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sweepscr.c
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/* sweepscr.c
* Screen handling for ncurses SweepGEN program
* Jim Jackson Oct 99
*/
/*
* Copyright (C) 1997-2008
* Jim Jackson [email protected]
*
* 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; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program - see the file COPYING; if not, write to
* the Free Software Foundation, Inc., 675 Mass Ave, Cambridge,
* MA 02139, USA.
*/
#include <time.h>
#include <errno.h>
#include <stdlib.h>
#include "scfio.h"
#include "sweepgen.h"
#include <sys/soundcard.h>
/* set number of millisecs to wait while checking for ESC sequences */
#define KEY_DELAY 25
/* Main screen character strings............
*/
char *hl[]={
" /====\\ /====\\ ====== |\\ | ",
" | | | | \\ | ",
" \\====\\ | | /-\\ /-\\ /--\\ | __ |=== | \\ | ",
" | | | | / | / | | | | | | \\ | ",
" \\====/ \\/\\/ \\-- \\-- |--/ \\====/ ====== | \\| ",
" | ",
" Digital Sweep | Generator ",
" -----------------------------------------------------------------------------",
NULL };
char *oh[]={
" /\\ ",
" --/--\\--/-- ",
" \\/ ",
NULL };
char *sig=" Jim Jackson <[email protected]> ";
char VERS[128];
int Lsamplerate, /* Local copy of card params to prevent */
LNfb,
Lafmt,Lstereo; /* playing being screwed while updating */
/* card characteristics. */
int fragtim; /* Playing Time of one fragment in Microsecs */
char Mchan1[]=" Sweep WaveForm ",
Mchan2[]=" Swept WaveForm ",
Mstarting[]=" Starting up .......... ",
Mwavef[]=" Waveform: ",
Mfreq[]= " Frequency: Hz",
Mfreq1[]= " Frequency From: Hz To: Hz",
Mfreq2[]= " Centre: Hz +/- Hz",
Mratio[]=" M/S Ratio: ",
Mgain[]= "Hz Gain: ",
Msampl[]=" samples/sec x byte ms buffers",
Minfo[]=" : ",
Mtime[16]="",
Mstereo[]="STEREO",
Mmono[]= " MONO ",
M16b[]= "16 bit",
M8b[]= " 8 bit",
Mmain[]=
"Tab/Return move fields, 'Q'uit, 'S'etup samplerate etc",
Mcard[]=
"'S'et new values Tab/Return move to next field.";
char *Mbits[]={ M8b, M16b, NULL };
char *Mchans[]={ Mmono, Mstereo, NULL };
struct SCField
FsamP= { SCF_string, 8, 0, 0, Msampl, 80, 0, 0 },
FsamV= { SCF_integer, 8, 0, 0, &Lsamplerate, 6, 0, 0 },
Fbits= { SCF_option, 8, 19, 0, Mbits, 6, 0, 0 },
Fchans= { SCF_option, 8, 26, 0, Mchans, 6, 0, 0 },
FNfrag= { SCF_integer, 8, 33, 0, &LNfb, 2, 0, 0 },
Ffrag= { SCF_integer, 8, 36, 0, &fragsize, 6, 0, 0 },
Ffragtim= { SCF_integer, 8, 48, 0, &fragtim, 8, 0, 0, 3 },
FinfoP= { SCF_string, 21, 0, 0, Minfo, 80, 0, 0 },
FinfoP2= { SCF_string, 22, 0, 0, Minfo, 80, 0, 0 },
Finfo= { SCF_string, 21, 3, 0, Mstarting, 75, 0, 0 },
Finfo2= { SCF_string, 22, 3, 0, "", 75, 0, 0 },
Ftime= { SCF_string, 8, 69, 0, Mtime, 10, 0, 0 },
Fchan1= { SCF_string, 11, 0, 0, Mchan1, 12, 0, 0 },
Fwav1P= { SCF_string, 12, 2, 0, Mwavef, 12, 0, 0 },
Fwav1V= { SCF_option, 12, 14, 0, NULL, 8, 0, 0 },
FfreqP= { SCF_string, 12, 22, 0, Mfreq, 22, 0, 0 },
FfreqV= { SCF_integer, 12, 34, 0, &freq, 8, 0, 0 },
Fchan2= { SCF_string, 15, 0, 0, Mchan2, 12, 0, 0 },
Fwav2P= { SCF_string, 16, 2, 0, Mwavef, 12, 0, 0 },
Fwav2V= { SCF_option, 16, 14, 0, NULL, 8, 0, 0 },
Ffrq1P= { SCF_string, 16, 22, 0, Mfreq1, 48, 0, 0 },
Ffrq2P= { SCF_string, 17, 22, 0, Mfreq2, 48, 0, 0 },
FfrqFV= { SCF_integer, 16, 39, 0, &freqF, 8, 0, 1 },
FfrqTV= { SCF_integer, 16, 56, 0, &freqT, 8, 0, 2 },
FfrqCV= { SCF_integer, 17, 39, 0, &freqC, 8, 0, 3 },
FfdevV= { SCF_integer, 17, 56, 0, &frdev, 8, 0, 4 },
Fgn2P= { SCF_string, 16, 40, 0, Mgain, 10, 0, 0 },
Fgn2V= { SCF_integer, 16, 50, 0, &Gain2, 6, 0, 3 };
struct SCField
*CHhdrs[]= { &Fchan1, &Fwav1P, &FfreqP,
&Fchan2, &Fwav2P, &Ffrq1P, &Ffrq2P,
/* &Fgn2P, */
NULL },
*CHvals[]= { &Fwav1V, &FfreqV,
&Fwav2V, &FfrqFV, &FfrqTV, &FfrqCV, &FfdevV,
/* &Fgn2V, */
NULL },
*scrP[]= { &FsamP, &FinfoP, &FinfoP2, &Finfo, &Finfo2,
&Ffrag, &Ffragtim, &Ftime, NULL, },
*scrV[]= { &FsamV, &Fbits, &Fchans, &FNfrag, NULL };
/* Help strings for second info line.
