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++/port.h"
37 #include "midi++/channel.h"
43 pthread_t Port::_process_thread;
44 Signal0<void> Port::JackHalted;
45 Signal0<void> Port::MakeConnections;
47 Port::Port (string const & name, Flags flags, jack_client_t* jack_client)
48 : PortBase (name, flags)
49 , _currently_in_cycle (false)
50 , _nframes_this_cycle (0)
51 , _jack_client (jack_client)
61 Port::Port (const XMLNode& node, jack_client_t* jack_client)
63 , _currently_in_cycle (false)
64 , _nframes_this_cycle (0)
65 , _jack_client (jack_client)
73 Descriptor desc (node);
75 init (desc.tag, desc.flags);
81 Port::init (string const & name, Flags flags)
83 PortBase::init (name, flags);
85 if (!create_port ()) {
89 MakeConnections.connect_same_thread (connect_connection, boost::bind (&Port::make_connections, this));
90 JackHalted.connect_same_thread (halt_connection, boost::bind (&Port::jack_halted, this));
96 for (int i = 0; i < 16; i++) {
102 jack_port_unregister (_jack_client, _jack_port);
109 Port::parse (framecnt_t timestamp)
113 /* NOTE: parsing is done (if at all) by initiating a read from
114 the port. Each port implementation calls on the parser
115 once it has data ready.
118 _parser->set_timestamp (timestamp);
122 // cerr << "+++ READ ON " << name() << endl;
124 int nread = read (buf, sizeof (buf));
126 // cerr << "-- READ (" << nread << " ON " << name() << endl;
129 if ((size_t) nread < sizeof (buf)) {
134 } else if (nread == 0) {
136 } else if (errno == EAGAIN) {
139 fatal << "Error reading from MIDI port " << name() << endmsg;
146 Port::cycle_start (pframes_t nframes)
150 _currently_in_cycle = true;
151 _nframes_this_cycle = nframes;
153 assert(_nframes_this_cycle == nframes);
155 if (sends_output()) {
156 void *buffer = jack_port_get_buffer (_jack_port, nframes);
157 jack_midi_clear_buffer (buffer);
161 if (receives_input()) {
162 void* jack_buffer = jack_port_get_buffer(_jack_port, nframes);
163 const pframes_t event_count = jack_midi_get_event_count(jack_buffer);
165 jack_midi_event_t ev;
166 timestamp_t cycle_start_frame = jack_last_frame_time (_jack_client);
168 for (pframes_t i = 0; i < event_count; ++i) {
169 jack_midi_event_get (&ev, jack_buffer, i);
170 input_fifo.write (cycle_start_frame + ev.time, (Evoral::EventType) 0, ev.size, ev.buffer);
182 if (sends_output()) {
183 flush (jack_port_get_buffer (_jack_port, _nframes_this_cycle));
186 _currently_in_cycle = false;
187 _nframes_this_cycle = 0;
198 Port::drain (int check_interval_usecs)
200 RingBuffer< Evoral::Event<double> >::rw_vector vec = { { 0, 0 }, { 0, 0} };
202 if (is_process_thread()) {
203 error << "Process thread called MIDI::Port::drain() - this cannot work" << endmsg;
208 output_fifo.get_write_vector (&vec);
209 if (vec.len[0] + vec.len[1] >= output_fifo.bufsize() - 1) {
212 usleep (check_interval_usecs);
217 Port::write(byte * msg, size_t msglen, timestamp_t timestamp)
221 if (!sends_output()) {
225 if (!is_process_thread()) {
227 Glib::Mutex::Lock lm (output_fifo_lock);
228 RingBuffer< Evoral::Event<double> >::rw_vector vec = { { 0, 0 }, { 0, 0} };
230 output_fifo.get_write_vector (&vec);
232 if (vec.len[0] + vec.len[1] < 1) {
233 error << "no space in FIFO for non-process thread MIDI write" << endmsg;
238 if (!vec.buf[0]->owns_buffer()) {
239 vec.buf[0]->set_buffer (0, 0, true);
241 vec.buf[0]->set (msg, msglen, timestamp);
243 if (!vec.buf[1]->owns_buffer()) {
244 vec.buf[1]->set_buffer (0, 0, true);
246 vec.buf[1]->set (msg, msglen, timestamp);
249 output_fifo.increment_write_idx (1);
257 // XXX This had to be temporarily commented out to make export work again
258 if (!(timestamp < _nframes_this_cycle)) {
259 std::cerr << "attempting to write MIDI event of " << msglen << " bytes at time "
260 << timestamp << " of " << _nframes_this_cycle
