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1 // Copyright 2014 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef MEDIA_CAST_SENDER_VIDEO_ENCODER_H_ | 5 #ifndef MEDIA_CAST_SENDER_VIDEO_ENCODER_H_ |
6 #define MEDIA_CAST_SENDER_VIDEO_ENCODER_H_ | 6 #define MEDIA_CAST_SENDER_VIDEO_ENCODER_H_ |
7 | 7 |
| 8 #include <memory> |
| 9 |
8 #include "base/callback.h" | 10 #include "base/callback.h" |
9 #include "base/memory/ref_counted.h" | 11 #include "base/memory/ref_counted.h" |
10 #include "base/memory/scoped_ptr.h" | |
11 #include "base/time/time.h" | 12 #include "base/time/time.h" |
12 #include "media/base/video_frame.h" | 13 #include "media/base/video_frame.h" |
13 #include "media/cast/cast_config.h" | 14 #include "media/cast/cast_config.h" |
14 #include "media/cast/cast_environment.h" | 15 #include "media/cast/cast_environment.h" |
15 #include "media/cast/cast_sender.h" | 16 #include "media/cast/cast_sender.h" |
16 #include "media/cast/sender/sender_encoded_frame.h" | 17 #include "media/cast/sender/sender_encoded_frame.h" |
17 #include "media/cast/sender/video_frame_factory.h" | 18 #include "media/cast/sender/video_frame_factory.h" |
18 | 19 |
19 namespace media { | 20 namespace media { |
20 namespace cast { | 21 namespace cast { |
21 | 22 |
22 // All these functions are called from the main cast thread. | 23 // All these functions are called from the main cast thread. |
23 class VideoEncoder { | 24 class VideoEncoder { |
24 public: | 25 public: |
25 // Callback used to deliver an encoded frame on the Cast MAIN thread. | 26 // Callback used to deliver an encoded frame on the Cast MAIN thread. |
26 using FrameEncodedCallback = | 27 using FrameEncodedCallback = |
27 base::Callback<void(scoped_ptr<SenderEncodedFrame>)>; | 28 base::Callback<void(std::unique_ptr<SenderEncodedFrame>)>; |
28 | 29 |
29 // Creates a VideoEncoder instance from the given |video_config| and based on | 30 // Creates a VideoEncoder instance from the given |video_config| and based on |
30 // the current platform's hardware/library support; or null if no | 31 // the current platform's hardware/library support; or null if no |
31 // implementation will suffice. The instance will run |status_change_cb| at | 32 // implementation will suffice. The instance will run |status_change_cb| at |
32 // some point in the future to indicate initialization success/failure. | 33 // some point in the future to indicate initialization success/failure. |
33 // | 34 // |
34 // All VideoEncoder instances returned by this function support encoding | 35 // All VideoEncoder instances returned by this function support encoding |
35 // sequences of differently-size VideoFrames. | 36 // sequences of differently-size VideoFrames. |
36 // | 37 // |
37 // TODO(miu): Remove the CreateVEA callbacks. http://crbug.com/454029 | 38 // TODO(miu): Remove the CreateVEA callbacks. http://crbug.com/454029 |
38 static scoped_ptr<VideoEncoder> Create( | 39 static std::unique_ptr<VideoEncoder> Create( |
39 const scoped_refptr<CastEnvironment>& cast_environment, | 40 const scoped_refptr<CastEnvironment>& cast_environment, |
40 const VideoSenderConfig& video_config, | 41 const VideoSenderConfig& video_config, |
41 const StatusChangeCallback& status_change_cb, | 42 const StatusChangeCallback& status_change_cb, |
42 const CreateVideoEncodeAcceleratorCallback& create_vea_cb, | 43 const CreateVideoEncodeAcceleratorCallback& create_vea_cb, |
43 const CreateVideoEncodeMemoryCallback& create_video_encode_memory_cb); | 44 const CreateVideoEncodeMemoryCallback& create_video_encode_memory_cb); |
44 | 45 |
45 virtual ~VideoEncoder() {} | 46 virtual ~VideoEncoder() {} |
46 | 47 |
47 // If true is returned, the Encoder has accepted the request and will process | 48 // If true is returned, the Encoder has accepted the request and will process |
48 // it asynchronously, running |frame_encoded_callback| on the MAIN | 49 // it asynchronously, running |frame_encoded_callback| on the MAIN |
49 // CastEnvironment thread with the result. If false is returned, nothing | 50 // CastEnvironment thread with the result. If false is returned, nothing |
50 // happens and the callback will not be run. | 51 // happens and the callback will not be run. |
51 virtual bool EncodeVideoFrame( | 52 virtual bool EncodeVideoFrame( |
52 const scoped_refptr<media::VideoFrame>& video_frame, | 53 const scoped_refptr<media::VideoFrame>& video_frame, |
53 const base::TimeTicks& reference_time, | 54 const base::TimeTicks& reference_time, |
54 const FrameEncodedCallback& frame_encoded_callback) = 0; | 55 const FrameEncodedCallback& frame_encoded_callback) = 0; |
55 | 56 |
56 // Inform the encoder about the new target bit rate. | 57 // Inform the encoder about the new target bit rate. |
57 virtual void SetBitRate(int new_bit_rate) = 0; | 58 virtual void SetBitRate(int new_bit_rate) = 0; |
58 | 59 |
59 // Inform the encoder to encode the next frame as a key frame. | 60 // Inform the encoder to encode the next frame as a key frame. |
60 virtual void GenerateKeyFrame() = 0; | 61 virtual void GenerateKeyFrame() = 0; |
61 | 62 |
62 // Creates a |VideoFrameFactory| object to vend |VideoFrame| object with | 63 // Creates a |VideoFrameFactory| object to vend |VideoFrame| object with |
63 // encoder affinity (defined as offering some sort of performance benefit). | 64 // encoder affinity (defined as offering some sort of performance benefit). |
64 // This is an optional capability and by default returns null. | 65 // This is an optional capability and by default returns null. |
65 virtual scoped_ptr<VideoFrameFactory> CreateVideoFrameFactory(); | 66 virtual std::unique_ptr<VideoFrameFactory> CreateVideoFrameFactory(); |
66 | 67 |
67 // Instructs the encoder to finish and emit all frames that have been | 68 // Instructs the encoder to finish and emit all frames that have been |
68 // submitted for encoding. An encoder may hold a certain number of frames for | 69 // submitted for encoding. An encoder may hold a certain number of frames for |
69 // analysis. Under certain network conditions, particularly when there is | 70 // analysis. Under certain network conditions, particularly when there is |
70 // network congestion, it is necessary to flush out of the encoder all | 71 // network congestion, it is necessary to flush out of the encoder all |
71 // submitted frames so that eventually new frames may be encoded. Like | 72 // submitted frames so that eventually new frames may be encoded. Like |
72 // EncodeVideoFrame(), the encoder will process this request asynchronously. | 73 // EncodeVideoFrame(), the encoder will process this request asynchronously. |
73 virtual void EmitFrames(); | 74 virtual void EmitFrames(); |
74 }; | 75 }; |
75 | 76 |
76 } // namespace cast | 77 } // namespace cast |
77 } // namespace media | 78 } // namespace media |
78 | 79 |
79 #endif // MEDIA_CAST_SENDER_VIDEO_ENCODER_H_ | 80 #endif // MEDIA_CAST_SENDER_VIDEO_ENCODER_H_ |
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