*/
char Hwav[]="DOWN ARROW (or SPACE) & UP ARROW to select WaveForm",
Hnum[]="Enter Digits, DEL or <- to delete, LEFT/RIGHT move digits, UP/DOWN Inc/Dec",
Hbits[]="Press <SPACE> to toggle 8 / 16 bit setting",
Hchan[]="Press <SPACE> to toggle Mono / Stereo setting";
char *Hvals[]={ Hwav, Hnum,
Hwav, Hnum, Hnum, Hnum, Hnum, NULL };
char *Hset[]= { Hnum, Hbits, Hchan, Hnum, NULL };
/* waveform name and buffer array.......
*/
char **WAVEFORMS=NULL;
int **wavbufs=NULL;
/* WinGen() The main interactive screen
*/
WinGen(fd)
int fd;
{
int c,i,n,st,t;
unsigned int j,k;
int f,wavef,card;
char **hh;
struct SCField **ff;
if (n=WinGenInit()) return(n);
hh=Hvals; ff=CHvals;
doinfo(Mmain,0,&Finfo2);
wavef=card=f=0;
dispfield(ff,hh,&Finfo,f);
refresh();
t=time(NULL);
for (;;) {
if ((i=time(NULL))-t) { t=i; dotime(&Ftime); }
if (playsamples(fd)<0) {
move(COLS-1,0); endwin();
return(err_rpt(errno,"Problem generating output samples."));
}
if ((c=getch())==-1) {
delay(25000);
continue;
}
if (c=='s' || c=='S') {
if (card) {
/* check if card params have changed - if so close and reopen */
Lafmt=(Fbits.adj)?AFMT_S16_LE:AFMT_U8;
Lstereo=Fchans.adj;
if ((Lsamplerate!=samplerate) || (Lafmt!=afmt) || (Lstereo!=stereo) || (LNfb!=Nfragbufs)) {
close(fd);
if ((fd=DACopen(dac,"w",&Lsamplerate,&Lafmt,&Lstereo))<0 ||
(fragsize=setfragsize(fd,LNfb,Bufspersec,Lsamplerate,Lafmt,Lstereo))<0) {
move(COLS-1,0); endwin();
return(err_rpt(errno,dac));
}
fragsamplesize=(fragsize>>(Lafmt==AFMT_S16_LE))>>(Lstereo);
fragtim=fragsamplesize*1000000/Lsamplerate;
putfield(&Ffrag); putfield(&Ffragtim);
}
dofields(scrV);
/* if samplerate or format has changed, re-generate waveforms */
/* we generate 16 bit samples cos we need it for sweeping freq */
/* then we adjust if we are writing 8 bit samples */
if ((Lsamplerate!=samplerate) || (Lafmt!=afmt)) {
if (st=genAllWaveforms(&WAVEFORMS,&wavbufs,1,Lsamplerate*resolution,AFMT_S16_LE)) {
move(COLS-1,0); endwin();
return(err_rpt(st,"Problem generating Base waveforms."));
}
}
samplerate=Lsamplerate; afmt=Lafmt; stereo=Lstereo; Nfragbufs=LNfb;
playsamples(-1); /* resync left and right channels */
dispfield(ff,hh,&Finfo,f);
card=0; f=wavef;
ff=CHvals; hh=Hvals;
doinfo(Mmain,0,&Finfo2);
} else { /* enter card setting alteration stuff */
dispfield(ff,hh,&Finfo,f);
card=1; wavef=f;
ff=scrV; hh=Hset;
f=next_field(ff,-1);
doinfo(Mcard,0,&Finfo2);
}
dispfield(ff,hh,&Finfo,f);
continue;
}
if (c=='q' || c=='Q') {
move(COLS-1,0); endwin();
return(c);
}
f=doinput(c,ff,hh,&Finfo,f);
if (i=(ff[f]->id)) {
if (i<=2) {
freqC=(freqF+freqT+1)/2;
frdev=((freqT>freqF)?freqT:freqF)-freqC;
} else {
if ((i==3) && (freqC<frdev)) freqC=frdev;
else if ((i==4) && (freqC<frdev)) frdev=freqC;
if (freqF<freqT) {
freqF=freqC-frdev; freqT=freqC+frdev;
} else {
freqT=freqC-frdev; freqF=freqC+frdev;
}
}
putfield(&FfrqCV); putfield(&FfdevV);
putfield(&FfrqTV); putfield(&FfrqFV);
putfield(ff[f]);
}
}
}
WinGenInit()
{
int att_h1,att_h2,att_h3,att_h4,att_h5,att_h6;
int n,i;
Lsamplerate=samplerate; /* set local working copy of samplerate */
Lafmt=afmt; Lstereo=stereo;
LNfb=Nfragbufs;
