2 Copyright (C) 2006 Paul 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.
22 #include "ardour/midi_port.h"
23 #include "ardour/data_type.h"
24 #include "ardour/audioengine.h"
26 using namespace ARDOUR;
29 MidiPort::MidiPort (const std::string& name, Flags flags)
30 : Port (name, DataType::MIDI, flags)
31 , _has_been_mixed_down (false)
32 , _resolve_in_process (false)
34 _buffer = new MidiBuffer (AudioEngine::instance()->raw_buffer_size (DataType::MIDI));
43 MidiPort::cycle_start (pframes_t nframes)
45 Port::cycle_start (nframes);
49 assert (_buffer->size () == 0);
51 if (sends_output ()) {
52 jack_midi_clear_buffer (jack_port_get_buffer (_jack_port, nframes));
57 MidiPort::get_midi_buffer (pframes_t nframes)
59 if (_has_been_mixed_down) {
63 if (receives_input ()) {
65 void* jack_buffer = jack_port_get_buffer (_jack_port, nframes);
66 const pframes_t event_count = jack_midi_get_event_count (jack_buffer);
68 assert (event_count < _buffer->capacity());
70 /* suck all relevant MIDI events from the JACK MIDI port buffer
74 for (pframes_t i = 0; i < event_count; ++i) {
78 jack_midi_event_get (&ev, jack_buffer, i);
80 if (ev.buffer[0] == 0xfe) {
81 /* throw away active sensing */
85 /* check that the event is in the acceptable time range */
87 if ((ev.time >= (_global_port_buffer_offset + _port_buffer_offset)) &&
88 (ev.time < (_global_port_buffer_offset + _port_buffer_offset + nframes))) {
89 _buffer->push_back (ev);
91 cerr << "Dropping incoming MIDI at time " << ev.time << "; offset="
92 << _global_port_buffer_offset << " limit="
93 << (_global_port_buffer_offset + _port_buffer_offset + nframes) << "\n";
98 _buffer->silence (nframes);
102 _has_been_mixed_down = true;
110 MidiPort::cycle_end (pframes_t /*nframes*/)
112 _has_been_mixed_down = false;
116 MidiPort::cycle_split ()
118 _has_been_mixed_down = false;
122 MidiPort::flush_buffers (pframes_t nframes, framepos_t time)
124 if (sends_output ()) {
126 void* jack_buffer = jack_port_get_buffer (_jack_port, nframes);
128 // Feed the data through the MidiStateTracker
131 _midi_state_tracker.track (_buffer->begin(), _buffer->end(), did_loop);
133 if (did_loop || _resolve_in_process) {
134 /* add necessary note offs */
135 _midi_state_tracker.resolve_notes (*_buffer, time);
138 _resolve_in_process = false;
140 for (MidiBuffer::iterator i = _buffer->begin(); i != _buffer->end(); ++i) {
141 const Evoral::Event<framepos_t>& ev = *i;
143 // event times are in frames, relative to cycle start
145 assert (ev.time() < (nframes + _global_port_buffer_offset + _port_buffer_offset));
147 if (ev.time() >= _global_port_buffer_offset + _port_buffer_offset) {
148 if (jack_midi_event_write (jack_buffer, (jack_nframes_t) ev.time(), ev.buffer(), ev.size()) != 0) {
149 cerr << "write failed, drop flushed note off on the floor, time "
150 << ev.time() << " > " << _global_port_buffer_offset + _port_buffer_offset << endl;
153 cerr << "drop flushed event on the floor, time " << ev.time()
154 << " < " << _global_port_buffer_offset + _port_buffer_offset << endl;
161 MidiPort::transport_stopped ()
163 _resolve_in_process = true;
171 _buffer = new MidiBuffer (AudioEngine::instance()->raw_buffer_size (DataType::MIDI));