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)
37 _buffer = new MidiBuffer (AudioEngine::instance()->raw_buffer_size (DataType::MIDI));
46 MidiPort::cycle_start (pframes_t nframes)
48 Port::cycle_start (nframes);
52 if (sends_output ()) {
53 port_engine.midi_clear (port_engine.get_buffer (_port_handle, nframes));
58 MidiPort::get_midi_buffer (pframes_t nframes)
60 if (_has_been_mixed_down) {
64 if (receives_input ()) {
68 void* buffer = port_engine.get_buffer (_port_handle, nframes);
69 const pframes_t event_count = port_engine.get_midi_event_count (buffer);
71 /* suck all relevant MIDI events from the MIDI port buffer
75 cerr << "grabbing " << event_count << " events\n";
77 for (pframes_t i = 0; i < event_count; ++i) {
83 port_engine.midi_event_get (timestamp, size, &buf, buffer, i);
86 /* throw away active sensing */
90 /* check that the event is in the acceptable time range */
92 if ((timestamp >= (_global_port_buffer_offset + _port_buffer_offset)) &&
93 (timestamp < (_global_port_buffer_offset + _port_buffer_offset + nframes))) {
94 _buffer->push_back (timestamp, size, buf);
96 cerr << "Dropping incoming MIDI at time " << timestamp << "; offset="
97 << _global_port_buffer_offset << " limit="
98 << (_global_port_buffer_offset + _port_buffer_offset + nframes) << "\n";
103 _buffer->silence (nframes);
107 _buffer->silence (nframes);
111 _has_been_mixed_down = true;
118 MidiPort::cycle_end (pframes_t /*nframes*/)
120 _has_been_mixed_down = false;
124 MidiPort::cycle_split ()
126 _has_been_mixed_down = false;
130 MidiPort::resolve_notes (void* port_buffer, MidiBuffer::TimeType when)
132 for (uint8_t channel = 0; channel <= 0xF; channel++) {
134 uint8_t ev[3] = { ((uint8_t) (MIDI_CMD_CONTROL | channel)), MIDI_CTL_SUSTAIN, 0 };
136 /* we need to send all notes off AND turn the
137 * sustain/damper pedal off to handle synths
138 * that prioritize sustain over AllNotesOff
141 if (port_engine.midi_event_put (port_buffer, when, ev, 3) != 0) {
142 cerr << "failed to deliver sustain-zero on channel " << channel << " on port " << name() << endl;
145 ev[1] = MIDI_CTL_ALL_NOTES_OFF;
147 if (port_engine.midi_event_put (port_buffer, 0, ev, 3) != 0) {
148 cerr << "failed to deliver ALL NOTES OFF on channel " << channel << " on port " << name() << endl;
154 MidiPort::flush_buffers (pframes_t nframes)
156 if (sends_output ()) {
158 void* port_buffer = port_engine.get_buffer (_port_handle, nframes);
160 if (_resolve_required) {
161 /* resolve all notes at the start of the buffer */
162 resolve_notes (port_buffer, 0);
163 _resolve_required = false;
166 for (MidiBuffer::iterator i = _buffer->begin(); i != _buffer->end(); ++i) {
168 const Evoral::MIDIEvent<MidiBuffer::TimeType> ev (*i, false);
170 // event times are in frames, relative to cycle start
172 assert (ev.time() < (nframes + _global_port_buffer_offset + _port_buffer_offset));
174 if (ev.time() >= _global_port_buffer_offset + _port_buffer_offset) {
175 if (port_engine.midi_event_put (port_buffer, (pframes_t) ev.time(), ev.buffer(), ev.size()) != 0) {
176 cerr << "write failed, drop flushed note off on the floor, time "
177 << ev.time() << " > " << _global_port_buffer_offset + _port_buffer_offset << endl;
180 cerr << "drop flushed event on the floor, time " << ev
181 << " to early for " << _global_port_buffer_offset
182 << " + " << _port_buffer_offset << endl;
189 MidiPort::require_resolve ()
191 _resolve_required = true;
195 MidiPort::transport_stopped ()
197 _resolve_required = true;
201 MidiPort::realtime_locate ()
203 _resolve_required = true;
211 cerr << name() << " new MIDI buffer of size " << AudioEngine::instance()->raw_buffer_size (DataType::MIDI) << endl;
212 _buffer = new MidiBuffer (AudioEngine::instance()->raw_buffer_size (DataType::MIDI));
216 MidiPort::set_input_active (bool yn)