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"
24 #include "ardour/audioengine.h"
26 using namespace ARDOUR;
29 #define port_engine AudioEngine::instance()->port_engine()
31 MidiPort::MidiPort (const std::string& name, PortFlags flags)
32 : Port (name, DataType::MIDI, flags)
33 , _has_been_mixed_down (false)
34 , _resolve_required (false)
35 , _input_active (true)
36 , _always_parse (false)
38 _buffer = new MidiBuffer (AudioEngine::instance()->raw_buffer_size (DataType::MIDI));
47 MidiPort::cycle_start (pframes_t nframes)
49 framepos_t now = AudioEngine::instance()->sample_time_at_cycle_start();
51 Port::cycle_start (nframes);
55 if (sends_output ()) {
56 port_engine.midi_clear (port_engine.get_buffer (_port_handle, nframes));
60 MidiBuffer& mb (get_midi_buffer (nframes));
62 /* dump incoming MIDI to parser */
64 for (MidiBuffer::iterator b = mb.begin(); b != mb.end(); ++b) {
65 uint8_t* buf = (*b).buffer();
67 _self_parser.set_timestamp (now + (*b).time());
69 uint32_t limit = (*b).size();
71 for (size_t n = 0; n < limit; ++n) {
72 _self_parser.scanner (buf[n]);
79 MidiPort::get_midi_buffer (pframes_t nframes)
81 if (_has_been_mixed_down) {
85 if (receives_input ()) {
89 void* buffer = port_engine.get_buffer (_port_handle, nframes);
90 const pframes_t event_count = port_engine.get_midi_event_count (buffer);
92 /* suck all relevant MIDI events from the MIDI port buffer
96 for (pframes_t i = 0; i < event_count; ++i) {
102 port_engine.midi_event_get (timestamp, size, &buf, buffer, i);
104 if (buf[0] == 0xfe) {
105 /* throw away active sensing */
109 /* check that the event is in the acceptable time range */
111 if ((timestamp >= (_global_port_buffer_offset + _port_buffer_offset)) &&
112 (timestamp < (_global_port_buffer_offset + _port_buffer_offset + nframes))) {
113 _buffer->push_back (timestamp, size, buf);
115 cerr << "Dropping incoming MIDI at time " << timestamp << "; offset="
116 << _global_port_buffer_offset << " limit="
117 << (_global_port_buffer_offset + _port_buffer_offset + nframes) << "\n";
122 _buffer->silence (nframes);
126 _buffer->silence (nframes);
130 _has_been_mixed_down = true;
137 MidiPort::cycle_end (pframes_t /*nframes*/)
139 _has_been_mixed_down = false;
143 MidiPort::cycle_split ()
145 _has_been_mixed_down = false;
149 MidiPort::resolve_notes (void* port_buffer, MidiBuffer::TimeType when)
151 for (uint8_t channel = 0; channel <= 0xF; channel++) {
153 uint8_t ev[3] = { ((uint8_t) (MIDI_CMD_CONTROL | channel)), MIDI_CTL_SUSTAIN, 0 };
155 /* we need to send all notes off AND turn the
156 * sustain/damper pedal off to handle synths
157 * that prioritize sustain over AllNotesOff
160 if (port_engine.midi_event_put (port_buffer, when, ev, 3) != 0) {
161 cerr << "failed to deliver sustain-zero on channel " << channel << " on port " << name() << endl;
164 ev[1] = MIDI_CTL_ALL_NOTES_OFF;
166 if (port_engine.midi_event_put (port_buffer, 0, ev, 3) != 0) {
167 cerr << "failed to deliver ALL NOTES OFF on channel " << channel << " on port " << name() << endl;
173 MidiPort::flush_buffers (pframes_t nframes)
175 if (sends_output ()) {
177 void* port_buffer = port_engine.get_buffer (_port_handle, nframes);
179 if (_resolve_required) {
180 /* resolve all notes at the start of the buffer */
181 resolve_notes (port_buffer, 0);
182 _resolve_required = false;
185 for (MidiBuffer::iterator i = _buffer->begin(); i != _buffer->end(); ++i) {
187 const Evoral::MIDIEvent<MidiBuffer::TimeType> ev (*i, false);
189 // event times are in frames, relative to cycle start
191 assert (ev.time() < (nframes + _global_port_buffer_offset + _port_buffer_offset));
193 if (ev.time() >= _global_port_buffer_offset + _port_buffer_offset) {
194 if (port_engine.midi_event_put (port_buffer, (pframes_t) ev.time(), ev.buffer(), ev.size()) != 0) {
195 cerr << "write failed, drop flushed note off on the floor, time "
196 << ev.time() << " > " << _global_port_buffer_offset + _port_buffer_offset << endl;
199 cerr << "drop flushed event on the floor, time " << ev
200 << " to early for " << _global_port_buffer_offset
201 << " + " << _port_buffer_offset << endl;
208 MidiPort::require_resolve ()
210 _resolve_required = true;
214 MidiPort::transport_stopped ()
216 _resolve_required = true;
220 MidiPort::realtime_locate ()
222 _resolve_required = true;
230 cerr << name() << " new MIDI buffer of size " << AudioEngine::instance()->raw_buffer_size (DataType::MIDI) << endl;
231 _buffer = new MidiBuffer (AudioEngine::instance()->raw_buffer_size (DataType::MIDI));
235 MidiPort::set_input_active (bool yn)
241 MidiPort::set_always_parse (bool yn)