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

media/capture/video/video_capture_utils.h

 // Copyright 2016 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_CAPTURE_VIDEO_BLOB_UTILS_H_
-#define MEDIA_CAPTURE_VIDEO_BLOB_UTILS_H_
+#ifndef MEDIA_CAPTURE_VIDEO_VIDEO_CAPTURE_UTILS_H_
+#define MEDIA_CAPTURE_VIDEO_VIDEO_CAPTURE_UTILS_H_
 
 #include "media/mojo/interfaces/image_capture.mojom.h"
 
 namespace media {
 
 struct VideoCaptureFormat;
 
 // Helper method to create a mojom::Blob out of |buffer|, whose pixel format and
 // resolution are taken from |capture_format|. Returns a null BlobPtr in case of
 // error.
 mojom::BlobPtr Blobify(const uint8_t* buffer,
                        const uint32_t bytesused,
                        const VideoCaptureFormat& capture_format);
 
+// Helper method to check is stream format layout is 16 bit grayscale based on
+// format's fourcc. fourcc is reinterpretation of four character literal to
+// unsigned int.
+//
+bool IsY16FormatFourCc(unsigned fourcc);
+
 }  // namespace media
 
-#endif  // MEDIA_CAPTURE_VIDEO_BLOB_UTILS_H_
+#endif  // MEDIA_CAPTURE_VIDEO_VIDEO_CAPTURE_UTILS_H_