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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_VIDEO_SCHEDULER_H_ | 5 #ifndef REMOTING_HOST_VIDEO_SCHEDULER_H_ |
| 6 #define REMOTING_HOST_VIDEO_SCHEDULER_H_ | 6 #define REMOTING_HOST_VIDEO_SCHEDULER_H_ |
| 7 | 7 |
| 8 #include <vector> | 8 #include <vector> |
| 9 | 9 |
| 10 #include "base/basictypes.h" | 10 #include "base/basictypes.h" |
| 11 #include "base/memory/ref_counted.h" | 11 #include "base/memory/ref_counted.h" |
| 12 #include "base/memory/scoped_ptr.h" | 12 #include "base/memory/scoped_ptr.h" |
| 13 #include "base/time.h" | 13 #include "base/time.h" |
| 14 #include "base/timer.h" | 14 #include "base/timer.h" |
| 15 #include "media/video/capture/screen/screen_capturer.h" | |
| 16 #include "remoting/codec/video_encoder.h" | 15 #include "remoting/codec/video_encoder.h" |
| 17 #include "remoting/host/capture_scheduler.h" | 16 #include "remoting/host/capture_scheduler.h" |
| 18 #include "remoting/proto/video.pb.h" | 17 #include "remoting/proto/video.pb.h" |
| 19 #include "third_party/skia/include/core/SkSize.h" | 18 #include "third_party/skia/include/core/SkSize.h" |
| 19 #include "third_party/webrtc/modules/desktop_capture/screen_capturer.h" |
| 20 | 20 |
| 21 namespace base { | 21 namespace base { |
| 22 class SingleThreadTaskRunner; | 22 class SingleThreadTaskRunner; |
| 23 } // namespace base | 23 } // namespace base |
| 24 | 24 |
| 25 namespace media { | 25 namespace media { |
| 26 class ScreenCapturer; | 26 class ScreenCapturer; |
| 27 } // namespace media | 27 } // namespace media |
| 28 | 28 |
| 29 namespace remoting { | 29 namespace remoting { |
| 30 | 30 |
| 31 class CursorShapeInfo; | 31 class CursorShapeInfo; |
| 32 | 32 |
| 33 namespace protocol { | 33 namespace protocol { |
| 34 class CursorShapeInfo; | 34 class CursorShapeInfo; |
| 35 class CursorShapeStub; | 35 class CursorShapeStub; |
| 36 class VideoStub; | 36 class VideoStub; |
| 37 } // namespace protocol | 37 } // namespace protocol |
| 38 | 38 |
| 39 // Class responsible for scheduling frame captures from a media::ScreenCapturer, | 39 // Class responsible for scheduling frame captures from a |
| 40 // delivering them to a VideoEncoder to encode, and finally passing the encoded | 40 // webrtc::ScreenCapturer, delivering them to a VideoEncoder to encode, and |
| 41 // video packets to the specified VideoStub to send on the network. | 41 // finally passing the encoded video packets to the specified VideoStub to send |
| 42 // on the network. |
| 42 // | 43 // |
| 43 // THREADING | 44 // THREADING |
| 44 // | 45 // |
| 45 // This class is supplied TaskRunners to use for capture, encode and network | 46 // This class is supplied TaskRunners to use for capture, encode and network |
| 46 // operations. Capture, encode and network transmission tasks are interleaved | 47 // operations. Capture, encode and network transmission tasks are interleaved |
| 47 // as illustrated below: | 48 // as illustrated below: |
| 48 // | 49 // |
| 49 // | CAPTURE ENCODE NETWORK | 50 // | CAPTURE ENCODE NETWORK |
| 50 // | ............. | 51 // | ............. |
| 51 // | . Capture . | 52 // | . Capture . |
| (...skipping 15 matching lines...) Expand all Loading... |
| 67 // | Time | 68 // | Time |
| 68 // v | 69 // v |
| 69 // | 70 // |
| 70 // VideoScheduler would ideally schedule captures so as to saturate the slowest | 71 // VideoScheduler would ideally schedule captures so as to saturate the slowest |
| 71 // of the capture, encode and network processes. However, it also needs to | 72 // of the capture, encode and network processes. However, it also needs to |
| 72 // rate-limit captures to avoid overloading the host system, either by consuming | 73 // rate-limit captures to avoid overloading the host system, either by consuming |
| 73 // too much CPU, or hogging the host's graphics subsystem. | 74 // too much CPU, or hogging the host's graphics subsystem. |
| 74 | 75 |
| 75 class VideoScheduler : public base::RefCountedThreadSafe<VideoScheduler>, | 76 class VideoScheduler : public base::RefCountedThreadSafe<VideoScheduler>, |
| 76 public webrtc::DesktopCapturer::Callback, | 77 public webrtc::DesktopCapturer::Callback, |
| 77 public media::ScreenCapturer::MouseShapeObserver { | 78 public webrtc::ScreenCapturer::MouseShapeObserver { |
| 78 public: | 79 public: |
| 79 // Creates a VideoScheduler running capture, encode and network tasks on the | 80 // Creates a VideoScheduler running capture, encode and network tasks on the |
| 80 // supplied TaskRunners. Video and cursor shape updates will be pumped to | 81 // supplied TaskRunners. Video and cursor shape updates will be pumped to |
| 81 // |video_stub| and |client_stub|, which must remain valid until Stop() is | 82 // |video_stub| and |client_stub|, which must remain valid until Stop() is |
| 82 // called. |capturer| is used to capture frames. | 83 // called. |capturer| is used to capture frames. |
