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;
46 string Port::state_node_name = "MIDI-port";
48 Port::Port (string const & name, Flags flags, jack_client_t* jack_client)
49 : _currently_in_cycle (false)
50 , _nframes_this_cycle (0)
51 , _jack_client (jack_client)
53 , _last_read_index (0)
58 , _centrally_parsed (true)
64 Port::Port (const XMLNode& node, jack_client_t* jack_client)
65 : _currently_in_cycle (false)
66 , _nframes_this_cycle (0)
67 , _jack_client (jack_client)
69 , _last_read_index (0)
73 , _centrally_parsed (true)
77 Descriptor desc (node);
79 init (desc.tag, desc.flags);
85 Port::init (string const & name, Flags flags)
87 _ok = false; /* derived class must set to true if constructor
96 _parser = new Parser (*this);
98 for (int i = 0; i < 16; i++) {
99 _channel[i] = new Channel (i, *this);
100 _channel[i]->connect_signals ();
103 if (!create_port ()) {
107 MakeConnections.connect_same_thread (connect_connection, boost::bind (&Port::make_connections, this));
108 JackHalted.connect_same_thread (halt_connection, boost::bind (&Port::jack_halted, this));
114 for (int i = 0; i < 16; i++) {
120 jack_port_unregister (_jack_client, _jack_port);
127 Port::parse (framecnt_t timestamp)
131 /* NOTE: parsing is done (if at all) by initiating a read from
132 the port. Each port implementation calls on the parser
133 once it has data ready.
136 _parser->set_timestamp (timestamp);
140 // cerr << "+++ READ ON " << name() << endl;
142 int nread = read (buf, sizeof (buf));
144 // cerr << "-- READ (" << nread << " ON " << name() << endl;
147 if ((size_t) nread < sizeof (buf)) {
152 } else if (nread == 0) {
154 } else if (errno == EAGAIN) {
157 fatal << "Error reading from MIDI port " << name() << endmsg;
163 /** Send a clock tick message.
164 * \return true on success.
167 Port::clock (timestamp_t timestamp)
169 static byte clockmsg = 0xf8;
171 if (sends_output()) {
172 return midimsg (&clockmsg, 1, timestamp);
179 Port::cycle_start (pframes_t nframes)
183 _currently_in_cycle = true;
184 _nframes_this_cycle = nframes;
186 assert(_nframes_this_cycle == nframes);
187 _last_read_index = 0;
188 _last_write_timestamp = 0;
190 if (sends_output()) {
191 void *buffer = jack_port_get_buffer (_jack_port, nframes);
192 jack_midi_clear_buffer (buffer);
196 if (receives_input()) {
197 void* jack_buffer = jack_port_get_buffer(_jack_port, nframes);
198 const pframes_t event_count = jack_midi_get_event_count(jack_buffer);
200 jack_midi_event_t ev;
201 timestamp_t cycle_start_frame = jack_last_frame_time (_jack_client);
203 for (pframes_t i = 0; i < event_count; ++i) {
204 jack_midi_event_get (&ev, jack_buffer, i);
205 input_fifo.write (cycle_start_frame + ev.time, (Evoral::EventType) 0, ev.size, ev.buffer);
217 if (sends_output()) {
218 flush (jack_port_get_buffer (_jack_port, _nframes_this_cycle));
221 _currently_in_cycle = false;
222 _nframes_this_cycle = 0;
225 std::ostream & MIDI::operator << ( std::ostream & os, const MIDI::Port & port )
228 os << "MIDI::Port { ";
229 os << "name: " << port.name();
231 os << "ok: " << port.ok();
237 Port::Descriptor::Descriptor (const XMLNode& node)
239 const XMLProperty *prop;
240 bool have_tag = false;
241 bool have_mode = false;
243 if ((prop = node.property ("tag")) != 0) {
248 if ((prop = node.property ("mode")) != 0) {
250 if (strings_equal_ignore_case (prop->value(), "output") || strings_equal_ignore_case (prop->value(), "out")) {
252 } else if (strings_equal_ignore_case (prop->value(), "input") || strings_equal_ignore_case (prop->value(), "in")) {
259 if (!have_tag || !have_mode) {
260 throw failed_constructor();
272 Port::write(byte * msg, size_t msglen, timestamp_t timestamp)
276 if (!sends_output()) {
280 if (!is_process_thread()) {
282 Glib::Mutex::Lock lm (output_fifo_lock);
283 RingBuffer< Evoral::Event<double> >::rw_vector vec = { { 0, 0 }, { 0, 0} };
285 output_fifo.get_write_vector (&vec);
287 if (vec.len[0] + vec.len[1] < 1) {
288 error << "no space in FIFO for non-process thread MIDI write" << endmsg;
293 if (!vec.buf[0]->owns_buffer()) {
294 vec.buf[0]->set_buffer (0, 0, true);
296 vec.buf[0]->set (msg, msglen, timestamp);
298 if (!vec.buf[1]->owns_buffer()) {
299 vec.buf[1]->set_buffer (0, 0, true);
301 vec.buf[1]->set (msg, msglen, timestamp);
304 output_fifo.increment_write_idx (1);
