iOS SoundTouch框架歌曲BPM Detection示例

Question

我仍然在寻找计算BPM的工作代码，你们中的任何人都解决了这个问题吗？感谢任何帮助。

这是我的代码，它返回0值或错误值（与在线BPM值相比）

-(void) calcBPM {

   NSString *path = [[NSBundle mainBundle] pathForResource:@"song_test" ofType:@"mp3"];
   NSData *data = [NSData dataWithContentsOfFile:path];

   AVAudioPlayer *player =[[AVAudioPlayer alloc] initWithData:data error:NULL];
   NSUInteger len = [player.data length];

   soundtouch::SAMPLETYPE sampleBuffer[len];

   [player.data getBytes:sampleBuffer length:len];

   soundtouch::BPMDetect BPM(player.numberOfChannels, [[player.settings valueForKey:@"AVSampleRateKey"] longValue]);
   BPM.inputSamples(sampleBuffer, len/player.numberOfChannels);
   NSLog(@"Beats Per Minute = %f", BPM.getBpm());
   }