forked from ChrisVeigl/BrainBay
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ob_filter.cpp
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ob_filter.cpp
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/* -----------------------------------------------------------------------------
BrainBay Version 1.8, GPL 2003-2011, contact: chris@shifz.org
MODULE: OB_FILTER.CPP: contains assisting functions for the Filter-Object
Authors: Jim Peters, Chris Veigl
This module calls into the fid-lib filter library by Jim Peters to provide
filter functionalities. The Filter-Type and order can be selected.
A brief preview of the filter's frequency-response is shown in the
filter-toolbox-window. For a better display check out Jim Peters fiview-tool:
http://uazu.net/fiview
do_filt_design: Initialises a new filter using the init-String
(for exemple LpBe for a low-pass - bessel filter, see fiview-documentation)
and additional filter-parameters (like order, from-, to-freqeuncy)
update_filterdialog: enables/disables init-parameters according to the filter-type
FilterBoxDlgHandler: processes events for the filter-toolbox window.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; See the
GNU General Public License for more details.
-----------------------------------------------------------------------------*/
#include "brainBay.h"
#include "ob_filter.h"
struct FILTERTYPEStruct FILTERTYPE[FILTERTYPES]=
{{"BandStop Resonator","BsRe/",1},
{"LowPass Bessel","LpBe",1},
{"HighPass Bessel","HpBe",1},
{"BandPass Bessel","BpBe",2},
{"BandStop Bessel","BsBe",2},
{"LowPass Butterworth","LpBu",1},
{"HighPass Butterworth","HpBu",1},
{"BandPass Butterworth","BpBu",2},
{"BandStop Butterworth","BsBu",2}};
/* // I had problems with Chebyshev Filters (filter setup crashed) ..
"LowPass Chebyshev","LpCh"
"HighPass Chebyshev","HpCh"
"BandPass Chebyshev","BpCh"
"BandStop Chebyshev", "BsCh"
*/
int test_filterparams(int type,int p0,float p1,float p2)
{
if ((type<0)||(type>=FILTERTYPES)) return FALSE;
if (p0<1) return FALSE;
if ((p1<0.000001f)||(p1>=1024.0f)) return FALSE;
if ((p2<0.000001f)||(p2>=1024.0f)) return FALSE;
switch (type)
{
case 0: if (p0>=100) return FALSE; break;
case 1:
case 2:
case 3:
case 4: if (p0>=11) return FALSE; break;
case 5:
case 6: if (p0>=60) return FALSE; break;
case 7:
case 8: if (p0>=30) return FALSE; break;
}
return (TRUE);
}
FidFilter * do_filt_design(HWND hDlg, int ftype)
{
char sztemp[30];
char szorder[5];
int p0;
float p1,p2;
BOOL trans;
p0=GetDlgItemInt(hDlg, IDC_FILTERPAR0, &trans, 0); if (!trans) p0=0;
GetDlgItemText(hDlg,IDC_FILTERPAR1,sztemp,sizeof(sztemp));
sscanf(sztemp,"%f",&p1);
GetDlgItemText(hDlg,IDC_FILTERPAR2,sztemp,sizeof(sztemp));
sscanf(sztemp,"%f",&p2);
if (test_filterparams(ftype,p0,p1,p2))
{
strcpy(sztemp,FILTERTYPE[ftype].init);
GetDlgItemText(hDlg, IDC_FILTERPAR0, szorder, sizeof(szorder));
strcat(sztemp,szorder);
return (fid_design(sztemp, PACKETSPERSECOND, p1,p2,0,0));
}
return (NULL);
}
void update_filterdialog(HWND hDlg, int filternum)
{
if (filternum>=0)
{
switch (FILTERTYPE[filternum].param) {
case 1 : SetDlgItemText(hDlg, IDC_PAR0CAPT, "Filter Order");
SetDlgItemText(hDlg, IDC_PAR1CAPT, "Freq (Hz)");
SetDlgItemText(hDlg, IDC_PAR2CAPT, "");
EnableWindow(GetDlgItem(hDlg, IDC_FILTERPAR2), FALSE);
break;
case 2 :SetDlgItemText(hDlg, IDC_PAR0CAPT, "Filter Order");
SetDlgItemText(hDlg, IDC_PAR1CAPT, "from (Hz)");
