IOS利用AVPlayer开发多媒体在线播放器

最新推荐文章于 2020-03-04 16:44:24 发布

newHung

最新推荐文章于 2020-03-04 16:44:24 发布

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分类专栏： iOS 文章标签： ios开发

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在这里给AVPlayer播放在线音频文件作个记号

1.在H文件中初始：

==============
AVPlayer *mp3Player;
AVPlayerItem *mp3PlayerItem;
id audioMix;
id volumeMixInput;

2.在MM文件中：

 
   01. 
   //作品播放 
  
   02. 
   NSURL * songUrl = [NSURL URLWithString:userInfo.songUrl]; 
  
   03. 
   AVURLAsset *movieAsset    = [[[AVURLAsset alloc]initWithURL:songUrl options:nil]autorelease]; 
  
   04. 
     
   05. 
     
   06. 
   self. mp3PlayerItem = [AVPlayerItem playerItemWithAsset:movieAsset]; 
  
   07. 
   [self. mp3PlayerItem addObserver:self forKeyPath:@"status" options:0context:NULL]; 
  
   08. 
   self. mp3Player = [AVPlayer playerWithPlayerItem:self. mp3PlayerItem]; 
  
   09. 
   AVPlayerLayer *playerLayer = [AVPlayerLayer playerLayerWithPlayer:self. mp3Player]; 
  
   10. 
   playerLayer.frame = self.view.layer.bounds; 
  
   11. 
   playerLayer.videoGravity = AVLayerVideoGravityResizeAspect; 
  
   12. 
   [self.view.layer addSublayer:playerLayer]; 
  
   13. 
   [self. mp3Player setAllowsExternalPlayback:YES];

3.实现代理方法：

 
   01. 
   - (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context 
  
   02. 
   { 
  
   03. 
   if ([keyPath isEqualToString:@"status"]) 
  
   04. 
   { 
  
   05. 
   if (AVPlayerItemStatusReadyToPlay == self. mp3Player.currentItem.status) 
  
   06. 
   { 
  
   07. 
   [self. mp3Player play]; 
  
   08. 
   } 
  
   09. 
   } 
  
   10. 
   }

4.现实音量调整

 
   01. 
   -(void) setVolume:(float)volume{ 
  
   02. 
   //作品音量控制 
  
   03. 
   NSMutableArray *allAudioParams = [NSMutableArray array]; 
  
   04. 
   AVMutableAudioMixInputParameters *audioInputParams =[AVMutableAudioMixInputParameters audioMixInputParameters]; 
  
   05. 
   [audioInputParams setVolume:volume atTime:kCMTimeZero]; 
  
   06. 
   [audioInputParams setTrackID:1]; 
  
   07. 
   [allAudioParams addObject:audioInputParams]; 
  
   08. 
   audioMix = [AVMutableAudioMix audioMix]; 
  
   09. 
   [audioMix setInputParameters:allAudioParams]; 
  
   10. 
   [self. mp3PlayerItem setAudioMix:audioMix]; // Mute the player item 
  
   11. 
     
   12. 
   [avAudioPlayer setVolume:volume]; 
  
   13. 
   }

5.取得播放时间

 
   01. 
   - (NSTimeInterval) playableDuration 
  
   02. 
   { 
  
   03. 
   AVPlayerItem * item = self.worksPlayer.currentItem; 
  
   04. 
   if (item.status == AVPlayerItemStatusReadyToPlay) { 
  
   05. 
   return CMTimeGetSeconds(self.worksPlayer.currentItem.duration); 
  
   06. 
   } 
  
   07. 
   else 
  
   08. 
   { 
  
   09. 
   return(CMTimeGetSeconds(kCMTimeInvalid)); 
  
   10. 
   } 
  
   11. 
   } 
  
   12. 
   - (NSTimeInterval) playableCurrentTime 
  
   13. 
   { 
  
   14. 
   AVPlayerItem * item = self.worksPlayer.currentItem; 
  
   15. 
     
   16. 
   if (item.status == AVPlayerItemStatusReadyToPlay) { 
  
   17. 
   NSLog(@"%f\n",CMTimeGetSeconds(self.worksPlayer.currentItem.currentTime)); 
  
   18. 
   if(!playBeginState&&CMTimeGetSeconds(self.worksPlayer.currentItem.currentTime)==CMTimeGetSeconds(self.worksPlayer.currentItem.duration)) { 
  
   19. 
   [streamer stop]; 
  
   20. 
   } 
  
   21. 
   playBeginState = NO; 
  
   22. 
   return CMTimeGetSeconds(self.worksPlayer.currentItem.currentTime); 
  
   23. 
   } 
  
   24. 
   else 
  
   25. 
   { 
  
   26. 
   return(CMTimeGetSeconds(kCMTimeInvalid)); 
  
   27. 
   } 
  
28.}