1 /*
2 * Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
3 *
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
6 * tree. An additional intellectual property rights grant can be found
7 * in the file PATENTS. All contributing project authors may
8 * be found in the AUTHORS file in the root of the source tree.
9 */
10
11 #include "modules/desktop_capture/mac/desktop_configuration_monitor.h"
12
13 #include "modules/desktop_capture/mac/desktop_configuration.h"
14 #include "rtc_base/logging.h"
15 #include "rtc_base/trace_event.h"
16
17 namespace webrtc {
18
DesktopConfigurationMonitor()19 DesktopConfigurationMonitor::DesktopConfigurationMonitor() {
20 CGError err = CGDisplayRegisterReconfigurationCallback(
21 DesktopConfigurationMonitor::DisplaysReconfiguredCallback, this);
22 if (err != kCGErrorSuccess)
23 RTC_LOG(LS_ERROR) << "CGDisplayRegisterReconfigurationCallback " << err;
24 MutexLock lock(&desktop_configuration_lock_);
25 desktop_configuration_ = MacDesktopConfiguration::GetCurrent(
26 MacDesktopConfiguration::TopLeftOrigin);
27 }
28
~DesktopConfigurationMonitor()29 DesktopConfigurationMonitor::~DesktopConfigurationMonitor() {
30 CGError err = CGDisplayRemoveReconfigurationCallback(
31 DesktopConfigurationMonitor::DisplaysReconfiguredCallback, this);
32 if (err != kCGErrorSuccess)
33 RTC_LOG(LS_ERROR) << "CGDisplayRemoveReconfigurationCallback " << err;
34 }
35
desktop_configuration()36 MacDesktopConfiguration DesktopConfigurationMonitor::desktop_configuration() {
37 MutexLock lock(&desktop_configuration_lock_);
38 return desktop_configuration_;
39 }
40
41 // static
42 // This method may be called on any system thread.
DisplaysReconfiguredCallback(CGDirectDisplayID display,CGDisplayChangeSummaryFlags flags,void * user_parameter)43 void DesktopConfigurationMonitor::DisplaysReconfiguredCallback(
44 CGDirectDisplayID display,
45 CGDisplayChangeSummaryFlags flags,
46 void* user_parameter) {
47 DesktopConfigurationMonitor* monitor =
48 reinterpret_cast<DesktopConfigurationMonitor*>(user_parameter);
49 monitor->DisplaysReconfigured(display, flags);
50 }
51
DisplaysReconfigured(CGDirectDisplayID display,CGDisplayChangeSummaryFlags flags)52 void DesktopConfigurationMonitor::DisplaysReconfigured(
53 CGDirectDisplayID display,
54 CGDisplayChangeSummaryFlags flags) {
55 TRACE_EVENT0("webrtc", "DesktopConfigurationMonitor::DisplaysReconfigured");
56 RTC_LOG(LS_INFO) << "DisplaysReconfigured: "
57 "DisplayID "
58 << display << "; ChangeSummaryFlags " << flags;
59
60 if (flags & kCGDisplayBeginConfigurationFlag) {
61 reconfiguring_displays_.insert(display);
62 return;
63 }
64
65 reconfiguring_displays_.erase(display);
66 if (reconfiguring_displays_.empty()) {
67 MutexLock lock(&desktop_configuration_lock_);
68 desktop_configuration_ = MacDesktopConfiguration::GetCurrent(
69 MacDesktopConfiguration::TopLeftOrigin);
70 }
71 }
72
73 } // namespace webrtc
74