MJPEG acceleration for video capture using VAAPI

media/video/capture/linux/v4l2_capture_delegate_multi_plane.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_multi_plane.h"
 
 #include <sys/mman.h>
 
 namespace media {
 
@@ skipping 39 matching lines @@
   buffer->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
   buffer->length = v4l2_planes_.size();
 
   static const struct v4l2_plane empty_plane = {};
   std::fill(v4l2_planes_.begin(), v4l2_planes_.end(), empty_plane);
   buffer->m.planes = v4l2_planes_.data();
 }
 
 void V4L2CaptureDelegateMultiPlane::SendBuffer(
     const scoped_refptr<BufferTracker>& buffer_tracker,
-    const v4l2_format& format) const {
+    const v4l2_format& format,
+    size_t /*bytes_used*/) const {
   DCHECK_EQ(capture_format().pixel_format, PIXEL_FORMAT_I420);
   const size_t y_stride = format.fmt.pix_mp.plane_fmt[0].bytesperline;
   const size_t u_stride = format.fmt.pix_mp.plane_fmt[1].bytesperline;
   const size_t v_stride = format.fmt.pix_mp.plane_fmt[2].bytesperline;
   DCHECK_GE(y_stride, 1u * capture_format().frame_size.width());
   DCHECK_GE(u_stride, 1u * capture_format().frame_size.width() / 2);
   DCHECK_GE(v_stride, 1u * capture_format().frame_size.width() / 2);
   client()->OnIncomingCapturedYuvData(buffer_tracker->GetPlaneStart(0),
                                       buffer_tracker->GetPlaneStart(1),
                                       buffer_tracker->GetPlaneStart(2),
@@ skipping 19 matching lines @@
       return false;
     }
     AddMmapedPlane(static_cast<uint8_t*>(start), buffer.m.planes[p].length);
     DVLOG(3) << "Mmap()ed plane #" << p << " of " << buffer.m.planes[p].length
              << "B";
   }
   return true;
 }
 
 }  // namespace media