ref: d9e95d51727004924d5c5cd495a53fd286543377
dir: /snd_plan9.c/
#include "quakedef.h" #include <thread.h> static int afd; static QLock alock; static uchar *mixbuf; static Channel *ach; long sndqueued(void) { Dir *d; long n; n = (d = dirfstat(afd)) != nil ? d->length : 0; free(d); return n; } static void auproc(void *p) { long sz, n; for(;;){ if((sz = recvul(p)) < 1) break; qlock(&alock); n = write(afd, mixbuf, sz); qunlock(&alock); if(n != sz){ Con_DPrintf("sndwrite: %r\n"); break; } } threadexits(nil); } void sndstop(void) { } void sndwrite(uchar *buf, long sz) { if(ach == nil) return; qlock(&alock); sendul(ach, sz); mixbuf = buf; qunlock(&alock); } void sndclose(void) { if(ach != nil){ chanclose(ach); close(afd); afd = -1; } } int sndopen(void) { if((afd = open("/dev/audio", OWRITE)) < 0) return -1; ach = chancreate(sizeof(ulong), 0); proccreate(auproc, ach, 4096); return 0; }