ref: 29c7ca80c9df8f805217be9bb9a9a083ff12912d
dir: /sys/src/games/music/jukebox/playlist.c/
#include <u.h>
#include <libc.h>
#include <thread.h>
#include <draw.h>
#include <keyboard.h>
#include <mouse.h>
#include <control.h>
#include "playlist.h"
#include "../debug.h"
char *playlistfile = "/mnt/playlist";
char *playctlfile = "/mnt/playctl";
char *playvolfile = "/mnt/playvol";
char *volumefile = "/dev/audioctl";
Playlist playlist;
int playctlfd;
void
playlistproc(void*)
{
int fd, m, n, nf;
static char buf[8192+1];
char *p, *q, *fields[4];
threadsetname("playlistproc");
fd = open(playlistfile, OREAD);
if(fd < 0)
sysfatal("%s: %r", playlistfile);
p = buf;
n = 0;
if(debug & DBGPLAY)
fprint(2, "playlistproc: starting\n");
for(;;){
m = read(fd, buf+n, sizeof buf - 1 - n);
if(m == 0){
if(debug & DBGPLAY)
fprint(2, "playlistproc: empty read\n");
continue;
}
if(m < 0){
rerrstr(buf, sizeof(buf));
if(strcmp(buf, "reading past eof"))
sysfatal("%s: %r", playlistfile);
for(n = 0; n < playlist.nentries; n++){
free(playlist.entry[n].file);
free(playlist.entry[n].onum);
}
if(debug & DBGPLAY)
fprint(2, "playlistproc: trunc\n");
playlist.nentries = 0;
free(playlist.entry);
playlist.entry = nil;
updateplaylist(1);
seek(fd, 0, 0);
p = buf;
n = 0;
continue;
}
if(debug & DBGPLAY)
fprint(2, "playlistproc: read %d bytes\n", m);
n += m;
p[n] = '\0';
while(q = strchr(p, '\n')){
*q = 0;
nf = tokenize(p, fields, nelem(fields));
if(nf){
playlist.entry = realloc(playlist.entry, (playlist.nentries+1)*sizeof playlist.entry[0]);
if(playlist.entry == nil)
sysfatal("realloc %r");
playlist.entry[playlist.nentries].file = strdup(fields[0]);
if(nf > 1){
playlist.entry[playlist.nentries].onum = strdup(fields[1]);
if(debug & DBGPLAY)
fprint(2, "playlistproc: [%d]: %q %q\n", playlist.nentries,
playlist.entry[playlist.nentries].file,
playlist.entry[playlist.nentries].onum);
}else{
playlist.entry[playlist.nentries].onum = nil;
if(debug & DBGPLAY)
fprint(2, "playlistproc: [%d]: %q nil\n", playlist.nentries,
playlist.entry[playlist.nentries].file);
}
updateplaylist(0); // this will also update nentries
}
q++;
n -= q-p;
p = q;
}
if(n)
memmove(buf, p, n);
p = buf;
}
}
void
sendplaylist(char *file, char *onum)
{
static int fd = -1;
char *b;
if(file == nil){
if(fd >= 0)
close(fd);
fd = open(playlistfile, OWRITE|OTRUNC);
if(fd < 0)
sysfatal("%s: truncate: %r", playlistfile);
return;
}
if(fd < 0){
fd = open(playlistfile, OWRITE);
if(fd < 0)
sysfatal("%s: %r", playlistfile);
}
b = smprint("%q %q\n", file, onum);
if(debug & DBGPLAY)
fprint(2, "sendplaylist @%s@\n", b);
if(write(fd , b, strlen(b)) != strlen(b))
sysfatal("sendplaylist: %r");
}
void
playctlproc(void*a)
{
int fd, n, nf;
static char buf[512+1];
char *fields[4];
Channel *chan;
threadsetname("playctlproc");
chan = a;
fd = open(playctlfile, OREAD);
if(fd < 0)
sysfatal("%s: %r", playctlfile);
for(;;){
n = read(fd, buf, sizeof buf -1);
if(n == 0)
continue;
if(n < 0)
sysfatal("%s: %r", playctlfile);
buf[n] = '\0';
nf = tokenize(buf, fields, nelem(fields));
if(nf == 0)
continue;
switch (nf){
default:
sysfatal("playctlproc: [%d]: %s", nf, fields[0]);
case 3:
chanprint(chan, "playctlproc: error %lud %q", strtoul(fields[1], nil, 0), fields[2]);
if(strcmp(fields[0], "error") == 0)
break;
// fall through
case 2:
chanprint(chan, "playctlproc: %s %lud", fields[0], strtoul(fields[1], nil, 0));
}
}
}
void
sendplayctl(char *fmt, ...)
