Send bytes_used of v4l2 captured frame when video capture

media/video/capture/linux/v4l2_capture_delegate.h

 // Copyright 2015 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_LINUX_V4L2_VIDEO_CAPTURE_DELEGATE_H_
 #define MEDIA_VIDEO_CAPTURE_LINUX_V4L2_VIDEO_CAPTURE_DELEGATE_H_
 
 #if defined(OS_OPENBSD)
 #include <sys/videoio.h>
 #else
@@ skipping 81 matching lines @@
   // Fill in |format| with the given parameters, in a planarity dependent way.
   virtual bool FillV4L2Format(v4l2_format* format,
                               uint32_t width,
                               uint32_t height,
                               uint32_t pixelformat_fourcc) const = 0;
 
   // Finish filling |buffer| struct with planarity-dependent data.
   virtual void FinishFillingV4L2Buffer(v4l2_buffer* buffer) const = 0;
 
   // Sends the captured |buffer| to the |client_|, synchronously.
-  virtual void SendBuffer(
-      const scoped_refptr<BufferTracker>& buffer_tracker,
-      const v4l2_format& format) const = 0;
+  virtual void SendBuffer(const scoped_refptr<BufferTracker>& buffer_tracker,
+                          const v4l2_format& format,
+                          size_t bytes_used) const = 0;

[wuchengli, 2015/05/19 04:05:54]

s/bytes_used/bytesused/ to be consistent with v4l2_buffer. 

[kcwu, 2015/05/20 12:14:52]

Acknowledged.

 
   // A few accessors for SendBuffer()'s to access private member variables.
   VideoCaptureFormat capture_format() const { return capture_format_; }
   VideoCaptureDevice::Client* client() const { return client_.get(); }
   int rotation() const { return rotation_; }
 
  private:
   friend class base::RefCountedThreadSafe<V4L2CaptureDelegate>;
 
   // Returns the input |fourcc| as a std::string four char representation.
@@ skipping 26 matching lines @@
 
   // Clockwise rotation in degrees. This value should be 0, 90, 180, or 270.
   int rotation_;
 
   DISALLOW_COPY_AND_ASSIGN(V4L2CaptureDelegate);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_VIDEO_CAPTURE_LINUX_V4L2_VIDEO_CAPTURE_DELEGATE_H_