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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 #include "remoting/host/video_scheduler.h" | 5 #include "remoting/host/video_scheduler.h" |
6 | 6 |
7 #include <algorithm> | 7 #include <algorithm> |
8 | 8 |
9 #include "base/bind.h" | 9 #include "base/bind.h" |
10 #include "base/callback.h" | 10 #include "base/callback.h" |
11 #include "base/logging.h" | 11 #include "base/logging.h" |
12 #include "base/memory/scoped_ptr.h" | 12 #include "base/memory/scoped_ptr.h" |
13 #include "base/message_loop_proxy.h" | 13 #include "base/message_loop_proxy.h" |
14 #include "base/stl_util.h" | 14 #include "base/stl_util.h" |
15 #include "base/sys_info.h" | 15 #include "base/sys_info.h" |
16 #include "base/time.h" | 16 #include "base/time.h" |
17 #include "media/video/capture/screen/mouse_cursor_shape.h" | 17 #include "media/video/capture/screen/mouse_cursor_shape.h" |
18 #include "media/video/capture/screen/screen_capture_data.h" | |
19 #include "media/video/capture/screen/screen_capturer.h" | 18 #include "media/video/capture/screen/screen_capturer.h" |
20 #include "remoting/proto/control.pb.h" | 19 #include "remoting/proto/control.pb.h" |
21 #include "remoting/proto/internal.pb.h" | 20 #include "remoting/proto/internal.pb.h" |
22 #include "remoting/proto/video.pb.h" | 21 #include "remoting/proto/video.pb.h" |
23 #include "remoting/protocol/cursor_shape_stub.h" | 22 #include "remoting/protocol/cursor_shape_stub.h" |
24 #include "remoting/protocol/message_decoder.h" | 23 #include "remoting/protocol/message_decoder.h" |
25 #include "remoting/protocol/video_stub.h" | 24 #include "remoting/protocol/video_stub.h" |
26 #include "remoting/protocol/util.h" | 25 #include "remoting/protocol/util.h" |
| 26 #include "third_party/webrtc/modules/desktop_capture/desktop_frame.h" |
27 | 27 |
28 namespace remoting { | 28 namespace remoting { |
29 | 29 |
30 // Maximum number of frames that can be processed simultaneously. | 30 // Maximum number of frames that can be processed simultaneously. |
31 // TODO(hclam): Move this value to CaptureScheduler. | 31 // TODO(hclam): Move this value to CaptureScheduler. |
32 static const int kMaxPendingCaptures = 2; | 32 static const int kMaxPendingFrames = 2; |
33 | 33 |
34 VideoScheduler::VideoScheduler( | 34 VideoScheduler::VideoScheduler( |
35 scoped_refptr<base::SingleThreadTaskRunner> capture_task_runner, | 35 scoped_refptr<base::SingleThreadTaskRunner> capture_task_runner, |
36 scoped_refptr<base::SingleThreadTaskRunner> encode_task_runner, | 36 scoped_refptr<base::SingleThreadTaskRunner> encode_task_runner, |
37 scoped_refptr<base::SingleThreadTaskRunner> network_task_runner, | 37 scoped_refptr<base::SingleThreadTaskRunner> network_task_runner, |
38 scoped_ptr<media::ScreenCapturer> capturer, | 38 scoped_ptr<media::ScreenCapturer> capturer, |
39 scoped_ptr<VideoEncoder> encoder, | 39 scoped_ptr<VideoEncoder> encoder, |
40 protocol::CursorShapeStub* cursor_stub, | 40 protocol::CursorShapeStub* cursor_stub, |
41 protocol::VideoStub* video_stub) | 41 protocol::VideoStub* video_stub) |
42 : capture_task_runner_(capture_task_runner), | 42 : capture_task_runner_(capture_task_runner), |
43 encode_task_runner_(encode_task_runner), | 43 encode_task_runner_(encode_task_runner), |
44 network_task_runner_(network_task_runner), | 44 network_task_runner_(network_task_runner), |
