Java pcm文件与wav文件互转

梦里梦外; 2022-04-05 13:28 350阅读 0赞

# Java pcm文件与wav文件互转 #

2018年05月15日 14:32:28 [\-过期罐头][-] 阅读数：1432

代码所需要的jar包，百度云盘链接：[https://pan.baidu.com/s/1eX-zxMaaG1zZNL8AhLNs1A][https_pan.baidu.com_s_1eX-zxMaaG1zZNL8AhLNs1A] 密码：uogp

# **pcm转wav：** #

package test.voice;
    
    /**
     * pcm格式的文件转wav
     * @author 梁艳松
     * 
     */
    
    import java.io.FileInputStream;
    import java.io.FileOutputStream;
    import java.io.IOException;
    
    public class PcmToWav {
    
        public void aaaa() throws IOException{
            String src = "C://Users//dell-pc//Desktop//16k.pcm";
           FileInputStream fis = new FileInputStream(src);
           FileOutputStream fos = new FileOutputStream("C://Users//dell-pc//Desktop//test_DDDDD.wav");
    
           //计算长度
           int PCMSize = 0;
           byte[] buf = new byte[1024 * 4];
           int size = fis.read(buf);
    
           while (size != -1) {
              PCMSize += size;
              size = fis.read(buf);
            }
           fis.close();
    
           //填入参数，比特率等等。这里用的是16位单声道 8000 hz
           WaveHeader header = new WaveHeader();
           //长度字段 = 内容的大小（PCMSize) + 头部字段的大小(不包括前面4字节的标识符RIFF以及fileLength本身的4字节)
           header.fileLength = PCMSize + (44 - 8);
           header.FmtHdrLeth = 16;
           header.BitsPerSample = 16;
           header.Channels = 1;
           header.FormatTag = 0x0001;
           header.SamplesPerSec = 8000;
           header.BlockAlign = (short)(header.Channels * header.BitsPerSample / 8);
           header.AvgBytesPerSec = header.BlockAlign * header.SamplesPerSec;
           header.DataHdrLeth = PCMSize;
    
           byte[] h = header.getHeader();
    
           assert h.length == 44; //WAV标准，头部应该是44字节
           //write header
           fos.write(h, 0, h.length);
           //write data stream
           fis = new FileInputStream(src);
           size = fis.read(buf);
           while (size != -1) {
              fos.write(buf, 0, size);
              size = fis.read(buf);
           }
           fis.close();
           fos.close();
           System.out.println("Convert OK!");
    }
    }

# **wav转pcm：** #

package test.voice;
    
    import java.io.ByteArrayOutputStream;  
    import java.io.FileInputStream;  
    import java.io.FileOutputStream;  
    import java.io.IOException;  
    import java.util.Arrays;  
    
    import org.apache.commons.io.IOUtils;  
    
    public class WavToPcm {
        /** 
         * WAV转PCM文件 
         * @param wavfilepath wav文件路径 
         * @param pcmfilepath pcm要保存的文件路径及文件名 
         * @return 
         */  
        public String convertAudioFiles(String wavfilepath,String pcmfilepath){  
            FileInputStream fileInputStream;  
            FileOutputStream fileOutputStream;  
            try {  
                fileInputStream = new FileInputStream(wavfilepath);  
                fileOutputStream = new FileOutputStream(pcmfilepath);  
                byte[] wavbyte = InputStreamToByte(fileInputStream);  
                byte[] pcmbyte = Arrays.copyOfRange(wavbyte, 44, wavbyte.length);  
                fileOutputStream.write(pcmbyte);  
                IOUtils.closeQuietly(fileInputStream);  
                IOUtils.closeQuietly(fileOutputStream);  
            } catch (Exception e) {  
                System.out.println(e.getMessage());  
            }  
            return pcmfilepath;  
        }  
        /** 
         * 输入流转byte二进制数据 
         * @param fis 
         * @return 
         * @throws IOException 
         */  
        private static byte[] InputStreamToByte(FileInputStream fis) throws IOException {  
            ByteArrayOutputStream byteStream = new ByteArrayOutputStream();  
            long size = fis.getChannel().size();  
            byte[] buffer = null;  
            if (size <= Integer.MAX_VALUE) {  
                buffer = new byte[(int) size];  
            } else {  
                buffer = new byte[8];  
                for (int ix = 0; ix < 8; ++ix) {  
                    int offset = 64 - (ix + 1) * 8;  
                    buffer[ix] = (byte) ((size >> offset) & 0xff);  
                }  
            }  
            int len;  
            while ((len = fis.read(buffer)) != -1) {  
                byteStream.write(buffer, 0, len);  
            }  
            byte[] data = byteStream.toByteArray();  
            IOUtils.closeQuietly(byteStream);  
            return data;  
        }  
    }

[-]: https://me.csdn.net/lys1220
[https_pan.baidu.com_s_1eX-zxMaaG1zZNL8AhLNs1A]: https://pan.baidu.com/s/1eX-zxMaaG1zZNL8AhLNs1A