使用Java Sound API播放MP3

你能提出一个build议，我怎么写一首曲子呢？

我尝试了下面的代码片段，但是我得到了这个exception：

import sun.audio.*; import java.io.*; class tester { public static void main(String args[]) throws Exception { InputStream in=new FileInputStream("tester.mp3"); AudioStream as=new AudioStream(in); AudioPlayer.player.start(as); } } 

Answer 1

如前所述，Java Sound默认不支持MP3。 对于它在任何特定JRE中支持的types，请检查AudioSystem.getAudioFileTypes() 。

添加对读取MP3的支持的一种方法是将基于JMF的mp3plugin.jar ¹添加到应用程序的运行时类path。

1. 这个联系被认为是不完全可靠的。 Jar也可以在我的软件共享驱动器上使用 。

至于你的实际问题，虽然javax.sound.sampled.Clip可能看起来很适合这种任务，但不幸的是它只能保存一秒钟的立体声，16位，44.1KHz的声音。 这就是为什么我开发BigClip 。 （它有自己的循环问题，如果你修复它们，报告回来。）

 package org.pscode.xui.sound.bigclip; import java.awt.Component; import javax.swing.*; // J2SE 1.3 import javax.sound.sampled.*; import java.io.*; // J2SE 1.4 import java.util.logging.*; import java.util.Arrays; /** An implementation of the javax.sound.sampled.Clip that is designed to handle Clips of arbitrary size, limited only by the amount of memory available to the app. It uses the post 1.4 thread behaviour (daemon thread) that will stop the sound running after the main has exited. <ul> <li>2012-07-24 - Fixed bug in size of byte array (2^16 -> (int)Math.pow(2, 16)). <li>2009-09-01 - Fixed bug that had clip ..clipped at the end, by calling drain() (before calling stop()) on the dataline after the play loop was complete. Improvement to frame and microsecond position determination. <li>2009-08-17 - added convenience constructor that accepts a Clip. Changed the private convertFrameToM..seconds methods from 'micro' to 'milli' to reflect that they were dealing with units of 1000/th of a second. <li>2009-08-14 - got rid of flush() after the sound loop, as it was cutting off tracks just before the end, and was found to be not needed for the fast-forward/rewind functionality it was introduced to support. <li>2009-08-11 - First binary release. </ul> NB Remove @Override notation and logging to use in 1.3+ @since 1.5 @version 2009-08-17 @author Andrew Thompson */ public class BigClip implements Clip, LineListener { /** The DataLine used by this Clip. */ private SourceDataLine dataLine; /** The raw bytes of the audio data. */ private byte[] audioData; /** The stream wrapper for the audioData. */ private ByteArrayInputStream inputStream; /** Loop count set by the calling code. */ private int loopCount; /** Internal count of how many loops to go. */ private int countDown; /** The start of a loop point. Defaults to 0. */ private int loopPointStart; /** The end of a loop point. Defaults to the end of the Clip. */ private int loopPointEnd; /** Stores the current frame position of the clip. */ private int framePosition; /** Thread used to run() sound. */ private Thread thread; /** Whether the sound is currently playing or active. */ private boolean active; /** Stores the last time bytes were dumped to the audio stream. */ private long timelastPositionSet; private int bufferUpdateFactor = 2; /** The parent Component for the loading progress dialog. */ Component parent = null; /** Used for reporting messages. */ private Logger logger = Logger.getAnonymousLogger(); /** Default constructor for a BigClip. Does nothing. Information from the AudioInputStream passed in open() will be used to get an appropriate SourceDataLine. */ public BigClip() {} /** There are a number of AudioSystem methods that will return a configured Clip. This convenience constructor allows us to obtain a SourceDataLine for the BigClip that uses the same AudioFormat as the original Clip. @param clip Clip The Clip used to configure the BigClip. */ public BigClip(Clip clip) throws LineUnavailableException { dataLine = AudioSystem.getSourceDataLine( clip.getFormat() ); } /** Provides the entire audio buffer of this clip. @return audioData byte[] The bytes of the audio data that is loaded in this Clip. */ public byte[] getAudioData() { return audioData; } /** Sets a parent component to act as owner of a "Loading track.." progress dialog. If null, there will be no progress shown. */ public void setParentComponent(Component parent) { this.parent = parent; } /** Converts a frame count to a duration in milliseconds. */ private long convertFramesToMilliseconds(int frames) { return (frames/(long)dataLine.getFormat().getSampleRate())*1000; } /** Converts a duration in milliseconds to a frame count. */ private int convertMillisecondsToFrames(long milliseconds) { return (int)(milliseconds/dataLine.getFormat().getSampleRate()); } @Override public void update(LineEvent le) { logger.log(Level.FINEST, "update: " + le ); } @Override public void loop(int count) { logger.log(Level.FINEST, "loop(" + count + ") - framePosition: " + framePosition); loopCount = count; countDown = count; active = true; inputStream.reset(); start(); } @Override public void setLoopPoints(int start, int end) { if ( start<0 || start>audioData.length-1 || end<0 || end>audioData.length ) { throw new IllegalArgumentException( "Loop points '" + start + "' and '" + end + "' cannot be set for buffer of size " + audioData.length); } if (start>end) { throw new IllegalArgumentException( "End position " + end + " preceeds start position " + start); } loopPointStart = start; framePosition = loopPointStart; loopPointEnd = end; } @Override public void setMicrosecondPosition(long milliseconds) { framePosition = convertMillisecondsToFrames(milliseconds); } @Override public long getMicrosecondPosition() { return convertFramesToMilliseconds(getFramePosition()); } @Override public long getMicrosecondLength() { return convertFramesToMilliseconds(getFrameLength()); } @Override public void setFramePosition(int frames) { framePosition = frames; int offset = framePosition*format.getFrameSize(); try { inputStream.reset(); inputStream.read(new byte[offset]); } catch(Exception e) { e.printStackTrace(); } } @Override public int getFramePosition() { long timeSinceLastPositionSet = System.currentTimeMillis() - timelastPositionSet; int size = dataLine.getBufferSize()*(format.getChannels()/2)/bufferUpdateFactor; int framesSinceLast = (int)((timeSinceLastPositionSet/1000f)* dataLine.getFormat().getFrameRate()); int framesRemainingTillTime = size - framesSinceLast; return framePosition - framesRemainingTillTime; } @Override public int getFrameLength() { return audioData.length/format.getFrameSize(); } AudioFormat format; @Override public void open(AudioInputStream stream) throws IOException, LineUnavailableException { AudioInputStream is1; format = stream.getFormat(); if (format.getEncoding()!=AudioFormat.Encoding.PCM_SIGNED) { is1 = AudioSystem.getAudioInputStream( AudioFormat.Encoding.PCM_SIGNED, stream ); } else { is1 = stream; } format = is1.getFormat(); InputStream is2; if (parent!=null) { ProgressMonitorInputStream pmis = new ProgressMonitorInputStream( parent, "Loading track..", is1); pmis.getProgressMonitor().setMillisToPopup(0); is2 = pmis; } else { is2 = is1; } byte[] buf = new byte[ (int)Math.pow(2, 16) ]; int totalRead = 0; int numRead = 0; ByteArrayOutputStream baos = new ByteArrayOutputStream(); numRead = is2.read( buf ); while (numRead>-1) { baos.write( buf, 0, numRead ); numRead = is2.read( buf, 0, buf.length ); totalRead += numRead; } is2.close(); audioData = baos.toByteArray(); AudioFormat afTemp; if (format.getChannels()<2) { afTemp = new AudioFormat( format.getEncoding(), format.getSampleRate(), format.getSampleSizeInBits(), 2, format.getSampleSizeInBits()*2/8, // calculate frame size format.getFrameRate(), format.isBigEndian() ); } else { afTemp = format; } setLoopPoints(0,audioData.length); dataLine = AudioSystem.getSourceDataLine(afTemp); dataLine.open(); inputStream = new ByteArrayInputStream( audioData ); } @Override public void open(AudioFormat format, byte[] data, int offset, int bufferSize) throws LineUnavailableException { byte[] input = new byte[bufferSize]; for (int ii=0; ii<input.length; ii++) { input[ii] = data[offset+ii]; } ByteArrayInputStream inputStream = new ByteArrayInputStream(input); try { AudioInputStream ais1 = AudioSystem.getAudioInputStream(inputStream); AudioInputStream ais2 = AudioSystem.getAudioInputStream(format, ais1); open(ais2); } catch( UnsupportedAudioFileException uafe ) { throw new IllegalArgumentException(uafe); } catch( IOException ioe ) { throw new IllegalArgumentException(ioe); } // TODO - throw IAE for invalid frame size, format. } @Override public float getLevel() { return dataLine.getLevel(); } @Override public long