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1 // Copyright 2013 The Chromium Authors. All rights reserved. | 1 // Copyright 2013 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_VIDEO_SENDER_VIDEO_SENDER_H_ | 5 #ifndef MEDIA_CAST_SENDER_VIDEO_SENDER_H_ |
6 #define MEDIA_CAST_VIDEO_SENDER_VIDEO_SENDER_H_ | 6 #define MEDIA_CAST_SENDER_VIDEO_SENDER_H_ |
7 | 7 |
8 #include "base/callback.h" | 8 #include "base/callback.h" |
9 #include "base/memory/ref_counted.h" | 9 #include "base/memory/ref_counted.h" |
10 #include "base/memory/scoped_ptr.h" | 10 #include "base/memory/scoped_ptr.h" |
11 #include "base/memory/weak_ptr.h" | 11 #include "base/memory/weak_ptr.h" |
12 #include "base/threading/non_thread_safe.h" | 12 #include "base/threading/non_thread_safe.h" |
13 #include "base/time/tick_clock.h" | 13 #include "base/time/tick_clock.h" |
14 #include "base/time/time.h" | 14 #include "base/time/time.h" |
15 #include "media/cast/cast_config.h" | 15 #include "media/cast/cast_config.h" |
16 #include "media/cast/cast_environment.h" | 16 #include "media/cast/cast_environment.h" |
17 #include "media/cast/congestion_control/congestion_control.h" | |
18 #include "media/cast/logging/logging_defines.h" | 17 #include "media/cast/logging/logging_defines.h" |
19 #include "media/cast/rtcp/rtcp.h" | 18 #include "media/cast/net/rtcp/rtcp.h" |
20 #include "media/cast/rtp_timestamp_helper.h" | 19 #include "media/cast/sender/congestion_control.h" |
| 20 #include "media/cast/sender/rtp_timestamp_helper.h" |
21 | 21 |
22 namespace media { | 22 namespace media { |
23 | 23 |
24 class VideoFrame; | 24 class VideoFrame; |
25 | 25 |
26 namespace cast { | 26 namespace cast { |
27 | 27 |
| 28 class CastTransportSender; |
28 class LocalVideoEncoderCallback; | 29 class LocalVideoEncoderCallback; |
29 class VideoEncoder; | 30 class VideoEncoder; |
30 | 31 |
31 namespace transport { | |
32 class CastTransportSender; | |
33 } | |
34 | |
35 // Not thread safe. Only called from the main cast thread. | 32 // Not thread safe. Only called from the main cast thread. |
36 // This class owns all objects related to sending video, objects that create RTP | 33 // This class owns all objects related to sending video, objects that create RTP |
37 // packets, congestion control, video encoder, parsing and sending of | 34 // packets, congestion control, video encoder, parsing and sending of |
38 // RTCP packets. | 35 // RTCP packets. |
39 // Additionally it posts a bunch of delayed tasks to the main thread for various | 36 // Additionally it posts a bunch of delayed tasks to the main thread for various |
40 // timeouts. | 37 // timeouts. |
41 class VideoSender : public RtcpSenderFeedback, | 38 class VideoSender : public RtcpSenderFeedback, |
42 public base::NonThreadSafe, | 39 public base::NonThreadSafe, |
43 public base::SupportsWeakPtr<VideoSender> { | 40 public base::SupportsWeakPtr<VideoSender> { |
44 public: | 41 public: |
45 VideoSender(scoped_refptr<CastEnvironment> cast_environment, | 42 VideoSender(scoped_refptr<CastEnvironment> cast_environment, |
46 const VideoSenderConfig& video_config, | 43 const VideoSenderConfig& video_config, |
47 const CreateVideoEncodeAcceleratorCallback& create_vea_cb, | 44 const CreateVideoEncodeAcceleratorCallback& create_vea_cb, |
48 const CreateVideoEncodeMemoryCallback& create_video_encode_mem_cb, | 45 const CreateVideoEncodeMemoryCallback& create_video_encode_mem_cb, |
49 transport::CastTransportSender* const transport_sender); | 46 CastTransportSender* const transport_sender); |
50 | 47 |
51 virtual ~VideoSender(); | 48 virtual ~VideoSender(); |
52 | 49 |
53 CastInitializationStatus InitializationResult() const { | 50 CastInitializationStatus InitializationResult() const { |
54 return cast_initialization_status_; | 51 return cast_initialization_status_; |
55 } | 52 } |
56 | 53 |
57 // Note: It is not guaranteed that |video_frame| will actually be encoded and | 54 // Note: It is not guaranteed that |video_frame| will actually be encoded and |
58 // sent, if VideoSender detects too many frames in flight. Therefore, clients | 55 // sent, if VideoSender detects too many frames in flight. Therefore, clients |
59 // should be careful about the rate at which this method is called. | 56 // should be careful about the rate at which this method is called. |
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86 void ResendForKickstart(); | 83 void ResendForKickstart(); |
87 | 84 |
