QString MidiAlsaDevice::open()
{
_openFlags &= _rwFlags; // restrict to available bits
snd_seq_port_subscribe_t* subs;
// Allocated on stack, no need to call snd_seq_port_subscribe_free() later.
snd_seq_port_subscribe_alloca(&subs);
QString estr;
int wer = 0;
int rer = 0;
// subscribe for writing
if (_openFlags & 1)
{
snd_seq_port_subscribe_set_sender(subs, &losPort);
snd_seq_port_subscribe_set_dest(subs, &adr);
// Not already subscribed (or error)? Then try subscribing.
if (snd_seq_get_port_subscription(alsaSeq, subs) < 0)
{
wer = snd_seq_subscribe_port(alsaSeq, subs);
if (wer < 0)
estr += (QString("Play: ") + QString(snd_strerror(wer)) + QString(" "));
}
if (!wer)
_writeEnable = true;
}
// subscribe for reading
if (_openFlags & 2)
{
snd_seq_port_subscribe_set_dest(subs, &losPort);
snd_seq_port_subscribe_set_sender(subs, &adr);
// Not already subscribed (or error)? Then try subscribing.
if (snd_seq_get_port_subscription(alsaSeq, subs) < 0)
{
//int error = snd_seq_subscribe_port(alsaSeq, subs);
rer = snd_seq_subscribe_port(alsaSeq, subs);
if (rer < 0)
estr += (QString("Rec: ") + QString(snd_strerror(rer)));
}
if (!rer)
_readEnable = true;
}
if (wer < 0 || rer < 0)
return estr;
return QString("OK");
}
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;
}
bool midibus::init_in ()
{
#ifdef HAVE_LIBASOUND
int result = snd_seq_create_simple_port /* create ports */
(
m_seq, "seq24 in",
SND_SEQ_PORT_CAP_NO_EXPORT | SND_SEQ_PORT_CAP_WRITE,
SND_SEQ_PORT_TYPE_MIDI_GENERIC | SND_SEQ_PORT_TYPE_APPLICATION
);
m_local_addr_port = result;
if (result < 0)
{
errprint("snd_seq_create_simple_port(read) error");
return false;
}
snd_seq_port_subscribe_t * subs;
snd_seq_port_subscribe_alloca(&subs);
snd_seq_addr_t sender;
snd_seq_addr_t dest;
/* the destination port is actually our local port */
sender.client = m_dest_addr_client;
sender.port = m_dest_addr_port;
dest.client = m_local_addr_client;
dest.port = m_local_addr_port;
/* set in and out ports */
snd_seq_port_subscribe_set_sender(subs, &sender);
snd_seq_port_subscribe_set_dest(subs, &dest);
/* use the master queue, and get ticks */
snd_seq_port_subscribe_set_queue(subs, m_queue);
snd_seq_port_subscribe_set_time_update(subs, 1);
/* subscribe */
result = snd_seq_subscribe_port(m_seq, subs);
if (result < 0)
{
fprintf
(
stderr, "snd_seq_connect_from(%d:%d) error\n",
m_dest_addr_client, m_dest_addr_port
);
return false;
}
#endif // HAVE_LIBASOUND
return true;
}
void MIDIOut::subscribeDevice(MIDIDevice* device)
{
snd_seq_port_subscribe_t* sub = NULL;
Q_ASSERT(device != NULL);
Q_ASSERT(m_address != NULL);
snd_seq_port_subscribe_alloca(&sub);
snd_seq_port_subscribe_set_sender(sub, m_address);
snd_seq_port_subscribe_set_dest(sub, device->address());
snd_seq_subscribe_port(m_alsa, sub);
}
/**
* \brief simple subscription (w/o exclusive & time conversion)
* \param seq sequencer handle
* \param myport the port id as sender
* \param dest_client destination client id
* \param dest_port destination port id
* \return 0 on success or negative error code
*
* Connect from the given receiver port in the current client
* to the given destination client:port.