getLongFramePosition() { return dataLine.getLongFramePosition()*2/format.getChannels(); } @Override public int available() { return dataLine.available(); } @Override public int getBufferSize() { return dataLine.getBufferSize(); } @Override public AudioFormat getFormat() { return format; } @Override public boolean isActive() { return dataLine.isActive(); } @Override public boolean isRunning() { return dataLine.isRunning(); } @Override public boolean isOpen() { return dataLine.isOpen(); } @Override public void stop() { logger.log(Level.FINEST, "BigClip.stop()"); active = false; // why did I have this commented out? dataLine.stop(); if (thread!=null) { try { active = false; thread.join(); } catch(InterruptedException wakeAndContinue) { } } } public byte[] convertMonoToStereo(byte[] data, int bytesRead) { byte[] tempData = new byte[bytesRead*2]; if (format.getSampleSizeInBits()==8) { for(int ii=0; ii<bytesRead; ii++) { byte b = data[ii]; tempData[ii*2] = b; tempData[ii*2+1] = b; } } else { for(int ii=0; ii<bytesRead-1; ii+=2) { //byte b2 = is2.read(); byte b1 = data[ii]; byte b2 = data[ii+1]; tempData[ii*2] = b1; tempData[ii*2+1] = b2; tempData[ii*2+2] = b1; tempData[ii*2+3] = b2; } } return tempData; } boolean fastForward; boolean fastRewind; public void setFastForward(boolean fastForward) { logger.log(Level.FINEST, "FastForward " + fastForward); this.fastForward = fastForward; fastRewind = false; flush(); } public boolean getFastForward() { return fastForward; } public void setFastRewind(boolean fastRewind) { logger.log(Level.FINEST, "FastRewind " + fastRewind); this.fastRewind = fastRewind; fastForward = false; flush(); } public boolean getFastRewind() { return fastRewind; } /** TODO - fix bug in LOOP_CONTINUOUSLY */ @Override public void start() { Runnable r = new Runnable() { public void run() { try { /* Should these open()/close() calls be here, or explicitly called by user program? The JavaDocs for line suggest that Clip should throw an IllegalArgumentException, so we'll stick with that and call it explicitly. */ dataLine.open(); dataLine.start(); int bytesRead = 0; int frameSize = dataLine.getFormat().getFrameSize(); int bufSize = dataLine.getBufferSize(); boolean startOrMove = true; byte[] data = new byte[bufSize]; int offset = framePosition*frameSize; int totalBytes = offset; inputStream.read(new byte[offset], 0, offset); logger.log(Level.FINEST, "loopCount " + loopCount ); while ((bytesRead = inputStream.read(data,0,data.length)) != -1 && (loopCount==Clip.LOOP_CONTINUOUSLY || countDown>0) && active ) { logger.log(Level.FINEST, "BigClip.start() loop " + framePosition ); totalBytes += bytesRead; int framesRead; byte[] tempData; if (format.getChannels()<2) { tempData = convertMonoToStereo(data, bytesRead); framesRead = bytesRead/ format.getFrameSize(); bytesRead*=2; } else { framesRead = bytesRead/ dataLine.getFormat().getFrameSize(); tempData = Arrays.copyOfRange(data, 0, bytesRead); } framePosition += framesRead; if (framePosition>=loopPointEnd) { framePosition = loopPointStart; inputStream.reset(); countDown--; logger.log(Level.FINEST, "Loop Count: " + countDown ); } timelastPositionSet = System.currentTimeMillis(); byte[] newData; if (fastForward) { newData = getEveryNthFrame(tempData, 2); } else if (fastRewind) { byte[] temp = getEveryNthFrame(tempData, 2); newData = reverseFrames(temp); inputStream.reset(); totalBytes -= 2*bytesRead; framePosition -= 2*framesRead; if (totalBytes<0) { setFastRewind(false); totalBytes = 0; } inputStream.skip(totalBytes); logger.log(Level.INFO, "totalBytes " + totalBytes); } else { newData = tempData; } dataLine.write(newData, 0, newData.length); if (startOrMove) { data = new byte[bufSize/ bufferUpdateFactor]; startOrMove = false; } } logger.log(Level.FINEST, "BigClip.start() loop ENDED" + framePosition ); active = false; dataLine.drain(); dataLine.stop(); /* should these open()/close() be here, or explicitly called by user program? */ dataLine.close(); } catch (LineUnavailableException lue) { logger.log( Level.SEVERE, "No sound line available!", lue ); if (parent!