路由 iPhone 音频声音

3 回答

• 11

  为此，您必须在设置音频会话时添加属性侦听器：

  AudioSessionAddPropertyListener(kAudioSessionProperty_AudioRouteChange, audioSessionPropertyListener, nil);
  

  哪里

  void audioSessionPropertyListener(void* inClientData, AudioSessionPropertyID inID,
                                            UInt32 inDataSize, const void* inData) {
            UInt32 audioRouteOverride = kAudioSessionOverrideAudioRoute_Speaker;
  
            if (!isHeadsetPluggedIn()) 
              AudioSessionSetProperty (kAudioSessionProperty_OverrideAudioRoute,sizeof (audioRouteOverride),&audioRouteOverride);
          }
  
  BOOL isHeadsetPluggedIn() {
    UInt32 routeSize = sizeof (CFStringRef);
    CFStringRef route;
  
    OSStatus error = AudioSessionGetProperty (kAudioSessionProperty_AudioRoute,
                                              &routeSize,
                                              &route
                                              );
  
       if (!error && (route != NULL) && ([(NSString*)route rangeOfString:@"Head"].location != NSNotFound)) {
          NSLog(@"HeadsetPluggedIn");
          return YES;
        }
        NSLog(@"Headset_NOT_PluggedIn");
        return NO;
      }
  

  因此，当耳机插入或拔出时，您会收到通知并更改音频输出方向。

  回复于 2024-05-10T19:35:43+08:00
• 1

  这是一种快速而肮脏的方式，似乎对我有用：

  void sessionPropertyListener(void * inClientData，
  AudioSessionPropertyID inID，
  UInt32 inDataSize，
  const void * inData){

  if(inID == kAudioSessionProperty_AudioRouteChange)
  {
  CFStringRef newRoute;
  UInt32 size = sizeof(CFStringRef);
  AudioSessionGetProperty(kAudioSessionProperty_AudioRoute，＆size，＆newRoute);
  if(newRoute)
  {
  CFShow(newRoute);
  if(CFStringCompare(newRoute，CFSTR(“ReceiverAndMicrophone”)，
  (UInt32)NULL)== kCFCompareEqualTo)//if 接收器，通过扬声器播放
  {
  UInt32 audioRouteOverride = kAudioSessionOverrideAudioRoute_Speaker;
  AudioSessionSetProperty(kAudioSessionProperty_OverrideAudioRoute，
  sizeof(audioRouteOverride)
  ＆audioRouteOverride);
  }
  否则 if(CFStringCompare(newRoute，CFSTR(“HeadsetInOut”)，
  (UInt32)NULL)== kCFCompareEqualTo)//headset
  {
  UInt32 audioRouteOverride = kAudioSessionOverrideAudioRoute_None;
  AudioSessionSetProperty(kAudioSessionProperty_OverrideAudioRoute，
  sizeof(audioRouteOverride)
  ＆audioRouteOverride);
  }
  }
  }
  }

  回复于 2024-05-10T19:35:43+08:00
• 0

  With AudioSessionSetProperty deprecated since iOS 7 we should be using AVFoundation AVAudioSession. Since the desired action is to allow a user action to override the route through the speaker you might consider the difference between AVAudioSessionPortOverrideSpeaker and AVAudioSessionCategoryOptionDefaultToSpeaker.

  According to Technical bulletin Q&A QA1754: "When using AVAudioSessionCategoryOptionDefaultToSpeaker, user gestures will be honored. For example, plugging in a headset will cause the route to change to headset mic/headphones and unplugging the headset will cause the route to change to built-in mic/speaker".

  Note that the technical bulletin explains that AVAudioSessionPortOverrideSpeaker would be more appropriate for use with a speakerphone button for example, which is not what the original post was asking for.

  https://developer.apple.com/library/ios/qa/qa1754/_index.html

  My own implementation is called before I invoke the player as follows:

  NSError *error;
  AVAudioSession* audioSession   = [AVAudioSession sharedInstance];
  [audioSession setCategory:AVAudioSessionCategoryPlayAndRecord withOptions:AVAudioSessionCategoryOptionDefaultToSpeaker error:&error];
  // handle any error
  // initiate the player or recorder
  [_player play];
  

  此问题类似于在另一个相关帖子中提到的问题。

  根据这里提到的相同技术公告“想想使用 overrideOutputAudioPort：就你可能用来实现一个扬声器按钮而言，你希望能够在扬声器(AVAudioSessionPortOverrideSpeaker)和正常输出路径(AVAudioSessionPortOverrideNone)之间切换。 “

  如果您正在寻找实现扬声器覆盖 overrideOutputPort 类别，请参阅该帖子：如何在不使用 AudioSessionSetProperty 的情况下将音频路由到扬声器？

  回复于 2024-05-10T19:35:43+08:00