comparison wdf/fir.h @ 0:5242703e91d3 tip

Initial checkin for AIM92 aimR8.2 (last updated May 1997).

+/*
+    Copyright (c) Applied Psychology Unit, Medical Research Council. 1988, 1989
+    ===========================================================================
+
+    Permission to use, copy, modify, and distribute this software without fee 
+    is hereby granted for research purposes, provided that this copyright 
+    notice appears in all copies and in all supporting documentation, and that 
+    the software is not redistributed for any fee (except for a nominal shipping 
+    charge). Anyone wanting to incorporate all or part of this software in a
+    commercial product must obtain a license from the Medical Research Council.
+
+    The MRC makes no representations about the suitability of this 
+    software for any purpose.  It is provided "as is" without express or implied 
+    warranty.
+ 
+    THE MRC DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING 
+    ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL THE
+    A.P.U. BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY 
+    DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN 
+    AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 
+    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+/*  
+    Acknowledgment:
+    ==============
+
+    The source code provided in this file was originally developed by 
+    Christian Giguere as part of a Ph.D degree at the Department of
+    Engineering of the University of Cambridge from April 1990 to
+    November 1993. The code was subsequently adapted under a grant
+    from the Hearing Research Trust for full compatibility with 
+    AIM Release 6.15.
+
+    Christian Giguere 25/03/94
+
+*/
+
+/*
+    ===========================================================
+    fir.h 
+    ===========================================================
+
+    Finite Impulse Response (FIR) filtering module.
+    
+    Author        : Christian Giguere
+    First written : 12th November, 1990
+    Last edited   : 22nd September, 1991
+    ===========================================================
+*/
+
+#ifndef _FIR_H_
+
+
+/***** defines *****/
+
+#define _FIR_H_
+
+
+/****** private data structure for FIR filters *****/
+
+typedef struct _fir_filter_state FIRfilterState ;
+
+struct _fir_filter_state {
+  char *states ;                              /* FIR state vector */ 
+  int  number_of_states ;                     /* number of states */
+  char *coeffs ;                              /* FIR coefficient vector */
+  int  number_of_coeffs ;                     /* number of coefficients */
+  } ;
+
+
+/***** externals *****/
+
+extern FIRfilterState *NewLpFIRfilter() ;
+extern void            DoFIRfilter(), CloseFIRfilter() ;
+
+#endif
+