=null) { JOptionPane.showMessageDialog( parent, "Clear the sound lines to proceed", "No audio lines available!", JOptionPane.ERROR_MESSAGE); } } } }; thread= new Thread(r); // makes thread behaviour compatible with JavaSound post 1.4 thread.setDaemon(true); thread.start(); } /** Assume the frame size is 4. */ public byte[] reverseFrames(byte[] data) { byte[] reversed = new byte[data.length]; byte[] frame = new byte[4]; for (int ii=0; ii<data.length/4; ii++) { int first = (data.length)-((ii+1)*4)+0; int last = (data.length)-((ii+1)*4)+3; frame[0] = data[first]; frame[1] = data[(data.length)-((ii+1)*4)+1]; frame[2] = data[(data.length)-((ii+1)*4)+2]; frame[3] = data[last]; reversed[ii*4+0] = frame[0]; reversed[ii*4+1] = frame[1]; reversed[ii*4+2] = frame[2]; reversed[ii*4+3] = frame[3]; if (ii<5 || ii>(data.length/4)-5) { logger.log(Level.FINER, "From \t" + first + " \tlast " + last ); logger.log(Level.FINER, "To \t" + ((ii*4)+0) + " \tlast " + ((ii*4)+3) ); } } /* for (int ii=0; ii<data.length; ii++) { reversed[ii] = data[data.length-1-ii]; } */ return reversed; } /** Assume the frame size is 4. */ public byte[] getEveryNthFrame(byte[] data, int skip) { int length = data.length/skip; length = (length/4)*4; logger.log(Level.FINEST, "length " + data.length + " \t" + length); byte[] b = new byte[length]; //byte[] frame = new byte[4]; for (int ii=0; ii<b.length/4; ii++) { b[ii*4+0] = data[ii*skip*4+0]; b[ii*4+1] = data[ii*skip*4+1]; b[ii*4+2] = data[ii*skip*4+2]; b[ii*4+3] = data[ii*skip*4+3]; } return b; } @Override public void flush() { dataLine.flush(); } @Override public void drain() { dataLine.drain(); } @Override public void removeLineListener(LineListener listener) { dataLine.removeLineListener(listener); } @Override public void addLineListener(LineListener listener) { dataLine.addLineListener(listener); } @Override public Control getControl(Control.Type control) { return dataLine.getControl(control); } @Override public Control[] getControls() { if (dataLine==null) { return new Control[0]; } else { return dataLine.getControls(); } } @Override public boolean isControlSupported(Control.Type control) { return dataLine.isControlSupported(control); } @Override public void close() { dataLine.close(); } @Override public void open() throws LineUnavailableException { throw new IllegalArgumentException("illegal call to open() in interface Clip"); } @Override public Line.Info getLineInfo() { return dataLine.getLineInfo(); } /** Determines the single largest sample size of all channels of the current clip. This can be handy for determining a fraction to scal visual representations. @return Double between 0 & 1 representing the maximum signal level of any channel. */ public double getLargestSampleSize() { int largest = 0; int current; boolean signed = (format.getEncoding()==AudioFormat.Encoding.PCM_SIGNED); int bitDepth = format.getSampleSizeInBits(); boolean bigEndian = format.isBigEndian(); int samples = audioData.length*8/bitDepth; if (signed) { if (bitDepth/8==2) { if (bigEndian) { for (int cc = 0; cc < samples; cc++) { current = (audioData[cc*2]*256 + (audioData[cc*2+1] & 0xFF)); if (Math.abs(current)>largest) { largest = Math.abs(current); } } } else { for (int cc = 0; cc < samples; cc++) { current = (audioData[cc*2+1]*256 + (audioData[cc*2] & 0xFF)); if (Math.abs(current)>largest) { largest = Math.abs(current); } } } } else { for (int cc = 0; cc < samples; cc++) { current = (audioData[cc] & 0xFF); if (Math.abs(current)>largest) { largest = Math.abs(current); } } } } else { if (bitDepth/8==2) { if (bigEndian) { for (int cc = 0; cc < samples; cc++) { current = (audioData[cc*2]*256 + (audioData[cc*2+1] - 0x80)); if (Math.abs(current)>largest) { largest = Math.abs(current); } } } else { for (int cc = 0; cc < samples; cc++) { current = (audioData[cc*2+1]*256 + (audioData[cc*2] - 0x80)); if (Math.abs(current)>largest) { largest = Math.abs(current); } } } } else { for (int cc = 0; cc < samples; cc++) { if ( audioData[cc]>0 ) { current = (audioData[cc] - 0x80); if (Math.abs(current)>largest) { largest = Math.abs(current); } } else { current = (audioData[cc] + 0x80); if (Math.abs(current)>largest) { largest = Math.abs(current); } } } } } // audioData logger.log(Level.FINEST, "Max signal level: " + (double)largest/(Math.pow(2, bitDepth-1))); return (double)largest/(Math.pow(2, bitDepth-1)); } } 

