ref: d4973711223b25f7d2e70d2739c81257e28f3a14
dir: fplay/fplay.c
#include <u.h>
#include <libc.h>
#include <thread.h>
#include <draw.h>
#include <mouse.h>
#include <keyboard.h>
#include "dat.h"
#include "fns.h"
/* FIXME: labeled axes */
/* FIXME: midi y scale */
/* FIXME: optimization: stereo s16int fft (real integral 16-bit fft) */
enum{
Rate = 44100,
Ndelay = Rate / 25,
Nchunk = Ndelay * 4,
Csamp = 0,
Cft,
Cline,
Cloop,
Ncol
};
int cat;
int T, stereo, scale = 1;
Rectangle liner;
Point pan, statp;
double freq[128];
int nfft = 1<<10;
int *fftb;
ulong nbuf;
uchar *buf, *bufp, *bufe, *viewp, *viewe, *viewmax, *loops, *loope;
Image *viewbg, *view, *col[Ncol];
Keyboardctl *kc;
Mousectl *mc;
QLock lck;
u32int cmapa[] = {
0x000000ff, 0x000003ff, 0x000005ff, 0x000008ff, 0x00000bff, 0x00000dff,
0x000010ff, 0x000013ff, 0x000015ff, 0x000018ff, 0x00001bff, 0x00001dff,
0x000020ff, 0x000022ff, 0x000025ff, 0x000027ff, 0x00002aff, 0x00002cff,
0x00002fff, 0x000031ff, 0x000034ff, 0x000036ff, 0x000039ff, 0x00003bff,
0x00003dff, 0x000040ff, 0x000042ff, 0x000044ff, 0x000047ff, 0x000049ff,
0x00004bff, 0x00004dff, 0x00004fff, 0x010051ff, 0x040053ff, 0x070055ff,
0x090057ff, 0x0c0059ff, 0x0f005bff, 0x11005dff, 0x14005fff, 0x170061ff,
0x190062ff, 0x1c0064ff, 0x1f0066ff, 0x210067ff, 0x240069ff, 0x27006aff,
0x29006cff, 0x2c006dff, 0x2e006eff, 0x310070ff, 0x340071ff, 0x360072ff,
0x390073ff, 0x3c0074ff, 0x3e0076ff, 0x410077ff, 0x430078ff, 0x460078ff,
0x480079ff, 0x4b007aff, 0x4e007bff, 0x50007bff, 0x53007cff, 0x55007dff,
0x58007dff, 0x5a007eff, 0x5d007eff, 0x5f007eff, 0x62007fff, 0x64007fff,
0x66007fff, 0x69007fff, 0x6b007fff, 0x6e0080ff, 0x70007fff, 0x73007fff,
0x75007fff, 0x77007fff, 0x7a007fff, 0x7c007eff, 0x7e007eff, 0x81007eff,
0x83007dff, 0x85007dff, 0x88007cff, 0x8a007bff, 0x8c007bff, 0x8e007aff,
0x900079ff, 0x930078ff, 0x950078ff, 0x970077ff, 0x990076ff, 0x9b0074ff,
0x9d0073ff, 0x9f0072ff, 0xa20071ff, 0xa40070ff, 0xa6006eff, 0xa8006dff,
0xaa006cff, 0xac006aff, 0xae0069ff, 0xb00067ff, 0xb10066ff, 0xb30064ff,
0xb50062ff, 0xb70061ff, 0xb9005fff, 0xbb005dff, 0xbd005bff, 0xbe0059ff,
0xc00057ff, 0xc20055ff, 0xc40053ff, 0xc50051ff, 0xc7004fff, 0xc9004dff,
0xca004bff, 0xcc0049ff, 0xce0047ff, 0xcf0044ff, 0xd10042ff, 0xd20040ff,
0xd4003dff, 0xd5003bff, 0xd70039ff, 0xd80036ff, 0xd90034ff, 0xdb0031ff,
0xdc002fff, 0xde002cff, 0xdf002aff, 0xe00027ff, 0xe10025ff, 0xe30022ff,
0xe40020ff, 0xe5001dff, 0xe6001bff, 0xe70018ff, 0xe80015ff, 0xe90013ff,
0xeb0010ff, 0xec000dff, 0xed000bff, 0xee0008ff, 0xef0003ff, 0xef0005ff,
0xf00000ff, 0xf10500ff, 0xf20a00ff, 0xf30f00ff, 0xf41500ff, 0xf41a00ff,
0xf51f00ff, 0xf62400ff, 0xf72900ff, 0xf72e00ff, 0xf83300ff, 0xf93800ff,
