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