[PATCH 0/1] MR8701: devenum: Add DevicePath field for a video input device.

[PATCH 1/1] devenum: Add DevicePath field for a video input device.

[Haoyang Chen]

From: Haoyang Chen

---
 dlls/devenum/createdevenum.c |  7 +++++-
 dlls/devenum/tests/devenum.c | 46 ++++++++++++++++++++++++++++++++++++
 2 files changed, 52 insertions(+), 1 deletion(-)

diff --git a/dlls/devenum/createdevenum.c b/dlls/devenum/createdevenum.c
index bc91b235804..055299aa832 100644
--- a/dlls/devenum/createdevenum.c
+++ b/dlls/devenum/createdevenum.c
@@ -713,7 +713,7 @@ static void register_vfw_codecs(void)

static void register_avicap_devices(void)
 {
-    WCHAR friendlyname[32], version[32];
+    WCHAR friendlyname[32], version[32], device_path[32];
     IPropertyBag *prop_bag = NULL;
     REGFILTERPINS2 rgpins = {0};
     REGPINTYPES rgtypes;
@@ -753,6 +753,11 @@ static void register_avicap_devices(void)
         V_I4(&var) = i;
         IPropertyBag_Write(prop_bag, L"VFWIndex", &var);

+        swprintf(device_path, ARRAY_SIZE(device_path), L"/dev/video%d", i);
+        V_VT(&var) = VT_BSTR;
+        V_BSTR(&var) = SysAllocString(device_path);
+        IPropertyBag_Write(prop_bag, L"DevicePath", &var);
+
         VariantClear(&var);
         IPropertyBag_Release(prop_bag);
     }
diff --git a/dlls/devenum/tests/devenum.c b/dlls/devenum/tests/devenum.c
index 52a96c122b8..ccc4eb3b5b2 100644
--- a/dlls/devenum/tests/devenum.c
+++ b/dlls/devenum/tests/devenum.c
@@ -1154,6 +1154,51 @@ static void test_vfw(void)
     IParseDisplayName_Release(parser);
 }

+static void test_video_input(void)
+{
+    ICreateDevEnum* create_devenum;
+    IEnumMoniker *mon;
+    IMoniker *moniker;
+    IPropertyBag *prop_bag;
+    GUID guid;
+    VARIANT var;
+    HRESULT hr;
+
+    hr = CoCreateInstance(&CLSID_SystemDeviceEnum, NULL, CLSCTX_INPROC_SERVER, &IID_ICreateDevEnum, (LPVOID*)&create_devenum);
+    ok(hr == S_OK, "Got hr %#lx.\n", hr);
+
+    hr = ICreateDevEnum_CreateClassEnumerator(create_devenum, &CLSID_VideoInputDeviceCategory, &mon, 0);
+    ok(hr == S_OK, "Got hr %#lx.\n", hr);
+
+    while (IEnumMoniker_Next(mon, 1, &moniker, NULL) == S_OK)
+    {
+        hr = IMoniker_BindToStorage(moniker, NULL, NULL, &IID_IPropertyBag, (void **)&prop_bag);
+        ok(hr == S_OK, "Got hr %#lx.\n", hr);
+
+        VariantInit(&var);
+        hr = IPropertyBag_Read(prop_bag, L"CLSID", &var, NULL);
+        ok(hr == S_OK, "Got hr %#lx.\n", hr);
+
+        hr = CLSIDFromString(V_BSTR(&var), &guid);
+        ok(hr == S_OK, "Got hr %#lx.\n", hr);
+
+        VariantClear(&var);
+        hr = IPropertyBag_Read(prop_bag, L"FriendlyName", &var, NULL);
+        ok(hr == S_OK, "Got hr %#lx.\n", hr);
+
+        VariantClear(&var);
+        hr = IPropertyBag_Read(prop_bag, L"DevicePath", &var, NULL);
+        ok(hr == S_OK, "Got hr %#lx.\n", hr);
+
+        VariantClear(&var);
+        IPropertyBag_Release(prop_bag);
+        IMoniker_Release(moniker);
+    }
+
+    IEnumMoniker_Release(mon);
+    ICreateDevEnum_Release(create_devenum);
+}
+
 START_TEST(devenum)
 {
     HRESULT hr;
@@ -1176,6 +1221,7 @@ START_TEST(devenum)
     test_wavein();
     test_midiout();
     test_vfw();
+    test_video_input();

CoUninitialize();
 }

[Maotong Zhang (＠xiaotong)]

Maotong Zhang (@xiaotong) commented about dlls/devenum/createdevenum.c:
>      V_I4(&var) = i;
>      IPropertyBag_Write(prop_bag, L"VFWIndex", &var);
>
> -
>    swprintf(device_path, ARRAY_SIZE(device_path), L"/dev/video%d", i);

Is it really okay to code a Linux path here? It doesn't seem right.

[Haoyang Chen (＠chenhaoyang)]

On Mon Aug  4 04:25:39 2025 +0000, Maotong Zhang wrote:
> Is it really okay to code a Linux path here? It doesn't seem right.

It only serves as a unique identifier field. The WeCom application actually doesn't use it, it just retrieves it and doesn't actually use it.

[Aida Jonikienė (＠DodoGTA)]

The tests fail and segfault on Windows (so maybe there needs to be a webcam check?)

[Haoyang Chen (＠chenhaoyang)]

On Mon Aug  4 06:44:24 2025 +0000, Aida Jonikienė wrote:
> The tests fail and segfault on Windows (so maybe there needs to be a
> webcam check?)

Sure, to need a physical camera device. The DevicePath field may not exist in some Windows series releases.

[zero (＠brandoncolon378)]

Hi im having a problem  setting up winlator 10.1 im struggling  to sign in to steam and the gta launcher app is refusing to initialize

[zero (＠brandoncolon378)]

Its says loading user data then the app crashes my device  is the s25+ with snapdragon 8 elite

[Alexandre Julliard (＠julliard)]

On Wed Aug 13 16:46:31 2025 +0000, zero wrote:
> Hi im having a problem  setting up winlator 10.1 im struggling  to sign
> in to steam and the gta launcher app is refusing to initialize

A merge request discussion is not meant for user support. Please ask such things on the forum.