diff wdf/wdf_ear.h @ 0:5242703e91d3 tip

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

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/wdf/wdf_ear.h	Fri May 20 15:19:45 2011 +0100
@@ -0,0 +1,117 @@
+/*
+    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
+
+*/
+
+/*
+    ===========================================================
+    wdf_ear.h 
+    ===========================================================
+
+    Wave digital filter (WDF) implementation of the outer and
+    middle ear (EAR) electroacoustic networks.
+ 
+    Author        : Christian Giguere
+    First written : 01st July, 1991 
+    Last edited   : 17th February, 1994
+    ===========================================================
+*/
+
+#ifndef _WDF_EAR_H_
+
+
+/***** defines *****/
+
+#define _WDF_EAR_H_
+
+
+/***** private data structures for WDF-EAR module *****/
+
+typedef struct _wave_wdf_state      WaveWDFstate ;
+typedef struct _eartube_wdf_state   EartubeWDFstate ;
+typedef struct _earmiddle_wdf_state EarmiddleWDFstate ;
+
+struct _wave_wdf_state {
+  double gamma01 ;                        /* WDF multiplier coefficients (Adaptors 0-2) */
+  double gamma11 ;
+  double gamma21 ;
+  int    Nstates ;                        /* number of states stored */
+  char   *states ;                        /* WDF state vector */
+  } ;
+
+struct _eartube_wdf_state {
+  double gamma31 ;                        /* WDF multiplier coefficients (Adaptors 3-6) */
+  double gamma41 ;
+  double gamma51 ;
+  double gamma61 ;
+  int    Nstates ;                        /* number of states stored */
+  char   *states ;                        /* WDF state vector */
+  } ;
+
+struct _earmiddle_wdf_state {
+  double gamma71 ;                        /* WDF multiplier coefficients (Adaptors 7-22) */
+  double gamma81,  gamma82  ;
+  double gamma91,  gamma92  ;
+  double gamma101 ;
+  double gamma111, gamma112 ;
+  double gamma121 ;
+  double gamma131 ;
+  double gamma141 ;
+  double gamma151 ;
+  double gamma161 ;
+  double gamma171, gamma172 ;
+  double gamma181 ;
+  double gamma191 ;
+  double gamma201, gamma202 ;
+  double gamma211, gamma212 ;
+  double gamma221 ;
+  double ratio ;                          /* transformer ratio between oval window and eardrum */
+  void   (*update_proc)() ;               /* procedure to update time-varying coeff gamma221 */
+  int    Nstates ;                        /* number of states stored */
+  char   *states ;                        /* WDF state vector */
+  double out_scale ;                      /* output gain */
+  } ;
+
+
+/***** externals *****/
+
+extern WaveWDFstate      *FreefieldWDF() ;
+extern EartubeWDFstate   *EartubeWDF() ;
+extern EarmiddleWDFstate *EarmiddleWDF() ;
+extern void               DoEarWDF(), CloseEarWDF() ;
+
+#endif
+