88 // Returns true if there are too many frames in flight, as defined by the | 85 // Returns true if there are too many frames in flight, as defined by the |
89 // configured target playout delay plus simple logic. When this is true, | 86 // configured target playout delay plus simple logic. When this is true, |
90 // InsertRawVideoFrame() will silenty drop frames instead of sending them to | 87 // InsertRawVideoFrame() will silenty drop frames instead of sending them to |
91 // the video encoder. | 88 // the video encoder. |
92 bool AreTooManyFramesInFlight() const; | 89 bool AreTooManyFramesInFlight() const; |
93 | 90 |
94 // Called by the |video_encoder_| with the next EncodeFrame to send. | 91 // Called by the |video_encoder_| with the next EncodeFrame to send. |
95 void SendEncodedVideoFrame(int requested_bitrate_before_encode, | 92 void SendEncodedVideoFrame(int requested_bitrate_before_encode, |
96 scoped_ptr<transport::EncodedFrame> encoded_frame); | 93 scoped_ptr<EncodedFrame> encoded_frame); |
97 | 94 |
98 const scoped_refptr<CastEnvironment> cast_environment_; | 95 const scoped_refptr<CastEnvironment> cast_environment_; |
99 | 96 |
100 // The total amount of time between a frame's capture/recording on the sender | 97 // The total amount of time between a frame's capture/recording on the sender |
101 // and its playback on the receiver (i.e., shown to a user). This is fixed as | 98 // and its playback on the receiver (i.e., shown to a user). This is fixed as |
102 // a value large enough to give the system sufficient time to encode, | 99 // a value large enough to give the system sufficient time to encode, |
103 // transmit/retransmit, receive, decode, and render; given its run-time | 100 // transmit/retransmit, receive, decode, and render; given its run-time |
104 // environment (sender/receiver hardware performance, network conditions, | 101 // environment (sender/receiver hardware performance, network conditions, |
105 // etc.). | 102 // etc.). |
106 const base::TimeDelta target_playout_delay_; | 103 const base::TimeDelta target_playout_delay_; |
107 | 104 |
108 // Sends encoded frames over the configured transport (e.g., UDP). In | 105 // Sends encoded frames over the configured transport (e.g., UDP). In |
109 // Chromium, this could be a proxy that first sends the frames from a renderer | 106 // Chromium, this could be a proxy that first sends the frames from a renderer |
110 // process to the browser process over IPC, with the browser process being | 107 // process to the browser process over IPC, with the browser process being |
111 // responsible for "packetizing" the frames and pushing packets into the | 108 // responsible for "packetizing" the frames and pushing packets into the |
112 // network layer. | 109 // network layer. |
113 transport::CastTransportSender* const transport_sender_; | 110 CastTransportSender* const transport_sender_; |
114 | 111 |
115 // Maximum number of outstanding frames before the encoding and sending of | 112 // Maximum number of outstanding frames before the encoding and sending of |
116 // new frames shall halt. | 113 // new frames shall halt. |
117 const int max_unacked_frames_; | 114 const int max_unacked_frames_; |
118 | 115 |
119 // Encodes media::VideoFrame images into EncodedFrames. Per configuration, | 116 // Encodes media::VideoFrame images into EncodedFrames. Per configuration, |
120 // this will point to either the internal software-based encoder or a proxy to | 117 // this will point to either the internal software-based encoder or a proxy to |
121 // a hardware-based encoder. | 118 // a hardware-based encoder. |
122 scoped_ptr<VideoEncoder> video_encoder_; | 119 scoped_ptr<VideoEncoder> video_encoder_; |
123 | 120 |
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172 | 169 |
173 // NOTE: Weak pointers must be invalidated before all other member variables. | 170 // NOTE: Weak pointers must be invalidated before all other member variables. |
174 base::WeakPtrFactory<VideoSender> weak_factory_; | 171 base::WeakPtrFactory<VideoSender> weak_factory_; |
175 | 172 |
176 DISALLOW_COPY_AND_ASSIGN(VideoSender); | 173 DISALLOW_COPY_AND_ASSIGN(VideoSender); |
177 }; | 174 }; |
178 | 175 |
179 } // namespace cast | 176 } // namespace cast |
180 } // namespace media | 177 } // namespace media |
181 | 178 |
182 #endif // MEDIA_CAST_VIDEO_SENDER_VIDEO_SENDER_H_ | 179 #endif // MEDIA_CAST_SENDER_VIDEO_SENDER_H_ |
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