讯飞语音合成pcm转wav

java版讯飞语音合成，目前只能生成pcm格式文件，在项目中需求pcm转wav

讯飞语音合成

工具类

public class Pcm2Wave {
	
	public static  void convertAudioFiles(String src, String target) throws Exception {
		
		
		   FileInputStream fis = new FileInputStream(src);
		   FileOutputStream fos = new FileOutputStream(target);

		   //计算长度
		   byte[] buf = new byte[1024 * 4];
		   int size = fis.read(buf);
		   int PCMSize = 0;
		   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 = 16000;//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!");
		}
}

public class WaveHeader {

	public final char fileID[] = {'R', 'I', 'F', 'F'};
	   public int fileLength;
	   public char wavTag[] = {'W', 'A', 'V', 'E'};;
	   public char FmtHdrID[] = {'f', 'm', 't', ' '};
	   public int FmtHdrLeth;
	   public short FormatTag;
	   public short Channels;
	   public int SamplesPerSec;
	   public int AvgBytesPerSec;
	   public short BlockAlign;
	   public short BitsPerSample;
	   public char DataHdrID[] = {'d','a','t','a'};
	   public int DataHdrLeth;

	public byte[] getHeader() throws IOException {
	   ByteArrayOutputStream bos = new ByteArrayOutputStream();
	   WriteChar(bos, fileID);
	   WriteInt(bos, fileLength);
	   WriteChar(bos, wavTag);
	   WriteChar(bos, FmtHdrID);
	   WriteInt(bos,FmtHdrLeth);
	   WriteShort(bos,FormatTag);
	   WriteShort(bos,Channels);
	   WriteInt(bos,SamplesPerSec);
	   WriteInt(bos,AvgBytesPerSec);
	   WriteShort(bos,BlockAlign);
	   WriteShort(bos,BitsPerSample);
	   WriteChar(bos,DataHdrID);
	   WriteInt(bos,DataHdrLeth);
	   bos.flush();
	   byte[] r = bos.toByteArray();
	   bos.close();
	   return r;
	}

	private void WriteShort(ByteArrayOutputStream bos, int s) throws IOException {
	   byte[] mybyte = new byte[2];
	   mybyte[1] =(byte)( (s << 16) >> 24 );
	   mybyte[0] =(byte)( (s << 24) >> 24 );
	   bos.write(mybyte);
	}


	private void WriteInt(ByteArrayOutputStream bos, int n) throws IOException {
	   byte[] buf = new byte[4];
	   buf[3] =(byte)( n >> 24 );
	   buf[2] =(byte)( (n << 8) >> 24 );
	   buf[1] =(byte)( (n << 16) >> 24 );
	   buf[0] =(byte)( (n << 24) >> 24 );
	   bos.write(buf);
	}

	private void WriteChar(ByteArrayOutputStream bos, char[] id) {
	   for (int i=0; i<id.length; i++) {
	      char c = id[i];
	      bos.write(c);
	   }
	}
}