Win Video Capture: add DirectShow WDM devices capabilities enumeration.

media/video/capture/video_capture_device.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
 // VideoCaptureDevice is the abstract base class for realizing video capture
 // device support in Chromium. It provides the interface for OS dependent
 // implementations.
 // The class is created and functions are invoked on a thread owned by
 // VideoCaptureManager. Capturing is done on other threads, depending on the OS
 // specific implementation.
@@ skipping 88 matching lines @@
     }
     bool operator<(const Name& other) const {
       return unique_id_ < other.id();
     }
 
 #if defined(OS_WIN) || defined(OS_MACOSX)
     CaptureApiType capture_api_type() const {
       return capture_api_class_.capture_api_type();
     }
 #endif
+#if defined(OS_WIN)
+    const std::string& capabilities_unique_id() const {

[perkj_chrome, 2014/09/02 09:22:03]

add comment what this id really is and why this is not the same as id().
Should this maybe be names capabilities_id()?

[mcasas, 2014/09/02 15:13:41]

Done.

+      return capabilities_unique_id_;
+    }
+    void set_capabilities_unique_id(const std::string& id) {
+      capabilities_unique_id_ = id;
+    }
+#endif
 #if defined(OS_MACOSX)
     TransportType transport_type() const {
       return transport_type_;
     }
     bool is_blacklisted() const {
       return is_blacklisted_;
     }
     void set_is_blacklisted(bool is_blacklisted) {
       is_blacklisted_ = is_blacklisted;
     }
@@ skipping 13 matching lines @@
       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)
+    // ID used for capabilities retrieval. By default is equal to |unique_id|.
+    std::string capabilities_unique_id_;
+#endif
 #if defined(OS_MACOSX)
     TransportType transport_type_;
     // Flag used to mark blacklisted devices for QTKit Api.
     bool is_blacklisted_;
 #endif
     // Allow generated copy constructor and assignment.
   };
 
   // Manages a list of Name entries.
   typedef std::list<Name> Names;
@@ skipping 107 matching lines @@
   int GetPowerLineFrequencyForLocation() const;
 
  protected:
   static const int kPowerLine50Hz = 50;
   static const int kPowerLine60Hz = 60;
 };
 
 }  // namespace media
 
 #endif  // MEDIA_VIDEO_CAPTURE_VIDEO_CAPTURE_DEVICE_H_