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Fix Unity capture filter instances use the same device path #36

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Fix Unity capture filter instances use the same device path #36

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11 changes: 10 additions & 1 deletion Source/UnityCaptureFilter.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -1092,6 +1092,14 @@ __inline static GUID GetCLSIDUnityCaptureServiceNum(int i)
return NumCLSID;
}

struct AStringHolder { char str[256]; };
__inline static AStringHolder GetDevicePathNum(int i)
{
AStringHolder res;
StringCchPrintf(res.str, sizeof(res.str)/sizeof(*res.str), "foo:bar%d", i + 1);
return res;
}

extern "C" int CustomGetFactoryType(const IID &rClsID)
{
if (IsEqualCLSID(rClsID, CLSID_UnityCaptureProperties)) return 1;
Expand Down Expand Up @@ -1178,7 +1186,8 @@ static HRESULT RegisterFilters(BOOL bRegister)
StringFromCLSID(GetCLSIDUnityCaptureServiceNum(i), &CLSID_Filter_Str);
StringCchPrintfW(strKey, 256, L"SOFTWARE\\Classes\\CLSID\\%s\\Instance\\%s", CLSID_Category_Str, CLSID_Filter_Str);
RegOpenKeyExW(HKEY_LOCAL_MACHINE, strKey, 0, KEY_ALL_ACCESS, &hKey);
RegSetValueExA(hKey, "DevicePath", 0, REG_SZ, (LPBYTE)"foo:bar", (DWORD)sizeof("foo:bar"));
const char* path = GetDevicePathNum(i).str;
RegSetValueExA(hKey, "DevicePath", 0, REG_SZ, (LPBYTE)path, (DWORD)sizeof(path));
RegCloseKey(hKey);
}
if (FAILED(hr)) MessageBoxA(0, "Service RegisterFilter of IFilterMapper2 failed", "RegisterFilters setup", NULL);
Expand Down