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Side by Side Diff: remoting/host/screen_recorder.h

Issue 10790075: Rename Capturer to VideoFrameCapturer. (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: rebased. Created 8 years, 5 months ago
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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 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 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 REMOTING_HOST_SCREEN_RECORDER_H_ 5 #ifndef REMOTING_HOST_SCREEN_RECORDER_H_
6 #define REMOTING_HOST_SCREEN_RECORDER_H_ 6 #define REMOTING_HOST_SCREEN_RECORDER_H_
7 7
8 #include <vector> 8 #include <vector>
9 9
10 #include "base/basictypes.h" 10 #include "base/basictypes.h"
11 #include "base/callback.h" 11 #include "base/callback.h"
12 #include "base/memory/ref_counted.h" 12 #include "base/memory/ref_counted.h"
13 #include "base/memory/scoped_ptr.h" 13 #include "base/memory/scoped_ptr.h"
14 #include "base/time.h" 14 #include "base/time.h"
15 #include "base/timer.h" 15 #include "base/timer.h"
16 #include "remoting/base/encoder.h" 16 #include "remoting/base/encoder.h"
17 #include "remoting/host/capturer.h"
18 #include "remoting/host/capture_scheduler.h" 17 #include "remoting/host/capture_scheduler.h"
19 #include "remoting/proto/video.pb.h" 18 #include "remoting/proto/video.pb.h"
20 19
21 namespace base { 20 namespace base {
22 class SingleThreadTaskRunner; 21 class SingleThreadTaskRunner;
23 } // namespace base 22 } // namespace base
24 23
25 namespace remoting { 24 namespace remoting {
26 25
26 class CaptureData;
27 class VideoFrameCapturer;
28
27 namespace protocol { 29 namespace protocol {
28 class ConnectionToClient; 30 class ConnectionToClient;
29 class CursorShapeInfo; 31 class CursorShapeInfo;
30 } // namespace protocol 32 } // namespace protocol
31 33
32 class CaptureData; 34 // A class for controlling and coordinate VideoFrameCapturer, Encoder
33
34 // A class for controlling and coordinate Capturer, Encoder
35 // and NetworkChannel in a record session. 35 // and NetworkChannel in a record session.
36 // 36 //
37 // THREADING 37 // THREADING
38 // 38 //
39 // This class works on three threads, namely capture, encode and network 39 // This class works on three threads, namely capture, encode and network
40 // thread. The main function of this class is to coordinate and schedule 40 // thread. The main function of this class is to coordinate and schedule
41 // capture, encode and transmission of data on different threads. 41 // capture, encode and transmission of data on different threads.
42 // 42 //
43 // The following is an example of timeline for operations scheduled. 43 // The following is an example of timeline for operations scheduled.
44 // 44 //
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68 // 2. Make sure there is at most one outstanding capture not being encoded. 68 // 2. Make sure there is at most one outstanding capture not being encoded.
69 // 3. Distribute tasks on three threads on a timely fashion to minimize latency. 69 // 3. Distribute tasks on three threads on a timely fashion to minimize latency.
70 // 70 //
71 // This class has the following state variables: 71 // This class has the following state variables:
72 // |capture_timer_| - If this is set to NULL there should be no activity on 72 // |capture_timer_| - If this is set to NULL there should be no activity on
73 // the capture thread by this object. 73 // the capture thread by this object.
74 // |network_stopped_| - This state is to prevent activity on the network thread 74 // |network_stopped_| - This state is to prevent activity on the network thread
75 // if set to false. 75 // if set to false.
76 class ScreenRecorder : public base::RefCountedThreadSafe<ScreenRecorder> { 76 class ScreenRecorder : public base::RefCountedThreadSafe<ScreenRecorder> {
77 public: 77 public:
78
79 // Construct a ScreenRecorder. Message loops and threads are provided. 78 // Construct a ScreenRecorder. Message loops and threads are provided.
80 // This object does not own capturer but owns encoder. 79 // This object does not own capturer but owns encoder.
81 ScreenRecorder( 80 ScreenRecorder(
82 scoped_refptr<base::SingleThreadTaskRunner> capture_task_runner, 81 scoped_refptr<base::SingleThreadTaskRunner> capture_task_runner,
83 scoped_refptr<base::SingleThreadTaskRunner> encode_task_runner, 82 scoped_refptr<base::SingleThreadTaskRunner> encode_task_runner,
84 scoped_refptr<base::SingleThreadTaskRunner> network_task_runner, 83 scoped_refptr<base::SingleThreadTaskRunner> network_task_runner,
85 Capturer* capturer, 84 VideoFrameCapturer* capturer,
86 Encoder* encoder); 85 Encoder* encoder);
87 86
88 // Start recording. 87 // Start recording.
