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align writes to block size

This commit is contained in:
Alexandre Ratchov 2012-09-02 16:41:27 +02:00
parent 759c751cfd
commit 9ca454512a
1 changed files with 11 additions and 0 deletions
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11
libsndio/sio_aucat.c
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@ -43,6 +43,8 @@ struct sio_aucat_hdl {
#define PSTATE_INIT 0
#define PSTATE_RUN 1
int pstate;
size_t round; /* write block size */
size_t walign; /* align write packets size to this */
};
static void sio_aucat_close(struct sio_hdl *);
@ -165,6 +167,8 @@ sio_aucat_open(const char *str, unsigned int mode, int nbio)
hdl->curvol = SIO_MAXVOL;
hdl->reqvol = SIO_MAXVOL;
hdl->pstate = PSTATE_INIT;
hdl->round = 0xdeadbeef;
hdl->walign = 0xdeadbeef;
return (struct sio_hdl *)hdl;
}
@ -193,6 +197,7 @@ sio_aucat_start(struct sio_hdl *sh)
hdl->wbpf = par.bps * par.pchan;
hdl->rbpf = par.bps * par.rchan;
hdl->maxwrite = hdl->wbpf * par.bufsz;
hdl->round = par.round;
hdl->delta = 0;
DPRINTF("aucat: start, maxwrite = %d\n", hdl->maxwrite);
@ -205,6 +210,7 @@ sio_aucat_start(struct sio_hdl *sh)
hdl->aucat.rtodo = sizeof(struct amsg);
if (!aucat_setfl(&hdl->aucat, 1, &hdl->sio.eof))
return 0;
hdl->walign = hdl->round * hdl->wbpf;
hdl->pstate = PSTATE_RUN;
return 1;
}
@ -425,8 +431,13 @@ sio_aucat_write(struct sio_hdl *sh, const void *buf, size_t len)
return 0;
if (len > hdl->maxwrite)
len = hdl->maxwrite;
if (len > hdl->walign)
len = hdl->walign;
n = aucat_wdata(&hdl->aucat, buf, len, hdl->wbpf, &hdl->sio.eof);
hdl->maxwrite -= n;
hdl->walign -= n;
if (hdl->walign == 0)
hdl->walign = hdl->round * hdl->wbpf;
return n;
}