外部出力(AirPlay/HDMI)をAVPlayerを使わずに検知する

ExternalOutputDetecte.m

- (BOOL)isExternalPlayback                                                                                                                                               
{                                                                                                                                                                        
    __block BOOL isExternalOutput = NO;                                                                                                                                   
    // 入出力を取得                                                                                                                                                       
    AVAudioSessionRouteDescription *audioRouteDesc = [[AVAudioSession sharedInstance] currentRoute];                                                                      
    // 出力を取得                                                                                                                                                         
    NSArray *outputs = audioRouteDesc.outputs;                                                                                                                            
    [outputs enumerateObjectsUsingBlock:^(AVAudioSessionPortDescription *audioDesc, NSUInteger idx, BOOL *stop) {                                                         
        if([audioDesc.portType isEqualToString:AVAudioSessionPortAirPlay]){                                                                                               
            NSLog(@"AirPlay(๑˃̵ᴗ˂̵)ﻭ");                                                                                                                                     
            *stop = YES;                                                                                                                                                  
            isExternalPlayback = YES;                                                                                                                                     
        } else if ([audioDesc.portType isEqualToString:AVAudioSessionPortHDMI]){                                                                                          
            NSLog(@"HDMI(｡╹ω╹｡)");                                                                                                                                       
            *stop = YES;                                                                                                                                                  
            isExternalOutput = YES;                                                                                                                                       
        } else {                                                                                                                                                          
            // その他                                                                                                                                                     
        }                                                                                                                                                                 
    }];                                                                                                                                                                   
                                                                                                                                                                          
    return result;                                                                                                                                                        
}