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/**
* @file sndio.c SndIO sound driver
*
* Copyright (C) 2014 Creytiv.com
*/
#include <stdlib.h>
#include <string.h>
#include <sndio.h>
#include <pthread.h>
#include <re.h>
#include <rem.h>
#include <baresip.h>
/**
* @defgroup sndio sndio
*
* This module implements audio driver for OpenBSD sndio
*/
struct ausrc_st {
const struct ausrc *as; /* pointer to base-class */
struct sio_hdl *hdl;
pthread_t thread;
int16_t *sampv;
size_t sampc;
int run;
ausrc_read_h *rh;
void *arg;
};
struct auplay_st {
const struct auplay *ap; /* pointer to base-class */
struct sio_hdl *hdl;
pthread_t thread;
int16_t *sampv;
size_t sampc;
int run;
auplay_write_h *wh;
void *arg;
};
static struct ausrc *ausrc;
static struct auplay *auplay;
static struct sio_par *sndio_initpar(uint32_t srate, uint8_t ch)
{
struct sio_par *par = NULL;
if ((par = mem_zalloc(sizeof(*par), NULL)) == NULL)
return NULL;
sio_initpar(par);
/* sndio doesn't support a-low and u-low */
par->bits = 16;
par->bps = SIO_BPS(par->bits);
par->sig = 1;
par->le = SIO_LE_NATIVE;
par->rchan = ch;
par->pchan = ch;
par->rate = srate;
return par;
}
static void *read_thread(void *arg)
{
struct ausrc_st *st = arg;
if (!sio_start(st->hdl)) {
warning("sndio: could not start record\n");
goto out;
}
while (st->run) {
size_t n = sio_read(st->hdl, st->sampv, st->sampc*2);
st->rh(st->sampv, n/2, st->arg);
}
out:
return NULL;
}
static void *write_thread(void *arg)
{
struct auplay_st *st = arg;
if (!sio_start(st->hdl)) {
warning("sndio: could not start playback\n");
goto out;
}
while (st->run) {
st->wh(st->sampv, st->sampc, st->arg);
sio_write(st->hdl, st->sampv, st->sampc*2);
}
out:
return NULL;
}
static void ausrc_destructor(void *arg)
{
struct ausrc_st *st = arg;
if (st->run) {
st->run = false;
(void)pthread_join(st->thread, NULL);
}
if (st->hdl)
sio_close(st->hdl);
mem_deref(st->sampv);
}
static void auplay_destructor(void *arg)
{
struct auplay_st *st = arg;
if (st->run) {
st->run = false;
(void)pthread_join(st->thread, NULL);
}
if (st->hdl)
sio_close(st->hdl);
mem_deref(st->sampv);
}
static int src_alloc(struct ausrc_st **stp, const struct ausrc *as,
struct media_ctx **ctx,
struct ausrc_prm *prm, const char *device,
ausrc_read_h *rh, ausrc_error_h *errh, void *arg)
{
struct ausrc_st *st;
struct sio_par *par = NULL;
int err;
const char *name;
(void)ctx;
(void)errh;
if (!stp || !as || !prm)
return EINVAL;
name = (str_isset(device)) ? device : SIO_DEVANY;
if ((st = mem_zalloc(sizeof(*st), ausrc_destructor)) == NULL)
return ENOMEM;
st->as = as;
st->rh = rh;
st->arg = arg;
st->hdl = sio_open(name, SIO_REC, 0);
if (!st->hdl) {
warning("sndio: could not open ausrc device '%s'\n", name);
err = EINVAL;
goto out;
}
par = sndio_initpar(prm->srate, prm->ch);
if (!par) {
err = ENOMEM;
goto out;
}
if (!sio_setpar(st->hdl, par)) {
err = EINVAL;
goto out;
}
if (!sio_getpar(st->hdl, par)) {
err = EINVAL;
goto out;
}
st->sampc = par->bufsz / 2;
st->sampv = mem_alloc(2 * st->sampc, NULL);
if (!st->sampv) {
err = ENOMEM;
goto out;
}
st->run = true;
err = pthread_create(&st->thread, NULL, read_thread, st);
if (err)
st->run = false;
out:
mem_deref(par);
if (err)
mem_deref(st);
else
*stp = st;
return err;
}
static int play_alloc(struct auplay_st **stp, const struct auplay *ap,
struct auplay_prm *prm, const char *device,
auplay_write_h *wh, void *arg)
{
struct auplay_st *st;
struct sio_par *par = NULL;
int err;
const char *name;
if (!stp || !ap || !prm)
return EINVAL;
name = (str_isset(device)) ? device : SIO_DEVANY;
if ((st = mem_zalloc(sizeof(*st), auplay_destructor)) == NULL)
return ENOMEM;
st->ap = ap;
st->wh = wh;
st->arg = arg;
st->hdl = sio_open(name, SIO_PLAY, 0);
if (!st->hdl) {
warning("sndio: could not open auplay device '%s'\n", name);
err = EINVAL;
goto out;
}
par = sndio_initpar(prm->srate, prm->ch);
if (!par) {
err = ENOMEM;
goto out;
}
if (!sio_setpar(st->hdl, par)) {
err = EINVAL;
goto out;
}
if (!sio_getpar(st->hdl, par)) {
err = EINVAL;
goto out;
}
st->sampc = prm->srate * prm->ch * prm->ptime / 1000;
st->sampv = mem_alloc(2 * st->sampc, NULL);
if (!st->sampv) {
err = ENOMEM;
goto out;
}
st->run = true;
err = pthread_create(&st->thread, NULL, write_thread, st);
if (err)
st->run = false;
out:
mem_deref(par);
if (err)
mem_deref(st);
else
*stp = st;
return err;
}
static int sndio_init(void)
{
int err = 0;
err |= ausrc_register(&ausrc, baresip_ausrcl(), "sndio", src_alloc);
err |= auplay_register(&auplay, baresip_auplayl(),
"sndio", play_alloc);
return err;
}
static int sndio_close(void)
{
ausrc = mem_deref(ausrc);
auplay = mem_deref(auplay);
return 0;
}
EXPORT_SYM const struct mod_export DECL_EXPORTS(sndio) = {
"sndio",
"sound",
sndio_init,
sndio_close
};
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