SetDlgItemText(hDlg, IDC_PAR2CAPT, "to (Hz)");
EnableWindow(GetDlgItem(hDlg, IDC_FILTERPAR2), TRUE);
break;
}
}
}
/*-----------------------------------------------------------------------------
FUNCTION: CALLBACK FilterboxDlgHandler( HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam )
PURPOSE: Handles Messages for Filteredit Dialog
PARAMETERS:
hDlg - Dialog window handle
-----------------------------------------------------------------------------*/
LRESULT CALLBACK FilterboxDlgHandler( HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam )
{
int t; // ,z;
char newname[25],sztemp[30];
static int acttype;
static int dinit=FALSE;
static FidFilter * tempf=NULL,* newf=NULL;
FILTEROBJ * st;
st = (FILTEROBJ *) actobject;
if ((st==NULL)||(st->type!=OB_FILTER)) return(FALSE);
switch( message )
{
case WM_INITDIALOG:
dinit=TRUE;
SendMessage(GetDlgItem(hDlg, IDC_FILTERTYPECOMBO), CB_RESETCONTENT,0,0);
for (t = 0; t < FILTERTYPES; t++)
SendMessage( GetDlgItem(hDlg, IDC_FILTERTYPECOMBO), CB_ADDSTRING, 0, (LPARAM) (LPSTR) FILTERTYPE[t].tname) ;
SetDlgItemText(hDlg,IDC_FILTERTYPECOMBO, FILTERTYPE[st->filtertype].tname);
SetDlgItemText(hDlg,IDC_FILTERNEWNAME, st->name);
SetDlgItemInt(hDlg,IDC_FROMFREQ, st->dispfrom,0);
SetDlgItemInt(hDlg,IDC_TOFREQ, st->dispto,0);
SetDlgItemInt(hDlg,IDC_FILTERPAR0, st->par0,0);
sprintf(sztemp,"%.5f",st->par1);
SetDlgItemText(hDlg,IDC_FILTERPAR1, sztemp);
sprintf(sztemp,"%.5f",st->par2);
SetDlgItemText(hDlg,IDC_FILTERPAR2, sztemp);
acttype=st->filtertype;
dinit=FALSE;
newf=do_filt_design(hDlg,acttype);
if (newf) tempf=newf;
update_filterdialog(hDlg,st->filtertype);
return TRUE;
case WM_CLOSE:
EndDialog(hDlg, LOWORD(wParam));
return TRUE;
break;
case WM_COMMAND:
switch (LOWORD(wParam)) {
case IDC_FILTERTYPECOMBO:
acttype=SendMessage( GetDlgItem(hDlg, IDC_FILTERTYPECOMBO), CB_GETCURSEL, 0, 0 ) ;
update_filterdialog(hDlg,acttype);
case IDC_FILTERPAR0:
case IDC_FILTERPAR1:
case IDC_FILTERPAR2:
case IDC_FROMFREQ:
case IDC_TOFREQ:
if (!dinit)
{
newf=do_filt_design(hDlg,acttype);
if (newf) tempf=newf;
InvalidateRect(hDlg,NULL,TRUE);
}
break;
case IDC_FILTERSTORE:
if (newf)
{
GetDlgItemText(hDlg, IDC_FILTERNEWNAME,newname,sizeof(newname));
st->filtertype=acttype;
st->par0=GetDlgItemInt(hDlg,IDC_FILTERPAR0, NULL, 0);
GetDlgItemText(hDlg,IDC_FILTERPAR1,sztemp,sizeof(sztemp));
sscanf(sztemp,"%f",&st->par1);
GetDlgItemText(hDlg,IDC_FILTERPAR2,sztemp,sizeof(sztemp));
st->dispfrom=GetDlgItemInt(hDlg, IDC_FROMFREQ, NULL, 0);
st->dispto=GetDlgItemInt(hDlg, IDC_TOFREQ, NULL, 0);
sscanf(sztemp,"%f",&st->par2);
strcpy(st->name,newname);
st->filt=do_filt_design(hDlg, acttype);
st->run= fid_run_new(st->filt, &(st->funcp));
if (st->fbuf!=NULL)
{
fid_run_freebuf(st->fbuf);
st->fbuf=fid_run_newbuf(st->run);
}
}
break;
}
return(TRUE);
case WM_PAINT:
{
PAINTSTRUCT ps;
HDC hdc;
RECT rect;
HPEN tpen;
HBRUSH tbrush;
int height;
int f1,f2;
float fstep,val,x;
hdc = BeginPaint (hDlg, &ps);
GetClientRect(hDlg, &rect);
tpen = CreatePen (PS_SOLID,1,0);
SelectObject (hdc, tpen);
tbrush = CreateSolidBrush(RGB(240,240,240));
SelectObject(hdc,tbrush);
rect.top+=80;
rect.bottom -= 18;
height= rect.bottom-rect.top;
Rectangle(hdc,rect.left,rect.top-1,rect.right,rect.bottom+20);
Rectangle(hdc,rect.left,rect.top-1,rect.right,rect.bottom);
Rectangle(hdc,rect.left,rect.bottom-(int)(height/1.3),rect.right,rect.bottom);
