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