ref: c923daa68daae862ccdd638cbb9e255c609b09de
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;
enum{
Cbg,
Csamp,
Cline,
Cins,
Cloop,
Cchunk,
Ctext,
Ncol,
};
static Image *col[Ncol];
static Image *view;
static Rectangle liner, statr;
static usize views, viewe, viewmax;
static int bgscalyl, bgscalyr;
static double bgscalf;
static Channel *drawc;
static usize T;
static int sampwidth = 1;
static double zoom = 1.0;
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;
}
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 > current->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
drawpos(usize pos, Image *c)
{
Rectangle r;
if(pos <= views || pos >= viewe)
return 0;
r = screen->r;
r.min.x += (pos - views) / T;
r.max.x = r.min.x + 1;
draw(screen, r, c, nil, subpt(r.min, screen->r.min));
return 1;
}
static void
drawchunks(void)
{
usize p, off;
Chunk *c;
c = p2c(views, &off, current);
for(p=views-off; p<viewe; p+=c->len, c=c->right){
if(p == 0)
continue;
drawpos(p, col[Cchunk]);
}
}
static void
drawsamps(void*)
{
int ox, n, lmin, lmax, rmin, rmax;
usize m, k;
s16int s;
double x;
uchar *p, *e;
Rectangle l, r;
Point range;
Dot d;
for(;;){
end:
if(recv(drawc, &range) < 0)
break;
again:
r = view->r;
r.min.x = (range.x - views) / T;
r.max.x = (range.y - views) / T;
lockdisplay(display);
draw(view, r, col[Cbg], nil, ZP);
unlockdisplay(display);
d = *current;
d.from = range.x;
d.cur = d.from;
d.to = range.y;
m = d.to - d.from;
ox = 0;
x = 0.0;
qlock(&lsync);
while(m > 0){
if((n = nbrecv(drawc, &range)) < 0)
return;
else if(n == 1){
qunlock(&lsync);
goto again;
}
n = m < T * sampwidth ? m : T * sampwidth;
lmin = lmax = 0;
rmin = rmax = 0;
while(n > 0){
if((p = getslice(&d, n, &k)) == nil){
if(k > 0)
fprint(2, "getslice: %r\n");
goto end;
}
d.cur += k;
e = p + k;
while(p < e){
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;
}
p += 4 * sampwidth;
}
n -= k;
m -= k;
}
l = Rect(x, bgscalyl - lmax / bgscalf,
x+sampwidth, bgscalyl - lmin / bgscalf);
lockdisplay(display);
draw(view, l, col[Csamp], nil, ZP);
if(stereo){
r = Rect(x, bgscalyr - rmax / bgscalf,
x+sampwidth, bgscalyr - rmin / bgscalf);
draw(view, r, col[Csamp], nil, ZP);
}
unlockdisplay(display);
if(x - ox >= 1600){
update(ox, x);
ox = x;
}
x += k / T;
}
update(ox, Dx(screen->r));
qunlock(&lsync);
}
}
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, current->cur);
p = string(screen, statr.min, col[Ctext], ZP, font, s);
if(current->from > 0 || current->to < current->totalsz){
seprint(s, s+sizeof s, " ↺ %τ - %τ", current->from, current->to);
p = string(screen, p, col[Cloop], ZP, font, s);
}
if(current->off != current->from){
seprint(s, s+sizeof s, " ‡ %τ", current->off);
p = string(screen, p, col[Cins], ZP, font, s);
}
statr.max.x = p.x;
}
static void
drawmarks(void)
{
if(debugdraw)
drawchunks();
drawpos(current->from, col[Cloop]);
drawpos(current->to, col[Cloop]);
if(current->off != current->from)
drawpos(current->from, col[Cins]);
}
void
update(int x, int x´)
{
Rectangle r;
r = liner;
lockdisplay(display);
draw(screen, liner, view, nil, subpt(r.min, screen->r.min));
if(x < x´){
r.min.x = screen->r.min.x + x;
r.max.x = screen->r.min.x + x´;
draw(screen, r, view, nil, subpt(r.min, screen->r.min));
}
liner.min.x = screen->r.min.x + (current->cur - views) / T;
liner.max.x = liner.min.x + 1;
drawpos(current->cur, col[Cline]);
drawmarks();
drawstat();
flushimage(display, 1);
unlockdisplay(display);
}
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 > (current->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 >= current->totalsz)
to = current->totalsz;
to &= ~3;
if((to - from) / Sampsz < Dx(screen->r)){
werrstr("range too small");
return -1;
}
views = from;
viewe = to;
zoom = (double)current->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)
{
assert((from & 3) == 0);
assert((to & 3) == 0);
if(current->from > views)
drawpos(current->from, view);
if(current->to < viewe)
drawpos(current->to, view);
current->from = from;
current->to = to;
if(current->cur < from || current->cur >= to)
current->cur = from;
current->off = -1ULL;
}
static int
setcur(usize off)
{
if(off < current->from || off > current->to - Outsz){
werrstr("cannot jump outside of loop bounds\n");
return -1;
}
current->off = current->cur = off;
if(paused)
update(0, 0);
return 0;
}
void
setloop(vlong off)
{
off *= T;
off += views;
if(off < 0 || off > current->totalsz)
return;
if(off < current->cur)
setrange(off, current->to);
else
setrange(current->from, off);
if(paused)
update(0, 0);
}
void
setjump(usize off)
{
setcur(off);
}
void
setofs(usize ofs)
{
setcur(views + ofs * T);
}
static void
resetdraw(void)
{
int x;
Rectangle viewr;
x = screen->r.min.x + (current->cur - views) / T;
viewr = rectsubpt(screen->r, screen->r.min);
statr = screen->r;
if(stereo)
statr.min.y += (Dy(screen->r) - font->height) / 2 + 1;
else
statr.min.y = screen->r.max.y - font->height;
freeimage(view);
view = eallocimage(viewr, 0, DNofill);
liner = screen->r;
liner.min.x = x;
liner.max.x = x + 1;
bgscalyl = (viewr.max.y - font->height) / (stereo ? 4 : 2);
bgscalyr = viewr.max.y - bgscalyl;
bgscalf = 32767. / bgscalyl;
}
void
redraw(int all)
{
usize span;
Point p;
lockdisplay(display);
T = (vlong)(current->totalsz / zoom / Dx(screen->r)) & ~3;
if(T == 0)
T = 4;
span = Dx(screen->r) * T;
viewmax = current->totalsz - span;
if(views > viewmax)
views = viewmax;
viewe = views + span;
if(all)
resetdraw();
unlockdisplay(display);
p = Pt(views, viewe);
nbsend(drawc, &p);
}
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, 0xFF2222FF);
col[Cins] = eallocimage(Rect(0,0,1,1), 1, DBlue);
col[Cloop] = eallocimage(Rect(0,0,1,1), 1, 0xDD00DDFF);
col[Cchunk] = eallocimage(Rect(0,0,1,1), 1, DPaleyellow);
}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(Point), 4)) == nil)
sysfatal("chancreate: %r");
if(proccreate(drawsamps, nil, mainstacksize) < 0)
sysfatal("proccreate: %r");
redraw(1);
}