45 capturer_(capturer.Pass()), | 45 capturer_(capturer.Pass()), |
46 encoder_(encoder.Pass()), | 46 encoder_(encoder.Pass()), |
47 cursor_stub_(cursor_stub), | 47 cursor_stub_(cursor_stub), |
48 video_stub_(video_stub), | 48 video_stub_(video_stub), |
49 pending_captures_(0), | 49 pending_frames_(0), |
| 50 capture_pending_(false), |
50 did_skip_frame_(false), | 51 did_skip_frame_(false), |
51 is_paused_(false), | 52 is_paused_(false), |
52 sequence_number_(0) { | 53 sequence_number_(0) { |
53 DCHECK(network_task_runner_->BelongsToCurrentThread()); | 54 DCHECK(network_task_runner_->BelongsToCurrentThread()); |
54 DCHECK(capturer_); | 55 DCHECK(capturer_); |
55 DCHECK(encoder_); | 56 DCHECK(encoder_); |
56 DCHECK(cursor_stub_); | 57 DCHECK(cursor_stub_); |
57 DCHECK(video_stub_); | 58 DCHECK(video_stub_); |
58 } | 59 } |
59 | 60 |
60 // Public methods -------------------------------------------------------------- | 61 // Public methods -------------------------------------------------------------- |
61 | 62 |
62 void VideoScheduler::OnCaptureCompleted( | 63 webrtc::SharedMemory* VideoScheduler::CreateSharedMemory(size_t size) { |
63 scoped_refptr<media::ScreenCaptureData> capture_data) { | 64 return NULL; |
| 65 } |
| 66 |
| 67 void VideoScheduler::OnCaptureCompleted(webrtc::DesktopFrame* frame) { |
64 DCHECK(capture_task_runner_->BelongsToCurrentThread()); | 68 DCHECK(capture_task_runner_->BelongsToCurrentThread()); |
65 | 69 |
66 // Do nothing if the scheduler is being stopped. | 70 capture_pending_ = false; |
67 if (!capturer_) | |
68 return; | |
69 | 71 |
70 if (capture_data) { | 72 scoped_ptr<webrtc::DesktopFrame> owned_frame(frame); |
| 73 |
| 74 if (frame) { |
71 scheduler_.RecordCaptureTime( | 75 scheduler_.RecordCaptureTime( |
72 base::TimeDelta::FromMilliseconds(capture_data->capture_time_ms())); | 76 base::TimeDelta::FromMilliseconds(frame->capture_time_ms())); |
73 | |
74 // The best way to get this value is by binding the sequence number to | |
75 // the callback when calling CaptureInvalidRects(). However the callback | |
76 // system doesn't allow this. Reading from the member variable is | |
77 // accurate as long as capture is synchronous as the following statement | |
78 // will obtain the most recent sequence number received. | |
79 capture_data->set_client_sequence_number(sequence_number_); | |
80 } | 77 } |
81 | 78 |
82 encode_task_runner_->PostTask( | 79 encode_task_runner_->PostTask( |
83 FROM_HERE, base::Bind(&VideoScheduler::EncodeFrame, this, capture_data)); | 80 FROM_HERE, base::Bind(&VideoScheduler::EncodeFrame, this, |
| 81 base::Passed(&owned_frame), sequence_number_)); |
| 82 |
| 83 // If a frame was skipped, try to capture it again. |
| 84 if (did_skip_frame_) { |
| 85 capture_task_runner_->PostTask( |
| 86 FROM_HERE, base::Bind(&VideoScheduler::CaptureNextFrame, this)); |
| 87 } |
84 } | 88 } |
85 | 89 |
86 void VideoScheduler::OnCursorShapeChanged( | 90 void VideoScheduler::OnCursorShapeChanged( |
87 scoped_ptr<media::MouseCursorShape> cursor_shape) { | 91 scoped_ptr<media::MouseCursorShape> cursor_shape) { |
88 DCHECK(capture_task_runner_->BelongsToCurrentThread()); | 92 DCHECK(capture_task_runner_->BelongsToCurrentThread()); |
89 | 93 |
90 // Do nothing if the scheduler is being stopped. | 94 // Do nothing if the scheduler is being stopped. |
