Add VideoCaptureDevice::GetDeviceSupportedFormats to interface + implementation for Linux and Fake

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 172 matching lines @@
     virtual void OnFrameInfoChanged(const VideoCaptureCapability& info) {};
   };
   // Creates a VideoCaptureDevice object.
   // Return NULL if the hardware is not available.
   static VideoCaptureDevice* Create(const Name& device_name);
   virtual ~VideoCaptureDevice();
 
   // Gets the names of all video capture devices connected to this computer.
   static void GetDeviceNames(Names* device_names);
 
+  // Gets the capabilities of a particular device attached to the system. This
+  // method should be called before allocating or starting a device. In case
+  // format enumeration is not supported, or there was a problem, the formats
+  // array will be empty.
+  static void GetDeviceSupportedFormats(const Name& device,
+                                        VideoCaptureFormats* const formats);

[perkj_chrome, 2013/10/13 12:12:49]

remove const - please see GetDeviceNAmes.

[mcasas, 2013/10/14 08:24:46]

Done.

+
   // Prepare the camera for use. After this function has been called no other
   // applications can use the camera. On completion Client::OnFrameInfo()
   // is called informing of the resulting resolution and frame rate.
   // StopAndDeAllocate() must be called before the object is deleted.
   virtual void AllocateAndStart(
       const VideoCaptureCapability& capture_format,
       scoped_ptr<Client> client) = 0;
 
   // Deallocates the camera, possibly asynchronously.
   //
   // This call requires the device to do the following things, eventually: put
   // camera hardware into a state where other applications could use it, free
   // the memory associated with capture, and delete the |client| pointer passed
   // into AllocateAndStart.
   //
   // If deallocation is done asynchronously, then the device implementation must
   // ensure that a subsequent AllocateAndStart() operation targeting the same ID
   // would be sequenced through the same task runner, so that deallocation
   // happens first.
   virtual void StopAndDeAllocate() = 0;
 };
 
 }  // namespace media
 
 #endif  // MEDIA_VIDEO_CAPTURE_VIDEO_CAPTURE_DEVICE_H_