*
* \sa snd_seq_subscribe_port(), snd_seq_disconnect_to()
*/
int snd_seq_connect_to(snd_seq_t *seq, int myport, int dest_client, int dest_port)
{
snd_seq_port_subscribe_t subs;
memset(&subs, 0, sizeof(subs));
/*subs.sender.client = seq->client;*/
subs.sender.client = snd_seq_client_id(seq);
subs.sender.port = myport;
subs.dest.client = dest_client;
subs.dest.port = dest_port;
return snd_seq_subscribe_port(seq, &subs);
}
void AlsaMidiInputThread::subscribeDevice(AlsaMidiInputDevice* device)
{
qDebug() << Q_FUNC_INFO;
Q_ASSERT(device != NULL);
/* Subscribe events coming from the the device's MIDI port to get
patched to the plugin's own MIDI port */
snd_seq_port_subscribe_t* sub = NULL;
snd_seq_port_subscribe_alloca(&sub);
snd_seq_port_subscribe_set_sender(sub, device->address());
snd_seq_port_subscribe_set_dest(sub, m_destinationAddress);
snd_seq_subscribe_port(m_alsa, sub);
}
/* Set up ALSA MIDI subscription according to supplied parameter. */
static int
subscribe(snd_seq_port_subscribe_t *sub)
{
if (snd_seq_get_port_subscription(seq, sub) == 0) {
dprintf("Connection between editor and device already established\n");
return 0;
}
if (snd_seq_subscribe_port(seq, sub) < 0) {
dprintf("Couldn't estabilsh connection between editor and device\n");
return -1;
}
return 0;
}
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;
}
bool AlsaMidiOutputDevice::open()
{
qDebug() << Q_FUNC_INFO;
m_open = true;
Q_ASSERT(m_sender_address != NULL);
Q_ASSERT(m_receiver_address != NULL);
/* Subscribe QLC+ ALSA client to the MIDI device */
snd_seq_port_subscribe_t* sub = NULL;
snd_seq_port_subscribe_alloca(&sub);
snd_seq_port_subscribe_set_sender(sub, m_sender_address);
snd_seq_port_subscribe_set_dest(sub, m_receiver_address);
snd_seq_subscribe_port(m_alsa, sub);
return true;
}
void MidiAlsaSeq::subscribeWritablePort( MidiPort * _port,
const QString & _dest,
bool _subscribe )
{
if( !m_portIDs.contains( _port ) )
{
return;
}
const int pid = m_portIDs[_port][1] < 0 ? m_portIDs[_port][0] :
m_portIDs[_port][1];
if( pid < 0 )
{
return;
}
m_seqMutex.lock();
snd_seq_addr_t dest;
if( snd_seq_parse_address( m_seqHandle, &dest,
_dest.section( ' ', 0, 0 ).toLatin1().constData() ) )
{
fprintf( stderr, "error parsing dest-address!\n" );
m_seqMutex.unlock();
return;
}
snd_seq_port_info_t * port_info;
snd_seq_port_info_malloc( &port_info );
snd_seq_get_port_info( m_seqHandle, pid, port_info );
const snd_seq_addr_t * sender = snd_seq_port_info_get_addr( port_info );
snd_seq_port_subscribe_t * subs;
snd_seq_port_subscribe_malloc( &subs );
snd_seq_port_subscribe_set_sender( subs, sender );
snd_seq_port_subscribe_set_dest( subs, &dest );
if( _subscribe )
{
snd_seq_subscribe_port( m_seqHandle, subs );
}
else
{
snd_seq_unsubscribe_port( m_seqHandle, subs );
}
snd_seq_port_subscribe_free( subs );
snd_seq_port_info_free( port_info );
m_seqMutex.unlock();
}
/* 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;
}
// Connection primitive.