Fbits.adj=(afmt==16);
Fchans.adj=stereo;
fragtim=fragsamplesize*1000000/samplerate;
if (n=genAllWaveforms(&WAVEFORMS,&wavbufs,1,samplerate*resolution,afmt)) {
return(err_rpt(n,"Problem generating Base waveforms."));
}
Fwav1V.val.sp=WAVEFORMS; Fwav2V.val.sp=WAVEFORMS;
setwaveform(&Fwav1V,wf,WAVEFORMS);
setwaveform(&Fwav2V,wf2,WAVEFORMS);
n=0; /* setup the correct number of Decimal points depending on resolution */
if (resolution==10) n=1;
else if (resolution==100) n=2;
FfreqV.dp=FfrqFV.dp=FfrqTV.dp=FfrqCV.dp=FfdevV.dp=n;
freq*=resolution; freqT*=resolution;
freqC*=resolution; freqF*=resolution; frdev*=resolution;
tzset(); /* set timezone stuff up for dotime() function */
if (vflg) { /* ========= if vflg pause before going into ncurses =======*/
printf("\n<Press Return to Continue>\n");
getchar();
}
initscr();
cbreak(); noecho();
nonl(); intrflush(stdscr,FALSE); keypad(stdscr,TRUE);
nodelay(stdscr,TRUE);
timeout(KEY_DELAY);
if (has_colors()) {
start_color();
ColorPair1;
ColorPair2;
ColorPair3;
ColorPair4;
ColorPair5;
ColorPair6;
att_h1=COLOR_PAIR(1);
att_h2=COLOR_PAIR(2)+A_BOLD;
att_h3=COLOR_PAIR(3);
att_h4=COLOR_PAIR(4);
att_h5=COLOR_PAIR(5);
att_h6=COLOR_PAIR(6);
} else {
att_h1=A_REVERSE; att_h5=att_h6=att_h2=att_h4=A_BOLD;
att_h3=A_NORMAL;
}
dofatt(scrV,att_h4); dofatt(scrP,att_h3);
Ffrag.attr=Ffragtim.attr=att_h4;
dofatt(CHhdrs,att_h5);
dofatt(CHvals,att_h6);
sprintf(VERS,VERSTR,sys,VERSION);
dohdr(0,att_h1,att_h2,att_h3,hl,oh,sig,VERS);
for (i=FsamP.row; i<Finfo2.row; i++) {
mvputfstr(i,0,att_h5,"",80);
}
dofields(scrP); dofields(scrV);
dofields(CHhdrs);
dofields(CHvals);
refresh();
}
/* playsamples(fd) check state of output sound buffers, if necessary
* generate next fragment of samples and write it away.
* if fd < 0 then the offset pointers are resynched by setting to zero.
*/
playsamples(fd)
int fd;
{
static int fr_size=0;
static unsigned char *frag=NULL;
static int of1,of2; /* of1 for the sweeping, of2 for swept frequencies */
short int v,*vp,*wv1,*wv2;
unsigned char *p;
int i,n,t1,t2,dev;
if (fd<0) { of2=0; return(of1=0); } /* reset pointers */
if (fragsize!=fr_size) {
if (fr_size) free(frag);
if ((frag=malloc(fragsize))==NULL) return(-1);
fr_size=fragsize; of1=0; of2=0;
}
#define TO8BIT(V) (unsigned char)((V>>8)+128)
/* (afmt==AFMT_S16_LE) */
/* It's all done in signed 16 bit format - because we need the
* precision for the sweeping waveform. We adjust down to 8 bit
* if writing 8 bit samples on output.
*/
dev=(freqF<freqT)?frdev:-frdev;
for (;;) {
if ((i=getfreeobufs(fd))<=0) return(i);
wv1=(short int *)(wavbufs[Fwav1V.adj]); /* sweeping waveform */
wv2=(short int *)(wavbufs[Fwav2V.adj]); /* swept waveform */
for (i=0, vp=(short int *)(p=frag); i<fragsamplesize; i++) {
t1=(int)(wv1[of1]);
if (stereo) {
if (afmt==AFMT_S16_LE) *vp++=wv1[of1]; else *p++=TO8BIT(wv1[of1]);
}
of1=(of1+freq)%(samplerate*resolution);
if (afmt==AFMT_S16_LE) *vp++=wv2[of2]; else *p++=TO8BIT(wv2[of2]);
of2=((int)(samplerate*resolution)+of2+(int)freqC+((t1*dev)/32768))%(samplerate*resolution);
}
if (write(fd,frag,fragsize)<0) return(-1);
}
return(0);
}