1 | /* |
2 | * Copyright (C) 2014 Apple Inc. All rights reserved. |
3 | * |
4 | * Redistribution and use in source and binary forms, with or without |
5 | * modification, are permitted provided that the following conditions |
6 | * are met: |
7 | * 1. Redistributions of source code must retain the above copyright |
8 | * notice, this list of conditions and the following disclaimer. |
9 | * 2. Redistributions in binary form must reproduce the above copyright |
10 | * notice, this list of conditions and the following disclaimer in the |
11 | * documentation and/or other materials provided with the distribution. |
12 | * |
13 | * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' |
14 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
15 | * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
16 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS |
17 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
18 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
19 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
20 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
21 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
22 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF |
23 | * THE POSSIBILITY OF SUCH DAMAGE. |
24 | */ |
25 | |
26 | #ifndef AudioHardwareListener_h |
27 | #define AudioHardwareListener_h |
28 | |
29 | #include <wtf/Ref.h> |
30 | #include <wtf/RefCounted.h> |
31 | |
32 | namespace WebCore { |
33 | |
34 | enum class AudioHardwareActivityType { |
35 | Unknown, |
36 | IsActive, |
37 | IsInactive |
38 | }; |
39 | |
40 | class AudioHardwareListener : public RefCounted<AudioHardwareListener> { |
41 | public: |
42 | class Client { |
43 | public: |
44 | virtual ~Client() = default; |
45 | virtual void audioHardwareDidBecomeActive() = 0; |
46 | virtual void audioHardwareDidBecomeInactive() = 0; |
47 | virtual void audioOutputDeviceChanged() = 0; |
48 | }; |
49 | |
50 | WEBCORE_EXPORT static Ref<AudioHardwareListener> create(Client&); |
51 | virtual ~AudioHardwareListener() = default; |
52 | |
53 | AudioHardwareActivityType hardwareActivity() const { return m_activity; } |
54 | bool outputDeviceSupportsLowPowerMode() const { return m_outputDeviceSupportsLowPowerMode; } |
55 | |
56 | protected: |
57 | AudioHardwareListener(Client&); |
58 | |
59 | void setHardwareActivity(AudioHardwareActivityType activity) { m_activity = activity; } |
60 | void setOutputDeviceSupportsLowPowerMode(bool support) { m_outputDeviceSupportsLowPowerMode = support; } |
61 | |
62 | Client& m_client; |
63 | AudioHardwareActivityType m_activity; |
64 | bool m_outputDeviceSupportsLowPowerMode; |
65 | }; |
66 | |
67 | } |
68 | |
69 | #endif // AudioHardwareListener_h |
70 | |