std::cerr << "[NativeBridge] instrument load FAILED ch=" << ch
<< " type=" << (int)t << " " << path << std::endl;
}
// Restore. Failed load keeps the OLD instance — unmute it
// back (silenced at job start); a successful assign leaves
// the fresh instance unmuted by construction.
if (!ok) g_engine->setReloading(ch, false);
for (uint32_t y : spOld) unmute_if_not_closing(y, "load");
for (uint32_t y : spNew) unmute_if_not_closing(y, "load");
});
} else if (c.type == 1) { // PANIC
instruments.allNotesOff();
std::cout << "[NativeBridge] PANIC — all notes off" << std::endl;
} else if (c.type == 3) { // TRANSPORT (A13)
if (c.arg0 == 0) { // STOP → flush every note immediately
transportStopped = true;
// Release sustain pedal TRUOC (CC64=0) — nhieu VSTi giu note
// khi pedal con down -> note-off cua allNotesOff bi bo qua
// -> am treo loop (V8 bug 3).
for (uint32_t ch = 0; ch < 16; ++ch) {
if (auto* inst = instruments.get(ch)) inst->controlChange(ch, 64, 0);
}
instruments.allNotesOff();
std::cout << "[NativeBridge] transport STOP — all notes off" << std::endl;
} else if (c.arg0 == 1) { // PLAY
transportStopped = false;
playheadSamples = c.arg1;
std::cout << "[NativeBridge] transport PLAY playhead=" << playheadSamples << std::endl;
} else if (c.arg0 == 2) { // SET_POSITION (seek while stopped)
playheadSamples = c.arg1;
}
} else if (c.type == 4) { // OPEN_GUI (A7): arg1 = parent HWND (0 → bridge tự tạo native window), arg2 = plugin id
uint32_t guiCh = c.channel;
if (guiCh >= 16) guiCh = 0;
handleOpenGui(guiCh, (uintptr_t)c.arg1, std::string(c.arg2));
}
}
shmIPC->controlQueueCount = 0;
// Pending OPEN_GUI requests: fulfilled as soon as the channel's
// instrument becomes available (load job completed on its worker).
{
std::vector<std::pair<uint32_t, std::pair<void*, std::string>>> readyGui;
{
std::lock_guard<std::mutex> lock(g_pendingGuiMutex);
for (auto it = g_pendingGui.begin(); it != g_pendingGui.end(); ) {
// G0.1: giu entry khi dang PLAY - handleOpenGui se defer lai
if (transportStopped && instruments.get(it->first)) {
readyGui.push_back({ it->first, it->second });
it = g_pendingGui.erase(it);
} else ++it;
}
}
for (auto& g : readyGui)
handleOpenGui(g.first, (uintptr_t)g.second.first, g.second.second);
}
// B. Snapshot queued MIDI events (bounded copy, queue reset immediately)
uint32_t nEvents = shmIPC->midiQueueCount > 64 ? 64 : shmIPC->midiQueueCount;
SharedAudioBufferIPC::MidiEventIPC evts[64];
for (uint32_t i = 0; i < nEvents; ++i) evts[i] = shmIPC->midiQueue[i];
shmIPC->midiQueueCount = 0;
// A11 sample-accurate: sort by sampleOffset, dispatch at each boundary,
// render the sub-block before the boundary. Events with offset 0 (live
// keyboard, current JS) are dispatched first and shape the whole block.
std::stable_sort(evts, evts + nEvents,
[](const SharedAudioBufferIPC::MidiEventIPC& a,
const SharedAudioBufferIPC::MidiEventIPC& b) {
return a.sampleOffset < b.sampleOffset;
});
uint32_t cursor = 0;
uint32_t ei = 0;
while (ei < nEvents && evts[ei].sampleOffset <= cursor) { dispatch(evts[ei]); ++ei; }
for (; ei < nEvents; ++ei) {
uint32_t off = evts[ei].sampleOffset < block ? evts[ei].sampleOffset : block;
if (off > cursor) { renderSegment(cursor, off); cursor = off; }
dispatch(evts[ei]);
}
if (cursor < block) renderSegment(cursor, block);
shmIPC->bridgeWriteIndex++;
// D. Parent died / window closed -> exit (no orphan process)
if (parentPid != 0 && !parent_alive(parentPid)) {
std::cout << "[NativeBridge] parent gone — exiting." << std::endl;
break;
}
// E. Synchronize with real-time audio playback
blockCount++;
auto targetTime = startTime + std::chrono::microseconds(static_cast<int64_t>(blockCount * blockDurationMs * 1000.0));
auto now = std::chrono::steady_clock::now();
if (now < targetTime) {
auto diff = std::chrono::duration_cast<std::chrono::microseconds>(targetTime - now).count();
if (diff > 1000) {
sleep_ms(diff / 1000);
}
while (std::chrono::steady_clock::now() < targetTime) {
std::this_thread::yield();
}
}
} catch (...) {
std::cerr << "[NativeBridge] main loop EXCEPTION — plugin threw during render/control" << std::endl;
}
}
#ifdef _WIN32
UnmapViewOfFile(shmIPC);
CloseHandle(hMapFile);
timeEndPeriod(1);
CoUninitialize();
#else
std::free(shmIPC);
#endif
return 0;
}
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