Revert of Delete VideoFrameFactory, CapturedFrame, and related code.

webrtc/media/base/videoframefactory.h

+/*
+ *  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.
+ */
+
+#ifndef WEBRTC_MEDIA_BASE_VIDEOFRAMEFACTORY_H_
+#define WEBRTC_MEDIA_BASE_VIDEOFRAMEFACTORY_H_
+
+#include <memory>
+
+#include "webrtc/common_video/include/i420_buffer_pool.h"
+#include "webrtc/media/base/videoframe.h"
+
+namespace cricket {
+
+struct CapturedFrame;
+class VideoFrame;
+
+// Creates cricket::VideoFrames, or a subclass of cricket::VideoFrame
+// depending on the subclass of VideoFrameFactory.
+class VideoFrameFactory {
+ public:
+  VideoFrameFactory() : apply_rotation_(false) {}
+  virtual ~VideoFrameFactory() {}
+
+  // The returned frame aliases the aliased_frame if the input color
+  // space allows for aliasing, otherwise a color conversion will
+  // occur. Returns NULL if conversion fails.
+
+  // The returned frame will be a center crop of |input_frame| with
+  // size |cropped_width| x |cropped_height|.
+  virtual VideoFrame* CreateAliasedFrame(const CapturedFrame* input_frame,
+                                         int cropped_width,
+                                         int cropped_height) const = 0;
+
+  // The returned frame will be a center crop of |input_frame| with size
+  // |cropped_width| x |cropped_height|, scaled to |output_width| x
+  // |output_height|.
+  virtual VideoFrame* CreateAliasedFrame(const CapturedFrame* input_frame,
+                                         int cropped_input_width,
+                                         int cropped_input_height,
+                                         int output_width,
+                                         int output_height) const;
+
+  void SetApplyRotation(bool enable) { apply_rotation_ = enable; }
+
+ protected:
+  bool apply_rotation_;
+
+ private:
+  // An internal pool to avoid reallocations. It is mutable because it
+  // does not affect behaviour, only performance.
+  mutable webrtc::I420BufferPool pool_;
+};
+
+}  // namespace cricket
+
+#endif  // WEBRTC_MEDIA_BASE_VIDEOFRAMEFACTORY_H_