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>
25 using namespace ARDOUR;
28 MidiPort::MidiPort (const std::string& name, Flags flags)
29 : Port (name, DataType::MIDI, flags)
30 , _has_been_mixed_down (false)
32 // FIXME: size kludge (see BufferSet::ensure_buffers)
33 // Jack needs to tell us this
34 _buffer = new MidiBuffer (1024 * 32);
44 MidiPort::cycle_start (nframes_t nframes, nframes_t offset)
47 assert (_buffer->size () == 0);
49 if (sends_output ()) {
50 jack_midi_clear_buffer (jack_port_get_buffer (_jack_port, nframes));
55 MidiPort::get_midi_buffer (nframes_t nframes, nframes_t offset)
57 if (_has_been_mixed_down) {
61 if (receives_input ()) {
63 void* jack_buffer = jack_port_get_buffer (_jack_port, nframes);
64 const nframes_t event_count = jack_midi_get_event_count(jack_buffer);
66 assert (event_count < _buffer->capacity());
70 for (nframes_t i = 0; i < event_count; ++i) {
72 jack_midi_event_get (&ev, jack_buffer, i);
74 // i guess this should do but i leave it off to test the rest first.
75 //if (ev.time > offset && ev.time < offset+nframes)
76 _buffer->push_back (ev);
80 _has_been_mixed_down = true;
84 _buffer->silence (nframes, offset);
88 _has_been_mixed_down = true;
96 MidiPort::cycle_end (nframes_t nframes, nframes_t offset)
100 if (sends_output ()) {
103 // We're an output - copy events from source buffer to Jack buffer
105 void* jack_buffer = jack_port_get_buffer (_jack_port, nframes);
107 jack_midi_clear_buffer (jack_buffer);
109 for (MidiBuffer::iterator i = _buffer->begin(); i != _buffer->end(); ++i) {
110 const Evoral::Event& ev = *i;
112 // event times should be frames, relative to cycle start
113 assert(ev.time() >= 0);
114 assert(ev.time() < nframes);
115 jack_midi_event_write (jack_buffer, (jack_nframes_t) ev.time(), ev.buffer(), ev.size());
120 _has_been_mixed_down = false;
124 MidiPort::flush_buffers (nframes_t nframes, nframes_t offset)
128 if (sends_output ()) {
130 void* jack_buffer = jack_port_get_buffer (_jack_port, nframes);
132 for (MidiBuffer::iterator i = _buffer->begin(); i != _buffer->end(); ++i) {
133 const Evoral::Event<double>& ev = *i;
134 // event times should be frames, relative to cycle start
135 assert(ev.time() >= 0);
136 assert(ev.time() < (nframes+offset));
137 if (ev.time() >= offset) {
138 jack_midi_event_write (jack_buffer, (jack_nframes_t) ev.time(), ev.buffer(), ev.size());