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)
31 , _resolve_in_process (false)
33 _buffer = new MidiBuffer (raw_buffer_size(0));
42 MidiPort::cycle_start (nframes_t nframes)
45 assert (_buffer->size () == 0);
47 if (sends_output ()) {
48 jack_midi_clear_buffer (jack_port_get_buffer (_jack_port, nframes));
53 MidiPort::get_midi_buffer (nframes_t nframes, nframes_t offset)
55 if (_has_been_mixed_down) {
59 if (receives_input ()) {
61 void* jack_buffer = jack_port_get_buffer (_jack_port, nframes);
62 const nframes_t event_count = jack_midi_get_event_count(jack_buffer);
64 assert (event_count < _buffer->capacity());
66 /* suck all relevant MIDI events from the JACK MIDI port buffer
70 nframes_t off = offset + _port_offset;
72 for (nframes_t i = 0; i < event_count; ++i) {
76 jack_midi_event_get (&ev, jack_buffer, i);
78 if (ev.time > off && ev.time < off+nframes) {
79 _buffer->push_back (ev);
84 _has_been_mixed_down = true;
88 _buffer->silence (nframes);
92 _has_been_mixed_down = true;
100 MidiPort::cycle_end (nframes_t /*nframes*/)
102 _has_been_mixed_down = false;
106 MidiPort::cycle_split ()
108 _has_been_mixed_down = false;
112 MidiPort::flush_buffers (nframes_t nframes, nframes64_t time, nframes_t offset)
114 if (sends_output ()) {
116 void* jack_buffer = jack_port_get_buffer (_jack_port, nframes);
118 // Feed the data through the MidiStateTracker
121 _midi_state_tracker.track (_buffer->begin(), _buffer->end(), did_loop);
123 if (did_loop || _resolve_in_process) {
124 /* add necessary note offs */
125 _midi_state_tracker.resolve_notes (*_buffer, time);
128 _resolve_in_process = false;
130 for (MidiBuffer::iterator i = _buffer->begin(); i != _buffer->end(); ++i) {
131 const Evoral::Event<nframes_t>& ev = *i;
133 // event times are in frames, relative to cycle start
135 // XXX split cycle start or cycle start?
137 assert(ev.time() < (nframes+offset+_port_offset));
139 if (ev.time() >= offset + _port_offset) {
140 jack_midi_event_write (jack_buffer, (jack_nframes_t) ev.time(), ev.buffer(), ev.size());
147 MidiPort::transport_stopped ()
149 _resolve_in_process = true;
153 MidiPort::raw_buffer_size (nframes_t nframes) const
155 return jack_midi_max_event_size(jack_port_get_buffer(_jack_port, nframes));