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)
27 , _has_been_mixed_down (false)
29 // MIDI ports always need a buffer since jack buffer format is different
37 JackMidiPort::cycle_start (nframes_t nframes, nframes_t offset)
42 assert(_buffer->size() == 0);
44 if (_flags & IsInput) {
48 // We're an output - delete the midi_events.
50 void* jack_buffer = jack_port_get_buffer (_port, nframes);
52 jack_midi_clear_buffer (jack_buffer);
56 JackMidiPort::get_midi_buffer( nframes_t nframes, nframes_t offset ) {
58 if (_has_been_mixed_down)
61 if (_flags & IsOutput) {
65 // We're an input - copy Jack events to internal buffer
67 void* jack_buffer = jack_port_get_buffer(_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);
83 assert(_buffer->size() == event_count);
85 /*if (_buffer->size() > 0)
86 cerr << "JackMIDIPort got " << event_count << " events (buf " << _buffer << ")" << endl;*/
88 _has_been_mixed_down = true;
94 JackMidiPort::cycle_end (nframes_t nframes, nframes_t offset)
98 _has_been_mixed_down = false;
101 if (_flags & IsInput) {
105 // We're an output - copy events from source buffer to Jack buffer
107 void* jack_buffer = jack_port_get_buffer (_port, nframes);
109 jack_midi_clear_buffer (jack_buffer);
111 for (MidiBuffer::iterator i = _buffer->begin(); i != _buffer->end(); ++i) {
112 const Evoral::Event& ev = *i;
114 // event times should be frames, relative to cycle start
115 assert(ev.time() >= 0);
116 assert(ev.time() < nframes);
117 jack_midi_event_write (jack_buffer, (jack_nframes_t) ev.time(), ev.buffer(), ev.size());
123 JackMidiPort::flush_buffers (nframes_t nframes, nframes_t offset)
127 if (_flags & IsInput) {
131 void* jack_buffer = jack_port_get_buffer (_port, nframes);
133 for (MidiBuffer::iterator i = _buffer->begin(); i != _buffer->end(); ++i) {
134 const Evoral::Event& ev = *i;
135 // event times should be frames, relative to cycle start
136 assert(ev.time() >= 0);
137 assert(ev.time() < (nframes+offset));
138 if (ev.time() >= offset)
139 jack_midi_event_write (jack_buffer, (jack_nframes_t) ev.time(), ev.buffer(), ev.size());