2

几个小时前,我一直在尝试解决 AVAudioSession 问题,但没有成功!!

我发现很多人都在谈论 endInterruption 的问题,但没有人谈论这个错误:

Unable to reactivate the audio session after the interruption ended: Error Domain=NSOSStatusErrorDomain Code=560161140 "The operation couldn’t be completed. (OSStatus error 560161140.)"

我尝试将此代码转换为 ASCII 以检查音频代码结果,但与此数字无关。

我启动会话的代码:

- (void) setupAudioSession {

mySession = [AVAudioSession sharedInstance];
[mySession setDelegate: self];

NSError *audioSessionError = nil;
[mySession setCategory: AVAudioSessionCategoryPlayback error: &audioSessionError];

if (audioSessionError != nil) {
    NSLog (@"Error setting audio session category: %@", [audioSessionError description]);
    return;
}

// Activate the audio session
[mySession setActive: YES error: &audioSessionError];

if (audioSessionError != nil) {
    NSLog (@"Error activating audio session during initial setup: %@", [audioSessionError description]);
    return;
}

// Prepare audio file to play
NSBundle *mainBundle = [NSBundle mainBundle];
NSURL *bgSoundURL = [NSURL fileURLWithPath:[mainBundle pathForResource:@"bg_sound" ofType:@"aif"]];

bgPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:bgSoundURL error:&audioSessionError];
if (!bgPlayer) {
    NSLog(@"No bgPlayer: %@", [audioSessionError description]);  
}

[bgPlayer setNumberOfLoops:-1];
[bgPlayer prepareToPlay];

}

以及 endInterruption 方法的代码:

- (void) endInterruptionWithFlags: (NSUInteger) flags {

if (flags & AVAudioSessionInterruptionFlags_ShouldResume) {

    NSError *endInterruptionError = nil;
    [[AVAudioSession sharedInstance] setActive: YES error: &endInterruptionError];
    if (endInterruptionError != nil) {

        NSLog (@"Unable to reactivate the audio session after the interruption ended: %@", [endInterruptionError description]);
        return;

    } else {

        NSLog (@"Audio session reactivated after interruption.");

        if (interruptedWhilePlaying) {

            self.interruptedWhilePlaying = NO;

            // Resume playback by sending a notification to the controller object, which
            //    in turn invokes the playOrStop: toggle method.
            NSString *MixerHostAudioObjectPlaybackStateDidChangeNotification = @"MixerHostAudioObjectPlaybackStateDidChangeNotification";
            [[NSNotificationCenter defaultCenter] postNotificationName: MixerHostAudioObjectPlaybackStateDidChangeNotification object: self]; 

        }
    }
}

}

这段代码的很大一部分是从 Apple Mixer Host Sample 中提取的。奇怪的是样本工作正常!

你们能弄清楚是什么问题吗?

谢谢。

4

4 回答 4

2

我解决了改变设计音频代码的方式的问题。我没有使用 AVAudioSession 及其委托方法,而是改用 C 风格来处理音频。

我实现了这个功能:

void interruptionListenerCallback (void *inUserData, UInt32 interruptionState) {}

它被初始化为:

AudioSessionInitialize (NULL, NULL, interruptionListenerCallback, self);

在我的 -(id) init 方法中。

希望它也能帮助你。最好的。

于 2011-02-24T15:44:13.323 回答
2

“如果此委托方法在其标志参数中接收到 AVAudioSessionInterruptionFlags_ShouldResume 常量,则音频会话立即可以使用。”

您没有正确处理回调。当您收到 AVAudioSessionInterruptionFlags_ShouldResume 时,您的音频会话已准备好使用。当您获得 DIFFERENT 标志时,您需要调用 setActive。

希望能帮助到你...

于 2011-08-09T16:03:49.647 回答
1

使用@Trinca 回答我在“ARC'ed”项目中所做的事情:

AudioSessionInitialize (NULL, NULL, interruptionListenerCallback, (__bridge void *)(self.player));

如果 self.player 是您传递给回调函数的播放器实例。

然后实现回调:

void interruptionListenerCallback (void *inUserData, UInt32 interruptionState) {
   NSLog(@"itnerp state %li",interruptionState);
   NSLog(@"inUserData %@",inUserData);
   AVAudioPlayer *pl = (__bridge AVAudioPlayer*)inUserData;
   switch (interruptionState) {
    case 0:
        [pl play];
    break;

    case 1:
        [pl pause];
    break;
   }

}

祝你好运

沙尼

于 2012-06-22T14:40:47.383 回答
0

如果是 voip,则使用 audiosession.setmode

于 2013-01-06T06:54:07.630 回答