1/*
2 * Copyright (C) 2013 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 AudioSessionManager_h
27#define AudioSessionManager_h
28
29#if USE(AUDIO_SESSION)
30
31#include "AudioSession.h"
32#include <wtf/HashCountedSet.h>
33#include <wtf/PassOwnPtr.h>
34
35namespace WebCore {
36
37class AudioSessionManager {
38public:
39    static AudioSessionManager& sharedManager();
40
41    enum AudioType {
42        None,
43        Video,
44        Audio,
45        WebAudio,
46    };
47
48    bool has(AudioType);
49
50protected:
51    friend class AudioSessionManagerToken;
52    void incrementCount(AudioType);
53    void decrementCount(AudioType);
54
55private:
56    AudioSessionManager();
57
58    void updateSessionState();
59
60    HashCountedSet<size_t> m_typeCount;
61};
62
63class AudioSessionManagerToken {
64public:
65    static PassOwnPtr<AudioSessionManagerToken> create(AudioSessionManager::AudioType);
66    ~AudioSessionManagerToken();
67
68private:
69    AudioSessionManagerToken(AudioSessionManager::AudioType);
70
71    AudioSessionManager::AudioType m_type;
72};
73}
74
75#endif // USE(AUDIO_SESSION)
76
77#endif // AudioSessionManager_h
78