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);
62 void *buffer = jack_port_get_buffer (_jack_output_port, nframes);
63 jack_midi_clear_buffer (buffer);
68 JACK_MidiPort::write(byte * msg, size_t msglen, timestamp_t timestamp)
70 if (!is_process_thread()) {
72 Glib::Mutex::Lock lm (non_process_thread_fifo_lock);
73 RingBuffer<Event>::rw_vector vec;
75 non_process_thread_fifo.get_write_vector (&vec);
77 cerr << "Non-process thread writes " << msglen << " to " << name() << endl;
79 if (vec.len[0] + vec.len[1] < 1) {
80 error << "no space in FIFO for non-process thread MIDI write"
86 vec.buf[0]->set (msg, msglen, timestamp);
88 vec.buf[1]->set (msg, msglen, timestamp);
91 non_process_thread_fifo.increment_write_idx (1);
97 assert(_currently_in_cycle);
98 assert(timestamp < _nframes_this_cycle);
99 assert(_jack_output_port);
101 // FIXME: return value correct?
102 return jack_midi_event_write (jack_port_get_buffer (_jack_output_port, _nframes_this_cycle),
103 timestamp, msg, msglen);
108 JACK_MidiPort::flush (void* jack_port_buffer)
110 RingBuffer<Event>::rw_vector vec;
113 non_process_thread_fifo.get_read_vector (&vec);
115 if (vec.len[0] + vec.len[1]) {
116 cerr << "Flush " << vec.len[0] + vec.len[1] << " events from non-process FIFO\n";
120 Event* evp = vec.buf[0];
122 for (size_t n = 0; n < vec.len[0]; ++n, ++evp) {
123 jack_midi_event_write (jack_port_buffer,
124 (timestamp_t) evp->time(), evp->buffer(), evp->size());
129 Event* evp = vec.buf[1];
131 for (size_t n = 0; n < vec.len[1]; ++n, ++evp) {
132 jack_midi_event_write (jack_port_buffer,
133 (timestamp_t) evp->time(), evp->buffer(), evp->size());
137 if ((written = vec.len[0] + vec.len[1]) != 0) {
138 non_process_thread_fifo.increment_read_idx (written);
143 JACK_MidiPort::read(byte * buf, size_t bufsize)
145 assert(_currently_in_cycle);
146 assert(_jack_input_port);
148 jack_midi_event_t ev;
150 int err = jack_midi_event_get (&ev,
151 jack_port_get_buffer(_jack_input_port, _nframes_this_cycle),
154 // XXX this doesn't handle ev.size > max
157 size_t limit = min (bufsize, ev.size);
158 memcpy(buf, ev.buffer, limit);
166 JACK_MidiPort::create_ports(const XMLNode& node)
168 Descriptor desc (node);
170 assert(!_jack_input_port);
171 assert(!_jack_output_port);
173 jack_nframes_t nframes = jack_get_buffer_size(_jack_client);
177 if (desc.mode == O_RDWR || desc.mode == O_WRONLY) {
178 _jack_output_port = jack_port_register(_jack_client,
179 string(desc.tag).append("_out").c_str(),
180 JACK_DEFAULT_MIDI_TYPE, JackPortIsOutput, 0);
181 jack_midi_clear_buffer(jack_port_get_buffer(_jack_output_port, nframes));
182 ret = ret && (_jack_output_port != NULL);
185 if (desc.mode == O_RDWR || desc.mode == O_RDONLY) {
186 _jack_input_port = jack_port_register(_jack_client,
187 string(desc.tag).append("_in").c_str(),
188 JACK_DEFAULT_MIDI_TYPE, JackPortIsInput, 0);
189 jack_midi_clear_buffer(jack_port_get_buffer(_jack_input_port, nframes));
190 ret = ret && (_jack_input_port != NULL);
197 JACK_MidiPort::get_state () const
199 XMLNode& root (Port::get_state ());
204 JACK_MidiPort::set_state (const XMLNode& node)
209 JACK_MidiPort::set_process_thread (pthread_t thr)
211 _process_thread = thr;
215 JACK_MidiPort::is_process_thread()
217 return (pthread_self() == _process_thread);