import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import org.apache.commons.net.ftp.FTPClient;
import org.apache.commons.net.ftp.FTPClientConfig;
import org.apache.commons.net.ftp.FTPFile;
import com.eshore.ccf.CCFLogger;
public class V3FileUtil {
private String voxfreq
= "6000";
public V3FileUtil() {
}
public void long2Byte(byte[] output, long[] input, int len) {
int i, j;
for (i = 0, j = 0; j < len; i++, j += 4) {
output[j] = (byte) (input[i] & 0xffL);
output[j + 1] = (byte) ((input[i] >>> 8) & 0xffL);
output[j + 2] = (byte) ((input[i] >>> 16) & 0xffL);
output[j + 3] = (byte) ((input[i] >>> 24) & 0xffL);
}
}
public void short2Byte(byte[] output, short sh) {
output[0] = (byte) (sh & 0xffL);
output[1] = (byte) ((sh >>> 8) & 0xffL);
}
public short byte2Short(byte b) {
return b < 0 ? (short) (b & 0x7F + 128) : b;
}
int[] indsft = { -1, -1, -1,-1, 2, 4, 6, 8 };
int[] stpsz = { 16, 17, 19, 21, 23, 25, 28, 31, 34, 37, 41, 45, 50, 55,
60, 66, 73, 80, 88, 97, 107, 118, 130, 143, 157, 173, 190, 209,
230, 253, 279, 307, 337, 371, 408, 449, 494, 544, 598, 658,
724, 796, 876, 963, 1060, 1166, 1282, 1411, 1552, 1707, 1878,
2066, 2272, 2499, 2749, 3024, 3327, 3660, 4026, 4428, 4871,
5358, 5894, 6484, 7132, 7845, 8630, 9493, 10442, 11487, 12635,
13899, 15289, 16818, 18500, 20350, 22385, 24623, 27086, 29794 };
/* nibble to bit map */
int nbl2bit[][] = { { 0, 0, 0, 0 }, { 0, 0, 0, 1 }, { 0, 0, 1, 0 },
{ 0, 0, 1, 1 }, { 0, 1, 0, 0 }, { 0, 1, 0, 1 }, { 0, 1, 1, 0 },
{ 0, 1, 1, 1 }, { 1, 0, 0, 0 }, { 1, 0, 0, 1 }, { 1, 0, 1, 0 },
{ 1, 0, 1, 1 }, { 1, 1, 0, 0 }, { 1, 1, 0, 1 }, { 1, 1, 1, 0 },
{ 1, 1, 1, 1 } };
/* sign table */
int sgns[] = { 1, -1 };
/* step size index */
int ssindex = 0;
if(file == null) {
CCFLogger.logger.info("没有找到文件:" + v3File);
return ;
}
long lPCMHDR[] = { 0x46464952, 0, 0x45564157, 0x20746d66, 16,
0x10001, 0, 0, 0x100002, 0x61746164, 0 };
lPCMHDR[1] = 4 * file.length() + 0x30; // 文件长度
lPCMHDR
[6] = Integer.
parseInt(voxfreq
);
lPCMHDR
[7] = 2 * Integer.
parseInt(voxfreq
);
lPCMHDR[10] = 4 * file.length();
// 先写一个头
byte[] b = new byte[44];
long2Byte(b, lPCMHDR, 44);
fileOut.write(b, (int) 0, b.length);
short iVal = 0;
int pos = 0;
byte[] szBuf = new byte[128 * 1024];
int diff;
short incoded;
byte[] szDesBuf = new byte[4 * 128 * 1024];
int dwRead = 0;
while ((dwRead = fileInput.read(szBuf, 0, 128 * 1024))!= -1) {
for (int idx = 0; idx < dwRead - 1; idx++) {
incoded = (short) (byte2Short(szBuf[idx]) / 16);
diff = sgns[nbl2bit[incoded][0]]
* (stpsz[ssindex] * nbl2bit[incoded][1]
+ (stpsz[ssindex] / 2)
* nbl2bit[incoded][2]
+ (stpsz[ssindex] / 4)
* nbl2bit[incoded][3] + (stpsz[ssindex] / 8));
ssindex = ssindex + indsft[(incoded % 8)];
if (ssindex < 0)
ssindex = 0;
if (ssindex > 48)
ssindex = 48;
iVal += diff;
if (iVal > 2047)
iVal = 2047;
else if (iVal < -2047)
iVal = -2047;
byte[] b2 = new byte[2];
short2Byte(b2, (short) (iVal * 16));
szDesBuf[pos] = b2[0];
pos++;
szDesBuf[pos] = b2[1];
pos++;
// /////////////////////////////////////////////////
incoded = (short) (byte2Short(szBuf[idx]) % 16);
diff = sgns[nbl2bit[incoded][0]]
* (stpsz[ssindex] * nbl2bit[incoded][1]
+ (stpsz[ssindex] / 2)
* nbl2bit[incoded][2]
+ (stpsz[ssindex] / 4)
* nbl2bit[incoded][3] + (stpsz[ssindex] / 8));
ssindex = ssindex + indsft[(incoded % 8)];
if (ssindex < 0)
ssindex = 0;
if (ssindex > 48)
ssindex = 48;
iVal += diff;
//波长
if (iVal > 2047)
iVal = 2047;
else if (iVal < -2047)
iVal = -2047;
byte[] b3 = new byte[2];
short2Byte(b3, (short) (iVal * 16));
szDesBuf[pos] = b3[0];
pos++;
szDesBuf[pos] = b3[1];
pos++;
}
try {
fileOut.write(szDesBuf, 0, dwRead * 4 );
fileOut.flush();
CCFLogger.logger.error("转换文件失败!", e);
}
pos = 0;
}
CCFLogger.logger.error("转换文件到wav成功.......................");
try {
if (fileInput != null) fileInput.close();
if (fileOut != null) fileOut.close();
return ;
}
}
//java/5530