2 Copyright (C) 1998 Paul Barton-Davis
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 #include <jack/jack.h>
26 #include <jack/midiport.h>
28 #include "pbd/xml++.h"
29 #include "pbd/error.h"
30 #include "pbd/failed_constructor.h"
31 #include "pbd/convert.h"
32 #include "pbd/strsplit.h"
33 #include "pbd/stacktrace.h"
35 #include "midi++/types.h"
36 #include "midi++/jack_midi_port.h"
37 #include "midi++/channel.h"
44 template class EventRingBuffer<timestamp_t>;
47 pthread_t JackMIDIPort::_process_thread;
48 Signal0<void> JackMIDIPort::JackHalted;
49 Signal0<void> JackMIDIPort::MakeConnections;
51 JackMIDIPort::JackMIDIPort (string const & name, Flags flags, jack_client_t* jack_client)
53 , _currently_in_cycle (false)
54 , _nframes_this_cycle (0)
55 , _jack_client (jack_client)
57 , _last_write_timestamp (0)
66 JackMIDIPort::JackMIDIPort (const XMLNode& node, jack_client_t* jack_client)
68 , _currently_in_cycle (false)
69 , _nframes_this_cycle (0)
70 , _jack_client (jack_client)
72 , _last_write_timestamp (0)
79 Descriptor desc (node);
80 init (desc.tag, desc.flags);
85 JackMIDIPort::init (const string& /*name*/, Flags /*flags*/)
87 if (!create_port ()) {
91 MakeConnections.connect_same_thread (connect_connection, boost::bind (&JackMIDIPort::make_connections, this));
92 JackHalted.connect_same_thread (halt_connection, boost::bind (&JackMIDIPort::jack_halted, this));
96 JackMIDIPort::~JackMIDIPort ()
100 jack_port_unregister (_jack_client, _jack_port);
107 JackMIDIPort::parse (framecnt_t timestamp)
111 /* NOTE: parsing is done (if at all) by initiating a read from
112 the port. Each port implementation calls on the parser
113 once it has data ready.
116 _parser->set_timestamp (timestamp);
120 // cerr << "+++ READ ON " << name() << endl;
122 int nread = read (buf, sizeof (buf));
124 // cerr << "-- READ (" << nread << " ON " << name() << endl;
127 if ((size_t) nread < sizeof (buf)) {
132 } else if (nread == 0) {
134 } else if (errno == EAGAIN) {
137 fatal << "Error reading from MIDI port " << name() << endmsg;
144 JackMIDIPort::cycle_start (pframes_t nframes)
148 _currently_in_cycle = true;
149 _nframes_this_cycle = nframes;
151 assert(_nframes_this_cycle == nframes);
153 if (sends_output()) {
154 void *buffer = jack_port_get_buffer (_jack_port, nframes);
155 jack_midi_clear_buffer (buffer);
159 if (receives_input()) {
160 void* jack_buffer = jack_port_get_buffer(_jack_port, nframes);
161 const pframes_t event_count = jack_midi_get_event_count(jack_buffer);
163 jack_midi_event_t ev;
164 timestamp_t cycle_start_frame = jack_last_frame_time (_jack_client);
166 for (pframes_t i = 0; i < event_count; ++i) {
167 jack_midi_event_get (&ev, jack_buffer, i);
168 input_fifo.write (cycle_start_frame + ev.time, (Evoral::EventType) 0, ev.size, ev.buffer);
178 JackMIDIPort::cycle_end ()
180 if (sends_output()) {
181 flush (jack_port_get_buffer (_jack_port, _nframes_this_cycle));
184 _currently_in_cycle = false;
185 _nframes_this_cycle = 0;
189 JackMIDIPort::jack_halted ()
196 JackMIDIPort::drain (int check_interval_usecs)
198 RingBuffer< Evoral::Event<double> >::rw_vector vec = { { 0, 0 }, { 0, 0} };
200 if (is_process_thread()) {
201 error << "Process thread called MIDI::JackMIDIPort::drain() - this cannot work" << endmsg;
206 output_fifo.get_write_vector (&vec);
207 if (vec.len[0] + vec.len[1] >= output_fifo.bufsize() - 1) {
210 usleep (check_interval_usecs);
215 JackMIDIPort::write (const byte * msg, size_t msglen, timestamp_t timestamp)
219 if (!_jack_client || !_jack_port) {
220 /* poof ! make it just vanish into thin air, since we are no
221 longer connected to JACK.
