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 <stdint.h>
9 
10 #include <memory>
11 
12 namespace webrtc {
13 class DesktopFrame;
14 }  // namespace webrtc
15 
16 namespace remoting {
17 namespace protocol {
18 class SessionConfig;
19 }  // namespace protocol
20 class VideoPacket;
21 
22 // A class to perform the task of encoding a continuous stream of images. The
23 // interface is asynchronous to enable maximum throughput.
24 class VideoEncoder {
25  public:
~VideoEncoder()26   virtual ~VideoEncoder() {}
27 
28   // Request that the encoder provide lossless encoding, or color, if possible.
SetLosslessEncode(bool want_lossless)29   virtual void SetLosslessEncode(bool want_lossless) {}
SetLosslessColor(bool want_lossless)30   virtual void SetLosslessColor(bool want_lossless) {}
31 
32   // Encode an image stored in |frame|. If |frame.updated_region()| is empty
33   // then the encoder may return a packet (e.g. to top-off previously-encoded
34   // portions of the frame to higher quality) or return nullptr to indicate that
35   // there is no work to do.
36   virtual std::unique_ptr<VideoPacket> Encode(
37       const webrtc::DesktopFrame& frame) = 0;
38 
39   static std::unique_ptr<VideoEncoder> Create(
40       const protocol::SessionConfig& config);
41 };
42 
43 }  // namespace remoting
44 
45 #endif  // REMOTING_CODEC_VIDEO_ENCODER_H_
46