remoting/codec/video_encoder.h

   1 // Copyright (c) 2012 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_H_
   6 #define REMOTING_CODEC_VIDEO_ENCODER_H_
   7
   8 #include "base/memory/scoped_ptr.h"
   9
  10 namespace webrtc {
  11 class DesktopFrame;
  12 }  // namespace webrtc
  13
  14 namespace remoting {
  15
  16 class VideoPacket;
  17
  18 // A class to perform the task of encoding a continuous stream of images. The
  19 // interface is asynchronous to enable maximum throughput.
  20 class VideoEncoder {
  21  public:
  22   virtual ~VideoEncoder() {}
  23
  24   // Request that the encoder provide lossless encoding, or color, if possible.
  25   virtual void SetLosslessEncode(bool want_lossless) {}
  26   virtual void SetLosslessColor(bool want_lossless) {}
  27
  28   // Encode an image stored in |frame|. If |frame.updated_region()| is empty
  29   // then the encoder may return a packet (e.g. to top-off previously-encoded
  30   // portions of the frame to higher quality) or return nullptr to indicate that
  31   // there is no work to do.
  32   virtual scoped_ptr<VideoPacket> Encode(const webrtc::DesktopFrame& frame) = 0;
  33 };
  34
  35 }  // namespace remoting
  36
  37 #endif  // REMOTING_CODEC_VIDEO_ENCODER_H_