226 if (!sends_output()) {
230 if (!is_process_thread()) {
232 Glib::Threads::Mutex::Lock lm (output_fifo_lock);
233 RingBuffer< Evoral::Event<double> >::rw_vector vec = { { 0, 0 }, { 0, 0} };
235 output_fifo.get_write_vector (&vec);
237 if (vec.len[0] + vec.len[1] < 1) {
238 error << "no space in FIFO for non-process thread MIDI write" << endmsg;
243 if (!vec.buf[0]->owns_buffer()) {
244 vec.buf[0]->set_buffer (0, 0, true);
246 vec.buf[0]->set (msg, msglen, timestamp);
248 if (!vec.buf[1]->owns_buffer()) {
249 vec.buf[1]->set_buffer (0, 0, true);
251 vec.buf[1]->set (msg, msglen, timestamp);
254 output_fifo.increment_write_idx (1);
260 if (timestamp >= _nframes_this_cycle) {
261 std::cerr << "attempting to write MIDI event of " << msglen << " bytes at time "
262 << timestamp << " of " << _nframes_this_cycle
263 << " (this will not work - needs a code fix)"
267 if (_currently_in_cycle) {
268 if (timestamp == 0) {
269 timestamp = _last_write_timestamp;
272 if ((ret = jack_midi_event_write (jack_port_get_buffer (_jack_port, _nframes_this_cycle),
273 timestamp, msg, msglen)) == 0) {
275 _last_write_timestamp = timestamp;
278 cerr << "write of " << msglen << " @ " << timestamp << " failed, port holds "
279 << jack_midi_get_event_count (jack_port_get_buffer (_jack_port, _nframes_this_cycle))
280 << " port is " << _jack_port
281 << " ntf = " << _nframes_this_cycle
282 << " buf = " << jack_port_get_buffer (_jack_port, _nframes_this_cycle)
285 PBD::stacktrace (cerr, 20);
289 cerr << "write to JACK midi port failed: not currently in a process cycle." << endl;
290 PBD::stacktrace (cerr, 20);
294 if (ret > 0 && _parser) {
295 // ardour doesn't care about this and neither should your app, probably
296 // output_parser->raw_preparse (*output_parser, msg, ret);
297 for (int i = 0; i < ret; i++) {
298 _parser->scanner (msg[i]);
300 // ardour doesn't care about this and neither should your app, probably
301 // output_parser->raw_postparse (*output_parser, msg, ret);
308 JackMIDIPort::flush (void* jack_port_buffer)
310 RingBuffer< Evoral::Event<double> >::rw_vector vec = { { 0, 0 }, { 0, 0 } };
313 output_fifo.get_read_vector (&vec);
315 if (vec.len[0] + vec.len[1]) {
316 // cerr << "Flush " << vec.len[0] + vec.len[1] << " events from non-process FIFO\n";
320 Evoral::Event<double>* evp = vec.buf[0];
322 for (size_t n = 0; n < vec.len[0]; ++n, ++evp) {
323 jack_midi_event_write (jack_port_buffer,
324 (timestamp_t) evp->time(), evp->buffer(), evp->size());
329 Evoral::Event<double>* evp = vec.buf[1];
331 for (size_t n = 0; n < vec.len[1]; ++n, ++evp) {
332 jack_midi_event_write (jack_port_buffer,
333 (timestamp_t) evp->time(), evp->buffer(), evp->size());
337 if ((written = vec.len[0] + vec.len[1]) != 0) {
338 output_fifo.increment_read_idx (written);
343 JackMIDIPort::read (byte *, size_t)
345 if (!receives_input()) {
350 Evoral::EventType type;
352 byte buffer[input_fifo.capacity()];
354 while (input_fifo.read (&time, &type, &size, buffer)) {
355 _parser->set_timestamp (time);
356 for (uint32_t i = 0; i < size; ++i) {
357 _parser->scanner (buffer[i]);
365 JackMIDIPort::create_port ()
367 _jack_port = jack_port_register(_jack_client, _tagname.c_str(), JACK_DEFAULT_MIDI_TYPE, _flags, 0);
368 return _jack_port == 0 ? -1 : 0;
372 JackMIDIPort::get_state () const
374 XMLNode& root = Port::get_state ();
377 byte device_inquiry[6];
379 device_inquiry[0] = 0xf0;
380 device_inquiry[0] = 0x7e;
381 device_inquiry[0] = 0x7f;
382 device_inquiry[0] = 0x06;
383 device_inquiry[0] = 0x02;
384 device_inquiry[0] = 0xf7;
386 write (device_inquiry, sizeof (device_inquiry), 0);
391 const char** jc = jack_port_get_connections (_jack_port);
392 string connection_string;
394 for (int i = 0; jc[i]; ++i) {
396 connection_string += ',';
398 connection_string += jc[i];
403 if (!connection_string.empty()) {
404 root.add_property ("connections", connection_string);
407 if (!_connections.empty()) {
408 root.add_property ("connections", _connections);
416 JackMIDIPort::set_state (const XMLNode& node)
418 const XMLProperty* prop;
420 if ((prop = node.property ("tag")) == 0 || prop->value() != _tagname) {
424 Port::set_state (node);
426 if ((prop = node.property ("connections")) != 0) {
427 _connections = prop->value ();
432 JackMIDIPort::make_connections ()
434 if (!_connections.empty()) {
435 vector<string> ports;
436 split (_connections, ports, ',');
437 for (vector<string>::iterator x = ports.begin(); x != ports.end(); ++x) {
439 if (receives_input()) {
440 jack_connect (_jack_client, (*x).c_str(), jack_port_name (_jack_port));
442 jack_connect (_jack_client, jack_port_name (_jack_port), (*x).c_str());
444 /* ignore failures */
449 connect_connection.disconnect ();
453 JackMIDIPort::set_process_thread (pthread_t thr)
455 _process_thread = thr;
459 JackMIDIPort::is_process_thread()
461 return (pthread_equal(pthread_self(), _process_thread));
465 JackMIDIPort::reestablish (jack_client_t* jack)
468 int const r = create_port ();
471 PBD::error << "could not reregister ports for " << name() << endmsg;
476 JackMIDIPort::reconnect ()