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"
34 #include "midi++/types.h"
35 #include "midi++/port.h"
36 #include "midi++/channel.h"
42 pthread_t Port::_process_thread;
43 Signal0<void> Port::JackHalted;
44 Signal0<void> Port::MakeConnections;
46 Port::Port (string const & name, Flags flags, jack_client_t* jack_client)
47 : _currently_in_cycle (false)
48 , _nframes_this_cycle (0)
49 , _jack_client (jack_client)
51 , _last_read_index (0)
59 Port::Port (const XMLNode& node, jack_client_t* jack_client)
60 : _currently_in_cycle (false)
61 , _nframes_this_cycle (0)
62 , _jack_client (jack_client)
64 , _last_read_index (0)
68 Descriptor desc (node);
70 init (desc.tag, desc.flags);
76 Port::init (string const & name, Flags flags)
78 _ok = false; /* derived class must set to true if constructor
87 _parser = new Parser (*this);
89 for (int i = 0; i < 16; i++) {
90 _channel[i] = new Channel (i, *this);
91 _channel[i]->connect_signals ();
94 if (!create_port ()) {
98 MakeConnections.connect_same_thread (connect_connection, boost::bind (&Port::make_connections, this));
99 JackHalted.connect_same_thread (halt_connection, boost::bind (&Port::jack_halted, this));
105 for (int i = 0; i < 16; i++) {
110 if (_jack_client && _jack_port) {
111 jack_port_unregister (_jack_client, _jack_port);
118 Port::parse (nframes_t timestamp)
122 /* NOTE: parsing is done (if at all) by initiating a read from
123 the port. Each port implementation calls on the parser
124 once it has data ready.
127 _parser->set_timestamp (timestamp);
131 // cerr << "+++ READ ON " << name() << endl;
133 int nread = read (buf, sizeof (buf));
135 // cerr << "-- READ (" << nread << " ON " << name() << endl;
138 if ((size_t) nread < sizeof (buf)) {
143 } else if (nread == 0) {
145 } else if (errno == EAGAIN) {
148 fatal << "Error reading from MIDI port " << name() << endmsg;
154 /** Send a clock tick message.
155 * \return true on success.
158 Port::clock (timestamp_t timestamp)
160 static byte clockmsg = 0xf8;
162 if (sends_output()) {
163 return midimsg (&clockmsg, 1, timestamp);
170 Port::cycle_start (nframes_t nframes)
172 _currently_in_cycle = true;
173 _nframes_this_cycle = nframes;
175 assert(_nframes_this_cycle == nframes);
176 _last_read_index = 0;
177 _last_write_timestamp = 0;
179 if (sends_output()) {
180 void *buffer = jack_port_get_buffer (_jack_port, nframes);
181 jack_midi_clear_buffer (buffer);
185 if (receives_input()) {
186 void* jack_buffer = jack_port_get_buffer(_jack_port, nframes);
187 const nframes_t event_count = jack_midi_get_event_count(jack_buffer);
189 jack_midi_event_t ev;
190 timestamp_t cycle_start_frame = jack_last_frame_time (_jack_client);
192 for (nframes_t i = 0; i < event_count; ++i) {
193 jack_midi_event_get (&ev, jack_buffer, i);
194 input_fifo.write (cycle_start_frame + ev.time, (Evoral::EventType) 0, ev.size, ev.buffer);
206 if (sends_output()) {
207 flush (jack_port_get_buffer (_jack_port, _nframes_this_cycle));
210 _currently_in_cycle = false;
211 _nframes_this_cycle = 0;
214 std::ostream & MIDI::operator << ( std::ostream & os, const MIDI::Port & port )
217 os << "MIDI::Port { ";
218 os << "name: " << port.name();
220 os << "ok: " << port.ok();
226 Port::Descriptor::Descriptor (const XMLNode& node)
228 const XMLProperty *prop;
229 bool have_tag = false;
230 bool have_mode = false;
232 if ((prop = node.property ("tag")) != 0) {
237 if ((prop = node.property ("mode")) != 0) {
239 if (strings_equal_ignore_case (prop->value(), "output") || strings_equal_ignore_case (prop->value(), "out")) {
241 } else if (strings_equal_ignore_case (prop->value(), "input") || strings_equal_ignore_case (prop->value(), "in")) {
248 if (!have_tag || !have_mode) {
249 throw failed_constructor();
261 Port::write(byte * msg, size_t msglen, timestamp_t timestamp)
265 if (!sends_output()) {
269 if (!is_process_thread()) {
271 Glib::Mutex::Lock lm (output_fifo_lock);
272 RingBuffer< Evoral::Event<double> >::rw_vector vec = { { 0, 0 }, { 0, 0} };
274 output_fifo.get_write_vector (&vec);
276 if (vec.len[0] + vec.len[1] < 1) {
277 error << "no space in FIFO for non-process thread MIDI write" << endmsg;
282 if (!vec.buf[0]->owns_buffer()) {
283 vec.buf[0]->set_buffer (0, 0, true);
285 vec.buf[0]->set (msg, msglen, timestamp);
287 if (!vec.buf[1]->owns_buffer()) {
288 vec.buf[1]->set_buffer (0, 0, true);
