include/wvtelephony.h

   1 /* -*- Mode: C -*-
   2  * Worldvisions Weaver Software:
   3  *   Copyright (C) 1997-2003 Net Integration Technologies, Inc.
   4  *
   5  * Telephony routines: echo cancellation, dc offset removal, automatic
   6  * gain control, etc.
   7  *
   8  * This is all implemented in plain old C so that it cooperates will with
   9  * kernel drivers.
  10  */
  11 #ifndef TELEPHONY_H
  12 #define TELEPHONY_H
  13
  14 #ifdef __cplusplus
  15 extern "C" {
  16 #endif
  17
  18 #include <string.h> /* To get size_t */
  19
  20 extern void echo_cancel(const short *out_buf,
  21         const short *in,
  22         size_t block_size,
  23         int *filter_q16,
  24         size_t filter_size,
  25         short *echo_cancelled_in);
  26
  27 #ifdef __cplusplus
  28 };
  29 #endif
  30 #endif