Xunfei speech synthesis pcm to wav

The java version of iFLYTEK speech synthesis can only generate pcm format files at present, and pcm to wav is required in the project

iFLYTEK speech synthesis

Tools

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

		   //calculate length
		   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();

		   // Fill in the parameters, bit rate, etc. I'm using 16 bit mono 8000 hz here
		   WaveHeader header = new WaveHeader();
		   //Length field = the size of the content (PCMSize) + the size of the header field (excluding the first 4 bytes of identifier RIFF and the 4 bytes of fileLength itself)
		   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 standard, the header should be 44 bytes
		   //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(forest, fileID);
	   WriteInt(bos, fileLength);
	   WriteChar(bos, wavTag);
	   WriteChar(forest, FmtHdrID);
	   WriteInt(bos,FmtHdrLeth);
	   WriteShort(bos,FormatTag);
	   WriteShort(bos,Channels);
	   WriteInt(bos,SamplesPerSec);
	   WriteInt(bos,AvgBytesPerSec);
	   WriteShort(bos,BlockAlign);
	   WriteShort(bos,BitsPerSample);
	   WriteChar(forest,DataHdrID);
	   WriteInt(forest,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);
	   }
	}
}