From 7b7d32d22ccc90e1137c9f7eb2e8a360c426016a Mon Sep 17 00:00:00 2001
From: ItsTheSky <nicolas@racot.fr>
Date: Wed, 15 Jul 2026 12:00:25 +0200
Subject: [PATCH] add logging for camera blacklist and COM initialization
 status

---
 source/webcam.cpp | 27 ++++++++++++++++++++++-----
 1 file changed, 22 insertions(+), 5 deletions(-)

diff --git a/source/webcam.cpp b/source/webcam.cpp
index 05c62c2..8f82bc7 100644
--- a/source/webcam.cpp
+++ b/source/webcam.cpp
@@ -160,7 +160,11 @@ std::vector<int> DisplayDeviceInformation(IEnumMoniker *pEnum)
 				camera_ids.push_back(counter_device);
 				return_id_device = counter_device;
 			}
-				
+			else
+			{
+				__LOG_CAM__<<"CAM ID "<<counter_device<<" EXCLUDED BY BLACKLIST ("<<name.c_str()<<")\n";
+			}
+
 
 			__LOG_CAM__<<"RETURN DEVICE ID "<<return_id_device<<"\n";
 
@@ -210,18 +214,31 @@ bool Webcam::Open(int width_, int height_) {
 
 	std::vector<int> id_devices;
 	HRESULT hr = CoInitializeEx(NULL, COINIT_MULTITHREADED);
-	if (SUCCEEDED(hr))
+	char hr_buf[32];
+	sprintf_s(hr_buf, "0x%08lX", (unsigned long)hr);
+	__LOG_CAM__ << "CoInitializeEx hr=" << hr_buf << "\n";
+	// RPC_E_CHANGED_MODE : COM deja initialise (STA) sur ce thread, utilisable tel quel
+	bool com_usable = SUCCEEDED(hr) || hr == RPC_E_CHANGED_MODE;
+	bool com_owned = SUCCEEDED(hr);
+	if (com_usable)
 	{
 		IEnumMoniker *pEnum;
 
-		hr = EnumerateDevices(CLSID_VideoInputDeviceCategory, &pEnum);
-		if (SUCCEEDED(hr))
+		HRESULT hr_enum = EnumerateDevices(CLSID_VideoInputDeviceCategory, &pEnum);
+		sprintf_s(hr_buf, "0x%08lX", (unsigned long)hr_enum);
+		__LOG_CAM__ << "EnumerateDevices hr=" << hr_buf << "\n";
+		if (SUCCEEDED(hr_enum))
 		{
 			id_devices = DisplayDeviceInformation(pEnum);
 			pEnum->Release();
 		}
 
-		CoUninitialize();
+		if (com_owned)
+			CoUninitialize();
+	}
+	else
+	{
+		__LOG_CAM__ << "CoInitializeEx FAILED, enumeration skipped\n";
 	}
 
 	if (id_devices.size() == 0) {