Answer 2

Sun Sound API不播放MP3

当我需要它时，我使用JavaZOOM jLayer库（http://www.javazoom.net/javalayer/javalayer.html）。;

为了能够播放MP3，您仍然需要添加MP3SPI（随jLayer一起提供）。

Answer 3

我试图根据BigClip代码遇到的错误进行编辑，但是它被拒绝了。 以下代码是我对该程序的修补程序。 请记住，其中一些还没有经过testing，因为我并不真正关心循环，快进或倒带。

编辑：冉testing和更新的代码，因为它不与倒带/快进。 现在它可以工作，但仍然没有testing循环，虽然它理论上应该工作。

获取更新的BigClip代码： http ：//pastie.org/4523763

Answer 4

使用media.io的在线服务将文件转换为.wav ; 然后在你的程序中使用它。

Answer 5

  String file="SOME//SONGFILE//PATH"; FileInputStream fis = new FileInputStream(file); BufferedInputStream bis = new BufferedInputStream(fis); player = new Player(bis); player.play(); 

你必须拥有的jar文件夹：mp3plugin.jar和jlayer.jar（做谷歌）

Answer 6

我不相信java AudioStream类本地支持MP3。 根据这个链接 ，它只支持AIFF，AU和WAV。 您将不得不考虑使用另一个库来加载和播放一个MP3文件。

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