java - 冲突的Jar方法

我一直在尝试用Java制作我的第一个GUI音乐播放器。到目前为止，我已经能够使用Javasound和MP3SPI播放MP3。现在，我想支持.m4a歌曲，而我研究过的最佳库是JAAD。我下载了它，并将其添加到我的项目中，当我尝试播放.m4a歌曲时，它可以完美运行。当我在添加JAAD库后尝试播放.mp3时，会发生问题。我播放歌曲的代码是：

File file = new File(pathToSong);
AudioInputStream audioStream= AudioSystem.getAudioInputStream(file); // Obtains an audio input stream of the song
    AudioFormat baseFormat = audioStream.getFormat();    //Obtains the audio format of the song in the audio input stream.
    decodedFormat = new AudioFormat(AudioFormat.Encoding.PCM_SIGNED, //The type of encoding for the audio stream
                    baseFormat.getSampleRate(), //Sample rate of the audio stream
                    16, //Number of bits in each sample of a sound that has this format.
                    baseFormat.getChannels(),   //Number of audio channels in this audio stream
                    baseFormat.getChannels() * 2,   //Number of bytes in each frame of the audiostream
                    baseFormat.getSampleRate(), //Number of frames played or recorded per second, for the sound in the audio stream
                    false); //Data stored in little-endian order

decodedAudioStream = AudioSystem.getAudioInputStream(decodedFormat, audioStream); //Obtains an audio input stream of the indicated encoding by converting the provided audio input stream.

playSong(); //Play the song

（playSong（）只需读取流并将字节写入SourceDataLine）

添加JAAD库后尝试播放.mp3时出现的错误如下：

java.io.IOException: Resetting to invalid mark
    at java.io.BufferedInputStream.reset(BufferedInputStream.java:416)
    at net.sourceforge.jaad.spi.javasound.AACAudioFileReader.getAudioInputStream(AACAudioFileReader.java:118)
    at net.sourceforge.jaad.spi.javasound.AACAudioFileReader.getAudioInputStream(AACAudioFileReader.java:143)
    at javax.sound.sampled.AudioSystem.getAudioInputStream(AudioSystem.java:1162)
    at Song.run(Song.java:38)

以我的理解，似乎Javasound和JAAD的getAudioInputStream是冲突的。如何解决此冲突？

最佳答案

好吧，我找到了一个基于berry150的代码并同时使用MP3SPI和JAAD的解决方案，答案在这里：JAAD stopping other providers from working。
首先，必须在类路径中订购jar，以便在JAAD之前加载JLayer，MP3SPI和Tritonous Share。然后，为了获取AudioInputStream，请使用以下代码：

if (getAudioFormat().equals(".mp3")) {
    audioStream = AudioSystem.getAudioInputStream(file); // Obtains an audio input stream of the song
            }
else if (getAudioFormat().equals(".m4a")){
    audioStream = new AACAudioFileReader().getAudioInputStream(file);
            }

所以发生的事情是，如果音频是mp3，则Javasound的getAudioStreamMethod（）将首先被调用，因为它的JAR被首先加载。如果音频为.m4a，则将创建ACCAudioFileReader（）的新实例，并调用JAAD库的getAudioInputStream（）。