{
va_list arg;
static int fd = -1;
va_start(arg, fmt);
if(debug & DBGPLAY){
fprint(2, "sendplayctl: fmt=%s: ", fmt);
fprint(2, fmt, arg);
fprint(2, "\n");
}
fprint(fd, fmt, arg);
va_end(arg);
}
void
setvolume(char *volume)
{
static int fd;
if(fd == 0){
fd = open(playvolfile, OWRITE);
if(fd < 0){
fprint(2, "can't open %s, (%r) opening %s instead\n", playvolfile, "/dev/volume");
if((fd = open("/dev/volume", OWRITE)) < 0){
fprint(2, "setvolume: open: %r\n");
return;
}
}
}
if(fd < 0)
return;
fprint(fd, "volume %s", volume);
}
void
volumeproc(void *arg)
{
int fd, n, nf, nnf, i, nlines;
static char buf[1024];
char *lines[32];
char *fields[8];
char *subfields[8];
Channel *ctl;
int volume, minvolume, maxvolume, nvolume;
ctl = arg;
threadsetname("volumeproc");
fd = open(volumefile, OREAD);
if(fd < 0){
fprint(2, "%s: %r\n", volumefile);
threadexits(nil);
}
for(;;){
n = read(fd, buf, sizeof buf -1);
if(n == 0)
continue;
if(n < 0){
fprint(2, "volumeproc: read: %r\n");
threadexits("volumeproc");
}
buf[n] = '\0';
nlines = getfields(buf, lines, nelem(lines), 1, "\n");
for(i = 0; i < nlines; i++){
nf = tokenize(lines[i], fields, nelem(fields));
if(nf == 0)
continue;
if(nf != 6 || strcmp(fields[0], "volume") || strcmp(fields[1], "out"))
continue;
minvolume = strtol(fields[3], nil, 0);
maxvolume = strtol(fields[4], nil, 0);
if(minvolume >= maxvolume)
continue;
nnf = tokenize(fields[2], subfields, nelem(subfields));
if(nnf <= 0 || nnf > 8){
fprint(2, "volume format error\n");
threadexits(nil);
}
volume = 0;
nvolume = 0;
for(i = 0; i < nnf; i++){
volume += strtol(subfields[i], nil, 0);
nvolume++;
}
volume /= nvolume;
volume = 100*(volume - minvolume)/(maxvolume-minvolume);
chanprint(ctl, "volume value %d", volume);
}
}
}
void
playvolproc(void*a)
{
int fd, n, nf, volume, nvolume, i;
static char buf[256+1];
static errors;
char *fields[3], *subfields[9];
Channel *chan;
threadsetname("playvolproc");
chan = a;
fd = open(playvolfile, OREAD);
if(fd < 0)
sysfatal("%s: %r", playvolfile);
for(;;){
n = read(fd, buf, sizeof buf -1);
if(n == 0)
continue;
if(n < 0){
fprint(2, "%s: %r\n", playvolfile);
threadexits("playvolproc");
}
buf[n] = '\0';
if(debug) fprint(2, "volumestring: %s\n", buf);
nf = tokenize(buf, fields, nelem(fields));
if(nf == 0)
continue;
if(nf != 2 || strcmp(fields[0], "volume")){
fprint(2, "playvolproc: [%d]: %s\n", nf, fields[0]);
if(errors++ > 32)
threadexits("playvolproc");
continue;
}
nvolume = tokenize(fields[1], subfields, nelem(subfields));
if(nvolume <= 0 || nvolume > 8){
fprint(2, "volume format error\n");
if(errors++ > 32)
threadexits("playvolproc");
continue;
}
volume = 0;
for(i = 0; i < nvolume; i++)
volume += strtol(subfields[i], nil, 0);
volume /= nvolume;
chanprint(chan, "volume value %d", volume);
}
}