89 void Start(); 88 void Start();
90 89
91 // Stop the recording session. |done_task| is executed when recording is fully 90 // Stop the recording session. |done_task| is executed when recording is fully
92 // stopped. This object cannot be used again after |task| is executed. 91 // stopped. This object cannot be used again after |task| is executed.
93 void Stop(const base::Closure& done_task); 92 void Stop(const base::Closure& done_task);
94 93
95 // Add a connection to this recording session. 94 // Add a connection to this recording session.
96 void AddConnection(protocol::ConnectionToClient* connection); 95 void AddConnection(protocol::ConnectionToClient* connection);
97 96
98 // Remove a connection from receiving screen updates. 97 // Remove a connection from receiving screen updates.
99 void RemoveConnection(protocol::ConnectionToClient* connection); 98 void RemoveConnection(protocol::ConnectionToClient* connection);
100 99
101 // Remove all connections. 100 // Remove all connections.
102 void RemoveAllConnections(); 101 void RemoveAllConnections();
103 102
104 // Update the sequence number for tracing performance. 103 // Update the sequence number for tracing performance.
105 void UpdateSequenceNumber(int64 sequence_number); 104 void UpdateSequenceNumber(int64 sequence_number);
106 105
107 private: 106 private:
108 friend class base::RefCountedThreadSafe<ScreenRecorder>; 107 friend class base::RefCountedThreadSafe<ScreenRecorder>;
109 virtual ~ScreenRecorder(); 108 virtual ~ScreenRecorder();
110 109
111 // Getters for capturer and encoder. 110 // Getters for capturer and encoder.
112 Capturer* capturer(); 111 VideoFrameCapturer* capturer();
113 Encoder* encoder(); 112 Encoder* encoder();
114 113
115 bool is_recording(); 114 bool is_recording();
116 115
117 // Capturer thread ---------------------------------------------------------- 116 // Capturer thread ----------------------------------------------------------
118 117
119 void DoStart(); 118 void DoStart();
120 void DoSetMaxRate(double max_rate); 119 void DoSetMaxRate(double max_rate);
121 120
122 // Hepler method to schedule next capture using the current rate. 121 // Hepler method to schedule next capture using the current rate.
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156 void EncodedDataAvailableCallback(scoped_ptr<VideoPacket> packet); 155 void EncodedDataAvailableCallback(scoped_ptr<VideoPacket> packet);
157 void SendVideoPacket(VideoPacket* packet); 156 void SendVideoPacket(VideoPacket* packet);
158 157
159 // Task runners used by this class. 158 // Task runners used by this class.
160 scoped_refptr<base::SingleThreadTaskRunner> capture_task_runner_; 159 scoped_refptr<base::SingleThreadTaskRunner> capture_task_runner_;
161 scoped_refptr<base::SingleThreadTaskRunner> encode_task_runner_; 160 scoped_refptr<base::SingleThreadTaskRunner> encode_task_runner_;
162 scoped_refptr<base::SingleThreadTaskRunner> network_task_runner_; 161 scoped_refptr<base::SingleThreadTaskRunner> network_task_runner_;
163 162
164 // Reference to the capturer. This member is always accessed on the capture 163 // Reference to the capturer. This member is always accessed on the capture
165 // thread. 164 // thread.
166 Capturer* capturer_; 165 VideoFrameCapturer* capturer_;
167 166
168 // Reference to the encoder. This member is always accessed on the encode 167 // Reference to the encoder. This member is always accessed on the encode
169 // thread. 168 // thread.
170 scoped_ptr<Encoder> encoder_; 169 scoped_ptr<Encoder> encoder_;
171 170
172 // A list of clients connected to this hosts. 171 // A list of clients connected to this hosts.
173 // This member is always accessed on the network thread. 172 // This member is always accessed on the network thread.
174 typedef std::vector<protocol::ConnectionToClient*> ConnectionToClientList; 173 typedef std::vector<protocol::ConnectionToClient*> ConnectionToClientList;
175 ConnectionToClientList connections_; 174 ConnectionToClientList connections_;
176 175
(...skipping 26 matching lines...) Expand all
203 202
204 // An object to schedule capturing. 203 // An object to schedule capturing.
205 CaptureScheduler scheduler_; 204 CaptureScheduler scheduler_;
206 205
207 DISALLOW_COPY_AND_ASSIGN(ScreenRecorder); 206 DISALLOW_COPY_AND_ASSIGN(ScreenRecorder);
208 }; 207 };
209 208
210 } // namespace remoting 209 } // namespace remoting
211 210
212 #endif // REMOTING_HOST_SCREEN_RECORDER_H_ 211 #endif // REMOTING_HOST_SCREEN_RECORDER_H_
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