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 "pbd/compose.h"
23 #include "pbd/debug.h"
25 #include "ardour/audioengine.h"
26 #include "ardour/data_type.h"
27 #include "ardour/debug.h"
28 #include "ardour/midi_buffer.h"
29 #include "ardour/midi_port.h"
30 #include "ardour/session.h"
33 using namespace ARDOUR;
36 #define port_engine AudioEngine::instance()->port_engine()
38 MidiPort::MidiPort (const std::string& name, PortFlags flags)
39 : Port (name, DataType::MIDI, flags)
40 , _has_been_mixed_down (false)
41 , _resolve_required (false)
42 , _input_active (true)
43 , _always_parse (false)
46 _buffer = new MidiBuffer (AudioEngine::instance()->raw_buffer_size (DataType::MIDI));
52 AudioEngine::instance()->unregister_port (_shadow_port);
53 _shadow_port.reset ();
60 MidiPort::cycle_start (pframes_t nframes)
62 samplepos_t now = AudioEngine::instance()->sample_time_at_cycle_start();
64 Port::cycle_start (nframes);
68 if (sends_output () && _port_handle) {
69 port_engine.midi_clear (port_engine.get_buffer (_port_handle, nframes));
72 if (_always_parse || (receives_input() && _trace_on)) {
73 MidiBuffer& mb (get_midi_buffer (nframes));
75 /* dump incoming MIDI to parser */
77 for (MidiBuffer::iterator b = mb.begin(); b != mb.end(); ++b) {
78 uint8_t* buf = (*b).buffer();
80 _self_parser.set_timestamp (now + (*b).time());
82 uint32_t limit = (*b).size();
84 for (size_t n = 0; n < limit; ++n) {
85 _self_parser.scanner (buf[n]);
90 if (inbound_midi_filter) {
91 MidiBuffer& mb (get_midi_buffer (nframes));
92 inbound_midi_filter (mb, mb);
96 MidiBuffer& mb (get_midi_buffer (nframes));
97 if (shadow_midi_filter (mb, _shadow_port->get_midi_buffer (nframes))) {
98 _shadow_port->flush_buffers (nframes);
105 MidiPort::get_buffer (pframes_t nframes)
107 return get_midi_buffer (nframes);
111 MidiPort::get_midi_buffer (pframes_t nframes)
113 if (_has_been_mixed_down) {
117 if (receives_input ()) {
121 void* buffer = port_engine.get_buffer (_port_handle, nframes);
122 const pframes_t event_count = port_engine.get_midi_event_count (buffer);
124 /* suck all relevant MIDI events from the MIDI port buffer
128 for (pframes_t i = 0; i < event_count; ++i) {
134 port_engine.midi_event_get (timestamp, size, &buf, buffer, i);
136 if (buf[0] == 0xfe) {
137 /* throw away active sensing */
141 timestamp = floor (timestamp * _speed_ratio);
143 /* check that the event is in the acceptable time range */
144 if ((timestamp < (_global_port_buffer_offset)) ||
145 (timestamp >= (_global_port_buffer_offset + nframes))) {
146 // XXX this is normal after a split cycles:
147 // The engine buffer contains the data for the complete cycle, but
148 // only the part after _global_port_buffer_offset is needed.
150 cerr << "Dropping incoming MIDI at time " << timestamp << "; offset="
151 << _global_port_buffer_offset << " limit="
152 << (_global_port_buffer_offset + nframes)
153 << " = (" << _global_port_buffer_offset
160 /* adjust timestamp to match current cycle */
161 timestamp -= _global_port_buffer_offset;
162 assert (timestamp < nframes);
164 if ((buf[0] & 0xF0) == 0x90 && buf[2] == 0) {
165 /* normalize note on with velocity 0 to proper note off */
167 ev[0] = 0x80 | (buf[0] & 0x0F); /* note off */
169 ev[2] = 0x40; /* default velocity */
170 _buffer->push_back (timestamp, size, ev);
172 _buffer->push_back (timestamp, size, buf);
177 _buffer->silence (nframes);
181 _buffer->silence (nframes);
185 _has_been_mixed_down = true;
192 MidiPort::cycle_end (pframes_t /*nframes*/)
194 _has_been_mixed_down = false;
198 MidiPort::cycle_split ()
200 _has_been_mixed_down = false;
204 MidiPort::resolve_notes (void* port_buffer, MidiBuffer::TimeType when)
206 for (uint8_t channel = 0; channel <= 0xF; channel++) {
208 uint8_t ev[3] = { ((uint8_t) (MIDI_CMD_CONTROL | channel)), MIDI_CTL_SUSTAIN, 0 };
209 pframes_t tme = floor (when / _speed_ratio);
