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/basictypes.h"
   9 #include "base/callback.h"
  10 #include "media/base/data_buffer.h"
  11
  12 namespace media {
  13 class ScreenCaptureData;
  14 }  // namespace media
  15
  16 namespace remoting {
  17
  18 class VideoPacket;
  19
  20 // A class to perform the task of encoding a continous stream of
  21 // images.
  22 // This class operates asynchronously to enable maximum throughput.
  23 class VideoEncoder {
  24  public:
  25
  26   // DataAvailableCallback is called one or more times, for each chunk the
  27   // underlying video encoder generates.
  28   typedef base::Callback<void(scoped_ptr<VideoPacket>)> DataAvailableCallback;
  29
  30   virtual ~VideoEncoder() {}
  31
  32   // Encode an image stored in |capture_data|.
  33   //
  34   // If |key_frame| is true, the encoder should not reference
  35   // previous encode and encode the full frame.
  36   //
  37   // When encoded data is available, partial or full |data_available_callback|
  38   // is called.
  39   virtual void Encode(scoped_refptr<media::ScreenCaptureData> capture_data,
  40                       bool key_frame,
  41                       const DataAvailableCallback& data_available_callback) = 0;
  42 };
  43
  44 }  // namespace remoting
  45
  46 #endif  // REMOTING_CODEC_VIDEO_ENCODER_H_