1/*
2 * Copyright (C) 2013-2014 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 AudioSession_h
27#define AudioSession_h
28
29#if USE(AUDIO_SESSION)
30
31#include <memory>
32#include <wtf/HashSet.h>
33#include <wtf/Noncopyable.h>
34
35namespace WebCore {
36
37class AudioSessionPrivate;
38
39class AudioSession {
40    WTF_MAKE_NONCOPYABLE(AudioSession);
41public:
42    static AudioSession& sharedSession();
43
44    enum CategoryType {
45        None,
46        AmbientSound,
47        SoloAmbientSound,
48        MediaPlayback,
49        RecordAudio,
50        PlayAndRecord,
51        AudioProcessing,
52    };
53    void setCategory(CategoryType);
54    CategoryType category() const;
55
56    void setCategoryOverride(CategoryType);
57    CategoryType categoryOverride() const;
58
59    float sampleRate() const;
60    size_t numberOfOutputChannels() const;
61
62    void setActive(bool);
63
64    size_t preferredBufferSize() const;
65    void setPreferredBufferSize(size_t);
66
67private:
68    AudioSession();
69    ~AudioSession();
70
71    std::unique_ptr<AudioSessionPrivate> m_private;
72};
73
74}
75
76#endif // USE(AUDIO_SESSION)
77
78#endif // AudioSession_h
79