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/*
* Copyright (C) 2013 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#import "config.h"
#import "AudioSession.h"
#if USE(AUDIO_SESSION) && PLATFORM(IOS)
#import "SoftLinking.h"
#import <AVFoundation/AVAudioSession.h>
#import <objc/runtime.h>
#import <wtf/RetainPtr.h>
SOFT_LINK_FRAMEWORK(AVFoundation)
SOFT_LINK_CLASS(AVFoundation, AVAudioSession)
SOFT_LINK_POINTER(AVFoundation, AVAudioSessionCategoryAmbient, NSString *)
SOFT_LINK_POINTER(AVFoundation, AVAudioSessionCategorySoloAmbient, NSString *)
SOFT_LINK_POINTER(AVFoundation, AVAudioSessionCategoryPlayback, NSString *)
SOFT_LINK_POINTER(AVFoundation, AVAudioSessionCategoryRecord, NSString *)
SOFT_LINK_POINTER(AVFoundation, AVAudioSessionCategoryPlayAndRecord, NSString *)
SOFT_LINK_POINTER(AVFoundation, AVAudioSessionCategoryAudioProcessing, NSString *)
SOFT_LINK_POINTER(AVFoundation, AVAudioSessionInterruptionNotification, NSString *)
SOFT_LINK_POINTER(AVFoundation, AVAudioSessionInterruptionTypeKey, NSString *)
#define AVAudioSession getAVAudioSessionClass()
#define AVAudioSessionCategoryAmbient getAVAudioSessionCategoryAmbient()
#define AVAudioSessionCategorySoloAmbient getAVAudioSessionCategorySoloAmbient()
#define AVAudioSessionCategoryPlayback getAVAudioSessionCategoryPlayback()
#define AVAudioSessionCategoryRecord getAVAudioSessionCategoryRecord()
#define AVAudioSessionCategoryPlayAndRecord getAVAudioSessionCategoryPlayAndRecord()
#define AVAudioSessionCategoryAudioProcessing getAVAudioSessionCategoryAudioProcessing()
#define AVAudioSessionInterruptionNotification getAVAudioSessionInterruptionNotification()
#define AVAudioSessionInterruptionTypeKey getAVAudioSessionInterruptionTypeKey()
@interface WebAudioSessionHelper : NSObject {
WebCore::AudioSession* _callback;
}
- (id)initWithCallback:(WebCore::AudioSession*)callback;
- (void)interruption:(NSNotification*)notification;
@end
@implementation WebAudioSessionHelper
- (id)initWithCallback:(WebCore::AudioSession*)callback
{
self = [super init];
if (!self)
return nil;
_callback = callback;
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(interruption:) name:AVAudioSessionInterruptionNotification object:[AVAudioSession sharedInstance]];
return self;
}
- (void)dealloc
{
[[NSNotificationCenter defaultCenter] removeObserver:self];
[super dealloc];
}
- (void)interruption:(NSNotification *)notification
{
NSUInteger type = [[[notification userInfo] objectForKey:AVAudioSessionInterruptionTypeKey] unsignedIntegerValue];
if (type == AVAudioSessionInterruptionTypeBegan)
_callback->beganAudioInterruption();
else
_callback->endedAudioInterruption();
}
@end
namespace WebCore {
class AudioSessionPrivate {
public:
AudioSessionPrivate(AudioSession*);
RetainPtr<WebAudioSessionHelper> m_helper;
AudioSession::CategoryType m_categoryOverride;
};
AudioSessionPrivate::AudioSessionPrivate(AudioSession* session)
: m_helper(adoptNS([[WebAudioSessionHelper alloc] initWithCallback:session]))
, m_categoryOverride(AudioSession::None)
{
}
AudioSession::AudioSession()
: m_private(adoptPtr(new AudioSessionPrivate(this)))
{
}
AudioSession::~AudioSession()
{
}
void AudioSession::setCategory(CategoryType newCategory)
{
if (categoryOverride() && categoryOverride() != newCategory)
return;
if (!categoryOverride()) {
// If a page plays only WebAudio we set the audio category to "ambient" so it is muted by the ringer switch.
// However, audio from an HTML5 media element or from a plug-in should always play as "media" so don't change the
// category once it has already been set to media.
if (newCategory == AudioSession::AmbientSound && category() == AudioSession::MediaPlayback)
return;
}
NSString* categoryString;
switch (newCategory) {
case AmbientSound:
categoryString = AVAudioSessionCategoryAmbient;
case SoloAmbientSound:
categoryString = AVAudioSessionCategorySoloAmbient;
case MediaPlayback:
categoryString = AVAudioSessionCategoryPlayback;
case RecordAudio:
categoryString = AVAudioSessionCategoryRecord;
case PlayAndRecord:
categoryString = AVAudioSessionCategoryPlayAndRecord;
case AudioProcessing:
categoryString = AVAudioSessionCategoryAudioProcessing;
case None:
default:
categoryString = nil;
}
NSError *error = nil;
[[AVAudioSession sharedInstance] setCategory:categoryString error:&error];
ASSERT(!error);
}
AudioSession::CategoryType AudioSession::category() const
{
NSString* categoryString = [[AVAudioSession sharedInstance] category];
if ([categoryString isEqual:AVAudioSessionCategoryAmbient])
return AmbientSound;
if ([categoryString isEqual:AVAudioSessionCategorySoloAmbient])
return SoloAmbientSound;
if ([categoryString isEqual:AVAudioSessionCategoryPlayback])
return MediaPlayback;
if ([categoryString isEqual:AVAudioSessionCategoryRecord])
return RecordAudio;
if ([categoryString isEqual:AVAudioSessionCategoryPlayAndRecord])
return PlayAndRecord;
if ([categoryString isEqual:AVAudioSessionCategoryAudioProcessing])
return AudioProcessing;
return None;
}
void AudioSession::setCategoryOverride(CategoryType category)
{
if (m_private->m_categoryOverride == category)
return;
m_private->m_categoryOverride = category;
setCategory(category);
}
AudioSession::CategoryType AudioSession::categoryOverride() const
{
return m_private->m_categoryOverride;
}
float AudioSession::sampleRate() const
{
return [[AVAudioSession sharedInstance] sampleRate];
}
size_t AudioSession::numberOfOutputChannels() const
{
return [[AVAudioSession sharedInstance] outputNumberOfChannels];
}
void AudioSession::setActive(bool active)
{
NSError *error = nil;
[[AVAudioSession sharedInstance] setActive:active error:&error];
ASSERT(!error);
}
size_t AudioSession::preferredBufferSize() const
{
return [[AVAudioSession sharedInstance] preferredIOBufferDuration] * sampleRate();
}
void AudioSession::setPreferredBufferSize(size_t bufferSize)
{
NSError *error = nil;
float duration = bufferSize / sampleRate();
[[AVAudioSession sharedInstance] setPreferredIOBufferDuration:duration error:&error];
ASSERT(!error);
}
}
#endif // USE(AUDIO_SESSION) && PLATFORM(IOS)
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