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fix(bridge): set ringMask=7 on Windows — ring collapsed to 1 slot (slot = writeIndex & 0), dropped audio blocks on GUI jank

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Lộc Phạm
2026-08-19 11:20:39 +07:00
parent 77360578fd
commit 2bbe80efa3
1 changed files with 4 additions and 0 deletions
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native_bridge/src/main.cpp
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@@ -717,6 +717,10 @@ int main(int argc, char* argv[]) {
} }
auto* shmIPC = (SharedAudioBufferIPC*)MapViewOfFile(hMapFile, FILE_MAP_ALL_ACCESS, 0, 0, sizeof(SharedAudioBufferIPC)); auto* shmIPC = (SharedAudioBufferIPC*)MapViewOfFile(hMapFile, FILE_MAP_ALL_ACCESS, 0, 0, sizeof(SharedAudioBufferIPC));
if (!shmIPC) { CloseHandle(hMapFile); return 1; } if (!shmIPC) { CloseHandle(hMapFile); return 1; }
// VSTi crackle fix: 8-slot audio ring (see SharedMemoryIPC.h). Must be set
// on Windows too — ringMask stays 0 otherwise and the ring collapses to
// 1 slot (slot = writeIndex & 0), dropping whole blocks on any jank.
shmIPC->ringMask = 7;
#else #else
(void)shmName; // POSIX shm mapping (shm_open) added when porting off Windows (void)shmName; // POSIX shm mapping (shm_open) added when porting off Windows
auto* shmIPC = (SharedAudioBufferIPC*)std::calloc(1, sizeof(SharedAudioBufferIPC)); auto* shmIPC = (SharedAudioBufferIPC*)std::calloc(1, sizeof(SharedAudioBufferIPC));