Music Hub  ..
A session-wide music playback service
call_monitor.h
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1 /*
2  * Copyright (C) 2014 Canonical Ltd
3  *
4  * This program is free software: you can redistribute it and/or modify
5  * it under the terms of the GNU Lesser General Public License version 3 as
6  * published by the Free Software Foundation.
7  *
8  * This program is distributed in the hope that it will be useful,
9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11  * GNU Lesser General Public License for more details.
12  *
13  * You should have received a copy of the GNU Lesser General Public License
14  * along with this program. If not, see <http://www.gnu.org/licenses/>.
15  *
16  * Author: Justin McPherson <justin.mcpherson@canonical.com>
17  */
18 
19 
20 #ifndef CORE_UBUNTU_MEDIA_TELEPHONY_CALL_MONITOR_H_
21 #define CORE_UBUNTU_MEDIA_TELEPHONY_CALL_MONITOR_H_
22 
23 #include <core/signal.h>
24 
25 #include <functional>
26 #include <memory>
27 
28 namespace core
29 {
30 namespace ubuntu
31 {
32 namespace media
33 {
34 namespace telephony
35 {
36 // CallMonitor models the ability to observe and react
37 // to changes of the overall call state of the system.
39 {
40  // Save us some typing.
41  typedef std::shared_ptr<CallMonitor> Ptr;
42 
43  // All known call states
44  enum class State
45  {
46  // No current call.
47  OffHook,
48  // Call in progress.
49  OnHook
50  };
51 
52  CallMonitor() = default;
53  virtual ~CallMonitor() = default;
54 
55  // Emitted whenever the current call state of the system changes.
56  virtual const core::Signal<State>& on_call_state_changed() const = 0;
57 };
58 
59 // Returns a platform default implementation of CallMonitor.
61 }
62 }
63 }
64 }
65 
66 #endif // CORE_UBUNTU_MEDIA_TELEPHONY_CALL_MONITOR_H_
Definition: player.h:33
virtual const core::Signal< State > & on_call_state_changed() const =0
CallMonitor::Ptr make_platform_default_call_monitor()
std::shared_ptr< CallMonitor > Ptr
Definition: call_monitor.h:41