mirror of
https://github.com/make-42/hayai.git
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91 lines
2.8 KiB
Objective-C
91 lines
2.8 KiB
Objective-C
// Copyright 2019 The Oto Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// +build darwin,ios
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#import <AVFoundation/AVFoundation.h>
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#import <AudioToolbox/AudioToolbox.h>
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#import <UIKit/UIKit.h>
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#include "_cgo_export.h"
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@interface OtoNotificationObserver : NSObject {
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}
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- (void)onAudioSessionInterruption:(NSNotification *)notification;
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@end
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@implementation OtoNotificationObserver {
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}
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- (void)onAudioSessionInterruption:(NSNotification *)notification {
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if (![notification.name isEqualToString:AVAudioSessionInterruptionNotification]) {
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return;
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}
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NSObject* value = [notification.userInfo valueForKey:AVAudioSessionInterruptionTypeKey];
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AVAudioSessionInterruptionType interruptionType = [(NSNumber*)value intValue];
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switch (interruptionType) {
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case AVAudioSessionInterruptionTypeBegan: {
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oto_setGlobalPause();
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break;
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}
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case AVAudioSessionInterruptionTypeEnded: {
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// AVAudioSessionInterruptionTypeBegan and Ended might not be paired when
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// Siri is used. Then, incrementing and decrementing a counter with this
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// notification doesn't work.
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oto_setGlobalResume();
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break;
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}
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default:
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NSAssert(NO, @"unexpected AVAudioSessionInterruptionType: %lu",
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(unsigned long)(interruptionType));
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break;
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}
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}
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@end
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// oto_setNotificationHandler sets a handler for interruption events.
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// Without the handler, Siri would stop the audio (#80).
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void oto_setNotificationHandler() {
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AVAudioSession* session = [AVAudioSession sharedInstance];
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OtoNotificationObserver *observer = [[OtoNotificationObserver alloc] init];
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[[NSNotificationCenter defaultCenter]
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addObserver:observer
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selector:@selector(onAudioSessionInterruption:)
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name:AVAudioSessionInterruptionNotification
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object:session];
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// The notifications UIApplicationDidEnterBackgroundNotification and
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// UIApplicationWillEnterForegroundNotification were not reliable: at least,
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// they were not notified at iPod touch A2178.
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//
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// Instead, check the background state via UIApplication actively.
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}
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bool oto_isBackground(void) {
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if ([NSThread isMainThread]) {
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return [[UIApplication sharedApplication] applicationState] ==
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UIApplicationStateBackground;
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}
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__block bool background = false;
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dispatch_sync(dispatch_get_main_queue(), ^{
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background = oto_isBackground();
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});
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return background;
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}
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