MJPEG acceleration for video capture using VAAPI

media/video/capture/linux/v4l2_capture_delegate.cc

 // 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.
 
 #include "media/video/capture/linux/v4l2_capture_delegate.h"
 
 #include <poll.h>
 #include <sys/fcntl.h>
 #include <sys/ioctl.h>
 #include <sys/mman.h>
@@ skipping 381 matching lines @@
   // Deenqueue, send and reenqueue a buffer if the driver has filled one in.
   if (device_pfd.revents & POLLIN) {
     v4l2_buffer buffer;
     FillV4L2Buffer(&buffer, 0);
 
     if (HANDLE_EINTR(ioctl(device_fd_.get(), VIDIOC_DQBUF, &buffer)) < 0) {
       SetErrorState("Failed to dequeue capture buffer");
       return;
     }
 
-    SendBuffer(buffer_tracker_pool_[buffer.index], video_fmt_);
+    SendBuffer(buffer_tracker_pool_[buffer.index], video_fmt_,
+               buffer.bytesused);
 
     if (HANDLE_EINTR(ioctl(device_fd_.get(), VIDIOC_QBUF, &buffer)) < 0) {
       SetErrorState("Failed to enqueue capture buffer");
       return;
     }
   }
 
   v4l2_task_runner_->PostTask(
       FROM_HERE, base::Bind(&V4L2CaptureDelegate::DoCapture, this));
 }
 
 void V4L2CaptureDelegate::SetErrorState(const std::string& reason) {
   DCHECK(v4l2_task_runner_->BelongsToCurrentThread());
   is_capturing_ = false;
   client_->OnError(reason);
 }
 
 }  // namespace media