ref: 281c596acf4eebc74340596481e5d1e8f84f18f1
dir: /draw.c/
#include <u.h>
#include <libc.h>
#include <thread.h>
#include <draw.h>
#include "dat.h"
#include "fns.h"
QLock lsync;
int debugdraw = 1;
enum{
Cbg,
Csamp,
Cline,
Cins,
Cloop,
Cchunk,
Ctext,
Ncol,
};
static Image *col[Ncol];
static Image *view;
static Rectangle statr;
static usize views, viewe, viewmax, linepos;
static int bgscalyl, bgscalyr;
static double bgscalf;
static Channel *drawc, *sampc;
static usize T;
static int sampwidth = 1; /* pixels per sample */
static double zoom = 1.0;
static int stalerender, tworking;
static int working;
static vlong slen;
static s16int *graph[2];
#define Rrate (1000.0 / 60.0)
static Image *
eallocimage(Rectangle r, int repl, ulong col)
{
Image *i;
if((i = allocimage(display, r, screen->chan, repl, col)) == nil)
sysfatal("allocimage: %r");
return i;
}
vlong
ss2view(int x)
{
return (x - views) / (T * sampwidth);
}
vlong
view2ss(int x)
{
return views + x * T * sampwidth & ~3;
}
static void
b2t(usize off, int *th, int *tm, int *ts, int *tμ)
{
usize nsamp;
nsamp = off / Sampsz;
*ts = nsamp / Rate;
*tm = *ts / 60;
*th = *tm / 60;
*tμ = 100 * (nsamp - *ts * Rate) / Rate;
*ts %= 60;
*tm %= 60;
}
int
τfmt(Fmt *fmt)
{
int th, tm, ts, tμ;
usize p;
p = va_arg(fmt->args, usize);
if(p > dot.totalsz)
return fmtstrcpy(fmt, "-∞");
b2t(p, &th, &tm, &ts, &tμ);
return fmtprint(fmt, "%02d:%02d:%02d.%03d (%zd)",
th, tm, ts, tμ, p / Sampsz);
}
static int
renderpos(usize ss, Image *c, int justdraw)
{
Rectangle r;
if(ss <= views || ss >= viewe)
return 0;
r = view->r;
r.min.x = ss2view(ss);
r.max.x = r.min.x + 1;
if(justdraw){
r = rectaddpt(r, screen->r.min);
draw(screen, r, c, nil, ZP);
}else
draw(view, r, c, nil, ZP);
return 1;
}
static void
renderchunks(void)
{
usize p, off;
Chunk *c;
c = p2c(views, &off, &dot);
for(p=views-off; p<viewe; p+=c->len, c=c->right){
if(p == 0)
continue;
renderpos(p, col[Cchunk], 0);
}
}
static void
rendermarks(void)
{
if(debugdraw)
renderchunks();
renderpos(dot.from, col[Cloop], 0);
renderpos(dot.to, col[Cloop], 0);
if(dot.off != dot.from)
renderpos(dot.off, col[Cins], 0);
}
static void
rendersamples(void)
{
s16int *l, *e, *r;
Rectangle rx, rr;
if(slen == 0)
return;
rr = view->r;
draw(view, rr, col[Cbg], nil, ZP);
if(Dx(rr) > slen / 2)
rr.max.x = rr.min.x + slen / 2;
rx = rr;
for(l=graph[0]+2*rx.min.x, e=l+2*Dx(rr); l<e; l+=2, rx.min.x++){
rx.min.y = rr.min.y + bgscalyl - l[1] / bgscalf;
rx.max.x = rx.min.x + sampwidth;
rx.max.y = rr.min.y + bgscalyl - l[0] / bgscalf;
draw(view, rx, col[Csamp], nil, ZP);
}
if(!stereo)
return;
/*
FIXME: wrong midpoint.
