Add I420Buffer::Copy method taking plane pointers as input.

webrtc/common_video/include/video_frame_buffer.h

 /*
  *  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 40 matching lines @@
   // native handle.
   virtual rtc::scoped_refptr<VideoFrameBuffer> NativeToI420Buffer() = 0;
 
  protected:
   virtual ~VideoFrameBuffer();
 };
 
 // Plain I420 buffer in standard memory.
 class I420Buffer : public VideoFrameBuffer {
  public:
-  I420Buffer(int width, int height);
-  I420Buffer(int width, int height, int stride_y, int stride_u, int stride_v);
-
   static rtc::scoped_refptr<I420Buffer> Create(int width, int height);
   static rtc::scoped_refptr<I420Buffer> Create(int width,
                                                int height,
                                                int stride_y,
                                                int stride_u,
                                                int stride_v);
 
+  // Create a new buffer and copy the pixel data.
+  static rtc::scoped_refptr<I420Buffer> Copy(const VideoFrameBuffer& buffer);
+
+  static rtc::scoped_refptr<I420Buffer> Copy(
+      int width, int height,
+      const uint8_t* data_y, int stride_y,
+      const uint8_t* data_u, int stride_u,
+      const uint8_t* data_v, int stride_v);
+
+  // Returns a rotated versions of |src|. Native buffers are not
+  // supported. The reason this function doesn't return an I420Buffer,
+  // is that it returns |src| unchanged in case |rotation| is zero.
+  // TODO(nisse): Consider dropping the special handling of zero
+  // rotation, and leave any optimizing that case to the caller.
+  static rtc::scoped_refptr<VideoFrameBuffer> Rotate(
+      rtc::scoped_refptr<VideoFrameBuffer> src,
+      VideoRotation rotation);
+
   // Sets all three planes to all zeros. Used to work around for
   // quirks in memory checkers
   // (https://bugs.chromium.org/p/libyuv/issues/detail?id=377) and
   // ffmpeg (http://crbug.com/390941).
   // TODO(nisse): Should be deleted if/when those issues are resolved
   // in a better way.
   void InitializeData();
 
   // Sets the frame buffer to all black.
   void SetToBlack();
 
   int width() const override;
   int height() const override;
   const uint8_t* DataY() const override;
   const uint8_t* DataU() const override;
   const uint8_t* DataV() const override;
 
   uint8_t* MutableDataY();
   uint8_t* MutableDataU();
   uint8_t* MutableDataV();
   int StrideY() const override;
   int StrideU() const override;
   int StrideV() const override;
 
   void* native_handle() const override;
   rtc::scoped_refptr<VideoFrameBuffer> NativeToI420Buffer() override;
 
-  // Create a new buffer and copy the pixel data.
-  static rtc::scoped_refptr<I420Buffer> Copy(const VideoFrameBuffer& buffer);
-
   // Scale the cropped area of |src| to the size of |this| buffer, and
   // write the result into |this|.
   void CropAndScaleFrom(const VideoFrameBuffer& src,
                         int offset_x,
                         int offset_y,
                         int crop_width,
                         int crop_height);
 
   // The common case of a center crop, when needed to adjust the
   // aspect ratio without distorting the image.
@@ skipping 15 matching lines @@
                         int crop_height) {
     CropAndScaleFrom(*src, offset_x, offset_y, crop_width, crop_height);
   }
   void CropAndScaleFrom(const rtc::scoped_refptr<VideoFrameBuffer>& src) {
     CropAndScaleFrom(*src);
   }
   void ScaleFrom(const rtc::scoped_refptr<VideoFrameBuffer>& src) {
     ScaleFrom(*src);
   }
 
-  // Returns a rotated versions of |src|. Native buffers are not
-  // supported. The reason this function doesn't return an I420Buffer,
-  // is that it returns |src| unchanged in case |rotation| is zero.
-  static rtc::scoped_refptr<VideoFrameBuffer> Rotate(
-      rtc::scoped_refptr<VideoFrameBuffer> src,
-      VideoRotation rotation);
+ protected:
+  I420Buffer(int width, int height);
+  I420Buffer(int width, int height, int stride_y, int stride_u, int stride_v);
 
- protected:
   ~I420Buffer() override;
 
  private:
   const int width_;
   const int height_;
   const int stride_y_;
   const int stride_u_;
   const int stride_v_;
   const std::unique_ptr<uint8_t, AlignedFreeDeleter> data_;
 };
@@ skipping 59 matching lines @@
   const uint8_t* const v_plane_;
   const int y_stride_;
   const int u_stride_;
   const int v_stride_;
   rtc::Callback0<void> no_longer_used_cb_;
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_COMMON_VIDEO_INCLUDE_VIDEO_FRAME_BUFFER_H_