91 if (!capturer_) | 95 if (!capturer_) |
92 return; | 96 return; |
93 | 97 |
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156 VideoScheduler::~VideoScheduler() { | 160 VideoScheduler::~VideoScheduler() { |
157 } | 161 } |
158 | 162 |
159 // Capturer thread ------------------------------------------------------------- | 163 // Capturer thread ------------------------------------------------------------- |
160 | 164 |
161 void VideoScheduler::StartOnCaptureThread() { | 165 void VideoScheduler::StartOnCaptureThread() { |
162 DCHECK(capture_task_runner_->BelongsToCurrentThread()); | 166 DCHECK(capture_task_runner_->BelongsToCurrentThread()); |
163 DCHECK(!capture_timer_); | 167 DCHECK(!capture_timer_); |
164 | 168 |
165 // Start the capturer and let it notify us if cursor shape changes. | 169 // Start the capturer and let it notify us if cursor shape changes. |
| 170 capturer_->SetMouseShapeObserver(this); |
166 capturer_->Start(this); | 171 capturer_->Start(this); |
167 | 172 |
168 capture_timer_.reset(new base::OneShotTimer<VideoScheduler>()); | 173 capture_timer_.reset(new base::OneShotTimer<VideoScheduler>()); |
169 | 174 |
170 // Capture first frame immedately. | 175 // Capture first frame immedately. |
171 CaptureNextFrame(); | 176 CaptureNextFrame(); |
172 } | 177 } |
173 | 178 |
174 void VideoScheduler::StopOnCaptureThread() { | 179 void VideoScheduler::StopOnCaptureThread() { |
175 DCHECK(capture_task_runner_->BelongsToCurrentThread()); | 180 DCHECK(capture_task_runner_->BelongsToCurrentThread()); |
176 | 181 |
| 182 // This doesn't deleted already captured frames, so encoder can keep using the |
| 183 // frames that were captured previously. |
| 184 capturer_.reset(); |
| 185 |
177 // |capture_timer_| must be destroyed on the thread on which it is used. | 186 // |capture_timer_| must be destroyed on the thread on which it is used. |
178 capture_timer_.reset(); | 187 capture_timer_.reset(); |
179 | |
180 // Schedule deletion of |capturer_| once the encode thread is no longer | |
181 // processing capture data. See http://crbug.com/163641. This also clears | |
182 // |capturer_| pointer to prevent pending tasks from using it. | |
183 // TODO(wez): Make it safe to tear down capturer while buffers remain, and | |
184 // remove this work-around. | |
185 encode_task_runner_->PostTask( | |
186 FROM_HERE, base::Bind(&VideoScheduler::StopOnEncodeThread, this, | |
187 base::Passed(&capturer_))); | |
188 } | 188 } |
189 | 189 |
190 void VideoScheduler::ScheduleNextCapture() { | 190 void VideoScheduler::ScheduleNextCapture() { |
191 DCHECK(capture_task_runner_->BelongsToCurrentThread()); | 191 DCHECK(capture_task_runner_->BelongsToCurrentThread()); |
192 | 192 |
193 capture_timer_->Start(FROM_HERE, | 193 capture_timer_->Start(FROM_HERE, |
194 scheduler_.NextCaptureDelay(), | 194 scheduler_.NextCaptureDelay(), |
195 this, | 195 this, |
196 &VideoScheduler::CaptureNextFrame); | 196 &VideoScheduler::CaptureNextFrame); |
197 } | 197 } |
198 | 198 |
199 void VideoScheduler::CaptureNextFrame() { | 199 void VideoScheduler::CaptureNextFrame() { |
200 DCHECK(capture_task_runner_->BelongsToCurrentThread()); | 200 DCHECK(capture_task_runner_->BelongsToCurrentThread()); |
201 | 201 |
202 // If we are stopping (|capturer_| is NULL), or paused, then don't capture. | 202 // If we are stopping (|capturer_| is NULL), or paused, then don't capture. |