rendersamples 0x410450 [0 0] [1365 187] view [0 0] [1365 375]→ [187 0] [1552 187]
*/
rx = rectaddpt(rr, Pt(Dy(view->r)/2,0));
//fprint(2, "→ %R\n", rx);
for(r=graph[1]+2*rx.min.x, e=r+2*Dx(rr); r<e; r+=2, rx.min.x++){
rx.min.y = rr.min.y + bgscalyr - r[1] / bgscalf;
rx.max.x = rx.min.x + sampwidth;
rx.max.y = rr.min.y + bgscalyr - r[0] / bgscalf;
draw(view, rx, col[Csamp], nil, ZP);
}
}
static void
render(void)
{
rendersamples();
rendermarks();
}
static void
erasemark(usize ss)
{
Rectangle r;
ss = ss2view(ss);
r = view->r;
r.min.x = ss;
r.max.x = r.min.x + 1;
r = rectaddpt(r, screen->r.min);
draw(screen, r, view, nil, subpt(r.min, screen->r.min));
}
static void
drawstat(void)
{
char s[256];
Point p;
draw(screen, statr, col[Cbg], nil, ZP);
seprint(s, s+sizeof s, "T %zd @ %τ", T / Sampsz, dot.cur);
p = string(screen, statr.min, col[Ctext], ZP, font, s);
if(dot.from > 0 || dot.to < dot.totalsz){
seprint(s, s+sizeof s, " ↺ %τ - %τ", dot.from, dot.to);
p = string(screen, p, col[Cloop], ZP, font, s);
}
if(dot.off != dot.from){
seprint(s, s+sizeof s, " ‡ %τ", dot.off);
p = string(screen, p, col[Cins], ZP, font, s);
}
statr.max.x = p.x;
}
static void
drawproc(void*)
{
int what;
long Δt;
double t0, t;
threadsetname("drawer");
t0 = nsec() / 1000000.0 + Rrate;
for(;;){
what = Drawrender;
if(nbrecv(drawc, &what) < 0){
fprint(2, "drawproc: %r\n");
break;
}
lockdisplay(display);
if(what == Drawrender || stalerender || working){
if(!working)
stalerender = 0;
render();
draw(screen, rectaddpt(view->r, screen->r.min), view, nil, ZP);
}else
erasemark(linepos);
renderpos(dot.cur, col[Cline], 1);
linepos = dot.cur;
drawstat();
flushimage(display, 1);
unlockdisplay(display);
t = nsec() / 1000000.0;
Δt = t0 - t;
if(Δt > 0)
sleep(Δt);
else{
Δt = -Δt;
t0 += Δt - Δt % (long)Rrate;
}
t0 += Rrate;
}
}
/* throttling of draw requests happens here */
void
refresh(int what)
{
static int f;
f |= what;
if(nbsend(drawc, &f) != 0)
f = 0;
}
static void
sampler(void *)
{
int n, lmin, lmax, rmin, rmax;
usize k;
uchar *p, *e;
s16int s, *l, *r, *le;
vlong N;
Dot d;
again:
if(recv(sampc, &d) < 0)
threadexits("recv: %r");
tworking = ++working;
stalerender++;
N = (d.to - d.from) / (T * sampwidth);
if(slen < 2*N){ /* min, max */
graph[0] = erealloc(graph[0],
2*N * sizeof *graph[0],
slen * sizeof *graph[0]);
graph[1] = erealloc(graph[1],
2*N * sizeof *graph[1],
slen * sizeof *graph[1]);
}
slen = 2*N;
l = graph[0];
r = graph[1];
le = l + slen;
while(l < le){
if(sampc->n > 0) /* start over */
break;
n = T * sampwidth;
lmin = lmax = rmin = rmax = 0;
while(n > 0){
if((p = getslice(&d, n, &k)) == nil){
if(k > 0)
fprint(2, "getslice: %r\n");
l = le;
break;
}
d.cur += k;
for(e=p+k; p<e; p+=Sampsz*sampwidth){
s = (s16int)(p[1] << 8 | p[0]);
if(s < lmin)
lmin = s;
else if(s > lmax)
lmax = s;
if(stereo){
s = (s16int)(p[3] << 8 | p[2]);
if(s < rmin)
rmin = s;
else if(s > rmax)
rmax = s;
}
}
n -= k;
}
*l++ = lmin;
*l++ = lmax;
if(stereo){
*r++ = rmin;
*r++ = rmax;
}
}
working--;
refresh(Drawrender);
goto again;
}
static void
resetdraw(void)
{
Rectangle viewr;
viewr = rectsubpt(screen->r, screen->r.min);
statr = screen->r;
if(stereo){
statr.min.y += (Dy(screen->r) - font->height) / 2 + 1;
