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.
25 #include "pbd/error.h"
27 #include "midi++/types.h"
28 #include "midi++/jack.h"
34 pthread_t JACK_MidiPort::_process_thread;
36 JACK_MidiPort::JACK_MidiPort(const XMLNode& node, jack_client_t* jack_client)
38 , _jack_client(jack_client)
39 , _jack_input_port(NULL)
40 , _jack_output_port(NULL)
42 , non_process_thread_fifo (512)
44 int err = create_ports (node);
51 JACK_MidiPort::~JACK_MidiPort()
53 if (_jack_input_port) {
54 jack_port_unregister (_jack_client, _jack_input_port);
58 if (_jack_output_port) {
59 jack_port_unregister (_jack_client, _jack_input_port);
65 JACK_MidiPort::cycle_start (nframes_t nframes)
67 Port::cycle_start(nframes);
68 assert(_nframes_this_cycle == nframes);
70 _last_write_timestamp = 0;
72 if (_jack_output_port != 0) {
74 void *buffer = jack_port_get_buffer (_jack_output_port, nframes);
75 jack_midi_clear_buffer (buffer);
79 if (_jack_input_port != 0) {
81 void* jack_buffer = jack_port_get_buffer(_jack_input_port, nframes);
82 const nframes_t event_count = jack_midi_get_event_count(jack_buffer);
85 nframes_t cycle_start_frame = jack_last_frame_time (_jack_client);
87 for (nframes_t i=0; i < event_count; ++i) {
89 jack_midi_event_get (&ev, jack_buffer, i);
92 for (size_t i = 0; i < ev.size; i++) {
93 input_parser->set_timestamp (cycle_start_frame + ev.time);
94 input_parser->scanner (ev.buffer[i]);
102 JACK_MidiPort::cycle_end ()
104 if (_jack_output_port != 0) {
105 flush (jack_port_get_buffer (_jack_output_port, _nframes_this_cycle));
110 JACK_MidiPort::write(byte * msg, size_t msglen, timestamp_t timestamp)
114 if (!is_process_thread()) {
116 Glib::Mutex::Lock lm (non_process_thread_fifo_lock);
117 RingBuffer< Evoral::Event<double> >::rw_vector vec;
119 non_process_thread_fifo.get_write_vector (&vec);
121 if (vec.len[0] + vec.len[1] < 1) {
122 error << "no space in FIFO for non-process thread MIDI write" << endmsg;
127 vec.buf[0]->set (msg, msglen, timestamp);
129 vec.buf[1]->set (msg, msglen, timestamp);
132 non_process_thread_fifo.increment_write_idx (1);
138 assert(_jack_output_port);
140 // XXX This had to be temporarily commented out to make export work again
141 if (!(timestamp < _nframes_this_cycle)) {
142 std::cerr << "assertion timestamp < _nframes_this_cycle failed!" << std::endl;
145 if (_currently_in_cycle) {
146 if (timestamp == 0) {
147 timestamp = _last_write_timestamp;
150 if (jack_midi_event_write (jack_port_get_buffer (_jack_output_port, _nframes_this_cycle),
151 timestamp, msg, msglen) == 0) {
153 _last_write_timestamp = timestamp;
157 cerr << "write of " << msglen << " failed, port holds "
158 << jack_midi_get_event_count (jack_port_get_buffer (_jack_output_port, _nframes_this_cycle))
162 cerr << "write to JACK midi port failed: not currently in a process cycle." << endl;
166 if (ret > 0 && output_parser) {
167 output_parser->raw_preparse (*output_parser, msg, ret);
168 for (int i = 0; i < ret; i++) {
169 output_parser->scanner (msg[i]);
171 output_parser->raw_postparse (*output_parser, msg, ret);
178 JACK_MidiPort::flush (void* jack_port_buffer)
180 RingBuffer< Evoral::Event<double> >::rw_vector vec;
183 non_process_thread_fifo.get_read_vector (&vec);
185 if (vec.len[0] + vec.len[1]) {
186 // cerr << "Flush " << vec.len[0] + vec.len[1] << " events from non-process FIFO\n";
190 Evoral::Event<double>* evp = vec.buf[0];
192 for (size_t n = 0; n < vec.len[0]; ++n, ++evp) {
193 jack_midi_event_write (jack_port_buffer,
194 (timestamp_t) evp->time(), evp->buffer(), evp->size());
199 Evoral::Event<double>* evp = vec.buf[1];
201 for (size_t n = 0; n < vec.len[1]; ++n, ++evp) {
202 jack_midi_event_write (jack_port_buffer,
203 (timestamp_t) evp->time(), evp->buffer(), evp->size());
207 if ((written = vec.len[0] + vec.len[1]) != 0) {
208 non_process_thread_fifo.increment_read_idx (written);
213 JACK_MidiPort::read(byte * buf, size_t bufsize)
215 cerr << "This program is improperly written. JACK_MidiPort::read() should never be called\n";
220 JACK_MidiPort::create_ports(const XMLNode& node)
222 Descriptor desc (node);
224 assert(!_jack_input_port);
225 assert(!_jack_output_port);
227 jack_nframes_t nframes = jack_get_buffer_size(_jack_client);
231 if (desc.mode == O_RDWR || desc.mode == O_WRONLY) {
232 _jack_output_port = jack_port_register(_jack_client,
233 string(desc.tag).append("_out").c_str(),
234 JACK_DEFAULT_MIDI_TYPE, JackPortIsOutput, 0);
235 if (_jack_output_port) {
236 jack_midi_clear_buffer(jack_port_get_buffer(_jack_output_port, nframes));
238 ret = ret && (_jack_output_port != NULL);
241 if (desc.mode == O_RDWR || desc.mode == O_RDONLY) {
242 _jack_input_port = jack_port_register(_jack_client,
243 string(desc.tag).append("_in").c_str(),
244 JACK_DEFAULT_MIDI_TYPE, JackPortIsInput, 0);
245 if (_jack_input_port) {
246 jack_midi_clear_buffer(jack_port_get_buffer(_jack_input_port, nframes));
248 ret = ret && (_jack_input_port != NULL);
255 JACK_MidiPort::get_state () const
257 XMLNode& root (Port::get_state ());
262 JACK_MidiPort::set_state (const XMLNode& /*node*/)
267 JACK_MidiPort::set_process_thread (pthread_t thr)
269 _process_thread = thr;
273 JACK_MidiPort::is_process_thread()
275 return (pthread_self() == _process_thread);