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, bool ext, nframes_t capacity)
29 : Port (name, DataType::MIDI, flags, ext)
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 (capacity * 32);
44 MidiPort::cycle_start (nframes_t nframes, nframes_t offset)
48 assert (_buffer->size () == 0);
50 if (sends_output ()) {
51 jack_midi_clear_buffer (jack_port_get_buffer (_jack_port, nframes));
57 MidiPort::get_midi_buffer (nframes_t nframes, nframes_t offset)
59 if (_has_been_mixed_down) {
63 if (receives_input ()) {
67 void* jack_buffer = jack_port_get_buffer (_jack_port, nframes);
68 const nframes_t event_count = jack_midi_get_event_count(jack_buffer);
70 assert (event_count < _buffer->capacity());
74 for (nframes_t i = 0; i < event_count; ++i) {
76 jack_midi_event_get (&ev, jack_buffer, i);
78 // i guess this should do but i leave it off to test the rest first.
79 //if (ev.time > offset && ev.time < offset+nframes)
80 _buffer->push_back (ev);
84 _has_been_mixed_down = true;
87 if (!_connections.empty()) {
88 mixdown (nframes, offset, false);
93 if (_connections.empty()) {
94 _buffer->silence (nframes, offset);
96 mixdown (nframes, offset, true);
101 _buffer->silence (nframes, offset);
105 _has_been_mixed_down = true;
113 MidiPort::cycle_end (nframes_t nframes, nframes_t offset)
117 if (external () && sends_output ()) {
120 // We're an output - copy events from source buffer to Jack buffer
122 void* jack_buffer = jack_port_get_buffer (_jack_port, nframes);
124 jack_midi_clear_buffer (jack_buffer);
126 for (MidiBuffer::iterator i = _buffer->begin(); i != _buffer->end(); ++i) {
127 const Evoral::Event& ev = *i;
129 // event times should be frames, relative to cycle start
130 assert(ev.time() >= 0);
131 assert(ev.time() < nframes);
132 jack_midi_event_write (jack_buffer, (jack_nframes_t) ev.time(), ev.buffer(), ev.size());
137 _has_been_mixed_down = false;
141 MidiPort::flush_buffers (nframes_t nframes, nframes_t offset)
145 if (external () && sends_output ()) {
147 void* jack_buffer = jack_port_get_buffer (_jack_port, nframes);
149 for (MidiBuffer::iterator i = _buffer->begin(); i != _buffer->end(); ++i) {
150 const Evoral::Event<double>& ev = *i;
151 // event times should be frames, relative to cycle start
152 assert(ev.time() >= 0);
153 assert(ev.time() < (nframes+offset));
154 if (ev.time() >= offset) {
155 jack_midi_event_write (jack_buffer, (jack_nframes_t) ev.time(), ev.buffer(), ev.size());
162 MidiPort::mixdown (nframes_t cnt, nframes_t offset, bool first_overwrite)
164 set<Port*>::const_iterator p = _connections.begin();
166 if (first_overwrite) {
167 _buffer->read_from ((dynamic_cast<MidiPort*>(*p))->get_midi_buffer (cnt, offset), cnt, offset);
171 // XXX DAVE: this is just a guess
173 for (; p != _connections.end(); ++p) {
174 _buffer->merge (*_buffer, (dynamic_cast<MidiPort*>(*p))->get_midi_buffer (cnt, offset));