static
int alsa_seqmidi_start(alsa_midi_t *m)
{
alsa_seqmidi_t *self = (alsa_seqmidi_t*) m;
int err;
debug_log("midi: start");
if (!self->seq)
return -EBADF;
if (self->keep_walking)
return -EALREADY;
snd_seq_connect_from(self->seq, self->port_id, SND_SEQ_CLIENT_SYSTEM, SND_SEQ_PORT_SYSTEM_ANNOUNCE);
snd_seq_drop_input(self->seq);
add_existing_ports(self);
update_ports(self);
add_ports(&self->stream[PORT_INPUT]);
add_ports(&self->stream[PORT_OUTPUT]);
self->keep_walking = 1;
if ((err = pthread_create(&self->port_thread, NULL, port_thread, self))) {
self->keep_walking = 0;
return -errno;
}
return 0;
}
static int snd_rawmidi_virtual_drop(snd_rawmidi_t *rmidi)
{
snd_rawmidi_virtual_t *virt = rmidi->private_data;
if (rmidi->stream == SND_RAWMIDI_STREAM_OUTPUT) {
snd_seq_drop_output(virt->handle);
snd_midi_event_reset_encode(virt->midi_event);
virt->pending = 0;
} else {
snd_seq_drop_input(virt->handle);
snd_midi_event_reset_decode(virt->midi_event);
virt->in_buf_ofs = 0;
}
return 0;
}
int
connect_to_alsa (struct a2j* self)
{
int error;
void * thread_status;
self->port_add = jack_ringbuffer_create(2 * MAX_PORTS * sizeof(snd_seq_addr_t));
if (self->port_add == NULL) {
goto free_self;
}
self->port_del = jack_ringbuffer_create(2 * MAX_PORTS * sizeof(struct a2j_port *));
if (self->port_del == NULL) {
goto free_ringbuffer_add;
}
if (!a2j_stream_init(self)) {
goto free_ringbuffer_outbound;
}
if ((error = snd_seq_open(&self->seq, "hw", SND_SEQ_OPEN_DUPLEX, 0)) < 0) {
a2j_error("failed to open alsa seq");
goto close_stream;
}
if ((error = snd_seq_set_client_name(self->seq, "midi_in")) < 0) {
a2j_error("snd_seq_set_client_name() failed");
goto close_seq_client;
}
if ((self->port_id = snd_seq_create_simple_port(
self->seq,
"port",
SND_SEQ_PORT_CAP_READ|SND_SEQ_PORT_CAP_WRITE
#ifndef DEBUG
|SND_SEQ_PORT_CAP_NO_EXPORT
#endif
,SND_SEQ_PORT_TYPE_APPLICATION)) < 0) {
a2j_error("snd_seq_create_simple_port() failed");
goto close_seq_client;
}
if ((self->client_id = snd_seq_client_id(self->seq)) < 0) {
a2j_error("snd_seq_client_id() failed");
goto close_seq_client;
}
if ((self->queue = snd_seq_alloc_queue(self->seq)) < 0) {
a2j_error("snd_seq_alloc_queue() failed");
goto close_seq_client;
}
snd_seq_start_queue (self->seq, self->queue, 0);
a2j_stream_attach (&self->stream);
if ((error = snd_seq_nonblock(self->seq, 1)) < 0) {
a2j_error("snd_seq_nonblock() failed");
goto close_seq_client;
}
snd_seq_drop_input (self->seq);
a2j_add_ports(&self->stream);
if (sem_init(&self->io_semaphore, 0, 0) < 0) {
a2j_error("can't create IO semaphore");
goto close_jack_client;
}
g_keep_alsa_walking = true;
if (pthread_create(&self->alsa_io_thread, NULL, alsa_input_thread, self) < 0)
{
a2j_error("cannot start ALSA input thread");
goto sem_destroy;
}
/* wake the poll loop in the alsa input thread so initial ports are fetched */
if ((error = snd_seq_connect_from (self->seq, self->port_id, SND_SEQ_CLIENT_SYSTEM, SND_SEQ_PORT_SYSTEM_ANNOUNCE)) < 0) {
a2j_error("snd_seq_connect_from() failed");
goto join_io_thread;
}
return 0;
g_keep_alsa_walking = false; /* tell alsa threads to stop */
snd_seq_disconnect_from(self->seq, self->port_id, SND_SEQ_CLIENT_SYSTEM, SND_SEQ_PORT_SYSTEM_ANNOUNCE);
join_io_thread:
pthread_join(self->alsa_io_thread, &thread_status);
sem_destroy:
sem_destroy(&self->io_semaphore);
close_jack_client:
if ((error = jack_client_close(self->jack_client)) < 0) {
a2j_error("Cannot close jack client");
}
close_seq_client:
snd_seq_close(self->seq);
close_stream:
a2j_stream_close(self);
free_ringbuffer_outbound:
jack_ringbuffer_free(self->outbound_events);
jack_ringbuffer_free(self->port_del);
free_ringbuffer_add:
jack_ringbuffer_free(self->port_add);
free_self:
free(self);
return -1;
}
/**
* \brief reset client input pool
* \param seq sequencer handle
* \return 0 on success or negative error code
*
* So far, this works identically like #snd_seq_drop_input().
*/
int snd_seq_reset_pool_input(snd_seq_t *seq)
{
return snd_seq_drop_input(seq);
}
