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/**
* @file device.c Audio bridge -- virtual device table
*
* Copyright (C) 2010 Creytiv.com
*/
#include <re.h>
#include <rem.h>
#include <baresip.h>
#include <pthread.h>
#include "aubridge.h"
/* The packet-time is fixed to 20 milliseconds */
enum {PTIME = 20};
struct device {
struct le le;
const struct ausrc_st *ausrc;
const struct auplay_st *auplay;
char name[64];
pthread_t thread;
volatile bool run;
};
static void destructor(void *arg)
{
struct device *dev = arg;
device_stop(dev);
list_unlink(&dev->le);
}
static bool list_apply_handler(struct le *le, void *arg)
{
struct device *st = le->data;
return 0 == str_cmp(st->name, arg);
}
static struct device *find_device(const char *device)
{
return list_ledata(hash_lookup(ht_device, hash_joaat_str(device),
list_apply_handler, (void *)device));
}
static void *device_thread(void *arg)
{
uint64_t now, ts = tmr_jiffies();
struct device *dev = arg;
struct auresamp rs;
int16_t *sampv_in, *sampv_out;
size_t sampc_in;
size_t sampc_out;
int err;
sampc_in = dev->auplay->prm.srate * dev->auplay->prm.ch * PTIME/1000;
sampc_out = dev->ausrc->prm.srate * dev->ausrc->prm.ch * PTIME/1000;
auresamp_init(&rs);
sampv_in = mem_alloc(2 * sampc_in, NULL);
sampv_out = mem_alloc(2 * sampc_out, NULL);
if (!sampv_in || !sampv_out)
goto out;
err = auresamp_setup(&rs,
dev->auplay->prm.srate, dev->auplay->prm.ch,
dev->ausrc->prm.srate, dev->ausrc->prm.ch);
if (err)
goto out;
while (dev->run) {
(void)sys_msleep(4);
if (!dev->run)
break;
now = tmr_jiffies();
if (ts > now)
continue;
if (dev->auplay && dev->auplay->wh) {
dev->auplay->wh(sampv_in, sampc_in, dev->auplay->arg);
}
err = auresamp(&rs,
sampv_out, &sampc_out,
sampv_in, sampc_in);
if (err) {
warning("aubridge: auresamp error: %m\n", err);
}
if (dev->ausrc && dev->ausrc->rh) {
dev->ausrc->rh(sampv_out, sampc_out,
dev->ausrc->arg);
}
ts += PTIME;
}
out:
mem_deref(sampv_in);
mem_deref(sampv_out);
return NULL;
}
int device_connect(struct device **devp, const char *device,
struct auplay_st *auplay, struct ausrc_st *ausrc)
{
struct device *dev;
int err = 0;
if (!devp)
return EINVAL;
if (!str_isset(device))
return ENODEV;
dev = find_device(device);
if (dev) {
*devp = mem_ref(dev);
}
else {
dev = mem_zalloc(sizeof(*dev), destructor);
if (!dev)
return ENOMEM;
str_ncpy(dev->name, device, sizeof(dev->name));
hash_append(ht_device, hash_joaat_str(device), &dev->le, dev);
*devp = dev;
debug("aubridge: created device '%s'\n", device);
}
if (auplay)
dev->auplay = auplay;
if (ausrc)
dev->ausrc = ausrc;
/* wait until we have both SRC+PLAY */
if (dev->ausrc && dev->auplay && !dev->run) {
dev->run = true;
err = pthread_create(&dev->thread, NULL, device_thread, dev);
if (err) {
dev->run = false;
}
}
return err;
}
void device_stop(struct device *dev)
{
if (!dev)
return;
dev->auplay = NULL;
dev->ausrc = NULL;
if (dev->run) {
dev->run = false;
pthread_join(dev->thread, NULL);
}
}
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