static
int
a2j_alsa_connect_from (alsa_midi_driver_t * driver, int client, int port)
{
snd_seq_port_subscribe_t* sub;
snd_seq_addr_t seq_addr;
int err;
snd_seq_port_subscribe_alloca (&sub);
seq_addr.client = client;
seq_addr.port = port;
snd_seq_port_subscribe_set_sender (sub, &seq_addr);
seq_addr.client = driver->client_id;
seq_addr.port = driver->port_id;
snd_seq_port_subscribe_set_dest (sub, &seq_addr);
snd_seq_port_subscribe_set_time_update (sub, 1);
snd_seq_port_subscribe_set_queue (sub, driver->queue);
snd_seq_port_subscribe_set_time_real (sub, 1);
if ((err = snd_seq_subscribe_port (driver->seq, sub))) {
a2j_error ("can't subscribe to %d:%d - %s", client, port, snd_strerror(err));
}
return err;
}
void Alsa::openPort(unsigned int portNumber_)
{
if ( _connected ) {
this->closePort();
}
unsigned int nSrc = this->getPortCount();
if (nSrc < 1) {
std::cerr << "error: CxxMidi::Output::Alsa::openPort: no MIDI output sources found" << std::endl;
}
snd_seq_port_info_t *pinfo;
snd_seq_port_info_alloca( &pinfo );
std::ostringstream ost;
if ( portInfo( _apiData->seq, pinfo, SND_SEQ_PORT_CAP_WRITE|SND_SEQ_PORT_CAP_SUBS_WRITE, (int) portNumber_ ) == 0 )
{
std::cerr << "error: CxxMidi::Output::Alsa::openPort: port " << portNumber_ << " is invalid" << std::endl;
}
snd_seq_addr_t sender, receiver;
receiver.client = snd_seq_port_info_get_client( pinfo );
receiver.port = snd_seq_port_info_get_port( pinfo );
sender.client = snd_seq_client_id( _apiData->seq );
if ( _apiData->vport < 0 ) {
_apiData->vport = snd_seq_create_simple_port( _apiData->seq, "CxxMidi (RtMidi) output",
SND_SEQ_PORT_CAP_READ|SND_SEQ_PORT_CAP_SUBS_READ,
SND_SEQ_PORT_TYPE_MIDI_GENERIC|SND_SEQ_PORT_TYPE_APPLICATION );
if ( _apiData->vport < 0 ) {
std::cerr << "error: CxxMidi::Output::Alsa::openPort: error creating output port" << std::endl;
}
}
sender.port = _apiData->vport;
// Make subscription
snd_seq_port_subscribe_malloc( &_apiData->subscription );
snd_seq_port_subscribe_set_sender(_apiData->subscription, &sender);
snd_seq_port_subscribe_set_dest(_apiData->subscription, &receiver);
snd_seq_port_subscribe_set_time_update(_apiData->subscription, 1);
snd_seq_port_subscribe_set_time_real(_apiData->subscription, 1);
if ( snd_seq_subscribe_port(_apiData->seq, _apiData->subscription) ) {
std::cerr << "error: CxxMidi::Output::Alsa::openPort: error making port connection" << std::endl;
}
_connected = true;
}
/* TODO Make sample rate, buffer, gain and polyphony set from CL interface*/
void connect2MidiThroughPort(snd_seq_t *seq_handle) {
snd_seq_addr_t sender, dest;
snd_seq_port_subscribe_t *subs;
int myID;
myID=snd_seq_client_id(seq_handle);
fprintf(stderr,"MyID=%d",myID);
sender.client = 14;
sender.port = 0;
dest.client = myID;
dest.port = 0;
snd_seq_port_subscribe_alloca(&subs);
snd_seq_port_subscribe_set_sender(subs, &sender);
snd_seq_port_subscribe_set_dest(subs, &dest);
snd_seq_port_subscribe_set_queue(subs, 1);
snd_seq_port_subscribe_set_time_update(subs, 1);
snd_seq_port_subscribe_set_time_real(subs, 1);
snd_seq_subscribe_port(seq_handle, subs);
}
/**
* Connects this Alsa midi input device with an Alsa MIDI source.
