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.
20 #include <ardour/jack_midi_port.h>
22 using namespace ARDOUR;
23 JackMidiPort::JackMidiPort (const std::string& name, Flags flgs, MidiBuffer* buf)
25 , JackPort (name, DataType::MIDI, flgs)
26 , BaseMidiPort (name, flgs)
35 /* data space will be provided by JACK */
37 _buffer = new MidiBuffer (0);
43 JackMidiPort::cycle_start (nframes_t nframes, nframes_t offset_ignored_but_probably_should_not_be)
46 assert(_buffer->size() == 0);
48 if (_flags & IsOutput) {
49 // no buffer, nothing to do
53 // We're an input - copy Jack events to internal buffer
55 void* jack_buffer = jack_port_get_buffer(_port, nframes);
56 const nframes_t event_count = jack_midi_get_event_count(jack_buffer);
58 assert(event_count < _buffer->capacity());
62 for (nframes_t i=0; i < event_count; ++i) {
64 jack_midi_event_get (&ev, jack_buffer, i);
66 _buffer->push_back (ev);
69 assert(_buffer->size() == event_count);
71 //if (_buffer->size() > 0)
72 // cerr << "MIDIPort got " << event_count << " events." << endl;
76 JackMidiPort::cycle_end (nframes_t nframes, nframes_t offset_ignored_but_probably_should_not_be)
78 if (_flags & IsInput) {
82 // We're an output - copy events from source buffer to Jack buffer
84 void* jack_buffer = jack_port_get_buffer (_port, nframes);
86 jack_midi_clear_buffer (jack_buffer);
88 for (MidiBuffer::iterator i = _buffer->begin(); i != _buffer->end(); ++i) {
89 const MidiEvent& ev = *i;
90 // event times should be frames, relative to cycle start
91 assert(ev.time() >= 0);
92 assert(ev.time() < nframes);
93 jack_midi_event_write (jack_buffer, (jack_nframes_t) ev.time(), ev.buffer(), ev.size());