Revert of Delete VideoFrameFactory, CapturedFrame, and related code.

webrtc/media/base/videoframefactory.cc

+/*
+ *  Copyright (c) 2014 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.
+ */
+
+#include "webrtc/media/base/videoframefactory.h"
+
+#include <algorithm>
+#include "webrtc/media/base/videocapturer.h"
+
+namespace cricket {
+
+VideoFrame* VideoFrameFactory::CreateAliasedFrame(
+    const CapturedFrame* input_frame,
+    int cropped_input_width,
+    int cropped_input_height,
+    int output_width,
+    int output_height) const {
+  std::unique_ptr<VideoFrame> cropped_input_frame(CreateAliasedFrame(
+      input_frame, cropped_input_width, cropped_input_height));
+  if (!cropped_input_frame)
+    return nullptr;
+
+  if (cropped_input_width == output_width &&
+      cropped_input_height == output_height) {
+    // No scaling needed.
+    return cropped_input_frame.release();
+  }
+
+  // If the frame is rotated, we need to switch the width and height.
+  if (apply_rotation_ &&
+      (input_frame->rotation == webrtc::kVideoRotation_90 ||
+       input_frame->rotation == webrtc::kVideoRotation_270)) {
+    std::swap(output_width, output_height);
+  }
+
+  rtc::scoped_refptr<webrtc::I420Buffer> scaled_buffer(
+      pool_.CreateBuffer(output_width, output_height));
+  scaled_buffer->CropAndScaleFrom(cropped_input_frame->video_frame_buffer());
+
+  return new WebRtcVideoFrame(scaled_buffer, cropped_input_frame->rotation(),
+                              cropped_input_frame->timestamp_us(),
+                              cropped_input_frame->transport_frame_id());
+}
+
+}  // namespace cricket