*
* @param Client - Alsa sequencer client and port ID of a MIDI source
* (e.g. "64:0")
* @throws MidiInputException if connection cannot be established
*/
void MidiInputDeviceAlsa::MidiInputPortAlsa::ConnectToAlsaMidiSource(const char* MidiSource) {
snd_seq_addr_t sender, dest;
snd_seq_port_subscribe_t* subs;
int hExtClient, hExtPort;
sscanf(MidiSource, "%d:%d", &hExtClient, &hExtPort);
sender.client = (char) hExtClient;
sender.port = (char) hExtPort;
dest.client = (char) pDevice->hAlsaSeqClient;
dest.port = (char) portNumber;
snd_seq_port_subscribe_malloc(&subs);
snd_seq_port_subscribe_set_sender(subs, &sender);
snd_seq_port_subscribe_set_dest(subs, &dest);
snd_seq_port_subscribe_set_queue(subs, 1);
snd_seq_port_subscribe_set_time_update(subs, 1);
snd_seq_port_subscribe_set_time_real(subs, 1);
if (snd_seq_subscribe_port(pDevice->hAlsaSeq, subs) < 0) {
snd_seq_port_subscribe_free(subs);
throw MidiInputException(String("Unable to connect to Alsa seq client \'") + MidiSource + "\' (" + snd_strerror(errno) + ")");
}
subscriptions.push_back(subs);
}
static
int alsa_connect_from(alsa_seqmidi_t *self, int client, int port)
{
snd_seq_port_subscribe_t* sub;
snd_seq_addr_t seq_addr;
int err;
snd_seq_port_subscribe_alloca(&sub);
seq_addr.client = client;
seq_addr.port = port;
snd_seq_port_subscribe_set_sender(sub, &seq_addr);
seq_addr.client = self->client_id;
seq_addr.port = self->port_id;
snd_seq_port_subscribe_set_dest(sub, &seq_addr);
snd_seq_port_subscribe_set_time_update(sub, 1);
snd_seq_port_subscribe_set_queue(sub, self->queue);
snd_seq_port_subscribe_set_time_real(sub, 1);
if ((err=snd_seq_subscribe_port(self->seq, sub)))
error_log("can't subscribe to %d:%d - %s", client, port, snd_strerror(err));
return err;
}
int main(int argc, char **argv)
{
int c;
snd_seq_t *seq;
int queue = 0, convert_time = 0, convert_real = 0, exclusive = 0;
int command = SUBSCRIBE;
int list_perm = 0;
int client;
int list_subs = 0;
snd_seq_port_subscribe_t *subs;
snd_seq_addr_t sender, dest;
#ifdef ENABLE_NLS
setlocale(LC_ALL, "");
textdomain(PACKAGE);
#endif
while ((c = getopt_long(argc, argv, "dior:t:elx", long_option, NULL)) != -1) {
switch (c) {
case 'd':
command = UNSUBSCRIBE;
break;
case 'i':
command = LIST;
list_perm |= LIST_INPUT;
break;
case 'o':
command = LIST;
list_perm |= LIST_OUTPUT;
break;
case 'e':
exclusive = 1;
break;
case 'r':
queue = atoi(optarg);
convert_time = 1;
convert_real = 1;
break;
case 't':
queue = atoi(optarg);
convert_time = 1;
convert_real = 0;
break;
case 'l':
list_subs = 1;
break;
case 'x':
command = REMOVE_ALL;
break;
default:
usage();
exit(1);
}
}
if (snd_seq_open(&seq, "default", SND_SEQ_OPEN_DUPLEX, 0) < 0) {
fprintf(stderr, _("can't open sequencer\n"));
return 1;
}
snd_lib_error_set_handler(error_handler);
switch (command) {
case LIST:
do_search_port(seq, list_perm,
list_subs ? print_port_and_subs : print_port);
snd_seq_close(seq);
return 0;
case REMOVE_ALL:
remove_all_connections(seq);
snd_seq_close(seq);
return 0;
}
/* connection or disconnection */
if (optind + 2 > argc) {
snd_seq_close(seq);
usage();
exit(1);
}
if ((client = snd_seq_client_id(seq)) < 0) {
snd_seq_close(seq);
fprintf(stderr, _("can't get client id\n"));
return 1;
}
/* set client info */
if (snd_seq_set_client_name(seq, "ALSA Connector") < 0) {
snd_seq_close(seq);
fprintf(stderr, _("can't set client info\n"));
return 1;
}
/* set subscription */
if (snd_seq_parse_address(seq, &sender, argv[optind]) < 0) {
snd_seq_close(seq);
fprintf(stderr, _("invalid sender address %s\n"), argv[optind]);