310 // XXX This had to be temporarily commented out to make export work again
311 if (!(timestamp < _nframes_this_cycle)) {
312 std::cerr << "attempting to write MIDI event of " << msglen << " bytes at time "
313 << timestamp << " of " << _nframes_this_cycle
314 << " (this will not work - needs a code fix)"
318 if (_currently_in_cycle) {
319 if (timestamp == 0) {
320 timestamp = _last_write_timestamp;
323 if (jack_midi_event_write (jack_port_get_buffer (_jack_port, _nframes_this_cycle),
324 timestamp, msg, msglen) == 0) {
326 _last_write_timestamp = timestamp;
330 cerr << "write of " << msglen << " failed, port holds "
331 << jack_midi_get_event_count (jack_port_get_buffer (_jack_port, _nframes_this_cycle))
335 cerr << "write to JACK midi port failed: not currently in a process cycle." << endl;
336 PBD::stacktrace (cerr, 20);
340 if (ret > 0 && _parser) {
341 // ardour doesn't care about this and neither should your app, probably
342 // output_parser->raw_preparse (*output_parser, msg, ret);
343 for (int i = 0; i < ret; i++) {
344 _parser->scanner (msg[i]);
346 // ardour doesn't care about this and neither should your app, probably
347 // output_parser->raw_postparse (*output_parser, msg, ret);
354 Port::flush (void* jack_port_buffer)
356 RingBuffer< Evoral::Event<double> >::rw_vector vec = { { 0, 0 }, { 0, 0 } };
359 output_fifo.get_read_vector (&vec);
361 if (vec.len[0] + vec.len[1]) {
362 // cerr << "Flush " << vec.len[0] + vec.len[1] << " events from non-process FIFO\n";
366 Evoral::Event<double>* evp = vec.buf[0];
368 for (size_t n = 0; n < vec.len[0]; ++n, ++evp) {
369 jack_midi_event_write (jack_port_buffer,
370 (timestamp_t) evp->time(), evp->buffer(), evp->size());
375 Evoral::Event<double>* evp = vec.buf[1];
377 for (size_t n = 0; n < vec.len[1]; ++n, ++evp) {
378 jack_midi_event_write (jack_port_buffer,
379 (timestamp_t) evp->time(), evp->buffer(), evp->size());
383 if ((written = vec.len[0] + vec.len[1]) != 0) {
384 output_fifo.increment_read_idx (written);
389 Port::read (byte *, size_t)
391 if (!receives_input()) {
396 Evoral::EventType type;
398 byte buffer[input_fifo.capacity()];
400 while (input_fifo.read (&time, &type, &size, buffer)) {
401 _parser->set_timestamp (time);
402 for (uint32_t i = 0; i < size; ++i) {
403 _parser->scanner (buffer[i]);
413 _jack_port = jack_port_register(_jack_client, _tagname.c_str(), JACK_DEFAULT_MIDI_TYPE, _flags, 0);
414 return _jack_port == 0 ? -1 : 0;
418 Port::get_state () const
420 XMLNode* root = new XMLNode (state_node_name);
421 root->add_property ("tag", _tagname);
423 if (_flags == IsInput) {
424 root->add_property ("mode", "input");
426 root->add_property ("mode", "output");
430 byte device_inquiry[6];
432 device_inquiry[0] = 0xf0;
433 device_inquiry[0] = 0x7e;
434 device_inquiry[0] = 0x7f;
435 device_inquiry[0] = 0x06;
436 device_inquiry[0] = 0x02;
437 device_inquiry[0] = 0xf7;
439 write (device_inquiry, sizeof (device_inquiry), 0);
444 const char** jc = jack_port_get_connections (_jack_port);
445 string connection_string;
447 for (int i = 0; jc[i]; ++i) {
449 connection_string += ',';
451 connection_string += jc[i];
456 if (!connection_string.empty()) {
457 root->add_property ("connections", connection_string);
460 if (!_connections.empty()) {
461 root->add_property ("connections", _connections);
469 Port::set_state (const XMLNode& node)
471 const XMLProperty* prop;
473 if ((prop = node.property ("tag")) == 0 || prop->value() != _tagname) {
477 if ((prop = node.property ("connections")) != 0 && _jack_port) {
478 _connections = prop->value ();
483 Port::make_connections ()
485 if (!_connections.empty()) {
486 vector<string> ports;
487 split (_connections, ports, ',');
488 for (vector<string>::iterator x = ports.begin(); x != ports.end(); ++x) {
490 if (receives_input()) {
491 jack_connect (_jack_client, (*x).c_str(), jack_port_name (_jack_port));
493 jack_connect (_jack_client, jack_port_name (_jack_port), (*x).c_str());
495 /* ignore failures */
500 connect_connection.disconnect ();
504 Port::set_process_thread (pthread_t thr)
506 _process_thread = thr;
510 Port::is_process_thread()
512 return (pthread_self() == _process_thread);
516 Port::reestablish (jack_client_t* jack)
519 int const r = create_port ();
522 PBD::error << "could not reregister ports for " << name() << endmsg;