| 83 VideoScheduler( | 84 VideoScheduler( |
| 84 scoped_refptr<base::SingleThreadTaskRunner> capture_task_runner, | 85 scoped_refptr<base::SingleThreadTaskRunner> capture_task_runner, |
| 85 scoped_refptr<base::SingleThreadTaskRunner> encode_task_runner, | 86 scoped_refptr<base::SingleThreadTaskRunner> encode_task_runner, |
| 86 scoped_refptr<base::SingleThreadTaskRunner> network_task_runner, | 87 scoped_refptr<base::SingleThreadTaskRunner> network_task_runner, |
| 87 scoped_ptr<media::ScreenCapturer> capturer, | 88 scoped_ptr<webrtc::ScreenCapturer> capturer, |
| 88 scoped_ptr<VideoEncoder> encoder, | 89 scoped_ptr<VideoEncoder> encoder, |
| 89 protocol::CursorShapeStub* cursor_stub, | 90 protocol::CursorShapeStub* cursor_stub, |
| 90 protocol::VideoStub* video_stub); | 91 protocol::VideoStub* video_stub); |
| 91 | 92 |
| 92 // webrtc::DesktopCapturer::Callback implementation. | 93 // webrtc::DesktopCapturer::Callback implementation. |
| 93 virtual webrtc::SharedMemory* CreateSharedMemory(size_t size) OVERRIDE; | 94 virtual webrtc::SharedMemory* CreateSharedMemory(size_t size) OVERRIDE; |
| 94 virtual void OnCaptureCompleted(webrtc::DesktopFrame* frame) OVERRIDE; | 95 virtual void OnCaptureCompleted(webrtc::DesktopFrame* frame) OVERRIDE; |
| 95 | 96 |
| 96 // media::ScreenCapturer::MouseShapeObserver implementation. | 97 // webrtc::ScreenCapturer::MouseShapeObserver implementation. |
| 97 virtual void OnCursorShapeChanged( | 98 virtual void OnCursorShapeChanged( |
| 98 scoped_ptr<media::MouseCursorShape> cursor_shape) OVERRIDE; | 99 webrtc::MouseCursorShape* cursor_shape) OVERRIDE; |
| 99 | 100 |
| 100 // Starts scheduling frame captures. | 101 // Starts scheduling frame captures. |
| 101 void Start(); | 102 void Start(); |
| 102 | 103 |
| 103 // Stop scheduling frame captures. This object cannot be re-used once | 104 // Stop scheduling frame captures. This object cannot be re-used once |
| 104 // it has been stopped. | 105 // it has been stopped. |
| 105 void Stop(); | 106 void Stop(); |
| 106 | 107 |
| 107 // Pauses or resumes scheduling of frame captures. Pausing/resuming captures | 108 // Pauses or resumes scheduling of frame captures. Pausing/resuming captures |
| 108 // only affects capture scheduling and does not stop/start the capturer. | 109 // only affects capture scheduling and does not stop/start the capturer. |
| (...skipping 44 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... |
| 153 | 154 |
| 154 void EncodedDataAvailableCallback(int sequence_number, | 155 void EncodedDataAvailableCallback(int sequence_number, |
| 155 scoped_ptr<VideoPacket> packet); | 156 scoped_ptr<VideoPacket> packet); |
| 156 | 157 |
| 157 // Task runners used by this class. | 158 // Task runners used by this class. |
| 158 scoped_refptr<base::SingleThreadTaskRunner> capture_task_runner_; | 159 scoped_refptr<base::SingleThreadTaskRunner> capture_task_runner_; |
| 159 scoped_refptr<base::SingleThreadTaskRunner> encode_task_runner_; | 160 scoped_refptr<base::SingleThreadTaskRunner> encode_task_runner_; |
| 160 scoped_refptr<base::SingleThreadTaskRunner> network_task_runner_; | 161 scoped_refptr<base::SingleThreadTaskRunner> network_task_runner_; |
| 161 | 162 |
| 162 // Used to capture frames. Always accessed on the capture thread. | 163 // Used to capture frames. Always accessed on the capture thread. |
| 163 scoped_ptr<media::ScreenCapturer> capturer_; | 164 scoped_ptr<webrtc::ScreenCapturer> capturer_; |
| 164 | 165 |
| 165 // Used to encode captured frames. Always accessed on the encode thread. | 166 // Used to encode captured frames. Always accessed on the encode thread. |
| 166 scoped_ptr<VideoEncoder> encoder_; | 167 scoped_ptr<VideoEncoder> encoder_; |
| 167 | 168 |
| 168 // Interfaces through which video frames and cursor shapes are passed to the | 169 // Interfaces through which video frames and cursor shapes are passed to the |
| 169 // client. These members are always accessed on the network thread. | 170 // client. These members are always accessed on the network thread. |
| 170 protocol::CursorShapeStub* cursor_stub_; | 171 protocol::CursorShapeStub* cursor_stub_; |
| 171 protocol::VideoStub* video_stub_; | 172 protocol::VideoStub* video_stub_; |
| 172 | 173 |
| 173 // Timer used to schedule CaptureNextFrame(). | 174 // Timer used to schedule CaptureNextFrame(). |
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| 192 | 193 |
| 193 // An object to schedule capturing. | 194 // An object to schedule capturing. |
| 194 CaptureScheduler scheduler_; | 195 CaptureScheduler scheduler_; |
| 195 | 196 |
| 196 DISALLOW_COPY_AND_ASSIGN(VideoScheduler); | 197 DISALLOW_COPY_AND_ASSIGN(VideoScheduler); |
| 197 }; | 198 }; |
| 198 | 199 |
| 199 } // namespace remoting | 200 } // namespace remoting |
| 200 | 201 |
| 201 #endif // REMOTING_HOST_VIDEO_SCHEDULER_H_ | 202 #endif // REMOTING_HOST_VIDEO_SCHEDULER_H_ |
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