remoting/codec/video_encoder_helper.h

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef REMOTING_CODEC_VIDEO_ENCODER_HELPER_H_
   6 #define REMOTING_CODEC_VIDEO_ENCODER_HELPER_H_
   7
   8 #include "base/memory/scoped_ptr.h"
   9 #include "third_party/webrtc/modules/desktop_capture/desktop_geometry.h"
  10
  11 namespace webrtc {
  12 class DesktopFrame;
  13 class DesktopRegion;
  14 }
  15
  16 namespace remoting {
  17
  18 class VideoPacket;
  19
  20 class VideoEncoderHelper {
  21  public:
  22   VideoEncoderHelper();
  23
  24   // Returns a new VideoPacket with common fields (e.g. capture_time_ms, rects
  25   // list, frame shape if any) initialized based on the supplied |frame|.
  26   // Screen width and height will be set iff |frame|'s size differs from that
  27   // of the previously-supplied frame.
  28   scoped_ptr<VideoPacket> CreateVideoPacket(const webrtc::DesktopFrame& frame);
  29
  30   // Returns a new VideoPacket with the common fields populated from |frame|,
  31   // but the updated rects overridden by |updated_region|. This is useful for
  32   // encoders which alter the updated region e.g. by expanding it to macroblock
  33   // boundaries.
  34   scoped_ptr<VideoPacket> CreateVideoPacketWithUpdatedRegion(
  35       const webrtc::DesktopFrame& frame,
  36       const webrtc::DesktopRegion& updated_region);
  37  private:
  38   // The most recent screen size. Used to detect screen size changes.
  39   webrtc::DesktopSize screen_size_;
  40
  41   DISALLOW_COPY_AND_ASSIGN(VideoEncoderHelper);
  42 };
  43
  44 }  // namespace remoting
  45
  46 #endif  // REMOTING_CODEC_VIDEO_ENCODER_HELPER_H_