bool qjackctlAlsaConnect::connectPorts (
qjackctlPortItem *pOPort, qjackctlPortItem *pIPort )
{
#ifdef CONFIG_ALSA_SEQ
qjackctlMainForm *pMainForm = qjackctlMainForm::getInstance();
if (pMainForm == NULL)
return false;
snd_seq_t *pAlsaSeq = pMainForm->alsaSeq();
if (pAlsaSeq == NULL)
return false;
qjackctlAlsaPort *pOAlsa = static_cast<qjackctlAlsaPort *> (pOPort);
qjackctlAlsaPort *pIAlsa = static_cast<qjackctlAlsaPort *> (pIPort);
snd_seq_port_subscribe_t *pAlsaSubs;
snd_seq_addr_t seq_addr;
snd_seq_port_subscribe_alloca(&pAlsaSubs);
seq_addr.client = pOAlsa->alsaClient();
seq_addr.port = pOAlsa->alsaPort();
snd_seq_port_subscribe_set_sender(pAlsaSubs, &seq_addr);
seq_addr.client = pIAlsa->alsaClient();
seq_addr.port = pIAlsa->alsaPort();
snd_seq_port_subscribe_set_dest(pAlsaSubs, &seq_addr);
return (snd_seq_subscribe_port(pAlsaSeq, pAlsaSubs) >= 0);
#else
return false;
#endif // CONFIG_ALSA_SEQ
}
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);
}
}
// MIDI Input(readable) / Output(writable) device connects.
bool qxgeditMidiDevice::connectDeviceList (
bool bReadable, const QStringList& list ) const
{
if (m_pAlsaSeq == NULL)
return false;
if (list.isEmpty())
return false;
snd_seq_addr_t seq_addr;
snd_seq_port_subscribe_t *pPortSubs;
snd_seq_port_subscribe_alloca(&pPortSubs);
snd_seq_client_info_t *pClientInfo;
snd_seq_port_info_t *pPortInfo;
snd_seq_client_info_alloca(&pClientInfo);
snd_seq_port_info_alloca(&pPortInfo);
unsigned int uiPortFlags;
if (bReadable)
uiPortFlags = SND_SEQ_PORT_CAP_READ | SND_SEQ_PORT_CAP_SUBS_READ;
else
uiPortFlags = SND_SEQ_PORT_CAP_WRITE | SND_SEQ_PORT_CAP_SUBS_WRITE;
int iConnects = 0;
while (snd_seq_query_next_client(m_pAlsaSeq, pClientInfo) >= 0) {
int iAlsaClient = snd_seq_client_info_get_client(pClientInfo);
if (iAlsaClient > 0 && iAlsaClient != m_iAlsaClient) {
QString sClientName = snd_seq_client_info_get_name(pClientInfo);
snd_seq_port_info_set_client(pPortInfo, iAlsaClient);
snd_seq_port_info_set_port(pPortInfo, -1);
while (snd_seq_query_next_port(m_pAlsaSeq, pPortInfo) >= 0) {
unsigned int uiPortCapability
= snd_seq_port_info_get_capability(pPortInfo);
if (((uiPortCapability & uiPortFlags) == uiPortFlags) &&
((uiPortCapability & SND_SEQ_PORT_CAP_NO_EXPORT) == 0)) {
int iAlsaPort = snd_seq_port_info_get_port(pPortInfo);
QString sPortName = snd_seq_port_info_get_name(pPortInfo);
QStringListIterator iter(list);
while (iter.hasNext()) {
const QString& sItem = iter.next();
const QString& sClientItem
= sItem.section(c_pszItemSep, 0, 0);
const QString& sPortItem
= sItem.section(c_pszItemSep, 1, 1);
if (sClientName != sClientItem.section(':', 1, 1))
continue;
if (sPortName != sPortItem .section(':', 1, 1))
continue;
if (bReadable) {
seq_addr.client = iAlsaClient;
seq_addr.port = iAlsaPort;
snd_seq_port_subscribe_set_sender(pPortSubs, &seq_addr);
seq_addr.client = m_iAlsaClient;
seq_addr.port = m_iAlsaPort;
snd_seq_port_subscribe_set_dest(pPortSubs, &seq_addr);
} else {
seq_addr.client = m_iAlsaClient;
seq_addr.port = m_iAlsaPort;
snd_seq_port_subscribe_set_sender(pPortSubs, &seq_addr);
seq_addr.client = iAlsaClient;
seq_addr.port = iAlsaPort;
snd_seq_port_subscribe_set_dest(pPortSubs, &seq_addr);
}
if (snd_seq_subscribe_port(m_pAlsaSeq, pPortSubs) == 0)
iConnects++;
}
}
}
}
}
return (iConnects > 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 midi_init() {
int rc;
snd_seq_port_info_t port;
snd_seq_port_subscribe_t sub;
int client;
if (midi_handle != NULL ) {
if (IS_MIDI_DEBUG_ON) {
g_print( "Reinitializing MIDI input\n");
}
if (midi_file_tag >= 0) {
gdk_input_remove( midi_file_tag);
midi_file_tag = -1;
}
close_handle( midi_handle);
midi_handle = NULL;
}
/* Open the sequencer device, in non-block mode.