return 1;
}
if (snd_seq_parse_address(seq, &dest, argv[optind + 1]) < 0) {
snd_seq_close(seq);
fprintf(stderr, _("invalid destination address %s\n"), argv[optind + 1]);
return 1;
}
snd_seq_port_subscribe_alloca(&subs);
snd_seq_port_subscribe_set_sender(subs, &sender);
snd_seq_port_subscribe_set_dest(subs, &dest);
snd_seq_port_subscribe_set_queue(subs, queue);
snd_seq_port_subscribe_set_exclusive(subs, exclusive);
snd_seq_port_subscribe_set_time_update(subs, convert_time);
snd_seq_port_subscribe_set_time_real(subs, convert_real);
if (command == UNSUBSCRIBE) {
if (snd_seq_get_port_subscription(seq, subs) < 0) {
snd_seq_close(seq);
fprintf(stderr, _("No subscription is found\n"));
return 1;
}
if (snd_seq_unsubscribe_port(seq, subs) < 0) {
snd_seq_close(seq);
fprintf(stderr, _("Disconnection failed (%s)\n"), snd_strerror(errno));
return 1;
}
} else {
if (snd_seq_get_port_subscription(seq, subs) == 0) {
snd_seq_close(seq);
fprintf(stderr, _("Connection is already subscribed\n"));
return 1;
}
if (snd_seq_subscribe_port(seq, subs) < 0) {
snd_seq_close(seq);
fprintf(stderr, _("Connection failed (%s)\n"), snd_strerror(errno));
return 1;
}
}
snd_seq_close(seq);
return 0;
}
bool midi_init() {
snd_seq_addr_t sender, receiver;
snd_seq_port_info_t *pinfo;
snd_seq_client_info_t *cinfo;
bool found = false;
if (snd_seq_open(&s_midi, "default", SND_SEQ_OPEN_OUTPUT, 0) < 0) {
Error("Failed to initialize MIDI\n");
s_midi = NULL;
return false;
}
snd_seq_set_client_name(s_midi, s_midiCaption);
/* Create a port to work on */
s_midiPort = snd_seq_create_simple_port(s_midi, s_midiCaption, SND_SEQ_PORT_CAP_READ | SND_SEQ_PORT_CAP_SUBS_READ, SND_SEQ_PORT_TYPE_MIDI_GENERIC);
if (s_midiPort < 0) {
Error("Failed to initialize MIDI\n");
snd_seq_close(s_midi);
s_midi = NULL;
return false;
}
/* Try to find a MIDI out */
snd_seq_port_info_alloca(&pinfo);
snd_seq_client_info_alloca(&cinfo);
snd_seq_client_info_set_client(cinfo, -1);
/* Walk all clients and ports, and see if one matches our demands */
while (snd_seq_query_next_client(s_midi, cinfo) >= 0 && !found) {
int client;
client = snd_seq_client_info_get_client(cinfo);
if (client == 0) continue;
snd_seq_port_info_set_client(pinfo, client);
snd_seq_port_info_set_port(pinfo, -1);
while (snd_seq_query_next_port(s_midi, pinfo) >= 0) {
if ((snd_seq_port_info_get_capability(pinfo) & (SND_SEQ_PORT_CAP_WRITE | SND_SEQ_PORT_CAP_SUBS_WRITE)) != (SND_SEQ_PORT_CAP_WRITE | SND_SEQ_PORT_CAP_SUBS_WRITE)) continue;
/* Most linux installations come with a Midi Through Port.
* This is 'hardware' support that mostly ends up on your serial, which
* you most likely do not have connected. So we skip it by default. */
if (strncmp("Midi Through Port", snd_seq_port_info_get_name(pinfo), 17) == 0) continue;
found = true;
break;
}
}
if (!found) {
Error("No valid MIDI output ports.\n Please install and start Timidity++ like: timidity -iA\n");
snd_seq_delete_port(s_midi, s_midiPort);
snd_seq_close(s_midi);
s_midi = NULL;
return false;
}
/* Subscribe ourself to the port */
receiver.client = snd_seq_port_info_get_client(pinfo);
receiver.port = snd_seq_port_info_get_port(pinfo);
sender.client = snd_seq_client_id(s_midi);
sender.port = s_midiPort;
snd_seq_port_subscribe_malloc(&s_midiSubscription);
snd_seq_port_subscribe_set_sender(s_midiSubscription, &sender);
snd_seq_port_subscribe_set_dest(s_midiSubscription, &receiver);
snd_seq_port_subscribe_set_time_update(s_midiSubscription, 1);
snd_seq_port_subscribe_set_time_real(s_midiSubscription, 1);
