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 MEDIA_CAST_SENDER_VIDEO_ENCODER_H_
6#define MEDIA_CAST_SENDER_VIDEO_ENCODER_H_
7
8#include "base/callback.h"
9#include "base/memory/ref_counted.h"
10#include "base/memory/scoped_ptr.h"
11#include "base/memory/weak_ptr.h"
12#include "base/time/time.h"
13#include "media/base/video_frame.h"
14#include "media/cast/cast_config.h"
15#include "media/cast/cast_environment.h"
16
17namespace media {
18namespace cast {
19
20// All these functions are called from the main cast thread.
21class VideoEncoder {
22 public:
23  typedef base::Callback<void(scoped_ptr<EncodedFrame>)>
24      FrameEncodedCallback;
25
26  virtual ~VideoEncoder() {}
27
28  // The video_frame must be valid until the closure callback is called.
29  // The closure callback is called from the video encoder thread as soon as
30  // the encoder is done with the frame; it does not mean that the encoded frame
31  // has been sent out.
32  // Once the encoded frame is ready the frame_encoded_callback is called.
33  virtual bool EncodeVideoFrame(
34      const scoped_refptr<media::VideoFrame>& video_frame,
35      const base::TimeTicks& capture_time,
36      const FrameEncodedCallback& frame_encoded_callback) = 0;
37
38  // Inform the encoder about the new target bit rate.
39  virtual void SetBitRate(int new_bit_rate) = 0;
40
41  // Inform the encoder to encode the next frame as a key frame.
42  virtual void GenerateKeyFrame() = 0;
43
44  // Inform the encoder to only reference frames older or equal to frame_id;
45  virtual void LatestFrameIdToReference(uint32 frame_id) = 0;
46};
47
48}  // namespace cast
49}  // namespace media
50
51#endif  // MEDIA_CAST_SENDER_VIDEO_ENCODER_H_
52