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