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1 /* | 1 /* |
2 * Copyright (c) 2013 The WebRTC project authors. All Rights Reserved. | 2 * Copyright (c) 2013 The WebRTC project authors. All Rights Reserved. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license | 4 * Use of this source code is governed by a BSD-style license |
5 * that can be found in the LICENSE file in the root of the source | 5 * that can be found in the LICENSE file in the root of the source |
6 * tree. An additional intellectual property rights grant can be found | 6 * tree. An additional intellectual property rights grant can be found |
7 * in the file PATENTS. All contributing project authors may | 7 * in the file PATENTS. All contributing project authors may |
8 * be found in the AUTHORS file in the root of the source tree. | 8 * be found in the AUTHORS file in the root of the source tree. |
9 */ | 9 */ |
10 | 10 |
11 #include "webrtc/modules/desktop_capture/screen_capturer.h" | 11 #include "webrtc/modules/desktop_capture/screen_capturer.h" |
12 | 12 |
13 #include <string.h> | 13 #include <string.h> |
14 | 14 |
15 #include <memory> | 15 #include <memory> |
16 #include <set> | 16 #include <set> |
17 | 17 |
18 #include <X11/extensions/Xdamage.h> | 18 #include <X11/extensions/Xdamage.h> |
19 #include <X11/extensions/Xfixes.h> | 19 #include <X11/extensions/Xfixes.h> |
20 #include <X11/Xlib.h> | 20 #include <X11/Xlib.h> |
21 #include <X11/Xutil.h> | 21 #include <X11/Xutil.h> |
22 | 22 |
23 #include "webrtc/base/checks.h" | 23 #include "webrtc/base/checks.h" |
24 #include "webrtc/modules/desktop_capture/desktop_capture_options.h" | 24 #include "webrtc/modules/desktop_capture/desktop_capture_options.h" |
25 #include "webrtc/modules/desktop_capture/desktop_frame.h" | 25 #include "webrtc/modules/desktop_capture/desktop_frame.h" |
26 #include "webrtc/modules/desktop_capture/differ.h" | 26 #include "webrtc/modules/desktop_capture/differ.h" |
27 #include "webrtc/modules/desktop_capture/screen_capture_frame_queue.h" | 27 #include "webrtc/modules/desktop_capture/screen_capture_frame_queue.h" |
28 #include "webrtc/modules/desktop_capture/screen_capturer_helper.h" | 28 #include "webrtc/modules/desktop_capture/screen_capturer_helper.h" |
29 #include "webrtc/modules/desktop_capture/shared_desktop_frame.h" | |
30 #include "webrtc/modules/desktop_capture/x11/x_server_pixel_buffer.h" | 29 #include "webrtc/modules/desktop_capture/x11/x_server_pixel_buffer.h" |
31 #include "webrtc/system_wrappers/include/logging.h" | 30 #include "webrtc/system_wrappers/include/logging.h" |
32 #include "webrtc/system_wrappers/include/tick_util.h" | 31 #include "webrtc/system_wrappers/include/tick_util.h" |
33 | 32 |
34 namespace webrtc { | 33 namespace webrtc { |
35 namespace { | 34 namespace { |
36 | 35 |
37 // A class to perform video frame capturing for Linux. | 36 // A class to perform video frame capturing for Linux. |
38 class ScreenCapturerLinux : public ScreenCapturer, | 37 class ScreenCapturerLinux : public ScreenCapturer, |
39 public SharedXDisplay::XEventHandler { | 38 public SharedXDisplay::XEventHandler { |
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100 XserverRegion damage_region_; | 99 XserverRegion damage_region_; |
101 | 100 |
102 // Access to the X Server's pixel buffer. | 101 // Access to the X Server's pixel buffer. |
103 XServerPixelBuffer x_server_pixel_buffer_; | 102 XServerPixelBuffer x_server_pixel_buffer_; |
104 | 103 |
105 // A thread-safe list of invalid rectangles, and the size of the most | 104 // A thread-safe list of invalid rectangles, and the size of the most |
106 // recently captured screen. | 105 // recently captured screen. |
107 ScreenCapturerHelper helper_; | 106 ScreenCapturerHelper helper_; |
108 | 107 |
109 // Queue of the frames buffers. | 108 // Queue of the frames buffers. |
110 ScreenCaptureFrameQueue<SharedDesktopFrame> queue_; | 109 ScreenCaptureFrameQueue queue_; |
111 | 110 |
112 // Invalid region from the previous capture. This is used to synchronize the | 111 // Invalid region from the previous capture. This is used to synchronize the |
113 // current with the last buffer used. | 112 // current with the last buffer used. |
114 DesktopRegion last_invalid_region_; | 113 DesktopRegion last_invalid_region_; |
115 | 114 |
