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#include "config.h" 27#include "MediaSessionManager.h" 28 29#if USE(AUDIO_SESSION) 30 31#include "AudioSession.h" 32#include "Logging.h" 33#include "Settings.h" 34 35using namespace WebCore; 36 37static const size_t kWebAudioBufferSize = 128; 38 39#if PLATFORM(IOS) || __MAC_OS_X_VERSION_MIN_REQUIRED >= 1090 40static const size_t kLowPowerVideoBufferSize = 4096; 41#endif 42 43void MediaSessionManager::updateSessionState() 44{ 45 LOG(Media, "MediaSessionManager::updateSessionState() - types: Video(%d), Audio(%d), WebAudio(%d)", count(MediaSession::Video), count(MediaSession::Audio), count(MediaSession::WebAudio)); 46 47 if (has(MediaSession::WebAudio)) 48 AudioSession::sharedSession().setPreferredBufferSize(kWebAudioBufferSize); 49#if PLATFORM(IOS) || __MAC_OS_X_VERSION_MIN_REQUIRED >= 1090 50 else if ((has(MediaSession::Video) || has(MediaSession::Audio)) && Settings::lowPowerVideoAudioBufferSizeEnabled()) { 51 // FIXME: <http://webkit.org/b/116725> Figure out why enabling the code below 52 // causes media LayoutTests to fail on 10.8. 53 54 size_t bufferSize; 55 if (m_audioHardwareListener && m_audioHardwareListener->outputDeviceSupportsLowPowerMode()) 56 bufferSize = kLowPowerVideoBufferSize; 57 else 58 bufferSize = kWebAudioBufferSize; 59 60 AudioSession::sharedSession().setPreferredBufferSize(bufferSize); 61 } 62#endif 63 64#if PLATFORM(IOS) 65 if (activeAudioSessionRequired()) 66 AudioSession::sharedSession().setActive(true); 67 68 if (!Settings::shouldManageAudioSessionCategory()) 69 return; 70 71 if (has(MediaSession::Video) || has(MediaSession::Audio)) 72 AudioSession::sharedSession().setCategory(AudioSession::MediaPlayback); 73 else if (has(MediaSession::WebAudio)) 74 AudioSession::sharedSession().setCategory(AudioSession::AmbientSound); 75#endif 76} 77 78#endif // USE(AUDIO_SESSION) 79