203 if (!capturer_ || is_paused_) | 203 if (!capturer_ || is_paused_) |
204 return; | 204 return; |
205 | 205 |
206 // Make sure we have at most two oustanding recordings. We can simply return | 206 // Make sure we have at most two outstanding recordings. We can simply return |
207 // if we can't make a capture now, the next capture will be started by the | 207 // if we can't make a capture now, the next capture will be started by the |
208 // end of an encode operation. | 208 // end of an encode operation. |
209 if (pending_captures_ >= kMaxPendingCaptures) { | 209 if (pending_frames_ >= kMaxPendingFrames || capture_pending_) { |
210 did_skip_frame_ = true; | 210 did_skip_frame_ = true; |
211 return; | 211 return; |
212 } | 212 } |
213 | 213 |
214 did_skip_frame_ = false; | 214 did_skip_frame_ = false; |
215 | 215 |
216 // At this point we are going to perform one capture so save the current time. | 216 // At this point we are going to perform one capture so save the current time. |
217 pending_captures_++; | 217 pending_frames_++; |
218 DCHECK_LE(pending_captures_, kMaxPendingCaptures); | 218 DCHECK_LE(pending_frames_, kMaxPendingFrames); |
219 | 219 |
220 // Before doing a capture schedule for the next one. | 220 // Before doing a capture schedule for the next one. |
221 ScheduleNextCapture(); | 221 ScheduleNextCapture(); |
222 | 222 |
| 223 capture_pending_ = true; |
| 224 |
223 // And finally perform one capture. | 225 // And finally perform one capture. |
224 capturer_->CaptureFrame(); | 226 capturer_->Capture(webrtc::DesktopRegion()); |
225 } | 227 } |
226 | 228 |
227 void VideoScheduler::FrameCaptureCompleted() { | 229 void VideoScheduler::FrameCaptureCompleted() { |
228 DCHECK(capture_task_runner_->BelongsToCurrentThread()); | 230 DCHECK(capture_task_runner_->BelongsToCurrentThread()); |
229 | 231 |
230 // Decrement the pending capture count. | 232 // Decrement the pending capture count. |
231 pending_captures_--; | 233 pending_frames_--; |
232 DCHECK_GE(pending_captures_, 0); | 234 DCHECK_GE(pending_frames_, 0); |
233 | 235 |
234 // If we've skipped a frame capture because too we had too many captures | 236 // If we've skipped a frame capture because too we had too many captures |
235 // pending then schedule one now. | 237 // pending then schedule one now. |
236 if (did_skip_frame_) | 238 if (did_skip_frame_) |
237 CaptureNextFrame(); | 239 CaptureNextFrame(); |
238 } | 240 } |
239 | 241 |
240 // Network thread -------------------------------------------------------------- | 242 // Network thread -------------------------------------------------------------- |
241 | 243 |
242 void VideoScheduler::SendVideoPacket(scoped_ptr<VideoPacket> packet) { | 244 void VideoScheduler::SendVideoPacket(scoped_ptr<VideoPacket> packet) { |
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268 | 270 |
269 if (!cursor_stub_) | 271 if (!cursor_stub_) |
270 return; | 272 return; |
271 | 273 |
272 cursor_stub_->SetCursorShape(*cursor_shape); | 274 cursor_stub_->SetCursorShape(*cursor_shape); |
273 } | 275 } |
274 | 276 |
275 // Encoder thread -------------------------------------------------------------- | 277 // Encoder thread -------------------------------------------------------------- |
276 | 278 |
