Reconnect support for DirectShow video capture devices in parallel to MediaFoundation ones.

media/video/capture/video_capture_device.h

Index: media/video/capture/video_capture_device.h
diff --git a/media/video/capture/video_capture_device.h b/media/video/capture/video_capture_device.h
index e5be4139e7056256a478a9be1169ed44229aa2dd..f571a766085e3178ff4483b2bf0f67292c5d61b0 100644
--- a/media/video/capture/video_capture_device.h
+++ b/media/video/capture/video_capture_device.h
@@ -15,6 +15,7 @@
 #include <list>
 #include <string>
 
+#include "base/logging.h"
 #include "base/time/time.h"
 #include "media/base/media_export.h"
 #include "media/video/capture/video_capture_types.h"
@@ -36,6 +37,20 @@ class MEDIA_EXPORT VideoCaptureDevice {
     Name() {}
     Name(const std::string& name, const std::string& id)
         : device_name_(name), unique_id_(id) {}
+
+#if defined(OS_WIN)
+    // Windows targets Capture Api type: it can only be set on construction.
+    enum CaptureApiType {
+      MEDIA_FOUNDATION,
+      DIRECT_SHOW,
+      API_TYPE_UNKNOWN
+    };
+
+    Name(const std::string& name,
+         const std::string& id,
+         const CaptureApiType api_type)
+        : device_name_(name), unique_id_(id), capture_api_class_(api_type) {}
+#endif  // if defined(OS_WIN)
     ~Name() {}
 
     // Friendly name of a device
@@ -55,9 +70,33 @@ class MEDIA_EXPORT VideoCaptureDevice {
       return unique_id_ < other.id();
     }
 
+#if defined(OS_WIN)
+    CaptureApiType capture_api_type() const {
+      return capture_api_class_.capture_api_type();
+    }
+#endif  // if defined(OS_WIN)
+
    private:
     std::string device_name_;
     std::string unique_id_;
+#if defined(OS_WIN)
+    // This class wraps the CaptureApiType, so it has a by default value if not
+    // inititalized, and I (mcasas) do a DCHECK on reading its value.
+    class CaptureApiClass{
+     public:
+      CaptureApiClass():  capture_api_type_(API_TYPE_UNKNOWN) {}
+      CaptureApiClass(const CaptureApiType api_type)
+          :  capture_api_type_(api_type) {}
+      CaptureApiType capture_api_type() const {
+        DCHECK_NE(capture_api_type_,  API_TYPE_UNKNOWN);
+        return capture_api_type_;
+      }
+     private:
+      CaptureApiType capture_api_type_;
+    };
+
+    CaptureApiClass capture_api_class_;
+#endif  // if defined(OS_WIN)
     // Allow generated copy constructor and assignment.
   };