【语音处理】wav转pcm mp3转pcm Java示例代码

【语音处理】wav转pcmJava示例代码

都是作者亲测的代码哦。因各个音频之间存在差异导致转换会存在问题。建议大家自己有习惯看源码去了解音频相关知识的能力。

代码地址:https://gitee.com/xshuai/ai/blob/master/AIDemo/src/main/java/com/xs/audio/tns/WAVConvertPCM.java

• Wav转PCM

 

package com.xs.audio.tns;

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;
/**
 * WAV转PCM(截掉前44个字节数据)
 * @author Administrator
 *
 */
public class WAVConvertPCM {
	/**
	 * 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 static 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;
	}
}

• MP3转PCM

代码地址:https://gitee.com/xshuai/ai/blob/master/AIDemo/src/main/java/com/xs/audio/tns/MP3ConvertPCM.java

 

package com.xs.audio.tns;

import java.io.File;
import java.io.FileOutputStream;
import java.io.OutputStream;

import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioSystem;
/**
 * MP3转PCM Java方式实现
 * @author 小帅丶
 * @date 2017年12月6日
 */
public class MP3ConvertPCM {
	/**
	 * MP3转换PCM文件方法
	 * @param mp3filepath 原始文件路径
	 * @param pcmfilepath 转换文件的保存路径
	 * @throws Exception 
	 */
	public static void mp3Convertpcm(String mp3filepath,String pcmfilepath) throws Exception{
		File mp3 = new File(mp3filepath);
		File pcm = new File(pcmfilepath);
		//原MP3文件转AudioInputStream
		AudioInputStream mp3audioStream = AudioSystem.getAudioInputStream(mp3);
		//将AudioInputStream MP3文件 转换为PCM AudioInputStream
		AudioInputStream pcmaudioStream = AudioSystem.getAudioInputStream(AudioFormat.Encoding.PCM_SIGNED, mp3audioStream);
		//准备转换的流输出到OutputStream
		OutputStream os = new FileOutputStream(pcm);
		int bytesRead = 0;
		byte[] buffer = new byte[8192];
		while ((bytesRead=pcmaudioStream.read(buffer, 0, 8192))!=-1) {
			os.write(buffer, 0, bytesRead);
		}
		os.close();
		pcmaudioStream.close();
	}
}

需要用到的jar不支持maven引入

 

 

• 注意：需要下载MP3插件jar。才可以进行MP3CONVERTPCM 
• 下载地址一链接: https://pan.baidu.com/s/1nwmC4Xz 密码: fzqd
• 下载地址二链接: https://gitee.com/xshuai/ai/attach_files

 

或者用谷歌的jar支持maven引入

 

	
		com.googlecode.soundlibs
		mp3spi
		1.9.5.4