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 #ifndef WEBRTC_MODULES_DESKTOP_CAPTURE_MAC_DESKTOP_CONFIGURATION_MONITOR_H_ 12 #define WEBRTC_MODULES_DESKTOP_CAPTURE_MAC_DESKTOP_CONFIGURATION_MONITOR_H_ 13 14 #include <ApplicationServices/ApplicationServices.h> 15 16 #include <set> 17 18 #include "webrtc/modules/desktop_capture/mac/desktop_configuration.h" 19 #include "webrtc/system_wrappers/interface/atomic32.h" 20 #include "webrtc/system_wrappers/interface/scoped_ptr.h" 21 22 namespace webrtc { 23 24 class EventWrapper; 25 26 // The class provides functions to synchronize capturing and display 27 // reconfiguring across threads, and the up-to-date MacDesktopConfiguration. 28 class DesktopConfigurationMonitor { 29 public: 30 DesktopConfigurationMonitor(); 31 // Acquires a lock on the current configuration. 32 void Lock(); 33 // Releases the lock previously acquired. 34 void Unlock(); 35 // Returns the current desktop configuration. Should only be called when the 36 // lock has been acquired. desktop_configuration()37 const MacDesktopConfiguration& desktop_configuration() { 38 return desktop_configuration_; 39 } 40 AddRef()41 void AddRef() { ++ref_count_; } Release()42 void Release() { 43 if (--ref_count_ == 0) 44 delete this; 45 } 46 47 private: 48 static void DisplaysReconfiguredCallback(CGDirectDisplayID display, 49 CGDisplayChangeSummaryFlags flags, 50 void *user_parameter); 51 ~DesktopConfigurationMonitor(); 52 53 void DisplaysReconfigured(CGDirectDisplayID display, 54 CGDisplayChangeSummaryFlags flags); 55 56 Atomic32 ref_count_; 57 std::set<CGDirectDisplayID> reconfiguring_displays_; 58 MacDesktopConfiguration desktop_configuration_; 59 scoped_ptr<EventWrapper> display_configuration_capture_event_; 60 61 DISALLOW_COPY_AND_ASSIGN(DesktopConfigurationMonitor); 62 }; 63 64 } // namespace webrtc 65 66 #endif // WEBRTC_MODULES_DESKTOP_CAPTURE_MAC_DESKTOP_CONFIGURATION_MONITOR_H_ 67