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- #include <u.h>
- #include <libc.h>
- #include <thread.h>
- #include <fcall.h>
- #include "pool.h"
- #include "playlist.h"
- int minvolume, maxvolume;
- void
- volumeproc(void *)
- {
- int fd, n, nf, i, nlines;
- static char buf[1024];
- char *lines[32];
- char *fields[8];
- char *subfields[9];
- int volume[8], nvolumes;
- threadsetname("volumeproc");
- close(srvfd[1]);
- fd = open("/dev/audioctl", OREAD);
- if (fd < 0)
- 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;
- nvolumes = tokenize(fields[2], subfields, nelem(subfields));
- if (nvolumes <= 0 || nvolumes > 8)
- sysfatal("bad volume data");
- if (debug)
- fprint(2, "volume changed to '");
- for (i = 0; i < nvolumes; i++){
- volume[i] = strtol(subfields[i], nil, 0);
- volume[i]= 100*(volume[i]- minvolume)/(maxvolume-minvolume);
- if (debug)
- fprint(2, " %d", volume[i]);
- }
- if (debug)
- fprint(2, "'\n");
- while (i < 8)
- volume[i++] = Undef;
- send(volumechan, volume);
- }
- }
- }
- void
- volumeset(int *v)
- {
- int fd, i;
- char buf[256], *p;
- fd = open("/dev/audioctl", OWRITE);
- if (fd < 0){
- fd = open("/dev/volume", OWRITE);
- if (fd < 0){
- fprint(2, "Can't set volume: %r");
- return;
- }
- fprint(fd, "audio out %d", v[0]);
- v[1] = Undef;
- send(volumechan, volume);
- } else {
- p = buf;
- for (i = 0; i < 8; i++){
- if (v[i] == Undef) break;
- p = seprint(p, buf+sizeof buf, (p==buf)?"volume out '%d":" %d",
- minvolume + v[i] * (maxvolume-minvolume) / 100);
- }
- p = seprint(p, buf+sizeof buf, "'\n");
- write(fd, buf, p-buf);
- }
- close(fd);
- }
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