Add new VideoConference module for muting mic/cam (#11798)

* add new VideoConference module for muting mic/cam

Co-authored-by: PrzemyslawTusinski <61138537+PrzemyslawTusinski@users.noreply.github.com>
Co-authored-by: Niels Laute <niels.laute@live.nl>

src/modules/videoconference/VideoConferenceShared/VideoCaptureDeviceList.cpp

@@ -0,0 +1,100 @@
+#include "VideoCaptureDeviceList.h"
+#include "Logging.h"
+#include <mfapi.h>
+#include <Mfidl.h>
+
+#include <wil/resource.h>
+#include <wil/com.h>
+
+void VideoCaptureDeviceList::Clear()
+{
+    for (UINT32 i = 0; i < m_numberDevices; i++)
+    {
+        CoTaskMemFree(m_deviceFriendlyNames[i]);
+        if (m_ppDevices[i])
+        {
+            m_ppDevices[i]->Release();
+        }
+    }
+    CoTaskMemFree(m_ppDevices);
+    m_ppDevices = nullptr;
+    if (m_deviceFriendlyNames)
+    {
+        delete[] m_deviceFriendlyNames;
+    }
+
+    m_deviceFriendlyNames = nullptr;
+    m_numberDevices = 0;
+}
+
+HRESULT VideoCaptureDeviceList::EnumerateDevices()
+{
+    HRESULT hr = S_OK;
+    wil::com_ptr<IMFAttributes> pAttributes;
+    Clear();
+
+    // Initialize an attribute store. We will use this to
+    // specify the enumeration parameters.
+
+    hr = MFCreateAttributes(&pAttributes, 1);
+
+    // Ask for source type = video capture devices
+    if (SUCCEEDED(hr))
+    {
+        hr = pAttributes->SetGUID(
+            MF_DEVSOURCE_ATTRIBUTE_SOURCE_TYPE,
+            MF_DEVSOURCE_ATTRIBUTE_SOURCE_TYPE_VIDCAP_GUID);
+    }
+    else
+    {
+        LOG("VideoCaptureDeviceList::EnumerateDevices(): Couldn't MFCreateAttributes");
+    }
+    // Enumerate devices.
+    if (SUCCEEDED(hr))
+    {
+        hr = MFEnumDeviceSources(pAttributes.get(), &m_ppDevices, &m_numberDevices);
+    }
+    else
+    {
+        LOG("VideoCaptureDeviceList::EnumerateDevices(): Couldn't SetGUID");
+    }
+
+
+    if (FAILED(hr))
+    {
+        LOG("VideoCaptureDeviceList::EnumerateDevices(): MFEnumDeviceSources failed");
+        return hr;
+    }
+
+    m_deviceFriendlyNames = new (std::nothrow) wchar_t*[m_numberDevices];
+    for (UINT32 i = 0; i < m_numberDevices; i++)
+    {
+        UINT32 nameLength = 0;
+        m_ppDevices[i]->GetAllocatedString(MF_DEVSOURCE_ATTRIBUTE_FRIENDLY_NAME, &m_deviceFriendlyNames[i], &nameLength);
+    }
+
+    return hr;
+}
+
+HRESULT VideoCaptureDeviceList::GetDevice(UINT32 index, IMFActivate** ppActivate)
+{
+    if (index >= Count())
+    {
+        return E_INVALIDARG;
+    }
+
+    *ppActivate = m_ppDevices[index];
+    (*ppActivate)->AddRef();
+
+    return S_OK;
+}
+
+std::wstring_view VideoCaptureDeviceList::GetDeviceName(UINT32 index)
+{
+    if (index >= Count())
+    {
+        return {};
+    }
+
+    return m_deviceFriendlyNames[index];
+}