statr.max.y = statr.min.y + font->height;
}else
statr.min.y = screen->r.max.y - font->height;
freeimage(view);
view = eallocimage(viewr, 0, DNofill);
bgscalyl = (viewr.max.y - font->height) / (1 * (stereo ? 4 : 2));
bgscalyr = viewr.max.y - bgscalyl;
bgscalf = 32767. / bgscalyl;
}
void
redraw(int all)
{
usize span;
Dot d;
lockdisplay(display);
T = (vlong)(dot.totalsz / zoom / Dx(screen->r)) & ~3;
if(T < Sampsz)
T = Sampsz;
span = Dx(screen->r) * T;
viewmax = dot.totalsz - span;
if(views > viewmax)
views = viewmax;
viewe = views + span;
if(all)
resetdraw();
unlockdisplay(display);
if(paused)
refresh(Drawall);
d = dot;
d.from = d.cur = views;
d.to = viewe;
nbsend(sampc, &d);
}
void
setzoom(int Δz, int mul)
{
double z;
if(!mul)
z = zoom + Δz;
else if(Δz < 0)
z = zoom / pow(2, -Δz);
else
z = zoom * pow(2, Δz);
if(z < 1.0 || z > (dot.totalsz / Sampsz) / Dx(screen->r))
return;
zoom = z;
redraw(0);
}
int
zoominto(vlong from, vlong to)
{
if(from < 0)
from = 0;
from &= ~3;
if(to >= dot.totalsz)
to = dot.totalsz;
to &= ~3;
if((to - from) / Sampsz < Dx(screen->r)){
werrstr("range too small");
return -1;
}
views = from;
viewe = to;
zoom = (double)dot.totalsz / (to - from);
redraw(0);
return 0;
}
void
setpan(int Δx)
{
usize new;
Δx *= T;
if(zoom == 1)
return;
if(Δx < 0 && -Δx > views)
new = 0;
else if(views + Δx >= viewmax)
new = viewmax;
else
new = views + Δx;
if(new == views)
return;
views = new;
redraw(0);
}
void
setpage(int d)
{
setpan(d * (Dx(view->r) + 1));
}
void
setrange(usize from, usize to)
{
from &= ~3;
to &= ~3;
dot.from = from;
dot.to = to;
if(dot.cur < from || dot.cur >= to)
dot.cur = from;
dot.off = -1;
stalerender = 1;
refresh(Drawrender);
}
int
setjump(vlong off)
{
off &= ~3;
if(off < dot.from || off > dot.to - Sampsz){
werrstr("cannot jump outside of loop bounds");
return -1;
}
dot.off = dot.cur = off;
stalerender = 1;
refresh(Drawrender);
return 0;
}
int
setloop(vlong off)
{
off &= ~3;
if(off < 0 || off > dot.totalsz){
werrstr("invalid range");
return -1;
}
if(off < dot.cur)
setrange(off, dot.to);
else
setrange(dot.from, off);
return 0;
}
void
initdrw(int fuckit)
{
if(initdraw(nil, nil, "pplay") < 0)
sysfatal("initdraw: %r");
display->locking = 1;
unlockdisplay(display);
if(!fuckit){
col[Cbg] = eallocimage(Rect(0,0,1,1), 1, 0xFFFFC0FF);
col[Csamp] = eallocimage(Rect(0,0,1,1), 1, 0x3F3F20FF);
col[Ctext] = display->black;
col[Cline] = eallocimage(Rect(0,0,1,1), 1, DBlue);
col[Cins] = eallocimage(Rect(0,0,1,1), 1, DPaleblue);
col[Cloop] = eallocimage(Rect(0,0,1,1), 1, DBluegreen);
col[Cchunk] = eallocimage(Rect(0,0,1,1), 1, DRed);
}else{
col[Cbg] = display->black;
col[Csamp] = eallocimage(Rect(0,0,1,1), 1, 0x2A2A2AFF);
col[Ctext] = eallocimage(Rect(0,0,1,1), 1, 0xBBBBBBFF);
col[Cline] = eallocimage(Rect(0,0,1,1), 1, 0xEEA000FF);
col[Cins] = eallocimage(Rect(0,0,1,1), 1, 0x509A9AFF);
col[Cloop] = eallocimage(Rect(0,0,1,1), 1, 0x8888CCFF);
col[Cchunk] = eallocimage(Rect(0,0,1,1), 1, 0xEE0000FF);
}
if((drawc = chancreate(sizeof(int), 0)) == nil
|| (sampc = chancreate(sizeof(Dot), 2)) == nil)
sysfatal("chancreate: %r");
redraw(1);
if(proccreate(sampler, nil, mainstacksize) < 0
|| proccreate(drawproc, nil, mainstacksize) < 0)
sysfatal("proccreate: %r");
}