Don't use O_NONBLOCK here, it crashes the application
as for ALSA 0.5.5. (LT 15-mar-2000) */
rc = snd_seq_open( &midi_handle, SND_SEQ_OPEN_IN);
if (rc < 0) {
g_warning( "error opening ALSA MIDI input stream (%s)\n",
snd_strerror(rc));
return;
}
/* Set nonblock mode i.e. enable==0. */
rc = snd_seq_block_mode( midi_handle, 0);
if (rc < 0) {
close_handle( midi_handle);
midi_handle = NULL;
g_warning( "error disabling sequencer block mode (%s)\n",
snd_strerror(rc));
return;
}
/* Get client id. Needed to subscribe to the kernel-level client. */
client = snd_seq_client_id( midi_handle);
if (client < 0) {
close_handle( midi_handle);
midi_handle = NULL;
g_warning( "error naming sequencer client (%s)\n", snd_strerror(client));
return;
}
/* Set client name. Visible with 'cat /proc/asound/seq/clients'. */
rc = set_seq_name( midi_handle);
if (rc < 0) {
close_handle( midi_handle);
midi_handle = NULL;
g_warning( "error naming sequencer client (%s)\n",snd_strerror(rc));
return;
}
/* Create a port for our user-level client. */
memset( &port, 0, sizeof(port));
strcpy( port.name, "tracker");
port.capability = SND_SEQ_PORT_CAP_READ | SND_SEQ_PORT_CAP_WRITE;
port.capability |= SND_SEQ_PORT_CAP_SUBS_WRITE; /* necessary??? */
port.type = SND_SEQ_PORT_TYPE_APPLICATION;
rc = snd_seq_create_port( midi_handle, &port);
if (rc < 0) {
close_handle( midi_handle);
midi_handle = NULL;
g_warning( "error creating sequencer port (%s)\n", snd_strerror(rc));
return;
}
/* Subscribe to the kernel client. */
memset( &sub, 0, sizeof(sub));
sub.sender.client = midi_settings.input.client;
sub.sender.port = midi_settings.input.port;
sub.dest.client = client;
sub.dest.port = port.port;
rc = snd_seq_subscribe_port( midi_handle, &sub);
if (rc < 0) {
close_handle( midi_handle);
midi_handle = NULL;
g_warning( "error subscribing to client %d port %d (%s)\n",
sub.sender.client, sub.sender.port, snd_strerror(rc));
return;
}
/* Install callback to process MIDI input. */
midi_file_tag = gdk_input_add( snd_seq_file_descriptor( midi_handle),
GDK_INPUT_READ,
(GdkInputFunction)midi_in_cb,
midi_handle);
if (midi_file_tag < 0) {
close_handle( midi_handle);
midi_handle = NULL;
g_warning( "error installing MIDI input callback (%s)\n",
g_strerror(midi_file_tag));
return;
}
if (IS_MIDI_DEBUG_ON) {
g_print( "MIDI input initialized\n");
}
return;
} /* midi_init() */
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;
}