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/*
* Copyright (c) 2014 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 "modules/desktop_capture/mac/desktop_configuration_monitor.h"
#include "modules/desktop_capture/mac/desktop_configuration.h"
#include "rtc_base/logging.h"
#include "rtc_base/trace_event.h"
namespace webrtc {
DesktopConfigurationMonitor::DesktopConfigurationMonitor() {
CGError err = CGDisplayRegisterReconfigurationCallback(
DesktopConfigurationMonitor::DisplaysReconfiguredCallback, this);
if (err != kCGErrorSuccess)
RTC_LOG(LS_ERROR) << "CGDisplayRegisterReconfigurationCallback " << err;
MutexLock lock(&desktop_configuration_lock_);
desktop_configuration_ = MacDesktopConfiguration::GetCurrent(
MacDesktopConfiguration::TopLeftOrigin);
}
DesktopConfigurationMonitor::~DesktopConfigurationMonitor() {
CGError err = CGDisplayRemoveReconfigurationCallback(
DesktopConfigurationMonitor::DisplaysReconfiguredCallback, this);
if (err != kCGErrorSuccess)
RTC_LOG(LS_ERROR) << "CGDisplayRemoveReconfigurationCallback " << err;
}
MacDesktopConfiguration DesktopConfigurationMonitor::desktop_configuration() {
MutexLock lock(&desktop_configuration_lock_);
return desktop_configuration_;
}
// static
// This method may be called on any system thread.
void DesktopConfigurationMonitor::DisplaysReconfiguredCallback(
CGDirectDisplayID display,
CGDisplayChangeSummaryFlags flags,
void* user_parameter) {
DesktopConfigurationMonitor* monitor =
reinterpret_cast<DesktopConfigurationMonitor*>(user_parameter);
monitor->DisplaysReconfigured(display, flags);
}
void DesktopConfigurationMonitor::DisplaysReconfigured(
CGDirectDisplayID display,
CGDisplayChangeSummaryFlags flags) {
TRACE_EVENT0("webrtc", "DesktopConfigurationMonitor::DisplaysReconfigured");
RTC_LOG(LS_INFO) << "DisplaysReconfigured: "
"DisplayID "
<< display << "; ChangeSummaryFlags " << flags;
if (flags & kCGDisplayBeginConfigurationFlag) {
reconfiguring_displays_.insert(display);
return;
}
reconfiguring_displays_.erase(display);
if (reconfiguring_displays_.empty()) {
MutexLock lock(&desktop_configuration_lock_);
desktop_configuration_ = MacDesktopConfiguration::GetCurrent(
MacDesktopConfiguration::TopLeftOrigin);
}
}
} // namespace webrtc