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author | markster <markster@f38db490-d61c-443f-a65b-d21fe96a405b> | 2000-01-05 08:20:27 +0000 |
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committer | markster <markster@f38db490-d61c-443f-a65b-d21fe96a405b> | 2000-01-05 08:20:27 +0000 |
commit | 758d7ac6f9c4db1450b46c6efd2f98280e193ca8 (patch) | |
tree | 2fbfe62756299e2a74e810a68d049ad0c39aa93b /codecs/lpc10/dcbias.c | |
parent | cdf6951894d16b31021b98a0a6d3b950ea61b55f (diff) |
Version 0.1.2 from FTP
git-svn-id: http://svn.digium.com/svn/asterisk/trunk@169 f38db490-d61c-443f-a65b-d21fe96a405b
Diffstat (limited to 'codecs/lpc10/dcbias.c')
-rwxr-xr-x | codecs/lpc10/dcbias.c | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/codecs/lpc10/dcbias.c b/codecs/lpc10/dcbias.c new file mode 100755 index 000000000..a78f490e7 --- /dev/null +++ b/codecs/lpc10/dcbias.c @@ -0,0 +1,95 @@ +/* + +$Log$ +Revision 1.1 2000/01/05 08:20:39 markster +Version 0.1.2 from FTP + +Revision 1.2 2000/01/05 08:20:39 markster +Some OSS fixes and a few lpc changes to make it actually work + + * 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 */ + +/* $Log$ + * Revision 1.1 2000/01/05 08:20:39 markster + * Version 0.1.2 from FTP + * +/* Revision 1.2 2000/01/05 08:20:39 markster +/* Some OSS fixes and a few lpc changes to make it actually work +/* + * 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_ */ + |