1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
|
/*
* Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include <ApplicationServices/ApplicationServices.h>
#include <Cocoa/Cocoa.h>
#include <CoreFoundation/CoreFoundation.h>
#include <utility>
#include "api/scoped_refptr.h"
#include "modules/desktop_capture/desktop_capture_options.h"
#include "modules/desktop_capture/desktop_capturer.h"
#include "modules/desktop_capture/desktop_frame.h"
#include "modules/desktop_capture/mac/desktop_configuration.h"
#include "modules/desktop_capture/mac/desktop_configuration_monitor.h"
#include "modules/desktop_capture/mac/desktop_frame_cgimage.h"
#include "modules/desktop_capture/mac/window_list_utils.h"
#include "modules/desktop_capture/window_finder_mac.h"
#include "rtc_base/checks.h"
#include "rtc_base/logging.h"
#include "rtc_base/trace_event.h"
namespace webrtc {
namespace {
// Returns true if the window exists.
bool IsWindowValid(CGWindowID id) {
CFArrayRef window_id_array =
CFArrayCreate(nullptr, reinterpret_cast<const void**>(&id), 1, nullptr);
CFArrayRef window_array =
CGWindowListCreateDescriptionFromArray(window_id_array);
bool valid = window_array && CFArrayGetCount(window_array);
CFRelease(window_id_array);
CFRelease(window_array);
return valid;
}
class WindowCapturerMac : public DesktopCapturer {
public:
explicit WindowCapturerMac(
rtc::scoped_refptr<FullScreenWindowDetector> full_screen_window_detector,
rtc::scoped_refptr<DesktopConfigurationMonitor> configuration_monitor);
~WindowCapturerMac() override;
WindowCapturerMac(const WindowCapturerMac&) = delete;
WindowCapturerMac& operator=(const WindowCapturerMac&) = delete;
// DesktopCapturer interface.
void Start(Callback* callback) override;
void CaptureFrame() override;
bool GetSourceList(SourceList* sources) override;
bool SelectSource(SourceId id) override;
bool FocusOnSelectedSource() override;
bool IsOccluded(const DesktopVector& pos) override;
private:
Callback* callback_ = nullptr;
// The window being captured.
CGWindowID window_id_ = 0;
rtc::scoped_refptr<FullScreenWindowDetector> full_screen_window_detector_;
const rtc::scoped_refptr<DesktopConfigurationMonitor> configuration_monitor_;
WindowFinderMac window_finder_;
// Used to make sure that we only log the usage of fullscreen detection once.
bool fullscreen_usage_logged_ = false;
};
WindowCapturerMac::WindowCapturerMac(
rtc::scoped_refptr<FullScreenWindowDetector> full_screen_window_detector,
rtc::scoped_refptr<DesktopConfigurationMonitor> configuration_monitor)
: full_screen_window_detector_(std::move(full_screen_window_detector)),
configuration_monitor_(std::move(configuration_monitor)),
window_finder_(configuration_monitor_) {}
WindowCapturerMac::~WindowCapturerMac() {}
bool WindowCapturerMac::GetSourceList(SourceList* sources) {
return webrtc::GetWindowList(sources, true, true);
}
bool WindowCapturerMac::SelectSource(SourceId id) {
if (!IsWindowValid(id))
return false;
window_id_ = id;
return true;
}
bool WindowCapturerMac::FocusOnSelectedSource() {
if (!window_id_)
return false;
CGWindowID ids[1];
ids[0] = window_id_;
CFArrayRef window_id_array =
CFArrayCreate(nullptr, reinterpret_cast<const void**>(&ids), 1, nullptr);
CFArrayRef window_array =
CGWindowListCreateDescriptionFromArray(window_id_array);
if (!window_array || 0 == CFArrayGetCount(window_array)) {
// Could not find the window. It might have been closed.
RTC_LOG(LS_INFO) << "Window not found";
CFRelease(window_id_array);
return false;
}
CFDictionaryRef window = reinterpret_cast<CFDictionaryRef>(
CFArrayGetValueAtIndex(window_array, 0));
CFNumberRef pid_ref = reinterpret_cast<CFNumberRef>(
CFDictionaryGetValue(window, kCGWindowOwnerPID));
int pid;
CFNumberGetValue(pid_ref, kCFNumberIntType, &pid);
// TODO(jiayl): this will bring the process main window to the front. We
// should find a way to bring only the window to the front.
bool result =
[[NSRunningApplication runningApplicationWithProcessIdentifier:pid] activateWithOptions:0];
CFRelease(window_id_array);
CFRelease(window_array);
return result;
}
bool WindowCapturerMac::IsOccluded(const DesktopVector& pos) {
DesktopVector sys_pos = pos;
if (configuration_monitor_) {
auto configuration = configuration_monitor_->desktop_configuration();
sys_pos = pos.add(configuration.bounds.top_left());
}
return window_finder_.GetWindowUnderPoint(sys_pos) != window_id_;
}
void WindowCapturerMac::Start(Callback* callback) {
RTC_DCHECK(!callback_);
RTC_DCHECK(callback);
callback_ = callback;
}
void WindowCapturerMac::CaptureFrame() {
TRACE_EVENT0("webrtc", "WindowCapturerMac::CaptureFrame");
if (!IsWindowValid(window_id_)) {
RTC_LOG(LS_ERROR) << "The window is not valid any longer.";
callback_->OnCaptureResult(Result::ERROR_PERMANENT, nullptr);
return;
}
CGWindowID on_screen_window = window_id_;
if (full_screen_window_detector_) {
full_screen_window_detector_->UpdateWindowListIfNeeded(
window_id_, [](DesktopCapturer::SourceList* sources) {
// Not using webrtc::GetWindowList(sources, true, false)
// as it doesn't allow to have in the result window with
// empty title along with titled window owned by the same pid.
return webrtc::GetWindowList(
[sources](CFDictionaryRef window) {
WindowId window_id = GetWindowId(window);
int pid = GetWindowOwnerPid(window);
if (window_id != kNullWindowId) {
sources->push_back(DesktopCapturer::Source{window_id, pid, GetWindowTitle(window)});
}
return true;
},
true,
false);
});
CGWindowID full_screen_window = full_screen_window_detector_->FindFullScreenWindow(window_id_);
if (full_screen_window != kCGNullWindowID) {
// If this is the first time this happens, report to UMA that the feature is active.
if (!fullscreen_usage_logged_) {
LogDesktopCapturerFullscreenDetectorUsage();
fullscreen_usage_logged_ = true;
}
on_screen_window = full_screen_window;
}
}
std::unique_ptr<DesktopFrame> frame = DesktopFrameCGImage::CreateForWindow(on_screen_window);
if (!frame) {
RTC_LOG(LS_WARNING) << "Temporarily failed to capture window.";
callback_->OnCaptureResult(Result::ERROR_TEMPORARY, nullptr);
return;
}
frame->mutable_updated_region()->SetRect(
DesktopRect::MakeSize(frame->size()));
frame->set_top_left(GetWindowBounds(on_screen_window).top_left());
float scale_factor = GetWindowScaleFactor(window_id_, frame->size());
frame->set_dpi(DesktopVector(kStandardDPI * scale_factor, kStandardDPI * scale_factor));
callback_->OnCaptureResult(Result::SUCCESS, std::move(frame));
}
} // namespace
// static
std::unique_ptr<DesktopCapturer> DesktopCapturer::CreateRawWindowCapturer(
const DesktopCaptureOptions& options) {
return std::unique_ptr<DesktopCapturer>(new WindowCapturerMac(
options.full_screen_window_detector(), options.configuration_monitor()));
}
} // namespace webrtc
|