Add Intel Perceptual Computing SDK based depth video capture for Windows

media/video/capture/win/video_capture_device_pxc_win.h

+// Copyright (c) 2014 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.
+
+#ifndef MEDIA_VIDEO_CAPTURE_WIN_VIDEO_CAPTURE_DEVICE_PXC_WIN_H_
+#define MEDIA_VIDEO_CAPTURE_WIN_VIDEO_CAPTURE_DEVICE_PXC_WIN_H_
+
+// Intel Perceptual Computing SDK headers.
+#include <pxccapture.h>
+#include <pxcsmartptr.h>
+
+#include <string>
+
+#include "base/threading/thread.h"
+#include "media/video/capture/video_capture_device.h"
+#include "media/video/capture/video_capture_types.h"
+
+namespace media {
+
+// PXCCapture based implementation of VideoCaptureDevice for "depth" camera.
+// PXCCapture does not provide its own thread for capturing so this
+// implementation uses a Chromium thread for fetching frames.
+
+class VideoCaptureDevicePXCWin : public VideoCaptureDevice {
+ public:
+  explicit VideoCaptureDevicePXCWin(const Name& device_name);
+  virtual ~VideoCaptureDevicePXCWin();
+
+  // Create the PXCCapture::Device.
+  // This function is used by the static VideoCaptureDevice::Create function.
+  bool Init();
+
+  // VideoCaptureDevice implementation.
+  virtual void AllocateAndStart(const VideoCaptureParams& params,
+                                scoped_ptr<Client> client) OVERRIDE;
+
+  virtual void StopAndDeAllocate() OVERRIDE;
+
+  static bool PlatformSupported();
+  static void AppendDeviceNames(Names* device_names);
+  static bool IsDepthDevice(const Name& device_name);
+  static void GetDeviceSupportedFormats(const Name& device,
+                                        VideoCaptureFormats* formats);
+
+ private:
+  enum InternalState {
+    kIdle,  // The device is created but the camera is not in use.
+    kCapturing,  // Video is being captured.
+    kError  // Error reported by PXCCapture API.
+  };
+
+  // Called on the pxc_capture_thread_.
+  void OnAllocateAndStart(int width,
+                          int height,
+                          int frame_rate,
+                          scoped_ptr<Client> client);
+  void OnStopAndDeAllocate();
+  void OnCaptureTask();
+
+  void SetErrorState(const std::string& reason);
+
+  InternalState state_;
+  scoped_ptr<VideoCaptureDevice::Client> client_;
+  Name device_name_;
+
+  // Thread used for reading data from the device.
+  base::Thread pxc_capture_thread_;
+
+  PXCSmartPtr<PXCCapture::VideoStream> stream_;
+  VideoCaptureFormat capture_format_;
+
+  // Depth camera properties.
+  pxcF32 depth_saturation_value_;
+  pxcF32 depth_low_confidence_value_;
+  pxcF32 depth_unit_in_micrometers_;
+  PXCRangeF32 depth_range_in_millimeters_;
+
+  // Depth image in YV12 format.
+  scoped_ptr<uint8[]> yv12_image_;
+
+  DISALLOW_IMPLICIT_CONSTRUCTORS(VideoCaptureDevicePXCWin);
+};
+
+}  // namespace media
+
+#endif  // MEDIA_VIDEO_CAPTURE_WIN_VIDEO_CAPTURE_DEVICE_PXC_WIN_H_
+