Rewrite CreateBlackFrame in webrtcvideoengine.

webrtc/common_video/video_frame_buffer.cc

 /*
  *  Copyright (c) 2015 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 116 matching lines @@
   RTC_DCHECK_GT(width, 0);
   RTC_DCHECK_GT(height, 0);
   RTC_DCHECK_GE(stride_y, width);
   RTC_DCHECK_GE(stride_u, (width + 1) / 2);
   RTC_DCHECK_GE(stride_v, (width + 1) / 2);
 }
 
 I420Buffer::~I420Buffer() {
 }
 
+rtc::scoped_refptr<I420Buffer> I420Buffer::Create(int width, int height) {
+  return new rtc::RefCountedObject<I420Buffer>(width, height);
+}
+
+rtc::scoped_refptr<I420Buffer> I420Buffer::Create(int width,
+                                                  int height,
+                                                  int stride_y,
+                                                  int stride_u,
+                                                  int stride_v) {
+  return new rtc::RefCountedObject<I420Buffer>(
+      width, height, stride_y, stride_u, stride_v);
+}
+
 void I420Buffer::InitializeData() {
   memset(data_.get(), 0,
          I420DataSize(height_, stride_y_, stride_u_, stride_v_));
 }
 
 int I420Buffer::width() const {
   return width_;
 }
 
 int I420Buffer::height() const {
@@ skipping 36 matching lines @@
 
 rtc::scoped_refptr<VideoFrameBuffer> I420Buffer::NativeToI420Buffer() {
   RTC_NOTREACHED();
   return nullptr;
 }
 
 rtc::scoped_refptr<I420Buffer> I420Buffer::Copy(
     const rtc::scoped_refptr<VideoFrameBuffer>& source) {
   int width = source->width();
   int height = source->height();
-  rtc::scoped_refptr<I420Buffer> target =
-      new rtc::RefCountedObject<I420Buffer>(width, height);
+  rtc::scoped_refptr<I420Buffer> target = I420Buffer::Create(width, height);
   RTC_CHECK(libyuv::I420Copy(source->DataY(), source->StrideY(),
                              source->DataU(), source->StrideU(),
                              source->DataV(), source->StrideV(),
                              target->MutableDataY(), target->StrideY(),
                              target->MutableDataU(), target->StrideU(),
                              target->MutableDataV(), target->StrideV(),
                              width, height) == 0);
 
   return target;
 }
@@ skipping 61 matching lines @@
 }
 
 rtc::scoped_refptr<I420Buffer> I420Buffer::CopyKeepStride(
     const rtc::scoped_refptr<VideoFrameBuffer>& source) {
   int width = source->width();
   int height = source->height();
   int stride_y = source->StrideY();
   int stride_u = source->StrideU();
   int stride_v = source->StrideV();
   rtc::scoped_refptr<I420Buffer> target =
-      new rtc::RefCountedObject<I420Buffer>(
-          width, height, stride_y, stride_u, stride_v);
+      I420Buffer::Create(width, height, stride_y, stride_u, stride_v);
   RTC_CHECK(libyuv::I420Copy(source->DataY(), stride_y,
                              source->DataU(), stride_u,
                              source->DataV(), stride_v,
                              target->MutableDataY(), stride_y,
                              target->MutableDataU(), stride_u,
                              target->MutableDataV(), stride_v,
                              width, height) == 0);
 
   return target;
 }
@@ skipping 100 matching lines @@
 void* WrappedI420Buffer::native_handle() const {
   return nullptr;
 }
 
 rtc::scoped_refptr<VideoFrameBuffer> WrappedI420Buffer::NativeToI420Buffer() {
   RTC_NOTREACHED();
   return nullptr;
 }
 
 }  // namespace webrtc