290 vec.buf[1]->set (msg, msglen, timestamp);
293 output_fifo.increment_write_idx (1);
299 // XXX This had to be temporarily commented out to make export work again
300 if (!(timestamp < _nframes_this_cycle)) {
301 std::cerr << "assertion timestamp < _nframes_this_cycle failed!" << std::endl;
304 if (_currently_in_cycle) {
305 if (timestamp == 0) {
306 timestamp = _last_write_timestamp;
309 if (jack_midi_event_write (jack_port_get_buffer (_jack_port, _nframes_this_cycle),
310 timestamp, msg, msglen) == 0) {
312 _last_write_timestamp = timestamp;
316 cerr << "write of " << msglen << " failed, port holds "
317 << jack_midi_get_event_count (jack_port_get_buffer (_jack_port, _nframes_this_cycle))
321 cerr << "write to JACK midi port failed: not currently in a process cycle." << endl;
325 if (ret > 0 && _parser) {
326 // ardour doesn't care about this and neither should your app, probably
327 // output_parser->raw_preparse (*output_parser, msg, ret);
328 for (int i = 0; i < ret; i++) {
329 _parser->scanner (msg[i]);
331 // ardour doesn't care about this and neither should your app, probably
332 // output_parser->raw_postparse (*output_parser, msg, ret);
339 Port::flush (void* jack_port_buffer)
341 RingBuffer< Evoral::Event<double> >::rw_vector vec = { { 0, 0 }, { 0, 0 } };
344 output_fifo.get_read_vector (&vec);
346 if (vec.len[0] + vec.len[1]) {
347 // cerr << "Flush " << vec.len[0] + vec.len[1] << " events from non-process FIFO\n";
351 Evoral::Event<double>* evp = vec.buf[0];
353 for (size_t n = 0; n < vec.len[0]; ++n, ++evp) {
354 jack_midi_event_write (jack_port_buffer,
355 (timestamp_t) evp->time(), evp->buffer(), evp->size());
360 Evoral::Event<double>* evp = vec.buf[1];
362 for (size_t n = 0; n < vec.len[1]; ++n, ++evp) {
363 jack_midi_event_write (jack_port_buffer,
364 (timestamp_t) evp->time(), evp->buffer(), evp->size());
368 if ((written = vec.len[0] + vec.len[1]) != 0) {
369 output_fifo.increment_read_idx (written);
374 Port::read (byte *, size_t)
376 if (!receives_input()) {
381 Evoral::EventType type;
383 byte buffer[input_fifo.capacity()];
385 while (input_fifo.read (&time, &type, &size, buffer)) {
386 _parser->set_timestamp (time);
387 for (uint32_t i = 0; i < size; ++i) {
388 _parser->scanner (buffer[i]);
398 _jack_port = jack_port_register(_jack_client, _tagname.c_str(), JACK_DEFAULT_MIDI_TYPE, _flags, 0);
400 jack_midi_clear_buffer (jack_port_get_buffer (_jack_port, jack_get_buffer_size (_jack_client)));
403 return _jack_port == 0 ? -1 : 0;
407 Port::get_state () const
409 XMLNode* root = new XMLNode ("MIDI-port");
410 root->add_property ("tag", _tagname);
412 if (_flags == IsInput) {
413 root->add_property ("mode", "input");
415 root->add_property ("mode", "output");
419 byte device_inquiry[6];
421 device_inquiry[0] = 0xf0;
422 device_inquiry[0] = 0x7e;
423 device_inquiry[0] = 0x7f;
424 device_inquiry[0] = 0x06;
425 device_inquiry[0] = 0x02;
426 device_inquiry[0] = 0xf7;
428 write (device_inquiry, sizeof (device_inquiry), 0);
433 const char** jc = jack_port_get_connections (_jack_port);
434 string connection_string;
436 for (int i = 0; jc[i]; ++i) {
438 connection_string += ',';
440 connection_string += jc[i];
445 if (!connection_string.empty()) {
446 root->add_property ("connections", connection_string);
449 if (!_connections.empty()) {
450 root->add_property ("connections", _connections);
458 Port::set_state (const XMLNode& node)
460 const XMLProperty* prop;
462 if ((prop = node.property ("connections")) != 0 && _jack_port) {
463 _connections = prop->value ();
468 Port::make_connections ()
470 if (!_connections.empty()) {
471 vector<string> ports;
472 split (_connections, ports, ',');
473 for (vector<string>::iterator x = ports.begin(); x != ports.end(); ++x) {
475 if (receives_input()) {
476 jack_connect (_jack_client, (*x).c_str(), jack_port_name (_jack_port));
478 jack_connect (_jack_client, jack_port_name (_jack_port), (*x).c_str());
480 /* ignore failures */
485 connect_connection.disconnect ();
489 Port::set_process_thread (pthread_t thr)
491 _process_thread = thr;
495 Port::is_process_thread()
497 return (pthread_self() == _process_thread);
501 Port::reestablish (void* jack)
503 _jack_client = static_cast<jack_client_t*> (jack);
504 int const r = create_port ();
507 PBD::error << "could not reregister ports for " << name() << endmsg;