211 /* we need to send all notes off AND turn the
212 * sustain/damper pedal off to handle synths
213 * that prioritize sustain over AllNotesOff
216 if (port_engine.midi_event_put (port_buffer, tme, ev, 3) != 0) {
217 cerr << "failed to deliver sustain-zero on channel " << (int)channel << " on port " << name() << endl;
220 ev[1] = MIDI_CTL_ALL_NOTES_OFF;
222 if (port_engine.midi_event_put (port_buffer, tme, ev, 3) != 0) {
223 cerr << "failed to deliver ALL NOTES OFF on channel " << (int)channel << " on port " << name() << endl;
229 MidiPort::flush_buffers (pframes_t nframes)
231 if (sends_output ()) {
233 void* port_buffer = 0;
235 if (_resolve_required) {
236 port_buffer = port_engine.get_buffer (_port_handle, nframes);
237 /* resolve all notes at the start of the buffer */
238 resolve_notes (port_buffer, _global_port_buffer_offset);
239 _resolve_required = false;
242 if (_buffer->empty()) {
247 port_buffer = port_engine.get_buffer (_port_handle, nframes);
251 for (MidiBuffer::iterator i = _buffer->begin(); i != _buffer->end(); ++i) {
253 const Evoral::Event<MidiBuffer::TimeType> ev (*i, false);
256 if (sends_output() && _trace_on) {
257 uint8_t const * const buf = ev.buffer();
258 const samplepos_t now = AudioEngine::instance()->sample_time_at_cycle_start();
260 _self_parser.set_timestamp (now + ev.time());
262 uint32_t limit = ev.size();
264 for (size_t n = 0; n < limit; ++n) {
265 _self_parser.scanner (buf[n]);
270 // event times are in samples, relative to cycle start
273 if (DEBUG_ENABLED (DEBUG::MidiIO)) {
274 const Session* s = AudioEngine::instance()->session();
275 const samplepos_t now = (s ? s->transport_sample() : 0);
277 DEBUG_STR_APPEND(a, string_compose ("MidiPort %7 %1 pop event @ %2 (global %4, within %5 gpbo %6 sz %3 ", _buffer, ev.time(), ev.size(),
278 now + ev.time(), nframes, _global_port_buffer_offset, name()));
279 for (size_t i=0; i < ev.size(); ++i) {
280 DEBUG_STR_APPEND(a,hex);
281 DEBUG_STR_APPEND(a,"0x");
282 DEBUG_STR_APPEND(a,(int)(ev.buffer()[i]));
283 DEBUG_STR_APPEND(a,' ');
285 DEBUG_STR_APPEND(a,'\n');
286 DEBUG_TRACE (DEBUG::MidiIO, DEBUG_STR(a).str());
290 assert (ev.time() < (nframes + _global_port_buffer_offset));
292 if (ev.time() >= _global_port_buffer_offset) {
293 pframes_t tme = floor (ev.time() / _speed_ratio);
294 if (port_engine.midi_event_put (port_buffer, tme, ev.buffer(), ev.size()) != 0) {
295 cerr << "write failed, dropped event, time "
297 << " > " << _global_port_buffer_offset << endl;
300 cerr << "drop flushed event on the floor, time " << ev.time()
301 << " too early for " << _global_port_buffer_offset;
302 for (size_t xx = 0; xx < ev.size(); ++xx) {
303 cerr << ' ' << hex << (int) ev.buffer()[xx];
309 /* done.. the data has moved to the port buffer, mark it so
317 MidiPort::require_resolve ()
319 _resolve_required = true;
323 MidiPort::transport_stopped ()
325 _resolve_required = true;
329 MidiPort::realtime_locate ()
331 _resolve_required = true;
339 cerr << name() << " new MIDI buffer of size " << AudioEngine::instance()->raw_buffer_size (DataType::MIDI) << endl;
340 _buffer = new MidiBuffer (AudioEngine::instance()->raw_buffer_size (DataType::MIDI));
344 MidiPort::set_input_active (bool yn)
350 MidiPort::set_always_parse (bool yn)
356 MidiPort::set_trace_on (bool yn)
362 MidiPort::add_shadow_port (string const & name, MidiFilter mf)
364 if (!ARDOUR::Port::receives_input()) {
372 shadow_midi_filter = mf;
374 if (!(_shadow_port = boost::dynamic_pointer_cast<MidiPort> (AudioEngine::instance()->register_output_port (DataType::MIDI, name, false, PortFlags (Shadow|IsTerminal))))) {
378 /* forward on our port latency to the shadow port.
380 XXX: need to capture latency changes and forward them too.
383 LatencyRange latency = private_latency_range (false);
384 _shadow_port->set_private_latency_range (latency, false);