- 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;
- }
- public void convert(String v3File , String wavFile) throws Exception{
- BufferedInputStream fileInput = null;
- BufferedOutputStream fileOut = null;
- 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 };
- File file = new File(v3File);
- /* step size index */
- int ssindex = 0;
- if(file == null) {
- CCFLogger.logger.info("没有找到文件:" + v3File);
- return ;
- }
- fileInput = new BufferedInputStream(new FileInputStream(file));
- fileOut = new BufferedOutputStream (new FileOutputStream(wavFile));
- 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();
- } catch (Exception e) {
- 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();
- } catch (IOException e) {}
- return ;
- }
- }
- //该片段来自于http://www.codesnippet.cn/detail/241020136644.html
来源: http://www.codesnippet.cn/detail/241020136644.html