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dcbias.c
Package: 一个类似QQ的软件源码.rar [view]
Upload User: zslianheng
Upload Date: 2013-04-03
Package Size: 946k
Code Size: 2k
Category:
Linux-Unix program
Development Platform:
Visual C++
- /*
- $Log: dcbias.c,v $
- Revision 1.1.1.1 2002/07/28 05:23:19 freeman_yong
- lpc10 codec
- * Revision 1.1 1996/08/19 22:40:23 jaf
- * Initial revision
- *
- */
- #ifdef P_R_O_T_O_T_Y_P_E_S
- extern int dcbias_(integer *len, real *speech, real *sigout);
- #endif
- /* -- translated by f2c (version 19951025).
- You must link the resulting object file with the libraries:
- -lf2c -lm (in that order)
- */
- #include "f2c.h"
- /* ********************************************************************* */
- /* DCBIAS Version 50 */
- /* $Log: dcbias.c,v $
- /* Revision 1.1.1.1 2002/07/28 05:23:19 freeman_yong
- /* lpc10 codec
- /*
- * Revision 1.1 1996/08/19 22:40:23 jaf
- * Initial revision
- * */
- /* Revision 1.3 1996/03/18 21:19:22 jaf */
- /* Just added a few comments about which array indices of the arguments */
- /* are used, and mentioning that this subroutine has no local state. */
- /* Revision 1.2 1996/03/13 16:44:53 jaf */
- /* Comments added explaining that none of the local variables of this */
- /* subroutine need to be saved from one invocation to the next. */
- /* Revision 1.1 1996/02/07 14:44:21 jaf */
- /* Initial revision */
- /* ********************************************************************* */
- /* Calculate and remove DC bias from buffer. */
- /* Input: */
- /* LEN - Length of speech buffers */
- /* SPEECH - Input speech buffer */
- /* Indices 1 through LEN read. */
- /* Output: */
- /* SIGOUT - Output speech buffer */
- /* Indices 1 through LEN written */
- /* This subroutine has no local state. */
- /* Subroutine */ int dcbias_(integer *len, real *speech, real *sigout)
- {
- /* System generated locals */
- integer i__1;
- /* Local variables */
- real bias;
- integer i__;
- /* Arguments */
- /* Local variables that need not be saved */
- /* Parameter adjustments */
- --sigout;
- --speech;
- /* Function Body */
- bias = 0.f;
- i__1 = *len;
- for (i__ = 1; i__ <= i__1; ++i__) {
- bias += speech[i__];
- }
- bias /= *len;
- i__1 = *len;
- for (i__ = 1; i__ <= i__1; ++i__) {
- sigout[i__] = speech[i__] - bias;
- }
- return 0;
- } /* dcbias_ */