Video capture implementation using the Media Foundation API.

media/video/capture/win/video_capture_device_win.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.
 
 // Windows specific implementation of VideoCaptureDevice.
 // DirectShow is used for capturing. DirectShow provide its own threads
 // for capturing.
 
 #ifndef MEDIA_VIDEO_CAPTURE_WIN_VIDEO_CAPTURE_DEVICE_WIN_H_
 #define MEDIA_VIDEO_CAPTURE_WIN_VIDEO_CAPTURE_DEVICE_WIN_H_
 
 // Avoid including strsafe.h via dshow as it will cause build warnings.
 #define NO_DSHOW_STRSAFE
 #include <dshow.h>
 
 #include <map>
 #include <string>
 
 #include "base/threading/non_thread_safe.h"
 #include "base/threading/thread.h"
 #include "base/win/scoped_comptr.h"
 #include "media/video/capture/video_capture_device.h"
 #include "media/video/capture/video_capture_types.h"
+#include "media/video/capture/win/capability_list_win.h"
 #include "media/video/capture/win/sink_filter_win.h"
 #include "media/video/capture/win/sink_input_pin_win.h"
 
 namespace media {
 
 // All the methods in the class can only be run on a COM initialized thread.
 class VideoCaptureDeviceWin
     : public base::NonThreadSafe,
       public VideoCaptureDevice,
       public SinkFilterObserver {
  public:
   explicit VideoCaptureDeviceWin(const Name& device_name);
   virtual ~VideoCaptureDeviceWin();
   // Opens the device driver for this device.
   // This function is used by the static VideoCaptureDevice::Create function.
   bool Init();
 
   // VideoCaptureDevice implementation.
   virtual void Allocate(int width,
                         int height,
                         int frame_rate,
                         VideoCaptureDevice::EventHandler* observer) OVERRIDE;
   virtual void Start() OVERRIDE;
   virtual void Stop() OVERRIDE;
   virtual void DeAllocate() OVERRIDE;
   virtual const Name& device_name() OVERRIDE;
 
+  static void GetDeviceNames(Names* device_names);
+
  private:
   enum InternalState {
     kIdle,  // The device driver is opened but camera is not in use.
     kAllocated,  // The camera has been allocated and can be started.
     kCapturing,  // Video is being captured.
     kError  // Error accessing HW functions.
             // User needs to recover by destroying the object.
   };
-  typedef std::map<int, VideoCaptureCapability> CapabilityMap;
 
   // Implements SinkFilterObserver.
   virtual void FrameReceived(const uint8* buffer, int length);
 
   bool CreateCapabilityMap();
-  int GetBestMatchedCapability(int width, int height, int frame_rate);
   void SetErrorState(const char* reason);
 
   Name device_name_;
   InternalState state_;
   VideoCaptureDevice::EventHandler* observer_;
 
   base::win::ScopedComPtr<IBaseFilter> capture_filter_;
   base::win::ScopedComPtr<IGraphBuilder> graph_builder_;
   base::win::ScopedComPtr<IMediaControl> media_control_;
   base::win::ScopedComPtr<IPin> input_sink_pin_;
   base::win::ScopedComPtr<IPin> output_capture_pin_;
   // Used when using a MJPEG decoder.
   base::win::ScopedComPtr<IBaseFilter> mjpg_filter_;
   base::win::ScopedComPtr<IPin> input_mjpg_pin_;
   base::win::ScopedComPtr<IPin> output_mjpg_pin_;
 
   scoped_refptr<SinkFilter> sink_filter_;
 
   // Map of all capabilities this device support.
-  CapabilityMap capabilities_;
+  CapabilityList capabilities_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(VideoCaptureDeviceWin);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_VIDEO_CAPTURE_WIN_VIDEO_CAPTURE_DEVICE_WIN_H_