0xf93d00ff, 0xfa4200ff, 0xfa4700ff, 0xfb4c00ff, 0xfb5100ff, 0xfc5600ff,
0xfc5b00ff, 0xfc6000ff, 0xfd6500ff, 0xfd6900ff, 0xfd6e00ff, 0xfe7300ff,
0xfe7700ff, 0xfe7c00ff, 0xfe8000ff, 0xff8500ff, 0xff8900ff, 0xff8d00ff,
0xff9200ff, 0xff9600ff, 0xff9a00ff, 0xff9e00ff, 0xffa200ff, 0xffa600ff,
0xffaa00ff, 0xffae00ff, 0xffb200ff, 0xffb500ff, 0xffb900ff, 0xffbc00ff,
0xffc000ff, 0xffc300ff, 0xffc600ff, 0xffca00ff, 0xffcd05ff, 0xffd009ff,
0xffd30eff, 0xffd613ff, 0xffd817ff, 0xffdb1cff, 0xffde20ff, 0xffe025ff,
0xffe32aff, 0xffe52eff, 0xffe733ff, 0xffe938ff, 0xffeb3cff, 0xffed41ff,
0xffef46ff, 0xfff14aff, 0xfff34fff, 0xfff453ff, 0xfff658ff, 0xfff75dff,
0xfff861ff, 0xfff966ff, 0xfffa6bff, 0xfffb6fff, 0xfffc74ff, 0xfffd79ff,
0xfffd7dff, 0xfffe82ff, 0xfffe86ff, 0xffff8bff, 0xffff90ff, 0xffff94ff,
0xffff99ff, 0xffff9eff, 0xffffa2ff, 0xffffa7ff, 0xffffacff, 0xffffb0ff,
0xffffb5ff, 0xffffb9ff, 0xffffbeff, 0xffffc3ff, 0xffffc7ff, 0xffffccff,
0xffffd1ff, 0xffffd5ff, 0xffffdaff, 0xffffdfff, 0xffffe3ff, 0xffffe8ff,
0xffffecff, 0xfffff1ff, 0xfffff6ff, 0xfffffaff, 0xffffffff, 0xffffffff,
0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff
};
Image *cmap[nelem(cmapa)];
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;
}
void
drawstat(void)
{
char s[64];
snprint(s, sizeof s, "T %d p %zd", T, bufp-buf);
string(screen, statp, col[Cline], ZP, font, s);
}
void
update(void)
{
int x;
x = screen->r.min.x + (bufp - viewp) / T;
if(liner.min.x == x || bufp < viewp && x > liner.min.x)
return;
draw(screen, screen->r, view, nil, ZP);
liner.min.x = x;
liner.max.x = x + 1;
if(bufp >= viewp)
draw(screen, liner, col[Cline], nil, ZP);
drawstat();
flushimage(display, 1);
}
void
athread(void *)
{
int n, fd;
if((fd = cat ? 1 : open("/dev/audio", OWRITE)) < 0)
sysfatal("open: %r");
for(;;){
qlock(&lck);
n = bufp + Nchunk >= loope ? loope - bufp : Nchunk;
if(write(fd, bufp, n) != n)
break;
bufp += n;
if(bufp >= loope)
bufp = loops;
update();
qunlock(&lck);
yield();
}
close(fd);
}
void
dofft(void)
{
int n, *cp;
double *fp, *u, f;
uchar *p;
free(fftb);
if((fftb = mallocz(T * nfft/2 * sizeof *fftb, 1)) == nil)
sysfatal("mallocz: %r");
if((u = mallocz(nfft * sizeof *u, 1)) == nil)
sysfatal("mallocz: %r");
cp = fftb;
p = buf;
n = nfft;
while(p < bufe){
if(n > (bufe - p) / 4)
n = (bufe - p) / 4;
memset(u, 0, nfft * sizeof *u);
for(fp=u; fp<u+n; fp++, p+=4)
*fp = (s64int)(s16int)(p[1] << 8 | p[0]);
realft(u, nfft, 1);
for(fp=u; fp<u+nfft; fp+=2){
if(fp == u)
f = u[0];
else if(fp == u+nfft-2)
f = u[1];
else
f = sqrt(fp[0] * fp[0] + fp[1] * fp[1]);
if(f < 0.0)
f = -f;
f /= nfft;
f *= 2;
if(f != 0.0)
f = 20 * log10(f / 32768.);
else
f = -100;
if(f < -100.)