DeleteObject(tbrush);
DeleteObject(tpen);
tpen = CreatePen (PS_SOLID,1,RGB(0,100,0));
SelectObject (hdc, tpen);
f1=GetDlgItemInt(hDlg, IDC_FROMFREQ, NULL, 0);
f2=GetDlgItemInt(hDlg, IDC_TOFREQ, NULL, 0);
fstep=(float)(f2-f1)/(rect.right-rect.left);
MoveToEx(hdc,rect.left+1,rect.bottom-(int)(height*fid_response(tempf, (float)f1/256.0)/1.3),NULL);
for (t=rect.left; t<rect.right; t++)
{
MoveToEx(hdc,1+t,rect.bottom,NULL);
LineTo(hdc,1+t,rect.bottom-(int)(height*fid_response(tempf, (((float)f1+fstep*(t-rect.left))/PACKETSPERSECOND))/1.3));
}
SelectObject(hdc, DRAW.scaleFont);
wsprintf(sztemp,"1.0");
ExtTextOut( hdc, rect.left+2,rect.top+(int)(height*0.2308), 0, &rect,sztemp, strlen(sztemp), NULL ) ;
val=(f2-f1)/10.0f;
fstep=((rect.right-25)-rect.left)/10.0f;
for (t=0; t<=10; t++)
{
x=f1+val*t;
wsprintf(sztemp,"%d.%d",(int)x,(int)(x*10)%10);
ExtTextOut( hdc, rect.left+2+(int)(fstep*t),rect.bottom+2, 0, &rect,sztemp, strlen(sztemp), NULL ) ;
}
DeleteObject(tpen);
EndPaint(hDlg, &ps );
}
break;
case WM_SIZE:
case WM_MOVE: update_toolbox_position(hDlg);
break;
return(TRUE);
}
return FALSE;
}
//
// Object Implementation
//
FILTEROBJ::FILTEROBJ(int num) : BASE_CL()
{
outports = 1;
inports = 1;
strcpy(in_ports[0].in_name,"in");
strcpy(out_ports[0].out_name,"out");
filtertype=3;
par0=8;
par1=8;
par2=12;
dispfrom=4;
dispto=15;
filt= fid_design("BpBe8", PACKETSPERSECOND, 8, 12, 0, 0);
run= fid_run_new(filt, &(funcp));
fbuf=fid_run_newbuf(run);
strcpy(name,"Alpha Bessel");
}
void FILTEROBJ::session_start(void)
{
if (fbuf!=NULL) fid_run_freebuf(fbuf);
fbuf=fid_run_newbuf(run);
}
void FILTEROBJ::session_reset(void)
{
if (fbuf!=NULL) fid_run_freebuf(fbuf);
fbuf=fid_run_newbuf(run);
}
void FILTEROBJ::session_pos(long pos)
{
if (fbuf!=NULL) fid_run_freebuf(fbuf);
fbuf=fid_run_newbuf(run);
}
void FILTEROBJ::make_dialog(void)
{
display_toolbox(hDlg=CreateDialog(hInst, (LPCTSTR)IDD_FILTERBOX, ghWndStatusbox, (DLGPROC)FilterboxDlgHandler));
}
void FILTEROBJ::load(HANDLE hFile)
{
char sztemp[30];
char szorder[5];
load_object_basics(this);
load_property("name",P_STRING,name);
load_property("type",P_INT,&filtertype);
load_property("order",P_INT,&par0);
load_property("display-from",P_INT,&dispfrom);
load_property("display-to",P_INT,&dispto);
load_property("par1",P_FLOAT,&par1);
load_property("par2",P_FLOAT,&par2);
if (fbuf!=NULL) fid_run_freebuf(fbuf);
if (filt!=NULL) fid_run_free(filt);
strcpy(sztemp,FILTERTYPE[filtertype].init);
wsprintf(szorder,"%d",par0);
strcat(sztemp,szorder);
filt=fid_design(sztemp, PACKETSPERSECOND, par1, par2, 0, 0);
run= fid_run_new(filt, &(funcp));
fbuf=fid_run_newbuf(run);
}
void FILTEROBJ::save(HANDLE hFile)
{
save_object_basics(hFile, this);
save_property(hFile,"name",P_STRING,name);
save_property(hFile,"type",P_INT,&filtertype);
save_property(hFile,"display-from",P_INT,&dispfrom);
save_property(hFile,"display-to",P_INT,&dispto);
save_property(hFile,"order",P_INT,&par0);
save_property(hFile,"par1",P_FLOAT,&par1);
save_property(hFile,"par2",P_FLOAT,&par2);
}
void FILTEROBJ::incoming_data(int port, float value) { input=value; }
void FILTEROBJ::work(void)
{ float x;
x=(float)(funcp(fbuf,(double)input));
// if ((filtertype==2)||(filtertype==3)||(filtertype==6)||(filtertype==7)) x+=512.0f;
pass_values(0,x);
}
FILTEROBJ::~FILTEROBJ()
{
if (fbuf!=NULL) fid_run_freebuf(fbuf);
if (filt!=NULL) fid_run_free(filt);
}