277 void VideoScheduler::EncodeFrame( | 279 void VideoScheduler::EncodeFrame( |
278 scoped_refptr<media::ScreenCaptureData> capture_data) { | 280 scoped_ptr<webrtc::DesktopFrame> frame, |
| 281 int sequence_number) { |
279 DCHECK(encode_task_runner_->BelongsToCurrentThread()); | 282 DCHECK(encode_task_runner_->BelongsToCurrentThread()); |
280 | 283 |
281 // If there is nothing to encode then send an empty keep-alive packet. | 284 // If there is nothing to encode then send an empty keep-alive packet. |
282 if (!capture_data || capture_data->dirty_region().isEmpty()) { | 285 if (!frame || frame->updated_region().is_empty()) { |
283 scoped_ptr<VideoPacket> packet(new VideoPacket()); | 286 scoped_ptr<VideoPacket> packet(new VideoPacket()); |
284 packet->set_flags(VideoPacket::LAST_PARTITION); | 287 packet->set_flags(VideoPacket::LAST_PARTITION); |
| 288 packet->set_sequence_number(sequence_number); |
285 network_task_runner_->PostTask( | 289 network_task_runner_->PostTask( |
286 FROM_HERE, base::Bind(&VideoScheduler::SendVideoPacket, this, | 290 FROM_HERE, base::Bind(&VideoScheduler::SendVideoPacket, this, |
287 base::Passed(&packet))); | 291 base::Passed(&packet))); |
| 292 capture_task_runner_->DeleteSoon(FROM_HERE, frame.release()); |
288 return; | 293 return; |
289 } | 294 } |
290 | 295 |
291 encoder_->Encode( | 296 encoder_->Encode( |
292 capture_data, false, | 297 frame.get(), base::Bind(&VideoScheduler::EncodedDataAvailableCallback, |
293 base::Bind(&VideoScheduler::EncodedDataAvailableCallback, this)); | 298 this, sequence_number)); |
| 299 capture_task_runner_->DeleteSoon(FROM_HERE, frame.release()); |
294 } | 300 } |
295 | 301 |
296 void VideoScheduler::EncodedDataAvailableCallback( | 302 void VideoScheduler::EncodedDataAvailableCallback( |
| 303 int sequence_number, |
297 scoped_ptr<VideoPacket> packet) { | 304 scoped_ptr<VideoPacket> packet) { |
298 DCHECK(encode_task_runner_->BelongsToCurrentThread()); | 305 DCHECK(encode_task_runner_->BelongsToCurrentThread()); |
299 | 306 |
| 307 packet->set_sequence_number(sequence_number); |
| 308 |
300 bool last = (packet->flags() & VideoPacket::LAST_PACKET) != 0; | 309 bool last = (packet->flags() & VideoPacket::LAST_PACKET) != 0; |
301 if (last) { | 310 if (last) { |
302 scheduler_.RecordEncodeTime( | 311 scheduler_.RecordEncodeTime( |
303 base::TimeDelta::FromMilliseconds(packet->encode_time_ms())); | 312 base::TimeDelta::FromMilliseconds(packet->encode_time_ms())); |
304 } | 313 } |
305 | 314 |
306 network_task_runner_->PostTask( | 315 network_task_runner_->PostTask( |
307 FROM_HERE, base::Bind(&VideoScheduler::SendVideoPacket, this, | 316 FROM_HERE, base::Bind(&VideoScheduler::SendVideoPacket, this, |
308 base::Passed(&packet))); | 317 base::Passed(&packet))); |
309 } | 318 } |
310 | 319 |
311 void VideoScheduler::StopOnEncodeThread( | |
312 scoped_ptr<media::ScreenCapturer> capturer) { | |
313 DCHECK(encode_task_runner_->BelongsToCurrentThread()); | |
314 | |
315 // This is posted by StopOnCaptureThread, so we know that by the time we | |
316 // process it there are no more encode tasks queued. Pass |capturer| for | |
317 // deletion on the capture thread. | |
318 capture_task_runner_->DeleteSoon(FROM_HERE, capturer.release()); | |
319 } | |
320 | |
321 } // namespace remoting | 320 } // namespace remoting |
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