Media Capture Depth Stream Extensions API: focal length and depth range.

content/browser/renderer_host/media/video_capture_manager.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.
 
 // VideoCaptureManager is used to open/close, start/stop, enumerate available
 // video capture devices, and manage VideoCaptureController's.
 // All functions are expected to be called from Browser::IO thread. Some helper
 // functions (*OnDeviceThread) will dispatch operations to the device thread.
 // VideoCaptureManager will open OS dependent instances of VideoCaptureDevice.
 // A device can only be opened once.
@@ skipping 154 matching lines @@
   // Some devices had troubles when stopped and restarted quickly, so the device
   // is only stopped when Chrome is sent to background and not when, e.g., a tab
   // is hidden, see http://crbug.com/582295.
   void OnApplicationStateChange(base::android::ApplicationState state);
 #endif
 
   using EnumerationCallback =
       base::Callback<void(const media::VideoCaptureDeviceDescriptors&)>;
   void EnumerateDevices(const EnumerationCallback& client_callback);
 
+  // Retrieves camera calibration information for a particular device. Returns
+  // nullopt_t if the |device_id| is not found or camera calibration information
+  // is not available for the device.  Camera calibration is cached during
+  // device(s) enumeration.
+  base::Optional<CameraCalibration> GetCameraCalibration(
+      const std::string& device_id);
+
  private:
   class CaptureDeviceStartRequest;
   struct DeviceEntry;
   struct DeviceInfo;
 
   using SessionMap = std::map<media::VideoCaptureSessionId, MediaStreamDevice>;
   using DeviceEntries = std::vector<std::unique_ptr<DeviceEntry>>;
   using DeviceInfos = std::vector<DeviceInfo>;
   using DeviceStartQueue = std::list<CaptureDeviceStartRequest>;
   using VideoCaptureDeviceDescriptor = media::VideoCaptureDeviceDescriptor;
@@ skipping 150 matching lines @@
   // Map used by DesktopCapture.
   std::map<media::VideoCaptureSessionId, gfx::NativeViewId>
       notification_window_ids_;
 
   DISALLOW_COPY_AND_ASSIGN(VideoCaptureManager);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_MEDIA_VIDEO_CAPTURE_MANAGER_H_