116 // |Differ| for use when polling for changes. | 115 // |Differ| for use when polling for changes. |
117 std::unique_ptr<Differ> differ_; | 116 std::unique_ptr<Differ> differ_; |
118 | 117 |
119 RTC_DISALLOW_COPY_AND_ASSIGN(ScreenCapturerLinux); | 118 RTC_DISALLOW_COPY_AND_ASSIGN(ScreenCapturerLinux); |
120 }; | 119 }; |
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231 RTC_DCHECK(!callback_); | 230 RTC_DCHECK(!callback_); |
232 RTC_DCHECK(callback); | 231 RTC_DCHECK(callback); |
233 | 232 |
234 callback_ = callback; | 233 callback_ = callback; |
235 } | 234 } |
236 | 235 |
237 void ScreenCapturerLinux::Capture(const DesktopRegion& region) { | 236 void ScreenCapturerLinux::Capture(const DesktopRegion& region) { |
238 TickTime capture_start_time = TickTime::Now(); | 237 TickTime capture_start_time = TickTime::Now(); |
239 | 238 |
240 queue_.MoveToNextFrame(); | 239 queue_.MoveToNextFrame(); |
241 RTC_DCHECK(!queue_.current_frame() || !queue_.current_frame()->IsShared()); | |
242 | 240 |
243 // Process XEvents for XDamage and cursor shape tracking. | 241 // Process XEvents for XDamage and cursor shape tracking. |
244 options_.x_display()->ProcessPendingXEvents(); | 242 options_.x_display()->ProcessPendingXEvents(); |
245 | 243 |
246 // ProcessPendingXEvents() may call ScreenConfigurationChanged() which | 244 // ProcessPendingXEvents() may call ScreenConfigurationChanged() which |
247 // reinitializes |x_server_pixel_buffer_|. Check if the pixel buffer is still | 245 // reinitializes |x_server_pixel_buffer_|. Check if the pixel buffer is still |
248 // in a good shape. | 246 // in a good shape. |
249 if (!x_server_pixel_buffer_.is_initialized()) { | 247 if (!x_server_pixel_buffer_.is_initialized()) { |
250 // We failed to initialize pixel buffer. | 248 // We failed to initialize pixel buffer. |
251 callback_->OnCaptureCompleted(NULL); | 249 callback_->OnCaptureCompleted(NULL); |
252 return; | 250 return; |
253 } | 251 } |
254 | 252 |
255 // If the current frame is from an older generation then allocate a new one. | 253 // If the current frame is from an older generation then allocate a new one. |
256 // Note that we can't reallocate other buffers at this point, since the caller | 254 // Note that we can't reallocate other buffers at this point, since the caller |
257 // may still be reading from them. | 255 // may still be reading from them. |
258 if (!queue_.current_frame()) { | 256 if (!queue_.current_frame()) { |
259 std::unique_ptr<DesktopFrame> frame( | 257 std::unique_ptr<DesktopFrame> frame( |
260 new BasicDesktopFrame(x_server_pixel_buffer_.window_size())); | 258 new BasicDesktopFrame(x_server_pixel_buffer_.window_size())); |
261 queue_.ReplaceCurrentFrame(SharedDesktopFrame::Wrap(frame.release())); | 259 queue_.ReplaceCurrentFrame(frame.release()); |
262 } | 260 } |
263 | 261 |
264 // Refresh the Differ helper used by CaptureFrame(), if needed. | 262 // Refresh the Differ helper used by CaptureFrame(), if needed. |
265 DesktopFrame* frame = queue_.current_frame(); | 263 DesktopFrame* frame = queue_.current_frame(); |
266 if (!use_damage_ && ( | 264 if (!use_damage_ && ( |
267 !differ_.get() || | 265 !differ_.get() || |
268 (differ_->width() != frame->size().width()) || | 266 (differ_->width() != frame->size().width()) || |
269 (differ_->height() != frame->size().height()) || | 267 (differ_->height() != frame->size().height()) || |
270 (differ_->bytes_per_row() != frame->stride()))) { | 268 (differ_->bytes_per_row() != frame->stride()))) { |
271 differ_.reset(new Differ(frame->size().width(), frame->size().height(), | 269 differ_.reset(new Differ(frame->size().width(), frame->size().height(), |
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438 if (!options.x_display()) | 436 if (!options.x_display()) |
439 return NULL; | 437 return NULL; |
440 | 438 |
441 std::unique_ptr<ScreenCapturerLinux> capturer(new ScreenCapturerLinux()); | 439 std::unique_ptr<ScreenCapturerLinux> capturer(new ScreenCapturerLinux()); |
442 if (!capturer->Init(options)) | 440 if (!capturer->Init(options)) |
443 capturer.reset(); | 441 capturer.reset(); |
444 return capturer.release(); | 442 return capturer.release(); |
445 } | 443 } |
446 | 444 |
447 } // namespace webrtc | 445 } // namespace webrtc |
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