16 bpp video stream capture, render and createImageBitmap(video) using (CPU) shared memory buffers

media/capture/video/fake_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.
 
 // Implementation of a fake VideoCaptureDevice class. Used for testing other
 // video capture classes when no real hardware is available.
 
 #ifndef MEDIA_CAPTURE_VIDEO_FAKE_VIDEO_CAPTURE_DEVICE_H_
 #define MEDIA_CAPTURE_VIDEO_FAKE_VIDEO_CAPTURE_DEVICE_H_
 
@@ skipping 12 matching lines @@
 namespace media {
 
 class CAPTURE_EXPORT FakeVideoCaptureDevice : public VideoCaptureDevice {
  public:
   enum class BufferOwnership {
     OWN_BUFFERS,
     CLIENT_BUFFERS,
   };
 
   FakeVideoCaptureDevice(BufferOwnership buffer_ownership,
-                         float fake_capture_rate);
+                         float fake_capture_rate,
+                         VideoPixelFormat pixel_format = PIXEL_FORMAT_I420);
   ~FakeVideoCaptureDevice() override;
 
   // VideoCaptureDevice implementation.
   void AllocateAndStart(const VideoCaptureParams& params,
                         std::unique_ptr<Client> client) override;
   void StopAndDeAllocate() override;
   void GetPhotoCapabilities(GetPhotoCapabilitiesCallback callback) override;
   void SetPhotoOptions(mojom::PhotoSettingsPtr settings,
                        SetPhotoOptionsCallback callback) override;
   void TakePhoto(TakePhotoCallback callback) override;
 
  private:
   void CaptureUsingOwnBuffers(base::TimeTicks expected_execution_time);
   void CaptureUsingClientBuffers(base::TimeTicks expected_execution_time);
   void BeepAndScheduleNextCapture(
       base::TimeTicks expected_execution_time,
       const base::Callback<void(base::TimeTicks)>& next_capture);
 
   // |thread_checker_| is used to check that all methods are called in the
   // correct thread that owns the object.
   base::ThreadChecker thread_checker_;
 
   const BufferOwnership buffer_ownership_;
   // Frame rate of the fake video device.
   const float fake_capture_rate_;
+  // Pixel format of all device streams.
+  const VideoPixelFormat pixel_format_;
 
   std::unique_ptr<VideoCaptureDevice::Client> client_;
   // |fake_frame_| is used for capturing on Own Buffers.
   std::unique_ptr<uint8_t[]> fake_frame_;
   // Time when the next beep occurs.
   base::TimeDelta beep_time_;
   // Time since the fake video started rendering frames.
   base::TimeDelta elapsed_time_;
   VideoCaptureFormat capture_format_;
 
   uint32_t current_zoom_;
 
   // The system time when we receive the first frame.
   base::TimeTicks first_ref_time_;
   // FakeVideoCaptureDevice post tasks to itself for frame construction and
   // needs to deal with asynchronous StopAndDeallocate().
   base::WeakPtrFactory<FakeVideoCaptureDevice> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(FakeVideoCaptureDevice);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_CAPTURE_VIDEO_FAKE_VIDEO_CAPTURE_DEVICE_H_