/*
* Initialise the EMUX Synth by creating a client and registering
* a series of ports.
* Each of the ports will contain the 16 midi channels. Applications
* can connect to these ports to play midi data.
*/
int
snd_emux_init_seq(snd_emux_t *emu, snd_card_t *card, int index)
{
int i;
snd_seq_port_callback_t pinfo;
char tmpname[64];
sprintf(tmpname, "%s WaveTable", emu->name);
emu->client = get_client(card, index, tmpname);
if (emu->client < 0) {
snd_printk("can't create client\n");
return -ENODEV;
}
if (emu->num_ports < 0) {
snd_printk("seqports must be greater than zero\n");
emu->num_ports = 1;
} else if (emu->num_ports >= SNDRV_EMUX_MAX_PORTS) {
snd_printk("too many ports."
"limited max. ports %d\n", SNDRV_EMUX_MAX_PORTS);
emu->num_ports = SNDRV_EMUX_MAX_PORTS;
}
memset(&pinfo, 0, sizeof(pinfo));
pinfo.owner = THIS_MODULE;
pinfo.use = snd_emux_use;
pinfo.unuse = snd_emux_unuse;
pinfo.event_input = snd_emux_event_input;
for (i = 0; i < emu->num_ports; i++) {
snd_emux_port_t *p;
sprintf(tmpname, "%s Port %d", emu->name, i);
p = snd_emux_create_port(emu, tmpname, MIDI_CHANNELS,
0, &pinfo);
if (p == NULL) {
snd_printk("can't create port\n");
return -ENOMEM;
}
p->port_mode = SNDRV_EMUX_PORT_MODE_MIDI;
snd_emux_init_port(p);
emu->ports[i] = p->chset.port;
emu->portptrs[i] = p;
}
return 0;
}
/*
* Routine that is called upon a first use of a particular port
*/
static int
snd_emux_use(void *private_data, snd_seq_port_subscribe_t *info)
{
snd_emux_port_t *p;
snd_emux_t *emu;
p = private_data;
snd_assert(p != NULL, return -EINVAL);
emu = p->emu;
snd_assert(emu != NULL, return -EINVAL);
down(&emu->register_mutex);
snd_emux_init_port(p);
snd_emux_inc_count(emu);
up(&emu->register_mutex);
return 0;
}
/*
* Routine that is called upon a first use of a particular port
*/
static int
snd_emux_use(void *private_data, struct snd_seq_port_subscribe *info)
{
struct snd_emux_port *p;
struct snd_emux *emu;
p = private_data;
snd_assert(p != NULL, return -EINVAL);
emu = p->emu;
snd_assert(emu != NULL, return -EINVAL);
mutex_lock(&emu->register_mutex);
snd_emux_init_port(p);
snd_emux_inc_count(emu);
mutex_unlock(&emu->register_mutex);
return 0;
}
/*
* Routine that is called upon a first use of a particular port
*/
static int
snd_emux_use(void *private_data, struct snd_seq_port_subscribe *info)
{
struct snd_emux_port *p;
struct snd_emux *emu;
p = private_data;
if (snd_BUG_ON(!p))
return -EINVAL;
emu = p->emu;
if (snd_BUG_ON(!emu))
return -EINVAL;
mutex_lock(&emu->register_mutex);
snd_emux_init_port(p);
snd_emux_inc_count(emu);
mutex_unlock(&emu->register_mutex);
return 0;
}