f = -100.;
else if(f > -20)
f = -20;
f += 100;
f *= 255. / 80;
*cp++ = f;
}
}
free(u);
}
void
drawfft(void)
{
int i, *cp;
Rectangle r, r2;
r = rectaddpt(viewbg->r, pan);
if(rectclip(&r, rectsubpt(screen->r, screen->r.min)) == 0)
return;
r2 = r;
if(r2.max.x > T)
r2.max.x = T;
if(r2.max.y > nfft>>1)
r2.max.y = nfft>>1;
while(r.min.x < r2.max.x){
r.max.x = r.min.x + scale;
r.min.y = r2.min.y;
cp = fftb + nfft/2*r.min.x + r.min.y;
while(r.min.y < r2.max.y){
r.max.y = r.min.y + scale;
assert(cp >= fftb);
assert(cp < fftb + T * nfft/2);
i = *cp++;
assert(i >= 0);
assert(i < 256);
draw(viewbg, r, cmap[i], nil, ZP);
r.min.y = r.max.y;
}
r.min.x = r.max.x;
}
}
void
drawview(void)
{
int x;
Rectangle r;
draw(view, view->r, display->black, nil, ZP);
draw(view, view->r, viewbg, nil, pan);
//draw(view, view->r, viewbg, nil, addpt(ZP, Δview));
if(loops != buf && loops >= viewp){
x = (loops - viewp) / T;
r = view->r;
r.min.x += x;
r.max.x = r.min.x + 1;
draw(view, r, col[Cloop], nil, ZP);
}
if(loope != bufe && loope >= viewp){
x = (loope - viewp) / T;
r = view->r;
r.min.x += x;
r.max.x = r.min.x + 1;
draw(view, r, col[Cloop], nil, ZP);
}
draw(screen, screen->r, view, nil, ZP);
draw(screen, liner, col[Cline], nil, ZP);
drawstat();
flushimage(display, 1);
}
enum{
Rall,
Rzoom,
Rpan,
};
void
redrawbg(int type)
{
int w, x;
Rectangle r, midr;
T = 1 + nbuf / scale / nfft;
w = Dx(screen->r) * T * 4;
viewmax = bufe - w;
if(viewp < buf)
viewp = buf;
else if(viewp > viewmax)
viewp = viewmax;
viewe = viewp + w;
x = screen->r.min.x + (bufp - viewp) / T;
liner = screen->r;
liner.min.x = x;
liner.max.x = x + 1;
if(type == Rpan)
goto end;
if(type == Rall){
dofft();
freeimage(view);
r = rectsubpt(screen->r, screen->r.min);
view = eallocimage(r, 0, DBlack);
}
freeimage(viewbg);
viewbg = eallocimage(rectsubpt(screen->r, screen->r.min), 0, DBlack);
if(type > Rall)
goto end;
if(stereo){
midr = r;
midr.min.y = midr.max.y / 2;
midr.max.y = midr.min.y + 1;
draw(viewbg, midr, col[Csamp], nil, ZP);
statp = Pt(screen->r.min.x,
screen->r.min.y + (Dy(screen->r) - font->height) / 2 + 1);
}else
statp = Pt(screen->r.min.x, screen->r.max.y - font->height);
end:
if(type <= Rzoom)
drawfft();
drawview();
}
void
writepcm(int pause)
{
int fd, n, sz;
char path[256];
uchar *p;
memset(path, 0, sizeof path);
if(!pause)
qlock(&lck);
n = enter("path:", path, sizeof(path)-UTFmax, mc, kc, nil);
if(!pause)
qunlock(&lck);
if(n < 0)
return;
if((fd = create(path, OWRITE, 0664)) < 0){
fprint(2, "create: %r\n");
return;
}
if((sz = iounit(fd)) == 0)
sz = 8192;
for(p=loops; p<loope; p+=sz){
n = loope - p < sz ? loope - p : sz;
if(write(fd, p, n) != n){
fprint(2, "write: %r\n");
goto end;
}
}
end:
close(fd);
}
void
setnfft(int n)
{
if(n < 1<<2 || n > 1<<26)
return;
nfft = n;
redrawbg(Rall);
}
void
setscale(int n)
{
if(n < 1 || n > 1<<30)
return;
scale = n;
redrawbg(Rzoom);
}
void
setpan(int dx, int dy)
{
Rectangle r;
r = rectaddpt(viewbg->r, pan);
if(dx > 0){
r.max.x = r.min.x + dx;
draw(screen, r, display->black, nil, ZP);
}else if(dx < 0){
r.min.x = r.max.x + dx;
draw(screen, r, display->black, nil, ZP);
}
r = rectaddpt(viewbg->r, pan);
if(dy > 0){
r.max.y = r.min.y + dy;
