video device: recheck the video properties

We could recheck for the video device capabilities whenever the
devices list is requested. This can avoid having a virtualcamera,
like OBS, with mismatching information from what is available on the system.

GitLab: jami-client-qt#747

Change-Id: I012cfb71e12c8e9965b9d112e3ff0488c7cb285c

src/media/video/winvideo/video_device_impl.cpp

@@ -57,10 +57,11 @@ public:
     DeviceParams getDeviceParams() const;
     void setDeviceParams(const DeviceParams&);
 
+    void setup();
+
 private:
     std::unique_ptr<CaptureGraphInterfaces> cInterface;
 
-    void setup();
     std::vector<VideoSize> sizeList_;
     std::map<VideoSize, std::vector<FrameRate>> rateList_;
     std::map<VideoSize, AM_MEDIA_TYPE*> capMap_;
@@ -80,6 +81,13 @@ VideoDeviceImpl::VideoDeviceImpl(const std::string& id)
 void
 VideoDeviceImpl::setup()
 {
+    // Add new size, rate, bitrate, and cap map.
+    sizeList_.clear();
+    rateList_.clear();
+    capMap_.clear();
+
+    cInterface.reset(new CaptureGraphInterfaces());
+
     if (id == DEVICE_DESKTOP) {
         name = DEVICE_DESKTOP;
         VideoSize size {0, 0};
@@ -357,6 +365,7 @@ VideoDevice::VideoDevice(const std::string& path,
 DeviceParams
 VideoDevice::getDeviceParams() const
 {
+    deviceImpl_->setup();
     return deviceImpl_->getDeviceParams();
 }