VideoCapture: Remove deep frame copy in the border to libJingle

media/base/video_frame.cc

 // 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.
 
 #include "media/base/video_frame.h"
 
 #include <algorithm>
 
 #include "base/bind.h"
 #include "base/callback_helpers.h"
@@ skipping 868 matching lines @@
 
 int VideoFrame::rows(size_t plane) const {
   return Rows(plane, format_, coded_size_.height());
 }
 
 uint8* VideoFrame::data(size_t plane) const {
   DCHECK(IsValidPlane(plane, format_));
   return data_[plane];
 }
 
+uint8* VideoFrame::visible_data(size_t plane) const {
+  uint8* coded_data = data(plane);
+  const int coded_stride = stride(plane);
+  switch (plane) {
+    case kYPlane:
+    case kAPlane:
+      return coded_data + visible_rect_.y() * coded_stride + visible_rect_.x();
+    case kUPlane:
+    case kVPlane:
+      return coded_data + visible_rect_.y() / 2 * coded_stride +
+             visible_rect_.x() / 2;
+    default:
+      NOTIMPLEMENTED();
+      return NULL;
+  }
+}
+
 const gpu::MailboxHolder* VideoFrame::mailbox_holder() const {
   DCHECK_EQ(format_, NATIVE_TEXTURE);
   return mailbox_holder_.get();
 }
 
 base::SharedMemoryHandle VideoFrame::shared_memory_handle() const {
   return shared_memory_handle_;
 }
 
 void VideoFrame::UpdateReleaseSyncPoint(SyncPointClient* client) {
@@ skipping 25 matching lines @@
       break;
     for (int row = 0; row < rows(plane); ++row) {
       base::MD5Update(context, base::StringPiece(
           reinterpret_cast<char*>(data(plane) + stride(plane) * row),
           row_bytes(plane)));
     }
   }
 }
 
 }  // namespace media