draw(screen, r, display->black, nil, ZP);
}else if(dy < 0){
r.min.y = r.max.y + dy;
draw(screen, r, display->black, nil, ZP);
}
pan.x += dx;
pan.y += dy;
redrawbg(Rpan);
}
void
setloop(void)
{
int n;
uchar *p;
n = (mc->xy.x - screen->r.min.x) * nfft * 4;
p = viewp + n;
if(p < buf || p > bufe)
return;
if(p < bufp)
loops = p;
else
loope = p;
drawview();
}
void
setpos(void)
{
int n;
uchar *p;
n = (mc->xy.x - screen->r.min.x) * nfft * 4;
p = viewp + n;
if(p < loops || p > loope - Nchunk)
return;
bufp = p;
update();
}
void
bufrealloc(ulong n)
{
int off;
off = bufp - buf;
if((buf = realloc(buf, n)) == nil)
sysfatal("realloc: %r");
bufe = buf + n;
bufp = buf + off;
}
void
usage(void)
{
fprint(2, "usage: %s [-cs] [pcm]\n", argv0);
threadexits("usage");
}
void
threadmain(int argc, char **argv)
{
int n, dx, dy, sz, fd, pause;
double f;
Mouse mo;
Rune r;
ARGBEGIN{
case 'c': cat = 1; break;
case 's': stereo = 1; break;
default: usage();
}ARGEND
if((fd = *argv != nil ? open(*argv, OREAD) : 0) < 0)
sysfatal("open: %r");
if(sz = iounit(fd), sz == 0)
sz = 8192;
bufrealloc(nbuf += 4*1024*1024);
while((n = read(fd, bufp, sz)) > 0){
bufp += n;
if(bufp + sz >= bufe)
bufrealloc(nbuf += 4*1024*1024);
}
if(n < 0)
sysfatal("read: %r");
close(fd);
bufrealloc(nbuf = bufp - buf);
nbuf /= 4;
bufp = buf;
if(initdraw(nil, nil, "fplay") < 0)
sysfatal("initdraw: %r");
if(kc = initkeyboard(nil), kc == nil)
sysfatal("initkeyboard: %r");
if(mc = initmouse(nil, screen), mc == nil)
sysfatal("initmouse: %r");
mo.xy = ZP;
col[Csamp] = eallocimage(Rect(0,0,1,1), 1, 0x440000FF);
col[Cft] = eallocimage(Rect(0,0,1,1), 1, 0x660000FF);
col[Cline] = eallocimage(Rect(0,0,1,1), 1, 0x884400FF);
col[Cloop] = eallocimage(Rect(0,0,1,1), 1, 0x777777FF);
for(n=0; n<nelem(cmapa); n++)
cmap[n] = eallocimage(Rect(0,0,1,1), 1, cmapa[n]);
viewp = buf;
loops = buf;
loope = bufe;
redrawbg(Rall);
f = pow(2, 1./12);
for(n=0; n<nelem(freq); n++)
freq[n] = 440 * pow(f, n - 69);
pause = 0;
dx = dy = 0;
Alt a[] = {
{mc->resizec, nil, CHANRCV},
{mc->c, &mc->Mouse, CHANRCV},
{kc->c, &r, CHANRCV},
{nil, nil, CHANEND}
};
if(threadcreate(athread, nil, mainstacksize) < 0)
sysfatal("threadcreate: %r");
for(;;){
switch(alt(a)){
case 0:
if(getwindow(display, Refnone) < 0)
sysfatal("resize failed: %r");
redrawbg(Rall);
mo = mc->Mouse;
break;
case 1:
if(eqpt(mo.xy, ZP))
mo = mc->Mouse;
switch(mc->buttons){
case 0: if(dx != 0 || dy != 0) redrawbg(Rzoom); dx = dy = 0; break;
case 1: setpos(); break;
case 2: setloop(); break;
case 4: dx = mo.xy.x - mc->xy.x; dy = mo.xy.y - mc->xy.y; setpan(dx, dy); break;
case 8: setscale(scale << 1); break;
case 16: setscale(scale >> 1); break;
}
mo = mc->Mouse;
break;
case 2:
switch(r){
case ' ':
if(pause ^= 1)
qlock(&lck);
else
qunlock(&lck);
break;
case 'b': bufp = loops; update(); break;
case 'r': loops = buf; loope = bufe; drawview(); break;
case Kdel:
case 'q': threadexitsall(nil);
case 'z':
if(scale == 1)
break;
scale = 1;
pan = (Point){0, 0};
redrawbg(Rzoom);
break;
case '9': setnfft(nfft >> 1); break;
case '0': setnfft(nfft << 1); break;
case '-': setscale(scale >> 1); break;
case '=':
case '+': setscale(scale << 1); break;
case 'w': writepcm(pause); break;
}
break;
}
}
}