261 << " (this will not work - needs a code fix)"
265 if (_currently_in_cycle) {
266 if (timestamp == 0) {
267 timestamp = _last_write_timestamp;
270 if (jack_midi_event_write (jack_port_get_buffer (_jack_port, _nframes_this_cycle),
271 timestamp, msg, msglen) == 0) {
273 _last_write_timestamp = timestamp;
277 cerr << "write of " << msglen << " failed, port holds "
278 << jack_midi_get_event_count (jack_port_get_buffer (_jack_port, _nframes_this_cycle))
282 cerr << "write to JACK midi port failed: not currently in a process cycle." << endl;
283 PBD::stacktrace (cerr, 20);
287 if (ret > 0 && _parser) {
288 // ardour doesn't care about this and neither should your app, probably
289 // output_parser->raw_preparse (*output_parser, msg, ret);
290 for (int i = 0; i < ret; i++) {
291 _parser->scanner (msg[i]);
293 // ardour doesn't care about this and neither should your app, probably
294 // output_parser->raw_postparse (*output_parser, msg, ret);
301 Port::flush (void* jack_port_buffer)
303 RingBuffer< Evoral::Event<double> >::rw_vector vec = { { 0, 0 }, { 0, 0 } };
306 output_fifo.get_read_vector (&vec);
308 if (vec.len[0] + vec.len[1]) {
309 cerr << "Flush " << vec.len[0] + vec.len[1] << " events from non-process FIFO\n";
313 Evoral::Event<double>* evp = vec.buf[0];
315 for (size_t n = 0; n < vec.len[0]; ++n, ++evp) {
316 jack_midi_event_write (jack_port_buffer,
317 (timestamp_t) evp->time(), evp->buffer(), evp->size());
322 Evoral::Event<double>* evp = vec.buf[1];
324 for (size_t n = 0; n < vec.len[1]; ++n, ++evp) {
325 jack_midi_event_write (jack_port_buffer,
326 (timestamp_t) evp->time(), evp->buffer(), evp->size());
330 if ((written = vec.len[0] + vec.len[1]) != 0) {
331 output_fifo.increment_read_idx (written);
336 Port::read (byte *, size_t)
338 if (!receives_input()) {
343 Evoral::EventType type;
345 byte buffer[input_fifo.capacity()];
347 while (input_fifo.read (&time, &type, &size, buffer)) {
348 _parser->set_timestamp (time);
349 for (uint32_t i = 0; i < size; ++i) {
350 _parser->scanner (buffer[i]);
360 _jack_port = jack_port_register(_jack_client, _tagname.c_str(), JACK_DEFAULT_MIDI_TYPE, _flags, 0);
361 return _jack_port == 0 ? -1 : 0;
365 Port::get_state () const
367 XMLNode& root = PortBase::get_state ();
370 byte device_inquiry[6];
372 device_inquiry[0] = 0xf0;
373 device_inquiry[0] = 0x7e;
374 device_inquiry[0] = 0x7f;
375 device_inquiry[0] = 0x06;
376 device_inquiry[0] = 0x02;
377 device_inquiry[0] = 0xf7;
379 write (device_inquiry, sizeof (device_inquiry), 0);
384 const char** jc = jack_port_get_connections (_jack_port);
385 string connection_string;
387 for (int i = 0; jc[i]; ++i) {
389 connection_string += ',';
391 connection_string += jc[i];
396 if (!connection_string.empty()) {
397 root.add_property ("connections", connection_string);
400 if (!_connections.empty()) {
401 root.add_property ("connections", _connections);
409 Port::set_state (const XMLNode& node)
411 const XMLProperty* prop;
413 PortBase::set_state (node);
415 if ((prop = node.property ("connections")) != 0 && _jack_port) {
416 _connections = prop->value ();
421 Port::make_connections ()
423 if (!_connections.empty()) {
424 vector<string> ports;
425 split (_connections, ports, ',');
426 for (vector<string>::iterator x = ports.begin(); x != ports.end(); ++x) {
428 if (receives_input()) {
429 jack_connect (_jack_client, (*x).c_str(), jack_port_name (_jack_port));
431 jack_connect (_jack_client, jack_port_name (_jack_port), (*x).c_str());
433 /* ignore failures */
438 connect_connection.disconnect ();
442 Port::set_process_thread (pthread_t thr)
444 _process_thread = thr;
448 Port::is_process_thread()
450 return (pthread_self() == _process_thread);
454 Port::reestablish (jack_client_t* jack)
457 int const r = create_port ();
460 PBD::error << "could not reregister ports for " << name() << endmsg;