2 Copyright (C) 2006 Paul Davis
3 Written by Dave Robillard
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 #include <pbd/error.h>
26 #include <midi++/types.h>
27 #include <midi++/jack.h>
33 pthread_t JACK_MidiPort::_process_thread;
35 JACK_MidiPort::JACK_MidiPort(const XMLNode& node, jack_client_t* jack_client)
37 , _jack_client(jack_client)
38 , _jack_input_port(NULL)
39 , _jack_output_port(NULL)
41 , non_process_thread_fifo (512)
43 int err = create_ports (node);
50 JACK_MidiPort::~JACK_MidiPort()
56 JACK_MidiPort::cycle_start (nframes_t nframes)
58 Port::cycle_start(nframes);
59 assert(_nframes_this_cycle == nframes);
61 _last_write_timestamp = 0;
63 void *buffer = jack_port_get_buffer (_jack_output_port, nframes);
64 jack_midi_clear_buffer (buffer);
69 JACK_MidiPort::write(byte * msg, size_t msglen, timestamp_t timestamp)
73 if (!is_process_thread()) {
75 Glib::Mutex::Lock lm (non_process_thread_fifo_lock);
76 RingBuffer<Event>::rw_vector vec;
78 non_process_thread_fifo.get_write_vector (&vec);
80 if (vec.len[0] + vec.len[1] < 1) {
81 error << "no space in FIFO for non-process thread MIDI write"
87 vec.buf[0]->set (msg, msglen, timestamp);
89 vec.buf[1]->set (msg, msglen, timestamp);
92 non_process_thread_fifo.increment_write_idx (1);
98 assert(_jack_output_port);
99 assert(timestamp < _nframes_this_cycle);
101 if (_currently_in_cycle) {
102 if (timestamp == 0) {
103 timestamp = _last_write_timestamp;
106 if (jack_midi_event_write (jack_port_get_buffer (_jack_output_port, _nframes_this_cycle),
107 timestamp, msg, msglen) == 0) {
109 _last_write_timestamp = timestamp;
113 cerr << "write of " << msglen << " failed, port holds "
114 << jack_midi_get_event_count (jack_port_get_buffer (_jack_output_port, _nframes_this_cycle))
118 cerr << "write to JACK midi port failed: not currently in a process cycle." << endl;
122 if (ret > 0 && output_parser) {
123 output_parser->raw_preparse (*output_parser, msg, ret);
124 for (int i = 0; i < ret; i++) {
125 output_parser->scanner (msg[i]);
127 output_parser->raw_postparse (*output_parser, msg, ret);
134 JACK_MidiPort::flush (void* jack_port_buffer)
136 RingBuffer<Event>::rw_vector vec;
139 non_process_thread_fifo.get_read_vector (&vec);
141 if (vec.len[0] + vec.len[1]) {
142 cerr << "Flush " << vec.len[0] + vec.len[1] << " events from non-process FIFO\n";
146 Event* evp = vec.buf[0];
148 for (size_t n = 0; n < vec.len[0]; ++n, ++evp) {
149 jack_midi_event_write (jack_port_buffer,
150 (timestamp_t) evp->time(), evp->buffer(), evp->size());
155 Event* evp = vec.buf[1];
157 for (size_t n = 0; n < vec.len[1]; ++n, ++evp) {
158 jack_midi_event_write (jack_port_buffer,
159 (timestamp_t) evp->time(), evp->buffer(), evp->size());
163 if ((written = vec.len[0] + vec.len[1]) != 0) {
164 non_process_thread_fifo.increment_read_idx (written);
169 JACK_MidiPort::read(byte * buf, size_t bufsize)
171 assert(_currently_in_cycle);
172 assert(_jack_input_port);
174 jack_midi_event_t ev;
176 int err = jack_midi_event_get (&ev,
177 jack_port_get_buffer(_jack_input_port, _nframes_this_cycle),
180 // XXX this doesn't handle ev.size > max
183 size_t limit = min (bufsize, ev.size);
184 memcpy(buf, ev.buffer, limit);
187 input_parser->raw_preparse (*input_parser, buf, limit);
188 for (size_t i = 0; i < limit; i++) {
189 input_parser->scanner (buf[i]);
191 input_parser->raw_postparse (*input_parser, buf, limit);
201 JACK_MidiPort::create_ports(const XMLNode& node)
203 Descriptor desc (node);
205 assert(!_jack_input_port);
206 assert(!_jack_output_port);
208 jack_nframes_t nframes = jack_get_buffer_size(_jack_client);
212 if (desc.mode == O_RDWR || desc.mode == O_WRONLY) {
213 _jack_output_port = jack_port_register(_jack_client,
214 string(desc.tag).append("_out").c_str(),
215 JACK_DEFAULT_MIDI_TYPE, JackPortIsOutput, 0);
216 jack_midi_clear_buffer(jack_port_get_buffer(_jack_output_port, nframes));
217 ret = ret && (_jack_output_port != NULL);
220 if (desc.mode == O_RDWR || desc.mode == O_RDONLY) {
221 _jack_input_port = jack_port_register(_jack_client,
222 string(desc.tag).append("_in").c_str(),
223 JACK_DEFAULT_MIDI_TYPE, JackPortIsInput, 0);
224 jack_midi_clear_buffer(jack_port_get_buffer(_jack_input_port, nframes));
225 ret = ret && (_jack_input_port != NULL);
232 JACK_MidiPort::get_state () const
234 XMLNode& root (Port::get_state ());
239 JACK_MidiPort::set_state (const XMLNode& node)
244 JACK_MidiPort::set_process_thread (pthread_t thr)
246 _process_thread = thr;
250 JACK_MidiPort::is_process_thread()
252 return (pthread_self() == _process_thread);