if (snd_seq_subscribe_port(s_midi, s_midiSubscription) < 0) {
Error("Failed to subscript to MIDI output\n");
snd_seq_delete_port(s_midi, s_midiPort);
snd_seq_close(s_midi);
s_midi = NULL;
return false;
}
/* Start the MIDI decoder */
if (snd_midi_event_new(4, &s_midiCoder) < 0) {
Error("Failed to initialize MIDI decoder\n");
snd_seq_delete_port(s_midi, s_midiPort);
snd_seq_close(s_midi);
s_midi = NULL;
return false;
}
snd_midi_event_init(s_midiCoder);
return true;
}
void event_decoder(snd_seq_t *handle, int argc, char *argv[])
{
snd_seq_event_t *ev;
snd_seq_port_info_t *pinfo;
snd_seq_port_subscribe_t *sub;
snd_seq_addr_t addr;
int client, port, queue, max, err, v1, v2;
char *ptr;
struct pollfd *pfds;
if ((client = snd_seq_client_id(handle))<0) {
fprintf(stderr, "Cannot determine client number: %s\n", snd_strerror(client));
return;
}
printf("Client ID = %i\n", client);
if ((queue = snd_seq_alloc_queue(handle))<0) {
fprintf(stderr, "Cannot allocate queue: %s\n", snd_strerror(queue));
return;
}
printf("Queue ID = %i\n", queue);
if ((err = snd_seq_nonblock(handle, 1))<0)
fprintf(stderr, "Cannot set nonblock mode: %s\n", snd_strerror(err));
snd_seq_port_info_alloca(&pinfo);
snd_seq_port_info_set_name(pinfo, "Input");
snd_seq_port_info_set_type(pinfo, SND_SEQ_PORT_TYPE_MIDI_GENERIC);
snd_seq_port_info_set_capability(pinfo, SND_SEQ_PORT_CAP_WRITE | SND_SEQ_PORT_CAP_READ | SND_SEQ_PORT_CAP_SUBS_WRITE);
/* Enable timestamping for events sent by external subscribers. */
snd_seq_port_info_set_timestamping(pinfo, 1);
snd_seq_port_info_set_timestamp_real(pinfo, 1);
snd_seq_port_info_set_timestamp_queue(pinfo, queue);
if ((err = snd_seq_create_port(handle, pinfo)) < 0) {
fprintf(stderr, "Cannot create input port: %s\n", snd_strerror(err));
return;
}
port = snd_seq_port_info_get_port(pinfo);
event_decoder_start_timer(handle, queue, client, port);
snd_seq_port_subscribe_alloca(&sub);
addr.client = SND_SEQ_CLIENT_SYSTEM;
addr.port = SND_SEQ_PORT_SYSTEM_ANNOUNCE;
snd_seq_port_subscribe_set_sender(sub, &addr);
addr.client = client;
addr.port = port;
snd_seq_port_subscribe_set_dest(sub, &addr);
snd_seq_port_subscribe_set_queue(sub, queue);
snd_seq_port_subscribe_set_time_update(sub, 1);
snd_seq_port_subscribe_set_time_real(sub, 1);
if ((err = snd_seq_subscribe_port(handle, sub))<0) {
fprintf(stderr, "Cannot subscribe announce port: %s\n", snd_strerror(err));
return;
}
addr.client = SND_SEQ_CLIENT_SYSTEM;
addr.port = SND_SEQ_PORT_SYSTEM_TIMER;
snd_seq_port_subscribe_set_sender(sub, &addr);
if ((err = snd_seq_subscribe_port(handle, sub))<0) {
fprintf(stderr, "Cannot subscribe timer port: %s\n", snd_strerror(err));
return;
}
for (max = 0; max < argc; max++) {
ptr = argv[max];
if (!ptr)
continue;
snd_seq_port_subscribe_set_time_real(sub, 0);
if (tolower(*ptr) == 'r') {
snd_seq_port_subscribe_set_time_real(sub, 1);
ptr++;
}
if (sscanf(ptr, "%i.%i", &v1, &v2) != 2) {
fprintf(stderr, "Wrong argument '%s'...\n", argv[max]);
return;
}
addr.client = v1;
addr.port = v2;
snd_seq_port_subscribe_set_sender(sub, &addr);
if ((err = snd_seq_subscribe_port(handle, sub))<0) {
fprintf(stderr, "Cannot subscribe port %i from client %i: %s\n", v2, v1, snd_strerror(err));
return;
}
}
max = snd_seq_poll_descriptors_count(handle, POLLIN);
pfds = alloca(sizeof(*pfds) * max);
while (1) {
snd_seq_poll_descriptors(handle, pfds, max, POLLIN);
if (poll(pfds, max, -1) < 0)
break;
do {
if ((err = snd_seq_event_input(handle, &ev))<0)
break;
if (!ev)
continue;
decode_event(ev);
snd_seq_free_event(ev);
} while (err > 0);
}
}
