使用Java声音API从WAV文件中修剪开始和结束
发布时间:2020-12-15 02:32:25 所属栏目:Java 来源:网络整理
导读:我有基础知识.但是,输出文件只是一遍又一遍地重复WAV标题.生成的文件大小合适,但它是垃圾邮件. 我正在尝试使用扩展AudioInputStream的类,以便我可以将它与其他代码无缝地结合使用,这些代码将它与另一个AudioInputStream(它工作得很漂亮)混合在一起. import j
我有基础知识.但是,输出文件只是一遍又一遍地重复WAV标题.生成的文件大小合适,但它是垃圾邮件.
我正在尝试使用扩展AudioInputStream的类,以便我可以将它与其他代码无缝地结合使用,这些代码将它与另一个AudioInputStream(它工作得很漂亮)混合在一起. import java.io.ByteArrayInputStream; import java.io.File; import java.io.FileWriter; import java.io.IOException; import javax.sound.sampled.AudioFileFormat; import javax.sound.sampled.AudioFormat; import javax.sound.sampled.AudioInputStream; import javax.sound.sampled.AudioSystem; import javax.sound.sampled.UnsupportedAudioFileException; public class TrimmerAIS extends AudioInputStream{ private final AudioInputStream stream; private final long startByte,endByte; private long t_bytesRead=0; public TrimmerAIS(AudioFormat audioFormat,AudioInputStream audioInputStream,long startMilli,long endMilli){ super(new ByteArrayInputStream(new byte[0]),audioFormat,AudioSystem.NOT_SPECIFIED); stream=audioInputStream; //startByte=(long)((startMilli/1000f)*stream.getFormat().getSampleRate()*stream.getFormat().getSampleSizeInBits()*stream.getFormat().getChannels())/8; //endByte=(long)((endMilli/1000f)*stream.getFormat().getSampleRate()*stream.getFormat().getSampleSizeInBits()*stream.getFormat().getChannels())/8; startByte=(long)((startMilli/1000)*stream.getFormat().getFrameRate()*stream.getFormat().getFrameSize()); endByte=(long)((endMilli/1000)*stream.getFormat().getFrameRate()*stream.getFormat().getFrameSize()); } private byte[] tempBuffer; @Override public int available() throws IOException{ return (int)(endByte-startByte-t_bytesRead); } public int read(byte[] abData,int nOffset,int nLength) throws IOException{ // set up the temporary byte buffer if(tempBuffer==null||tempBuffer.length<nLength){ tempBuffer=new byte[nLength]; } int bytesRead=0; if(t_bytesRead<startByte){ do{//skip to starting byte bytesRead=(int)skip(startByte-t_bytesRead); t_bytesRead+=bytesRead; }while(t_bytesRead<startByte); } if(t_bytesRead>=endByte){ return -1; } bytesRead=stream.read(tempBuffer,nLength); if(bytesRead==-1){//premature EOF return -1; }else if(bytesRead==0){ return 0; } t_bytesRead+=bytesRead; if(t_bytesRead>=endByte){//correct bytes read to exclude any bytes over the limit bytesRead=(int)(bytesRead-(t_bytesRead-endByte)); } return bytesRead; } public static void main(String[] args) throws UnsupportedAudioFileException,IOException{ AudioInputStream music=null; music = AudioSystem.getAudioInputStream(new File("music/0.wav")); music=new TrimmerAIS(music.getFormat(),music,15000); AudioSystem.write(music,AudioFileFormat.Type.WAVE,new File("out.wav")); } } 我根本找不到任何错误. 解决方法
嘿,哎呀!只需要删除tempBuffer并用abData替换它.是漫长的一天.
以下是更正后的代码.考虑删除这个,因为这是一个简单的错误,但我创建这个类的唯一原因是因为它还不存在. import java.io.ByteArrayInputStream; import java.io.File; import java.io.IOException; import javax.sound.sampled.AudioFileFormat; import javax.sound.sampled.AudioFormat; import javax.sound.sampled.AudioInputStream; import javax.sound.sampled.AudioSystem; import javax.sound.sampled.UnsupportedAudioFileException; public class TrimmerAIS extends AudioInputStream{ private final AudioInputStream stream; private final long startByte,endByte; private long t_bytesRead=0; public TrimmerAIS(AudioFormat audioFormat,AudioSystem.NOT_SPECIFIED); stream=audioInputStream; //calculate where to start and where to end startByte=(long)((startMilli/1000)*stream.getFormat().getFrameRate()*stream.getFormat().getFrameSize()); endByte=(long)((endMilli/1000)*stream.getFormat().getFrameRate()*stream.getFormat().getFrameSize()); } @Override public int available() throws IOException{ return (int)(endByte-startByte-t_bytesRead); } public int read(byte[] abData,int nLength) throws IOException{ int bytesRead=0; if(t_bytesRead<startByte){ do{ bytesRead=(int)skip(startByte-t_bytesRead); t_bytesRead+=bytesRead; }while(t_bytesRead<startByte); } if(t_bytesRead>=endByte)//end reached. signal EOF return -1; bytesRead=stream.read(abData,nLength); if(bytesRead==-1) return -1; else if(bytesRead==0) return 0; t_bytesRead+=bytesRead; if(t_bytesRead>=endByte)// "trim" the extra by altering the number of bytes read bytesRead=(int)(bytesRead-(t_bytesRead-endByte)); return bytesRead; } public static void main(String[] args) throws UnsupportedAudioFileException,new File("out.wav")); } } (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |